Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

90 files changed, 31981 insertions, 0 deletions

diff --git a/gfx/angle/checkout/src/common/CircularBuffer.h b/gfx/angle/checkout/src/common/CircularBuffer.h
new file mode 100644
index 0000000000..3ff5f14d1b
--- /dev/null
+++ b/gfx/angle/checkout/src/common/CircularBuffer.h
@@ -0,0 +1,175 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// CircularBuffer.h:
+//   An array class with an index that loops through the elements.
+//
+
+#ifndef COMMON_CIRCULARBUFFER_H_
+#define COMMON_CIRCULARBUFFER_H_
+
+#include "common/debug.h"
+
+#include <algorithm>
+#include <array>
+
+namespace angle
+{
+template <class T, size_t N, class Storage = std::array<T, N>>
+class CircularBuffer final
+{
+  public:
+    using value_type      = typename Storage::value_type;
+    using size_type       = typename Storage::size_type;
+    using reference       = typename Storage::reference;
+    using const_reference = typename Storage::const_reference;
+    using pointer         = typename Storage::pointer;
+    using const_pointer   = typename Storage::const_pointer;
+    using iterator        = typename Storage::iterator;
+    using const_iterator  = typename Storage::const_iterator;
+
+    CircularBuffer();
+    CircularBuffer(const value_type &value);
+
+    CircularBuffer(const CircularBuffer<T, N, Storage> &other);
+    CircularBuffer(CircularBuffer<T, N, Storage> &&other);
+
+    CircularBuffer<T, N, Storage> &operator=(const CircularBuffer<T, N, Storage> &other);
+    CircularBuffer<T, N, Storage> &operator=(CircularBuffer<T, N, Storage> &&other);
+
+    ~CircularBuffer();
+
+    // begin() and end() are used to iterate over all elements regardless of the current position of
+    // the front of the buffer.  Useful for initialization and clean up, as otherwise only the front
+    // element is expected to be accessed.
+    iterator begin();
+    const_iterator begin() const;
+
+    iterator end();
+    const_iterator end() const;
+
+    size_type size() const;
+
+    reference front();
+    const_reference front() const;
+
+    void swap(CircularBuffer<T, N, Storage> &other);
+
+    // Move the front forward to the next index, looping back to the beginning if the end of the
+    // array is reached.
+    void next();
+
+  private:
+    Storage mData;
+    size_type mFrontIndex;
+};
+
+template <class T, size_t N, class Storage>
+CircularBuffer<T, N, Storage>::CircularBuffer() : mFrontIndex(0)
+{}
+
+template <class T, size_t N, class Storage>
+CircularBuffer<T, N, Storage>::CircularBuffer(const value_type &value) : CircularBuffer()
+{
+    std::fill(begin(), end(), value);
+}
+
+template <class T, size_t N, class Storage>
+CircularBuffer<T, N, Storage>::CircularBuffer(const CircularBuffer<T, N, Storage> &other)
+{
+    *this = other;
+}
+
+template <class T, size_t N, class Storage>
+CircularBuffer<T, N, Storage>::CircularBuffer(CircularBuffer<T, N, Storage> &&other)
+    : CircularBuffer()
+{
+    swap(other);
+}
+
+template <class T, size_t N, class Storage>
+CircularBuffer<T, N, Storage> &CircularBuffer<T, N, Storage>::operator=(
+    const CircularBuffer<T, N, Storage> &other)
+{
+    std::copy(other.begin(), other.end(), begin());
+    mFrontIndex = other.mFrontIndex;
+    return *this;
+}
+
+template <class T, size_t N, class Storage>
+CircularBuffer<T, N, Storage> &CircularBuffer<T, N, Storage>::operator=(
+    CircularBuffer<T, N, Storage> &&other)
+{
+    swap(other);
+    return *this;
+}
+
+template <class T, size_t N, class Storage>
+CircularBuffer<T, N, Storage>::~CircularBuffer() = default;
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename CircularBuffer<T, N, Storage>::iterator CircularBuffer<T, N, Storage>::begin()
+{
+    return mData.begin();
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename CircularBuffer<T, N, Storage>::const_iterator
+CircularBuffer<T, N, Storage>::begin() const
+{
+    return mData.begin();
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename CircularBuffer<T, N, Storage>::iterator CircularBuffer<T, N, Storage>::end()
+{
+    return mData.end();
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename CircularBuffer<T, N, Storage>::const_iterator
+CircularBuffer<T, N, Storage>::end() const
+{
+    return mData.end();
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename CircularBuffer<T, N, Storage>::size_type CircularBuffer<T, N, Storage>::size()
+    const
+{
+    return N;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename CircularBuffer<T, N, Storage>::reference
+CircularBuffer<T, N, Storage>::front()
+{
+    ASSERT(mFrontIndex < size());
+    return mData[mFrontIndex];
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename CircularBuffer<T, N, Storage>::const_reference
+CircularBuffer<T, N, Storage>::front() const
+{
+    ASSERT(mFrontIndex < size());
+    return mData[mFrontIndex];
+}
+
+template <class T, size_t N, class Storage>
+void CircularBuffer<T, N, Storage>::swap(CircularBuffer<T, N, Storage> &other)
+{
+    std::swap(mData, other.mData);
+    std::swap(mFrontIndex, other.mFrontIndex);
+}
+
+template <class T, size_t N, class Storage>
+void CircularBuffer<T, N, Storage>::next()
+{
+    mFrontIndex = (mFrontIndex + 1) % size();
+}
+}  // namespace angle
+
+#endif  // COMMON_CIRCULARBUFFER_H_
diff --git a/gfx/angle/checkout/src/common/Color.h b/gfx/angle/checkout/src/common/Color.h
new file mode 100644
index 0000000000..b228d8e8c5
--- /dev/null
+++ b/gfx/angle/checkout/src/common/Color.h
@@ -0,0 +1,104 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// Color.h : Defines the Color type used throughout the ANGLE libraries
+
+#ifndef COMMON_COLOR_H_
+#define COMMON_COLOR_H_
+
+#include <cstdint>
+
+namespace angle
+{
+
+template <typename T>
+struct Color
+{
+    Color();
+    constexpr Color(T r, T g, T b, T a);
+
+    const T *data() const { return &red; }
+    T *ptr() { return &red; }
+
+    static Color fromData(const T *data) { return Color(data[0], data[1], data[2], data[3]); }
+    void writeData(T *data) const
+    {
+        data[0] = red;
+        data[1] = green;
+        data[2] = blue;
+        data[3] = alpha;
+    }
+
+    T red;
+    T green;
+    T blue;
+    T alpha;
+};
+
+template <typename T>
+bool operator==(const Color<T> &a, const Color<T> &b);
+
+template <typename T>
+bool operator!=(const Color<T> &a, const Color<T> &b);
+
+typedef Color<float> ColorF;
+typedef Color<int> ColorI;
+typedef Color<unsigned int> ColorUI;
+
+struct ColorGeneric
+{
+    inline ColorGeneric();
+    inline ColorGeneric(const ColorF &color);
+    inline ColorGeneric(const ColorI &color);
+    inline ColorGeneric(const ColorUI &color);
+
+    enum class Type : uint8_t
+    {
+        Float = 0,
+        Int   = 1,
+        UInt  = 2
+    };
+
+    union
+    {
+        ColorF colorF;
+        ColorI colorI;
+        ColorUI colorUI;
+    };
+
+    Type type;
+};
+
+inline bool operator==(const ColorGeneric &a, const ColorGeneric &b);
+
+inline bool operator!=(const ColorGeneric &a, const ColorGeneric &b);
+
+struct DepthStencil
+{
+    DepthStencil() : depth(0), stencil(0) {}
+
+    // Double is needed to represent the 32-bit integer range of GL_DEPTH_COMPONENT32.
+    double depth;
+    uint32_t stencil;
+};
+}  // namespace angle
+
+// TODO: Move this fully into the angle namespace
+namespace gl
+{
+
+template <typename T>
+using Color        = angle::Color<T>;
+using ColorF       = angle::ColorF;
+using ColorI       = angle::ColorI;
+using ColorUI      = angle::ColorUI;
+using ColorGeneric = angle::ColorGeneric;
+
+}  // namespace gl
+
+#include "Color.inc"
+
+#endif  // COMMON_COLOR_H_
diff --git a/gfx/angle/checkout/src/common/Color.inc b/gfx/angle/checkout/src/common/Color.inc
new file mode 100644
index 0000000000..0e1445111b
--- /dev/null
+++ b/gfx/angle/checkout/src/common/Color.inc
@@ -0,0 +1,69 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// Color.inc : Inline definitions of some functions from Color.h
+
+namespace angle
+{
+
+template <typename T>
+Color<T>::Color() : Color(0, 0, 0, 0)
+{
+}
+
+template <typename T>
+constexpr Color<T>::Color(T r, T g, T b, T a) : red(r), green(g), blue(b), alpha(a)
+{
+}
+
+template <typename T>
+bool operator==(const Color<T> &a, const Color<T> &b)
+{
+    return a.red == b.red &&
+           a.green == b.green &&
+           a.blue == b.blue &&
+           a.alpha == b.alpha;
+}
+
+template <typename T>
+bool operator!=(const Color<T> &a, const Color<T> &b)
+{
+    return !(a == b);
+}
+
+
+ColorGeneric::ColorGeneric() : colorF(), type(Type::Float) {}
+
+ColorGeneric::ColorGeneric(const ColorF &color) : colorF(color), type(Type::Float) {}
+
+ColorGeneric::ColorGeneric(const ColorI &color) : colorI(color), type(Type::Int) {}
+
+ColorGeneric::ColorGeneric(const ColorUI &color) : colorUI(color), type(Type::UInt) {}
+
+bool operator==(const ColorGeneric &a, const ColorGeneric &b)
+{
+    if (a.type != b.type)
+    {
+        return false;
+    }
+    switch (a.type)
+    {
+        default:
+        case ColorGeneric::Type::Float:
+            return a.colorF == b.colorF;
+        case ColorGeneric::Type::Int:
+            return a.colorI == b.colorI;
+        case ColorGeneric::Type::UInt:
+            return a.colorUI == b.colorUI;
+    }
+}
+
+bool operator!=(const ColorGeneric &a, const ColorGeneric &b)
+{
+    return !(a == b);
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/FastVector.h b/gfx/angle/checkout/src/common/FastVector.h
new file mode 100644
index 0000000000..6991adf715
--- /dev/null
+++ b/gfx/angle/checkout/src/common/FastVector.h
@@ -0,0 +1,891 @@
+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// FastVector.h:
+//   A vector class with a initial fixed size and variable growth.
+//   Based on FixedVector.
+//
+
+#ifndef COMMON_FASTVECTOR_H_
+#define COMMON_FASTVECTOR_H_
+
+#include "bitset_utils.h"
+#include "common/debug.h"
+
+#include <algorithm>
+#include <array>
+#include <initializer_list>
+#include <iterator>
+
+namespace angle
+{
+
+template <class Iter>
+class WrapIter
+{
+  public:
+    typedef Iter iterator_type;
+    typedef typename std::iterator_traits<iterator_type>::value_type value_type;
+    typedef typename std::iterator_traits<iterator_type>::difference_type difference_type;
+    typedef typename std::iterator_traits<iterator_type>::pointer pointer;
+    typedef typename std::iterator_traits<iterator_type>::reference reference;
+    typedef typename std::iterator_traits<iterator_type>::iterator_category iterator_category;
+
+    WrapIter() : mIter() {}
+    WrapIter(const Iter &iter) : mIter(iter) {}
+    ~WrapIter() = default;
+
+    WrapIter &operator=(const WrapIter &x)
+    {
+        mIter = x.mIter;
+        return *this;
+    }
+
+    bool operator==(const WrapIter &x) const { return mIter == x.mIter; }
+    bool operator!=(const WrapIter &x) const { return mIter != x.mIter; }
+    bool operator<(const WrapIter &x) const { return mIter < x.mIter; }
+    bool operator<=(const WrapIter &x) const { return mIter <= x.mIter; }
+    bool operator>(const WrapIter &x) const { return mIter > x.mIter; }
+    bool operator>=(const WrapIter &x) const { return mIter >= x.mIter; }
+
+    WrapIter &operator++()
+    {
+        mIter++;
+        return *this;
+    }
+
+    WrapIter operator++(int)
+    {
+        WrapIter tmp(mIter);
+        mIter++;
+        return tmp;
+    }
+
+    WrapIter operator+(difference_type n)
+    {
+        WrapIter tmp(mIter);
+        tmp.mIter += n;
+        return tmp;
+    }
+
+    WrapIter operator-(difference_type n)
+    {
+        WrapIter tmp(mIter);
+        tmp.mIter -= n;
+        return tmp;
+    }
+
+    difference_type operator-(const WrapIter &x) const { return mIter - x.mIter; }
+
+    iterator_type operator->() const { return mIter; }
+
+    reference operator*() const { return *mIter; }
+
+  private:
+    iterator_type mIter;
+};
+
+template <class T, size_t N, class Storage = std::array<T, N>>
+class FastVector final
+{
+  public:
+    using value_type      = typename Storage::value_type;
+    using size_type       = typename Storage::size_type;
+    using reference       = typename Storage::reference;
+    using const_reference = typename Storage::const_reference;
+    using pointer         = typename Storage::pointer;
+    using const_pointer   = typename Storage::const_pointer;
+    using iterator        = WrapIter<T *>;
+    using const_iterator  = WrapIter<const T *>;
+
+    FastVector();
+    FastVector(size_type count, const value_type &value);
+    FastVector(size_type count);
+
+    FastVector(const FastVector<T, N, Storage> &other);
+    FastVector(FastVector<T, N, Storage> &&other);
+    FastVector(std::initializer_list<value_type> init);
+
+    template <class InputIt, std::enable_if_t<!std::is_integral<InputIt>::value, bool> = true>
+    FastVector(InputIt first, InputIt last);
+
+    FastVector<T, N, Storage> &operator=(const FastVector<T, N, Storage> &other);
+    FastVector<T, N, Storage> &operator=(FastVector<T, N, Storage> &&other);
+    FastVector<T, N, Storage> &operator=(std::initializer_list<value_type> init);
+
+    ~FastVector();
+
+    reference at(size_type pos);
+    const_reference at(size_type pos) const;
+
+    reference operator[](size_type pos);
+    const_reference operator[](size_type pos) const;
+
+    pointer data();
+    const_pointer data() const;
+
+    iterator begin();
+    const_iterator begin() const;
+
+    iterator end();
+    const_iterator end() const;
+
+    bool empty() const;
+    size_type size() const;
+
+    void clear();
+
+    void push_back(const value_type &value);
+    void push_back(value_type &&value);
+
+    template <typename... Args>
+    void emplace_back(Args &&...args);
+
+    void pop_back();
+
+    reference front();
+    const_reference front() const;
+
+    reference back();
+    const_reference back() const;
+
+    void swap(FastVector<T, N, Storage> &other);
+
+    void resize(size_type count);
+    void resize(size_type count, const value_type &value);
+
+    void reserve(size_type count);
+
+    // Specialty function that removes a known element and might shuffle the list.
+    void remove_and_permute(const value_type &element);
+    void remove_and_permute(iterator pos);
+
+  private:
+    void assign_from_initializer_list(std::initializer_list<value_type> init);
+    void ensure_capacity(size_t capacity);
+    bool uses_fixed_storage() const;
+
+    Storage mFixedStorage;
+    pointer mData           = mFixedStorage.data();
+    size_type mSize         = 0;
+    size_type mReservedSize = N;
+};
+
+template <class T, size_t N, class StorageN, size_t M, class StorageM>
+bool operator==(const FastVector<T, N, StorageN> &a, const FastVector<T, M, StorageM> &b)
+{
+    return a.size() == b.size() && std::equal(a.begin(), a.end(), b.begin());
+}
+
+template <class T, size_t N, class StorageN, size_t M, class StorageM>
+bool operator!=(const FastVector<T, N, StorageN> &a, const FastVector<T, M, StorageM> &b)
+{
+    return !(a == b);
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE bool FastVector<T, N, Storage>::uses_fixed_storage() const
+{
+    return mData == mFixedStorage.data();
+}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage>::FastVector()
+{}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage>::FastVector(size_type count, const value_type &value)
+{
+    ensure_capacity(count);
+    mSize = count;
+    std::fill(begin(), end(), value);
+}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage>::FastVector(size_type count)
+{
+    ensure_capacity(count);
+    mSize = count;
+}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage>::FastVector(const FastVector<T, N, Storage> &other)
+    : FastVector(other.begin(), other.end())
+{}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage>::FastVector(FastVector<T, N, Storage> &&other) : FastVector()
+{
+    swap(other);
+}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage>::FastVector(std::initializer_list<value_type> init)
+{
+    assign_from_initializer_list(init);
+}
+
+template <class T, size_t N, class Storage>
+template <class InputIt, std::enable_if_t<!std::is_integral<InputIt>::value, bool>>
+FastVector<T, N, Storage>::FastVector(InputIt first, InputIt last)
+{
+    size_t newSize = last - first;
+    ensure_capacity(newSize);
+    mSize = newSize;
+    std::copy(first, last, begin());
+}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage> &FastVector<T, N, Storage>::operator=(
+    const FastVector<T, N, Storage> &other)
+{
+    ensure_capacity(other.mSize);
+    mSize = other.mSize;
+    std::copy(other.begin(), other.end(), begin());
+    return *this;
+}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage> &FastVector<T, N, Storage>::operator=(FastVector<T, N, Storage> &&other)
+{
+    swap(other);
+    return *this;
+}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage> &FastVector<T, N, Storage>::operator=(
+    std::initializer_list<value_type> init)
+{
+    assign_from_initializer_list(init);
+    return *this;
+}
+
+template <class T, size_t N, class Storage>
+FastVector<T, N, Storage>::~FastVector()
+{
+    clear();
+    if (!uses_fixed_storage())
+    {
+        delete[] mData;
+    }
+}
+
+template <class T, size_t N, class Storage>
+typename FastVector<T, N, Storage>::reference FastVector<T, N, Storage>::at(size_type pos)
+{
+    ASSERT(pos < mSize);
+    return mData[pos];
+}
+
+template <class T, size_t N, class Storage>
+typename FastVector<T, N, Storage>::const_reference FastVector<T, N, Storage>::at(
+    size_type pos) const
+{
+    ASSERT(pos < mSize);
+    return mData[pos];
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::reference FastVector<T, N, Storage>::operator[](
+    size_type pos)
+{
+    ASSERT(pos < mSize);
+    return mData[pos];
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::const_reference
+FastVector<T, N, Storage>::operator[](size_type pos) const
+{
+    ASSERT(pos < mSize);
+    return mData[pos];
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::const_pointer
+angle::FastVector<T, N, Storage>::data() const
+{
+    return mData;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::pointer angle::FastVector<T, N, Storage>::data()
+{
+    return mData;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::iterator FastVector<T, N, Storage>::begin()
+{
+    return mData;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::const_iterator FastVector<T, N, Storage>::begin()
+    const
+{
+    return mData;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::iterator FastVector<T, N, Storage>::end()
+{
+    return mData + mSize;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::const_iterator FastVector<T, N, Storage>::end()
+    const
+{
+    return mData + mSize;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE bool FastVector<T, N, Storage>::empty() const
+{
+    return mSize == 0;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::size_type FastVector<T, N, Storage>::size() const
+{
+    return mSize;
+}
+
+template <class T, size_t N, class Storage>
+void FastVector<T, N, Storage>::clear()
+{
+    resize(0);
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE void FastVector<T, N, Storage>::push_back(const value_type &value)
+{
+    if (mSize == mReservedSize)
+        ensure_capacity(mSize + 1);
+    mData[mSize++] = value;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE void FastVector<T, N, Storage>::push_back(value_type &&value)
+{
+    emplace_back(std::move(value));
+}
+
+template <class T, size_t N, class Storage>
+template <typename... Args>
+ANGLE_INLINE void FastVector<T, N, Storage>::emplace_back(Args &&...args)
+{
+    if (mSize == mReservedSize)
+        ensure_capacity(mSize + 1);
+    mData[mSize++] = std::move(T(std::forward<Args>(args)...));
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE void FastVector<T, N, Storage>::pop_back()
+{
+    ASSERT(mSize > 0);
+    mSize--;
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::reference FastVector<T, N, Storage>::front()
+{
+    ASSERT(mSize > 0);
+    return mData[0];
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::const_reference FastVector<T, N, Storage>::front()
+    const
+{
+    ASSERT(mSize > 0);
+    return mData[0];
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::reference FastVector<T, N, Storage>::back()
+{
+    ASSERT(mSize > 0);
+    return mData[mSize - 1];
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE typename FastVector<T, N, Storage>::const_reference FastVector<T, N, Storage>::back()
+    const
+{
+    ASSERT(mSize > 0);
+    return mData[mSize - 1];
+}
+
+template <class T, size_t N, class Storage>
+void FastVector<T, N, Storage>::swap(FastVector<T, N, Storage> &other)
+{
+    std::swap(mSize, other.mSize);
+
+    pointer tempData = other.mData;
+    if (uses_fixed_storage())
+        other.mData = other.mFixedStorage.data();
+    else
+        other.mData = mData;
+    if (tempData == other.mFixedStorage.data())
+        mData = mFixedStorage.data();
+    else
+        mData = tempData;
+    std::swap(mReservedSize, other.mReservedSize);
+
+    if (uses_fixed_storage() || other.uses_fixed_storage())
+        std::swap(mFixedStorage, other.mFixedStorage);
+}
+
+template <class T, size_t N, class Storage>
+void FastVector<T, N, Storage>::resize(size_type count)
+{
+    if (count > mSize)
+    {
+        ensure_capacity(count);
+    }
+    mSize = count;
+}
+
+template <class T, size_t N, class Storage>
+void FastVector<T, N, Storage>::resize(size_type count, const value_type &value)
+{
+    if (count > mSize)
+    {
+        ensure_capacity(count);
+        std::fill(mData + mSize, mData + count, value);
+    }
+    mSize = count;
+}
+
+template <class T, size_t N, class Storage>
+void FastVector<T, N, Storage>::reserve(size_type count)
+{
+    ensure_capacity(count);
+}
+
+template <class T, size_t N, class Storage>
+void FastVector<T, N, Storage>::assign_from_initializer_list(std::initializer_list<value_type> init)
+{
+    ensure_capacity(init.size());
+    mSize        = init.size();
+    size_t index = 0;
+    for (auto &value : init)
+    {
+        mData[index++] = value;
+    }
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE void FastVector<T, N, Storage>::remove_and_permute(const value_type &element)
+{
+    size_t len = mSize - 1;
+    for (size_t index = 0; index < len; ++index)
+    {
+        if (mData[index] == element)
+        {
+            mData[index] = std::move(mData[len]);
+            break;
+        }
+    }
+    pop_back();
+}
+
+template <class T, size_t N, class Storage>
+ANGLE_INLINE void FastVector<T, N, Storage>::remove_and_permute(iterator pos)
+{
+    ASSERT(pos >= begin());
+    ASSERT(pos < end());
+    size_t len = mSize - 1;
+    *pos       = std::move(mData[len]);
+    pop_back();
+}
+
+template <class T, size_t N, class Storage>
+void FastVector<T, N, Storage>::ensure_capacity(size_t capacity)
+{
+    // We have a minimum capacity of N.
+    if (mReservedSize < capacity)
+    {
+        ASSERT(capacity > N);
+        size_type newSize = std::max(mReservedSize, N);
+        while (newSize < capacity)
+        {
+            newSize *= 2;
+        }
+
+        pointer newData = new value_type[newSize];
+
+        if (mSize > 0)
+        {
+            std::move(begin(), end(), newData);
+        }
+
+        if (!uses_fixed_storage())
+        {
+            delete[] mData;
+        }
+
+        mData         = newData;
+        mReservedSize = newSize;
+    }
+}
+
+template <class Value, size_t N>
+class FastMap final
+{
+  public:
+    FastMap() {}
+    ~FastMap() {}
+
+    Value &operator[](uint32_t key)
+    {
+        if (mData.size() <= key)
+        {
+            mData.resize(key + 1, {});
+        }
+        return mData[key];
+    }
+
+    const Value &operator[](uint32_t key) const
+    {
+        ASSERT(key < mData.size());
+        return mData[key];
+    }
+
+    void clear() { mData.clear(); }
+
+    bool empty() const { return mData.empty(); }
+    size_t size() const { return mData.size(); }
+
+    const Value *data() const { return mData.data(); }
+
+    bool operator==(const FastMap<Value, N> &other) const
+    {
+        return (size() == other.size()) &&
+               (memcmp(data(), other.data(), size() * sizeof(Value)) == 0);
+    }
+
+  private:
+    FastVector<Value, N> mData;
+};
+
+template <class Key, class Value, size_t N>
+class FlatUnorderedMap final
+{
+  public:
+    using Pair           = std::pair<Key, Value>;
+    using Storage        = FastVector<Pair, N>;
+    using iterator       = typename Storage::iterator;
+    using const_iterator = typename Storage::const_iterator;
+
+    FlatUnorderedMap()  = default;
+    ~FlatUnorderedMap() = default;
+
+    iterator begin() { return mData.begin(); }
+    const_iterator begin() const { return mData.begin(); }
+    iterator end() { return mData.end(); }
+    const_iterator end() const { return mData.end(); }
+
+    iterator find(const Key &key)
+    {
+        for (auto it = mData.begin(); it != mData.end(); ++it)
+        {
+            if (it->first == key)
+            {
+                return it;
+            }
+        }
+        return mData.end();
+    }
+
+    const_iterator find(const Key &key) const
+    {
+        for (auto it = mData.begin(); it != mData.end(); ++it)
+        {
+            if (it->first == key)
+            {
+                return it;
+            }
+        }
+        return mData.end();
+    }
+
+    Value &operator[](const Key &key)
+    {
+        iterator it = find(key);
+        if (it != end())
+        {
+            return it->second;
+        }
+
+        mData.push_back(Pair(key, {}));
+        return mData.back().second;
+    }
+
+    void insert(Pair pair)
+    {
+        ASSERT(!contains(pair.first));
+        mData.push_back(std::move(pair));
+    }
+
+    void insert(const Key &key, Value value) { insert(Pair(key, value)); }
+
+    void erase(iterator pos) { mData.remove_and_permute(pos); }
+
+    bool contains(const Key &key) const { return find(key) != end(); }
+
+    void clear() { mData.clear(); }
+
+    bool get(const Key &key, Value *value) const
+    {
+        auto it = find(key);
+        if (it != end())
+        {
+            *value = it->second;
+            return true;
+        }
+        return false;
+    }
+
+    bool empty() const { return mData.empty(); }
+    size_t size() const { return mData.size(); }
+
+  private:
+    FastVector<Pair, N> mData;
+};
+
+template <class T, size_t N>
+class FlatUnorderedSet final
+{
+  public:
+    using Storage        = FastVector<T, N>;
+    using iterator       = typename Storage::iterator;
+    using const_iterator = typename Storage::const_iterator;
+
+    FlatUnorderedSet()  = default;
+    ~FlatUnorderedSet() = default;
+
+    iterator begin() { return mData.begin(); }
+    const_iterator begin() const { return mData.begin(); }
+    iterator end() { return mData.end(); }
+    const_iterator end() const { return mData.end(); }
+
+    iterator find(const T &value)
+    {
+        for (auto it = mData.begin(); it != mData.end(); ++it)
+        {
+            if (*it == value)
+            {
+                return it;
+            }
+        }
+        return mData.end();
+    }
+
+    const_iterator find(const T &value) const
+    {
+        for (auto it = mData.begin(); it != mData.end(); ++it)
+        {
+            if (*it == value)
+            {
+                return it;
+            }
+        }
+        return mData.end();
+    }
+
+    bool empty() const { return mData.empty(); }
+
+    void insert(const T &value)
+    {
+        ASSERT(!contains(value));
+        mData.push_back(value);
+    }
+
+    void erase(const T &value)
+    {
+        ASSERT(contains(value));
+        mData.remove_and_permute(value);
+    }
+
+    void remove(const T &value) { erase(value); }
+
+    bool contains(const T &value) const { return find(value) != end(); }
+
+    void clear() { mData.clear(); }
+
+    bool operator==(const FlatUnorderedSet<T, N> &other) const { return mData == other.mData; }
+
+  private:
+    Storage mData;
+};
+
+class FastIntegerSet final
+{
+  public:
+    static constexpr size_t kWindowSize             = 64;
+    static constexpr size_t kOneLessThanKWindowSize = kWindowSize - 1;
+    static constexpr size_t kShiftForDivision =
+        static_cast<size_t>(rx::Log2(static_cast<unsigned int>(kWindowSize)));
+    using KeyBitSet = angle::BitSet64<kWindowSize>;
+
+    ANGLE_INLINE FastIntegerSet();
+    ANGLE_INLINE ~FastIntegerSet();
+
+    ANGLE_INLINE void ensureCapacity(size_t size)
+    {
+        if (capacity() <= size)
+        {
+            reserve(size * 2);
+        }
+    }
+
+    ANGLE_INLINE void insert(uint64_t key)
+    {
+        size_t sizedKey = static_cast<size_t>(key);
+
+        ASSERT(!contains(sizedKey));
+        ensureCapacity(sizedKey);
+        ASSERT(capacity() > sizedKey);
+
+        size_t index  = sizedKey >> kShiftForDivision;
+        size_t offset = sizedKey & kOneLessThanKWindowSize;
+
+        mKeyData[index].set(offset, true);
+    }
+
+    ANGLE_INLINE bool contains(uint64_t key) const
+    {
+        size_t sizedKey = static_cast<size_t>(key);
+
+        size_t index  = sizedKey >> kShiftForDivision;
+        size_t offset = sizedKey & kOneLessThanKWindowSize;
+
+        return (sizedKey < capacity()) && (mKeyData[index].test(offset));
+    }
+
+    ANGLE_INLINE void clear()
+    {
+        for (KeyBitSet &it : mKeyData)
+        {
+            it.reset();
+        }
+    }
+
+    ANGLE_INLINE bool empty() const
+    {
+        for (const KeyBitSet &it : mKeyData)
+        {
+            if (it.any())
+            {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    ANGLE_INLINE size_t size() const
+    {
+        size_t valid_entries = 0;
+        for (const KeyBitSet &it : mKeyData)
+        {
+            valid_entries += it.count();
+        }
+        return valid_entries;
+    }
+
+  private:
+    ANGLE_INLINE size_t capacity() const { return kWindowSize * mKeyData.size(); }
+
+    ANGLE_INLINE void reserve(size_t newSize)
+    {
+        size_t alignedSize = rx::roundUpPow2(newSize, kWindowSize);
+        size_t count       = alignedSize >> kShiftForDivision;
+
+        mKeyData.resize(count, KeyBitSet::Zero());
+    }
+
+    std::vector<KeyBitSet> mKeyData;
+};
+
+// This is needed to accommodate the chromium style guide error -
+//      [chromium-style] Complex constructor has an inlined body.
+ANGLE_INLINE FastIntegerSet::FastIntegerSet() {}
+ANGLE_INLINE FastIntegerSet::~FastIntegerSet() {}
+
+template <typename Value>
+class FastIntegerMap final
+{
+  public:
+    FastIntegerMap() {}
+    ~FastIntegerMap() {}
+
+    ANGLE_INLINE void ensureCapacity(size_t size)
+    {
+        // Ensure key set has capacity
+        mKeySet.ensureCapacity(size);
+
+        // Ensure value vector has capacity
+        ensureCapacityImpl(size);
+    }
+
+    ANGLE_INLINE void insert(uint64_t key, Value value)
+    {
+        // Insert key
+        ASSERT(!mKeySet.contains(key));
+        mKeySet.insert(key);
+
+        // Insert value
+        size_t sizedKey = static_cast<size_t>(key);
+        ensureCapacityImpl(sizedKey);
+        ASSERT(capacity() > sizedKey);
+        mValueData[sizedKey] = value;
+    }
+
+    ANGLE_INLINE bool contains(uint64_t key) const { return mKeySet.contains(key); }
+
+    ANGLE_INLINE bool get(uint64_t key, Value *out) const
+    {
+        if (!mKeySet.contains(key))
+        {
+            return false;
+        }
+
+        size_t sizedKey = static_cast<size_t>(key);
+        *out            = mValueData[sizedKey];
+        return true;
+    }
+
+    ANGLE_INLINE void clear() { mKeySet.clear(); }
+
+    ANGLE_INLINE bool empty() const { return mKeySet.empty(); }
+
+    ANGLE_INLINE size_t size() const { return mKeySet.size(); }
+
+  private:
+    ANGLE_INLINE size_t capacity() const { return mValueData.size(); }
+
+    ANGLE_INLINE void ensureCapacityImpl(size_t size)
+    {
+        if (capacity() <= size)
+        {
+            reserve(size * 2);
+        }
+    }
+
+    ANGLE_INLINE void reserve(size_t newSize)
+    {
+        size_t alignedSize = rx::roundUpPow2(newSize, FastIntegerSet::kWindowSize);
+        mValueData.resize(alignedSize);
+    }
+
+    FastIntegerSet mKeySet;
+    std::vector<Value> mValueData;
+};
+}  // namespace angle
+
+#endif  // COMMON_FASTVECTOR_H_
diff --git a/gfx/angle/checkout/src/common/FixedVector.h b/gfx/angle/checkout/src/common/FixedVector.h
new file mode 100644
index 0000000000..bff87fc969
--- /dev/null
+++ b/gfx/angle/checkout/src/common/FixedVector.h
@@ -0,0 +1,353 @@
+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// FixedVector.h:
+//   A vector class with a maximum size and fixed storage.
+//
+
+#ifndef COMMON_FIXEDVECTOR_H_
+#define COMMON_FIXEDVECTOR_H_
+
+#include "common/debug.h"
+
+#include <algorithm>
+#include <array>
+#include <initializer_list>
+
+namespace angle
+{
+template <class T, size_t N, class Storage = std::array<T, N>>
+class FixedVector final
+{
+  public:
+    using value_type             = typename Storage::value_type;
+    using size_type              = typename Storage::size_type;
+    using reference              = typename Storage::reference;
+    using const_reference        = typename Storage::const_reference;
+    using pointer                = typename Storage::pointer;
+    using const_pointer          = typename Storage::const_pointer;
+    using iterator               = typename Storage::iterator;
+    using const_iterator         = typename Storage::const_iterator;
+    using reverse_iterator       = typename Storage::reverse_iterator;
+    using const_reverse_iterator = typename Storage::const_reverse_iterator;
+
+    FixedVector();
+    FixedVector(size_type count, const value_type &value);
+    FixedVector(size_type count);
+
+    FixedVector(const FixedVector<T, N, Storage> &other);
+    FixedVector(FixedVector<T, N, Storage> &&other);
+    FixedVector(std::initializer_list<value_type> init);
+
+    FixedVector<T, N, Storage> &operator=(const FixedVector<T, N, Storage> &other);
+    FixedVector<T, N, Storage> &operator=(FixedVector<T, N, Storage> &&other);
+    FixedVector<T, N, Storage> &operator=(std::initializer_list<value_type> init);
+
+    ~FixedVector();
+
+    reference at(size_type pos);
+    const_reference at(size_type pos) const;
+
+    reference operator[](size_type pos);
+    const_reference operator[](size_type pos) const;
+
+    pointer data();
+    const_pointer data() const;
+
+    iterator begin();
+    const_iterator begin() const;
+
+    iterator end();
+    const_iterator end() const;
+
+    bool empty() const;
+    size_type size() const;
+    static constexpr size_type max_size();
+
+    void clear();
+
+    void push_back(const value_type &value);
+    void push_back(value_type &&value);
+
+    template <class... Args>
+    void emplace_back(Args &&... args);
+
+    void pop_back();
+    reference back();
+    const_reference back() const;
+
+    void swap(FixedVector<T, N, Storage> &other);
+
+    void resize(size_type count);
+    void resize(size_type count, const value_type &value);
+
+    bool full() const;
+
+  private:
+    void assign_from_initializer_list(std::initializer_list<value_type> init);
+
+    Storage mStorage;
+    size_type mSize = 0;
+};
+
+template <class T, size_t N, class Storage>
+bool operator==(const FixedVector<T, N, Storage> &a, const FixedVector<T, N, Storage> &b)
+{
+    return a.size() == b.size() && std::equal(a.begin(), a.end(), b.begin());
+}
+
+template <class T, size_t N, class Storage>
+bool operator!=(const FixedVector<T, N, Storage> &a, const FixedVector<T, N, Storage> &b)
+{
+    return !(a == b);
+}
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage>::FixedVector() = default;
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage>::FixedVector(size_type count, const value_type &value) : mSize(count)
+{
+    ASSERT(count <= N);
+    std::fill(mStorage.begin(), mStorage.begin() + count, value);
+}
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage>::FixedVector(size_type count) : mSize(count)
+{
+    ASSERT(count <= N);
+}
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage>::FixedVector(const FixedVector<T, N, Storage> &other) = default;
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage>::FixedVector(FixedVector<T, N, Storage> &&other) = default;
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage>::FixedVector(std::initializer_list<value_type> init)
+{
+    ASSERT(init.size() <= N);
+    assign_from_initializer_list(init);
+}
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage> &FixedVector<T, N, Storage>::operator=(
+    const FixedVector<T, N, Storage> &other) = default;
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage> &FixedVector<T, N, Storage>::operator=(
+    FixedVector<T, N, Storage> &&other) = default;
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage> &FixedVector<T, N, Storage>::operator=(
+    std::initializer_list<value_type> init)
+{
+    clear();
+    ASSERT(init.size() <= N);
+    assign_from_initializer_list(init);
+    return this;
+}
+
+template <class T, size_t N, class Storage>
+FixedVector<T, N, Storage>::~FixedVector()
+{
+    clear();
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::reference FixedVector<T, N, Storage>::at(size_type pos)
+{
+    ASSERT(pos < N);
+    return mStorage.at(pos);
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::const_reference FixedVector<T, N, Storage>::at(
+    size_type pos) const
+{
+    ASSERT(pos < N);
+    return mStorage.at(pos);
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::reference FixedVector<T, N, Storage>::operator[](size_type pos)
+{
+    ASSERT(pos < N);
+    return mStorage[pos];
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::const_reference FixedVector<T, N, Storage>::operator[](
+    size_type pos) const
+{
+    ASSERT(pos < N);
+    return mStorage[pos];
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::const_pointer angle::FixedVector<T, N, Storage>::data() const
+{
+    return mStorage.data();
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::pointer angle::FixedVector<T, N, Storage>::data()
+{
+    return mStorage.data();
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::iterator FixedVector<T, N, Storage>::begin()
+{
+    return mStorage.begin();
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::const_iterator FixedVector<T, N, Storage>::begin() const
+{
+    return mStorage.begin();
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::iterator FixedVector<T, N, Storage>::end()
+{
+    return mStorage.begin() + mSize;
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::const_iterator FixedVector<T, N, Storage>::end() const
+{
+    return mStorage.begin() + mSize;
+}
+
+template <class T, size_t N, class Storage>
+bool FixedVector<T, N, Storage>::empty() const
+{
+    return mSize == 0;
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::size_type FixedVector<T, N, Storage>::size() const
+{
+    return mSize;
+}
+
+template <class T, size_t N, class Storage>
+constexpr typename FixedVector<T, N, Storage>::size_type FixedVector<T, N, Storage>::max_size()
+{
+    return N;
+}
+
+template <class T, size_t N, class Storage>
+void FixedVector<T, N, Storage>::clear()
+{
+    resize(0);
+}
+
+template <class T, size_t N, class Storage>
+void FixedVector<T, N, Storage>::push_back(const value_type &value)
+{
+    ASSERT(mSize < N);
+    mStorage[mSize] = value;
+    mSize++;
+}
+
+template <class T, size_t N, class Storage>
+void FixedVector<T, N, Storage>::push_back(value_type &&value)
+{
+    ASSERT(mSize < N);
+    mStorage[mSize] = std::move(value);
+    mSize++;
+}
+
+template <class T, size_t N, class Storage>
+template <class... Args>
+void FixedVector<T, N, Storage>::emplace_back(Args &&... args)
+{
+    ASSERT(mSize < N);
+    new (&mStorage[mSize]) T{std::forward<Args>(args)...};
+    mSize++;
+}
+
+template <class T, size_t N, class Storage>
+void FixedVector<T, N, Storage>::pop_back()
+{
+    ASSERT(mSize > 0);
+    mSize--;
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::reference FixedVector<T, N, Storage>::back()
+{
+    ASSERT(mSize > 0);
+    return mStorage[mSize - 1];
+}
+
+template <class T, size_t N, class Storage>
+typename FixedVector<T, N, Storage>::const_reference FixedVector<T, N, Storage>::back() const
+{
+    ASSERT(mSize > 0);
+    return mStorage[mSize - 1];
+}
+
+template <class T, size_t N, class Storage>
+void FixedVector<T, N, Storage>::swap(FixedVector<T, N, Storage> &other)
+{
+    std::swap(mSize, other.mSize);
+    std::swap(mStorage, other.mStorage);
+}
+
+template <class T, size_t N, class Storage>
+void FixedVector<T, N, Storage>::resize(size_type count)
+{
+    ASSERT(count <= N);
+    while (mSize > count)
+    {
+        mSize--;
+        mStorage[mSize] = value_type();
+    }
+    while (mSize < count)
+    {
+        mStorage[mSize] = value_type();
+        mSize++;
+    }
+}
+
+template <class T, size_t N, class Storage>
+void FixedVector<T, N, Storage>::resize(size_type count, const value_type &value)
+{
+    ASSERT(count <= N);
+    while (mSize > count)
+    {
+        mSize--;
+        mStorage[mSize] = value_type();
+    }
+    while (mSize < count)
+    {
+        mStorage[mSize] = value;
+        mSize++;
+    }
+}
+
+template <class T, size_t N, class Storage>
+void FixedVector<T, N, Storage>::assign_from_initializer_list(
+    std::initializer_list<value_type> init)
+{
+    for (auto element : init)
+    {
+        mStorage[mSize] = std::move(element);
+        mSize++;
+    }
+}
+
+template <class T, size_t N, class Storage>
+bool FixedVector<T, N, Storage>::full() const
+{
+    return (mSize == N);
+}
+}  // namespace angle
+
+#endif  // COMMON_FIXEDVECTOR_H_
diff --git a/gfx/angle/checkout/src/common/Float16ToFloat32.cpp b/gfx/angle/checkout/src/common/Float16ToFloat32.cpp
new file mode 100644
index 0000000000..f9dfe23307
--- /dev/null
+++ b/gfx/angle/checkout/src/common/Float16ToFloat32.cpp
@@ -0,0 +1,300 @@
+//
+// Copyright 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// This file is automatically generated.
+
+#include "common/mathutil.h"
+
+namespace gl
+{
+
+const static unsigned g_mantissa[2048] = {
+    0x00000000, 0x33800000, 0x34000000, 0x34400000, 0x34800000, 0x34a00000, 0x34c00000, 0x34e00000,
+    0x35000000, 0x35100000, 0x35200000, 0x35300000, 0x35400000, 0x35500000, 0x35600000, 0x35700000,
+    0x35800000, 0x35880000, 0x35900000, 0x35980000, 0x35a00000, 0x35a80000, 0x35b00000, 0x35b80000,
+    0x35c00000, 0x35c80000, 0x35d00000, 0x35d80000, 0x35e00000, 0x35e80000, 0x35f00000, 0x35f80000,
+    0x36000000, 0x36040000, 0x36080000, 0x360c0000, 0x36100000, 0x36140000, 0x36180000, 0x361c0000,
+    0x36200000, 0x36240000, 0x36280000, 0x362c0000, 0x36300000, 0x36340000, 0x36380000, 0x363c0000,
+    0x36400000, 0x36440000, 0x36480000, 0x364c0000, 0x36500000, 0x36540000, 0x36580000, 0x365c0000,
+    0x36600000, 0x36640000, 0x36680000, 0x366c0000, 0x36700000, 0x36740000, 0x36780000, 0x367c0000,
+    0x36800000, 0x36820000, 0x36840000, 0x36860000, 0x36880000, 0x368a0000, 0x368c0000, 0x368e0000,
+    0x36900000, 0x36920000, 0x36940000, 0x36960000, 0x36980000, 0x369a0000, 0x369c0000, 0x369e0000,
+    0x36a00000, 0x36a20000, 0x36a40000, 0x36a60000, 0x36a80000, 0x36aa0000, 0x36ac0000, 0x36ae0000,
+    0x36b00000, 0x36b20000, 0x36b40000, 0x36b60000, 0x36b80000, 0x36ba0000, 0x36bc0000, 0x36be0000,
+    0x36c00000, 0x36c20000, 0x36c40000, 0x36c60000, 0x36c80000, 0x36ca0000, 0x36cc0000, 0x36ce0000,
+    0x36d00000, 0x36d20000, 0x36d40000, 0x36d60000, 0x36d80000, 0x36da0000, 0x36dc0000, 0x36de0000,
+    0x36e00000, 0x36e20000, 0x36e40000, 0x36e60000, 0x36e80000, 0x36ea0000, 0x36ec0000, 0x36ee0000,
+    0x36f00000, 0x36f20000, 0x36f40000, 0x36f60000, 0x36f80000, 0x36fa0000, 0x36fc0000, 0x36fe0000,
+    0x37000000, 0x37010000, 0x37020000, 0x37030000, 0x37040000, 0x37050000, 0x37060000, 0x37070000,
+    0x37080000, 0x37090000, 0x370a0000, 0x370b0000, 0x370c0000, 0x370d0000, 0x370e0000, 0x370f0000,
+    0x37100000, 0x37110000, 0x37120000, 0x37130000, 0x37140000, 0x37150000, 0x37160000, 0x37170000,
+    0x37180000, 0x37190000, 0x371a0000, 0x371b0000, 0x371c0000, 0x371d0000, 0x371e0000, 0x371f0000,
+    0x37200000, 0x37210000, 0x37220000, 0x37230000, 0x37240000, 0x37250000, 0x37260000, 0x37270000,
+    0x37280000, 0x37290000, 0x372a0000, 0x372b0000, 0x372c0000, 0x372d0000, 0x372e0000, 0x372f0000,
+    0x37300000, 0x37310000, 0x37320000, 0x37330000, 0x37340000, 0x37350000, 0x37360000, 0x37370000,
+    0x37380000, 0x37390000, 0x373a0000, 0x373b0000, 0x373c0000, 0x373d0000, 0x373e0000, 0x373f0000,
+    0x37400000, 0x37410000, 0x37420000, 0x37430000, 0x37440000, 0x37450000, 0x37460000, 0x37470000,
+    0x37480000, 0x37490000, 0x374a0000, 0x374b0000, 0x374c0000, 0x374d0000, 0x374e0000, 0x374f0000,
+    0x37500000, 0x37510000, 0x37520000, 0x37530000, 0x37540000, 0x37550000, 0x37560000, 0x37570000,
+    0x37580000, 0x37590000, 0x375a0000, 0x375b0000, 0x375c0000, 0x375d0000, 0x375e0000, 0x375f0000,
+    0x37600000, 0x37610000, 0x37620000, 0x37630000, 0x37640000, 0x37650000, 0x37660000, 0x37670000,
+    0x37680000, 0x37690000, 0x376a0000, 0x376b0000, 0x376c0000, 0x376d0000, 0x376e0000, 0x376f0000,
+    0x37700000, 0x37710000, 0x37720000, 0x37730000, 0x37740000, 0x37750000, 0x37760000, 0x37770000,
+    0x37780000, 0x37790000, 0x377a0000, 0x377b0000, 0x377c0000, 0x377d0000, 0x377e0000, 0x377f0000,
+    0x37800000, 0x37808000, 0x37810000, 0x37818000, 0x37820000, 0x37828000, 0x37830000, 0x37838000,
+    0x37840000, 0x37848000, 0x37850000, 0x37858000, 0x37860000, 0x37868000, 0x37870000, 0x37878000,
+    0x37880000, 0x37888000, 0x37890000, 0x37898000, 0x378a0000, 0x378a8000, 0x378b0000, 0x378b8000,
+    0x378c0000, 0x378c8000, 0x378d0000, 0x378d8000, 0x378e0000, 0x378e8000, 0x378f0000, 0x378f8000,
+    0x37900000, 0x37908000, 0x37910000, 0x37918000, 0x37920000, 0x37928000, 0x37930000, 0x37938000,
+    0x37940000, 0x37948000, 0x37950000, 0x37958000, 0x37960000, 0x37968000, 0x37970000, 0x37978000,
+    0x37980000, 0x37988000, 0x37990000, 0x37998000, 0x379a0000, 0x379a8000, 0x379b0000, 0x379b8000,
+    0x379c0000, 0x379c8000, 0x379d0000, 0x379d8000, 0x379e0000, 0x379e8000, 0x379f0000, 0x379f8000,
+    0x37a00000, 0x37a08000, 0x37a10000, 0x37a18000, 0x37a20000, 0x37a28000, 0x37a30000, 0x37a38000,
+    0x37a40000, 0x37a48000, 0x37a50000, 0x37a58000, 0x37a60000, 0x37a68000, 0x37a70000, 0x37a78000,
+    0x37a80000, 0x37a88000, 0x37a90000, 0x37a98000, 0x37aa0000, 0x37aa8000, 0x37ab0000, 0x37ab8000,
+    0x37ac0000, 0x37ac8000, 0x37ad0000, 0x37ad8000, 0x37ae0000, 0x37ae8000, 0x37af0000, 0x37af8000,
+    0x37b00000, 0x37b08000, 0x37b10000, 0x37b18000, 0x37b20000, 0x37b28000, 0x37b30000, 0x37b38000,
+    0x37b40000, 0x37b48000, 0x37b50000, 0x37b58000, 0x37b60000, 0x37b68000, 0x37b70000, 0x37b78000,
+    0x37b80000, 0x37b88000, 0x37b90000, 0x37b98000, 0x37ba0000, 0x37ba8000, 0x37bb0000, 0x37bb8000,
+    0x37bc0000, 0x37bc8000, 0x37bd0000, 0x37bd8000, 0x37be0000, 0x37be8000, 0x37bf0000, 0x37bf8000,
+    0x37c00000, 0x37c08000, 0x37c10000, 0x37c18000, 0x37c20000, 0x37c28000, 0x37c30000, 0x37c38000,
+    0x37c40000, 0x37c48000, 0x37c50000, 0x37c58000, 0x37c60000, 0x37c68000, 0x37c70000, 0x37c78000,
+    0x37c80000, 0x37c88000, 0x37c90000, 0x37c98000, 0x37ca0000, 0x37ca8000, 0x37cb0000, 0x37cb8000,
+    0x37cc0000, 0x37cc8000, 0x37cd0000, 0x37cd8000, 0x37ce0000, 0x37ce8000, 0x37cf0000, 0x37cf8000,
+    0x37d00000, 0x37d08000, 0x37d10000, 0x37d18000, 0x37d20000, 0x37d28000, 0x37d30000, 0x37d38000,
+    0x37d40000, 0x37d48000, 0x37d50000, 0x37d58000, 0x37d60000, 0x37d68000, 0x37d70000, 0x37d78000,
+    0x37d80000, 0x37d88000, 0x37d90000, 0x37d98000, 0x37da0000, 0x37da8000, 0x37db0000, 0x37db8000,
+    0x37dc0000, 0x37dc8000, 0x37dd0000, 0x37dd8000, 0x37de0000, 0x37de8000, 0x37df0000, 0x37df8000,
+    0x37e00000, 0x37e08000, 0x37e10000, 0x37e18000, 0x37e20000, 0x37e28000, 0x37e30000, 0x37e38000,
+    0x37e40000, 0x37e48000, 0x37e50000, 0x37e58000, 0x37e60000, 0x37e68000, 0x37e70000, 0x37e78000,
+    0x37e80000, 0x37e88000, 0x37e90000, 0x37e98000, 0x37ea0000, 0x37ea8000, 0x37eb0000, 0x37eb8000,
+    0x37ec0000, 0x37ec8000, 0x37ed0000, 0x37ed8000, 0x37ee0000, 0x37ee8000, 0x37ef0000, 0x37ef8000,
+    0x37f00000, 0x37f08000, 0x37f10000, 0x37f18000, 0x37f20000, 0x37f28000, 0x37f30000, 0x37f38000,
+    0x37f40000, 0x37f48000, 0x37f50000, 0x37f58000, 0x37f60000, 0x37f68000, 0x37f70000, 0x37f78000,
+    0x37f80000, 0x37f88000, 0x37f90000, 0x37f98000, 0x37fa0000, 0x37fa8000, 0x37fb0000, 0x37fb8000,
+    0x37fc0000, 0x37fc8000, 0x37fd0000, 0x37fd8000, 0x37fe0000, 0x37fe8000, 0x37ff0000, 0x37ff8000,
+    0x38000000, 0x38004000, 0x38008000, 0x3800c000, 0x38010000, 0x38014000, 0x38018000, 0x3801c000,
+    0x38020000, 0x38024000, 0x38028000, 0x3802c000, 0x38030000, 0x38034000, 0x38038000, 0x3803c000,
+    0x38040000, 0x38044000, 0x38048000, 0x3804c000, 0x38050000, 0x38054000, 0x38058000, 0x3805c000,
+    0x38060000, 0x38064000, 0x38068000, 0x3806c000, 0x38070000, 0x38074000, 0x38078000, 0x3807c000,
+    0x38080000, 0x38084000, 0x38088000, 0x3808c000, 0x38090000, 0x38094000, 0x38098000, 0x3809c000,
+    0x380a0000, 0x380a4000, 0x380a8000, 0x380ac000, 0x380b0000, 0x380b4000, 0x380b8000, 0x380bc000,
+    0x380c0000, 0x380c4000, 0x380c8000, 0x380cc000, 0x380d0000, 0x380d4000, 0x380d8000, 0x380dc000,
+    0x380e0000, 0x380e4000, 0x380e8000, 0x380ec000, 0x380f0000, 0x380f4000, 0x380f8000, 0x380fc000,
+    0x38100000, 0x38104000, 0x38108000, 0x3810c000, 0x38110000, 0x38114000, 0x38118000, 0x3811c000,
+    0x38120000, 0x38124000, 0x38128000, 0x3812c000, 0x38130000, 0x38134000, 0x38138000, 0x3813c000,
+    0x38140000, 0x38144000, 0x38148000, 0x3814c000, 0x38150000, 0x38154000, 0x38158000, 0x3815c000,
+    0x38160000, 0x38164000, 0x38168000, 0x3816c000, 0x38170000, 0x38174000, 0x38178000, 0x3817c000,
+    0x38180000, 0x38184000, 0x38188000, 0x3818c000, 0x38190000, 0x38194000, 0x38198000, 0x3819c000,
+    0x381a0000, 0x381a4000, 0x381a8000, 0x381ac000, 0x381b0000, 0x381b4000, 0x381b8000, 0x381bc000,
+    0x381c0000, 0x381c4000, 0x381c8000, 0x381cc000, 0x381d0000, 0x381d4000, 0x381d8000, 0x381dc000,
+    0x381e0000, 0x381e4000, 0x381e8000, 0x381ec000, 0x381f0000, 0x381f4000, 0x381f8000, 0x381fc000,
+    0x38200000, 0x38204000, 0x38208000, 0x3820c000, 0x38210000, 0x38214000, 0x38218000, 0x3821c000,
+    0x38220000, 0x38224000, 0x38228000, 0x3822c000, 0x38230000, 0x38234000, 0x38238000, 0x3823c000,
+    0x38240000, 0x38244000, 0x38248000, 0x3824c000, 0x38250000, 0x38254000, 0x38258000, 0x3825c000,
+    0x38260000, 0x38264000, 0x38268000, 0x3826c000, 0x38270000, 0x38274000, 0x38278000, 0x3827c000,
+    0x38280000, 0x38284000, 0x38288000, 0x3828c000, 0x38290000, 0x38294000, 0x38298000, 0x3829c000,
+    0x382a0000, 0x382a4000, 0x382a8000, 0x382ac000, 0x382b0000, 0x382b4000, 0x382b8000, 0x382bc000,
+    0x382c0000, 0x382c4000, 0x382c8000, 0x382cc000, 0x382d0000, 0x382d4000, 0x382d8000, 0x382dc000,
+    0x382e0000, 0x382e4000, 0x382e8000, 0x382ec000, 0x382f0000, 0x382f4000, 0x382f8000, 0x382fc000,
+    0x38300000, 0x38304000, 0x38308000, 0x3830c000, 0x38310000, 0x38314000, 0x38318000, 0x3831c000,
+    0x38320000, 0x38324000, 0x38328000, 0x3832c000, 0x38330000, 0x38334000, 0x38338000, 0x3833c000,
+    0x38340000, 0x38344000, 0x38348000, 0x3834c000, 0x38350000, 0x38354000, 0x38358000, 0x3835c000,
+    0x38360000, 0x38364000, 0x38368000, 0x3836c000, 0x38370000, 0x38374000, 0x38378000, 0x3837c000,
+    0x38380000, 0x38384000, 0x38388000, 0x3838c000, 0x38390000, 0x38394000, 0x38398000, 0x3839c000,
+    0x383a0000, 0x383a4000, 0x383a8000, 0x383ac000, 0x383b0000, 0x383b4000, 0x383b8000, 0x383bc000,
+    0x383c0000, 0x383c4000, 0x383c8000, 0x383cc000, 0x383d0000, 0x383d4000, 0x383d8000, 0x383dc000,
+    0x383e0000, 0x383e4000, 0x383e8000, 0x383ec000, 0x383f0000, 0x383f4000, 0x383f8000, 0x383fc000,
+    0x38400000, 0x38404000, 0x38408000, 0x3840c000, 0x38410000, 0x38414000, 0x38418000, 0x3841c000,
+    0x38420000, 0x38424000, 0x38428000, 0x3842c000, 0x38430000, 0x38434000, 0x38438000, 0x3843c000,
+    0x38440000, 0x38444000, 0x38448000, 0x3844c000, 0x38450000, 0x38454000, 0x38458000, 0x3845c000,
+    0x38460000, 0x38464000, 0x38468000, 0x3846c000, 0x38470000, 0x38474000, 0x38478000, 0x3847c000,
+    0x38480000, 0x38484000, 0x38488000, 0x3848c000, 0x38490000, 0x38494000, 0x38498000, 0x3849c000,
+    0x384a0000, 0x384a4000, 0x384a8000, 0x384ac000, 0x384b0000, 0x384b4000, 0x384b8000, 0x384bc000,
+    0x384c0000, 0x384c4000, 0x384c8000, 0x384cc000, 0x384d0000, 0x384d4000, 0x384d8000, 0x384dc000,
+    0x384e0000, 0x384e4000, 0x384e8000, 0x384ec000, 0x384f0000, 0x384f4000, 0x384f8000, 0x384fc000,
+    0x38500000, 0x38504000, 0x38508000, 0x3850c000, 0x38510000, 0x38514000, 0x38518000, 0x3851c000,
+    0x38520000, 0x38524000, 0x38528000, 0x3852c000, 0x38530000, 0x38534000, 0x38538000, 0x3853c000,
+    0x38540000, 0x38544000, 0x38548000, 0x3854c000, 0x38550000, 0x38554000, 0x38558000, 0x3855c000,
+    0x38560000, 0x38564000, 0x38568000, 0x3856c000, 0x38570000, 0x38574000, 0x38578000, 0x3857c000,
+    0x38580000, 0x38584000, 0x38588000, 0x3858c000, 0x38590000, 0x38594000, 0x38598000, 0x3859c000,
+    0x385a0000, 0x385a4000, 0x385a8000, 0x385ac000, 0x385b0000, 0x385b4000, 0x385b8000, 0x385bc000,
+    0x385c0000, 0x385c4000, 0x385c8000, 0x385cc000, 0x385d0000, 0x385d4000, 0x385d8000, 0x385dc000,
+    0x385e0000, 0x385e4000, 0x385e8000, 0x385ec000, 0x385f0000, 0x385f4000, 0x385f8000, 0x385fc000,
+    0x38600000, 0x38604000, 0x38608000, 0x3860c000, 0x38610000, 0x38614000, 0x38618000, 0x3861c000,
+    0x38620000, 0x38624000, 0x38628000, 0x3862c000, 0x38630000, 0x38634000, 0x38638000, 0x3863c000,
+    0x38640000, 0x38644000, 0x38648000, 0x3864c000, 0x38650000, 0x38654000, 0x38658000, 0x3865c000,
+    0x38660000, 0x38664000, 0x38668000, 0x3866c000, 0x38670000, 0x38674000, 0x38678000, 0x3867c000,
+    0x38680000, 0x38684000, 0x38688000, 0x3868c000, 0x38690000, 0x38694000, 0x38698000, 0x3869c000,
+    0x386a0000, 0x386a4000, 0x386a8000, 0x386ac000, 0x386b0000, 0x386b4000, 0x386b8000, 0x386bc000,
+    0x386c0000, 0x386c4000, 0x386c8000, 0x386cc000, 0x386d0000, 0x386d4000, 0x386d8000, 0x386dc000,
+    0x386e0000, 0x386e4000, 0x386e8000, 0x386ec000, 0x386f0000, 0x386f4000, 0x386f8000, 0x386fc000,
+    0x38700000, 0x38704000, 0x38708000, 0x3870c000, 0x38710000, 0x38714000, 0x38718000, 0x3871c000,
+    0x38720000, 0x38724000, 0x38728000, 0x3872c000, 0x38730000, 0x38734000, 0x38738000, 0x3873c000,
+    0x38740000, 0x38744000, 0x38748000, 0x3874c000, 0x38750000, 0x38754000, 0x38758000, 0x3875c000,
+    0x38760000, 0x38764000, 0x38768000, 0x3876c000, 0x38770000, 0x38774000, 0x38778000, 0x3877c000,
+    0x38780000, 0x38784000, 0x38788000, 0x3878c000, 0x38790000, 0x38794000, 0x38798000, 0x3879c000,
+    0x387a0000, 0x387a4000, 0x387a8000, 0x387ac000, 0x387b0000, 0x387b4000, 0x387b8000, 0x387bc000,
+    0x387c0000, 0x387c4000, 0x387c8000, 0x387cc000, 0x387d0000, 0x387d4000, 0x387d8000, 0x387dc000,
+    0x387e0000, 0x387e4000, 0x387e8000, 0x387ec000, 0x387f0000, 0x387f4000, 0x387f8000, 0x387fc000,
+    0x38000000, 0x38002000, 0x38004000, 0x38006000, 0x38008000, 0x3800a000, 0x3800c000, 0x3800e000,
+    0x38010000, 0x38012000, 0x38014000, 0x38016000, 0x38018000, 0x3801a000, 0x3801c000, 0x3801e000,
+    0x38020000, 0x38022000, 0x38024000, 0x38026000, 0x38028000, 0x3802a000, 0x3802c000, 0x3802e000,
+    0x38030000, 0x38032000, 0x38034000, 0x38036000, 0x38038000, 0x3803a000, 0x3803c000, 0x3803e000,
+    0x38040000, 0x38042000, 0x38044000, 0x38046000, 0x38048000, 0x3804a000, 0x3804c000, 0x3804e000,
+    0x38050000, 0x38052000, 0x38054000, 0x38056000, 0x38058000, 0x3805a000, 0x3805c000, 0x3805e000,
+    0x38060000, 0x38062000, 0x38064000, 0x38066000, 0x38068000, 0x3806a000, 0x3806c000, 0x3806e000,
+    0x38070000, 0x38072000, 0x38074000, 0x38076000, 0x38078000, 0x3807a000, 0x3807c000, 0x3807e000,
+    0x38080000, 0x38082000, 0x38084000, 0x38086000, 0x38088000, 0x3808a000, 0x3808c000, 0x3808e000,
+    0x38090000, 0x38092000, 0x38094000, 0x38096000, 0x38098000, 0x3809a000, 0x3809c000, 0x3809e000,
+    0x380a0000, 0x380a2000, 0x380a4000, 0x380a6000, 0x380a8000, 0x380aa000, 0x380ac000, 0x380ae000,
+    0x380b0000, 0x380b2000, 0x380b4000, 0x380b6000, 0x380b8000, 0x380ba000, 0x380bc000, 0x380be000,
+    0x380c0000, 0x380c2000, 0x380c4000, 0x380c6000, 0x380c8000, 0x380ca000, 0x380cc000, 0x380ce000,
+    0x380d0000, 0x380d2000, 0x380d4000, 0x380d6000, 0x380d8000, 0x380da000, 0x380dc000, 0x380de000,
+    0x380e0000, 0x380e2000, 0x380e4000, 0x380e6000, 0x380e8000, 0x380ea000, 0x380ec000, 0x380ee000,
+    0x380f0000, 0x380f2000, 0x380f4000, 0x380f6000, 0x380f8000, 0x380fa000, 0x380fc000, 0x380fe000,
+    0x38100000, 0x38102000, 0x38104000, 0x38106000, 0x38108000, 0x3810a000, 0x3810c000, 0x3810e000,
+    0x38110000, 0x38112000, 0x38114000, 0x38116000, 0x38118000, 0x3811a000, 0x3811c000, 0x3811e000,
+    0x38120000, 0x38122000, 0x38124000, 0x38126000, 0x38128000, 0x3812a000, 0x3812c000, 0x3812e000,
+    0x38130000, 0x38132000, 0x38134000, 0x38136000, 0x38138000, 0x3813a000, 0x3813c000, 0x3813e000,
+    0x38140000, 0x38142000, 0x38144000, 0x38146000, 0x38148000, 0x3814a000, 0x3814c000, 0x3814e000,
+    0x38150000, 0x38152000, 0x38154000, 0x38156000, 0x38158000, 0x3815a000, 0x3815c000, 0x3815e000,
+    0x38160000, 0x38162000, 0x38164000, 0x38166000, 0x38168000, 0x3816a000, 0x3816c000, 0x3816e000,
+    0x38170000, 0x38172000, 0x38174000, 0x38176000, 0x38178000, 0x3817a000, 0x3817c000, 0x3817e000,
+    0x38180000, 0x38182000, 0x38184000, 0x38186000, 0x38188000, 0x3818a000, 0x3818c000, 0x3818e000,
+    0x38190000, 0x38192000, 0x38194000, 0x38196000, 0x38198000, 0x3819a000, 0x3819c000, 0x3819e000,
+    0x381a0000, 0x381a2000, 0x381a4000, 0x381a6000, 0x381a8000, 0x381aa000, 0x381ac000, 0x381ae000,
+    0x381b0000, 0x381b2000, 0x381b4000, 0x381b6000, 0x381b8000, 0x381ba000, 0x381bc000, 0x381be000,
+    0x381c0000, 0x381c2000, 0x381c4000, 0x381c6000, 0x381c8000, 0x381ca000, 0x381cc000, 0x381ce000,
+    0x381d0000, 0x381d2000, 0x381d4000, 0x381d6000, 0x381d8000, 0x381da000, 0x381dc000, 0x381de000,
+    0x381e0000, 0x381e2000, 0x381e4000, 0x381e6000, 0x381e8000, 0x381ea000, 0x381ec000, 0x381ee000,
+    0x381f0000, 0x381f2000, 0x381f4000, 0x381f6000, 0x381f8000, 0x381fa000, 0x381fc000, 0x381fe000,
+    0x38200000, 0x38202000, 0x38204000, 0x38206000, 0x38208000, 0x3820a000, 0x3820c000, 0x3820e000,
+    0x38210000, 0x38212000, 0x38214000, 0x38216000, 0x38218000, 0x3821a000, 0x3821c000, 0x3821e000,
+    0x38220000, 0x38222000, 0x38224000, 0x38226000, 0x38228000, 0x3822a000, 0x3822c000, 0x3822e000,
+    0x38230000, 0x38232000, 0x38234000, 0x38236000, 0x38238000, 0x3823a000, 0x3823c000, 0x3823e000,
+    0x38240000, 0x38242000, 0x38244000, 0x38246000, 0x38248000, 0x3824a000, 0x3824c000, 0x3824e000,
+    0x38250000, 0x38252000, 0x38254000, 0x38256000, 0x38258000, 0x3825a000, 0x3825c000, 0x3825e000,
+    0x38260000, 0x38262000, 0x38264000, 0x38266000, 0x38268000, 0x3826a000, 0x3826c000, 0x3826e000,
+    0x38270000, 0x38272000, 0x38274000, 0x38276000, 0x38278000, 0x3827a000, 0x3827c000, 0x3827e000,
+    0x38280000, 0x38282000, 0x38284000, 0x38286000, 0x38288000, 0x3828a000, 0x3828c000, 0x3828e000,
+    0x38290000, 0x38292000, 0x38294000, 0x38296000, 0x38298000, 0x3829a000, 0x3829c000, 0x3829e000,
+    0x382a0000, 0x382a2000, 0x382a4000, 0x382a6000, 0x382a8000, 0x382aa000, 0x382ac000, 0x382ae000,
+    0x382b0000, 0x382b2000, 0x382b4000, 0x382b6000, 0x382b8000, 0x382ba000, 0x382bc000, 0x382be000,
+    0x382c0000, 0x382c2000, 0x382c4000, 0x382c6000, 0x382c8000, 0x382ca000, 0x382cc000, 0x382ce000,
+    0x382d0000, 0x382d2000, 0x382d4000, 0x382d6000, 0x382d8000, 0x382da000, 0x382dc000, 0x382de000,
+    0x382e0000, 0x382e2000, 0x382e4000, 0x382e6000, 0x382e8000, 0x382ea000, 0x382ec000, 0x382ee000,
+    0x382f0000, 0x382f2000, 0x382f4000, 0x382f6000, 0x382f8000, 0x382fa000, 0x382fc000, 0x382fe000,
+    0x38300000, 0x38302000, 0x38304000, 0x38306000, 0x38308000, 0x3830a000, 0x3830c000, 0x3830e000,
+    0x38310000, 0x38312000, 0x38314000, 0x38316000, 0x38318000, 0x3831a000, 0x3831c000, 0x3831e000,
+    0x38320000, 0x38322000, 0x38324000, 0x38326000, 0x38328000, 0x3832a000, 0x3832c000, 0x3832e000,
+    0x38330000, 0x38332000, 0x38334000, 0x38336000, 0x38338000, 0x3833a000, 0x3833c000, 0x3833e000,
+    0x38340000, 0x38342000, 0x38344000, 0x38346000, 0x38348000, 0x3834a000, 0x3834c000, 0x3834e000,
+    0x38350000, 0x38352000, 0x38354000, 0x38356000, 0x38358000, 0x3835a000, 0x3835c000, 0x3835e000,
+    0x38360000, 0x38362000, 0x38364000, 0x38366000, 0x38368000, 0x3836a000, 0x3836c000, 0x3836e000,
+    0x38370000, 0x38372000, 0x38374000, 0x38376000, 0x38378000, 0x3837a000, 0x3837c000, 0x3837e000,
+    0x38380000, 0x38382000, 0x38384000, 0x38386000, 0x38388000, 0x3838a000, 0x3838c000, 0x3838e000,
+    0x38390000, 0x38392000, 0x38394000, 0x38396000, 0x38398000, 0x3839a000, 0x3839c000, 0x3839e000,
+    0x383a0000, 0x383a2000, 0x383a4000, 0x383a6000, 0x383a8000, 0x383aa000, 0x383ac000, 0x383ae000,
+    0x383b0000, 0x383b2000, 0x383b4000, 0x383b6000, 0x383b8000, 0x383ba000, 0x383bc000, 0x383be000,
+    0x383c0000, 0x383c2000, 0x383c4000, 0x383c6000, 0x383c8000, 0x383ca000, 0x383cc000, 0x383ce000,
+    0x383d0000, 0x383d2000, 0x383d4000, 0x383d6000, 0x383d8000, 0x383da000, 0x383dc000, 0x383de000,
+    0x383e0000, 0x383e2000, 0x383e4000, 0x383e6000, 0x383e8000, 0x383ea000, 0x383ec000, 0x383ee000,
+    0x383f0000, 0x383f2000, 0x383f4000, 0x383f6000, 0x383f8000, 0x383fa000, 0x383fc000, 0x383fe000,
+    0x38400000, 0x38402000, 0x38404000, 0x38406000, 0x38408000, 0x3840a000, 0x3840c000, 0x3840e000,
+    0x38410000, 0x38412000, 0x38414000, 0x38416000, 0x38418000, 0x3841a000, 0x3841c000, 0x3841e000,
+    0x38420000, 0x38422000, 0x38424000, 0x38426000, 0x38428000, 0x3842a000, 0x3842c000, 0x3842e000,
+    0x38430000, 0x38432000, 0x38434000, 0x38436000, 0x38438000, 0x3843a000, 0x3843c000, 0x3843e000,
+    0x38440000, 0x38442000, 0x38444000, 0x38446000, 0x38448000, 0x3844a000, 0x3844c000, 0x3844e000,
+    0x38450000, 0x38452000, 0x38454000, 0x38456000, 0x38458000, 0x3845a000, 0x3845c000, 0x3845e000,
+    0x38460000, 0x38462000, 0x38464000, 0x38466000, 0x38468000, 0x3846a000, 0x3846c000, 0x3846e000,
+    0x38470000, 0x38472000, 0x38474000, 0x38476000, 0x38478000, 0x3847a000, 0x3847c000, 0x3847e000,
+    0x38480000, 0x38482000, 0x38484000, 0x38486000, 0x38488000, 0x3848a000, 0x3848c000, 0x3848e000,
+    0x38490000, 0x38492000, 0x38494000, 0x38496000, 0x38498000, 0x3849a000, 0x3849c000, 0x3849e000,
+    0x384a0000, 0x384a2000, 0x384a4000, 0x384a6000, 0x384a8000, 0x384aa000, 0x384ac000, 0x384ae000,
+    0x384b0000, 0x384b2000, 0x384b4000, 0x384b6000, 0x384b8000, 0x384ba000, 0x384bc000, 0x384be000,
+    0x384c0000, 0x384c2000, 0x384c4000, 0x384c6000, 0x384c8000, 0x384ca000, 0x384cc000, 0x384ce000,
+    0x384d0000, 0x384d2000, 0x384d4000, 0x384d6000, 0x384d8000, 0x384da000, 0x384dc000, 0x384de000,
+    0x384e0000, 0x384e2000, 0x384e4000, 0x384e6000, 0x384e8000, 0x384ea000, 0x384ec000, 0x384ee000,
+    0x384f0000, 0x384f2000, 0x384f4000, 0x384f6000, 0x384f8000, 0x384fa000, 0x384fc000, 0x384fe000,
+    0x38500000, 0x38502000, 0x38504000, 0x38506000, 0x38508000, 0x3850a000, 0x3850c000, 0x3850e000,
+    0x38510000, 0x38512000, 0x38514000, 0x38516000, 0x38518000, 0x3851a000, 0x3851c000, 0x3851e000,
+    0x38520000, 0x38522000, 0x38524000, 0x38526000, 0x38528000, 0x3852a000, 0x3852c000, 0x3852e000,
+    0x38530000, 0x38532000, 0x38534000, 0x38536000, 0x38538000, 0x3853a000, 0x3853c000, 0x3853e000,
+    0x38540000, 0x38542000, 0x38544000, 0x38546000, 0x38548000, 0x3854a000, 0x3854c000, 0x3854e000,
+    0x38550000, 0x38552000, 0x38554000, 0x38556000, 0x38558000, 0x3855a000, 0x3855c000, 0x3855e000,
+    0x38560000, 0x38562000, 0x38564000, 0x38566000, 0x38568000, 0x3856a000, 0x3856c000, 0x3856e000,
+    0x38570000, 0x38572000, 0x38574000, 0x38576000, 0x38578000, 0x3857a000, 0x3857c000, 0x3857e000,
+    0x38580000, 0x38582000, 0x38584000, 0x38586000, 0x38588000, 0x3858a000, 0x3858c000, 0x3858e000,
+    0x38590000, 0x38592000, 0x38594000, 0x38596000, 0x38598000, 0x3859a000, 0x3859c000, 0x3859e000,
+    0x385a0000, 0x385a2000, 0x385a4000, 0x385a6000, 0x385a8000, 0x385aa000, 0x385ac000, 0x385ae000,
+    0x385b0000, 0x385b2000, 0x385b4000, 0x385b6000, 0x385b8000, 0x385ba000, 0x385bc000, 0x385be000,
+    0x385c0000, 0x385c2000, 0x385c4000, 0x385c6000, 0x385c8000, 0x385ca000, 0x385cc000, 0x385ce000,
+    0x385d0000, 0x385d2000, 0x385d4000, 0x385d6000, 0x385d8000, 0x385da000, 0x385dc000, 0x385de000,
+    0x385e0000, 0x385e2000, 0x385e4000, 0x385e6000, 0x385e8000, 0x385ea000, 0x385ec000, 0x385ee000,
+    0x385f0000, 0x385f2000, 0x385f4000, 0x385f6000, 0x385f8000, 0x385fa000, 0x385fc000, 0x385fe000,
+    0x38600000, 0x38602000, 0x38604000, 0x38606000, 0x38608000, 0x3860a000, 0x3860c000, 0x3860e000,
+    0x38610000, 0x38612000, 0x38614000, 0x38616000, 0x38618000, 0x3861a000, 0x3861c000, 0x3861e000,
+    0x38620000, 0x38622000, 0x38624000, 0x38626000, 0x38628000, 0x3862a000, 0x3862c000, 0x3862e000,
+    0x38630000, 0x38632000, 0x38634000, 0x38636000, 0x38638000, 0x3863a000, 0x3863c000, 0x3863e000,
+    0x38640000, 0x38642000, 0x38644000, 0x38646000, 0x38648000, 0x3864a000, 0x3864c000, 0x3864e000,
+    0x38650000, 0x38652000, 0x38654000, 0x38656000, 0x38658000, 0x3865a000, 0x3865c000, 0x3865e000,
+    0x38660000, 0x38662000, 0x38664000, 0x38666000, 0x38668000, 0x3866a000, 0x3866c000, 0x3866e000,
+    0x38670000, 0x38672000, 0x38674000, 0x38676000, 0x38678000, 0x3867a000, 0x3867c000, 0x3867e000,
+    0x38680000, 0x38682000, 0x38684000, 0x38686000, 0x38688000, 0x3868a000, 0x3868c000, 0x3868e000,
+    0x38690000, 0x38692000, 0x38694000, 0x38696000, 0x38698000, 0x3869a000, 0x3869c000, 0x3869e000,
+    0x386a0000, 0x386a2000, 0x386a4000, 0x386a6000, 0x386a8000, 0x386aa000, 0x386ac000, 0x386ae000,
+    0x386b0000, 0x386b2000, 0x386b4000, 0x386b6000, 0x386b8000, 0x386ba000, 0x386bc000, 0x386be000,
+    0x386c0000, 0x386c2000, 0x386c4000, 0x386c6000, 0x386c8000, 0x386ca000, 0x386cc000, 0x386ce000,
+    0x386d0000, 0x386d2000, 0x386d4000, 0x386d6000, 0x386d8000, 0x386da000, 0x386dc000, 0x386de000,
+    0x386e0000, 0x386e2000, 0x386e4000, 0x386e6000, 0x386e8000, 0x386ea000, 0x386ec000, 0x386ee000,
+    0x386f0000, 0x386f2000, 0x386f4000, 0x386f6000, 0x386f8000, 0x386fa000, 0x386fc000, 0x386fe000,
+    0x38700000, 0x38702000, 0x38704000, 0x38706000, 0x38708000, 0x3870a000, 0x3870c000, 0x3870e000,
+    0x38710000, 0x38712000, 0x38714000, 0x38716000, 0x38718000, 0x3871a000, 0x3871c000, 0x3871e000,
+    0x38720000, 0x38722000, 0x38724000, 0x38726000, 0x38728000, 0x3872a000, 0x3872c000, 0x3872e000,
+    0x38730000, 0x38732000, 0x38734000, 0x38736000, 0x38738000, 0x3873a000, 0x3873c000, 0x3873e000,
+    0x38740000, 0x38742000, 0x38744000, 0x38746000, 0x38748000, 0x3874a000, 0x3874c000, 0x3874e000,
+    0x38750000, 0x38752000, 0x38754000, 0x38756000, 0x38758000, 0x3875a000, 0x3875c000, 0x3875e000,
+    0x38760000, 0x38762000, 0x38764000, 0x38766000, 0x38768000, 0x3876a000, 0x3876c000, 0x3876e000,
+    0x38770000, 0x38772000, 0x38774000, 0x38776000, 0x38778000, 0x3877a000, 0x3877c000, 0x3877e000,
+    0x38780000, 0x38782000, 0x38784000, 0x38786000, 0x38788000, 0x3878a000, 0x3878c000, 0x3878e000,
+    0x38790000, 0x38792000, 0x38794000, 0x38796000, 0x38798000, 0x3879a000, 0x3879c000, 0x3879e000,
+    0x387a0000, 0x387a2000, 0x387a4000, 0x387a6000, 0x387a8000, 0x387aa000, 0x387ac000, 0x387ae000,
+    0x387b0000, 0x387b2000, 0x387b4000, 0x387b6000, 0x387b8000, 0x387ba000, 0x387bc000, 0x387be000,
+    0x387c0000, 0x387c2000, 0x387c4000, 0x387c6000, 0x387c8000, 0x387ca000, 0x387cc000, 0x387ce000,
+    0x387d0000, 0x387d2000, 0x387d4000, 0x387d6000, 0x387d8000, 0x387da000, 0x387dc000, 0x387de000,
+    0x387e0000, 0x387e2000, 0x387e4000, 0x387e6000, 0x387e8000, 0x387ea000, 0x387ec000, 0x387ee000,
+    0x387f0000, 0x387f2000, 0x387f4000, 0x387f6000, 0x387f8000, 0x387fa000, 0x387fc000, 0x387fe000,
+};
+
+const static unsigned g_exponent[64] = {
+    0x00000000, 0x00800000, 0x01000000, 0x01800000, 0x02000000, 0x02800000, 0x03000000, 0x03800000,
+    0x04000000, 0x04800000, 0x05000000, 0x05800000, 0x06000000, 0x06800000, 0x07000000, 0x07800000,
+    0x08000000, 0x08800000, 0x09000000, 0x09800000, 0x0a000000, 0x0a800000, 0x0b000000, 0x0b800000,
+    0x0c000000, 0x0c800000, 0x0d000000, 0x0d800000, 0x0e000000, 0x0e800000, 0x0f000000, 0x47800000,
+    0x80000000, 0x80800000, 0x81000000, 0x81800000, 0x82000000, 0x82800000, 0x83000000, 0x83800000,
+    0x84000000, 0x84800000, 0x85000000, 0x85800000, 0x86000000, 0x86800000, 0x87000000, 0x87800000,
+    0x88000000, 0x88800000, 0x89000000, 0x89800000, 0x8a000000, 0x8a800000, 0x8b000000, 0x8b800000,
+    0x8c000000, 0x8c800000, 0x8d000000, 0x8d800000, 0x8e000000, 0x8e800000, 0x8f000000, 0xc7800000,
+};
+
+const static unsigned g_offset[64] = {
+    0x00000000, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400,
+    0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400,
+    0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400,
+    0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400,
+    0x00000000, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400,
+    0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400,
+    0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400,
+    0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400, 0x00000400,
+};
+
+float float16ToFloat32(unsigned short h)
+{
+    unsigned i32 = g_mantissa[g_offset[h >> 10] + (h & 0x3ff)] + g_exponent[h >> 10];
+    return bitCast<float>(i32);
+}
+}  // namespace gl
diff --git a/gfx/angle/checkout/src/common/MemoryBuffer.cpp b/gfx/angle/checkout/src/common/MemoryBuffer.cpp
new file mode 100644
index 0000000000..aadffe8bbe
--- /dev/null
+++ b/gfx/angle/checkout/src/common/MemoryBuffer.cpp
@@ -0,0 +1,179 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "common/MemoryBuffer.h"
+
+#include <algorithm>
+#include <cstdlib>
+
+#include "common/debug.h"
+
+namespace angle
+{
+
+// MemoryBuffer implementation.
+MemoryBuffer::~MemoryBuffer()
+{
+    if (mData)
+    {
+        free(mData);
+        mData = nullptr;
+    }
+}
+
+bool MemoryBuffer::resize(size_t size)
+{
+    if (size == 0)
+    {
+        if (mData)
+        {
+            free(mData);
+            mData = nullptr;
+        }
+        mSize = 0;
+        return true;
+    }
+
+    if (size == mSize)
+    {
+        return true;
+    }
+
+    // Only reallocate if the size has changed.
+    uint8_t *newMemory = static_cast<uint8_t *>(malloc(sizeof(uint8_t) * size));
+    if (newMemory == nullptr)
+    {
+        return false;
+    }
+
+    if (mData)
+    {
+        // Copy the intersection of the old data and the new data
+        std::copy(mData, mData + std::min(mSize, size), newMemory);
+        free(mData);
+    }
+
+    mData = newMemory;
+    mSize = size;
+
+    return true;
+}
+
+void MemoryBuffer::fill(uint8_t datum)
+{
+    if (!empty())
+    {
+        std::fill(mData, mData + mSize, datum);
+    }
+}
+
+MemoryBuffer::MemoryBuffer(MemoryBuffer &&other) : MemoryBuffer()
+{
+    *this = std::move(other);
+}
+
+MemoryBuffer &MemoryBuffer::operator=(MemoryBuffer &&other)
+{
+    std::swap(mSize, other.mSize);
+    std::swap(mData, other.mData);
+    return *this;
+}
+
+namespace
+{
+static constexpr uint32_t kDefaultScratchBufferLifetime = 1000u;
+
+}  // anonymous namespace
+
+// ScratchBuffer implementation.
+ScratchBuffer::ScratchBuffer() : ScratchBuffer(kDefaultScratchBufferLifetime) {}
+
+ScratchBuffer::ScratchBuffer(uint32_t lifetime) : mLifetime(lifetime), mResetCounter(lifetime) {}
+
+ScratchBuffer::~ScratchBuffer() {}
+
+ScratchBuffer::ScratchBuffer(ScratchBuffer &&other)
+{
+    *this = std::move(other);
+}
+
+ScratchBuffer &ScratchBuffer::operator=(ScratchBuffer &&other)
+{
+    std::swap(mLifetime, other.mLifetime);
+    std::swap(mResetCounter, other.mResetCounter);
+    std::swap(mScratchMemory, other.mScratchMemory);
+    return *this;
+}
+
+bool ScratchBuffer::get(size_t requestedSize, MemoryBuffer **memoryBufferOut)
+{
+    return getImpl(requestedSize, memoryBufferOut, Optional<uint8_t>::Invalid());
+}
+
+bool ScratchBuffer::getInitialized(size_t requestedSize,
+                                   MemoryBuffer **memoryBufferOut,
+                                   uint8_t initValue)
+{
+    return getImpl(requestedSize, memoryBufferOut, Optional<uint8_t>(initValue));
+}
+
+bool ScratchBuffer::getImpl(size_t requestedSize,
+                            MemoryBuffer **memoryBufferOut,
+                            Optional<uint8_t> initValue)
+{
+    if (mScratchMemory.size() == requestedSize)
+    {
+        mResetCounter    = mLifetime;
+        *memoryBufferOut = &mScratchMemory;
+        return true;
+    }
+
+    if (mScratchMemory.size() > requestedSize)
+    {
+        tick();
+    }
+
+    if (mScratchMemory.size() < requestedSize)
+    {
+        if (!mScratchMemory.resize(requestedSize))
+        {
+            return false;
+        }
+        mResetCounter = mLifetime;
+        if (initValue.valid())
+        {
+            mScratchMemory.fill(initValue.value());
+        }
+    }
+
+    ASSERT(mScratchMemory.size() >= requestedSize);
+
+    *memoryBufferOut = &mScratchMemory;
+    return true;
+}
+
+void ScratchBuffer::tick()
+{
+    if (mResetCounter > 0)
+    {
+        --mResetCounter;
+        if (mResetCounter == 0)
+        {
+            clear();
+        }
+    }
+}
+
+void ScratchBuffer::clear()
+{
+    mResetCounter = mLifetime;
+    if (mScratchMemory.size() > 0)
+    {
+        mScratchMemory.clear();
+    }
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/MemoryBuffer.h b/gfx/angle/checkout/src/common/MemoryBuffer.h
new file mode 100644
index 0000000000..bcd3aab7a9
--- /dev/null
+++ b/gfx/angle/checkout/src/common/MemoryBuffer.h
@@ -0,0 +1,93 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMMON_MEMORYBUFFER_H_
+#define COMMON_MEMORYBUFFER_H_
+
+#include "common/Optional.h"
+#include "common/angleutils.h"
+#include "common/debug.h"
+
+#include <stdint.h>
+#include <cstddef>
+
+namespace angle
+{
+
+class MemoryBuffer final : NonCopyable
+{
+  public:
+    MemoryBuffer() = default;
+    ~MemoryBuffer();
+
+    MemoryBuffer(MemoryBuffer &&other);
+    MemoryBuffer &operator=(MemoryBuffer &&other);
+
+    [[nodiscard]] bool resize(size_t size);
+    void clear() { (void)resize(0); }
+    size_t size() const { return mSize; }
+    bool empty() const { return mSize == 0; }
+
+    const uint8_t *data() const { return mData; }
+    uint8_t *data()
+    {
+        ASSERT(mData);
+        return mData;
+    }
+
+    uint8_t &operator[](size_t pos)
+    {
+        ASSERT(pos < mSize);
+        return mData[pos];
+    }
+    const uint8_t &operator[](size_t pos) const
+    {
+        ASSERT(pos < mSize);
+        return mData[pos];
+    }
+
+    void fill(uint8_t datum);
+
+  private:
+    size_t mSize   = 0;
+    uint8_t *mData = nullptr;
+};
+
+class ScratchBuffer final : NonCopyable
+{
+  public:
+    // If we request a scratch buffer requesting a smaller size this many times, release and
+    // recreate the scratch buffer. This ensures we don't have a degenerate case where we are stuck
+    // hogging memory.
+    ScratchBuffer();
+    ScratchBuffer(uint32_t lifetime);
+    ~ScratchBuffer();
+
+    ScratchBuffer(ScratchBuffer &&other);
+    ScratchBuffer &operator=(ScratchBuffer &&other);
+
+    // Returns true with a memory buffer of the requested size, or false on failure.
+    bool get(size_t requestedSize, MemoryBuffer **memoryBufferOut);
+
+    // Same as get, but ensures new values are initialized to a fixed constant.
+    bool getInitialized(size_t requestedSize, MemoryBuffer **memoryBufferOut, uint8_t initValue);
+
+    // Ticks the release counter for the scratch buffer. Also done implicitly in get().
+    void tick();
+
+    void clear();
+
+  private:
+    bool getImpl(size_t requestedSize, MemoryBuffer **memoryBufferOut, Optional<uint8_t> initValue);
+
+    uint32_t mLifetime;
+    uint32_t mResetCounter;
+    MemoryBuffer mScratchMemory;
+};
+
+}  // namespace angle
+
+#endif  // COMMON_MEMORYBUFFER_H_
diff --git a/gfx/angle/checkout/src/common/Optional.h b/gfx/angle/checkout/src/common/Optional.h
new file mode 100644
index 0000000000..46c65dde4e
--- /dev/null
+++ b/gfx/angle/checkout/src/common/Optional.h
@@ -0,0 +1,74 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Optional.h:
+//   Represents a type that may be invalid, similar to std::optional.
+//
+
+#ifndef COMMON_OPTIONAL_H_
+#define COMMON_OPTIONAL_H_
+
+#include <utility>
+
+template <class T>
+struct Optional
+{
+    Optional() : mValid(false), mValue(T()) {}
+
+    Optional(const T &valueIn) : mValid(true), mValue(valueIn) {}
+
+    Optional(const Optional &other) : mValid(other.mValid), mValue(other.mValue) {}
+
+    Optional &operator=(const Optional &other)
+    {
+        this->mValid = other.mValid;
+        this->mValue = other.mValue;
+        return *this;
+    }
+
+    Optional &operator=(const T &value)
+    {
+        mValue = value;
+        mValid = true;
+        return *this;
+    }
+
+    Optional &operator=(T &&value)
+    {
+        mValue = std::move(value);
+        mValid = true;
+        return *this;
+    }
+
+    void reset() { mValid = false; }
+    T &&release()
+    {
+        mValid = false;
+        return std::move(mValue);
+    }
+
+    static Optional Invalid() { return Optional(); }
+
+    bool valid() const { return mValid; }
+    T &value() { return mValue; }
+    const T &value() const { return mValue; }
+
+    bool operator==(const Optional &other) const
+    {
+        return ((mValid == other.mValid) && (!mValid || (mValue == other.mValue)));
+    }
+
+    bool operator!=(const Optional &other) const { return !(*this == other); }
+
+    bool operator==(const T &value) const { return mValid && (mValue == value); }
+
+    bool operator!=(const T &value) const { return !(*this == value); }
+
+  private:
+    bool mValid;
+    T mValue;
+};
+
+#endif  // COMMON_OPTIONAL_H_
diff --git a/gfx/angle/checkout/src/common/PackedEGLEnums_autogen.cpp b/gfx/angle/checkout/src/common/PackedEGLEnums_autogen.cpp
new file mode 100644
index 0000000000..738254bd18
--- /dev/null
+++ b/gfx/angle/checkout/src/common/PackedEGLEnums_autogen.cpp
@@ -0,0 +1,452 @@
+// GENERATED FILE - DO NOT EDIT.
+// Generated by gen_packed_gl_enums.py using data from packed_egl_enums.json.
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// PackedEGLEnums_autogen.cpp:
+//   Implements ANGLE-specific enums classes for EGLenums and functions operating
+//   on them.
+
+#include "common/PackedEGLEnums_autogen.h"
+#include "common/debug.h"
+
+namespace egl
+{
+
+template <>
+ColorSpace FromEGLenum<ColorSpace>(EGLenum from)
+{
+    switch (from)
+    {
+        case EGL_COLORSPACE_sRGB:
+            return ColorSpace::sRGB;
+        case EGL_COLORSPACE_LINEAR:
+            return ColorSpace::Linear;
+        default:
+            return ColorSpace::InvalidEnum;
+    }
+}
+
+EGLenum ToEGLenum(ColorSpace from)
+{
+    switch (from)
+    {
+        case ColorSpace::sRGB:
+            return EGL_COLORSPACE_sRGB;
+        case ColorSpace::Linear:
+            return EGL_COLORSPACE_LINEAR;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ColorSpace value)
+{
+    switch (value)
+    {
+        case ColorSpace::sRGB:
+            os << "EGL_COLORSPACE_sRGB";
+            break;
+        case ColorSpace::Linear:
+            os << "EGL_COLORSPACE_LINEAR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+CompositorTiming FromEGLenum<CompositorTiming>(EGLenum from)
+{
+    switch (from)
+    {
+        case EGL_COMPOSITE_DEADLINE_ANDROID:
+            return CompositorTiming::CompositeDeadline;
+        case EGL_COMPOSITE_INTERVAL_ANDROID:
+            return CompositorTiming::CompositInterval;
+        case EGL_COMPOSITE_TO_PRESENT_LATENCY_ANDROID:
+            return CompositorTiming::CompositToPresentLatency;
+        default:
+            return CompositorTiming::InvalidEnum;
+    }
+}
+
+EGLenum ToEGLenum(CompositorTiming from)
+{
+    switch (from)
+    {
+        case CompositorTiming::CompositeDeadline:
+            return EGL_COMPOSITE_DEADLINE_ANDROID;
+        case CompositorTiming::CompositInterval:
+            return EGL_COMPOSITE_INTERVAL_ANDROID;
+        case CompositorTiming::CompositToPresentLatency:
+            return EGL_COMPOSITE_TO_PRESENT_LATENCY_ANDROID;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, CompositorTiming value)
+{
+    switch (value)
+    {
+        case CompositorTiming::CompositeDeadline:
+            os << "EGL_COMPOSITE_DEADLINE_ANDROID";
+            break;
+        case CompositorTiming::CompositInterval:
+            os << "EGL_COMPOSITE_INTERVAL_ANDROID";
+            break;
+        case CompositorTiming::CompositToPresentLatency:
+            os << "EGL_COMPOSITE_TO_PRESENT_LATENCY_ANDROID";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+ContextPriority FromEGLenum<ContextPriority>(EGLenum from)
+{
+    switch (from)
+    {
+        case EGL_CONTEXT_PRIORITY_LOW_IMG:
+            return ContextPriority::Low;
+        case EGL_CONTEXT_PRIORITY_MEDIUM_IMG:
+            return ContextPriority::Medium;
+        case EGL_CONTEXT_PRIORITY_HIGH_IMG:
+            return ContextPriority::High;
+        default:
+            return ContextPriority::InvalidEnum;
+    }
+}
+
+EGLenum ToEGLenum(ContextPriority from)
+{
+    switch (from)
+    {
+        case ContextPriority::Low:
+            return EGL_CONTEXT_PRIORITY_LOW_IMG;
+        case ContextPriority::Medium:
+            return EGL_CONTEXT_PRIORITY_MEDIUM_IMG;
+        case ContextPriority::High:
+            return EGL_CONTEXT_PRIORITY_HIGH_IMG;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ContextPriority value)
+{
+    switch (value)
+    {
+        case ContextPriority::Low:
+            os << "EGL_CONTEXT_PRIORITY_LOW_IMG";
+            break;
+        case ContextPriority::Medium:
+            os << "EGL_CONTEXT_PRIORITY_MEDIUM_IMG";
+            break;
+        case ContextPriority::High:
+            os << "EGL_CONTEXT_PRIORITY_HIGH_IMG";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+MessageType FromEGLenum<MessageType>(EGLenum from)
+{
+    switch (from)
+    {
+        case EGL_DEBUG_MSG_CRITICAL_KHR:
+            return MessageType::Critical;
+        case EGL_DEBUG_MSG_ERROR_KHR:
+            return MessageType::Error;
+        case EGL_DEBUG_MSG_WARN_KHR:
+            return MessageType::Warn;
+        case EGL_DEBUG_MSG_INFO_KHR:
+            return MessageType::Info;
+        default:
+            return MessageType::InvalidEnum;
+    }
+}
+
+EGLenum ToEGLenum(MessageType from)
+{
+    switch (from)
+    {
+        case MessageType::Critical:
+            return EGL_DEBUG_MSG_CRITICAL_KHR;
+        case MessageType::Error:
+            return EGL_DEBUG_MSG_ERROR_KHR;
+        case MessageType::Warn:
+            return EGL_DEBUG_MSG_WARN_KHR;
+        case MessageType::Info:
+            return EGL_DEBUG_MSG_INFO_KHR;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, MessageType value)
+{
+    switch (value)
+    {
+        case MessageType::Critical:
+            os << "EGL_DEBUG_MSG_CRITICAL_KHR";
+            break;
+        case MessageType::Error:
+            os << "EGL_DEBUG_MSG_ERROR_KHR";
+            break;
+        case MessageType::Warn:
+            os << "EGL_DEBUG_MSG_WARN_KHR";
+            break;
+        case MessageType::Info:
+            os << "EGL_DEBUG_MSG_INFO_KHR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+ObjectType FromEGLenum<ObjectType>(EGLenum from)
+{
+    switch (from)
+    {
+        case EGL_OBJECT_THREAD_KHR:
+            return ObjectType::Thread;
+        case EGL_OBJECT_DISPLAY_KHR:
+            return ObjectType::Display;
+        case EGL_OBJECT_CONTEXT_KHR:
+            return ObjectType::Context;
+        case EGL_OBJECT_SURFACE_KHR:
+            return ObjectType::Surface;
+        case EGL_OBJECT_IMAGE_KHR:
+            return ObjectType::Image;
+        case EGL_OBJECT_SYNC_KHR:
+            return ObjectType::Sync;
+        case EGL_OBJECT_STREAM_KHR:
+            return ObjectType::Stream;
+        default:
+            return ObjectType::InvalidEnum;
+    }
+}
+
+EGLenum ToEGLenum(ObjectType from)
+{
+    switch (from)
+    {
+        case ObjectType::Thread:
+            return EGL_OBJECT_THREAD_KHR;
+        case ObjectType::Display:
+            return EGL_OBJECT_DISPLAY_KHR;
+        case ObjectType::Context:
+            return EGL_OBJECT_CONTEXT_KHR;
+        case ObjectType::Surface:
+            return EGL_OBJECT_SURFACE_KHR;
+        case ObjectType::Image:
+            return EGL_OBJECT_IMAGE_KHR;
+        case ObjectType::Sync:
+            return EGL_OBJECT_SYNC_KHR;
+        case ObjectType::Stream:
+            return EGL_OBJECT_STREAM_KHR;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ObjectType value)
+{
+    switch (value)
+    {
+        case ObjectType::Thread:
+            os << "EGL_OBJECT_THREAD_KHR";
+            break;
+        case ObjectType::Display:
+            os << "EGL_OBJECT_DISPLAY_KHR";
+            break;
+        case ObjectType::Context:
+            os << "EGL_OBJECT_CONTEXT_KHR";
+            break;
+        case ObjectType::Surface:
+            os << "EGL_OBJECT_SURFACE_KHR";
+            break;
+        case ObjectType::Image:
+            os << "EGL_OBJECT_IMAGE_KHR";
+            break;
+        case ObjectType::Sync:
+            os << "EGL_OBJECT_SYNC_KHR";
+            break;
+        case ObjectType::Stream:
+            os << "EGL_OBJECT_STREAM_KHR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureFormat FromEGLenum<TextureFormat>(EGLenum from)
+{
+    switch (from)
+    {
+        case EGL_NO_TEXTURE:
+            return TextureFormat::NoTexture;
+        case EGL_TEXTURE_RGB:
+            return TextureFormat::RGB;
+        case EGL_TEXTURE_RGBA:
+            return TextureFormat::RGBA;
+        default:
+            return TextureFormat::InvalidEnum;
+    }
+}
+
+EGLenum ToEGLenum(TextureFormat from)
+{
+    switch (from)
+    {
+        case TextureFormat::NoTexture:
+            return EGL_NO_TEXTURE;
+        case TextureFormat::RGB:
+            return EGL_TEXTURE_RGB;
+        case TextureFormat::RGBA:
+            return EGL_TEXTURE_RGBA;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureFormat value)
+{
+    switch (value)
+    {
+        case TextureFormat::NoTexture:
+            os << "EGL_NO_TEXTURE";
+            break;
+        case TextureFormat::RGB:
+            os << "EGL_TEXTURE_RGB";
+            break;
+        case TextureFormat::RGBA:
+            os << "EGL_TEXTURE_RGBA";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+Timestamp FromEGLenum<Timestamp>(EGLenum from)
+{
+    switch (from)
+    {
+        case EGL_REQUESTED_PRESENT_TIME_ANDROID:
+            return Timestamp::RequestedPresentTime;
+        case EGL_RENDERING_COMPLETE_TIME_ANDROID:
+            return Timestamp::RenderingCompleteTime;
+        case EGL_COMPOSITION_LATCH_TIME_ANDROID:
+            return Timestamp::CompositionLatchTime;
+        case EGL_FIRST_COMPOSITION_START_TIME_ANDROID:
+            return Timestamp::FirstCompositionStartTime;
+        case EGL_LAST_COMPOSITION_START_TIME_ANDROID:
+            return Timestamp::LastCompositionStartTime;
+        case EGL_FIRST_COMPOSITION_GPU_FINISHED_TIME_ANDROID:
+            return Timestamp::FirstCompositionGPUFinishedTime;
+        case EGL_DISPLAY_PRESENT_TIME_ANDROID:
+            return Timestamp::DisplayPresentTime;
+        case EGL_DEQUEUE_READY_TIME_ANDROID:
+            return Timestamp::DequeueReadyTime;
+        case EGL_READS_DONE_TIME_ANDROID:
+            return Timestamp::ReadsDoneTime;
+        default:
+            return Timestamp::InvalidEnum;
+    }
+}
+
+EGLenum ToEGLenum(Timestamp from)
+{
+    switch (from)
+    {
+        case Timestamp::RequestedPresentTime:
+            return EGL_REQUESTED_PRESENT_TIME_ANDROID;
+        case Timestamp::RenderingCompleteTime:
+            return EGL_RENDERING_COMPLETE_TIME_ANDROID;
+        case Timestamp::CompositionLatchTime:
+            return EGL_COMPOSITION_LATCH_TIME_ANDROID;
+        case Timestamp::FirstCompositionStartTime:
+            return EGL_FIRST_COMPOSITION_START_TIME_ANDROID;
+        case Timestamp::LastCompositionStartTime:
+            return EGL_LAST_COMPOSITION_START_TIME_ANDROID;
+        case Timestamp::FirstCompositionGPUFinishedTime:
+            return EGL_FIRST_COMPOSITION_GPU_FINISHED_TIME_ANDROID;
+        case Timestamp::DisplayPresentTime:
+            return EGL_DISPLAY_PRESENT_TIME_ANDROID;
+        case Timestamp::DequeueReadyTime:
+            return EGL_DEQUEUE_READY_TIME_ANDROID;
+        case Timestamp::ReadsDoneTime:
+            return EGL_READS_DONE_TIME_ANDROID;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, Timestamp value)
+{
+    switch (value)
+    {
+        case Timestamp::RequestedPresentTime:
+            os << "EGL_REQUESTED_PRESENT_TIME_ANDROID";
+            break;
+        case Timestamp::RenderingCompleteTime:
+            os << "EGL_RENDERING_COMPLETE_TIME_ANDROID";
+            break;
+        case Timestamp::CompositionLatchTime:
+            os << "EGL_COMPOSITION_LATCH_TIME_ANDROID";
+            break;
+        case Timestamp::FirstCompositionStartTime:
+            os << "EGL_FIRST_COMPOSITION_START_TIME_ANDROID";
+            break;
+        case Timestamp::LastCompositionStartTime:
+            os << "EGL_LAST_COMPOSITION_START_TIME_ANDROID";
+            break;
+        case Timestamp::FirstCompositionGPUFinishedTime:
+            os << "EGL_FIRST_COMPOSITION_GPU_FINISHED_TIME_ANDROID";
+            break;
+        case Timestamp::DisplayPresentTime:
+            os << "EGL_DISPLAY_PRESENT_TIME_ANDROID";
+            break;
+        case Timestamp::DequeueReadyTime:
+            os << "EGL_DEQUEUE_READY_TIME_ANDROID";
+            break;
+        case Timestamp::ReadsDoneTime:
+            os << "EGL_READS_DONE_TIME_ANDROID";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+}  // namespace egl
diff --git a/gfx/angle/checkout/src/common/PackedEGLEnums_autogen.h b/gfx/angle/checkout/src/common/PackedEGLEnums_autogen.h
new file mode 100644
index 0000000000..7794e8509e
--- /dev/null
+++ b/gfx/angle/checkout/src/common/PackedEGLEnums_autogen.h
@@ -0,0 +1,144 @@
+// GENERATED FILE - DO NOT EDIT.
+// Generated by gen_packed_gl_enums.py using data from packed_egl_enums.json.
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// PackedEGLEnums_autogen.h:
+//   Declares ANGLE-specific enums classes for EGLenums and functions operating
+//   on them.
+
+#ifndef COMMON_PACKEDEGLENUMS_AUTOGEN_H_
+#define COMMON_PACKEDEGLENUMS_AUTOGEN_H_
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <cstdint>
+#include <ostream>
+
+namespace egl
+{
+
+template <typename Enum>
+Enum FromEGLenum(EGLenum from);
+
+enum class ColorSpace : uint8_t
+{
+    sRGB   = 0,
+    Linear = 1,
+
+    InvalidEnum = 2,
+    EnumCount   = 2,
+};
+
+template <>
+ColorSpace FromEGLenum<ColorSpace>(EGLenum from);
+EGLenum ToEGLenum(ColorSpace from);
+std::ostream &operator<<(std::ostream &os, ColorSpace value);
+
+enum class CompositorTiming : uint8_t
+{
+    CompositeDeadline        = 0,
+    CompositInterval         = 1,
+    CompositToPresentLatency = 2,
+
+    InvalidEnum = 3,
+    EnumCount   = 3,
+};
+
+template <>
+CompositorTiming FromEGLenum<CompositorTiming>(EGLenum from);
+EGLenum ToEGLenum(CompositorTiming from);
+std::ostream &operator<<(std::ostream &os, CompositorTiming value);
+
+enum class ContextPriority : uint8_t
+{
+    Low    = 0,
+    Medium = 1,
+    High   = 2,
+
+    InvalidEnum = 3,
+    EnumCount   = 3,
+};
+
+template <>
+ContextPriority FromEGLenum<ContextPriority>(EGLenum from);
+EGLenum ToEGLenum(ContextPriority from);
+std::ostream &operator<<(std::ostream &os, ContextPriority value);
+
+enum class MessageType : uint8_t
+{
+    Critical = 0,
+    Error    = 1,
+    Warn     = 2,
+    Info     = 3,
+
+    InvalidEnum = 4,
+    EnumCount   = 4,
+};
+
+template <>
+MessageType FromEGLenum<MessageType>(EGLenum from);
+EGLenum ToEGLenum(MessageType from);
+std::ostream &operator<<(std::ostream &os, MessageType value);
+
+enum class ObjectType : uint8_t
+{
+    Thread  = 0,
+    Display = 1,
+    Context = 2,
+    Surface = 3,
+    Image   = 4,
+    Sync    = 5,
+    Stream  = 6,
+
+    InvalidEnum = 7,
+    EnumCount   = 7,
+};
+
+template <>
+ObjectType FromEGLenum<ObjectType>(EGLenum from);
+EGLenum ToEGLenum(ObjectType from);
+std::ostream &operator<<(std::ostream &os, ObjectType value);
+
+enum class TextureFormat : uint8_t
+{
+    NoTexture = 0,
+    RGB       = 1,
+    RGBA      = 2,
+
+    InvalidEnum = 3,
+    EnumCount   = 3,
+};
+
+template <>
+TextureFormat FromEGLenum<TextureFormat>(EGLenum from);
+EGLenum ToEGLenum(TextureFormat from);
+std::ostream &operator<<(std::ostream &os, TextureFormat value);
+
+enum class Timestamp : uint8_t
+{
+    RequestedPresentTime            = 0,
+    RenderingCompleteTime           = 1,
+    CompositionLatchTime            = 2,
+    FirstCompositionStartTime       = 3,
+    LastCompositionStartTime        = 4,
+    FirstCompositionGPUFinishedTime = 5,
+    DisplayPresentTime              = 6,
+    DequeueReadyTime                = 7,
+    ReadsDoneTime                   = 8,
+
+    InvalidEnum = 9,
+    EnumCount   = 9,
+};
+
+template <>
+Timestamp FromEGLenum<Timestamp>(EGLenum from);
+EGLenum ToEGLenum(Timestamp from);
+std::ostream &operator<<(std::ostream &os, Timestamp value);
+
+}  // namespace egl
+
+#endif  // COMMON_PACKEDEGLENUMS_AUTOGEN_H_
diff --git a/gfx/angle/checkout/src/common/PackedEnums.cpp b/gfx/angle/checkout/src/common/PackedEnums.cpp
new file mode 100644
index 0000000000..e13a502a42
--- /dev/null
+++ b/gfx/angle/checkout/src/common/PackedEnums.cpp
@@ -0,0 +1,673 @@
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// PackedGLEnums.cpp:
+//   Declares ANGLE-specific enums classes for GLEnum and functions operating
+//   on them.
+
+#include "common/PackedEnums.h"
+
+#include "common/utilities.h"
+
+namespace gl
+{
+
+TextureType TextureTargetToType(TextureTarget target)
+{
+    switch (target)
+    {
+        case TextureTarget::CubeMapNegativeX:
+        case TextureTarget::CubeMapNegativeY:
+        case TextureTarget::CubeMapNegativeZ:
+        case TextureTarget::CubeMapPositiveX:
+        case TextureTarget::CubeMapPositiveY:
+        case TextureTarget::CubeMapPositiveZ:
+            return TextureType::CubeMap;
+        case TextureTarget::CubeMapArray:
+            return TextureType::CubeMapArray;
+        case TextureTarget::External:
+            return TextureType::External;
+        case TextureTarget::Rectangle:
+            return TextureType::Rectangle;
+        case TextureTarget::_2D:
+            return TextureType::_2D;
+        case TextureTarget::_2DArray:
+            return TextureType::_2DArray;
+        case TextureTarget::_2DMultisample:
+            return TextureType::_2DMultisample;
+        case TextureTarget::_2DMultisampleArray:
+            return TextureType::_2DMultisampleArray;
+        case TextureTarget::_3D:
+            return TextureType::_3D;
+        case TextureTarget::VideoImage:
+            return TextureType::VideoImage;
+        case TextureTarget::Buffer:
+            return TextureType::Buffer;
+        case TextureTarget::InvalidEnum:
+            return TextureType::InvalidEnum;
+        default:
+            UNREACHABLE();
+            return TextureType::InvalidEnum;
+    }
+}
+
+bool IsCubeMapFaceTarget(TextureTarget target)
+{
+    return TextureTargetToType(target) == TextureType::CubeMap;
+}
+
+TextureTarget NonCubeTextureTypeToTarget(TextureType type)
+{
+    switch (type)
+    {
+        case TextureType::External:
+            return TextureTarget::External;
+        case TextureType::Rectangle:
+            return TextureTarget::Rectangle;
+        case TextureType::_2D:
+            return TextureTarget::_2D;
+        case TextureType::_2DArray:
+            return TextureTarget::_2DArray;
+        case TextureType::_2DMultisample:
+            return TextureTarget::_2DMultisample;
+        case TextureType::_2DMultisampleArray:
+            return TextureTarget::_2DMultisampleArray;
+        case TextureType::_3D:
+            return TextureTarget::_3D;
+        case TextureType::CubeMapArray:
+            return TextureTarget::CubeMapArray;
+        case TextureType::VideoImage:
+            return TextureTarget::VideoImage;
+        case TextureType::Buffer:
+            return TextureTarget::Buffer;
+        default:
+            UNREACHABLE();
+            return TextureTarget::InvalidEnum;
+    }
+}
+
+// Check that we can do arithmetic on TextureTarget to convert from / to cube map faces
+static_assert(static_cast<uint8_t>(TextureTarget::CubeMapNegativeX) -
+                      static_cast<uint8_t>(TextureTarget::CubeMapPositiveX) ==
+                  1u,
+              "");
+static_assert(static_cast<uint8_t>(TextureTarget::CubeMapPositiveY) -
+                      static_cast<uint8_t>(TextureTarget::CubeMapPositiveX) ==
+                  2u,
+              "");
+static_assert(static_cast<uint8_t>(TextureTarget::CubeMapNegativeY) -
+                      static_cast<uint8_t>(TextureTarget::CubeMapPositiveX) ==
+                  3u,
+              "");
+static_assert(static_cast<uint8_t>(TextureTarget::CubeMapPositiveZ) -
+                      static_cast<uint8_t>(TextureTarget::CubeMapPositiveX) ==
+                  4u,
+              "");
+static_assert(static_cast<uint8_t>(TextureTarget::CubeMapNegativeZ) -
+                      static_cast<uint8_t>(TextureTarget::CubeMapPositiveX) ==
+                  5u,
+              "");
+
+TextureTarget CubeFaceIndexToTextureTarget(size_t face)
+{
+    ASSERT(face < 6u);
+    return static_cast<TextureTarget>(static_cast<uint8_t>(TextureTarget::CubeMapPositiveX) + face);
+}
+
+size_t CubeMapTextureTargetToFaceIndex(TextureTarget target)
+{
+    ASSERT(IsCubeMapFaceTarget(target));
+    return static_cast<uint8_t>(target) - static_cast<uint8_t>(TextureTarget::CubeMapPositiveX);
+}
+
+TextureType SamplerTypeToTextureType(GLenum samplerType)
+{
+    switch (samplerType)
+    {
+        case GL_SAMPLER_2D:
+        case GL_INT_SAMPLER_2D:
+        case GL_UNSIGNED_INT_SAMPLER_2D:
+        case GL_SAMPLER_2D_SHADOW:
+            return TextureType::_2D;
+
+        case GL_SAMPLER_EXTERNAL_OES:
+        case GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT:
+            return TextureType::External;
+
+        case GL_SAMPLER_CUBE:
+        case GL_INT_SAMPLER_CUBE:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE:
+        case GL_SAMPLER_CUBE_SHADOW:
+            return TextureType::CubeMap;
+
+        case GL_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:
+            return TextureType::CubeMapArray;
+
+        case GL_SAMPLER_2D_ARRAY:
+        case GL_INT_SAMPLER_2D_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
+        case GL_SAMPLER_2D_ARRAY_SHADOW:
+            return TextureType::_2DArray;
+
+        case GL_SAMPLER_3D:
+        case GL_INT_SAMPLER_3D:
+        case GL_UNSIGNED_INT_SAMPLER_3D:
+            return TextureType::_3D;
+
+        case GL_SAMPLER_2D_MULTISAMPLE:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:
+            return TextureType::_2DMultisample;
+
+        case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+            return TextureType::_2DMultisampleArray;
+
+        case GL_SAMPLER_BUFFER:
+        case GL_INT_SAMPLER_BUFFER:
+        case GL_UNSIGNED_INT_SAMPLER_BUFFER:
+            return TextureType::Buffer;
+
+        case GL_SAMPLER_2D_RECT_ANGLE:
+            return TextureType::Rectangle;
+
+        case GL_SAMPLER_VIDEO_IMAGE_WEBGL:
+            return TextureType::VideoImage;
+
+        default:
+            UNREACHABLE();
+            return TextureType::InvalidEnum;
+    }
+}
+
+TextureType ImageTypeToTextureType(GLenum imageType)
+{
+    switch (imageType)
+    {
+        case GL_IMAGE_2D:
+        case GL_INT_IMAGE_2D:
+        case GL_UNSIGNED_INT_IMAGE_2D:
+            return TextureType::_2D;
+
+        case GL_IMAGE_CUBE:
+        case GL_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_IMAGE_CUBE:
+            return TextureType::CubeMap;
+
+        case GL_IMAGE_CUBE_MAP_ARRAY:
+        case GL_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
+            return TextureType::CubeMapArray;
+
+        case GL_IMAGE_2D_ARRAY:
+        case GL_INT_IMAGE_2D_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+            return TextureType::_2DArray;
+
+        case GL_IMAGE_3D:
+        case GL_INT_IMAGE_3D:
+        case GL_UNSIGNED_INT_IMAGE_3D:
+            return TextureType::_3D;
+
+        case GL_IMAGE_BUFFER:
+        case GL_INT_IMAGE_BUFFER:
+        case GL_UNSIGNED_INT_IMAGE_BUFFER:
+            return TextureType::Buffer;
+
+        default:
+            UNREACHABLE();
+            return TextureType::InvalidEnum;
+    }
+}
+
+bool IsMultisampled(TextureType type)
+{
+    switch (type)
+    {
+        case TextureType::_2DMultisample:
+        case TextureType::_2DMultisampleArray:
+            return true;
+        default:
+            return false;
+    }
+}
+
+bool IsArrayTextureType(TextureType type)
+{
+    switch (type)
+    {
+        case TextureType::_2DArray:
+        case TextureType::_2DMultisampleArray:
+        case TextureType::CubeMapArray:
+            return true;
+        default:
+            return false;
+    }
+}
+
+bool IsStaticBufferUsage(BufferUsage useage)
+{
+    switch (useage)
+    {
+        case BufferUsage::StaticCopy:
+        case BufferUsage::StaticDraw:
+        case BufferUsage::StaticRead:
+            return true;
+        default:
+            return false;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, PrimitiveMode value)
+{
+    switch (value)
+    {
+        case PrimitiveMode::LineLoop:
+            os << "GL_LINE_LOOP";
+            break;
+        case PrimitiveMode::Lines:
+            os << "GL_LINES";
+            break;
+        case PrimitiveMode::LinesAdjacency:
+            os << "GL_LINES_ADJACENCY";
+            break;
+        case PrimitiveMode::LineStrip:
+            os << "GL_LINE_STRIP";
+            break;
+        case PrimitiveMode::LineStripAdjacency:
+            os << "GL_LINE_STRIP_ADJANCENCY";
+            break;
+        case PrimitiveMode::Patches:
+            os << "GL_PATCHES";
+            break;
+        case PrimitiveMode::Points:
+            os << "GL_POINTS";
+            break;
+        case PrimitiveMode::TriangleFan:
+            os << "GL_TRIANGLE_FAN";
+            break;
+        case PrimitiveMode::Triangles:
+            os << "GL_TRIANGLES";
+            break;
+        case PrimitiveMode::TrianglesAdjacency:
+            os << "GL_TRIANGLES_ADJANCENCY";
+            break;
+        case PrimitiveMode::TriangleStrip:
+            os << "GL_TRIANGLE_STRIP";
+            break;
+        case PrimitiveMode::TriangleStripAdjacency:
+            os << "GL_TRIANGLE_STRIP_ADJACENCY";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+std::ostream &operator<<(std::ostream &os, DrawElementsType value)
+{
+    switch (value)
+    {
+        case DrawElementsType::UnsignedByte:
+            os << "GL_UNSIGNED_BYTE";
+            break;
+        case DrawElementsType::UnsignedShort:
+            os << "GL_UNSIGNED_SHORT";
+            break;
+        case DrawElementsType::UnsignedInt:
+            os << "GL_UNSIGNED_INT";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+
+    return os;
+}
+
+std::ostream &operator<<(std::ostream &os, BlendEquationType value)
+{
+    switch (value)
+    {
+        case BlendEquationType::Add:
+            os << "GL_FUNC_ADD";
+            break;
+        case BlendEquationType::Min:
+            os << "GL_MIN";
+            break;
+        case BlendEquationType::Max:
+            os << "GL_MAX";
+            break;
+        case BlendEquationType::Subtract:
+            os << "GL_FUNC_SUBTRACT";
+            break;
+        case BlendEquationType::ReverseSubtract:
+            os << "GL_FUNC_REVERSE_SUBTRACT";
+            break;
+        case BlendEquationType::Multiply:
+            os << "GL_MULTIPLY_KHR";
+            break;
+        case BlendEquationType::Screen:
+            os << "GL_SCREEN_KHR";
+            break;
+        case BlendEquationType::Overlay:
+            os << "GL_OVERLAY_KHR";
+            break;
+        case BlendEquationType::Darken:
+            os << "GL_DARKEN_KHR";
+            break;
+        case BlendEquationType::Lighten:
+            os << "GL_LIGHTEN_KHR";
+            break;
+        case BlendEquationType::Colordodge:
+            os << "GL_COLORDODGE_KHR";
+            break;
+        case BlendEquationType::Colorburn:
+            os << "GL_COLORBURN_KHR";
+            break;
+        case BlendEquationType::Hardlight:
+            os << "GL_HARDLIGHT_KHR";
+            break;
+        case BlendEquationType::Softlight:
+            os << "GL_SOFTLIGHT_KHR";
+            break;
+        case BlendEquationType::Difference:
+            os << "GL_DIFFERENCE_KHR";
+            break;
+        case BlendEquationType::Exclusion:
+            os << "GL_EXCLUSION_KHR";
+            break;
+        case BlendEquationType::HslHue:
+            os << "GL_HSL_HUE_KHR";
+            break;
+        case BlendEquationType::HslSaturation:
+            os << "GL_HSL_SATURATION_KHR";
+            break;
+        case BlendEquationType::HslColor:
+            os << "GL_HSL_COLOR_KHR";
+            break;
+        case BlendEquationType::HslLuminosity:
+            os << "GL_HSL_LUMINOSITY_KHR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+
+    return os;
+}
+
+std::ostream &operator<<(std::ostream &os, BlendFactorType value)
+{
+    switch (value)
+    {
+        case BlendFactorType::Zero:
+            os << "GL_ZERO";
+            break;
+        case BlendFactorType::One:
+            os << "GL_ONE";
+            break;
+        case BlendFactorType::SrcColor:
+            os << "GL_SRC_COLOR";
+            break;
+        case BlendFactorType::OneMinusSrcColor:
+            os << "GL_ONE_MINUS_SRC_COLOR";
+            break;
+        case BlendFactorType::SrcAlpha:
+            os << "GL_SRC_ALPHA";
+            break;
+        case BlendFactorType::OneMinusSrcAlpha:
+            os << "GL_ONE_MINUS_SRC_ALPHA";
+            break;
+        case BlendFactorType::DstAlpha:
+            os << "GL_DST_ALPHA";
+            break;
+        case BlendFactorType::OneMinusDstAlpha:
+            os << "GL_ONE_MINUS_DST_ALPHA";
+            break;
+        case BlendFactorType::DstColor:
+            os << "GL_DST_COLOR";
+            break;
+        case BlendFactorType::OneMinusDstColor:
+            os << "GL_ONE_MINUS_DST_COLOR";
+            break;
+        case BlendFactorType::SrcAlphaSaturate:
+            os << "GL_SRC_ALPHA_SATURATE";
+            break;
+        case BlendFactorType::ConstantColor:
+            os << "GL_CONSTANT_COLOR";
+            break;
+        case BlendFactorType::OneMinusConstantColor:
+            os << "GL_ONE_MINUS_CONSTANT_COLOR";
+            break;
+        case BlendFactorType::ConstantAlpha:
+            os << "GL_CONSTANT_ALPHA";
+            break;
+        case BlendFactorType::OneMinusConstantAlpha:
+            os << "GL_ONE_MINUS_CONSTANT_ALPHA";
+            break;
+        case BlendFactorType::Src1Alpha:
+            os << "GL_SRC1_ALPHA_EXT";
+            break;
+        case BlendFactorType::Src1Color:
+            os << "GL_SRC1_COLOR_EXT";
+            break;
+        case BlendFactorType::OneMinusSrc1Color:
+            os << "GL_ONE_MINUS_SRC1_COLOR_EXT";
+            break;
+        case BlendFactorType::OneMinusSrc1Alpha:
+            os << "GL_ONE_MINUS_SRC1_ALPHA_EXT";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+
+    return os;
+}
+
+std::ostream &operator<<(std::ostream &os, VertexAttribType value)
+{
+    switch (value)
+    {
+        case VertexAttribType::Byte:
+            os << "GL_BYTE";
+            break;
+        case VertexAttribType::Fixed:
+            os << "GL_FIXED";
+            break;
+        case VertexAttribType::Float:
+            os << "GL_FLOAT";
+            break;
+        case VertexAttribType::HalfFloat:
+            os << "GL_HALF_FLOAT";
+            break;
+        case VertexAttribType::HalfFloatOES:
+            os << "GL_HALF_FLOAT_OES";
+            break;
+        case VertexAttribType::Int:
+            os << "GL_INT";
+            break;
+        case VertexAttribType::Int2101010:
+            os << "GL_INT_2_10_10_10_REV";
+            break;
+        case VertexAttribType::Int1010102:
+            os << "GL_INT_10_10_10_2_OES";
+            break;
+        case VertexAttribType::Short:
+            os << "GL_SHORT";
+            break;
+        case VertexAttribType::UnsignedByte:
+            os << "GL_UNSIGNED_BYTE";
+            break;
+        case VertexAttribType::UnsignedInt:
+            os << "GL_UNSIGNED_INT";
+            break;
+        case VertexAttribType::UnsignedInt2101010:
+            os << "GL_UNSIGNED_INT_2_10_10_10_REV";
+            break;
+        case VertexAttribType::UnsignedInt1010102:
+            os << "GL_UNSIGNED_INT_10_10_10_2_OES";
+            break;
+        case VertexAttribType::UnsignedShort:
+            os << "GL_UNSIGNED_SHORT";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+std::ostream &operator<<(std::ostream &os, TessEvaluationType value)
+{
+    switch (value)
+    {
+        case TessEvaluationType::Triangles:
+            os << "GL_TRIANGLES";
+            break;
+        case TessEvaluationType::Quads:
+            os << "GL_QUADS";
+            break;
+        case TessEvaluationType::Isolines:
+            os << "GL_ISOLINES";
+            break;
+        case TessEvaluationType::EqualSpacing:
+            os << "GL_EQUAL";
+            break;
+        case TessEvaluationType::FractionalEvenSpacing:
+            os << "GL_FRACTIONAL_EVEN";
+            break;
+        case TessEvaluationType::FractionalOddSpacing:
+            os << "GL_FRACTIONAL_ODD";
+            break;
+        case TessEvaluationType::Cw:
+            os << "GL_CW";
+            break;
+        case TessEvaluationType::Ccw:
+            os << "GL_CCW";
+            break;
+        case TessEvaluationType::PointMode:
+            os << "GL_TESS_GEN_POINT_MODE";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+const char *ShaderTypeToString(ShaderType shaderType)
+{
+    constexpr ShaderMap<const char *> kShaderTypeNameMap = {
+        {ShaderType::Vertex, "Vertex"},
+        {ShaderType::TessControl, "Tessellation control"},
+        {ShaderType::TessEvaluation, "Tessellation evaluation"},
+        {ShaderType::Geometry, "Geometry"},
+        {ShaderType::Fragment, "Fragment"},
+        {ShaderType::Compute, "Compute"}};
+    return kShaderTypeNameMap[shaderType];
+}
+
+bool operator<(const UniformLocation &lhs, const UniformLocation &rhs)
+{
+    return lhs.value < rhs.value;
+}
+
+bool IsEmulatedCompressedFormat(GLenum format)
+{
+    // TODO(anglebug.com/6177): Check for all formats ANGLE will use to emulate a compressed texture
+    return format == GL_RGBA || format == GL_RG || format == GL_RED;
+}
+}  // namespace gl
+
+namespace egl
+{
+MessageType ErrorCodeToMessageType(EGLint errorCode)
+{
+    switch (errorCode)
+    {
+        case EGL_BAD_ALLOC:
+        case EGL_CONTEXT_LOST:
+        case EGL_NOT_INITIALIZED:
+            return MessageType::Critical;
+
+        case EGL_BAD_ACCESS:
+        case EGL_BAD_ATTRIBUTE:
+        case EGL_BAD_CONFIG:
+        case EGL_BAD_CONTEXT:
+        case EGL_BAD_CURRENT_SURFACE:
+        case EGL_BAD_DISPLAY:
+        case EGL_BAD_MATCH:
+        case EGL_BAD_NATIVE_PIXMAP:
+        case EGL_BAD_NATIVE_WINDOW:
+        case EGL_BAD_PARAMETER:
+        case EGL_BAD_SURFACE:
+        case EGL_BAD_STREAM_KHR:
+        case EGL_BAD_STATE_KHR:
+        case EGL_BAD_DEVICE_EXT:
+            return MessageType::Error;
+
+        case EGL_SUCCESS:
+        default:
+            UNREACHABLE();
+            return MessageType::InvalidEnum;
+    }
+}
+}  // namespace egl
+
+namespace egl_gl
+{
+
+gl::TextureTarget EGLCubeMapTargetToCubeMapTarget(EGLenum eglTarget)
+{
+    ASSERT(egl::IsCubeMapTextureTarget(eglTarget));
+    return gl::CubeFaceIndexToTextureTarget(egl::CubeMapTextureTargetToLayerIndex(eglTarget));
+}
+
+gl::TextureTarget EGLImageTargetToTextureTarget(EGLenum eglTarget)
+{
+    switch (eglTarget)
+    {
+        case EGL_GL_TEXTURE_2D_KHR:
+            return gl::TextureTarget::_2D;
+
+        case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR:
+            return EGLCubeMapTargetToCubeMapTarget(eglTarget);
+
+        case EGL_GL_TEXTURE_3D_KHR:
+            return gl::TextureTarget::_3D;
+
+        default:
+            UNREACHABLE();
+            return gl::TextureTarget::InvalidEnum;
+    }
+}
+
+gl::TextureType EGLTextureTargetToTextureType(EGLenum eglTarget)
+{
+    switch (eglTarget)
+    {
+        case EGL_TEXTURE_2D:
+            return gl::TextureType::_2D;
+
+        case EGL_TEXTURE_RECTANGLE_ANGLE:
+            return gl::TextureType::Rectangle;
+
+        default:
+            UNREACHABLE();
+            return gl::TextureType::InvalidEnum;
+    }
+}
+}  // namespace egl_gl
diff --git a/gfx/angle/checkout/src/common/PackedEnums.h b/gfx/angle/checkout/src/common/PackedEnums.h
new file mode 100644
index 0000000000..81fa6d6f42
--- /dev/null
+++ b/gfx/angle/checkout/src/common/PackedEnums.h
@@ -0,0 +1,859 @@
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// PackedGLEnums_autogen.h:
+//   Declares ANGLE-specific enums classes for GLEnum and functions operating
+//   on them.
+
+#ifndef COMMON_PACKEDGLENUMS_H_
+#define COMMON_PACKEDGLENUMS_H_
+
+#include "common/PackedEGLEnums_autogen.h"
+#include "common/PackedGLEnums_autogen.h"
+
+#include <array>
+#include <bitset>
+#include <cstddef>
+
+#include <EGL/egl.h>
+
+#include "common/bitset_utils.h"
+
+namespace angle
+{
+
+// Return the number of elements of a packed enum, including the InvalidEnum element.
+template <typename E>
+constexpr size_t EnumSize()
+{
+    using UnderlyingType = typename std::underlying_type<E>::type;
+    return static_cast<UnderlyingType>(E::EnumCount);
+}
+
+// Implementation of AllEnums which allows iterating over all the possible values for a packed enums
+// like so:
+//     for (auto value : AllEnums<MyPackedEnum>()) {
+//         // Do something with the enum.
+//     }
+
+template <typename E>
+class EnumIterator final
+{
+  private:
+    using UnderlyingType = typename std::underlying_type<E>::type;
+
+  public:
+    EnumIterator(E value) : mValue(static_cast<UnderlyingType>(value)) {}
+    EnumIterator &operator++()
+    {
+        mValue++;
+        return *this;
+    }
+    bool operator==(const EnumIterator &other) const { return mValue == other.mValue; }
+    bool operator!=(const EnumIterator &other) const { return mValue != other.mValue; }
+    E operator*() const { return static_cast<E>(mValue); }
+
+  private:
+    UnderlyingType mValue;
+};
+
+template <typename E, size_t MaxSize = EnumSize<E>()>
+struct AllEnums
+{
+    EnumIterator<E> begin() const { return {static_cast<E>(0)}; }
+    EnumIterator<E> end() const { return {static_cast<E>(MaxSize)}; }
+};
+
+// PackedEnumMap<E, T> is like an std::array<T, E::EnumCount> but is indexed with enum values. It
+// implements all of the std::array interface except with enum values instead of indices.
+template <typename E, typename T, size_t MaxSize = EnumSize<E>()>
+class PackedEnumMap
+{
+    using UnderlyingType = typename std::underlying_type<E>::type;
+    using Storage        = std::array<T, MaxSize>;
+
+  public:
+    using InitPair = std::pair<E, T>;
+
+    constexpr PackedEnumMap() = default;
+
+    constexpr PackedEnumMap(std::initializer_list<InitPair> init) : mPrivateData{}
+    {
+        // We use a for loop instead of range-for to work around a limitation in MSVC.
+        for (const InitPair *it = init.begin(); it != init.end(); ++it)
+        {
+            mPrivateData[static_cast<UnderlyingType>(it->first)] = it->second;
+        }
+    }
+
+    // types:
+    using value_type      = T;
+    using pointer         = T *;
+    using const_pointer   = const T *;
+    using reference       = T &;
+    using const_reference = const T &;
+
+    using size_type       = size_t;
+    using difference_type = ptrdiff_t;
+
+    using iterator               = typename Storage::iterator;
+    using const_iterator         = typename Storage::const_iterator;
+    using reverse_iterator       = std::reverse_iterator<iterator>;
+    using const_reverse_iterator = std::reverse_iterator<const_iterator>;
+
+    // No explicit construct/copy/destroy for aggregate type
+    void fill(const T &u) { mPrivateData.fill(u); }
+    void swap(PackedEnumMap<E, T, MaxSize> &a) noexcept { mPrivateData.swap(a.mPrivateData); }
+
+    // iterators:
+    iterator begin() noexcept { return mPrivateData.begin(); }
+    const_iterator begin() const noexcept { return mPrivateData.begin(); }
+    iterator end() noexcept { return mPrivateData.end(); }
+    const_iterator end() const noexcept { return mPrivateData.end(); }
+
+    reverse_iterator rbegin() noexcept { return mPrivateData.rbegin(); }
+    const_reverse_iterator rbegin() const noexcept { return mPrivateData.rbegin(); }
+    reverse_iterator rend() noexcept { return mPrivateData.rend(); }
+    const_reverse_iterator rend() const noexcept { return mPrivateData.rend(); }
+
+    // capacity:
+    constexpr size_type size() const noexcept { return mPrivateData.size(); }
+    constexpr size_type max_size() const noexcept { return mPrivateData.max_size(); }
+    constexpr bool empty() const noexcept { return mPrivateData.empty(); }
+
+    // element access:
+    reference operator[](E n)
+    {
+        ASSERT(static_cast<size_t>(n) < mPrivateData.size());
+        return mPrivateData[static_cast<UnderlyingType>(n)];
+    }
+
+    constexpr const_reference operator[](E n) const
+    {
+        ASSERT(static_cast<size_t>(n) < mPrivateData.size());
+        return mPrivateData[static_cast<UnderlyingType>(n)];
+    }
+
+    const_reference at(E n) const { return mPrivateData.at(static_cast<UnderlyingType>(n)); }
+    reference at(E n) { return mPrivateData.at(static_cast<UnderlyingType>(n)); }
+
+    reference front() { return mPrivateData.front(); }
+    const_reference front() const { return mPrivateData.front(); }
+    reference back() { return mPrivateData.back(); }
+    const_reference back() const { return mPrivateData.back(); }
+
+    T *data() noexcept { return mPrivateData.data(); }
+    const T *data() const noexcept { return mPrivateData.data(); }
+
+    bool operator==(const PackedEnumMap &rhs) const { return mPrivateData == rhs.mPrivateData; }
+    bool operator!=(const PackedEnumMap &rhs) const { return mPrivateData != rhs.mPrivateData; }
+
+    template <typename SubT = T>
+    typename std::enable_if<std::is_integral<SubT>::value>::type operator+=(
+        const PackedEnumMap<E, SubT, MaxSize> &rhs)
+    {
+        for (E e : AllEnums<E, MaxSize>())
+        {
+            at(e) += rhs[e];
+        }
+    }
+
+  private:
+    Storage mPrivateData;
+};
+
+// PackedEnumBitSetE> is like an std::bitset<E::EnumCount> but is indexed with enum values. It
+// implements the std::bitset interface except with enum values instead of indices.
+template <typename E, typename DataT = uint32_t>
+using PackedEnumBitSet = BitSetT<EnumSize<E>(), DataT, E>;
+
+}  // namespace angle
+
+namespace gl
+{
+
+TextureType TextureTargetToType(TextureTarget target);
+TextureTarget NonCubeTextureTypeToTarget(TextureType type);
+
+TextureTarget CubeFaceIndexToTextureTarget(size_t face);
+size_t CubeMapTextureTargetToFaceIndex(TextureTarget target);
+bool IsCubeMapFaceTarget(TextureTarget target);
+
+constexpr TextureTarget kCubeMapTextureTargetMin = TextureTarget::CubeMapPositiveX;
+constexpr TextureTarget kCubeMapTextureTargetMax = TextureTarget::CubeMapNegativeZ;
+constexpr TextureTarget kAfterCubeMapTextureTargetMax =
+    static_cast<TextureTarget>(static_cast<uint8_t>(kCubeMapTextureTargetMax) + 1);
+struct AllCubeFaceTextureTargets
+{
+    angle::EnumIterator<TextureTarget> begin() const { return kCubeMapTextureTargetMin; }
+    angle::EnumIterator<TextureTarget> end() const { return kAfterCubeMapTextureTargetMax; }
+};
+
+constexpr std::array<ShaderType, 2> kAllGLES2ShaderTypes = {ShaderType::Vertex,
+                                                            ShaderType::Fragment};
+
+constexpr ShaderType kShaderTypeMin = ShaderType::Vertex;
+constexpr ShaderType kShaderTypeMax = ShaderType::Compute;
+constexpr ShaderType kAfterShaderTypeMax =
+    static_cast<ShaderType>(static_cast<uint8_t>(kShaderTypeMax) + 1);
+struct AllShaderTypes
+{
+    angle::EnumIterator<ShaderType> begin() const { return kShaderTypeMin; }
+    angle::EnumIterator<ShaderType> end() const { return kAfterShaderTypeMax; }
+};
+
+constexpr size_t kGraphicsShaderCount = static_cast<size_t>(ShaderType::EnumCount) - 1u;
+// Arrange the shader types in the order of rendering pipeline
+constexpr std::array<ShaderType, kGraphicsShaderCount> kAllGraphicsShaderTypes = {
+    ShaderType::Vertex, ShaderType::TessControl, ShaderType::TessEvaluation, ShaderType::Geometry,
+    ShaderType::Fragment};
+
+using ShaderBitSet = angle::PackedEnumBitSet<ShaderType, uint8_t>;
+static_assert(sizeof(ShaderBitSet) == sizeof(uint8_t), "Unexpected size");
+
+template <typename T>
+using ShaderMap = angle::PackedEnumMap<ShaderType, T>;
+
+const char *ShaderTypeToString(ShaderType shaderType);
+
+TextureType SamplerTypeToTextureType(GLenum samplerType);
+TextureType ImageTypeToTextureType(GLenum imageType);
+
+bool IsMultisampled(gl::TextureType type);
+bool IsArrayTextureType(gl::TextureType type);
+
+bool IsStaticBufferUsage(BufferUsage useage);
+
+enum class PrimitiveMode : uint8_t
+{
+    Points                 = 0x0,
+    Lines                  = 0x1,
+    LineLoop               = 0x2,
+    LineStrip              = 0x3,
+    Triangles              = 0x4,
+    TriangleStrip          = 0x5,
+    TriangleFan            = 0x6,
+    Unused1                = 0x7,
+    Unused2                = 0x8,
+    Unused3                = 0x9,
+    LinesAdjacency         = 0xA,
+    LineStripAdjacency     = 0xB,
+    TrianglesAdjacency     = 0xC,
+    TriangleStripAdjacency = 0xD,
+    Patches                = 0xE,
+
+    InvalidEnum = 0xF,
+    EnumCount   = 0xF,
+};
+
+template <>
+constexpr PrimitiveMode FromGLenum<PrimitiveMode>(GLenum from)
+{
+    if (from >= static_cast<GLenum>(PrimitiveMode::EnumCount))
+    {
+        return PrimitiveMode::InvalidEnum;
+    }
+
+    return static_cast<PrimitiveMode>(from);
+}
+
+constexpr GLenum ToGLenum(PrimitiveMode from)
+{
+    return static_cast<GLenum>(from);
+}
+
+static_assert(ToGLenum(PrimitiveMode::Points) == GL_POINTS, "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::Lines) == GL_LINES, "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::LineLoop) == GL_LINE_LOOP, "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::LineStrip) == GL_LINE_STRIP, "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::Triangles) == GL_TRIANGLES, "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::TriangleStrip) == GL_TRIANGLE_STRIP,
+              "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::TriangleFan) == GL_TRIANGLE_FAN, "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::LinesAdjacency) == GL_LINES_ADJACENCY,
+              "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::LineStripAdjacency) == GL_LINE_STRIP_ADJACENCY,
+              "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::TrianglesAdjacency) == GL_TRIANGLES_ADJACENCY,
+              "PrimitiveMode violation");
+static_assert(ToGLenum(PrimitiveMode::TriangleStripAdjacency) == GL_TRIANGLE_STRIP_ADJACENCY,
+              "PrimitiveMode violation");
+
+std::ostream &operator<<(std::ostream &os, PrimitiveMode value);
+
+enum class DrawElementsType : size_t
+{
+    UnsignedByte  = 0,
+    UnsignedShort = 1,
+    UnsignedInt   = 2,
+    InvalidEnum   = 3,
+    EnumCount     = 3,
+};
+
+template <>
+constexpr DrawElementsType FromGLenum<DrawElementsType>(GLenum from)
+{
+
+    GLenum scaled = (from - GL_UNSIGNED_BYTE);
+    // This code sequence generates a ROR instruction on x86/arm. We want to check if the lowest bit
+    // of scaled is set and if (scaled >> 1) is greater than a non-pot value. If we rotate the
+    // lowest bit to the hightest bit both conditions can be checked with a single test.
+    static_assert(sizeof(GLenum) == 4, "Update (scaled << 31) to sizeof(GLenum) * 8 - 1");
+    GLenum packed = (scaled >> 1) | (scaled << 31);
+
+    // operator ? with a simple assignment usually translates to a cmov instruction and thus avoids
+    // a branch.
+    packed = (packed >= static_cast<GLenum>(DrawElementsType::EnumCount))
+                 ? static_cast<GLenum>(DrawElementsType::InvalidEnum)
+                 : packed;
+
+    return static_cast<DrawElementsType>(packed);
+}
+
+constexpr GLenum ToGLenum(DrawElementsType from)
+{
+    return ((static_cast<GLenum>(from) << 1) + GL_UNSIGNED_BYTE);
+}
+
+#define ANGLE_VALIDATE_PACKED_ENUM(type, packed, glenum)                 \
+    static_assert(ToGLenum(type::packed) == glenum, #type " violation"); \
+    static_assert(FromGLenum<type>(glenum) == type::packed, #type " violation")
+
+ANGLE_VALIDATE_PACKED_ENUM(DrawElementsType, UnsignedByte, GL_UNSIGNED_BYTE);
+ANGLE_VALIDATE_PACKED_ENUM(DrawElementsType, UnsignedShort, GL_UNSIGNED_SHORT);
+ANGLE_VALIDATE_PACKED_ENUM(DrawElementsType, UnsignedInt, GL_UNSIGNED_INT);
+
+std::ostream &operator<<(std::ostream &os, DrawElementsType value);
+
+enum class BlendEquationType
+{
+    Add             = 0,  // GLenum == 0x8006
+    Min             = 1,  // GLenum == 0x8007
+    Max             = 2,  // GLenum == 0x8008
+    Unused          = 3,
+    Subtract        = 4,  // GLenum == 0x800A
+    ReverseSubtract = 5,  // GLenum == 0x800B
+
+    Multiply   = 6,   // GLenum == 0x9294
+    Screen     = 7,   // GLenum == 0x9295
+    Overlay    = 8,   // GLenum == 0x9296
+    Darken     = 9,   // GLenum == 0x9297
+    Lighten    = 10,  // GLenum == 0x9298
+    Colordodge = 11,  // GLenum == 0x9299
+    Colorburn  = 12,  // GLenum == 0x929A
+    Hardlight  = 13,  // GLenum == 0x929B
+    Softlight  = 14,  // GLenum == 0x929C
+    Unused2    = 15,
+    Difference = 16,  // GLenum == 0x929E
+    Unused3    = 17,
+    Exclusion  = 18,  // GLenum == 0x92A0
+
+    HslHue        = 19,  // GLenum == 0x92AD
+    HslSaturation = 20,  // GLenum == 0x92AE
+    HslColor      = 21,  // GLenum == 0x92AF
+    HslLuminosity = 22,  // GLenum == 0x92B0
+
+    InvalidEnum = 23,
+    EnumCount   = InvalidEnum
+};
+
+using BlendEquationBitSet = angle::PackedEnumBitSet<gl::BlendEquationType>;
+
+template <>
+constexpr BlendEquationType FromGLenum<BlendEquationType>(GLenum from)
+{
+    if (from <= GL_FUNC_REVERSE_SUBTRACT)
+    {
+        const GLenum scaled = (from - GL_FUNC_ADD);
+        return (scaled == static_cast<GLenum>(BlendEquationType::Unused))
+                   ? BlendEquationType::InvalidEnum
+                   : static_cast<BlendEquationType>(scaled);
+    }
+    if (from <= GL_EXCLUSION_KHR)
+    {
+        const GLenum scaled =
+            (from - GL_MULTIPLY_KHR + static_cast<uint32_t>(BlendEquationType::Multiply));
+        return (scaled == static_cast<GLenum>(BlendEquationType::Unused2) ||
+                scaled == static_cast<GLenum>(BlendEquationType::Unused3))
+                   ? BlendEquationType::InvalidEnum
+                   : static_cast<BlendEquationType>(scaled);
+    }
+    if (from <= GL_HSL_LUMINOSITY_KHR)
+    {
+        return static_cast<BlendEquationType>(from - GL_HSL_HUE_KHR +
+                                              static_cast<uint32_t>(BlendEquationType::HslHue));
+    }
+    return BlendEquationType::InvalidEnum;
+}
+
+constexpr GLenum ToGLenum(BlendEquationType from)
+{
+    if (from <= BlendEquationType::ReverseSubtract)
+    {
+        return static_cast<GLenum>(from) + GL_FUNC_ADD;
+    }
+    if (from <= BlendEquationType::Exclusion)
+    {
+        return static_cast<GLenum>(from) - static_cast<GLenum>(BlendEquationType::Multiply) +
+               GL_MULTIPLY_KHR;
+    }
+    return static_cast<GLenum>(from) - static_cast<GLenum>(BlendEquationType::HslHue) +
+           GL_HSL_HUE_KHR;
+}
+
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Add, GL_FUNC_ADD);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Min, GL_MIN);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Max, GL_MAX);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Subtract, GL_FUNC_SUBTRACT);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, ReverseSubtract, GL_FUNC_REVERSE_SUBTRACT);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Multiply, GL_MULTIPLY_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Screen, GL_SCREEN_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Overlay, GL_OVERLAY_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Darken, GL_DARKEN_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Lighten, GL_LIGHTEN_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Colordodge, GL_COLORDODGE_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Colorburn, GL_COLORBURN_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Hardlight, GL_HARDLIGHT_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Softlight, GL_SOFTLIGHT_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Difference, GL_DIFFERENCE_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, Exclusion, GL_EXCLUSION_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, HslHue, GL_HSL_HUE_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, HslSaturation, GL_HSL_SATURATION_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, HslColor, GL_HSL_COLOR_KHR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendEquationType, HslLuminosity, GL_HSL_LUMINOSITY_KHR);
+
+std::ostream &operator<<(std::ostream &os, BlendEquationType value);
+
+enum class BlendFactorType
+{
+    Zero = 0,  // GLenum == 0
+    One  = 1,  // GLenum == 1
+
+    MinSrcDstType    = 2,
+    SrcColor         = 2,   // GLenum == 0x0300
+    OneMinusSrcColor = 3,   // GLenum == 0x0301
+    SrcAlpha         = 4,   // GLenum == 0x0302
+    OneMinusSrcAlpha = 5,   // GLenum == 0x0303
+    DstAlpha         = 6,   // GLenum == 0x0304
+    OneMinusDstAlpha = 7,   // GLenum == 0x0305
+    DstColor         = 8,   // GLenum == 0x0306
+    OneMinusDstColor = 9,   // GLenum == 0x0307
+    SrcAlphaSaturate = 10,  // GLenum == 0x0308
+    MaxSrcDstType    = 10,
+
+    MinConstantType       = 11,
+    ConstantColor         = 11,  // GLenum == 0x8001
+    OneMinusConstantColor = 12,  // GLenum == 0x8002
+    ConstantAlpha         = 13,  // GLenum == 0x8003
+    OneMinusConstantAlpha = 14,  // GLenum == 0x8004
+    MaxConstantType       = 14,
+
+    // GL_EXT_blend_func_extended
+
+    Src1Alpha = 15,  // GLenum == 0x8589
+
+    Src1Color         = 16,  // GLenum == 0x88F9
+    OneMinusSrc1Color = 17,  // GLenum == 0x88FA
+    OneMinusSrc1Alpha = 18,  // GLenum == 0x88FB
+
+    InvalidEnum = 19,
+    EnumCount   = 19
+};
+
+template <>
+constexpr BlendFactorType FromGLenum<BlendFactorType>(GLenum from)
+{
+    if (from <= 1)
+        return static_cast<BlendFactorType>(from);
+    if (from >= GL_SRC_COLOR && from <= GL_SRC_ALPHA_SATURATE)
+        return static_cast<BlendFactorType>(from - GL_SRC_COLOR + 2);
+    if (from >= GL_CONSTANT_COLOR && from <= GL_ONE_MINUS_CONSTANT_ALPHA)
+        return static_cast<BlendFactorType>(from - GL_CONSTANT_COLOR + 11);
+    if (from == GL_SRC1_ALPHA_EXT)
+        return BlendFactorType::Src1Alpha;
+    if (from >= GL_SRC1_COLOR_EXT && from <= GL_ONE_MINUS_SRC1_ALPHA_EXT)
+        return static_cast<BlendFactorType>(from - GL_SRC1_COLOR_EXT + 16);
+    return BlendFactorType::InvalidEnum;
+}
+
+constexpr GLenum ToGLenum(BlendFactorType from)
+{
+    const GLenum value = static_cast<GLenum>(from);
+    if (value <= 1)
+        return value;
+    if (from >= BlendFactorType::MinSrcDstType && from <= BlendFactorType::MaxSrcDstType)
+        return value - 2 + GL_SRC_COLOR;
+    if (from >= BlendFactorType::MinConstantType && from <= BlendFactorType::MaxConstantType)
+        return value - 11 + GL_CONSTANT_COLOR;
+    if (from == BlendFactorType::Src1Alpha)
+        return GL_SRC1_ALPHA_EXT;
+    return value - 16 + GL_SRC1_COLOR_EXT;
+}
+
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, Zero, GL_ZERO);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, One, GL_ONE);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, SrcColor, GL_SRC_COLOR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, OneMinusSrcColor, GL_ONE_MINUS_SRC_COLOR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, SrcAlpha, GL_SRC_ALPHA);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, OneMinusSrcAlpha, GL_ONE_MINUS_SRC_ALPHA);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, DstAlpha, GL_DST_ALPHA);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, OneMinusDstAlpha, GL_ONE_MINUS_DST_ALPHA);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, DstColor, GL_DST_COLOR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, OneMinusDstColor, GL_ONE_MINUS_DST_COLOR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, SrcAlphaSaturate, GL_SRC_ALPHA_SATURATE);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, ConstantColor, GL_CONSTANT_COLOR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, OneMinusConstantColor, GL_ONE_MINUS_CONSTANT_COLOR);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, ConstantAlpha, GL_CONSTANT_ALPHA);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, OneMinusConstantAlpha, GL_ONE_MINUS_CONSTANT_ALPHA);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, Src1Alpha, GL_SRC1_ALPHA_EXT);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, Src1Color, GL_SRC1_COLOR_EXT);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, OneMinusSrc1Color, GL_ONE_MINUS_SRC1_COLOR_EXT);
+ANGLE_VALIDATE_PACKED_ENUM(BlendFactorType, OneMinusSrc1Alpha, GL_ONE_MINUS_SRC1_ALPHA_EXT);
+
+std::ostream &operator<<(std::ostream &os, BlendFactorType value);
+
+enum class VertexAttribType
+{
+    Byte               = 0,   // GLenum == 0x1400
+    UnsignedByte       = 1,   // GLenum == 0x1401
+    Short              = 2,   // GLenum == 0x1402
+    UnsignedShort      = 3,   // GLenum == 0x1403
+    Int                = 4,   // GLenum == 0x1404
+    UnsignedInt        = 5,   // GLenum == 0x1405
+    Float              = 6,   // GLenum == 0x1406
+    Unused1            = 7,   // GLenum == 0x1407
+    Unused2            = 8,   // GLenum == 0x1408
+    Unused3            = 9,   // GLenum == 0x1409
+    Unused4            = 10,  // GLenum == 0x140A
+    HalfFloat          = 11,  // GLenum == 0x140B
+    Fixed              = 12,  // GLenum == 0x140C
+    MaxBasicType       = 12,
+    UnsignedInt2101010 = 13,  // GLenum == 0x8368
+    HalfFloatOES       = 14,  // GLenum == 0x8D61
+    Int2101010         = 15,  // GLenum == 0x8D9F
+    UnsignedInt1010102 = 16,  // GLenum == 0x8DF6
+    Int1010102         = 17,  // GLenum == 0x8DF7
+    InvalidEnum        = 18,
+    EnumCount          = 18,
+};
+
+template <>
+constexpr VertexAttribType FromGLenum<VertexAttribType>(GLenum from)
+{
+    GLenum packed = from - GL_BYTE;
+    if (packed <= static_cast<GLenum>(VertexAttribType::MaxBasicType))
+        return static_cast<VertexAttribType>(packed);
+    if (from == GL_UNSIGNED_INT_2_10_10_10_REV)
+        return VertexAttribType::UnsignedInt2101010;
+    if (from == GL_HALF_FLOAT_OES)
+        return VertexAttribType::HalfFloatOES;
+    if (from == GL_INT_2_10_10_10_REV)
+        return VertexAttribType::Int2101010;
+    if (from == GL_UNSIGNED_INT_10_10_10_2_OES)
+        return VertexAttribType::UnsignedInt1010102;
+    if (from == GL_INT_10_10_10_2_OES)
+        return VertexAttribType::Int1010102;
+    return VertexAttribType::InvalidEnum;
+}
+
+constexpr GLenum ToGLenum(VertexAttribType from)
+{
+    // This could be optimized using a constexpr table.
+    if (from == VertexAttribType::Int2101010)
+        return GL_INT_2_10_10_10_REV;
+    if (from == VertexAttribType::HalfFloatOES)
+        return GL_HALF_FLOAT_OES;
+    if (from == VertexAttribType::UnsignedInt2101010)
+        return GL_UNSIGNED_INT_2_10_10_10_REV;
+    if (from == VertexAttribType::UnsignedInt1010102)
+        return GL_UNSIGNED_INT_10_10_10_2_OES;
+    if (from == VertexAttribType::Int1010102)
+        return GL_INT_10_10_10_2_OES;
+    return static_cast<GLenum>(from) + GL_BYTE;
+}
+
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, Byte, GL_BYTE);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, UnsignedByte, GL_UNSIGNED_BYTE);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, Short, GL_SHORT);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, UnsignedShort, GL_UNSIGNED_SHORT);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, Int, GL_INT);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, UnsignedInt, GL_UNSIGNED_INT);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, Float, GL_FLOAT);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, HalfFloat, GL_HALF_FLOAT);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, Fixed, GL_FIXED);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, Int2101010, GL_INT_2_10_10_10_REV);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, HalfFloatOES, GL_HALF_FLOAT_OES);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, UnsignedInt2101010, GL_UNSIGNED_INT_2_10_10_10_REV);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, Int1010102, GL_INT_10_10_10_2_OES);
+ANGLE_VALIDATE_PACKED_ENUM(VertexAttribType, UnsignedInt1010102, GL_UNSIGNED_INT_10_10_10_2_OES);
+
+std::ostream &operator<<(std::ostream &os, VertexAttribType value);
+
+enum class TessEvaluationType
+{
+    Triangles             = 0,
+    Quads                 = 1,
+    Isolines              = 2,
+    EqualSpacing          = 3,
+    FractionalEvenSpacing = 4,
+    FractionalOddSpacing  = 5,
+    Cw                    = 6,
+    Ccw                   = 7,
+    PointMode             = 8,
+    InvalidEnum           = 9,
+    EnumCount             = 9
+};
+
+template <>
+constexpr TessEvaluationType FromGLenum<TessEvaluationType>(GLenum from)
+{
+    if (from == GL_TRIANGLES)
+        return TessEvaluationType::Triangles;
+    if (from == GL_QUADS)
+        return TessEvaluationType::Quads;
+    if (from == GL_ISOLINES)
+        return TessEvaluationType::Isolines;
+    if (from == GL_EQUAL)
+        return TessEvaluationType::EqualSpacing;
+    if (from == GL_FRACTIONAL_EVEN)
+        return TessEvaluationType::FractionalEvenSpacing;
+    if (from == GL_FRACTIONAL_ODD)
+        return TessEvaluationType::FractionalOddSpacing;
+    if (from == GL_CW)
+        return TessEvaluationType::Cw;
+    if (from == GL_CCW)
+        return TessEvaluationType::Ccw;
+    if (from == GL_TESS_GEN_POINT_MODE)
+        return TessEvaluationType::PointMode;
+    return TessEvaluationType::InvalidEnum;
+}
+
+constexpr GLenum ToGLenum(TessEvaluationType from)
+{
+    switch (from)
+    {
+        case TessEvaluationType::Triangles:
+            return GL_TRIANGLES;
+        case TessEvaluationType::Quads:
+            return GL_QUADS;
+        case TessEvaluationType::Isolines:
+            return GL_ISOLINES;
+        case TessEvaluationType::EqualSpacing:
+            return GL_EQUAL;
+        case TessEvaluationType::FractionalEvenSpacing:
+            return GL_FRACTIONAL_EVEN;
+        case TessEvaluationType::FractionalOddSpacing:
+            return GL_FRACTIONAL_ODD;
+        case TessEvaluationType::Cw:
+            return GL_CW;
+        case TessEvaluationType::Ccw:
+            return GL_CCW;
+        case TessEvaluationType::PointMode:
+            return GL_TESS_GEN_POINT_MODE;
+        default:
+            return GL_INVALID_ENUM;
+    }
+}
+
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, Triangles, GL_TRIANGLES);
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, Quads, GL_QUADS);
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, Isolines, GL_ISOLINES);
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, EqualSpacing, GL_EQUAL);
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, FractionalEvenSpacing, GL_FRACTIONAL_EVEN);
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, FractionalOddSpacing, GL_FRACTIONAL_ODD);
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, Cw, GL_CW);
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, Ccw, GL_CCW);
+ANGLE_VALIDATE_PACKED_ENUM(TessEvaluationType, PointMode, GL_TESS_GEN_POINT_MODE);
+
+std::ostream &operator<<(std::ostream &os, TessEvaluationType value);
+
+// Typesafe object handles.
+
+template <typename T>
+struct ResourceTypeToID;
+
+template <typename T>
+struct IsResourceIDType;
+
+// Clang Format doesn't like the following X macro.
+// clang-format off
+#define ANGLE_ID_TYPES_OP(X) \
+    X(Buffer)                \
+    X(FenceNV)               \
+    X(Framebuffer)           \
+    X(MemoryObject)          \
+    X(Path)                  \
+    X(ProgramPipeline)       \
+    X(Query)                 \
+    X(Renderbuffer)          \
+    X(Sampler)               \
+    X(Semaphore)             \
+    X(Texture)               \
+    X(TransformFeedback)     \
+    X(VertexArray)
+// clang-format on
+
+#define ANGLE_DEFINE_ID_TYPE(Type)          \
+    class Type;                             \
+    struct Type##ID                         \
+    {                                       \
+        GLuint value;                       \
+    };                                      \
+    template <>                             \
+    struct ResourceTypeToID<Type>           \
+    {                                       \
+        using IDType = Type##ID;            \
+    };                                      \
+    template <>                             \
+    struct IsResourceIDType<Type##ID>       \
+    {                                       \
+        static constexpr bool value = true; \
+    };
+
+ANGLE_ID_TYPES_OP(ANGLE_DEFINE_ID_TYPE)
+
+#undef ANGLE_DEFINE_ID_TYPE
+#undef ANGLE_ID_TYPES_OP
+
+// Shaders and programs are a bit special as they share IDs.
+struct ShaderProgramID
+{
+    GLuint value;
+};
+
+template <>
+struct IsResourceIDType<ShaderProgramID>
+{
+    constexpr static bool value = true;
+};
+
+class Shader;
+template <>
+struct ResourceTypeToID<Shader>
+{
+    using IDType = ShaderProgramID;
+};
+
+class Program;
+template <>
+struct ResourceTypeToID<Program>
+{
+    using IDType = ShaderProgramID;
+};
+
+template <typename T>
+struct ResourceTypeToID
+{
+    using IDType = void;
+};
+
+template <typename T>
+struct IsResourceIDType
+{
+    static constexpr bool value = false;
+};
+
+template <typename T>
+bool ValueEquals(T lhs, T rhs)
+{
+    return lhs.value == rhs.value;
+}
+
+// Util funcs for resourceIDs
+template <typename T>
+typename std::enable_if<IsResourceIDType<T>::value, bool>::type operator==(const T &lhs,
+                                                                           const T &rhs)
+{
+    return lhs.value == rhs.value;
+}
+
+template <typename T>
+typename std::enable_if<IsResourceIDType<T>::value, bool>::type operator!=(const T &lhs,
+                                                                           const T &rhs)
+{
+    return lhs.value != rhs.value;
+}
+
+template <typename T>
+typename std::enable_if<IsResourceIDType<T>::value, bool>::type operator<(const T &lhs,
+                                                                          const T &rhs)
+{
+    return lhs.value < rhs.value;
+}
+
+// Used to unbox typed values.
+template <typename ResourceIDType>
+GLuint GetIDValue(ResourceIDType id);
+
+template <>
+inline GLuint GetIDValue(GLuint id)
+{
+    return id;
+}
+
+template <typename ResourceIDType>
+inline GLuint GetIDValue(ResourceIDType id)
+{
+    return id.value;
+}
+
+// First case: handling packed enums.
+template <typename EnumT, typename FromT>
+typename std::enable_if<std::is_enum<EnumT>::value, EnumT>::type PackParam(FromT from)
+{
+    return FromGLenum<EnumT>(from);
+}
+
+// Second case: handling non-pointer resource ids.
+template <typename EnumT, typename FromT>
+typename std::enable_if<!std::is_pointer<FromT>::value && !std::is_enum<EnumT>::value, EnumT>::type
+PackParam(FromT from)
+{
+    return {from};
+}
+
+// Third case: handling pointer resource ids.
+template <typename EnumT, typename FromT>
+typename std::enable_if<std::is_pointer<FromT>::value && !std::is_enum<EnumT>::value, EnumT>::type
+PackParam(FromT from)
+{
+    static_assert(sizeof(typename std::remove_pointer<EnumT>::type) ==
+                      sizeof(typename std::remove_pointer<FromT>::type),
+                  "Types have different sizes");
+    static_assert(
+        std::is_same<
+            decltype(std::remove_pointer<EnumT>::type::value),
+            typename std::remove_const<typename std::remove_pointer<FromT>::type>::type>::value,
+        "Data types are different");
+    return reinterpret_cast<EnumT>(from);
+}
+
+struct UniformLocation
+{
+    int value;
+};
+
+bool operator<(const UniformLocation &lhs, const UniformLocation &rhs);
+
+struct UniformBlockIndex
+{
+    uint32_t value;
+};
+
+bool IsEmulatedCompressedFormat(GLenum format);
+}  // namespace gl
+
+namespace egl
+{
+MessageType ErrorCodeToMessageType(EGLint errorCode);
+}  // namespace egl
+
+namespace egl_gl
+{
+gl::TextureTarget EGLCubeMapTargetToCubeMapTarget(EGLenum eglTarget);
+gl::TextureTarget EGLImageTargetToTextureTarget(EGLenum eglTarget);
+gl::TextureType EGLTextureTargetToTextureType(EGLenum eglTarget);
+}  // namespace egl_gl
+
+#endif  // COMMON_PACKEDGLENUMS_H_
diff --git a/gfx/angle/checkout/src/common/PackedGLEnums_autogen.cpp b/gfx/angle/checkout/src/common/PackedGLEnums_autogen.cpp
new file mode 100644
index 0000000000..d025b11a14
--- /dev/null
+++ b/gfx/angle/checkout/src/common/PackedGLEnums_autogen.cpp
@@ -0,0 +1,2449 @@
+// GENERATED FILE - DO NOT EDIT.
+// Generated by gen_packed_gl_enums.py using data from packed_gl_enums.json.
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// PackedGLEnums_autogen.cpp:
+//   Implements ANGLE-specific enums classes for GLenums and functions operating
+//   on them.
+
+#include "common/PackedGLEnums_autogen.h"
+#include "common/debug.h"
+
+namespace gl
+{
+
+template <>
+AlphaTestFunc FromGLenum<AlphaTestFunc>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_ALWAYS:
+            return AlphaTestFunc::AlwaysPass;
+        case GL_EQUAL:
+            return AlphaTestFunc::Equal;
+        case GL_GEQUAL:
+            return AlphaTestFunc::Gequal;
+        case GL_GREATER:
+            return AlphaTestFunc::Greater;
+        case GL_LEQUAL:
+            return AlphaTestFunc::Lequal;
+        case GL_LESS:
+            return AlphaTestFunc::Less;
+        case GL_NEVER:
+            return AlphaTestFunc::Never;
+        case GL_NOTEQUAL:
+            return AlphaTestFunc::NotEqual;
+        default:
+            return AlphaTestFunc::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(AlphaTestFunc from)
+{
+    switch (from)
+    {
+        case AlphaTestFunc::AlwaysPass:
+            return GL_ALWAYS;
+        case AlphaTestFunc::Equal:
+            return GL_EQUAL;
+        case AlphaTestFunc::Gequal:
+            return GL_GEQUAL;
+        case AlphaTestFunc::Greater:
+            return GL_GREATER;
+        case AlphaTestFunc::Lequal:
+            return GL_LEQUAL;
+        case AlphaTestFunc::Less:
+            return GL_LESS;
+        case AlphaTestFunc::Never:
+            return GL_NEVER;
+        case AlphaTestFunc::NotEqual:
+            return GL_NOTEQUAL;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, AlphaTestFunc value)
+{
+    switch (value)
+    {
+        case AlphaTestFunc::AlwaysPass:
+            os << "GL_ALWAYS";
+            break;
+        case AlphaTestFunc::Equal:
+            os << "GL_EQUAL";
+            break;
+        case AlphaTestFunc::Gequal:
+            os << "GL_GEQUAL";
+            break;
+        case AlphaTestFunc::Greater:
+            os << "GL_GREATER";
+            break;
+        case AlphaTestFunc::Lequal:
+            os << "GL_LEQUAL";
+            break;
+        case AlphaTestFunc::Less:
+            os << "GL_LESS";
+            break;
+        case AlphaTestFunc::Never:
+            os << "GL_NEVER";
+            break;
+        case AlphaTestFunc::NotEqual:
+            os << "GL_NOTEQUAL";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+BufferBinding FromGLenum<BufferBinding>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_ARRAY_BUFFER:
+            return BufferBinding::Array;
+        case GL_ATOMIC_COUNTER_BUFFER:
+            return BufferBinding::AtomicCounter;
+        case GL_COPY_READ_BUFFER:
+            return BufferBinding::CopyRead;
+        case GL_COPY_WRITE_BUFFER:
+            return BufferBinding::CopyWrite;
+        case GL_DISPATCH_INDIRECT_BUFFER:
+            return BufferBinding::DispatchIndirect;
+        case GL_DRAW_INDIRECT_BUFFER:
+            return BufferBinding::DrawIndirect;
+        case GL_ELEMENT_ARRAY_BUFFER:
+            return BufferBinding::ElementArray;
+        case GL_PIXEL_PACK_BUFFER:
+            return BufferBinding::PixelPack;
+        case GL_PIXEL_UNPACK_BUFFER:
+            return BufferBinding::PixelUnpack;
+        case GL_SHADER_STORAGE_BUFFER:
+            return BufferBinding::ShaderStorage;
+        case GL_TEXTURE_BUFFER:
+            return BufferBinding::Texture;
+        case GL_TRANSFORM_FEEDBACK_BUFFER:
+            return BufferBinding::TransformFeedback;
+        case GL_UNIFORM_BUFFER:
+            return BufferBinding::Uniform;
+        default:
+            return BufferBinding::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(BufferBinding from)
+{
+    switch (from)
+    {
+        case BufferBinding::Array:
+            return GL_ARRAY_BUFFER;
+        case BufferBinding::AtomicCounter:
+            return GL_ATOMIC_COUNTER_BUFFER;
+        case BufferBinding::CopyRead:
+            return GL_COPY_READ_BUFFER;
+        case BufferBinding::CopyWrite:
+            return GL_COPY_WRITE_BUFFER;
+        case BufferBinding::DispatchIndirect:
+            return GL_DISPATCH_INDIRECT_BUFFER;
+        case BufferBinding::DrawIndirect:
+            return GL_DRAW_INDIRECT_BUFFER;
+        case BufferBinding::ElementArray:
+            return GL_ELEMENT_ARRAY_BUFFER;
+        case BufferBinding::PixelPack:
+            return GL_PIXEL_PACK_BUFFER;
+        case BufferBinding::PixelUnpack:
+            return GL_PIXEL_UNPACK_BUFFER;
+        case BufferBinding::ShaderStorage:
+            return GL_SHADER_STORAGE_BUFFER;
+        case BufferBinding::Texture:
+            return GL_TEXTURE_BUFFER;
+        case BufferBinding::TransformFeedback:
+            return GL_TRANSFORM_FEEDBACK_BUFFER;
+        case BufferBinding::Uniform:
+            return GL_UNIFORM_BUFFER;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, BufferBinding value)
+{
+    switch (value)
+    {
+        case BufferBinding::Array:
+            os << "GL_ARRAY_BUFFER";
+            break;
+        case BufferBinding::AtomicCounter:
+            os << "GL_ATOMIC_COUNTER_BUFFER";
+            break;
+        case BufferBinding::CopyRead:
+            os << "GL_COPY_READ_BUFFER";
+            break;
+        case BufferBinding::CopyWrite:
+            os << "GL_COPY_WRITE_BUFFER";
+            break;
+        case BufferBinding::DispatchIndirect:
+            os << "GL_DISPATCH_INDIRECT_BUFFER";
+            break;
+        case BufferBinding::DrawIndirect:
+            os << "GL_DRAW_INDIRECT_BUFFER";
+            break;
+        case BufferBinding::ElementArray:
+            os << "GL_ELEMENT_ARRAY_BUFFER";
+            break;
+        case BufferBinding::PixelPack:
+            os << "GL_PIXEL_PACK_BUFFER";
+            break;
+        case BufferBinding::PixelUnpack:
+            os << "GL_PIXEL_UNPACK_BUFFER";
+            break;
+        case BufferBinding::ShaderStorage:
+            os << "GL_SHADER_STORAGE_BUFFER";
+            break;
+        case BufferBinding::Texture:
+            os << "GL_TEXTURE_BUFFER";
+            break;
+        case BufferBinding::TransformFeedback:
+            os << "GL_TRANSFORM_FEEDBACK_BUFFER";
+            break;
+        case BufferBinding::Uniform:
+            os << "GL_UNIFORM_BUFFER";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+BufferUsage FromGLenum<BufferUsage>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_DYNAMIC_COPY:
+            return BufferUsage::DynamicCopy;
+        case GL_DYNAMIC_DRAW:
+            return BufferUsage::DynamicDraw;
+        case GL_DYNAMIC_READ:
+            return BufferUsage::DynamicRead;
+        case GL_STATIC_COPY:
+            return BufferUsage::StaticCopy;
+        case GL_STATIC_DRAW:
+            return BufferUsage::StaticDraw;
+        case GL_STATIC_READ:
+            return BufferUsage::StaticRead;
+        case GL_STREAM_COPY:
+            return BufferUsage::StreamCopy;
+        case GL_STREAM_DRAW:
+            return BufferUsage::StreamDraw;
+        case GL_STREAM_READ:
+            return BufferUsage::StreamRead;
+        default:
+            return BufferUsage::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(BufferUsage from)
+{
+    switch (from)
+    {
+        case BufferUsage::DynamicCopy:
+            return GL_DYNAMIC_COPY;
+        case BufferUsage::DynamicDraw:
+            return GL_DYNAMIC_DRAW;
+        case BufferUsage::DynamicRead:
+            return GL_DYNAMIC_READ;
+        case BufferUsage::StaticCopy:
+            return GL_STATIC_COPY;
+        case BufferUsage::StaticDraw:
+            return GL_STATIC_DRAW;
+        case BufferUsage::StaticRead:
+            return GL_STATIC_READ;
+        case BufferUsage::StreamCopy:
+            return GL_STREAM_COPY;
+        case BufferUsage::StreamDraw:
+            return GL_STREAM_DRAW;
+        case BufferUsage::StreamRead:
+            return GL_STREAM_READ;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, BufferUsage value)
+{
+    switch (value)
+    {
+        case BufferUsage::DynamicCopy:
+            os << "GL_DYNAMIC_COPY";
+            break;
+        case BufferUsage::DynamicDraw:
+            os << "GL_DYNAMIC_DRAW";
+            break;
+        case BufferUsage::DynamicRead:
+            os << "GL_DYNAMIC_READ";
+            break;
+        case BufferUsage::StaticCopy:
+            os << "GL_STATIC_COPY";
+            break;
+        case BufferUsage::StaticDraw:
+            os << "GL_STATIC_DRAW";
+            break;
+        case BufferUsage::StaticRead:
+            os << "GL_STATIC_READ";
+            break;
+        case BufferUsage::StreamCopy:
+            os << "GL_STREAM_COPY";
+            break;
+        case BufferUsage::StreamDraw:
+            os << "GL_STREAM_DRAW";
+            break;
+        case BufferUsage::StreamRead:
+            os << "GL_STREAM_READ";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+ClientVertexArrayType FromGLenum<ClientVertexArrayType>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_COLOR_ARRAY:
+            return ClientVertexArrayType::Color;
+        case GL_NORMAL_ARRAY:
+            return ClientVertexArrayType::Normal;
+        case GL_POINT_SIZE_ARRAY_OES:
+            return ClientVertexArrayType::PointSize;
+        case GL_TEXTURE_COORD_ARRAY:
+            return ClientVertexArrayType::TextureCoord;
+        case GL_VERTEX_ARRAY:
+            return ClientVertexArrayType::Vertex;
+        default:
+            return ClientVertexArrayType::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(ClientVertexArrayType from)
+{
+    switch (from)
+    {
+        case ClientVertexArrayType::Color:
+            return GL_COLOR_ARRAY;
+        case ClientVertexArrayType::Normal:
+            return GL_NORMAL_ARRAY;
+        case ClientVertexArrayType::PointSize:
+            return GL_POINT_SIZE_ARRAY_OES;
+        case ClientVertexArrayType::TextureCoord:
+            return GL_TEXTURE_COORD_ARRAY;
+        case ClientVertexArrayType::Vertex:
+            return GL_VERTEX_ARRAY;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ClientVertexArrayType value)
+{
+    switch (value)
+    {
+        case ClientVertexArrayType::Color:
+            os << "GL_COLOR_ARRAY";
+            break;
+        case ClientVertexArrayType::Normal:
+            os << "GL_NORMAL_ARRAY";
+            break;
+        case ClientVertexArrayType::PointSize:
+            os << "GL_POINT_SIZE_ARRAY_OES";
+            break;
+        case ClientVertexArrayType::TextureCoord:
+            os << "GL_TEXTURE_COORD_ARRAY";
+            break;
+        case ClientVertexArrayType::Vertex:
+            os << "GL_VERTEX_ARRAY";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+CullFaceMode FromGLenum<CullFaceMode>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_BACK:
+            return CullFaceMode::Back;
+        case GL_FRONT:
+            return CullFaceMode::Front;
+        case GL_FRONT_AND_BACK:
+            return CullFaceMode::FrontAndBack;
+        default:
+            return CullFaceMode::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(CullFaceMode from)
+{
+    switch (from)
+    {
+        case CullFaceMode::Back:
+            return GL_BACK;
+        case CullFaceMode::Front:
+            return GL_FRONT;
+        case CullFaceMode::FrontAndBack:
+            return GL_FRONT_AND_BACK;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, CullFaceMode value)
+{
+    switch (value)
+    {
+        case CullFaceMode::Back:
+            os << "GL_BACK";
+            break;
+        case CullFaceMode::Front:
+            os << "GL_FRONT";
+            break;
+        case CullFaceMode::FrontAndBack:
+            os << "GL_FRONT_AND_BACK";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+FilterMode FromGLenum<FilterMode>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_NEAREST:
+            return FilterMode::Nearest;
+        case GL_LINEAR:
+            return FilterMode::Linear;
+        case GL_NEAREST_MIPMAP_NEAREST:
+            return FilterMode::NearestMipmapNearest;
+        case GL_NEAREST_MIPMAP_LINEAR:
+            return FilterMode::NearestMipmapLinear;
+        case GL_LINEAR_MIPMAP_LINEAR:
+            return FilterMode::LinearMipmapLinear;
+        default:
+            return FilterMode::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(FilterMode from)
+{
+    switch (from)
+    {
+        case FilterMode::Nearest:
+            return GL_NEAREST;
+        case FilterMode::Linear:
+            return GL_LINEAR;
+        case FilterMode::NearestMipmapNearest:
+            return GL_NEAREST_MIPMAP_NEAREST;
+        case FilterMode::NearestMipmapLinear:
+            return GL_NEAREST_MIPMAP_LINEAR;
+        case FilterMode::LinearMipmapLinear:
+            return GL_LINEAR_MIPMAP_LINEAR;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, FilterMode value)
+{
+    switch (value)
+    {
+        case FilterMode::Nearest:
+            os << "GL_NEAREST";
+            break;
+        case FilterMode::Linear:
+            os << "GL_LINEAR";
+            break;
+        case FilterMode::NearestMipmapNearest:
+            os << "GL_NEAREST_MIPMAP_NEAREST";
+            break;
+        case FilterMode::NearestMipmapLinear:
+            os << "GL_NEAREST_MIPMAP_LINEAR";
+            break;
+        case FilterMode::LinearMipmapLinear:
+            os << "GL_LINEAR_MIPMAP_LINEAR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+FogMode FromGLenum<FogMode>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_EXP:
+            return FogMode::Exp;
+        case GL_EXP2:
+            return FogMode::Exp2;
+        case GL_LINEAR:
+            return FogMode::Linear;
+        default:
+            return FogMode::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(FogMode from)
+{
+    switch (from)
+    {
+        case FogMode::Exp:
+            return GL_EXP;
+        case FogMode::Exp2:
+            return GL_EXP2;
+        case FogMode::Linear:
+            return GL_LINEAR;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, FogMode value)
+{
+    switch (value)
+    {
+        case FogMode::Exp:
+            os << "GL_EXP";
+            break;
+        case FogMode::Exp2:
+            os << "GL_EXP2";
+            break;
+        case FogMode::Linear:
+            os << "GL_LINEAR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+GraphicsResetStatus FromGLenum<GraphicsResetStatus>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_NO_ERROR:
+            return GraphicsResetStatus::NoError;
+        case GL_GUILTY_CONTEXT_RESET:
+            return GraphicsResetStatus::GuiltyContextReset;
+        case GL_INNOCENT_CONTEXT_RESET:
+            return GraphicsResetStatus::InnocentContextReset;
+        case GL_UNKNOWN_CONTEXT_RESET:
+            return GraphicsResetStatus::UnknownContextReset;
+        case GL_PURGED_CONTEXT_RESET_NV:
+            return GraphicsResetStatus::PurgedContextResetNV;
+        default:
+            return GraphicsResetStatus::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(GraphicsResetStatus from)
+{
+    switch (from)
+    {
+        case GraphicsResetStatus::NoError:
+            return GL_NO_ERROR;
+        case GraphicsResetStatus::GuiltyContextReset:
+            return GL_GUILTY_CONTEXT_RESET;
+        case GraphicsResetStatus::InnocentContextReset:
+            return GL_INNOCENT_CONTEXT_RESET;
+        case GraphicsResetStatus::UnknownContextReset:
+            return GL_UNKNOWN_CONTEXT_RESET;
+        case GraphicsResetStatus::PurgedContextResetNV:
+            return GL_PURGED_CONTEXT_RESET_NV;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, GraphicsResetStatus value)
+{
+    switch (value)
+    {
+        case GraphicsResetStatus::NoError:
+            os << "GL_NO_ERROR";
+            break;
+        case GraphicsResetStatus::GuiltyContextReset:
+            os << "GL_GUILTY_CONTEXT_RESET";
+            break;
+        case GraphicsResetStatus::InnocentContextReset:
+            os << "GL_INNOCENT_CONTEXT_RESET";
+            break;
+        case GraphicsResetStatus::UnknownContextReset:
+            os << "GL_UNKNOWN_CONTEXT_RESET";
+            break;
+        case GraphicsResetStatus::PurgedContextResetNV:
+            os << "GL_PURGED_CONTEXT_RESET_NV";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+HandleType FromGLenum<HandleType>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_HANDLE_TYPE_OPAQUE_FD_EXT:
+            return HandleType::OpaqueFd;
+        case GL_HANDLE_TYPE_ZIRCON_VMO_ANGLE:
+            return HandleType::ZirconVmo;
+        case GL_HANDLE_TYPE_ZIRCON_EVENT_ANGLE:
+            return HandleType::ZirconEvent;
+        default:
+            return HandleType::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(HandleType from)
+{
+    switch (from)
+    {
+        case HandleType::OpaqueFd:
+            return GL_HANDLE_TYPE_OPAQUE_FD_EXT;
+        case HandleType::ZirconVmo:
+            return GL_HANDLE_TYPE_ZIRCON_VMO_ANGLE;
+        case HandleType::ZirconEvent:
+            return GL_HANDLE_TYPE_ZIRCON_EVENT_ANGLE;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, HandleType value)
+{
+    switch (value)
+    {
+        case HandleType::OpaqueFd:
+            os << "GL_HANDLE_TYPE_OPAQUE_FD_EXT";
+            break;
+        case HandleType::ZirconVmo:
+            os << "GL_HANDLE_TYPE_ZIRCON_VMO_ANGLE";
+            break;
+        case HandleType::ZirconEvent:
+            os << "GL_HANDLE_TYPE_ZIRCON_EVENT_ANGLE";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+HintSetting FromGLenum<HintSetting>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_DONT_CARE:
+            return HintSetting::DontCare;
+        case GL_FASTEST:
+            return HintSetting::Fastest;
+        case GL_NICEST:
+            return HintSetting::Nicest;
+        default:
+            return HintSetting::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(HintSetting from)
+{
+    switch (from)
+    {
+        case HintSetting::DontCare:
+            return GL_DONT_CARE;
+        case HintSetting::Fastest:
+            return GL_FASTEST;
+        case HintSetting::Nicest:
+            return GL_NICEST;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, HintSetting value)
+{
+    switch (value)
+    {
+        case HintSetting::DontCare:
+            os << "GL_DONT_CARE";
+            break;
+        case HintSetting::Fastest:
+            os << "GL_FASTEST";
+            break;
+        case HintSetting::Nicest:
+            os << "GL_NICEST";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+ImageLayout FromGLenum<ImageLayout>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_NONE:
+            return ImageLayout::Undefined;
+        case GL_LAYOUT_GENERAL_EXT:
+            return ImageLayout::General;
+        case GL_LAYOUT_COLOR_ATTACHMENT_EXT:
+            return ImageLayout::ColorAttachment;
+        case GL_LAYOUT_DEPTH_STENCIL_ATTACHMENT_EXT:
+            return ImageLayout::DepthStencilAttachment;
+        case GL_LAYOUT_DEPTH_STENCIL_READ_ONLY_EXT:
+            return ImageLayout::DepthStencilReadOnlyAttachment;
+        case GL_LAYOUT_SHADER_READ_ONLY_EXT:
+            return ImageLayout::ShaderReadOnly;
+        case GL_LAYOUT_TRANSFER_SRC_EXT:
+            return ImageLayout::TransferSrc;
+        case GL_LAYOUT_TRANSFER_DST_EXT:
+            return ImageLayout::TransferDst;
+        case GL_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_EXT:
+            return ImageLayout::DepthReadOnlyStencilAttachment;
+        case GL_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_EXT:
+            return ImageLayout::DepthAttachmentStencilReadOnly;
+        default:
+            return ImageLayout::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(ImageLayout from)
+{
+    switch (from)
+    {
+        case ImageLayout::Undefined:
+            return GL_NONE;
+        case ImageLayout::General:
+            return GL_LAYOUT_GENERAL_EXT;
+        case ImageLayout::ColorAttachment:
+            return GL_LAYOUT_COLOR_ATTACHMENT_EXT;
+        case ImageLayout::DepthStencilAttachment:
+            return GL_LAYOUT_DEPTH_STENCIL_ATTACHMENT_EXT;
+        case ImageLayout::DepthStencilReadOnlyAttachment:
+            return GL_LAYOUT_DEPTH_STENCIL_READ_ONLY_EXT;
+        case ImageLayout::ShaderReadOnly:
+            return GL_LAYOUT_SHADER_READ_ONLY_EXT;
+        case ImageLayout::TransferSrc:
+            return GL_LAYOUT_TRANSFER_SRC_EXT;
+        case ImageLayout::TransferDst:
+            return GL_LAYOUT_TRANSFER_DST_EXT;
+        case ImageLayout::DepthReadOnlyStencilAttachment:
+            return GL_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_EXT;
+        case ImageLayout::DepthAttachmentStencilReadOnly:
+            return GL_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_EXT;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ImageLayout value)
+{
+    switch (value)
+    {
+        case ImageLayout::Undefined:
+            os << "GL_NONE";
+            break;
+        case ImageLayout::General:
+            os << "GL_LAYOUT_GENERAL_EXT";
+            break;
+        case ImageLayout::ColorAttachment:
+            os << "GL_LAYOUT_COLOR_ATTACHMENT_EXT";
+            break;
+        case ImageLayout::DepthStencilAttachment:
+            os << "GL_LAYOUT_DEPTH_STENCIL_ATTACHMENT_EXT";
+            break;
+        case ImageLayout::DepthStencilReadOnlyAttachment:
+            os << "GL_LAYOUT_DEPTH_STENCIL_READ_ONLY_EXT";
+            break;
+        case ImageLayout::ShaderReadOnly:
+            os << "GL_LAYOUT_SHADER_READ_ONLY_EXT";
+            break;
+        case ImageLayout::TransferSrc:
+            os << "GL_LAYOUT_TRANSFER_SRC_EXT";
+            break;
+        case ImageLayout::TransferDst:
+            os << "GL_LAYOUT_TRANSFER_DST_EXT";
+            break;
+        case ImageLayout::DepthReadOnlyStencilAttachment:
+            os << "GL_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_EXT";
+            break;
+        case ImageLayout::DepthAttachmentStencilReadOnly:
+            os << "GL_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_EXT";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+LightParameter FromGLenum<LightParameter>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_AMBIENT:
+            return LightParameter::Ambient;
+        case GL_AMBIENT_AND_DIFFUSE:
+            return LightParameter::AmbientAndDiffuse;
+        case GL_CONSTANT_ATTENUATION:
+            return LightParameter::ConstantAttenuation;
+        case GL_DIFFUSE:
+            return LightParameter::Diffuse;
+        case GL_LINEAR_ATTENUATION:
+            return LightParameter::LinearAttenuation;
+        case GL_POSITION:
+            return LightParameter::Position;
+        case GL_QUADRATIC_ATTENUATION:
+            return LightParameter::QuadraticAttenuation;
+        case GL_SPECULAR:
+            return LightParameter::Specular;
+        case GL_SPOT_CUTOFF:
+            return LightParameter::SpotCutoff;
+        case GL_SPOT_DIRECTION:
+            return LightParameter::SpotDirection;
+        case GL_SPOT_EXPONENT:
+            return LightParameter::SpotExponent;
+        default:
+            return LightParameter::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(LightParameter from)
+{
+    switch (from)
+    {
+        case LightParameter::Ambient:
+            return GL_AMBIENT;
+        case LightParameter::AmbientAndDiffuse:
+            return GL_AMBIENT_AND_DIFFUSE;
+        case LightParameter::ConstantAttenuation:
+            return GL_CONSTANT_ATTENUATION;
+        case LightParameter::Diffuse:
+            return GL_DIFFUSE;
+        case LightParameter::LinearAttenuation:
+            return GL_LINEAR_ATTENUATION;
+        case LightParameter::Position:
+            return GL_POSITION;
+        case LightParameter::QuadraticAttenuation:
+            return GL_QUADRATIC_ATTENUATION;
+        case LightParameter::Specular:
+            return GL_SPECULAR;
+        case LightParameter::SpotCutoff:
+            return GL_SPOT_CUTOFF;
+        case LightParameter::SpotDirection:
+            return GL_SPOT_DIRECTION;
+        case LightParameter::SpotExponent:
+            return GL_SPOT_EXPONENT;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, LightParameter value)
+{
+    switch (value)
+    {
+        case LightParameter::Ambient:
+            os << "GL_AMBIENT";
+            break;
+        case LightParameter::AmbientAndDiffuse:
+            os << "GL_AMBIENT_AND_DIFFUSE";
+            break;
+        case LightParameter::ConstantAttenuation:
+            os << "GL_CONSTANT_ATTENUATION";
+            break;
+        case LightParameter::Diffuse:
+            os << "GL_DIFFUSE";
+            break;
+        case LightParameter::LinearAttenuation:
+            os << "GL_LINEAR_ATTENUATION";
+            break;
+        case LightParameter::Position:
+            os << "GL_POSITION";
+            break;
+        case LightParameter::QuadraticAttenuation:
+            os << "GL_QUADRATIC_ATTENUATION";
+            break;
+        case LightParameter::Specular:
+            os << "GL_SPECULAR";
+            break;
+        case LightParameter::SpotCutoff:
+            os << "GL_SPOT_CUTOFF";
+            break;
+        case LightParameter::SpotDirection:
+            os << "GL_SPOT_DIRECTION";
+            break;
+        case LightParameter::SpotExponent:
+            os << "GL_SPOT_EXPONENT";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+LogicalOperation FromGLenum<LogicalOperation>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_AND:
+            return LogicalOperation::And;
+        case GL_AND_INVERTED:
+            return LogicalOperation::AndInverted;
+        case GL_AND_REVERSE:
+            return LogicalOperation::AndReverse;
+        case GL_CLEAR:
+            return LogicalOperation::Clear;
+        case GL_COPY:
+            return LogicalOperation::Copy;
+        case GL_COPY_INVERTED:
+            return LogicalOperation::CopyInverted;
+        case GL_EQUIV:
+            return LogicalOperation::Equiv;
+        case GL_INVERT:
+            return LogicalOperation::Invert;
+        case GL_NAND:
+            return LogicalOperation::Nand;
+        case GL_NOOP:
+            return LogicalOperation::Noop;
+        case GL_NOR:
+            return LogicalOperation::Nor;
+        case GL_OR:
+            return LogicalOperation::Or;
+        case GL_OR_INVERTED:
+            return LogicalOperation::OrInverted;
+        case GL_OR_REVERSE:
+            return LogicalOperation::OrReverse;
+        case GL_SET:
+            return LogicalOperation::Set;
+        case GL_XOR:
+            return LogicalOperation::Xor;
+        default:
+            return LogicalOperation::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(LogicalOperation from)
+{
+    switch (from)
+    {
+        case LogicalOperation::And:
+            return GL_AND;
+        case LogicalOperation::AndInverted:
+            return GL_AND_INVERTED;
+        case LogicalOperation::AndReverse:
+            return GL_AND_REVERSE;
+        case LogicalOperation::Clear:
+            return GL_CLEAR;
+        case LogicalOperation::Copy:
+            return GL_COPY;
+        case LogicalOperation::CopyInverted:
+            return GL_COPY_INVERTED;
+        case LogicalOperation::Equiv:
+            return GL_EQUIV;
+        case LogicalOperation::Invert:
+            return GL_INVERT;
+        case LogicalOperation::Nand:
+            return GL_NAND;
+        case LogicalOperation::Noop:
+            return GL_NOOP;
+        case LogicalOperation::Nor:
+            return GL_NOR;
+        case LogicalOperation::Or:
+            return GL_OR;
+        case LogicalOperation::OrInverted:
+            return GL_OR_INVERTED;
+        case LogicalOperation::OrReverse:
+            return GL_OR_REVERSE;
+        case LogicalOperation::Set:
+            return GL_SET;
+        case LogicalOperation::Xor:
+            return GL_XOR;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, LogicalOperation value)
+{
+    switch (value)
+    {
+        case LogicalOperation::And:
+            os << "GL_AND";
+            break;
+        case LogicalOperation::AndInverted:
+            os << "GL_AND_INVERTED";
+            break;
+        case LogicalOperation::AndReverse:
+            os << "GL_AND_REVERSE";
+            break;
+        case LogicalOperation::Clear:
+            os << "GL_CLEAR";
+            break;
+        case LogicalOperation::Copy:
+            os << "GL_COPY";
+            break;
+        case LogicalOperation::CopyInverted:
+            os << "GL_COPY_INVERTED";
+            break;
+        case LogicalOperation::Equiv:
+            os << "GL_EQUIV";
+            break;
+        case LogicalOperation::Invert:
+            os << "GL_INVERT";
+            break;
+        case LogicalOperation::Nand:
+            os << "GL_NAND";
+            break;
+        case LogicalOperation::Noop:
+            os << "GL_NOOP";
+            break;
+        case LogicalOperation::Nor:
+            os << "GL_NOR";
+            break;
+        case LogicalOperation::Or:
+            os << "GL_OR";
+            break;
+        case LogicalOperation::OrInverted:
+            os << "GL_OR_INVERTED";
+            break;
+        case LogicalOperation::OrReverse:
+            os << "GL_OR_REVERSE";
+            break;
+        case LogicalOperation::Set:
+            os << "GL_SET";
+            break;
+        case LogicalOperation::Xor:
+            os << "GL_XOR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+MaterialParameter FromGLenum<MaterialParameter>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_AMBIENT:
+            return MaterialParameter::Ambient;
+        case GL_AMBIENT_AND_DIFFUSE:
+            return MaterialParameter::AmbientAndDiffuse;
+        case GL_DIFFUSE:
+            return MaterialParameter::Diffuse;
+        case GL_EMISSION:
+            return MaterialParameter::Emission;
+        case GL_SHININESS:
+            return MaterialParameter::Shininess;
+        case GL_SPECULAR:
+            return MaterialParameter::Specular;
+        default:
+            return MaterialParameter::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(MaterialParameter from)
+{
+    switch (from)
+    {
+        case MaterialParameter::Ambient:
+            return GL_AMBIENT;
+        case MaterialParameter::AmbientAndDiffuse:
+            return GL_AMBIENT_AND_DIFFUSE;
+        case MaterialParameter::Diffuse:
+            return GL_DIFFUSE;
+        case MaterialParameter::Emission:
+            return GL_EMISSION;
+        case MaterialParameter::Shininess:
+            return GL_SHININESS;
+        case MaterialParameter::Specular:
+            return GL_SPECULAR;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, MaterialParameter value)
+{
+    switch (value)
+    {
+        case MaterialParameter::Ambient:
+            os << "GL_AMBIENT";
+            break;
+        case MaterialParameter::AmbientAndDiffuse:
+            os << "GL_AMBIENT_AND_DIFFUSE";
+            break;
+        case MaterialParameter::Diffuse:
+            os << "GL_DIFFUSE";
+            break;
+        case MaterialParameter::Emission:
+            os << "GL_EMISSION";
+            break;
+        case MaterialParameter::Shininess:
+            os << "GL_SHININESS";
+            break;
+        case MaterialParameter::Specular:
+            os << "GL_SPECULAR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+MatrixType FromGLenum<MatrixType>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_MODELVIEW:
+            return MatrixType::Modelview;
+        case GL_PROJECTION:
+            return MatrixType::Projection;
+        case GL_TEXTURE:
+            return MatrixType::Texture;
+        default:
+            return MatrixType::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(MatrixType from)
+{
+    switch (from)
+    {
+        case MatrixType::Modelview:
+            return GL_MODELVIEW;
+        case MatrixType::Projection:
+            return GL_PROJECTION;
+        case MatrixType::Texture:
+            return GL_TEXTURE;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, MatrixType value)
+{
+    switch (value)
+    {
+        case MatrixType::Modelview:
+            os << "GL_MODELVIEW";
+            break;
+        case MatrixType::Projection:
+            os << "GL_PROJECTION";
+            break;
+        case MatrixType::Texture:
+            os << "GL_TEXTURE";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+PointParameter FromGLenum<PointParameter>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_POINT_SIZE_MIN:
+            return PointParameter::PointSizeMin;
+        case GL_POINT_SIZE_MAX:
+            return PointParameter::PointSizeMax;
+        case GL_POINT_FADE_THRESHOLD_SIZE:
+            return PointParameter::PointFadeThresholdSize;
+        case GL_POINT_DISTANCE_ATTENUATION:
+            return PointParameter::PointDistanceAttenuation;
+        default:
+            return PointParameter::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(PointParameter from)
+{
+    switch (from)
+    {
+        case PointParameter::PointSizeMin:
+            return GL_POINT_SIZE_MIN;
+        case PointParameter::PointSizeMax:
+            return GL_POINT_SIZE_MAX;
+        case PointParameter::PointFadeThresholdSize:
+            return GL_POINT_FADE_THRESHOLD_SIZE;
+        case PointParameter::PointDistanceAttenuation:
+            return GL_POINT_DISTANCE_ATTENUATION;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, PointParameter value)
+{
+    switch (value)
+    {
+        case PointParameter::PointSizeMin:
+            os << "GL_POINT_SIZE_MIN";
+            break;
+        case PointParameter::PointSizeMax:
+            os << "GL_POINT_SIZE_MAX";
+            break;
+        case PointParameter::PointFadeThresholdSize:
+            os << "GL_POINT_FADE_THRESHOLD_SIZE";
+            break;
+        case PointParameter::PointDistanceAttenuation:
+            os << "GL_POINT_DISTANCE_ATTENUATION";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+ProvokingVertexConvention FromGLenum<ProvokingVertexConvention>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_FIRST_VERTEX_CONVENTION:
+            return ProvokingVertexConvention::FirstVertexConvention;
+        case GL_LAST_VERTEX_CONVENTION:
+            return ProvokingVertexConvention::LastVertexConvention;
+        default:
+            return ProvokingVertexConvention::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(ProvokingVertexConvention from)
+{
+    switch (from)
+    {
+        case ProvokingVertexConvention::FirstVertexConvention:
+            return GL_FIRST_VERTEX_CONVENTION;
+        case ProvokingVertexConvention::LastVertexConvention:
+            return GL_LAST_VERTEX_CONVENTION;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ProvokingVertexConvention value)
+{
+    switch (value)
+    {
+        case ProvokingVertexConvention::FirstVertexConvention:
+            os << "GL_FIRST_VERTEX_CONVENTION";
+            break;
+        case ProvokingVertexConvention::LastVertexConvention:
+            os << "GL_LAST_VERTEX_CONVENTION";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+QueryType FromGLenum<QueryType>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_ANY_SAMPLES_PASSED:
+            return QueryType::AnySamples;
+        case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
+            return QueryType::AnySamplesConservative;
+        case GL_COMMANDS_COMPLETED_CHROMIUM:
+            return QueryType::CommandsCompleted;
+        case GL_PRIMITIVES_GENERATED_EXT:
+            return QueryType::PrimitivesGenerated;
+        case GL_TIME_ELAPSED_EXT:
+            return QueryType::TimeElapsed;
+        case GL_TIMESTAMP_EXT:
+            return QueryType::Timestamp;
+        case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
+            return QueryType::TransformFeedbackPrimitivesWritten;
+        default:
+            return QueryType::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(QueryType from)
+{
+    switch (from)
+    {
+        case QueryType::AnySamples:
+            return GL_ANY_SAMPLES_PASSED;
+        case QueryType::AnySamplesConservative:
+            return GL_ANY_SAMPLES_PASSED_CONSERVATIVE;
+        case QueryType::CommandsCompleted:
+            return GL_COMMANDS_COMPLETED_CHROMIUM;
+        case QueryType::PrimitivesGenerated:
+            return GL_PRIMITIVES_GENERATED_EXT;
+        case QueryType::TimeElapsed:
+            return GL_TIME_ELAPSED_EXT;
+        case QueryType::Timestamp:
+            return GL_TIMESTAMP_EXT;
+        case QueryType::TransformFeedbackPrimitivesWritten:
+            return GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, QueryType value)
+{
+    switch (value)
+    {
+        case QueryType::AnySamples:
+            os << "GL_ANY_SAMPLES_PASSED";
+            break;
+        case QueryType::AnySamplesConservative:
+            os << "GL_ANY_SAMPLES_PASSED_CONSERVATIVE";
+            break;
+        case QueryType::CommandsCompleted:
+            os << "GL_COMMANDS_COMPLETED_CHROMIUM";
+            break;
+        case QueryType::PrimitivesGenerated:
+            os << "GL_PRIMITIVES_GENERATED_EXT";
+            break;
+        case QueryType::TimeElapsed:
+            os << "GL_TIME_ELAPSED_EXT";
+            break;
+        case QueryType::Timestamp:
+            os << "GL_TIMESTAMP_EXT";
+            break;
+        case QueryType::TransformFeedbackPrimitivesWritten:
+            os << "GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+ShaderType FromGLenum<ShaderType>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_VERTEX_SHADER:
+            return ShaderType::Vertex;
+        case GL_TESS_CONTROL_SHADER_EXT:
+            return ShaderType::TessControl;
+        case GL_TESS_EVALUATION_SHADER_EXT:
+            return ShaderType::TessEvaluation;
+        case GL_GEOMETRY_SHADER_EXT:
+            return ShaderType::Geometry;
+        case GL_FRAGMENT_SHADER:
+            return ShaderType::Fragment;
+        case GL_COMPUTE_SHADER:
+            return ShaderType::Compute;
+        default:
+            return ShaderType::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(ShaderType from)
+{
+    switch (from)
+    {
+        case ShaderType::Vertex:
+            return GL_VERTEX_SHADER;
+        case ShaderType::TessControl:
+            return GL_TESS_CONTROL_SHADER_EXT;
+        case ShaderType::TessEvaluation:
+            return GL_TESS_EVALUATION_SHADER_EXT;
+        case ShaderType::Geometry:
+            return GL_GEOMETRY_SHADER_EXT;
+        case ShaderType::Fragment:
+            return GL_FRAGMENT_SHADER;
+        case ShaderType::Compute:
+            return GL_COMPUTE_SHADER;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ShaderType value)
+{
+    switch (value)
+    {
+        case ShaderType::Vertex:
+            os << "GL_VERTEX_SHADER";
+            break;
+        case ShaderType::TessControl:
+            os << "GL_TESS_CONTROL_SHADER_EXT";
+            break;
+        case ShaderType::TessEvaluation:
+            os << "GL_TESS_EVALUATION_SHADER_EXT";
+            break;
+        case ShaderType::Geometry:
+            os << "GL_GEOMETRY_SHADER_EXT";
+            break;
+        case ShaderType::Fragment:
+            os << "GL_FRAGMENT_SHADER";
+            break;
+        case ShaderType::Compute:
+            os << "GL_COMPUTE_SHADER";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+ShadingModel FromGLenum<ShadingModel>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_FLAT:
+            return ShadingModel::Flat;
+        case GL_SMOOTH:
+            return ShadingModel::Smooth;
+        default:
+            return ShadingModel::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(ShadingModel from)
+{
+    switch (from)
+    {
+        case ShadingModel::Flat:
+            return GL_FLAT;
+        case ShadingModel::Smooth:
+            return GL_SMOOTH;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ShadingModel value)
+{
+    switch (value)
+    {
+        case ShadingModel::Flat:
+            os << "GL_FLAT";
+            break;
+        case ShadingModel::Smooth:
+            os << "GL_SMOOTH";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+ShadingRate FromGLenum<ShadingRate>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_NONE:
+            return ShadingRate::Undefined;
+        case GL_SHADING_RATE_1X1_PIXELS_QCOM:
+            return ShadingRate::_1x1;
+        case GL_SHADING_RATE_1X2_PIXELS_QCOM:
+            return ShadingRate::_1x2;
+        case GL_SHADING_RATE_2X1_PIXELS_QCOM:
+            return ShadingRate::_2x1;
+        case GL_SHADING_RATE_2X2_PIXELS_QCOM:
+            return ShadingRate::_2x2;
+        case GL_SHADING_RATE_4X2_PIXELS_QCOM:
+            return ShadingRate::_4x2;
+        case GL_SHADING_RATE_4X4_PIXELS_QCOM:
+            return ShadingRate::_4x4;
+        default:
+            return ShadingRate::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(ShadingRate from)
+{
+    switch (from)
+    {
+        case ShadingRate::Undefined:
+            return GL_NONE;
+        case ShadingRate::_1x1:
+            return GL_SHADING_RATE_1X1_PIXELS_QCOM;
+        case ShadingRate::_1x2:
+            return GL_SHADING_RATE_1X2_PIXELS_QCOM;
+        case ShadingRate::_2x1:
+            return GL_SHADING_RATE_2X1_PIXELS_QCOM;
+        case ShadingRate::_2x2:
+            return GL_SHADING_RATE_2X2_PIXELS_QCOM;
+        case ShadingRate::_4x2:
+            return GL_SHADING_RATE_4X2_PIXELS_QCOM;
+        case ShadingRate::_4x4:
+            return GL_SHADING_RATE_4X4_PIXELS_QCOM;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, ShadingRate value)
+{
+    switch (value)
+    {
+        case ShadingRate::Undefined:
+            os << "GL_NONE";
+            break;
+        case ShadingRate::_1x1:
+            os << "GL_SHADING_RATE_1X1_PIXELS_QCOM";
+            break;
+        case ShadingRate::_1x2:
+            os << "GL_SHADING_RATE_1X2_PIXELS_QCOM";
+            break;
+        case ShadingRate::_2x1:
+            os << "GL_SHADING_RATE_2X1_PIXELS_QCOM";
+            break;
+        case ShadingRate::_2x2:
+            os << "GL_SHADING_RATE_2X2_PIXELS_QCOM";
+            break;
+        case ShadingRate::_4x2:
+            os << "GL_SHADING_RATE_4X2_PIXELS_QCOM";
+            break;
+        case ShadingRate::_4x4:
+            os << "GL_SHADING_RATE_4X4_PIXELS_QCOM";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureCombine FromGLenum<TextureCombine>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_ADD:
+            return TextureCombine::Add;
+        case GL_ADD_SIGNED:
+            return TextureCombine::AddSigned;
+        case GL_DOT3_RGB:
+            return TextureCombine::Dot3Rgb;
+        case GL_DOT3_RGBA:
+            return TextureCombine::Dot3Rgba;
+        case GL_INTERPOLATE:
+            return TextureCombine::Interpolate;
+        case GL_MODULATE:
+            return TextureCombine::Modulate;
+        case GL_REPLACE:
+            return TextureCombine::Replace;
+        case GL_SUBTRACT:
+            return TextureCombine::Subtract;
+        default:
+            return TextureCombine::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(TextureCombine from)
+{
+    switch (from)
+    {
+        case TextureCombine::Add:
+            return GL_ADD;
+        case TextureCombine::AddSigned:
+            return GL_ADD_SIGNED;
+        case TextureCombine::Dot3Rgb:
+            return GL_DOT3_RGB;
+        case TextureCombine::Dot3Rgba:
+            return GL_DOT3_RGBA;
+        case TextureCombine::Interpolate:
+            return GL_INTERPOLATE;
+        case TextureCombine::Modulate:
+            return GL_MODULATE;
+        case TextureCombine::Replace:
+            return GL_REPLACE;
+        case TextureCombine::Subtract:
+            return GL_SUBTRACT;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureCombine value)
+{
+    switch (value)
+    {
+        case TextureCombine::Add:
+            os << "GL_ADD";
+            break;
+        case TextureCombine::AddSigned:
+            os << "GL_ADD_SIGNED";
+            break;
+        case TextureCombine::Dot3Rgb:
+            os << "GL_DOT3_RGB";
+            break;
+        case TextureCombine::Dot3Rgba:
+            os << "GL_DOT3_RGBA";
+            break;
+        case TextureCombine::Interpolate:
+            os << "GL_INTERPOLATE";
+            break;
+        case TextureCombine::Modulate:
+            os << "GL_MODULATE";
+            break;
+        case TextureCombine::Replace:
+            os << "GL_REPLACE";
+            break;
+        case TextureCombine::Subtract:
+            os << "GL_SUBTRACT";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureEnvMode FromGLenum<TextureEnvMode>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_ADD:
+            return TextureEnvMode::Add;
+        case GL_BLEND:
+            return TextureEnvMode::Blend;
+        case GL_COMBINE:
+            return TextureEnvMode::Combine;
+        case GL_DECAL:
+            return TextureEnvMode::Decal;
+        case GL_MODULATE:
+            return TextureEnvMode::Modulate;
+        case GL_REPLACE:
+            return TextureEnvMode::Replace;
+        default:
+            return TextureEnvMode::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(TextureEnvMode from)
+{
+    switch (from)
+    {
+        case TextureEnvMode::Add:
+            return GL_ADD;
+        case TextureEnvMode::Blend:
+            return GL_BLEND;
+        case TextureEnvMode::Combine:
+            return GL_COMBINE;
+        case TextureEnvMode::Decal:
+            return GL_DECAL;
+        case TextureEnvMode::Modulate:
+            return GL_MODULATE;
+        case TextureEnvMode::Replace:
+            return GL_REPLACE;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureEnvMode value)
+{
+    switch (value)
+    {
+        case TextureEnvMode::Add:
+            os << "GL_ADD";
+            break;
+        case TextureEnvMode::Blend:
+            os << "GL_BLEND";
+            break;
+        case TextureEnvMode::Combine:
+            os << "GL_COMBINE";
+            break;
+        case TextureEnvMode::Decal:
+            os << "GL_DECAL";
+            break;
+        case TextureEnvMode::Modulate:
+            os << "GL_MODULATE";
+            break;
+        case TextureEnvMode::Replace:
+            os << "GL_REPLACE";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureEnvParameter FromGLenum<TextureEnvParameter>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_TEXTURE_ENV_MODE:
+            return TextureEnvParameter::Mode;
+        case GL_TEXTURE_ENV_COLOR:
+            return TextureEnvParameter::Color;
+        case GL_COMBINE_RGB:
+            return TextureEnvParameter::CombineRgb;
+        case GL_COMBINE_ALPHA:
+            return TextureEnvParameter::CombineAlpha;
+        case GL_RGB_SCALE:
+            return TextureEnvParameter::RgbScale;
+        case GL_ALPHA_SCALE:
+            return TextureEnvParameter::AlphaScale;
+        case GL_SRC0_RGB:
+            return TextureEnvParameter::Src0Rgb;
+        case GL_SRC1_RGB:
+            return TextureEnvParameter::Src1Rgb;
+        case GL_SRC2_RGB:
+            return TextureEnvParameter::Src2Rgb;
+        case GL_SRC0_ALPHA:
+            return TextureEnvParameter::Src0Alpha;
+        case GL_SRC1_ALPHA:
+            return TextureEnvParameter::Src1Alpha;
+        case GL_SRC2_ALPHA:
+            return TextureEnvParameter::Src2Alpha;
+        case GL_OPERAND0_RGB:
+            return TextureEnvParameter::Op0Rgb;
+        case GL_OPERAND1_RGB:
+            return TextureEnvParameter::Op1Rgb;
+        case GL_OPERAND2_RGB:
+            return TextureEnvParameter::Op2Rgb;
+        case GL_OPERAND0_ALPHA:
+            return TextureEnvParameter::Op0Alpha;
+        case GL_OPERAND1_ALPHA:
+            return TextureEnvParameter::Op1Alpha;
+        case GL_OPERAND2_ALPHA:
+            return TextureEnvParameter::Op2Alpha;
+        case GL_COORD_REPLACE_OES:
+            return TextureEnvParameter::PointCoordReplace;
+        default:
+            return TextureEnvParameter::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(TextureEnvParameter from)
+{
+    switch (from)
+    {
+        case TextureEnvParameter::Mode:
+            return GL_TEXTURE_ENV_MODE;
+        case TextureEnvParameter::Color:
+            return GL_TEXTURE_ENV_COLOR;
+        case TextureEnvParameter::CombineRgb:
+            return GL_COMBINE_RGB;
+        case TextureEnvParameter::CombineAlpha:
+            return GL_COMBINE_ALPHA;
+        case TextureEnvParameter::RgbScale:
+            return GL_RGB_SCALE;
+        case TextureEnvParameter::AlphaScale:
+            return GL_ALPHA_SCALE;
+        case TextureEnvParameter::Src0Rgb:
+            return GL_SRC0_RGB;
+        case TextureEnvParameter::Src1Rgb:
+            return GL_SRC1_RGB;
+        case TextureEnvParameter::Src2Rgb:
+            return GL_SRC2_RGB;
+        case TextureEnvParameter::Src0Alpha:
+            return GL_SRC0_ALPHA;
+        case TextureEnvParameter::Src1Alpha:
+            return GL_SRC1_ALPHA;
+        case TextureEnvParameter::Src2Alpha:
+            return GL_SRC2_ALPHA;
+        case TextureEnvParameter::Op0Rgb:
+            return GL_OPERAND0_RGB;
+        case TextureEnvParameter::Op1Rgb:
+            return GL_OPERAND1_RGB;
+        case TextureEnvParameter::Op2Rgb:
+            return GL_OPERAND2_RGB;
+        case TextureEnvParameter::Op0Alpha:
+            return GL_OPERAND0_ALPHA;
+        case TextureEnvParameter::Op1Alpha:
+            return GL_OPERAND1_ALPHA;
+        case TextureEnvParameter::Op2Alpha:
+            return GL_OPERAND2_ALPHA;
+        case TextureEnvParameter::PointCoordReplace:
+            return GL_COORD_REPLACE_OES;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureEnvParameter value)
+{
+    switch (value)
+    {
+        case TextureEnvParameter::Mode:
+            os << "GL_TEXTURE_ENV_MODE";
+            break;
+        case TextureEnvParameter::Color:
+            os << "GL_TEXTURE_ENV_COLOR";
+            break;
+        case TextureEnvParameter::CombineRgb:
+            os << "GL_COMBINE_RGB";
+            break;
+        case TextureEnvParameter::CombineAlpha:
+            os << "GL_COMBINE_ALPHA";
+            break;
+        case TextureEnvParameter::RgbScale:
+            os << "GL_RGB_SCALE";
+            break;
+        case TextureEnvParameter::AlphaScale:
+            os << "GL_ALPHA_SCALE";
+            break;
+        case TextureEnvParameter::Src0Rgb:
+            os << "GL_SRC0_RGB";
+            break;
+        case TextureEnvParameter::Src1Rgb:
+            os << "GL_SRC1_RGB";
+            break;
+        case TextureEnvParameter::Src2Rgb:
+            os << "GL_SRC2_RGB";
+            break;
+        case TextureEnvParameter::Src0Alpha:
+            os << "GL_SRC0_ALPHA";
+            break;
+        case TextureEnvParameter::Src1Alpha:
+            os << "GL_SRC1_ALPHA";
+            break;
+        case TextureEnvParameter::Src2Alpha:
+            os << "GL_SRC2_ALPHA";
+            break;
+        case TextureEnvParameter::Op0Rgb:
+            os << "GL_OPERAND0_RGB";
+            break;
+        case TextureEnvParameter::Op1Rgb:
+            os << "GL_OPERAND1_RGB";
+            break;
+        case TextureEnvParameter::Op2Rgb:
+            os << "GL_OPERAND2_RGB";
+            break;
+        case TextureEnvParameter::Op0Alpha:
+            os << "GL_OPERAND0_ALPHA";
+            break;
+        case TextureEnvParameter::Op1Alpha:
+            os << "GL_OPERAND1_ALPHA";
+            break;
+        case TextureEnvParameter::Op2Alpha:
+            os << "GL_OPERAND2_ALPHA";
+            break;
+        case TextureEnvParameter::PointCoordReplace:
+            os << "GL_COORD_REPLACE_OES";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureEnvTarget FromGLenum<TextureEnvTarget>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_TEXTURE_ENV:
+            return TextureEnvTarget::Env;
+        case GL_POINT_SPRITE_OES:
+            return TextureEnvTarget::PointSprite;
+        default:
+            return TextureEnvTarget::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(TextureEnvTarget from)
+{
+    switch (from)
+    {
+        case TextureEnvTarget::Env:
+            return GL_TEXTURE_ENV;
+        case TextureEnvTarget::PointSprite:
+            return GL_POINT_SPRITE_OES;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureEnvTarget value)
+{
+    switch (value)
+    {
+        case TextureEnvTarget::Env:
+            os << "GL_TEXTURE_ENV";
+            break;
+        case TextureEnvTarget::PointSprite:
+            os << "GL_POINT_SPRITE_OES";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureOp FromGLenum<TextureOp>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_ONE_MINUS_SRC_ALPHA:
+            return TextureOp::OneMinusSrcAlpha;
+        case GL_ONE_MINUS_SRC_COLOR:
+            return TextureOp::OneMinusSrcColor;
+        case GL_SRC_ALPHA:
+            return TextureOp::SrcAlpha;
+        case GL_SRC_COLOR:
+            return TextureOp::SrcColor;
+        default:
+            return TextureOp::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(TextureOp from)
+{
+    switch (from)
+    {
+        case TextureOp::OneMinusSrcAlpha:
+            return GL_ONE_MINUS_SRC_ALPHA;
+        case TextureOp::OneMinusSrcColor:
+            return GL_ONE_MINUS_SRC_COLOR;
+        case TextureOp::SrcAlpha:
+            return GL_SRC_ALPHA;
+        case TextureOp::SrcColor:
+            return GL_SRC_COLOR;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureOp value)
+{
+    switch (value)
+    {
+        case TextureOp::OneMinusSrcAlpha:
+            os << "GL_ONE_MINUS_SRC_ALPHA";
+            break;
+        case TextureOp::OneMinusSrcColor:
+            os << "GL_ONE_MINUS_SRC_COLOR";
+            break;
+        case TextureOp::SrcAlpha:
+            os << "GL_SRC_ALPHA";
+            break;
+        case TextureOp::SrcColor:
+            os << "GL_SRC_COLOR";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureSrc FromGLenum<TextureSrc>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_CONSTANT:
+            return TextureSrc::Constant;
+        case GL_PREVIOUS:
+            return TextureSrc::Previous;
+        case GL_PRIMARY_COLOR:
+            return TextureSrc::PrimaryColor;
+        case GL_TEXTURE:
+            return TextureSrc::Texture;
+        default:
+            return TextureSrc::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(TextureSrc from)
+{
+    switch (from)
+    {
+        case TextureSrc::Constant:
+            return GL_CONSTANT;
+        case TextureSrc::Previous:
+            return GL_PREVIOUS;
+        case TextureSrc::PrimaryColor:
+            return GL_PRIMARY_COLOR;
+        case TextureSrc::Texture:
+            return GL_TEXTURE;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureSrc value)
+{
+    switch (value)
+    {
+        case TextureSrc::Constant:
+            os << "GL_CONSTANT";
+            break;
+        case TextureSrc::Previous:
+            os << "GL_PREVIOUS";
+            break;
+        case TextureSrc::PrimaryColor:
+            os << "GL_PRIMARY_COLOR";
+            break;
+        case TextureSrc::Texture:
+            os << "GL_TEXTURE";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureTarget FromGLenum<TextureTarget>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_TEXTURE_2D:
+            return TextureTarget::_2D;
+        case GL_TEXTURE_2D_ARRAY:
+            return TextureTarget::_2DArray;
+        case GL_TEXTURE_2D_MULTISAMPLE:
+            return TextureTarget::_2DMultisample;
+        case GL_TEXTURE_2D_MULTISAMPLE_ARRAY_OES:
+            return TextureTarget::_2DMultisampleArray;
+        case GL_TEXTURE_3D:
+            return TextureTarget::_3D;
+        case GL_TEXTURE_EXTERNAL_OES:
+            return TextureTarget::External;
+        case GL_TEXTURE_RECTANGLE_ANGLE:
+            return TextureTarget::Rectangle;
+        case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
+            return TextureTarget::CubeMapPositiveX;
+        case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
+            return TextureTarget::CubeMapNegativeX;
+        case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
+            return TextureTarget::CubeMapPositiveY;
+        case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
+            return TextureTarget::CubeMapNegativeY;
+        case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
+            return TextureTarget::CubeMapPositiveZ;
+        case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
+            return TextureTarget::CubeMapNegativeZ;
+        case GL_TEXTURE_CUBE_MAP_ARRAY:
+            return TextureTarget::CubeMapArray;
+        case GL_TEXTURE_VIDEO_IMAGE_WEBGL:
+            return TextureTarget::VideoImage;
+        case GL_TEXTURE_BUFFER:
+            return TextureTarget::Buffer;
+        default:
+            return TextureTarget::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(TextureTarget from)
+{
+    switch (from)
+    {
+        case TextureTarget::_2D:
+            return GL_TEXTURE_2D;
+        case TextureTarget::_2DArray:
+            return GL_TEXTURE_2D_ARRAY;
+        case TextureTarget::_2DMultisample:
+            return GL_TEXTURE_2D_MULTISAMPLE;
+        case TextureTarget::_2DMultisampleArray:
+            return GL_TEXTURE_2D_MULTISAMPLE_ARRAY_OES;
+        case TextureTarget::_3D:
+            return GL_TEXTURE_3D;
+        case TextureTarget::External:
+            return GL_TEXTURE_EXTERNAL_OES;
+        case TextureTarget::Rectangle:
+            return GL_TEXTURE_RECTANGLE_ANGLE;
+        case TextureTarget::CubeMapPositiveX:
+            return GL_TEXTURE_CUBE_MAP_POSITIVE_X;
+        case TextureTarget::CubeMapNegativeX:
+            return GL_TEXTURE_CUBE_MAP_NEGATIVE_X;
+        case TextureTarget::CubeMapPositiveY:
+            return GL_TEXTURE_CUBE_MAP_POSITIVE_Y;
+        case TextureTarget::CubeMapNegativeY:
+            return GL_TEXTURE_CUBE_MAP_NEGATIVE_Y;
+        case TextureTarget::CubeMapPositiveZ:
+            return GL_TEXTURE_CUBE_MAP_POSITIVE_Z;
+        case TextureTarget::CubeMapNegativeZ:
+            return GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
+        case TextureTarget::CubeMapArray:
+            return GL_TEXTURE_CUBE_MAP_ARRAY;
+        case TextureTarget::VideoImage:
+            return GL_TEXTURE_VIDEO_IMAGE_WEBGL;
+        case TextureTarget::Buffer:
+            return GL_TEXTURE_BUFFER;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureTarget value)
+{
+    switch (value)
+    {
+        case TextureTarget::_2D:
+            os << "GL_TEXTURE_2D";
+            break;
+        case TextureTarget::_2DArray:
+            os << "GL_TEXTURE_2D_ARRAY";
+            break;
+        case TextureTarget::_2DMultisample:
+            os << "GL_TEXTURE_2D_MULTISAMPLE";
+            break;
+        case TextureTarget::_2DMultisampleArray:
+            os << "GL_TEXTURE_2D_MULTISAMPLE_ARRAY_OES";
+            break;
+        case TextureTarget::_3D:
+            os << "GL_TEXTURE_3D";
+            break;
+        case TextureTarget::External:
+            os << "GL_TEXTURE_EXTERNAL_OES";
+            break;
+        case TextureTarget::Rectangle:
+            os << "GL_TEXTURE_RECTANGLE_ANGLE";
+            break;
+        case TextureTarget::CubeMapPositiveX:
+            os << "GL_TEXTURE_CUBE_MAP_POSITIVE_X";
+            break;
+        case TextureTarget::CubeMapNegativeX:
+            os << "GL_TEXTURE_CUBE_MAP_NEGATIVE_X";
+            break;
+        case TextureTarget::CubeMapPositiveY:
+            os << "GL_TEXTURE_CUBE_MAP_POSITIVE_Y";
+            break;
+        case TextureTarget::CubeMapNegativeY:
+            os << "GL_TEXTURE_CUBE_MAP_NEGATIVE_Y";
+            break;
+        case TextureTarget::CubeMapPositiveZ:
+            os << "GL_TEXTURE_CUBE_MAP_POSITIVE_Z";
+            break;
+        case TextureTarget::CubeMapNegativeZ:
+            os << "GL_TEXTURE_CUBE_MAP_NEGATIVE_Z";
+            break;
+        case TextureTarget::CubeMapArray:
+            os << "GL_TEXTURE_CUBE_MAP_ARRAY";
+            break;
+        case TextureTarget::VideoImage:
+            os << "GL_TEXTURE_VIDEO_IMAGE_WEBGL";
+            break;
+        case TextureTarget::Buffer:
+            os << "GL_TEXTURE_BUFFER";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+TextureType FromGLenum<TextureType>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_TEXTURE_2D:
+            return TextureType::_2D;
+        case GL_TEXTURE_2D_ARRAY:
+            return TextureType::_2DArray;
+        case GL_TEXTURE_2D_MULTISAMPLE:
+            return TextureType::_2DMultisample;
+        case GL_TEXTURE_2D_MULTISAMPLE_ARRAY_OES:
+            return TextureType::_2DMultisampleArray;
+        case GL_TEXTURE_3D:
+            return TextureType::_3D;
+        case GL_TEXTURE_EXTERNAL_OES:
+            return TextureType::External;
+        case GL_TEXTURE_RECTANGLE_ANGLE:
+            return TextureType::Rectangle;
+        case GL_TEXTURE_CUBE_MAP:
+            return TextureType::CubeMap;
+        case GL_TEXTURE_CUBE_MAP_ARRAY:
+            return TextureType::CubeMapArray;
+        case GL_TEXTURE_VIDEO_IMAGE_WEBGL:
+            return TextureType::VideoImage;
+        case GL_TEXTURE_BUFFER:
+            return TextureType::Buffer;
+        default:
+            return TextureType::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(TextureType from)
+{
+    switch (from)
+    {
+        case TextureType::_2D:
+            return GL_TEXTURE_2D;
+        case TextureType::_2DArray:
+            return GL_TEXTURE_2D_ARRAY;
+        case TextureType::_2DMultisample:
+            return GL_TEXTURE_2D_MULTISAMPLE;
+        case TextureType::_2DMultisampleArray:
+            return GL_TEXTURE_2D_MULTISAMPLE_ARRAY_OES;
+        case TextureType::_3D:
+            return GL_TEXTURE_3D;
+        case TextureType::External:
+            return GL_TEXTURE_EXTERNAL_OES;
+        case TextureType::Rectangle:
+            return GL_TEXTURE_RECTANGLE_ANGLE;
+        case TextureType::CubeMap:
+            return GL_TEXTURE_CUBE_MAP;
+        case TextureType::CubeMapArray:
+            return GL_TEXTURE_CUBE_MAP_ARRAY;
+        case TextureType::VideoImage:
+            return GL_TEXTURE_VIDEO_IMAGE_WEBGL;
+        case TextureType::Buffer:
+            return GL_TEXTURE_BUFFER;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, TextureType value)
+{
+    switch (value)
+    {
+        case TextureType::_2D:
+            os << "GL_TEXTURE_2D";
+            break;
+        case TextureType::_2DArray:
+            os << "GL_TEXTURE_2D_ARRAY";
+            break;
+        case TextureType::_2DMultisample:
+            os << "GL_TEXTURE_2D_MULTISAMPLE";
+            break;
+        case TextureType::_2DMultisampleArray:
+            os << "GL_TEXTURE_2D_MULTISAMPLE_ARRAY_OES";
+            break;
+        case TextureType::_3D:
+            os << "GL_TEXTURE_3D";
+            break;
+        case TextureType::External:
+            os << "GL_TEXTURE_EXTERNAL_OES";
+            break;
+        case TextureType::Rectangle:
+            os << "GL_TEXTURE_RECTANGLE_ANGLE";
+            break;
+        case TextureType::CubeMap:
+            os << "GL_TEXTURE_CUBE_MAP";
+            break;
+        case TextureType::CubeMapArray:
+            os << "GL_TEXTURE_CUBE_MAP_ARRAY";
+            break;
+        case TextureType::VideoImage:
+            os << "GL_TEXTURE_VIDEO_IMAGE_WEBGL";
+            break;
+        case TextureType::Buffer:
+            os << "GL_TEXTURE_BUFFER";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+VertexArrayType FromGLenum<VertexArrayType>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_COLOR_ARRAY:
+            return VertexArrayType::Color;
+        case GL_NORMAL_ARRAY:
+            return VertexArrayType::Normal;
+        case GL_POINT_SIZE_ARRAY_OES:
+            return VertexArrayType::PointSize;
+        case GL_TEXTURE_COORD_ARRAY:
+            return VertexArrayType::TextureCoord;
+        case GL_VERTEX_ARRAY:
+            return VertexArrayType::Vertex;
+        default:
+            return VertexArrayType::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(VertexArrayType from)
+{
+    switch (from)
+    {
+        case VertexArrayType::Color:
+            return GL_COLOR_ARRAY;
+        case VertexArrayType::Normal:
+            return GL_NORMAL_ARRAY;
+        case VertexArrayType::PointSize:
+            return GL_POINT_SIZE_ARRAY_OES;
+        case VertexArrayType::TextureCoord:
+            return GL_TEXTURE_COORD_ARRAY;
+        case VertexArrayType::Vertex:
+            return GL_VERTEX_ARRAY;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, VertexArrayType value)
+{
+    switch (value)
+    {
+        case VertexArrayType::Color:
+            os << "GL_COLOR_ARRAY";
+            break;
+        case VertexArrayType::Normal:
+            os << "GL_NORMAL_ARRAY";
+            break;
+        case VertexArrayType::PointSize:
+            os << "GL_POINT_SIZE_ARRAY_OES";
+            break;
+        case VertexArrayType::TextureCoord:
+            os << "GL_TEXTURE_COORD_ARRAY";
+            break;
+        case VertexArrayType::Vertex:
+            os << "GL_VERTEX_ARRAY";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+template <>
+WrapMode FromGLenum<WrapMode>(GLenum from)
+{
+    switch (from)
+    {
+        case GL_CLAMP_TO_EDGE:
+            return WrapMode::ClampToEdge;
+        case GL_CLAMP_TO_BORDER:
+            return WrapMode::ClampToBorder;
+        case GL_MIRRORED_REPEAT:
+            return WrapMode::MirroredRepeat;
+        case GL_REPEAT:
+            return WrapMode::Repeat;
+        default:
+            return WrapMode::InvalidEnum;
+    }
+}
+
+GLenum ToGLenum(WrapMode from)
+{
+    switch (from)
+    {
+        case WrapMode::ClampToEdge:
+            return GL_CLAMP_TO_EDGE;
+        case WrapMode::ClampToBorder:
+            return GL_CLAMP_TO_BORDER;
+        case WrapMode::MirroredRepeat:
+            return GL_MIRRORED_REPEAT;
+        case WrapMode::Repeat:
+            return GL_REPEAT;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::ostream &operator<<(std::ostream &os, WrapMode value)
+{
+    switch (value)
+    {
+        case WrapMode::ClampToEdge:
+            os << "GL_CLAMP_TO_EDGE";
+            break;
+        case WrapMode::ClampToBorder:
+            os << "GL_CLAMP_TO_BORDER";
+            break;
+        case WrapMode::MirroredRepeat:
+            os << "GL_MIRRORED_REPEAT";
+            break;
+        case WrapMode::Repeat:
+            os << "GL_REPEAT";
+            break;
+        default:
+            os << "GL_INVALID_ENUM";
+            break;
+    }
+    return os;
+}
+
+}  // namespace gl
diff --git a/gfx/angle/checkout/src/common/PackedGLEnums_autogen.h b/gfx/angle/checkout/src/common/PackedGLEnums_autogen.h
new file mode 100644
index 0000000000..452dca344e
--- /dev/null
+++ b/gfx/angle/checkout/src/common/PackedGLEnums_autogen.h
@@ -0,0 +1,610 @@
+// GENERATED FILE - DO NOT EDIT.
+// Generated by gen_packed_gl_enums.py using data from packed_gl_enums.json.
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// PackedGLEnums_autogen.h:
+//   Declares ANGLE-specific enums classes for GLenums and functions operating
+//   on them.
+
+#ifndef COMMON_PACKEDGLENUMS_AUTOGEN_H_
+#define COMMON_PACKEDGLENUMS_AUTOGEN_H_
+
+#include <angle_gl.h>
+
+#include <cstdint>
+#include <ostream>
+
+namespace gl
+{
+
+template <typename Enum>
+Enum FromGLenum(GLenum from);
+
+enum class AlphaTestFunc : uint8_t
+{
+    AlwaysPass = 0,
+    Equal      = 1,
+    Gequal     = 2,
+    Greater    = 3,
+    Lequal     = 4,
+    Less       = 5,
+    Never      = 6,
+    NotEqual   = 7,
+
+    InvalidEnum = 8,
+    EnumCount   = 8,
+};
+
+template <>
+AlphaTestFunc FromGLenum<AlphaTestFunc>(GLenum from);
+GLenum ToGLenum(AlphaTestFunc from);
+std::ostream &operator<<(std::ostream &os, AlphaTestFunc value);
+
+enum class BufferBinding : uint8_t
+{
+    Array             = 0,
+    AtomicCounter     = 1,
+    CopyRead          = 2,
+    CopyWrite         = 3,
+    DispatchIndirect  = 4,
+    DrawIndirect      = 5,
+    ElementArray      = 6,
+    PixelPack         = 7,
+    PixelUnpack       = 8,
+    ShaderStorage     = 9,
+    Texture           = 10,
+    TransformFeedback = 11,
+    Uniform           = 12,
+
+    InvalidEnum = 13,
+    EnumCount   = 13,
+};
+
+template <>
+BufferBinding FromGLenum<BufferBinding>(GLenum from);
+GLenum ToGLenum(BufferBinding from);
+std::ostream &operator<<(std::ostream &os, BufferBinding value);
+
+enum class BufferUsage : uint8_t
+{
+    DynamicCopy = 0,
+    DynamicDraw = 1,
+    DynamicRead = 2,
+    StaticCopy  = 3,
+    StaticDraw  = 4,
+    StaticRead  = 5,
+    StreamCopy  = 6,
+    StreamDraw  = 7,
+    StreamRead  = 8,
+
+    InvalidEnum = 9,
+    EnumCount   = 9,
+};
+
+template <>
+BufferUsage FromGLenum<BufferUsage>(GLenum from);
+GLenum ToGLenum(BufferUsage from);
+std::ostream &operator<<(std::ostream &os, BufferUsage value);
+
+enum class ClientVertexArrayType : uint8_t
+{
+    Color        = 0,
+    Normal       = 1,
+    PointSize    = 2,
+    TextureCoord = 3,
+    Vertex       = 4,
+
+    InvalidEnum = 5,
+    EnumCount   = 5,
+};
+
+template <>
+ClientVertexArrayType FromGLenum<ClientVertexArrayType>(GLenum from);
+GLenum ToGLenum(ClientVertexArrayType from);
+std::ostream &operator<<(std::ostream &os, ClientVertexArrayType value);
+
+enum class CullFaceMode : uint8_t
+{
+    Back         = 0,
+    Front        = 1,
+    FrontAndBack = 2,
+
+    InvalidEnum = 3,
+    EnumCount   = 3,
+};
+
+template <>
+CullFaceMode FromGLenum<CullFaceMode>(GLenum from);
+GLenum ToGLenum(CullFaceMode from);
+std::ostream &operator<<(std::ostream &os, CullFaceMode value);
+
+enum class FilterMode : uint8_t
+{
+    Nearest              = 0,
+    Linear               = 1,
+    NearestMipmapNearest = 2,
+    NearestMipmapLinear  = 3,
+    LinearMipmapLinear   = 4,
+
+    InvalidEnum = 5,
+    EnumCount   = 5,
+};
+
+template <>
+FilterMode FromGLenum<FilterMode>(GLenum from);
+GLenum ToGLenum(FilterMode from);
+std::ostream &operator<<(std::ostream &os, FilterMode value);
+
+enum class FogMode : uint8_t
+{
+    Exp    = 0,
+    Exp2   = 1,
+    Linear = 2,
+
+    InvalidEnum = 3,
+    EnumCount   = 3,
+};
+
+template <>
+FogMode FromGLenum<FogMode>(GLenum from);
+GLenum ToGLenum(FogMode from);
+std::ostream &operator<<(std::ostream &os, FogMode value);
+
+enum class GraphicsResetStatus : uint8_t
+{
+    NoError              = 0,
+    GuiltyContextReset   = 1,
+    InnocentContextReset = 2,
+    UnknownContextReset  = 3,
+    PurgedContextResetNV = 4,
+
+    InvalidEnum = 5,
+    EnumCount   = 5,
+};
+
+template <>
+GraphicsResetStatus FromGLenum<GraphicsResetStatus>(GLenum from);
+GLenum ToGLenum(GraphicsResetStatus from);
+std::ostream &operator<<(std::ostream &os, GraphicsResetStatus value);
+
+enum class HandleType : uint8_t
+{
+    OpaqueFd    = 0,
+    ZirconVmo   = 1,
+    ZirconEvent = 2,
+
+    InvalidEnum = 3,
+    EnumCount   = 3,
+};
+
+template <>
+HandleType FromGLenum<HandleType>(GLenum from);
+GLenum ToGLenum(HandleType from);
+std::ostream &operator<<(std::ostream &os, HandleType value);
+
+enum class HintSetting : uint8_t
+{
+    DontCare = 0,
+    Fastest  = 1,
+    Nicest   = 2,
+
+    InvalidEnum = 3,
+    EnumCount   = 3,
+};
+
+template <>
+HintSetting FromGLenum<HintSetting>(GLenum from);
+GLenum ToGLenum(HintSetting from);
+std::ostream &operator<<(std::ostream &os, HintSetting value);
+
+enum class ImageLayout : uint8_t
+{
+    Undefined                      = 0,
+    General                        = 1,
+    ColorAttachment                = 2,
+    DepthStencilAttachment         = 3,
+    DepthStencilReadOnlyAttachment = 4,
+    ShaderReadOnly                 = 5,
+    TransferSrc                    = 6,
+    TransferDst                    = 7,
+    DepthReadOnlyStencilAttachment = 8,
+    DepthAttachmentStencilReadOnly = 9,
+
+    InvalidEnum = 10,
+    EnumCount   = 10,
+};
+
+template <>
+ImageLayout FromGLenum<ImageLayout>(GLenum from);
+GLenum ToGLenum(ImageLayout from);
+std::ostream &operator<<(std::ostream &os, ImageLayout value);
+
+enum class LightParameter : uint8_t
+{
+    Ambient              = 0,
+    AmbientAndDiffuse    = 1,
+    ConstantAttenuation  = 2,
+    Diffuse              = 3,
+    LinearAttenuation    = 4,
+    Position             = 5,
+    QuadraticAttenuation = 6,
+    Specular             = 7,
+    SpotCutoff           = 8,
+    SpotDirection        = 9,
+    SpotExponent         = 10,
+
+    InvalidEnum = 11,
+    EnumCount   = 11,
+};
+
+template <>
+LightParameter FromGLenum<LightParameter>(GLenum from);
+GLenum ToGLenum(LightParameter from);
+std::ostream &operator<<(std::ostream &os, LightParameter value);
+
+enum class LogicalOperation : uint8_t
+{
+    And          = 0,
+    AndInverted  = 1,
+    AndReverse   = 2,
+    Clear        = 3,
+    Copy         = 4,
+    CopyInverted = 5,
+    Equiv        = 6,
+    Invert       = 7,
+    Nand         = 8,
+    Noop         = 9,
+    Nor          = 10,
+    Or           = 11,
+    OrInverted   = 12,
+    OrReverse    = 13,
+    Set          = 14,
+    Xor          = 15,
+
+    InvalidEnum = 16,
+    EnumCount   = 16,
+};
+
+template <>
+LogicalOperation FromGLenum<LogicalOperation>(GLenum from);
+GLenum ToGLenum(LogicalOperation from);
+std::ostream &operator<<(std::ostream &os, LogicalOperation value);
+
+enum class MaterialParameter : uint8_t
+{
+    Ambient           = 0,
+    AmbientAndDiffuse = 1,
+    Diffuse           = 2,
+    Emission          = 3,
+    Shininess         = 4,
+    Specular          = 5,
+
+    InvalidEnum = 6,
+    EnumCount   = 6,
+};
+
+template <>
+MaterialParameter FromGLenum<MaterialParameter>(GLenum from);
+GLenum ToGLenum(MaterialParameter from);
+std::ostream &operator<<(std::ostream &os, MaterialParameter value);
+
+enum class MatrixType : uint8_t
+{
+    Modelview  = 0,
+    Projection = 1,
+    Texture    = 2,
+
+    InvalidEnum = 3,
+    EnumCount   = 3,
+};
+
+template <>
+MatrixType FromGLenum<MatrixType>(GLenum from);
+GLenum ToGLenum(MatrixType from);
+std::ostream &operator<<(std::ostream &os, MatrixType value);
+
+enum class PointParameter : uint8_t
+{
+    PointSizeMin             = 0,
+    PointSizeMax             = 1,
+    PointFadeThresholdSize   = 2,
+    PointDistanceAttenuation = 3,
+
+    InvalidEnum = 4,
+    EnumCount   = 4,
+};
+
+template <>
+PointParameter FromGLenum<PointParameter>(GLenum from);
+GLenum ToGLenum(PointParameter from);
+std::ostream &operator<<(std::ostream &os, PointParameter value);
+
+enum class ProvokingVertexConvention : uint8_t
+{
+    FirstVertexConvention = 0,
+    LastVertexConvention  = 1,
+
+    InvalidEnum = 2,
+    EnumCount   = 2,
+};
+
+template <>
+ProvokingVertexConvention FromGLenum<ProvokingVertexConvention>(GLenum from);
+GLenum ToGLenum(ProvokingVertexConvention from);
+std::ostream &operator<<(std::ostream &os, ProvokingVertexConvention value);
+
+enum class QueryType : uint8_t
+{
+    AnySamples                         = 0,
+    AnySamplesConservative             = 1,
+    CommandsCompleted                  = 2,
+    PrimitivesGenerated                = 3,
+    TimeElapsed                        = 4,
+    Timestamp                          = 5,
+    TransformFeedbackPrimitivesWritten = 6,
+
+    InvalidEnum = 7,
+    EnumCount   = 7,
+};
+
+template <>
+QueryType FromGLenum<QueryType>(GLenum from);
+GLenum ToGLenum(QueryType from);
+std::ostream &operator<<(std::ostream &os, QueryType value);
+
+enum class ShaderType : uint8_t
+{
+    Vertex         = 0,
+    TessControl    = 1,
+    TessEvaluation = 2,
+    Geometry       = 3,
+    Fragment       = 4,
+    Compute        = 5,
+
+    InvalidEnum = 6,
+    EnumCount   = 6,
+};
+
+template <>
+ShaderType FromGLenum<ShaderType>(GLenum from);
+GLenum ToGLenum(ShaderType from);
+std::ostream &operator<<(std::ostream &os, ShaderType value);
+
+enum class ShadingModel : uint8_t
+{
+    Flat   = 0,
+    Smooth = 1,
+
+    InvalidEnum = 2,
+    EnumCount   = 2,
+};
+
+template <>
+ShadingModel FromGLenum<ShadingModel>(GLenum from);
+GLenum ToGLenum(ShadingModel from);
+std::ostream &operator<<(std::ostream &os, ShadingModel value);
+
+enum class ShadingRate : uint8_t
+{
+    Undefined = 0,
+    _1x1      = 1,
+    _1x2      = 2,
+    _2x1      = 3,
+    _2x2      = 4,
+    _4x2      = 5,
+    _4x4      = 6,
+
+    InvalidEnum = 7,
+    EnumCount   = 7,
+};
+
+template <>
+ShadingRate FromGLenum<ShadingRate>(GLenum from);
+GLenum ToGLenum(ShadingRate from);
+std::ostream &operator<<(std::ostream &os, ShadingRate value);
+
+enum class TextureCombine : uint8_t
+{
+    Add         = 0,
+    AddSigned   = 1,
+    Dot3Rgb     = 2,
+    Dot3Rgba    = 3,
+    Interpolate = 4,
+    Modulate    = 5,
+    Replace     = 6,
+    Subtract    = 7,
+
+    InvalidEnum = 8,
+    EnumCount   = 8,
+};
+
+template <>
+TextureCombine FromGLenum<TextureCombine>(GLenum from);
+GLenum ToGLenum(TextureCombine from);
+std::ostream &operator<<(std::ostream &os, TextureCombine value);
+
+enum class TextureEnvMode : uint8_t
+{
+    Add      = 0,
+    Blend    = 1,
+    Combine  = 2,
+    Decal    = 3,
+    Modulate = 4,
+    Replace  = 5,
+
+    InvalidEnum = 6,
+    EnumCount   = 6,
+};
+
+template <>
+TextureEnvMode FromGLenum<TextureEnvMode>(GLenum from);
+GLenum ToGLenum(TextureEnvMode from);
+std::ostream &operator<<(std::ostream &os, TextureEnvMode value);
+
+enum class TextureEnvParameter : uint8_t
+{
+    Mode              = 0,
+    Color             = 1,
+    CombineRgb        = 2,
+    CombineAlpha      = 3,
+    RgbScale          = 4,
+    AlphaScale        = 5,
+    Src0Rgb           = 6,
+    Src1Rgb           = 7,
+    Src2Rgb           = 8,
+    Src0Alpha         = 9,
+    Src1Alpha         = 10,
+    Src2Alpha         = 11,
+    Op0Rgb            = 12,
+    Op1Rgb            = 13,
+    Op2Rgb            = 14,
+    Op0Alpha          = 15,
+    Op1Alpha          = 16,
+    Op2Alpha          = 17,
+    PointCoordReplace = 18,
+
+    InvalidEnum = 19,
+    EnumCount   = 19,
+};
+
+template <>
+TextureEnvParameter FromGLenum<TextureEnvParameter>(GLenum from);
+GLenum ToGLenum(TextureEnvParameter from);
+std::ostream &operator<<(std::ostream &os, TextureEnvParameter value);
+
+enum class TextureEnvTarget : uint8_t
+{
+    Env         = 0,
+    PointSprite = 1,
+
+    InvalidEnum = 2,
+    EnumCount   = 2,
+};
+
+template <>
+TextureEnvTarget FromGLenum<TextureEnvTarget>(GLenum from);
+GLenum ToGLenum(TextureEnvTarget from);
+std::ostream &operator<<(std::ostream &os, TextureEnvTarget value);
+
+enum class TextureOp : uint8_t
+{
+    OneMinusSrcAlpha = 0,
+    OneMinusSrcColor = 1,
+    SrcAlpha         = 2,
+    SrcColor         = 3,
+
+    InvalidEnum = 4,
+    EnumCount   = 4,
+};
+
+template <>
+TextureOp FromGLenum<TextureOp>(GLenum from);
+GLenum ToGLenum(TextureOp from);
+std::ostream &operator<<(std::ostream &os, TextureOp value);
+
+enum class TextureSrc : uint8_t
+{
+    Constant     = 0,
+    Previous     = 1,
+    PrimaryColor = 2,
+    Texture      = 3,
+
+    InvalidEnum = 4,
+    EnumCount   = 4,
+};
+
+template <>
+TextureSrc FromGLenum<TextureSrc>(GLenum from);
+GLenum ToGLenum(TextureSrc from);
+std::ostream &operator<<(std::ostream &os, TextureSrc value);
+
+enum class TextureTarget : uint8_t
+{
+    _2D                 = 0,
+    _2DArray            = 1,
+    _2DMultisample      = 2,
+    _2DMultisampleArray = 3,
+    _3D                 = 4,
+    External            = 5,
+    Rectangle           = 6,
+    CubeMapPositiveX    = 7,
+    CubeMapNegativeX    = 8,
+    CubeMapPositiveY    = 9,
+    CubeMapNegativeY    = 10,
+    CubeMapPositiveZ    = 11,
+    CubeMapNegativeZ    = 12,
+    CubeMapArray        = 13,
+    VideoImage          = 14,
+    Buffer              = 15,
+
+    InvalidEnum = 16,
+    EnumCount   = 16,
+};
+
+template <>
+TextureTarget FromGLenum<TextureTarget>(GLenum from);
+GLenum ToGLenum(TextureTarget from);
+std::ostream &operator<<(std::ostream &os, TextureTarget value);
+
+enum class TextureType : uint8_t
+{
+    _2D                 = 0,
+    _2DArray            = 1,
+    _2DMultisample      = 2,
+    _2DMultisampleArray = 3,
+    _3D                 = 4,
+    External            = 5,
+    Rectangle           = 6,
+    CubeMap             = 7,
+    CubeMapArray        = 8,
+    VideoImage          = 9,
+    Buffer              = 10,
+
+    InvalidEnum = 11,
+    EnumCount   = 11,
+};
+
+template <>
+TextureType FromGLenum<TextureType>(GLenum from);
+GLenum ToGLenum(TextureType from);
+std::ostream &operator<<(std::ostream &os, TextureType value);
+
+enum class VertexArrayType : uint8_t
+{
+    Color        = 0,
+    Normal       = 1,
+    PointSize    = 2,
+    TextureCoord = 3,
+    Vertex       = 4,
+
+    InvalidEnum = 5,
+    EnumCount   = 5,
+};
+
+template <>
+VertexArrayType FromGLenum<VertexArrayType>(GLenum from);
+GLenum ToGLenum(VertexArrayType from);
+std::ostream &operator<<(std::ostream &os, VertexArrayType value);
+
+enum class WrapMode : uint8_t
+{
+    ClampToEdge    = 0,
+    ClampToBorder  = 1,
+    MirroredRepeat = 2,
+    Repeat         = 3,
+
+    InvalidEnum = 4,
+    EnumCount   = 4,
+};
+
+template <>
+WrapMode FromGLenum<WrapMode>(GLenum from);
+GLenum ToGLenum(WrapMode from);
+std::ostream &operator<<(std::ostream &os, WrapMode value);
+
+}  // namespace gl
+
+#endif  // COMMON_PACKEDGLENUMS_AUTOGEN_H_
diff --git a/gfx/angle/checkout/src/common/PoolAlloc.cpp b/gfx/angle/checkout/src/common/PoolAlloc.cpp
new file mode 100644
index 0000000000..eef033ca04
--- /dev/null
+++ b/gfx/angle/checkout/src/common/PoolAlloc.cpp
@@ -0,0 +1,487 @@
+//
+// Copyright 2019 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// PoolAlloc.cpp:
+//    Implements the class methods for PoolAllocator and Allocation classes.
+//
+
+#include "common/PoolAlloc.h"
+
+#include <assert.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "common/angleutils.h"
+#include "common/debug.h"
+#include "common/mathutil.h"
+#include "common/platform.h"
+#include "common/tls.h"
+
+namespace angle
+{
+// If we are using guard blocks, we must track each individual allocation.  If we aren't using guard
+// blocks, these never get instantiated, so won't have any impact.
+
+class Allocation
+{
+  public:
+    Allocation(size_t size, unsigned char *mem, Allocation *prev = 0)
+        : mSize(size), mMem(mem), mPrevAlloc(prev)
+    {
+        // Allocations are bracketed:
+        //
+        //    [allocationHeader][initialGuardBlock][userData][finalGuardBlock]
+        //
+        // This would be cleaner with if (kGuardBlockSize)..., but that makes the compiler print
+        // warnings about 0 length memsets, even with the if() protecting them.
+#if defined(ANGLE_POOL_ALLOC_GUARD_BLOCKS)
+        memset(preGuard(), kGuardBlockBeginVal, kGuardBlockSize);
+        memset(data(), kUserDataFill, mSize);
+        memset(postGuard(), kGuardBlockEndVal, kGuardBlockSize);
+#endif
+    }
+
+    void checkAllocList() const;
+
+    static size_t AlignedHeaderSize(uint8_t *allocationBasePtr, size_t alignment)
+    {
+        // Make sure that the data offset after the header is aligned to the given alignment.
+        size_t base = reinterpret_cast<size_t>(allocationBasePtr);
+        return rx::roundUpPow2(base + kGuardBlockSize + HeaderSize(), alignment) - base;
+    }
+
+    // Return total size needed to accommodate user buffer of 'size',
+    // plus our tracking data and any necessary alignments.
+    static size_t AllocationSize(uint8_t *allocationBasePtr,
+                                 size_t size,
+                                 size_t alignment,
+                                 size_t *preAllocationPaddingOut)
+    {
+        // The allocation will be laid out as such:
+        //
+        //                      Aligned to |alignment|
+        //                               ^
+        //   preAllocationPaddingOut     |
+        //        ___^___                |
+        //       /       \               |
+        //       <padding>[header][guard][data][guard]
+        //       \___________ __________/
+        //                   V
+        //              dataOffset
+        //
+        // Note that alignment is at least as much as a pointer alignment, so the pointers in the
+        // header are also necessarily aligned appropriately.
+        //
+        size_t dataOffset        = AlignedHeaderSize(allocationBasePtr, alignment);
+        *preAllocationPaddingOut = dataOffset - HeaderSize() - kGuardBlockSize;
+
+        return dataOffset + size + kGuardBlockSize;
+    }
+
+    // Given memory pointing to |header|, returns |data|.
+    static uint8_t *GetDataPointer(uint8_t *memory, size_t alignment)
+    {
+        uint8_t *alignedPtr = memory + kGuardBlockSize + HeaderSize();
+
+        // |memory| must be aligned already such that user data is aligned to |alignment|.
+        ASSERT((reinterpret_cast<uintptr_t>(alignedPtr) & (alignment - 1)) == 0);
+
+        return alignedPtr;
+    }
+
+  private:
+    void checkGuardBlock(unsigned char *blockMem, unsigned char val, const char *locText) const;
+
+    void checkAlloc() const
+    {
+        checkGuardBlock(preGuard(), kGuardBlockBeginVal, "before");
+        checkGuardBlock(postGuard(), kGuardBlockEndVal, "after");
+    }
+
+    // Find offsets to pre and post guard blocks, and user data buffer
+    unsigned char *preGuard() const { return mMem + HeaderSize(); }
+    unsigned char *data() const { return preGuard() + kGuardBlockSize; }
+    unsigned char *postGuard() const { return data() + mSize; }
+    size_t mSize;            // size of the user data area
+    unsigned char *mMem;     // beginning of our allocation (points to header)
+    Allocation *mPrevAlloc;  // prior allocation in the chain
+
+    static constexpr unsigned char kGuardBlockBeginVal = 0xfb;
+    static constexpr unsigned char kGuardBlockEndVal   = 0xfe;
+    static constexpr unsigned char kUserDataFill       = 0xcd;
+#if defined(ANGLE_POOL_ALLOC_GUARD_BLOCKS)
+    static constexpr size_t kGuardBlockSize = 16;
+    static constexpr size_t HeaderSize() { return sizeof(Allocation); }
+#else
+    static constexpr size_t kGuardBlockSize = 0;
+    static constexpr size_t HeaderSize() { return 0; }
+#endif
+};
+
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+class PageHeader
+{
+  public:
+    PageHeader(PageHeader *nextPage, size_t pageCount)
+        : nextPage(nextPage),
+          pageCount(pageCount)
+#    if defined(ANGLE_POOL_ALLOC_GUARD_BLOCKS)
+          ,
+          lastAllocation(nullptr)
+#    endif
+    {}
+
+    ~PageHeader()
+    {
+#    if defined(ANGLE_POOL_ALLOC_GUARD_BLOCKS)
+        if (lastAllocation)
+        {
+            lastAllocation->checkAllocList();
+        }
+#    endif
+    }
+
+    PageHeader *nextPage;
+    size_t pageCount;
+#    if defined(ANGLE_POOL_ALLOC_GUARD_BLOCKS)
+    Allocation *lastAllocation;
+#    endif
+};
+#endif
+
+//
+// Implement the functionality of the PoolAllocator class, which
+// is documented in PoolAlloc.h.
+//
+PoolAllocator::PoolAllocator(int growthIncrement, int allocationAlignment)
+    : mAlignment(allocationAlignment),
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+      mPageSize(growthIncrement),
+      mFreeList(nullptr),
+      mInUseList(nullptr),
+      mNumCalls(0),
+      mTotalBytes(0),
+#endif
+      mLocked(false)
+{
+    initialize(growthIncrement, allocationAlignment);
+}
+
+void PoolAllocator::initialize(int pageSize, int alignment)
+{
+    mAlignment = alignment;
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+    mPageSize       = pageSize;
+    mPageHeaderSkip = sizeof(PageHeader);
+
+    // Alignment == 1 is a special fast-path where fastAllocate() is enabled
+    if (mAlignment != 1)
+    {
+#endif
+        // Adjust mAlignment to be at least pointer aligned and
+        // power of 2.
+        //
+        size_t minAlign = sizeof(void *);
+        if (mAlignment < minAlign)
+        {
+            mAlignment = minAlign;
+        }
+        mAlignment = gl::ceilPow2(static_cast<unsigned int>(mAlignment));
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+    }
+    //
+    // Don't allow page sizes we know are smaller than all common
+    // OS page sizes.
+    //
+    if (mPageSize < 4 * 1024)
+    {
+        mPageSize = 4 * 1024;
+    }
+
+    //
+    // A large mCurrentPageOffset indicates a new page needs to
+    // be obtained to allocate memory.
+    //
+    mCurrentPageOffset = mPageSize;
+
+#else  // !defined(ANGLE_DISABLE_POOL_ALLOC)
+    mStack.push_back({});
+#endif
+}
+
+PoolAllocator::~PoolAllocator()
+{
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+    while (mInUseList)
+    {
+        PageHeader *next = mInUseList->nextPage;
+        mInUseList->~PageHeader();
+        delete[] reinterpret_cast<char *>(mInUseList);
+        mInUseList = next;
+    }
+    // We should not check the guard blocks
+    // here, because we did it already when the block was
+    // placed into the free list.
+    //
+    while (mFreeList)
+    {
+        PageHeader *next = mFreeList->nextPage;
+        delete[] reinterpret_cast<char *>(mFreeList);
+        mFreeList = next;
+    }
+#else  // !defined(ANGLE_DISABLE_POOL_ALLOC)
+    for (auto &allocs : mStack)
+    {
+        for (auto alloc : allocs)
+        {
+            free(alloc);
+        }
+    }
+    mStack.clear();
+#endif
+}
+
+//
+// Check a single guard block for damage
+//
+void Allocation::checkGuardBlock(unsigned char *blockMem,
+                                 unsigned char val,
+                                 const char *locText) const
+{
+#if defined(ANGLE_POOL_ALLOC_GUARD_BLOCKS)
+    for (size_t x = 0; x < kGuardBlockSize; x++)
+    {
+        if (blockMem[x] != val)
+        {
+            char assertMsg[80];
+            // We don't print the assert message.  It's here just to be helpful.
+            snprintf(assertMsg, sizeof(assertMsg),
+                     "PoolAlloc: Damage %s %zu byte allocation at 0x%p\n", locText, mSize, data());
+            assert(0 && "PoolAlloc: Damage in guard block");
+        }
+    }
+#endif
+}
+
+void PoolAllocator::push()
+{
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+    AllocState state = {mCurrentPageOffset, mInUseList};
+
+    mStack.push_back(state);
+
+    //
+    // Indicate there is no current page to allocate from.
+    //
+    mCurrentPageOffset = mPageSize;
+#else  // !defined(ANGLE_DISABLE_POOL_ALLOC)
+    mStack.push_back({});
+#endif
+}
+
+// Do a mass-deallocation of all the individual allocations that have occurred since the last
+// push(), or since the last pop(), or since the object's creation.
+//
+// The deallocated pages are saved for future allocations.
+void PoolAllocator::pop()
+{
+    if (mStack.size() < 1)
+    {
+        return;
+    }
+
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+    PageHeader *page   = mStack.back().page;
+    mCurrentPageOffset = mStack.back().offset;
+
+    while (mInUseList != page)
+    {
+        // invoke destructor to free allocation list
+        mInUseList->~PageHeader();
+
+        PageHeader *nextInUse = mInUseList->nextPage;
+        if (mInUseList->pageCount > 1)
+        {
+            delete[] reinterpret_cast<char *>(mInUseList);
+        }
+        else
+        {
+            mInUseList->nextPage = mFreeList;
+            mFreeList            = mInUseList;
+        }
+        mInUseList = nextInUse;
+    }
+
+    mStack.pop_back();
+#else  // !defined(ANGLE_DISABLE_POOL_ALLOC)
+    for (auto &alloc : mStack.back())
+    {
+        free(alloc);
+    }
+    mStack.pop_back();
+#endif
+}
+
+//
+// Do a mass-deallocation of all the individual allocations
+// that have occurred.
+//
+void PoolAllocator::popAll()
+{
+    while (mStack.size() > 0)
+        pop();
+}
+
+void *PoolAllocator::allocate(size_t numBytes)
+{
+    ASSERT(!mLocked);
+
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+    //
+    // Just keep some interesting statistics.
+    //
+    ++mNumCalls;
+    mTotalBytes += numBytes;
+
+    uint8_t *currentPagePtr = reinterpret_cast<uint8_t *>(mInUseList) + mCurrentPageOffset;
+
+    size_t preAllocationPadding = 0;
+    size_t allocationSize =
+        Allocation::AllocationSize(currentPagePtr, numBytes, mAlignment, &preAllocationPadding);
+
+    // Integer overflow is unexpected.
+    ASSERT(allocationSize >= numBytes);
+
+    // Do the allocation, most likely case first, for efficiency.
+    if (allocationSize <= mPageSize - mCurrentPageOffset)
+    {
+        // There is enough room to allocate from the current page at mCurrentPageOffset.
+        uint8_t *memory = currentPagePtr + preAllocationPadding;
+        mCurrentPageOffset += allocationSize;
+
+        return initializeAllocation(memory, numBytes);
+    }
+
+    if (allocationSize > mPageSize - mPageHeaderSkip)
+    {
+        // If the allocation is larger than a whole page, do a multi-page allocation.  These are not
+        // mixed with the others.  The OS is efficient in allocating and freeing multiple pages.
+
+        // We don't know what the alignment of the new allocated memory will be, so conservatively
+        // allocate enough memory for up to alignment extra bytes being needed.
+        allocationSize = Allocation::AllocationSize(reinterpret_cast<uint8_t *>(mPageHeaderSkip),
+                                                    numBytes, mAlignment, &preAllocationPadding);
+
+        size_t numBytesToAlloc = allocationSize + mPageHeaderSkip + mAlignment;
+
+        // Integer overflow is unexpected.
+        ASSERT(numBytesToAlloc >= allocationSize);
+
+        PageHeader *memory = reinterpret_cast<PageHeader *>(::new char[numBytesToAlloc]);
+        if (memory == nullptr)
+        {
+            return nullptr;
+        }
+
+        // Use placement-new to initialize header
+        new (memory) PageHeader(mInUseList, (numBytesToAlloc + mPageSize - 1) / mPageSize);
+        mInUseList = memory;
+
+        // Make next allocation come from a new page
+        mCurrentPageOffset = mPageSize;
+
+        // Now that we actually have the pointer, make sure the data pointer will be aligned.
+        currentPagePtr = reinterpret_cast<uint8_t *>(memory) + mPageHeaderSkip;
+        Allocation::AllocationSize(currentPagePtr, numBytes, mAlignment, &preAllocationPadding);
+
+        return initializeAllocation(currentPagePtr + preAllocationPadding, numBytes);
+    }
+
+    uint8_t *newPageAddr = allocateNewPage(numBytes);
+    return initializeAllocation(newPageAddr, numBytes);
+
+#else  // !defined(ANGLE_DISABLE_POOL_ALLOC)
+
+    void *alloc = malloc(numBytes + mAlignment - 1);
+    mStack.back().push_back(alloc);
+
+    intptr_t intAlloc = reinterpret_cast<intptr_t>(alloc);
+    intAlloc          = rx::roundUpPow2<intptr_t>(intAlloc, mAlignment);
+    return reinterpret_cast<void *>(intAlloc);
+#endif
+}
+
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+uint8_t *PoolAllocator::allocateNewPage(size_t numBytes)
+{
+    // Need a simple page to allocate from.  Pick a page from the free list, if any.  Otherwise need
+    // to make the allocation.
+    PageHeader *memory;
+    if (mFreeList)
+    {
+        memory    = mFreeList;
+        mFreeList = mFreeList->nextPage;
+    }
+    else
+    {
+        memory = reinterpret_cast<PageHeader *>(::new char[mPageSize]);
+        if (memory == nullptr)
+        {
+            return nullptr;
+        }
+    }
+    // Use placement-new to initialize header
+    new (memory) PageHeader(mInUseList, 1);
+    mInUseList = memory;
+
+    // Leave room for the page header.
+    mCurrentPageOffset      = mPageHeaderSkip;
+    uint8_t *currentPagePtr = reinterpret_cast<uint8_t *>(mInUseList) + mCurrentPageOffset;
+
+    size_t preAllocationPadding = 0;
+    size_t allocationSize =
+        Allocation::AllocationSize(currentPagePtr, numBytes, mAlignment, &preAllocationPadding);
+
+    mCurrentPageOffset += allocationSize;
+
+    // The new allocation is made after the page header and any alignment required before it.
+    return reinterpret_cast<uint8_t *>(mInUseList) + mPageHeaderSkip + preAllocationPadding;
+}
+
+void *PoolAllocator::initializeAllocation(uint8_t *memory, size_t numBytes)
+{
+#    if defined(ANGLE_POOL_ALLOC_GUARD_BLOCKS)
+    new (memory) Allocation(numBytes, memory, mInUseList->lastAllocation);
+    mInUseList->lastAllocation = reinterpret_cast<Allocation *>(memory);
+#    endif
+
+    return Allocation::GetDataPointer(memory, mAlignment);
+}
+#endif
+
+void PoolAllocator::lock()
+{
+    ASSERT(!mLocked);
+    mLocked = true;
+}
+
+void PoolAllocator::unlock()
+{
+    ASSERT(mLocked);
+    mLocked = false;
+}
+
+//
+// Check all allocations in a list for damage by calling check on each.
+//
+void Allocation::checkAllocList() const
+{
+    for (const Allocation *alloc = this; alloc != nullptr; alloc = alloc->mPrevAlloc)
+    {
+        alloc->checkAlloc();
+    }
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/PoolAlloc.h b/gfx/angle/checkout/src/common/PoolAlloc.h
new file mode 100644
index 0000000000..536848f198
--- /dev/null
+++ b/gfx/angle/checkout/src/common/PoolAlloc.h
@@ -0,0 +1,181 @@
+//
+// Copyright 2019 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// PoolAlloc.h:
+//    Defines the class interface for PoolAllocator.
+//
+
+#ifndef COMMON_POOLALLOC_H_
+#define COMMON_POOLALLOC_H_
+
+#if !defined(NDEBUG)
+#    define ANGLE_POOL_ALLOC_GUARD_BLOCKS  // define to enable guard block checking
+#endif
+
+//
+// This header defines an allocator that can be used to efficiently
+// allocate a large number of small requests for heap memory, with the
+// intention that they are not individually deallocated, but rather
+// collectively deallocated at one time.
+//
+// This simultaneously
+//
+// * Makes each individual allocation much more efficient; the
+//     typical allocation is trivial.
+// * Completely avoids the cost of doing individual deallocation.
+// * Saves the trouble of tracking down and plugging a large class of leaks.
+//
+// Individual classes can use this allocator by supplying their own
+// new and delete methods.
+//
+
+#include "angleutils.h"
+#include "common/debug.h"
+
+namespace angle
+{
+class Allocation;
+class PageHeader;
+
+//
+// There are several stacks.  One is to track the pushing and popping
+// of the user, and not yet implemented.  The others are simply a
+// repositories of free pages or used pages.
+//
+// Page stacks are linked together with a simple header at the beginning
+// of each allocation obtained from the underlying OS.  Multi-page allocations
+// are returned to the OS.  Individual page allocations are kept for future
+// re-use.
+//
+// The "page size" used is not, nor must it match, the underlying OS
+// page size.  But, having it be about that size or equal to a set of
+// pages is likely most optimal.
+//
+class PoolAllocator : angle::NonCopyable
+{
+  public:
+    static const int kDefaultAlignment = sizeof(void *);
+    //
+    // Create PoolAllocator. If alignment is set to 1 byte then fastAllocate()
+    //  function can be used to make allocations with less overhead.
+    //
+    PoolAllocator(int growthIncrement = 8 * 1024, int allocationAlignment = kDefaultAlignment);
+
+    //
+    // Don't call the destructor just to free up the memory, call pop()
+    //
+    ~PoolAllocator();
+
+    //
+    // Initialize page size and alignment after construction
+    //
+    void initialize(int pageSize, int alignment);
+
+    //
+    // Call push() to establish a new place to pop memory to.  Does not
+    // have to be called to get things started.
+    //
+    void push();
+
+    //
+    // Call pop() to free all memory allocated since the last call to push(),
+    // or if no last call to push, frees all memory since first allocation.
+    //
+    void pop();
+
+    //
+    // Call popAll() to free all memory allocated.
+    //
+    void popAll();
+
+    //
+    // Call allocate() to actually acquire memory.  Returns 0 if no memory
+    // available, otherwise a properly aligned pointer to 'numBytes' of memory.
+    //
+    void *allocate(size_t numBytes);
+
+    //
+    // Call fastAllocate() for a faster allocate function that does minimal bookkeeping
+    // preCondition: Allocator must have been created w/ alignment of 1
+    ANGLE_INLINE uint8_t *fastAllocate(size_t numBytes)
+    {
+#if defined(ANGLE_DISABLE_POOL_ALLOC)
+        return reinterpret_cast<uint8_t *>(allocate(numBytes));
+#else
+        ASSERT(mAlignment == 1);
+        // No multi-page allocations
+        ASSERT(numBytes <= (mPageSize - mPageHeaderSkip));
+        //
+        // Do the allocation, most likely case inline first, for efficiency.
+        //
+        if (numBytes <= mPageSize - mCurrentPageOffset)
+        {
+            //
+            // Safe to allocate from mCurrentPageOffset.
+            //
+            uint8_t *memory = reinterpret_cast<uint8_t *>(mInUseList) + mCurrentPageOffset;
+            mCurrentPageOffset += numBytes;
+            return memory;
+        }
+        return allocateNewPage(numBytes);
+#endif
+    }
+
+    // There is no deallocate.  The point of this class is that deallocation can be skipped by the
+    // user of it, as the model of use is to simultaneously deallocate everything at once by calling
+    // pop(), and to not have to solve memory leak problems.
+
+    // Catch unwanted allocations.
+    // TODO(jmadill): Remove this when we remove the global allocator.
+    void lock();
+    void unlock();
+
+  private:
+    size_t mAlignment;  // all returned allocations will be aligned at
+                        // this granularity, which will be a power of 2
+#if !defined(ANGLE_DISABLE_POOL_ALLOC)
+    struct AllocState
+    {
+        size_t offset;
+        PageHeader *page;
+    };
+    using AllocStack = std::vector<AllocState>;
+
+    // Slow path of allocation when we have to get a new page.
+    uint8_t *allocateNewPage(size_t numBytes);
+    // Track allocations if and only if we're using guard blocks
+    void *initializeAllocation(uint8_t *memory, size_t numBytes);
+
+    // Granularity of allocation from the OS
+    size_t mPageSize;
+    // Amount of memory to skip to make room for the page header (which is the size of the page
+    // header, or PageHeader in PoolAlloc.cpp)
+    size_t mPageHeaderSkip;
+    // Next offset in top of inUseList to allocate from.  This offset is not necessarily aligned to
+    // anything.  When an allocation is made, the data is aligned to mAlignment, and the header (if
+    // any) will align to pointer size by extension (since mAlignment is made aligned to at least
+    // pointer size).
+    size_t mCurrentPageOffset;
+    // List of popped memory
+    PageHeader *mFreeList;
+    // List of all memory currently being used.  The head of this list is where allocations are
+    // currently being made from.
+    PageHeader *mInUseList;
+    // Stack of where to allocate from, to partition pool
+    AllocStack mStack;
+
+    int mNumCalls;       // just an interesting statistic
+    size_t mTotalBytes;  // just an interesting statistic
+
+#else  // !defined(ANGLE_DISABLE_POOL_ALLOC)
+    std::vector<std::vector<void *>> mStack;
+#endif
+
+    bool mLocked;
+};
+
+}  // namespace angle
+
+#endif  // COMMON_POOLALLOC_H_
diff --git a/gfx/angle/checkout/src/common/Spinlock.h b/gfx/angle/checkout/src/common/Spinlock.h
new file mode 100644
index 0000000000..494da0943e
--- /dev/null
+++ b/gfx/angle/checkout/src/common/Spinlock.h
@@ -0,0 +1,71 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Spinlock.h:
+//   Spinlock is a lock that loops actively until it gets the resource.
+//   Only use it when the lock will be granted in reasonably short time.
+
+#ifndef COMMON_SPINLOCK_H_
+#define COMMON_SPINLOCK_H_
+
+#include <atomic>
+
+// TODO(jplate) Add pause for ARM, http://anglebug.com:6067
+#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
+extern "C" void _mm_pause();
+#    pragma intrinsic(_mm_pause)
+#    define ANGLE_SMT_PAUSE() _mm_pause()
+#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+#    define ANGLE_SMT_PAUSE() __asm__ __volatile__("pause;")
+#else
+#    define ANGLE_SMT_PAUSE() static_cast<void>(0)
+#endif
+
+namespace angle
+{
+
+class Spinlock
+{
+  public:
+    Spinlock() noexcept;
+
+    bool try_lock() noexcept;
+    void lock() noexcept;
+    void unlock() noexcept;
+
+  private:
+    std::atomic_bool mLock;
+};
+
+inline Spinlock::Spinlock() noexcept : mLock(false) {}
+
+inline bool Spinlock::try_lock() noexcept
+{
+    // Relaxed check first to prevent unnecessary cache misses.
+    return !mLock.load(std::memory_order_relaxed) &&
+           !mLock.exchange(true, std::memory_order_acquire);
+}
+
+inline void Spinlock::lock() noexcept
+{
+    while (mLock.exchange(true, std::memory_order_acquire))
+    {
+        // Relaxed wait to prevent unnecessary cache misses.
+        while (mLock.load(std::memory_order_relaxed))
+        {
+            // Optimization for simultaneous multithreading.
+            ANGLE_SMT_PAUSE();
+        }
+    }
+}
+
+inline void Spinlock::unlock() noexcept
+{
+    mLock.store(false, std::memory_order_release);
+}
+
+}  // namespace angle
+
+#endif  // COMMON_SPINLOCK_H_
diff --git a/gfx/angle/checkout/src/common/SynchronizedValue.h b/gfx/angle/checkout/src/common/SynchronizedValue.h
new file mode 100644
index 0000000000..95432cfbcd
--- /dev/null
+++ b/gfx/angle/checkout/src/common/SynchronizedValue.h
@@ -0,0 +1,540 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// SynchronizedValue.h:
+//   A class that ensures that the correct mutex is locked when the encapsulated data is accessed.
+//   Based on boost::synchronized_value, which probably becomes part of the next C++ standard.
+// https://www.boost.org/doc/libs/1_76_0/doc/html/thread/sds.html#thread.sds.synchronized_valuesxxx
+
+#ifndef COMMON_SYNCHRONIZEDVALUE_H_
+#define COMMON_SYNCHRONIZEDVALUE_H_
+
+#include "common/debug.h"
+
+#include <mutex>
+#include <type_traits>
+
+namespace angle
+{
+
+template <typename T, typename Lockable = std::mutex>
+class ConstStrictLockPtr
+{
+  public:
+    using value_type = T;
+    using mutex_type = Lockable;
+
+    ConstStrictLockPtr(const T &value, Lockable &mutex) : mLock(mutex), mValue(value) {}
+    ConstStrictLockPtr(const T &value, Lockable &mutex, std::adopt_lock_t) noexcept
+        : mLock(mutex, std::adopt_lock), mValue(value)
+    {}
+
+    ConstStrictLockPtr(ConstStrictLockPtr &&other) noexcept
+        : mLock(std::move(other.mLock)), mValue(other.mValue)
+    {}
+
+    ConstStrictLockPtr(const ConstStrictLockPtr &) = delete;
+    ConstStrictLockPtr &operator=(const ConstStrictLockPtr &) = delete;
+
+    ~ConstStrictLockPtr() = default;
+
+    const T *operator->() const { return &mValue; }
+    const T &operator*() const { return mValue; }
+
+  protected:
+    std::unique_lock<Lockable> mLock;
+    T const &mValue;
+};
+
+template <typename T, typename Lockable = std::mutex>
+class StrictLockPtr : public ConstStrictLockPtr<T, Lockable>
+{
+  private:
+    using BaseType = ConstStrictLockPtr<T, Lockable>;
+
+  public:
+    StrictLockPtr(T &value, Lockable &mutex) : BaseType(value, mutex) {}
+    StrictLockPtr(T &value, Lockable &mutex, std::adopt_lock_t) noexcept
+        : BaseType(value, mutex, std::adopt_lock)
+    {}
+
+    StrictLockPtr(StrictLockPtr &&other) noexcept
+        : BaseType(std::move(static_cast<BaseType &&>(other)))
+    {}
+
+    StrictLockPtr(const StrictLockPtr &) = delete;
+    StrictLockPtr &operator=(const StrictLockPtr &) = delete;
+
+    ~StrictLockPtr() = default;
+
+    T *operator->() { return const_cast<T *>(&this->mValue); }
+    T &operator*() { return const_cast<T &>(this->mValue); }
+};
+
+template <typename SV>
+struct SynchronizedValueStrictLockPtr
+{
+    using type = StrictLockPtr<typename SV::value_type, typename SV::mutex_type>;
+};
+
+template <typename SV>
+struct SynchronizedValueStrictLockPtr<const SV>
+{
+    using type = ConstStrictLockPtr<typename SV::value_type, typename SV::mutex_type>;
+};
+
+template <typename T, typename Lockable = std::mutex>
+class ConstUniqueLockPtr : public std::unique_lock<Lockable>
+{
+  private:
+    using BaseType = std::unique_lock<Lockable>;
+
+  public:
+    using value_type = T;
+    using mutex_type = Lockable;
+
+    ConstUniqueLockPtr(const T &value, Lockable &mutex) : BaseType(mutex), mValue(value) {}
+    ConstUniqueLockPtr(const T &value, Lockable &mutex, std::adopt_lock_t) noexcept
+        : BaseType(mutex, std::adopt_lock), mValue(value)
+    {}
+    ConstUniqueLockPtr(const T &value, Lockable &mutex, std::defer_lock_t) noexcept
+        : BaseType(mutex, std::defer_lock), mValue(value)
+    {}
+    ConstUniqueLockPtr(const T &value, Lockable &mutex, std::try_to_lock_t) noexcept
+        : BaseType(mutex, std::try_to_lock), mValue(value)
+    {}
+
+    ConstUniqueLockPtr(ConstUniqueLockPtr &&other) noexcept
+        : BaseType(std::move(static_cast<BaseType &&>(other))), mValue(other.mValue)
+    {}
+
+    ConstUniqueLockPtr(const ConstUniqueLockPtr &) = delete;
+    ConstUniqueLockPtr &operator=(const ConstUniqueLockPtr &) = delete;
+
+    ~ConstUniqueLockPtr() = default;
+
+    const T *operator->() const
+    {
+        ASSERT(this->owns_lock());
+        return &mValue;
+    }
+    const T &operator*() const
+    {
+        ASSERT(this->owns_lock());
+        return mValue;
+    }
+
+  protected:
+    T const &mValue;
+};
+
+template <typename T, typename Lockable = std::mutex>
+class UniqueLockPtr : public ConstUniqueLockPtr<T, Lockable>
+{
+  private:
+    using BaseType = ConstUniqueLockPtr<T, Lockable>;
+
+  public:
+    UniqueLockPtr(T &value, Lockable &mutex) : BaseType(value, mutex) {}
+    UniqueLockPtr(T &value, Lockable &mutex, std::adopt_lock_t) noexcept
+        : BaseType(value, mutex, std::adopt_lock)
+    {}
+    UniqueLockPtr(T &value, Lockable &mutex, std::defer_lock_t) noexcept
+        : BaseType(value, mutex, std::defer_lock)
+    {}
+    UniqueLockPtr(T &value, Lockable &mutex, std::try_to_lock_t) noexcept
+        : BaseType(value, mutex, std::try_to_lock)
+    {}
+
+    UniqueLockPtr(UniqueLockPtr &&other) noexcept
+        : BaseType(std::move(static_cast<BaseType &&>(other)))
+    {}
+
+    UniqueLockPtr(const UniqueLockPtr &) = delete;
+    UniqueLockPtr &operator=(const UniqueLockPtr &) = delete;
+
+    ~UniqueLockPtr() = default;
+
+    T *operator->()
+    {
+        ASSERT(this->owns_lock());
+        return const_cast<T *>(&this->mValue);
+    }
+    T &operator*()
+    {
+        ASSERT(this->owns_lock());
+        return const_cast<T &>(this->mValue);
+    }
+};
+
+template <typename SV>
+struct SynchronizedValueUniqueLockPtr
+{
+    using type = UniqueLockPtr<typename SV::value_type, typename SV::mutex_type>;
+};
+
+template <typename SV>
+struct SynchronizedValueUniqueLockPtr<const SV>
+{
+    using type = ConstUniqueLockPtr<typename SV::value_type, typename SV::mutex_type>;
+};
+
+template <typename T, typename Lockable = std::mutex>
+class SynchronizedValue
+{
+  public:
+    using value_type = T;
+    using mutex_type = Lockable;
+
+    SynchronizedValue() noexcept(std::is_nothrow_default_constructible<T>::value) : mValue() {}
+
+    SynchronizedValue(const T &other) noexcept(std::is_nothrow_copy_constructible<T>::value)
+        : mValue(other)
+    {}
+
+    SynchronizedValue(T &&other) noexcept(std::is_nothrow_move_constructible<T>::value)
+        : mValue(std::move(other))
+    {}
+
+    template <typename... Args>
+    SynchronizedValue(Args &&... args) noexcept(noexcept(T(std::forward<Args>(args)...)))
+        : mValue(std::forward<Args>(args)...)
+    {}
+
+    SynchronizedValue(const SynchronizedValue &other)
+    {
+        std::lock_guard<Lockable> lock(other.mMutex);
+        mValue = other.mValue;
+    }
+
+    SynchronizedValue(SynchronizedValue &&other)
+    {
+        std::lock_guard<Lockable> lock(other.mMutex);
+        mValue = std::move(other.mValue);
+    }
+
+    SynchronizedValue &operator=(const SynchronizedValue &other)
+    {
+        if (&other != this)
+        {
+            std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+            std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+            std::lock(lock1, lock2);
+            mValue = other.mValue;
+        }
+        return *this;
+    }
+
+    SynchronizedValue &operator=(SynchronizedValue &&other)
+    {
+        if (&other != this)
+        {
+            std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+            std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+            std::lock(lock1, lock2);
+            mValue = std::move(other.mValue);
+        }
+        return *this;
+    }
+
+    SynchronizedValue &operator=(const T &value)
+    {
+        {
+            std::lock_guard<Lockable> lock(mMutex);
+            mValue = value;
+        }
+        return *this;
+    }
+
+    SynchronizedValue &operator=(T &&value)
+    {
+        {
+            std::lock_guard<Lockable> lock(mMutex);
+            mValue = std::move(value);
+        }
+        return *this;
+    }
+
+    T get() const
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        return mValue;
+    }
+
+    explicit operator T() const { return get(); }
+
+    void swap(SynchronizedValue &other)
+    {
+        if (this == &other)
+        {
+            return;
+        }
+        std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+        std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+        std::lock(lock1, lock2);
+        std::swap(mValue, other.mValue);
+    }
+
+    void swap(T &other)
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        std::swap(mValue, other);
+    }
+
+    StrictLockPtr<T, Lockable> operator->() { return StrictLockPtr<T, Lockable>(mValue, mMutex); }
+    ConstStrictLockPtr<T, Lockable> operator->() const
+    {
+        return ConstStrictLockPtr<T, Lockable>(mValue, mMutex);
+    }
+
+    StrictLockPtr<T, Lockable> synchronize() { return StrictLockPtr<T, Lockable>(mValue, mMutex); }
+    ConstStrictLockPtr<T, Lockable> synchronize() const
+    {
+        return ConstStrictLockPtr<T, Lockable>(mValue, mMutex);
+    }
+
+    UniqueLockPtr<T, Lockable> unique_synchronize()
+    {
+        return UniqueLockPtr<T, Lockable>(mValue, mMutex);
+    }
+    ConstUniqueLockPtr<T, Lockable> unique_synchronize() const
+    {
+        return ConstUniqueLockPtr<T, Lockable>(mValue, mMutex);
+    }
+
+    UniqueLockPtr<T, Lockable> defer_synchronize() noexcept
+    {
+        return UniqueLockPtr<T, Lockable>(mValue, mMutex, std::defer_lock);
+    }
+    ConstUniqueLockPtr<T, Lockable> defer_synchronize() const noexcept
+    {
+        return ConstUniqueLockPtr<T, Lockable>(mValue, mMutex, std::defer_lock);
+    }
+
+    UniqueLockPtr<T, Lockable> try_to_synchronize() noexcept
+    {
+        return UniqueLockPtr<T, Lockable>(mValue, mMutex, std::try_to_lock);
+    }
+    ConstUniqueLockPtr<T, Lockable> try_to_synchronize() const noexcept
+    {
+        return ConstUniqueLockPtr<T, Lockable>(mValue, mMutex, std::try_to_lock);
+    }
+
+    UniqueLockPtr<T, Lockable> adopt_synchronize() noexcept
+    {
+        return UniqueLockPtr<T, Lockable>(mValue, mMutex, std::adopt_lock);
+    }
+    ConstUniqueLockPtr<T, Lockable> adopt_synchronize() const noexcept
+    {
+        return ConstUniqueLockPtr<T, Lockable>(mValue, mMutex, std::adopt_lock);
+    }
+
+    class DerefValue
+    {
+      public:
+        DerefValue(DerefValue &&other) : mLock(std::move(other.mLock)), mValue(other.mValue) {}
+
+        DerefValue(const DerefValue &) = delete;
+        DerefValue &operator=(const DerefValue &) = delete;
+
+        operator T &() { return mValue; }
+
+        DerefValue &operator=(const T &other)
+        {
+            mValue = other;
+            return *this;
+        }
+
+      private:
+        explicit DerefValue(SynchronizedValue &outer) : mLock(outer.mMutex), mValue(outer.mValue) {}
+
+        std::unique_lock<Lockable> mLock;
+        T &mValue;
+
+        friend class SynchronizedValue;
+    };
+
+    class ConstDerefValue
+    {
+      public:
+        ConstDerefValue(ConstDerefValue &&other)
+            : mLock(std::move(other.mLock)), mValue(other.mValue)
+        {}
+
+        ConstDerefValue(const ConstDerefValue &) = delete;
+        ConstDerefValue &operator=(const ConstDerefValue &) = delete;
+
+        operator const T &() { return mValue; }
+
+      private:
+        explicit ConstDerefValue(const SynchronizedValue &outer)
+            : mLock(outer.mMutex), mValue(outer.mValue)
+        {}
+
+        std::unique_lock<Lockable> mLock;
+        const T &mValue;
+
+        friend class SynchronizedValue;
+    };
+
+    DerefValue operator*() { return DerefValue(*this); }
+    ConstDerefValue operator*() const { return ConstDerefValue(*this); }
+
+    template <typename OStream>
+    void save(OStream &os) const
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        os << mValue;
+    }
+
+    template <typename IStream>
+    void load(IStream &is)
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        is >> mValue;
+    }
+
+    bool operator==(const SynchronizedValue &other) const
+    {
+        std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+        std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+        std::lock(lock1, lock2);
+        return mValue == other.mValue;
+    }
+
+    bool operator!=(const SynchronizedValue &other) const
+    {
+        std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+        std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+        std::lock(lock1, lock2);
+        return mValue != other.mValue;
+    }
+
+    bool operator<(const SynchronizedValue &other) const
+    {
+        std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+        std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+        std::lock(lock1, lock2);
+        return mValue < other.mValue;
+    }
+
+    bool operator>(const SynchronizedValue &other) const
+    {
+        std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+        std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+        std::lock(lock1, lock2);
+        return mValue > other.mValue;
+    }
+
+    bool operator<=(const SynchronizedValue &other) const
+    {
+        std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+        std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+        std::lock(lock1, lock2);
+        return mValue <= other.mValue;
+    }
+
+    bool operator>=(const SynchronizedValue &other) const
+    {
+        std::unique_lock<Lockable> lock1(mMutex, std::defer_lock);
+        std::unique_lock<Lockable> lock2(other.mMutex, std::defer_lock);
+        std::lock(lock1, lock2);
+        return mValue >= other.mValue;
+    }
+
+    bool operator==(const T &other) const
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        return mValue == other;
+    }
+
+    bool operator!=(const T &other) const
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        return mValue != other;
+    }
+
+    bool operator<(const T &other) const
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        return mValue < other;
+    }
+
+    bool operator>(const T &other) const
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        return mValue > other;
+    }
+
+    bool operator<=(const T &other) const
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        return mValue <= other;
+    }
+
+    bool operator>=(const T &other) const
+    {
+        std::lock_guard<Lockable> lock(mMutex);
+        return mValue >= other;
+    }
+
+  private:
+    T mValue;
+    mutable Lockable mMutex;
+};
+
+template <typename OStream, typename T, typename L>
+inline OStream &operator<<(OStream &os, SynchronizedValue<T, L> const &sv)
+{
+    sv.save(os);
+    return os;
+}
+
+template <typename IStream, typename T, typename L>
+inline IStream &operator>>(IStream &is, SynchronizedValue<T, L> &sv)
+{
+    sv.load(is);
+    return is;
+}
+
+template <typename T, typename L>
+bool operator==(const T &lhs, const SynchronizedValue<T, L> &rhs)
+{
+    return rhs == lhs;
+}
+
+template <typename T, typename L>
+bool operator!=(const T &lhs, const SynchronizedValue<T, L> &rhs)
+{
+    return rhs != lhs;
+}
+
+template <typename T, typename L>
+bool operator<(const T &lhs, const SynchronizedValue<T, L> &rhs)
+{
+    return rhs < lhs;
+}
+
+template <typename T, typename L>
+bool operator>(const T &lhs, const SynchronizedValue<T, L> &rhs)
+{
+    return rhs > lhs;
+}
+
+template <typename T, typename L>
+bool operator<=(const T &lhs, const SynchronizedValue<T, L> &rhs)
+{
+    return rhs <= lhs;
+}
+
+template <typename T, typename L>
+bool operator>=(const T &lhs, const SynchronizedValue<T, L> &rhs)
+{
+    return rhs >= lhs;
+}
+
+}  // namespace angle
+
+#endif  // COMMON_SYNCHRONIZEDVALUE_H_
diff --git a/gfx/angle/checkout/src/common/aligned_memory.cpp b/gfx/angle/checkout/src/common/aligned_memory.cpp
new file mode 100644
index 0000000000..9798fc0f42
--- /dev/null
+++ b/gfx/angle/checkout/src/common/aligned_memory.cpp
@@ -0,0 +1,64 @@
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// aligned_memory: An aligned memory allocator. Based on Chrome's base/memory/aligned_memory.
+//
+
+#include "common/aligned_memory.h"
+
+#include "common/debug.h"
+#include "common/platform.h"
+
+#if defined(COMPILER_MSVC)
+#    include <malloc.h>
+#else
+#    include <stdlib.h>
+#endif
+
+namespace angle
+{
+
+void *AlignedAlloc(size_t size, size_t alignment)
+{
+    ASSERT(size > 0);
+    ASSERT((alignment & (alignment - 1)) == 0);
+    ASSERT((alignment % sizeof(void *)) == 0);
+    void *ptr = nullptr;
+#if defined(ANGLE_PLATFORM_WINDOWS)
+    ptr = _aligned_malloc(size, alignment);
+// Android technically supports posix_memalign(), but does not expose it in
+// the current version of the library headers used by Chrome.  Luckily,
+// memalign() on Android returns pointers which can safely be used with
+// free(), so we can use it instead.  Issue filed to document this:
+// http://code.google.com/p/android/issues/detail?id=35391
+#elif defined(ANGLE_PLATFORM_ANDROID)
+    ptr = memalign(alignment, size);
+#else
+    if (posix_memalign(&ptr, alignment, size))
+        ptr = nullptr;
+#endif
+    // Since aligned allocations may fail for non-memory related reasons, force a
+    // crash if we encounter a failed allocation.
+    if (!ptr)
+    {
+        ERR() << "If you crashed here, your aligned allocation is incorrect: "
+              << "size=" << size << ", alignment=" << alignment;
+        ASSERT(false);
+    }
+    // Confidence check alignment just to be safe.
+    ASSERT((reinterpret_cast<uintptr_t>(ptr) & (alignment - 1)) == 0);
+    return ptr;
+}
+
+void AlignedFree(void *ptr)
+{
+#if defined(ANGLE_PLATFORM_WINDOWS)
+    _aligned_free(ptr);
+#else
+    free(ptr);
+#endif
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/aligned_memory.h b/gfx/angle/checkout/src/common/aligned_memory.h
new file mode 100644
index 0000000000..dcbb60d1cb
--- /dev/null
+++ b/gfx/angle/checkout/src/common/aligned_memory.h
@@ -0,0 +1,23 @@
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// aligned_memory: An aligned memory allocator. Based on Chrome's base/memory/aligned_memory.
+//
+
+#ifndef COMMON_ALIGNED_MEMORY_H_
+#define COMMON_ALIGNED_MEMORY_H_
+
+#include <cstddef>
+
+namespace angle
+{
+
+// This can be replaced with std::aligned_malloc when we have C++17.
+void *AlignedAlloc(size_t size, size_t alignment);
+void AlignedFree(void *ptr);
+
+}  // namespace angle
+
+#endif  // COMMON_ALIGNED_MEMORY_H_
diff --git a/gfx/angle/checkout/src/common/android_util.cpp b/gfx/angle/checkout/src/common/android_util.cpp
new file mode 100644
index 0000000000..8188da21ef
--- /dev/null
+++ b/gfx/angle/checkout/src/common/android_util.cpp
@@ -0,0 +1,424 @@
+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// android_util.cpp: Utilities for the using the Android platform
+
+#include "common/android_util.h"
+#include "common/debug.h"
+
+#include <cstdint>
+
+#if defined(ANGLE_PLATFORM_ANDROID) && __ANDROID_API__ >= 26
+#    define ANGLE_AHARDWARE_BUFFER_SUPPORT
+// NDK header file for access to Android Hardware Buffers
+#    include <android/hardware_buffer.h>
+#endif
+
+// Taken from cutils/native_handle.h:
+// https://android.googlesource.com/platform/system/core/+/master/libcutils/include/cutils/native_handle.h
+typedef struct native_handle
+{
+    int version; /* sizeof(native_handle_t) */
+    int numFds;  /* number of file-descriptors at &data[0] */
+    int numInts; /* number of ints at &data[numFds] */
+#if defined(__clang__)
+#    pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wzero-length-array"
+#elif defined(_MSC_VER)
+#    pragma warning(push)
+#    pragma warning(disable : 4200)
+#endif
+    int data[0]; /* numFds + numInts ints */
+#if defined(__clang__)
+#    pragma clang diagnostic pop
+#elif defined(_MSC_VER)
+#    pragma warning(pop)
+#endif
+} native_handle_t;
+
+// Taken from nativebase/nativebase.h
+// https://android.googlesource.com/platform/frameworks/native/+/master/libs/nativebase/include/nativebase/nativebase.h
+typedef const native_handle_t *buffer_handle_t;
+
+typedef struct android_native_base_t
+{
+    /* a magic value defined by the actual EGL native type */
+    int magic;
+    /* the sizeof() of the actual EGL native type */
+    int version;
+    void *reserved[4];
+    /* reference-counting interface */
+    void (*incRef)(struct android_native_base_t *base);
+    void (*decRef)(struct android_native_base_t *base);
+} android_native_base_t;
+
+typedef struct ANativeWindowBuffer
+{
+    struct android_native_base_t common;
+    int width;
+    int height;
+    int stride;
+    int format;
+    int usage_deprecated;
+    uintptr_t layerCount;
+    void *reserved[1];
+    const native_handle_t *handle;
+    uint64_t usage;
+    // we needed extra space for storing the 64-bits usage flags
+    // the number of slots to use from reserved_proc depends on the
+    // architecture.
+    void *reserved_proc[8 - (sizeof(uint64_t) / sizeof(void *))];
+} ANativeWindowBuffer_t;
+
+// Taken from android/hardware_buffer.h
+// https://android.googlesource.com/platform/frameworks/native/+/master/libs/nativewindow/include/android/hardware_buffer.h
+
+// AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM,
+// AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM formats were deprecated and re-added explicitly.
+
+// clang-format off
+/**
+ * Buffer pixel formats.
+ */
+enum {
+
+#ifndef ANGLE_AHARDWARE_BUFFER_SUPPORT
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R8G8B8A8_UNORM
+     *   OpenGL ES: GL_RGBA8
+     */
+    AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM           = 1,
+
+    /**
+     * 32 bits per pixel, 8 bits per channel format where alpha values are
+     * ignored (always opaque).
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R8G8B8A8_UNORM
+     *   OpenGL ES: GL_RGB8
+     */
+    AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM           = 2,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R8G8B8_UNORM
+     *   OpenGL ES: GL_RGB8
+     */
+    AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM             = 3,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R5G6B5_UNORM_PACK16
+     *   OpenGL ES: GL_RGB565
+     */
+    AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM             = 4,
+#endif  // ANGLE_AHARDWARE_BUFFER_SUPPORT
+
+    AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM           = 5,
+    AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM           = 6,
+    AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM           = 7,
+
+#ifndef ANGLE_AHARDWARE_BUFFER_SUPPORT
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R16G16B16A16_SFLOAT
+     *   OpenGL ES: GL_RGBA16F
+     */
+    AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT       = 0x16,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_A2B10G10R10_UNORM_PACK32
+     *   OpenGL ES: GL_RGB10_A2
+     */
+    AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM        = 0x2b,
+
+    /**
+     * An opaque binary blob format that must have height 1, with width equal to
+     * the buffer size in bytes.
+     */
+    AHARDWAREBUFFER_FORMAT_BLOB                     = 0x21,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_D16_UNORM
+     *   OpenGL ES: GL_DEPTH_COMPONENT16
+     */
+    AHARDWAREBUFFER_FORMAT_D16_UNORM                = 0x30,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_X8_D24_UNORM_PACK32
+     *   OpenGL ES: GL_DEPTH_COMPONENT24
+     */
+    AHARDWAREBUFFER_FORMAT_D24_UNORM                = 0x31,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_D24_UNORM_S8_UINT
+     *   OpenGL ES: GL_DEPTH24_STENCIL8
+     */
+    AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT        = 0x32,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_D32_SFLOAT
+     *   OpenGL ES: GL_DEPTH_COMPONENT32F
+     */
+    AHARDWAREBUFFER_FORMAT_D32_FLOAT                = 0x33,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_D32_SFLOAT_S8_UINT
+     *   OpenGL ES: GL_DEPTH32F_STENCIL8
+     */
+    AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT        = 0x34,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_S8_UINT
+     *   OpenGL ES: GL_STENCIL_INDEX8
+     */
+    AHARDWAREBUFFER_FORMAT_S8_UINT                  = 0x35,
+
+    /**
+     * YUV 420 888 format.
+     * Must have an even width and height. Can be accessed in OpenGL
+     * shaders through an external sampler. Does not support mip-maps
+     * cube-maps or multi-layered textures.
+     */
+    AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_420             = 0x23,
+
+#endif  // ANGLE_AHARDWARE_BUFFER_SUPPORT
+
+    AHARDWAREBUFFER_FORMAT_YV12                     = 0x32315659,
+    AHARDWAREBUFFER_FORMAT_IMPLEMENTATION_DEFINED   = 0x22,
+};
+// clang-format on
+
+namespace
+{
+
+// In the Android system:
+// - AHardwareBuffer is essentially a typedef of GraphicBuffer. Conversion functions simply
+// reinterpret_cast.
+// - GraphicBuffer inherits from two base classes, ANativeWindowBuffer and RefBase.
+//
+// GraphicBuffer implements a getter for ANativeWindowBuffer (getNativeBuffer) by static_casting
+// itself to its base class ANativeWindowBuffer. The offset of the ANativeWindowBuffer pointer
+// from the GraphicBuffer pointer is 16 bytes. This is likely due to two pointers: The vtable of
+// GraphicBuffer and the one pointer member of the RefBase class.
+//
+// This is not future proof at all. We need to look into getting utilities added to Android to
+// perform this cast for us.
+constexpr int kAHardwareBufferToANativeWindowBufferOffset = static_cast<int>(sizeof(void *)) * 2;
+
+template <typename T1, typename T2>
+T1 *OffsetPointer(T2 *ptr, int bytes)
+{
+    return reinterpret_cast<T1 *>(reinterpret_cast<intptr_t>(ptr) + bytes);
+}
+
+GLenum GetPixelFormatInfo(int pixelFormat, bool *isYUV)
+{
+    *isYUV = false;
+    switch (pixelFormat)
+    {
+        case AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM:
+            return GL_RGBA8;
+        case AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM:
+            return GL_RGB8;
+        case AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM:
+            return GL_RGB8;
+        case AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM:
+            return GL_RGB565;
+        case AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM:
+            return GL_BGRA8_EXT;
+        case AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM:
+            return GL_RGB5_A1;
+        case AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM:
+            return GL_RGBA4;
+        case AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT:
+            return GL_RGBA16F;
+        case AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM:
+            return GL_RGB10_A2;
+        case AHARDWAREBUFFER_FORMAT_BLOB:
+            return GL_NONE;
+        case AHARDWAREBUFFER_FORMAT_D16_UNORM:
+            return GL_DEPTH_COMPONENT16;
+        case AHARDWAREBUFFER_FORMAT_D24_UNORM:
+            return GL_DEPTH_COMPONENT24;
+        case AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT:
+            return GL_DEPTH24_STENCIL8;
+        case AHARDWAREBUFFER_FORMAT_D32_FLOAT:
+            return GL_DEPTH_COMPONENT32F;
+        case AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT:
+            return GL_DEPTH32F_STENCIL8;
+        case AHARDWAREBUFFER_FORMAT_S8_UINT:
+            return GL_STENCIL_INDEX8;
+        case AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_420:
+        case AHARDWAREBUFFER_FORMAT_YV12:
+        case AHARDWAREBUFFER_FORMAT_IMPLEMENTATION_DEFINED:
+            *isYUV = true;
+            return GL_RGB8;
+        default:
+            // Treat unknown formats as RGB. They are vendor-specific YUV formats that would sample
+            // as RGB.
+            *isYUV = true;
+            return GL_RGB8;
+    }
+}
+
+}  // anonymous namespace
+
+namespace angle
+{
+
+namespace android
+{
+
+ANativeWindowBuffer *ClientBufferToANativeWindowBuffer(EGLClientBuffer clientBuffer)
+{
+    return reinterpret_cast<ANativeWindowBuffer *>(clientBuffer);
+}
+
+uint64_t GetAHBUsage(int eglNativeBufferUsage)
+{
+    uint64_t ahbUsage = 0;
+#if defined(ANGLE_AHARDWARE_BUFFER_SUPPORT)
+    if (eglNativeBufferUsage & EGL_NATIVE_BUFFER_USAGE_PROTECTED_BIT_ANDROID)
+    {
+        ahbUsage |= AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT;
+    }
+    if (eglNativeBufferUsage & EGL_NATIVE_BUFFER_USAGE_RENDERBUFFER_BIT_ANDROID)
+    {
+        ahbUsage |= AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER;
+    }
+    if (eglNativeBufferUsage & EGL_NATIVE_BUFFER_USAGE_TEXTURE_BIT_ANDROID)
+    {
+        ahbUsage |= AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE;
+    }
+#endif  // ANGLE_AHARDWARE_BUFFER_SUPPORT
+    return ahbUsage;
+}
+
+EGLClientBuffer CreateEGLClientBufferFromAHardwareBuffer(int width,
+                                                         int height,
+                                                         int depth,
+                                                         int androidFormat,
+                                                         int usage)
+{
+#if defined(ANGLE_AHARDWARE_BUFFER_SUPPORT)
+
+    // The height and width are number of pixels of size format
+    AHardwareBuffer_Desc aHardwareBufferDescription = {};
+    aHardwareBufferDescription.width                = static_cast<uint32_t>(width);
+    aHardwareBufferDescription.height               = static_cast<uint32_t>(height);
+    aHardwareBufferDescription.layers               = static_cast<uint32_t>(depth);
+    aHardwareBufferDescription.format               = androidFormat;
+    aHardwareBufferDescription.usage                = GetAHBUsage(usage);
+
+    // Allocate memory from Android Hardware Buffer
+    AHardwareBuffer *aHardwareBuffer = nullptr;
+    int res = AHardwareBuffer_allocate(&aHardwareBufferDescription, &aHardwareBuffer);
+    if (res != 0)
+    {
+        return nullptr;
+    }
+
+    return AHardwareBufferToClientBuffer(aHardwareBuffer);
+#else
+    return nullptr;
+#endif  // ANGLE_AHARDWARE_BUFFER_SUPPORT
+}
+
+void GetANativeWindowBufferProperties(const ANativeWindowBuffer *buffer,
+                                      int *width,
+                                      int *height,
+                                      int *depth,
+                                      int *pixelFormat,
+                                      uint64_t *usage)
+{
+    *width       = buffer->width;
+    *height      = buffer->height;
+    *depth       = static_cast<int>(buffer->layerCount);
+    *height      = buffer->height;
+    *pixelFormat = buffer->format;
+    *usage       = buffer->usage;
+}
+
+GLenum NativePixelFormatToGLInternalFormat(int pixelFormat)
+{
+    bool isYuv = false;
+    return GetPixelFormatInfo(pixelFormat, &isYuv);
+}
+
+int GLInternalFormatToNativePixelFormat(GLenum internalFormat)
+{
+    switch (internalFormat)
+    {
+        case GL_RGBA8:
+            return AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM;
+        case GL_RGB8:
+            return AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM;
+        case GL_RGB565:
+            return AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM;
+        case GL_BGRA8_EXT:
+            return AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM;
+        case GL_RGB5_A1:
+            return AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM;
+        case GL_RGBA4:
+            return AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM;
+        case GL_RGBA16F:
+            return AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT;
+        case GL_RGB10_A2:
+            return AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM;
+        case GL_NONE:
+            return AHARDWAREBUFFER_FORMAT_BLOB;
+        case GL_DEPTH_COMPONENT16:
+            return AHARDWAREBUFFER_FORMAT_D16_UNORM;
+        case GL_DEPTH_COMPONENT24:
+            return AHARDWAREBUFFER_FORMAT_D24_UNORM;
+        case GL_DEPTH24_STENCIL8:
+            return AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT;
+        case GL_DEPTH_COMPONENT32F:
+            return AHARDWAREBUFFER_FORMAT_D32_FLOAT;
+        case GL_DEPTH32F_STENCIL8:
+            return AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT;
+        case GL_STENCIL_INDEX8:
+            return AHARDWAREBUFFER_FORMAT_S8_UINT;
+        default:
+            WARN() << "Unknown internalFormat: " << internalFormat << ". Treating as 0";
+            return 0;
+    }
+}
+
+bool NativePixelFormatIsYUV(int pixelFormat)
+{
+    bool isYuv = false;
+    GetPixelFormatInfo(pixelFormat, &isYuv);
+    return isYuv;
+}
+
+AHardwareBuffer *ANativeWindowBufferToAHardwareBuffer(ANativeWindowBuffer *windowBuffer)
+{
+    return OffsetPointer<AHardwareBuffer>(windowBuffer,
+                                          -kAHardwareBufferToANativeWindowBufferOffset);
+}
+
+EGLClientBuffer AHardwareBufferToClientBuffer(const AHardwareBuffer *hardwareBuffer)
+{
+    return OffsetPointer<EGLClientBuffer>(hardwareBuffer,
+                                          kAHardwareBufferToANativeWindowBufferOffset);
+}
+
+AHardwareBuffer *ClientBufferToAHardwareBuffer(EGLClientBuffer clientBuffer)
+{
+    return OffsetPointer<AHardwareBuffer>(clientBuffer,
+                                          -kAHardwareBufferToANativeWindowBufferOffset);
+}
+}  // namespace android
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/android_util.h b/gfx/angle/checkout/src/common/android_util.h
new file mode 100644
index 0000000000..eee60ba244
--- /dev/null
+++ b/gfx/angle/checkout/src/common/android_util.h
@@ -0,0 +1,59 @@
+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// android_util.h: Utilities for the using the Android platform
+
+#ifndef COMMON_ANDROIDUTIL_H_
+#define COMMON_ANDROIDUTIL_H_
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <stdint.h>
+#include <array>
+
+#include "angle_gl.h"
+
+struct ANativeWindowBuffer;
+struct AHardwareBuffer;
+
+namespace angle
+{
+
+namespace android
+{
+
+constexpr std::array<GLenum, 3> kSupportedSizedInternalFormats = {GL_RGBA8, GL_RGB8, GL_RGB565};
+
+ANativeWindowBuffer *ClientBufferToANativeWindowBuffer(EGLClientBuffer clientBuffer);
+EGLClientBuffer AHardwareBufferToClientBuffer(const AHardwareBuffer *hardwareBuffer);
+AHardwareBuffer *ClientBufferToAHardwareBuffer(EGLClientBuffer clientBuffer);
+
+EGLClientBuffer CreateEGLClientBufferFromAHardwareBuffer(int width,
+                                                         int height,
+                                                         int depth,
+                                                         int androidFormat,
+                                                         int usage);
+
+void GetANativeWindowBufferProperties(const ANativeWindowBuffer *buffer,
+                                      int *width,
+                                      int *height,
+                                      int *depth,
+                                      int *pixelFormat,
+                                      uint64_t *usage);
+GLenum NativePixelFormatToGLInternalFormat(int pixelFormat);
+int GLInternalFormatToNativePixelFormat(GLenum internalFormat);
+
+bool NativePixelFormatIsYUV(int pixelFormat);
+
+AHardwareBuffer *ANativeWindowBufferToAHardwareBuffer(ANativeWindowBuffer *windowBuffer);
+
+uint64_t GetAHBUsage(int eglNativeBufferUsage);
+
+}  // namespace android
+}  // namespace angle
+
+#endif  // COMMON_ANDROIDUTIL_H_
diff --git a/gfx/angle/checkout/src/common/angle_version.h b/gfx/angle/checkout/src/common/angle_version.h
new file mode 100644
index 0000000000..d9d7e8929d
--- /dev/null
+++ b/gfx/angle/checkout/src/common/angle_version.h
@@ -0,0 +1,28 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// angle_version.h: ANGLE version constants. Generated from git commands.
+
+#ifndef COMMON_ANGLE_VERSION_H_
+#define COMMON_ANGLE_VERSION_H_
+
+#include "angle_commit.h"
+
+#define ANGLE_MAJOR_VERSION 2
+#define ANGLE_MINOR_VERSION 1
+
+#ifndef ANGLE_REVISION
+#    define ANGLE_REVISION ANGLE_COMMIT_POSITION
+#endif
+
+#define ANGLE_STRINGIFY(x) #x
+#define ANGLE_MACRO_STRINGIFY(x) ANGLE_STRINGIFY(x)
+
+#define ANGLE_VERSION_STRING                                                  \
+    ANGLE_MACRO_STRINGIFY(ANGLE_MAJOR_VERSION)                                \
+    "." ANGLE_MACRO_STRINGIFY(ANGLE_MINOR_VERSION) "." ANGLE_MACRO_STRINGIFY( \
+        ANGLE_REVISION) " git hash: " ANGLE_COMMIT_HASH
+
+#endif  // COMMON_ANGLE_VERSION_H_
diff --git a/gfx/angle/checkout/src/common/angle_version_info.cpp b/gfx/angle/checkout/src/common/angle_version_info.cpp
new file mode 100644
index 0000000000..963741a456
--- /dev/null
+++ b/gfx/angle/checkout/src/common/angle_version_info.cpp
@@ -0,0 +1,40 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// angle_version_info.cpp: ANGLE version queries.
+
+#include "common/angle_version.h"
+
+namespace angle
+{
+int GetANGLERevision()
+{
+    return ANGLE_REVISION;
+}
+
+const char *GetANGLEVersionString()
+{
+    return ANGLE_VERSION_STRING;
+}
+
+const char *GetANGLECommitHash()
+{
+    return ANGLE_COMMIT_HASH;
+}
+
+int GetANGLECommitHashSize()
+{
+    return ANGLE_COMMIT_HASH_SIZE;
+}
+
+bool GetANGLEHasBinaryLoading()
+{
+#ifdef ANGLE_HAS_BINARY_LOADING
+    return true;
+#else
+    return false;
+#endif  //  #ifndef ANGLE_HAS_BINARY_LOADING
+}
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/angle_version_info.h b/gfx/angle/checkout/src/common/angle_version_info.h
new file mode 100644
index 0000000000..1d5392068c
--- /dev/null
+++ b/gfx/angle/checkout/src/common/angle_version_info.h
@@ -0,0 +1,20 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// angle_version_info.h: ANGLE version queries.
+
+#ifndef COMMON_VERSION_INFO_H_
+#define COMMON_VERSION_INFO_H_
+
+namespace angle
+{
+int GetANGLERevision();
+const char *GetANGLEVersionString();
+const char *GetANGLECommitHash();
+int GetANGLECommitHashSize();
+bool GetANGLEHasBinaryLoading();
+}  // namespace angle
+
+#endif  // COMMON_VERSION_INFO_H_
diff --git a/gfx/angle/checkout/src/common/angleutils.cpp b/gfx/angle/checkout/src/common/angleutils.cpp
new file mode 100644
index 0000000000..2b69f66d74
--- /dev/null
+++ b/gfx/angle/checkout/src/common/angleutils.cpp
@@ -0,0 +1,156 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "common/angleutils.h"
+#include "common/debug.h"
+
+#include <stdio.h>
+
+#include <limits>
+#include <vector>
+
+namespace angle
+{
+// dirtyPointer is a special value that will make the comparison with any valid pointer fail and
+// force the renderer to re-apply the state.
+const uintptr_t DirtyPointer = std::numeric_limits<uintptr_t>::max();
+
+SaveFileHelper::SaveFileHelper(const std::string &filePathIn)
+    : mOfs(filePathIn, std::ios::binary | std::ios::out), mFilePath(filePathIn)
+{
+    if (!mOfs.is_open())
+    {
+        FATAL() << "Could not open " << filePathIn;
+    }
+}
+
+SaveFileHelper::~SaveFileHelper()
+{
+    printf("Saved '%s'.\n", mFilePath.c_str());
+}
+
+void SaveFileHelper::checkError()
+{
+    if (mOfs.bad())
+    {
+        FATAL() << "Error writing to " << mFilePath;
+    }
+}
+
+void SaveFileHelper::write(const uint8_t *data, size_t size)
+{
+    mOfs.write(reinterpret_cast<const char *>(data), size);
+}
+
+// AMD_performance_monitor helpers.
+
+PerfMonitorCounter::PerfMonitorCounter() = default;
+
+PerfMonitorCounter::~PerfMonitorCounter() = default;
+
+PerfMonitorCounterGroup::PerfMonitorCounterGroup() = default;
+
+PerfMonitorCounterGroup::~PerfMonitorCounterGroup() = default;
+
+uint32_t GetPerfMonitorCounterIndex(const PerfMonitorCounters &counters, const std::string &name)
+{
+    for (uint32_t counterIndex = 0; counterIndex < static_cast<uint32_t>(counters.size());
+         ++counterIndex)
+    {
+        if (counters[counterIndex].name == name)
+        {
+            return counterIndex;
+        }
+    }
+
+    return std::numeric_limits<uint32_t>::max();
+}
+
+uint32_t GetPerfMonitorCounterGroupIndex(const PerfMonitorCounterGroups &groups,
+                                         const std::string &name)
+{
+    for (uint32_t groupIndex = 0; groupIndex < static_cast<uint32_t>(groups.size()); ++groupIndex)
+    {
+        if (groups[groupIndex].name == name)
+        {
+            return groupIndex;
+        }
+    }
+
+    return std::numeric_limits<uint32_t>::max();
+}
+
+const PerfMonitorCounter &GetPerfMonitorCounter(const PerfMonitorCounters &counters,
+                                                const std::string &name)
+{
+    return GetPerfMonitorCounter(const_cast<PerfMonitorCounters &>(counters), name);
+}
+
+PerfMonitorCounter &GetPerfMonitorCounter(PerfMonitorCounters &counters, const std::string &name)
+{
+    uint32_t counterIndex = GetPerfMonitorCounterIndex(counters, name);
+    ASSERT(counterIndex < static_cast<uint32_t>(counters.size()));
+    return counters[counterIndex];
+}
+
+const PerfMonitorCounterGroup &GetPerfMonitorCounterGroup(const PerfMonitorCounterGroups &groups,
+                                                          const std::string &name)
+{
+    return GetPerfMonitorCounterGroup(const_cast<PerfMonitorCounterGroups &>(groups), name);
+}
+
+PerfMonitorCounterGroup &GetPerfMonitorCounterGroup(PerfMonitorCounterGroups &groups,
+                                                    const std::string &name)
+{
+    uint32_t groupIndex = GetPerfMonitorCounterGroupIndex(groups, name);
+    ASSERT(groupIndex < static_cast<uint32_t>(groups.size()));
+    return groups[groupIndex];
+}
+}  // namespace angle
+
+std::string ArrayString(unsigned int i)
+{
+    // We assume that UINT_MAX and GL_INVALID_INDEX are equal.
+    ASSERT(i != UINT_MAX);
+
+    std::stringstream strstr;
+    strstr << "[";
+    strstr << i;
+    strstr << "]";
+    return strstr.str();
+}
+
+std::string ArrayIndexString(const std::vector<unsigned int> &indices)
+{
+    std::stringstream strstr;
+
+    for (auto indicesIt = indices.rbegin(); indicesIt != indices.rend(); ++indicesIt)
+    {
+        // We assume that UINT_MAX and GL_INVALID_INDEX are equal.
+        ASSERT(*indicesIt != UINT_MAX);
+        strstr << "[";
+        strstr << (*indicesIt);
+        strstr << "]";
+    }
+
+    return strstr.str();
+}
+
+size_t FormatStringIntoVector(const char *fmt, va_list vararg, std::vector<char> &outBuffer)
+{
+    va_list varargCopy;
+    va_copy(varargCopy, vararg);
+
+    int len = vsnprintf(nullptr, 0, fmt, vararg);
+    ASSERT(len >= 0);
+
+    outBuffer.resize(len + 1, 0);
+
+    len = vsnprintf(outBuffer.data(), outBuffer.size(), fmt, varargCopy);
+    va_end(varargCopy);
+    ASSERT(len >= 0);
+    return static_cast<size_t>(len);
+}
diff --git a/gfx/angle/checkout/src/common/angleutils.h b/gfx/angle/checkout/src/common/angleutils.h
new file mode 100644
index 0000000000..bcbcabc782
--- /dev/null
+++ b/gfx/angle/checkout/src/common/angleutils.h
@@ -0,0 +1,601 @@
+//
+// Copyright 2002 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// angleutils.h: Common ANGLE utilities.
+
+#ifndef COMMON_ANGLEUTILS_H_
+#define COMMON_ANGLEUTILS_H_
+
+#include "common/platform.h"
+
+#if defined(ANGLE_USE_ABSEIL)
+#    include "absl/container/flat_hash_map.h"
+#    include "absl/container/flat_hash_set.h"
+#endif  // defined(ANGLE_USE_ABSEIL)
+
+#if defined(ANGLE_WITH_LSAN)
+#    include <sanitizer/lsan_interface.h>
+#endif  // defined(ANGLE_WITH_LSAN)
+
+#include <climits>
+#include <cstdarg>
+#include <cstddef>
+#include <fstream>
+#include <mutex>
+#include <set>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+// A helper class to disallow copy and assignment operators
+namespace angle
+{
+
+#if defined(ANGLE_ENABLE_D3D9) || defined(ANGLE_ENABLE_D3D11)
+using Microsoft::WRL::ComPtr;
+#endif  // defined(ANGLE_ENABLE_D3D9) || defined(ANGLE_ENABLE_D3D11)
+
+#if defined(ANGLE_USE_ABSEIL)
+template <typename Key, typename T, class Hash = absl::container_internal::hash_default_hash<Key>>
+using HashMap = absl::flat_hash_map<Key, T, Hash>;
+template <typename Key, class Hash = absl::container_internal::hash_default_hash<Key>>
+using HashSet = absl::flat_hash_set<Key, Hash>;
+#else
+template <typename Key, typename T, class Hash = std::hash<Key>>
+using HashMap = std::unordered_map<Key, T, Hash>;
+template <typename Key, class Hash = std::hash<Key>>
+using HashSet = std::unordered_set<Key, Hash>;
+#endif  // defined(ANGLE_USE_ABSEIL)
+
+class NonCopyable
+{
+  protected:
+    constexpr NonCopyable() = default;
+    ~NonCopyable()          = default;
+
+  private:
+    NonCopyable(const NonCopyable &)    = delete;
+    void operator=(const NonCopyable &) = delete;
+};
+
+extern const uintptr_t DirtyPointer;
+
+struct SaveFileHelper
+{
+  public:
+    // We always use ios::binary to avoid inconsistent line endings when captured on Linux vs Win.
+    SaveFileHelper(const std::string &filePathIn);
+    ~SaveFileHelper();
+
+    template <typename T>
+    SaveFileHelper &operator<<(const T &value)
+    {
+        mOfs << value;
+        checkError();
+        return *this;
+    }
+
+    void write(const uint8_t *data, size_t size);
+
+  private:
+    void checkError();
+
+    std::ofstream mOfs;
+    std::string mFilePath;
+};
+
+// AMD_performance_monitor helpers.
+constexpr char kPerfMonitorExtensionName[] = "GL_AMD_performance_monitor";
+
+struct PerfMonitorCounter
+{
+    PerfMonitorCounter();
+    ~PerfMonitorCounter();
+
+    std::string name;
+    uint64_t value;
+};
+using PerfMonitorCounters = std::vector<PerfMonitorCounter>;
+
+struct PerfMonitorCounterGroup
+{
+    PerfMonitorCounterGroup();
+    ~PerfMonitorCounterGroup();
+
+    std::string name;
+    PerfMonitorCounters counters;
+};
+using PerfMonitorCounterGroups = std::vector<PerfMonitorCounterGroup>;
+
+uint32_t GetPerfMonitorCounterIndex(const PerfMonitorCounters &counters, const std::string &name);
+const PerfMonitorCounter &GetPerfMonitorCounter(const PerfMonitorCounters &counters,
+                                                const std::string &name);
+PerfMonitorCounter &GetPerfMonitorCounter(PerfMonitorCounters &counters, const std::string &name);
+uint32_t GetPerfMonitorCounterGroupIndex(const PerfMonitorCounterGroups &groups,
+                                         const std::string &name);
+const PerfMonitorCounterGroup &GetPerfMonitorCounterGroup(const PerfMonitorCounterGroups &groups,
+                                                          const std::string &name);
+PerfMonitorCounterGroup &GetPerfMonitorCounterGroup(PerfMonitorCounterGroups &groups,
+                                                    const std::string &name);
+
+struct PerfMonitorTriplet
+{
+    uint32_t group;
+    uint32_t counter;
+    uint64_t value;
+};
+
+#define ANGLE_VK_PERF_COUNTERS_X(FN)               \
+    FN(commandQueueSubmitCallsTotal)               \
+    FN(commandQueueSubmitCallsPerFrame)            \
+    FN(vkQueueSubmitCallsTotal)                    \
+    FN(vkQueueSubmitCallsPerFrame)                 \
+    FN(renderPasses)                               \
+    FN(writeDescriptorSets)                        \
+    FN(flushedOutsideRenderPassCommandBuffers)     \
+    FN(swapchainResolveInSubpass)                  \
+    FN(swapchainResolveOutsideSubpass)             \
+    FN(resolveImageCommands)                       \
+    FN(colorLoadOpClears)                          \
+    FN(colorLoadOpLoads)                           \
+    FN(colorLoadOpNones)                           \
+    FN(colorStoreOpStores)                         \
+    FN(colorStoreOpNones)                          \
+    FN(colorClearAttachments)                      \
+    FN(depthLoadOpClears)                          \
+    FN(depthLoadOpLoads)                           \
+    FN(depthLoadOpNones)                           \
+    FN(depthStoreOpStores)                         \
+    FN(depthStoreOpNones)                          \
+    FN(depthClearAttachments)                      \
+    FN(stencilLoadOpClears)                        \
+    FN(stencilLoadOpLoads)                         \
+    FN(stencilLoadOpNones)                         \
+    FN(stencilStoreOpStores)                       \
+    FN(stencilStoreOpNones)                        \
+    FN(stencilClearAttachments)                    \
+    FN(colorAttachmentUnresolves)                  \
+    FN(depthAttachmentUnresolves)                  \
+    FN(stencilAttachmentUnresolves)                \
+    FN(colorAttachmentResolves)                    \
+    FN(depthAttachmentResolves)                    \
+    FN(stencilAttachmentResolves)                  \
+    FN(readOnlyDepthStencilRenderPasses)           \
+    FN(pipelineCreationCacheHits)                  \
+    FN(pipelineCreationCacheMisses)                \
+    FN(pipelineCreationTotalCacheHitsDurationNs)   \
+    FN(pipelineCreationTotalCacheMissesDurationNs) \
+    FN(descriptorSetAllocations)                   \
+    FN(descriptorSetCacheTotalSize)                \
+    FN(descriptorSetCacheKeySizeBytes)             \
+    FN(uniformsAndXfbDescriptorSetCacheHits)       \
+    FN(uniformsAndXfbDescriptorSetCacheMisses)     \
+    FN(uniformsAndXfbDescriptorSetCacheTotalSize)  \
+    FN(textureDescriptorSetCacheHits)              \
+    FN(textureDescriptorSetCacheMisses)            \
+    FN(textureDescriptorSetCacheTotalSize)         \
+    FN(shaderResourcesDescriptorSetCacheHits)      \
+    FN(mutableTexturesUploaded)                    \
+    FN(shaderResourcesDescriptorSetCacheMisses)    \
+    FN(shaderResourcesDescriptorSetCacheTotalSize) \
+    FN(buffersGhosted)                             \
+    FN(vertexArraySyncStateCalls)                  \
+    FN(allocateNewBufferBlockCalls)                \
+    FN(dynamicBufferAllocations)                   \
+    FN(framebufferCacheSize)
+
+#define ANGLE_DECLARE_PERF_COUNTER(COUNTER) uint64_t COUNTER;
+
+struct VulkanPerfCounters
+{
+    ANGLE_VK_PERF_COUNTERS_X(ANGLE_DECLARE_PERF_COUNTER)
+};
+
+#undef ANGLE_DECLARE_PERF_COUNTER
+
+}  // namespace angle
+
+template <typename T, size_t N>
+constexpr inline size_t ArraySize(T (&)[N])
+{
+    return N;
+}
+
+template <typename T>
+class WrappedArray final : angle::NonCopyable
+{
+  public:
+    template <size_t N>
+    constexpr WrappedArray(const T (&data)[N]) : mArray(&data[0]), mSize(N)
+    {}
+
+    constexpr WrappedArray() : mArray(nullptr), mSize(0) {}
+    constexpr WrappedArray(const T *data, size_t size) : mArray(data), mSize(size) {}
+
+    WrappedArray(WrappedArray &&other) : WrappedArray()
+    {
+        std::swap(mArray, other.mArray);
+        std::swap(mSize, other.mSize);
+    }
+
+    ~WrappedArray() {}
+
+    constexpr const T *get() const { return mArray; }
+    constexpr size_t size() const { return mSize; }
+
+  private:
+    const T *mArray;
+    size_t mSize;
+};
+
+template <typename T, unsigned int N>
+void SafeRelease(T (&resourceBlock)[N])
+{
+    for (unsigned int i = 0; i < N; i++)
+    {
+        SafeRelease(resourceBlock[i]);
+    }
+}
+
+template <typename T>
+void SafeRelease(T &resource)
+{
+    if (resource)
+    {
+        resource->Release();
+        resource = nullptr;
+    }
+}
+
+template <typename T>
+void SafeDelete(T *&resource)
+{
+    delete resource;
+    resource = nullptr;
+}
+
+template <typename T>
+void SafeDeleteContainer(T &resource)
+{
+    for (auto &element : resource)
+    {
+        SafeDelete(element);
+    }
+    resource.clear();
+}
+
+template <typename T>
+void SafeDeleteArray(T *&resource)
+{
+    delete[] resource;
+    resource = nullptr;
+}
+
+// Provide a less-than function for comparing structs
+// Note: struct memory must be initialized to zero, because of packing gaps
+template <typename T>
+inline bool StructLessThan(const T &a, const T &b)
+{
+    return (memcmp(&a, &b, sizeof(T)) < 0);
+}
+
+// Provide a less-than function for comparing structs
+// Note: struct memory must be initialized to zero, because of packing gaps
+template <typename T>
+inline bool StructEquals(const T &a, const T &b)
+{
+    return (memcmp(&a, &b, sizeof(T)) == 0);
+}
+
+template <typename T>
+inline void StructZero(T *obj)
+{
+    memset(obj, 0, sizeof(T));
+}
+
+template <typename T>
+inline bool IsMaskFlagSet(T mask, T flag)
+{
+    // Handles multibit flags as well
+    return (mask & flag) == flag;
+}
+
+inline const char *MakeStaticString(const std::string &str)
+{
+    // On the heap so that no destructor runs on application exit.
+    static std::set<std::string> *strings = new std::set<std::string>;
+    std::set<std::string>::iterator it    = strings->find(str);
+    if (it != strings->end())
+    {
+        return it->c_str();
+    }
+
+    return strings->insert(str).first->c_str();
+}
+
+std::string ArrayString(unsigned int i);
+
+// Indices are stored in vectors with the outermost index in the back. In the output of the function
+// the indices are reversed.
+std::string ArrayIndexString(const std::vector<unsigned int> &indices);
+
+inline std::string Str(int i)
+{
+    std::stringstream strstr;
+    strstr << i;
+    return strstr.str();
+}
+
+template <typename T>
+std::string ToString(const T &value)
+{
+    std::ostringstream o;
+    o << value;
+    return o.str();
+}
+
+inline bool IsLittleEndian()
+{
+    constexpr uint32_t kEndiannessTest = 1;
+    const bool isLittleEndian          = *reinterpret_cast<const uint8_t *>(&kEndiannessTest) == 1;
+    return isLittleEndian;
+}
+
+// Helper class to use a mutex with the control of boolean.
+class ConditionalMutex final : angle::NonCopyable
+{
+  public:
+    ConditionalMutex() : mUseMutex(true) {}
+    void init(bool useMutex) { mUseMutex = useMutex; }
+    void lock()
+    {
+        if (mUseMutex)
+        {
+            mMutex.lock();
+        }
+    }
+    void unlock()
+    {
+        if (mUseMutex)
+        {
+            mMutex.unlock();
+        }
+    }
+
+  private:
+    std::mutex mMutex;
+    bool mUseMutex;
+};
+
+// snprintf is not defined with MSVC prior to to msvc14
+#if defined(_MSC_VER) && _MSC_VER < 1900
+#    define snprintf _snprintf
+#endif
+
+#define GL_A1RGB5_ANGLEX 0x6AC5
+#define GL_BGRX8_ANGLEX 0x6ABA
+#define GL_BGR565_ANGLEX 0x6ABB
+#define GL_BGRA4_ANGLEX 0x6ABC
+#define GL_BGR5_A1_ANGLEX 0x6ABD
+#define GL_INT_64_ANGLEX 0x6ABE
+#define GL_UINT_64_ANGLEX 0x6ABF
+#define GL_BGRA8_SRGB_ANGLEX 0x6AC0
+#define GL_BGR10_A2_ANGLEX 0x6AF9
+
+// These are fake formats used to fit typeless D3D textures that can be bound to EGL pbuffers into
+// the format system (for extension EGL_ANGLE_d3d_texture_client_buffer):
+#define GL_RGBA8_TYPELESS_ANGLEX 0x6AC1
+#define GL_RGBA8_TYPELESS_SRGB_ANGLEX 0x6AC2
+#define GL_BGRA8_TYPELESS_ANGLEX 0x6AC3
+#define GL_BGRA8_TYPELESS_SRGB_ANGLEX 0x6AC4
+
+#define GL_R8_SSCALED_ANGLEX 0x6AC6
+#define GL_RG8_SSCALED_ANGLEX 0x6AC7
+#define GL_RGB8_SSCALED_ANGLEX 0x6AC8
+#define GL_RGBA8_SSCALED_ANGLEX 0x6AC9
+#define GL_R8_USCALED_ANGLEX 0x6ACA
+#define GL_RG8_USCALED_ANGLEX 0x6ACB
+#define GL_RGB8_USCALED_ANGLEX 0x6ACC
+#define GL_RGBA8_USCALED_ANGLEX 0x6ACD
+
+#define GL_R16_SSCALED_ANGLEX 0x6ACE
+#define GL_RG16_SSCALED_ANGLEX 0x6ACF
+#define GL_RGB16_SSCALED_ANGLEX 0x6AD0
+#define GL_RGBA16_SSCALED_ANGLEX 0x6AD1
+#define GL_R16_USCALED_ANGLEX 0x6AD2
+#define GL_RG16_USCALED_ANGLEX 0x6AD3
+#define GL_RGB16_USCALED_ANGLEX 0x6AD4
+#define GL_RGBA16_USCALED_ANGLEX 0x6AD5
+
+#define GL_R32_SSCALED_ANGLEX 0x6AD6
+#define GL_RG32_SSCALED_ANGLEX 0x6AD7
+#define GL_RGB32_SSCALED_ANGLEX 0x6AD8
+#define GL_RGBA32_SSCALED_ANGLEX 0x6AD9
+#define GL_R32_USCALED_ANGLEX 0x6ADA
+#define GL_RG32_USCALED_ANGLEX 0x6ADB
+#define GL_RGB32_USCALED_ANGLEX 0x6ADC
+#define GL_RGBA32_USCALED_ANGLEX 0x6ADD
+
+#define GL_R32_SNORM_ANGLEX 0x6ADE
+#define GL_RG32_SNORM_ANGLEX 0x6ADF
+#define GL_RGB32_SNORM_ANGLEX 0x6AE0
+#define GL_RGBA32_SNORM_ANGLEX 0x6AE1
+#define GL_R32_UNORM_ANGLEX 0x6AE2
+#define GL_RG32_UNORM_ANGLEX 0x6AE3
+#define GL_RGB32_UNORM_ANGLEX 0x6AE4
+#define GL_RGBA32_UNORM_ANGLEX 0x6AE5
+
+#define GL_R32_FIXED_ANGLEX 0x6AE6
+#define GL_RG32_FIXED_ANGLEX 0x6AE7
+#define GL_RGB32_FIXED_ANGLEX 0x6AE8
+#define GL_RGBA32_FIXED_ANGLEX 0x6AE9
+
+#define GL_RGB10_A2_SINT_ANGLEX 0x6AEA
+#define GL_RGB10_A2_SNORM_ANGLEX 0x6AEB
+#define GL_RGB10_A2_SSCALED_ANGLEX 0x6AEC
+#define GL_RGB10_A2_USCALED_ANGLEX 0x6AED
+
+// EXT_texture_type_2_10_10_10_REV
+#define GL_RGB10_UNORM_ANGLEX 0x6AEE
+
+// These are fake formats for OES_vertex_type_10_10_10_2
+#define GL_A2_RGB10_UNORM_ANGLEX 0x6AEF
+#define GL_A2_RGB10_SNORM_ANGLEX 0x6AF0
+#define GL_A2_RGB10_USCALED_ANGLEX 0x6AF1
+#define GL_A2_RGB10_SSCALED_ANGLEX 0x6AF2
+#define GL_X2_RGB10_UINT_ANGLEX 0x6AF3
+#define GL_X2_RGB10_SINT_ANGLEX 0x6AF4
+#define GL_X2_RGB10_USCALED_ANGLEX 0x6AF5
+#define GL_X2_RGB10_SSCALED_ANGLEX 0x6AF6
+#define GL_X2_RGB10_UNORM_ANGLEX 0x6AF7
+#define GL_X2_RGB10_SNORM_ANGLEX 0x6AF8
+
+#define ANGLE_CHECK_GL_ALLOC(context, result) \
+    ANGLE_CHECK(context, result, "Failed to allocate host memory", GL_OUT_OF_MEMORY)
+
+#define ANGLE_CHECK_GL_MATH(context, result) \
+    ANGLE_CHECK(context, result, "Integer overflow.", GL_INVALID_OPERATION)
+
+#define ANGLE_GL_UNREACHABLE(context) \
+    UNREACHABLE();                    \
+    ANGLE_CHECK(context, false, "Unreachable Code.", GL_INVALID_OPERATION)
+
+#if defined(ANGLE_WITH_LSAN)
+#    define ANGLE_SCOPED_DISABLE_LSAN() __lsan::ScopedDisabler lsanDisabler
+#else
+#    define ANGLE_SCOPED_DISABLE_LSAN()
+#endif
+
+#if defined(ANGLE_WITH_MSAN)
+class MsanScopedDisableInterceptorChecks final : angle::NonCopyable
+{
+  public:
+    MsanScopedDisableInterceptorChecks() { __msan_scoped_disable_interceptor_checks(); }
+    ~MsanScopedDisableInterceptorChecks() { __msan_scoped_enable_interceptor_checks(); }
+};
+#    define ANGLE_SCOPED_DISABLE_MSAN() \
+        MsanScopedDisableInterceptorChecks msanScopedDisableInterceptorChecks
+#else
+#    define ANGLE_SCOPED_DISABLE_MSAN()
+#endif
+
+// The ANGLE_NO_SANITIZE_MEMORY macro suppresses MemorySanitizer checks for
+// use-of-uninitialized-data. It can be used to decorate functions with known
+// false positives.
+#ifdef __clang__
+#    define ANGLE_NO_SANITIZE_MEMORY __attribute__((no_sanitize_memory))
+#else
+#    define ANGLE_NO_SANITIZE_MEMORY
+#endif
+
+// Similar to the above, but for thread sanitization.
+#ifdef __clang__
+#    define ANGLE_NO_SANITIZE_THREAD __attribute__((no_sanitize_thread))
+#else
+#    define ANGLE_NO_SANITIZE_THREAD
+#endif
+
+// The below inlining code lifted from V8.
+#if defined(__clang__) || (defined(__GNUC__) && defined(__has_attribute))
+#    define ANGLE_HAS_ATTRIBUTE_ALWAYS_INLINE (__has_attribute(always_inline))
+#    define ANGLE_HAS___FORCEINLINE 0
+#elif defined(_MSC_VER)
+#    define ANGLE_HAS_ATTRIBUTE_ALWAYS_INLINE 0
+#    define ANGLE_HAS___FORCEINLINE 1
+#else
+#    define ANGLE_HAS_ATTRIBUTE_ALWAYS_INLINE 0
+#    define ANGLE_HAS___FORCEINLINE 0
+#endif
+
+#if defined(NDEBUG) && ANGLE_HAS_ATTRIBUTE_ALWAYS_INLINE
+#    define ANGLE_INLINE inline __attribute__((always_inline))
+#elif defined(NDEBUG) && ANGLE_HAS___FORCEINLINE
+#    define ANGLE_INLINE __forceinline
+#else
+#    define ANGLE_INLINE inline
+#endif
+
+#if defined(__clang__) || (defined(__GNUC__) && defined(__has_attribute))
+#    if __has_attribute(noinline)
+#        define ANGLE_NOINLINE __attribute__((noinline))
+#    else
+#        define ANGLE_NOINLINE
+#    endif
+#elif defined(_MSC_VER)
+#    define ANGLE_NOINLINE __declspec(noinline)
+#else
+#    define ANGLE_NOINLINE
+#endif
+
+#if defined(__clang__) || (defined(__GNUC__) && defined(__has_attribute))
+#    if __has_attribute(format)
+#        define ANGLE_FORMAT_PRINTF(fmt, args) __attribute__((format(__printf__, fmt, args)))
+#    else
+#        define ANGLE_FORMAT_PRINTF(fmt, args)
+#    endif
+#else
+#    define ANGLE_FORMAT_PRINTF(fmt, args)
+#endif
+
+ANGLE_FORMAT_PRINTF(1, 0)
+size_t FormatStringIntoVector(const char *fmt, va_list vararg, std::vector<char> &buffer);
+
+// Format messes up the # inside the macro.
+// clang-format off
+#ifndef ANGLE_STRINGIFY
+#    define ANGLE_STRINGIFY(x) #x
+#endif
+// clang-format on
+
+#ifndef ANGLE_MACRO_STRINGIFY
+#    define ANGLE_MACRO_STRINGIFY(x) ANGLE_STRINGIFY(x)
+#endif
+
+#if __has_cpp_attribute(clang::require_constant_initialization)
+#    define ANGLE_REQUIRE_CONSTANT_INIT [[clang::require_constant_initialization]]
+#else
+#    define ANGLE_REQUIRE_CONSTANT_INIT
+#endif  // __has_cpp_attribute(require_constant_initialization)
+
+// Compiler configs.
+inline bool IsASan()
+{
+#if defined(ANGLE_WITH_ASAN)
+    return true;
+#else
+    return false;
+#endif  // defined(ANGLE_WITH_ASAN)
+}
+
+inline bool IsMSan()
+{
+#if defined(ANGLE_WITH_MSAN)
+    return true;
+#else
+    return false;
+#endif  // defined(ANGLE_WITH_MSAN)
+}
+
+inline bool IsTSan()
+{
+#if defined(ANGLE_WITH_TSAN)
+    return true;
+#else
+    return false;
+#endif  // defined(ANGLE_WITH_TSAN)
+}
+
+inline bool IsUBSan()
+{
+#if defined(ANGLE_WITH_UBSAN)
+    return true;
+#else
+    return false;
+#endif  // defined(ANGLE_WITH_UBSAN)
+}
+#endif  // COMMON_ANGLEUTILS_H_
diff --git a/gfx/angle/checkout/src/common/apple_platform_utils.h b/gfx/angle/checkout/src/common/apple_platform_utils.h
new file mode 100644
index 0000000000..da932a9207
--- /dev/null
+++ b/gfx/angle/checkout/src/common/apple_platform_utils.h
@@ -0,0 +1,90 @@
+//
+// Copyright 2019 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// apple_platform_utils.h: Common utilities for Apple platforms.
+
+#ifndef COMMON_APPLE_PLATFORM_UTILS_H_
+#define COMMON_APPLE_PLATFORM_UTILS_H_
+
+#include "common/platform.h"
+
+// These are macros for substitution of Apple specific directive @available:
+
+// TARGET_OS_MACCATALYST only available in MacSDK 10.15
+
+#if TARGET_OS_MACCATALYST
+// ANGLE_APPLE_AVAILABLE_XCI: check if either of the 3 platforms (OSX/Catalyst/iOS) min verions is
+// available:
+#    define ANGLE_APPLE_AVAILABLE_XCI(macVer, macCatalystVer, iOSVer) \
+        @available(macOS macVer, macCatalyst macCatalystVer, iOS iOSVer, *)
+// ANGLE_APPLE_AVAILABLE_XC: check if either of the 2 platforms (OSX/Catalyst) min verions is
+// available:
+#    define ANGLE_APPLE_AVAILABLE_XC(macVer, macCatalystVer) \
+        @available(macOS macVer, macCatalyst macCatalystVer, *)
+// ANGLE_APPLE_AVAILABLE_CI: check if either of the 2 platforms (Catalyst/iOS) min verions is
+// available:
+#    define ANGLE_APPLE_AVAILABLE_CI(macCatalystVer, iOSVer) \
+        @available(macCatalyst macCatalystVer, iOS iOSVer, *)
+#else
+#    define ANGLE_APPLE_AVAILABLE_XCI(macVer, macCatalystVer, iOSVer) \
+        ANGLE_APPLE_AVAILABLE_XI(macVer, iOSVer)
+
+#    define ANGLE_APPLE_AVAILABLE_XC(macVer, macCatalystVer) @available(macOS macVer, *)
+#    define ANGLE_APPLE_AVAILABLE_CI(macCatalystVer, iOSVer) @available(iOS iOSVer, tvOS iOSVer, *)
+#endif
+
+// ANGLE_APPLE_AVAILABLE_XI: check if either of the 2 platforms (OSX/iOS) min verions is available:
+#define ANGLE_APPLE_AVAILABLE_XI(macVer, iOSVer) \
+    @available(macOS macVer, iOS iOSVer, tvOS iOSVer, *)
+
+// ANGLE_APPLE_AVAILABLE_I: check if a particular iOS version is available
+#define ANGLE_APPLE_AVAILABLE_I(iOSVer) @available(iOS iOSVer, tvOS iOSVer, *)
+
+#if TARGET_OS_IPHONE
+#    if !defined(__IPHONE_11_0)
+#        define __IPHONE_11_0 110000
+#    endif
+#    if !defined(ANGLE_IOS_DEPLOY_TARGET)
+#        define ANGLE_IOS_DEPLOY_TARGET __IPHONE_11_0
+#    endif
+#    if !defined(__IPHONE_OS_VERSION_MAX_ALLOWED)
+#        define __IPHONE_OS_VERSION_MAX_ALLOWED __IPHONE_11_0
+#    endif
+#    if !defined(__TV_OS_VERSION_MAX_ALLOWED)
+#        define __TV_OS_VERSION_MAX_ALLOWED __IPHONE_11_0
+#    endif
+#endif
+
+#if !defined(TARGET_OS_MACCATALYST)
+#    define TARGET_OS_MACCATALYST 0
+#endif
+
+#if defined(__ARM_ARCH)
+#    define ANGLE_APPLE_IS_ARM (__ARM_ARCH != 0)
+#else
+#    define ANGLE_APPLE_IS_ARM 0
+#endif
+
+#define ANGLE_APPLE_OBJC_SCOPE @autoreleasepool
+
+#if !__has_feature(objc_arc)
+#    define ANGLE_APPLE_AUTORELEASE autorelease
+#    define ANGLE_APPLE_RETAIN retain
+#    define ANGLE_APPLE_RELEASE release
+#else
+#    define ANGLE_APPLE_AUTORELEASE self
+#    define ANGLE_APPLE_RETAIN self
+#    define ANGLE_APPLE_RELEASE self
+#endif
+
+#define ANGLE_APPLE_UNUSED __attribute__((unused))
+
+namespace angle
+{
+bool IsMetalRendererAvailable();
+}
+
+#endif
diff --git a/gfx/angle/checkout/src/common/bitset_utils.h b/gfx/angle/checkout/src/common/bitset_utils.h
new file mode 100644
index 0000000000..ee9a3f1b9b
--- /dev/null
+++ b/gfx/angle/checkout/src/common/bitset_utils.h
@@ -0,0 +1,1106 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// bitset_utils:
+//   Bitset-related helper classes, such as a fast iterator to scan for set bits.
+//
+
+#ifndef COMMON_BITSETITERATOR_H_
+#define COMMON_BITSETITERATOR_H_
+
+#include <stdint.h>
+
+#include <array>
+
+#include "common/angleutils.h"
+#include "common/debug.h"
+#include "common/mathutil.h"
+#include "common/platform.h"
+
+namespace angle
+{
+// Given x, create 1 << x.
+template <typename BitsT, typename ParamT>
+constexpr BitsT Bit(ParamT x)
+{
+    // It's undefined behavior if the shift size is equal to or larger than the width of the type.
+    ASSERT(static_cast<size_t>(x) < sizeof(BitsT) * 8);
+
+    return (static_cast<BitsT>(1) << static_cast<size_t>(x));
+}
+
+// Given x, create (1 << x) - 1, i.e. a mask with x bits set.
+template <typename BitsT, typename ParamT>
+constexpr BitsT BitMask(ParamT x)
+{
+    if (static_cast<size_t>(x) == 0)
+    {
+        return 0;
+    }
+    return ((Bit<BitsT>(static_cast<ParamT>(static_cast<size_t>(x) - 1)) - 1) << 1) | 1;
+}
+
+template <size_t N, typename BitsT, typename ParamT = std::size_t>
+class BitSetT final
+{
+  public:
+    class Reference final
+    {
+      public:
+        ~Reference() {}
+        Reference &operator=(bool x)
+        {
+            mParent->set(mBit, x);
+            return *this;
+        }
+        explicit operator bool() const { return mParent->test(mBit); }
+
+      private:
+        friend class BitSetT;
+
+        Reference(BitSetT *parent, ParamT bit) : mParent(parent), mBit(bit) {}
+
+        BitSetT *mParent;
+        ParamT mBit;
+    };
+
+    class Iterator final
+    {
+      public:
+        Iterator(const BitSetT &bits);
+        Iterator &operator++();
+
+        bool operator==(const Iterator &other) const;
+        bool operator!=(const Iterator &other) const;
+        ParamT operator*() const;
+
+        // These helper functions allow mutating an iterator in-flight.
+        // They only operate on later bits to ensure we don't iterate the same bit twice.
+        void resetLaterBit(std::size_t index)
+        {
+            ASSERT(index > mCurrentBit);
+            mBitsCopy.reset(index);
+        }
+
+        void setLaterBit(std::size_t index)
+        {
+            ASSERT(index > mCurrentBit);
+            mBitsCopy.set(index);
+        }
+
+        void setLaterBits(const BitSetT &bits)
+        {
+            ASSERT((BitSetT(bits) &= Mask(mCurrentBit + 1)).none());
+            mBitsCopy |= bits;
+        }
+
+      private:
+        std::size_t getNextBit();
+
+        BitSetT mBitsCopy;
+        std::size_t mCurrentBit;
+    };
+
+    using value_type = BitsT;
+    using param_type = ParamT;
+
+    constexpr BitSetT();
+    constexpr explicit BitSetT(BitsT value);
+    constexpr explicit BitSetT(std::initializer_list<ParamT> init);
+
+    constexpr BitSetT(const BitSetT &other);
+    constexpr BitSetT &operator=(const BitSetT &other);
+
+    constexpr bool operator==(const BitSetT &other) const;
+    constexpr bool operator!=(const BitSetT &other) const;
+
+    constexpr bool operator[](ParamT pos) const;
+    Reference operator[](ParamT pos) { return Reference(this, pos); }
+
+    constexpr bool test(ParamT pos) const;
+
+    constexpr bool all() const;
+    constexpr bool any() const;
+    constexpr bool none() const;
+    constexpr std::size_t count() const;
+
+    constexpr static std::size_t size() { return N; }
+
+    constexpr BitSetT &operator&=(const BitSetT &other);
+    constexpr BitSetT &operator|=(const BitSetT &other);
+    constexpr BitSetT &operator^=(const BitSetT &other);
+    constexpr BitSetT operator~() const;
+
+    constexpr BitSetT &operator&=(BitsT value);
+    constexpr BitSetT &operator|=(BitsT value);
+    constexpr BitSetT &operator^=(BitsT value);
+
+    constexpr BitSetT operator<<(std::size_t pos) const;
+    constexpr BitSetT &operator<<=(std::size_t pos);
+    constexpr BitSetT operator>>(std::size_t pos) const;
+    constexpr BitSetT &operator>>=(std::size_t pos);
+
+    constexpr BitSetT &set();
+    constexpr BitSetT &set(ParamT pos, bool value = true);
+
+    constexpr BitSetT &reset();
+    constexpr BitSetT &reset(ParamT pos);
+
+    constexpr BitSetT &flip();
+    constexpr BitSetT &flip(ParamT pos);
+
+    constexpr unsigned long to_ulong() const { return static_cast<unsigned long>(mBits); }
+    constexpr BitsT bits() const { return mBits; }
+
+    Iterator begin() const { return Iterator(*this); }
+    Iterator end() const { return Iterator(BitSetT()); }
+
+    constexpr static BitSetT Zero() { return BitSetT(); }
+
+    constexpr ParamT first() const;
+    constexpr ParamT last() const;
+
+    // Produces a mask of ones up to the "x"th bit.
+    constexpr static BitsT Mask(std::size_t x) { return BitMask<BitsT>(static_cast<ParamT>(x)); }
+
+  private:
+    BitsT mBits;
+};
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT>::BitSetT() : mBits(0)
+{
+    static_assert(N > 0, "Bitset type cannot support zero bits.");
+    static_assert(N <= sizeof(BitsT) * 8, "Bitset type cannot support a size this large.");
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT>::BitSetT(BitsT value) : mBits(value & Mask(N))
+{}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT>::BitSetT(std::initializer_list<ParamT> init) : mBits(0)
+{
+    for (ParamT element : init)
+    {
+        mBits |= Bit<BitsT>(element);
+    }
+    ASSERT(mBits == (mBits & Mask(N)));
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT>::BitSetT(const BitSetT &other) : mBits(other.mBits)
+{}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator=(const BitSetT &other)
+{
+    mBits = other.mBits;
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr bool BitSetT<N, BitsT, ParamT>::operator==(const BitSetT &other) const
+{
+    return mBits == other.mBits;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr bool BitSetT<N, BitsT, ParamT>::operator!=(const BitSetT &other) const
+{
+    return mBits != other.mBits;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr bool BitSetT<N, BitsT, ParamT>::operator[](ParamT pos) const
+{
+    return test(pos);
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr bool BitSetT<N, BitsT, ParamT>::test(ParamT pos) const
+{
+    return (mBits & Bit<BitsT>(pos)) != 0;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr bool BitSetT<N, BitsT, ParamT>::all() const
+{
+    ASSERT(mBits == (mBits & Mask(N)));
+    return mBits == Mask(N);
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr bool BitSetT<N, BitsT, ParamT>::any() const
+{
+    ASSERT(mBits == (mBits & Mask(N)));
+    return (mBits != 0);
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr bool BitSetT<N, BitsT, ParamT>::none() const
+{
+    ASSERT(mBits == (mBits & Mask(N)));
+    return (mBits == 0);
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr std::size_t BitSetT<N, BitsT, ParamT>::count() const
+{
+    return gl::BitCount(mBits);
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator&=(const BitSetT &other)
+{
+    mBits &= other.mBits;
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator|=(const BitSetT &other)
+{
+    mBits |= other.mBits;
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator^=(const BitSetT &other)
+{
+    mBits = mBits ^ other.mBits;
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> BitSetT<N, BitsT, ParamT>::operator~() const
+{
+    return BitSetT<N, BitsT, ParamT>(~mBits & Mask(N));
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator&=(BitsT value)
+{
+    mBits &= value;
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator|=(BitsT value)
+{
+    mBits |= value;
+    ASSERT(mBits == (mBits & Mask(N)));
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator^=(BitsT value)
+{
+    mBits ^= value;
+    ASSERT(mBits == (mBits & Mask(N)));
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> BitSetT<N, BitsT, ParamT>::operator<<(std::size_t pos) const
+{
+    return BitSetT<N, BitsT, ParamT>((mBits << pos) & Mask(N));
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator<<=(std::size_t pos)
+{
+    mBits = mBits << pos & Mask(N);
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> BitSetT<N, BitsT, ParamT>::operator>>(std::size_t pos) const
+{
+    return BitSetT<N, BitsT, ParamT>(mBits >> pos);
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::operator>>=(std::size_t pos)
+{
+    mBits = (mBits >> pos) & Mask(N);
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::set()
+{
+    ASSERT(mBits == (mBits & Mask(N)));
+    mBits = Mask(N);
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::set(ParamT pos, bool value)
+{
+    ASSERT(static_cast<size_t>(pos) < N);
+    if (value)
+    {
+        mBits |= Bit<BitsT>(pos);
+    }
+    else
+    {
+        reset(pos);
+    }
+    ASSERT(mBits == (mBits & Mask(N)));
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::reset()
+{
+    ASSERT(mBits == (mBits & Mask(N)));
+    mBits = 0;
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::reset(ParamT pos)
+{
+    ASSERT(static_cast<size_t>(pos) < N);
+    ASSERT(mBits == (mBits & Mask(N)));
+    mBits &= ~Bit<BitsT>(pos);
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::flip()
+{
+    ASSERT(mBits == (mBits & Mask(N)));
+    mBits ^= Mask(N);
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr BitSetT<N, BitsT, ParamT> &BitSetT<N, BitsT, ParamT>::flip(ParamT pos)
+{
+    ASSERT(static_cast<size_t>(pos) < N);
+    mBits ^= Bit<BitsT>(pos);
+    ASSERT(mBits == (mBits & Mask(N)));
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr ParamT BitSetT<N, BitsT, ParamT>::first() const
+{
+    ASSERT(!none());
+    return static_cast<ParamT>(gl::ScanForward(mBits));
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+constexpr ParamT BitSetT<N, BitsT, ParamT>::last() const
+{
+    ASSERT(!none());
+    return static_cast<ParamT>(gl::ScanReverse(mBits));
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+BitSetT<N, BitsT, ParamT>::Iterator::Iterator(const BitSetT &bits) : mBitsCopy(bits), mCurrentBit(0)
+{
+    if (bits.any())
+    {
+        mCurrentBit = getNextBit();
+    }
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+ANGLE_INLINE typename BitSetT<N, BitsT, ParamT>::Iterator &
+BitSetT<N, BitsT, ParamT>::Iterator::operator++()
+{
+    ASSERT(mBitsCopy.any());
+    mBitsCopy.reset(static_cast<ParamT>(mCurrentBit));
+    mCurrentBit = getNextBit();
+    return *this;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+bool BitSetT<N, BitsT, ParamT>::Iterator::operator==(const Iterator &other) const
+{
+    return mBitsCopy == other.mBitsCopy;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+bool BitSetT<N, BitsT, ParamT>::Iterator::operator!=(const Iterator &other) const
+{
+    return !(*this == other);
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+ParamT BitSetT<N, BitsT, ParamT>::Iterator::operator*() const
+{
+    return static_cast<ParamT>(mCurrentBit);
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+std::size_t BitSetT<N, BitsT, ParamT>::Iterator::getNextBit()
+{
+    if (mBitsCopy.none())
+    {
+        return 0;
+    }
+
+    return gl::ScanForward(mBitsCopy.mBits);
+}
+
+template <size_t N>
+using BitSet8 = BitSetT<N, uint8_t>;
+
+template <size_t N>
+using BitSet16 = BitSetT<N, uint16_t>;
+
+template <size_t N>
+using BitSet32 = BitSetT<N, uint32_t>;
+
+template <size_t N>
+using BitSet64 = BitSetT<N, uint64_t>;
+
+template <std::size_t N>
+class BitSetArray;
+
+namespace priv
+{
+
+template <size_t N, typename T>
+using EnableIfBitsFit = typename std::enable_if<N <= sizeof(T) * 8>::type;
+
+template <size_t N, typename Enable = void>
+struct GetBitSet
+{
+    using Type = BitSetArray<N>;
+};
+
+// Prefer 64-bit bitsets on 64-bit CPUs. They seem faster than 32-bit.
+#if defined(ANGLE_IS_64_BIT_CPU)
+template <size_t N>
+struct GetBitSet<N, EnableIfBitsFit<N, uint64_t>>
+{
+    using Type = BitSet64<N>;
+};
+constexpr std::size_t kDefaultBitSetSize = 64;
+using BaseBitSetType                     = BitSet64<kDefaultBitSetSize>;
+#else
+template <size_t N>
+struct GetBitSet<N, EnableIfBitsFit<N, uint32_t>>
+{
+    using Type = BitSet32<N>;
+};
+constexpr std::size_t kDefaultBitSetSize = 32;
+using BaseBitSetType                     = BitSet32<kDefaultBitSetSize>;
+#endif  // defined(ANGLE_IS_64_BIT_CPU)
+
+}  // namespace priv
+
+template <size_t N>
+using BitSet = typename priv::GetBitSet<N>::Type;
+
+template <std::size_t N>
+class BitSetArray final
+{
+  public:
+    using BaseBitSet = priv::BaseBitSetType;
+    using value_type = BaseBitSet::value_type;
+    using param_type = BaseBitSet::param_type;
+
+    constexpr BitSetArray();
+    constexpr explicit BitSetArray(std::initializer_list<param_type> init);
+
+    BitSetArray(const BitSetArray<N> &other);
+
+    class Reference final
+    {
+      public:
+        ~Reference() {}
+        Reference &operator=(bool x)
+        {
+            mParent.set(mPosition, x);
+            return *this;
+        }
+        explicit operator bool() const { return mParent.test(mPosition); }
+
+      private:
+        friend class BitSetArray;
+
+        Reference(BitSetArray &parent, std::size_t pos) : mParent(parent), mPosition(pos) {}
+
+        BitSetArray &mParent;
+        std::size_t mPosition;
+    };
+    class Iterator final
+    {
+      public:
+        Iterator(const BitSetArray<N> &bitSetArray, std::size_t index);
+        Iterator &operator++();
+        bool operator==(const Iterator &other) const;
+        bool operator!=(const Iterator &other) const;
+        size_t operator*() const;
+
+        // These helper functions allow mutating an iterator in-flight.
+        // They only operate on later bits to ensure we don't iterate the same bit twice.
+        void resetLaterBit(std::size_t pos)
+        {
+            ASSERT(pos > (mIndex * priv::kDefaultBitSetSize) + *mCurrentIterator);
+            prepareCopy();
+            mParentCopy.reset(pos);
+            updateIteratorBit(pos, false);
+        }
+
+        void setLaterBit(std::size_t pos)
+        {
+            ASSERT(pos > (mIndex * priv::kDefaultBitSetSize) + *mCurrentIterator);
+            prepareCopy();
+            mParentCopy.set(pos);
+            updateIteratorBit(pos, true);
+        }
+
+        void setLaterBits(const BitSetArray &bits)
+        {
+            prepareCopy();
+            mParentCopy |= bits;
+            updateIteratorBits(bits);
+        }
+
+      private:
+        ANGLE_INLINE void prepareCopy()
+        {
+            ASSERT(mParent.mBaseBitSetArray[mIndex].end() ==
+                   mParentCopy.mBaseBitSetArray[mIndex].end());
+            if (mParentCopy.none())
+            {
+                mParentCopy    = mParent;
+                mCurrentParent = &mParentCopy;
+            }
+        }
+
+        ANGLE_INLINE void updateIteratorBit(std::size_t pos, bool setBit)
+        {
+            // Get the index and offset, update current interator if within range
+            size_t index  = pos >> kShiftForDivision;
+            size_t offset = pos & kDefaultBitSetSizeMinusOne;
+            if (index == mIndex)
+            {
+                if (setBit)
+                {
+                    mCurrentIterator.setLaterBit(offset);
+                }
+                else
+                {
+                    mCurrentIterator.resetLaterBit(offset);
+                }
+            }
+        }
+
+        ANGLE_INLINE void updateIteratorBits(const BitSetArray &bits)
+        {
+            mCurrentIterator.setLaterBits(bits.mBaseBitSetArray[mIndex]);
+        }
+
+        // Problem -
+        // We want to provide the fastest path possible for usecases that iterate though the bitset.
+        //
+        // Options -
+        // 1) For non-mutating iterations the const ref <mParent> is set as mCurrentParent and only
+        //    for usecases that need to mutate the bitset while iterating we perform a copy of
+        //    <mParent> into <mParentCopy> and modify its bits accordingly.
+        // 2) The alternate approach was to perform a copy all the time in the constructor
+        //    irrespective of whether it was a mutating usecase or not.
+        //
+        // Experiment -
+        // BitSetIteratorPerfTest was run on a Windows machine with Intel CPU and these were the
+        // results -
+        // 1) Copy only when necessary -
+        //      RESULT BitSetIteratorPerf.wall_time:    run = 116.1067374961 ns
+        //      RESULT BitSetIteratorPerf.trial_steps : run = 8416124 count
+        //      RESULT BitSetIteratorPerf.total_steps : run = 16832251 count
+        // 2) Copy always -
+        //      RESULT BitSetIteratorPerf.wall_time:    run = 242.7446459439 ns
+        //      RESULT BitSetIteratorPerf.trial_steps : run = 4171416 count
+        //      RESULT BitSetIteratorPerf.total_steps : run = 8342834 count
+        //
+        // Resolution -
+        // We settled on the copy only when necessary path.
+        size_t mIndex;
+        const BitSetArray &mParent;
+        BitSetArray mParentCopy;
+        const BitSetArray *mCurrentParent;
+        typename BaseBitSet::Iterator mCurrentIterator;
+    };
+
+    constexpr static std::size_t size() { return N; }
+    Iterator begin() const { return Iterator(*this, 0); }
+    Iterator end() const { return Iterator(*this, kArraySize); }
+    constexpr unsigned long to_ulong() const
+    {
+        // TODO(anglebug.com/5628): Handle serializing more than kDefaultBitSetSize
+        for (std::size_t index = 1; index < kArraySize; index++)
+        {
+            ASSERT(mBaseBitSetArray[index].none());
+        }
+        return static_cast<unsigned long>(mBaseBitSetArray[0].to_ulong());
+    }
+
+    // Assignment operators
+    constexpr BitSetArray &operator=(const BitSetArray &other);
+    constexpr BitSetArray &operator&=(const BitSetArray &other);
+    constexpr BitSetArray &operator|=(const BitSetArray &other);
+    constexpr BitSetArray &operator^=(const BitSetArray &other);
+
+    // Bitwise operators
+    constexpr BitSetArray<N> operator&(const angle::BitSetArray<N> &other) const;
+    constexpr BitSetArray<N> operator|(const angle::BitSetArray<N> &other) const;
+    constexpr BitSetArray<N> operator^(const angle::BitSetArray<N> &other) const;
+
+    // Relational Operators
+    constexpr bool operator==(const angle::BitSetArray<N> &other) const;
+    constexpr bool operator!=(const angle::BitSetArray<N> &other) const;
+
+    // Unary operators
+    constexpr BitSetArray operator~() const;
+    constexpr bool operator[](std::size_t pos) const;
+    constexpr Reference operator[](std::size_t pos)
+    {
+        ASSERT(pos < size());
+        return Reference(*this, pos);
+    }
+
+    // Setter, getters and other helper methods
+    constexpr BitSetArray &set();
+    constexpr BitSetArray &set(std::size_t pos, bool value = true);
+    constexpr BitSetArray &reset();
+    constexpr BitSetArray &reset(std::size_t pos);
+    constexpr bool test(std::size_t pos) const;
+    constexpr bool all() const;
+    constexpr bool any() const;
+    constexpr bool none() const;
+    constexpr std::size_t count() const;
+    constexpr bool intersects(const BitSetArray &other) const;
+    constexpr BitSetArray<N> &flip();
+    constexpr param_type first() const;
+    constexpr param_type last() const;
+
+    constexpr value_type bits(size_t index) const;
+
+  private:
+    static constexpr std::size_t kDefaultBitSetSizeMinusOne = priv::kDefaultBitSetSize - 1;
+    static constexpr std::size_t kShiftForDivision =
+        static_cast<std::size_t>(rx::Log2(static_cast<unsigned int>(priv::kDefaultBitSetSize)));
+    static constexpr std::size_t kArraySize =
+        ((N + kDefaultBitSetSizeMinusOne) >> kShiftForDivision);
+    constexpr static std::size_t kLastElementCount = (N & kDefaultBitSetSizeMinusOne);
+    constexpr static std::size_t kLastElementMask  = priv::BaseBitSetType::Mask(
+         kLastElementCount == 0 ? priv::kDefaultBitSetSize : kLastElementCount);
+
+    std::array<BaseBitSet, kArraySize> mBaseBitSetArray;
+};
+
+template <std::size_t N>
+constexpr BitSetArray<N>::BitSetArray()
+{
+    static_assert(N > priv::kDefaultBitSetSize, "BitSetArray type can't support requested size.");
+    reset();
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N>::BitSetArray(std::initializer_list<param_type> init)
+{
+    reset();
+
+    for (param_type element : init)
+    {
+        size_t index  = element >> kShiftForDivision;
+        size_t offset = element & kDefaultBitSetSizeMinusOne;
+        mBaseBitSetArray[index].set(offset, true);
+    }
+}
+
+template <size_t N>
+BitSetArray<N>::BitSetArray(const BitSetArray<N> &other)
+{
+    for (std::size_t index = 0; index < kArraySize; index++)
+    {
+        mBaseBitSetArray[index] = other.mBaseBitSetArray[index];
+    }
+}
+
+template <size_t N>
+BitSetArray<N>::Iterator::Iterator(const BitSetArray<N> &bitSetArray, std::size_t index)
+    : mIndex(index),
+      mParent(bitSetArray),
+      mCurrentParent(&mParent),
+      mCurrentIterator(mParent.mBaseBitSetArray[0].begin())
+{
+    while (mIndex < mCurrentParent->kArraySize)
+    {
+        if (mCurrentParent->mBaseBitSetArray[mIndex].any())
+        {
+            break;
+        }
+        mIndex++;
+    }
+
+    if (mIndex < mCurrentParent->kArraySize)
+    {
+        mCurrentIterator = mCurrentParent->mBaseBitSetArray[mIndex].begin();
+    }
+    else
+    {
+        mCurrentIterator = mCurrentParent->mBaseBitSetArray[mCurrentParent->kArraySize - 1].end();
+    }
+}
+
+template <std::size_t N>
+typename BitSetArray<N>::Iterator &BitSetArray<N>::Iterator::operator++()
+{
+    ++mCurrentIterator;
+    while (mCurrentIterator == mCurrentParent->mBaseBitSetArray[mIndex].end())
+    {
+        mIndex++;
+        if (mIndex >= mCurrentParent->kArraySize)
+        {
+            break;
+        }
+        mCurrentIterator = mCurrentParent->mBaseBitSetArray[mIndex].begin();
+    }
+    return *this;
+}
+
+template <std::size_t N>
+bool BitSetArray<N>::Iterator::operator==(const BitSetArray<N>::Iterator &other) const
+{
+    return mCurrentIterator == other.mCurrentIterator;
+}
+
+template <std::size_t N>
+bool BitSetArray<N>::Iterator::operator!=(const BitSetArray<N>::Iterator &other) const
+{
+    return mCurrentIterator != other.mCurrentIterator;
+}
+
+template <std::size_t N>
+std::size_t BitSetArray<N>::Iterator::operator*() const
+{
+    return (mIndex * priv::kDefaultBitSetSize) + *mCurrentIterator;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::operator=(const BitSetArray<N> &other)
+{
+    for (std::size_t index = 0; index < kArraySize; index++)
+    {
+        mBaseBitSetArray[index] = other.mBaseBitSetArray[index];
+    }
+    return *this;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::operator&=(const BitSetArray<N> &other)
+{
+    for (std::size_t index = 0; index < kArraySize; index++)
+    {
+        mBaseBitSetArray[index] &= other.mBaseBitSetArray[index];
+    }
+    return *this;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::operator|=(const BitSetArray<N> &other)
+{
+    for (std::size_t index = 0; index < kArraySize; index++)
+    {
+        mBaseBitSetArray[index] |= other.mBaseBitSetArray[index];
+    }
+    return *this;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::operator^=(const BitSetArray<N> &other)
+{
+    for (std::size_t index = 0; index < kArraySize; index++)
+    {
+        mBaseBitSetArray[index] ^= other.mBaseBitSetArray[index];
+    }
+    return *this;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> BitSetArray<N>::operator&(const angle::BitSetArray<N> &other) const
+{
+    angle::BitSetArray<N> result(other);
+    result &= *this;
+    return result;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> BitSetArray<N>::operator|(const angle::BitSetArray<N> &other) const
+{
+    angle::BitSetArray<N> result(other);
+    result |= *this;
+    return result;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> BitSetArray<N>::operator^(const angle::BitSetArray<N> &other) const
+{
+    angle::BitSetArray<N> result(other);
+    result ^= *this;
+    return result;
+}
+
+template <std::size_t N>
+constexpr bool BitSetArray<N>::operator==(const angle::BitSetArray<N> &other) const
+{
+    for (std::size_t index = 0; index < kArraySize; index++)
+    {
+        if (mBaseBitSetArray[index] != other.mBaseBitSetArray[index])
+        {
+            return false;
+        }
+    }
+    return true;
+}
+
+template <std::size_t N>
+constexpr bool BitSetArray<N>::operator!=(const angle::BitSetArray<N> &other) const
+{
+    return !(*this == other);
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> BitSetArray<N>::operator~() const
+{
+    angle::BitSetArray<N> result;
+    for (std::size_t index = 0; index < kArraySize; index++)
+    {
+        result.mBaseBitSetArray[index] |= ~mBaseBitSetArray[index];
+    }
+    // The last element in result may need special handling
+    result.mBaseBitSetArray[kArraySize - 1] &= kLastElementMask;
+
+    return result;
+}
+
+template <std::size_t N>
+constexpr bool BitSetArray<N>::operator[](std::size_t pos) const
+{
+    ASSERT(pos < size());
+    return test(pos);
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::set()
+{
+    for (BaseBitSet &baseBitSet : mBaseBitSetArray)
+    {
+        baseBitSet.set();
+    }
+    // The last element in mBaseBitSetArray may need special handling
+    mBaseBitSetArray[kArraySize - 1] &= kLastElementMask;
+
+    return *this;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::set(std::size_t pos, bool value)
+{
+    ASSERT(pos < size());
+    // Get the index and offset, then set the bit
+    size_t index  = pos >> kShiftForDivision;
+    size_t offset = pos & kDefaultBitSetSizeMinusOne;
+    mBaseBitSetArray[index].set(offset, value);
+    return *this;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::reset()
+{
+    for (BaseBitSet &baseBitSet : mBaseBitSetArray)
+    {
+        baseBitSet.reset();
+    }
+    return *this;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::reset(std::size_t pos)
+{
+    ASSERT(pos < size());
+    return set(pos, false);
+}
+
+template <std::size_t N>
+constexpr bool BitSetArray<N>::test(std::size_t pos) const
+{
+    ASSERT(pos < size());
+    // Get the index and offset, then test the bit
+    size_t index  = pos >> kShiftForDivision;
+    size_t offset = pos & kDefaultBitSetSizeMinusOne;
+    return mBaseBitSetArray[index].test(offset);
+}
+
+template <std::size_t N>
+constexpr bool BitSetArray<N>::all() const
+{
+    constexpr priv::BaseBitSetType kLastElementBitSet = priv::BaseBitSetType(kLastElementMask);
+
+    for (std::size_t index = 0; index < kArraySize - 1; index++)
+    {
+        if (!mBaseBitSetArray[index].all())
+        {
+            return false;
+        }
+    }
+
+    // The last element in mBaseBitSetArray may need special handling
+    return mBaseBitSetArray[kArraySize - 1] == kLastElementBitSet;
+}
+
+template <std::size_t N>
+constexpr bool BitSetArray<N>::any() const
+{
+    for (const BaseBitSet &baseBitSet : mBaseBitSetArray)
+    {
+        if (baseBitSet.any())
+        {
+            return true;
+        }
+    }
+    return false;
+}
+
+template <std::size_t N>
+constexpr bool BitSetArray<N>::none() const
+{
+    for (const BaseBitSet &baseBitSet : mBaseBitSetArray)
+    {
+        if (!baseBitSet.none())
+        {
+            return false;
+        }
+    }
+    return true;
+}
+
+template <std::size_t N>
+constexpr std::size_t BitSetArray<N>::count() const
+{
+    size_t count = 0;
+    for (const BaseBitSet &baseBitSet : mBaseBitSetArray)
+    {
+        count += baseBitSet.count();
+    }
+    return count;
+}
+
+template <std::size_t N>
+constexpr bool BitSetArray<N>::intersects(const BitSetArray<N> &other) const
+{
+    for (std::size_t index = 0; index < kArraySize; index++)
+    {
+        if ((mBaseBitSetArray[index].bits() & other.mBaseBitSetArray[index].bits()) != 0)
+        {
+            return true;
+        }
+    }
+    return false;
+}
+
+template <std::size_t N>
+constexpr BitSetArray<N> &BitSetArray<N>::flip()
+{
+    for (BaseBitSet &baseBitSet : mBaseBitSetArray)
+    {
+        baseBitSet.flip();
+    }
+
+    // The last element in mBaseBitSetArray may need special handling
+    mBaseBitSetArray[kArraySize - 1] &= kLastElementMask;
+    return *this;
+}
+
+template <std::size_t N>
+constexpr typename BitSetArray<N>::param_type BitSetArray<N>::first() const
+{
+    ASSERT(any());
+    for (size_t arrayIndex = 0; arrayIndex < kArraySize; ++arrayIndex)
+    {
+        const BaseBitSet &baseBitSet = mBaseBitSetArray[arrayIndex];
+        if (baseBitSet.any())
+        {
+            return baseBitSet.first() + arrayIndex * priv::kDefaultBitSetSize;
+        }
+    }
+    UNREACHABLE();
+    return 0;
+}
+
+template <std::size_t N>
+constexpr typename BitSetArray<N>::param_type BitSetArray<N>::last() const
+{
+    ASSERT(any());
+    for (size_t arrayIndex = kArraySize; arrayIndex > 0; --arrayIndex)
+    {
+        const BaseBitSet &baseBitSet = mBaseBitSetArray[arrayIndex - 1];
+        if (baseBitSet.any())
+        {
+            return baseBitSet.last() + (arrayIndex - 1) * priv::kDefaultBitSetSize;
+        }
+    }
+    UNREACHABLE();
+    return 0;
+}
+
+template <std::size_t N>
+constexpr typename BitSetArray<N>::value_type BitSetArray<N>::bits(size_t index) const
+{
+    return mBaseBitSetArray[index].bits();
+}
+}  // namespace angle
+
+template <size_t N, typename BitsT, typename ParamT>
+inline constexpr angle::BitSetT<N, BitsT, ParamT> operator&(
+    const angle::BitSetT<N, BitsT, ParamT> &lhs,
+    const angle::BitSetT<N, BitsT, ParamT> &rhs)
+{
+    angle::BitSetT<N, BitsT, ParamT> result(lhs);
+    result &= rhs.bits();
+    return result;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+inline constexpr angle::BitSetT<N, BitsT, ParamT> operator|(
+    const angle::BitSetT<N, BitsT, ParamT> &lhs,
+    const angle::BitSetT<N, BitsT, ParamT> &rhs)
+{
+    angle::BitSetT<N, BitsT, ParamT> result(lhs);
+    result |= rhs.bits();
+    return result;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+inline constexpr angle::BitSetT<N, BitsT, ParamT> operator^(
+    const angle::BitSetT<N, BitsT, ParamT> &lhs,
+    const angle::BitSetT<N, BitsT, ParamT> &rhs)
+{
+    angle::BitSetT<N, BitsT, ParamT> result(lhs);
+    result ^= rhs.bits();
+    return result;
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+inline bool operator==(angle::BitSetT<N, BitsT, ParamT> &lhs, angle::BitSetT<N, BitsT, ParamT> &rhs)
+{
+    return lhs.bits() == rhs.bits();
+}
+
+template <size_t N, typename BitsT, typename ParamT>
+inline bool operator!=(angle::BitSetT<N, BitsT, ParamT> &lhs, angle::BitSetT<N, BitsT, ParamT> &rhs)
+{
+    return !(lhs == rhs);
+}
+
+#endif  // COMMON_BITSETITERATOR_H_
diff --git a/gfx/angle/checkout/src/common/debug.cpp b/gfx/angle/checkout/src/common/debug.cpp
new file mode 100644
index 0000000000..23424d443a
--- /dev/null
+++ b/gfx/angle/checkout/src/common/debug.cpp
@@ -0,0 +1,349 @@
+//
+// Copyright 2002 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// debug.cpp: Debugging utilities.
+
+#include "common/debug.h"
+
+#include <stdarg.h>
+
+#include <array>
+#include <cstdio>
+#include <cstring>
+#include <fstream>
+#include <ostream>
+#include <vector>
+
+#if defined(ANGLE_PLATFORM_ANDROID)
+#    include <android/log.h>
+#endif
+
+#if defined(ANGLE_PLATFORM_APPLE)
+#    include <os/log.h>
+#endif
+
+#if defined(ANGLE_PLATFORM_WINDOWS)
+#    include <windows.h>
+#endif
+
+#include "anglebase/no_destructor.h"
+#include "common/Optional.h"
+#include "common/angleutils.h"
+#include "common/entry_points_enum_autogen.h"
+#include "common/system_utils.h"
+
+namespace gl
+{
+
+namespace
+{
+
+DebugAnnotator *g_debugAnnotator = nullptr;
+
+std::mutex *g_debugMutex = nullptr;
+
+constexpr std::array<const char *, LOG_NUM_SEVERITIES> g_logSeverityNames = {
+    {"EVENT", "INFO", "WARN", "ERR", "FATAL"}};
+
+constexpr const char *LogSeverityName(int severity)
+{
+    return (severity >= 0 && severity < LOG_NUM_SEVERITIES) ? g_logSeverityNames[severity]
+                                                            : "UNKNOWN";
+}
+
+bool ShouldCreateLogMessage(LogSeverity severity)
+{
+#if defined(ANGLE_TRACE_ENABLED)
+    return true;
+#elif defined(ANGLE_ENABLE_ASSERTS)
+    return severity == LOG_FATAL || severity == LOG_ERR || severity == LOG_WARN;
+#else
+    return severity == LOG_FATAL || severity == LOG_ERR;
+#endif
+}
+
+}  // namespace
+
+namespace priv
+{
+
+bool ShouldCreatePlatformLogMessage(LogSeverity severity)
+{
+#if defined(ANGLE_TRACE_ENABLED)
+    return true;
+#else
+    return severity != LOG_EVENT;
+#endif
+}
+
+// This is never instantiated, it's just used for EAT_STREAM_PARAMETERS to an object of the correct
+// type on the LHS of the unused part of the ternary operator.
+std::ostream *gSwallowStream;
+}  // namespace priv
+
+bool DebugAnnotationsActive(const gl::Context *context)
+{
+#if defined(ANGLE_ENABLE_DEBUG_ANNOTATIONS) || defined(ANGLE_ENABLE_DEBUG_TRACE)
+    return g_debugAnnotator != nullptr && g_debugAnnotator->getStatus(context);
+#else
+    return false;
+#endif
+}
+
+bool ShouldBeginScopedEvent(const gl::Context *context)
+{
+#if defined(ANGLE_ENABLE_ANNOTATOR_RUN_TIME_CHECKS)
+    return DebugAnnotationsActive(context);
+#else
+    return true;
+#endif  // defined(ANGLE_ENABLE_ANNOTATOR_RUN_TIME_CHECKS)
+}
+
+bool DebugAnnotationsInitialized()
+{
+    return g_debugAnnotator != nullptr;
+}
+
+void InitializeDebugAnnotations(DebugAnnotator *debugAnnotator)
+{
+    UninitializeDebugAnnotations();
+    g_debugAnnotator = debugAnnotator;
+}
+
+void UninitializeDebugAnnotations()
+{
+    // Pointer is not managed.
+    g_debugAnnotator = nullptr;
+}
+
+void InitializeDebugMutexIfNeeded()
+{
+    if (g_debugMutex == nullptr)
+    {
+        g_debugMutex = new std::mutex();
+    }
+}
+
+std::mutex &GetDebugMutex()
+{
+    ASSERT(g_debugMutex);
+    return *g_debugMutex;
+}
+
+ScopedPerfEventHelper::ScopedPerfEventHelper(gl::Context *context, angle::EntryPoint entryPoint)
+    : mContext(context), mEntryPoint(entryPoint), mFunctionName(nullptr), mCalledBeginEvent(false)
+{}
+
+ScopedPerfEventHelper::~ScopedPerfEventHelper()
+{
+    // EGL_Initialize() and EGL_Terminate() can change g_debugAnnotator.  Must check the value of
+    // g_debugAnnotator and whether ScopedPerfEventHelper::begin() initiated a begine that must be
+    // ended now.
+    if (DebugAnnotationsInitialized() && mCalledBeginEvent)
+    {
+        g_debugAnnotator->endEvent(mContext, mFunctionName, mEntryPoint);
+    }
+}
+
+void ScopedPerfEventHelper::begin(const char *format, ...)
+{
+    mFunctionName = GetEntryPointName(mEntryPoint);
+
+    va_list vararg;
+    va_start(vararg, format);
+
+    std::vector<char> buffer;
+    size_t len = FormatStringIntoVector(format, vararg, buffer);
+    va_end(vararg);
+
+    ANGLE_LOG(EVENT) << std::string(&buffer[0], len);
+    if (DebugAnnotationsInitialized())
+    {
+        mCalledBeginEvent = true;
+        g_debugAnnotator->beginEvent(mContext, mEntryPoint, mFunctionName, buffer.data());
+    }
+}
+
+LogMessage::LogMessage(const char *file, const char *function, int line, LogSeverity severity)
+    : mFile(file), mFunction(function), mLine(line), mSeverity(severity)
+{
+    // INFO() and EVENT() do not require additional function(line) info.
+    if (mSeverity > LOG_INFO)
+    {
+        const char *slash = std::max(strrchr(mFile, '/'), strrchr(mFile, '\\'));
+        mStream << (slash ? (slash + 1) : mFile) << ":" << mLine << " (" << mFunction << "): ";
+    }
+}
+
+LogMessage::~LogMessage()
+{
+    {
+        std::unique_lock<std::mutex> lock;
+        if (g_debugMutex != nullptr)
+        {
+            lock = std::unique_lock<std::mutex>(*g_debugMutex);
+        }
+
+        if (DebugAnnotationsInitialized() && (mSeverity > LOG_INFO))
+        {
+            g_debugAnnotator->logMessage(*this);
+        }
+        else
+        {
+            Trace(getSeverity(), getMessage().c_str());
+        }
+    }
+
+    if (mSeverity == LOG_FATAL)
+    {
+        if (angle::IsDebuggerAttached())
+        {
+            angle::BreakDebugger();
+        }
+        else
+        {
+            ANGLE_CRASH();
+        }
+    }
+}
+
+void Trace(LogSeverity severity, const char *message)
+{
+    if (!ShouldCreateLogMessage(severity))
+    {
+        return;
+    }
+
+    std::string str(message);
+
+    if (DebugAnnotationsActive(/*context=*/nullptr))
+    {
+
+        switch (severity)
+        {
+            case LOG_EVENT:
+                // Debugging logging done in ScopedPerfEventHelper
+                break;
+            default:
+                g_debugAnnotator->setMarker(/*context=*/nullptr, message);
+                break;
+        }
+    }
+
+    if (severity == LOG_FATAL || severity == LOG_ERR || severity == LOG_WARN ||
+#if defined(ANGLE_ENABLE_TRACE_ANDROID_LOGCAT) || defined(ANGLE_ENABLE_TRACE_EVENTS)
+        severity == LOG_EVENT ||
+#endif
+        severity == LOG_INFO)
+    {
+#if defined(ANGLE_PLATFORM_ANDROID)
+        android_LogPriority android_priority = ANDROID_LOG_ERROR;
+        switch (severity)
+        {
+            case LOG_INFO:
+            case LOG_EVENT:
+                android_priority = ANDROID_LOG_INFO;
+                break;
+            case LOG_WARN:
+                android_priority = ANDROID_LOG_WARN;
+                break;
+            case LOG_ERR:
+                android_priority = ANDROID_LOG_ERROR;
+                break;
+            case LOG_FATAL:
+                android_priority = ANDROID_LOG_FATAL;
+                break;
+            default:
+                UNREACHABLE();
+        }
+        __android_log_print(android_priority, "ANGLE", "%s: %s\n", LogSeverityName(severity),
+                            str.c_str());
+#elif defined(ANGLE_PLATFORM_APPLE)
+        if (__builtin_available(macOS 10.12, iOS 10.0, *))
+        {
+            os_log_type_t apple_log_type = OS_LOG_TYPE_DEFAULT;
+            switch (severity)
+            {
+                case LOG_INFO:
+                    apple_log_type = OS_LOG_TYPE_INFO;
+                    break;
+                case LOG_WARN:
+                    apple_log_type = OS_LOG_TYPE_DEFAULT;
+                    break;
+                case LOG_ERR:
+                    apple_log_type = OS_LOG_TYPE_ERROR;
+                    break;
+                case LOG_FATAL:
+                    // OS_LOG_TYPE_FAULT is too severe - grabs the entire process tree.
+                    apple_log_type = OS_LOG_TYPE_ERROR;
+                    break;
+                default:
+                    UNREACHABLE();
+            }
+            os_log_with_type(OS_LOG_DEFAULT, apple_log_type, "ANGLE: %s: %s\n",
+                             LogSeverityName(severity), str.c_str());
+        }
+#else
+        // Note: we use fprintf because <iostream> includes static initializers.
+        fprintf((severity >= LOG_WARN) ? stderr : stdout, "%s: %s\n", LogSeverityName(severity),
+                str.c_str());
+#endif
+    }
+
+#if defined(ANGLE_PLATFORM_WINDOWS) && \
+    (defined(ANGLE_ENABLE_DEBUG_TRACE_TO_DEBUGGER) || !defined(NDEBUG))
+#    if !defined(ANGLE_ENABLE_DEBUG_TRACE_TO_DEBUGGER)
+    if (severity >= LOG_ERR)
+#    endif  // !defined(ANGLE_ENABLE_DEBUG_TRACE_TO_DEBUGGER)
+    {
+        OutputDebugStringA(str.c_str());
+        OutputDebugStringA("\n");
+    }
+#endif
+
+#if defined(ANGLE_ENABLE_DEBUG_TRACE)
+#    if defined(NDEBUG)
+    if (severity == LOG_EVENT || severity == LOG_WARN || severity == LOG_INFO)
+    {
+        return;
+    }
+#    endif  // defined(NDEBUG)
+    static angle::base::NoDestructor<std::ofstream> file(TRACE_OUTPUT_FILE, std::ofstream::app);
+    if (file->good())
+    {
+        if (severity > LOG_EVENT)
+        {
+            *file << LogSeverityName(severity) << ": ";
+        }
+        *file << str << "\n";
+        file->flush();
+    }
+#endif  // defined(ANGLE_ENABLE_DEBUG_TRACE)
+}
+
+LogSeverity LogMessage::getSeverity() const
+{
+    return mSeverity;
+}
+
+std::string LogMessage::getMessage() const
+{
+    return mStream.str();
+}
+
+#if defined(ANGLE_PLATFORM_WINDOWS)
+priv::FmtHexHelper<HRESULT, char> FmtHR(HRESULT value)
+{
+    return priv::FmtHexHelper<HRESULT, char>("HRESULT: ", value);
+}
+
+priv::FmtHexHelper<DWORD, char> FmtErr(DWORD value)
+{
+    return priv::FmtHexHelper<DWORD, char>("error: ", value);
+}
+#endif  // defined(ANGLE_PLATFORM_WINDOWS)
+
+}  // namespace gl
diff --git a/gfx/angle/checkout/src/common/debug.h b/gfx/angle/checkout/src/common/debug.h
new file mode 100644
index 0000000000..a9ee795103
--- /dev/null
+++ b/gfx/angle/checkout/src/common/debug.h
@@ -0,0 +1,468 @@
+//
+// Copyright 2002 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// debug.h: Debugging utilities. A lot of the logging code is adapted from Chromium's
+// base/logging.h.
+
+#ifndef COMMON_DEBUG_H_
+#define COMMON_DEBUG_H_
+
+#include <assert.h>
+#include <stdio.h>
+
+#include <iomanip>
+#include <ios>
+#include <mutex>
+#include <sstream>
+#include <string>
+
+#include "common/angleutils.h"
+#include "common/entry_points_enum_autogen.h"
+#include "common/platform.h"
+
+#if defined(ANGLE_PLATFORM_WINDOWS)
+#    include <sal.h>
+typedef unsigned long DWORD;
+typedef _Return_type_success_(return >= 0) long HRESULT;
+#endif
+
+#if !defined(TRACE_OUTPUT_FILE)
+#    define TRACE_OUTPUT_FILE "angle_debug.txt"
+#endif
+
+namespace gl
+{
+class Context;
+
+// Pairs a begin event with an end event.
+class [[nodiscard]] ScopedPerfEventHelper : angle::NonCopyable
+{
+  public:
+    ScopedPerfEventHelper(Context *context, angle::EntryPoint entryPoint);
+    ~ScopedPerfEventHelper();
+    ANGLE_FORMAT_PRINTF(2, 3)
+    void begin(const char *format, ...);
+
+  private:
+    gl::Context *mContext;
+    const angle::EntryPoint mEntryPoint;
+    const char *mFunctionName;
+    bool mCalledBeginEvent;
+};
+
+using LogSeverity = int;
+// Note: the log severities are used to index into the array of names,
+// see g_logSeverityNames.
+constexpr LogSeverity LOG_EVENT          = 0;
+constexpr LogSeverity LOG_INFO           = 1;
+constexpr LogSeverity LOG_WARN           = 2;
+constexpr LogSeverity LOG_ERR            = 3;
+constexpr LogSeverity LOG_FATAL          = 4;
+constexpr LogSeverity LOG_NUM_SEVERITIES = 5;
+
+void Trace(LogSeverity severity, const char *message);
+
+// This class more or less represents a particular log message.  You
+// create an instance of LogMessage and then stream stuff to it.
+// When you finish streaming to it, ~LogMessage is called and the
+// full message gets streamed to the appropriate destination.
+//
+// You shouldn't actually use LogMessage's constructor to log things,
+// though.  You should use the ERR() and WARN() macros.
+class LogMessage : angle::NonCopyable
+{
+  public:
+    // Used for ANGLE_LOG(severity).
+    LogMessage(const char *file, const char *function, int line, LogSeverity severity);
+    ~LogMessage();
+    std::ostream &stream() { return mStream; }
+
+    LogSeverity getSeverity() const;
+    std::string getMessage() const;
+
+  private:
+    const char *mFile;
+    const char *mFunction;
+    const int mLine;
+    const LogSeverity mSeverity;
+
+    std::ostringstream mStream;
+};
+
+// Wraps the API/Platform-specific debug annotation functions.
+// Also handles redirecting logging destination.
+class DebugAnnotator : angle::NonCopyable
+{
+  public:
+    DebugAnnotator() {}
+    virtual ~DebugAnnotator() {}
+    virtual void beginEvent(gl::Context *context,
+                            angle::EntryPoint entryPoint,
+                            const char *eventName,
+                            const char *eventMessage)                    = 0;
+    virtual void endEvent(gl::Context *context,
+                          const char *eventName,
+                          angle::EntryPoint entryPoint)                  = 0;
+    virtual void setMarker(gl::Context *context, const char *markerName) = 0;
+    virtual bool getStatus(const gl::Context *context)                   = 0;
+    // Log Message Handler that gets passed every log message,
+    // when debug annotations are initialized,
+    // replacing default handling by LogMessage.
+    virtual void logMessage(const LogMessage &msg) const = 0;
+};
+
+bool ShouldBeginScopedEvent(const gl::Context *context);
+void InitializeDebugAnnotations(DebugAnnotator *debugAnnotator);
+void UninitializeDebugAnnotations();
+bool DebugAnnotationsActive(const gl::Context *context);
+bool DebugAnnotationsInitialized();
+
+void InitializeDebugMutexIfNeeded();
+
+std::mutex &GetDebugMutex();
+
+namespace priv
+{
+// This class is used to explicitly ignore values in the conditional logging macros. This avoids
+// compiler warnings like "value computed is not used" and "statement has no effect".
+class LogMessageVoidify
+{
+  public:
+    LogMessageVoidify() {}
+    // This has to be an operator with a precedence lower than << but higher than ?:
+    void operator&(std::ostream &) {}
+};
+
+extern std::ostream *gSwallowStream;
+
+// Used by ANGLE_LOG_IS_ON to lazy-evaluate stream arguments.
+bool ShouldCreatePlatformLogMessage(LogSeverity severity);
+
+// N is the width of the output to the stream. The output is padded with zeros
+// if value is less than N characters.
+// S is the stream type, either ostream for ANSI or wostream for wide character.
+// T is the type of the value to output to the stream.
+// C is the type of characters - either char for ANSI or wchar_t for wide char.
+template <int N, typename S, typename T, typename C>
+S &FmtHex(S &stream, T value, const C *zeroX, C zero)
+{
+    stream << zeroX;
+
+    std::ios_base::fmtflags oldFlags = stream.flags();
+    std::streamsize oldWidth         = stream.width();
+    typename S::char_type oldFill    = stream.fill();
+
+    stream << std::hex << std::uppercase << std::setw(N) << std::setfill(zero) << value;
+
+    stream.flags(oldFlags);
+    stream.width(oldWidth);
+    stream.fill(oldFill);
+
+    return stream;
+}
+
+template <typename S, typename T, typename C>
+S &FmtHexAutoSized(S &stream, T value, const C *prefix, const C *zeroX, C zero)
+{
+    if (prefix)
+    {
+        stream << prefix;
+    }
+
+    constexpr int N = sizeof(T) * 2;
+    return priv::FmtHex<N>(stream, value, zeroX, zero);
+}
+
+template <typename T, typename C>
+class FmtHexHelper
+{
+  public:
+    FmtHexHelper(const C *prefix, T value) : mPrefix(prefix), mValue(value) {}
+    explicit FmtHexHelper(T value) : mPrefix(nullptr), mValue(value) {}
+
+  private:
+    const C *mPrefix;
+    T mValue;
+
+    friend std::ostream &operator<<(std::ostream &os, const FmtHexHelper &fmt)
+    {
+        return FmtHexAutoSized(os, fmt.mValue, fmt.mPrefix, "0x", '0');
+    }
+
+    friend std::wostream &operator<<(std::wostream &wos, const FmtHexHelper &fmt)
+    {
+        return FmtHexAutoSized(wos, fmt.mValue, fmt.mPrefix, L"0x", L'0');
+    }
+};
+
+}  // namespace priv
+
+template <typename T, typename C = char>
+priv::FmtHexHelper<T, C> FmtHex(T value)
+{
+    return priv::FmtHexHelper<T, C>(value);
+}
+
+#if defined(ANGLE_PLATFORM_WINDOWS)
+priv::FmtHexHelper<HRESULT, char> FmtHR(HRESULT value);
+priv::FmtHexHelper<DWORD, char> FmtErr(DWORD value);
+#endif  // defined(ANGLE_PLATFORM_WINDOWS)
+
+template <typename T>
+std::ostream &FmtHex(std::ostream &os, T value)
+{
+    return priv::FmtHexAutoSized(os, value, "", "0x", '0');
+}
+
+// A few definitions of macros that don't generate much code. These are used
+// by ANGLE_LOG(). Since these are used all over our code, it's
+// better to have compact code for these operations.
+#define COMPACT_ANGLE_LOG_EX_EVENT(ClassName, ...) \
+    ::gl::ClassName(__FILE__, __FUNCTION__, __LINE__, ::gl::LOG_EVENT, ##__VA_ARGS__)
+#define COMPACT_ANGLE_LOG_EX_INFO(ClassName, ...) \
+    ::gl::ClassName(__FILE__, __FUNCTION__, __LINE__, ::gl::LOG_INFO, ##__VA_ARGS__)
+#define COMPACT_ANGLE_LOG_EX_WARN(ClassName, ...) \
+    ::gl::ClassName(__FILE__, __FUNCTION__, __LINE__, ::gl::LOG_WARN, ##__VA_ARGS__)
+#define COMPACT_ANGLE_LOG_EX_ERR(ClassName, ...) \
+    ::gl::ClassName(__FILE__, __FUNCTION__, __LINE__, ::gl::LOG_ERR, ##__VA_ARGS__)
+#define COMPACT_ANGLE_LOG_EX_FATAL(ClassName, ...) \
+    ::gl::ClassName(__FILE__, __FUNCTION__, __LINE__, ::gl::LOG_FATAL, ##__VA_ARGS__)
+
+#define COMPACT_ANGLE_LOG_EVENT COMPACT_ANGLE_LOG_EX_EVENT(LogMessage)
+#define COMPACT_ANGLE_LOG_INFO COMPACT_ANGLE_LOG_EX_INFO(LogMessage)
+#define COMPACT_ANGLE_LOG_WARN COMPACT_ANGLE_LOG_EX_WARN(LogMessage)
+#define COMPACT_ANGLE_LOG_ERR COMPACT_ANGLE_LOG_EX_ERR(LogMessage)
+#define COMPACT_ANGLE_LOG_FATAL COMPACT_ANGLE_LOG_EX_FATAL(LogMessage)
+
+#define ANGLE_LOG_IS_ON(severity) (::gl::priv::ShouldCreatePlatformLogMessage(::gl::LOG_##severity))
+
+// Helper macro which avoids evaluating the arguments to a stream if the condition doesn't hold.
+// Condition is evaluated once and only once.
+#define ANGLE_LAZY_STREAM(stream, condition) \
+    !(condition) ? static_cast<void>(0) : ::gl::priv::LogMessageVoidify() & (stream)
+
+// We use the preprocessor's merging operator, "##", so that, e.g.,
+// ANGLE_LOG(EVENT) becomes the token COMPACT_ANGLE_LOG_EVENT.  There's some funny
+// subtle difference between ostream member streaming functions (e.g.,
+// ostream::operator<<(int) and ostream non-member streaming functions
+// (e.g., ::operator<<(ostream&, string&): it turns out that it's
+// impossible to stream something like a string directly to an unnamed
+// ostream. We employ a neat hack by calling the stream() member
+// function of LogMessage which seems to avoid the problem.
+#define ANGLE_LOG_STREAM(severity) COMPACT_ANGLE_LOG_##severity.stream()
+
+#define ANGLE_LOG(severity) ANGLE_LAZY_STREAM(ANGLE_LOG_STREAM(severity), ANGLE_LOG_IS_ON(severity))
+
+}  // namespace gl
+
+#if defined(ANGLE_ENABLE_DEBUG_TRACE) || defined(ANGLE_ENABLE_DEBUG_ANNOTATIONS)
+#    define ANGLE_TRACE_ENABLED
+#endif
+
+#if !defined(NDEBUG) || defined(ANGLE_ASSERT_ALWAYS_ON)
+#    define ANGLE_ENABLE_ASSERTS
+#endif
+
+#define INFO() ANGLE_LOG(INFO)
+#define WARN() ANGLE_LOG(WARN)
+#define ERR() ANGLE_LOG(ERR)
+#define FATAL() ANGLE_LOG(FATAL)
+
+// A macro to log a performance event around a scope.
+#if defined(ANGLE_TRACE_ENABLED)
+#    if defined(_MSC_VER)
+#        define EVENT(context, entryPoint, message, ...)                                     \
+            gl::ScopedPerfEventHelper scopedPerfEventHelper##__LINE__(                       \
+                context, angle::EntryPoint::entryPoint);                                     \
+            do                                                                               \
+            {                                                                                \
+                if (gl::ShouldBeginScopedEvent(context))                                     \
+                {                                                                            \
+                    scopedPerfEventHelper##__LINE__.begin(                                   \
+                        "%s(" message ")", GetEntryPointName(angle::EntryPoint::entryPoint), \
+                        __VA_ARGS__);                                                        \
+                }                                                                            \
+            } while (0)
+#    else
+#        define EVENT(context, entryPoint, message, ...)                                          \
+            gl::ScopedPerfEventHelper scopedPerfEventHelper(context,                              \
+                                                            angle::EntryPoint::entryPoint);       \
+            do                                                                                    \
+            {                                                                                     \
+                if (gl::ShouldBeginScopedEvent(context))                                          \
+                {                                                                                 \
+                    scopedPerfEventHelper.begin("%s(" message ")",                                \
+                                                GetEntryPointName(angle::EntryPoint::entryPoint), \
+                                                ##__VA_ARGS__);                                   \
+                }                                                                                 \
+            } while (0)
+#    endif  // _MSC_VER
+#else
+#    define EVENT(message, ...) (void(0))
+#endif
+
+// The state tracked by ANGLE will be validated with the driver state before each call
+#if defined(ANGLE_ENABLE_DEBUG_TRACE)
+#    define ANGLE_STATE_VALIDATION_ENABLED
+#endif
+
+#if defined(__GNUC__)
+#    define ANGLE_CRASH() __builtin_trap()
+#else
+#    define ANGLE_CRASH() ((void)(*(volatile char *)0 = 0)), __assume(0)
+#endif
+
+#if !defined(NDEBUG)
+#    define ANGLE_ASSERT_IMPL(expression) assert(expression)
+#else
+// TODO(jmadill): Detect if debugger is attached and break.
+#    define ANGLE_ASSERT_IMPL(expression) ANGLE_CRASH()
+#endif  // !defined(NDEBUG)
+
+// Note that gSwallowStream is used instead of an arbitrary LOG() stream to avoid the creation of an
+// object with a non-trivial destructor (LogMessage). On MSVC x86 (checked on 2015 Update 3), this
+// causes a few additional pointless instructions to be emitted even at full optimization level,
+// even though the : arm of the ternary operator is clearly never executed. Using a simpler object
+// to be &'d with Voidify() avoids these extra instructions. Using a simpler POD object with a
+// templated operator<< also works to avoid these instructions. However, this causes warnings on
+// statically defined implementations of operator<<(std::ostream, ...) in some .cpp files, because
+// they become defined-but-unreferenced functions. A reinterpret_cast of 0 to an ostream* also is
+// not suitable, because some compilers warn of undefined behavior.
+#define ANGLE_EAT_STREAM_PARAMETERS \
+    true ? static_cast<void>(0) : ::gl::priv::LogMessageVoidify() & (*::gl::priv::gSwallowStream)
+
+// A macro asserting a condition and outputting failures to the debug log
+#if defined(ANGLE_ENABLE_ASSERTS)
+#    define ASSERT(expression)                                                                \
+        (expression ? static_cast<void>(0)                                                    \
+                    : (FATAL() << "\t! Assert failed in " << __FUNCTION__ << " (" << __FILE__ \
+                               << ":" << __LINE__ << "): " << #expression))
+#else
+#    define ASSERT(condition) ANGLE_EAT_STREAM_PARAMETERS << !(condition)
+#endif  // defined(ANGLE_ENABLE_ASSERTS)
+
+#define ANGLE_UNUSED_VARIABLE(variable) (static_cast<void>(variable))
+
+// A macro to indicate unimplemented functionality
+#ifndef NOASSERT_UNIMPLEMENTED
+#    define NOASSERT_UNIMPLEMENTED 1
+#endif
+
+#if defined(ANGLE_TRACE_ENABLED) || defined(ANGLE_ENABLE_ASSERTS)
+#    define UNIMPLEMENTED()                                                                       \
+        do                                                                                        \
+        {                                                                                         \
+            WARN() << "\t! Unimplemented: " << __FUNCTION__ << "(" << __FILE__ << ":" << __LINE__ \
+                   << ")";                                                                        \
+            ASSERT(NOASSERT_UNIMPLEMENTED);                                                       \
+        } while (0)
+
+// A macro for code which is not expected to be reached under valid assumptions
+#    define UNREACHABLE()                                                                    \
+        do                                                                                   \
+        {                                                                                    \
+            FATAL() << "\t! Unreachable reached: " << __FUNCTION__ << "(" << __FILE__ << ":" \
+                    << __LINE__ << ")";                                                      \
+        } while (0)
+#else
+#    define UNIMPLEMENTED()                 \
+        do                                  \
+        {                                   \
+            ASSERT(NOASSERT_UNIMPLEMENTED); \
+        } while (0)
+
+// A macro for code which is not expected to be reached under valid assumptions
+#    define UNREACHABLE()  \
+        do                 \
+        {                  \
+            ASSERT(false); \
+        } while (0)
+#endif  // defined(ANGLE_TRACE_ENABLED) || defined(ANGLE_ENABLE_ASSERTS)
+
+#if defined(ANGLE_PLATFORM_WINDOWS)
+#    define ANGLE_FUNCTION __FUNCTION__
+#else
+#    define ANGLE_FUNCTION __func__
+#endif
+
+// Defining ANGLE_ENABLE_STRUCT_PADDING_WARNINGS will enable warnings when members are added to
+// structs to enforce packing. This is helpful for diagnosing unexpected struct sizes when making
+// fast cache variables.
+#if defined(__clang__)
+#    define ANGLE_ENABLE_STRUCT_PADDING_WARNINGS \
+        _Pragma("clang diagnostic push") _Pragma("clang diagnostic error \"-Wpadded\"")
+#    define ANGLE_DISABLE_STRUCT_PADDING_WARNINGS _Pragma("clang diagnostic pop")
+#elif defined(__GNUC__)
+#    define ANGLE_ENABLE_STRUCT_PADDING_WARNINGS \
+        _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic error \"-Wpadded\"")
+#    define ANGLE_DISABLE_STRUCT_PADDING_WARNINGS _Pragma("GCC diagnostic pop")
+#elif defined(_MSC_VER)
+#    define ANGLE_ENABLE_STRUCT_PADDING_WARNINGS \
+        __pragma(warning(push)) __pragma(warning(error : 4820))
+#    define ANGLE_DISABLE_STRUCT_PADDING_WARNINGS __pragma(warning(pop))
+#else
+#    define ANGLE_ENABLE_STRUCT_PADDING_WARNINGS
+#    define ANGLE_DISABLE_STRUCT_PADDING_WARNINGS
+#endif
+
+#if defined(__clang__)
+#    define ANGLE_DISABLE_SUGGEST_OVERRIDE_WARNINGS                               \
+        _Pragma("clang diagnostic push")                                          \
+            _Pragma("clang diagnostic ignored \"-Wsuggest-destructor-override\"") \
+                _Pragma("clang diagnostic ignored \"-Wsuggest-override\"")
+#    define ANGLE_REENABLE_SUGGEST_OVERRIDE_WARNINGS _Pragma("clang diagnostic pop")
+#else
+#    define ANGLE_DISABLE_SUGGEST_OVERRIDE_WARNINGS
+#    define ANGLE_REENABLE_SUGGEST_OVERRIDE_WARNINGS
+#endif
+
+#if defined(__clang__)
+#    define ANGLE_DISABLE_EXTRA_SEMI_WARNING \
+        _Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Wextra-semi\"")
+#    define ANGLE_REENABLE_EXTRA_SEMI_WARNING _Pragma("clang diagnostic pop")
+#else
+#    define ANGLE_DISABLE_EXTRA_SEMI_WARNING
+#    define ANGLE_REENABLE_EXTRA_SEMI_WARNING
+#endif
+
+#if defined(__clang__)
+#    define ANGLE_DISABLE_EXTRA_SEMI_STMT_WARNING \
+        _Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Wextra-semi-stmt\"")
+#    define ANGLE_REENABLE_EXTRA_SEMI_STMT_WARNING _Pragma("clang diagnostic pop")
+#else
+#    define ANGLE_DISABLE_EXTRA_SEMI_STMT_WARNING
+#    define ANGLE_REENABLE_EXTRA_SEMI_STMT_WARNING
+#endif
+
+#if defined(__clang__)
+#    define ANGLE_DISABLE_SHADOWING_WARNING \
+        _Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Wshadow-field\"")
+#    define ANGLE_REENABLE_SHADOWING_WARNING _Pragma("clang diagnostic pop")
+#else
+#    define ANGLE_DISABLE_SHADOWING_WARNING
+#    define ANGLE_REENABLE_SHADOWING_WARNING
+#endif
+
+#if defined(__clang__)
+#    define ANGLE_DISABLE_DESTRUCTOR_OVERRIDE_WARNING \
+        _Pragma("clang diagnostic push")              \
+            _Pragma("clang diagnostic ignored \"-Winconsistent-missing-destructor-override\"")
+#    define ANGLE_REENABLE_DESTRUCTOR_OVERRIDE_WARNING _Pragma("clang diagnostic pop")
+#else
+#    define ANGLE_DISABLE_DESTRUCTOR_OVERRIDE_WARNING
+#    define ANGLE_REENABLE_DESTRUCTOR_OVERRIDE_WARNING
+#endif
+
+#if defined(__clang__)
+#    define ANGLE_DISABLE_UNUSED_FUNCTION_WARNING \
+        _Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Wunused-function\"")
+#    define ANGLE_REENABLE_UNUSED_FUNCTION_WARNING _Pragma("clang diagnostic pop")
+#else
+#    define ANGLE_DISABLE_UNUSED_FUNCTION_WARNING
+#    define ANGLE_REENABLE_UNUSED_FUNCTION_WARNING
+#endif
+
+#endif  // COMMON_DEBUG_H_
diff --git a/gfx/angle/checkout/src/common/entry_points_enum_autogen.cpp b/gfx/angle/checkout/src/common/entry_points_enum_autogen.cpp
new file mode 100644
index 0000000000..993eecc8da
--- /dev/null
+++ b/gfx/angle/checkout/src/common/entry_points_enum_autogen.cpp
@@ -0,0 +1,3454 @@
+// GENERATED FILE - DO NOT EDIT.
+// Generated by generate_entry_points.py using data from gl.xml and gl_angle_ext.xml.
+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// entry_points_enum_autogen.cpp:
+//   Helper methods for the GL/GLES entry points enumeration.
+
+#include "common/entry_points_enum_autogen.h"
+
+#include "common/debug.h"
+
+namespace angle
+{
+const char *GetEntryPointName(EntryPoint ep)
+{
+    switch (ep)
+    {
+        case EntryPoint::CLBuildProgram:
+            return "clBuildProgram";
+        case EntryPoint::CLCloneKernel:
+            return "clCloneKernel";
+        case EntryPoint::CLCompileProgram:
+            return "clCompileProgram";
+        case EntryPoint::CLCreateBuffer:
+            return "clCreateBuffer";
+        case EntryPoint::CLCreateBufferWithProperties:
+            return "clCreateBufferWithProperties";
+        case EntryPoint::CLCreateCommandQueue:
+            return "clCreateCommandQueue";
+        case EntryPoint::CLCreateCommandQueueWithProperties:
+            return "clCreateCommandQueueWithProperties";
+        case EntryPoint::CLCreateContext:
+            return "clCreateContext";
+        case EntryPoint::CLCreateContextFromType:
+            return "clCreateContextFromType";
+        case EntryPoint::CLCreateImage:
+            return "clCreateImage";
+        case EntryPoint::CLCreateImage2D:
+            return "clCreateImage2D";
+        case EntryPoint::CLCreateImage3D:
+            return "clCreateImage3D";
+        case EntryPoint::CLCreateImageWithProperties:
+            return "clCreateImageWithProperties";
+        case EntryPoint::CLCreateKernel:
+            return "clCreateKernel";
+        case EntryPoint::CLCreateKernelsInProgram:
+            return "clCreateKernelsInProgram";
+        case EntryPoint::CLCreatePipe:
+            return "clCreatePipe";
+        case EntryPoint::CLCreateProgramWithBinary:
+            return "clCreateProgramWithBinary";
+        case EntryPoint::CLCreateProgramWithBuiltInKernels:
+            return "clCreateProgramWithBuiltInKernels";
+        case EntryPoint::CLCreateProgramWithIL:
+            return "clCreateProgramWithIL";
+        case EntryPoint::CLCreateProgramWithSource:
+            return "clCreateProgramWithSource";
+        case EntryPoint::CLCreateSampler:
+            return "clCreateSampler";
+        case EntryPoint::CLCreateSamplerWithProperties:
+            return "clCreateSamplerWithProperties";
+        case EntryPoint::CLCreateSubBuffer:
+            return "clCreateSubBuffer";
+        case EntryPoint::CLCreateSubDevices:
+            return "clCreateSubDevices";
+        case EntryPoint::CLCreateUserEvent:
+            return "clCreateUserEvent";
+        case EntryPoint::CLEnqueueBarrier:
+            return "clEnqueueBarrier";
+        case EntryPoint::CLEnqueueBarrierWithWaitList:
+            return "clEnqueueBarrierWithWaitList";
+        case EntryPoint::CLEnqueueCopyBuffer:
+            return "clEnqueueCopyBuffer";
+        case EntryPoint::CLEnqueueCopyBufferRect:
+            return "clEnqueueCopyBufferRect";
+        case EntryPoint::CLEnqueueCopyBufferToImage:
+            return "clEnqueueCopyBufferToImage";
+        case EntryPoint::CLEnqueueCopyImage:
+            return "clEnqueueCopyImage";
+        case EntryPoint::CLEnqueueCopyImageToBuffer:
+            return "clEnqueueCopyImageToBuffer";
+        case EntryPoint::CLEnqueueFillBuffer:
+            return "clEnqueueFillBuffer";
+        case EntryPoint::CLEnqueueFillImage:
+            return "clEnqueueFillImage";
+        case EntryPoint::CLEnqueueMapBuffer:
+            return "clEnqueueMapBuffer";
+        case EntryPoint::CLEnqueueMapImage:
+            return "clEnqueueMapImage";
+        case EntryPoint::CLEnqueueMarker:
+            return "clEnqueueMarker";
+        case EntryPoint::CLEnqueueMarkerWithWaitList:
+            return "clEnqueueMarkerWithWaitList";
+        case EntryPoint::CLEnqueueMigrateMemObjects:
+            return "clEnqueueMigrateMemObjects";
+        case EntryPoint::CLEnqueueNDRangeKernel:
+            return "clEnqueueNDRangeKernel";
+        case EntryPoint::CLEnqueueNativeKernel:
+            return "clEnqueueNativeKernel";
+        case EntryPoint::CLEnqueueReadBuffer:
+            return "clEnqueueReadBuffer";
+        case EntryPoint::CLEnqueueReadBufferRect:
+            return "clEnqueueReadBufferRect";
+        case EntryPoint::CLEnqueueReadImage:
+            return "clEnqueueReadImage";
+        case EntryPoint::CLEnqueueSVMFree:
+            return "clEnqueueSVMFree";
+        case EntryPoint::CLEnqueueSVMMap:
+            return "clEnqueueSVMMap";
+        case EntryPoint::CLEnqueueSVMMemFill:
+            return "clEnqueueSVMMemFill";
+        case EntryPoint::CLEnqueueSVMMemcpy:
+            return "clEnqueueSVMMemcpy";
+        case EntryPoint::CLEnqueueSVMMigrateMem:
+            return "clEnqueueSVMMigrateMem";
+        case EntryPoint::CLEnqueueSVMUnmap:
+            return "clEnqueueSVMUnmap";
+        case EntryPoint::CLEnqueueTask:
+            return "clEnqueueTask";
+        case EntryPoint::CLEnqueueUnmapMemObject:
+            return "clEnqueueUnmapMemObject";
+        case EntryPoint::CLEnqueueWaitForEvents:
+            return "clEnqueueWaitForEvents";
+        case EntryPoint::CLEnqueueWriteBuffer:
+            return "clEnqueueWriteBuffer";
+        case EntryPoint::CLEnqueueWriteBufferRect:
+            return "clEnqueueWriteBufferRect";
+        case EntryPoint::CLEnqueueWriteImage:
+            return "clEnqueueWriteImage";
+        case EntryPoint::CLFinish:
+            return "clFinish";
+        case EntryPoint::CLFlush:
+            return "clFlush";
+        case EntryPoint::CLGetCommandQueueInfo:
+            return "clGetCommandQueueInfo";
+        case EntryPoint::CLGetContextInfo:
+            return "clGetContextInfo";
+        case EntryPoint::CLGetDeviceAndHostTimer:
+            return "clGetDeviceAndHostTimer";
+        case EntryPoint::CLGetDeviceIDs:
+            return "clGetDeviceIDs";
+        case EntryPoint::CLGetDeviceInfo:
+            return "clGetDeviceInfo";
+        case EntryPoint::CLGetEventInfo:
+            return "clGetEventInfo";
+        case EntryPoint::CLGetEventProfilingInfo:
+            return "clGetEventProfilingInfo";
+        case EntryPoint::CLGetExtensionFunctionAddress:
+            return "clGetExtensionFunctionAddress";
+        case EntryPoint::CLGetExtensionFunctionAddressForPlatform:
+            return "clGetExtensionFunctionAddressForPlatform";
+        case EntryPoint::CLGetHostTimer:
+            return "clGetHostTimer";
+        case EntryPoint::CLGetImageInfo:
+            return "clGetImageInfo";
+        case EntryPoint::CLGetKernelArgInfo:
+            return "clGetKernelArgInfo";
+        case EntryPoint::CLGetKernelInfo:
+            return "clGetKernelInfo";
+        case EntryPoint::CLGetKernelSubGroupInfo:
+            return "clGetKernelSubGroupInfo";
+        case EntryPoint::CLGetKernelWorkGroupInfo:
+            return "clGetKernelWorkGroupInfo";
+        case EntryPoint::CLGetMemObjectInfo:
+            return "clGetMemObjectInfo";
+        case EntryPoint::CLGetPipeInfo:
+            return "clGetPipeInfo";
+        case EntryPoint::CLGetPlatformIDs:
+            return "clGetPlatformIDs";
+        case EntryPoint::CLGetPlatformInfo:
+            return "clGetPlatformInfo";
+        case EntryPoint::CLGetProgramBuildInfo:
+            return "clGetProgramBuildInfo";
+        case EntryPoint::CLGetProgramInfo:
+            return "clGetProgramInfo";
+        case EntryPoint::CLGetSamplerInfo:
+            return "clGetSamplerInfo";
+        case EntryPoint::CLGetSupportedImageFormats:
+            return "clGetSupportedImageFormats";
+        case EntryPoint::CLIcdGetPlatformIDsKHR:
+            return "clIcdGetPlatformIDsKHR";
+        case EntryPoint::CLLinkProgram:
+            return "clLinkProgram";
+        case EntryPoint::CLReleaseCommandQueue:
+            return "clReleaseCommandQueue";
+        case EntryPoint::CLReleaseContext:
+            return "clReleaseContext";
+        case EntryPoint::CLReleaseDevice:
+            return "clReleaseDevice";
+        case EntryPoint::CLReleaseEvent:
+            return "clReleaseEvent";
+        case EntryPoint::CLReleaseKernel:
+            return "clReleaseKernel";
+        case EntryPoint::CLReleaseMemObject:
+            return "clReleaseMemObject";
+        case EntryPoint::CLReleaseProgram:
+            return "clReleaseProgram";
+        case EntryPoint::CLReleaseSampler:
+            return "clReleaseSampler";
+        case EntryPoint::CLRetainCommandQueue:
+            return "clRetainCommandQueue";
+        case EntryPoint::CLRetainContext:
+            return "clRetainContext";
+        case EntryPoint::CLRetainDevice:
+            return "clRetainDevice";
+        case EntryPoint::CLRetainEvent:
+            return "clRetainEvent";
+        case EntryPoint::CLRetainKernel:
+            return "clRetainKernel";
+        case EntryPoint::CLRetainMemObject:
+            return "clRetainMemObject";
+        case EntryPoint::CLRetainProgram:
+            return "clRetainProgram";
+        case EntryPoint::CLRetainSampler:
+            return "clRetainSampler";
+        case EntryPoint::CLSVMAlloc:
+            return "clSVMAlloc";
+        case EntryPoint::CLSVMFree:
+            return "clSVMFree";
+        case EntryPoint::CLSetCommandQueueProperty:
+            return "clSetCommandQueueProperty";
+        case EntryPoint::CLSetContextDestructorCallback:
+            return "clSetContextDestructorCallback";
+        case EntryPoint::CLSetDefaultDeviceCommandQueue:
+            return "clSetDefaultDeviceCommandQueue";
+        case EntryPoint::CLSetEventCallback:
+            return "clSetEventCallback";
+        case EntryPoint::CLSetKernelArg:
+            return "clSetKernelArg";
+        case EntryPoint::CLSetKernelArgSVMPointer:
+            return "clSetKernelArgSVMPointer";
+        case EntryPoint::CLSetKernelExecInfo:
+            return "clSetKernelExecInfo";
+        case EntryPoint::CLSetMemObjectDestructorCallback:
+            return "clSetMemObjectDestructorCallback";
+        case EntryPoint::CLSetProgramReleaseCallback:
+            return "clSetProgramReleaseCallback";
+        case EntryPoint::CLSetProgramSpecializationConstant:
+            return "clSetProgramSpecializationConstant";
+        case EntryPoint::CLSetUserEventStatus:
+            return "clSetUserEventStatus";
+        case EntryPoint::CLUnloadCompiler:
+            return "clUnloadCompiler";
+        case EntryPoint::CLUnloadPlatformCompiler:
+            return "clUnloadPlatformCompiler";
+        case EntryPoint::CLWaitForEvents:
+            return "clWaitForEvents";
+        case EntryPoint::EGLBindAPI:
+            return "eglBindAPI";
+        case EntryPoint::EGLBindTexImage:
+            return "eglBindTexImage";
+        case EntryPoint::EGLChooseConfig:
+            return "eglChooseConfig";
+        case EntryPoint::EGLClientWaitSync:
+            return "eglClientWaitSync";
+        case EntryPoint::EGLClientWaitSyncKHR:
+            return "eglClientWaitSyncKHR";
+        case EntryPoint::EGLCopyBuffers:
+            return "eglCopyBuffers";
+        case EntryPoint::EGLCopyMetalSharedEventANGLE:
+            return "eglCopyMetalSharedEventANGLE";
+        case EntryPoint::EGLCreateContext:
+            return "eglCreateContext";
+        case EntryPoint::EGLCreateDeviceANGLE:
+            return "eglCreateDeviceANGLE";
+        case EntryPoint::EGLCreateImage:
+            return "eglCreateImage";
+        case EntryPoint::EGLCreateImageKHR:
+            return "eglCreateImageKHR";
+        case EntryPoint::EGLCreateNativeClientBufferANDROID:
+            return "eglCreateNativeClientBufferANDROID";
+        case EntryPoint::EGLCreatePbufferFromClientBuffer:
+            return "eglCreatePbufferFromClientBuffer";
+        case EntryPoint::EGLCreatePbufferSurface:
+            return "eglCreatePbufferSurface";
+        case EntryPoint::EGLCreatePixmapSurface:
+            return "eglCreatePixmapSurface";
+        case EntryPoint::EGLCreatePlatformPixmapSurface:
+            return "eglCreatePlatformPixmapSurface";
+        case EntryPoint::EGLCreatePlatformPixmapSurfaceEXT:
+            return "eglCreatePlatformPixmapSurfaceEXT";
+        case EntryPoint::EGLCreatePlatformWindowSurface:
+            return "eglCreatePlatformWindowSurface";
+        case EntryPoint::EGLCreatePlatformWindowSurfaceEXT:
+            return "eglCreatePlatformWindowSurfaceEXT";
+        case EntryPoint::EGLCreateStreamKHR:
+            return "eglCreateStreamKHR";
+        case EntryPoint::EGLCreateStreamProducerD3DTextureANGLE:
+            return "eglCreateStreamProducerD3DTextureANGLE";
+        case EntryPoint::EGLCreateSync:
+            return "eglCreateSync";
+        case EntryPoint::EGLCreateSyncKHR:
+            return "eglCreateSyncKHR";
+        case EntryPoint::EGLCreateWindowSurface:
+            return "eglCreateWindowSurface";
+        case EntryPoint::EGLDebugMessageControlKHR:
+            return "eglDebugMessageControlKHR";
+        case EntryPoint::EGLDestroyContext:
+            return "eglDestroyContext";
+        case EntryPoint::EGLDestroyImage:
+            return "eglDestroyImage";
+        case EntryPoint::EGLDestroyImageKHR:
+            return "eglDestroyImageKHR";
+        case EntryPoint::EGLDestroyStreamKHR:
+            return "eglDestroyStreamKHR";
+        case EntryPoint::EGLDestroySurface:
+            return "eglDestroySurface";
+        case EntryPoint::EGLDestroySync:
+            return "eglDestroySync";
+        case EntryPoint::EGLDestroySyncKHR:
+            return "eglDestroySyncKHR";
+        case EntryPoint::EGLDupNativeFenceFDANDROID:
+            return "eglDupNativeFenceFDANDROID";
+        case EntryPoint::EGLExportVkImageANGLE:
+            return "eglExportVkImageANGLE";
+        case EntryPoint::EGLForceGPUSwitchANGLE:
+            return "eglForceGPUSwitchANGLE";
+        case EntryPoint::EGLGetCompositorTimingANDROID:
+            return "eglGetCompositorTimingANDROID";
+        case EntryPoint::EGLGetCompositorTimingSupportedANDROID:
+            return "eglGetCompositorTimingSupportedANDROID";
+        case EntryPoint::EGLGetConfigAttrib:
+            return "eglGetConfigAttrib";
+        case EntryPoint::EGLGetConfigs:
+            return "eglGetConfigs";
+        case EntryPoint::EGLGetCurrentContext:
+            return "eglGetCurrentContext";
+        case EntryPoint::EGLGetCurrentDisplay:
+            return "eglGetCurrentDisplay";
+        case EntryPoint::EGLGetCurrentSurface:
+            return "eglGetCurrentSurface";
+        case EntryPoint::EGLGetDisplay:
+            return "eglGetDisplay";
+        case EntryPoint::EGLGetError:
+            return "eglGetError";
+        case EntryPoint::EGLGetFrameTimestampSupportedANDROID:
+            return "eglGetFrameTimestampSupportedANDROID";
+        case EntryPoint::EGLGetFrameTimestampsANDROID:
+            return "eglGetFrameTimestampsANDROID";
+        case EntryPoint::EGLGetMscRateANGLE:
+            return "eglGetMscRateANGLE";
+        case EntryPoint::EGLGetNativeClientBufferANDROID:
+            return "eglGetNativeClientBufferANDROID";
+        case EntryPoint::EGLGetNextFrameIdANDROID:
+            return "eglGetNextFrameIdANDROID";
+        case EntryPoint::EGLGetPlatformDisplay:
+            return "eglGetPlatformDisplay";
+        case EntryPoint::EGLGetPlatformDisplayEXT:
+            return "eglGetPlatformDisplayEXT";
+        case EntryPoint::EGLGetProcAddress:
+            return "eglGetProcAddress";
+        case EntryPoint::EGLGetSyncAttrib:
+            return "eglGetSyncAttrib";
+        case EntryPoint::EGLGetSyncAttribKHR:
+            return "eglGetSyncAttribKHR";
+        case EntryPoint::EGLGetSyncValuesCHROMIUM:
+            return "eglGetSyncValuesCHROMIUM";
+        case EntryPoint::EGLHandleGPUSwitchANGLE:
+            return "eglHandleGPUSwitchANGLE";
+        case EntryPoint::EGLInitialize:
+            return "eglInitialize";
+        case EntryPoint::EGLLabelObjectKHR:
+            return "eglLabelObjectKHR";
+        case EntryPoint::EGLLockSurfaceKHR:
+            return "eglLockSurfaceKHR";
+        case EntryPoint::EGLMakeCurrent:
+            return "eglMakeCurrent";
+        case EntryPoint::EGLPostSubBufferNV:
+            return "eglPostSubBufferNV";
+        case EntryPoint::EGLPrepareSwapBuffersANGLE:
+            return "eglPrepareSwapBuffersANGLE";
+        case EntryPoint::EGLPresentationTimeANDROID:
+            return "eglPresentationTimeANDROID";
+        case EntryPoint::EGLProgramCacheGetAttribANGLE:
+            return "eglProgramCacheGetAttribANGLE";
+        case EntryPoint::EGLProgramCachePopulateANGLE:
+            return "eglProgramCachePopulateANGLE";
+        case EntryPoint::EGLProgramCacheQueryANGLE:
+            return "eglProgramCacheQueryANGLE";
+        case EntryPoint::EGLProgramCacheResizeANGLE:
+            return "eglProgramCacheResizeANGLE";
+        case EntryPoint::EGLQueryAPI:
+            return "eglQueryAPI";
+        case EntryPoint::EGLQueryContext:
+            return "eglQueryContext";
+        case EntryPoint::EGLQueryDebugKHR:
+            return "eglQueryDebugKHR";
+        case EntryPoint::EGLQueryDeviceAttribEXT:
+            return "eglQueryDeviceAttribEXT";
+        case EntryPoint::EGLQueryDeviceStringEXT:
+            return "eglQueryDeviceStringEXT";
+        case EntryPoint::EGLQueryDisplayAttribANGLE:
+            return "eglQueryDisplayAttribANGLE";
+        case EntryPoint::EGLQueryDisplayAttribEXT:
+            return "eglQueryDisplayAttribEXT";
+        case EntryPoint::EGLQueryDmaBufFormatsEXT:
+            return "eglQueryDmaBufFormatsEXT";
+        case EntryPoint::EGLQueryDmaBufModifiersEXT:
+            return "eglQueryDmaBufModifiersEXT";
+        case EntryPoint::EGLQueryStreamKHR:
+            return "eglQueryStreamKHR";
+        case EntryPoint::EGLQueryStreamu64KHR:
+            return "eglQueryStreamu64KHR";
+        case EntryPoint::EGLQueryString:
+            return "eglQueryString";
+        case EntryPoint::EGLQueryStringiANGLE:
+            return "eglQueryStringiANGLE";
+        case EntryPoint::EGLQuerySurface:
+            return "eglQuerySurface";
+        case EntryPoint::EGLQuerySurface64KHR:
+            return "eglQuerySurface64KHR";
+        case EntryPoint::EGLQuerySurfacePointerANGLE:
+            return "eglQuerySurfacePointerANGLE";
+        case EntryPoint::EGLReacquireHighPowerGPUANGLE:
+            return "eglReacquireHighPowerGPUANGLE";
+        case EntryPoint::EGLReleaseDeviceANGLE:
+            return "eglReleaseDeviceANGLE";
+        case EntryPoint::EGLReleaseHighPowerGPUANGLE:
+            return "eglReleaseHighPowerGPUANGLE";
+        case EntryPoint::EGLReleaseTexImage:
+            return "eglReleaseTexImage";
+        case EntryPoint::EGLReleaseThread:
+            return "eglReleaseThread";
+        case EntryPoint::EGLSetBlobCacheFuncsANDROID:
+            return "eglSetBlobCacheFuncsANDROID";
+        case EntryPoint::EGLSetDamageRegionKHR:
+            return "eglSetDamageRegionKHR";
+        case EntryPoint::EGLSignalSyncKHR:
+            return "eglSignalSyncKHR";
+        case EntryPoint::EGLStreamAttribKHR:
+            return "eglStreamAttribKHR";
+        case EntryPoint::EGLStreamConsumerAcquireKHR:
+            return "eglStreamConsumerAcquireKHR";
+        case EntryPoint::EGLStreamConsumerGLTextureExternalAttribsNV:
+            return "eglStreamConsumerGLTextureExternalAttribsNV";
+        case EntryPoint::EGLStreamConsumerGLTextureExternalKHR:
+            return "eglStreamConsumerGLTextureExternalKHR";
+        case EntryPoint::EGLStreamConsumerReleaseKHR:
+            return "eglStreamConsumerReleaseKHR";
+        case EntryPoint::EGLStreamPostD3DTextureANGLE:
+            return "eglStreamPostD3DTextureANGLE";
+        case EntryPoint::EGLSurfaceAttrib:
+            return "eglSurfaceAttrib";
+        case EntryPoint::EGLSwapBuffers:
+            return "eglSwapBuffers";
+        case EntryPoint::EGLSwapBuffersWithDamageKHR:
+            return "eglSwapBuffersWithDamageKHR";
+        case EntryPoint::EGLSwapBuffersWithFrameTokenANGLE:
+            return "eglSwapBuffersWithFrameTokenANGLE";
+        case EntryPoint::EGLSwapInterval:
+            return "eglSwapInterval";
+        case EntryPoint::EGLTerminate:
+            return "eglTerminate";
+        case EntryPoint::EGLUnlockSurfaceKHR:
+            return "eglUnlockSurfaceKHR";
+        case EntryPoint::EGLWaitClient:
+            return "eglWaitClient";
+        case EntryPoint::EGLWaitGL:
+            return "eglWaitGL";
+        case EntryPoint::EGLWaitNative:
+            return "eglWaitNative";
+        case EntryPoint::EGLWaitSync:
+            return "eglWaitSync";
+        case EntryPoint::EGLWaitSyncKHR:
+            return "eglWaitSyncKHR";
+        case EntryPoint::GLAccum:
+            return "glAccum";
+        case EntryPoint::GLAcquireTexturesANGLE:
+            return "glAcquireTexturesANGLE";
+        case EntryPoint::GLActiveShaderProgram:
+            return "glActiveShaderProgram";
+        case EntryPoint::GLActiveShaderProgramEXT:
+            return "glActiveShaderProgramEXT";
+        case EntryPoint::GLActiveTexture:
+            return "glActiveTexture";
+        case EntryPoint::GLAlphaFunc:
+            return "glAlphaFunc";
+        case EntryPoint::GLAlphaFuncx:
+            return "glAlphaFuncx";
+        case EntryPoint::GLAreTexturesResident:
+            return "glAreTexturesResident";
+        case EntryPoint::GLArrayElement:
+            return "glArrayElement";
+        case EntryPoint::GLAttachShader:
+            return "glAttachShader";
+        case EntryPoint::GLBegin:
+            return "glBegin";
+        case EntryPoint::GLBeginConditionalRender:
+            return "glBeginConditionalRender";
+        case EntryPoint::GLBeginPerfMonitorAMD:
+            return "glBeginPerfMonitorAMD";
+        case EntryPoint::GLBeginPixelLocalStorageANGLE:
+            return "glBeginPixelLocalStorageANGLE";
+        case EntryPoint::GLBeginQuery:
+            return "glBeginQuery";
+        case EntryPoint::GLBeginQueryEXT:
+            return "glBeginQueryEXT";
+        case EntryPoint::GLBeginQueryIndexed:
+            return "glBeginQueryIndexed";
+        case EntryPoint::GLBeginTransformFeedback:
+            return "glBeginTransformFeedback";
+        case EntryPoint::GLBindAttribLocation:
+            return "glBindAttribLocation";
+        case EntryPoint::GLBindBuffer:
+            return "glBindBuffer";
+        case EntryPoint::GLBindBufferBase:
+            return "glBindBufferBase";
+        case EntryPoint::GLBindBufferRange:
+            return "glBindBufferRange";
+        case EntryPoint::GLBindBuffersBase:
+            return "glBindBuffersBase";
+        case EntryPoint::GLBindBuffersRange:
+            return "glBindBuffersRange";
+        case EntryPoint::GLBindFragDataLocation:
+            return "glBindFragDataLocation";
+        case EntryPoint::GLBindFragDataLocationEXT:
+            return "glBindFragDataLocationEXT";
+        case EntryPoint::GLBindFragDataLocationIndexed:
+            return "glBindFragDataLocationIndexed";
+        case EntryPoint::GLBindFragDataLocationIndexedEXT:
+            return "glBindFragDataLocationIndexedEXT";
+        case EntryPoint::GLBindFramebuffer:
+            return "glBindFramebuffer";
+        case EntryPoint::GLBindFramebufferOES:
+            return "glBindFramebufferOES";
+        case EntryPoint::GLBindImageTexture:
+            return "glBindImageTexture";
+        case EntryPoint::GLBindImageTextures:
+            return "glBindImageTextures";
+        case EntryPoint::GLBindProgramPipeline:
+            return "glBindProgramPipeline";
+        case EntryPoint::GLBindProgramPipelineEXT:
+            return "glBindProgramPipelineEXT";
+        case EntryPoint::GLBindRenderbuffer:
+            return "glBindRenderbuffer";
+        case EntryPoint::GLBindRenderbufferOES:
+            return "glBindRenderbufferOES";
+        case EntryPoint::GLBindSampler:
+            return "glBindSampler";
+        case EntryPoint::GLBindSamplers:
+            return "glBindSamplers";
+        case EntryPoint::GLBindTexture:
+            return "glBindTexture";
+        case EntryPoint::GLBindTextureUnit:
+            return "glBindTextureUnit";
+        case EntryPoint::GLBindTextures:
+            return "glBindTextures";
+        case EntryPoint::GLBindTransformFeedback:
+            return "glBindTransformFeedback";
+        case EntryPoint::GLBindUniformLocationCHROMIUM:
+            return "glBindUniformLocationCHROMIUM";
+        case EntryPoint::GLBindVertexArray:
+            return "glBindVertexArray";
+        case EntryPoint::GLBindVertexArrayOES:
+            return "glBindVertexArrayOES";
+        case EntryPoint::GLBindVertexBuffer:
+            return "glBindVertexBuffer";
+        case EntryPoint::GLBindVertexBuffers:
+            return "glBindVertexBuffers";
+        case EntryPoint::GLBitmap:
+            return "glBitmap";
+        case EntryPoint::GLBlendBarrier:
+            return "glBlendBarrier";
+        case EntryPoint::GLBlendBarrierKHR:
+            return "glBlendBarrierKHR";
+        case EntryPoint::GLBlendColor:
+            return "glBlendColor";
+        case EntryPoint::GLBlendEquation:
+            return "glBlendEquation";
+        case EntryPoint::GLBlendEquationSeparate:
+            return "glBlendEquationSeparate";
+        case EntryPoint::GLBlendEquationSeparatei:
+            return "glBlendEquationSeparatei";
+        case EntryPoint::GLBlendEquationSeparateiEXT:
+            return "glBlendEquationSeparateiEXT";
+        case EntryPoint::GLBlendEquationSeparateiOES:
+            return "glBlendEquationSeparateiOES";
+        case EntryPoint::GLBlendEquationi:
+            return "glBlendEquationi";
+        case EntryPoint::GLBlendEquationiEXT:
+            return "glBlendEquationiEXT";
+        case EntryPoint::GLBlendEquationiOES:
+            return "glBlendEquationiOES";
+        case EntryPoint::GLBlendFunc:
+            return "glBlendFunc";
+        case EntryPoint::GLBlendFuncSeparate:
+            return "glBlendFuncSeparate";
+        case EntryPoint::GLBlendFuncSeparatei:
+            return "glBlendFuncSeparatei";
+        case EntryPoint::GLBlendFuncSeparateiEXT:
+            return "glBlendFuncSeparateiEXT";
+        case EntryPoint::GLBlendFuncSeparateiOES:
+            return "glBlendFuncSeparateiOES";
+        case EntryPoint::GLBlendFunci:
+            return "glBlendFunci";
+        case EntryPoint::GLBlendFunciEXT:
+            return "glBlendFunciEXT";
+        case EntryPoint::GLBlendFunciOES:
+            return "glBlendFunciOES";
+        case EntryPoint::GLBlitFramebuffer:
+            return "glBlitFramebuffer";
+        case EntryPoint::GLBlitFramebufferANGLE:
+            return "glBlitFramebufferANGLE";
+        case EntryPoint::GLBlitFramebufferNV:
+            return "glBlitFramebufferNV";
+        case EntryPoint::GLBlitNamedFramebuffer:
+            return "glBlitNamedFramebuffer";
+        case EntryPoint::GLBufferData:
+            return "glBufferData";
+        case EntryPoint::GLBufferStorage:
+            return "glBufferStorage";
+        case EntryPoint::GLBufferStorageEXT:
+            return "glBufferStorageEXT";
+        case EntryPoint::GLBufferStorageExternalEXT:
+            return "glBufferStorageExternalEXT";
+        case EntryPoint::GLBufferStorageMemEXT:
+            return "glBufferStorageMemEXT";
+        case EntryPoint::GLBufferSubData:
+            return "glBufferSubData";
+        case EntryPoint::GLCallList:
+            return "glCallList";
+        case EntryPoint::GLCallLists:
+            return "glCallLists";
+        case EntryPoint::GLCheckFramebufferStatus:
+            return "glCheckFramebufferStatus";
+        case EntryPoint::GLCheckFramebufferStatusOES:
+            return "glCheckFramebufferStatusOES";
+        case EntryPoint::GLCheckNamedFramebufferStatus:
+            return "glCheckNamedFramebufferStatus";
+        case EntryPoint::GLClampColor:
+            return "glClampColor";
+        case EntryPoint::GLClear:
+            return "glClear";
+        case EntryPoint::GLClearAccum:
+            return "glClearAccum";
+        case EntryPoint::GLClearBufferData:
+            return "glClearBufferData";
+        case EntryPoint::GLClearBufferSubData:
+            return "glClearBufferSubData";
+        case EntryPoint::GLClearBufferfi:
+            return "glClearBufferfi";
+        case EntryPoint::GLClearBufferfv:
+            return "glClearBufferfv";
+        case EntryPoint::GLClearBufferiv:
+            return "glClearBufferiv";
+        case EntryPoint::GLClearBufferuiv:
+            return "glClearBufferuiv";
+        case EntryPoint::GLClearColor:
+            return "glClearColor";
+        case EntryPoint::GLClearColorx:
+            return "glClearColorx";
+        case EntryPoint::GLClearDepth:
+            return "glClearDepth";
+        case EntryPoint::GLClearDepthf:
+            return "glClearDepthf";
+        case EntryPoint::GLClearDepthx:
+            return "glClearDepthx";
+        case EntryPoint::GLClearIndex:
+            return "glClearIndex";
+        case EntryPoint::GLClearNamedBufferData:
+            return "glClearNamedBufferData";
+        case EntryPoint::GLClearNamedBufferSubData:
+            return "glClearNamedBufferSubData";
+        case EntryPoint::GLClearNamedFramebufferfi:
+            return "glClearNamedFramebufferfi";
+        case EntryPoint::GLClearNamedFramebufferfv:
+            return "glClearNamedFramebufferfv";
+        case EntryPoint::GLClearNamedFramebufferiv:
+            return "glClearNamedFramebufferiv";
+        case EntryPoint::GLClearNamedFramebufferuiv:
+            return "glClearNamedFramebufferuiv";
+        case EntryPoint::GLClearStencil:
+            return "glClearStencil";
+        case EntryPoint::GLClearTexImage:
+            return "glClearTexImage";
+        case EntryPoint::GLClearTexSubImage:
+            return "glClearTexSubImage";
+        case EntryPoint::GLClientActiveTexture:
+            return "glClientActiveTexture";
+        case EntryPoint::GLClientWaitSync:
+            return "glClientWaitSync";
+        case EntryPoint::GLClipControl:
+            return "glClipControl";
+        case EntryPoint::GLClipControlEXT:
+            return "glClipControlEXT";
+        case EntryPoint::GLClipPlane:
+            return "glClipPlane";
+        case EntryPoint::GLClipPlanef:
+            return "glClipPlanef";
+        case EntryPoint::GLClipPlanex:
+            return "glClipPlanex";
+        case EntryPoint::GLColor3b:
+            return "glColor3b";
+        case EntryPoint::GLColor3bv:
+            return "glColor3bv";
+        case EntryPoint::GLColor3d:
+            return "glColor3d";
+        case EntryPoint::GLColor3dv:
+            return "glColor3dv";
+        case EntryPoint::GLColor3f:
+            return "glColor3f";
+        case EntryPoint::GLColor3fv:
+            return "glColor3fv";
+        case EntryPoint::GLColor3i:
+            return "glColor3i";
+        case EntryPoint::GLColor3iv:
+            return "glColor3iv";
+        case EntryPoint::GLColor3s:
+            return "glColor3s";
+        case EntryPoint::GLColor3sv:
+            return "glColor3sv";
+        case EntryPoint::GLColor3ub:
+            return "glColor3ub";
+        case EntryPoint::GLColor3ubv:
+            return "glColor3ubv";
+        case EntryPoint::GLColor3ui:
+            return "glColor3ui";
+        case EntryPoint::GLColor3uiv:
+            return "glColor3uiv";
+        case EntryPoint::GLColor3us:
+            return "glColor3us";
+        case EntryPoint::GLColor3usv:
+            return "glColor3usv";
+        case EntryPoint::GLColor4b:
+            return "glColor4b";
+        case EntryPoint::GLColor4bv:
+            return "glColor4bv";
+        case EntryPoint::GLColor4d:
+            return "glColor4d";
+        case EntryPoint::GLColor4dv:
+            return "glColor4dv";
+        case EntryPoint::GLColor4f:
+            return "glColor4f";
+        case EntryPoint::GLColor4fv:
+            return "glColor4fv";
+        case EntryPoint::GLColor4i:
+            return "glColor4i";
+        case EntryPoint::GLColor4iv:
+            return "glColor4iv";
+        case EntryPoint::GLColor4s:
+            return "glColor4s";
+        case EntryPoint::GLColor4sv:
+            return "glColor4sv";
+        case EntryPoint::GLColor4ub:
+            return "glColor4ub";
+        case EntryPoint::GLColor4ubv:
+            return "glColor4ubv";
+        case EntryPoint::GLColor4ui:
+            return "glColor4ui";
+        case EntryPoint::GLColor4uiv:
+            return "glColor4uiv";
+        case EntryPoint::GLColor4us:
+            return "glColor4us";
+        case EntryPoint::GLColor4usv:
+            return "glColor4usv";
+        case EntryPoint::GLColor4x:
+            return "glColor4x";
+        case EntryPoint::GLColorMask:
+            return "glColorMask";
+        case EntryPoint::GLColorMaski:
+            return "glColorMaski";
+        case EntryPoint::GLColorMaskiEXT:
+            return "glColorMaskiEXT";
+        case EntryPoint::GLColorMaskiOES:
+            return "glColorMaskiOES";
+        case EntryPoint::GLColorMaterial:
+            return "glColorMaterial";
+        case EntryPoint::GLColorP3ui:
+            return "glColorP3ui";
+        case EntryPoint::GLColorP3uiv:
+            return "glColorP3uiv";
+        case EntryPoint::GLColorP4ui:
+            return "glColorP4ui";
+        case EntryPoint::GLColorP4uiv:
+            return "glColorP4uiv";
+        case EntryPoint::GLColorPointer:
+            return "glColorPointer";
+        case EntryPoint::GLCompileShader:
+            return "glCompileShader";
+        case EntryPoint::GLCompressedCopyTextureCHROMIUM:
+            return "glCompressedCopyTextureCHROMIUM";
+        case EntryPoint::GLCompressedTexImage1D:
+            return "glCompressedTexImage1D";
+        case EntryPoint::GLCompressedTexImage2D:
+            return "glCompressedTexImage2D";
+        case EntryPoint::GLCompressedTexImage2DRobustANGLE:
+            return "glCompressedTexImage2DRobustANGLE";
+        case EntryPoint::GLCompressedTexImage3D:
+            return "glCompressedTexImage3D";
+        case EntryPoint::GLCompressedTexImage3DOES:
+            return "glCompressedTexImage3DOES";
+        case EntryPoint::GLCompressedTexImage3DRobustANGLE:
+            return "glCompressedTexImage3DRobustANGLE";
+        case EntryPoint::GLCompressedTexSubImage1D:
+            return "glCompressedTexSubImage1D";
+        case EntryPoint::GLCompressedTexSubImage2D:
+            return "glCompressedTexSubImage2D";
+        case EntryPoint::GLCompressedTexSubImage2DRobustANGLE:
+            return "glCompressedTexSubImage2DRobustANGLE";
+        case EntryPoint::GLCompressedTexSubImage3D:
+            return "glCompressedTexSubImage3D";
+        case EntryPoint::GLCompressedTexSubImage3DOES:
+            return "glCompressedTexSubImage3DOES";
+        case EntryPoint::GLCompressedTexSubImage3DRobustANGLE:
+            return "glCompressedTexSubImage3DRobustANGLE";
+        case EntryPoint::GLCompressedTextureSubImage1D:
+            return "glCompressedTextureSubImage1D";
+        case EntryPoint::GLCompressedTextureSubImage2D:
+            return "glCompressedTextureSubImage2D";
+        case EntryPoint::GLCompressedTextureSubImage3D:
+            return "glCompressedTextureSubImage3D";
+        case EntryPoint::GLCopyBufferSubData:
+            return "glCopyBufferSubData";
+        case EntryPoint::GLCopyImageSubData:
+            return "glCopyImageSubData";
+        case EntryPoint::GLCopyImageSubDataEXT:
+            return "glCopyImageSubDataEXT";
+        case EntryPoint::GLCopyImageSubDataOES:
+            return "glCopyImageSubDataOES";
+        case EntryPoint::GLCopyNamedBufferSubData:
+            return "glCopyNamedBufferSubData";
+        case EntryPoint::GLCopyPixels:
+            return "glCopyPixels";
+        case EntryPoint::GLCopySubTexture3DANGLE:
+            return "glCopySubTexture3DANGLE";
+        case EntryPoint::GLCopySubTextureCHROMIUM:
+            return "glCopySubTextureCHROMIUM";
+        case EntryPoint::GLCopyTexImage1D:
+            return "glCopyTexImage1D";
+        case EntryPoint::GLCopyTexImage2D:
+            return "glCopyTexImage2D";
+        case EntryPoint::GLCopyTexSubImage1D:
+            return "glCopyTexSubImage1D";
+        case EntryPoint::GLCopyTexSubImage2D:
+            return "glCopyTexSubImage2D";
+        case EntryPoint::GLCopyTexSubImage3D:
+            return "glCopyTexSubImage3D";
+        case EntryPoint::GLCopyTexSubImage3DOES:
+            return "glCopyTexSubImage3DOES";
+        case EntryPoint::GLCopyTexture3DANGLE:
+            return "glCopyTexture3DANGLE";
+        case EntryPoint::GLCopyTextureCHROMIUM:
+            return "glCopyTextureCHROMIUM";
+        case EntryPoint::GLCopyTextureSubImage1D:
+            return "glCopyTextureSubImage1D";
+        case EntryPoint::GLCopyTextureSubImage2D:
+            return "glCopyTextureSubImage2D";
+        case EntryPoint::GLCopyTextureSubImage3D:
+            return "glCopyTextureSubImage3D";
+        case EntryPoint::GLCoverageModulationCHROMIUM:
+            return "glCoverageModulationCHROMIUM";
+        case EntryPoint::GLCreateBuffers:
+            return "glCreateBuffers";
+        case EntryPoint::GLCreateFramebuffers:
+            return "glCreateFramebuffers";
+        case EntryPoint::GLCreateMemoryObjectsEXT:
+            return "glCreateMemoryObjectsEXT";
+        case EntryPoint::GLCreateProgram:
+            return "glCreateProgram";
+        case EntryPoint::GLCreateProgramPipelines:
+            return "glCreateProgramPipelines";
+        case EntryPoint::GLCreateQueries:
+            return "glCreateQueries";
+        case EntryPoint::GLCreateRenderbuffers:
+            return "glCreateRenderbuffers";
+        case EntryPoint::GLCreateSamplers:
+            return "glCreateSamplers";
+        case EntryPoint::GLCreateShader:
+            return "glCreateShader";
+        case EntryPoint::GLCreateShaderProgramv:
+            return "glCreateShaderProgramv";
+        case EntryPoint::GLCreateShaderProgramvEXT:
+            return "glCreateShaderProgramvEXT";
+        case EntryPoint::GLCreateTextures:
+            return "glCreateTextures";
+        case EntryPoint::GLCreateTransformFeedbacks:
+            return "glCreateTransformFeedbacks";
+        case EntryPoint::GLCreateVertexArrays:
+            return "glCreateVertexArrays";
+        case EntryPoint::GLCullFace:
+            return "glCullFace";
+        case EntryPoint::GLCurrentPaletteMatrixOES:
+            return "glCurrentPaletteMatrixOES";
+        case EntryPoint::GLDebugMessageCallback:
+            return "glDebugMessageCallback";
+        case EntryPoint::GLDebugMessageCallbackKHR:
+            return "glDebugMessageCallbackKHR";
+        case EntryPoint::GLDebugMessageControl:
+            return "glDebugMessageControl";
+        case EntryPoint::GLDebugMessageControlKHR:
+            return "glDebugMessageControlKHR";
+        case EntryPoint::GLDebugMessageInsert:
+            return "glDebugMessageInsert";
+        case EntryPoint::GLDebugMessageInsertKHR:
+            return "glDebugMessageInsertKHR";
+        case EntryPoint::GLDeleteBuffers:
+            return "glDeleteBuffers";
+        case EntryPoint::GLDeleteFencesNV:
+            return "glDeleteFencesNV";
+        case EntryPoint::GLDeleteFramebuffers:
+            return "glDeleteFramebuffers";
+        case EntryPoint::GLDeleteFramebuffersOES:
+            return "glDeleteFramebuffersOES";
+        case EntryPoint::GLDeleteLists:
+            return "glDeleteLists";
+        case EntryPoint::GLDeleteMemoryObjectsEXT:
+            return "glDeleteMemoryObjectsEXT";
+        case EntryPoint::GLDeletePerfMonitorsAMD:
+            return "glDeletePerfMonitorsAMD";
+        case EntryPoint::GLDeleteProgram:
+            return "glDeleteProgram";
+        case EntryPoint::GLDeleteProgramPipelines:
+            return "glDeleteProgramPipelines";
+        case EntryPoint::GLDeleteProgramPipelinesEXT:
+            return "glDeleteProgramPipelinesEXT";
+        case EntryPoint::GLDeleteQueries:
+            return "glDeleteQueries";
+        case EntryPoint::GLDeleteQueriesEXT:
+            return "glDeleteQueriesEXT";
+        case EntryPoint::GLDeleteRenderbuffers:
+            return "glDeleteRenderbuffers";
+        case EntryPoint::GLDeleteRenderbuffersOES:
+            return "glDeleteRenderbuffersOES";
+        case EntryPoint::GLDeleteSamplers:
+            return "glDeleteSamplers";
+        case EntryPoint::GLDeleteSemaphoresEXT:
+            return "glDeleteSemaphoresEXT";
+        case EntryPoint::GLDeleteShader:
+            return "glDeleteShader";
+        case EntryPoint::GLDeleteSync:
+            return "glDeleteSync";
+        case EntryPoint::GLDeleteTextures:
+            return "glDeleteTextures";
+        case EntryPoint::GLDeleteTransformFeedbacks:
+            return "glDeleteTransformFeedbacks";
+        case EntryPoint::GLDeleteVertexArrays:
+            return "glDeleteVertexArrays";
+        case EntryPoint::GLDeleteVertexArraysOES:
+            return "glDeleteVertexArraysOES";
+        case EntryPoint::GLDepthFunc:
+            return "glDepthFunc";
+        case EntryPoint::GLDepthMask:
+            return "glDepthMask";
+        case EntryPoint::GLDepthRange:
+            return "glDepthRange";
+        case EntryPoint::GLDepthRangeArrayv:
+            return "glDepthRangeArrayv";
+        case EntryPoint::GLDepthRangeIndexed:
+            return "glDepthRangeIndexed";
+        case EntryPoint::GLDepthRangef:
+            return "glDepthRangef";
+        case EntryPoint::GLDepthRangex:
+            return "glDepthRangex";
+        case EntryPoint::GLDetachShader:
+            return "glDetachShader";
+        case EntryPoint::GLDisable:
+            return "glDisable";
+        case EntryPoint::GLDisableClientState:
+            return "glDisableClientState";
+        case EntryPoint::GLDisableExtensionANGLE:
+            return "glDisableExtensionANGLE";
+        case EntryPoint::GLDisableVertexArrayAttrib:
+            return "glDisableVertexArrayAttrib";
+        case EntryPoint::GLDisableVertexAttribArray:
+            return "glDisableVertexAttribArray";
+        case EntryPoint::GLDisablei:
+            return "glDisablei";
+        case EntryPoint::GLDisableiEXT:
+            return "glDisableiEXT";
+        case EntryPoint::GLDisableiOES:
+            return "glDisableiOES";
+        case EntryPoint::GLDiscardFramebufferEXT:
+            return "glDiscardFramebufferEXT";
+        case EntryPoint::GLDispatchCompute:
+            return "glDispatchCompute";
+        case EntryPoint::GLDispatchComputeIndirect:
+            return "glDispatchComputeIndirect";
+        case EntryPoint::GLDrawArrays:
+            return "glDrawArrays";
+        case EntryPoint::GLDrawArraysIndirect:
+            return "glDrawArraysIndirect";
+        case EntryPoint::GLDrawArraysInstanced:
+            return "glDrawArraysInstanced";
+        case EntryPoint::GLDrawArraysInstancedANGLE:
+            return "glDrawArraysInstancedANGLE";
+        case EntryPoint::GLDrawArraysInstancedBaseInstance:
+            return "glDrawArraysInstancedBaseInstance";
+        case EntryPoint::GLDrawArraysInstancedBaseInstanceANGLE:
+            return "glDrawArraysInstancedBaseInstanceANGLE";
+        case EntryPoint::GLDrawArraysInstancedBaseInstanceEXT:
+            return "glDrawArraysInstancedBaseInstanceEXT";
+        case EntryPoint::GLDrawArraysInstancedEXT:
+            return "glDrawArraysInstancedEXT";
+        case EntryPoint::GLDrawBuffer:
+            return "glDrawBuffer";
+        case EntryPoint::GLDrawBuffers:
+            return "glDrawBuffers";
+        case EntryPoint::GLDrawBuffersEXT:
+            return "glDrawBuffersEXT";
+        case EntryPoint::GLDrawElements:
+            return "glDrawElements";
+        case EntryPoint::GLDrawElementsBaseVertex:
+            return "glDrawElementsBaseVertex";
+        case EntryPoint::GLDrawElementsBaseVertexEXT:
+            return "glDrawElementsBaseVertexEXT";
+        case EntryPoint::GLDrawElementsBaseVertexOES:
+            return "glDrawElementsBaseVertexOES";
+        case EntryPoint::GLDrawElementsIndirect:
+            return "glDrawElementsIndirect";
+        case EntryPoint::GLDrawElementsInstanced:
+            return "glDrawElementsInstanced";
+        case EntryPoint::GLDrawElementsInstancedANGLE:
+            return "glDrawElementsInstancedANGLE";
+        case EntryPoint::GLDrawElementsInstancedBaseInstance:
+            return "glDrawElementsInstancedBaseInstance";
+        case EntryPoint::GLDrawElementsInstancedBaseInstanceEXT:
+            return "glDrawElementsInstancedBaseInstanceEXT";
+        case EntryPoint::GLDrawElementsInstancedBaseVertex:
+            return "glDrawElementsInstancedBaseVertex";
+        case EntryPoint::GLDrawElementsInstancedBaseVertexBaseInstance:
+            return "glDrawElementsInstancedBaseVertexBaseInstance";
+        case EntryPoint::GLDrawElementsInstancedBaseVertexBaseInstanceANGLE:
+            return "glDrawElementsInstancedBaseVertexBaseInstanceANGLE";
+        case EntryPoint::GLDrawElementsInstancedBaseVertexBaseInstanceEXT:
+            return "glDrawElementsInstancedBaseVertexBaseInstanceEXT";
+        case EntryPoint::GLDrawElementsInstancedBaseVertexEXT:
+            return "glDrawElementsInstancedBaseVertexEXT";
+        case EntryPoint::GLDrawElementsInstancedBaseVertexOES:
+            return "glDrawElementsInstancedBaseVertexOES";
+        case EntryPoint::GLDrawElementsInstancedEXT:
+            return "glDrawElementsInstancedEXT";
+        case EntryPoint::GLDrawPixels:
+            return "glDrawPixels";
+        case EntryPoint::GLDrawRangeElements:
+            return "glDrawRangeElements";
+        case EntryPoint::GLDrawRangeElementsBaseVertex:
+            return "glDrawRangeElementsBaseVertex";
+        case EntryPoint::GLDrawRangeElementsBaseVertexEXT:
+            return "glDrawRangeElementsBaseVertexEXT";
+        case EntryPoint::GLDrawRangeElementsBaseVertexOES:
+            return "glDrawRangeElementsBaseVertexOES";
+        case EntryPoint::GLDrawTexfOES:
+            return "glDrawTexfOES";
+        case EntryPoint::GLDrawTexfvOES:
+            return "glDrawTexfvOES";
+        case EntryPoint::GLDrawTexiOES:
+            return "glDrawTexiOES";
+        case EntryPoint::GLDrawTexivOES:
+            return "glDrawTexivOES";
+        case EntryPoint::GLDrawTexsOES:
+            return "glDrawTexsOES";
+        case EntryPoint::GLDrawTexsvOES:
+            return "glDrawTexsvOES";
+        case EntryPoint::GLDrawTexxOES:
+            return "glDrawTexxOES";
+        case EntryPoint::GLDrawTexxvOES:
+            return "glDrawTexxvOES";
+        case EntryPoint::GLDrawTransformFeedback:
+            return "glDrawTransformFeedback";
+        case EntryPoint::GLDrawTransformFeedbackInstanced:
+            return "glDrawTransformFeedbackInstanced";
+        case EntryPoint::GLDrawTransformFeedbackStream:
+            return "glDrawTransformFeedbackStream";
+        case EntryPoint::GLDrawTransformFeedbackStreamInstanced:
+            return "glDrawTransformFeedbackStreamInstanced";
+        case EntryPoint::GLEGLImageTargetRenderbufferStorageOES:
+            return "glEGLImageTargetRenderbufferStorageOES";
+        case EntryPoint::GLEGLImageTargetTexStorageEXT:
+            return "glEGLImageTargetTexStorageEXT";
+        case EntryPoint::GLEGLImageTargetTexture2DOES:
+            return "glEGLImageTargetTexture2DOES";
+        case EntryPoint::GLEGLImageTargetTextureStorageEXT:
+            return "glEGLImageTargetTextureStorageEXT";
+        case EntryPoint::GLEdgeFlag:
+            return "glEdgeFlag";
+        case EntryPoint::GLEdgeFlagPointer:
+            return "glEdgeFlagPointer";
+        case EntryPoint::GLEdgeFlagv:
+            return "glEdgeFlagv";
+        case EntryPoint::GLEnable:
+            return "glEnable";
+        case EntryPoint::GLEnableClientState:
+            return "glEnableClientState";
+        case EntryPoint::GLEnableVertexArrayAttrib:
+            return "glEnableVertexArrayAttrib";
+        case EntryPoint::GLEnableVertexAttribArray:
+            return "glEnableVertexAttribArray";
+        case EntryPoint::GLEnablei:
+            return "glEnablei";
+        case EntryPoint::GLEnableiEXT:
+            return "glEnableiEXT";
+        case EntryPoint::GLEnableiOES:
+            return "glEnableiOES";
+        case EntryPoint::GLEnd:
+            return "glEnd";
+        case EntryPoint::GLEndConditionalRender:
+            return "glEndConditionalRender";
+        case EntryPoint::GLEndList:
+            return "glEndList";
+        case EntryPoint::GLEndPerfMonitorAMD:
+            return "glEndPerfMonitorAMD";
+        case EntryPoint::GLEndPixelLocalStorageANGLE:
+            return "glEndPixelLocalStorageANGLE";
+        case EntryPoint::GLEndQuery:
+            return "glEndQuery";
+        case EntryPoint::GLEndQueryEXT:
+            return "glEndQueryEXT";
+        case EntryPoint::GLEndQueryIndexed:
+            return "glEndQueryIndexed";
+        case EntryPoint::GLEndTransformFeedback:
+            return "glEndTransformFeedback";
+        case EntryPoint::GLEvalCoord1d:
+            return "glEvalCoord1d";
+        case EntryPoint::GLEvalCoord1dv:
+            return "glEvalCoord1dv";
+        case EntryPoint::GLEvalCoord1f:
+            return "glEvalCoord1f";
+        case EntryPoint::GLEvalCoord1fv:
+            return "glEvalCoord1fv";
+        case EntryPoint::GLEvalCoord2d:
+            return "glEvalCoord2d";
+        case EntryPoint::GLEvalCoord2dv:
+            return "glEvalCoord2dv";
+        case EntryPoint::GLEvalCoord2f:
+            return "glEvalCoord2f";
+        case EntryPoint::GLEvalCoord2fv:
+            return "glEvalCoord2fv";
+        case EntryPoint::GLEvalMesh1:
+            return "glEvalMesh1";
+        case EntryPoint::GLEvalMesh2:
+            return "glEvalMesh2";
+        case EntryPoint::GLEvalPoint1:
+            return "glEvalPoint1";
+        case EntryPoint::GLEvalPoint2:
+            return "glEvalPoint2";
+        case EntryPoint::GLFeedbackBuffer:
+            return "glFeedbackBuffer";
+        case EntryPoint::GLFenceSync:
+            return "glFenceSync";
+        case EntryPoint::GLFinish:
+            return "glFinish";
+        case EntryPoint::GLFinishFenceNV:
+            return "glFinishFenceNV";
+        case EntryPoint::GLFlush:
+            return "glFlush";
+        case EntryPoint::GLFlushMappedBufferRange:
+            return "glFlushMappedBufferRange";
+        case EntryPoint::GLFlushMappedBufferRangeEXT:
+            return "glFlushMappedBufferRangeEXT";
+        case EntryPoint::GLFlushMappedNamedBufferRange:
+            return "glFlushMappedNamedBufferRange";
+        case EntryPoint::GLFogCoordPointer:
+            return "glFogCoordPointer";
+        case EntryPoint::GLFogCoordd:
+            return "glFogCoordd";
+        case EntryPoint::GLFogCoorddv:
+            return "glFogCoorddv";
+        case EntryPoint::GLFogCoordf:
+            return "glFogCoordf";
+        case EntryPoint::GLFogCoordfv:
+            return "glFogCoordfv";
+        case EntryPoint::GLFogf:
+            return "glFogf";
+        case EntryPoint::GLFogfv:
+            return "glFogfv";
+        case EntryPoint::GLFogi:
+            return "glFogi";
+        case EntryPoint::GLFogiv:
+            return "glFogiv";
+        case EntryPoint::GLFogx:
+            return "glFogx";
+        case EntryPoint::GLFogxv:
+            return "glFogxv";
+        case EntryPoint::GLFramebufferFetchBarrierEXT:
+            return "glFramebufferFetchBarrierEXT";
+        case EntryPoint::GLFramebufferMemorylessPixelLocalStorageANGLE:
+            return "glFramebufferMemorylessPixelLocalStorageANGLE";
+        case EntryPoint::GLFramebufferParameteri:
+            return "glFramebufferParameteri";
+        case EntryPoint::GLFramebufferParameteriMESA:
+            return "glFramebufferParameteriMESA";
+        case EntryPoint::GLFramebufferRenderbuffer:
+            return "glFramebufferRenderbuffer";
+        case EntryPoint::GLFramebufferRenderbufferOES:
+            return "glFramebufferRenderbufferOES";
+        case EntryPoint::GLFramebufferTexture:
+            return "glFramebufferTexture";
+        case EntryPoint::GLFramebufferTexture1D:
+            return "glFramebufferTexture1D";
+        case EntryPoint::GLFramebufferTexture2D:
+            return "glFramebufferTexture2D";
+        case EntryPoint::GLFramebufferTexture2DMultisampleEXT:
+            return "glFramebufferTexture2DMultisampleEXT";
+        case EntryPoint::GLFramebufferTexture2DOES:
+            return "glFramebufferTexture2DOES";
+        case EntryPoint::GLFramebufferTexture3D:
+            return "glFramebufferTexture3D";
+        case EntryPoint::GLFramebufferTexture3DOES:
+            return "glFramebufferTexture3DOES";
+        case EntryPoint::GLFramebufferTextureEXT:
+            return "glFramebufferTextureEXT";
+        case EntryPoint::GLFramebufferTextureLayer:
+            return "glFramebufferTextureLayer";
+        case EntryPoint::GLFramebufferTextureMultiviewOVR:
+            return "glFramebufferTextureMultiviewOVR";
+        case EntryPoint::GLFramebufferTextureOES:
+            return "glFramebufferTextureOES";
+        case EntryPoint::GLFramebufferTexturePixelLocalStorageANGLE:
+            return "glFramebufferTexturePixelLocalStorageANGLE";
+        case EntryPoint::GLFrontFace:
+            return "glFrontFace";
+        case EntryPoint::GLFrustum:
+            return "glFrustum";
+        case EntryPoint::GLFrustumf:
+            return "glFrustumf";
+        case EntryPoint::GLFrustumx:
+            return "glFrustumx";
+        case EntryPoint::GLGenBuffers:
+            return "glGenBuffers";
+        case EntryPoint::GLGenFencesNV:
+            return "glGenFencesNV";
+        case EntryPoint::GLGenFramebuffers:
+            return "glGenFramebuffers";
+        case EntryPoint::GLGenFramebuffersOES:
+            return "glGenFramebuffersOES";
+        case EntryPoint::GLGenLists:
+            return "glGenLists";
+        case EntryPoint::GLGenPerfMonitorsAMD:
+            return "glGenPerfMonitorsAMD";
+        case EntryPoint::GLGenProgramPipelines:
+            return "glGenProgramPipelines";
+        case EntryPoint::GLGenProgramPipelinesEXT:
+            return "glGenProgramPipelinesEXT";
+        case EntryPoint::GLGenQueries:
+            return "glGenQueries";
+        case EntryPoint::GLGenQueriesEXT:
+            return "glGenQueriesEXT";
+        case EntryPoint::GLGenRenderbuffers:
+            return "glGenRenderbuffers";
+        case EntryPoint::GLGenRenderbuffersOES:
+            return "glGenRenderbuffersOES";
+        case EntryPoint::GLGenSamplers:
+            return "glGenSamplers";
+        case EntryPoint::GLGenSemaphoresEXT:
+            return "glGenSemaphoresEXT";
+        case EntryPoint::GLGenTextures:
+            return "glGenTextures";
+        case EntryPoint::GLGenTransformFeedbacks:
+            return "glGenTransformFeedbacks";
+        case EntryPoint::GLGenVertexArrays:
+            return "glGenVertexArrays";
+        case EntryPoint::GLGenVertexArraysOES:
+            return "glGenVertexArraysOES";
+        case EntryPoint::GLGenerateMipmap:
+            return "glGenerateMipmap";
+        case EntryPoint::GLGenerateMipmapOES:
+            return "glGenerateMipmapOES";
+        case EntryPoint::GLGenerateTextureMipmap:
+            return "glGenerateTextureMipmap";
+        case EntryPoint::GLGetActiveAtomicCounterBufferiv:
+            return "glGetActiveAtomicCounterBufferiv";
+        case EntryPoint::GLGetActiveAttrib:
+            return "glGetActiveAttrib";
+        case EntryPoint::GLGetActiveSubroutineName:
+            return "glGetActiveSubroutineName";
+        case EntryPoint::GLGetActiveSubroutineUniformName:
+            return "glGetActiveSubroutineUniformName";
+        case EntryPoint::GLGetActiveSubroutineUniformiv:
+            return "glGetActiveSubroutineUniformiv";
+        case EntryPoint::GLGetActiveUniform:
+            return "glGetActiveUniform";
+        case EntryPoint::GLGetActiveUniformBlockName:
+            return "glGetActiveUniformBlockName";
+        case EntryPoint::GLGetActiveUniformBlockiv:
+            return "glGetActiveUniformBlockiv";
+        case EntryPoint::GLGetActiveUniformBlockivRobustANGLE:
+            return "glGetActiveUniformBlockivRobustANGLE";
+        case EntryPoint::GLGetActiveUniformName:
+            return "glGetActiveUniformName";
+        case EntryPoint::GLGetActiveUniformsiv:
+            return "glGetActiveUniformsiv";
+        case EntryPoint::GLGetAttachedShaders:
+            return "glGetAttachedShaders";
+        case EntryPoint::GLGetAttribLocation:
+            return "glGetAttribLocation";
+        case EntryPoint::GLGetBooleani_v:
+            return "glGetBooleani_v";
+        case EntryPoint::GLGetBooleani_vRobustANGLE:
+            return "glGetBooleani_vRobustANGLE";
+        case EntryPoint::GLGetBooleanv:
+            return "glGetBooleanv";
+        case EntryPoint::GLGetBooleanvRobustANGLE:
+            return "glGetBooleanvRobustANGLE";
+        case EntryPoint::GLGetBufferParameteri64v:
+            return "glGetBufferParameteri64v";
+        case EntryPoint::GLGetBufferParameteri64vRobustANGLE:
+            return "glGetBufferParameteri64vRobustANGLE";
+        case EntryPoint::GLGetBufferParameteriv:
+            return "glGetBufferParameteriv";
+        case EntryPoint::GLGetBufferParameterivRobustANGLE:
+            return "glGetBufferParameterivRobustANGLE";
+        case EntryPoint::GLGetBufferPointerv:
+            return "glGetBufferPointerv";
+        case EntryPoint::GLGetBufferPointervOES:
+            return "glGetBufferPointervOES";
+        case EntryPoint::GLGetBufferPointervRobustANGLE:
+            return "glGetBufferPointervRobustANGLE";
+        case EntryPoint::GLGetBufferSubData:
+            return "glGetBufferSubData";
+        case EntryPoint::GLGetClipPlane:
+            return "glGetClipPlane";
+        case EntryPoint::GLGetClipPlanef:
+            return "glGetClipPlanef";
+        case EntryPoint::GLGetClipPlanex:
+            return "glGetClipPlanex";
+        case EntryPoint::GLGetCompressedTexImage:
+            return "glGetCompressedTexImage";
+        case EntryPoint::GLGetCompressedTexImageANGLE:
+            return "glGetCompressedTexImageANGLE";
+        case EntryPoint::GLGetCompressedTextureImage:
+            return "glGetCompressedTextureImage";
+        case EntryPoint::GLGetCompressedTextureSubImage:
+            return "glGetCompressedTextureSubImage";
+        case EntryPoint::GLGetDebugMessageLog:
+            return "glGetDebugMessageLog";
+        case EntryPoint::GLGetDebugMessageLogKHR:
+            return "glGetDebugMessageLogKHR";
+        case EntryPoint::GLGetDoublei_v:
+            return "glGetDoublei_v";
+        case EntryPoint::GLGetDoublev:
+            return "glGetDoublev";
+        case EntryPoint::GLGetError:
+            return "glGetError";
+        case EntryPoint::GLGetFenceivNV:
+            return "glGetFenceivNV";
+        case EntryPoint::GLGetFixedv:
+            return "glGetFixedv";
+        case EntryPoint::GLGetFloati_v:
+            return "glGetFloati_v";
+        case EntryPoint::GLGetFloatv:
+            return "glGetFloatv";
+        case EntryPoint::GLGetFloatvRobustANGLE:
+            return "glGetFloatvRobustANGLE";
+        case EntryPoint::GLGetFragDataIndex:
+            return "glGetFragDataIndex";
+        case EntryPoint::GLGetFragDataIndexEXT:
+            return "glGetFragDataIndexEXT";
+        case EntryPoint::GLGetFragDataLocation:
+            return "glGetFragDataLocation";
+        case EntryPoint::GLGetFramebufferAttachmentParameteriv:
+            return "glGetFramebufferAttachmentParameteriv";
+        case EntryPoint::GLGetFramebufferAttachmentParameterivOES:
+            return "glGetFramebufferAttachmentParameterivOES";
+        case EntryPoint::GLGetFramebufferAttachmentParameterivRobustANGLE:
+            return "glGetFramebufferAttachmentParameterivRobustANGLE";
+        case EntryPoint::GLGetFramebufferParameteriv:
+            return "glGetFramebufferParameteriv";
+        case EntryPoint::GLGetFramebufferParameterivMESA:
+            return "glGetFramebufferParameterivMESA";
+        case EntryPoint::GLGetFramebufferParameterivRobustANGLE:
+            return "glGetFramebufferParameterivRobustANGLE";
+        case EntryPoint::GLGetGraphicsResetStatus:
+            return "glGetGraphicsResetStatus";
+        case EntryPoint::GLGetGraphicsResetStatusEXT:
+            return "glGetGraphicsResetStatusEXT";
+        case EntryPoint::GLGetInteger64i_v:
+            return "glGetInteger64i_v";
+        case EntryPoint::GLGetInteger64i_vRobustANGLE:
+            return "glGetInteger64i_vRobustANGLE";
+        case EntryPoint::GLGetInteger64v:
+            return "glGetInteger64v";
+        case EntryPoint::GLGetInteger64vEXT:
+            return "glGetInteger64vEXT";
+        case EntryPoint::GLGetInteger64vRobustANGLE:
+            return "glGetInteger64vRobustANGLE";
+        case EntryPoint::GLGetIntegeri_v:
+            return "glGetIntegeri_v";
+        case EntryPoint::GLGetIntegeri_vRobustANGLE:
+            return "glGetIntegeri_vRobustANGLE";
+        case EntryPoint::GLGetIntegerv:
+            return "glGetIntegerv";
+        case EntryPoint::GLGetIntegervRobustANGLE:
+            return "glGetIntegervRobustANGLE";
+        case EntryPoint::GLGetInternalformati64v:
+            return "glGetInternalformati64v";
+        case EntryPoint::GLGetInternalformativ:
+            return "glGetInternalformativ";
+        case EntryPoint::GLGetInternalformativRobustANGLE:
+            return "glGetInternalformativRobustANGLE";
+        case EntryPoint::GLGetLightfv:
+            return "glGetLightfv";
+        case EntryPoint::GLGetLightiv:
+            return "glGetLightiv";
+        case EntryPoint::GLGetLightxv:
+            return "glGetLightxv";
+        case EntryPoint::GLGetMapdv:
+            return "glGetMapdv";
+        case EntryPoint::GLGetMapfv:
+            return "glGetMapfv";
+        case EntryPoint::GLGetMapiv:
+            return "glGetMapiv";
+        case EntryPoint::GLGetMaterialfv:
+            return "glGetMaterialfv";
+        case EntryPoint::GLGetMaterialiv:
+            return "glGetMaterialiv";
+        case EntryPoint::GLGetMaterialxv:
+            return "glGetMaterialxv";
+        case EntryPoint::GLGetMemoryObjectParameterivEXT:
+            return "glGetMemoryObjectParameterivEXT";
+        case EntryPoint::GLGetMultisamplefv:
+            return "glGetMultisamplefv";
+        case EntryPoint::GLGetMultisamplefvANGLE:
+            return "glGetMultisamplefvANGLE";
+        case EntryPoint::GLGetMultisamplefvRobustANGLE:
+            return "glGetMultisamplefvRobustANGLE";
+        case EntryPoint::GLGetNamedBufferParameteri64v:
+            return "glGetNamedBufferParameteri64v";
+        case EntryPoint::GLGetNamedBufferParameteriv:
+            return "glGetNamedBufferParameteriv";
+        case EntryPoint::GLGetNamedBufferPointerv:
+            return "glGetNamedBufferPointerv";
+        case EntryPoint::GLGetNamedBufferSubData:
+            return "glGetNamedBufferSubData";
+        case EntryPoint::GLGetNamedFramebufferAttachmentParameteriv:
+            return "glGetNamedFramebufferAttachmentParameteriv";
+        case EntryPoint::GLGetNamedFramebufferParameteriv:
+            return "glGetNamedFramebufferParameteriv";
+        case EntryPoint::GLGetNamedRenderbufferParameteriv:
+            return "glGetNamedRenderbufferParameteriv";
+        case EntryPoint::GLGetObjectLabel:
+            return "glGetObjectLabel";
+        case EntryPoint::GLGetObjectLabelEXT:
+            return "glGetObjectLabelEXT";
+        case EntryPoint::GLGetObjectLabelKHR:
+            return "glGetObjectLabelKHR";
+        case EntryPoint::GLGetObjectPtrLabel:
+            return "glGetObjectPtrLabel";
+        case EntryPoint::GLGetObjectPtrLabelKHR:
+            return "glGetObjectPtrLabelKHR";
+        case EntryPoint::GLGetPerfMonitorCounterDataAMD:
+            return "glGetPerfMonitorCounterDataAMD";
+        case EntryPoint::GLGetPerfMonitorCounterInfoAMD:
+            return "glGetPerfMonitorCounterInfoAMD";
+        case EntryPoint::GLGetPerfMonitorCounterStringAMD:
+            return "glGetPerfMonitorCounterStringAMD";
+        case EntryPoint::GLGetPerfMonitorCountersAMD:
+            return "glGetPerfMonitorCountersAMD";
+        case EntryPoint::GLGetPerfMonitorGroupStringAMD:
+            return "glGetPerfMonitorGroupStringAMD";
+        case EntryPoint::GLGetPerfMonitorGroupsAMD:
+            return "glGetPerfMonitorGroupsAMD";
+        case EntryPoint::GLGetPixelMapfv:
+            return "glGetPixelMapfv";
+        case EntryPoint::GLGetPixelMapuiv:
+            return "glGetPixelMapuiv";
+        case EntryPoint::GLGetPixelMapusv:
+            return "glGetPixelMapusv";
+        case EntryPoint::GLGetPointerv:
+            return "glGetPointerv";
+        case EntryPoint::GLGetPointervKHR:
+            return "glGetPointervKHR";
+        case EntryPoint::GLGetPointervRobustANGLERobustANGLE:
+            return "glGetPointervRobustANGLERobustANGLE";
+        case EntryPoint::GLGetPolygonStipple:
+            return "glGetPolygonStipple";
+        case EntryPoint::GLGetProgramBinary:
+            return "glGetProgramBinary";
+        case EntryPoint::GLGetProgramBinaryOES:
+            return "glGetProgramBinaryOES";
+        case EntryPoint::GLGetProgramInfoLog:
+            return "glGetProgramInfoLog";
+        case EntryPoint::GLGetProgramInterfaceiv:
+            return "glGetProgramInterfaceiv";
+        case EntryPoint::GLGetProgramInterfaceivRobustANGLE:
+            return "glGetProgramInterfaceivRobustANGLE";
+        case EntryPoint::GLGetProgramPipelineInfoLog:
+            return "glGetProgramPipelineInfoLog";
+        case EntryPoint::GLGetProgramPipelineInfoLogEXT:
+            return "glGetProgramPipelineInfoLogEXT";
+        case EntryPoint::GLGetProgramPipelineiv:
+            return "glGetProgramPipelineiv";
+        case EntryPoint::GLGetProgramPipelineivEXT:
+            return "glGetProgramPipelineivEXT";
+        case EntryPoint::GLGetProgramResourceIndex:
+            return "glGetProgramResourceIndex";
+        case EntryPoint::GLGetProgramResourceLocation:
+            return "glGetProgramResourceLocation";
+        case EntryPoint::GLGetProgramResourceLocationIndex:
+            return "glGetProgramResourceLocationIndex";
+        case EntryPoint::GLGetProgramResourceLocationIndexEXT:
+            return "glGetProgramResourceLocationIndexEXT";
+        case EntryPoint::GLGetProgramResourceName:
+            return "glGetProgramResourceName";
+        case EntryPoint::GLGetProgramResourceiv:
+            return "glGetProgramResourceiv";
+        case EntryPoint::GLGetProgramStageiv:
+            return "glGetProgramStageiv";
+        case EntryPoint::GLGetProgramiv:
+            return "glGetProgramiv";
+        case EntryPoint::GLGetProgramivRobustANGLE:
+            return "glGetProgramivRobustANGLE";
+        case EntryPoint::GLGetQueryBufferObjecti64v:
+            return "glGetQueryBufferObjecti64v";
+        case EntryPoint::GLGetQueryBufferObjectiv:
+            return "glGetQueryBufferObjectiv";
+        case EntryPoint::GLGetQueryBufferObjectui64v:
+            return "glGetQueryBufferObjectui64v";
+        case EntryPoint::GLGetQueryBufferObjectuiv:
+            return "glGetQueryBufferObjectuiv";
+        case EntryPoint::GLGetQueryIndexediv:
+            return "glGetQueryIndexediv";
+        case EntryPoint::GLGetQueryObjecti64v:
+            return "glGetQueryObjecti64v";
+        case EntryPoint::GLGetQueryObjecti64vEXT:
+            return "glGetQueryObjecti64vEXT";
+        case EntryPoint::GLGetQueryObjecti64vRobustANGLE:
+            return "glGetQueryObjecti64vRobustANGLE";
+        case EntryPoint::GLGetQueryObjectiv:
+            return "glGetQueryObjectiv";
+        case EntryPoint::GLGetQueryObjectivEXT:
+            return "glGetQueryObjectivEXT";
+        case EntryPoint::GLGetQueryObjectivRobustANGLE:
+            return "glGetQueryObjectivRobustANGLE";
+        case EntryPoint::GLGetQueryObjectui64v:
+            return "glGetQueryObjectui64v";
+        case EntryPoint::GLGetQueryObjectui64vEXT:
+            return "glGetQueryObjectui64vEXT";
+        case EntryPoint::GLGetQueryObjectui64vRobustANGLE:
+            return "glGetQueryObjectui64vRobustANGLE";
+        case EntryPoint::GLGetQueryObjectuiv:
+            return "glGetQueryObjectuiv";
+        case EntryPoint::GLGetQueryObjectuivEXT:
+            return "glGetQueryObjectuivEXT";
+        case EntryPoint::GLGetQueryObjectuivRobustANGLE:
+            return "glGetQueryObjectuivRobustANGLE";
+        case EntryPoint::GLGetQueryiv:
+            return "glGetQueryiv";
+        case EntryPoint::GLGetQueryivEXT:
+            return "glGetQueryivEXT";
+        case EntryPoint::GLGetQueryivRobustANGLE:
+            return "glGetQueryivRobustANGLE";
+        case EntryPoint::GLGetRenderbufferImageANGLE:
+            return "glGetRenderbufferImageANGLE";
+        case EntryPoint::GLGetRenderbufferParameteriv:
+            return "glGetRenderbufferParameteriv";
+        case EntryPoint::GLGetRenderbufferParameterivOES:
+            return "glGetRenderbufferParameterivOES";
+        case EntryPoint::GLGetRenderbufferParameterivRobustANGLE:
+            return "glGetRenderbufferParameterivRobustANGLE";
+        case EntryPoint::GLGetSamplerParameterIiv:
+            return "glGetSamplerParameterIiv";
+        case EntryPoint::GLGetSamplerParameterIivEXT:
+            return "glGetSamplerParameterIivEXT";
+        case EntryPoint::GLGetSamplerParameterIivOES:
+            return "glGetSamplerParameterIivOES";
+        case EntryPoint::GLGetSamplerParameterIivRobustANGLE:
+            return "glGetSamplerParameterIivRobustANGLE";
+        case EntryPoint::GLGetSamplerParameterIuiv:
+            return "glGetSamplerParameterIuiv";
+        case EntryPoint::GLGetSamplerParameterIuivEXT:
+            return "glGetSamplerParameterIuivEXT";
+        case EntryPoint::GLGetSamplerParameterIuivOES:
+            return "glGetSamplerParameterIuivOES";
+        case EntryPoint::GLGetSamplerParameterIuivRobustANGLE:
+            return "glGetSamplerParameterIuivRobustANGLE";
+        case EntryPoint::GLGetSamplerParameterfv:
+            return "glGetSamplerParameterfv";
+        case EntryPoint::GLGetSamplerParameterfvRobustANGLE:
+            return "glGetSamplerParameterfvRobustANGLE";
+        case EntryPoint::GLGetSamplerParameteriv:
+            return "glGetSamplerParameteriv";
+        case EntryPoint::GLGetSamplerParameterivRobustANGLE:
+            return "glGetSamplerParameterivRobustANGLE";
+        case EntryPoint::GLGetSemaphoreParameterui64vEXT:
+            return "glGetSemaphoreParameterui64vEXT";
+        case EntryPoint::GLGetShaderInfoLog:
+            return "glGetShaderInfoLog";
+        case EntryPoint::GLGetShaderPrecisionFormat:
+            return "glGetShaderPrecisionFormat";
+        case EntryPoint::GLGetShaderSource:
+            return "glGetShaderSource";
+        case EntryPoint::GLGetShaderiv:
+            return "glGetShaderiv";
+        case EntryPoint::GLGetShaderivRobustANGLE:
+            return "glGetShaderivRobustANGLE";
+        case EntryPoint::GLGetString:
+            return "glGetString";
+        case EntryPoint::GLGetStringi:
+            return "glGetStringi";
+        case EntryPoint::GLGetSubroutineIndex:
+            return "glGetSubroutineIndex";
+        case EntryPoint::GLGetSubroutineUniformLocation:
+            return "glGetSubroutineUniformLocation";
+        case EntryPoint::GLGetSynciv:
+            return "glGetSynciv";
+        case EntryPoint::GLGetTexEnvfv:
+            return "glGetTexEnvfv";
+        case EntryPoint::GLGetTexEnviv:
+            return "glGetTexEnviv";
+        case EntryPoint::GLGetTexEnvxv:
+            return "glGetTexEnvxv";
+        case EntryPoint::GLGetTexGendv:
+            return "glGetTexGendv";
+        case EntryPoint::GLGetTexGenfv:
+            return "glGetTexGenfv";
+        case EntryPoint::GLGetTexGenfvOES:
+            return "glGetTexGenfvOES";
+        case EntryPoint::GLGetTexGeniv:
+            return "glGetTexGeniv";
+        case EntryPoint::GLGetTexGenivOES:
+            return "glGetTexGenivOES";
+        case EntryPoint::GLGetTexGenxvOES:
+            return "glGetTexGenxvOES";
+        case EntryPoint::GLGetTexImage:
+            return "glGetTexImage";
+        case EntryPoint::GLGetTexImageANGLE:
+            return "glGetTexImageANGLE";
+        case EntryPoint::GLGetTexLevelParameterfv:
+            return "glGetTexLevelParameterfv";
+        case EntryPoint::GLGetTexLevelParameterfvANGLE:
+            return "glGetTexLevelParameterfvANGLE";
+        case EntryPoint::GLGetTexLevelParameterfvRobustANGLE:
+            return "glGetTexLevelParameterfvRobustANGLE";
+        case EntryPoint::GLGetTexLevelParameteriv:
+            return "glGetTexLevelParameteriv";
+        case EntryPoint::GLGetTexLevelParameterivANGLE:
+            return "glGetTexLevelParameterivANGLE";
+        case EntryPoint::GLGetTexLevelParameterivRobustANGLE:
+            return "glGetTexLevelParameterivRobustANGLE";
+        case EntryPoint::GLGetTexParameterIiv:
+            return "glGetTexParameterIiv";
+        case EntryPoint::GLGetTexParameterIivEXT:
+            return "glGetTexParameterIivEXT";
+        case EntryPoint::GLGetTexParameterIivOES:
+            return "glGetTexParameterIivOES";
+        case EntryPoint::GLGetTexParameterIivRobustANGLE:
+            return "glGetTexParameterIivRobustANGLE";
+        case EntryPoint::GLGetTexParameterIuiv:
+            return "glGetTexParameterIuiv";
+        case EntryPoint::GLGetTexParameterIuivEXT:
+            return "glGetTexParameterIuivEXT";
+        case EntryPoint::GLGetTexParameterIuivOES:
+            return "glGetTexParameterIuivOES";
+        case EntryPoint::GLGetTexParameterIuivRobustANGLE:
+            return "glGetTexParameterIuivRobustANGLE";
+        case EntryPoint::GLGetTexParameterfv:
+            return "glGetTexParameterfv";
+        case EntryPoint::GLGetTexParameterfvRobustANGLE:
+            return "glGetTexParameterfvRobustANGLE";
+        case EntryPoint::GLGetTexParameteriv:
+            return "glGetTexParameteriv";
+        case EntryPoint::GLGetTexParameterivRobustANGLE:
+            return "glGetTexParameterivRobustANGLE";
+        case EntryPoint::GLGetTexParameterxv:
+            return "glGetTexParameterxv";
+        case EntryPoint::GLGetTextureImage:
+            return "glGetTextureImage";
+        case EntryPoint::GLGetTextureLevelParameterfv:
+            return "glGetTextureLevelParameterfv";
+        case EntryPoint::GLGetTextureLevelParameteriv:
+            return "glGetTextureLevelParameteriv";
+        case EntryPoint::GLGetTextureParameterIiv:
+            return "glGetTextureParameterIiv";
+        case EntryPoint::GLGetTextureParameterIuiv:
+            return "glGetTextureParameterIuiv";
+        case EntryPoint::GLGetTextureParameterfv:
+            return "glGetTextureParameterfv";
+        case EntryPoint::GLGetTextureParameteriv:
+            return "glGetTextureParameteriv";
+        case EntryPoint::GLGetTextureSubImage:
+            return "glGetTextureSubImage";
+        case EntryPoint::GLGetTransformFeedbackVarying:
+            return "glGetTransformFeedbackVarying";
+        case EntryPoint::GLGetTransformFeedbacki64_v:
+            return "glGetTransformFeedbacki64_v";
+        case EntryPoint::GLGetTransformFeedbacki_v:
+            return "glGetTransformFeedbacki_v";
+        case EntryPoint::GLGetTransformFeedbackiv:
+            return "glGetTransformFeedbackiv";
+        case EntryPoint::GLGetTranslatedShaderSourceANGLE:
+            return "glGetTranslatedShaderSourceANGLE";
+        case EntryPoint::GLGetUniformBlockIndex:
+            return "glGetUniformBlockIndex";
+        case EntryPoint::GLGetUniformIndices:
+            return "glGetUniformIndices";
+        case EntryPoint::GLGetUniformLocation:
+            return "glGetUniformLocation";
+        case EntryPoint::GLGetUniformSubroutineuiv:
+            return "glGetUniformSubroutineuiv";
+        case EntryPoint::GLGetUniformdv:
+            return "glGetUniformdv";
+        case EntryPoint::GLGetUniformfv:
+            return "glGetUniformfv";
+        case EntryPoint::GLGetUniformfvRobustANGLE:
+            return "glGetUniformfvRobustANGLE";
+        case EntryPoint::GLGetUniformiv:
+            return "glGetUniformiv";
+        case EntryPoint::GLGetUniformivRobustANGLE:
+            return "glGetUniformivRobustANGLE";
+        case EntryPoint::GLGetUniformuiv:
+            return "glGetUniformuiv";
+        case EntryPoint::GLGetUniformuivRobustANGLE:
+            return "glGetUniformuivRobustANGLE";
+        case EntryPoint::GLGetUnsignedBytei_vEXT:
+            return "glGetUnsignedBytei_vEXT";
+        case EntryPoint::GLGetUnsignedBytevEXT:
+            return "glGetUnsignedBytevEXT";
+        case EntryPoint::GLGetVertexArrayIndexed64iv:
+            return "glGetVertexArrayIndexed64iv";
+        case EntryPoint::GLGetVertexArrayIndexediv:
+            return "glGetVertexArrayIndexediv";
+        case EntryPoint::GLGetVertexArrayiv:
+            return "glGetVertexArrayiv";
+        case EntryPoint::GLGetVertexAttribIiv:
+            return "glGetVertexAttribIiv";
+        case EntryPoint::GLGetVertexAttribIivRobustANGLE:
+            return "glGetVertexAttribIivRobustANGLE";
+        case EntryPoint::GLGetVertexAttribIuiv:
+            return "glGetVertexAttribIuiv";
+        case EntryPoint::GLGetVertexAttribIuivRobustANGLE:
+            return "glGetVertexAttribIuivRobustANGLE";
+        case EntryPoint::GLGetVertexAttribLdv:
+            return "glGetVertexAttribLdv";
+        case EntryPoint::GLGetVertexAttribPointerv:
+            return "glGetVertexAttribPointerv";
+        case EntryPoint::GLGetVertexAttribPointervRobustANGLE:
+            return "glGetVertexAttribPointervRobustANGLE";
+        case EntryPoint::GLGetVertexAttribdv:
+            return "glGetVertexAttribdv";
+        case EntryPoint::GLGetVertexAttribfv:
+            return "glGetVertexAttribfv";
+        case EntryPoint::GLGetVertexAttribfvRobustANGLE:
+            return "glGetVertexAttribfvRobustANGLE";
+        case EntryPoint::GLGetVertexAttribiv:
+            return "glGetVertexAttribiv";
+        case EntryPoint::GLGetVertexAttribivRobustANGLE:
+            return "glGetVertexAttribivRobustANGLE";
+        case EntryPoint::GLGetnColorTable:
+            return "glGetnColorTable";
+        case EntryPoint::GLGetnCompressedTexImage:
+            return "glGetnCompressedTexImage";
+        case EntryPoint::GLGetnConvolutionFilter:
+            return "glGetnConvolutionFilter";
+        case EntryPoint::GLGetnHistogram:
+            return "glGetnHistogram";
+        case EntryPoint::GLGetnMapdv:
+            return "glGetnMapdv";
+        case EntryPoint::GLGetnMapfv:
+            return "glGetnMapfv";
+        case EntryPoint::GLGetnMapiv:
+            return "glGetnMapiv";
+        case EntryPoint::GLGetnMinmax:
+            return "glGetnMinmax";
+        case EntryPoint::GLGetnPixelMapfv:
+            return "glGetnPixelMapfv";
+        case EntryPoint::GLGetnPixelMapuiv:
+            return "glGetnPixelMapuiv";
+        case EntryPoint::GLGetnPixelMapusv:
+            return "glGetnPixelMapusv";
+        case EntryPoint::GLGetnPolygonStipple:
+            return "glGetnPolygonStipple";
+        case EntryPoint::GLGetnSeparableFilter:
+            return "glGetnSeparableFilter";
+        case EntryPoint::GLGetnTexImage:
+            return "glGetnTexImage";
+        case EntryPoint::GLGetnUniformdv:
+            return "glGetnUniformdv";
+        case EntryPoint::GLGetnUniformfv:
+            return "glGetnUniformfv";
+        case EntryPoint::GLGetnUniformfvEXT:
+            return "glGetnUniformfvEXT";
+        case EntryPoint::GLGetnUniformfvRobustANGLE:
+            return "glGetnUniformfvRobustANGLE";
+        case EntryPoint::GLGetnUniformiv:
+            return "glGetnUniformiv";
+        case EntryPoint::GLGetnUniformivEXT:
+            return "glGetnUniformivEXT";
+        case EntryPoint::GLGetnUniformivRobustANGLE:
+            return "glGetnUniformivRobustANGLE";
+        case EntryPoint::GLGetnUniformuiv:
+            return "glGetnUniformuiv";
+        case EntryPoint::GLGetnUniformuivRobustANGLE:
+            return "glGetnUniformuivRobustANGLE";
+        case EntryPoint::GLHint:
+            return "glHint";
+        case EntryPoint::GLImportMemoryFdEXT:
+            return "glImportMemoryFdEXT";
+        case EntryPoint::GLImportMemoryZirconHandleANGLE:
+            return "glImportMemoryZirconHandleANGLE";
+        case EntryPoint::GLImportSemaphoreFdEXT:
+            return "glImportSemaphoreFdEXT";
+        case EntryPoint::GLImportSemaphoreZirconHandleANGLE:
+            return "glImportSemaphoreZirconHandleANGLE";
+        case EntryPoint::GLIndexMask:
+            return "glIndexMask";
+        case EntryPoint::GLIndexPointer:
+            return "glIndexPointer";
+        case EntryPoint::GLIndexd:
+            return "glIndexd";
+        case EntryPoint::GLIndexdv:
+            return "glIndexdv";
+        case EntryPoint::GLIndexf:
+            return "glIndexf";
+        case EntryPoint::GLIndexfv:
+            return "glIndexfv";
+        case EntryPoint::GLIndexi:
+            return "glIndexi";
+        case EntryPoint::GLIndexiv:
+            return "glIndexiv";
+        case EntryPoint::GLIndexs:
+            return "glIndexs";
+        case EntryPoint::GLIndexsv:
+            return "glIndexsv";
+        case EntryPoint::GLIndexub:
+            return "glIndexub";
+        case EntryPoint::GLIndexubv:
+            return "glIndexubv";
+        case EntryPoint::GLInitNames:
+            return "glInitNames";
+        case EntryPoint::GLInsertEventMarkerEXT:
+            return "glInsertEventMarkerEXT";
+        case EntryPoint::GLInterleavedArrays:
+            return "glInterleavedArrays";
+        case EntryPoint::GLInvalid:
+            return "glInvalid";
+        case EntryPoint::GLInvalidateBufferData:
+            return "glInvalidateBufferData";
+        case EntryPoint::GLInvalidateBufferSubData:
+            return "glInvalidateBufferSubData";
+        case EntryPoint::GLInvalidateFramebuffer:
+            return "glInvalidateFramebuffer";
+        case EntryPoint::GLInvalidateNamedFramebufferData:
+            return "glInvalidateNamedFramebufferData";
+        case EntryPoint::GLInvalidateNamedFramebufferSubData:
+            return "glInvalidateNamedFramebufferSubData";
+        case EntryPoint::GLInvalidateSubFramebuffer:
+            return "glInvalidateSubFramebuffer";
+        case EntryPoint::GLInvalidateTexImage:
+            return "glInvalidateTexImage";
+        case EntryPoint::GLInvalidateTexSubImage:
+            return "glInvalidateTexSubImage";
+        case EntryPoint::GLInvalidateTextureANGLE:
+            return "glInvalidateTextureANGLE";
+        case EntryPoint::GLIsBuffer:
+            return "glIsBuffer";
+        case EntryPoint::GLIsEnabled:
+            return "glIsEnabled";
+        case EntryPoint::GLIsEnabledi:
+            return "glIsEnabledi";
+        case EntryPoint::GLIsEnablediEXT:
+            return "glIsEnablediEXT";
+        case EntryPoint::GLIsEnablediOES:
+            return "glIsEnablediOES";
+        case EntryPoint::GLIsFenceNV:
+            return "glIsFenceNV";
+        case EntryPoint::GLIsFramebuffer:
+            return "glIsFramebuffer";
+        case EntryPoint::GLIsFramebufferOES:
+            return "glIsFramebufferOES";
+        case EntryPoint::GLIsList:
+            return "glIsList";
+        case EntryPoint::GLIsMemoryObjectEXT:
+            return "glIsMemoryObjectEXT";
+        case EntryPoint::GLIsProgram:
+            return "glIsProgram";
+        case EntryPoint::GLIsProgramPipeline:
+            return "glIsProgramPipeline";
+        case EntryPoint::GLIsProgramPipelineEXT:
+            return "glIsProgramPipelineEXT";
+        case EntryPoint::GLIsQuery:
+            return "glIsQuery";
+        case EntryPoint::GLIsQueryEXT:
+            return "glIsQueryEXT";
+        case EntryPoint::GLIsRenderbuffer:
+            return "glIsRenderbuffer";
+        case EntryPoint::GLIsRenderbufferOES:
+            return "glIsRenderbufferOES";
+        case EntryPoint::GLIsSampler:
+            return "glIsSampler";
+        case EntryPoint::GLIsSemaphoreEXT:
+            return "glIsSemaphoreEXT";
+        case EntryPoint::GLIsShader:
+            return "glIsShader";
+        case EntryPoint::GLIsSync:
+            return "glIsSync";
+        case EntryPoint::GLIsTexture:
+            return "glIsTexture";
+        case EntryPoint::GLIsTransformFeedback:
+            return "glIsTransformFeedback";
+        case EntryPoint::GLIsVertexArray:
+            return "glIsVertexArray";
+        case EntryPoint::GLIsVertexArrayOES:
+            return "glIsVertexArrayOES";
+        case EntryPoint::GLLabelObjectEXT:
+            return "glLabelObjectEXT";
+        case EntryPoint::GLLightModelf:
+            return "glLightModelf";
+        case EntryPoint::GLLightModelfv:
+            return "glLightModelfv";
+        case EntryPoint::GLLightModeli:
+            return "glLightModeli";
+        case EntryPoint::GLLightModeliv:
+            return "glLightModeliv";
+        case EntryPoint::GLLightModelx:
+            return "glLightModelx";
+        case EntryPoint::GLLightModelxv:
+            return "glLightModelxv";
+        case EntryPoint::GLLightf:
+            return "glLightf";
+        case EntryPoint::GLLightfv:
+            return "glLightfv";
+        case EntryPoint::GLLighti:
+            return "glLighti";
+        case EntryPoint::GLLightiv:
+            return "glLightiv";
+        case EntryPoint::GLLightx:
+            return "glLightx";
+        case EntryPoint::GLLightxv:
+            return "glLightxv";
+        case EntryPoint::GLLineStipple:
+            return "glLineStipple";
+        case EntryPoint::GLLineWidth:
+            return "glLineWidth";
+        case EntryPoint::GLLineWidthx:
+            return "glLineWidthx";
+        case EntryPoint::GLLinkProgram:
+            return "glLinkProgram";
+        case EntryPoint::GLListBase:
+            return "glListBase";
+        case EntryPoint::GLLoadIdentity:
+            return "glLoadIdentity";
+        case EntryPoint::GLLoadMatrixd:
+            return "glLoadMatrixd";
+        case EntryPoint::GLLoadMatrixf:
+            return "glLoadMatrixf";
+        case EntryPoint::GLLoadMatrixx:
+            return "glLoadMatrixx";
+        case EntryPoint::GLLoadName:
+            return "glLoadName";
+        case EntryPoint::GLLoadPaletteFromModelViewMatrixOES:
+            return "glLoadPaletteFromModelViewMatrixOES";
+        case EntryPoint::GLLoadTransposeMatrixd:
+            return "glLoadTransposeMatrixd";
+        case EntryPoint::GLLoadTransposeMatrixf:
+            return "glLoadTransposeMatrixf";
+        case EntryPoint::GLLogicOp:
+            return "glLogicOp";
+        case EntryPoint::GLLogicOpANGLE:
+            return "glLogicOpANGLE";
+        case EntryPoint::GLLoseContextCHROMIUM:
+            return "glLoseContextCHROMIUM";
+        case EntryPoint::GLMap1d:
+            return "glMap1d";
+        case EntryPoint::GLMap1f:
+            return "glMap1f";
+        case EntryPoint::GLMap2d:
+            return "glMap2d";
+        case EntryPoint::GLMap2f:
+            return "glMap2f";
+        case EntryPoint::GLMapBuffer:
+            return "glMapBuffer";
+        case EntryPoint::GLMapBufferOES:
+            return "glMapBufferOES";
+        case EntryPoint::GLMapBufferRange:
+            return "glMapBufferRange";
+        case EntryPoint::GLMapBufferRangeEXT:
+            return "glMapBufferRangeEXT";
+        case EntryPoint::GLMapGrid1d:
+            return "glMapGrid1d";
+        case EntryPoint::GLMapGrid1f:
+            return "glMapGrid1f";
+        case EntryPoint::GLMapGrid2d:
+            return "glMapGrid2d";
+        case EntryPoint::GLMapGrid2f:
+            return "glMapGrid2f";
+        case EntryPoint::GLMapNamedBuffer:
+            return "glMapNamedBuffer";
+        case EntryPoint::GLMapNamedBufferRange:
+            return "glMapNamedBufferRange";
+        case EntryPoint::GLMaterialf:
+            return "glMaterialf";
+        case EntryPoint::GLMaterialfv:
+            return "glMaterialfv";
+        case EntryPoint::GLMateriali:
+            return "glMateriali";
+        case EntryPoint::GLMaterialiv:
+            return "glMaterialiv";
+        case EntryPoint::GLMaterialx:
+            return "glMaterialx";
+        case EntryPoint::GLMaterialxv:
+            return "glMaterialxv";
+        case EntryPoint::GLMatrixIndexPointerOES:
+            return "glMatrixIndexPointerOES";
+        case EntryPoint::GLMatrixMode:
+            return "glMatrixMode";
+        case EntryPoint::GLMaxShaderCompilerThreadsKHR:
+            return "glMaxShaderCompilerThreadsKHR";
+        case EntryPoint::GLMemoryBarrier:
+            return "glMemoryBarrier";
+        case EntryPoint::GLMemoryBarrierByRegion:
+            return "glMemoryBarrierByRegion";
+        case EntryPoint::GLMemoryObjectParameterivEXT:
+            return "glMemoryObjectParameterivEXT";
+        case EntryPoint::GLMinSampleShading:
+            return "glMinSampleShading";
+        case EntryPoint::GLMinSampleShadingOES:
+            return "glMinSampleShadingOES";
+        case EntryPoint::GLMultMatrixd:
+            return "glMultMatrixd";
+        case EntryPoint::GLMultMatrixf:
+            return "glMultMatrixf";
+        case EntryPoint::GLMultMatrixx:
+            return "glMultMatrixx";
+        case EntryPoint::GLMultTransposeMatrixd:
+            return "glMultTransposeMatrixd";
+        case EntryPoint::GLMultTransposeMatrixf:
+            return "glMultTransposeMatrixf";
+        case EntryPoint::GLMultiDrawArrays:
+            return "glMultiDrawArrays";
+        case EntryPoint::GLMultiDrawArraysANGLE:
+            return "glMultiDrawArraysANGLE";
+        case EntryPoint::GLMultiDrawArraysIndirect:
+            return "glMultiDrawArraysIndirect";
+        case EntryPoint::GLMultiDrawArraysIndirectCount:
+            return "glMultiDrawArraysIndirectCount";
+        case EntryPoint::GLMultiDrawArraysIndirectEXT:
+            return "glMultiDrawArraysIndirectEXT";
+        case EntryPoint::GLMultiDrawArraysInstancedANGLE:
+            return "glMultiDrawArraysInstancedANGLE";
+        case EntryPoint::GLMultiDrawArraysInstancedBaseInstanceANGLE:
+            return "glMultiDrawArraysInstancedBaseInstanceANGLE";
+        case EntryPoint::GLMultiDrawElements:
+            return "glMultiDrawElements";
+        case EntryPoint::GLMultiDrawElementsANGLE:
+            return "glMultiDrawElementsANGLE";
+        case EntryPoint::GLMultiDrawElementsBaseVertex:
+            return "glMultiDrawElementsBaseVertex";
+        case EntryPoint::GLMultiDrawElementsBaseVertexEXT:
+            return "glMultiDrawElementsBaseVertexEXT";
+        case EntryPoint::GLMultiDrawElementsIndirect:
+            return "glMultiDrawElementsIndirect";
+        case EntryPoint::GLMultiDrawElementsIndirectCount:
+            return "glMultiDrawElementsIndirectCount";
+        case EntryPoint::GLMultiDrawElementsIndirectEXT:
+            return "glMultiDrawElementsIndirectEXT";
+        case EntryPoint::GLMultiDrawElementsInstancedANGLE:
+            return "glMultiDrawElementsInstancedANGLE";
+        case EntryPoint::GLMultiDrawElementsInstancedBaseVertexBaseInstanceANGLE:
+            return "glMultiDrawElementsInstancedBaseVertexBaseInstanceANGLE";
+        case EntryPoint::GLMultiTexCoord1d:
+            return "glMultiTexCoord1d";
+        case EntryPoint::GLMultiTexCoord1dv:
+            return "glMultiTexCoord1dv";
+        case EntryPoint::GLMultiTexCoord1f:
+            return "glMultiTexCoord1f";
+        case EntryPoint::GLMultiTexCoord1fv:
+            return "glMultiTexCoord1fv";
+        case EntryPoint::GLMultiTexCoord1i:
+            return "glMultiTexCoord1i";
+        case EntryPoint::GLMultiTexCoord1iv:
+            return "glMultiTexCoord1iv";
+        case EntryPoint::GLMultiTexCoord1s:
+            return "glMultiTexCoord1s";
+        case EntryPoint::GLMultiTexCoord1sv:
+            return "glMultiTexCoord1sv";
+        case EntryPoint::GLMultiTexCoord2d:
+            return "glMultiTexCoord2d";
+        case EntryPoint::GLMultiTexCoord2dv:
+            return "glMultiTexCoord2dv";
+        case EntryPoint::GLMultiTexCoord2f:
+            return "glMultiTexCoord2f";
+        case EntryPoint::GLMultiTexCoord2fv:
+            return "glMultiTexCoord2fv";
+        case EntryPoint::GLMultiTexCoord2i:
+            return "glMultiTexCoord2i";
+        case EntryPoint::GLMultiTexCoord2iv:
+            return "glMultiTexCoord2iv";
+        case EntryPoint::GLMultiTexCoord2s:
+            return "glMultiTexCoord2s";
+        case EntryPoint::GLMultiTexCoord2sv:
+            return "glMultiTexCoord2sv";
+        case EntryPoint::GLMultiTexCoord3d:
+            return "glMultiTexCoord3d";
+        case EntryPoint::GLMultiTexCoord3dv:
+            return "glMultiTexCoord3dv";
+        case EntryPoint::GLMultiTexCoord3f:
+            return "glMultiTexCoord3f";
+        case EntryPoint::GLMultiTexCoord3fv:
+            return "glMultiTexCoord3fv";
+        case EntryPoint::GLMultiTexCoord3i:
+            return "glMultiTexCoord3i";
+        case EntryPoint::GLMultiTexCoord3iv:
+            return "glMultiTexCoord3iv";
+        case EntryPoint::GLMultiTexCoord3s:
+            return "glMultiTexCoord3s";
+        case EntryPoint::GLMultiTexCoord3sv:
+            return "glMultiTexCoord3sv";
+        case EntryPoint::GLMultiTexCoord4d:
+            return "glMultiTexCoord4d";
+        case EntryPoint::GLMultiTexCoord4dv:
+            return "glMultiTexCoord4dv";
+        case EntryPoint::GLMultiTexCoord4f:
+            return "glMultiTexCoord4f";
+        case EntryPoint::GLMultiTexCoord4fv:
+            return "glMultiTexCoord4fv";
+        case EntryPoint::GLMultiTexCoord4i:
+            return "glMultiTexCoord4i";
+        case EntryPoint::GLMultiTexCoord4iv:
+            return "glMultiTexCoord4iv";
+        case EntryPoint::GLMultiTexCoord4s:
+            return "glMultiTexCoord4s";
+        case EntryPoint::GLMultiTexCoord4sv:
+            return "glMultiTexCoord4sv";
+        case EntryPoint::GLMultiTexCoord4x:
+            return "glMultiTexCoord4x";
+        case EntryPoint::GLMultiTexCoordP1ui:
+            return "glMultiTexCoordP1ui";
+        case EntryPoint::GLMultiTexCoordP1uiv:
+            return "glMultiTexCoordP1uiv";
+        case EntryPoint::GLMultiTexCoordP2ui:
+            return "glMultiTexCoordP2ui";
+        case EntryPoint::GLMultiTexCoordP2uiv:
+            return "glMultiTexCoordP2uiv";
+        case EntryPoint::GLMultiTexCoordP3ui:
+            return "glMultiTexCoordP3ui";
+        case EntryPoint::GLMultiTexCoordP3uiv:
+            return "glMultiTexCoordP3uiv";
+        case EntryPoint::GLMultiTexCoordP4ui:
+            return "glMultiTexCoordP4ui";
+        case EntryPoint::GLMultiTexCoordP4uiv:
+            return "glMultiTexCoordP4uiv";
+        case EntryPoint::GLNamedBufferData:
+            return "glNamedBufferData";
+        case EntryPoint::GLNamedBufferStorage:
+            return "glNamedBufferStorage";
+        case EntryPoint::GLNamedBufferStorageExternalEXT:
+            return "glNamedBufferStorageExternalEXT";
+        case EntryPoint::GLNamedBufferSubData:
+            return "glNamedBufferSubData";
+        case EntryPoint::GLNamedFramebufferDrawBuffer:
+            return "glNamedFramebufferDrawBuffer";
+        case EntryPoint::GLNamedFramebufferDrawBuffers:
+            return "glNamedFramebufferDrawBuffers";
+        case EntryPoint::GLNamedFramebufferParameteri:
+            return "glNamedFramebufferParameteri";
+        case EntryPoint::GLNamedFramebufferReadBuffer:
+            return "glNamedFramebufferReadBuffer";
+        case EntryPoint::GLNamedFramebufferRenderbuffer:
+            return "glNamedFramebufferRenderbuffer";
+        case EntryPoint::GLNamedFramebufferTexture:
+            return "glNamedFramebufferTexture";
+        case EntryPoint::GLNamedFramebufferTextureLayer:
+            return "glNamedFramebufferTextureLayer";
+        case EntryPoint::GLNamedRenderbufferStorage:
+            return "glNamedRenderbufferStorage";
+        case EntryPoint::GLNamedRenderbufferStorageMultisample:
+            return "glNamedRenderbufferStorageMultisample";
+        case EntryPoint::GLNewList:
+            return "glNewList";
+        case EntryPoint::GLNormal3b:
+            return "glNormal3b";
+        case EntryPoint::GLNormal3bv:
+            return "glNormal3bv";
+        case EntryPoint::GLNormal3d:
+            return "glNormal3d";
+        case EntryPoint::GLNormal3dv:
+            return "glNormal3dv";
+        case EntryPoint::GLNormal3f:
+            return "glNormal3f";
+        case EntryPoint::GLNormal3fv:
+            return "glNormal3fv";
+        case EntryPoint::GLNormal3i:
+            return "glNormal3i";
+        case EntryPoint::GLNormal3iv:
+            return "glNormal3iv";
+        case EntryPoint::GLNormal3s:
+            return "glNormal3s";
+        case EntryPoint::GLNormal3sv:
+            return "glNormal3sv";
+        case EntryPoint::GLNormal3x:
+            return "glNormal3x";
+        case EntryPoint::GLNormalP3ui:
+            return "glNormalP3ui";
+        case EntryPoint::GLNormalP3uiv:
+            return "glNormalP3uiv";
+        case EntryPoint::GLNormalPointer:
+            return "glNormalPointer";
+        case EntryPoint::GLObjectLabel:
+            return "glObjectLabel";
+        case EntryPoint::GLObjectLabelKHR:
+            return "glObjectLabelKHR";
+        case EntryPoint::GLObjectPtrLabel:
+            return "glObjectPtrLabel";
+        case EntryPoint::GLObjectPtrLabelKHR:
+            return "glObjectPtrLabelKHR";
+        case EntryPoint::GLOrtho:
+            return "glOrtho";
+        case EntryPoint::GLOrthof:
+            return "glOrthof";
+        case EntryPoint::GLOrthox:
+            return "glOrthox";
+        case EntryPoint::GLPassThrough:
+            return "glPassThrough";
+        case EntryPoint::GLPatchParameterfv:
+            return "glPatchParameterfv";
+        case EntryPoint::GLPatchParameteri:
+            return "glPatchParameteri";
+        case EntryPoint::GLPatchParameteriEXT:
+            return "glPatchParameteriEXT";
+        case EntryPoint::GLPauseTransformFeedback:
+            return "glPauseTransformFeedback";
+        case EntryPoint::GLPixelLocalStorageBarrierANGLE:
+            return "glPixelLocalStorageBarrierANGLE";
+        case EntryPoint::GLPixelMapfv:
+            return "glPixelMapfv";
+        case EntryPoint::GLPixelMapuiv:
+            return "glPixelMapuiv";
+        case EntryPoint::GLPixelMapusv:
+            return "glPixelMapusv";
+        case EntryPoint::GLPixelStoref:
+            return "glPixelStoref";
+        case EntryPoint::GLPixelStorei:
+            return "glPixelStorei";
+        case EntryPoint::GLPixelTransferf:
+            return "glPixelTransferf";
+        case EntryPoint::GLPixelTransferi:
+            return "glPixelTransferi";
+        case EntryPoint::GLPixelZoom:
+            return "glPixelZoom";
+        case EntryPoint::GLPointParameterf:
+            return "glPointParameterf";
+        case EntryPoint::GLPointParameterfv:
+            return "glPointParameterfv";
+        case EntryPoint::GLPointParameteri:
+            return "glPointParameteri";
+        case EntryPoint::GLPointParameteriv:
+            return "glPointParameteriv";
+        case EntryPoint::GLPointParameterx:
+            return "glPointParameterx";
+        case EntryPoint::GLPointParameterxv:
+            return "glPointParameterxv";
+        case EntryPoint::GLPointSize:
+            return "glPointSize";
+        case EntryPoint::GLPointSizePointerOES:
+            return "glPointSizePointerOES";
+        case EntryPoint::GLPointSizex:
+            return "glPointSizex";
+        case EntryPoint::GLPolygonMode:
+            return "glPolygonMode";
+        case EntryPoint::GLPolygonOffset:
+            return "glPolygonOffset";
+        case EntryPoint::GLPolygonOffsetClamp:
+            return "glPolygonOffsetClamp";
+        case EntryPoint::GLPolygonOffsetx:
+            return "glPolygonOffsetx";
+        case EntryPoint::GLPolygonStipple:
+            return "glPolygonStipple";
+        case EntryPoint::GLPopAttrib:
+            return "glPopAttrib";
+        case EntryPoint::GLPopClientAttrib:
+            return "glPopClientAttrib";
+        case EntryPoint::GLPopDebugGroup:
+            return "glPopDebugGroup";
+        case EntryPoint::GLPopDebugGroupKHR:
+            return "glPopDebugGroupKHR";
+        case EntryPoint::GLPopGroupMarkerEXT:
+            return "glPopGroupMarkerEXT";
+        case EntryPoint::GLPopMatrix:
+            return "glPopMatrix";
+        case EntryPoint::GLPopName:
+            return "glPopName";
+        case EntryPoint::GLPrimitiveBoundingBox:
+            return "glPrimitiveBoundingBox";
+        case EntryPoint::GLPrimitiveBoundingBoxEXT:
+            return "glPrimitiveBoundingBoxEXT";
+        case EntryPoint::GLPrimitiveBoundingBoxOES:
+            return "glPrimitiveBoundingBoxOES";
+        case EntryPoint::GLPrimitiveRestartIndex:
+            return "glPrimitiveRestartIndex";
+        case EntryPoint::GLPrioritizeTextures:
+            return "glPrioritizeTextures";
+        case EntryPoint::GLProgramBinary:
+            return "glProgramBinary";
+        case EntryPoint::GLProgramBinaryOES:
+            return "glProgramBinaryOES";
+        case EntryPoint::GLProgramParameteri:
+            return "glProgramParameteri";
+        case EntryPoint::GLProgramParameteriEXT:
+            return "glProgramParameteriEXT";
+        case EntryPoint::GLProgramUniform1d:
+            return "glProgramUniform1d";
+        case EntryPoint::GLProgramUniform1dv:
+            return "glProgramUniform1dv";
+        case EntryPoint::GLProgramUniform1f:
+            return "glProgramUniform1f";
+        case EntryPoint::GLProgramUniform1fEXT:
+            return "glProgramUniform1fEXT";
+        case EntryPoint::GLProgramUniform1fv:
+            return "glProgramUniform1fv";
+        case EntryPoint::GLProgramUniform1fvEXT:
+            return "glProgramUniform1fvEXT";
+        case EntryPoint::GLProgramUniform1i:
+            return "glProgramUniform1i";
+        case EntryPoint::GLProgramUniform1iEXT:
+            return "glProgramUniform1iEXT";
+        case EntryPoint::GLProgramUniform1iv:
+            return "glProgramUniform1iv";
+        case EntryPoint::GLProgramUniform1ivEXT:
+            return "glProgramUniform1ivEXT";
+        case EntryPoint::GLProgramUniform1ui:
+            return "glProgramUniform1ui";
+        case EntryPoint::GLProgramUniform1uiEXT:
+            return "glProgramUniform1uiEXT";
+        case EntryPoint::GLProgramUniform1uiv:
+            return "glProgramUniform1uiv";
+        case EntryPoint::GLProgramUniform1uivEXT:
+            return "glProgramUniform1uivEXT";
+        case EntryPoint::GLProgramUniform2d:
+            return "glProgramUniform2d";
+        case EntryPoint::GLProgramUniform2dv:
+            return "glProgramUniform2dv";
+        case EntryPoint::GLProgramUniform2f:
+            return "glProgramUniform2f";
+        case EntryPoint::GLProgramUniform2fEXT:
+            return "glProgramUniform2fEXT";
+        case EntryPoint::GLProgramUniform2fv:
+            return "glProgramUniform2fv";
+        case EntryPoint::GLProgramUniform2fvEXT:
+            return "glProgramUniform2fvEXT";
+        case EntryPoint::GLProgramUniform2i:
+            return "glProgramUniform2i";
+        case EntryPoint::GLProgramUniform2iEXT:
+            return "glProgramUniform2iEXT";
+        case EntryPoint::GLProgramUniform2iv:
+            return "glProgramUniform2iv";
+        case EntryPoint::GLProgramUniform2ivEXT:
+            return "glProgramUniform2ivEXT";
+        case EntryPoint::GLProgramUniform2ui:
+            return "glProgramUniform2ui";
+        case EntryPoint::GLProgramUniform2uiEXT:
+            return "glProgramUniform2uiEXT";
+        case EntryPoint::GLProgramUniform2uiv:
+            return "glProgramUniform2uiv";
+        case EntryPoint::GLProgramUniform2uivEXT:
+            return "glProgramUniform2uivEXT";
+        case EntryPoint::GLProgramUniform3d:
+            return "glProgramUniform3d";
+        case EntryPoint::GLProgramUniform3dv:
+            return "glProgramUniform3dv";
+        case EntryPoint::GLProgramUniform3f:
+            return "glProgramUniform3f";
+        case EntryPoint::GLProgramUniform3fEXT:
+            return "glProgramUniform3fEXT";
+        case EntryPoint::GLProgramUniform3fv:
+            return "glProgramUniform3fv";
+        case EntryPoint::GLProgramUniform3fvEXT:
+            return "glProgramUniform3fvEXT";
+        case EntryPoint::GLProgramUniform3i:
+            return "glProgramUniform3i";
+        case EntryPoint::GLProgramUniform3iEXT:
+            return "glProgramUniform3iEXT";
+        case EntryPoint::GLProgramUniform3iv:
+            return "glProgramUniform3iv";
+        case EntryPoint::GLProgramUniform3ivEXT:
+            return "glProgramUniform3ivEXT";
+        case EntryPoint::GLProgramUniform3ui:
+            return "glProgramUniform3ui";
+        case EntryPoint::GLProgramUniform3uiEXT:
+            return "glProgramUniform3uiEXT";
+        case EntryPoint::GLProgramUniform3uiv:
+            return "glProgramUniform3uiv";
+        case EntryPoint::GLProgramUniform3uivEXT:
+            return "glProgramUniform3uivEXT";
+        case EntryPoint::GLProgramUniform4d:
+            return "glProgramUniform4d";
+        case EntryPoint::GLProgramUniform4dv:
+            return "glProgramUniform4dv";
+        case EntryPoint::GLProgramUniform4f:
+            return "glProgramUniform4f";
+        case EntryPoint::GLProgramUniform4fEXT:
+            return "glProgramUniform4fEXT";
+        case EntryPoint::GLProgramUniform4fv:
+            return "glProgramUniform4fv";
+        case EntryPoint::GLProgramUniform4fvEXT:
+            return "glProgramUniform4fvEXT";
+        case EntryPoint::GLProgramUniform4i:
+            return "glProgramUniform4i";
+        case EntryPoint::GLProgramUniform4iEXT:
+            return "glProgramUniform4iEXT";
+        case EntryPoint::GLProgramUniform4iv:
+            return "glProgramUniform4iv";
+        case EntryPoint::GLProgramUniform4ivEXT:
+            return "glProgramUniform4ivEXT";
+        case EntryPoint::GLProgramUniform4ui:
+            return "glProgramUniform4ui";
+        case EntryPoint::GLProgramUniform4uiEXT:
+            return "glProgramUniform4uiEXT";
+        case EntryPoint::GLProgramUniform4uiv:
+            return "glProgramUniform4uiv";
+        case EntryPoint::GLProgramUniform4uivEXT:
+            return "glProgramUniform4uivEXT";
+        case EntryPoint::GLProgramUniformMatrix2dv:
+            return "glProgramUniformMatrix2dv";
+        case EntryPoint::GLProgramUniformMatrix2fv:
+            return "glProgramUniformMatrix2fv";
+        case EntryPoint::GLProgramUniformMatrix2fvEXT:
+            return "glProgramUniformMatrix2fvEXT";
+        case EntryPoint::GLProgramUniformMatrix2x3dv:
+            return "glProgramUniformMatrix2x3dv";
+        case EntryPoint::GLProgramUniformMatrix2x3fv:
+            return "glProgramUniformMatrix2x3fv";
+        case EntryPoint::GLProgramUniformMatrix2x3fvEXT:
+            return "glProgramUniformMatrix2x3fvEXT";
+        case EntryPoint::GLProgramUniformMatrix2x4dv:
+            return "glProgramUniformMatrix2x4dv";
+        case EntryPoint::GLProgramUniformMatrix2x4fv:
+            return "glProgramUniformMatrix2x4fv";
+        case EntryPoint::GLProgramUniformMatrix2x4fvEXT:
+            return "glProgramUniformMatrix2x4fvEXT";
+        case EntryPoint::GLProgramUniformMatrix3dv:
+            return "glProgramUniformMatrix3dv";
+        case EntryPoint::GLProgramUniformMatrix3fv:
+            return "glProgramUniformMatrix3fv";
+        case EntryPoint::GLProgramUniformMatrix3fvEXT:
+            return "glProgramUniformMatrix3fvEXT";
+        case EntryPoint::GLProgramUniformMatrix3x2dv:
+            return "glProgramUniformMatrix3x2dv";
+        case EntryPoint::GLProgramUniformMatrix3x2fv:
+            return "glProgramUniformMatrix3x2fv";
+        case EntryPoint::GLProgramUniformMatrix3x2fvEXT:
+            return "glProgramUniformMatrix3x2fvEXT";
+        case EntryPoint::GLProgramUniformMatrix3x4dv:
+            return "glProgramUniformMatrix3x4dv";
+        case EntryPoint::GLProgramUniformMatrix3x4fv:
+            return "glProgramUniformMatrix3x4fv";
+        case EntryPoint::GLProgramUniformMatrix3x4fvEXT:
+            return "glProgramUniformMatrix3x4fvEXT";
+        case EntryPoint::GLProgramUniformMatrix4dv:
+            return "glProgramUniformMatrix4dv";
+        case EntryPoint::GLProgramUniformMatrix4fv:
+            return "glProgramUniformMatrix4fv";
+        case EntryPoint::GLProgramUniformMatrix4fvEXT:
+            return "glProgramUniformMatrix4fvEXT";
+        case EntryPoint::GLProgramUniformMatrix4x2dv:
+            return "glProgramUniformMatrix4x2dv";
+        case EntryPoint::GLProgramUniformMatrix4x2fv:
+            return "glProgramUniformMatrix4x2fv";
+        case EntryPoint::GLProgramUniformMatrix4x2fvEXT:
+            return "glProgramUniformMatrix4x2fvEXT";
+        case EntryPoint::GLProgramUniformMatrix4x3dv:
+            return "glProgramUniformMatrix4x3dv";
+        case EntryPoint::GLProgramUniformMatrix4x3fv:
+            return "glProgramUniformMatrix4x3fv";
+        case EntryPoint::GLProgramUniformMatrix4x3fvEXT:
+            return "glProgramUniformMatrix4x3fvEXT";
+        case EntryPoint::GLProvokingVertex:
+            return "glProvokingVertex";
+        case EntryPoint::GLProvokingVertexANGLE:
+            return "glProvokingVertexANGLE";
+        case EntryPoint::GLPushAttrib:
+            return "glPushAttrib";
+        case EntryPoint::GLPushClientAttrib:
+            return "glPushClientAttrib";
+        case EntryPoint::GLPushDebugGroup:
+            return "glPushDebugGroup";
+        case EntryPoint::GLPushDebugGroupKHR:
+            return "glPushDebugGroupKHR";
+        case EntryPoint::GLPushGroupMarkerEXT:
+            return "glPushGroupMarkerEXT";
+        case EntryPoint::GLPushMatrix:
+            return "glPushMatrix";
+        case EntryPoint::GLPushName:
+            return "glPushName";
+        case EntryPoint::GLQueryCounter:
+            return "glQueryCounter";
+        case EntryPoint::GLQueryCounterEXT:
+            return "glQueryCounterEXT";
+        case EntryPoint::GLQueryMatrixxOES:
+            return "glQueryMatrixxOES";
+        case EntryPoint::GLRasterPos2d:
+            return "glRasterPos2d";
+        case EntryPoint::GLRasterPos2dv:
+            return "glRasterPos2dv";
+        case EntryPoint::GLRasterPos2f:
+            return "glRasterPos2f";
+        case EntryPoint::GLRasterPos2fv:
+            return "glRasterPos2fv";
+        case EntryPoint::GLRasterPos2i:
+            return "glRasterPos2i";
+        case EntryPoint::GLRasterPos2iv:
+            return "glRasterPos2iv";
+        case EntryPoint::GLRasterPos2s:
+            return "glRasterPos2s";
+        case EntryPoint::GLRasterPos2sv:
+            return "glRasterPos2sv";
+        case EntryPoint::GLRasterPos3d:
+            return "glRasterPos3d";
+        case EntryPoint::GLRasterPos3dv:
+            return "glRasterPos3dv";
+        case EntryPoint::GLRasterPos3f:
+            return "glRasterPos3f";
+        case EntryPoint::GLRasterPos3fv:
+            return "glRasterPos3fv";
+        case EntryPoint::GLRasterPos3i:
+            return "glRasterPos3i";
+        case EntryPoint::GLRasterPos3iv:
+            return "glRasterPos3iv";
+        case EntryPoint::GLRasterPos3s:
+            return "glRasterPos3s";
+        case EntryPoint::GLRasterPos3sv:
+            return "glRasterPos3sv";
+        case EntryPoint::GLRasterPos4d:
+            return "glRasterPos4d";
+        case EntryPoint::GLRasterPos4dv:
+            return "glRasterPos4dv";
+        case EntryPoint::GLRasterPos4f:
+            return "glRasterPos4f";
+        case EntryPoint::GLRasterPos4fv:
+            return "glRasterPos4fv";
+        case EntryPoint::GLRasterPos4i:
+            return "glRasterPos4i";
+        case EntryPoint::GLRasterPos4iv:
+            return "glRasterPos4iv";
+        case EntryPoint::GLRasterPos4s:
+            return "glRasterPos4s";
+        case EntryPoint::GLRasterPos4sv:
+            return "glRasterPos4sv";
+        case EntryPoint::GLReadBuffer:
+            return "glReadBuffer";
+        case EntryPoint::GLReadPixels:
+            return "glReadPixels";
+        case EntryPoint::GLReadPixelsRobustANGLE:
+            return "glReadPixelsRobustANGLE";
+        case EntryPoint::GLReadnPixels:
+            return "glReadnPixels";
+        case EntryPoint::GLReadnPixelsEXT:
+            return "glReadnPixelsEXT";
+        case EntryPoint::GLReadnPixelsRobustANGLE:
+            return "glReadnPixelsRobustANGLE";
+        case EntryPoint::GLRectd:
+            return "glRectd";
+        case EntryPoint::GLRectdv:
+            return "glRectdv";
+        case EntryPoint::GLRectf:
+            return "glRectf";
+        case EntryPoint::GLRectfv:
+            return "glRectfv";
+        case EntryPoint::GLRecti:
+            return "glRecti";
+        case EntryPoint::GLRectiv:
+            return "glRectiv";
+        case EntryPoint::GLRects:
+            return "glRects";
+        case EntryPoint::GLRectsv:
+            return "glRectsv";
+        case EntryPoint::GLReleaseShaderCompiler:
+            return "glReleaseShaderCompiler";
+        case EntryPoint::GLReleaseTexturesANGLE:
+            return "glReleaseTexturesANGLE";
+        case EntryPoint::GLRenderMode:
+            return "glRenderMode";
+        case EntryPoint::GLRenderbufferStorage:
+            return "glRenderbufferStorage";
+        case EntryPoint::GLRenderbufferStorageMultisample:
+            return "glRenderbufferStorageMultisample";
+        case EntryPoint::GLRenderbufferStorageMultisampleANGLE:
+            return "glRenderbufferStorageMultisampleANGLE";
+        case EntryPoint::GLRenderbufferStorageMultisampleEXT:
+            return "glRenderbufferStorageMultisampleEXT";
+        case EntryPoint::GLRenderbufferStorageOES:
+            return "glRenderbufferStorageOES";
+        case EntryPoint::GLRequestExtensionANGLE:
+            return "glRequestExtensionANGLE";
+        case EntryPoint::GLResumeTransformFeedback:
+            return "glResumeTransformFeedback";
+        case EntryPoint::GLRotated:
+            return "glRotated";
+        case EntryPoint::GLRotatef:
+            return "glRotatef";
+        case EntryPoint::GLRotatex:
+            return "glRotatex";
+        case EntryPoint::GLSampleCoverage:
+            return "glSampleCoverage";
+        case EntryPoint::GLSampleCoveragex:
+            return "glSampleCoveragex";
+        case EntryPoint::GLSampleMaski:
+            return "glSampleMaski";
+        case EntryPoint::GLSampleMaskiANGLE:
+            return "glSampleMaskiANGLE";
+        case EntryPoint::GLSamplerParameterIiv:
+            return "glSamplerParameterIiv";
+        case EntryPoint::GLSamplerParameterIivEXT:
+            return "glSamplerParameterIivEXT";
+        case EntryPoint::GLSamplerParameterIivOES:
+            return "glSamplerParameterIivOES";
+        case EntryPoint::GLSamplerParameterIivRobustANGLE:
+            return "glSamplerParameterIivRobustANGLE";
+        case EntryPoint::GLSamplerParameterIuiv:
+            return "glSamplerParameterIuiv";
+        case EntryPoint::GLSamplerParameterIuivEXT:
+            return "glSamplerParameterIuivEXT";
+        case EntryPoint::GLSamplerParameterIuivOES:
+            return "glSamplerParameterIuivOES";
+        case EntryPoint::GLSamplerParameterIuivRobustANGLE:
+            return "glSamplerParameterIuivRobustANGLE";
+        case EntryPoint::GLSamplerParameterf:
+            return "glSamplerParameterf";
+        case EntryPoint::GLSamplerParameterfv:
+            return "glSamplerParameterfv";
+        case EntryPoint::GLSamplerParameterfvRobustANGLE:
+            return "glSamplerParameterfvRobustANGLE";
+        case EntryPoint::GLSamplerParameteri:
+            return "glSamplerParameteri";
+        case EntryPoint::GLSamplerParameteriv:
+            return "glSamplerParameteriv";
+        case EntryPoint::GLSamplerParameterivRobustANGLE:
+            return "glSamplerParameterivRobustANGLE";
+        case EntryPoint::GLScaled:
+            return "glScaled";
+        case EntryPoint::GLScalef:
+            return "glScalef";
+        case EntryPoint::GLScalex:
+            return "glScalex";
+        case EntryPoint::GLScissor:
+            return "glScissor";
+        case EntryPoint::GLScissorArrayv:
+            return "glScissorArrayv";
+        case EntryPoint::GLScissorIndexed:
+            return "glScissorIndexed";
+        case EntryPoint::GLScissorIndexedv:
+            return "glScissorIndexedv";
+        case EntryPoint::GLSecondaryColor3b:
+            return "glSecondaryColor3b";
+        case EntryPoint::GLSecondaryColor3bv:
+            return "glSecondaryColor3bv";
+        case EntryPoint::GLSecondaryColor3d:
+            return "glSecondaryColor3d";
+        case EntryPoint::GLSecondaryColor3dv:
+            return "glSecondaryColor3dv";
+        case EntryPoint::GLSecondaryColor3f:
+            return "glSecondaryColor3f";
+        case EntryPoint::GLSecondaryColor3fv:
+            return "glSecondaryColor3fv";
+        case EntryPoint::GLSecondaryColor3i:
+            return "glSecondaryColor3i";
+        case EntryPoint::GLSecondaryColor3iv:
+            return "glSecondaryColor3iv";
+        case EntryPoint::GLSecondaryColor3s:
+            return "glSecondaryColor3s";
+        case EntryPoint::GLSecondaryColor3sv:
+            return "glSecondaryColor3sv";
+        case EntryPoint::GLSecondaryColor3ub:
+            return "glSecondaryColor3ub";
+        case EntryPoint::GLSecondaryColor3ubv:
+            return "glSecondaryColor3ubv";
+        case EntryPoint::GLSecondaryColor3ui:
+            return "glSecondaryColor3ui";
+        case EntryPoint::GLSecondaryColor3uiv:
+            return "glSecondaryColor3uiv";
+        case EntryPoint::GLSecondaryColor3us:
+            return "glSecondaryColor3us";
+        case EntryPoint::GLSecondaryColor3usv:
+            return "glSecondaryColor3usv";
+        case EntryPoint::GLSecondaryColorP3ui:
+            return "glSecondaryColorP3ui";
+        case EntryPoint::GLSecondaryColorP3uiv:
+            return "glSecondaryColorP3uiv";
+        case EntryPoint::GLSecondaryColorPointer:
+            return "glSecondaryColorPointer";
+        case EntryPoint::GLSelectBuffer:
+            return "glSelectBuffer";
+        case EntryPoint::GLSelectPerfMonitorCountersAMD:
+            return "glSelectPerfMonitorCountersAMD";
+        case EntryPoint::GLSemaphoreParameterui64vEXT:
+            return "glSemaphoreParameterui64vEXT";
+        case EntryPoint::GLSetFenceNV:
+            return "glSetFenceNV";
+        case EntryPoint::GLShadeModel:
+            return "glShadeModel";
+        case EntryPoint::GLShaderBinary:
+            return "glShaderBinary";
+        case EntryPoint::GLShaderSource:
+            return "glShaderSource";
+        case EntryPoint::GLShaderStorageBlockBinding:
+            return "glShaderStorageBlockBinding";
+        case EntryPoint::GLShadingRateQCOM:
+            return "glShadingRateQCOM";
+        case EntryPoint::GLSignalSemaphoreEXT:
+            return "glSignalSemaphoreEXT";
+        case EntryPoint::GLSpecializeShader:
+            return "glSpecializeShader";
+        case EntryPoint::GLStencilFunc:
+            return "glStencilFunc";
+        case EntryPoint::GLStencilFuncSeparate:
+            return "glStencilFuncSeparate";
+        case EntryPoint::GLStencilMask:
+            return "glStencilMask";
+        case EntryPoint::GLStencilMaskSeparate:
+            return "glStencilMaskSeparate";
+        case EntryPoint::GLStencilOp:
+            return "glStencilOp";
+        case EntryPoint::GLStencilOpSeparate:
+            return "glStencilOpSeparate";
+        case EntryPoint::GLTestFenceNV:
+            return "glTestFenceNV";
+        case EntryPoint::GLTexBuffer:
+            return "glTexBuffer";
+        case EntryPoint::GLTexBufferEXT:
+            return "glTexBufferEXT";
+        case EntryPoint::GLTexBufferOES:
+            return "glTexBufferOES";
+        case EntryPoint::GLTexBufferRange:
+            return "glTexBufferRange";
+        case EntryPoint::GLTexBufferRangeEXT:
+            return "glTexBufferRangeEXT";
+        case EntryPoint::GLTexBufferRangeOES:
+            return "glTexBufferRangeOES";
+        case EntryPoint::GLTexCoord1d:
+            return "glTexCoord1d";
+        case EntryPoint::GLTexCoord1dv:
+            return "glTexCoord1dv";
+        case EntryPoint::GLTexCoord1f:
+            return "glTexCoord1f";
+        case EntryPoint::GLTexCoord1fv:
+            return "glTexCoord1fv";
+        case EntryPoint::GLTexCoord1i:
+            return "glTexCoord1i";
+        case EntryPoint::GLTexCoord1iv:
+            return "glTexCoord1iv";
+        case EntryPoint::GLTexCoord1s:
+            return "glTexCoord1s";
+        case EntryPoint::GLTexCoord1sv:
+            return "glTexCoord1sv";
+        case EntryPoint::GLTexCoord2d:
+            return "glTexCoord2d";
+        case EntryPoint::GLTexCoord2dv:
+            return "glTexCoord2dv";
+        case EntryPoint::GLTexCoord2f:
+            return "glTexCoord2f";
+        case EntryPoint::GLTexCoord2fv:
+            return "glTexCoord2fv";
+        case EntryPoint::GLTexCoord2i:
+            return "glTexCoord2i";
+        case EntryPoint::GLTexCoord2iv:
+            return "glTexCoord2iv";
+        case EntryPoint::GLTexCoord2s:
+            return "glTexCoord2s";
+        case EntryPoint::GLTexCoord2sv:
+            return "glTexCoord2sv";
+        case EntryPoint::GLTexCoord3d:
+            return "glTexCoord3d";
+        case EntryPoint::GLTexCoord3dv:
+            return "glTexCoord3dv";
+        case EntryPoint::GLTexCoord3f:
+            return "glTexCoord3f";
+        case EntryPoint::GLTexCoord3fv:
+            return "glTexCoord3fv";
+        case EntryPoint::GLTexCoord3i:
+            return "glTexCoord3i";
+        case EntryPoint::GLTexCoord3iv:
+            return "glTexCoord3iv";
+        case EntryPoint::GLTexCoord3s:
+            return "glTexCoord3s";
+        case EntryPoint::GLTexCoord3sv:
+            return "glTexCoord3sv";
+        case EntryPoint::GLTexCoord4d:
+            return "glTexCoord4d";
+        case EntryPoint::GLTexCoord4dv:
+            return "glTexCoord4dv";
+        case EntryPoint::GLTexCoord4f:
+            return "glTexCoord4f";
+        case EntryPoint::GLTexCoord4fv:
+            return "glTexCoord4fv";
+        case EntryPoint::GLTexCoord4i:
+            return "glTexCoord4i";
+        case EntryPoint::GLTexCoord4iv:
+            return "glTexCoord4iv";
+        case EntryPoint::GLTexCoord4s:
+            return "glTexCoord4s";
+        case EntryPoint::GLTexCoord4sv:
+            return "glTexCoord4sv";
+        case EntryPoint::GLTexCoordP1ui:
+            return "glTexCoordP1ui";
+        case EntryPoint::GLTexCoordP1uiv:
+            return "glTexCoordP1uiv";
+        case EntryPoint::GLTexCoordP2ui:
+            return "glTexCoordP2ui";
+        case EntryPoint::GLTexCoordP2uiv:
+            return "glTexCoordP2uiv";
+        case EntryPoint::GLTexCoordP3ui:
+            return "glTexCoordP3ui";
+        case EntryPoint::GLTexCoordP3uiv:
+            return "glTexCoordP3uiv";
+        case EntryPoint::GLTexCoordP4ui:
+            return "glTexCoordP4ui";
+        case EntryPoint::GLTexCoordP4uiv:
+            return "glTexCoordP4uiv";
+        case EntryPoint::GLTexCoordPointer:
+            return "glTexCoordPointer";
+        case EntryPoint::GLTexEnvf:
+            return "glTexEnvf";
+        case EntryPoint::GLTexEnvfv:
+            return "glTexEnvfv";
+        case EntryPoint::GLTexEnvi:
+            return "glTexEnvi";
+        case EntryPoint::GLTexEnviv:
+            return "glTexEnviv";
+        case EntryPoint::GLTexEnvx:
+            return "glTexEnvx";
+        case EntryPoint::GLTexEnvxv:
+            return "glTexEnvxv";
+        case EntryPoint::GLTexGend:
+            return "glTexGend";
+        case EntryPoint::GLTexGendv:
+            return "glTexGendv";
+        case EntryPoint::GLTexGenf:
+            return "glTexGenf";
+        case EntryPoint::GLTexGenfOES:
+            return "glTexGenfOES";
+        case EntryPoint::GLTexGenfv:
+            return "glTexGenfv";
+        case EntryPoint::GLTexGenfvOES:
+            return "glTexGenfvOES";
+        case EntryPoint::GLTexGeni:
+            return "glTexGeni";
+        case EntryPoint::GLTexGeniOES:
+            return "glTexGeniOES";
+        case EntryPoint::GLTexGeniv:
+            return "glTexGeniv";
+        case EntryPoint::GLTexGenivOES:
+            return "glTexGenivOES";
+        case EntryPoint::GLTexGenxOES:
+            return "glTexGenxOES";
+        case EntryPoint::GLTexGenxvOES:
+            return "glTexGenxvOES";
+        case EntryPoint::GLTexImage1D:
+            return "glTexImage1D";
+        case EntryPoint::GLTexImage2D:
+            return "glTexImage2D";
+        case EntryPoint::GLTexImage2DExternalANGLE:
+            return "glTexImage2DExternalANGLE";
+        case EntryPoint::GLTexImage2DMultisample:
+            return "glTexImage2DMultisample";
+        case EntryPoint::GLTexImage2DRobustANGLE:
+            return "glTexImage2DRobustANGLE";
+        case EntryPoint::GLTexImage3D:
+            return "glTexImage3D";
+        case EntryPoint::GLTexImage3DMultisample:
+            return "glTexImage3DMultisample";
+        case EntryPoint::GLTexImage3DOES:
+            return "glTexImage3DOES";
+        case EntryPoint::GLTexImage3DRobustANGLE:
+            return "glTexImage3DRobustANGLE";
+        case EntryPoint::GLTexParameterIiv:
+            return "glTexParameterIiv";
+        case EntryPoint::GLTexParameterIivEXT:
+            return "glTexParameterIivEXT";
+        case EntryPoint::GLTexParameterIivOES:
+            return "glTexParameterIivOES";
+        case EntryPoint::GLTexParameterIivRobustANGLE:
+            return "glTexParameterIivRobustANGLE";
+        case EntryPoint::GLTexParameterIuiv:
+            return "glTexParameterIuiv";
+        case EntryPoint::GLTexParameterIuivEXT:
+            return "glTexParameterIuivEXT";
+        case EntryPoint::GLTexParameterIuivOES:
+            return "glTexParameterIuivOES";
+        case EntryPoint::GLTexParameterIuivRobustANGLE:
+            return "glTexParameterIuivRobustANGLE";
+        case EntryPoint::GLTexParameterf:
+            return "glTexParameterf";
+        case EntryPoint::GLTexParameterfv:
+            return "glTexParameterfv";
+        case EntryPoint::GLTexParameterfvRobustANGLE:
+            return "glTexParameterfvRobustANGLE";
+        case EntryPoint::GLTexParameteri:
+            return "glTexParameteri";
+        case EntryPoint::GLTexParameteriv:
+            return "glTexParameteriv";
+        case EntryPoint::GLTexParameterivRobustANGLE:
+            return "glTexParameterivRobustANGLE";
+        case EntryPoint::GLTexParameterx:
+            return "glTexParameterx";
+        case EntryPoint::GLTexParameterxv:
+            return "glTexParameterxv";
+        case EntryPoint::GLTexStorage1D:
+            return "glTexStorage1D";
+        case EntryPoint::GLTexStorage1DEXT:
+            return "glTexStorage1DEXT";
+        case EntryPoint::GLTexStorage2D:
+            return "glTexStorage2D";
+        case EntryPoint::GLTexStorage2DEXT:
+            return "glTexStorage2DEXT";
+        case EntryPoint::GLTexStorage2DMultisample:
+            return "glTexStorage2DMultisample";
+        case EntryPoint::GLTexStorage2DMultisampleANGLE:
+            return "glTexStorage2DMultisampleANGLE";
+        case EntryPoint::GLTexStorage3D:
+            return "glTexStorage3D";
+        case EntryPoint::GLTexStorage3DEXT:
+            return "glTexStorage3DEXT";
+        case EntryPoint::GLTexStorage3DMultisample:
+            return "glTexStorage3DMultisample";
+        case EntryPoint::GLTexStorage3DMultisampleOES:
+            return "glTexStorage3DMultisampleOES";
+        case EntryPoint::GLTexStorageMem2DEXT:
+            return "glTexStorageMem2DEXT";
+        case EntryPoint::GLTexStorageMem2DMultisampleEXT:
+            return "glTexStorageMem2DMultisampleEXT";
+        case EntryPoint::GLTexStorageMem3DEXT:
+            return "glTexStorageMem3DEXT";
+        case EntryPoint::GLTexStorageMem3DMultisampleEXT:
+            return "glTexStorageMem3DMultisampleEXT";
+        case EntryPoint::GLTexStorageMemFlags2DANGLE:
+            return "glTexStorageMemFlags2DANGLE";
+        case EntryPoint::GLTexStorageMemFlags2DMultisampleANGLE:
+            return "glTexStorageMemFlags2DMultisampleANGLE";
+        case EntryPoint::GLTexStorageMemFlags3DANGLE:
+            return "glTexStorageMemFlags3DANGLE";
+        case EntryPoint::GLTexStorageMemFlags3DMultisampleANGLE:
+            return "glTexStorageMemFlags3DMultisampleANGLE";
+        case EntryPoint::GLTexSubImage1D:
+            return "glTexSubImage1D";
+        case EntryPoint::GLTexSubImage2D:
+            return "glTexSubImage2D";
+        case EntryPoint::GLTexSubImage2DRobustANGLE:
+            return "glTexSubImage2DRobustANGLE";
+        case EntryPoint::GLTexSubImage3D:
+            return "glTexSubImage3D";
+        case EntryPoint::GLTexSubImage3DOES:
+            return "glTexSubImage3DOES";
+        case EntryPoint::GLTexSubImage3DRobustANGLE:
+            return "glTexSubImage3DRobustANGLE";
+        case EntryPoint::GLTextureBarrier:
+            return "glTextureBarrier";
+        case EntryPoint::GLTextureBuffer:
+            return "glTextureBuffer";
+        case EntryPoint::GLTextureBufferRange:
+            return "glTextureBufferRange";
+        case EntryPoint::GLTextureParameterIiv:
+            return "glTextureParameterIiv";
+        case EntryPoint::GLTextureParameterIuiv:
+            return "glTextureParameterIuiv";
+        case EntryPoint::GLTextureParameterf:
+            return "glTextureParameterf";
+        case EntryPoint::GLTextureParameterfv:
+            return "glTextureParameterfv";
+        case EntryPoint::GLTextureParameteri:
+            return "glTextureParameteri";
+        case EntryPoint::GLTextureParameteriv:
+            return "glTextureParameteriv";
+        case EntryPoint::GLTextureStorage1D:
+            return "glTextureStorage1D";
+        case EntryPoint::GLTextureStorage2D:
+            return "glTextureStorage2D";
+        case EntryPoint::GLTextureStorage2DMultisample:
+            return "glTextureStorage2DMultisample";
+        case EntryPoint::GLTextureStorage3D:
+            return "glTextureStorage3D";
+        case EntryPoint::GLTextureStorage3DMultisample:
+            return "glTextureStorage3DMultisample";
+        case EntryPoint::GLTextureSubImage1D:
+            return "glTextureSubImage1D";
+        case EntryPoint::GLTextureSubImage2D:
+            return "glTextureSubImage2D";
+        case EntryPoint::GLTextureSubImage3D:
+            return "glTextureSubImage3D";
+        case EntryPoint::GLTextureView:
+            return "glTextureView";
+        case EntryPoint::GLTransformFeedbackBufferBase:
+            return "glTransformFeedbackBufferBase";
+        case EntryPoint::GLTransformFeedbackBufferRange:
+            return "glTransformFeedbackBufferRange";
+        case EntryPoint::GLTransformFeedbackVaryings:
+            return "glTransformFeedbackVaryings";
+        case EntryPoint::GLTranslated:
+            return "glTranslated";
+        case EntryPoint::GLTranslatef:
+            return "glTranslatef";
+        case EntryPoint::GLTranslatex:
+            return "glTranslatex";
+        case EntryPoint::GLUniform1d:
+            return "glUniform1d";
+        case EntryPoint::GLUniform1dv:
+            return "glUniform1dv";
+        case EntryPoint::GLUniform1f:
+            return "glUniform1f";
+        case EntryPoint::GLUniform1fv:
+            return "glUniform1fv";
+        case EntryPoint::GLUniform1i:
+            return "glUniform1i";
+        case EntryPoint::GLUniform1iv:
+            return "glUniform1iv";
+        case EntryPoint::GLUniform1ui:
+            return "glUniform1ui";
+        case EntryPoint::GLUniform1uiv:
+            return "glUniform1uiv";
+        case EntryPoint::GLUniform2d:
+            return "glUniform2d";
+        case EntryPoint::GLUniform2dv:
+            return "glUniform2dv";
+        case EntryPoint::GLUniform2f:
+            return "glUniform2f";
+        case EntryPoint::GLUniform2fv:
+            return "glUniform2fv";
+        case EntryPoint::GLUniform2i:
+            return "glUniform2i";
+        case EntryPoint::GLUniform2iv:
+            return "glUniform2iv";
+        case EntryPoint::GLUniform2ui:
+            return "glUniform2ui";
+        case EntryPoint::GLUniform2uiv:
+            return "glUniform2uiv";
+        case EntryPoint::GLUniform3d:
+            return "glUniform3d";
+        case EntryPoint::GLUniform3dv:
+            return "glUniform3dv";
+        case EntryPoint::GLUniform3f:
+            return "glUniform3f";
+        case EntryPoint::GLUniform3fv:
+            return "glUniform3fv";
+        case EntryPoint::GLUniform3i:
+            return "glUniform3i";
+        case EntryPoint::GLUniform3iv:
+            return "glUniform3iv";
+        case EntryPoint::GLUniform3ui:
+            return "glUniform3ui";
+        case EntryPoint::GLUniform3uiv:
+            return "glUniform3uiv";
+        case EntryPoint::GLUniform4d:
+            return "glUniform4d";
+        case EntryPoint::GLUniform4dv:
+            return "glUniform4dv";
+        case EntryPoint::GLUniform4f:
+            return "glUniform4f";
+        case EntryPoint::GLUniform4fv:
+            return "glUniform4fv";
+        case EntryPoint::GLUniform4i:
+            return "glUniform4i";
+        case EntryPoint::GLUniform4iv:
+            return "glUniform4iv";
+        case EntryPoint::GLUniform4ui:
+            return "glUniform4ui";
+        case EntryPoint::GLUniform4uiv:
+            return "glUniform4uiv";
+        case EntryPoint::GLUniformBlockBinding:
+            return "glUniformBlockBinding";
+        case EntryPoint::GLUniformMatrix2dv:
+            return "glUniformMatrix2dv";
+        case EntryPoint::GLUniformMatrix2fv:
+            return "glUniformMatrix2fv";
+        case EntryPoint::GLUniformMatrix2x3dv:
+            return "glUniformMatrix2x3dv";
+        case EntryPoint::GLUniformMatrix2x3fv:
+            return "glUniformMatrix2x3fv";
+        case EntryPoint::GLUniformMatrix2x4dv:
+            return "glUniformMatrix2x4dv";
+        case EntryPoint::GLUniformMatrix2x4fv:
+            return "glUniformMatrix2x4fv";
+        case EntryPoint::GLUniformMatrix3dv:
+            return "glUniformMatrix3dv";
+        case EntryPoint::GLUniformMatrix3fv:
+            return "glUniformMatrix3fv";
+        case EntryPoint::GLUniformMatrix3x2dv:
+            return "glUniformMatrix3x2dv";
+        case EntryPoint::GLUniformMatrix3x2fv:
+            return "glUniformMatrix3x2fv";
+        case EntryPoint::GLUniformMatrix3x4dv:
+            return "glUniformMatrix3x4dv";
+        case EntryPoint::GLUniformMatrix3x4fv:
+            return "glUniformMatrix3x4fv";
+        case EntryPoint::GLUniformMatrix4dv:
+            return "glUniformMatrix4dv";
+        case EntryPoint::GLUniformMatrix4fv:
+            return "glUniformMatrix4fv";
+        case EntryPoint::GLUniformMatrix4x2dv:
+            return "glUniformMatrix4x2dv";
+        case EntryPoint::GLUniformMatrix4x2fv:
+            return "glUniformMatrix4x2fv";
+        case EntryPoint::GLUniformMatrix4x3dv:
+            return "glUniformMatrix4x3dv";
+        case EntryPoint::GLUniformMatrix4x3fv:
+            return "glUniformMatrix4x3fv";
+        case EntryPoint::GLUniformSubroutinesuiv:
+            return "glUniformSubroutinesuiv";
+        case EntryPoint::GLUnmapBuffer:
+            return "glUnmapBuffer";
+        case EntryPoint::GLUnmapBufferOES:
+            return "glUnmapBufferOES";
+        case EntryPoint::GLUnmapNamedBuffer:
+            return "glUnmapNamedBuffer";
+        case EntryPoint::GLUseProgram:
+            return "glUseProgram";
+        case EntryPoint::GLUseProgramStages:
+            return "glUseProgramStages";
+        case EntryPoint::GLUseProgramStagesEXT:
+            return "glUseProgramStagesEXT";
+        case EntryPoint::GLValidateProgram:
+            return "glValidateProgram";
+        case EntryPoint::GLValidateProgramPipeline:
+            return "glValidateProgramPipeline";
+        case EntryPoint::GLValidateProgramPipelineEXT:
+            return "glValidateProgramPipelineEXT";
+        case EntryPoint::GLVertex2d:
+            return "glVertex2d";
+        case EntryPoint::GLVertex2dv:
+            return "glVertex2dv";
+        case EntryPoint::GLVertex2f:
+            return "glVertex2f";
+        case EntryPoint::GLVertex2fv:
+            return "glVertex2fv";
+        case EntryPoint::GLVertex2i:
+            return "glVertex2i";
+        case EntryPoint::GLVertex2iv:
+            return "glVertex2iv";
+        case EntryPoint::GLVertex2s:
+            return "glVertex2s";
+        case EntryPoint::GLVertex2sv:
+            return "glVertex2sv";
+        case EntryPoint::GLVertex3d:
+            return "glVertex3d";
+        case EntryPoint::GLVertex3dv:
+            return "glVertex3dv";
+        case EntryPoint::GLVertex3f:
+            return "glVertex3f";
+        case EntryPoint::GLVertex3fv:
+            return "glVertex3fv";
+        case EntryPoint::GLVertex3i:
+            return "glVertex3i";
+        case EntryPoint::GLVertex3iv:
+            return "glVertex3iv";
+        case EntryPoint::GLVertex3s:
+            return "glVertex3s";
+        case EntryPoint::GLVertex3sv:
+            return "glVertex3sv";
+        case EntryPoint::GLVertex4d:
+            return "glVertex4d";
+        case EntryPoint::GLVertex4dv:
+            return "glVertex4dv";
+        case EntryPoint::GLVertex4f:
+            return "glVertex4f";
+        case EntryPoint::GLVertex4fv:
+            return "glVertex4fv";
+        case EntryPoint::GLVertex4i:
+            return "glVertex4i";
+        case EntryPoint::GLVertex4iv:
+            return "glVertex4iv";
+        case EntryPoint::GLVertex4s:
+            return "glVertex4s";
+        case EntryPoint::GLVertex4sv:
+            return "glVertex4sv";
+        case EntryPoint::GLVertexArrayAttribBinding:
+            return "glVertexArrayAttribBinding";
+        case EntryPoint::GLVertexArrayAttribFormat:
+            return "glVertexArrayAttribFormat";
+        case EntryPoint::GLVertexArrayAttribIFormat:
+            return "glVertexArrayAttribIFormat";
+        case EntryPoint::GLVertexArrayAttribLFormat:
+            return "glVertexArrayAttribLFormat";
+        case EntryPoint::GLVertexArrayBindingDivisor:
+            return "glVertexArrayBindingDivisor";
+        case EntryPoint::GLVertexArrayElementBuffer:
+            return "glVertexArrayElementBuffer";
+        case EntryPoint::GLVertexArrayVertexBuffer:
+            return "glVertexArrayVertexBuffer";
+        case EntryPoint::GLVertexArrayVertexBuffers:
+            return "glVertexArrayVertexBuffers";
+        case EntryPoint::GLVertexAttrib1d:
+            return "glVertexAttrib1d";
+        case EntryPoint::GLVertexAttrib1dv:
+            return "glVertexAttrib1dv";
+        case EntryPoint::GLVertexAttrib1f:
+            return "glVertexAttrib1f";
+        case EntryPoint::GLVertexAttrib1fv:
+            return "glVertexAttrib1fv";
+        case EntryPoint::GLVertexAttrib1s:
+            return "glVertexAttrib1s";
+        case EntryPoint::GLVertexAttrib1sv:
+            return "glVertexAttrib1sv";
+        case EntryPoint::GLVertexAttrib2d:
+            return "glVertexAttrib2d";
+        case EntryPoint::GLVertexAttrib2dv:
+            return "glVertexAttrib2dv";
+        case EntryPoint::GLVertexAttrib2f:
+            return "glVertexAttrib2f";
+        case EntryPoint::GLVertexAttrib2fv:
+            return "glVertexAttrib2fv";
+        case EntryPoint::GLVertexAttrib2s:
+            return "glVertexAttrib2s";
+        case EntryPoint::GLVertexAttrib2sv:
+            return "glVertexAttrib2sv";
+        case EntryPoint::GLVertexAttrib3d:
+            return "glVertexAttrib3d";
+        case EntryPoint::GLVertexAttrib3dv:
+            return "glVertexAttrib3dv";
+        case EntryPoint::GLVertexAttrib3f:
+            return "glVertexAttrib3f";
+        case EntryPoint::GLVertexAttrib3fv:
+            return "glVertexAttrib3fv";
+        case EntryPoint::GLVertexAttrib3s:
+            return "glVertexAttrib3s";
+        case EntryPoint::GLVertexAttrib3sv:
+            return "glVertexAttrib3sv";
+        case EntryPoint::GLVertexAttrib4Nbv:
+            return "glVertexAttrib4Nbv";
+        case EntryPoint::GLVertexAttrib4Niv:
+            return "glVertexAttrib4Niv";
+        case EntryPoint::GLVertexAttrib4Nsv:
+            return "glVertexAttrib4Nsv";
+        case EntryPoint::GLVertexAttrib4Nub:
+            return "glVertexAttrib4Nub";
+        case EntryPoint::GLVertexAttrib4Nubv:
+            return "glVertexAttrib4Nubv";
+        case EntryPoint::GLVertexAttrib4Nuiv:
+            return "glVertexAttrib4Nuiv";
+        case EntryPoint::GLVertexAttrib4Nusv:
+            return "glVertexAttrib4Nusv";
+        case EntryPoint::GLVertexAttrib4bv:
+            return "glVertexAttrib4bv";
+        case EntryPoint::GLVertexAttrib4d:
+            return "glVertexAttrib4d";
+        case EntryPoint::GLVertexAttrib4dv:
+            return "glVertexAttrib4dv";
+        case EntryPoint::GLVertexAttrib4f:
+            return "glVertexAttrib4f";
+        case EntryPoint::GLVertexAttrib4fv:
+            return "glVertexAttrib4fv";
+        case EntryPoint::GLVertexAttrib4iv:
+            return "glVertexAttrib4iv";
+        case EntryPoint::GLVertexAttrib4s:
+            return "glVertexAttrib4s";
+        case EntryPoint::GLVertexAttrib4sv:
+            return "glVertexAttrib4sv";
+        case EntryPoint::GLVertexAttrib4ubv:
+            return "glVertexAttrib4ubv";
+        case EntryPoint::GLVertexAttrib4uiv:
+            return "glVertexAttrib4uiv";
+        case EntryPoint::GLVertexAttrib4usv:
+            return "glVertexAttrib4usv";
+        case EntryPoint::GLVertexAttribBinding:
+            return "glVertexAttribBinding";
+        case EntryPoint::GLVertexAttribDivisor:
+            return "glVertexAttribDivisor";
+        case EntryPoint::GLVertexAttribDivisorANGLE:
+            return "glVertexAttribDivisorANGLE";
+        case EntryPoint::GLVertexAttribDivisorEXT:
+            return "glVertexAttribDivisorEXT";
+        case EntryPoint::GLVertexAttribFormat:
+            return "glVertexAttribFormat";
+        case EntryPoint::GLVertexAttribI1i:
+            return "glVertexAttribI1i";
+        case EntryPoint::GLVertexAttribI1iv:
+            return "glVertexAttribI1iv";
+        case EntryPoint::GLVertexAttribI1ui:
+            return "glVertexAttribI1ui";
+        case EntryPoint::GLVertexAttribI1uiv:
+            return "glVertexAttribI1uiv";
+        case EntryPoint::GLVertexAttribI2i:
+            return "glVertexAttribI2i";
+        case EntryPoint::GLVertexAttribI2iv:
+            return "glVertexAttribI2iv";
+        case EntryPoint::GLVertexAttribI2ui:
+            return "glVertexAttribI2ui";
+        case EntryPoint::GLVertexAttribI2uiv:
+            return "glVertexAttribI2uiv";
+        case EntryPoint::GLVertexAttribI3i:
+            return "glVertexAttribI3i";
+        case EntryPoint::GLVertexAttribI3iv:
+            return "glVertexAttribI3iv";
+        case EntryPoint::GLVertexAttribI3ui:
+            return "glVertexAttribI3ui";
+        case EntryPoint::GLVertexAttribI3uiv:
+            return "glVertexAttribI3uiv";
+        case EntryPoint::GLVertexAttribI4bv:
+            return "glVertexAttribI4bv";
+        case EntryPoint::GLVertexAttribI4i:
+            return "glVertexAttribI4i";
+        case EntryPoint::GLVertexAttribI4iv:
+            return "glVertexAttribI4iv";
+        case EntryPoint::GLVertexAttribI4sv:
+            return "glVertexAttribI4sv";
+        case EntryPoint::GLVertexAttribI4ubv:
+            return "glVertexAttribI4ubv";
+        case EntryPoint::GLVertexAttribI4ui:
+            return "glVertexAttribI4ui";
+        case EntryPoint::GLVertexAttribI4uiv:
+            return "glVertexAttribI4uiv";
+        case EntryPoint::GLVertexAttribI4usv:
+            return "glVertexAttribI4usv";
+        case EntryPoint::GLVertexAttribIFormat:
+            return "glVertexAttribIFormat";
+        case EntryPoint::GLVertexAttribIPointer:
+            return "glVertexAttribIPointer";
+        case EntryPoint::GLVertexAttribL1d:
+            return "glVertexAttribL1d";
+        case EntryPoint::GLVertexAttribL1dv:
+            return "glVertexAttribL1dv";
+        case EntryPoint::GLVertexAttribL2d:
+            return "glVertexAttribL2d";
+        case EntryPoint::GLVertexAttribL2dv:
+            return "glVertexAttribL2dv";
+        case EntryPoint::GLVertexAttribL3d:
+            return "glVertexAttribL3d";
+        case EntryPoint::GLVertexAttribL3dv:
+            return "glVertexAttribL3dv";
+        case EntryPoint::GLVertexAttribL4d:
+            return "glVertexAttribL4d";
+        case EntryPoint::GLVertexAttribL4dv:
+            return "glVertexAttribL4dv";
+        case EntryPoint::GLVertexAttribLFormat:
+            return "glVertexAttribLFormat";
+        case EntryPoint::GLVertexAttribLPointer:
+            return "glVertexAttribLPointer";
+        case EntryPoint::GLVertexAttribP1ui:
+            return "glVertexAttribP1ui";
+        case EntryPoint::GLVertexAttribP1uiv:
+            return "glVertexAttribP1uiv";
+        case EntryPoint::GLVertexAttribP2ui:
+            return "glVertexAttribP2ui";
+        case EntryPoint::GLVertexAttribP2uiv:
+            return "glVertexAttribP2uiv";
+        case EntryPoint::GLVertexAttribP3ui:
+            return "glVertexAttribP3ui";
+        case EntryPoint::GLVertexAttribP3uiv:
+            return "glVertexAttribP3uiv";
+        case EntryPoint::GLVertexAttribP4ui:
+            return "glVertexAttribP4ui";
+        case EntryPoint::GLVertexAttribP4uiv:
+            return "glVertexAttribP4uiv";
+        case EntryPoint::GLVertexAttribPointer:
+            return "glVertexAttribPointer";
+        case EntryPoint::GLVertexBindingDivisor:
+            return "glVertexBindingDivisor";
+        case EntryPoint::GLVertexP2ui:
+            return "glVertexP2ui";
+        case EntryPoint::GLVertexP2uiv:
+            return "glVertexP2uiv";
+        case EntryPoint::GLVertexP3ui:
+            return "glVertexP3ui";
+        case EntryPoint::GLVertexP3uiv:
+            return "glVertexP3uiv";
+        case EntryPoint::GLVertexP4ui:
+            return "glVertexP4ui";
+        case EntryPoint::GLVertexP4uiv:
+            return "glVertexP4uiv";
+        case EntryPoint::GLVertexPointer:
+            return "glVertexPointer";
+        case EntryPoint::GLViewport:
+            return "glViewport";
+        case EntryPoint::GLViewportArrayv:
+            return "glViewportArrayv";
+        case EntryPoint::GLViewportIndexedf:
+            return "glViewportIndexedf";
+        case EntryPoint::GLViewportIndexedfv:
+            return "glViewportIndexedfv";
+        case EntryPoint::GLWaitSemaphoreEXT:
+            return "glWaitSemaphoreEXT";
+        case EntryPoint::GLWaitSync:
+            return "glWaitSync";
+        case EntryPoint::GLWeightPointerOES:
+            return "glWeightPointerOES";
+        case EntryPoint::GLWindowPos2d:
+            return "glWindowPos2d";
+        case EntryPoint::GLWindowPos2dv:
+            return "glWindowPos2dv";
+        case EntryPoint::GLWindowPos2f:
+            return "glWindowPos2f";
+        case EntryPoint::GLWindowPos2fv:
+            return "glWindowPos2fv";
+        case EntryPoint::GLWindowPos2i:
+            return "glWindowPos2i";
+        case EntryPoint::GLWindowPos2iv:
+            return "glWindowPos2iv";
+        case EntryPoint::GLWindowPos2s:
+            return "glWindowPos2s";
+        case EntryPoint::GLWindowPos2sv:
+            return "glWindowPos2sv";
+        case EntryPoint::GLWindowPos3d:
+            return "glWindowPos3d";
+        case EntryPoint::GLWindowPos3dv:
+            return "glWindowPos3dv";
+        case EntryPoint::GLWindowPos3f:
+            return "glWindowPos3f";
+        case EntryPoint::GLWindowPos3fv:
+            return "glWindowPos3fv";
+        case EntryPoint::GLWindowPos3i:
+            return "glWindowPos3i";
+        case EntryPoint::GLWindowPos3iv:
+            return "glWindowPos3iv";
+        case EntryPoint::GLWindowPos3s:
+            return "glWindowPos3s";
+        case EntryPoint::GLWindowPos3sv:
+            return "glWindowPos3sv";
+        case EntryPoint::WGLChoosePixelFormat:
+            return "wglChoosePixelFormat";
+        case EntryPoint::WGLCopyContext:
+            return "wglCopyContext";
+        case EntryPoint::WGLCreateContext:
+            return "wglCreateContext";
+        case EntryPoint::WGLCreateLayerContext:
+            return "wglCreateLayerContext";
+        case EntryPoint::WGLDeleteContext:
+            return "wglDeleteContext";
+        case EntryPoint::WGLDescribeLayerPlane:
+            return "wglDescribeLayerPlane";
+        case EntryPoint::WGLDescribePixelFormat:
+            return "wglDescribePixelFormat";
+        case EntryPoint::WGLGetCurrentContext:
+            return "wglGetCurrentContext";
+        case EntryPoint::WGLGetCurrentDC:
+            return "wglGetCurrentDC";
+        case EntryPoint::WGLGetEnhMetaFilePixelFormat:
+            return "wglGetEnhMetaFilePixelFormat";
+        case EntryPoint::WGLGetLayerPaletteEntries:
+            return "wglGetLayerPaletteEntries";
+        case EntryPoint::WGLGetPixelFormat:
+            return "wglGetPixelFormat";
+        case EntryPoint::WGLGetProcAddress:
+            return "wglGetProcAddress";
+        case EntryPoint::WGLMakeCurrent:
+            return "wglMakeCurrent";
+        case EntryPoint::WGLRealizeLayerPalette:
+            return "wglRealizeLayerPalette";
+        case EntryPoint::WGLSetLayerPaletteEntries:
+            return "wglSetLayerPaletteEntries";
+        case EntryPoint::WGLSetPixelFormat:
+            return "wglSetPixelFormat";
+        case EntryPoint::WGLShareLists:
+            return "wglShareLists";
+        case EntryPoint::WGLSwapBuffers:
+            return "wglSwapBuffers";
+        case EntryPoint::WGLSwapLayerBuffers:
+            return "wglSwapLayerBuffers";
+        case EntryPoint::WGLUseFontBitmaps:
+            return "wglUseFontBitmaps";
+        case EntryPoint::WGLUseFontBitmapsA:
+            return "wglUseFontBitmapsA";
+        case EntryPoint::WGLUseFontBitmapsW:
+            return "wglUseFontBitmapsW";
+        case EntryPoint::WGLUseFontOutlines:
+            return "wglUseFontOutlines";
+        case EntryPoint::WGLUseFontOutlinesA:
+            return "wglUseFontOutlinesA";
+        case EntryPoint::WGLUseFontOutlinesW:
+            return "wglUseFontOutlinesW";
+        default:
+            UNREACHABLE();
+            return "error";
+    }
+}
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/entry_points_enum_autogen.h b/gfx/angle/checkout/src/common/entry_points_enum_autogen.h
new file mode 100644
index 0000000000..61c5c76f58
--- /dev/null
+++ b/gfx/angle/checkout/src/common/entry_points_enum_autogen.h
@@ -0,0 +1,1736 @@
+// GENERATED FILE - DO NOT EDIT.
+// Generated by generate_entry_points.py using data from gl.xml and gl_angle_ext.xml.
+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// entry_points_enum_autogen.h:
+//   Defines the GL/GLES entry points enumeration.
+
+#ifndef COMMON_ENTRYPOINTSENUM_AUTOGEN_H_
+#define COMMON_ENTRYPOINTSENUM_AUTOGEN_H_
+
+namespace angle
+{
+enum class EntryPoint
+{
+    CLBuildProgram,
+    CLCloneKernel,
+    CLCompileProgram,
+    CLCreateBuffer,
+    CLCreateBufferWithProperties,
+    CLCreateCommandQueue,
+    CLCreateCommandQueueWithProperties,
+    CLCreateContext,
+    CLCreateContextFromType,
+    CLCreateImage,
+    CLCreateImage2D,
+    CLCreateImage3D,
+    CLCreateImageWithProperties,
+    CLCreateKernel,
+    CLCreateKernelsInProgram,
+    CLCreatePipe,
+    CLCreateProgramWithBinary,
+    CLCreateProgramWithBuiltInKernels,
+    CLCreateProgramWithIL,
+    CLCreateProgramWithSource,
+    CLCreateSampler,
+    CLCreateSamplerWithProperties,
+    CLCreateSubBuffer,
+    CLCreateSubDevices,
+    CLCreateUserEvent,
+    CLEnqueueBarrier,
+    CLEnqueueBarrierWithWaitList,
+    CLEnqueueCopyBuffer,
+    CLEnqueueCopyBufferRect,
+    CLEnqueueCopyBufferToImage,
+    CLEnqueueCopyImage,
+    CLEnqueueCopyImageToBuffer,
+    CLEnqueueFillBuffer,
+    CLEnqueueFillImage,
+    CLEnqueueMapBuffer,
+    CLEnqueueMapImage,
+    CLEnqueueMarker,
+    CLEnqueueMarkerWithWaitList,
+    CLEnqueueMigrateMemObjects,
+    CLEnqueueNDRangeKernel,
+    CLEnqueueNativeKernel,
+    CLEnqueueReadBuffer,
+    CLEnqueueReadBufferRect,
+    CLEnqueueReadImage,
+    CLEnqueueSVMFree,
+    CLEnqueueSVMMap,
+    CLEnqueueSVMMemFill,
+    CLEnqueueSVMMemcpy,
+    CLEnqueueSVMMigrateMem,
+    CLEnqueueSVMUnmap,
+    CLEnqueueTask,
+    CLEnqueueUnmapMemObject,
+    CLEnqueueWaitForEvents,
+    CLEnqueueWriteBuffer,
+    CLEnqueueWriteBufferRect,
+    CLEnqueueWriteImage,
+    CLFinish,
+    CLFlush,
+    CLGetCommandQueueInfo,
+    CLGetContextInfo,
+    CLGetDeviceAndHostTimer,
+    CLGetDeviceIDs,
+    CLGetDeviceInfo,
+    CLGetEventInfo,
+    CLGetEventProfilingInfo,
+    CLGetExtensionFunctionAddress,
+    CLGetExtensionFunctionAddressForPlatform,
+    CLGetHostTimer,
+    CLGetImageInfo,
+    CLGetKernelArgInfo,
+    CLGetKernelInfo,
+    CLGetKernelSubGroupInfo,
+    CLGetKernelWorkGroupInfo,
+    CLGetMemObjectInfo,
+    CLGetPipeInfo,
+    CLGetPlatformIDs,
+    CLGetPlatformInfo,
+    CLGetProgramBuildInfo,
+    CLGetProgramInfo,
+    CLGetSamplerInfo,
+    CLGetSupportedImageFormats,
+    CLIcdGetPlatformIDsKHR,
+    CLLinkProgram,
+    CLReleaseCommandQueue,
+    CLReleaseContext,
+    CLReleaseDevice,
+    CLReleaseEvent,
+    CLReleaseKernel,
+    CLReleaseMemObject,
+    CLReleaseProgram,
+    CLReleaseSampler,
+    CLRetainCommandQueue,
+    CLRetainContext,
+    CLRetainDevice,
+    CLRetainEvent,
+    CLRetainKernel,
+    CLRetainMemObject,
+    CLRetainProgram,
+    CLRetainSampler,
+    CLSVMAlloc,
+    CLSVMFree,
+    CLSetCommandQueueProperty,
+    CLSetContextDestructorCallback,
+    CLSetDefaultDeviceCommandQueue,
+    CLSetEventCallback,
+    CLSetKernelArg,
+    CLSetKernelArgSVMPointer,
+    CLSetKernelExecInfo,
+    CLSetMemObjectDestructorCallback,
+    CLSetProgramReleaseCallback,
+    CLSetProgramSpecializationConstant,
+    CLSetUserEventStatus,
+    CLUnloadCompiler,
+    CLUnloadPlatformCompiler,
+    CLWaitForEvents,
+    EGLBindAPI,
+    EGLBindTexImage,
+    EGLChooseConfig,
+    EGLClientWaitSync,
+    EGLClientWaitSyncKHR,
+    EGLCopyBuffers,
+    EGLCopyMetalSharedEventANGLE,
+    EGLCreateContext,
+    EGLCreateDeviceANGLE,
+    EGLCreateImage,
+    EGLCreateImageKHR,
+    EGLCreateNativeClientBufferANDROID,
+    EGLCreatePbufferFromClientBuffer,
+    EGLCreatePbufferSurface,
+    EGLCreatePixmapSurface,
+    EGLCreatePlatformPixmapSurface,
+    EGLCreatePlatformPixmapSurfaceEXT,
+    EGLCreatePlatformWindowSurface,
+    EGLCreatePlatformWindowSurfaceEXT,
+    EGLCreateStreamKHR,
+    EGLCreateStreamProducerD3DTextureANGLE,
+    EGLCreateSync,
+    EGLCreateSyncKHR,
+    EGLCreateWindowSurface,
+    EGLDebugMessageControlKHR,
+    EGLDestroyContext,
+    EGLDestroyImage,
+    EGLDestroyImageKHR,
+    EGLDestroyStreamKHR,
+    EGLDestroySurface,
+    EGLDestroySync,
+    EGLDestroySyncKHR,
+    EGLDupNativeFenceFDANDROID,
+    EGLExportVkImageANGLE,
+    EGLForceGPUSwitchANGLE,
+    EGLGetCompositorTimingANDROID,
+    EGLGetCompositorTimingSupportedANDROID,
+    EGLGetConfigAttrib,
+    EGLGetConfigs,
+    EGLGetCurrentContext,
+    EGLGetCurrentDisplay,
+    EGLGetCurrentSurface,
+    EGLGetDisplay,
+    EGLGetError,
+    EGLGetFrameTimestampSupportedANDROID,
+    EGLGetFrameTimestampsANDROID,
+    EGLGetMscRateANGLE,
+    EGLGetNativeClientBufferANDROID,
+    EGLGetNextFrameIdANDROID,
+    EGLGetPlatformDisplay,
+    EGLGetPlatformDisplayEXT,
+    EGLGetProcAddress,
+    EGLGetSyncAttrib,
+    EGLGetSyncAttribKHR,
+    EGLGetSyncValuesCHROMIUM,
+    EGLHandleGPUSwitchANGLE,
+    EGLInitialize,
+    EGLLabelObjectKHR,
+    EGLLockSurfaceKHR,
+    EGLMakeCurrent,
+    EGLPostSubBufferNV,
+    EGLPrepareSwapBuffersANGLE,
+    EGLPresentationTimeANDROID,
+    EGLProgramCacheGetAttribANGLE,
+    EGLProgramCachePopulateANGLE,
+    EGLProgramCacheQueryANGLE,
+    EGLProgramCacheResizeANGLE,
+    EGLQueryAPI,
+    EGLQueryContext,
+    EGLQueryDebugKHR,
+    EGLQueryDeviceAttribEXT,
+    EGLQueryDeviceStringEXT,
+    EGLQueryDisplayAttribANGLE,
+    EGLQueryDisplayAttribEXT,
+    EGLQueryDmaBufFormatsEXT,
+    EGLQueryDmaBufModifiersEXT,
+    EGLQueryStreamKHR,
+    EGLQueryStreamu64KHR,
+    EGLQueryString,
+    EGLQueryStringiANGLE,
+    EGLQuerySurface,
+    EGLQuerySurface64KHR,
+    EGLQuerySurfacePointerANGLE,
+    EGLReacquireHighPowerGPUANGLE,
+    EGLReleaseDeviceANGLE,
+    EGLReleaseHighPowerGPUANGLE,
+    EGLReleaseTexImage,
+    EGLReleaseThread,
+    EGLSetBlobCacheFuncsANDROID,
+    EGLSetDamageRegionKHR,
+    EGLSignalSyncKHR,
+    EGLStreamAttribKHR,
+    EGLStreamConsumerAcquireKHR,
+    EGLStreamConsumerGLTextureExternalAttribsNV,
+    EGLStreamConsumerGLTextureExternalKHR,
+    EGLStreamConsumerReleaseKHR,
+    EGLStreamPostD3DTextureANGLE,
+    EGLSurfaceAttrib,
+    EGLSwapBuffers,
+    EGLSwapBuffersWithDamageKHR,
+    EGLSwapBuffersWithFrameTokenANGLE,
+    EGLSwapInterval,
+    EGLTerminate,
+    EGLUnlockSurfaceKHR,
+    EGLWaitClient,
+    EGLWaitGL,
+    EGLWaitNative,
+    EGLWaitSync,
+    EGLWaitSyncKHR,
+    GLAccum,
+    GLAcquireTexturesANGLE,
+    GLActiveShaderProgram,
+    GLActiveShaderProgramEXT,
+    GLActiveTexture,
+    GLAlphaFunc,
+    GLAlphaFuncx,
+    GLAreTexturesResident,
+    GLArrayElement,
+    GLAttachShader,
+    GLBegin,
+    GLBeginConditionalRender,
+    GLBeginPerfMonitorAMD,
+    GLBeginPixelLocalStorageANGLE,
+    GLBeginQuery,
+    GLBeginQueryEXT,
+    GLBeginQueryIndexed,
+    GLBeginTransformFeedback,
+    GLBindAttribLocation,
+    GLBindBuffer,
+    GLBindBufferBase,
+    GLBindBufferRange,
+    GLBindBuffersBase,
+    GLBindBuffersRange,
+    GLBindFragDataLocation,
+    GLBindFragDataLocationEXT,
+    GLBindFragDataLocationIndexed,
+    GLBindFragDataLocationIndexedEXT,
+    GLBindFramebuffer,
+    GLBindFramebufferOES,
+    GLBindImageTexture,
+    GLBindImageTextures,
+    GLBindProgramPipeline,
+    GLBindProgramPipelineEXT,
+    GLBindRenderbuffer,
+    GLBindRenderbufferOES,
+    GLBindSampler,
+    GLBindSamplers,
+    GLBindTexture,
+    GLBindTextureUnit,
+    GLBindTextures,
+    GLBindTransformFeedback,
+    GLBindUniformLocationCHROMIUM,
+    GLBindVertexArray,
+    GLBindVertexArrayOES,
+    GLBindVertexBuffer,
+    GLBindVertexBuffers,
+    GLBitmap,
+    GLBlendBarrier,
+    GLBlendBarrierKHR,
+    GLBlendColor,
+    GLBlendEquation,
+    GLBlendEquationSeparate,
+    GLBlendEquationSeparatei,
+    GLBlendEquationSeparateiEXT,
+    GLBlendEquationSeparateiOES,
+    GLBlendEquationi,
+    GLBlendEquationiEXT,
+    GLBlendEquationiOES,
+    GLBlendFunc,
+    GLBlendFuncSeparate,
+    GLBlendFuncSeparatei,
+    GLBlendFuncSeparateiEXT,
+    GLBlendFuncSeparateiOES,
+    GLBlendFunci,
+    GLBlendFunciEXT,
+    GLBlendFunciOES,
+    GLBlitFramebuffer,
+    GLBlitFramebufferANGLE,
+    GLBlitFramebufferNV,
+    GLBlitNamedFramebuffer,
+    GLBufferData,
+    GLBufferStorage,
+    GLBufferStorageEXT,
+    GLBufferStorageExternalEXT,
+    GLBufferStorageMemEXT,
+    GLBufferSubData,
+    GLCallList,
+    GLCallLists,
+    GLCheckFramebufferStatus,
+    GLCheckFramebufferStatusOES,
+    GLCheckNamedFramebufferStatus,
+    GLClampColor,
+    GLClear,
+    GLClearAccum,
+    GLClearBufferData,
+    GLClearBufferSubData,
+    GLClearBufferfi,
+    GLClearBufferfv,
+    GLClearBufferiv,
+    GLClearBufferuiv,
+    GLClearColor,
+    GLClearColorx,
+    GLClearDepth,
+    GLClearDepthf,
+    GLClearDepthx,
+    GLClearIndex,
+    GLClearNamedBufferData,
+    GLClearNamedBufferSubData,
+    GLClearNamedFramebufferfi,
+    GLClearNamedFramebufferfv,
+    GLClearNamedFramebufferiv,
+    GLClearNamedFramebufferuiv,
+    GLClearStencil,
+    GLClearTexImage,
+    GLClearTexSubImage,
+    GLClientActiveTexture,
+    GLClientWaitSync,
+    GLClipControl,
+    GLClipControlEXT,
+    GLClipPlane,
+    GLClipPlanef,
+    GLClipPlanex,
+    GLColor3b,
+    GLColor3bv,
+    GLColor3d,
+    GLColor3dv,
+    GLColor3f,
+    GLColor3fv,
+    GLColor3i,
+    GLColor3iv,
+    GLColor3s,
+    GLColor3sv,
+    GLColor3ub,
+    GLColor3ubv,
+    GLColor3ui,
+    GLColor3uiv,
+    GLColor3us,
+    GLColor3usv,
+    GLColor4b,
+    GLColor4bv,
+    GLColor4d,
+    GLColor4dv,
+    GLColor4f,
+    GLColor4fv,
+    GLColor4i,
+    GLColor4iv,
+    GLColor4s,
+    GLColor4sv,
+    GLColor4ub,
+    GLColor4ubv,
+    GLColor4ui,
+    GLColor4uiv,
+    GLColor4us,
+    GLColor4usv,
+    GLColor4x,
+    GLColorMask,
+    GLColorMaski,
+    GLColorMaskiEXT,
+    GLColorMaskiOES,
+    GLColorMaterial,
+    GLColorP3ui,
+    GLColorP3uiv,
+    GLColorP4ui,
+    GLColorP4uiv,
+    GLColorPointer,
+    GLCompileShader,
+    GLCompressedCopyTextureCHROMIUM,
+    GLCompressedTexImage1D,
+    GLCompressedTexImage2D,
+    GLCompressedTexImage2DRobustANGLE,
+    GLCompressedTexImage3D,
+    GLCompressedTexImage3DOES,
+    GLCompressedTexImage3DRobustANGLE,
+    GLCompressedTexSubImage1D,
+    GLCompressedTexSubImage2D,
+    GLCompressedTexSubImage2DRobustANGLE,
+    GLCompressedTexSubImage3D,
+    GLCompressedTexSubImage3DOES,
+    GLCompressedTexSubImage3DRobustANGLE,
+    GLCompressedTextureSubImage1D,
+    GLCompressedTextureSubImage2D,
+    GLCompressedTextureSubImage3D,
+    GLCopyBufferSubData,
+    GLCopyImageSubData,
+    GLCopyImageSubDataEXT,
+    GLCopyImageSubDataOES,
+    GLCopyNamedBufferSubData,
+    GLCopyPixels,
+    GLCopySubTexture3DANGLE,
+    GLCopySubTextureCHROMIUM,
+    GLCopyTexImage1D,
+    GLCopyTexImage2D,
+    GLCopyTexSubImage1D,
+    GLCopyTexSubImage2D,
+    GLCopyTexSubImage3D,
+    GLCopyTexSubImage3DOES,
+    GLCopyTexture3DANGLE,
+    GLCopyTextureCHROMIUM,
+    GLCopyTextureSubImage1D,
+    GLCopyTextureSubImage2D,
+    GLCopyTextureSubImage3D,
+    GLCoverageModulationCHROMIUM,
+    GLCreateBuffers,
+    GLCreateFramebuffers,
+    GLCreateMemoryObjectsEXT,
+    GLCreateProgram,
+    GLCreateProgramPipelines,
+    GLCreateQueries,
+    GLCreateRenderbuffers,
+    GLCreateSamplers,
+    GLCreateShader,
+    GLCreateShaderProgramv,
+    GLCreateShaderProgramvEXT,
+    GLCreateTextures,
+    GLCreateTransformFeedbacks,
+    GLCreateVertexArrays,
+    GLCullFace,
+    GLCurrentPaletteMatrixOES,
+    GLDebugMessageCallback,
+    GLDebugMessageCallbackKHR,
+    GLDebugMessageControl,
+    GLDebugMessageControlKHR,
+    GLDebugMessageInsert,
+    GLDebugMessageInsertKHR,
+    GLDeleteBuffers,
+    GLDeleteFencesNV,
+    GLDeleteFramebuffers,
+    GLDeleteFramebuffersOES,
+    GLDeleteLists,
+    GLDeleteMemoryObjectsEXT,
+    GLDeletePerfMonitorsAMD,
+    GLDeleteProgram,
+    GLDeleteProgramPipelines,
+    GLDeleteProgramPipelinesEXT,
+    GLDeleteQueries,
+    GLDeleteQueriesEXT,
+    GLDeleteRenderbuffers,
+    GLDeleteRenderbuffersOES,
+    GLDeleteSamplers,
+    GLDeleteSemaphoresEXT,
+    GLDeleteShader,
+    GLDeleteSync,
+    GLDeleteTextures,
+    GLDeleteTransformFeedbacks,
+    GLDeleteVertexArrays,
+    GLDeleteVertexArraysOES,
+    GLDepthFunc,
+    GLDepthMask,
+    GLDepthRange,
+    GLDepthRangeArrayv,
+    GLDepthRangeIndexed,
+    GLDepthRangef,
+    GLDepthRangex,
+    GLDetachShader,
+    GLDisable,
+    GLDisableClientState,
+    GLDisableExtensionANGLE,
+    GLDisableVertexArrayAttrib,
+    GLDisableVertexAttribArray,
+    GLDisablei,
+    GLDisableiEXT,
+    GLDisableiOES,
+    GLDiscardFramebufferEXT,
+    GLDispatchCompute,
+    GLDispatchComputeIndirect,
+    GLDrawArrays,
+    GLDrawArraysIndirect,
+    GLDrawArraysInstanced,
+    GLDrawArraysInstancedANGLE,
+    GLDrawArraysInstancedBaseInstance,
+    GLDrawArraysInstancedBaseInstanceANGLE,
+    GLDrawArraysInstancedBaseInstanceEXT,
+    GLDrawArraysInstancedEXT,
+    GLDrawBuffer,
+    GLDrawBuffers,
+    GLDrawBuffersEXT,
+    GLDrawElements,
+    GLDrawElementsBaseVertex,
+    GLDrawElementsBaseVertexEXT,
+    GLDrawElementsBaseVertexOES,
+    GLDrawElementsIndirect,
+    GLDrawElementsInstanced,
+    GLDrawElementsInstancedANGLE,
+    GLDrawElementsInstancedBaseInstance,
+    GLDrawElementsInstancedBaseInstanceEXT,
+    GLDrawElementsInstancedBaseVertex,
+    GLDrawElementsInstancedBaseVertexBaseInstance,
+    GLDrawElementsInstancedBaseVertexBaseInstanceANGLE,
+    GLDrawElementsInstancedBaseVertexBaseInstanceEXT,
+    GLDrawElementsInstancedBaseVertexEXT,
+    GLDrawElementsInstancedBaseVertexOES,
+    GLDrawElementsInstancedEXT,
+    GLDrawPixels,
+    GLDrawRangeElements,
+    GLDrawRangeElementsBaseVertex,
+    GLDrawRangeElementsBaseVertexEXT,
+    GLDrawRangeElementsBaseVertexOES,
+    GLDrawTexfOES,
+    GLDrawTexfvOES,
+    GLDrawTexiOES,
+    GLDrawTexivOES,
+    GLDrawTexsOES,
+    GLDrawTexsvOES,
+    GLDrawTexxOES,
+    GLDrawTexxvOES,
+    GLDrawTransformFeedback,
+    GLDrawTransformFeedbackInstanced,
+    GLDrawTransformFeedbackStream,
+    GLDrawTransformFeedbackStreamInstanced,
+    GLEGLImageTargetRenderbufferStorageOES,
+    GLEGLImageTargetTexStorageEXT,
+    GLEGLImageTargetTexture2DOES,
+    GLEGLImageTargetTextureStorageEXT,
+    GLEdgeFlag,
+    GLEdgeFlagPointer,
+    GLEdgeFlagv,
+    GLEnable,
+    GLEnableClientState,
+    GLEnableVertexArrayAttrib,
+    GLEnableVertexAttribArray,
+    GLEnablei,
+    GLEnableiEXT,
+    GLEnableiOES,
+    GLEnd,
+    GLEndConditionalRender,
+    GLEndList,
+    GLEndPerfMonitorAMD,
+    GLEndPixelLocalStorageANGLE,
+    GLEndQuery,
+    GLEndQueryEXT,
+    GLEndQueryIndexed,
+    GLEndTransformFeedback,
+    GLEvalCoord1d,
+    GLEvalCoord1dv,
+    GLEvalCoord1f,
+    GLEvalCoord1fv,
+    GLEvalCoord2d,
+    GLEvalCoord2dv,
+    GLEvalCoord2f,
+    GLEvalCoord2fv,
+    GLEvalMesh1,
+    GLEvalMesh2,
+    GLEvalPoint1,
+    GLEvalPoint2,
+    GLFeedbackBuffer,
+    GLFenceSync,
+    GLFinish,
+    GLFinishFenceNV,
+    GLFlush,
+    GLFlushMappedBufferRange,
+    GLFlushMappedBufferRangeEXT,
+    GLFlushMappedNamedBufferRange,
+    GLFogCoordPointer,
+    GLFogCoordd,
+    GLFogCoorddv,
+    GLFogCoordf,
+    GLFogCoordfv,
+    GLFogf,
+    GLFogfv,
+    GLFogi,
+    GLFogiv,
+    GLFogx,
+    GLFogxv,
+    GLFramebufferFetchBarrierEXT,
+    GLFramebufferMemorylessPixelLocalStorageANGLE,
+    GLFramebufferParameteri,
+    GLFramebufferParameteriMESA,
+    GLFramebufferRenderbuffer,
+    GLFramebufferRenderbufferOES,
+    GLFramebufferTexture,
+    GLFramebufferTexture1D,
+    GLFramebufferTexture2D,
+    GLFramebufferTexture2DMultisampleEXT,
+    GLFramebufferTexture2DOES,
+    GLFramebufferTexture3D,
+    GLFramebufferTexture3DOES,
+    GLFramebufferTextureEXT,
+    GLFramebufferTextureLayer,
+    GLFramebufferTextureMultiviewOVR,
+    GLFramebufferTextureOES,
+    GLFramebufferTexturePixelLocalStorageANGLE,
+    GLFrontFace,
+    GLFrustum,
+    GLFrustumf,
+    GLFrustumx,
+    GLGenBuffers,
+    GLGenFencesNV,
+    GLGenFramebuffers,
+    GLGenFramebuffersOES,
+    GLGenLists,
+    GLGenPerfMonitorsAMD,
+    GLGenProgramPipelines,
+    GLGenProgramPipelinesEXT,
+    GLGenQueries,
+    GLGenQueriesEXT,
+    GLGenRenderbuffers,
+    GLGenRenderbuffersOES,
+    GLGenSamplers,
+    GLGenSemaphoresEXT,
+    GLGenTextures,
+    GLGenTransformFeedbacks,
+    GLGenVertexArrays,
+    GLGenVertexArraysOES,
+    GLGenerateMipmap,
+    GLGenerateMipmapOES,
+    GLGenerateTextureMipmap,
+    GLGetActiveAtomicCounterBufferiv,
+    GLGetActiveAttrib,
+    GLGetActiveSubroutineName,
+    GLGetActiveSubroutineUniformName,
+    GLGetActiveSubroutineUniformiv,
+    GLGetActiveUniform,
+    GLGetActiveUniformBlockName,
+    GLGetActiveUniformBlockiv,
+    GLGetActiveUniformBlockivRobustANGLE,
+    GLGetActiveUniformName,
+    GLGetActiveUniformsiv,
+    GLGetAttachedShaders,
+    GLGetAttribLocation,
+    GLGetBooleani_v,
+    GLGetBooleani_vRobustANGLE,
+    GLGetBooleanv,
+    GLGetBooleanvRobustANGLE,
+    GLGetBufferParameteri64v,
+    GLGetBufferParameteri64vRobustANGLE,
+    GLGetBufferParameteriv,
+    GLGetBufferParameterivRobustANGLE,
+    GLGetBufferPointerv,
+    GLGetBufferPointervOES,
+    GLGetBufferPointervRobustANGLE,
+    GLGetBufferSubData,
+    GLGetClipPlane,
+    GLGetClipPlanef,
+    GLGetClipPlanex,
+    GLGetCompressedTexImage,
+    GLGetCompressedTexImageANGLE,
+    GLGetCompressedTextureImage,
+    GLGetCompressedTextureSubImage,
+    GLGetDebugMessageLog,
+    GLGetDebugMessageLogKHR,
+    GLGetDoublei_v,
+    GLGetDoublev,
+    GLGetError,
+    GLGetFenceivNV,
+    GLGetFixedv,
+    GLGetFloati_v,
+    GLGetFloatv,
+    GLGetFloatvRobustANGLE,
+    GLGetFragDataIndex,
+    GLGetFragDataIndexEXT,
+    GLGetFragDataLocation,
+    GLGetFramebufferAttachmentParameteriv,
+    GLGetFramebufferAttachmentParameterivOES,
+    GLGetFramebufferAttachmentParameterivRobustANGLE,
+    GLGetFramebufferParameteriv,
+    GLGetFramebufferParameterivMESA,
+    GLGetFramebufferParameterivRobustANGLE,
+    GLGetGraphicsResetStatus,
+    GLGetGraphicsResetStatusEXT,
+    GLGetInteger64i_v,
+    GLGetInteger64i_vRobustANGLE,
+    GLGetInteger64v,
+    GLGetInteger64vEXT,
+    GLGetInteger64vRobustANGLE,
+    GLGetIntegeri_v,
+    GLGetIntegeri_vRobustANGLE,
+    GLGetIntegerv,
+    GLGetIntegervRobustANGLE,
+    GLGetInternalformati64v,
+    GLGetInternalformativ,
+    GLGetInternalformativRobustANGLE,
+    GLGetLightfv,
+    GLGetLightiv,
+    GLGetLightxv,
+    GLGetMapdv,
+    GLGetMapfv,
+    GLGetMapiv,
+    GLGetMaterialfv,
+    GLGetMaterialiv,
+    GLGetMaterialxv,
+    GLGetMemoryObjectParameterivEXT,
+    GLGetMultisamplefv,
+    GLGetMultisamplefvANGLE,
+    GLGetMultisamplefvRobustANGLE,
+    GLGetNamedBufferParameteri64v,
+    GLGetNamedBufferParameteriv,
+    GLGetNamedBufferPointerv,
+    GLGetNamedBufferSubData,
+    GLGetNamedFramebufferAttachmentParameteriv,
+    GLGetNamedFramebufferParameteriv,
+    GLGetNamedRenderbufferParameteriv,
+    GLGetObjectLabel,
+    GLGetObjectLabelEXT,
+    GLGetObjectLabelKHR,
+    GLGetObjectPtrLabel,
+    GLGetObjectPtrLabelKHR,
+    GLGetPerfMonitorCounterDataAMD,
+    GLGetPerfMonitorCounterInfoAMD,
+    GLGetPerfMonitorCounterStringAMD,
+    GLGetPerfMonitorCountersAMD,
+    GLGetPerfMonitorGroupStringAMD,
+    GLGetPerfMonitorGroupsAMD,
+    GLGetPixelMapfv,
+    GLGetPixelMapuiv,
+    GLGetPixelMapusv,
+    GLGetPointerv,
+    GLGetPointervKHR,
+    GLGetPointervRobustANGLERobustANGLE,
+    GLGetPolygonStipple,
+    GLGetProgramBinary,
+    GLGetProgramBinaryOES,
+    GLGetProgramInfoLog,
+    GLGetProgramInterfaceiv,
+    GLGetProgramInterfaceivRobustANGLE,
+    GLGetProgramPipelineInfoLog,
+    GLGetProgramPipelineInfoLogEXT,
+    GLGetProgramPipelineiv,
+    GLGetProgramPipelineivEXT,
+    GLGetProgramResourceIndex,
+    GLGetProgramResourceLocation,
+    GLGetProgramResourceLocationIndex,
+    GLGetProgramResourceLocationIndexEXT,
+    GLGetProgramResourceName,
+    GLGetProgramResourceiv,
+    GLGetProgramStageiv,
+    GLGetProgramiv,
+    GLGetProgramivRobustANGLE,
+    GLGetQueryBufferObjecti64v,
+    GLGetQueryBufferObjectiv,
+    GLGetQueryBufferObjectui64v,
+    GLGetQueryBufferObjectuiv,
+    GLGetQueryIndexediv,
+    GLGetQueryObjecti64v,
+    GLGetQueryObjecti64vEXT,
+    GLGetQueryObjecti64vRobustANGLE,
+    GLGetQueryObjectiv,
+    GLGetQueryObjectivEXT,
+    GLGetQueryObjectivRobustANGLE,
+    GLGetQueryObjectui64v,
+    GLGetQueryObjectui64vEXT,
+    GLGetQueryObjectui64vRobustANGLE,
+    GLGetQueryObjectuiv,
+    GLGetQueryObjectuivEXT,
+    GLGetQueryObjectuivRobustANGLE,
+    GLGetQueryiv,
+    GLGetQueryivEXT,
+    GLGetQueryivRobustANGLE,
+    GLGetRenderbufferImageANGLE,
+    GLGetRenderbufferParameteriv,
+    GLGetRenderbufferParameterivOES,
+    GLGetRenderbufferParameterivRobustANGLE,
+    GLGetSamplerParameterIiv,
+    GLGetSamplerParameterIivEXT,
+    GLGetSamplerParameterIivOES,
+    GLGetSamplerParameterIivRobustANGLE,
+    GLGetSamplerParameterIuiv,
+    GLGetSamplerParameterIuivEXT,
+    GLGetSamplerParameterIuivOES,
+    GLGetSamplerParameterIuivRobustANGLE,
+    GLGetSamplerParameterfv,
+    GLGetSamplerParameterfvRobustANGLE,
+    GLGetSamplerParameteriv,
+    GLGetSamplerParameterivRobustANGLE,
+    GLGetSemaphoreParameterui64vEXT,
+    GLGetShaderInfoLog,
+    GLGetShaderPrecisionFormat,
+    GLGetShaderSource,
+    GLGetShaderiv,
+    GLGetShaderivRobustANGLE,
+    GLGetString,
+    GLGetStringi,
+    GLGetSubroutineIndex,
+    GLGetSubroutineUniformLocation,
+    GLGetSynciv,
+    GLGetTexEnvfv,
+    GLGetTexEnviv,
+    GLGetTexEnvxv,
+    GLGetTexGendv,
+    GLGetTexGenfv,
+    GLGetTexGenfvOES,
+    GLGetTexGeniv,
+    GLGetTexGenivOES,
+    GLGetTexGenxvOES,
+    GLGetTexImage,
+    GLGetTexImageANGLE,
+    GLGetTexLevelParameterfv,
+    GLGetTexLevelParameterfvANGLE,
+    GLGetTexLevelParameterfvRobustANGLE,
+    GLGetTexLevelParameteriv,
+    GLGetTexLevelParameterivANGLE,
+    GLGetTexLevelParameterivRobustANGLE,
+    GLGetTexParameterIiv,
+    GLGetTexParameterIivEXT,
+    GLGetTexParameterIivOES,
+    GLGetTexParameterIivRobustANGLE,
+    GLGetTexParameterIuiv,
+    GLGetTexParameterIuivEXT,
+    GLGetTexParameterIuivOES,
+    GLGetTexParameterIuivRobustANGLE,
+    GLGetTexParameterfv,
+    GLGetTexParameterfvRobustANGLE,
+    GLGetTexParameteriv,
+    GLGetTexParameterivRobustANGLE,
+    GLGetTexParameterxv,
+    GLGetTextureImage,
+    GLGetTextureLevelParameterfv,
+    GLGetTextureLevelParameteriv,
+    GLGetTextureParameterIiv,
+    GLGetTextureParameterIuiv,
+    GLGetTextureParameterfv,
+    GLGetTextureParameteriv,
+    GLGetTextureSubImage,
+    GLGetTransformFeedbackVarying,
+    GLGetTransformFeedbacki64_v,
+    GLGetTransformFeedbacki_v,
+    GLGetTransformFeedbackiv,
+    GLGetTranslatedShaderSourceANGLE,
+    GLGetUniformBlockIndex,
+    GLGetUniformIndices,
+    GLGetUniformLocation,
+    GLGetUniformSubroutineuiv,
+    GLGetUniformdv,
+    GLGetUniformfv,
+    GLGetUniformfvRobustANGLE,
+    GLGetUniformiv,
+    GLGetUniformivRobustANGLE,
+    GLGetUniformuiv,
+    GLGetUniformuivRobustANGLE,
+    GLGetUnsignedBytei_vEXT,
+    GLGetUnsignedBytevEXT,
+    GLGetVertexArrayIndexed64iv,
+    GLGetVertexArrayIndexediv,
+    GLGetVertexArrayiv,
+    GLGetVertexAttribIiv,
+    GLGetVertexAttribIivRobustANGLE,
+    GLGetVertexAttribIuiv,
+    GLGetVertexAttribIuivRobustANGLE,
+    GLGetVertexAttribLdv,
+    GLGetVertexAttribPointerv,
+    GLGetVertexAttribPointervRobustANGLE,
+    GLGetVertexAttribdv,
+    GLGetVertexAttribfv,
+    GLGetVertexAttribfvRobustANGLE,
+    GLGetVertexAttribiv,
+    GLGetVertexAttribivRobustANGLE,
+    GLGetnColorTable,
+    GLGetnCompressedTexImage,
+    GLGetnConvolutionFilter,
+    GLGetnHistogram,
+    GLGetnMapdv,
+    GLGetnMapfv,
+    GLGetnMapiv,
+    GLGetnMinmax,
+    GLGetnPixelMapfv,
+    GLGetnPixelMapuiv,
+    GLGetnPixelMapusv,
+    GLGetnPolygonStipple,
+    GLGetnSeparableFilter,
+    GLGetnTexImage,
+    GLGetnUniformdv,
+    GLGetnUniformfv,
+    GLGetnUniformfvEXT,
+    GLGetnUniformfvRobustANGLE,
+    GLGetnUniformiv,
+    GLGetnUniformivEXT,
+    GLGetnUniformivRobustANGLE,
+    GLGetnUniformuiv,
+    GLGetnUniformuivRobustANGLE,
+    GLHint,
+    GLImportMemoryFdEXT,
+    GLImportMemoryZirconHandleANGLE,
+    GLImportSemaphoreFdEXT,
+    GLImportSemaphoreZirconHandleANGLE,
+    GLIndexMask,
+    GLIndexPointer,
+    GLIndexd,
+    GLIndexdv,
+    GLIndexf,
+    GLIndexfv,
+    GLIndexi,
+    GLIndexiv,
+    GLIndexs,
+    GLIndexsv,
+    GLIndexub,
+    GLIndexubv,
+    GLInitNames,
+    GLInsertEventMarkerEXT,
+    GLInterleavedArrays,
+    GLInvalid,
+    GLInvalidateBufferData,
+    GLInvalidateBufferSubData,
+    GLInvalidateFramebuffer,
+    GLInvalidateNamedFramebufferData,
+    GLInvalidateNamedFramebufferSubData,
+    GLInvalidateSubFramebuffer,
+    GLInvalidateTexImage,
+    GLInvalidateTexSubImage,
+    GLInvalidateTextureANGLE,
+    GLIsBuffer,
+    GLIsEnabled,
+    GLIsEnabledi,
+    GLIsEnablediEXT,
+    GLIsEnablediOES,
+    GLIsFenceNV,
+    GLIsFramebuffer,
+    GLIsFramebufferOES,
+    GLIsList,
+    GLIsMemoryObjectEXT,
+    GLIsProgram,
+    GLIsProgramPipeline,
+    GLIsProgramPipelineEXT,
+    GLIsQuery,
+    GLIsQueryEXT,
+    GLIsRenderbuffer,
+    GLIsRenderbufferOES,
+    GLIsSampler,
+    GLIsSemaphoreEXT,
+    GLIsShader,
+    GLIsSync,
+    GLIsTexture,
+    GLIsTransformFeedback,
+    GLIsVertexArray,
+    GLIsVertexArrayOES,
+    GLLabelObjectEXT,
+    GLLightModelf,
+    GLLightModelfv,
+    GLLightModeli,
+    GLLightModeliv,
+    GLLightModelx,
+    GLLightModelxv,
+    GLLightf,
+    GLLightfv,
+    GLLighti,
+    GLLightiv,
+    GLLightx,
+    GLLightxv,
+    GLLineStipple,
+    GLLineWidth,
+    GLLineWidthx,
+    GLLinkProgram,
+    GLListBase,
+    GLLoadIdentity,
+    GLLoadMatrixd,
+    GLLoadMatrixf,
+    GLLoadMatrixx,
+    GLLoadName,
+    GLLoadPaletteFromModelViewMatrixOES,
+    GLLoadTransposeMatrixd,
+    GLLoadTransposeMatrixf,
+    GLLogicOp,
+    GLLogicOpANGLE,
+    GLLoseContextCHROMIUM,
+    GLMap1d,
+    GLMap1f,
+    GLMap2d,
+    GLMap2f,
+    GLMapBuffer,
+    GLMapBufferOES,
+    GLMapBufferRange,
+    GLMapBufferRangeEXT,
+    GLMapGrid1d,
+    GLMapGrid1f,
+    GLMapGrid2d,
+    GLMapGrid2f,
+    GLMapNamedBuffer,
+    GLMapNamedBufferRange,
+    GLMaterialf,
+    GLMaterialfv,
+    GLMateriali,
+    GLMaterialiv,
+    GLMaterialx,
+    GLMaterialxv,
+    GLMatrixIndexPointerOES,
+    GLMatrixMode,
+    GLMaxShaderCompilerThreadsKHR,
+    GLMemoryBarrier,
+    GLMemoryBarrierByRegion,
+    GLMemoryObjectParameterivEXT,
+    GLMinSampleShading,
+    GLMinSampleShadingOES,
+    GLMultMatrixd,
+    GLMultMatrixf,
+    GLMultMatrixx,
+    GLMultTransposeMatrixd,
+    GLMultTransposeMatrixf,
+    GLMultiDrawArrays,
+    GLMultiDrawArraysANGLE,
+    GLMultiDrawArraysIndirect,
+    GLMultiDrawArraysIndirectCount,
+    GLMultiDrawArraysIndirectEXT,
+    GLMultiDrawArraysInstancedANGLE,
+    GLMultiDrawArraysInstancedBaseInstanceANGLE,
+    GLMultiDrawElements,
+    GLMultiDrawElementsANGLE,
+    GLMultiDrawElementsBaseVertex,
+    GLMultiDrawElementsBaseVertexEXT,
+    GLMultiDrawElementsIndirect,
+    GLMultiDrawElementsIndirectCount,
+    GLMultiDrawElementsIndirectEXT,
+    GLMultiDrawElementsInstancedANGLE,
+    GLMultiDrawElementsInstancedBaseVertexBaseInstanceANGLE,
+    GLMultiTexCoord1d,
+    GLMultiTexCoord1dv,
+    GLMultiTexCoord1f,
+    GLMultiTexCoord1fv,
+    GLMultiTexCoord1i,
+    GLMultiTexCoord1iv,
+    GLMultiTexCoord1s,
+    GLMultiTexCoord1sv,
+    GLMultiTexCoord2d,
+    GLMultiTexCoord2dv,
+    GLMultiTexCoord2f,
+    GLMultiTexCoord2fv,
+    GLMultiTexCoord2i,
+    GLMultiTexCoord2iv,
+    GLMultiTexCoord2s,
+    GLMultiTexCoord2sv,
+    GLMultiTexCoord3d,
+    GLMultiTexCoord3dv,
+    GLMultiTexCoord3f,
+    GLMultiTexCoord3fv,
+    GLMultiTexCoord3i,
+    GLMultiTexCoord3iv,
+    GLMultiTexCoord3s,
+    GLMultiTexCoord3sv,
+    GLMultiTexCoord4d,
+    GLMultiTexCoord4dv,
+    GLMultiTexCoord4f,
+    GLMultiTexCoord4fv,
+    GLMultiTexCoord4i,
+    GLMultiTexCoord4iv,
+    GLMultiTexCoord4s,
+    GLMultiTexCoord4sv,
+    GLMultiTexCoord4x,
+    GLMultiTexCoordP1ui,
+    GLMultiTexCoordP1uiv,
+    GLMultiTexCoordP2ui,
+    GLMultiTexCoordP2uiv,
+    GLMultiTexCoordP3ui,
+    GLMultiTexCoordP3uiv,
+    GLMultiTexCoordP4ui,
+    GLMultiTexCoordP4uiv,
+    GLNamedBufferData,
+    GLNamedBufferStorage,
+    GLNamedBufferStorageExternalEXT,
+    GLNamedBufferSubData,
+    GLNamedFramebufferDrawBuffer,
+    GLNamedFramebufferDrawBuffers,
+    GLNamedFramebufferParameteri,
+    GLNamedFramebufferReadBuffer,
+    GLNamedFramebufferRenderbuffer,
+    GLNamedFramebufferTexture,
+    GLNamedFramebufferTextureLayer,
+    GLNamedRenderbufferStorage,
+    GLNamedRenderbufferStorageMultisample,
+    GLNewList,
+    GLNormal3b,
+    GLNormal3bv,
+    GLNormal3d,
+    GLNormal3dv,
+    GLNormal3f,
+    GLNormal3fv,
+    GLNormal3i,
+    GLNormal3iv,
+    GLNormal3s,
+    GLNormal3sv,
+    GLNormal3x,
+    GLNormalP3ui,
+    GLNormalP3uiv,
+    GLNormalPointer,
+    GLObjectLabel,
+    GLObjectLabelKHR,
+    GLObjectPtrLabel,
+    GLObjectPtrLabelKHR,
+    GLOrtho,
+    GLOrthof,
+    GLOrthox,
+    GLPassThrough,
+    GLPatchParameterfv,
+    GLPatchParameteri,
+    GLPatchParameteriEXT,
+    GLPauseTransformFeedback,
+    GLPixelLocalStorageBarrierANGLE,
+    GLPixelMapfv,
+    GLPixelMapuiv,
+    GLPixelMapusv,
+    GLPixelStoref,
+    GLPixelStorei,
+    GLPixelTransferf,
+    GLPixelTransferi,
+    GLPixelZoom,
+    GLPointParameterf,
+    GLPointParameterfv,
+    GLPointParameteri,
+    GLPointParameteriv,
+    GLPointParameterx,
+    GLPointParameterxv,
+    GLPointSize,
+    GLPointSizePointerOES,
+    GLPointSizex,
+    GLPolygonMode,
+    GLPolygonOffset,
+    GLPolygonOffsetClamp,
+    GLPolygonOffsetx,
+    GLPolygonStipple,
+    GLPopAttrib,
+    GLPopClientAttrib,
+    GLPopDebugGroup,
+    GLPopDebugGroupKHR,
+    GLPopGroupMarkerEXT,
+    GLPopMatrix,
+    GLPopName,
+    GLPrimitiveBoundingBox,
+    GLPrimitiveBoundingBoxEXT,
+    GLPrimitiveBoundingBoxOES,
+    GLPrimitiveRestartIndex,
+    GLPrioritizeTextures,
+    GLProgramBinary,
+    GLProgramBinaryOES,
+    GLProgramParameteri,
+    GLProgramParameteriEXT,
+    GLProgramUniform1d,
+    GLProgramUniform1dv,
+    GLProgramUniform1f,
+    GLProgramUniform1fEXT,
+    GLProgramUniform1fv,
+    GLProgramUniform1fvEXT,
+    GLProgramUniform1i,
+    GLProgramUniform1iEXT,
+    GLProgramUniform1iv,
+    GLProgramUniform1ivEXT,
+    GLProgramUniform1ui,
+    GLProgramUniform1uiEXT,
+    GLProgramUniform1uiv,
+    GLProgramUniform1uivEXT,
+    GLProgramUniform2d,
+    GLProgramUniform2dv,
+    GLProgramUniform2f,
+    GLProgramUniform2fEXT,
+    GLProgramUniform2fv,
+    GLProgramUniform2fvEXT,
+    GLProgramUniform2i,
+    GLProgramUniform2iEXT,
+    GLProgramUniform2iv,
+    GLProgramUniform2ivEXT,
+    GLProgramUniform2ui,
+    GLProgramUniform2uiEXT,
+    GLProgramUniform2uiv,
+    GLProgramUniform2uivEXT,
+    GLProgramUniform3d,
+    GLProgramUniform3dv,
+    GLProgramUniform3f,
+    GLProgramUniform3fEXT,
+    GLProgramUniform3fv,
+    GLProgramUniform3fvEXT,
+    GLProgramUniform3i,
+    GLProgramUniform3iEXT,
+    GLProgramUniform3iv,
+    GLProgramUniform3ivEXT,
+    GLProgramUniform3ui,
+    GLProgramUniform3uiEXT,
+    GLProgramUniform3uiv,
+    GLProgramUniform3uivEXT,
+    GLProgramUniform4d,
+    GLProgramUniform4dv,
+    GLProgramUniform4f,
+    GLProgramUniform4fEXT,
+    GLProgramUniform4fv,
+    GLProgramUniform4fvEXT,
+    GLProgramUniform4i,
+    GLProgramUniform4iEXT,
+    GLProgramUniform4iv,
+    GLProgramUniform4ivEXT,
+    GLProgramUniform4ui,
+    GLProgramUniform4uiEXT,
+    GLProgramUniform4uiv,
+    GLProgramUniform4uivEXT,
+    GLProgramUniformMatrix2dv,
+    GLProgramUniformMatrix2fv,
+    GLProgramUniformMatrix2fvEXT,
+    GLProgramUniformMatrix2x3dv,
+    GLProgramUniformMatrix2x3fv,
+    GLProgramUniformMatrix2x3fvEXT,
+    GLProgramUniformMatrix2x4dv,
+    GLProgramUniformMatrix2x4fv,
+    GLProgramUniformMatrix2x4fvEXT,
+    GLProgramUniformMatrix3dv,
+    GLProgramUniformMatrix3fv,
+    GLProgramUniformMatrix3fvEXT,
+    GLProgramUniformMatrix3x2dv,
+    GLProgramUniformMatrix3x2fv,
+    GLProgramUniformMatrix3x2fvEXT,
+    GLProgramUniformMatrix3x4dv,
+    GLProgramUniformMatrix3x4fv,
+    GLProgramUniformMatrix3x4fvEXT,
+    GLProgramUniformMatrix4dv,
+    GLProgramUniformMatrix4fv,
+    GLProgramUniformMatrix4fvEXT,
+    GLProgramUniformMatrix4x2dv,
+    GLProgramUniformMatrix4x2fv,
+    GLProgramUniformMatrix4x2fvEXT,
+    GLProgramUniformMatrix4x3dv,
+    GLProgramUniformMatrix4x3fv,
+    GLProgramUniformMatrix4x3fvEXT,
+    GLProvokingVertex,
+    GLProvokingVertexANGLE,
+    GLPushAttrib,
+    GLPushClientAttrib,
+    GLPushDebugGroup,
+    GLPushDebugGroupKHR,
+    GLPushGroupMarkerEXT,
+    GLPushMatrix,
+    GLPushName,
+    GLQueryCounter,
+    GLQueryCounterEXT,
+    GLQueryMatrixxOES,
+    GLRasterPos2d,
+    GLRasterPos2dv,
+    GLRasterPos2f,
+    GLRasterPos2fv,
+    GLRasterPos2i,
+    GLRasterPos2iv,
+    GLRasterPos2s,
+    GLRasterPos2sv,
+    GLRasterPos3d,
+    GLRasterPos3dv,
+    GLRasterPos3f,
+    GLRasterPos3fv,
+    GLRasterPos3i,
+    GLRasterPos3iv,
+    GLRasterPos3s,
+    GLRasterPos3sv,
+    GLRasterPos4d,
+    GLRasterPos4dv,
+    GLRasterPos4f,
+    GLRasterPos4fv,
+    GLRasterPos4i,
+    GLRasterPos4iv,
+    GLRasterPos4s,
+    GLRasterPos4sv,
+    GLReadBuffer,
+    GLReadPixels,
+    GLReadPixelsRobustANGLE,
+    GLReadnPixels,
+    GLReadnPixelsEXT,
+    GLReadnPixelsRobustANGLE,
+    GLRectd,
+    GLRectdv,
+    GLRectf,
+    GLRectfv,
+    GLRecti,
+    GLRectiv,
+    GLRects,
+    GLRectsv,
+    GLReleaseShaderCompiler,
+    GLReleaseTexturesANGLE,
+    GLRenderMode,
+    GLRenderbufferStorage,
+    GLRenderbufferStorageMultisample,
+    GLRenderbufferStorageMultisampleANGLE,
+    GLRenderbufferStorageMultisampleEXT,
+    GLRenderbufferStorageOES,
+    GLRequestExtensionANGLE,
+    GLResumeTransformFeedback,
+    GLRotated,
+    GLRotatef,
+    GLRotatex,
+    GLSampleCoverage,
+    GLSampleCoveragex,
+    GLSampleMaski,
+    GLSampleMaskiANGLE,
+    GLSamplerParameterIiv,
+    GLSamplerParameterIivEXT,
+    GLSamplerParameterIivOES,
+    GLSamplerParameterIivRobustANGLE,
+    GLSamplerParameterIuiv,
+    GLSamplerParameterIuivEXT,
+    GLSamplerParameterIuivOES,
+    GLSamplerParameterIuivRobustANGLE,
+    GLSamplerParameterf,
+    GLSamplerParameterfv,
+    GLSamplerParameterfvRobustANGLE,
+    GLSamplerParameteri,
+    GLSamplerParameteriv,
+    GLSamplerParameterivRobustANGLE,
+    GLScaled,
+    GLScalef,
+    GLScalex,
+    GLScissor,
+    GLScissorArrayv,
+    GLScissorIndexed,
+    GLScissorIndexedv,
+    GLSecondaryColor3b,
+    GLSecondaryColor3bv,
+    GLSecondaryColor3d,
+    GLSecondaryColor3dv,
+    GLSecondaryColor3f,
+    GLSecondaryColor3fv,
+    GLSecondaryColor3i,
+    GLSecondaryColor3iv,
+    GLSecondaryColor3s,
+    GLSecondaryColor3sv,
+    GLSecondaryColor3ub,
+    GLSecondaryColor3ubv,
+    GLSecondaryColor3ui,
+    GLSecondaryColor3uiv,
+    GLSecondaryColor3us,
+    GLSecondaryColor3usv,
+    GLSecondaryColorP3ui,
+    GLSecondaryColorP3uiv,
+    GLSecondaryColorPointer,
+    GLSelectBuffer,
+    GLSelectPerfMonitorCountersAMD,
+    GLSemaphoreParameterui64vEXT,
+    GLSetFenceNV,
+    GLShadeModel,
+    GLShaderBinary,
+    GLShaderSource,
+    GLShaderStorageBlockBinding,
+    GLShadingRateQCOM,
+    GLSignalSemaphoreEXT,
+    GLSpecializeShader,
+    GLStencilFunc,
+    GLStencilFuncSeparate,
+    GLStencilMask,
+    GLStencilMaskSeparate,
+    GLStencilOp,
+    GLStencilOpSeparate,
+    GLTestFenceNV,
+    GLTexBuffer,
+    GLTexBufferEXT,
+    GLTexBufferOES,
+    GLTexBufferRange,
+    GLTexBufferRangeEXT,
+    GLTexBufferRangeOES,
+    GLTexCoord1d,
+    GLTexCoord1dv,
+    GLTexCoord1f,
+    GLTexCoord1fv,
+    GLTexCoord1i,
+    GLTexCoord1iv,
+    GLTexCoord1s,
+    GLTexCoord1sv,
+    GLTexCoord2d,
+    GLTexCoord2dv,
+    GLTexCoord2f,
+    GLTexCoord2fv,
+    GLTexCoord2i,
+    GLTexCoord2iv,
+    GLTexCoord2s,
+    GLTexCoord2sv,
+    GLTexCoord3d,
+    GLTexCoord3dv,
+    GLTexCoord3f,
+    GLTexCoord3fv,
+    GLTexCoord3i,
+    GLTexCoord3iv,
+    GLTexCoord3s,
+    GLTexCoord3sv,
+    GLTexCoord4d,
+    GLTexCoord4dv,
+    GLTexCoord4f,
+    GLTexCoord4fv,
+    GLTexCoord4i,
+    GLTexCoord4iv,
+    GLTexCoord4s,
+    GLTexCoord4sv,
+    GLTexCoordP1ui,
+    GLTexCoordP1uiv,
+    GLTexCoordP2ui,
+    GLTexCoordP2uiv,
+    GLTexCoordP3ui,
+    GLTexCoordP3uiv,
+    GLTexCoordP4ui,
+    GLTexCoordP4uiv,
+    GLTexCoordPointer,
+    GLTexEnvf,
+    GLTexEnvfv,
+    GLTexEnvi,
+    GLTexEnviv,
+    GLTexEnvx,
+    GLTexEnvxv,
+    GLTexGend,
+    GLTexGendv,
+    GLTexGenf,
+    GLTexGenfOES,
+    GLTexGenfv,
+    GLTexGenfvOES,
+    GLTexGeni,
+    GLTexGeniOES,
+    GLTexGeniv,
+    GLTexGenivOES,
+    GLTexGenxOES,
+    GLTexGenxvOES,
+    GLTexImage1D,
+    GLTexImage2D,
+    GLTexImage2DExternalANGLE,
+    GLTexImage2DMultisample,
+    GLTexImage2DRobustANGLE,
+    GLTexImage3D,
+    GLTexImage3DMultisample,
+    GLTexImage3DOES,
+    GLTexImage3DRobustANGLE,
+    GLTexParameterIiv,
+    GLTexParameterIivEXT,
+    GLTexParameterIivOES,
+    GLTexParameterIivRobustANGLE,
+    GLTexParameterIuiv,
+    GLTexParameterIuivEXT,
+    GLTexParameterIuivOES,
+    GLTexParameterIuivRobustANGLE,
+    GLTexParameterf,
+    GLTexParameterfv,
+    GLTexParameterfvRobustANGLE,
+    GLTexParameteri,
+    GLTexParameteriv,
+    GLTexParameterivRobustANGLE,
+    GLTexParameterx,
+    GLTexParameterxv,
+    GLTexStorage1D,
+    GLTexStorage1DEXT,
+    GLTexStorage2D,
+    GLTexStorage2DEXT,
+    GLTexStorage2DMultisample,
+    GLTexStorage2DMultisampleANGLE,
+    GLTexStorage3D,
+    GLTexStorage3DEXT,
+    GLTexStorage3DMultisample,
+    GLTexStorage3DMultisampleOES,
+    GLTexStorageMem2DEXT,
+    GLTexStorageMem2DMultisampleEXT,
+    GLTexStorageMem3DEXT,
+    GLTexStorageMem3DMultisampleEXT,
+    GLTexStorageMemFlags2DANGLE,
+    GLTexStorageMemFlags2DMultisampleANGLE,
+    GLTexStorageMemFlags3DANGLE,
+    GLTexStorageMemFlags3DMultisampleANGLE,
+    GLTexSubImage1D,
+    GLTexSubImage2D,
+    GLTexSubImage2DRobustANGLE,
+    GLTexSubImage3D,
+    GLTexSubImage3DOES,
+    GLTexSubImage3DRobustANGLE,
+    GLTextureBarrier,
+    GLTextureBuffer,
+    GLTextureBufferRange,
+    GLTextureParameterIiv,
+    GLTextureParameterIuiv,
+    GLTextureParameterf,
+    GLTextureParameterfv,
+    GLTextureParameteri,
+    GLTextureParameteriv,
+    GLTextureStorage1D,
+    GLTextureStorage2D,
+    GLTextureStorage2DMultisample,
+    GLTextureStorage3D,
+    GLTextureStorage3DMultisample,
+    GLTextureSubImage1D,
+    GLTextureSubImage2D,
+    GLTextureSubImage3D,
+    GLTextureView,
+    GLTransformFeedbackBufferBase,
+    GLTransformFeedbackBufferRange,
+    GLTransformFeedbackVaryings,
+    GLTranslated,
+    GLTranslatef,
+    GLTranslatex,
+    GLUniform1d,
+    GLUniform1dv,
+    GLUniform1f,
+    GLUniform1fv,
+    GLUniform1i,
+    GLUniform1iv,
+    GLUniform1ui,
+    GLUniform1uiv,
+    GLUniform2d,
+    GLUniform2dv,
+    GLUniform2f,
+    GLUniform2fv,
+    GLUniform2i,
+    GLUniform2iv,
+    GLUniform2ui,
+    GLUniform2uiv,
+    GLUniform3d,
+    GLUniform3dv,
+    GLUniform3f,
+    GLUniform3fv,
+    GLUniform3i,
+    GLUniform3iv,
+    GLUniform3ui,
+    GLUniform3uiv,
+    GLUniform4d,
+    GLUniform4dv,
+    GLUniform4f,
+    GLUniform4fv,
+    GLUniform4i,
+    GLUniform4iv,
+    GLUniform4ui,
+    GLUniform4uiv,
+    GLUniformBlockBinding,
+    GLUniformMatrix2dv,
+    GLUniformMatrix2fv,
+    GLUniformMatrix2x3dv,
+    GLUniformMatrix2x3fv,
+    GLUniformMatrix2x4dv,
+    GLUniformMatrix2x4fv,
+    GLUniformMatrix3dv,
+    GLUniformMatrix3fv,
+    GLUniformMatrix3x2dv,
+    GLUniformMatrix3x2fv,
+    GLUniformMatrix3x4dv,
+    GLUniformMatrix3x4fv,
+    GLUniformMatrix4dv,
+    GLUniformMatrix4fv,
+    GLUniformMatrix4x2dv,
+    GLUniformMatrix4x2fv,
+    GLUniformMatrix4x3dv,
+    GLUniformMatrix4x3fv,
+    GLUniformSubroutinesuiv,
+    GLUnmapBuffer,
+    GLUnmapBufferOES,
+    GLUnmapNamedBuffer,
+    GLUseProgram,
+    GLUseProgramStages,
+    GLUseProgramStagesEXT,
+    GLValidateProgram,
+    GLValidateProgramPipeline,
+    GLValidateProgramPipelineEXT,
+    GLVertex2d,
+    GLVertex2dv,
+    GLVertex2f,
+    GLVertex2fv,
+    GLVertex2i,
+    GLVertex2iv,
+    GLVertex2s,
+    GLVertex2sv,
+    GLVertex3d,
+    GLVertex3dv,
+    GLVertex3f,
+    GLVertex3fv,
+    GLVertex3i,
+    GLVertex3iv,
+    GLVertex3s,
+    GLVertex3sv,
+    GLVertex4d,
+    GLVertex4dv,
+    GLVertex4f,
+    GLVertex4fv,
+    GLVertex4i,
+    GLVertex4iv,
+    GLVertex4s,
+    GLVertex4sv,
+    GLVertexArrayAttribBinding,
+    GLVertexArrayAttribFormat,
+    GLVertexArrayAttribIFormat,
+    GLVertexArrayAttribLFormat,
+    GLVertexArrayBindingDivisor,
+    GLVertexArrayElementBuffer,
+    GLVertexArrayVertexBuffer,
+    GLVertexArrayVertexBuffers,
+    GLVertexAttrib1d,
+    GLVertexAttrib1dv,
+    GLVertexAttrib1f,
+    GLVertexAttrib1fv,
+    GLVertexAttrib1s,
+    GLVertexAttrib1sv,
+    GLVertexAttrib2d,
+    GLVertexAttrib2dv,
+    GLVertexAttrib2f,
+    GLVertexAttrib2fv,
+    GLVertexAttrib2s,
+    GLVertexAttrib2sv,
+    GLVertexAttrib3d,
+    GLVertexAttrib3dv,
+    GLVertexAttrib3f,
+    GLVertexAttrib3fv,
+    GLVertexAttrib3s,
+    GLVertexAttrib3sv,
+    GLVertexAttrib4Nbv,
+    GLVertexAttrib4Niv,
+    GLVertexAttrib4Nsv,
+    GLVertexAttrib4Nub,
+    GLVertexAttrib4Nubv,
+    GLVertexAttrib4Nuiv,
+    GLVertexAttrib4Nusv,
+    GLVertexAttrib4bv,
+    GLVertexAttrib4d,
+    GLVertexAttrib4dv,
+    GLVertexAttrib4f,
+    GLVertexAttrib4fv,
+    GLVertexAttrib4iv,
+    GLVertexAttrib4s,
+    GLVertexAttrib4sv,
+    GLVertexAttrib4ubv,
+    GLVertexAttrib4uiv,
+    GLVertexAttrib4usv,
+    GLVertexAttribBinding,
+    GLVertexAttribDivisor,
+    GLVertexAttribDivisorANGLE,
+    GLVertexAttribDivisorEXT,
+    GLVertexAttribFormat,
+    GLVertexAttribI1i,
+    GLVertexAttribI1iv,
+    GLVertexAttribI1ui,
+    GLVertexAttribI1uiv,
+    GLVertexAttribI2i,
+    GLVertexAttribI2iv,
+    GLVertexAttribI2ui,
+    GLVertexAttribI2uiv,
+    GLVertexAttribI3i,
+    GLVertexAttribI3iv,
+    GLVertexAttribI3ui,
+    GLVertexAttribI3uiv,
+    GLVertexAttribI4bv,
+    GLVertexAttribI4i,
+    GLVertexAttribI4iv,
+    GLVertexAttribI4sv,
+    GLVertexAttribI4ubv,
+    GLVertexAttribI4ui,
+    GLVertexAttribI4uiv,
+    GLVertexAttribI4usv,
+    GLVertexAttribIFormat,
+    GLVertexAttribIPointer,
+    GLVertexAttribL1d,
+    GLVertexAttribL1dv,
+    GLVertexAttribL2d,
+    GLVertexAttribL2dv,
+    GLVertexAttribL3d,
+    GLVertexAttribL3dv,
+    GLVertexAttribL4d,
+    GLVertexAttribL4dv,
+    GLVertexAttribLFormat,
+    GLVertexAttribLPointer,
+    GLVertexAttribP1ui,
+    GLVertexAttribP1uiv,
+    GLVertexAttribP2ui,
+    GLVertexAttribP2uiv,
+    GLVertexAttribP3ui,
+    GLVertexAttribP3uiv,
+    GLVertexAttribP4ui,
+    GLVertexAttribP4uiv,
+    GLVertexAttribPointer,
+    GLVertexBindingDivisor,
+    GLVertexP2ui,
+    GLVertexP2uiv,
+    GLVertexP3ui,
+    GLVertexP3uiv,
+    GLVertexP4ui,
+    GLVertexP4uiv,
+    GLVertexPointer,
+    GLViewport,
+    GLViewportArrayv,
+    GLViewportIndexedf,
+    GLViewportIndexedfv,
+    GLWaitSemaphoreEXT,
+    GLWaitSync,
+    GLWeightPointerOES,
+    GLWindowPos2d,
+    GLWindowPos2dv,
+    GLWindowPos2f,
+    GLWindowPos2fv,
+    GLWindowPos2i,
+    GLWindowPos2iv,
+    GLWindowPos2s,
+    GLWindowPos2sv,
+    GLWindowPos3d,
+    GLWindowPos3dv,
+    GLWindowPos3f,
+    GLWindowPos3fv,
+    GLWindowPos3i,
+    GLWindowPos3iv,
+    GLWindowPos3s,
+    GLWindowPos3sv,
+    WGLChoosePixelFormat,
+    WGLCopyContext,
+    WGLCreateContext,
+    WGLCreateLayerContext,
+    WGLDeleteContext,
+    WGLDescribeLayerPlane,
+    WGLDescribePixelFormat,
+    WGLGetCurrentContext,
+    WGLGetCurrentDC,
+    WGLGetEnhMetaFilePixelFormat,
+    WGLGetLayerPaletteEntries,
+    WGLGetPixelFormat,
+    WGLGetProcAddress,
+    WGLMakeCurrent,
+    WGLRealizeLayerPalette,
+    WGLSetLayerPaletteEntries,
+    WGLSetPixelFormat,
+    WGLShareLists,
+    WGLSwapBuffers,
+    WGLSwapLayerBuffers,
+    WGLUseFontBitmaps,
+    WGLUseFontBitmapsA,
+    WGLUseFontBitmapsW,
+    WGLUseFontOutlines,
+    WGLUseFontOutlinesA,
+    WGLUseFontOutlinesW
+};
+
+const char *GetEntryPointName(EntryPoint ep);
+}  // namespace angle
+#endif  // COMMON_ENTRY_POINTS_ENUM_AUTOGEN_H_
diff --git a/gfx/angle/checkout/src/common/event_tracer.cpp b/gfx/angle/checkout/src/common/event_tracer.cpp
new file mode 100644
index 0000000000..151cb2cd70
--- /dev/null
+++ b/gfx/angle/checkout/src/common/event_tracer.cpp
@@ -0,0 +1,53 @@
+// Copyright 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "common/event_tracer.h"
+
+#include "common/debug.h"
+
+namespace angle
+{
+
+const unsigned char *GetTraceCategoryEnabledFlag(PlatformMethods *platform, const char *name)
+{
+    ASSERT(platform);
+
+    const unsigned char *categoryEnabledFlag =
+        platform->getTraceCategoryEnabledFlag(platform, name);
+    if (categoryEnabledFlag != nullptr)
+    {
+        return categoryEnabledFlag;
+    }
+
+    static unsigned char disabled = 0;
+    return &disabled;
+}
+
+angle::TraceEventHandle AddTraceEvent(PlatformMethods *platform,
+                                      char phase,
+                                      const unsigned char *categoryGroupEnabled,
+                                      const char *name,
+                                      unsigned long long id,
+                                      int numArgs,
+                                      const char **argNames,
+                                      const unsigned char *argTypes,
+                                      const unsigned long long *argValues,
+                                      unsigned char flags)
+{
+    ASSERT(platform);
+
+    double timestamp = platform->monotonicallyIncreasingTime(platform);
+
+    if (timestamp != 0)
+    {
+        angle::TraceEventHandle handle =
+            platform->addTraceEvent(platform, phase, categoryGroupEnabled, name, id, timestamp,
+                                    numArgs, argNames, argTypes, argValues, flags);
+        return handle;
+    }
+
+    return static_cast<angle::TraceEventHandle>(0);
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/event_tracer.h b/gfx/angle/checkout/src/common/event_tracer.h
new file mode 100644
index 0000000000..128d88b9e0
--- /dev/null
+++ b/gfx/angle/checkout/src/common/event_tracer.h
@@ -0,0 +1,26 @@
+// Copyright 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMMON_EVENT_TRACER_H_
+#define COMMON_EVENT_TRACER_H_
+
+#include "common/platform.h"
+#include "platform/PlatformMethods.h"
+
+namespace angle
+{
+const unsigned char *GetTraceCategoryEnabledFlag(PlatformMethods *platform, const char *name);
+angle::TraceEventHandle AddTraceEvent(PlatformMethods *platform,
+                                      char phase,
+                                      const unsigned char *categoryGroupEnabled,
+                                      const char *name,
+                                      unsigned long long id,
+                                      int numArgs,
+                                      const char **argNames,
+                                      const unsigned char *argTypes,
+                                      const unsigned long long *argValues,
+                                      unsigned char flags);
+}  // namespace angle
+
+#endif  // COMMON_EVENT_TRACER_H_
diff --git a/gfx/angle/checkout/src/common/hash_utils.h b/gfx/angle/checkout/src/common/hash_utils.h
new file mode 100644
index 0000000000..aec4e7f77c
--- /dev/null
+++ b/gfx/angle/checkout/src/common/hash_utils.h
@@ -0,0 +1,39 @@
+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// hash_utils.h: Hashing based helper functions.
+
+#ifndef COMMON_HASHUTILS_H_
+#define COMMON_HASHUTILS_H_
+
+#include "common/debug.h"
+#include "common/third_party/xxhash/xxhash.h"
+
+namespace angle
+{
+// Computes a hash of "key". Any data passed to this function must be multiples of
+// 4 bytes, since the PMurHash32 method can only operate increments of 4-byte words.
+inline std::size_t ComputeGenericHash(const void *key, size_t keySize)
+{
+    static constexpr unsigned int kSeed = 0xABCDEF98;
+
+    // We can't support "odd" alignments.  ComputeGenericHash requires aligned types
+    ASSERT(keySize % 4 == 0);
+#if defined(ANGLE_IS_64_BIT_CPU)
+    return XXH64(key, keySize, kSeed);
+#else
+    return XXH32(key, keySize, kSeed);
+#endif  // defined(ANGLE_IS_64_BIT_CPU)
+}
+
+template <typename T>
+std::size_t ComputeGenericHash(const T &key)
+{
+    static_assert(sizeof(key) % 4 == 0, "ComputeGenericHash requires aligned types");
+    return ComputeGenericHash(&key, sizeof(key));
+}
+}  // namespace angle
+
+#endif  // COMMON_HASHUTILS_H_
diff --git a/gfx/angle/checkout/src/common/mathutil.cpp b/gfx/angle/checkout/src/common/mathutil.cpp
new file mode 100644
index 0000000000..5cbc6a920a
--- /dev/null
+++ b/gfx/angle/checkout/src/common/mathutil.cpp
@@ -0,0 +1,83 @@
+//
+// Copyright 2013 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// mathutil.cpp: Math and bit manipulation functions.
+
+#include "common/mathutil.h"
+
+#include <math.h>
+#include <algorithm>
+
+namespace gl
+{
+
+namespace
+{
+
+struct RGB9E5Data
+{
+    unsigned int R : 9;
+    unsigned int G : 9;
+    unsigned int B : 9;
+    unsigned int E : 5;
+};
+
+// B is the exponent bias (15)
+constexpr int g_sharedexp_bias = 15;
+
+// N is the number of mantissa bits per component (9)
+constexpr int g_sharedexp_mantissabits = 9;
+
+// number of mantissa bits per component pre-biased
+constexpr int g_sharedexp_biased_mantissabits = g_sharedexp_bias + g_sharedexp_mantissabits;
+
+// Emax is the maximum allowed biased exponent value (31)
+constexpr int g_sharedexp_maxexponent = 31;
+
+constexpr float g_sharedexp_max =
+    ((static_cast<float>(1 << g_sharedexp_mantissabits) - 1) /
+     static_cast<float>(1 << g_sharedexp_mantissabits)) *
+    static_cast<float>(1 << (g_sharedexp_maxexponent - g_sharedexp_bias));
+
+}  // anonymous namespace
+
+unsigned int convertRGBFloatsTo999E5(float red, float green, float blue)
+{
+    const float red_c   = std::max<float>(0, std::min(g_sharedexp_max, red));
+    const float green_c = std::max<float>(0, std::min(g_sharedexp_max, green));
+    const float blue_c  = std::max<float>(0, std::min(g_sharedexp_max, blue));
+
+    const float max_c = std::max<float>(std::max<float>(red_c, green_c), blue_c);
+    const float exp_p =
+        std::max<float>(-g_sharedexp_bias - 1, floor(log(max_c))) + 1 + g_sharedexp_bias;
+    const int max_s = static_cast<int>(
+        floor((max_c / (pow(2.0f, exp_p - g_sharedexp_biased_mantissabits))) + 0.5f));
+    const int exp_s =
+        static_cast<int>((max_s < pow(2.0f, g_sharedexp_mantissabits)) ? exp_p : exp_p + 1);
+    const float pow2_exp = pow(2.0f, static_cast<float>(exp_s) - g_sharedexp_biased_mantissabits);
+
+    RGB9E5Data output;
+    output.R = static_cast<unsigned int>(floor((red_c / pow2_exp) + 0.5f));
+    output.G = static_cast<unsigned int>(floor((green_c / pow2_exp) + 0.5f));
+    output.B = static_cast<unsigned int>(floor((blue_c / pow2_exp) + 0.5f));
+    output.E = exp_s;
+
+    return bitCast<unsigned int>(output);
+}
+
+void convert999E5toRGBFloats(unsigned int input, float *red, float *green, float *blue)
+{
+    const RGB9E5Data *inputData = reinterpret_cast<const RGB9E5Data *>(&input);
+
+    const float pow2_exp =
+        pow(2.0f, static_cast<float>(inputData->E) - g_sharedexp_biased_mantissabits);
+
+    *red   = inputData->R * pow2_exp;
+    *green = inputData->G * pow2_exp;
+    *blue  = inputData->B * pow2_exp;
+}
+
+}  // namespace gl
diff --git a/gfx/angle/checkout/src/common/mathutil.h b/gfx/angle/checkout/src/common/mathutil.h
new file mode 100644
index 0000000000..560929239f
--- /dev/null
+++ b/gfx/angle/checkout/src/common/mathutil.h
@@ -0,0 +1,1482 @@
+//
+// Copyright 2002 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// mathutil.h: Math and bit manipulation functions.
+
+#ifndef COMMON_MATHUTIL_H_
+#define COMMON_MATHUTIL_H_
+
+#include <math.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <algorithm>
+#include <limits>
+
+#include <anglebase/numerics/safe_math.h>
+
+#include "common/debug.h"
+#include "common/platform.h"
+
+namespace angle
+{
+using base::CheckedNumeric;
+using base::IsValueInRangeForNumericType;
+}  // namespace angle
+
+namespace gl
+{
+
+const unsigned int Float32One   = 0x3F800000;
+const unsigned short Float16One = 0x3C00;
+
+template <typename T>
+inline constexpr bool isPow2(T x)
+{
+    static_assert(std::is_integral<T>::value, "isPow2 must be called on an integer type.");
+    return (x & (x - 1)) == 0 && (x != 0);
+}
+
+template <typename T>
+inline int log2(T x)
+{
+    static_assert(std::is_integral<T>::value, "log2 must be called on an integer type.");
+    int r = 0;
+    while ((x >> r) > 1)
+        r++;
+    return r;
+}
+
+inline unsigned int ceilPow2(unsigned int x)
+{
+    if (x != 0)
+        x--;
+    x |= x >> 1;
+    x |= x >> 2;
+    x |= x >> 4;
+    x |= x >> 8;
+    x |= x >> 16;
+    x++;
+
+    return x;
+}
+
+template <typename DestT, typename SrcT>
+inline DestT clampCast(SrcT value)
+{
+    // For floating-point types with denormalization, min returns the minimum positive normalized
+    // value. To find the value that has no values less than it, use numeric_limits::lowest.
+    constexpr const long double destLo =
+        static_cast<long double>(std::numeric_limits<DestT>::lowest());
+    constexpr const long double destHi =
+        static_cast<long double>(std::numeric_limits<DestT>::max());
+    constexpr const long double srcLo =
+        static_cast<long double>(std::numeric_limits<SrcT>::lowest());
+    constexpr long double srcHi = static_cast<long double>(std::numeric_limits<SrcT>::max());
+
+    if (destHi < srcHi)
+    {
+        DestT destMax = std::numeric_limits<DestT>::max();
+        if (value >= static_cast<SrcT>(destMax))
+        {
+            return destMax;
+        }
+    }
+
+    if (destLo > srcLo)
+    {
+        DestT destLow = std::numeric_limits<DestT>::lowest();
+        if (value <= static_cast<SrcT>(destLow))
+        {
+            return destLow;
+        }
+    }
+
+    return static_cast<DestT>(value);
+}
+
+// Specialize clampCast for bool->int conversion to avoid MSVS 2015 performance warning when the max
+// value is casted to the source type.
+template <>
+inline unsigned int clampCast(bool value)
+{
+    return static_cast<unsigned int>(value);
+}
+
+template <>
+inline int clampCast(bool value)
+{
+    return static_cast<int>(value);
+}
+
+template <typename T, typename MIN, typename MAX>
+inline T clamp(T x, MIN min, MAX max)
+{
+    // Since NaNs fail all comparison tests, a NaN value will default to min
+    return x > min ? (x > max ? max : x) : min;
+}
+
+template <typename T>
+T clampForBitCount(T value, size_t bitCount)
+{
+    static_assert(std::numeric_limits<T>::is_integer, "T must be an integer.");
+
+    if (bitCount == 0)
+    {
+        constexpr T kZero = 0;
+        return kZero;
+    }
+    ASSERT(bitCount <= sizeof(T) * 8);
+
+    constexpr bool kIsSigned = std::numeric_limits<T>::is_signed;
+    ASSERT((bitCount > 1) || !kIsSigned);
+
+    T min = 0;
+    T max = 0;
+    if (bitCount == sizeof(T) * 8)
+    {
+        min = std::numeric_limits<T>::min();
+        max = std::numeric_limits<T>::max();
+    }
+    else
+    {
+        constexpr T kOne = 1;
+        min              = (kIsSigned) ? -1 * (kOne << (bitCount - 1)) : 0;
+        max              = (kIsSigned) ? (kOne << (bitCount - 1)) - 1 : (kOne << bitCount) - 1;
+    }
+
+    return gl::clamp(value, min, max);
+}
+
+inline float clamp01(float x)
+{
+    return clamp(x, 0.0f, 1.0f);
+}
+
+template <const int n>
+inline unsigned int unorm(float x)
+{
+    const unsigned int max = 0xFFFFFFFF >> (32 - n);
+
+    if (x > 1)
+    {
+        return max;
+    }
+    else if (x < 0)
+    {
+        return 0;
+    }
+    else
+    {
+        return (unsigned int)(max * x + 0.5f);
+    }
+}
+
+inline bool supportsSSE2()
+{
+#if defined(ANGLE_USE_SSE)
+    static bool checked  = false;
+    static bool supports = false;
+
+    if (checked)
+    {
+        return supports;
+    }
+
+#    if defined(ANGLE_PLATFORM_WINDOWS) && !defined(_M_ARM) && !defined(_M_ARM64)
+    {
+        int info[4];
+        __cpuid(info, 0);
+
+        if (info[0] >= 1)
+        {
+            __cpuid(info, 1);
+
+            supports = (info[3] >> 26) & 1;
+        }
+    }
+#    endif  // defined(ANGLE_PLATFORM_WINDOWS) && !defined(_M_ARM) && !defined(_M_ARM64)
+    checked = true;
+    return supports;
+#else  // defined(ANGLE_USE_SSE)
+    return false;
+#endif
+}
+
+template <typename destType, typename sourceType>
+destType bitCast(const sourceType &source)
+{
+    size_t copySize = std::min(sizeof(destType), sizeof(sourceType));
+    destType output;
+    memcpy(&output, &source, copySize);
+    return output;
+}
+
+// https://stackoverflow.com/a/37581284
+template <typename T>
+static constexpr double normalize(T value)
+{
+    return value < 0 ? -static_cast<double>(value) / std::numeric_limits<T>::min()
+                     : static_cast<double>(value) / std::numeric_limits<T>::max();
+}
+
+inline unsigned short float32ToFloat16(float fp32)
+{
+    unsigned int fp32i = bitCast<unsigned int>(fp32);
+    unsigned int sign  = (fp32i & 0x80000000) >> 16;
+    unsigned int abs   = fp32i & 0x7FFFFFFF;
+
+    if (abs > 0x7F800000)
+    {  // NaN
+        return 0x7FFF;
+    }
+    else if (abs > 0x47FFEFFF)
+    {  // Infinity
+        return static_cast<uint16_t>(sign | 0x7C00);
+    }
+    else if (abs < 0x38800000)  // Denormal
+    {
+        unsigned int mantissa = (abs & 0x007FFFFF) | 0x00800000;
+        int e                 = 113 - (abs >> 23);
+
+        if (e < 24)
+        {
+            abs = mantissa >> e;
+        }
+        else
+        {
+            abs = 0;
+        }
+
+        return static_cast<unsigned short>(sign | (abs + 0x00000FFF + ((abs >> 13) & 1)) >> 13);
+    }
+    else
+    {
+        return static_cast<unsigned short>(
+            sign | (abs + 0xC8000000 + 0x00000FFF + ((abs >> 13) & 1)) >> 13);
+    }
+}
+
+float float16ToFloat32(unsigned short h);
+
+unsigned int convertRGBFloatsTo999E5(float red, float green, float blue);
+void convert999E5toRGBFloats(unsigned int input, float *red, float *green, float *blue);
+
+inline unsigned short float32ToFloat11(float fp32)
+{
+    const unsigned int float32MantissaMask     = 0x7FFFFF;
+    const unsigned int float32ExponentMask     = 0x7F800000;
+    const unsigned int float32SignMask         = 0x80000000;
+    const unsigned int float32ValueMask        = ~float32SignMask;
+    const unsigned int float32ExponentFirstBit = 23;
+    const unsigned int float32ExponentBias     = 127;
+
+    const unsigned short float11Max          = 0x7BF;
+    const unsigned short float11MantissaMask = 0x3F;
+    const unsigned short float11ExponentMask = 0x7C0;
+    const unsigned short float11BitMask      = 0x7FF;
+    const unsigned int float11ExponentBias   = 14;
+
+    const unsigned int float32Maxfloat11       = 0x477E0000;
+    const unsigned int float32MinNormfloat11   = 0x38800000;
+    const unsigned int float32MinDenormfloat11 = 0x35000080;
+
+    const unsigned int float32Bits = bitCast<unsigned int>(fp32);
+    const bool float32Sign         = (float32Bits & float32SignMask) == float32SignMask;
+
+    unsigned int float32Val = float32Bits & float32ValueMask;
+
+    if ((float32Val & float32ExponentMask) == float32ExponentMask)
+    {
+        // INF or NAN
+        if ((float32Val & float32MantissaMask) != 0)
+        {
+            return float11ExponentMask |
+                   (((float32Val >> 17) | (float32Val >> 11) | (float32Val >> 6) | (float32Val)) &
+                    float11MantissaMask);
+        }
+        else if (float32Sign)
+        {
+            // -INF is clamped to 0 since float11 is positive only
+            return 0;
+        }
+        else
+        {
+            return float11ExponentMask;
+        }
+    }
+    else if (float32Sign)
+    {
+        // float11 is positive only, so clamp to zero
+        return 0;
+    }
+    else if (float32Val > float32Maxfloat11)
+    {
+        // The number is too large to be represented as a float11, set to max
+        return float11Max;
+    }
+    else if (float32Val < float32MinDenormfloat11)
+    {
+        // The number is too small to be represented as a denormalized float11, set to 0
+        return 0;
+    }
+    else
+    {
+        if (float32Val < float32MinNormfloat11)
+        {
+            // The number is too small to be represented as a normalized float11
+            // Convert it to a denormalized value.
+            const unsigned int shift = (float32ExponentBias - float11ExponentBias) -
+                                       (float32Val >> float32ExponentFirstBit);
+            ASSERT(shift < 32);
+            float32Val =
+                ((1 << float32ExponentFirstBit) | (float32Val & float32MantissaMask)) >> shift;
+        }
+        else
+        {
+            // Rebias the exponent to represent the value as a normalized float11
+            float32Val += 0xC8000000;
+        }
+
+        return ((float32Val + 0xFFFF + ((float32Val >> 17) & 1)) >> 17) & float11BitMask;
+    }
+}
+
+inline unsigned short float32ToFloat10(float fp32)
+{
+    const unsigned int float32MantissaMask     = 0x7FFFFF;
+    const unsigned int float32ExponentMask     = 0x7F800000;
+    const unsigned int float32SignMask         = 0x80000000;
+    const unsigned int float32ValueMask        = ~float32SignMask;
+    const unsigned int float32ExponentFirstBit = 23;
+    const unsigned int float32ExponentBias     = 127;
+
+    const unsigned short float10Max          = 0x3DF;
+    const unsigned short float10MantissaMask = 0x1F;
+    const unsigned short float10ExponentMask = 0x3E0;
+    const unsigned short float10BitMask      = 0x3FF;
+    const unsigned int float10ExponentBias   = 14;
+
+    const unsigned int float32Maxfloat10       = 0x477C0000;
+    const unsigned int float32MinNormfloat10   = 0x38800000;
+    const unsigned int float32MinDenormfloat10 = 0x35800040;
+
+    const unsigned int float32Bits = bitCast<unsigned int>(fp32);
+    const bool float32Sign         = (float32Bits & float32SignMask) == float32SignMask;
+
+    unsigned int float32Val = float32Bits & float32ValueMask;
+
+    if ((float32Val & float32ExponentMask) == float32ExponentMask)
+    {
+        // INF or NAN
+        if ((float32Val & float32MantissaMask) != 0)
+        {
+            return float10ExponentMask |
+                   (((float32Val >> 18) | (float32Val >> 13) | (float32Val >> 3) | (float32Val)) &
+                    float10MantissaMask);
+        }
+        else if (float32Sign)
+        {
+            // -INF is clamped to 0 since float10 is positive only
+            return 0;
+        }
+        else
+        {
+            return float10ExponentMask;
+        }
+    }
+    else if (float32Sign)
+    {
+        // float10 is positive only, so clamp to zero
+        return 0;
+    }
+    else if (float32Val > float32Maxfloat10)
+    {
+        // The number is too large to be represented as a float10, set to max
+        return float10Max;
+    }
+    else if (float32Val < float32MinDenormfloat10)
+    {
+        // The number is too small to be represented as a denormalized float10, set to 0
+        return 0;
+    }
+    else
+    {
+        if (float32Val < float32MinNormfloat10)
+        {
+            // The number is too small to be represented as a normalized float10
+            // Convert it to a denormalized value.
+            const unsigned int shift = (float32ExponentBias - float10ExponentBias) -
+                                       (float32Val >> float32ExponentFirstBit);
+            ASSERT(shift < 32);
+            float32Val =
+                ((1 << float32ExponentFirstBit) | (float32Val & float32MantissaMask)) >> shift;
+        }
+        else
+        {
+            // Rebias the exponent to represent the value as a normalized float10
+            float32Val += 0xC8000000;
+        }
+
+        return ((float32Val + 0x1FFFF + ((float32Val >> 18) & 1)) >> 18) & float10BitMask;
+    }
+}
+
+inline float float11ToFloat32(unsigned short fp11)
+{
+    unsigned short exponent = (fp11 >> 6) & 0x1F;
+    unsigned short mantissa = fp11 & 0x3F;
+
+    if (exponent == 0x1F)
+    {
+        // INF or NAN
+        return bitCast<float>(0x7f800000 | (mantissa << 17));
+    }
+    else
+    {
+        if (exponent != 0)
+        {
+            // normalized
+        }
+        else if (mantissa != 0)
+        {
+            // The value is denormalized
+            exponent = 1;
+
+            do
+            {
+                exponent--;
+                mantissa <<= 1;
+            } while ((mantissa & 0x40) == 0);
+
+            mantissa = mantissa & 0x3F;
+        }
+        else  // The value is zero
+        {
+            exponent = static_cast<unsigned short>(-112);
+        }
+
+        return bitCast<float>(((exponent + 112) << 23) | (mantissa << 17));
+    }
+}
+
+inline float float10ToFloat32(unsigned short fp10)
+{
+    unsigned short exponent = (fp10 >> 5) & 0x1F;
+    unsigned short mantissa = fp10 & 0x1F;
+
+    if (exponent == 0x1F)
+    {
+        // INF or NAN
+        return bitCast<float>(0x7f800000 | (mantissa << 17));
+    }
+    else
+    {
+        if (exponent != 0)
+        {
+            // normalized
+        }
+        else if (mantissa != 0)
+        {
+            // The value is denormalized
+            exponent = 1;
+
+            do
+            {
+                exponent--;
+                mantissa <<= 1;
+            } while ((mantissa & 0x20) == 0);
+
+            mantissa = mantissa & 0x1F;
+        }
+        else  // The value is zero
+        {
+            exponent = static_cast<unsigned short>(-112);
+        }
+
+        return bitCast<float>(((exponent + 112) << 23) | (mantissa << 18));
+    }
+}
+
+// Converts to and from float and 16.16 fixed point format.
+inline float ConvertFixedToFloat(int32_t fixedInput)
+{
+    return static_cast<float>(fixedInput) / 65536.0f;
+}
+
+inline uint32_t ConvertFloatToFixed(float floatInput)
+{
+    static constexpr uint32_t kHighest = 32767 * 65536 + 65535;
+    static constexpr uint32_t kLowest  = static_cast<uint32_t>(-32768 * 65536 + 65535);
+
+    if (floatInput > 32767.65535)
+    {
+        return kHighest;
+    }
+    else if (floatInput < -32768.65535)
+    {
+        return kLowest;
+    }
+    else
+    {
+        return static_cast<uint32_t>(floatInput * 65536);
+    }
+}
+
+template <typename T>
+inline float normalizedToFloat(T input)
+{
+    static_assert(std::numeric_limits<T>::is_integer, "T must be an integer.");
+
+    if (sizeof(T) > 2)
+    {
+        // float has only a 23 bit mantissa, so we need to do the calculation in double precision
+        constexpr double inverseMax = 1.0 / std::numeric_limits<T>::max();
+        return static_cast<float>(input * inverseMax);
+    }
+    else
+    {
+        constexpr float inverseMax = 1.0f / std::numeric_limits<T>::max();
+        return input * inverseMax;
+    }
+}
+
+template <unsigned int inputBitCount, typename T>
+inline float normalizedToFloat(T input)
+{
+    static_assert(std::numeric_limits<T>::is_integer, "T must be an integer.");
+    static_assert(inputBitCount < (sizeof(T) * 8), "T must have more bits than inputBitCount.");
+    ASSERT((input & ~((1 << inputBitCount) - 1)) == 0);
+
+    if (inputBitCount > 23)
+    {
+        // float has only a 23 bit mantissa, so we need to do the calculation in double precision
+        constexpr double inverseMax = 1.0 / ((1 << inputBitCount) - 1);
+        return static_cast<float>(input * inverseMax);
+    }
+    else
+    {
+        constexpr float inverseMax = 1.0f / ((1 << inputBitCount) - 1);
+        return input * inverseMax;
+    }
+}
+
+template <typename T>
+inline T floatToNormalized(float input)
+{
+    if constexpr (sizeof(T) > 2)
+    {
+        // float has only a 23 bit mantissa, so we need to do the calculation in double precision
+        return static_cast<T>(std::numeric_limits<T>::max() * static_cast<double>(input) + 0.5);
+    }
+    else
+    {
+        return static_cast<T>(std::numeric_limits<T>::max() * input + 0.5f);
+    }
+}
+
+template <unsigned int outputBitCount, typename T>
+inline T floatToNormalized(float input)
+{
+    static_assert(outputBitCount < (sizeof(T) * 8), "T must have more bits than outputBitCount.");
+
+    if (outputBitCount > 23)
+    {
+        // float has only a 23 bit mantissa, so we need to do the calculation in double precision
+        return static_cast<T>(((1 << outputBitCount) - 1) * static_cast<double>(input) + 0.5);
+    }
+    else
+    {
+        return static_cast<T>(((1 << outputBitCount) - 1) * input + 0.5f);
+    }
+}
+
+template <unsigned int inputBitCount, unsigned int inputBitStart, typename T>
+inline T getShiftedData(T input)
+{
+    static_assert(inputBitCount + inputBitStart <= (sizeof(T) * 8),
+                  "T must have at least as many bits as inputBitCount + inputBitStart.");
+    const T mask = (1 << inputBitCount) - 1;
+    return (input >> inputBitStart) & mask;
+}
+
+template <unsigned int inputBitCount, unsigned int inputBitStart, typename T>
+inline T shiftData(T input)
+{
+    static_assert(inputBitCount + inputBitStart <= (sizeof(T) * 8),
+                  "T must have at least as many bits as inputBitCount + inputBitStart.");
+    const T mask = (1 << inputBitCount) - 1;
+    return (input & mask) << inputBitStart;
+}
+
+inline unsigned int CountLeadingZeros(uint32_t x)
+{
+    // Use binary search to find the amount of leading zeros.
+    unsigned int zeros = 32u;
+    uint32_t y;
+
+    y = x >> 16u;
+    if (y != 0)
+    {
+        zeros = zeros - 16u;
+        x     = y;
+    }
+    y = x >> 8u;
+    if (y != 0)
+    {
+        zeros = zeros - 8u;
+        x     = y;
+    }
+    y = x >> 4u;
+    if (y != 0)
+    {
+        zeros = zeros - 4u;
+        x     = y;
+    }
+    y = x >> 2u;
+    if (y != 0)
+    {
+        zeros = zeros - 2u;
+        x     = y;
+    }
+    y = x >> 1u;
+    if (y != 0)
+    {
+        return zeros - 2u;
+    }
+    return zeros - x;
+}
+
+inline unsigned char average(unsigned char a, unsigned char b)
+{
+    return ((a ^ b) >> 1) + (a & b);
+}
+
+inline signed char average(signed char a, signed char b)
+{
+    return ((short)a + (short)b) / 2;
+}
+
+inline unsigned short average(unsigned short a, unsigned short b)
+{
+    return ((a ^ b) >> 1) + (a & b);
+}
+
+inline signed short average(signed short a, signed short b)
+{
+    return ((int)a + (int)b) / 2;
+}
+
+inline unsigned int average(unsigned int a, unsigned int b)
+{
+    return ((a ^ b) >> 1) + (a & b);
+}
+
+inline int average(int a, int b)
+{
+    long long average = (static_cast<long long>(a) + static_cast<long long>(b)) / 2LL;
+    return static_cast<int>(average);
+}
+
+inline float average(float a, float b)
+{
+    return (a + b) * 0.5f;
+}
+
+inline unsigned short averageHalfFloat(unsigned short a, unsigned short b)
+{
+    return float32ToFloat16((float16ToFloat32(a) + float16ToFloat32(b)) * 0.5f);
+}
+
+inline unsigned int averageFloat11(unsigned int a, unsigned int b)
+{
+    return float32ToFloat11((float11ToFloat32(static_cast<unsigned short>(a)) +
+                             float11ToFloat32(static_cast<unsigned short>(b))) *
+                            0.5f);
+}
+
+inline unsigned int averageFloat10(unsigned int a, unsigned int b)
+{
+    return float32ToFloat10((float10ToFloat32(static_cast<unsigned short>(a)) +
+                             float10ToFloat32(static_cast<unsigned short>(b))) *
+                            0.5f);
+}
+
+template <typename T>
+class Range
+{
+  public:
+    Range() {}
+    Range(T lo, T hi) : mLow(lo), mHigh(hi) {}
+
+    T length() const { return (empty() ? 0 : (mHigh - mLow)); }
+
+    bool intersects(Range<T> other)
+    {
+        if (mLow <= other.mLow)
+        {
+            return other.mLow < mHigh;
+        }
+        else
+        {
+            return mLow < other.mHigh;
+        }
+    }
+
+    // Assumes that end is non-inclusive.. for example, extending to 5 will make "end" 6.
+    void extend(T value)
+    {
+        mLow  = value < mLow ? value : mLow;
+        mHigh = value >= mHigh ? (value + 1) : mHigh;
+    }
+
+    bool empty() const { return mHigh <= mLow; }
+
+    bool contains(T value) const { return value >= mLow && value < mHigh; }
+
+    class Iterator final
+    {
+      public:
+        Iterator(T value) : mCurrent(value) {}
+
+        Iterator &operator++()
+        {
+            mCurrent++;
+            return *this;
+        }
+        bool operator==(const Iterator &other) const { return mCurrent == other.mCurrent; }
+        bool operator!=(const Iterator &other) const { return mCurrent != other.mCurrent; }
+        T operator*() const { return mCurrent; }
+
+      private:
+        T mCurrent;
+    };
+
+    Iterator begin() const { return Iterator(mLow); }
+
+    Iterator end() const { return Iterator(mHigh); }
+
+    T low() const { return mLow; }
+    T high() const { return mHigh; }
+
+    void invalidate()
+    {
+        mLow  = std::numeric_limits<T>::max();
+        mHigh = std::numeric_limits<T>::min();
+    }
+
+  private:
+    T mLow;
+    T mHigh;
+};
+
+typedef Range<int> RangeI;
+typedef Range<unsigned int> RangeUI;
+
+struct IndexRange
+{
+    struct Undefined
+    {};
+    IndexRange(Undefined) {}
+    IndexRange() : IndexRange(0, 0, 0) {}
+    IndexRange(size_t start_, size_t end_, size_t vertexIndexCount_)
+        : start(start_), end(end_), vertexIndexCount(vertexIndexCount_)
+    {
+        ASSERT(start <= end);
+    }
+
+    // Number of vertices in the range.
+    size_t vertexCount() const { return (end - start) + 1; }
+
+    // Inclusive range of indices that are not primitive restart
+    size_t start;
+    size_t end;
+
+    // Number of non-primitive restart indices
+    size_t vertexIndexCount;
+};
+
+// Combine a floating-point value representing a mantissa (x) and an integer exponent (exp) into a
+// floating-point value. As in GLSL ldexp() built-in.
+inline float Ldexp(float x, int exp)
+{
+    if (exp > 128)
+    {
+        return std::numeric_limits<float>::infinity();
+    }
+    if (exp < -126)
+    {
+        return 0.0f;
+    }
+    double result = static_cast<double>(x) * std::pow(2.0, static_cast<double>(exp));
+    return static_cast<float>(result);
+}
+
+// First, both normalized floating-point values are converted into 16-bit integer values.
+// Then, the results are packed into the returned 32-bit unsigned integer.
+// The first float value will be written to the least significant bits of the output;
+// the last float value will be written to the most significant bits.
+// The conversion of each value to fixed point is done as follows :
+// packSnorm2x16 : round(clamp(c, -1, +1) * 32767.0)
+inline uint32_t packSnorm2x16(float f1, float f2)
+{
+    int16_t leastSignificantBits = static_cast<int16_t>(roundf(clamp(f1, -1.0f, 1.0f) * 32767.0f));
+    int16_t mostSignificantBits  = static_cast<int16_t>(roundf(clamp(f2, -1.0f, 1.0f) * 32767.0f));
+    return static_cast<uint32_t>(mostSignificantBits) << 16 |
+           (static_cast<uint32_t>(leastSignificantBits) & 0xFFFF);
+}
+
+// First, unpacks a single 32-bit unsigned integer u into a pair of 16-bit unsigned integers. Then,
+// each component is converted to a normalized floating-point value to generate the returned two
+// float values. The first float value will be extracted from the least significant bits of the
+// input; the last float value will be extracted from the most-significant bits. The conversion for
+// unpacked fixed-point value to floating point is done as follows: unpackSnorm2x16 : clamp(f /
+// 32767.0, -1, +1)
+inline void unpackSnorm2x16(uint32_t u, float *f1, float *f2)
+{
+    int16_t leastSignificantBits = static_cast<int16_t>(u & 0xFFFF);
+    int16_t mostSignificantBits  = static_cast<int16_t>(u >> 16);
+    *f1 = clamp(static_cast<float>(leastSignificantBits) / 32767.0f, -1.0f, 1.0f);
+    *f2 = clamp(static_cast<float>(mostSignificantBits) / 32767.0f, -1.0f, 1.0f);
+}
+
+// First, both normalized floating-point values are converted into 16-bit integer values.
+// Then, the results are packed into the returned 32-bit unsigned integer.
+// The first float value will be written to the least significant bits of the output;
+// the last float value will be written to the most significant bits.
+// The conversion of each value to fixed point is done as follows:
+// packUnorm2x16 : round(clamp(c, 0, +1) * 65535.0)
+inline uint32_t packUnorm2x16(float f1, float f2)
+{
+    uint16_t leastSignificantBits = static_cast<uint16_t>(roundf(clamp(f1, 0.0f, 1.0f) * 65535.0f));
+    uint16_t mostSignificantBits  = static_cast<uint16_t>(roundf(clamp(f2, 0.0f, 1.0f) * 65535.0f));
+    return static_cast<uint32_t>(mostSignificantBits) << 16 |
+           static_cast<uint32_t>(leastSignificantBits);
+}
+
+// First, unpacks a single 32-bit unsigned integer u into a pair of 16-bit unsigned integers. Then,
+// each component is converted to a normalized floating-point value to generate the returned two
+// float values. The first float value will be extracted from the least significant bits of the
+// input; the last float value will be extracted from the most-significant bits. The conversion for
+// unpacked fixed-point value to floating point is done as follows: unpackUnorm2x16 : f / 65535.0
+inline void unpackUnorm2x16(uint32_t u, float *f1, float *f2)
+{
+    uint16_t leastSignificantBits = static_cast<uint16_t>(u & 0xFFFF);
+    uint16_t mostSignificantBits  = static_cast<uint16_t>(u >> 16);
+    *f1                           = static_cast<float>(leastSignificantBits) / 65535.0f;
+    *f2                           = static_cast<float>(mostSignificantBits) / 65535.0f;
+}
+
+// Helper functions intended to be used only here.
+namespace priv
+{
+
+inline uint8_t ToPackedUnorm8(float f)
+{
+    return static_cast<uint8_t>(roundf(clamp(f, 0.0f, 1.0f) * 255.0f));
+}
+
+inline int8_t ToPackedSnorm8(float f)
+{
+    return static_cast<int8_t>(roundf(clamp(f, -1.0f, 1.0f) * 127.0f));
+}
+
+}  // namespace priv
+
+// Packs 4 normalized unsigned floating-point values to a single 32-bit unsigned integer. Works
+// similarly to packUnorm2x16. The floats are clamped to the range 0.0 to 1.0, and written to the
+// unsigned integer starting from the least significant bits.
+inline uint32_t PackUnorm4x8(float f1, float f2, float f3, float f4)
+{
+    uint8_t bits[4];
+    bits[0]         = priv::ToPackedUnorm8(f1);
+    bits[1]         = priv::ToPackedUnorm8(f2);
+    bits[2]         = priv::ToPackedUnorm8(f3);
+    bits[3]         = priv::ToPackedUnorm8(f4);
+    uint32_t result = 0u;
+    for (int i = 0; i < 4; ++i)
+    {
+        int shift = i * 8;
+        result |= (static_cast<uint32_t>(bits[i]) << shift);
+    }
+    return result;
+}
+
+// Unpacks 4 normalized unsigned floating-point values from a single 32-bit unsigned integer into f.
+// Works similarly to unpackUnorm2x16. The floats are unpacked starting from the least significant
+// bits.
+inline void UnpackUnorm4x8(uint32_t u, float *f)
+{
+    for (int i = 0; i < 4; ++i)
+    {
+        int shift    = i * 8;
+        uint8_t bits = static_cast<uint8_t>((u >> shift) & 0xFF);
+        f[i]         = static_cast<float>(bits) / 255.0f;
+    }
+}
+
+// Packs 4 normalized signed floating-point values to a single 32-bit unsigned integer. The floats
+// are clamped to the range -1.0 to 1.0, and written to the unsigned integer starting from the least
+// significant bits.
+inline uint32_t PackSnorm4x8(float f1, float f2, float f3, float f4)
+{
+    int8_t bits[4];
+    bits[0]         = priv::ToPackedSnorm8(f1);
+    bits[1]         = priv::ToPackedSnorm8(f2);
+    bits[2]         = priv::ToPackedSnorm8(f3);
+    bits[3]         = priv::ToPackedSnorm8(f4);
+    uint32_t result = 0u;
+    for (int i = 0; i < 4; ++i)
+    {
+        int shift = i * 8;
+        result |= ((static_cast<uint32_t>(bits[i]) & 0xFF) << shift);
+    }
+    return result;
+}
+
+// Unpacks 4 normalized signed floating-point values from a single 32-bit unsigned integer into f.
+// Works similarly to unpackSnorm2x16. The floats are unpacked starting from the least significant
+// bits, and clamped to the range -1.0 to 1.0.
+inline void UnpackSnorm4x8(uint32_t u, float *f)
+{
+    for (int i = 0; i < 4; ++i)
+    {
+        int shift   = i * 8;
+        int8_t bits = static_cast<int8_t>((u >> shift) & 0xFF);
+        f[i]        = clamp(static_cast<float>(bits) / 127.0f, -1.0f, 1.0f);
+    }
+}
+
+// Returns an unsigned integer obtained by converting the two floating-point values to the 16-bit
+// floating-point representation found in the OpenGL ES Specification, and then packing these
+// two 16-bit integers into a 32-bit unsigned integer.
+// f1: The 16 least-significant bits of the result;
+// f2: The 16 most-significant bits.
+inline uint32_t packHalf2x16(float f1, float f2)
+{
+    uint16_t leastSignificantBits = static_cast<uint16_t>(float32ToFloat16(f1));
+    uint16_t mostSignificantBits  = static_cast<uint16_t>(float32ToFloat16(f2));
+    return static_cast<uint32_t>(mostSignificantBits) << 16 |
+           static_cast<uint32_t>(leastSignificantBits);
+}
+
+// Returns two floating-point values obtained by unpacking a 32-bit unsigned integer into a pair of
+// 16-bit values, interpreting those values as 16-bit floating-point numbers according to the OpenGL
+// ES Specification, and converting them to 32-bit floating-point values. The first float value is
+// obtained from the 16 least-significant bits of u; the second component is obtained from the 16
+// most-significant bits of u.
+inline void unpackHalf2x16(uint32_t u, float *f1, float *f2)
+{
+    uint16_t leastSignificantBits = static_cast<uint16_t>(u & 0xFFFF);
+    uint16_t mostSignificantBits  = static_cast<uint16_t>(u >> 16);
+
+    *f1 = float16ToFloat32(leastSignificantBits);
+    *f2 = float16ToFloat32(mostSignificantBits);
+}
+
+inline uint8_t sRGBToLinear(uint8_t srgbValue)
+{
+    float value = srgbValue / 255.0f;
+    if (value <= 0.04045f)
+    {
+        value = value / 12.92f;
+    }
+    else
+    {
+        value = std::pow((value + 0.055f) / 1.055f, 2.4f);
+    }
+    return static_cast<uint8_t>(clamp(value * 255.0f + 0.5f, 0.0f, 255.0f));
+}
+
+inline uint8_t linearToSRGB(uint8_t linearValue)
+{
+    float value = linearValue / 255.0f;
+    if (value <= 0.0f)
+    {
+        value = 0.0f;
+    }
+    else if (value < 0.0031308f)
+    {
+        value = value * 12.92f;
+    }
+    else if (value < 1.0f)
+    {
+        value = std::pow(value, 0.41666f) * 1.055f - 0.055f;
+    }
+    else
+    {
+        value = 1.0f;
+    }
+    return static_cast<uint8_t>(clamp(value * 255.0f + 0.5f, 0.0f, 255.0f));
+}
+
+// Reverse the order of the bits.
+inline uint32_t BitfieldReverse(uint32_t value)
+{
+    // TODO(oetuaho@nvidia.com): Optimize this if needed. There don't seem to be compiler intrinsics
+    // for this, and right now it's not used in performance-critical paths.
+    uint32_t result = 0u;
+    for (size_t j = 0u; j < 32u; ++j)
+    {
+        result |= (((value >> j) & 1u) << (31u - j));
+    }
+    return result;
+}
+
+// Count the 1 bits.
+#if defined(_MSC_VER) && !defined(__clang__)
+#    if defined(_M_IX86) || defined(_M_X64)
+namespace priv
+{
+// Check POPCNT instruction support and cache the result.
+// https://docs.microsoft.com/en-us/cpp/intrinsics/popcnt16-popcnt-popcnt64#remarks
+static const bool kHasPopcnt = [] {
+    int info[4];
+    __cpuid(&info[0], 1);
+    return static_cast<bool>(info[2] & 0x800000);
+}();
+}  // namespace priv
+
+// Polyfills for x86/x64 CPUs without POPCNT.
+// https://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetParallel
+inline int BitCountPolyfill(uint32_t bits)
+{
+    bits = bits - ((bits >> 1) & 0x55555555);
+    bits = (bits & 0x33333333) + ((bits >> 2) & 0x33333333);
+    bits = ((bits + (bits >> 4) & 0x0F0F0F0F) * 0x01010101) >> 24;
+    return static_cast<int>(bits);
+}
+
+inline int BitCountPolyfill(uint64_t bits)
+{
+    bits = bits - ((bits >> 1) & 0x5555555555555555ull);
+    bits = (bits & 0x3333333333333333ull) + ((bits >> 2) & 0x3333333333333333ull);
+    bits = ((bits + (bits >> 4) & 0x0F0F0F0F0F0F0F0Full) * 0x0101010101010101ull) >> 56;
+    return static_cast<int>(bits);
+}
+
+inline int BitCount(uint32_t bits)
+{
+    if (priv::kHasPopcnt)
+    {
+        return static_cast<int>(__popcnt(bits));
+    }
+    return BitCountPolyfill(bits);
+}
+
+inline int BitCount(uint64_t bits)
+{
+    if (priv::kHasPopcnt)
+    {
+#        if defined(_M_X64)
+        return static_cast<int>(__popcnt64(bits));
+#        else   // x86
+        return static_cast<int>(__popcnt(static_cast<uint32_t>(bits >> 32)) +
+                                __popcnt(static_cast<uint32_t>(bits)));
+#        endif  // defined(_M_X64)
+    }
+    return BitCountPolyfill(bits);
+}
+
+#    elif defined(_M_ARM) || defined(_M_ARM64)
+
+// MSVC's _CountOneBits* intrinsics are not defined for ARM64, moreover they do not use dedicated
+// NEON instructions.
+
+inline int BitCount(uint32_t bits)
+{
+    // cast bits to 8x8 datatype and use VCNT on it
+    const uint8x8_t vsum = vcnt_u8(vcreate_u8(static_cast<uint64_t>(bits)));
+
+    // pairwise sums: 8x8 -> 16x4 -> 32x2
+    return static_cast<int>(vget_lane_u32(vpaddl_u16(vpaddl_u8(vsum)), 0));
+}
+
+inline int BitCount(uint64_t bits)
+{
+    // cast bits to 8x8 datatype and use VCNT on it
+    const uint8x8_t vsum = vcnt_u8(vcreate_u8(bits));
+
+    // pairwise sums: 8x8 -> 16x4 -> 32x2 -> 64x1
+    return static_cast<int>(vget_lane_u64(vpaddl_u32(vpaddl_u16(vpaddl_u8(vsum))), 0));
+}
+#    endif  // defined(_M_IX86) || defined(_M_X64)
+#endif      // defined(_MSC_VER) && !defined(__clang__)
+
+#if defined(ANGLE_PLATFORM_POSIX) || defined(__clang__)
+inline int BitCount(uint32_t bits)
+{
+    return __builtin_popcount(bits);
+}
+
+inline int BitCount(uint64_t bits)
+{
+    return __builtin_popcountll(bits);
+}
+#endif  // defined(ANGLE_PLATFORM_POSIX) || defined(__clang__)
+
+inline int BitCount(uint8_t bits)
+{
+    return BitCount(static_cast<uint32_t>(bits));
+}
+
+inline int BitCount(uint16_t bits)
+{
+    return BitCount(static_cast<uint32_t>(bits));
+}
+
+#if defined(ANGLE_PLATFORM_WINDOWS)
+// Return the index of the least significant bit set. Indexing is such that bit 0 is the least
+// significant bit. Implemented for different bit widths on different platforms.
+inline unsigned long ScanForward(uint32_t bits)
+{
+    ASSERT(bits != 0u);
+    unsigned long firstBitIndex = 0ul;
+    unsigned char ret           = _BitScanForward(&firstBitIndex, bits);
+    ASSERT(ret != 0u);
+    return firstBitIndex;
+}
+
+inline unsigned long ScanForward(uint64_t bits)
+{
+    ASSERT(bits != 0u);
+    unsigned long firstBitIndex = 0ul;
+#    if defined(ANGLE_IS_64_BIT_CPU)
+    unsigned char ret = _BitScanForward64(&firstBitIndex, bits);
+#    else
+    unsigned char ret;
+    if (static_cast<uint32_t>(bits) == 0)
+    {
+        ret = _BitScanForward(&firstBitIndex, static_cast<uint32_t>(bits >> 32));
+        firstBitIndex += 32ul;
+    }
+    else
+    {
+        ret = _BitScanForward(&firstBitIndex, static_cast<uint32_t>(bits));
+    }
+#    endif  // defined(ANGLE_IS_64_BIT_CPU)
+    ASSERT(ret != 0u);
+    return firstBitIndex;
+}
+
+// Return the index of the most significant bit set. Indexing is such that bit 0 is the least
+// significant bit.
+inline unsigned long ScanReverse(uint32_t bits)
+{
+    ASSERT(bits != 0u);
+    unsigned long lastBitIndex = 0ul;
+    unsigned char ret          = _BitScanReverse(&lastBitIndex, bits);
+    ASSERT(ret != 0u);
+    return lastBitIndex;
+}
+
+inline unsigned long ScanReverse(uint64_t bits)
+{
+    ASSERT(bits != 0u);
+    unsigned long lastBitIndex = 0ul;
+#    if defined(ANGLE_IS_64_BIT_CPU)
+    unsigned char ret = _BitScanReverse64(&lastBitIndex, bits);
+#    else
+    unsigned char ret;
+    if (static_cast<uint32_t>(bits >> 32) == 0)
+    {
+        ret = _BitScanReverse(&lastBitIndex, static_cast<uint32_t>(bits));
+    }
+    else
+    {
+        ret = _BitScanReverse(&lastBitIndex, static_cast<uint32_t>(bits >> 32));
+        lastBitIndex += 32ul;
+    }
+#    endif  // defined(ANGLE_IS_64_BIT_CPU)
+    ASSERT(ret != 0u);
+    return lastBitIndex;
+}
+#endif  // defined(ANGLE_PLATFORM_WINDOWS)
+
+#if defined(ANGLE_PLATFORM_POSIX)
+inline unsigned long ScanForward(uint32_t bits)
+{
+    ASSERT(bits != 0u);
+    return static_cast<unsigned long>(__builtin_ctz(bits));
+}
+
+inline unsigned long ScanForward(uint64_t bits)
+{
+    ASSERT(bits != 0u);
+#    if defined(ANGLE_IS_64_BIT_CPU)
+    return static_cast<unsigned long>(__builtin_ctzll(bits));
+#    else
+    return static_cast<unsigned long>(static_cast<uint32_t>(bits) == 0
+                                          ? __builtin_ctz(static_cast<uint32_t>(bits >> 32)) + 32
+                                          : __builtin_ctz(static_cast<uint32_t>(bits)));
+#    endif  // defined(ANGLE_IS_64_BIT_CPU)
+}
+
+inline unsigned long ScanReverse(uint32_t bits)
+{
+    ASSERT(bits != 0u);
+    return static_cast<unsigned long>(sizeof(uint32_t) * CHAR_BIT - 1 - __builtin_clz(bits));
+}
+
+inline unsigned long ScanReverse(uint64_t bits)
+{
+    ASSERT(bits != 0u);
+#    if defined(ANGLE_IS_64_BIT_CPU)
+    return static_cast<unsigned long>(sizeof(uint64_t) * CHAR_BIT - 1 - __builtin_clzll(bits));
+#    else
+    if (static_cast<uint32_t>(bits >> 32) == 0)
+    {
+        return sizeof(uint32_t) * CHAR_BIT - 1 - __builtin_clz(static_cast<uint32_t>(bits));
+    }
+    else
+    {
+        return sizeof(uint32_t) * CHAR_BIT - 1 - __builtin_clz(static_cast<uint32_t>(bits >> 32)) +
+               32;
+    }
+#    endif  // defined(ANGLE_IS_64_BIT_CPU)
+}
+#endif  // defined(ANGLE_PLATFORM_POSIX)
+
+inline unsigned long ScanForward(uint8_t bits)
+{
+    return ScanForward(static_cast<uint32_t>(bits));
+}
+
+inline unsigned long ScanForward(uint16_t bits)
+{
+    return ScanForward(static_cast<uint32_t>(bits));
+}
+
+inline unsigned long ScanReverse(uint8_t bits)
+{
+    return ScanReverse(static_cast<uint32_t>(bits));
+}
+
+inline unsigned long ScanReverse(uint16_t bits)
+{
+    return ScanReverse(static_cast<uint32_t>(bits));
+}
+
+// Returns -1 on 0, otherwise the index of the least significant 1 bit as in GLSL.
+template <typename T>
+int FindLSB(T bits)
+{
+    static_assert(std::is_integral<T>::value, "must be integral type.");
+    if (bits == 0u)
+    {
+        return -1;
+    }
+    else
+    {
+        return static_cast<int>(ScanForward(bits));
+    }
+}
+
+// Returns -1 on 0, otherwise the index of the most significant 1 bit as in GLSL.
+template <typename T>
+int FindMSB(T bits)
+{
+    static_assert(std::is_integral<T>::value, "must be integral type.");
+    if (bits == 0u)
+    {
+        return -1;
+    }
+    else
+    {
+        return static_cast<int>(ScanReverse(bits));
+    }
+}
+
+// Returns whether the argument is Not a Number.
+// IEEE 754 single precision NaN representation: Exponent(8 bits) - 255, Mantissa(23 bits) -
+// non-zero.
+inline bool isNaN(float f)
+{
+    // Exponent mask: ((1u << 8) - 1u) << 23 = 0x7f800000u
+    // Mantissa mask: ((1u << 23) - 1u) = 0x7fffffu
+    return ((bitCast<uint32_t>(f) & 0x7f800000u) == 0x7f800000u) &&
+           (bitCast<uint32_t>(f) & 0x7fffffu);
+}
+
+// Returns whether the argument is infinity.
+// IEEE 754 single precision infinity representation: Exponent(8 bits) - 255, Mantissa(23 bits) -
+// zero.
+inline bool isInf(float f)
+{
+    // Exponent mask: ((1u << 8) - 1u) << 23 = 0x7f800000u
+    // Mantissa mask: ((1u << 23) - 1u) = 0x7fffffu
+    return ((bitCast<uint32_t>(f) & 0x7f800000u) == 0x7f800000u) &&
+           !(bitCast<uint32_t>(f) & 0x7fffffu);
+}
+
+namespace priv
+{
+template <unsigned int N, unsigned int R>
+struct iSquareRoot
+{
+    static constexpr unsigned int solve()
+    {
+        return (R * R > N)
+                   ? 0
+                   : ((R * R == N) ? R : static_cast<unsigned int>(iSquareRoot<N, R + 1>::value));
+    }
+    enum Result
+    {
+        value = iSquareRoot::solve()
+    };
+};
+
+template <unsigned int N>
+struct iSquareRoot<N, N>
+{
+    enum result
+    {
+        value = N
+    };
+};
+
+}  // namespace priv
+
+template <unsigned int N>
+constexpr unsigned int iSquareRoot()
+{
+    return priv::iSquareRoot<N, 1>::value;
+}
+
+// Sum, difference and multiplication operations for signed ints that wrap on 32-bit overflow.
+//
+// Unsigned types are defined to do arithmetic modulo 2^n in C++. For signed types, overflow
+// behavior is undefined.
+
+template <typename T>
+inline T WrappingSum(T lhs, T rhs)
+{
+    uint32_t lhsUnsigned = static_cast<uint32_t>(lhs);
+    uint32_t rhsUnsigned = static_cast<uint32_t>(rhs);
+    return static_cast<T>(lhsUnsigned + rhsUnsigned);
+}
+
+template <typename T>
+inline T WrappingDiff(T lhs, T rhs)
+{
+    uint32_t lhsUnsigned = static_cast<uint32_t>(lhs);
+    uint32_t rhsUnsigned = static_cast<uint32_t>(rhs);
+    return static_cast<T>(lhsUnsigned - rhsUnsigned);
+}
+
+inline int32_t WrappingMul(int32_t lhs, int32_t rhs)
+{
+    int64_t lhsWide = static_cast<int64_t>(lhs);
+    int64_t rhsWide = static_cast<int64_t>(rhs);
+    // The multiplication is guaranteed not to overflow.
+    int64_t resultWide = lhsWide * rhsWide;
+    // Implement the desired wrapping behavior by masking out the high-order 32 bits.
+    resultWide = resultWide & 0xffffffffLL;
+    // Casting to a narrower signed type is fine since the casted value is representable in the
+    // narrower type.
+    return static_cast<int32_t>(resultWide);
+}
+
+inline float scaleScreenDimensionToNdc(float dimensionScreen, float viewportDimension)
+{
+    return 2.0f * dimensionScreen / viewportDimension;
+}
+
+inline float scaleScreenCoordinateToNdc(float coordinateScreen, float viewportDimension)
+{
+    float halfShifted = coordinateScreen / viewportDimension;
+    return 2.0f * (halfShifted - 0.5f);
+}
+
+}  // namespace gl
+
+namespace rx
+{
+
+template <typename T>
+T roundUp(const T value, const T alignment)
+{
+    auto temp = value + alignment - static_cast<T>(1);
+    return temp - temp % alignment;
+}
+
+template <typename T>
+constexpr T roundUpPow2(const T value, const T alignment)
+{
+    ASSERT(gl::isPow2(alignment));
+    return (value + alignment - 1) & ~(alignment - 1);
+}
+
+template <typename T>
+constexpr T roundDownPow2(const T value, const T alignment)
+{
+    ASSERT(gl::isPow2(alignment));
+    return value & ~(alignment - 1);
+}
+
+template <typename T>
+angle::CheckedNumeric<T> CheckedRoundUp(const T value, const T alignment)
+{
+    angle::CheckedNumeric<T> checkedValue(value);
+    angle::CheckedNumeric<T> checkedAlignment(alignment);
+    return roundUp(checkedValue, checkedAlignment);
+}
+
+inline constexpr unsigned int UnsignedCeilDivide(unsigned int value, unsigned int divisor)
+{
+    unsigned int divided = value / divisor;
+    return (divided + ((value % divisor == 0) ? 0 : 1));
+}
+
+#if defined(__has_builtin)
+#    define ANGLE_HAS_BUILTIN(x) __has_builtin(x)
+#else
+#    define ANGLE_HAS_BUILTIN(x) 0
+#endif
+
+#if defined(_MSC_VER)
+
+#    define ANGLE_ROTL(x, y) _rotl(x, y)
+#    define ANGLE_ROTL64(x, y) _rotl64(x, y)
+#    define ANGLE_ROTR16(x, y) _rotr16(x, y)
+
+#elif defined(__clang__) && ANGLE_HAS_BUILTIN(__builtin_rotateleft32) && \
+    ANGLE_HAS_BUILTIN(__builtin_rotateleft64) && ANGLE_HAS_BUILTIN(__builtin_rotateright16)
+
+#    define ANGLE_ROTL(x, y) __builtin_rotateleft32(x, y)
+#    define ANGLE_ROTL64(x, y) __builtin_rotateleft64(x, y)
+#    define ANGLE_ROTR16(x, y) __builtin_rotateright16(x, y)
+
+#else
+
+inline uint32_t RotL(uint32_t x, int8_t r)
+{
+    return (x << r) | (x >> (32 - r));
+}
+
+inline uint64_t RotL64(uint64_t x, int8_t r)
+{
+    return (x << r) | (x >> (64 - r));
+}
+
+inline uint16_t RotR16(uint16_t x, int8_t r)
+{
+    return (x >> r) | (x << (16 - r));
+}
+
+#    define ANGLE_ROTL(x, y) ::rx::RotL(x, y)
+#    define ANGLE_ROTL64(x, y) ::rx::RotL64(x, y)
+#    define ANGLE_ROTR16(x, y) ::rx::RotR16(x, y)
+
+#endif  // namespace rx
+
+constexpr unsigned int Log2(unsigned int bytes)
+{
+    return bytes == 1 ? 0 : (1 + Log2(bytes / 2));
+}
+}  // namespace rx
+
+#endif  // COMMON_MATHUTIL_H_
diff --git a/gfx/angle/checkout/src/common/matrix_utils.cpp b/gfx/angle/checkout/src/common/matrix_utils.cpp
new file mode 100644
index 0000000000..59ab4ca437
--- /dev/null
+++ b/gfx/angle/checkout/src/common/matrix_utils.cpp
@@ -0,0 +1,285 @@
+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// matrix_utils.cpp: Contains implementations for Mat4 methods.
+
+#include "common/matrix_utils.h"
+
+namespace angle
+{
+
+Mat4::Mat4() : Mat4(1.f, 0.f, 0.f, 0.f, 0.f, 1.f, 0.f, 0.f, 0.f, 0.f, 1.f, 0.f, 0.f, 0.f, 0.f, 1.f)
+{}
+
+Mat4::Mat4(const Matrix<float> generalMatrix) : Matrix(std::vector<float>(16, 0), 4, 4)
+{
+    unsigned int minCols = std::min((unsigned int)4, generalMatrix.columns());
+    unsigned int minRows = std::min((unsigned int)4, generalMatrix.rows());
+    for (unsigned int i = 0; i < minCols; i++)
+    {
+        for (unsigned int j = 0; j < minRows; j++)
+        {
+            mElements[j * minCols + i] = generalMatrix.at(j, i);
+        }
+    }
+}
+
+Mat4::Mat4(const std::vector<float> &elements) : Matrix(elements, 4) {}
+
+Mat4::Mat4(const float *elements) : Matrix(elements, 4) {}
+
+Mat4::Mat4(float m00,
+           float m01,
+           float m02,
+           float m03,
+           float m10,
+           float m11,
+           float m12,
+           float m13,
+           float m20,
+           float m21,
+           float m22,
+           float m23,
+           float m30,
+           float m31,
+           float m32,
+           float m33)
+    : Matrix(std::vector<float>(16, 0), 4, 4)
+{
+    mElements[0]  = m00;
+    mElements[1]  = m01;
+    mElements[2]  = m02;
+    mElements[3]  = m03;
+    mElements[4]  = m10;
+    mElements[5]  = m11;
+    mElements[6]  = m12;
+    mElements[7]  = m13;
+    mElements[8]  = m20;
+    mElements[9]  = m21;
+    mElements[10] = m22;
+    mElements[11] = m23;
+    mElements[12] = m30;
+    mElements[13] = m31;
+    mElements[14] = m32;
+    mElements[15] = m33;
+}
+
+// static
+Mat4 Mat4::Rotate(float angle, const Vector3 &axis)
+{
+    auto axis_normalized = axis.normalized();
+    float angle_radians  = angle * (3.14159265358979323f / 180.0f);
+    float c              = cos(angle_radians);
+    float ci             = 1.f - c;
+    float s              = sin(angle_radians);
+
+    float x = axis_normalized.x();
+    float y = axis_normalized.y();
+    float z = axis_normalized.z();
+
+    float x2 = x * x;
+    float y2 = y * y;
+    float z2 = z * z;
+
+    float xy = x * y;
+    float yz = y * z;
+    float zx = z * x;
+
+    float r00 = c + ci * x2;
+    float r01 = ci * xy + s * z;
+    float r02 = ci * zx - s * y;
+    float r03 = 0.f;
+
+    float r10 = ci * xy - s * z;
+    float r11 = c + ci * y2;
+    float r12 = ci * yz + s * x;
+    float r13 = 0.f;
+
+    float r20 = ci * zx + s * y;
+    float r21 = ci * yz - s * x;
+    float r22 = c + ci * z2;
+    float r23 = 0.f;
+
+    float r30 = 0.f;
+    float r31 = 0.f;
+    float r32 = 0.f;
+    float r33 = 1.f;
+
+    return Mat4(r00, r01, r02, r03, r10, r11, r12, r13, r20, r21, r22, r23, r30, r31, r32, r33);
+}
+
+// static
+Mat4 Mat4::Translate(const Vector3 &t)
+{
+    float r00 = 1.f;
+    float r01 = 0.f;
+    float r02 = 0.f;
+    float r03 = 0.f;
+
+    float r10 = 0.f;
+    float r11 = 1.f;
+    float r12 = 0.f;
+    float r13 = 0.f;
+
+    float r20 = 0.f;
+    float r21 = 0.f;
+    float r22 = 1.f;
+    float r23 = 0.f;
+
+    float r30 = t.x();
+    float r31 = t.y();
+    float r32 = t.z();
+    float r33 = 1.f;
+
+    return Mat4(r00, r01, r02, r03, r10, r11, r12, r13, r20, r21, r22, r23, r30, r31, r32, r33);
+}
+
+// static
+Mat4 Mat4::Scale(const Vector3 &s)
+{
+    float r00 = s.x();
+    float r01 = 0.f;
+    float r02 = 0.f;
+    float r03 = 0.f;
+
+    float r10 = 0.f;
+    float r11 = s.y();
+    float r12 = 0.f;
+    float r13 = 0.f;
+
+    float r20 = 0.f;
+    float r21 = 0.f;
+    float r22 = s.z();
+    float r23 = 0.f;
+
+    float r30 = 0.f;
+    float r31 = 0.f;
+    float r32 = 0.f;
+    float r33 = 1.f;
+
+    return Mat4(r00, r01, r02, r03, r10, r11, r12, r13, r20, r21, r22, r23, r30, r31, r32, r33);
+}
+
+// static
+Mat4 Mat4::Frustum(float l, float r, float b, float t, float n, float f)
+{
+    float nn  = 2.f * n;
+    float fpn = f + n;
+    float fmn = f - n;
+    float tpb = t + b;
+    float tmb = t - b;
+    float rpl = r + l;
+    float rml = r - l;
+
+    float r00 = nn / rml;
+    float r01 = 0.f;
+    float r02 = 0.f;
+    float r03 = 0.f;
+
+    float r10 = 0.f;
+    float r11 = nn / tmb;
+    float r12 = 0.f;
+    float r13 = 0.f;
+
+    float r20 = rpl / rml;
+    float r21 = tpb / tmb;
+    float r22 = -fpn / fmn;
+    float r23 = -1.f;
+
+    float r30 = 0.f;
+    float r31 = 0.f;
+    float r32 = -nn * f / fmn;
+    float r33 = 0.f;
+
+    return Mat4(r00, r01, r02, r03, r10, r11, r12, r13, r20, r21, r22, r23, r30, r31, r32, r33);
+}
+
+// static
+Mat4 Mat4::Perspective(float fov, float aspectRatio, float n, float f)
+{
+    const float frustumHeight = tanf(static_cast<float>(fov / 360.0f * 3.14159265358979323)) * n;
+    const float frustumWidth  = frustumHeight * aspectRatio;
+    return Frustum(-frustumWidth, frustumWidth, -frustumHeight, frustumHeight, n, f);
+}
+
+// static
+Mat4 Mat4::Ortho(float l, float r, float b, float t, float n, float f)
+{
+    float fpn = f + n;
+    float fmn = f - n;
+    float tpb = t + b;
+    float tmb = t - b;
+    float rpl = r + l;
+    float rml = r - l;
+
+    float r00 = 2.f / rml;
+    float r01 = 0.f;
+    float r02 = 0.f;
+    float r03 = 0.f;
+
+    float r10 = 0.f;
+    float r11 = 2.f / tmb;
+    float r12 = 0.f;
+    float r13 = 0.f;
+
+    float r20 = 0.f;
+    float r21 = 0.f;
+    float r22 = -2.f / fmn;
+    float r23 = 0.f;
+
+    float r30 = -rpl / rml;
+    float r31 = -tpb / tmb;
+    float r32 = -fpn / fmn;
+    float r33 = 1.f;
+
+    return Mat4(r00, r01, r02, r03, r10, r11, r12, r13, r20, r21, r22, r23, r30, r31, r32, r33);
+}
+
+Mat4 Mat4::product(const Mat4 &m)
+{
+    const float *a = mElements.data();
+    const float *b = m.mElements.data();
+
+    return Mat4(a[0] * b[0] + a[4] * b[1] + a[8] * b[2] + a[12] * b[3],
+                a[1] * b[0] + a[5] * b[1] + a[9] * b[2] + a[13] * b[3],
+                a[2] * b[0] + a[6] * b[1] + a[10] * b[2] + a[14] * b[3],
+                a[3] * b[0] + a[7] * b[1] + a[11] * b[2] + a[15] * b[3],
+
+                a[0] * b[4] + a[4] * b[5] + a[8] * b[6] + a[12] * b[7],
+                a[1] * b[4] + a[5] * b[5] + a[9] * b[6] + a[13] * b[7],
+                a[2] * b[4] + a[6] * b[5] + a[10] * b[6] + a[14] * b[7],
+                a[3] * b[4] + a[7] * b[5] + a[11] * b[6] + a[15] * b[7],
+
+                a[0] * b[8] + a[4] * b[9] + a[8] * b[10] + a[12] * b[11],
+                a[1] * b[8] + a[5] * b[9] + a[9] * b[10] + a[13] * b[11],
+                a[2] * b[8] + a[6] * b[9] + a[10] * b[10] + a[14] * b[11],
+                a[3] * b[8] + a[7] * b[9] + a[11] * b[10] + a[15] * b[11],
+
+                a[0] * b[12] + a[4] * b[13] + a[8] * b[14] + a[12] * b[15],
+                a[1] * b[12] + a[5] * b[13] + a[9] * b[14] + a[13] * b[15],
+                a[2] * b[12] + a[6] * b[13] + a[10] * b[14] + a[14] * b[15],
+                a[3] * b[12] + a[7] * b[13] + a[11] * b[14] + a[15] * b[15]);
+}
+
+Vector4 Mat4::product(const Vector4 &b)
+{
+    return Vector4(
+        mElements[0] * b.x() + mElements[4] * b.y() + mElements[8] * b.z() + mElements[12] * b.w(),
+        mElements[1] * b.x() + mElements[5] * b.y() + mElements[9] * b.z() + mElements[13] * b.w(),
+        mElements[2] * b.x() + mElements[6] * b.y() + mElements[10] * b.z() + mElements[14] * b.w(),
+        mElements[3] * b.x() + mElements[7] * b.y() + mElements[11] * b.z() +
+            mElements[15] * b.w());
+}
+
+void Mat4::dump()
+{
+    printf("[ %f %f %f %f ]\n", mElements[0], mElements[4], mElements[8], mElements[12]);
+    printf("[ %f %f %f %f ]\n", mElements[1], mElements[5], mElements[9], mElements[13]);
+    printf("[ %f %f %f %f ]\n", mElements[2], mElements[6], mElements[10], mElements[14]);
+    printf("[ %f %f %f %f ]\n", mElements[3], mElements[7], mElements[11], mElements[15]);
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/matrix_utils.h b/gfx/angle/checkout/src/common/matrix_utils.h
new file mode 100644
index 0000000000..7cca7a9461
--- /dev/null
+++ b/gfx/angle/checkout/src/common/matrix_utils.h
@@ -0,0 +1,424 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Matrix:
+//   Utility class implementing various matrix operations.
+//   Supports matrices with minimum 2 and maximum 4 number of rows/columns.
+//
+// TODO: Check if we can merge Matrix.h in sample_util with this and replace it with this
+// implementation.
+// TODO: Rename this file to Matrix.h once we remove Matrix.h in sample_util.
+
+#ifndef COMMON_MATRIX_UTILS_H_
+#define COMMON_MATRIX_UTILS_H_
+
+#include <vector>
+
+#include "common/debug.h"
+#include "common/mathutil.h"
+#include "common/vector_utils.h"
+
+namespace angle
+{
+
+template <typename T>
+class Matrix
+{
+  public:
+    Matrix(const std::vector<T> &elements, const unsigned int numRows, const unsigned int numCols)
+        : mElements(elements), mRows(numRows), mCols(numCols)
+    {
+        ASSERT(rows() >= 1 && rows() <= 4);
+        ASSERT(columns() >= 1 && columns() <= 4);
+    }
+
+    Matrix(const std::vector<T> &elements, const unsigned int size)
+        : mElements(elements), mRows(size), mCols(size)
+    {
+        ASSERT(rows() >= 1 && rows() <= 4);
+        ASSERT(columns() >= 1 && columns() <= 4);
+    }
+
+    Matrix(const T *elements, const unsigned int size) : mRows(size), mCols(size)
+    {
+        ASSERT(rows() >= 1 && rows() <= 4);
+        ASSERT(columns() >= 1 && columns() <= 4);
+        for (size_t i = 0; i < size * size; i++)
+            mElements.push_back(elements[i]);
+    }
+
+    const T &operator()(const unsigned int rowIndex, const unsigned int columnIndex) const
+    {
+        ASSERT(rowIndex < mRows);
+        ASSERT(columnIndex < mCols);
+        return mElements[rowIndex * columns() + columnIndex];
+    }
+
+    T &operator()(const unsigned int rowIndex, const unsigned int columnIndex)
+    {
+        ASSERT(rowIndex < mRows);
+        ASSERT(columnIndex < mCols);
+        return mElements[rowIndex * columns() + columnIndex];
+    }
+
+    const T &at(const unsigned int rowIndex, const unsigned int columnIndex) const
+    {
+        ASSERT(rowIndex < mRows);
+        ASSERT(columnIndex < mCols);
+        return operator()(rowIndex, columnIndex);
+    }
+
+    Matrix<T> operator*(const Matrix<T> &m)
+    {
+        ASSERT(columns() == m.rows());
+
+        unsigned int resultRows = rows();
+        unsigned int resultCols = m.columns();
+        Matrix<T> result(std::vector<T>(resultRows * resultCols), resultRows, resultCols);
+        for (unsigned int i = 0; i < resultRows; i++)
+        {
+            for (unsigned int j = 0; j < resultCols; j++)
+            {
+                T tmp = 0.0f;
+                for (unsigned int k = 0; k < columns(); k++)
+                    tmp += at(i, k) * m(k, j);
+                result(i, j) = tmp;
+            }
+        }
+
+        return result;
+    }
+
+    void operator*=(const Matrix<T> &m)
+    {
+        ASSERT(columns() == m.rows());
+        Matrix<T> res  = (*this) * m;
+        size_t numElts = res.elements().size();
+        mElements.resize(numElts);
+        memcpy(mElements.data(), res.data(), numElts * sizeof(float));
+    }
+
+    bool operator==(const Matrix<T> &m) const
+    {
+        ASSERT(columns() == m.columns());
+        ASSERT(rows() == m.rows());
+        return mElements == m.elements();
+    }
+
+    bool operator!=(const Matrix<T> &m) const { return !(mElements == m.elements()); }
+
+    bool nearlyEqual(T epsilon, const Matrix<T> &m) const
+    {
+        ASSERT(columns() == m.columns());
+        ASSERT(rows() == m.rows());
+        const auto &otherElts = m.elements();
+        for (size_t i = 0; i < otherElts.size(); i++)
+        {
+            if ((mElements[i] - otherElts[i] > epsilon) && (otherElts[i] - mElements[i] > epsilon))
+                return false;
+        }
+        return true;
+    }
+
+    unsigned int size() const
+    {
+        ASSERT(rows() == columns());
+        return rows();
+    }
+
+    unsigned int rows() const { return mRows; }
+
+    unsigned int columns() const { return mCols; }
+
+    std::vector<T> elements() const { return mElements; }
+    T *data() { return mElements.data(); }
+    const T *constData() const { return mElements.data(); }
+
+    Matrix<T> compMult(const Matrix<T> &mat1) const
+    {
+        Matrix result(std::vector<T>(mElements.size()), rows(), columns());
+        for (unsigned int i = 0; i < rows(); i++)
+        {
+            for (unsigned int j = 0; j < columns(); j++)
+            {
+                T lhs        = at(i, j);
+                T rhs        = mat1(i, j);
+                result(i, j) = rhs * lhs;
+            }
+        }
+
+        return result;
+    }
+
+    Matrix<T> outerProduct(const Matrix<T> &mat1) const
+    {
+        unsigned int cols = mat1.columns();
+        Matrix result(std::vector<T>(rows() * cols), rows(), cols);
+        for (unsigned int i = 0; i < rows(); i++)
+            for (unsigned int j = 0; j < cols; j++)
+                result(i, j) = at(i, 0) * mat1(0, j);
+
+        return result;
+    }
+
+    Matrix<T> transpose() const
+    {
+        Matrix result(std::vector<T>(mElements.size()), columns(), rows());
+        for (unsigned int i = 0; i < columns(); i++)
+            for (unsigned int j = 0; j < rows(); j++)
+                result(i, j) = at(j, i);
+
+        return result;
+    }
+
+    T determinant() const
+    {
+        ASSERT(rows() == columns());
+
+        switch (size())
+        {
+            case 2:
+                return at(0, 0) * at(1, 1) - at(0, 1) * at(1, 0);
+
+            case 3:
+                return at(0, 0) * at(1, 1) * at(2, 2) + at(0, 1) * at(1, 2) * at(2, 0) +
+                       at(0, 2) * at(1, 0) * at(2, 1) - at(0, 2) * at(1, 1) * at(2, 0) -
+                       at(0, 1) * at(1, 0) * at(2, 2) - at(0, 0) * at(1, 2) * at(2, 1);
+
+            case 4:
+            {
+                const float minorMatrices[4][3 * 3] = {{
+                                                           at(1, 1),
+                                                           at(2, 1),
+                                                           at(3, 1),
+                                                           at(1, 2),
+                                                           at(2, 2),
+                                                           at(3, 2),
+                                                           at(1, 3),
+                                                           at(2, 3),
+                                                           at(3, 3),
+                                                       },
+                                                       {
+                                                           at(1, 0),
+                                                           at(2, 0),
+                                                           at(3, 0),
+                                                           at(1, 2),
+                                                           at(2, 2),
+                                                           at(3, 2),
+                                                           at(1, 3),
+                                                           at(2, 3),
+                                                           at(3, 3),
+                                                       },
+                                                       {
+                                                           at(1, 0),
+                                                           at(2, 0),
+                                                           at(3, 0),
+                                                           at(1, 1),
+                                                           at(2, 1),
+                                                           at(3, 1),
+                                                           at(1, 3),
+                                                           at(2, 3),
+                                                           at(3, 3),
+                                                       },
+                                                       {
+                                                           at(1, 0),
+                                                           at(2, 0),
+                                                           at(3, 0),
+                                                           at(1, 1),
+                                                           at(2, 1),
+                                                           at(3, 1),
+                                                           at(1, 2),
+                                                           at(2, 2),
+                                                           at(3, 2),
+                                                       }};
+                return at(0, 0) * Matrix<T>(minorMatrices[0], 3).determinant() -
+                       at(0, 1) * Matrix<T>(minorMatrices[1], 3).determinant() +
+                       at(0, 2) * Matrix<T>(minorMatrices[2], 3).determinant() -
+                       at(0, 3) * Matrix<T>(minorMatrices[3], 3).determinant();
+            }
+
+            default:
+                UNREACHABLE();
+                break;
+        }
+
+        return T();
+    }
+
+    Matrix<T> inverse() const
+    {
+        ASSERT(rows() == columns());
+
+        Matrix<T> cof(std::vector<T>(mElements.size()), rows(), columns());
+        switch (size())
+        {
+            case 2:
+                cof(0, 0) = at(1, 1);
+                cof(0, 1) = -at(1, 0);
+                cof(1, 0) = -at(0, 1);
+                cof(1, 1) = at(0, 0);
+                break;
+
+            case 3:
+                cof(0, 0) = at(1, 1) * at(2, 2) - at(2, 1) * at(1, 2);
+                cof(0, 1) = -(at(1, 0) * at(2, 2) - at(2, 0) * at(1, 2));
+                cof(0, 2) = at(1, 0) * at(2, 1) - at(2, 0) * at(1, 1);
+                cof(1, 0) = -(at(0, 1) * at(2, 2) - at(2, 1) * at(0, 2));
+                cof(1, 1) = at(0, 0) * at(2, 2) - at(2, 0) * at(0, 2);
+                cof(1, 2) = -(at(0, 0) * at(2, 1) - at(2, 0) * at(0, 1));
+                cof(2, 0) = at(0, 1) * at(1, 2) - at(1, 1) * at(0, 2);
+                cof(2, 1) = -(at(0, 0) * at(1, 2) - at(1, 0) * at(0, 2));
+                cof(2, 2) = at(0, 0) * at(1, 1) - at(1, 0) * at(0, 1);
+                break;
+
+            case 4:
+                cof(0, 0) = at(1, 1) * at(2, 2) * at(3, 3) + at(2, 1) * at(3, 2) * at(1, 3) +
+                            at(3, 1) * at(1, 2) * at(2, 3) - at(1, 1) * at(3, 2) * at(2, 3) -
+                            at(2, 1) * at(1, 2) * at(3, 3) - at(3, 1) * at(2, 2) * at(1, 3);
+                cof(0, 1) = -(at(1, 0) * at(2, 2) * at(3, 3) + at(2, 0) * at(3, 2) * at(1, 3) +
+                              at(3, 0) * at(1, 2) * at(2, 3) - at(1, 0) * at(3, 2) * at(2, 3) -
+                              at(2, 0) * at(1, 2) * at(3, 3) - at(3, 0) * at(2, 2) * at(1, 3));
+                cof(0, 2) = at(1, 0) * at(2, 1) * at(3, 3) + at(2, 0) * at(3, 1) * at(1, 3) +
+                            at(3, 0) * at(1, 1) * at(2, 3) - at(1, 0) * at(3, 1) * at(2, 3) -
+                            at(2, 0) * at(1, 1) * at(3, 3) - at(3, 0) * at(2, 1) * at(1, 3);
+                cof(0, 3) = -(at(1, 0) * at(2, 1) * at(3, 2) + at(2, 0) * at(3, 1) * at(1, 2) +
+                              at(3, 0) * at(1, 1) * at(2, 2) - at(1, 0) * at(3, 1) * at(2, 2) -
+                              at(2, 0) * at(1, 1) * at(3, 2) - at(3, 0) * at(2, 1) * at(1, 2));
+                cof(1, 0) = -(at(0, 1) * at(2, 2) * at(3, 3) + at(2, 1) * at(3, 2) * at(0, 3) +
+                              at(3, 1) * at(0, 2) * at(2, 3) - at(0, 1) * at(3, 2) * at(2, 3) -
+                              at(2, 1) * at(0, 2) * at(3, 3) - at(3, 1) * at(2, 2) * at(0, 3));
+                cof(1, 1) = at(0, 0) * at(2, 2) * at(3, 3) + at(2, 0) * at(3, 2) * at(0, 3) +
+                            at(3, 0) * at(0, 2) * at(2, 3) - at(0, 0) * at(3, 2) * at(2, 3) -
+                            at(2, 0) * at(0, 2) * at(3, 3) - at(3, 0) * at(2, 2) * at(0, 3);
+                cof(1, 2) = -(at(0, 0) * at(2, 1) * at(3, 3) + at(2, 0) * at(3, 1) * at(0, 3) +
+                              at(3, 0) * at(0, 1) * at(2, 3) - at(0, 0) * at(3, 1) * at(2, 3) -
+                              at(2, 0) * at(0, 1) * at(3, 3) - at(3, 0) * at(2, 1) * at(0, 3));
+                cof(1, 3) = at(0, 0) * at(2, 1) * at(3, 2) + at(2, 0) * at(3, 1) * at(0, 2) +
+                            at(3, 0) * at(0, 1) * at(2, 2) - at(0, 0) * at(3, 1) * at(2, 2) -
+                            at(2, 0) * at(0, 1) * at(3, 2) - at(3, 0) * at(2, 1) * at(0, 2);
+                cof(2, 0) = at(0, 1) * at(1, 2) * at(3, 3) + at(1, 1) * at(3, 2) * at(0, 3) +
+                            at(3, 1) * at(0, 2) * at(1, 3) - at(0, 1) * at(3, 2) * at(1, 3) -
+                            at(1, 1) * at(0, 2) * at(3, 3) - at(3, 1) * at(1, 2) * at(0, 3);
+                cof(2, 1) = -(at(0, 0) * at(1, 2) * at(3, 3) + at(1, 0) * at(3, 2) * at(0, 3) +
+                              at(3, 0) * at(0, 2) * at(1, 3) - at(0, 0) * at(3, 2) * at(1, 3) -
+                              at(1, 0) * at(0, 2) * at(3, 3) - at(3, 0) * at(1, 2) * at(0, 3));
+                cof(2, 2) = at(0, 0) * at(1, 1) * at(3, 3) + at(1, 0) * at(3, 1) * at(0, 3) +
+                            at(3, 0) * at(0, 1) * at(1, 3) - at(0, 0) * at(3, 1) * at(1, 3) -
+                            at(1, 0) * at(0, 1) * at(3, 3) - at(3, 0) * at(1, 1) * at(0, 3);
+                cof(2, 3) = -(at(0, 0) * at(1, 1) * at(3, 2) + at(1, 0) * at(3, 1) * at(0, 2) +
+                              at(3, 0) * at(0, 1) * at(1, 2) - at(0, 0) * at(3, 1) * at(1, 2) -
+                              at(1, 0) * at(0, 1) * at(3, 2) - at(3, 0) * at(1, 1) * at(0, 2));
+                cof(3, 0) = -(at(0, 1) * at(1, 2) * at(2, 3) + at(1, 1) * at(2, 2) * at(0, 3) +
+                              at(2, 1) * at(0, 2) * at(1, 3) - at(0, 1) * at(2, 2) * at(1, 3) -
+                              at(1, 1) * at(0, 2) * at(2, 3) - at(2, 1) * at(1, 2) * at(0, 3));
+                cof(3, 1) = at(0, 0) * at(1, 2) * at(2, 3) + at(1, 0) * at(2, 2) * at(0, 3) +
+                            at(2, 0) * at(0, 2) * at(1, 3) - at(0, 0) * at(2, 2) * at(1, 3) -
+                            at(1, 0) * at(0, 2) * at(2, 3) - at(2, 0) * at(1, 2) * at(0, 3);
+                cof(3, 2) = -(at(0, 0) * at(1, 1) * at(2, 3) + at(1, 0) * at(2, 1) * at(0, 3) +
+                              at(2, 0) * at(0, 1) * at(1, 3) - at(0, 0) * at(2, 1) * at(1, 3) -
+                              at(1, 0) * at(0, 1) * at(2, 3) - at(2, 0) * at(1, 1) * at(0, 3));
+                cof(3, 3) = at(0, 0) * at(1, 1) * at(2, 2) + at(1, 0) * at(2, 1) * at(0, 2) +
+                            at(2, 0) * at(0, 1) * at(1, 2) - at(0, 0) * at(2, 1) * at(1, 2) -
+                            at(1, 0) * at(0, 1) * at(2, 2) - at(2, 0) * at(1, 1) * at(0, 2);
+                break;
+
+            default:
+                UNREACHABLE();
+                break;
+        }
+
+        // The inverse of A is the transpose of the cofactor matrix times the reciprocal of the
+        // determinant of A.
+        Matrix<T> adjugateMatrix(cof.transpose());
+        T det = determinant();
+        Matrix<T> result(std::vector<T>(mElements.size()), rows(), columns());
+        for (unsigned int i = 0; i < rows(); i++)
+            for (unsigned int j = 0; j < columns(); j++)
+                result(i, j) = (det != static_cast<T>(0)) ? adjugateMatrix(i, j) / det : T();
+
+        return result;
+    }
+
+    void setToIdentity()
+    {
+        ASSERT(rows() == columns());
+
+        const auto one  = T(1);
+        const auto zero = T(0);
+
+        for (auto &e : mElements)
+            e = zero;
+
+        for (unsigned int i = 0; i < rows(); ++i)
+        {
+            const auto pos = i * columns() + (i % columns());
+            mElements[pos] = one;
+        }
+    }
+
+    template <unsigned int Size>
+    static void setToIdentity(T (&matrix)[Size])
+    {
+        static_assert(gl::iSquareRoot<Size>() != 0, "Matrix is not square.");
+
+        const auto cols = gl::iSquareRoot<Size>();
+        const auto one  = T(1);
+        const auto zero = T(0);
+
+        for (auto &e : matrix)
+            e = zero;
+
+        for (unsigned int i = 0; i < cols; ++i)
+        {
+            const auto pos = i * cols + (i % cols);
+            matrix[pos]    = one;
+        }
+    }
+
+  protected:
+    std::vector<T> mElements;
+    unsigned int mRows;
+    unsigned int mCols;
+};
+
+class Mat4 : public Matrix<float>
+{
+  public:
+    Mat4();
+    Mat4(const Matrix<float> generalMatrix);
+    Mat4(const std::vector<float> &elements);
+    Mat4(const float *elements);
+    Mat4(float m00,
+         float m01,
+         float m02,
+         float m03,
+         float m10,
+         float m11,
+         float m12,
+         float m13,
+         float m20,
+         float m21,
+         float m22,
+         float m23,
+         float m30,
+         float m31,
+         float m32,
+         float m33);
+
+    static Mat4 Rotate(float angle, const Vector3 &axis);
+    static Mat4 Translate(const Vector3 &t);
+    static Mat4 Scale(const Vector3 &s);
+    static Mat4 Frustum(float l, float r, float b, float t, float n, float f);
+    static Mat4 Perspective(float fov, float aspectRatio, float n, float f);
+    static Mat4 Ortho(float l, float r, float b, float t, float n, float f);
+
+    Mat4 product(const Mat4 &m);
+    Vector4 product(const Vector4 &b);
+    void dump();
+};
+
+}  // namespace angle
+
+#endif  // COMMON_MATRIX_UTILS_H_
diff --git a/gfx/angle/checkout/src/common/platform.h b/gfx/angle/checkout/src/common/platform.h
new file mode 100644
index 0000000000..77267ab680
--- /dev/null
+++ b/gfx/angle/checkout/src/common/platform.h
@@ -0,0 +1,209 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// platform.h: Operating system specific includes and defines.
+
+#ifndef COMMON_PLATFORM_H_
+#define COMMON_PLATFORM_H_
+
+#if defined(_WIN32)
+#    define ANGLE_PLATFORM_WINDOWS 1
+#elif defined(__Fuchsia__)
+#    define ANGLE_PLATFORM_FUCHSIA 1
+#    define ANGLE_PLATFORM_POSIX 1
+#elif defined(__APPLE__)
+#    define ANGLE_PLATFORM_APPLE 1
+#    define ANGLE_PLATFORM_POSIX 1
+#elif defined(ANDROID)
+#    define ANGLE_PLATFORM_ANDROID 1
+#    define ANGLE_PLATFORM_POSIX 1
+#elif defined(__ggp__)
+#    define ANGLE_PLATFORM_GGP 1
+#    define ANGLE_PLATFORM_POSIX 1
+#elif defined(__linux__) || defined(EMSCRIPTEN)
+#    define ANGLE_PLATFORM_LINUX 1
+#    define ANGLE_PLATFORM_POSIX 1
+#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) ||              \
+    defined(__DragonFly__) || defined(__sun) || defined(__GLIBC__) || defined(__GNU__) || \
+    defined(__QNX__) || defined(__Fuchsia__) || defined(__HAIKU__)
+#    define ANGLE_PLATFORM_POSIX 1
+#else
+#    error Unsupported platform.
+#endif
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+#    ifndef STRICT
+#        define STRICT 1
+#    endif
+#    ifndef WIN32_LEAN_AND_MEAN
+#        define WIN32_LEAN_AND_MEAN 1
+#    endif
+#    ifndef NOMINMAX
+#        define NOMINMAX 1
+#    endif
+
+#    include <intrin.h>
+
+#    if defined(WINAPI_FAMILY) && (WINAPI_FAMILY != WINAPI_FAMILY_DESKTOP_APP)
+#        define ANGLE_ENABLE_WINDOWS_UWP 1
+#    endif
+
+#    if defined(ANGLE_ENABLE_D3D9)
+#        include <d3d9.h>
+#        include <d3dcompiler.h>
+#    endif
+
+// Include D3D11 headers when OpenGL is enabled on Windows for interop extensions.
+#    if defined(ANGLE_ENABLE_D3D11) || defined(ANGLE_ENABLE_OPENGL)
+#        include <d3d10_1.h>
+#        include <d3d11.h>
+#        include <d3d11_3.h>
+#        include <d3d11on12.h>
+#        include <d3d12.h>
+#        include <d3dcompiler.h>
+#        include <dxgi.h>
+#        include <dxgi1_2.h>
+#        include <dxgi1_4.h>
+#    endif
+
+#    if defined(ANGLE_ENABLE_D3D9) || defined(ANGLE_ENABLE_D3D11)
+#        include <wrl.h>
+#    endif
+
+#    if defined(ANGLE_ENABLE_WINDOWS_UWP)
+#        include <dxgi1_3.h>
+#        if defined(_DEBUG)
+#            include <DXProgrammableCapture.h>
+#            include <dxgidebug.h>
+#        endif
+#    endif
+
+// Include <windows.h> to ensure tests related files can be built when building
+// vulkan only backend ANGLE on windows.
+#    if defined(ANGLE_ENABLE_VULKAN)
+#        include <windows.h>
+#    endif
+
+// Macros 'near', 'far', 'NEAR' and 'FAR' are defined by 'shared/minwindef.h' in the Windows SDK.
+// Macros 'near' and 'far' are empty. They are not used by other Windows headers and are undefined
+// here to avoid identifier conflicts. Macros 'NEAR' and 'FAR' contain 'near' and 'far'. They are
+// used by other Windows headers and are cleared here to avoid compilation errors.
+#    undef near
+#    undef far
+#    undef NEAR
+#    undef FAR
+#    define NEAR
+#    define FAR
+#endif
+
+#if defined(_MSC_VER) && !defined(_M_ARM) && !defined(_M_ARM64)
+#    include <intrin.h>
+#    define ANGLE_USE_SSE
+#elif defined(__GNUC__) && (defined(__x86_64__) || defined(__i386__))
+#    include <x86intrin.h>
+#    define ANGLE_USE_SSE
+#endif
+
+// Mips and arm devices need to include stddef for size_t.
+#if defined(__mips__) || defined(__arm__) || defined(__aarch64__)
+#    include <stddef.h>
+#endif
+
+// The MemoryBarrier function name collides with a macro under Windows
+// We will undef the macro so that the function name does not get replaced
+#undef MemoryBarrier
+
+// Macro for hinting that an expression is likely to be true/false.
+#if !defined(ANGLE_LIKELY) || !defined(ANGLE_UNLIKELY)
+#    if defined(__GNUC__) || defined(__clang__)
+#        define ANGLE_LIKELY(x) __builtin_expect(!!(x), 1)
+#        define ANGLE_UNLIKELY(x) __builtin_expect(!!(x), 0)
+#    else
+#        define ANGLE_LIKELY(x) (x)
+#        define ANGLE_UNLIKELY(x) (x)
+#    endif  // defined(__GNUC__) || defined(__clang__)
+#endif      // !defined(ANGLE_LIKELY) || !defined(ANGLE_UNLIKELY)
+
+#ifdef ANGLE_PLATFORM_APPLE
+#    include <TargetConditionals.h>
+#    if TARGET_OS_OSX
+#        define ANGLE_PLATFORM_MACOS 1
+#    elif TARGET_OS_IPHONE
+#        define ANGLE_PLATFORM_IOS 1
+#        if TARGET_OS_SIMULATOR
+#            define ANGLE_PLATFORM_IOS_SIMULATOR 1
+#        endif
+#        if TARGET_OS_MACCATALYST
+#            define ANGLE_PLATFORM_MACCATALYST 1
+#        endif
+#    elif TARGET_OS_WATCH
+#        define ANGLE_PLATFORM_WATCHOS 1
+#        if TARGET_OS_SIMULATOR
+#            define ANGLE_PLATFORM_IOS_SIMULATOR 1
+#        endif
+#    elif TARGET_OS_TV
+#        define ANGLE_PLATFORM_APPLETV 1
+#        if TARGET_OS_SIMULATOR
+#            define ANGLE_PLATFORM_IOS_SIMULATOR 1
+#        endif
+#    endif
+#    // This might be useful globally. At the moment it is used
+#    // to differentiate MacCatalyst on Intel and Apple Silicon.
+#    if defined(__arm64__) || defined(__aarch64__)
+#        define ANGLE_CPU_ARM64 1
+#    endif
+#    // EAGL should be enabled on iOS, but not Mac Catalyst unless it is running on Apple Silicon.
+#    if (defined(ANGLE_PLATFORM_IOS) && !defined(ANGLE_PLATFORM_MACCATALYST)) || \
+        (defined(ANGLE_PLATFORM_MACCATALYST) && defined(ANGLE_CPU_ARM64))
+#        define ANGLE_ENABLE_EAGL
+#    endif
+#    // Identify Metal API >= what shipped on macOS Catalina.
+#    if (defined(ANGLE_PLATFORM_MACOS) && __MAC_OS_X_VERSION_MAX_ALLOWED >= 101500) || \
+        (defined(ANGLE_PLATFORM_IOS) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000)
+#        define ANGLE_WITH_MODERN_METAL_API 1
+#    endif
+#endif
+
+// Define ANGLE_WITH_ASAN macro.
+#if defined(__has_feature)
+#    if __has_feature(address_sanitizer)
+#        define ANGLE_WITH_ASAN 1
+#    endif
+#endif
+
+// Define ANGLE_WITH_MSAN macro.
+#if defined(__has_feature)
+#    if __has_feature(memory_sanitizer)
+#        define ANGLE_WITH_MSAN 1
+#    endif
+#endif
+
+// Define ANGLE_WITH_TSAN macro.
+#if defined(__has_feature)
+#    if __has_feature(thread_sanitizer)
+#        define ANGLE_WITH_TSAN 1
+#    endif
+#endif
+
+// Define ANGLE_WITH_UBSAN macro.
+#if defined(__has_feature)
+#    if __has_feature(undefined_behavior_sanitizer)
+#        define ANGLE_WITH_UBSAN 1
+#    endif
+#endif
+
+#if defined(ANGLE_WITH_ASAN) || defined(ANGLE_WITH_TSAN) || defined(ANGLE_WITH_UBSAN)
+#    define ANGLE_WITH_SANITIZER 1
+#endif  // defined(ANGLE_WITH_ASAN) || defined(ANGLE_WITH_TSAN) || defined(ANGLE_WITH_UBSAN)
+
+#include <cstdint>
+#if INTPTR_MAX == INT64_MAX
+#    define ANGLE_IS_64_BIT_CPU 1
+#else
+#    define ANGLE_IS_32_BIT_CPU 1
+#endif
+
+#endif  // COMMON_PLATFORM_H_
diff --git a/gfx/angle/checkout/src/common/spirv/spirv_types.h b/gfx/angle/checkout/src/common/spirv/spirv_types.h
new file mode 100644
index 0000000000..faf2174481
--- /dev/null
+++ b/gfx/angle/checkout/src/common/spirv/spirv_types.h
@@ -0,0 +1,133 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// spirv_types.h:
+//   Strong types for SPIR-V Ids to prevent mistakes when using the builder and parser APIs.
+//
+
+#ifndef COMMON_SPIRV_TYPES_H_
+#define COMMON_SPIRV_TYPES_H_
+
+#include "common/FastVector.h"
+
+#include <vector>
+
+namespace angle
+{
+namespace spirv
+{
+template <typename Helper>
+class BoxedUint32
+{
+  public:
+    BoxedUint32() : mValue{0} {}
+    explicit BoxedUint32(uint32_t value) : mValue{value} {}
+    template <typename T>
+    T as() const
+    {
+        return T{mValue};
+    }
+    BoxedUint32(const BoxedUint32 &other)            = default;
+    BoxedUint32 &operator=(const BoxedUint32 &other) = default;
+    operator uint32_t() const { return mValue.value; }
+    bool operator==(const BoxedUint32 &other) const { return mValue.value == other.mValue.value; }
+    // Applicable to ids, which cannot be 0.
+    bool valid() const { return static_cast<bool>(mValue.value); }
+
+  private:
+    Helper mValue;
+};
+
+struct IdRefHelper
+{
+    uint32_t value;
+};
+struct LiteralIntegerHelper
+{
+    uint32_t value;
+};
+
+using IdRef = BoxedUint32<IdRefHelper>;
+
+template <>
+inline BoxedUint32<IdRefHelper>::operator uint32_t() const
+{
+    ASSERT(valid());
+    return mValue.value;
+}
+
+// IdResult, IdResultType, IdMemorySemantics and IdScope are all translated as IdRef.  This makes
+// the type verification weaker, but stops the API from becoming tediously verbose.
+using IdResult          = IdRef;
+using IdResultType      = IdRef;
+using IdMemorySemantics = IdRef;
+using IdScope           = IdRef;
+using LiteralInteger    = BoxedUint32<LiteralIntegerHelper>;
+using LiteralString     = const char *;
+// Note: In ANGLE's use cases, all literals fit in 32 bits.
+using LiteralContextDependentNumber = LiteralInteger;
+// TODO(syoussefi): To be made stronger when generating SPIR-V from the translator.
+// http://anglebug.com/4889
+using LiteralExtInstInteger = LiteralInteger;
+
+struct PairLiteralIntegerIdRef
+{
+    LiteralInteger literal;
+    IdRef id;
+};
+
+struct PairIdRefLiteralInteger
+{
+    IdRef id;
+    LiteralInteger literal;
+};
+
+struct PairIdRefIdRef
+{
+    IdRef id1;
+    IdRef id2;
+};
+
+// Some instructions need 4 components.  The drivers uniform struct in ANGLE has 8 fields.  A value
+// of 8 means almost no instruction would end up making dynamic allocations.  Notable exceptions are
+// user-defined structs/blocks and OpEntryPoint.
+constexpr size_t kFastVectorSize = 8;
+
+template <typename T>
+using FastVectorHelper = angle::FastVector<T, kFastVectorSize>;
+
+using IdRefList                   = FastVectorHelper<IdRef>;
+using LiteralIntegerList          = FastVectorHelper<LiteralInteger>;
+using PairLiteralIntegerIdRefList = FastVectorHelper<PairLiteralIntegerIdRef>;
+using PairIdRefLiteralIntegerList = FastVectorHelper<PairIdRefLiteralInteger>;
+using PairIdRefIdRefList          = FastVectorHelper<PairIdRefIdRef>;
+
+// Id 0 is invalid in SPIR-V.
+constexpr uint32_t kMinValidId = 1;
+
+// The SPIR-V blob is a sequence of uint32_t's
+using Blob = std::vector<uint32_t>;
+
+// Format of the SPIR-V header.
+// SPIR-V 1.0 Table 1: First Words of Physical Layout
+enum HeaderIndex
+{
+    kHeaderIndexMagic        = 0,
+    kHeaderIndexVersion      = 1,
+    kHeaderIndexGenerator    = 2,
+    kHeaderIndexIndexBound   = 3,
+    kHeaderIndexSchema       = 4,
+    kHeaderIndexInstructions = 5,
+};
+
+// Returns whether SPIR-V is valid.  Useful for ASSERTs.  Automatically generates a warning if
+// SPIR-V is not valid.
+bool Validate(const Blob &blob);
+void Print(const Blob &blob);
+
+}  // namespace spirv
+}  // namespace angle
+
+#endif  // COMMON_SPIRV_TYPES_H_
diff --git a/gfx/angle/checkout/src/common/string_utils.cpp b/gfx/angle/checkout/src/common/string_utils.cpp
new file mode 100644
index 0000000000..192d82917c
--- /dev/null
+++ b/gfx/angle/checkout/src/common/string_utils.cpp
@@ -0,0 +1,357 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// string_utils:
+//   String helper functions.
+//
+
+#include "common/string_utils.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <algorithm>
+#include <cctype>
+#include <fstream>
+#include <sstream>
+
+#include "common/platform.h"
+#include "common/system_utils.h"
+
+namespace
+{
+
+bool EndsWithSuffix(const char *str,
+                    const size_t strLen,
+                    const char *suffix,
+                    const size_t suffixLen)
+{
+    return suffixLen <= strLen && strncmp(str + strLen - suffixLen, suffix, suffixLen) == 0;
+}
+
+}  // anonymous namespace
+
+namespace angle
+{
+
+const char kWhitespaceASCII[] = " \f\n\r\t\v";
+
+std::vector<std::string> SplitString(const std::string &input,
+                                     const std::string &delimiters,
+                                     WhitespaceHandling whitespace,
+                                     SplitResult resultType)
+{
+    std::vector<std::string> result;
+    if (input.empty())
+    {
+        return result;
+    }
+
+    std::string::size_type start = 0;
+    while (start != std::string::npos)
+    {
+        auto end = input.find_first_of(delimiters, start);
+
+        std::string piece;
+        if (end == std::string::npos)
+        {
+            piece = input.substr(start);
+            start = std::string::npos;
+        }
+        else
+        {
+            piece = input.substr(start, end - start);
+            start = end + 1;
+        }
+
+        if (whitespace == TRIM_WHITESPACE)
+        {
+            piece = TrimString(piece, kWhitespaceASCII);
+        }
+
+        if (resultType == SPLIT_WANT_ALL || !piece.empty())
+        {
+            result.push_back(std::move(piece));
+        }
+    }
+
+    return result;
+}
+
+void SplitStringAlongWhitespace(const std::string &input, std::vector<std::string> *tokensOut)
+{
+
+    std::istringstream stream(input);
+    std::string line;
+
+    while (std::getline(stream, line))
+    {
+        size_t prev = 0, pos;
+        while ((pos = line.find_first_of(kWhitespaceASCII, prev)) != std::string::npos)
+        {
+            if (pos > prev)
+                tokensOut->push_back(line.substr(prev, pos - prev));
+            prev = pos + 1;
+        }
+        if (prev < line.length())
+            tokensOut->push_back(line.substr(prev, std::string::npos));
+    }
+}
+
+std::string TrimString(const std::string &input, const std::string &trimChars)
+{
+    auto begin = input.find_first_not_of(trimChars);
+    if (begin == std::string::npos)
+    {
+        return "";
+    }
+
+    std::string::size_type end = input.find_last_not_of(trimChars);
+    if (end == std::string::npos)
+    {
+        return input.substr(begin);
+    }
+
+    return input.substr(begin, end - begin + 1);
+}
+
+std::string GetPrefix(const std::string &input, size_t offset, const char *delimiter)
+{
+    size_t match = input.find(delimiter, offset);
+    if (match == std::string::npos)
+    {
+        return input.substr(offset);
+    }
+    return input.substr(offset, match - offset);
+}
+
+std::string GetPrefix(const std::string &input, size_t offset, char delimiter)
+{
+    size_t match = input.find(delimiter, offset);
+    if (match == std::string::npos)
+    {
+        return input.substr(offset);
+    }
+    return input.substr(offset, match - offset);
+}
+
+bool HexStringToUInt(const std::string &input, unsigned int *uintOut)
+{
+    unsigned int offset = 0;
+
+    if (input.size() >= 2 && input[0] == '0' && input[1] == 'x')
+    {
+        offset = 2u;
+    }
+
+    // Simple validity check
+    if (input.find_first_not_of("0123456789ABCDEFabcdef", offset) != std::string::npos)
+    {
+        return false;
+    }
+
+    std::stringstream inStream(input);
+    inStream >> std::hex >> *uintOut;
+    return !inStream.fail();
+}
+
+bool ReadFileToString(const std::string &path, std::string *stringOut)
+{
+    std::ifstream inFile(path.c_str());
+    if (inFile.fail())
+    {
+        return false;
+    }
+
+    inFile.seekg(0, std::ios::end);
+    stringOut->reserve(static_cast<std::string::size_type>(inFile.tellg()));
+    inFile.seekg(0, std::ios::beg);
+
+    stringOut->assign(std::istreambuf_iterator<char>(inFile), std::istreambuf_iterator<char>());
+    return !inFile.fail();
+}
+
+bool BeginsWith(const std::string &str, const std::string &prefix)
+{
+    return strncmp(str.c_str(), prefix.c_str(), prefix.length()) == 0;
+}
+
+bool BeginsWith(const std::string &str, const char *prefix)
+{
+    return strncmp(str.c_str(), prefix, strlen(prefix)) == 0;
+}
+
+bool BeginsWith(const char *str, const char *prefix)
+{
+    return strncmp(str, prefix, strlen(prefix)) == 0;
+}
+
+bool BeginsWith(const std::string &str, const std::string &prefix, const size_t prefixLength)
+{
+    return strncmp(str.c_str(), prefix.c_str(), prefixLength) == 0;
+}
+
+bool EndsWith(const std::string &str, const std::string &suffix)
+{
+    return EndsWithSuffix(str.c_str(), str.length(), suffix.c_str(), suffix.length());
+}
+
+bool EndsWith(const std::string &str, const char *suffix)
+{
+    return EndsWithSuffix(str.c_str(), str.length(), suffix, strlen(suffix));
+}
+
+bool EndsWith(const char *str, const char *suffix)
+{
+    return EndsWithSuffix(str, strlen(str), suffix, strlen(suffix));
+}
+
+bool ContainsToken(const std::string &tokenStr, char delimiter, const std::string &token)
+{
+    if (token.empty())
+    {
+        return false;
+    }
+    // Compare token with all sub-strings terminated by delimiter or end of string
+    std::string::size_type start = 0u;
+    do
+    {
+        std::string::size_type end = tokenStr.find(delimiter, start);
+        if (end == std::string::npos)
+        {
+            end = tokenStr.length();
+        }
+        const std::string::size_type length = end - start;
+        if (length == token.length() && tokenStr.compare(start, length, token) == 0)
+        {
+            return true;
+        }
+        start = end + 1u;
+    } while (start < tokenStr.size());
+    return false;
+}
+
+void ToLower(std::string *str)
+{
+    for (char &ch : *str)
+    {
+        ch = static_cast<char>(::tolower(ch));
+    }
+}
+
+void ToUpper(std::string *str)
+{
+    for (char &ch : *str)
+    {
+        ch = static_cast<char>(::toupper(ch));
+    }
+}
+
+bool ReplaceSubstring(std::string *str,
+                      const std::string &substring,
+                      const std::string &replacement)
+{
+    size_t replacePos = str->find(substring);
+    if (replacePos == std::string::npos)
+    {
+        return false;
+    }
+    str->replace(replacePos, substring.size(), replacement);
+    return true;
+}
+
+int ReplaceAllSubstrings(std::string *str,
+                         const std::string &substring,
+                         const std::string &replacement)
+{
+    int count = 0;
+    while (ReplaceSubstring(str, substring, replacement))
+    {
+        count++;
+    }
+    return count;
+}
+
+std::string ToCamelCase(const std::string &str)
+{
+    std::string result;
+
+    bool lastWasUnderscore = false;
+    for (char c : str)
+    {
+        if (c == '_')
+        {
+            lastWasUnderscore = true;
+            continue;
+        }
+
+        if (lastWasUnderscore)
+        {
+            c                 = static_cast<char>(std::toupper(c));
+            lastWasUnderscore = false;
+        }
+        result += c;
+    }
+
+    return result;
+}
+
+std::vector<std::string> GetStringsFromEnvironmentVarOrAndroidProperty(const char *varName,
+                                                                       const char *propertyName,
+                                                                       const char *separator)
+{
+    std::string environment = GetEnvironmentVarOrAndroidProperty(varName, propertyName);
+    return SplitString(environment, separator, TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
+}
+
+std::vector<std::string> GetCachedStringsFromEnvironmentVarOrAndroidProperty(
+    const char *varName,
+    const char *propertyName,
+    const char *separator)
+{
+    std::string environment = GetEnvironmentVarOrAndroidProperty(varName, propertyName);
+    return SplitString(environment, separator, TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
+}
+
+// glob can have * as wildcard
+bool NamesMatchWithWildcard(const char *glob, const char *name)
+{
+    // Find the first * in glob.
+    const char *firstWildcard = strchr(glob, '*');
+
+    // If there are no wildcards, match the strings precisely.
+    if (firstWildcard == nullptr)
+    {
+        return strcmp(glob, name) == 0;
+    }
+
+    // Otherwise, match up to the wildcard first.
+    size_t preWildcardLen = firstWildcard - glob;
+    if (strncmp(glob, name, preWildcardLen) != 0)
+    {
+        return false;
+    }
+
+    const char *postWildcardRef = glob + preWildcardLen + 1;
+
+    // As a small optimization, if the wildcard is the last character in glob, accept the match
+    // already.
+    if (postWildcardRef[0] == '\0')
+    {
+        return true;
+    }
+
+    // Try to match the wildcard with a number of characters.
+    for (size_t matchSize = 0; name[matchSize] != '\0'; ++matchSize)
+    {
+        if (NamesMatchWithWildcard(postWildcardRef, name + matchSize))
+        {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/string_utils.h b/gfx/angle/checkout/src/common/string_utils.h
new file mode 100644
index 0000000000..7be7efe983
--- /dev/null
+++ b/gfx/angle/checkout/src/common/string_utils.h
@@ -0,0 +1,125 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// string_utils:
+//   String helper functions.
+//
+
+#ifndef LIBANGLE_STRING_UTILS_H_
+#define LIBANGLE_STRING_UTILS_H_
+
+#include <string>
+#include <vector>
+
+#include "common/Optional.h"
+
+namespace angle
+{
+
+extern const char kWhitespaceASCII[];
+
+enum WhitespaceHandling
+{
+    KEEP_WHITESPACE,
+    TRIM_WHITESPACE,
+};
+
+enum SplitResult
+{
+    SPLIT_WANT_ALL,
+    SPLIT_WANT_NONEMPTY,
+};
+
+std::vector<std::string> SplitString(const std::string &input,
+                                     const std::string &delimiters,
+                                     WhitespaceHandling whitespace,
+                                     SplitResult resultType);
+
+void SplitStringAlongWhitespace(const std::string &input, std::vector<std::string> *tokensOut);
+
+std::string TrimString(const std::string &input, const std::string &trimChars);
+
+// Return the substring starting at offset and up to the first occurance of the |delimeter|.
+std::string GetPrefix(const std::string &input, size_t offset, const char *delimiter);
+std::string GetPrefix(const std::string &input, size_t offset, char delimiter);
+
+bool HexStringToUInt(const std::string &input, unsigned int *uintOut);
+
+bool ReadFileToString(const std::string &path, std::string *stringOut);
+
+// Check if the string str begins with the given prefix.
+// The comparison is case sensitive.
+bool BeginsWith(const std::string &str, const std::string &prefix);
+
+// Check if the string str begins with the given prefix.
+// Prefix may not be NULL and needs to be NULL terminated.
+// The comparison is case sensitive.
+bool BeginsWith(const std::string &str, const char *prefix);
+
+// Check if the string str begins with the given prefix.
+// str and prefix may not be NULL and need to be NULL terminated.
+// The comparison is case sensitive.
+bool BeginsWith(const char *str, const char *prefix);
+
+// Check if the string str begins with the first prefixLength characters of the given prefix.
+// The length of the prefix string should be greater than or equal to prefixLength.
+// The comparison is case sensitive.
+bool BeginsWith(const std::string &str, const std::string &prefix, const size_t prefixLength);
+
+// Check if the string str ends with the given suffix.
+// The comparison is case sensitive.
+bool EndsWith(const std::string &str, const std::string &suffix);
+
+// Check if the string str ends with the given suffix.
+// Suffix may not be NULL and needs to be NULL terminated.
+// The comparison is case sensitive.
+bool EndsWith(const std::string &str, const char *suffix);
+
+// Check if the string str ends with the given suffix.
+// str and suffix may not be NULL and need to be NULL terminated.
+// The comparison is case sensitive.
+bool EndsWith(const char *str, const char *suffix);
+
+// Check if the given token string contains the given token.
+// The tokens are separated by the given delimiter.
+// The comparison is case sensitive.
+bool ContainsToken(const std::string &tokenStr, char delimiter, const std::string &token);
+
+// Convert to lower-case.
+void ToLower(std::string *str);
+
+// Convert to upper-case.
+void ToUpper(std::string *str);
+
+// Replaces the substring 'substring' in 'str' with 'replacement'. Returns true if successful.
+bool ReplaceSubstring(std::string *str,
+                      const std::string &substring,
+                      const std::string &replacement);
+
+// Replaces all substrings 'substring' in 'str' with 'replacement'. Returns count of replacements.
+int ReplaceAllSubstrings(std::string *str,
+                         const std::string &substring,
+                         const std::string &replacement);
+
+// Takes a snake_case string and turns it into camelCase.
+std::string ToCamelCase(const std::string &str);
+
+// Split up a string parsed from an environment variable.
+std::vector<std::string> GetStringsFromEnvironmentVarOrAndroidProperty(const char *varName,
+                                                                       const char *propertyName,
+                                                                       const char *separator);
+
+// Split up a string parsed from environment variable or via Android property, use cached result if
+// available.
+std::vector<std::string> GetCachedStringsFromEnvironmentVarOrAndroidProperty(
+    const char *varName,
+    const char *propertyName,
+    const char *separator);
+
+// glob can have * as wildcard
+bool NamesMatchWithWildcard(const char *glob, const char *name);
+}  // namespace angle
+
+#endif  // LIBANGLE_STRING_UTILS_H_
diff --git a/gfx/angle/checkout/src/common/system_utils.cpp b/gfx/angle/checkout/src/common/system_utils.cpp
new file mode 100644
index 0000000000..89b632bc17
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils.cpp
@@ -0,0 +1,267 @@
+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// system_utils.cpp: Implementation of common functions
+
+#include "common/system_utils.h"
+#include "common/debug.h"
+
+#include <stdlib.h>
+#include <atomic>
+
+#if defined(ANGLE_PLATFORM_ANDROID)
+#    include <sys/system_properties.h>
+#endif
+
+#if defined(ANGLE_PLATFORM_APPLE)
+#    include <dispatch/dispatch.h>
+#    include <pthread.h>
+#endif
+
+namespace angle
+{
+std::string GetExecutableName()
+{
+#if defined(ANGLE_PLATFORM_ANDROID) && __ANDROID_API__ >= 21
+    // Support for "getprogname" function in bionic was introduced in L (API level 21)
+    const char *executableName = getprogname();
+    return (executableName) ? std::string(executableName) : "ANGLE";
+#else
+    std::string executableName = GetExecutablePath();
+    size_t lastPathSepLoc      = executableName.find_last_of(GetPathSeparator());
+    return (lastPathSepLoc > 0 ? executableName.substr(lastPathSepLoc + 1, executableName.length())
+                               : "ANGLE");
+#endif  // ANGLE_PLATFORM_ANDROID
+}
+
+// On Android return value cached in the process environment, if none, call
+// GetEnvironmentVarOrUnCachedAndroidProperty if not in environment.
+std::string GetEnvironmentVarOrAndroidProperty(const char *variableName, const char *propertyName)
+{
+#if defined(ANGLE_PLATFORM_ANDROID) && __ANDROID_API__ >= 21
+    // Can't use GetEnvironmentVar here because that won't allow us to distinguish between the
+    // environment being set to an empty string vs. not set at all.
+    const char *variableValue = getenv(variableName);
+    if (variableValue != nullptr)
+    {
+        std::string value(variableValue);
+        return value;
+    }
+#endif
+    return GetEnvironmentVarOrUnCachedAndroidProperty(variableName, propertyName);
+}
+
+// On Android call out to 'getprop' on a shell to get an Android property.  On desktop, return
+// the value of the environment variable.
+std::string GetEnvironmentVarOrUnCachedAndroidProperty(const char *variableName,
+                                                       const char *propertyName)
+{
+#if defined(ANGLE_PLATFORM_ANDROID) && __ANDROID_API__ >= 26
+    std::string propertyValue;
+
+    const prop_info *propertyInfo = __system_property_find(propertyName);
+    if (propertyInfo != nullptr)
+    {
+        __system_property_read_callback(
+            propertyInfo,
+            [](void *cookie, const char *, const char *value, unsigned) {
+                auto propertyValue = reinterpret_cast<std::string *>(cookie);
+                *propertyValue     = value;
+            },
+            &propertyValue);
+    }
+
+    return propertyValue;
+#else
+    // Return the environment variable's value.
+    return GetEnvironmentVar(variableName);
+#endif  // ANGLE_PLATFORM_ANDROID
+}
+
+// Look up a property and add it to the application's environment.
+// Adding to the env is a performance optimization, as getting properties is expensive.
+// This should only be used in non-Release paths, i.e. when using FrameCapture or DebugUtils.
+// It can cause race conditions in stress testing. See http://anglebug.com/6822
+std::string GetAndSetEnvironmentVarOrUnCachedAndroidProperty(const char *variableName,
+                                                             const char *propertyName)
+{
+    std::string value = GetEnvironmentVarOrUnCachedAndroidProperty(variableName, propertyName);
+
+#if defined(ANGLE_PLATFORM_ANDROID)
+    if (!value.empty())
+    {
+        // Set the environment variable with the value to improve future lookups (avoids
+        SetEnvironmentVar(variableName, value.c_str());
+    }
+#endif
+
+    return value;
+}
+
+bool GetBoolEnvironmentVar(const char *variableName)
+{
+    std::string envVarString = GetEnvironmentVar(variableName);
+    return (!envVarString.empty() && envVarString == "1");
+}
+
+bool PrependPathToEnvironmentVar(const char *variableName, const char *path)
+{
+    std::string oldValue = GetEnvironmentVar(variableName);
+    const char *newValue = nullptr;
+    std::string buf;
+    if (oldValue.empty())
+    {
+        newValue = path;
+    }
+    else
+    {
+        buf = path;
+        buf += GetPathSeparatorForEnvironmentVar();
+        buf += oldValue;
+        newValue = buf.c_str();
+    }
+    return SetEnvironmentVar(variableName, newValue);
+}
+
+bool IsFullPath(std::string dirName)
+{
+    if (dirName.find(GetRootDirectory()) == 0)
+    {
+        return true;
+    }
+    return false;
+}
+
+std::string ConcatenatePath(std::string first, std::string second)
+{
+    if (first.empty())
+    {
+        return second;
+    }
+    if (second.empty())
+    {
+        return first;
+    }
+    if (IsFullPath(second))
+    {
+        return second;
+    }
+    bool firstRedundantPathSeparator = first.find_last_of(GetPathSeparator()) == first.length() - 1;
+    bool secondRedundantPathSeparator = second.find(GetPathSeparator()) == 0;
+    if (firstRedundantPathSeparator && secondRedundantPathSeparator)
+    {
+        return first + second.substr(1);
+    }
+    else if (firstRedundantPathSeparator || secondRedundantPathSeparator)
+    {
+        return first + second;
+    }
+    return first + GetPathSeparator() + second;
+}
+
+Optional<std::string> CreateTemporaryFile()
+{
+    const Optional<std::string> tempDir = GetTempDirectory();
+    if (!tempDir.valid())
+        return Optional<std::string>::Invalid();
+
+    return CreateTemporaryFileInDirectory(tempDir.value());
+}
+
+PageFaultHandler::PageFaultHandler(PageFaultCallback callback) : mCallback(callback) {}
+PageFaultHandler::~PageFaultHandler() {}
+
+Library *OpenSharedLibrary(const char *libraryName, SearchType searchType)
+{
+    void *libraryHandle = OpenSystemLibraryAndGetError(libraryName, searchType, nullptr);
+    return new Library(libraryHandle);
+}
+
+Library *OpenSharedLibraryWithExtension(const char *libraryName, SearchType searchType)
+{
+    void *libraryHandle =
+        OpenSystemLibraryWithExtensionAndGetError(libraryName, searchType, nullptr);
+    return new Library(libraryHandle);
+}
+
+Library *OpenSharedLibraryAndGetError(const char *libraryName,
+                                      SearchType searchType,
+                                      std::string *errorOut)
+{
+    void *libraryHandle = OpenSystemLibraryAndGetError(libraryName, searchType, errorOut);
+    return new Library(libraryHandle);
+}
+
+Library *OpenSharedLibraryWithExtensionAndGetError(const char *libraryName,
+                                                   SearchType searchType,
+                                                   std::string *errorOut)
+{
+    void *libraryHandle =
+        OpenSystemLibraryWithExtensionAndGetError(libraryName, searchType, errorOut);
+    return new Library(libraryHandle);
+}
+
+void *OpenSystemLibrary(const char *libraryName, SearchType searchType)
+{
+    return OpenSystemLibraryAndGetError(libraryName, searchType, nullptr);
+}
+
+void *OpenSystemLibraryWithExtension(const char *libraryName, SearchType searchType)
+{
+    return OpenSystemLibraryWithExtensionAndGetError(libraryName, searchType, nullptr);
+}
+
+void *OpenSystemLibraryAndGetError(const char *libraryName,
+                                   SearchType searchType,
+                                   std::string *errorOut)
+{
+    std::string libraryWithExtension = std::string(libraryName) + "." + GetSharedLibraryExtension();
+#if ANGLE_PLATFORM_IOS
+    // On iOS, libraryWithExtension is a directory in which the library resides.
+    // The actual library name doesn't have an extension at all.
+    // E.g. "libEGL.framework/libEGL"
+    libraryWithExtension = libraryWithExtension + "/" + libraryName;
+#endif
+    return OpenSystemLibraryWithExtensionAndGetError(libraryWithExtension.c_str(), searchType,
+                                                     errorOut);
+}
+
+std::string StripFilenameFromPath(const std::string &path)
+{
+    size_t lastPathSepLoc = path.find_last_of("\\/");
+    return (lastPathSepLoc != std::string::npos) ? path.substr(0, lastPathSepLoc) : "";
+}
+
+static std::atomic<uint64_t> globalThreadSerial(1);
+
+#if defined(ANGLE_PLATFORM_APPLE)
+// https://anglebug.com/6479, similar to egl::GetCurrentThread() in libGLESv2/global_state.cpp
+uint64_t GetCurrentThreadUniqueId()
+{
+    static pthread_key_t tlsIndex;
+    static dispatch_once_t once;
+    dispatch_once(&once, ^{
+      ASSERT(pthread_key_create(&tlsIndex, nullptr) == 0);
+    });
+
+    void *tlsValue = pthread_getspecific(tlsIndex);
+    if (tlsValue == nullptr)
+    {
+        uint64_t threadId = globalThreadSerial++;
+        ASSERT(pthread_setspecific(tlsIndex, reinterpret_cast<void *>(threadId)) == 0);
+        return threadId;
+    }
+    return reinterpret_cast<uint64_t>(tlsValue);
+}
+#else
+uint64_t GetCurrentThreadUniqueId()
+{
+    thread_local uint64_t threadId(globalThreadSerial++);
+    return threadId;
+}
+#endif
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/system_utils.h b/gfx/angle/checkout/src/common/system_utils.h
new file mode 100644
index 0000000000..d9e435afaa
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils.h
@@ -0,0 +1,224 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// system_utils.h: declaration of OS-specific utility functions
+
+#ifndef COMMON_SYSTEM_UTILS_H_
+#define COMMON_SYSTEM_UTILS_H_
+
+#include "common/Optional.h"
+#include "common/angleutils.h"
+
+#include <functional>
+#include <string>
+#include <string_view>
+
+namespace angle
+{
+std::string GetExecutableName();
+std::string GetExecutablePath();
+std::string GetExecutableDirectory();
+std::string GetModuleDirectory();
+const char *GetSharedLibraryExtension();
+const char *GetExecutableExtension();
+char GetPathSeparator();
+Optional<std::string> GetCWD();
+bool SetCWD(const char *dirName);
+bool SetEnvironmentVar(const char *variableName, const char *value);
+bool UnsetEnvironmentVar(const char *variableName);
+bool GetBoolEnvironmentVar(const char *variableName);
+std::string GetEnvironmentVar(const char *variableName);
+std::string GetEnvironmentVarOrUnCachedAndroidProperty(const char *variableName,
+                                                       const char *propertyName);
+std::string GetAndSetEnvironmentVarOrUnCachedAndroidProperty(const char *variableName,
+                                                             const char *propertyName);
+std::string GetEnvironmentVarOrAndroidProperty(const char *variableName, const char *propertyName);
+const char *GetPathSeparatorForEnvironmentVar();
+bool PrependPathToEnvironmentVar(const char *variableName, const char *path);
+bool IsDirectory(const char *filename);
+bool IsFullPath(std::string dirName);
+std::string GetRootDirectory();
+std::string ConcatenatePath(std::string first, std::string second);
+
+Optional<std::string> GetTempDirectory();
+Optional<std::string> CreateTemporaryFileInDirectory(const std::string &directory);
+Optional<std::string> CreateTemporaryFile();
+
+// Get absolute time in seconds.  Use this function to get an absolute time with an unknown origin.
+double GetCurrentSystemTime();
+// Get CPU time for current process in seconds.
+double GetCurrentProcessCpuTime();
+
+// Unique thread id (std::this_thread::get_id() gets recycled!)
+uint64_t GetCurrentThreadUniqueId();
+
+// Run an application and get the output.  Gets a nullptr-terminated set of args to execute the
+// application with, and returns the stdout and stderr outputs as well as the exit code.
+//
+// Pass nullptr for stdoutOut/stderrOut if you don't need to capture. exitCodeOut is required.
+//
+// Returns false if it fails to actually execute the application.
+bool RunApp(const std::vector<const char *> &args,
+            std::string *stdoutOut,
+            std::string *stderrOut,
+            int *exitCodeOut);
+
+// Use SYSTEM_DIR to bypass loading ANGLE libraries with the same name as system DLLS
+// (e.g. opengl32.dll)
+enum class SearchType
+{
+    // Try to find the library in the same directory as the current module
+    ModuleDir,
+    // Load the library from the system directories
+    SystemDir,
+    // Get a reference to an already loaded shared library.
+    AlreadyLoaded,
+};
+
+void *OpenSystemLibrary(const char *libraryName, SearchType searchType);
+void *OpenSystemLibraryWithExtension(const char *libraryName, SearchType searchType);
+void *OpenSystemLibraryAndGetError(const char *libraryName,
+                                   SearchType searchType,
+                                   std::string *errorOut);
+void *OpenSystemLibraryWithExtensionAndGetError(const char *libraryName,
+                                                SearchType searchType,
+                                                std::string *errorOut);
+
+void *GetLibrarySymbol(void *libraryHandle, const char *symbolName);
+std::string GetLibraryPath(void *libraryHandle);
+void CloseSystemLibrary(void *libraryHandle);
+
+class Library : angle::NonCopyable
+{
+  public:
+    Library() {}
+    Library(void *libraryHandle) : mLibraryHandle(libraryHandle) {}
+    ~Library() { close(); }
+
+    [[nodiscard]] bool open(const char *libraryName, SearchType searchType)
+    {
+        close();
+        mLibraryHandle = OpenSystemLibrary(libraryName, searchType);
+        return mLibraryHandle != nullptr;
+    }
+
+    [[nodiscard]] bool openWithExtension(const char *libraryName, SearchType searchType)
+    {
+        close();
+        mLibraryHandle = OpenSystemLibraryWithExtension(libraryName, searchType);
+        return mLibraryHandle != nullptr;
+    }
+
+    [[nodiscard]] bool openAndGetError(const char *libraryName,
+                                       SearchType searchType,
+                                       std::string *errorOut)
+    {
+        close();
+        mLibraryHandle = OpenSystemLibraryAndGetError(libraryName, searchType, errorOut);
+        return mLibraryHandle != nullptr;
+    }
+
+    [[nodiscard]] bool openWithExtensionAndGetError(const char *libraryName,
+                                                    SearchType searchType,
+                                                    std::string *errorOut)
+    {
+        close();
+        mLibraryHandle =
+            OpenSystemLibraryWithExtensionAndGetError(libraryName, searchType, errorOut);
+        return mLibraryHandle != nullptr;
+    }
+
+    void close()
+    {
+        if (mLibraryHandle)
+        {
+            CloseSystemLibrary(mLibraryHandle);
+            mLibraryHandle = nullptr;
+        }
+    }
+
+    void *getSymbol(const char *symbolName) { return GetLibrarySymbol(mLibraryHandle, symbolName); }
+
+    void *getNative() const { return mLibraryHandle; }
+
+    std::string getPath() const { return GetLibraryPath(mLibraryHandle); }
+
+    template <typename FuncT>
+    void getAs(const char *symbolName, FuncT *funcOut)
+    {
+        *funcOut = reinterpret_cast<FuncT>(getSymbol(symbolName));
+    }
+
+  private:
+    void *mLibraryHandle = nullptr;
+};
+
+Library *OpenSharedLibrary(const char *libraryName, SearchType searchType);
+Library *OpenSharedLibraryWithExtension(const char *libraryName, SearchType searchType);
+Library *OpenSharedLibraryAndGetError(const char *libraryName,
+                                      SearchType searchType,
+                                      std::string *errorOut);
+Library *OpenSharedLibraryWithExtensionAndGetError(const char *libraryName,
+                                                   SearchType searchType,
+                                                   std::string *errorOut);
+
+// Returns true if the process is currently being debugged.
+bool IsDebuggerAttached();
+
+// Calls system APIs to break into the debugger.
+void BreakDebugger();
+
+uint64_t GetProcessMemoryUsageKB();
+
+bool ProtectMemory(uintptr_t start, size_t size);
+bool UnprotectMemory(uintptr_t start, size_t size);
+
+size_t GetPageSize();
+
+// Return type of the PageFaultCallback
+enum class PageFaultHandlerRangeType
+{
+    // The memory address was known by the page fault handler
+    InRange,
+    // The memory address was not in the page fault handler's range
+    // and the signal will be forwarded to the default page handler.
+    OutOfRange,
+};
+
+using PageFaultCallback = std::function<PageFaultHandlerRangeType(uintptr_t)>;
+
+class PageFaultHandler : angle::NonCopyable
+{
+  public:
+    PageFaultHandler(PageFaultCallback callback);
+    virtual ~PageFaultHandler();
+
+    // Registers OS level page fault handler for memory protection signals
+    // and enables reception on PageFaultCallback
+    virtual bool enable() = 0;
+
+    // Unregisters OS level page fault handler and deactivates PageFaultCallback
+    virtual bool disable() = 0;
+
+  protected:
+    PageFaultCallback mCallback;
+};
+
+// Creates single instance page fault handler
+PageFaultHandler *CreatePageFaultHandler(PageFaultCallback callback);
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+// Convert an UTF-16 wstring to an UTF-8 string.
+std::string Narrow(const std::wstring_view &utf16);
+
+// Convert an UTF-8 string to an UTF-16 wstring.
+std::wstring Widen(const std::string_view &utf8);
+#endif
+
+std::string StripFilenameFromPath(const std::string &path);
+}  // namespace angle
+
+#endif  // COMMON_SYSTEM_UTILS_H_
diff --git a/gfx/angle/checkout/src/common/system_utils_apple.cpp b/gfx/angle/checkout/src/common/system_utils_apple.cpp
new file mode 100644
index 0000000000..532714248c
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils_apple.cpp
@@ -0,0 +1,59 @@
+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// system_utils_apple.cpp: Implementation of OS-specific functions for Apple platforms
+
+#include "system_utils.h"
+
+#include <unistd.h>
+
+#include <CoreServices/CoreServices.h>
+#include <mach-o/dyld.h>
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+#include <cstdlib>
+#include <vector>
+
+#include <array>
+
+namespace angle
+{
+std::string GetExecutablePath()
+{
+    std::string result;
+
+    uint32_t size = 0;
+    _NSGetExecutablePath(nullptr, &size);
+
+    std::vector<char> buffer;
+    buffer.resize(size + 1);
+
+    _NSGetExecutablePath(buffer.data(), &size);
+    buffer[size] = '\0';
+
+    if (!strrchr(buffer.data(), '/'))
+    {
+        return "";
+    }
+    return buffer.data();
+}
+
+std::string GetExecutableDirectory()
+{
+    std::string executablePath = GetExecutablePath();
+    size_t lastPathSepLoc      = executablePath.find_last_of("/");
+    return (lastPathSepLoc != std::string::npos) ? executablePath.substr(0, lastPathSepLoc) : "";
+}
+
+double GetCurrentSystemTime()
+{
+    mach_timebase_info_data_t timebaseInfo;
+    mach_timebase_info(&timebaseInfo);
+
+    double secondCoeff = timebaseInfo.numer * 1e-9 / timebaseInfo.denom;
+    return secondCoeff * mach_absolute_time();
+}
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/system_utils_linux.cpp b/gfx/angle/checkout/src/common/system_utils_linux.cpp
new file mode 100644
index 0000000000..da0ed86028
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils_linux.cpp
@@ -0,0 +1,55 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// system_utils_linux.cpp: Implementation of OS-specific functions for Linux
+
+#include "system_utils.h"
+
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <array>
+
+namespace angle
+{
+std::string GetExecutablePath()
+{
+    // We cannot use lstat to get the size of /proc/self/exe as it always returns 0
+    // so we just use a big buffer and hope the path fits in it.
+    char path[4096];
+
+    ssize_t result = readlink("/proc/self/exe", path, sizeof(path) - 1);
+    if (result < 0 || static_cast<size_t>(result) >= sizeof(path) - 1)
+    {
+        return "";
+    }
+
+    path[result] = '\0';
+    return path;
+}
+
+std::string GetExecutableDirectory()
+{
+    std::string executablePath = GetExecutablePath();
+    size_t lastPathSepLoc      = executablePath.find_last_of("/");
+    return (lastPathSepLoc != std::string::npos) ? executablePath.substr(0, lastPathSepLoc) : "";
+}
+
+const char *GetSharedLibraryExtension()
+{
+    return "so";
+}
+
+double GetCurrentSystemTime()
+{
+    struct timespec currentTime;
+    clock_gettime(CLOCK_MONOTONIC, &currentTime);
+    return currentTime.tv_sec + currentTime.tv_nsec * 1e-9;
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/system_utils_mac.cpp b/gfx/angle/checkout/src/common/system_utils_mac.cpp
new file mode 100644
index 0000000000..2c48a7eb04
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils_mac.cpp
@@ -0,0 +1,28 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// system_utils_osx.cpp: Implementation of OS-specific functions for OSX
+
+#include "system_utils.h"
+
+#include <unistd.h>
+
+#include <CoreServices/CoreServices.h>
+#include <mach-o/dyld.h>
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+#include <cstdlib>
+#include <vector>
+
+#include <array>
+
+namespace angle
+{
+const char *GetSharedLibraryExtension()
+{
+    return "dylib";
+}
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/system_utils_posix.cpp b/gfx/angle/checkout/src/common/system_utils_posix.cpp
new file mode 100644
index 0000000000..ab0faee0bc
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils_posix.cpp
@@ -0,0 +1,470 @@
+//
+// Copyright 2018 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// system_utils_posix.cpp: Implementation of POSIX OS-specific functions.
+
+#include "common/debug.h"
+#include "system_utils.h"
+
+#include <array>
+#include <iostream>
+
+#include <dlfcn.h>
+#include <grp.h>
+#include <inttypes.h>
+#include <pwd.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "common/string_utils.h"
+
+#ifdef ANGLE_PLATFORM_FUCHSIA
+#    include <zircon/process.h>
+#    include <zircon/syscalls.h>
+#else
+#    include <sys/resource.h>
+#endif
+
+namespace angle
+{
+
+namespace
+{
+std::string GetModulePath(void *moduleOrSymbol)
+{
+    Dl_info dlInfo;
+    if (dladdr(moduleOrSymbol, &dlInfo) == 0)
+    {
+        return "";
+    }
+
+    return dlInfo.dli_fname;
+}
+
+void *OpenPosixLibrary(const std::string &fullPath, int extraFlags, std::string *errorOut)
+{
+    void *module = dlopen(fullPath.c_str(), RTLD_NOW | extraFlags);
+    if (module)
+    {
+        if (errorOut)
+        {
+            *errorOut = fullPath;
+        }
+    }
+    else if (errorOut)
+    {
+        *errorOut = "dlopen(";
+        *errorOut += fullPath;
+        *errorOut += ") failed with error: ";
+        *errorOut += dlerror();
+        struct stat sfile;
+        if (-1 == stat(fullPath.c_str(), &sfile))
+        {
+            *errorOut += ", stat() call failed.";
+        }
+        else
+        {
+            *errorOut += ", stat() info: ";
+            struct passwd *pwuser = getpwuid(sfile.st_uid);
+            if (pwuser)
+            {
+                *errorOut += "owner: ";
+                *errorOut += pwuser->pw_name;
+                *errorOut += ", ";
+            }
+            struct group *grpnam = getgrgid(sfile.st_gid);
+            if (grpnam)
+            {
+                *errorOut += "group: ";
+                *errorOut += grpnam->gr_name;
+                *errorOut += ", ";
+            }
+            *errorOut += "perms: ";
+            *errorOut += std::to_string(sfile.st_mode);
+            *errorOut += ", links: ";
+            *errorOut += std::to_string(sfile.st_nlink);
+            *errorOut += ", size: ";
+            *errorOut += std::to_string(sfile.st_size);
+        }
+    }
+    return module;
+}
+}  // namespace
+
+Optional<std::string> GetCWD()
+{
+    std::array<char, 4096> pathBuf;
+    char *result = getcwd(pathBuf.data(), pathBuf.size());
+    if (result == nullptr)
+    {
+        return Optional<std::string>::Invalid();
+    }
+    return std::string(pathBuf.data());
+}
+
+bool SetCWD(const char *dirName)
+{
+    return (chdir(dirName) == 0);
+}
+
+bool UnsetEnvironmentVar(const char *variableName)
+{
+    return (unsetenv(variableName) == 0);
+}
+
+bool SetEnvironmentVar(const char *variableName, const char *value)
+{
+    return (setenv(variableName, value, 1) == 0);
+}
+
+std::string GetEnvironmentVar(const char *variableName)
+{
+    const char *value = getenv(variableName);
+    return (value == nullptr ? std::string() : std::string(value));
+}
+
+const char *GetPathSeparatorForEnvironmentVar()
+{
+    return ":";
+}
+
+std::string GetModuleDirectoryAndGetError(std::string *errorOut)
+{
+    std::string directory;
+    static int placeholderSymbol = 0;
+    std::string moduleName       = GetModulePath(&placeholderSymbol);
+    if (!moduleName.empty())
+    {
+        directory = moduleName.substr(0, moduleName.find_last_of('/') + 1);
+    }
+
+    // Ensure we return the full path to the module, not the relative path
+    if (!IsFullPath(directory))
+    {
+        if (errorOut)
+        {
+            *errorOut += "Directory: '";
+            *errorOut += directory;
+            *errorOut += "' is not full path";
+        }
+        Optional<std::string> cwd = GetCWD();
+        if (cwd.valid())
+        {
+            directory = ConcatenatePath(cwd.value(), directory);
+            if (errorOut)
+            {
+                *errorOut += ", so it has been modified to: '";
+                *errorOut += directory;
+                *errorOut += "'. ";
+            }
+        }
+        else if (errorOut)
+        {
+            *errorOut += " and getcwd was invalid. ";
+        }
+    }
+    return directory;
+}
+
+std::string GetModuleDirectory()
+{
+    return GetModuleDirectoryAndGetError(nullptr);
+}
+
+void *OpenSystemLibraryWithExtensionAndGetError(const char *libraryName,
+                                                SearchType searchType,
+                                                std::string *errorOut)
+{
+    std::string directory;
+    if (searchType == SearchType::ModuleDir)
+    {
+#if ANGLE_PLATFORM_IOS
+        // On iOS, shared libraries must be loaded from within the app bundle.
+        directory = GetExecutableDirectory() + "/Frameworks/";
+#elif ANGLE_PLATFORM_FUCHSIA
+        // On Fuchsia the dynamic loader always looks up libraries in /pkg/lib
+        // and disallows loading of libraries via absolute paths.
+        directory = "";
+#else
+        directory = GetModuleDirectoryAndGetError(errorOut);
+#endif
+    }
+
+    int extraFlags = 0;
+    if (searchType == SearchType::AlreadyLoaded)
+    {
+        extraFlags = RTLD_NOLOAD;
+    }
+
+    std::string fullPath = directory + libraryName;
+    return OpenPosixLibrary(fullPath, extraFlags, errorOut);
+}
+
+void *GetLibrarySymbol(void *libraryHandle, const char *symbolName)
+{
+    if (!libraryHandle)
+    {
+        return nullptr;
+    }
+
+    return dlsym(libraryHandle, symbolName);
+}
+
+std::string GetLibraryPath(void *libraryHandle)
+{
+    if (!libraryHandle)
+    {
+        return "";
+    }
+
+    return GetModulePath(libraryHandle);
+}
+
+void CloseSystemLibrary(void *libraryHandle)
+{
+    if (libraryHandle)
+    {
+        dlclose(libraryHandle);
+    }
+}
+
+bool IsDirectory(const char *filename)
+{
+    struct stat st;
+    int result = stat(filename, &st);
+    return result == 0 && ((st.st_mode & S_IFDIR) == S_IFDIR);
+}
+
+bool IsDebuggerAttached()
+{
+    // This could have a fuller implementation.
+    // See https://cs.chromium.org/chromium/src/base/debug/debugger_posix.cc
+    return false;
+}
+
+void BreakDebugger()
+{
+    // This could have a fuller implementation.
+    // See https://cs.chromium.org/chromium/src/base/debug/debugger_posix.cc
+    abort();
+}
+
+const char *GetExecutableExtension()
+{
+    return "";
+}
+
+char GetPathSeparator()
+{
+    return '/';
+}
+
+std::string GetRootDirectory()
+{
+    return "/";
+}
+
+Optional<std::string> GetTempDirectory()
+{
+    const char *tmp = getenv("TMPDIR");
+    if (tmp != nullptr)
+    {
+        return std::string(tmp);
+    }
+
+#if defined(ANGLE_PLATFORM_ANDROID)
+    // Not used right now in the ANGLE test runner.
+    // return PathService::Get(DIR_CACHE, path);
+    return Optional<std::string>::Invalid();
+#else
+    return std::string("/tmp");
+#endif
+}
+
+Optional<std::string> CreateTemporaryFileInDirectory(const std::string &directory)
+{
+    std::string tempFileTemplate = directory + "/.angle.XXXXXX";
+
+    char tempFile[1000];
+    strcpy(tempFile, tempFileTemplate.c_str());
+
+    int fd = mkstemp(tempFile);
+    close(fd);
+
+    if (fd != -1)
+    {
+        return std::string(tempFile);
+    }
+
+    return Optional<std::string>::Invalid();
+}
+
+double GetCurrentProcessCpuTime()
+{
+#ifdef ANGLE_PLATFORM_FUCHSIA
+    static zx_handle_t me = zx_process_self();
+    zx_info_task_runtime_t task_runtime;
+    zx_object_get_info(me, ZX_INFO_TASK_RUNTIME, &task_runtime, sizeof(task_runtime), nullptr,
+                       nullptr);
+    return static_cast<double>(task_runtime.cpu_time) * 1e-9;
+#else
+    // We could also have used /proc/stat, but that requires us to read the
+    // filesystem and convert from jiffies. /proc/stat also relies on jiffies
+    // (lower resolution) while getrusage can potentially use a sched_clock()
+    // underneath that has higher resolution.
+    struct rusage usage;
+    getrusage(RUSAGE_SELF, &usage);
+    double userTime = usage.ru_utime.tv_sec + usage.ru_utime.tv_usec * 1e-6;
+    double systemTime = usage.ru_stime.tv_sec + usage.ru_stime.tv_usec * 1e-6;
+    return userTime + systemTime;
+#endif
+}
+
+namespace
+{
+bool SetMemoryProtection(uintptr_t start, size_t size, int protections)
+{
+    int ret = mprotect(reinterpret_cast<void *>(start), size, protections);
+    if (ret < 0)
+    {
+        perror("mprotect failed");
+    }
+    return ret == 0;
+}
+
+class PosixPageFaultHandler : public PageFaultHandler
+{
+  public:
+    PosixPageFaultHandler(PageFaultCallback callback) : PageFaultHandler(callback) {}
+    ~PosixPageFaultHandler() override {}
+
+    bool enable() override;
+    bool disable() override;
+    void handle(int sig, siginfo_t *info, void *unused);
+
+  private:
+    struct sigaction mDefaultBusAction  = {};
+    struct sigaction mDefaultSegvAction = {};
+};
+
+PosixPageFaultHandler *gPosixPageFaultHandler = nullptr;
+void SegfaultHandlerFunction(int sig, siginfo_t *info, void *unused)
+{
+    gPosixPageFaultHandler->handle(sig, info, unused);
+}
+
+void PosixPageFaultHandler::handle(int sig, siginfo_t *info, void *unused)
+{
+    bool found = false;
+    if ((sig == SIGSEGV || sig == SIGBUS) &&
+        (info->si_code == SEGV_ACCERR || info->si_code == SEGV_MAPERR))
+    {
+        found = mCallback(reinterpret_cast<uintptr_t>(info->si_addr)) ==
+                PageFaultHandlerRangeType::InRange;
+    }
+
+    // Fall back to default signal handler
+    if (!found)
+    {
+        if (sig == SIGSEGV)
+        {
+            mDefaultSegvAction.sa_sigaction(sig, info, unused);
+        }
+        else if (sig == SIGBUS)
+        {
+            mDefaultBusAction.sa_sigaction(sig, info, unused);
+        }
+        else
+        {
+            UNREACHABLE();
+        }
+    }
+}
+
+bool PosixPageFaultHandler::disable()
+{
+    return sigaction(SIGSEGV, &mDefaultSegvAction, nullptr) == 0 &&
+           sigaction(SIGBUS, &mDefaultBusAction, nullptr) == 0;
+}
+
+bool PosixPageFaultHandler::enable()
+{
+    struct sigaction sigAction = {};
+    sigAction.sa_flags         = SA_SIGINFO;
+    sigAction.sa_sigaction     = &SegfaultHandlerFunction;
+    sigemptyset(&sigAction.sa_mask);
+
+    // Some POSIX implementations use SIGBUS for mprotect faults
+    return sigaction(SIGSEGV, &sigAction, &mDefaultSegvAction) == 0 &&
+           sigaction(SIGBUS, &sigAction, &mDefaultBusAction) == 0;
+}
+}  // namespace
+
+// Set write protection
+bool ProtectMemory(uintptr_t start, size_t size)
+{
+    return SetMemoryProtection(start, size, PROT_READ);
+}
+
+// Allow reading and writing
+bool UnprotectMemory(uintptr_t start, size_t size)
+{
+    return SetMemoryProtection(start, size, PROT_READ | PROT_WRITE);
+}
+
+size_t GetPageSize()
+{
+    long pageSize = sysconf(_SC_PAGE_SIZE);
+    if (pageSize < 0)
+    {
+        perror("Could not get sysconf page size");
+        return 0;
+    }
+    return static_cast<size_t>(pageSize);
+}
+
+PageFaultHandler *CreatePageFaultHandler(PageFaultCallback callback)
+{
+    gPosixPageFaultHandler = new PosixPageFaultHandler(callback);
+    return gPosixPageFaultHandler;
+}
+
+uint64_t GetProcessMemoryUsageKB()
+{
+    FILE *file = fopen("/proc/self/status", "r");
+
+    if (!file)
+    {
+        return 0;
+    }
+
+    const char *kSearchString           = "VmRSS:";
+    constexpr size_t kMaxLineSize       = 100;
+    std::array<char, kMaxLineSize> line = {};
+
+    uint64_t kb = 0;
+
+    while (fgets(line.data(), line.size(), file) != nullptr)
+    {
+        if (strncmp(line.data(), kSearchString, strlen(kSearchString)) == 0)
+        {
+            std::vector<std::string> strings;
+            SplitStringAlongWhitespace(line.data(), &strings);
+
+            sscanf(strings[1].c_str(), "%" SCNu64, &kb);
+            break;
+        }
+    }
+    fclose(file);
+
+    return kb;
+}
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/system_utils_win.cpp b/gfx/angle/checkout/src/common/system_utils_win.cpp
new file mode 100644
index 0000000000..8770235cd7
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils_win.cpp
@@ -0,0 +1,264 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// system_utils_win.cpp: Implementation of OS-specific functions for Windows
+
+#include "system_utils.h"
+
+#include <stdarg.h>
+#include <windows.h>
+#include <array>
+#include <vector>
+
+namespace angle
+{
+
+namespace
+{
+
+std::string GetPath(HMODULE module)
+{
+    std::array<wchar_t, MAX_PATH> executableFileBuf;
+    DWORD executablePathLen = GetModuleFileNameW(module, executableFileBuf.data(),
+                                                 static_cast<DWORD>(executableFileBuf.size()));
+    return Narrow(executablePathLen > 0 ? executableFileBuf.data() : L"");
+}
+
+std::string GetDirectory(HMODULE module)
+{
+    std::string executablePath = GetPath(module);
+    return StripFilenameFromPath(executablePath);
+}
+
+}  // anonymous namespace
+
+std::string GetExecutablePath()
+{
+    return GetPath(nullptr);
+}
+
+std::string GetExecutableDirectory()
+{
+    return GetDirectory(nullptr);
+}
+
+const char *GetSharedLibraryExtension()
+{
+    return "dll";
+}
+
+Optional<std::string> GetCWD()
+{
+    std::array<wchar_t, MAX_PATH> pathBuf;
+    DWORD result = GetCurrentDirectoryW(static_cast<DWORD>(pathBuf.size()), pathBuf.data());
+    if (result == 0)
+    {
+        return Optional<std::string>::Invalid();
+    }
+    return Narrow(pathBuf.data());
+}
+
+bool SetCWD(const char *dirName)
+{
+    return (SetCurrentDirectoryW(Widen(dirName).c_str()) == TRUE);
+}
+
+const char *GetPathSeparatorForEnvironmentVar()
+{
+    return ";";
+}
+
+double GetCurrentSystemTime()
+{
+    LARGE_INTEGER frequency = {};
+    QueryPerformanceFrequency(&frequency);
+
+    LARGE_INTEGER curTime;
+    QueryPerformanceCounter(&curTime);
+
+    return static_cast<double>(curTime.QuadPart) / frequency.QuadPart;
+}
+
+double GetCurrentProcessCpuTime()
+{
+    FILETIME creationTime = {};
+    FILETIME exitTime     = {};
+    FILETIME kernelTime   = {};
+    FILETIME userTime     = {};
+
+    // Note this will not give accurate results if the current thread is
+    // scheduled for less than the tick rate, which is often 15 ms. In that
+    // case, GetProcessTimes will not return different values, making it
+    // possible to end up with 0 ms for a process that takes 93% of a core
+    // (14/15 ms)!  An alternative is QueryProcessCycleTime but there is no
+    // simple way to convert cycles back to seconds, and on top of that, it's
+    // not supported pre-Windows Vista.
+
+    // Returns 100-ns intervals, so we want to divide by 1e7 to get seconds
+    GetProcessTimes(GetCurrentProcess(), &creationTime, &exitTime, &kernelTime, &userTime);
+
+    ULARGE_INTEGER kernelInt64;
+    kernelInt64.LowPart      = kernelTime.dwLowDateTime;
+    kernelInt64.HighPart     = kernelTime.dwHighDateTime;
+    double systemTimeSeconds = static_cast<double>(kernelInt64.QuadPart) * 1e-7;
+
+    ULARGE_INTEGER userInt64;
+    userInt64.LowPart      = userTime.dwLowDateTime;
+    userInt64.HighPart     = userTime.dwHighDateTime;
+    double userTimeSeconds = static_cast<double>(userInt64.QuadPart) * 1e-7;
+
+    return systemTimeSeconds + userTimeSeconds;
+}
+
+bool IsDirectory(const char *filename)
+{
+    WIN32_FILE_ATTRIBUTE_DATA fileInformation;
+
+    BOOL result =
+        GetFileAttributesExW(Widen(filename).c_str(), GetFileExInfoStandard, &fileInformation);
+    if (result)
+    {
+        DWORD attribs = fileInformation.dwFileAttributes;
+        return (attribs != INVALID_FILE_ATTRIBUTES) && ((attribs & FILE_ATTRIBUTE_DIRECTORY) > 0);
+    }
+
+    return false;
+}
+
+bool IsDebuggerAttached()
+{
+    return !!::IsDebuggerPresent();
+}
+
+void BreakDebugger()
+{
+    __debugbreak();
+}
+
+const char *GetExecutableExtension()
+{
+    return ".exe";
+}
+
+char GetPathSeparator()
+{
+    return '\\';
+}
+
+std::string GetModuleDirectory()
+{
+// GetModuleHandleEx is unavailable on UWP
+#if !defined(ANGLE_IS_WINUWP)
+    static int placeholderSymbol = 0;
+    HMODULE module               = nullptr;
+    if (GetModuleHandleExW(
+            GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+            reinterpret_cast<LPCWSTR>(&placeholderSymbol), &module))
+    {
+        return GetDirectory(module);
+    }
+#endif
+    return GetDirectory(nullptr);
+}
+
+std::string GetRootDirectory()
+{
+    return "C:\\";
+}
+
+Optional<std::string> GetTempDirectory()
+{
+    char tempDirOut[MAX_PATH + 1];
+    GetTempPathA(MAX_PATH + 1, tempDirOut);
+    std::string tempDir = std::string(tempDirOut);
+
+    if (tempDir.length() < 0 || tempDir.length() > MAX_PATH)
+    {
+        return Optional<std::string>::Invalid();
+    }
+
+    if (tempDir.length() > 0 && tempDir.back() == '\\')
+    {
+        tempDir.pop_back();
+    }
+
+    return tempDir;
+}
+
+Optional<std::string> CreateTemporaryFileInDirectory(const std::string &directory)
+{
+    char fileName[MAX_PATH + 1];
+    if (GetTempFileNameA(directory.c_str(), "ANGLE", 0, fileName) == 0)
+        return Optional<std::string>::Invalid();
+
+    return std::string(fileName);
+}
+
+std::string GetLibraryPath(void *libraryHandle)
+{
+    if (!libraryHandle)
+    {
+        return "";
+    }
+
+    std::array<wchar_t, MAX_PATH> buffer;
+    if (GetModuleFileNameW(reinterpret_cast<HMODULE>(libraryHandle), buffer.data(),
+                           buffer.size()) == 0)
+    {
+        return "";
+    }
+
+    return Narrow(buffer.data());
+}
+
+void *GetLibrarySymbol(void *libraryHandle, const char *symbolName)
+{
+    if (!libraryHandle)
+    {
+        fprintf(stderr, "Module was not loaded\n");
+        return nullptr;
+    }
+
+    return reinterpret_cast<void *>(
+        GetProcAddress(reinterpret_cast<HMODULE>(libraryHandle), symbolName));
+}
+
+void CloseSystemLibrary(void *libraryHandle)
+{
+    if (libraryHandle)
+    {
+        FreeLibrary(reinterpret_cast<HMODULE>(libraryHandle));
+    }
+}
+std::string Narrow(const std::wstring_view &utf16)
+{
+    if (utf16.empty())
+    {
+        return {};
+    }
+    int requiredSize = WideCharToMultiByte(CP_UTF8, 0, utf16.data(), static_cast<int>(utf16.size()),
+                                           nullptr, 0, nullptr, nullptr);
+    std::string utf8(requiredSize, '\0');
+    WideCharToMultiByte(CP_UTF8, 0, utf16.data(), static_cast<int>(utf16.size()), &utf8[0],
+                        requiredSize, nullptr, nullptr);
+    return utf8;
+}
+
+std::wstring Widen(const std::string_view &utf8)
+{
+    if (utf8.empty())
+    {
+        return {};
+    }
+    int requiredSize =
+        MultiByteToWideChar(CP_UTF8, 0, utf8.data(), static_cast<int>(utf8.size()), nullptr, 0);
+    std::wstring utf16(requiredSize, L'\0');
+    MultiByteToWideChar(CP_UTF8, 0, utf8.data(), static_cast<int>(utf8.size()), &utf16[0],
+                        requiredSize);
+    return utf16;
+}
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/system_utils_win32.cpp b/gfx/angle/checkout/src/common/system_utils_win32.cpp
new file mode 100644
index 0000000000..5bcfa2347e
--- /dev/null
+++ b/gfx/angle/checkout/src/common/system_utils_win32.cpp
@@ -0,0 +1,235 @@
+//
+// Copyright 2019 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// system_utils_win32.cpp: Implementation of OS-specific functions for Windows.
+
+#include "common/FastVector.h"
+#include "system_utils.h"
+
+#include <array>
+
+// Must be included in this order.
+// clang-format off
+#include <windows.h>
+#include <psapi.h>
+// clang-format on
+
+namespace angle
+{
+bool UnsetEnvironmentVar(const char *variableName)
+{
+    return (SetEnvironmentVariableW(Widen(variableName).c_str(), nullptr) == TRUE);
+}
+
+bool SetEnvironmentVar(const char *variableName, const char *value)
+{
+    return (SetEnvironmentVariableW(Widen(variableName).c_str(), Widen(value).c_str()) == TRUE);
+}
+
+std::string GetEnvironmentVar(const char *variableName)
+{
+    std::wstring variableNameUtf16 = Widen(variableName);
+    FastVector<wchar_t, MAX_PATH> value;
+
+    DWORD result;
+
+    // First get the length of the variable, including the null terminator
+    result = GetEnvironmentVariableW(variableNameUtf16.c_str(), nullptr, 0);
+
+    // Zero means the variable was not found, so return now.
+    if (result == 0)
+    {
+        return std::string();
+    }
+
+    // Now size the vector to fit the data, and read the environment variable.
+    value.resize(result, 0);
+    result = GetEnvironmentVariableW(variableNameUtf16.c_str(), value.data(), result);
+
+    return Narrow(value.data());
+}
+
+void *OpenSystemLibraryWithExtensionAndGetError(const char *libraryName,
+                                                SearchType searchType,
+                                                std::string *errorOut)
+{
+    char buffer[MAX_PATH];
+    int ret = snprintf(buffer, MAX_PATH, "%s.%s", libraryName, GetSharedLibraryExtension());
+    if (ret <= 0 || ret >= MAX_PATH)
+    {
+        fprintf(stderr, "Error loading shared library: 0x%x", ret);
+        return nullptr;
+    }
+
+    HMODULE libraryModule = nullptr;
+
+    switch (searchType)
+    {
+        case SearchType::ModuleDir:
+        {
+            std::string moduleRelativePath = ConcatenatePath(GetModuleDirectory(), libraryName);
+            if (errorOut)
+            {
+                *errorOut = moduleRelativePath;
+            }
+            libraryModule = LoadLibraryW(Widen(moduleRelativePath).c_str());
+            break;
+        }
+
+        case SearchType::SystemDir:
+        {
+            if (errorOut)
+            {
+                *errorOut = libraryName;
+            }
+            libraryModule =
+                LoadLibraryExW(Widen(libraryName).c_str(), nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32);
+            break;
+        }
+
+        case SearchType::AlreadyLoaded:
+        {
+            if (errorOut)
+            {
+                *errorOut = libraryName;
+            }
+            libraryModule = GetModuleHandleW(Widen(libraryName).c_str());
+            break;
+        }
+    }
+
+    return reinterpret_cast<void *>(libraryModule);
+}
+
+namespace
+{
+class Win32PageFaultHandler : public PageFaultHandler
+{
+  public:
+    Win32PageFaultHandler(PageFaultCallback callback) : PageFaultHandler(callback) {}
+    ~Win32PageFaultHandler() override {}
+
+    bool enable() override;
+    bool disable() override;
+
+    LONG handle(PEXCEPTION_POINTERS pExceptionInfo);
+
+  private:
+    void *mVectoredExceptionHandler = nullptr;
+};
+
+Win32PageFaultHandler *gWin32PageFaultHandler = nullptr;
+static LONG CALLBACK VectoredExceptionHandler(PEXCEPTION_POINTERS info)
+{
+    return gWin32PageFaultHandler->handle(info);
+}
+
+bool SetMemoryProtection(uintptr_t start, size_t size, DWORD protections)
+{
+    DWORD oldProtect;
+    BOOL res = VirtualProtect(reinterpret_cast<LPVOID>(start), size, protections, &oldProtect);
+    if (!res)
+    {
+        DWORD lastError = GetLastError();
+        fprintf(stderr, "VirtualProtect failed: 0x%lx\n", lastError);
+        return false;
+    }
+
+    return true;
+}
+
+LONG Win32PageFaultHandler::handle(PEXCEPTION_POINTERS info)
+{
+    bool found = false;
+
+    if (info->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
+        info->ExceptionRecord->NumberParameters >= 2 &&
+        info->ExceptionRecord->ExceptionInformation[0] == 1)
+    {
+        found = mCallback(static_cast<uintptr_t>(info->ExceptionRecord->ExceptionInformation[1])) ==
+                PageFaultHandlerRangeType::InRange;
+    }
+
+    if (found)
+    {
+        return EXCEPTION_CONTINUE_EXECUTION;
+    }
+    else
+    {
+        return EXCEPTION_CONTINUE_SEARCH;
+    }
+}
+
+bool Win32PageFaultHandler::disable()
+{
+    if (mVectoredExceptionHandler)
+    {
+        ULONG res                 = RemoveVectoredExceptionHandler(mVectoredExceptionHandler);
+        mVectoredExceptionHandler = nullptr;
+        if (res == 0)
+        {
+            DWORD lastError = GetLastError();
+            fprintf(stderr, "RemoveVectoredExceptionHandler failed: 0x%lx\n", lastError);
+            return false;
+        }
+    }
+    return true;
+}
+
+bool Win32PageFaultHandler::enable()
+{
+    if (mVectoredExceptionHandler)
+    {
+        return true;
+    }
+
+    PVECTORED_EXCEPTION_HANDLER handler =
+        reinterpret_cast<PVECTORED_EXCEPTION_HANDLER>(&VectoredExceptionHandler);
+
+    mVectoredExceptionHandler = AddVectoredExceptionHandler(1, handler);
+
+    if (!mVectoredExceptionHandler)
+    {
+        DWORD lastError = GetLastError();
+        fprintf(stderr, "AddVectoredExceptionHandler failed: 0x%lx\n", lastError);
+        return false;
+    }
+    return true;
+}
+}  // namespace
+
+// Set write protection
+bool ProtectMemory(uintptr_t start, size_t size)
+{
+    return SetMemoryProtection(start, size, PAGE_READONLY);
+}
+
+// Allow reading and writing
+bool UnprotectMemory(uintptr_t start, size_t size)
+{
+    return SetMemoryProtection(start, size, PAGE_READWRITE);
+}
+
+size_t GetPageSize()
+{
+    SYSTEM_INFO info;
+    GetSystemInfo(&info);
+    return static_cast<size_t>(info.dwPageSize);
+}
+
+PageFaultHandler *CreatePageFaultHandler(PageFaultCallback callback)
+{
+    gWin32PageFaultHandler = new Win32PageFaultHandler(callback);
+    return gWin32PageFaultHandler;
+}
+
+uint64_t GetProcessMemoryUsageKB()
+{
+    PROCESS_MEMORY_COUNTERS_EX pmc;
+    ::GetProcessMemoryInfo(::GetCurrentProcess(), reinterpret_cast<PROCESS_MEMORY_COUNTERS *>(&pmc),
+                           sizeof(pmc));
+    return static_cast<uint64_t>(pmc.PrivateUsage) / 1024ull;
+}
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/base_export.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/base_export.h
new file mode 100644
index 0000000000..426047a992
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/base_export.h
@@ -0,0 +1,13 @@
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// base_export.h: Compatiblity hacks for importing Chromium's base/SHA1.
+
+#ifndef ANGLEBASE_BASE_EXPORT_H_
+#define ANGLEBASE_BASE_EXPORT_H_
+
+#define ANGLEBASE_EXPORT
+
+#endif  // ANGLEBASE_BASE_EXPORT_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/containers/mru_cache.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/containers/mru_cache.h
new file mode 100644
index 0000000000..30b564aff6
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/containers/mru_cache.h
@@ -0,0 +1,275 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file contains a template for a Most Recently Used cache that allows
+// constant-time access to items using a key, but easy identification of the
+// least-recently-used items for removal.  Each key can only be associated with
+// one payload item at a time.
+//
+// The key object will be stored twice, so it should support efficient copying.
+//
+// NOTE: While all operations are O(1), this code is written for
+// legibility rather than optimality. If future profiling identifies this as
+// a bottleneck, there is room for smaller values of 1 in the O(1). :]
+
+#ifndef ANGLEBASE_CONTAINERS_MRU_CACHE_H_
+#define ANGLEBASE_CONTAINERS_MRU_CACHE_H_
+
+#include <stddef.h>
+
+#include <algorithm>
+#include <functional>
+#include <list>
+#include <map>
+#include <unordered_map>
+#include <utility>
+
+#include "anglebase/logging.h"
+#include "anglebase/macros.h"
+
+namespace angle
+{
+
+namespace base
+{
+
+// MRUCacheBase ----------------------------------------------------------------
+
+// This template is used to standardize map type containers that can be used
+// by MRUCacheBase. This level of indirection is necessary because of the way
+// that template template params and default template params interact.
+template <class KeyType, class ValueType, class CompareType>
+struct MRUCacheStandardMap
+{
+    typedef std::map<KeyType, ValueType, CompareType> Type;
+};
+
+// Base class for the MRU cache specializations defined below.
+template <class KeyType,
+          class PayloadType,
+          class HashOrCompareType,
+          template <typename, typename, typename> class MapType = MRUCacheStandardMap>
+class MRUCacheBase
+{
+  public:
+    // The payload of the list. This maintains a copy of the key so we can
+    // efficiently delete things given an element of the list.
+    typedef std::pair<KeyType, PayloadType> value_type;
+
+  private:
+    typedef std::list<value_type> PayloadList;
+    typedef
+        typename MapType<KeyType, typename PayloadList::iterator, HashOrCompareType>::Type KeyIndex;
+
+  public:
+    typedef typename PayloadList::size_type size_type;
+
+    typedef typename PayloadList::iterator iterator;
+    typedef typename PayloadList::const_iterator const_iterator;
+    typedef typename PayloadList::reverse_iterator reverse_iterator;
+    typedef typename PayloadList::const_reverse_iterator const_reverse_iterator;
+
+    enum
+    {
+        NO_AUTO_EVICT = 0
+    };
+
+    // The max_size is the size at which the cache will prune its members to when
+    // a new item is inserted. If the caller wants to manager this itself (for
+    // example, maybe it has special work to do when something is evicted), it
+    // can pass NO_AUTO_EVICT to not restrict the cache size.
+    explicit MRUCacheBase(size_type max_size) : max_size_(max_size) {}
+
+    virtual ~MRUCacheBase() {}
+
+    size_type max_size() const { return max_size_; }
+
+    // Inserts a payload item with the given key. If an existing item has
+    // the same key, it is removed prior to insertion. An iterator indicating the
+    // inserted item will be returned (this will always be the front of the list).
+    //
+    // The payload will be forwarded.
+    template <typename Payload>
+    iterator Put(const KeyType &key, Payload &&payload)
+    {
+        // Remove any existing payload with that key.
+        typename KeyIndex::iterator index_iter = index_.find(key);
+        if (index_iter != index_.end())
+        {
+            // Erase the reference to it. The index reference will be replaced in the
+            // code below.
+            Erase(index_iter->second);
+        }
+        else if (max_size_ != NO_AUTO_EVICT)
+        {
+            // New item is being inserted which might make it larger than the maximum
+            // size: kick the oldest thing out if necessary.
+            ShrinkToSize(max_size_ - 1);
+        }
+
+        ordering_.emplace_front(key, std::forward<Payload>(payload));
+        index_.emplace(key, ordering_.begin());
+        return ordering_.begin();
+    }
+
+    // Retrieves the contents of the given key, or end() if not found. This method
+    // has the side effect of moving the requested item to the front of the
+    // recency list.
+    iterator Get(const KeyType &key)
+    {
+        typename KeyIndex::iterator index_iter = index_.find(key);
+        if (index_iter == index_.end())
+            return end();
+        typename PayloadList::iterator iter = index_iter->second;
+
+        // Move the touched item to the front of the recency ordering.
+        ordering_.splice(ordering_.begin(), ordering_, iter);
+        return ordering_.begin();
+    }
+
+    // Retrieves the payload associated with a given key and returns it via
+    // result without affecting the ordering (unlike Get).
+    iterator Peek(const KeyType &key)
+    {
+        typename KeyIndex::const_iterator index_iter = index_.find(key);
+        if (index_iter == index_.end())
+            return end();
+        return index_iter->second;
+    }
+
+    const_iterator Peek(const KeyType &key) const
+    {
+        typename KeyIndex::const_iterator index_iter = index_.find(key);
+        if (index_iter == index_.end())
+            return end();
+        return index_iter->second;
+    }
+
+    // Exchanges the contents of |this| by the contents of the |other|.
+    void Swap(MRUCacheBase &other)
+    {
+        ordering_.swap(other.ordering_);
+        index_.swap(other.index_);
+        std::swap(max_size_, other.max_size_);
+    }
+
+    // Erases the item referenced by the given iterator. An iterator to the item
+    // following it will be returned. The iterator must be valid.
+    iterator Erase(iterator pos)
+    {
+        index_.erase(pos->first);
+        return ordering_.erase(pos);
+    }
+
+    // MRUCache entries are often processed in reverse order, so we add this
+    // convenience function (not typically defined by STL containers).
+    reverse_iterator Erase(reverse_iterator pos)
+    {
+        // We have to actually give it the incremented iterator to delete, since
+        // the forward iterator that base() returns is actually one past the item
+        // being iterated over.
+        return reverse_iterator(Erase((++pos).base()));
+    }
+
+    // Shrinks the cache so it only holds |new_size| items. If |new_size| is
+    // bigger or equal to the current number of items, this will do nothing.
+    void ShrinkToSize(size_type new_size)
+    {
+        for (size_type i = size(); i > new_size; i--)
+            Erase(rbegin());
+    }
+
+    // Deletes everything from the cache.
+    void Clear()
+    {
+        index_.clear();
+        ordering_.clear();
+    }
+
+    // Returns the number of elements in the cache.
+    size_type size() const
+    {
+        // We don't use ordering_.size() for the return value because
+        // (as a linked list) it can be O(n).
+        DCHECK(index_.size() == ordering_.size());
+        return index_.size();
+    }
+
+    // Allows iteration over the list. Forward iteration starts with the most
+    // recent item and works backwards.
+    //
+    // Note that since these iterators are actually iterators over a list, you
+    // can keep them as you insert or delete things (as long as you don't delete
+    // the one you are pointing to) and they will still be valid.
+    iterator begin() { return ordering_.begin(); }
+    const_iterator begin() const { return ordering_.begin(); }
+    iterator end() { return ordering_.end(); }
+    const_iterator end() const { return ordering_.end(); }
+
+    reverse_iterator rbegin() { return ordering_.rbegin(); }
+    const_reverse_iterator rbegin() const { return ordering_.rbegin(); }
+    reverse_iterator rend() { return ordering_.rend(); }
+    const_reverse_iterator rend() const { return ordering_.rend(); }
+
+    bool empty() const { return ordering_.empty(); }
+
+  private:
+    PayloadList ordering_;
+    KeyIndex index_;
+
+    size_type max_size_;
+
+    DISALLOW_COPY_AND_ASSIGN(MRUCacheBase);
+};
+
+// MRUCache --------------------------------------------------------------------
+
+// A container that does not do anything to free its data. Use this when storing
+// value types (as opposed to pointers) in the list.
+template <class KeyType, class PayloadType, class CompareType = std::less<KeyType>>
+class MRUCache : public MRUCacheBase<KeyType, PayloadType, CompareType>
+{
+  private:
+    using ParentType = MRUCacheBase<KeyType, PayloadType, CompareType>;
+
+  public:
+    // See MRUCacheBase, noting the possibility of using NO_AUTO_EVICT.
+    explicit MRUCache(typename ParentType::size_type max_size) : ParentType(max_size) {}
+    virtual ~MRUCache() {}
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(MRUCache);
+};
+
+// HashingMRUCache ------------------------------------------------------------
+
+template <class KeyType, class ValueType, class HashType>
+struct MRUCacheHashMap
+{
+    typedef std::unordered_map<KeyType, ValueType, HashType> Type;
+};
+
+// This class is similar to MRUCache, except that it uses std::unordered_map as
+// the map type instead of std::map. Note that your KeyType must be hashable to
+// use this cache or you need to provide a hashing class.
+template <class KeyType, class PayloadType, class HashType = std::hash<KeyType>>
+class HashingMRUCache : public MRUCacheBase<KeyType, PayloadType, HashType, MRUCacheHashMap>
+{
+  private:
+    using ParentType = MRUCacheBase<KeyType, PayloadType, HashType, MRUCacheHashMap>;
+
+  public:
+    // See MRUCacheBase, noting the possibility of using NO_AUTO_EVICT.
+    explicit HashingMRUCache(typename ParentType::size_type max_size) : ParentType(max_size) {}
+    virtual ~HashingMRUCache() override {}
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(HashingMRUCache);
+};
+
+}  // namespace base
+
+}  // namespace angle
+
+#endif  // ANGLEBASE_CONTAINERS_MRU_CACHE_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/logging.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/logging.h
new file mode 100644
index 0000000000..73f81e87f2
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/logging.h
@@ -0,0 +1,26 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// logging.h: Compatiblity hacks for importing Chromium's base/numerics.
+
+#ifndef ANGLEBASE_LOGGING_H_
+#define ANGLEBASE_LOGGING_H_
+
+#include "common/debug.h"
+
+#ifndef DCHECK
+#    define DCHECK(X) ASSERT(X)
+#endif
+
+#ifndef CHECK
+#    define CHECK(X) ASSERT(X)
+#endif
+
+// Unfortunately ANGLE relies on ASSERT being an empty statement, which these libs don't respect.
+#ifndef NOTREACHED
+#    define NOTREACHED() ({ UNREACHABLE(); })
+#endif
+
+#endif  // ANGLEBASE_LOGGING_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/macros.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/macros.h
new file mode 100644
index 0000000000..06391784e4
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/macros.h
@@ -0,0 +1,17 @@
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// macros.h: Compatiblity hacks for importing Chromium's MRUCache.
+
+#ifndef ANGLEBASE_MACROS_H_
+#define ANGLEBASE_MACROS_H_
+
+// A macro to disallow the copy constructor and operator= functions.
+// This should be used in the private: declarations for a class.
+#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
+    TypeName(const TypeName &) = delete;   \
+    void operator=(const TypeName &) = delete
+
+#endif  // ANGLEBASE_MACROS_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/no_destructor.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/no_destructor.h
new file mode 100644
index 0000000000..5090dd9817
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/no_destructor.h
@@ -0,0 +1,106 @@
+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ANGLEBASE_NO_DESTRUCTOR_H_
+#define ANGLEBASE_NO_DESTRUCTOR_H_
+
+#include <new>
+#include <utility>
+
+namespace angle
+{
+
+namespace base
+{
+
+// A wrapper that makes it easy to create an object of type T with static
+// storage duration that:
+// - is only constructed on first access
+// - never invokes the destructor
+// in order to satisfy the styleguide ban on global constructors and
+// destructors.
+//
+// Runtime constant example:
+// const std::string& GetLineSeparator() {
+//  // Forwards to std::string(size_t, char, const Allocator&) constructor.
+//   static const base::NoDestructor<std::string> s(5, '-');
+//   return *s;
+// }
+//
+// More complex initialization with a lambda:
+// const std::string& GetSessionNonce() {
+//   static const base::NoDestructor<std::string> nonce([] {
+//     std::string s(16);
+//     crypto::RandString(s.data(), s.size());
+//     return s;
+//   }());
+//   return *nonce;
+// }
+//
+// NoDestructor<T> stores the object inline, so it also avoids a pointer
+// indirection and a malloc. Also note that since C++11 static local variable
+// initialization is thread-safe and so is this pattern. Code should prefer to
+// use NoDestructor<T> over:
+// - A function scoped static T* or T& that is dynamically initialized.
+// - A global base::LazyInstance<T>.
+//
+// Note that since the destructor is never run, this *will* leak memory if used
+// as a stack or member variable. Furthermore, a NoDestructor<T> should never
+// have global scope as that may require a static initializer.
+template <typename T>
+class NoDestructor
+{
+  public:
+    // Not constexpr; just write static constexpr T x = ...; if the value should
+    // be a constexpr.
+    template <typename... Args>
+    explicit NoDestructor(Args &&... args)
+    {
+        new (storage_) T(std::forward<Args>(args)...);
+    }
+
+    // Allows copy and move construction of the contained type, to allow
+    // construction from an initializer list, e.g. for std::vector.
+    explicit NoDestructor(const T &x) { new (storage_) T(x); }
+    explicit NoDestructor(T &&x) { new (storage_) T(std::move(x)); }
+
+    NoDestructor(const NoDestructor &) = delete;
+    NoDestructor &operator=(const NoDestructor &) = delete;
+
+    ~NoDestructor() = default;
+
+    const T &operator*() const { return *get(); }
+    T &operator*() { return *get(); }
+
+    const T *operator->() const { return get(); }
+    T *operator->() { return get(); }
+
+    const T *get() const { return reinterpret_cast<const T *>(storage_); }
+    T *get() { return reinterpret_cast<T *>(storage_); }
+
+  private:
+    alignas(T) char storage_[sizeof(T)];
+
+#if defined(LEAK_SANITIZER)
+    // TODO(https://crbug.com/812277): This is a hack to work around the fact
+    // that LSan doesn't seem to treat NoDestructor as a root for reachability
+    // analysis. This means that code like this:
+    //   static base::NoDestructor<std::vector<int>> v({1, 2, 3});
+    // is considered a leak. Using the standard leak sanitizer annotations to
+    // suppress leaks doesn't work: std::vector is implicitly constructed before
+    // calling the base::NoDestructor constructor.
+    //
+    // Unfortunately, I haven't been able to demonstrate this issue in simpler
+    // reproductions: until that's resolved, hold an explicit pointer to the
+    // placement-new'd object in leak sanitizer mode to help LSan realize that
+    // objects allocated by the contained type are still reachable.
+    T *storage_ptr_ = reinterpret_cast<T *>(storage_);
+#endif  // defined(LEAK_SANITIZER)
+};
+
+}  // namespace base
+
+}  // namespace angle
+
+#endif  // ANGLEBASE_NO_DESTRUCTOR_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/checked_math.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/checked_math.h
new file mode 100644
index 0000000000..18bceb7468
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/checked_math.h
@@ -0,0 +1,384 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_CHECKED_MATH_H_
+#define BASE_NUMERICS_CHECKED_MATH_H_
+
+#include <stddef.h>
+
+#include <limits>
+#include <type_traits>
+
+#include "anglebase/numerics/checked_math_impl.h"
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+template <typename T>
+class CheckedNumeric
+{
+    static_assert(std::is_arithmetic<T>::value, "CheckedNumeric<T>: T must be a numeric type.");
+
+  public:
+    template <typename Src>
+    friend class CheckedNumeric;
+
+    using type = T;
+
+    constexpr CheckedNumeric() = default;
+
+    // Copy constructor.
+    template <typename Src>
+    constexpr CheckedNumeric(const CheckedNumeric<Src> &rhs)
+        : state_(rhs.state_.value(), rhs.IsValid())
+    {}
+
+    // This is not an explicit constructor because we implicitly upgrade regular
+    // numerics to CheckedNumerics to make them easier to use.
+    template <typename Src>
+    constexpr CheckedNumeric(Src value)  // NOLINT(runtime/explicit)
+        : state_(value)
+    {
+        static_assert(std::is_arithmetic<Src>::value, "Argument must be numeric.");
+    }
+
+    // This is not an explicit constructor because we want a seamless conversion
+    // from StrictNumeric types.
+    template <typename Src>
+    constexpr CheckedNumeric(StrictNumeric<Src> value)  // NOLINT(runtime/explicit)
+        : state_(static_cast<Src>(value))
+    {}
+
+    // IsValid() - The public API to test if a CheckedNumeric is currently valid.
+    // A range checked destination type can be supplied using the Dst template
+    // parameter.
+    template <typename Dst = T>
+    constexpr bool IsValid() const
+    {
+        return state_.is_valid() && IsValueInRangeForNumericType<Dst>(state_.value());
+    }
+
+    // AssignIfValid(Dst) - Assigns the underlying value if it is currently valid
+    // and is within the range supported by the destination type. Returns true if
+    // successful and false otherwise.
+    template <typename Dst>
+#if defined(__clang__) || defined(__GNUC__)
+    __attribute__((warn_unused_result))
+#elif defined(_MSC_VER)
+    _Check_return_
+#endif
+    constexpr bool
+    AssignIfValid(Dst *result) const
+    {
+        return BASE_NUMERICS_LIKELY(IsValid<Dst>())
+                   ? ((*result = static_cast<Dst>(state_.value())), true)
+                   : false;
+    }
+
+    // ValueOrDie() - The primary accessor for the underlying value. If the
+    // current state is not valid it will CHECK and crash.
+    // A range checked destination type can be supplied using the Dst template
+    // parameter, which will trigger a CHECK if the value is not in bounds for
+    // the destination.
+    // The CHECK behavior can be overridden by supplying a handler as a
+    // template parameter, for test code, etc. However, the handler cannot access
+    // the underlying value, and it is not available through other means.
+    template <typename Dst = T, class CheckHandler = CheckOnFailure>
+    constexpr StrictNumeric<Dst> ValueOrDie() const
+    {
+        return BASE_NUMERICS_LIKELY(IsValid<Dst>()) ? static_cast<Dst>(state_.value())
+                                                    : CheckHandler::template HandleFailure<Dst>();
+    }
+
+    // ValueOrDefault(T default_value) - A convenience method that returns the
+    // current value if the state is valid, and the supplied default_value for
+    // any other state.
+    // A range checked destination type can be supplied using the Dst template
+    // parameter. WARNING: This function may fail to compile or CHECK at runtime
+    // if the supplied default_value is not within range of the destination type.
+    template <typename Dst = T, typename Src>
+    constexpr StrictNumeric<Dst> ValueOrDefault(const Src default_value) const
+    {
+        return BASE_NUMERICS_LIKELY(IsValid<Dst>()) ? static_cast<Dst>(state_.value())
+                                                    : checked_cast<Dst>(default_value);
+    }
+
+    // Returns a checked numeric of the specified type, cast from the current
+    // CheckedNumeric. If the current state is invalid or the destination cannot
+    // represent the result then the returned CheckedNumeric will be invalid.
+    template <typename Dst>
+    constexpr CheckedNumeric<typename UnderlyingType<Dst>::type> Cast() const
+    {
+        return *this;
+    }
+
+    // This friend method is available solely for providing more detailed logging
+    // in the tests. Do not implement it in production code, because the
+    // underlying values may change at any time.
+    template <typename U>
+    friend U GetNumericValueForTest(const CheckedNumeric<U> &src);
+
+    // Prototypes for the supported arithmetic operator overloads.
+    template <typename Src>
+    constexpr CheckedNumeric &operator+=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator-=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator*=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator/=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator%=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator<<=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator>>=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator&=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator|=(const Src rhs);
+    template <typename Src>
+    constexpr CheckedNumeric &operator^=(const Src rhs);
+
+    constexpr CheckedNumeric operator-() const
+    {
+        // Use an optimized code path for a known run-time variable.
+        if (!MustTreatAsConstexpr(state_.value()) && std::is_signed<T>::value &&
+            std::is_floating_point<T>::value)
+        {
+            return FastRuntimeNegate();
+        }
+        // The negation of two's complement int min is int min.
+        const bool is_valid =
+            IsValid() && (!std::is_signed<T>::value || std::is_floating_point<T>::value ||
+                          NegateWrapper(state_.value()) != std::numeric_limits<T>::lowest());
+        return CheckedNumeric<T>(NegateWrapper(state_.value()), is_valid);
+    }
+
+    constexpr CheckedNumeric operator~() const
+    {
+        return CheckedNumeric<decltype(InvertWrapper(T()))>(InvertWrapper(state_.value()),
+                                                            IsValid());
+    }
+
+    constexpr CheckedNumeric Abs() const
+    {
+        return !IsValueNegative(state_.value()) ? *this : -*this;
+    }
+
+    template <typename U>
+    constexpr CheckedNumeric<typename MathWrapper<CheckedMaxOp, T, U>::type> Max(const U rhs) const
+    {
+        return CheckMax(*this, rhs);
+    }
+
+    template <typename U>
+    constexpr CheckedNumeric<typename MathWrapper<CheckedMinOp, T, U>::type> Min(const U rhs) const
+    {
+        return CheckMin(*this, rhs);
+    }
+
+    // This function is available only for integral types. It returns an unsigned
+    // integer of the same width as the source type, containing the absolute value
+    // of the source, and properly handling signed min.
+    constexpr CheckedNumeric<typename UnsignedOrFloatForSize<T>::type> UnsignedAbs() const
+    {
+        return CheckedNumeric<typename UnsignedOrFloatForSize<T>::type>(
+            SafeUnsignedAbs(state_.value()), state_.is_valid());
+    }
+
+    constexpr CheckedNumeric &operator++()
+    {
+        *this += 1;
+        return *this;
+    }
+
+    constexpr CheckedNumeric operator++(int)
+    {
+        CheckedNumeric value = *this;
+        *this += 1;
+        return value;
+    }
+
+    constexpr CheckedNumeric &operator--()
+    {
+        *this -= 1;
+        return *this;
+    }
+
+    constexpr CheckedNumeric operator--(int)
+    {
+        // TODO(pkasting): Consider std::exchange() once it's constexpr in C++20.
+        const CheckedNumeric value = *this;
+        *this -= 1;
+        return value;
+    }
+
+    // These perform the actual math operations on the CheckedNumerics.
+    // Binary arithmetic operations.
+    template <template <typename, typename, typename> class M, typename L, typename R>
+    static constexpr CheckedNumeric MathOp(const L lhs, const R rhs)
+    {
+        using Math          = typename MathWrapper<M, L, R>::math;
+        T result            = 0;
+        const bool is_valid = Wrapper<L>::is_valid(lhs) && Wrapper<R>::is_valid(rhs) &&
+                              Math::Do(Wrapper<L>::value(lhs), Wrapper<R>::value(rhs), &result);
+        return CheckedNumeric<T>(result, is_valid);
+    }
+
+    // Assignment arithmetic operations.
+    template <template <typename, typename, typename> class M, typename R>
+    constexpr CheckedNumeric &MathOp(const R rhs)
+    {
+        using Math          = typename MathWrapper<M, T, R>::math;
+        T result            = 0;  // Using T as the destination saves a range check.
+        const bool is_valid = state_.is_valid() && Wrapper<R>::is_valid(rhs) &&
+                              Math::Do(state_.value(), Wrapper<R>::value(rhs), &result);
+        *this = CheckedNumeric<T>(result, is_valid);
+        return *this;
+    }
+
+  private:
+    CheckedNumericState<T> state_;
+
+    CheckedNumeric FastRuntimeNegate() const
+    {
+        T result;
+        const bool success = CheckedSubOp<T, T>::Do(T(0), state_.value(), &result);
+        return CheckedNumeric<T>(result, IsValid() && success);
+    }
+
+    template <typename Src>
+    constexpr CheckedNumeric(Src value, bool is_valid) : state_(value, is_valid)
+    {}
+
+    // These wrappers allow us to handle state the same way for both
+    // CheckedNumeric and POD arithmetic types.
+    template <typename Src>
+    struct Wrapper
+    {
+        static constexpr bool is_valid(Src) { return true; }
+        static constexpr Src value(Src value) { return value; }
+    };
+
+    template <typename Src>
+    struct Wrapper<CheckedNumeric<Src>>
+    {
+        static constexpr bool is_valid(const CheckedNumeric<Src> v) { return v.IsValid(); }
+        static constexpr Src value(const CheckedNumeric<Src> v) { return v.state_.value(); }
+    };
+
+    template <typename Src>
+    struct Wrapper<StrictNumeric<Src>>
+    {
+        static constexpr bool is_valid(const StrictNumeric<Src>) { return true; }
+        static constexpr Src value(const StrictNumeric<Src> v) { return static_cast<Src>(v); }
+    };
+};
+
+// Convenience functions to avoid the ugly template disambiguator syntax.
+template <typename Dst, typename Src>
+constexpr bool IsValidForType(const CheckedNumeric<Src> value)
+{
+    return value.template IsValid<Dst>();
+}
+
+template <typename Dst, typename Src>
+constexpr StrictNumeric<Dst> ValueOrDieForType(const CheckedNumeric<Src> value)
+{
+    return value.template ValueOrDie<Dst>();
+}
+
+template <typename Dst, typename Src, typename Default>
+constexpr StrictNumeric<Dst> ValueOrDefaultForType(const CheckedNumeric<Src> value,
+                                                   const Default default_value)
+{
+    return value.template ValueOrDefault<Dst>(default_value);
+}
+
+// Convience wrapper to return a new CheckedNumeric from the provided arithmetic
+// or CheckedNumericType.
+template <typename T>
+constexpr CheckedNumeric<typename UnderlyingType<T>::type> MakeCheckedNum(const T value)
+{
+    return value;
+}
+
+// These implement the variadic wrapper for the math operations.
+template <template <typename, typename, typename> class M, typename L, typename R>
+constexpr CheckedNumeric<typename MathWrapper<M, L, R>::type> CheckMathOp(const L lhs, const R rhs)
+{
+    using Math = typename MathWrapper<M, L, R>::math;
+    return CheckedNumeric<typename Math::result_type>::template MathOp<M>(lhs, rhs);
+}
+
+// General purpose wrapper template for arithmetic operations.
+template <template <typename, typename, typename> class M, typename L, typename R, typename... Args>
+constexpr auto CheckMathOp(const L lhs, const R rhs, const Args... args)
+{
+    return CheckMathOp<M>(CheckMathOp<M>(lhs, rhs), args...);
+}
+
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Add, +, +=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Sub, -, -=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Mul, *, *=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Div, /, /=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Mod, %, %=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Lsh, <<, <<=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Rsh, >>, >>=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, And, &, &=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Or, |, |=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Checked, Check, Xor, ^, ^=)
+BASE_NUMERIC_ARITHMETIC_VARIADIC(Checked, Check, Max)
+BASE_NUMERIC_ARITHMETIC_VARIADIC(Checked, Check, Min)
+
+// These are some extra StrictNumeric operators to support simple pointer
+// arithmetic with our result types. Since wrapping on a pointer is always
+// bad, we trigger the CHECK condition here.
+template <typename L, typename R>
+L *operator+(L *lhs, const StrictNumeric<R> rhs)
+{
+    const uintptr_t result =
+        CheckAdd(reinterpret_cast<uintptr_t>(lhs), CheckMul(sizeof(L), static_cast<R>(rhs)))
+            .template ValueOrDie<uintptr_t>();
+    return reinterpret_cast<L *>(result);
+}
+
+template <typename L, typename R>
+L *operator-(L *lhs, const StrictNumeric<R> rhs)
+{
+    const uintptr_t result =
+        CheckSub(reinterpret_cast<uintptr_t>(lhs), CheckMul(sizeof(L), static_cast<R>(rhs)))
+            .template ValueOrDie<uintptr_t>();
+    return reinterpret_cast<L *>(result);
+}
+
+}  // namespace internal
+
+using internal::CheckAdd;
+using internal::CheckAnd;
+using internal::CheckDiv;
+using internal::CheckedNumeric;
+using internal::CheckLsh;
+using internal::CheckMax;
+using internal::CheckMin;
+using internal::CheckMod;
+using internal::CheckMul;
+using internal::CheckOr;
+using internal::CheckRsh;
+using internal::CheckSub;
+using internal::CheckXor;
+using internal::IsValidForType;
+using internal::MakeCheckedNum;
+using internal::ValueOrDefaultForType;
+using internal::ValueOrDieForType;
+
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_CHECKED_MATH_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/checked_math_impl.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/checked_math_impl.h
new file mode 100644
index 0000000000..e4b6082770
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/checked_math_impl.h
@@ -0,0 +1,641 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_CHECKED_MATH_IMPL_H_
+#define BASE_NUMERICS_CHECKED_MATH_IMPL_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <climits>
+#include <cmath>
+#include <cstdlib>
+#include <limits>
+#include <type_traits>
+
+#include "anglebase/numerics/safe_conversions.h"
+#include "anglebase/numerics/safe_math_shared_impl.h"
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+template <typename T>
+constexpr bool CheckedAddImpl(T x, T y, T *result)
+{
+    static_assert(std::is_integral<T>::value, "Type must be integral");
+    // Since the value of x+y is undefined if we have a signed type, we compute
+    // it using the unsigned type of the same size.
+    using UnsignedDst         = typename std::make_unsigned<T>::type;
+    using SignedDst           = typename std::make_signed<T>::type;
+    const UnsignedDst ux      = static_cast<UnsignedDst>(x);
+    const UnsignedDst uy      = static_cast<UnsignedDst>(y);
+    const UnsignedDst uresult = static_cast<UnsignedDst>(ux + uy);
+    // Addition is valid if the sign of (x + y) is equal to either that of x or
+    // that of y.
+    if (std::is_signed<T>::value ? static_cast<SignedDst>((uresult ^ ux) & (uresult ^ uy)) < 0
+                                 : uresult < uy)  // Unsigned is either valid or underflow.
+        return false;
+    *result = static_cast<T>(uresult);
+    return true;
+}
+
+template <typename T, typename U, class Enable = void>
+struct CheckedAddOp
+{};
+
+template <typename T, typename U>
+struct CheckedAddOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        if constexpr (CheckedAddFastOp<T, U>::is_supported)
+            return CheckedAddFastOp<T, U>::Do(x, y, result);
+
+        // Double the underlying type up to a full machine word.
+        using FastPromotion = typename FastIntegerArithmeticPromotion<T, U>::type;
+        using Promotion =
+            typename std::conditional<(IntegerBitsPlusSign<FastPromotion>::value >
+                                       IntegerBitsPlusSign<intptr_t>::value),
+                                      typename BigEnoughPromotion<T, U>::type, FastPromotion>::type;
+        // Fail if either operand is out of range for the promoted type.
+        // TODO(jschuh): This could be made to work for a broader range of values.
+        if (BASE_NUMERICS_UNLIKELY(!IsValueInRangeForNumericType<Promotion>(x) ||
+                                   !IsValueInRangeForNumericType<Promotion>(y)))
+        {
+            return false;
+        }
+
+        Promotion presult = {};
+        bool is_valid     = true;
+        if constexpr (IsIntegerArithmeticSafe<Promotion, T, U>::value)
+        {
+            presult = static_cast<Promotion>(x) + static_cast<Promotion>(y);
+        }
+        else
+        {
+            is_valid =
+                CheckedAddImpl(static_cast<Promotion>(x), static_cast<Promotion>(y), &presult);
+        }
+        if (!is_valid || !IsValueInRangeForNumericType<V>(presult))
+            return false;
+        *result = static_cast<V>(presult);
+        return true;
+    }
+};
+
+template <typename T>
+constexpr bool CheckedSubImpl(T x, T y, T *result)
+{
+    static_assert(std::is_integral<T>::value, "Type must be integral");
+    // Since the value of x+y is undefined if we have a signed type, we compute
+    // it using the unsigned type of the same size.
+    using UnsignedDst         = typename std::make_unsigned<T>::type;
+    using SignedDst           = typename std::make_signed<T>::type;
+    const UnsignedDst ux      = static_cast<UnsignedDst>(x);
+    const UnsignedDst uy      = static_cast<UnsignedDst>(y);
+    const UnsignedDst uresult = static_cast<UnsignedDst>(ux - uy);
+    // Subtraction is valid if either x and y have same sign, or (x-y) and x have
+    // the same sign.
+    if (std::is_signed<T>::value ? static_cast<SignedDst>((uresult ^ ux) & (ux ^ uy)) < 0 : x < y)
+        return false;
+    *result = static_cast<T>(uresult);
+    return true;
+}
+
+template <typename T, typename U, class Enable = void>
+struct CheckedSubOp
+{};
+
+template <typename T, typename U>
+struct CheckedSubOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        if constexpr (CheckedSubFastOp<T, U>::is_supported)
+            return CheckedSubFastOp<T, U>::Do(x, y, result);
+
+        // Double the underlying type up to a full machine word.
+        using FastPromotion = typename FastIntegerArithmeticPromotion<T, U>::type;
+        using Promotion =
+            typename std::conditional<(IntegerBitsPlusSign<FastPromotion>::value >
+                                       IntegerBitsPlusSign<intptr_t>::value),
+                                      typename BigEnoughPromotion<T, U>::type, FastPromotion>::type;
+        // Fail if either operand is out of range for the promoted type.
+        // TODO(jschuh): This could be made to work for a broader range of values.
+        if (BASE_NUMERICS_UNLIKELY(!IsValueInRangeForNumericType<Promotion>(x) ||
+                                   !IsValueInRangeForNumericType<Promotion>(y)))
+        {
+            return false;
+        }
+
+        Promotion presult = {};
+        bool is_valid     = true;
+        if constexpr (IsIntegerArithmeticSafe<Promotion, T, U>::value)
+        {
+            presult = static_cast<Promotion>(x) - static_cast<Promotion>(y);
+        }
+        else
+        {
+            is_valid =
+                CheckedSubImpl(static_cast<Promotion>(x), static_cast<Promotion>(y), &presult);
+        }
+        if (!is_valid || !IsValueInRangeForNumericType<V>(presult))
+            return false;
+        *result = static_cast<V>(presult);
+        return true;
+    }
+};
+
+template <typename T>
+constexpr bool CheckedMulImpl(T x, T y, T *result)
+{
+    static_assert(std::is_integral<T>::value, "Type must be integral");
+    // Since the value of x*y is potentially undefined if we have a signed type,
+    // we compute it using the unsigned type of the same size.
+    using UnsignedDst         = typename std::make_unsigned<T>::type;
+    using SignedDst           = typename std::make_signed<T>::type;
+    const UnsignedDst ux      = SafeUnsignedAbs(x);
+    const UnsignedDst uy      = SafeUnsignedAbs(y);
+    const UnsignedDst uresult = static_cast<UnsignedDst>(ux * uy);
+    const bool is_negative    = std::is_signed<T>::value && static_cast<SignedDst>(x ^ y) < 0;
+    // We have a fast out for unsigned identity or zero on the second operand.
+    // After that it's an unsigned overflow check on the absolute value, with
+    // a +1 bound for a negative result.
+    if (uy > UnsignedDst(!std::is_signed<T>::value || is_negative) &&
+        ux > (std::numeric_limits<T>::max() + UnsignedDst(is_negative)) / uy)
+        return false;
+    *result = is_negative ? 0 - uresult : uresult;
+    return true;
+}
+
+template <typename T, typename U, class Enable = void>
+struct CheckedMulOp
+{};
+
+template <typename T, typename U>
+struct CheckedMulOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        if constexpr (CheckedMulFastOp<T, U>::is_supported)
+            return CheckedMulFastOp<T, U>::Do(x, y, result);
+
+        using Promotion = typename FastIntegerArithmeticPromotion<T, U>::type;
+        // Verify the destination type can hold the result (always true for 0).
+        if (BASE_NUMERICS_UNLIKELY((!IsValueInRangeForNumericType<Promotion>(x) ||
+                                    !IsValueInRangeForNumericType<Promotion>(y)) &&
+                                   x && y))
+        {
+            return false;
+        }
+
+        Promotion presult = {};
+        bool is_valid     = true;
+        if constexpr (CheckedMulFastOp<Promotion, Promotion>::is_supported)
+        {
+            // The fast op may be available with the promoted type.
+            is_valid = CheckedMulFastOp<Promotion, Promotion>::Do(x, y, &presult);
+        }
+        else if (IsIntegerArithmeticSafe<Promotion, T, U>::value)
+        {
+            presult = static_cast<Promotion>(x) * static_cast<Promotion>(y);
+        }
+        else
+        {
+            is_valid =
+                CheckedMulImpl(static_cast<Promotion>(x), static_cast<Promotion>(y), &presult);
+        }
+        if (!is_valid || !IsValueInRangeForNumericType<V>(presult))
+            return false;
+        *result = static_cast<V>(presult);
+        return true;
+    }
+};
+
+// Division just requires a check for a zero denominator or an invalid negation
+// on signed min/-1.
+template <typename T, typename U, class Enable = void>
+struct CheckedDivOp
+{};
+
+template <typename T, typename U>
+struct CheckedDivOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        if (BASE_NUMERICS_UNLIKELY(!y))
+            return false;
+
+        // The overflow check can be compiled away if we don't have the exact
+        // combination of types needed to trigger this case.
+        using Promotion = typename BigEnoughPromotion<T, U>::type;
+        if (BASE_NUMERICS_UNLIKELY(
+                (std::is_signed<T>::value && std::is_signed<U>::value &&
+                 IsTypeInRangeForNumericType<T, Promotion>::value &&
+                 static_cast<Promotion>(x) == std::numeric_limits<Promotion>::lowest() &&
+                 y == static_cast<U>(-1))))
+        {
+            return false;
+        }
+
+        // This branch always compiles away if the above branch wasn't removed.
+        if (BASE_NUMERICS_UNLIKELY((!IsValueInRangeForNumericType<Promotion>(x) ||
+                                    !IsValueInRangeForNumericType<Promotion>(y)) &&
+                                   x))
+        {
+            return false;
+        }
+
+        const Promotion presult = Promotion(x) / Promotion(y);
+        if (!IsValueInRangeForNumericType<V>(presult))
+            return false;
+        *result = static_cast<V>(presult);
+        return true;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct CheckedModOp
+{};
+
+template <typename T, typename U>
+struct CheckedModOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        if (BASE_NUMERICS_UNLIKELY(!y))
+            return false;
+
+        using Promotion = typename BigEnoughPromotion<T, U>::type;
+        if (BASE_NUMERICS_UNLIKELY(
+                (std::is_signed<T>::value && std::is_signed<U>::value &&
+                 IsTypeInRangeForNumericType<T, Promotion>::value &&
+                 static_cast<Promotion>(x) == std::numeric_limits<Promotion>::lowest() &&
+                 y == static_cast<U>(-1))))
+        {
+            *result = 0;
+            return true;
+        }
+
+        const Promotion presult = static_cast<Promotion>(x) % static_cast<Promotion>(y);
+        if (!IsValueInRangeForNumericType<V>(presult))
+            return false;
+        *result = static_cast<Promotion>(presult);
+        return true;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct CheckedLshOp
+{};
+
+// Left shift. Shifts less than 0 or greater than or equal to the number
+// of bits in the promoted type are undefined. Shifts of negative values
+// are undefined. Otherwise it is defined when the result fits.
+template <typename T, typename U>
+struct CheckedLshOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = T;
+    template <typename V>
+    static constexpr bool Do(T x, U shift, V *result)
+    {
+        // Disallow negative numbers and verify the shift is in bounds.
+        if (BASE_NUMERICS_LIKELY(!IsValueNegative(x) &&
+                                 as_unsigned(shift) < as_unsigned(std::numeric_limits<T>::digits)))
+        {
+            // Shift as unsigned to avoid undefined behavior.
+            *result = static_cast<V>(as_unsigned(x) << shift);
+            // If the shift can be reversed, we know it was valid.
+            return *result >> shift == x;
+        }
+
+        // Handle the legal corner-case of a full-width signed shift of zero.
+        if (!std::is_signed<T>::value || x ||
+            as_unsigned(shift) != as_unsigned(std::numeric_limits<T>::digits))
+            return false;
+        *result = 0;
+        return true;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct CheckedRshOp
+{};
+
+// Right shift. Shifts less than 0 or greater than or equal to the number
+// of bits in the promoted type are undefined. Otherwise, it is always defined,
+// but a right shift of a negative value is implementation-dependent.
+template <typename T, typename U>
+struct CheckedRshOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = T;
+    template <typename V>
+    static bool Do(T x, U shift, V *result)
+    {
+        // Use sign conversion to push negative values out of range.
+        if (BASE_NUMERICS_UNLIKELY(as_unsigned(shift) >= IntegerBitsPlusSign<T>::value))
+        {
+            return false;
+        }
+
+        const T tmp = x >> shift;
+        if (!IsValueInRangeForNumericType<V>(tmp))
+            return false;
+        *result = static_cast<V>(tmp);
+        return true;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct CheckedAndOp
+{};
+
+// For simplicity we support only unsigned integer results.
+template <typename T, typename U>
+struct CheckedAndOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type =
+        typename std::make_unsigned<typename MaxExponentPromotion<T, U>::type>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        const result_type tmp = static_cast<result_type>(x) & static_cast<result_type>(y);
+        if (!IsValueInRangeForNumericType<V>(tmp))
+            return false;
+        *result = static_cast<V>(tmp);
+        return true;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct CheckedOrOp
+{};
+
+// For simplicity we support only unsigned integers.
+template <typename T, typename U>
+struct CheckedOrOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type =
+        typename std::make_unsigned<typename MaxExponentPromotion<T, U>::type>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        const result_type tmp = static_cast<result_type>(x) | static_cast<result_type>(y);
+        if (!IsValueInRangeForNumericType<V>(tmp))
+            return false;
+        *result = static_cast<V>(tmp);
+        return true;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct CheckedXorOp
+{};
+
+// For simplicity we support only unsigned integers.
+template <typename T, typename U>
+struct CheckedXorOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type =
+        typename std::make_unsigned<typename MaxExponentPromotion<T, U>::type>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        const result_type tmp = static_cast<result_type>(x) ^ static_cast<result_type>(y);
+        if (!IsValueInRangeForNumericType<V>(tmp))
+            return false;
+        *result = static_cast<V>(tmp);
+        return true;
+    }
+};
+
+// Max doesn't really need to be implemented this way because it can't fail,
+// but it makes the code much cleaner to use the MathOp wrappers.
+template <typename T, typename U, class Enable = void>
+struct CheckedMaxOp
+{};
+
+template <typename T, typename U>
+struct CheckedMaxOp<
+    T,
+    U,
+    typename std::enable_if<std::is_arithmetic<T>::value && std::is_arithmetic<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        const result_type tmp =
+            IsGreater<T, U>::Test(x, y) ? static_cast<result_type>(x) : static_cast<result_type>(y);
+        if (!IsValueInRangeForNumericType<V>(tmp))
+            return false;
+        *result = static_cast<V>(tmp);
+        return true;
+    }
+};
+
+// Min doesn't really need to be implemented this way because it can't fail,
+// but it makes the code much cleaner to use the MathOp wrappers.
+template <typename T, typename U, class Enable = void>
+struct CheckedMinOp
+{};
+
+template <typename T, typename U>
+struct CheckedMinOp<
+    T,
+    U,
+    typename std::enable_if<std::is_arithmetic<T>::value && std::is_arithmetic<U>::value>::type>
+{
+    using result_type = typename LowestValuePromotion<T, U>::type;
+    template <typename V>
+    static constexpr bool Do(T x, U y, V *result)
+    {
+        const result_type tmp =
+            IsLess<T, U>::Test(x, y) ? static_cast<result_type>(x) : static_cast<result_type>(y);
+        if (!IsValueInRangeForNumericType<V>(tmp))
+            return false;
+        *result = static_cast<V>(tmp);
+        return true;
+    }
+};
+
+// This is just boilerplate that wraps the standard floating point arithmetic.
+// A macro isn't the nicest solution, but it beats rewriting these repeatedly.
+#define BASE_FLOAT_ARITHMETIC_OPS(NAME, OP)                                                   \
+    template <typename T, typename U>                                                         \
+    struct Checked##NAME##Op<T, U,                                                            \
+                             typename std::enable_if<std::is_floating_point<T>::value ||      \
+                                                     std::is_floating_point<U>::value>::type> \
+    {                                                                                         \
+        using result_type = typename MaxExponentPromotion<T, U>::type;                        \
+        template <typename V>                                                                 \
+        static constexpr bool Do(T x, U y, V *result)                                         \
+        {                                                                                     \
+            using Promotion         = typename MaxExponentPromotion<T, U>::type;              \
+            const Promotion presult = x OP y;                                                 \
+            if (!IsValueInRangeForNumericType<V>(presult))                                    \
+                return false;                                                                 \
+            *result = static_cast<V>(presult);                                                \
+            return true;                                                                      \
+        }                                                                                     \
+    };
+
+BASE_FLOAT_ARITHMETIC_OPS(Add, +)
+BASE_FLOAT_ARITHMETIC_OPS(Sub, -)
+BASE_FLOAT_ARITHMETIC_OPS(Mul, *)
+BASE_FLOAT_ARITHMETIC_OPS(Div, /)
+
+#undef BASE_FLOAT_ARITHMETIC_OPS
+
+// Floats carry around their validity state with them, but integers do not. So,
+// we wrap the underlying value in a specialization in order to hide that detail
+// and expose an interface via accessors.
+enum NumericRepresentation
+{
+    NUMERIC_INTEGER,
+    NUMERIC_FLOATING,
+    NUMERIC_UNKNOWN
+};
+
+template <typename NumericType>
+struct GetNumericRepresentation
+{
+    static const NumericRepresentation value =
+        std::is_integral<NumericType>::value
+            ? NUMERIC_INTEGER
+            : (std::is_floating_point<NumericType>::value ? NUMERIC_FLOATING : NUMERIC_UNKNOWN);
+};
+
+template <typename T, NumericRepresentation type = GetNumericRepresentation<T>::value>
+class CheckedNumericState
+{};
+
+// Integrals require quite a bit of additional housekeeping to manage state.
+template <typename T>
+class CheckedNumericState<T, NUMERIC_INTEGER>
+{
+  public:
+    template <typename Src = int>
+    constexpr explicit CheckedNumericState(Src value = 0, bool is_valid = true)
+        : is_valid_(is_valid && IsValueInRangeForNumericType<T>(value)),
+          value_(WellDefinedConversionOrZero(value, is_valid_))
+    {
+        static_assert(std::is_arithmetic<Src>::value, "Argument must be numeric.");
+    }
+
+    template <typename Src>
+    constexpr CheckedNumericState(const CheckedNumericState<Src> &rhs)
+        : CheckedNumericState(rhs.value(), rhs.is_valid())
+    {}
+
+    constexpr bool is_valid() const { return is_valid_; }
+
+    constexpr T value() const { return value_; }
+
+  private:
+    // Ensures that a type conversion does not trigger undefined behavior.
+    template <typename Src>
+    static constexpr T WellDefinedConversionOrZero(Src value, bool is_valid)
+    {
+        using SrcType = typename internal::UnderlyingType<Src>::type;
+        return (std::is_integral<SrcType>::value || is_valid) ? static_cast<T>(value) : 0;
+    }
+
+    // is_valid_ precedes value_ because member intializers in the constructors
+    // are evaluated in field order, and is_valid_ must be read when initializing
+    // value_.
+    bool is_valid_;
+    T value_;
+};
+
+// Floating points maintain their own validity, but need translation wrappers.
+template <typename T>
+class CheckedNumericState<T, NUMERIC_FLOATING>
+{
+  public:
+    template <typename Src = double>
+    constexpr explicit CheckedNumericState(Src value = 0.0, bool is_valid = true)
+        : value_(
+              WellDefinedConversionOrNaN(value, is_valid && IsValueInRangeForNumericType<T>(value)))
+    {}
+
+    template <typename Src>
+    constexpr CheckedNumericState(const CheckedNumericState<Src> &rhs)
+        : CheckedNumericState(rhs.value(), rhs.is_valid())
+    {}
+
+    constexpr bool is_valid() const
+    {
+        // Written this way because std::isfinite is not reliably constexpr.
+        return MustTreatAsConstexpr(value_) ? value_ <= std::numeric_limits<T>::max() &&
+                                                  value_ >= std::numeric_limits<T>::lowest()
+                                            : std::isfinite(value_);
+    }
+
+    constexpr T value() const { return value_; }
+
+  private:
+    // Ensures that a type conversion does not trigger undefined behavior.
+    template <typename Src>
+    static constexpr T WellDefinedConversionOrNaN(Src value, bool is_valid)
+    {
+        using SrcType = typename internal::UnderlyingType<Src>::type;
+        return (StaticDstRangeRelationToSrcRange<T, SrcType>::value == NUMERIC_RANGE_CONTAINED ||
+                is_valid)
+                   ? static_cast<T>(value)
+                   : std::numeric_limits<T>::quiet_NaN();
+    }
+
+    T value_;
+};
+
+}  // namespace internal
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_CHECKED_MATH_IMPL_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/clamped_math.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/clamped_math.h
new file mode 100644
index 0000000000..33d2e4b233
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/clamped_math.h
@@ -0,0 +1,270 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_CLAMPED_MATH_H_
+#define BASE_NUMERICS_CLAMPED_MATH_H_
+
+#include <stddef.h>
+
+#include <limits>
+#include <type_traits>
+
+#include "anglebase/numerics/clamped_math_impl.h"
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+template <typename T>
+class ClampedNumeric
+{
+    static_assert(std::is_arithmetic<T>::value, "ClampedNumeric<T>: T must be a numeric type.");
+
+  public:
+    using type = T;
+
+    constexpr ClampedNumeric() : value_(0) {}
+
+    // Copy constructor.
+    template <typename Src>
+    constexpr ClampedNumeric(const ClampedNumeric<Src> &rhs) : value_(saturated_cast<T>(rhs.value_))
+    {}
+
+    template <typename Src>
+    friend class ClampedNumeric;
+
+    // This is not an explicit constructor because we implicitly upgrade regular
+    // numerics to ClampedNumerics to make them easier to use.
+    template <typename Src>
+    constexpr ClampedNumeric(Src value)  // NOLINT(runtime/explicit)
+        : value_(saturated_cast<T>(value))
+    {
+        static_assert(std::is_arithmetic<Src>::value, "Argument must be numeric.");
+    }
+
+    // This is not an explicit constructor because we want a seamless conversion
+    // from StrictNumeric types.
+    template <typename Src>
+    constexpr ClampedNumeric(StrictNumeric<Src> value)  // NOLINT(runtime/explicit)
+        : value_(saturated_cast<T>(static_cast<Src>(value)))
+    {}
+
+    // Returns a ClampedNumeric of the specified type, cast from the current
+    // ClampedNumeric, and saturated to the destination type.
+    template <typename Dst>
+    constexpr ClampedNumeric<typename UnderlyingType<Dst>::type> Cast() const
+    {
+        return *this;
+    }
+
+    // Prototypes for the supported arithmetic operator overloads.
+    template <typename Src>
+    constexpr ClampedNumeric &operator+=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator-=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator*=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator/=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator%=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator<<=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator>>=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator&=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator|=(const Src rhs);
+    template <typename Src>
+    constexpr ClampedNumeric &operator^=(const Src rhs);
+
+    constexpr ClampedNumeric operator-() const
+    {
+        // The negation of two's complement int min is int min, so that's the
+        // only overflow case where we will saturate.
+        return ClampedNumeric<T>(SaturatedNegWrapper(value_));
+    }
+
+    constexpr ClampedNumeric operator~() const
+    {
+        return ClampedNumeric<decltype(InvertWrapper(T()))>(InvertWrapper(value_));
+    }
+
+    constexpr ClampedNumeric Abs() const
+    {
+        // The negation of two's complement int min is int min, so that's the
+        // only overflow case where we will saturate.
+        return ClampedNumeric<T>(SaturatedAbsWrapper(value_));
+    }
+
+    template <typename U>
+    constexpr ClampedNumeric<typename MathWrapper<ClampedMaxOp, T, U>::type> Max(const U rhs) const
+    {
+        using result_type = typename MathWrapper<ClampedMaxOp, T, U>::type;
+        return ClampedNumeric<result_type>(ClampedMaxOp<T, U>::Do(value_, Wrapper<U>::value(rhs)));
+    }
+
+    template <typename U>
+    constexpr ClampedNumeric<typename MathWrapper<ClampedMinOp, T, U>::type> Min(const U rhs) const
+    {
+        using result_type = typename MathWrapper<ClampedMinOp, T, U>::type;
+        return ClampedNumeric<result_type>(ClampedMinOp<T, U>::Do(value_, Wrapper<U>::value(rhs)));
+    }
+
+    // This function is available only for integral types. It returns an unsigned
+    // integer of the same width as the source type, containing the absolute value
+    // of the source, and properly handling signed min.
+    constexpr ClampedNumeric<typename UnsignedOrFloatForSize<T>::type> UnsignedAbs() const
+    {
+        return ClampedNumeric<typename UnsignedOrFloatForSize<T>::type>(SafeUnsignedAbs(value_));
+    }
+
+    constexpr ClampedNumeric &operator++()
+    {
+        *this += 1;
+        return *this;
+    }
+
+    constexpr ClampedNumeric operator++(int)
+    {
+        ClampedNumeric value = *this;
+        *this += 1;
+        return value;
+    }
+
+    constexpr ClampedNumeric &operator--()
+    {
+        *this -= 1;
+        return *this;
+    }
+
+    constexpr ClampedNumeric operator--(int)
+    {
+        ClampedNumeric value = *this;
+        *this -= 1;
+        return value;
+    }
+
+    // These perform the actual math operations on the ClampedNumerics.
+    // Binary arithmetic operations.
+    template <template <typename, typename, typename> class M, typename L, typename R>
+    static constexpr ClampedNumeric MathOp(const L lhs, const R rhs)
+    {
+        using Math = typename MathWrapper<M, L, R>::math;
+        return ClampedNumeric<T>(
+            Math::template Do<T>(Wrapper<L>::value(lhs), Wrapper<R>::value(rhs)));
+    }
+
+    // Assignment arithmetic operations.
+    template <template <typename, typename, typename> class M, typename R>
+    constexpr ClampedNumeric &MathOp(const R rhs)
+    {
+        using Math = typename MathWrapper<M, T, R>::math;
+        *this      = ClampedNumeric<T>(Math::template Do<T>(value_, Wrapper<R>::value(rhs)));
+        return *this;
+    }
+
+    template <typename Dst>
+    constexpr operator Dst() const
+    {
+        return saturated_cast<typename ArithmeticOrUnderlyingEnum<Dst>::type>(value_);
+    }
+
+    // This method extracts the raw integer value without saturating it to the
+    // destination type as the conversion operator does. This is useful when
+    // e.g. assigning to an auto type or passing as a deduced template parameter.
+    constexpr T RawValue() const { return value_; }
+
+  private:
+    T value_;
+
+    // These wrappers allow us to handle state the same way for both
+    // ClampedNumeric and POD arithmetic types.
+    template <typename Src>
+    struct Wrapper
+    {
+        static constexpr Src value(Src value)
+        {
+            return static_cast<typename UnderlyingType<Src>::type>(value);
+        }
+    };
+};
+
+// Convience wrapper to return a new ClampedNumeric from the provided arithmetic
+// or ClampedNumericType.
+template <typename T>
+constexpr ClampedNumeric<typename UnderlyingType<T>::type> MakeClampedNum(const T value)
+{
+    return value;
+}
+
+#if !BASE_NUMERICS_DISABLE_OSTREAM_OPERATORS
+// Overload the ostream output operator to make logging work nicely.
+template <typename T>
+std::ostream &operator<<(std::ostream &os, const ClampedNumeric<T> &value)
+{
+    os << static_cast<T>(value);
+    return os;
+}
+#endif
+
+// These implement the variadic wrapper for the math operations.
+template <template <typename, typename, typename> class M, typename L, typename R>
+constexpr ClampedNumeric<typename MathWrapper<M, L, R>::type> ClampMathOp(const L lhs, const R rhs)
+{
+    using Math = typename MathWrapper<M, L, R>::math;
+    return ClampedNumeric<typename Math::result_type>::template MathOp<M>(lhs, rhs);
+}
+
+// General purpose wrapper template for arithmetic operations.
+template <template <typename, typename, typename> class M, typename L, typename R, typename... Args>
+constexpr auto ClampMathOp(const L lhs, const R rhs, const Args... args)
+{
+    return ClampMathOp<M>(ClampMathOp<M>(lhs, rhs), args...);
+}
+
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Add, +, +=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Sub, -, -=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Mul, *, *=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Div, /, /=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Mod, %, %=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Lsh, <<, <<=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Rsh, >>, >>=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, And, &, &=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Or, |, |=)
+BASE_NUMERIC_ARITHMETIC_OPERATORS(Clamped, Clamp, Xor, ^, ^=)
+BASE_NUMERIC_ARITHMETIC_VARIADIC(Clamped, Clamp, Max)
+BASE_NUMERIC_ARITHMETIC_VARIADIC(Clamped, Clamp, Min)
+BASE_NUMERIC_COMPARISON_OPERATORS(Clamped, IsLess, <)
+BASE_NUMERIC_COMPARISON_OPERATORS(Clamped, IsLessOrEqual, <=)
+BASE_NUMERIC_COMPARISON_OPERATORS(Clamped, IsGreater, >)
+BASE_NUMERIC_COMPARISON_OPERATORS(Clamped, IsGreaterOrEqual, >=)
+BASE_NUMERIC_COMPARISON_OPERATORS(Clamped, IsEqual, ==)
+BASE_NUMERIC_COMPARISON_OPERATORS(Clamped, IsNotEqual, !=)
+
+}  // namespace internal
+
+using internal::ClampAdd;
+using internal::ClampAnd;
+using internal::ClampDiv;
+using internal::ClampedNumeric;
+using internal::ClampLsh;
+using internal::ClampMax;
+using internal::ClampMin;
+using internal::ClampMod;
+using internal::ClampMul;
+using internal::ClampOr;
+using internal::ClampRsh;
+using internal::ClampSub;
+using internal::ClampXor;
+using internal::MakeClampedNum;
+
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_CLAMPED_MATH_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/clamped_math_impl.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/clamped_math_impl.h
new file mode 100644
index 0000000000..198723eeaa
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/clamped_math_impl.h
@@ -0,0 +1,368 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_CLAMPED_MATH_IMPL_H_
+#define BASE_NUMERICS_CLAMPED_MATH_IMPL_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <climits>
+#include <cmath>
+#include <cstdlib>
+#include <limits>
+#include <type_traits>
+
+#include "anglebase/numerics/checked_math.h"
+#include "anglebase/numerics/safe_conversions.h"
+#include "anglebase/numerics/safe_math_shared_impl.h"
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+template <typename T,
+          typename std::enable_if<std::is_integral<T>::value && std::is_signed<T>::value>::type * =
+              nullptr>
+constexpr T SaturatedNegWrapper(T value)
+{
+    return MustTreatAsConstexpr(value) || !ClampedNegFastOp<T>::is_supported
+               ? (NegateWrapper(value) != std::numeric_limits<T>::lowest()
+                      ? NegateWrapper(value)
+                      : std::numeric_limits<T>::max())
+               : ClampedNegFastOp<T>::Do(value);
+}
+
+template <typename T,
+          typename std::enable_if<std::is_integral<T>::value && !std::is_signed<T>::value>::type * =
+              nullptr>
+constexpr T SaturatedNegWrapper(T value)
+{
+    return T(0);
+}
+
+template <typename T, typename std::enable_if<std::is_floating_point<T>::value>::type * = nullptr>
+constexpr T SaturatedNegWrapper(T value)
+{
+    return -value;
+}
+
+template <typename T, typename std::enable_if<std::is_integral<T>::value>::type * = nullptr>
+constexpr T SaturatedAbsWrapper(T value)
+{
+    // The calculation below is a static identity for unsigned types, but for
+    // signed integer types it provides a non-branching, saturated absolute value.
+    // This works because SafeUnsignedAbs() returns an unsigned type, which can
+    // represent the absolute value of all negative numbers of an equal-width
+    // integer type. The call to IsValueNegative() then detects overflow in the
+    // special case of numeric_limits<T>::min(), by evaluating the bit pattern as
+    // a signed integer value. If it is the overflow case, we end up subtracting
+    // one from the unsigned result, thus saturating to numeric_limits<T>::max().
+    return static_cast<T>(SafeUnsignedAbs(value) - IsValueNegative<T>(SafeUnsignedAbs(value)));
+}
+
+template <typename T, typename std::enable_if<std::is_floating_point<T>::value>::type * = nullptr>
+constexpr T SaturatedAbsWrapper(T value)
+{
+    return value < 0 ? -value : value;
+}
+
+template <typename T, typename U, class Enable = void>
+struct ClampedAddOp
+{};
+
+template <typename T, typename U>
+struct ClampedAddOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U y)
+    {
+        if (ClampedAddFastOp<T, U>::is_supported)
+            return ClampedAddFastOp<T, U>::template Do<V>(x, y);
+
+        static_assert(
+            std::is_same<V, result_type>::value || IsTypeInRangeForNumericType<U, V>::value,
+            "The saturation result cannot be determined from the "
+            "provided types.");
+        const V saturated = CommonMaxOrMin<V>(IsValueNegative(y));
+        V result          = {};
+        return BASE_NUMERICS_LIKELY((CheckedAddOp<T, U>::Do(x, y, &result))) ? result : saturated;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedSubOp
+{};
+
+template <typename T, typename U>
+struct ClampedSubOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U y)
+    {
+        if constexpr (ClampedSubFastOp<T, U>::is_supported)
+            return ClampedSubFastOp<T, U>::template Do<V>(x, y);
+
+        static_assert(
+            std::is_same<V, result_type>::value || IsTypeInRangeForNumericType<U, V>::value,
+            "The saturation result cannot be determined from the "
+            "provided types.");
+        const V saturated = CommonMaxOrMin<V>(!IsValueNegative(y));
+        V result          = {};
+        return BASE_NUMERICS_LIKELY((CheckedSubOp<T, U>::Do(x, y, &result))) ? result : saturated;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedMulOp
+{};
+
+template <typename T, typename U>
+struct ClampedMulOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U y)
+    {
+        if constexpr (ClampedMulFastOp<T, U>::is_supported)
+            return ClampedMulFastOp<T, U>::template Do<V>(x, y);
+
+        V result          = {};
+        const V saturated = CommonMaxOrMin<V>(IsValueNegative(x) ^ IsValueNegative(y));
+        return BASE_NUMERICS_LIKELY((CheckedMulOp<T, U>::Do(x, y, &result))) ? result : saturated;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedDivOp
+{};
+
+template <typename T, typename U>
+struct ClampedDivOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U y)
+    {
+        V result = {};
+        if (BASE_NUMERICS_LIKELY((CheckedDivOp<T, U>::Do(x, y, &result))))
+            return result;
+        // Saturation goes to max, min, or NaN (if x is zero).
+        return x ? CommonMaxOrMin<V>(IsValueNegative(x) ^ IsValueNegative(y))
+                 : SaturationDefaultLimits<V>::NaN();
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedModOp
+{};
+
+template <typename T, typename U>
+struct ClampedModOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U y)
+    {
+        V result = {};
+        return BASE_NUMERICS_LIKELY((CheckedModOp<T, U>::Do(x, y, &result))) ? result : x;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedLshOp
+{};
+
+// Left shift. Non-zero values saturate in the direction of the sign. A zero
+// shifted by any value always results in zero.
+template <typename T, typename U>
+struct ClampedLshOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = T;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U shift)
+    {
+        static_assert(!std::is_signed<U>::value, "Shift value must be unsigned.");
+        if (BASE_NUMERICS_LIKELY(shift < std::numeric_limits<T>::digits))
+        {
+            // Shift as unsigned to avoid undefined behavior.
+            V result = static_cast<V>(as_unsigned(x) << shift);
+            // If the shift can be reversed, we know it was valid.
+            if (BASE_NUMERICS_LIKELY(result >> shift == x))
+                return result;
+        }
+        return x ? CommonMaxOrMin<V>(IsValueNegative(x)) : 0;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedRshOp
+{};
+
+// Right shift. Negative values saturate to -1. Positive or 0 saturates to 0.
+template <typename T, typename U>
+struct ClampedRshOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type = T;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U shift)
+    {
+        static_assert(!std::is_signed<U>::value, "Shift value must be unsigned.");
+        // Signed right shift is odd, because it saturates to -1 or 0.
+        const V saturated = as_unsigned(V(0)) - IsValueNegative(x);
+        return BASE_NUMERICS_LIKELY(shift < IntegerBitsPlusSign<T>::value)
+                   ? saturated_cast<V>(x >> shift)
+                   : saturated;
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedAndOp
+{};
+
+template <typename T, typename U>
+struct ClampedAndOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type =
+        typename std::make_unsigned<typename MaxExponentPromotion<T, U>::type>::type;
+    template <typename V>
+    static constexpr V Do(T x, U y)
+    {
+        return static_cast<result_type>(x) & static_cast<result_type>(y);
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedOrOp
+{};
+
+// For simplicity we promote to unsigned integers.
+template <typename T, typename U>
+struct ClampedOrOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type =
+        typename std::make_unsigned<typename MaxExponentPromotion<T, U>::type>::type;
+    template <typename V>
+    static constexpr V Do(T x, U y)
+    {
+        return static_cast<result_type>(x) | static_cast<result_type>(y);
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedXorOp
+{};
+
+// For simplicity we support only unsigned integers.
+template <typename T, typename U>
+struct ClampedXorOp<
+    T,
+    U,
+    typename std::enable_if<std::is_integral<T>::value && std::is_integral<U>::value>::type>
+{
+    using result_type =
+        typename std::make_unsigned<typename MaxExponentPromotion<T, U>::type>::type;
+    template <typename V>
+    static constexpr V Do(T x, U y)
+    {
+        return static_cast<result_type>(x) ^ static_cast<result_type>(y);
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedMaxOp
+{};
+
+template <typename T, typename U>
+struct ClampedMaxOp<
+    T,
+    U,
+    typename std::enable_if<std::is_arithmetic<T>::value && std::is_arithmetic<U>::value>::type>
+{
+    using result_type = typename MaxExponentPromotion<T, U>::type;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U y)
+    {
+        return IsGreater<T, U>::Test(x, y) ? saturated_cast<V>(x) : saturated_cast<V>(y);
+    }
+};
+
+template <typename T, typename U, class Enable = void>
+struct ClampedMinOp
+{};
+
+template <typename T, typename U>
+struct ClampedMinOp<
+    T,
+    U,
+    typename std::enable_if<std::is_arithmetic<T>::value && std::is_arithmetic<U>::value>::type>
+{
+    using result_type = typename LowestValuePromotion<T, U>::type;
+    template <typename V = result_type>
+    static constexpr V Do(T x, U y)
+    {
+        return IsLess<T, U>::Test(x, y) ? saturated_cast<V>(x) : saturated_cast<V>(y);
+    }
+};
+
+// This is just boilerplate that wraps the standard floating point arithmetic.
+// A macro isn't the nicest solution, but it beats rewriting these repeatedly.
+#define BASE_FLOAT_ARITHMETIC_OPS(NAME, OP)                                                   \
+    template <typename T, typename U>                                                         \
+    struct Clamped##NAME##Op<T, U,                                                            \
+                             typename std::enable_if<std::is_floating_point<T>::value ||      \
+                                                     std::is_floating_point<U>::value>::type> \
+    {                                                                                         \
+        using result_type = typename MaxExponentPromotion<T, U>::type;                        \
+        template <typename V = result_type>                                                   \
+        static constexpr V Do(T x, U y)                                                       \
+        {                                                                                     \
+            return saturated_cast<V>(x OP y);                                                 \
+        }                                                                                     \
+    };
+
+BASE_FLOAT_ARITHMETIC_OPS(Add, +)
+BASE_FLOAT_ARITHMETIC_OPS(Sub, -)
+BASE_FLOAT_ARITHMETIC_OPS(Mul, *)
+BASE_FLOAT_ARITHMETIC_OPS(Div, /)
+
+#undef BASE_FLOAT_ARITHMETIC_OPS
+
+}  // namespace internal
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_CLAMPED_MATH_IMPL_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/math_constants.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/math_constants.h
new file mode 100644
index 0000000000..385ce3970f
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/math_constants.h
@@ -0,0 +1,20 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_MATH_CONSTANTS_H_
+#define BASE_NUMERICS_MATH_CONSTANTS_H_
+
+namespace base
+{
+
+constexpr double kPiDouble = 3.14159265358979323846;
+constexpr float kPiFloat   = 3.14159265358979323846f;
+
+// The mean acceleration due to gravity on Earth in m/s^2.
+constexpr double kMeanGravityDouble = 9.80665;
+constexpr float kMeanGravityFloat   = 9.80665f;
+
+}  // namespace base
+
+#endif  // BASE_NUMERICS_MATH_CONSTANTS_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/ranges.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/ranges.h
new file mode 100644
index 0000000000..55a5a295af
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/ranges.h
@@ -0,0 +1,39 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_RANGES_H_
+#define BASE_NUMERICS_RANGES_H_
+
+#include <algorithm>
+#include <cmath>
+
+namespace base
+{
+
+// DO NOT USE THIS FUNCTION. IT IS DUE TO BE REMOVED. https://crbug.com/1231569
+// Please use base::clamp() from base/cxx17_backports.h instead.
+//
+// This function, unlike base::clamp(), does not check if `min` is greater than
+// `max`, and returns a bogus answer if it is. Please migrate all code that
+// calls this function to use base::clamp() instead.
+//
+// If, for some reason the broken behavior is required, please re-create this
+// min/max nesting inline in the host code and explain with a comment why it
+// is needed.
+template <class T>
+constexpr const T &BrokenClampThatShouldNotBeUsed(const T &value, const T &min, const T &max)
+{
+    return std::min(std::max(value, min), max);
+}
+
+template <typename T>
+constexpr bool IsApproximatelyEqual(T lhs, T rhs, T tolerance)
+{
+    static_assert(std::is_arithmetic<T>::value, "Argument must be arithmetic");
+    return std::abs(rhs - lhs) <= tolerance;
+}
+
+}  // namespace base
+
+#endif  // BASE_NUMERICS_RANGES_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions.h
new file mode 100644
index 0000000000..3aa80c7ed0
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions.h
@@ -0,0 +1,403 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_SAFE_CONVERSIONS_H_
+#define BASE_NUMERICS_SAFE_CONVERSIONS_H_
+
+#include <stddef.h>
+
+#include <cmath>
+#include <limits>
+#include <type_traits>
+
+#include "anglebase/numerics/safe_conversions_impl.h"
+
+#if defined(__ARMEL__) && !defined(__native_client__)
+#    include "anglebase/numerics/safe_conversions_arm_impl.h"
+#    define BASE_HAS_OPTIMIZED_SAFE_CONVERSIONS (1)
+#else
+#    define BASE_HAS_OPTIMIZED_SAFE_CONVERSIONS (0)
+#endif
+
+#if !BASE_NUMERICS_DISABLE_OSTREAM_OPERATORS
+#    include <ostream>
+#endif
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+#if !BASE_HAS_OPTIMIZED_SAFE_CONVERSIONS
+template <typename Dst, typename Src>
+struct SaturateFastAsmOp
+{
+    static constexpr bool is_supported = false;
+    static constexpr Dst Do(Src)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<Dst>();
+    }
+};
+#endif  // BASE_HAS_OPTIMIZED_SAFE_CONVERSIONS
+#undef BASE_HAS_OPTIMIZED_SAFE_CONVERSIONS
+
+// The following special case a few specific integer conversions where we can
+// eke out better performance than range checking.
+template <typename Dst, typename Src, typename Enable = void>
+struct IsValueInRangeFastOp
+{
+    static constexpr bool is_supported = false;
+    static constexpr bool Do(Src value)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<bool>();
+    }
+};
+
+// Signed to signed range comparison.
+template <typename Dst, typename Src>
+struct IsValueInRangeFastOp<
+    Dst,
+    Src,
+    typename std::enable_if<std::is_integral<Dst>::value && std::is_integral<Src>::value &&
+                            std::is_signed<Dst>::value && std::is_signed<Src>::value &&
+                            !IsTypeInRangeForNumericType<Dst, Src>::value>::type>
+{
+    static constexpr bool is_supported = true;
+
+    static constexpr bool Do(Src value)
+    {
+        // Just downcast to the smaller type, sign extend it back to the original
+        // type, and then see if it matches the original value.
+        return value == static_cast<Dst>(value);
+    }
+};
+
+// Signed to unsigned range comparison.
+template <typename Dst, typename Src>
+struct IsValueInRangeFastOp<
+    Dst,
+    Src,
+    typename std::enable_if<std::is_integral<Dst>::value && std::is_integral<Src>::value &&
+                            !std::is_signed<Dst>::value && std::is_signed<Src>::value &&
+                            !IsTypeInRangeForNumericType<Dst, Src>::value>::type>
+{
+    static constexpr bool is_supported = true;
+
+    static constexpr bool Do(Src value)
+    {
+        // We cast a signed as unsigned to overflow negative values to the top,
+        // then compare against whichever maximum is smaller, as our upper bound.
+        return as_unsigned(value) <= as_unsigned(CommonMax<Src, Dst>());
+    }
+};
+
+// Convenience function that returns true if the supplied value is in range
+// for the destination type.
+template <typename Dst, typename Src>
+constexpr bool IsValueInRangeForNumericType(Src value)
+{
+    using SrcType = typename internal::UnderlyingType<Src>::type;
+    return internal::IsValueInRangeFastOp<Dst, SrcType>::is_supported
+               ? internal::IsValueInRangeFastOp<Dst, SrcType>::Do(static_cast<SrcType>(value))
+               : internal::DstRangeRelationToSrcRange<Dst>(static_cast<SrcType>(value)).IsValid();
+}
+
+// checked_cast<> is analogous to static_cast<> for numeric types,
+// except that it CHECKs that the specified numeric conversion will not
+// overflow or underflow. NaN source will always trigger a CHECK.
+template <typename Dst, class CheckHandler = internal::CheckOnFailure, typename Src>
+constexpr Dst checked_cast(Src value)
+{
+    // This throws a compile-time error on evaluating the constexpr if it can be
+    // determined at compile-time as failing, otherwise it will CHECK at runtime.
+    using SrcType = typename internal::UnderlyingType<Src>::type;
+    return BASE_NUMERICS_LIKELY((IsValueInRangeForNumericType<Dst>(value)))
+               ? static_cast<Dst>(static_cast<SrcType>(value))
+               : CheckHandler::template HandleFailure<Dst>();
+}
+
+// Default boundaries for integral/float: max/infinity, lowest/-infinity, 0/NaN.
+// You may provide your own limits (e.g. to saturated_cast) so long as you
+// implement all of the static constexpr member functions in the class below.
+template <typename T>
+struct SaturationDefaultLimits : public std::numeric_limits<T>
+{
+    static constexpr T NaN()
+    {
+        return std::numeric_limits<T>::has_quiet_NaN ? std::numeric_limits<T>::quiet_NaN() : T();
+    }
+    using std::numeric_limits<T>::max;
+    static constexpr T Overflow()
+    {
+        return std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity()
+                                                    : std::numeric_limits<T>::max();
+    }
+    using std::numeric_limits<T>::lowest;
+    static constexpr T Underflow()
+    {
+        return std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity() * -1
+                                                    : std::numeric_limits<T>::lowest();
+    }
+};
+
+template <typename Dst, template <typename> class S, typename Src>
+constexpr Dst saturated_cast_impl(Src value, RangeCheck constraint)
+{
+    // For some reason clang generates much better code when the branch is
+    // structured exactly this way, rather than a sequence of checks.
+    return !constraint.IsOverflowFlagSet()
+               ? (!constraint.IsUnderflowFlagSet() ? static_cast<Dst>(value) : S<Dst>::Underflow())
+               // Skip this check for integral Src, which cannot be NaN.
+               : (std::is_integral<Src>::value || !constraint.IsUnderflowFlagSet()
+                      ? S<Dst>::Overflow()
+                      : S<Dst>::NaN());
+}
+
+// We can reduce the number of conditions and get slightly better performance
+// for normal signed and unsigned integer ranges. And in the specific case of
+// Arm, we can use the optimized saturation instructions.
+template <typename Dst, typename Src, typename Enable = void>
+struct SaturateFastOp
+{
+    static constexpr bool is_supported = false;
+    static constexpr Dst Do(Src value)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<Dst>();
+    }
+};
+
+template <typename Dst, typename Src>
+struct SaturateFastOp<
+    Dst,
+    Src,
+    typename std::enable_if<std::is_integral<Src>::value && std::is_integral<Dst>::value &&
+                            SaturateFastAsmOp<Dst, Src>::is_supported>::type>
+{
+    static constexpr bool is_supported = true;
+    static constexpr Dst Do(Src value) { return SaturateFastAsmOp<Dst, Src>::Do(value); }
+};
+
+template <typename Dst, typename Src>
+struct SaturateFastOp<
+    Dst,
+    Src,
+    typename std::enable_if<std::is_integral<Src>::value && std::is_integral<Dst>::value &&
+                            !SaturateFastAsmOp<Dst, Src>::is_supported>::type>
+{
+    static constexpr bool is_supported = true;
+    static constexpr Dst Do(Src value)
+    {
+        // The exact order of the following is structured to hit the correct
+        // optimization heuristics across compilers. Do not change without
+        // checking the emitted code.
+        const Dst saturated = CommonMaxOrMin<Dst, Src>(
+            IsMaxInRangeForNumericType<Dst, Src>() ||
+            (!IsMinInRangeForNumericType<Dst, Src>() && IsValueNegative(value)));
+        return BASE_NUMERICS_LIKELY(IsValueInRangeForNumericType<Dst>(value))
+                   ? static_cast<Dst>(value)
+                   : saturated;
+    }
+};
+
+// saturated_cast<> is analogous to static_cast<> for numeric types, except
+// that the specified numeric conversion will saturate by default rather than
+// overflow or underflow, and NaN assignment to an integral will return 0.
+// All boundary condition behaviors can be overriden with a custom handler.
+template <typename Dst,
+          template <typename> class SaturationHandler = SaturationDefaultLimits,
+          typename Src>
+constexpr Dst saturated_cast(Src value)
+{
+    using SrcType = typename UnderlyingType<Src>::type;
+    return !IsCompileTimeConstant(value) && SaturateFastOp<Dst, SrcType>::is_supported &&
+                   std::is_same<SaturationHandler<Dst>, SaturationDefaultLimits<Dst>>::value
+               ? SaturateFastOp<Dst, SrcType>::Do(static_cast<SrcType>(value))
+               : saturated_cast_impl<Dst, SaturationHandler, SrcType>(
+                     static_cast<SrcType>(value),
+                     DstRangeRelationToSrcRange<Dst, SaturationHandler, SrcType>(
+                         static_cast<SrcType>(value)));
+}
+
+// strict_cast<> is analogous to static_cast<> for numeric types, except that
+// it will cause a compile failure if the destination type is not large enough
+// to contain any value in the source type. It performs no runtime checking.
+template <typename Dst, typename Src>
+constexpr Dst strict_cast(Src value)
+{
+    using SrcType = typename UnderlyingType<Src>::type;
+    static_assert(UnderlyingType<Src>::is_numeric, "Argument must be numeric.");
+    static_assert(std::is_arithmetic<Dst>::value, "Result must be numeric.");
+
+    // If you got here from a compiler error, it's because you tried to assign
+    // from a source type to a destination type that has insufficient range.
+    // The solution may be to change the destination type you're assigning to,
+    // and use one large enough to represent the source.
+    // Alternatively, you may be better served with the checked_cast<> or
+    // saturated_cast<> template functions for your particular use case.
+    static_assert(StaticDstRangeRelationToSrcRange<Dst, SrcType>::value == NUMERIC_RANGE_CONTAINED,
+                  "The source type is out of range for the destination type. "
+                  "Please see strict_cast<> comments for more information.");
+
+    return static_cast<Dst>(static_cast<SrcType>(value));
+}
+
+// Some wrappers to statically check that a type is in range.
+template <typename Dst, typename Src, class Enable = void>
+struct IsNumericRangeContained
+{
+    static constexpr bool value = false;
+};
+
+template <typename Dst, typename Src>
+struct IsNumericRangeContained<
+    Dst,
+    Src,
+    typename std::enable_if<ArithmeticOrUnderlyingEnum<Dst>::value &&
+                            ArithmeticOrUnderlyingEnum<Src>::value>::type>
+{
+    static constexpr bool value =
+        StaticDstRangeRelationToSrcRange<Dst, Src>::value == NUMERIC_RANGE_CONTAINED;
+};
+
+// StrictNumeric implements compile time range checking between numeric types by
+// wrapping assignment operations in a strict_cast. This class is intended to be
+// used for function arguments and return types, to ensure the destination type
+// can always contain the source type. This is essentially the same as enforcing
+// -Wconversion in gcc and C4302 warnings on MSVC, but it can be applied
+// incrementally at API boundaries, making it easier to convert code so that it
+// compiles cleanly with truncation warnings enabled.
+// This template should introduce no runtime overhead, but it also provides no
+// runtime checking of any of the associated mathematical operations. Use
+// CheckedNumeric for runtime range checks of the actual value being assigned.
+template <typename T>
+class StrictNumeric
+{
+  public:
+    using type = T;
+
+    constexpr StrictNumeric() : value_(0) {}
+
+    // Copy constructor.
+    template <typename Src>
+    constexpr StrictNumeric(const StrictNumeric<Src> &rhs) : value_(strict_cast<T>(rhs.value_))
+    {}
+
+    // This is not an explicit constructor because we implicitly upgrade regular
+    // numerics to StrictNumerics to make them easier to use.
+    template <typename Src>
+    constexpr StrictNumeric(Src value)  // NOLINT(runtime/explicit)
+        : value_(strict_cast<T>(value))
+    {}
+
+    // If you got here from a compiler error, it's because you tried to assign
+    // from a source type to a destination type that has insufficient range.
+    // The solution may be to change the destination type you're assigning to,
+    // and use one large enough to represent the source.
+    // If you're assigning from a CheckedNumeric<> class, you may be able to use
+    // the AssignIfValid() member function, specify a narrower destination type to
+    // the member value functions (e.g. val.template ValueOrDie<Dst>()), use one
+    // of the value helper functions (e.g. ValueOrDieForType<Dst>(val)).
+    // If you've encountered an _ambiguous overload_ you can use a static_cast<>
+    // to explicitly cast the result to the destination type.
+    // If none of that works, you may be better served with the checked_cast<> or
+    // saturated_cast<> template functions for your particular use case.
+    template <typename Dst,
+              typename std::enable_if<IsNumericRangeContained<Dst, T>::value>::type * = nullptr>
+    constexpr operator Dst() const
+    {
+        return static_cast<typename ArithmeticOrUnderlyingEnum<Dst>::type>(value_);
+    }
+
+  private:
+    const T value_;
+};
+
+// Convience wrapper returns a StrictNumeric from the provided arithmetic type.
+template <typename T>
+constexpr StrictNumeric<typename UnderlyingType<T>::type> MakeStrictNum(const T value)
+{
+    return value;
+}
+
+#if !BASE_NUMERICS_DISABLE_OSTREAM_OPERATORS
+// Overload the ostream output operator to make logging work nicely.
+template <typename T>
+std::ostream &operator<<(std::ostream &os, const StrictNumeric<T> &value)
+{
+    os << static_cast<T>(value);
+    return os;
+}
+#endif
+
+#define BASE_NUMERIC_COMPARISON_OPERATORS(CLASS, NAME, OP)                                     \
+    template <typename L, typename R,                                                          \
+              typename std::enable_if<internal::Is##CLASS##Op<L, R>::value>::type * = nullptr> \
+    constexpr bool operator OP(const L lhs, const R rhs)                                       \
+    {                                                                                          \
+        return SafeCompare<NAME, typename UnderlyingType<L>::type,                             \
+                           typename UnderlyingType<R>::type>(lhs, rhs);                        \
+    }
+
+BASE_NUMERIC_COMPARISON_OPERATORS(Strict, IsLess, <)
+BASE_NUMERIC_COMPARISON_OPERATORS(Strict, IsLessOrEqual, <=)
+BASE_NUMERIC_COMPARISON_OPERATORS(Strict, IsGreater, >)
+BASE_NUMERIC_COMPARISON_OPERATORS(Strict, IsGreaterOrEqual, >=)
+BASE_NUMERIC_COMPARISON_OPERATORS(Strict, IsEqual, ==)
+BASE_NUMERIC_COMPARISON_OPERATORS(Strict, IsNotEqual, !=)
+
+}  // namespace internal
+
+using internal::as_signed;
+using internal::as_unsigned;
+using internal::checked_cast;
+using internal::IsTypeInRangeForNumericType;
+using internal::IsValueInRangeForNumericType;
+using internal::IsValueNegative;
+using internal::MakeStrictNum;
+using internal::SafeUnsignedAbs;
+using internal::saturated_cast;
+using internal::strict_cast;
+using internal::StrictNumeric;
+
+// Explicitly make a shorter size_t alias for convenience.
+using SizeT = StrictNumeric<size_t>;
+
+// floating -> integral conversions that saturate and thus can actually return
+// an integral type.  In most cases, these should be preferred over the std::
+// versions.
+template <
+    typename Dst = int,
+    typename Src,
+    typename = std::enable_if_t<std::is_integral<Dst>::value && std::is_floating_point<Src>::value>>
+Dst ClampFloor(Src value)
+{
+    return saturated_cast<Dst>(std::floor(value));
+}
+template <
+    typename Dst = int,
+    typename Src,
+    typename = std::enable_if_t<std::is_integral<Dst>::value && std::is_floating_point<Src>::value>>
+Dst ClampCeil(Src value)
+{
+    return saturated_cast<Dst>(std::ceil(value));
+}
+template <
+    typename Dst = int,
+    typename Src,
+    typename = std::enable_if_t<std::is_integral<Dst>::value && std::is_floating_point<Src>::value>>
+Dst ClampRound(Src value)
+{
+    const Src rounded = (value >= 0.0f) ? std::floor(value + 0.5f) : std::ceil(value - 0.5f);
+    return saturated_cast<Dst>(rounded);
+}
+
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_SAFE_CONVERSIONS_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions_arm_impl.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions_arm_impl.h
new file mode 100644
index 0000000000..74e5bcc0c6
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions_arm_impl.h
@@ -0,0 +1,60 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_SAFE_CONVERSIONS_ARM_IMPL_H_
+#define BASE_NUMERICS_SAFE_CONVERSIONS_ARM_IMPL_H_
+
+#include <cassert>
+#include <limits>
+#include <type_traits>
+
+#include "anglebase/numerics/safe_conversions_impl.h"
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+// Fast saturation to a destination type.
+template <typename Dst, typename Src>
+struct SaturateFastAsmOp
+{
+    static constexpr bool is_supported =
+        std::is_signed<Src>::value && std::is_integral<Dst>::value &&
+        std::is_integral<Src>::value &&
+        IntegerBitsPlusSign<Src>::value <= IntegerBitsPlusSign<int32_t>::value &&
+        IntegerBitsPlusSign<Dst>::value <= IntegerBitsPlusSign<int32_t>::value &&
+        !IsTypeInRangeForNumericType<Dst, Src>::value;
+
+    __attribute__((always_inline)) static Dst Do(Src value)
+    {
+        int32_t src = value;
+        typename std::conditional<std::is_signed<Dst>::value, int32_t, uint32_t>::type result;
+        if (std::is_signed<Dst>::value)
+        {
+            asm("ssat %[dst], %[shift], %[src]"
+                : [dst] "=r"(result)
+                : [src] "r"(src), [shift] "n"(IntegerBitsPlusSign<Dst>::value <= 32
+                                                  ? IntegerBitsPlusSign<Dst>::value
+                                                  : 32));
+        }
+        else
+        {
+            asm("usat %[dst], %[shift], %[src]"
+                : [dst] "=r"(result)
+                : [src] "r"(src), [shift] "n"(IntegerBitsPlusSign<Dst>::value < 32
+                                                  ? IntegerBitsPlusSign<Dst>::value
+                                                  : 31));
+        }
+        return static_cast<Dst>(result);
+    }
+};
+
+}  // namespace internal
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_SAFE_CONVERSIONS_ARM_IMPL_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions_impl.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions_impl.h
new file mode 100644
index 0000000000..7d0f031754
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_conversions_impl.h
@@ -0,0 +1,893 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_SAFE_CONVERSIONS_IMPL_H_
+#define BASE_NUMERICS_SAFE_CONVERSIONS_IMPL_H_
+
+#include <stdint.h>
+
+#include <limits>
+#include <type_traits>
+
+#if defined(__GNUC__) || defined(__clang__)
+#    define BASE_NUMERICS_LIKELY(x) __builtin_expect(!!(x), 1)
+#    define BASE_NUMERICS_UNLIKELY(x) __builtin_expect(!!(x), 0)
+#else
+#    define BASE_NUMERICS_LIKELY(x) (x)
+#    define BASE_NUMERICS_UNLIKELY(x) (x)
+#endif
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+// The std library doesn't provide a binary max_exponent for integers, however
+// we can compute an analog using std::numeric_limits<>::digits.
+template <typename NumericType>
+struct MaxExponent
+{
+    static const int value = std::is_floating_point<NumericType>::value
+                                 ? std::numeric_limits<NumericType>::max_exponent
+                                 : std::numeric_limits<NumericType>::digits + 1;
+};
+
+// The number of bits (including the sign) in an integer. Eliminates sizeof
+// hacks.
+template <typename NumericType>
+struct IntegerBitsPlusSign
+{
+    static const int value =
+        std::numeric_limits<NumericType>::digits + std::is_signed<NumericType>::value;
+};
+
+// Helper templates for integer manipulations.
+
+template <typename Integer>
+struct PositionOfSignBit
+{
+    static const size_t value = IntegerBitsPlusSign<Integer>::value - 1;
+};
+
+// Determines if a numeric value is negative without throwing compiler
+// warnings on: unsigned(value) < 0.
+template <typename T, typename std::enable_if<std::is_signed<T>::value>::type * = nullptr>
+constexpr bool IsValueNegative(T value)
+{
+    static_assert(std::is_arithmetic<T>::value, "Argument must be numeric.");
+    return value < 0;
+}
+
+template <typename T, typename std::enable_if<!std::is_signed<T>::value>::type * = nullptr>
+constexpr bool IsValueNegative(T)
+{
+    static_assert(std::is_arithmetic<T>::value, "Argument must be numeric.");
+    return false;
+}
+
+// This performs a fast negation, returning a signed value. It works on unsigned
+// arguments, but probably doesn't do what you want for any unsigned value
+// larger than max / 2 + 1 (i.e. signed min cast to unsigned).
+template <typename T>
+constexpr typename std::make_signed<T>::type ConditionalNegate(T x, bool is_negative)
+{
+    static_assert(std::is_integral<T>::value, "Type must be integral");
+    using SignedT   = typename std::make_signed<T>::type;
+    using UnsignedT = typename std::make_unsigned<T>::type;
+    return static_cast<SignedT>((static_cast<UnsignedT>(x) ^ -SignedT(is_negative)) + is_negative);
+}
+
+// This performs a safe, absolute value via unsigned overflow.
+template <typename T>
+constexpr typename std::make_unsigned<T>::type SafeUnsignedAbs(T value)
+{
+    static_assert(std::is_integral<T>::value, "Type must be integral");
+    using UnsignedT = typename std::make_unsigned<T>::type;
+    return IsValueNegative(value) ? static_cast<UnsignedT>(0u - static_cast<UnsignedT>(value))
+                                  : static_cast<UnsignedT>(value);
+}
+
+// This allows us to switch paths on known compile-time constants.
+#if defined(__clang__) || defined(__GNUC__)
+constexpr bool CanDetectCompileTimeConstant()
+{
+    return true;
+}
+template <typename T>
+constexpr bool IsCompileTimeConstant(const T v)
+{
+    return __builtin_constant_p(v);
+}
+#else
+constexpr bool CanDetectCompileTimeConstant()
+{
+    return false;
+}
+template <typename T>
+constexpr bool IsCompileTimeConstant(const T)
+{
+    return false;
+}
+#endif
+template <typename T>
+constexpr bool MustTreatAsConstexpr(const T v)
+{
+    // Either we can't detect a compile-time constant, and must always use the
+    // constexpr path, or we know we have a compile-time constant.
+    return !CanDetectCompileTimeConstant() || IsCompileTimeConstant(v);
+}
+
+// Forces a crash, like a CHECK(false). Used for numeric boundary errors.
+// Also used in a constexpr template to trigger a compilation failure on
+// an error condition.
+struct CheckOnFailure
+{
+    template <typename T>
+    static T HandleFailure()
+    {
+#if defined(_MSC_VER)
+        __debugbreak();
+#elif defined(__GNUC__) || defined(__clang__)
+        __builtin_trap();
+#else
+        ((void)(*(volatile char *)0 = 0));
+#endif
+        return T();
+    }
+};
+
+enum IntegerRepresentation
+{
+    INTEGER_REPRESENTATION_UNSIGNED,
+    INTEGER_REPRESENTATION_SIGNED
+};
+
+// A range for a given nunmeric Src type is contained for a given numeric Dst
+// type if both numeric_limits<Src>::max() <= numeric_limits<Dst>::max() and
+// numeric_limits<Src>::lowest() >= numeric_limits<Dst>::lowest() are true.
+// We implement this as template specializations rather than simple static
+// comparisons to ensure type correctness in our comparisons.
+enum NumericRangeRepresentation
+{
+    NUMERIC_RANGE_NOT_CONTAINED,
+    NUMERIC_RANGE_CONTAINED
+};
+
+// Helper templates to statically determine if our destination type can contain
+// maximum and minimum values represented by the source type.
+
+template <
+    typename Dst,
+    typename Src,
+    IntegerRepresentation DstSign = std::is_signed<Dst>::value ? INTEGER_REPRESENTATION_SIGNED
+                                                               : INTEGER_REPRESENTATION_UNSIGNED,
+    IntegerRepresentation SrcSign = std::is_signed<Src>::value ? INTEGER_REPRESENTATION_SIGNED
+                                                               : INTEGER_REPRESENTATION_UNSIGNED>
+struct StaticDstRangeRelationToSrcRange;
+
+// Same sign: Dst is guaranteed to contain Src only if its range is equal or
+// larger.
+template <typename Dst, typename Src, IntegerRepresentation Sign>
+struct StaticDstRangeRelationToSrcRange<Dst, Src, Sign, Sign>
+{
+    static const NumericRangeRepresentation value =
+        MaxExponent<Dst>::value >= MaxExponent<Src>::value ? NUMERIC_RANGE_CONTAINED
+                                                           : NUMERIC_RANGE_NOT_CONTAINED;
+};
+
+// Unsigned to signed: Dst is guaranteed to contain source only if its range is
+// larger.
+template <typename Dst, typename Src>
+struct StaticDstRangeRelationToSrcRange<Dst,
+                                        Src,
+                                        INTEGER_REPRESENTATION_SIGNED,
+                                        INTEGER_REPRESENTATION_UNSIGNED>
+{
+    static const NumericRangeRepresentation value =
+        MaxExponent<Dst>::value > MaxExponent<Src>::value ? NUMERIC_RANGE_CONTAINED
+                                                          : NUMERIC_RANGE_NOT_CONTAINED;
+};
+
+// Signed to unsigned: Dst cannot be statically determined to contain Src.
+template <typename Dst, typename Src>
+struct StaticDstRangeRelationToSrcRange<Dst,
+                                        Src,
+                                        INTEGER_REPRESENTATION_UNSIGNED,
+                                        INTEGER_REPRESENTATION_SIGNED>
+{
+    static const NumericRangeRepresentation value = NUMERIC_RANGE_NOT_CONTAINED;
+};
+
+// This class wraps the range constraints as separate booleans so the compiler
+// can identify constants and eliminate unused code paths.
+class RangeCheck
+{
+  public:
+    constexpr RangeCheck(bool is_in_lower_bound, bool is_in_upper_bound)
+        : is_underflow_(!is_in_lower_bound), is_overflow_(!is_in_upper_bound)
+    {}
+    constexpr RangeCheck() : is_underflow_(0), is_overflow_(0) {}
+    constexpr bool IsValid() const { return !is_overflow_ && !is_underflow_; }
+    constexpr bool IsInvalid() const { return is_overflow_ && is_underflow_; }
+    constexpr bool IsOverflow() const { return is_overflow_ && !is_underflow_; }
+    constexpr bool IsUnderflow() const { return !is_overflow_ && is_underflow_; }
+    constexpr bool IsOverflowFlagSet() const { return is_overflow_; }
+    constexpr bool IsUnderflowFlagSet() const { return is_underflow_; }
+    constexpr bool operator==(const RangeCheck rhs) const
+    {
+        return is_underflow_ == rhs.is_underflow_ && is_overflow_ == rhs.is_overflow_;
+    }
+    constexpr bool operator!=(const RangeCheck rhs) const { return !(*this == rhs); }
+
+  private:
+    // Do not change the order of these member variables. The integral conversion
+    // optimization depends on this exact order.
+    const bool is_underflow_;
+    const bool is_overflow_;
+};
+
+// The following helper template addresses a corner case in range checks for
+// conversion from a floating-point type to an integral type of smaller range
+// but larger precision (e.g. float -> unsigned). The problem is as follows:
+//   1. Integral maximum is always one less than a power of two, so it must be
+//      truncated to fit the mantissa of the floating point. The direction of
+//      rounding is implementation defined, but by default it's always IEEE
+//      floats, which round to nearest and thus result in a value of larger
+//      magnitude than the integral value.
+//      Example: float f = UINT_MAX; // f is 4294967296f but UINT_MAX
+//                                   // is 4294967295u.
+//   2. If the floating point value is equal to the promoted integral maximum
+//      value, a range check will erroneously pass.
+//      Example: (4294967296f <= 4294967295u) // This is true due to a precision
+//                                            // loss in rounding up to float.
+//   3. When the floating point value is then converted to an integral, the
+//      resulting value is out of range for the target integral type and
+//      thus is implementation defined.
+//      Example: unsigned u = (float)INT_MAX; // u will typically overflow to 0.
+// To fix this bug we manually truncate the maximum value when the destination
+// type is an integral of larger precision than the source floating-point type,
+// such that the resulting maximum is represented exactly as a floating point.
+template <typename Dst, typename Src, template <typename> class Bounds>
+struct NarrowingRange
+{
+    using SrcLimits = std::numeric_limits<Src>;
+    using DstLimits = typename std::numeric_limits<Dst>;
+
+    // Computes the mask required to make an accurate comparison between types.
+    static const int kShift =
+        (MaxExponent<Src>::value > MaxExponent<Dst>::value && SrcLimits::digits < DstLimits::digits)
+            ? (DstLimits::digits - SrcLimits::digits)
+            : 0;
+    template <typename T, typename std::enable_if<std::is_integral<T>::value>::type * = nullptr>
+
+    // Masks out the integer bits that are beyond the precision of the
+    // intermediate type used for comparison.
+    static constexpr T Adjust(T value)
+    {
+        static_assert(std::is_same<T, Dst>::value, "");
+        static_assert(kShift < DstLimits::digits, "");
+        return static_cast<T>(ConditionalNegate(SafeUnsignedAbs(value) & ~((T(1) << kShift) - T(1)),
+                                                IsValueNegative(value)));
+    }
+
+    template <typename T,
+              typename std::enable_if<std::is_floating_point<T>::value>::type * = nullptr>
+    static constexpr T Adjust(T value)
+    {
+        static_assert(std::is_same<T, Dst>::value, "");
+        static_assert(kShift == 0, "");
+        return value;
+    }
+
+    static constexpr Dst max() { return Adjust(Bounds<Dst>::max()); }
+    static constexpr Dst lowest() { return Adjust(Bounds<Dst>::lowest()); }
+};
+
+template <
+    typename Dst,
+    typename Src,
+    template <typename>
+    class Bounds,
+    IntegerRepresentation DstSign = std::is_signed<Dst>::value ? INTEGER_REPRESENTATION_SIGNED
+                                                               : INTEGER_REPRESENTATION_UNSIGNED,
+    IntegerRepresentation SrcSign = std::is_signed<Src>::value ? INTEGER_REPRESENTATION_SIGNED
+                                                               : INTEGER_REPRESENTATION_UNSIGNED,
+    NumericRangeRepresentation DstRange = StaticDstRangeRelationToSrcRange<Dst, Src>::value>
+struct DstRangeRelationToSrcRangeImpl;
+
+// The following templates are for ranges that must be verified at runtime. We
+// split it into checks based on signedness to avoid confusing casts and
+// compiler warnings on signed an unsigned comparisons.
+
+// Same sign narrowing: The range is contained for normal limits.
+template <typename Dst,
+          typename Src,
+          template <typename>
+          class Bounds,
+          IntegerRepresentation DstSign,
+          IntegerRepresentation SrcSign>
+struct DstRangeRelationToSrcRangeImpl<Dst, Src, Bounds, DstSign, SrcSign, NUMERIC_RANGE_CONTAINED>
+{
+    static constexpr RangeCheck Check(Src value)
+    {
+        using SrcLimits = std::numeric_limits<Src>;
+        using DstLimits = NarrowingRange<Dst, Src, Bounds>;
+        return RangeCheck(static_cast<Dst>(SrcLimits::lowest()) >= DstLimits::lowest() ||
+                              static_cast<Dst>(value) >= DstLimits::lowest(),
+                          static_cast<Dst>(SrcLimits::max()) <= DstLimits::max() ||
+                              static_cast<Dst>(value) <= DstLimits::max());
+    }
+};
+
+// Signed to signed narrowing: Both the upper and lower boundaries may be
+// exceeded for standard limits.
+template <typename Dst, typename Src, template <typename> class Bounds>
+struct DstRangeRelationToSrcRangeImpl<Dst,
+                                      Src,
+                                      Bounds,
+                                      INTEGER_REPRESENTATION_SIGNED,
+                                      INTEGER_REPRESENTATION_SIGNED,
+                                      NUMERIC_RANGE_NOT_CONTAINED>
+{
+    static constexpr RangeCheck Check(Src value)
+    {
+        using DstLimits = NarrowingRange<Dst, Src, Bounds>;
+        return RangeCheck(value >= DstLimits::lowest(), value <= DstLimits::max());
+    }
+};
+
+// Unsigned to unsigned narrowing: Only the upper bound can be exceeded for
+// standard limits.
+template <typename Dst, typename Src, template <typename> class Bounds>
+struct DstRangeRelationToSrcRangeImpl<Dst,
+                                      Src,
+                                      Bounds,
+                                      INTEGER_REPRESENTATION_UNSIGNED,
+                                      INTEGER_REPRESENTATION_UNSIGNED,
+                                      NUMERIC_RANGE_NOT_CONTAINED>
+{
+    static constexpr RangeCheck Check(Src value)
+    {
+        using DstLimits = NarrowingRange<Dst, Src, Bounds>;
+        return RangeCheck(DstLimits::lowest() == Dst(0) || value >= DstLimits::lowest(),
+                          value <= DstLimits::max());
+    }
+};
+
+// Unsigned to signed: Only the upper bound can be exceeded for standard limits.
+template <typename Dst, typename Src, template <typename> class Bounds>
+struct DstRangeRelationToSrcRangeImpl<Dst,
+                                      Src,
+                                      Bounds,
+                                      INTEGER_REPRESENTATION_SIGNED,
+                                      INTEGER_REPRESENTATION_UNSIGNED,
+                                      NUMERIC_RANGE_NOT_CONTAINED>
+{
+    static constexpr RangeCheck Check(Src value)
+    {
+        using DstLimits = NarrowingRange<Dst, Src, Bounds>;
+        using Promotion = decltype(Src() + Dst());
+        return RangeCheck(
+            DstLimits::lowest() <= Dst(0) ||
+                static_cast<Promotion>(value) >= static_cast<Promotion>(DstLimits::lowest()),
+            static_cast<Promotion>(value) <= static_cast<Promotion>(DstLimits::max()));
+    }
+};
+
+// Signed to unsigned: The upper boundary may be exceeded for a narrower Dst,
+// and any negative value exceeds the lower boundary for standard limits.
+template <typename Dst, typename Src, template <typename> class Bounds>
+struct DstRangeRelationToSrcRangeImpl<Dst,
+                                      Src,
+                                      Bounds,
+                                      INTEGER_REPRESENTATION_UNSIGNED,
+                                      INTEGER_REPRESENTATION_SIGNED,
+                                      NUMERIC_RANGE_NOT_CONTAINED>
+{
+    static constexpr RangeCheck Check(Src value)
+    {
+        using SrcLimits = std::numeric_limits<Src>;
+        using DstLimits = NarrowingRange<Dst, Src, Bounds>;
+        using Promotion = decltype(Src() + Dst());
+        bool ge_zero    = false;
+        // Converting floating-point to integer will discard fractional part, so
+        // values in (-1.0, -0.0) will truncate to 0 and fit in Dst.
+        if (std::is_floating_point<Src>::value)
+        {
+            ge_zero = value > Src(-1);
+        }
+        else
+        {
+            ge_zero = value >= Src(0);
+        }
+        return RangeCheck(
+            ge_zero && (DstLimits::lowest() == 0 || static_cast<Dst>(value) >= DstLimits::lowest()),
+            static_cast<Promotion>(SrcLimits::max()) <= static_cast<Promotion>(DstLimits::max()) ||
+                static_cast<Promotion>(value) <= static_cast<Promotion>(DstLimits::max()));
+    }
+};
+
+// Simple wrapper for statically checking if a type's range is contained.
+template <typename Dst, typename Src>
+struct IsTypeInRangeForNumericType
+{
+    static const bool value =
+        StaticDstRangeRelationToSrcRange<Dst, Src>::value == NUMERIC_RANGE_CONTAINED;
+};
+
+template <typename Dst, template <typename> class Bounds = std::numeric_limits, typename Src>
+constexpr RangeCheck DstRangeRelationToSrcRange(Src value)
+{
+    static_assert(std::is_arithmetic<Src>::value, "Argument must be numeric.");
+    static_assert(std::is_arithmetic<Dst>::value, "Result must be numeric.");
+    static_assert(Bounds<Dst>::lowest() < Bounds<Dst>::max(), "");
+    return DstRangeRelationToSrcRangeImpl<Dst, Src, Bounds>::Check(value);
+}
+
+// Integer promotion templates used by the portable checked integer arithmetic.
+template <size_t Size, bool IsSigned>
+struct IntegerForDigitsAndSign;
+
+#define INTEGER_FOR_DIGITS_AND_SIGN(I)                                                      \
+    template <>                                                                             \
+    struct IntegerForDigitsAndSign<IntegerBitsPlusSign<I>::value, std::is_signed<I>::value> \
+    {                                                                                       \
+        using type = I;                                                                     \
+    }
+
+INTEGER_FOR_DIGITS_AND_SIGN(int8_t);
+INTEGER_FOR_DIGITS_AND_SIGN(uint8_t);
+INTEGER_FOR_DIGITS_AND_SIGN(int16_t);
+INTEGER_FOR_DIGITS_AND_SIGN(uint16_t);
+INTEGER_FOR_DIGITS_AND_SIGN(int32_t);
+INTEGER_FOR_DIGITS_AND_SIGN(uint32_t);
+INTEGER_FOR_DIGITS_AND_SIGN(int64_t);
+INTEGER_FOR_DIGITS_AND_SIGN(uint64_t);
+#undef INTEGER_FOR_DIGITS_AND_SIGN
+
+// WARNING: We have no IntegerForSizeAndSign<16, *>. If we ever add one to
+// support 128-bit math, then the ArithmeticPromotion template below will need
+// to be updated (or more likely replaced with a decltype expression).
+static_assert(IntegerBitsPlusSign<intmax_t>::value == 64,
+              "Max integer size not supported for this toolchain.");
+
+template <typename Integer, bool IsSigned = std::is_signed<Integer>::value>
+struct TwiceWiderInteger
+{
+    using type =
+        typename IntegerForDigitsAndSign<IntegerBitsPlusSign<Integer>::value * 2, IsSigned>::type;
+};
+
+enum ArithmeticPromotionCategory
+{
+    LEFT_PROMOTION,  // Use the type of the left-hand argument.
+    RIGHT_PROMOTION  // Use the type of the right-hand argument.
+};
+
+// Determines the type that can represent the largest positive value.
+template <typename Lhs,
+          typename Rhs,
+          ArithmeticPromotionCategory Promotion =
+              (MaxExponent<Lhs>::value > MaxExponent<Rhs>::value) ? LEFT_PROMOTION
+                                                                  : RIGHT_PROMOTION>
+struct MaxExponentPromotion;
+
+template <typename Lhs, typename Rhs>
+struct MaxExponentPromotion<Lhs, Rhs, LEFT_PROMOTION>
+{
+    using type = Lhs;
+};
+
+template <typename Lhs, typename Rhs>
+struct MaxExponentPromotion<Lhs, Rhs, RIGHT_PROMOTION>
+{
+    using type = Rhs;
+};
+
+// Determines the type that can represent the lowest arithmetic value.
+template <typename Lhs,
+          typename Rhs,
+          ArithmeticPromotionCategory Promotion =
+              std::is_signed<Lhs>::value
+                  ? (std::is_signed<Rhs>::value
+                         ? (MaxExponent<Lhs>::value > MaxExponent<Rhs>::value ? LEFT_PROMOTION
+                                                                              : RIGHT_PROMOTION)
+                         : LEFT_PROMOTION)
+                  : (std::is_signed<Rhs>::value
+                         ? RIGHT_PROMOTION
+                         : (MaxExponent<Lhs>::value < MaxExponent<Rhs>::value ? LEFT_PROMOTION
+                                                                              : RIGHT_PROMOTION))>
+struct LowestValuePromotion;
+
+template <typename Lhs, typename Rhs>
+struct LowestValuePromotion<Lhs, Rhs, LEFT_PROMOTION>
+{
+    using type = Lhs;
+};
+
+template <typename Lhs, typename Rhs>
+struct LowestValuePromotion<Lhs, Rhs, RIGHT_PROMOTION>
+{
+    using type = Rhs;
+};
+
+// Determines the type that is best able to represent an arithmetic result.
+template <typename Lhs,
+          typename Rhs = Lhs,
+          bool is_intmax_type =
+              std::is_integral<typename MaxExponentPromotion<Lhs, Rhs>::type>::value
+                  &&IntegerBitsPlusSign<typename MaxExponentPromotion<Lhs, Rhs>::type>::value ==
+              IntegerBitsPlusSign<intmax_t>::value,
+          bool is_max_exponent =
+              StaticDstRangeRelationToSrcRange<typename MaxExponentPromotion<Lhs, Rhs>::type,
+                                               Lhs>::value ==
+              NUMERIC_RANGE_CONTAINED
+                  &&StaticDstRangeRelationToSrcRange<typename MaxExponentPromotion<Lhs, Rhs>::type,
+                                                     Rhs>::value == NUMERIC_RANGE_CONTAINED>
+struct BigEnoughPromotion;
+
+// The side with the max exponent is big enough.
+template <typename Lhs, typename Rhs, bool is_intmax_type>
+struct BigEnoughPromotion<Lhs, Rhs, is_intmax_type, true>
+{
+    using type                     = typename MaxExponentPromotion<Lhs, Rhs>::type;
+    static const bool is_contained = true;
+};
+
+// We can use a twice wider type to fit.
+template <typename Lhs, typename Rhs>
+struct BigEnoughPromotion<Lhs, Rhs, false, false>
+{
+    using type =
+        typename TwiceWiderInteger<typename MaxExponentPromotion<Lhs, Rhs>::type,
+                                   std::is_signed<Lhs>::value || std::is_signed<Rhs>::value>::type;
+    static const bool is_contained = true;
+};
+
+// No type is large enough.
+template <typename Lhs, typename Rhs>
+struct BigEnoughPromotion<Lhs, Rhs, true, false>
+{
+    using type                     = typename MaxExponentPromotion<Lhs, Rhs>::type;
+    static const bool is_contained = false;
+};
+
+// We can statically check if operations on the provided types can wrap, so we
+// can skip the checked operations if they're not needed. So, for an integer we
+// care if the destination type preserves the sign and is twice the width of
+// the source.
+template <typename T, typename Lhs, typename Rhs = Lhs>
+struct IsIntegerArithmeticSafe
+{
+    static const bool value =
+        !std::is_floating_point<T>::value && !std::is_floating_point<Lhs>::value &&
+        !std::is_floating_point<Rhs>::value &&
+        std::is_signed<T>::value >= std::is_signed<Lhs>::value &&
+        IntegerBitsPlusSign<T>::value >= (2 * IntegerBitsPlusSign<Lhs>::value) &&
+        std::is_signed<T>::value >= std::is_signed<Rhs>::value &&
+        IntegerBitsPlusSign<T>::value >= (2 * IntegerBitsPlusSign<Rhs>::value);
+};
+
+// Promotes to a type that can represent any possible result of a binary
+// arithmetic operation with the source types.
+template <typename Lhs,
+          typename Rhs,
+          bool is_promotion_possible = IsIntegerArithmeticSafe<
+              typename std::conditional<std::is_signed<Lhs>::value || std::is_signed<Rhs>::value,
+                                        intmax_t,
+                                        uintmax_t>::type,
+              typename MaxExponentPromotion<Lhs, Rhs>::type>::value>
+struct FastIntegerArithmeticPromotion;
+
+template <typename Lhs, typename Rhs>
+struct FastIntegerArithmeticPromotion<Lhs, Rhs, true>
+{
+    using type =
+        typename TwiceWiderInteger<typename MaxExponentPromotion<Lhs, Rhs>::type,
+                                   std::is_signed<Lhs>::value || std::is_signed<Rhs>::value>::type;
+    static_assert(IsIntegerArithmeticSafe<type, Lhs, Rhs>::value, "");
+    static const bool is_contained = true;
+};
+
+template <typename Lhs, typename Rhs>
+struct FastIntegerArithmeticPromotion<Lhs, Rhs, false>
+{
+    using type                     = typename BigEnoughPromotion<Lhs, Rhs>::type;
+    static const bool is_contained = false;
+};
+
+// Extracts the underlying type from an enum.
+template <typename T, bool is_enum = std::is_enum<T>::value>
+struct ArithmeticOrUnderlyingEnum;
+
+template <typename T>
+struct ArithmeticOrUnderlyingEnum<T, true>
+{
+    using type              = typename std::underlying_type<T>::type;
+    static const bool value = std::is_arithmetic<type>::value;
+};
+
+template <typename T>
+struct ArithmeticOrUnderlyingEnum<T, false>
+{
+    using type              = T;
+    static const bool value = std::is_arithmetic<type>::value;
+};
+
+// The following are helper templates used in the CheckedNumeric class.
+template <typename T>
+class CheckedNumeric;
+
+template <typename T>
+class ClampedNumeric;
+
+template <typename T>
+class StrictNumeric;
+
+// Used to treat CheckedNumeric and arithmetic underlying types the same.
+template <typename T>
+struct UnderlyingType
+{
+    using type                   = typename ArithmeticOrUnderlyingEnum<T>::type;
+    static const bool is_numeric = std::is_arithmetic<type>::value;
+    static const bool is_checked = false;
+    static const bool is_clamped = false;
+    static const bool is_strict  = false;
+};
+
+template <typename T>
+struct UnderlyingType<CheckedNumeric<T>>
+{
+    using type                   = T;
+    static const bool is_numeric = true;
+    static const bool is_checked = true;
+    static const bool is_clamped = false;
+    static const bool is_strict  = false;
+};
+
+template <typename T>
+struct UnderlyingType<ClampedNumeric<T>>
+{
+    using type                   = T;
+    static const bool is_numeric = true;
+    static const bool is_checked = false;
+    static const bool is_clamped = true;
+    static const bool is_strict  = false;
+};
+
+template <typename T>
+struct UnderlyingType<StrictNumeric<T>>
+{
+    using type                   = T;
+    static const bool is_numeric = true;
+    static const bool is_checked = false;
+    static const bool is_clamped = false;
+    static const bool is_strict  = true;
+};
+
+template <typename L, typename R>
+struct IsCheckedOp
+{
+    static const bool value = UnderlyingType<L>::is_numeric && UnderlyingType<R>::is_numeric &&
+                              (UnderlyingType<L>::is_checked || UnderlyingType<R>::is_checked);
+};
+
+template <typename L, typename R>
+struct IsClampedOp
+{
+    static const bool value = UnderlyingType<L>::is_numeric && UnderlyingType<R>::is_numeric &&
+                              (UnderlyingType<L>::is_clamped || UnderlyingType<R>::is_clamped) &&
+                              !(UnderlyingType<L>::is_checked || UnderlyingType<R>::is_checked);
+};
+
+template <typename L, typename R>
+struct IsStrictOp
+{
+    static const bool value = UnderlyingType<L>::is_numeric && UnderlyingType<R>::is_numeric &&
+                              (UnderlyingType<L>::is_strict || UnderlyingType<R>::is_strict) &&
+                              !(UnderlyingType<L>::is_checked || UnderlyingType<R>::is_checked) &&
+                              !(UnderlyingType<L>::is_clamped || UnderlyingType<R>::is_clamped);
+};
+
+// as_signed<> returns the supplied integral value (or integral castable
+// Numeric template) cast as a signed integral of equivalent precision.
+// I.e. it's mostly an alias for: static_cast<std::make_signed<T>::type>(t)
+template <typename Src>
+constexpr typename std::make_signed<typename base::internal::UnderlyingType<Src>::type>::type
+as_signed(const Src value)
+{
+    static_assert(std::is_integral<decltype(as_signed(value))>::value,
+                  "Argument must be a signed or unsigned integer type.");
+    return static_cast<decltype(as_signed(value))>(value);
+}
+
+// as_unsigned<> returns the supplied integral value (or integral castable
+// Numeric template) cast as an unsigned integral of equivalent precision.
+// I.e. it's mostly an alias for: static_cast<std::make_unsigned<T>::type>(t)
+template <typename Src>
+constexpr typename std::make_unsigned<typename base::internal::UnderlyingType<Src>::type>::type
+as_unsigned(const Src value)
+{
+    static_assert(std::is_integral<decltype(as_unsigned(value))>::value,
+                  "Argument must be a signed or unsigned integer type.");
+    return static_cast<decltype(as_unsigned(value))>(value);
+}
+
+template <typename L, typename R>
+constexpr bool IsLessImpl(const L lhs,
+                          const R rhs,
+                          const RangeCheck l_range,
+                          const RangeCheck r_range)
+{
+    return l_range.IsUnderflow() || r_range.IsOverflow() ||
+           (l_range == r_range &&
+            static_cast<decltype(lhs + rhs)>(lhs) < static_cast<decltype(lhs + rhs)>(rhs));
+}
+
+template <typename L, typename R>
+struct IsLess
+{
+    static_assert(std::is_arithmetic<L>::value && std::is_arithmetic<R>::value,
+                  "Types must be numeric.");
+    static constexpr bool Test(const L lhs, const R rhs)
+    {
+        return IsLessImpl(lhs, rhs, DstRangeRelationToSrcRange<R>(lhs),
+                          DstRangeRelationToSrcRange<L>(rhs));
+    }
+};
+
+template <typename L, typename R>
+constexpr bool IsLessOrEqualImpl(const L lhs,
+                                 const R rhs,
+                                 const RangeCheck l_range,
+                                 const RangeCheck r_range)
+{
+    return l_range.IsUnderflow() || r_range.IsOverflow() ||
+           (l_range == r_range &&
+            static_cast<decltype(lhs + rhs)>(lhs) <= static_cast<decltype(lhs + rhs)>(rhs));
+}
+
+template <typename L, typename R>
+struct IsLessOrEqual
+{
+    static_assert(std::is_arithmetic<L>::value && std::is_arithmetic<R>::value,
+                  "Types must be numeric.");
+    static constexpr bool Test(const L lhs, const R rhs)
+    {
+        return IsLessOrEqualImpl(lhs, rhs, DstRangeRelationToSrcRange<R>(lhs),
+                                 DstRangeRelationToSrcRange<L>(rhs));
+    }
+};
+
+template <typename L, typename R>
+constexpr bool IsGreaterImpl(const L lhs,
+                             const R rhs,
+                             const RangeCheck l_range,
+                             const RangeCheck r_range)
+{
+    return l_range.IsOverflow() || r_range.IsUnderflow() ||
+           (l_range == r_range &&
+            static_cast<decltype(lhs + rhs)>(lhs) > static_cast<decltype(lhs + rhs)>(rhs));
+}
+
+template <typename L, typename R>
+struct IsGreater
+{
+    static_assert(std::is_arithmetic<L>::value && std::is_arithmetic<R>::value,
+                  "Types must be numeric.");
+    static constexpr bool Test(const L lhs, const R rhs)
+    {
+        return IsGreaterImpl(lhs, rhs, DstRangeRelationToSrcRange<R>(lhs),
+                             DstRangeRelationToSrcRange<L>(rhs));
+    }
+};
+
+template <typename L, typename R>
+constexpr bool IsGreaterOrEqualImpl(const L lhs,
+                                    const R rhs,
+                                    const RangeCheck l_range,
+                                    const RangeCheck r_range)
+{
+    return l_range.IsOverflow() || r_range.IsUnderflow() ||
+           (l_range == r_range &&
+            static_cast<decltype(lhs + rhs)>(lhs) >= static_cast<decltype(lhs + rhs)>(rhs));
+}
+
+template <typename L, typename R>
+struct IsGreaterOrEqual
+{
+    static_assert(std::is_arithmetic<L>::value && std::is_arithmetic<R>::value,
+                  "Types must be numeric.");
+    static constexpr bool Test(const L lhs, const R rhs)
+    {
+        return IsGreaterOrEqualImpl(lhs, rhs, DstRangeRelationToSrcRange<R>(lhs),
+                                    DstRangeRelationToSrcRange<L>(rhs));
+    }
+};
+
+template <typename L, typename R>
+struct IsEqual
+{
+    static_assert(std::is_arithmetic<L>::value && std::is_arithmetic<R>::value,
+                  "Types must be numeric.");
+    static constexpr bool Test(const L lhs, const R rhs)
+    {
+        return DstRangeRelationToSrcRange<R>(lhs) == DstRangeRelationToSrcRange<L>(rhs) &&
+               static_cast<decltype(lhs + rhs)>(lhs) == static_cast<decltype(lhs + rhs)>(rhs);
+    }
+};
+
+template <typename L, typename R>
+struct IsNotEqual
+{
+    static_assert(std::is_arithmetic<L>::value && std::is_arithmetic<R>::value,
+                  "Types must be numeric.");
+    static constexpr bool Test(const L lhs, const R rhs)
+    {
+        return DstRangeRelationToSrcRange<R>(lhs) != DstRangeRelationToSrcRange<L>(rhs) ||
+               static_cast<decltype(lhs + rhs)>(lhs) != static_cast<decltype(lhs + rhs)>(rhs);
+    }
+};
+
+// These perform the actual math operations on the CheckedNumerics.
+// Binary arithmetic operations.
+template <template <typename, typename> class C, typename L, typename R>
+constexpr bool SafeCompare(const L lhs, const R rhs)
+{
+    static_assert(std::is_arithmetic<L>::value && std::is_arithmetic<R>::value,
+                  "Types must be numeric.");
+    using Promotion = BigEnoughPromotion<L, R>;
+    using BigType   = typename Promotion::type;
+    return Promotion::is_contained
+               // Force to a larger type for speed if both are contained.
+               ? C<BigType, BigType>::Test(static_cast<BigType>(static_cast<L>(lhs)),
+                                           static_cast<BigType>(static_cast<R>(rhs)))
+               // Let the template functions figure it out for mixed types.
+               : C<L, R>::Test(lhs, rhs);
+}
+
+template <typename Dst, typename Src>
+constexpr bool IsMaxInRangeForNumericType()
+{
+    return IsGreaterOrEqual<Dst, Src>::Test(std::numeric_limits<Dst>::max(),
+                                            std::numeric_limits<Src>::max());
+}
+
+template <typename Dst, typename Src>
+constexpr bool IsMinInRangeForNumericType()
+{
+    return IsLessOrEqual<Dst, Src>::Test(std::numeric_limits<Dst>::lowest(),
+                                         std::numeric_limits<Src>::lowest());
+}
+
+template <typename Dst, typename Src>
+constexpr Dst CommonMax()
+{
+    return !IsMaxInRangeForNumericType<Dst, Src>() ? Dst(std::numeric_limits<Dst>::max())
+                                                   : Dst(std::numeric_limits<Src>::max());
+}
+
+template <typename Dst, typename Src>
+constexpr Dst CommonMin()
+{
+    return !IsMinInRangeForNumericType<Dst, Src>() ? Dst(std::numeric_limits<Dst>::lowest())
+                                                   : Dst(std::numeric_limits<Src>::lowest());
+}
+
+// This is a wrapper to generate return the max or min for a supplied type.
+// If the argument is false, the returned value is the maximum. If true the
+// returned value is the minimum.
+template <typename Dst, typename Src = Dst>
+constexpr Dst CommonMaxOrMin(bool is_min)
+{
+    return is_min ? CommonMin<Dst, Src>() : CommonMax<Dst, Src>();
+}
+
+}  // namespace internal
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_SAFE_CONVERSIONS_IMPL_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math.h
new file mode 100644
index 0000000000..a708cfddc2
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math.h
@@ -0,0 +1,12 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_SAFE_MATH_H_
+#define BASE_NUMERICS_SAFE_MATH_H_
+
+#include "anglebase/numerics/checked_math.h"
+#include "anglebase/numerics/clamped_math.h"
+#include "anglebase/numerics/safe_conversions.h"
+
+#endif  // BASE_NUMERICS_SAFE_MATH_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_arm_impl.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_arm_impl.h
new file mode 100644
index 0000000000..3efdf2596d
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_arm_impl.h
@@ -0,0 +1,131 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_SAFE_MATH_ARM_IMPL_H_
+#define BASE_NUMERICS_SAFE_MATH_ARM_IMPL_H_
+
+#include <cassert>
+#include <type_traits>
+
+#include "anglebase/numerics/safe_conversions.h"
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+template <typename T, typename U>
+struct CheckedMulFastAsmOp
+{
+    static const bool is_supported = FastIntegerArithmeticPromotion<T, U>::is_contained;
+
+    // The following is much more efficient than the Clang and GCC builtins for
+    // performing overflow-checked multiplication when a twice wider type is
+    // available. The below compiles down to 2-3 instructions, depending on the
+    // width of the types in use.
+    // As an example, an int32_t multiply compiles to:
+    //    smull   r0, r1, r0, r1
+    //    cmp     r1, r1, asr #31
+    // And an int16_t multiply compiles to:
+    //    smulbb  r1, r1, r0
+    //    asr     r2, r1, #16
+    //    cmp     r2, r1, asr #15
+    template <typename V>
+    __attribute__((always_inline)) static bool Do(T x, U y, V *result)
+    {
+        using Promotion = typename FastIntegerArithmeticPromotion<T, U>::type;
+        Promotion presult;
+
+        presult = static_cast<Promotion>(x) * static_cast<Promotion>(y);
+        if (!IsValueInRangeForNumericType<V>(presult))
+            return false;
+        *result = static_cast<V>(presult);
+        return true;
+    }
+};
+
+template <typename T, typename U>
+struct ClampedAddFastAsmOp
+{
+    static const bool is_supported =
+        BigEnoughPromotion<T, U>::is_contained &&
+        IsTypeInRangeForNumericType<int32_t, typename BigEnoughPromotion<T, U>::type>::value;
+
+    template <typename V>
+    __attribute__((always_inline)) static V Do(T x, U y)
+    {
+        // This will get promoted to an int, so let the compiler do whatever is
+        // clever and rely on the saturated cast to bounds check.
+        if (IsIntegerArithmeticSafe<int, T, U>::value)
+            return saturated_cast<V>(x + y);
+
+        int32_t result;
+        int32_t x_i32 = checked_cast<int32_t>(x);
+        int32_t y_i32 = checked_cast<int32_t>(y);
+
+        asm("qadd %[result], %[first], %[second]"
+            : [result] "=r"(result)
+            : [first] "r"(x_i32), [second] "r"(y_i32));
+        return saturated_cast<V>(result);
+    }
+};
+
+template <typename T, typename U>
+struct ClampedSubFastAsmOp
+{
+    static const bool is_supported =
+        BigEnoughPromotion<T, U>::is_contained &&
+        IsTypeInRangeForNumericType<int32_t, typename BigEnoughPromotion<T, U>::type>::value;
+
+    template <typename V>
+    __attribute__((always_inline)) static V Do(T x, U y)
+    {
+        // This will get promoted to an int, so let the compiler do whatever is
+        // clever and rely on the saturated cast to bounds check.
+        if (IsIntegerArithmeticSafe<int, T, U>::value)
+            return saturated_cast<V>(x - y);
+
+        int32_t result;
+        int32_t x_i32 = checked_cast<int32_t>(x);
+        int32_t y_i32 = checked_cast<int32_t>(y);
+
+        asm("qsub %[result], %[first], %[second]"
+            : [result] "=r"(result)
+            : [first] "r"(x_i32), [second] "r"(y_i32));
+        return saturated_cast<V>(result);
+    }
+};
+
+template <typename T, typename U>
+struct ClampedMulFastAsmOp
+{
+    static const bool is_supported = CheckedMulFastAsmOp<T, U>::is_supported;
+
+    template <typename V>
+    __attribute__((always_inline)) static V Do(T x, U y)
+    {
+        // Use the CheckedMulFastAsmOp for full-width 32-bit values, because
+        // it's fewer instructions than promoting and then saturating.
+        if (!IsIntegerArithmeticSafe<int32_t, T, U>::value &&
+            !IsIntegerArithmeticSafe<uint32_t, T, U>::value)
+        {
+            V result;
+            return CheckedMulFastAsmOp<T, U>::Do(x, y, &result)
+                       ? result
+                       : CommonMaxOrMin<V>(IsValueNegative(x) ^ IsValueNegative(y));
+        }
+
+        assert((FastIntegerArithmeticPromotion<T, U>::is_contained));
+        using Promotion = typename FastIntegerArithmeticPromotion<T, U>::type;
+        return saturated_cast<V>(static_cast<Promotion>(x) * static_cast<Promotion>(y));
+    }
+};
+
+}  // namespace internal
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_SAFE_MATH_ARM_IMPL_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_clang_gcc_impl.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_clang_gcc_impl.h
new file mode 100644
index 0000000000..0f6a1e14d6
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_clang_gcc_impl.h
@@ -0,0 +1,182 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_SAFE_MATH_CLANG_GCC_IMPL_H_
+#define BASE_NUMERICS_SAFE_MATH_CLANG_GCC_IMPL_H_
+
+#include <cassert>
+#include <limits>
+#include <type_traits>
+
+#include "anglebase/numerics/safe_conversions.h"
+
+#if !defined(__native_client__) && (defined(__ARMEL__) || defined(__arch64__))
+#    include "anglebase/numerics/safe_math_arm_impl.h"
+#    define BASE_HAS_ASSEMBLER_SAFE_MATH (1)
+#else
+#    define BASE_HAS_ASSEMBLER_SAFE_MATH (0)
+#endif
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+// These are the non-functioning boilerplate implementations of the optimized
+// safe math routines.
+#if !BASE_HAS_ASSEMBLER_SAFE_MATH
+template <typename T, typename U>
+struct CheckedMulFastAsmOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr bool Do(T, U, V *)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<bool>();
+    }
+};
+
+template <typename T, typename U>
+struct ClampedAddFastAsmOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr V Do(T, U)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<V>();
+    }
+};
+
+template <typename T, typename U>
+struct ClampedSubFastAsmOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr V Do(T, U)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<V>();
+    }
+};
+
+template <typename T, typename U>
+struct ClampedMulFastAsmOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr V Do(T, U)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<V>();
+    }
+};
+#endif  // BASE_HAS_ASSEMBLER_SAFE_MATH
+#undef BASE_HAS_ASSEMBLER_SAFE_MATH
+
+template <typename T, typename U>
+struct CheckedAddFastOp
+{
+    static const bool is_supported = true;
+    template <typename V>
+    __attribute__((always_inline)) static constexpr bool Do(T x, U y, V *result)
+    {
+        return !__builtin_add_overflow(x, y, result);
+    }
+};
+
+template <typename T, typename U>
+struct CheckedSubFastOp
+{
+    static const bool is_supported = true;
+    template <typename V>
+    __attribute__((always_inline)) static constexpr bool Do(T x, U y, V *result)
+    {
+        return !__builtin_sub_overflow(x, y, result);
+    }
+};
+
+template <typename T, typename U>
+struct CheckedMulFastOp
+{
+#if defined(__clang__)
+    // TODO(jschuh): Get the Clang runtime library issues sorted out so we can
+    // support full-width, mixed-sign multiply builtins.
+    // https://crbug.com/613003
+    // We can support intptr_t, uintptr_t, or a smaller common type.
+    static const bool is_supported = (IsTypeInRangeForNumericType<intptr_t, T>::value &&
+                                      IsTypeInRangeForNumericType<intptr_t, U>::value) ||
+                                     (IsTypeInRangeForNumericType<uintptr_t, T>::value &&
+                                      IsTypeInRangeForNumericType<uintptr_t, U>::value);
+#else
+    static const bool is_supported = true;
+#endif
+    template <typename V>
+    __attribute__((always_inline)) static constexpr bool Do(T x, U y, V *result)
+    {
+        return CheckedMulFastAsmOp<T, U>::is_supported ? CheckedMulFastAsmOp<T, U>::Do(x, y, result)
+                                                       : !__builtin_mul_overflow(x, y, result);
+    }
+};
+
+template <typename T, typename U>
+struct ClampedAddFastOp
+{
+    static const bool is_supported = ClampedAddFastAsmOp<T, U>::is_supported;
+    template <typename V>
+    __attribute__((always_inline)) static V Do(T x, U y)
+    {
+        return ClampedAddFastAsmOp<T, U>::template Do<V>(x, y);
+    }
+};
+
+template <typename T, typename U>
+struct ClampedSubFastOp
+{
+    static const bool is_supported = ClampedSubFastAsmOp<T, U>::is_supported;
+    template <typename V>
+    __attribute__((always_inline)) static V Do(T x, U y)
+    {
+        return ClampedSubFastAsmOp<T, U>::template Do<V>(x, y);
+    }
+};
+
+template <typename T, typename U>
+struct ClampedMulFastOp
+{
+    static const bool is_supported = ClampedMulFastAsmOp<T, U>::is_supported;
+    template <typename V>
+    __attribute__((always_inline)) static V Do(T x, U y)
+    {
+        return ClampedMulFastAsmOp<T, U>::template Do<V>(x, y);
+    }
+};
+
+template <typename T>
+struct ClampedNegFastOp
+{
+    static const bool is_supported = std::is_signed<T>::value;
+    __attribute__((always_inline)) static T Do(T value)
+    {
+        // Use this when there is no assembler path available.
+        if (!ClampedSubFastAsmOp<T, T>::is_supported)
+        {
+            T result;
+            return !__builtin_sub_overflow(T(0), value, &result) ? result
+                                                                 : std::numeric_limits<T>::max();
+        }
+
+        // Fallback to the normal subtraction path.
+        return ClampedSubFastOp<T, T>::template Do<T>(T(0), value);
+    }
+};
+
+}  // namespace internal
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_SAFE_MATH_CLANG_GCC_IMPL_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_shared_impl.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_shared_impl.h
new file mode 100644
index 0000000000..6f46f12e5f
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/numerics/safe_math_shared_impl.h
@@ -0,0 +1,227 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_NUMERICS_SAFE_MATH_SHARED_IMPL_H_
+#define BASE_NUMERICS_SAFE_MATH_SHARED_IMPL_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <cassert>
+#include <climits>
+#include <cmath>
+#include <cstdlib>
+#include <limits>
+#include <type_traits>
+
+#include "anglebase/numerics/safe_conversions.h"
+
+#if defined(OS_ASMJS)
+// Optimized safe math instructions are incompatible with asmjs.
+#    define BASE_HAS_OPTIMIZED_SAFE_MATH (0)
+// Where available use builtin math overflow support on Clang and GCC.
+#elif !defined(__native_client__) &&                                                \
+    ((defined(__clang__) &&                                                         \
+      ((__clang_major__ > 3) || (__clang_major__ == 3 && __clang_minor__ >= 4))) || \
+     (defined(__GNUC__) && __GNUC__ >= 5))
+#    include "anglebase/numerics/safe_math_clang_gcc_impl.h"
+#    define BASE_HAS_OPTIMIZED_SAFE_MATH (1)
+#else
+#    define BASE_HAS_OPTIMIZED_SAFE_MATH (0)
+#endif
+
+namespace angle
+{
+namespace base
+{
+namespace internal
+{
+
+// These are the non-functioning boilerplate implementations of the optimized
+// safe math routines.
+#if !BASE_HAS_OPTIMIZED_SAFE_MATH
+template <typename T, typename U>
+struct CheckedAddFastOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr bool Do(T, U, V *)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<bool>();
+    }
+};
+
+template <typename T, typename U>
+struct CheckedSubFastOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr bool Do(T, U, V *)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<bool>();
+    }
+};
+
+template <typename T, typename U>
+struct CheckedMulFastOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr bool Do(T, U, V *)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<bool>();
+    }
+};
+
+template <typename T, typename U>
+struct ClampedAddFastOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr V Do(T, U)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<V>();
+    }
+};
+
+template <typename T, typename U>
+struct ClampedSubFastOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr V Do(T, U)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<V>();
+    }
+};
+
+template <typename T, typename U>
+struct ClampedMulFastOp
+{
+    static const bool is_supported = false;
+    template <typename V>
+    static constexpr V Do(T, U)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<V>();
+    }
+};
+
+template <typename T>
+struct ClampedNegFastOp
+{
+    static const bool is_supported = false;
+    static constexpr T Do(T)
+    {
+        // Force a compile failure if instantiated.
+        return CheckOnFailure::template HandleFailure<T>();
+    }
+};
+#endif  // BASE_HAS_OPTIMIZED_SAFE_MATH
+#undef BASE_HAS_OPTIMIZED_SAFE_MATH
+
+// This is used for UnsignedAbs, where we need to support floating-point
+// template instantiations even though we don't actually support the operations.
+// However, there is no corresponding implementation of e.g. SafeUnsignedAbs,
+// so the float versions will not compile.
+template <typename Numeric,
+          bool IsInteger = std::is_integral<Numeric>::value,
+          bool IsFloat   = std::is_floating_point<Numeric>::value>
+struct UnsignedOrFloatForSize;
+
+template <typename Numeric>
+struct UnsignedOrFloatForSize<Numeric, true, false>
+{
+    using type = typename std::make_unsigned<Numeric>::type;
+};
+
+template <typename Numeric>
+struct UnsignedOrFloatForSize<Numeric, false, true>
+{
+    using type = Numeric;
+};
+
+// Wrap the unary operations to allow SFINAE when instantiating integrals versus
+// floating points. These don't perform any overflow checking. Rather, they
+// exhibit well-defined overflow semantics and rely on the caller to detect
+// if an overflow occured.
+
+template <typename T, typename std::enable_if<std::is_integral<T>::value>::type * = nullptr>
+constexpr T NegateWrapper(T value)
+{
+    using UnsignedT = typename std::make_unsigned<T>::type;
+    // This will compile to a NEG on Intel, and is normal negation on ARM.
+    return static_cast<T>(UnsignedT(0) - static_cast<UnsignedT>(value));
+}
+
+template <typename T, typename std::enable_if<std::is_floating_point<T>::value>::type * = nullptr>
+constexpr T NegateWrapper(T value)
+{
+    return -value;
+}
+
+template <typename T, typename std::enable_if<std::is_integral<T>::value>::type * = nullptr>
+constexpr typename std::make_unsigned<T>::type InvertWrapper(T value)
+{
+    return ~value;
+}
+
+template <typename T, typename std::enable_if<std::is_integral<T>::value>::type * = nullptr>
+constexpr T AbsWrapper(T value)
+{
+    return static_cast<T>(SafeUnsignedAbs(value));
+}
+
+template <typename T, typename std::enable_if<std::is_floating_point<T>::value>::type * = nullptr>
+constexpr T AbsWrapper(T value)
+{
+    return value < 0 ? -value : value;
+}
+
+template <template <typename, typename, typename> class M, typename L, typename R>
+struct MathWrapper
+{
+    using math = M<typename UnderlyingType<L>::type, typename UnderlyingType<R>::type, void>;
+    using type = typename math::result_type;
+};
+
+// The following macros are just boilerplate for the standard arithmetic
+// operator overloads and variadic function templates. A macro isn't the nicest
+// solution, but it beats rewriting these over and over again.
+#define BASE_NUMERIC_ARITHMETIC_VARIADIC(CLASS, CL_ABBR, OP_NAME)                     \
+    template <typename L, typename R, typename... Args>                               \
+    constexpr auto CL_ABBR##OP_NAME(const L lhs, const R rhs, const Args... args)     \
+    {                                                                                 \
+        return CL_ABBR##MathOp<CLASS##OP_NAME##Op, L, R, Args...>(lhs, rhs, args...); \
+    }
+
+#define BASE_NUMERIC_ARITHMETIC_OPERATORS(CLASS, CL_ABBR, OP_NAME, OP, CMP_OP)                  \
+    /* Binary arithmetic operator for all CLASS##Numeric operations. */                         \
+    template <typename L, typename R,                                                           \
+              typename std::enable_if<Is##CLASS##Op<L, R>::value>::type * = nullptr>            \
+    constexpr CLASS##Numeric<typename MathWrapper<CLASS##OP_NAME##Op, L, R>::type> operator OP( \
+        const L lhs, const R rhs)                                                               \
+    {                                                                                           \
+        return decltype(lhs OP rhs)::template MathOp<CLASS##OP_NAME##Op>(lhs, rhs);             \
+    }                                                                                           \
+    /* Assignment arithmetic operator implementation from CLASS##Numeric. */                    \
+    template <typename L>                                                                       \
+    template <typename R>                                                                       \
+    constexpr CLASS##Numeric<L> &CLASS##Numeric<L>::operator CMP_OP(const R rhs)                \
+    {                                                                                           \
+        return MathOp<CLASS##OP_NAME##Op>(rhs);                                                 \
+    }                                                                                           \
+    /* Variadic arithmetic functions that return CLASS##Numeric. */                             \
+    BASE_NUMERIC_ARITHMETIC_VARIADIC(CLASS, CL_ABBR, OP_NAME)
+
+}  // namespace internal
+}  // namespace base
+}  // namespace angle
+
+#endif  // BASE_NUMERICS_SAFE_MATH_SHARED_IMPL_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/sha1.cc b/gfx/angle/checkout/src/common/third_party/base/anglebase/sha1.cc
new file mode 100644
index 0000000000..cb88ba06e1
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/sha1.cc
@@ -0,0 +1,245 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "anglebase/sha1.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "anglebase/sys_byteorder.h"
+
+namespace angle
+{
+
+namespace base
+{
+
+// Implementation of SHA-1. Only handles data in byte-sized blocks,
+// which simplifies the code a fair bit.
+
+// Identifier names follow notation in FIPS PUB 180-3, where you'll
+// also find a description of the algorithm:
+// http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf
+
+// Usage example:
+//
+// SecureHashAlgorithm sha;
+// while(there is data to hash)
+//   sha.Update(moredata, size of data);
+// sha.Final();
+// memcpy(somewhere, sha.Digest(), 20);
+//
+// to reuse the instance of sha, call sha.Init();
+
+// TODO(jhawkins): Replace this implementation with a per-platform
+// implementation using each platform's crypto library.  See
+// http://crbug.com/47218
+
+class SecureHashAlgorithm
+{
+  public:
+    SecureHashAlgorithm() { Init(); }
+
+    static const int kDigestSizeBytes;
+
+    void Init();
+    void Update(const void *data, size_t nbytes);
+    void Final();
+
+    // 20 bytes of message digest.
+    const unsigned char *Digest() const { return reinterpret_cast<const unsigned char *>(H); }
+
+  private:
+    void Pad();
+    void Process();
+
+    uint32_t A, B, C, D, E;
+
+    uint32_t H[5];
+
+    union {
+        uint32_t W[80];
+        uint8_t M[64];
+    };
+
+    uint32_t cursor;
+    uint64_t l;
+};
+
+static inline uint32_t f(uint32_t t, uint32_t B, uint32_t C, uint32_t D)
+{
+    if (t < 20)
+    {
+        return (B & C) | ((~B) & D);
+    }
+    else if (t < 40)
+    {
+        return B ^ C ^ D;
+    }
+    else if (t < 60)
+    {
+        return (B & C) | (B & D) | (C & D);
+    }
+    else
+    {
+        return B ^ C ^ D;
+    }
+}
+
+static inline uint32_t S(uint32_t n, uint32_t X)
+{
+    return (X << n) | (X >> (32 - n));
+}
+
+static inline uint32_t K(uint32_t t)
+{
+    if (t < 20)
+    {
+        return 0x5a827999;
+    }
+    else if (t < 40)
+    {
+        return 0x6ed9eba1;
+    }
+    else if (t < 60)
+    {
+        return 0x8f1bbcdc;
+    }
+    else
+    {
+        return 0xca62c1d6;
+    }
+}
+
+const int SecureHashAlgorithm::kDigestSizeBytes = 20;
+
+void SecureHashAlgorithm::Init()
+{
+    A      = 0;
+    B      = 0;
+    C      = 0;
+    D      = 0;
+    E      = 0;
+    cursor = 0;
+    l      = 0;
+    H[0]   = 0x67452301;
+    H[1]   = 0xefcdab89;
+    H[2]   = 0x98badcfe;
+    H[3]   = 0x10325476;
+    H[4]   = 0xc3d2e1f0;
+}
+
+void SecureHashAlgorithm::Final()
+{
+    Pad();
+    Process();
+
+    for (int t = 0; t < 5; ++t)
+        H[t]   = ByteSwap(H[t]);
+}
+
+void SecureHashAlgorithm::Update(const void *data, size_t nbytes)
+{
+    const uint8_t *d = reinterpret_cast<const uint8_t *>(data);
+    while (nbytes--)
+    {
+        M[cursor++] = *d++;
+        if (cursor >= 64)
+            Process();
+        l += 8;
+    }
+}
+
+void SecureHashAlgorithm::Pad()
+{
+    M[cursor++] = 0x80;
+
+    if (cursor > 64 - 8)
+    {
+        // pad out to next block
+        while (cursor < 64)
+            M[cursor++] = 0;
+
+        Process();
+    }
+
+    while (cursor < 64 - 8)
+        M[cursor++] = 0;
+
+    M[cursor++] = (l >> 56) & 0xff;
+    M[cursor++] = (l >> 48) & 0xff;
+    M[cursor++] = (l >> 40) & 0xff;
+    M[cursor++] = (l >> 32) & 0xff;
+    M[cursor++] = (l >> 24) & 0xff;
+    M[cursor++] = (l >> 16) & 0xff;
+    M[cursor++] = (l >> 8) & 0xff;
+    M[cursor++] = l & 0xff;
+}
+
+void SecureHashAlgorithm::Process()
+{
+    uint32_t t;
+
+    // Each a...e corresponds to a section in the FIPS 180-3 algorithm.
+
+    // a.
+    //
+    // W and M are in a union, so no need to memcpy.
+    // memcpy(W, M, sizeof(M));
+    for (t   = 0; t < 16; ++t)
+        W[t] = ByteSwap(W[t]);
+
+    // b.
+    for (t   = 16; t < 80; ++t)
+        W[t] = S(1, W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16]);
+
+    // c.
+    A = H[0];
+    B = H[1];
+    C = H[2];
+    D = H[3];
+    E = H[4];
+
+    // d.
+    for (t = 0; t < 80; ++t)
+    {
+        uint32_t TEMP = S(5, A) + f(t, B, C, D) + E + W[t] + K(t);
+        E             = D;
+        D             = C;
+        C             = S(30, B);
+        B             = A;
+        A             = TEMP;
+    }
+
+    // e.
+    H[0] += A;
+    H[1] += B;
+    H[2] += C;
+    H[3] += D;
+    H[4] += E;
+
+    cursor = 0;
+}
+
+std::string SHA1HashString(const std::string &str)
+{
+    char hash[SecureHashAlgorithm::kDigestSizeBytes];
+    SHA1HashBytes(reinterpret_cast<const unsigned char *>(str.c_str()), str.length(),
+                  reinterpret_cast<unsigned char *>(hash));
+    return std::string(hash, SecureHashAlgorithm::kDigestSizeBytes);
+}
+
+void SHA1HashBytes(const unsigned char *data, size_t len, unsigned char *hash)
+{
+    SecureHashAlgorithm sha;
+    sha.Update(data, len);
+    sha.Final();
+
+    memcpy(hash, sha.Digest(), SecureHashAlgorithm::kDigestSizeBytes);
+}
+
+}  // namespace base
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/sha1.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/sha1.h
new file mode 100644
index 0000000000..a60908814f
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/sha1.h
@@ -0,0 +1,36 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ANGLEBASE_SHA1_H_
+#define ANGLEBASE_SHA1_H_
+
+#include <stddef.h>
+
+#include <string>
+
+#include "anglebase/base_export.h"
+
+namespace angle
+{
+
+namespace base
+{
+
+// These functions perform SHA-1 operations.
+
+static const size_t kSHA1Length = 20;  // Length in bytes of a SHA-1 hash.
+
+// Computes the SHA-1 hash of the input string |str| and returns the full
+// hash.
+ANGLEBASE_EXPORT std::string SHA1HashString(const std::string &str);
+
+// Computes the SHA-1 hash of the |len| bytes in |data| and puts the hash
+// in |hash|. |hash| must be kSHA1Length bytes long.
+ANGLEBASE_EXPORT void SHA1HashBytes(const unsigned char *data, size_t len, unsigned char *hash);
+
+}  // namespace base
+
+}  // namespace angle
+
+#endif  // ANGLEBASE_SHA1_H_
diff --git a/gfx/angle/checkout/src/common/third_party/base/anglebase/sys_byteorder.h b/gfx/angle/checkout/src/common/third_party/base/anglebase/sys_byteorder.h
new file mode 100644
index 0000000000..70d9c275e6
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/base/anglebase/sys_byteorder.h
@@ -0,0 +1,49 @@
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// sys_byteorder.h: Compatiblity hacks for importing Chromium's base/SHA1.
+
+#ifndef ANGLEBASE_SYS_BYTEORDER_H_
+#define ANGLEBASE_SYS_BYTEORDER_H_
+
+namespace angle
+{
+
+namespace base
+{
+
+// Returns a value with all bytes in |x| swapped, i.e. reverses the endianness.
+inline uint16_t ByteSwap(uint16_t x)
+{
+#if defined(_MSC_VER)
+    return _byteswap_ushort(x);
+#else
+    return __builtin_bswap16(x);
+#endif
+}
+
+inline uint32_t ByteSwap(uint32_t x)
+{
+#if defined(_MSC_VER)
+    return _byteswap_ulong(x);
+#else
+    return __builtin_bswap32(x);
+#endif
+}
+
+inline uint64_t ByteSwap(uint64_t x)
+{
+#if defined(_MSC_VER)
+    return _byteswap_uint64(x);
+#else
+    return __builtin_bswap64(x);
+#endif
+}
+
+}  // namespace base
+
+}  // namespace angle
+
+#endif  // ANGLEBASE_SYS_BYTEORDER_H_
diff --git a/gfx/angle/checkout/src/common/third_party/smhasher/src/PMurHash.cpp b/gfx/angle/checkout/src/common/third_party/smhasher/src/PMurHash.cpp
new file mode 100644
index 0000000000..379e5ce3d5
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/smhasher/src/PMurHash.cpp
@@ -0,0 +1,339 @@
+/*-----------------------------------------------------------------------------
+ * MurmurHash3 was written by Austin Appleby, and is placed in the public
+ * domain.
+ *
+ * This implementation was written by Shane Day, and is also public domain.
+ *
+ * This is a portable ANSI C implementation of MurmurHash3_x86_32 (Murmur3A)
+ * with support for progressive processing.
+ */
+
+/*-----------------------------------------------------------------------------
+
+If you want to understand the MurmurHash algorithm you would be much better
+off reading the original source. Just point your browser at:
+http://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp
+
+
+What this version provides?
+
+1. Progressive data feeding. Useful when the entire payload to be hashed
+does not fit in memory or when the data is streamed through the application.
+Also useful when hashing a number of strings with a common prefix. A partial
+hash of a prefix string can be generated and reused for each suffix string.
+
+2. Portability. Plain old C so that it should compile on any old compiler.
+Both CPU endian and access-alignment neutral, but avoiding inefficient code
+when possible depending on CPU capabilities.
+
+3. Drop in. I personally like nice self contained public domain code, making it
+easy to pilfer without loads of refactoring to work properly in the existing
+application code & makefile structure and mucking around with licence files.
+Just copy PMurHash.h and PMurHash.c and you're ready to go.
+
+
+How does it work?
+
+We can only process entire 32 bit chunks of input, except for the very end
+that may be shorter. So along with the partial hash we need to give back to
+the caller a carry containing up to 3 bytes that we were unable to process.
+This carry also needs to record the number of bytes the carry holds. I use
+the low 2 bits as a count (0..3) and the carry bytes are shifted into the
+high byte in stream order.
+
+To handle endianess I simply use a macro that reads a uint32_t and define
+that macro to be a direct read on little endian machines, a read and swap
+on big endian machines, or a byte-by-byte read if the endianess is unknown.
+
+-----------------------------------------------------------------------------*/
+
+#include "PMurHash.h"
+#include <stdint.h>
+
+/* I used ugly type names in the header to avoid potential conflicts with
+ * application or system typedefs & defines. Since I'm not including any more
+ * headers below here I can rename these so that the code reads like C99 */
+#undef uint32_t
+#define uint32_t MH_UINT32
+#undef uint8_t
+#define uint8_t MH_UINT8
+
+/* MSVC warnings we choose to ignore */
+#if defined(_MSC_VER)
+#    pragma warning(disable : 4127) /* conditional expression is constant */
+#endif
+
+/*-----------------------------------------------------------------------------
+ * Endianess, misalignment capabilities and util macros
+ *
+ * The following 3 macros are defined in this section. The other macros defined
+ * are only needed to help derive these 3.
+ *
+ * READ_UINT32(x)   Read a little endian unsigned 32-bit int
+ * UNALIGNED_SAFE   Defined if READ_UINT32 works on non-word boundaries
+ * ROTL32(x,r)      Rotate x left by r bits
+ */
+
+/* Convention is to define __BYTE_ORDER == to one of these values */
+#if !defined(__BIG_ENDIAN)
+#    define __BIG_ENDIAN 4321
+#endif
+#if !defined(__LITTLE_ENDIAN)
+#    define __LITTLE_ENDIAN 1234
+#endif
+
+/* I386 */
+#if defined(_M_IX86) || defined(__i386__) || defined(__i386) || defined(i386)
+#    define __BYTE_ORDER __LITTLE_ENDIAN
+#    define UNALIGNED_SAFE
+#endif
+
+/* gcc 'may' define __LITTLE_ENDIAN__ or __BIG_ENDIAN__ to 1 (Note the trailing __),
+ * or even _LITTLE_ENDIAN or _BIG_ENDIAN (Note the single _ prefix) */
+#if !defined(__BYTE_ORDER)
+#    if defined(__LITTLE_ENDIAN__) && __LITTLE_ENDIAN__ == 1 || \
+        defined(_LITTLE_ENDIAN) && _LITTLE_ENDIAN == 1
+#        define __BYTE_ORDER __LITTLE_ENDIAN
+#    elif defined(__BIG_ENDIAN__) && __BIG_ENDIAN__ == 1 || defined(_BIG_ENDIAN) && _BIG_ENDIAN == 1
+#        define __BYTE_ORDER __BIG_ENDIAN
+#    endif
+#endif
+
+/* gcc (usually) defines xEL/EB macros for ARM and MIPS endianess */
+#if !defined(__BYTE_ORDER)
+#    if defined(__ARMEL__) || defined(__MIPSEL__)
+#        define __BYTE_ORDER __LITTLE_ENDIAN
+#    endif
+#    if defined(__ARMEB__) || defined(__MIPSEB__)
+#        define __BYTE_ORDER __BIG_ENDIAN
+#    endif
+#endif
+
+/* Now find best way we can to READ_UINT32 */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+/* CPU endian matches murmurhash algorithm, so read 32-bit word directly */
+#    define READ_UINT32(ptr) (*((uint32_t *)(ptr)))
+#elif __BYTE_ORDER == __BIG_ENDIAN
+/* TODO: Add additional cases below where a compiler provided bswap32 is available */
+#    if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+#        define READ_UINT32(ptr) (__builtin_bswap32(*((uint32_t *)(ptr))))
+#    else
+/* Without a known fast bswap32 we're just as well off doing this */
+#        define READ_UINT32(ptr) (ptr[0] | ptr[1] << 8 | ptr[2] << 16 | ptr[3] << 24)
+#        define UNALIGNED_SAFE
+#    endif
+#else
+/* Unknown endianess so last resort is to read individual bytes */
+#    define READ_UINT32(ptr) (ptr[0] | ptr[1] << 8 | ptr[2] << 16 | ptr[3] << 24)
+
+/* Since we're not doing word-reads we can skip the messing about with realignment */
+#    define UNALIGNED_SAFE
+#endif
+
+/* Find best way to ROTL32 */
+#if defined(_MSC_VER)
+#    include <stdlib.h> /* Microsoft put _rotl declaration in here */
+#    define ROTL32(x, r) _rotl(x, r)
+#else
+/* gcc recognises this code and generates a rotate instruction for CPUs with one */
+#    define ROTL32(x, r) (((uint32_t)x << r) | ((uint32_t)x >> (32 - r)))
+#endif
+
+/*-----------------------------------------------------------------------------
+ * Core murmurhash algorithm macros */
+
+#define C1 (0xcc9e2d51)
+#define C2 (0x1b873593)
+
+/* This is the main processing body of the algorithm. It operates
+ * on each full 32-bits of input. */
+#define DOBLOCK(h1, k1)           \
+    do                            \
+    {                             \
+        k1 *= C1;                 \
+        k1 = ROTL32(k1, 15);      \
+        k1 *= C2;                 \
+                                  \
+        h1 ^= k1;                 \
+        h1 = ROTL32(h1, 13);      \
+        h1 = h1 * 5 + 0xe6546b64; \
+    } while (0)
+
+/* Append unaligned bytes to carry, forcing hash churn if we have 4 bytes */
+/* cnt=bytes to process, h1=name of h1 var, c=carry, n=bytes in c, ptr/len=payload */
+#define DOBYTES(cnt, h1, c, n, ptr, len) \
+    do                                   \
+    {                                    \
+        int _i = cnt;                    \
+        while (_i--)                     \
+        {                                \
+            c = c >> 8 | *ptr++ << 24;   \
+            n++;                         \
+            len--;                       \
+            if (n == 4)                  \
+            {                            \
+                DOBLOCK(h1, c);          \
+                n = 0;                   \
+            }                            \
+        }                                \
+    } while (0)
+
+/*---------------------------------------------------------------------------*/
+
+namespace angle
+{
+/* Main hashing function. Initialise carry to 0 and h1 to 0 or an initial seed
+ * if wanted. Both ph1 and pcarry are required arguments. */
+void PMurHash32_Process(uint32_t *ph1, uint32_t *pcarry, const void *key, int len)
+{
+    uint32_t h1 = *ph1;
+    uint32_t c  = *pcarry;
+
+    const uint8_t *ptr = (uint8_t *)key;
+    const uint8_t *end;
+
+    /* Extract carry count from low 2 bits of c value */
+    int n = c & 3;
+
+#if defined(UNALIGNED_SAFE)
+    /* This CPU handles unaligned word access */
+
+    /* Consume any carry bytes */
+    int i = (4 - n) & 3;
+    if (i && i <= len)
+    {
+        DOBYTES(i, h1, c, n, ptr, len);
+    }
+
+    /* Process 32-bit chunks */
+    end = ptr + len / 4 * 4;
+    for (; ptr < end; ptr += 4)
+    {
+        uint32_t k1 = READ_UINT32(ptr);
+        DOBLOCK(h1, k1);
+    }
+
+#else  /*UNALIGNED_SAFE*/
+    /* This CPU does not handle unaligned word access */
+
+    /* Consume enough so that the next data byte is word aligned */
+    int i = -(intptr_t)ptr & 3;
+    if (i && i <= len)
+    {
+        DOBYTES(i, h1, c, n, ptr, len);
+    }
+
+    /* We're now aligned. Process in aligned blocks. Specialise for each possible carry count */
+    end = ptr + len / 4 * 4;
+    switch (n)
+    {           /* how many bytes in c */
+        case 0: /* c=[----]  w=[3210]  b=[3210]=w            c'=[----] */
+            for (; ptr < end; ptr += 4)
+            {
+                uint32_t k1 = READ_UINT32(ptr);
+                DOBLOCK(h1, k1);
+            }
+            break;
+        case 1: /* c=[0---]  w=[4321]  b=[3210]=c>>24|w<<8   c'=[4---] */
+            for (; ptr < end; ptr += 4)
+            {
+                uint32_t k1 = c >> 24;
+                c           = READ_UINT32(ptr);
+                k1 |= c << 8;
+                DOBLOCK(h1, k1);
+            }
+            break;
+        case 2: /* c=[10--]  w=[5432]  b=[3210]=c>>16|w<<16  c'=[54--] */
+            for (; ptr < end; ptr += 4)
+            {
+                uint32_t k1 = c >> 16;
+                c           = READ_UINT32(ptr);
+                k1 |= c << 16;
+                DOBLOCK(h1, k1);
+            }
+            break;
+        case 3: /* c=[210-]  w=[6543]  b=[3210]=c>>8|w<<24   c'=[654-] */
+            for (; ptr < end; ptr += 4)
+            {
+                uint32_t k1 = c >> 8;
+                c           = READ_UINT32(ptr);
+                k1 |= c << 24;
+                DOBLOCK(h1, k1);
+            }
+    }
+#endif /*UNALIGNED_SAFE*/
+
+    /* Advance over whole 32-bit chunks, possibly leaving 1..3 bytes */
+    len -= len / 4 * 4;
+
+    /* Append any remaining bytes into carry */
+    DOBYTES(len, h1, c, n, ptr, len);
+
+    /* Copy out new running hash and carry */
+    *ph1    = h1;
+    *pcarry = (c & ~0xff) | n;
+}
+
+/*---------------------------------------------------------------------------*/
+
+/* Finalize a hash. To match the original Murmur3A the total_length must be provided */
+uint32_t PMurHash32_Result(uint32_t h, uint32_t carry, uint32_t total_length)
+{
+    uint32_t k1;
+    int n = carry & 3;
+    if (n)
+    {
+        k1 = carry >> (4 - n) * 8;
+        k1 *= C1;
+        k1 = ROTL32(k1, 15);
+        k1 *= C2;
+        h ^= k1;
+    }
+    h ^= total_length;
+
+    /* fmix */
+    h ^= h >> 16;
+    h *= 0x85ebca6b;
+    h ^= h >> 13;
+    h *= 0xc2b2ae35;
+    h ^= h >> 16;
+
+    return h;
+}
+
+/*---------------------------------------------------------------------------*/
+
+/* Murmur3A compatable all-at-once */
+uint32_t PMurHash32(uint32_t seed, const void *key, int len)
+{
+    uint32_t h1 = seed, carry = 0;
+    PMurHash32_Process(&h1, &carry, key, len);
+    return PMurHash32_Result(h1, carry, len);
+}
+
+/*---------------------------------------------------------------------------*/
+
+/* Provide an API suitable for smhasher */
+void PMurHash32_test(const void *key, int len, uint32_t seed, void *out)
+{
+    uint32_t h1 = seed, carry = 0;
+    const uint8_t *ptr = (uint8_t *)key;
+    const uint8_t *end = ptr + len;
+
+#if 0 /* Exercise the progressive processing */
+  while(ptr < end) {
+    //const uint8_t *mid = ptr + rand()%(end-ptr)+1;
+    const uint8_t *mid = ptr + (rand()&0xF);
+    mid = mid<end?mid:end;
+    PMurHash32_Process(&h1, &carry, ptr, mid-ptr);
+    ptr = mid;
+  }
+#else
+    PMurHash32_Process(&h1, &carry, ptr, (int)(end - ptr));
+#endif
+    h1               = PMurHash32_Result(h1, carry, len);
+    *(uint32_t *)out = h1;
+}
+}  // namespace angle
+
+/*---------------------------------------------------------------------------*/
diff --git a/gfx/angle/checkout/src/common/third_party/smhasher/src/PMurHash.h b/gfx/angle/checkout/src/common/third_party/smhasher/src/PMurHash.h
new file mode 100644
index 0000000000..0a3c96fa14
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/smhasher/src/PMurHash.h
@@ -0,0 +1,57 @@
+/*-----------------------------------------------------------------------------
+ * MurmurHash3 was written by Austin Appleby, and is placed in the public
+ * domain.
+ *
+ * This implementation was written by Shane Day, and is also public domain.
+ *
+ * This is a portable ANSI C implementation of MurmurHash3_x86_32 (Murmur3A)
+ * with support for progressive processing.
+ */
+
+/* ------------------------------------------------------------------------- */
+/* Determine what native type to use for uint32_t */
+
+/* We can't use the name 'uint32_t' here because it will conflict with
+ * any version provided by the system headers or application. */
+
+/* First look for special cases */
+#if defined(_MSC_VER)
+#    define MH_UINT32 unsigned long
+#endif
+
+/* If the compiler says it's C99 then take its word for it */
+#if !defined(MH_UINT32) && (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
+#    include <stdint.h>
+#    define MH_UINT32 uint32_t
+#endif
+
+/* Otherwise try testing against max value macros from limit.h */
+#if !defined(MH_UINT32)
+#    include <limits.h>
+#    if (USHRT_MAX == 0xffffffffUL)
+#        define MH_UINT32 unsigned short
+#    elif (UINT_MAX == 0xffffffffUL)
+#        define MH_UINT32 unsigned int
+#    elif (ULONG_MAX == 0xffffffffUL)
+#        define MH_UINT32 unsigned long
+#    endif
+#endif
+
+#if !defined(MH_UINT32)
+#    error Unable to determine type name for unsigned 32-bit int
+#endif
+
+/* I'm yet to work on a platform where 'unsigned char' is not 8 bits */
+#define MH_UINT8 unsigned char
+
+/* ------------------------------------------------------------------------- */
+/* Prototypes */
+
+namespace angle
+{
+void PMurHash32_Process(MH_UINT32 *ph1, MH_UINT32 *pcarry, const void *key, int len);
+MH_UINT32 PMurHash32_Result(MH_UINT32 h1, MH_UINT32 carry, MH_UINT32 total_length);
+MH_UINT32 PMurHash32(MH_UINT32 seed, const void *key, int len);
+
+void PMurHash32_test(const void *key, int len, MH_UINT32 seed, void *out);
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/third_party/xxhash/xxhash.c b/gfx/angle/checkout/src/common/third_party/xxhash/xxhash.c
new file mode 100644
index 0000000000..ae9a55116c
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/xxhash/xxhash.c
@@ -0,0 +1,1030 @@
+/*
+*  xxHash - Fast Hash algorithm
+*  Copyright (C) 2012-2016, Yann Collet
+*
+*  BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+*
+*  Redistribution and use in source and binary forms, with or without
+*  modification, are permitted provided that the following conditions are
+*  met:
+*
+*  * Redistributions of source code must retain the above copyright
+*  notice, this list of conditions and the following disclaimer.
+*  * Redistributions in binary form must reproduce the above
+*  copyright notice, this list of conditions and the following disclaimer
+*  in the documentation and/or other materials provided with the
+*  distribution.
+*
+*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+*  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+*  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+*  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+*  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+*  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+*  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+*  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*  You can contact the author at :
+*  - xxHash homepage: http://www.xxhash.com
+*  - xxHash source repository : https://github.com/Cyan4973/xxHash
+*/
+
+
+/* *************************************
+*  Tuning parameters
+***************************************/
+/*!XXH_FORCE_MEMORY_ACCESS :
+ * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable.
+ * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal.
+ * The below switch allow to select different access method for improved performance.
+ * Method 0 (default) : use `memcpy()`. Safe and portable.
+ * Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable).
+ *            This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`.
+ * Method 2 : direct access. This method doesn't depend on compiler but violate C standard.
+ *            It can generate buggy code on targets which do not support unaligned memory accesses.
+ *            But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6)
+ * See http://stackoverflow.com/a/32095106/646947 for details.
+ * Prefer these methods in priority order (0 > 1 > 2)
+ */
+#ifndef XXH_FORCE_MEMORY_ACCESS   /* can be defined externally, on command line for example */
+#  if defined(__GNUC__) && ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
+                        || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \
+                        || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) )
+#    define XXH_FORCE_MEMORY_ACCESS 2
+#  elif (defined(__INTEL_COMPILER) && !defined(_WIN32)) || \
+  (defined(__GNUC__) && ( defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \
+                    || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \
+                    || defined(__ARM_ARCH_7S__) ))
+#    define XXH_FORCE_MEMORY_ACCESS 1
+#  endif
+#endif
+
+/*!XXH_ACCEPT_NULL_INPUT_POINTER :
+ * If input pointer is NULL, xxHash default behavior is to dereference it, triggering a segfault.
+ * When this macro is enabled, xxHash actively checks input for null pointer.
+ * It it is, result for null input pointers is the same as a null-length input.
+ */
+#ifndef XXH_ACCEPT_NULL_INPUT_POINTER   /* can be defined externally */
+#  define XXH_ACCEPT_NULL_INPUT_POINTER 0
+#endif
+
+/*!XXH_FORCE_NATIVE_FORMAT :
+ * By default, xxHash library provides endian-independent Hash values, based on little-endian convention.
+ * Results are therefore identical for little-endian and big-endian CPU.
+ * This comes at a performance cost for big-endian CPU, since some swapping is required to emulate little-endian format.
+ * Should endian-independence be of no importance for your application, you may set the #define below to 1,
+ * to improve speed for Big-endian CPU.
+ * This option has no impact on Little_Endian CPU.
+ */
+#ifndef XXH_FORCE_NATIVE_FORMAT   /* can be defined externally */
+#  define XXH_FORCE_NATIVE_FORMAT 0
+#endif
+
+/*!XXH_FORCE_ALIGN_CHECK :
+ * This is a minor performance trick, only useful with lots of very small keys.
+ * It means : check for aligned/unaligned input.
+ * The check costs one initial branch per hash;
+ * set it to 0 when the input is guaranteed to be aligned,
+ * or when alignment doesn't matter for performance.
+ */
+#ifndef XXH_FORCE_ALIGN_CHECK /* can be defined externally */
+#  if defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64)
+#    define XXH_FORCE_ALIGN_CHECK 0
+#  else
+#    define XXH_FORCE_ALIGN_CHECK 1
+#  endif
+#endif
+
+
+/* *************************************
+*  Includes & Memory related functions
+***************************************/
+/*! Modify the local functions below should you wish to use some other memory routines
+*   for malloc(), free() */
+#include <stdlib.h>
+static void* XXH_malloc(size_t s) { return malloc(s); }
+static void  XXH_free  (void* p)  { free(p); }
+/*! and for memcpy() */
+#include <string.h>
+static void* XXH_memcpy(void* dest, const void* src, size_t size) { return memcpy(dest,src,size); }
+
+#include <assert.h>   /* assert */
+
+#define XXH_STATIC_LINKING_ONLY
+#include "xxhash.h"
+
+
+/* *************************************
+*  Compiler Specific Options
+***************************************/
+#ifdef _MSC_VER    /* Visual Studio */
+#  pragma warning(disable : 4127)      /* disable: C4127: conditional expression is constant */
+#  define FORCE_INLINE static __forceinline
+#else
+#  if defined (__cplusplus) || defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L   /* C99 */
+#    ifdef __GNUC__
+#      define FORCE_INLINE static inline __attribute__((always_inline))
+#    else
+#      define FORCE_INLINE static inline
+#    endif
+#  else
+#    define FORCE_INLINE static
+#  endif /* __STDC_VERSION__ */
+#endif
+
+
+/* *************************************
+*  Basic Types
+***************************************/
+#ifndef MEM_MODULE
+# if !defined (__VMS) \
+  && (defined (__cplusplus) \
+  || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
+#   include <stdint.h>
+    typedef uint8_t  BYTE;
+    typedef uint16_t U16;
+    typedef uint32_t U32;
+# else
+    typedef unsigned char      BYTE;
+    typedef unsigned short     U16;
+    typedef unsigned int       U32;
+# endif
+#endif
+
+#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==2))
+
+/* Force direct memory access. Only works on CPU which support unaligned memory access in hardware */
+static U32 XXH_read32(const void* memPtr) { return *(const U32*) memPtr; }
+
+#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==1))
+
+/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
+/* currently only defined for gcc and icc */
+typedef union { U32 u32; } __attribute__((packed)) unalign;
+static U32 XXH_read32(const void* ptr) { return ((const unalign*)ptr)->u32; }
+
+#else
+
+/* portable and safe solution. Generally efficient.
+ * see : http://stackoverflow.com/a/32095106/646947
+ */
+static U32 XXH_read32(const void* memPtr)
+{
+    U32 val;
+    memcpy(&val, memPtr, sizeof(val));
+    return val;
+}
+
+#endif   /* XXH_FORCE_DIRECT_MEMORY_ACCESS */
+
+
+/* ****************************************
+*  Compiler-specific Functions and Macros
+******************************************/
+#define XXH_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+
+/* Note : although _rotl exists for minGW (GCC under windows), performance seems poor */
+#if defined(_MSC_VER)
+#  define XXH_rotl32(x,r) _rotl(x,r)
+#  define XXH_rotl64(x,r) _rotl64(x,r)
+#else
+#  define XXH_rotl32(x,r) ((x << r) | (x >> (32 - r)))
+#  define XXH_rotl64(x,r) ((x << r) | (x >> (64 - r)))
+#endif
+
+#if defined(_MSC_VER)     /* Visual Studio */
+#  define XXH_swap32 _byteswap_ulong
+#elif XXH_GCC_VERSION >= 403
+#  define XXH_swap32 __builtin_bswap32
+#else
+static U32 XXH_swap32 (U32 x)
+{
+    return  ((x << 24) & 0xff000000 ) |
+            ((x <<  8) & 0x00ff0000 ) |
+            ((x >>  8) & 0x0000ff00 ) |
+            ((x >> 24) & 0x000000ff );
+}
+#endif
+
+
+/* *************************************
+*  Architecture Macros
+***************************************/
+typedef enum { XXH_bigEndian=0, XXH_littleEndian=1 } XXH_endianess;
+
+/* XXH_CPU_LITTLE_ENDIAN can be defined externally, for example on the compiler command line */
+#ifndef XXH_CPU_LITTLE_ENDIAN
+static int XXH_isLittleEndian(void)
+{
+    const union { U32 u; BYTE c[4]; } one = { 1 };   /* don't use static : performance detrimental  */
+    return one.c[0];
+}
+#   define XXH_CPU_LITTLE_ENDIAN   (XXH_isLittleEndian())
+#endif
+
+
+/* ***************************
+*  Memory reads
+*****************************/
+typedef enum { XXH_aligned, XXH_unaligned } XXH_alignment;
+
+FORCE_INLINE U32 XXH_readLE32_align(const void* ptr, XXH_endianess endian, XXH_alignment align)
+{
+    if (align==XXH_unaligned)
+        return endian==XXH_littleEndian ? XXH_read32(ptr) : XXH_swap32(XXH_read32(ptr));
+    else
+        return endian==XXH_littleEndian ? *(const U32*)ptr : XXH_swap32(*(const U32*)ptr);
+}
+
+FORCE_INLINE U32 XXH_readLE32(const void* ptr, XXH_endianess endian)
+{
+    return XXH_readLE32_align(ptr, endian, XXH_unaligned);
+}
+
+static U32 XXH_readBE32(const void* ptr)
+{
+    return XXH_CPU_LITTLE_ENDIAN ? XXH_swap32(XXH_read32(ptr)) : XXH_read32(ptr);
+}
+
+
+/* *************************************
+*  Macros
+***************************************/
+#define XXH_STATIC_ASSERT(c)  do { enum { XXH_sa = 1/(int)(!!(c)) }; } while(0) /* use after variable declarations */
+XXH_PUBLIC_API unsigned XXH_versionNumber (void) { return XXH_VERSION_NUMBER; }
+
+
+/* *******************************************************************
+*  32-bit hash functions
+*********************************************************************/
+static const U32 PRIME32_1 = 2654435761U;   /* 0b10011110001101110111100110110001 */
+static const U32 PRIME32_2 = 2246822519U;   /* 0b10000101111010111100101001110111 */
+static const U32 PRIME32_3 = 3266489917U;   /* 0b11000010101100101010111000111101 */
+static const U32 PRIME32_4 =  668265263U;   /* 0b00100111110101001110101100101111 */
+static const U32 PRIME32_5 =  374761393U;   /* 0b00010110010101100110011110110001 */
+
+static U32 XXH32_round(U32 seed, U32 input)
+{
+    seed += input * PRIME32_2;
+    seed  = XXH_rotl32(seed, 13);
+    seed *= PRIME32_1;
+    return seed;
+}
+
+/* mix all bits */
+static U32 XXH32_avalanche(U32 h32)
+{
+    h32 ^= h32 >> 15;
+    h32 *= PRIME32_2;
+    h32 ^= h32 >> 13;
+    h32 *= PRIME32_3;
+    h32 ^= h32 >> 16;
+    return(h32);
+}
+
+#define XXH_get32bits(p) XXH_readLE32_align(p, endian, align)
+
+static U32
+XXH32_finalize(U32 h32, const void* ptr, size_t len,
+                XXH_endianess endian, XXH_alignment align)
+
+{
+    const BYTE* p = (const BYTE*)ptr;
+
+#define PROCESS1               \
+    h32 += (*p++) * PRIME32_5; \
+    h32 = XXH_rotl32(h32, 11) * PRIME32_1
+
+#define PROCESS4                         \
+    h32 += XXH_get32bits(p) * PRIME32_3; \
+    p+=4;                                \
+    h32  = XXH_rotl32(h32, 17) * PRIME32_4
+
+    switch(len&15)  /* or switch(bEnd - p) */
+    {
+      case 12:      PROCESS4;
+                    /* fallthrough */
+      case 8:       PROCESS4;
+                    /* fallthrough */
+      case 4:       PROCESS4;
+                    return XXH32_avalanche(h32);
+
+      case 13:      PROCESS4;
+                    /* fallthrough */
+      case 9:       PROCESS4;
+                    /* fallthrough */
+      case 5:       PROCESS4;
+                    PROCESS1;
+                    return XXH32_avalanche(h32);
+
+      case 14:      PROCESS4;
+                    /* fallthrough */
+      case 10:      PROCESS4;
+                    /* fallthrough */
+      case 6:       PROCESS4;
+                    PROCESS1;
+                    PROCESS1;
+                    return XXH32_avalanche(h32);
+
+      case 15:      PROCESS4;
+                    /* fallthrough */
+      case 11:      PROCESS4;
+                    /* fallthrough */
+      case 7:       PROCESS4;
+                    /* fallthrough */
+      case 3:       PROCESS1;
+                    /* fallthrough */
+      case 2:       PROCESS1;
+                    /* fallthrough */
+      case 1:       PROCESS1;
+                    /* fallthrough */
+      case 0:       return XXH32_avalanche(h32);
+    }
+    assert(0);
+    return h32;   /* reaching this point is deemed impossible */
+}
+
+
+FORCE_INLINE U32
+XXH32_endian_align(const void* input, size_t len, U32 seed,
+                    XXH_endianess endian, XXH_alignment align)
+{
+    const BYTE* p = (const BYTE*)input;
+    const BYTE* bEnd = p + len;
+    U32 h32;
+
+#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
+    if (p==NULL) {
+        len=0;
+        bEnd=p=(const BYTE*)(size_t)16;
+    }
+#endif
+
+    if (len>=16) {
+        const BYTE* const limit = bEnd - 15;
+        U32 v1 = seed + PRIME32_1 + PRIME32_2;
+        U32 v2 = seed + PRIME32_2;
+        U32 v3 = seed + 0;
+        U32 v4 = seed - PRIME32_1;
+
+        do {
+            v1 = XXH32_round(v1, XXH_get32bits(p)); p+=4;
+            v2 = XXH32_round(v2, XXH_get32bits(p)); p+=4;
+            v3 = XXH32_round(v3, XXH_get32bits(p)); p+=4;
+            v4 = XXH32_round(v4, XXH_get32bits(p)); p+=4;
+        } while (p < limit);
+
+        h32 = XXH_rotl32(v1, 1)  + XXH_rotl32(v2, 7)
+            + XXH_rotl32(v3, 12) + XXH_rotl32(v4, 18);
+    } else {
+        h32  = seed + PRIME32_5;
+    }
+
+    h32 += (U32)len;
+
+    return XXH32_finalize(h32, p, len&15, endian, align);
+}
+
+
+XXH_PUBLIC_API unsigned int XXH32 (const void* input, size_t len, unsigned int seed)
+{
+#if 0
+    /* Simple version, good for code maintenance, but unfortunately slow for small inputs */
+    XXH32_state_t state;
+    XXH32_reset(&state, seed);
+    XXH32_update(&state, input, len);
+    return XXH32_digest(&state);
+#else
+    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+
+    if (XXH_FORCE_ALIGN_CHECK) {
+        if ((((size_t)input) & 3) == 0) {   /* Input is 4-bytes aligned, leverage the speed benefit */
+            if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
+                return XXH32_endian_align(input, len, seed, XXH_littleEndian, XXH_aligned);
+            else
+                return XXH32_endian_align(input, len, seed, XXH_bigEndian, XXH_aligned);
+    }   }
+
+    if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
+        return XXH32_endian_align(input, len, seed, XXH_littleEndian, XXH_unaligned);
+    else
+        return XXH32_endian_align(input, len, seed, XXH_bigEndian, XXH_unaligned);
+#endif
+}
+
+
+
+/*======   Hash streaming   ======*/
+
+XXH_PUBLIC_API XXH32_state_t* XXH32_createState(void)
+{
+    return (XXH32_state_t*)XXH_malloc(sizeof(XXH32_state_t));
+}
+XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr)
+{
+    XXH_free(statePtr);
+    return XXH_OK;
+}
+
+XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* dstState, const XXH32_state_t* srcState)
+{
+    memcpy(dstState, srcState, sizeof(*dstState));
+}
+
+XXH_PUBLIC_API XXH_errorcode XXH32_reset(XXH32_state_t* statePtr, unsigned int seed)
+{
+    XXH32_state_t state;   /* using a local state to memcpy() in order to avoid strict-aliasing warnings */
+    memset(&state, 0, sizeof(state));
+    state.v1 = seed + PRIME32_1 + PRIME32_2;
+    state.v2 = seed + PRIME32_2;
+    state.v3 = seed + 0;
+    state.v4 = seed - PRIME32_1;
+    /* do not write into reserved, planned to be removed in a future version */
+    memcpy(statePtr, &state, sizeof(state) - sizeof(state.reserved));
+    return XXH_OK;
+}
+
+
+FORCE_INLINE XXH_errorcode
+XXH32_update_endian(XXH32_state_t* state, const void* input, size_t len, XXH_endianess endian)
+{
+    if (input==NULL)
+#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
+        return XXH_OK;
+#else
+        return XXH_ERROR;
+#endif
+
+    {   const BYTE* p = (const BYTE*)input;
+        const BYTE* const bEnd = p + len;
+
+        state->total_len_32 += (unsigned)len;
+        state->large_len |= (len>=16) | (state->total_len_32>=16);
+
+        if (state->memsize + len < 16)  {   /* fill in tmp buffer */
+            XXH_memcpy((BYTE*)(state->mem32) + state->memsize, input, len);
+            state->memsize += (unsigned)len;
+            return XXH_OK;
+        }
+
+        if (state->memsize) {   /* some data left from previous update */
+            XXH_memcpy((BYTE*)(state->mem32) + state->memsize, input, 16-state->memsize);
+            {   const U32* p32 = state->mem32;
+                state->v1 = XXH32_round(state->v1, XXH_readLE32(p32, endian)); p32++;
+                state->v2 = XXH32_round(state->v2, XXH_readLE32(p32, endian)); p32++;
+                state->v3 = XXH32_round(state->v3, XXH_readLE32(p32, endian)); p32++;
+                state->v4 = XXH32_round(state->v4, XXH_readLE32(p32, endian));
+            }
+            p += 16-state->memsize;
+            state->memsize = 0;
+        }
+
+        if (p <= bEnd-16) {
+            const BYTE* const limit = bEnd - 16;
+            U32 v1 = state->v1;
+            U32 v2 = state->v2;
+            U32 v3 = state->v3;
+            U32 v4 = state->v4;
+
+            do {
+                v1 = XXH32_round(v1, XXH_readLE32(p, endian)); p+=4;
+                v2 = XXH32_round(v2, XXH_readLE32(p, endian)); p+=4;
+                v3 = XXH32_round(v3, XXH_readLE32(p, endian)); p+=4;
+                v4 = XXH32_round(v4, XXH_readLE32(p, endian)); p+=4;
+            } while (p<=limit);
+
+            state->v1 = v1;
+            state->v2 = v2;
+            state->v3 = v3;
+            state->v4 = v4;
+        }
+
+        if (p < bEnd) {
+            XXH_memcpy(state->mem32, p, (size_t)(bEnd-p));
+            state->memsize = (unsigned)(bEnd-p);
+        }
+    }
+
+    return XXH_OK;
+}
+
+
+XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* state_in, const void* input, size_t len)
+{
+    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+
+    if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
+        return XXH32_update_endian(state_in, input, len, XXH_littleEndian);
+    else
+        return XXH32_update_endian(state_in, input, len, XXH_bigEndian);
+}
+
+
+FORCE_INLINE U32
+XXH32_digest_endian (const XXH32_state_t* state, XXH_endianess endian)
+{
+    U32 h32;
+
+    if (state->large_len) {
+        h32 = XXH_rotl32(state->v1, 1)
+            + XXH_rotl32(state->v2, 7)
+            + XXH_rotl32(state->v3, 12)
+            + XXH_rotl32(state->v4, 18);
+    } else {
+        h32 = state->v3 /* == seed */ + PRIME32_5;
+    }
+
+    h32 += state->total_len_32;
+
+    return XXH32_finalize(h32, state->mem32, state->memsize, endian, XXH_aligned);
+}
+
+
+XXH_PUBLIC_API unsigned int XXH32_digest (const XXH32_state_t* state_in)
+{
+    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+
+    if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
+        return XXH32_digest_endian(state_in, XXH_littleEndian);
+    else
+        return XXH32_digest_endian(state_in, XXH_bigEndian);
+}
+
+
+/*======   Canonical representation   ======*/
+
+/*! Default XXH result types are basic unsigned 32 and 64 bits.
+*   The canonical representation follows human-readable write convention, aka big-endian (large digits first).
+*   These functions allow transformation of hash result into and from its canonical format.
+*   This way, hash values can be written into a file or buffer, remaining comparable across different systems.
+*/
+
+XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash)
+{
+    XXH_STATIC_ASSERT(sizeof(XXH32_canonical_t) == sizeof(XXH32_hash_t));
+    if (XXH_CPU_LITTLE_ENDIAN) hash = XXH_swap32(hash);
+    memcpy(dst, &hash, sizeof(*dst));
+}
+
+XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src)
+{
+    return XXH_readBE32(src);
+}
+
+
+#ifndef XXH_NO_LONG_LONG
+
+/* *******************************************************************
+*  64-bit hash functions
+*********************************************************************/
+
+/*======   Memory access   ======*/
+
+#ifndef MEM_MODULE
+# define MEM_MODULE
+# if !defined (__VMS) \
+  && (defined (__cplusplus) \
+  || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
+#   include <stdint.h>
+    typedef uint64_t U64;
+# else
+    /* if compiler doesn't support unsigned long long, replace by another 64-bit type */
+    typedef unsigned long long U64;
+# endif
+#endif
+
+
+#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==2))
+
+/* Force direct memory access. Only works on CPU which support unaligned memory access in hardware */
+static U64 XXH_read64(const void* memPtr) { return *(const U64*) memPtr; }
+
+#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==1))
+
+/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
+/* currently only defined for gcc and icc */
+typedef union { U32 u32; U64 u64; } __attribute__((packed)) unalign64;
+static U64 XXH_read64(const void* ptr) { return ((const unalign64*)ptr)->u64; }
+
+#else
+
+/* portable and safe solution. Generally efficient.
+ * see : http://stackoverflow.com/a/32095106/646947
+ */
+
+static U64 XXH_read64(const void* memPtr)
+{
+    U64 val;
+    memcpy(&val, memPtr, sizeof(val));
+    return val;
+}
+
+#endif   /* XXH_FORCE_DIRECT_MEMORY_ACCESS */
+
+#if defined(_MSC_VER)     /* Visual Studio */
+#  define XXH_swap64 _byteswap_uint64
+#elif XXH_GCC_VERSION >= 403
+#  define XXH_swap64 __builtin_bswap64
+#else
+static U64 XXH_swap64 (U64 x)
+{
+    return  ((x << 56) & 0xff00000000000000ULL) |
+            ((x << 40) & 0x00ff000000000000ULL) |
+            ((x << 24) & 0x0000ff0000000000ULL) |
+            ((x << 8)  & 0x000000ff00000000ULL) |
+            ((x >> 8)  & 0x00000000ff000000ULL) |
+            ((x >> 24) & 0x0000000000ff0000ULL) |
+            ((x >> 40) & 0x000000000000ff00ULL) |
+            ((x >> 56) & 0x00000000000000ffULL);
+}
+#endif
+
+FORCE_INLINE U64 XXH_readLE64_align(const void* ptr, XXH_endianess endian, XXH_alignment align)
+{
+    if (align==XXH_unaligned)
+        return endian==XXH_littleEndian ? XXH_read64(ptr) : XXH_swap64(XXH_read64(ptr));
+    else
+        return endian==XXH_littleEndian ? *(const U64*)ptr : XXH_swap64(*(const U64*)ptr);
+}
+
+FORCE_INLINE U64 XXH_readLE64(const void* ptr, XXH_endianess endian)
+{
+    return XXH_readLE64_align(ptr, endian, XXH_unaligned);
+}
+
+static U64 XXH_readBE64(const void* ptr)
+{
+    return XXH_CPU_LITTLE_ENDIAN ? XXH_swap64(XXH_read64(ptr)) : XXH_read64(ptr);
+}
+
+
+/*======   xxh64   ======*/
+
+static const U64 PRIME64_1 = 11400714785074694791ULL;   /* 0b1001111000110111011110011011000110000101111010111100101010000111 */
+static const U64 PRIME64_2 = 14029467366897019727ULL;   /* 0b1100001010110010101011100011110100100111110101001110101101001111 */
+static const U64 PRIME64_3 =  1609587929392839161ULL;   /* 0b0001011001010110011001111011000110011110001101110111100111111001 */
+static const U64 PRIME64_4 =  9650029242287828579ULL;   /* 0b1000010111101011110010100111011111000010101100101010111001100011 */
+static const U64 PRIME64_5 =  2870177450012600261ULL;   /* 0b0010011111010100111010110010111100010110010101100110011111000101 */
+
+static U64 XXH64_round(U64 acc, U64 input)
+{
+    acc += input * PRIME64_2;
+    acc  = XXH_rotl64(acc, 31);
+    acc *= PRIME64_1;
+    return acc;
+}
+
+static U64 XXH64_mergeRound(U64 acc, U64 val)
+{
+    val  = XXH64_round(0, val);
+    acc ^= val;
+    acc  = acc * PRIME64_1 + PRIME64_4;
+    return acc;
+}
+
+static U64 XXH64_avalanche(U64 h64)
+{
+    h64 ^= h64 >> 33;
+    h64 *= PRIME64_2;
+    h64 ^= h64 >> 29;
+    h64 *= PRIME64_3;
+    h64 ^= h64 >> 32;
+    return h64;
+}
+
+
+#define XXH_get64bits(p) XXH_readLE64_align(p, endian, align)
+
+static U64
+XXH64_finalize(U64 h64, const void* ptr, size_t len,
+               XXH_endianess endian, XXH_alignment align)
+{
+    const BYTE* p = (const BYTE*)ptr;
+
+#define PROCESS1_64            \
+    h64 ^= (*p++) * PRIME64_5; \
+    h64 = XXH_rotl64(h64, 11) * PRIME64_1
+
+#define PROCESS4_64          \
+    h64 ^= (U64)(XXH_get32bits(p)) * PRIME64_1; \
+    p+=4;                    \
+    h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3
+
+#define PROCESS8_64 do {        \
+    U64 const k1 = XXH64_round(0, XXH_get64bits(p)); \
+    p+=8;                    \
+    h64 ^= k1;               \
+    h64  = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4; \
+} while (0)
+
+    switch(len&31) {
+      case 24: PROCESS8_64;
+                    /* fallthrough */
+      case 16: PROCESS8_64;
+                    /* fallthrough */
+      case  8: PROCESS8_64;
+               return XXH64_avalanche(h64);
+
+      case 28: PROCESS8_64;
+                    /* fallthrough */
+      case 20: PROCESS8_64;
+                    /* fallthrough */
+      case 12: PROCESS8_64;
+                    /* fallthrough */
+      case  4: PROCESS4_64;
+               return XXH64_avalanche(h64);
+
+      case 25: PROCESS8_64;
+                    /* fallthrough */
+      case 17: PROCESS8_64;
+                    /* fallthrough */
+      case  9: PROCESS8_64;
+               PROCESS1_64;
+               return XXH64_avalanche(h64);
+
+      case 29: PROCESS8_64;
+                    /* fallthrough */
+      case 21: PROCESS8_64;
+                    /* fallthrough */
+      case 13: PROCESS8_64;
+                    /* fallthrough */
+      case  5: PROCESS4_64;
+               PROCESS1_64;
+               return XXH64_avalanche(h64);
+
+      case 26: PROCESS8_64;
+                    /* fallthrough */
+      case 18: PROCESS8_64;
+                    /* fallthrough */
+      case 10: PROCESS8_64;
+               PROCESS1_64;
+               PROCESS1_64;
+               return XXH64_avalanche(h64);
+
+      case 30: PROCESS8_64;
+                    /* fallthrough */
+      case 22: PROCESS8_64;
+                    /* fallthrough */
+      case 14: PROCESS8_64;
+                    /* fallthrough */
+      case  6: PROCESS4_64;
+               PROCESS1_64;
+               PROCESS1_64;
+               return XXH64_avalanche(h64);
+
+      case 27: PROCESS8_64;
+                    /* fallthrough */
+      case 19: PROCESS8_64;
+                    /* fallthrough */
+      case 11: PROCESS8_64;
+               PROCESS1_64;
+               PROCESS1_64;
+               PROCESS1_64;
+               return XXH64_avalanche(h64);
+
+      case 31: PROCESS8_64;
+                    /* fallthrough */
+      case 23: PROCESS8_64;
+                    /* fallthrough */
+      case 15: PROCESS8_64;
+                    /* fallthrough */
+      case  7: PROCESS4_64;
+                    /* fallthrough */
+      case  3: PROCESS1_64;
+                    /* fallthrough */
+      case  2: PROCESS1_64;
+                    /* fallthrough */
+      case  1: PROCESS1_64;
+                    /* fallthrough */
+      case  0: return XXH64_avalanche(h64);
+    }
+
+    /* impossible to reach */
+    assert(0);
+    return 0;  /* unreachable, but some compilers complain without it */
+}
+
+FORCE_INLINE U64
+XXH64_endian_align(const void* input, size_t len, U64 seed,
+                XXH_endianess endian, XXH_alignment align)
+{
+    const BYTE* p = (const BYTE*)input;
+    const BYTE* bEnd = p + len;
+    U64 h64;
+
+#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
+    if (p==NULL) {
+        len=0;
+        bEnd=p=(const BYTE*)(size_t)32;
+    }
+#endif
+
+    if (len>=32) {
+        const BYTE* const limit = bEnd - 32;
+        U64 v1 = seed + PRIME64_1 + PRIME64_2;
+        U64 v2 = seed + PRIME64_2;
+        U64 v3 = seed + 0;
+        U64 v4 = seed - PRIME64_1;
+
+        do {
+            v1 = XXH64_round(v1, XXH_get64bits(p)); p+=8;
+            v2 = XXH64_round(v2, XXH_get64bits(p)); p+=8;
+            v3 = XXH64_round(v3, XXH_get64bits(p)); p+=8;
+            v4 = XXH64_round(v4, XXH_get64bits(p)); p+=8;
+        } while (p<=limit);
+
+        h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
+        h64 = XXH64_mergeRound(h64, v1);
+        h64 = XXH64_mergeRound(h64, v2);
+        h64 = XXH64_mergeRound(h64, v3);
+        h64 = XXH64_mergeRound(h64, v4);
+
+    } else {
+        h64  = seed + PRIME64_5;
+    }
+
+    h64 += (U64) len;
+
+    return XXH64_finalize(h64, p, len, endian, align);
+}
+
+
+XXH_PUBLIC_API unsigned long long XXH64 (const void* input, size_t len, unsigned long long seed)
+{
+#if 0
+    /* Simple version, good for code maintenance, but unfortunately slow for small inputs */
+    XXH64_state_t state;
+    XXH64_reset(&state, seed);
+    XXH64_update(&state, input, len);
+    return XXH64_digest(&state);
+#else
+    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+
+    if (XXH_FORCE_ALIGN_CHECK) {
+        if ((((size_t)input) & 7)==0) {  /* Input is aligned, let's leverage the speed advantage */
+            if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
+                return XXH64_endian_align(input, len, seed, XXH_littleEndian, XXH_aligned);
+            else
+                return XXH64_endian_align(input, len, seed, XXH_bigEndian, XXH_aligned);
+    }   }
+
+    if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
+        return XXH64_endian_align(input, len, seed, XXH_littleEndian, XXH_unaligned);
+    else
+        return XXH64_endian_align(input, len, seed, XXH_bigEndian, XXH_unaligned);
+#endif
+}
+
+/*======   Hash Streaming   ======*/
+
+XXH_PUBLIC_API XXH64_state_t* XXH64_createState(void)
+{
+    return (XXH64_state_t*)XXH_malloc(sizeof(XXH64_state_t));
+}
+XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr)
+{
+    XXH_free(statePtr);
+    return XXH_OK;
+}
+
+XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t* dstState, const XXH64_state_t* srcState)
+{
+    memcpy(dstState, srcState, sizeof(*dstState));
+}
+
+XXH_PUBLIC_API XXH_errorcode XXH64_reset(XXH64_state_t* statePtr, unsigned long long seed)
+{
+    XXH64_state_t state;   /* using a local state to memcpy() in order to avoid strict-aliasing warnings */
+    memset(&state, 0, sizeof(state));
+    state.v1 = seed + PRIME64_1 + PRIME64_2;
+    state.v2 = seed + PRIME64_2;
+    state.v3 = seed + 0;
+    state.v4 = seed - PRIME64_1;
+     /* do not write into reserved, planned to be removed in a future version */
+    memcpy(statePtr, &state, sizeof(state) - sizeof(state.reserved));
+    return XXH_OK;
+}
+
+FORCE_INLINE XXH_errorcode
+XXH64_update_endian (XXH64_state_t* state, const void* input, size_t len, XXH_endianess endian)
+{
+    if (input==NULL)
+#if defined(XXH_ACCEPT_NULL_INPUT_POINTER) && (XXH_ACCEPT_NULL_INPUT_POINTER>=1)
+        return XXH_OK;
+#else
+        return XXH_ERROR;
+#endif
+
+    {   const BYTE* p = (const BYTE*)input;
+        const BYTE* const bEnd = p + len;
+
+        state->total_len += len;
+
+        if (state->memsize + len < 32) {  /* fill in tmp buffer */
+            XXH_memcpy(((BYTE*)state->mem64) + state->memsize, input, len);
+            state->memsize += (U32)len;
+            return XXH_OK;
+        }
+
+        if (state->memsize) {   /* tmp buffer is full */
+            XXH_memcpy(((BYTE*)state->mem64) + state->memsize, input, 32-state->memsize);
+            state->v1 = XXH64_round(state->v1, XXH_readLE64(state->mem64+0, endian));
+            state->v2 = XXH64_round(state->v2, XXH_readLE64(state->mem64+1, endian));
+            state->v3 = XXH64_round(state->v3, XXH_readLE64(state->mem64+2, endian));
+            state->v4 = XXH64_round(state->v4, XXH_readLE64(state->mem64+3, endian));
+            p += 32-state->memsize;
+            state->memsize = 0;
+        }
+
+        if (p+32 <= bEnd) {
+            const BYTE* const limit = bEnd - 32;
+            U64 v1 = state->v1;
+            U64 v2 = state->v2;
+            U64 v3 = state->v3;
+            U64 v4 = state->v4;
+
+            do {
+                v1 = XXH64_round(v1, XXH_readLE64(p, endian)); p+=8;
+                v2 = XXH64_round(v2, XXH_readLE64(p, endian)); p+=8;
+                v3 = XXH64_round(v3, XXH_readLE64(p, endian)); p+=8;
+                v4 = XXH64_round(v4, XXH_readLE64(p, endian)); p+=8;
+            } while (p<=limit);
+
+            state->v1 = v1;
+            state->v2 = v2;
+            state->v3 = v3;
+            state->v4 = v4;
+        }
+
+        if (p < bEnd) {
+            XXH_memcpy(state->mem64, p, (size_t)(bEnd-p));
+            state->memsize = (unsigned)(bEnd-p);
+        }
+    }
+
+    return XXH_OK;
+}
+
+XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t* state_in, const void* input, size_t len)
+{
+    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+
+    if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
+        return XXH64_update_endian(state_in, input, len, XXH_littleEndian);
+    else
+        return XXH64_update_endian(state_in, input, len, XXH_bigEndian);
+}
+
+FORCE_INLINE U64 XXH64_digest_endian (const XXH64_state_t* state, XXH_endianess endian)
+{
+    U64 h64;
+
+    if (state->total_len >= 32) {
+        U64 const v1 = state->v1;
+        U64 const v2 = state->v2;
+        U64 const v3 = state->v3;
+        U64 const v4 = state->v4;
+
+        h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
+        h64 = XXH64_mergeRound(h64, v1);
+        h64 = XXH64_mergeRound(h64, v2);
+        h64 = XXH64_mergeRound(h64, v3);
+        h64 = XXH64_mergeRound(h64, v4);
+    } else {
+        h64  = state->v3 /*seed*/ + PRIME64_5;
+    }
+
+    h64 += (U64) state->total_len;
+
+    return XXH64_finalize(h64, state->mem64, (size_t)state->total_len, endian, XXH_aligned);
+}
+
+XXH_PUBLIC_API unsigned long long XXH64_digest (const XXH64_state_t* state_in)
+{
+    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;
+
+    if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
+        return XXH64_digest_endian(state_in, XXH_littleEndian);
+    else
+        return XXH64_digest_endian(state_in, XXH_bigEndian);
+}
+
+
+/*====== Canonical representation   ======*/
+
+XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t* dst, XXH64_hash_t hash)
+{
+    XXH_STATIC_ASSERT(sizeof(XXH64_canonical_t) == sizeof(XXH64_hash_t));
+    if (XXH_CPU_LITTLE_ENDIAN) hash = XXH_swap64(hash);
+    memcpy(dst, &hash, sizeof(*dst));
+}
+
+XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t* src)
+{
+    return XXH_readBE64(src);
+}
+
+#endif  /* XXH_NO_LONG_LONG */
diff --git a/gfx/angle/checkout/src/common/third_party/xxhash/xxhash.h b/gfx/angle/checkout/src/common/third_party/xxhash/xxhash.h
new file mode 100644
index 0000000000..0de203c947
--- /dev/null
+++ b/gfx/angle/checkout/src/common/third_party/xxhash/xxhash.h
@@ -0,0 +1,341 @@
+/*
+   xxHash - Extremely Fast Hash algorithm
+   Header File
+   Copyright (C) 2012-2016, Yann Collet.
+
+   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+       * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above
+   copyright notice, this list of conditions and the following disclaimer
+   in the documentation and/or other materials provided with the
+   distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   You can contact the author at :
+   - xxHash source repository : https://github.com/Cyan4973/xxHash
+*/
+
+/* Notice extracted from xxHash homepage :
+
+xxHash is an extremely fast Hash algorithm, running at RAM speed limits.
+It also successfully passes all tests from the SMHasher suite.
+
+Comparison (single thread, Windows Seven 32 bits, using SMHasher on a Core 2 Duo @3GHz)
+
+Name            Speed       Q.Score   Author
+xxHash          5.4 GB/s     10
+CrapWow         3.2 GB/s      2       Andrew
+MumurHash 3a    2.7 GB/s     10       Austin Appleby
+SpookyHash      2.0 GB/s     10       Bob Jenkins
+SBox            1.4 GB/s      9       Bret Mulvey
+Lookup3         1.2 GB/s      9       Bob Jenkins
+SuperFastHash   1.2 GB/s      1       Paul Hsieh
+CityHash64      1.05 GB/s    10       Pike & Alakuijala
+FNV             0.55 GB/s     5       Fowler, Noll, Vo
+CRC32           0.43 GB/s     9
+MD5-32          0.33 GB/s    10       Ronald L. Rivest
+SHA1-32         0.28 GB/s    10
+
+Q.Score is a measure of quality of the hash function.
+It depends on successfully passing SMHasher test set.
+10 is a perfect score.
+
+A 64-bit version, named XXH64, is available since r35.
+It offers much better speed, but for 64-bit applications only.
+Name     Speed on 64 bits    Speed on 32 bits
+XXH64       13.8 GB/s            1.9 GB/s
+XXH32        6.8 GB/s            6.0 GB/s
+*/
+
+#ifndef XXHASH_H_5627135585666179
+#define XXHASH_H_5627135585666179 1
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/* ****************************
+ *  Definitions
+ ******************************/
+#include <stddef.h> /* size_t */
+typedef enum
+{
+    XXH_OK = 0,
+    XXH_ERROR
+} XXH_errorcode;
+
+/* ****************************
+ *  API modifier
+ ******************************/
+/** XXH_INLINE_ALL (and XXH_PRIVATE_API)
+ *  This is useful to include xxhash functions in `static` mode
+ *  in order to inline them, and remove their symbol from the public list.
+ *  Inlining can offer dramatic performance improvement on small keys.
+ *  Methodology :
+ *     #define XXH_INLINE_ALL
+ *     #include "xxhash.h"
+ * `xxhash.c` is automatically included.
+ *  It's not useful to compile and link it as a separate module.
+ */
+#if defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)
+#    ifndef XXH_STATIC_LINKING_ONLY
+#        define XXH_STATIC_LINKING_ONLY
+#    endif
+#    if defined(__GNUC__)
+#        define XXH_PUBLIC_API static __inline __attribute__((unused))
+#elif defined(__cplusplus) || (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 \
+                                                                                           */)
+#        define XXH_PUBLIC_API static inline
+#    elif defined(_MSC_VER)
+#        define XXH_PUBLIC_API static __inline
+#    else
+/* this version may generate warnings for unused static functions */
+#        define XXH_PUBLIC_API static
+#    endif
+#else
+#    define XXH_PUBLIC_API /* do nothing */
+#endif                     /* XXH_INLINE_ALL || XXH_PRIVATE_API */
+
+/*! XXH_NAMESPACE, aka Namespace Emulation :
+ *
+ * If you want to include _and expose_ xxHash functions from within your own library,
+ * but also want to avoid symbol collisions with other libraries which may also include xxHash,
+ *
+ * you can use XXH_NAMESPACE, to automatically prefix any public symbol from xxhash library
+ * with the value of XXH_NAMESPACE (therefore, avoid NULL and numeric values).
+ *
+ * Note that no change is required within the calling program as long as it includes `xxhash.h` :
+ * regular symbol name will be automatically translated by this header.
+ */
+#ifdef XXH_NAMESPACE
+#    define XXH_CAT(A, B) A##B
+#    define XXH_NAME2(A, B) XXH_CAT(A, B)
+#    define XXH_versionNumber XXH_NAME2(XXH_NAMESPACE, XXH_versionNumber)
+#    define XXH32 XXH_NAME2(XXH_NAMESPACE, XXH32)
+#    define XXH32_createState XXH_NAME2(XXH_NAMESPACE, XXH32_createState)
+#    define XXH32_freeState XXH_NAME2(XXH_NAMESPACE, XXH32_freeState)
+#    define XXH32_reset XXH_NAME2(XXH_NAMESPACE, XXH32_reset)
+#    define XXH32_update XXH_NAME2(XXH_NAMESPACE, XXH32_update)
+#    define XXH32_digest XXH_NAME2(XXH_NAMESPACE, XXH32_digest)
+#    define XXH32_copyState XXH_NAME2(XXH_NAMESPACE, XXH32_copyState)
+#    define XXH32_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH32_canonicalFromHash)
+#    define XXH32_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH32_hashFromCanonical)
+#    define XXH64 XXH_NAME2(XXH_NAMESPACE, XXH64)
+#    define XXH64_createState XXH_NAME2(XXH_NAMESPACE, XXH64_createState)
+#    define XXH64_freeState XXH_NAME2(XXH_NAMESPACE, XXH64_freeState)
+#    define XXH64_reset XXH_NAME2(XXH_NAMESPACE, XXH64_reset)
+#    define XXH64_update XXH_NAME2(XXH_NAMESPACE, XXH64_update)
+#    define XXH64_digest XXH_NAME2(XXH_NAMESPACE, XXH64_digest)
+#    define XXH64_copyState XXH_NAME2(XXH_NAMESPACE, XXH64_copyState)
+#    define XXH64_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH64_canonicalFromHash)
+#    define XXH64_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH64_hashFromCanonical)
+#endif
+
+/* *************************************
+ *  Version
+ ***************************************/
+#define XXH_VERSION_MAJOR 0
+#define XXH_VERSION_MINOR 6
+#define XXH_VERSION_RELEASE 5
+#define XXH_VERSION_NUMBER \
+    (XXH_VERSION_MAJOR * 100 * 100 + XXH_VERSION_MINOR * 100 + XXH_VERSION_RELEASE)
+XXH_PUBLIC_API unsigned XXH_versionNumber(void);
+
+/*-**********************************************************************
+ *  32-bit hash
+ ************************************************************************/
+typedef unsigned int XXH32_hash_t;
+
+/*! XXH32() :
+    Calculate the 32-bit hash of sequence "length" bytes stored at memory address "input".
+    The memory between input & input+length must be valid (allocated and read-accessible).
+    "seed" can be used to alter the result predictably.
+    Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark) : 5.4 GB/s */
+XXH_PUBLIC_API XXH32_hash_t XXH32(const void *input, size_t length, unsigned int seed);
+
+/*======   Streaming   ======*/
+typedef struct XXH32_state_s XXH32_state_t; /* incomplete type */
+XXH_PUBLIC_API XXH32_state_t *XXH32_createState(void);
+XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t *statePtr);
+XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t *dst_state, const XXH32_state_t *src_state);
+
+XXH_PUBLIC_API XXH_errorcode XXH32_reset(XXH32_state_t *statePtr, unsigned int seed);
+XXH_PUBLIC_API XXH_errorcode XXH32_update(XXH32_state_t *statePtr,
+                                          const void *input,
+                                          size_t length);
+XXH_PUBLIC_API XXH32_hash_t XXH32_digest(const XXH32_state_t *statePtr);
+
+/*
+ * Streaming functions generate the xxHash of an input provided in multiple segments.
+ * Note that, for small input, they are slower than single-call functions, due to state
+ * management. For small inputs, prefer `XXH32()` and `XXH64()`, which are better optimized.
+ *
+ * XXH state must first be allocated, using XXH*_createState() .
+ *
+ * Start a new hash by initializing state with a seed, using XXH*_reset().
+ *
+ * Then, feed the hash state by calling XXH*_update() as many times as necessary.
+ * The function returns an error code, with 0 meaning OK, and any other value meaning there is
+ * an error.
+ *
+ * Finally, a hash value can be produced anytime, by using XXH*_digest().
+ * This function returns the nn-bits hash as an int or long long.
+ *
+ * It's still possible to continue inserting input into the hash state after a digest,
+ * and generate some new hashes later on, by calling again XXH*_digest().
+ *
+ * When done, free XXH state space if it was allocated dynamically.
+ */
+
+/*======   Canonical representation   ======*/
+
+typedef struct
+{
+    unsigned char digest[4];
+} XXH32_canonical_t;
+XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t *dst, XXH32_hash_t hash);
+XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t *src);
+
+/* Default result type for XXH functions are primitive unsigned 32 and 64 bits.
+ * The canonical representation uses human-readable write convention, aka big-endian (large
+ * digits first). These functions allow transformation of hash result into and from its
+ * canonical format. This way, hash values can be written into a file / memory, and remain
+ * comparable on different systems and programs.
+ */
+
+#ifndef XXH_NO_LONG_LONG
+/*-**********************************************************************
+ *  64-bit hash
+ ************************************************************************/
+typedef unsigned long long XXH64_hash_t;
+
+/*! XXH64() :
+    Calculate the 64-bit hash of sequence of length "len" stored at memory address "input".
+    "seed" can be used to alter the result predictably.
+    This function runs faster on 64-bit systems, but slower on 32-bit systems (see benchmark).
+*/
+XXH_PUBLIC_API XXH64_hash_t XXH64(const void *input, size_t length, unsigned long long seed);
+
+/*======   Streaming   ======*/
+typedef struct XXH64_state_s XXH64_state_t; /* incomplete type */
+XXH_PUBLIC_API XXH64_state_t *XXH64_createState(void);
+XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t *statePtr);
+XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t *dst_state, const XXH64_state_t *src_state);
+
+XXH_PUBLIC_API XXH_errorcode XXH64_reset(XXH64_state_t *statePtr, unsigned long long seed);
+XXH_PUBLIC_API XXH_errorcode XXH64_update(XXH64_state_t *statePtr,
+                                          const void *input,
+                                          size_t length);
+XXH_PUBLIC_API XXH64_hash_t XXH64_digest(const XXH64_state_t *statePtr);
+
+/*======   Canonical representation   ======*/
+typedef struct
+{
+    unsigned char digest[8];
+} XXH64_canonical_t;
+XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t *dst, XXH64_hash_t hash);
+XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t *src);
+#endif /* XXH_NO_LONG_LONG */
+
+#ifdef XXH_STATIC_LINKING_ONLY
+
+/* ================================================================================================
+   This section contains declarations which are not guaranteed to remain stable.
+   They may change in future versions, becoming incompatible with a different version of the
+library. These declarations should only be used with static linking. Never use them in
+association with dynamic linking !
+===================================================================================================
+*/
+
+/* These definitions are only present to allow
+ * static allocation of XXH state, on stack or in a struct for example.
+ * Never **ever** use members directly. */
+
+#    if !defined(__VMS) && (defined(__cplusplus) || (defined(__STDC_VERSION__) && \
+                                                     (__STDC_VERSION__ >= 199901L) /* C99 */))
+#        include <stdint.h>
+
+struct XXH32_state_s
+{
+    uint32_t total_len_32;
+    uint32_t large_len;
+    uint32_t v1;
+    uint32_t v2;
+    uint32_t v3;
+    uint32_t v4;
+    uint32_t mem32[4];
+    uint32_t memsize;
+    uint32_t reserved; /* never read nor write, might be removed in a future version */
+};                     /* typedef'd to XXH32_state_t */
+
+struct XXH64_state_s
+{
+    uint64_t total_len;
+    uint64_t v1;
+    uint64_t v2;
+    uint64_t v3;
+    uint64_t v4;
+    uint64_t mem64[4];
+    uint32_t memsize;
+    uint32_t reserved[2]; /* never read nor write, might be removed in a future version */
+};                        /* typedef'd to XXH64_state_t */
+
+#    else
+
+struct XXH32_state_s
+{
+    unsigned total_len_32;
+    unsigned large_len;
+    unsigned v1;
+    unsigned v2;
+    unsigned v3;
+    unsigned v4;
+    unsigned mem32[4];
+    unsigned memsize;
+    unsigned reserved; /* never read nor write, might be removed in a future version */
+};                     /* typedef'd to XXH32_state_t */
+
+#        ifndef XXH_NO_LONG_LONG /* remove 64-bit support */
+struct XXH64_state_s
+{
+    unsigned long long total_len;
+    unsigned long long v1;
+    unsigned long long v2;
+    unsigned long long v3;
+    unsigned long long v4;
+    unsigned long long mem64[4];
+    unsigned memsize;
+    unsigned reserved[2]; /* never read nor write, might be removed in a future version */
+};                        /* typedef'd to XXH64_state_t */
+#        endif
+
+#    endif
+
+#    if defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)
+#        include "xxhash.c" /* include xxhash function bodies as `static`, for inlining */
+#    endif
+
+#endif /* XXH_STATIC_LINKING_ONLY */
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* XXHASH_H_5627135585666179 */
diff --git a/gfx/angle/checkout/src/common/tls.cpp b/gfx/angle/checkout/src/common/tls.cpp
new file mode 100644
index 0000000000..458f5b816f
--- /dev/null
+++ b/gfx/angle/checkout/src/common/tls.cpp
@@ -0,0 +1,156 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// tls.cpp: Simple cross-platform interface for thread local storage.
+
+#include "common/tls.h"
+
+#include "common/debug.h"
+
+#ifdef ANGLE_ENABLE_WINDOWS_UWP
+#    include <map>
+#    include <mutex>
+#    include <set>
+#    include <vector>
+
+#    include <Windows.System.Threading.h>
+#    include <wrl/async.h>
+#    include <wrl/client.h>
+
+using namespace std;
+using namespace Windows::Foundation;
+using namespace ABI::Windows::System::Threading;
+
+// Thread local storage for Windows Store support
+typedef vector<void *> ThreadLocalData;
+
+static __declspec(thread) ThreadLocalData *currentThreadData = nullptr;
+static set<ThreadLocalData *> allThreadData;
+static DWORD nextTlsIndex = 0;
+static vector<DWORD> freeTlsIndices;
+
+#endif
+
+TLSIndex CreateTLSIndex(PthreadKeyDestructor destructor)
+{
+    TLSIndex index;
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+#    ifdef ANGLE_ENABLE_WINDOWS_UWP
+    if (!freeTlsIndices.empty())
+    {
+        DWORD result = freeTlsIndices.back();
+        freeTlsIndices.pop_back();
+        index = result;
+    }
+    else
+    {
+        index = nextTlsIndex++;
+    }
+#    else
+    index = TlsAlloc();
+#    endif
+
+#elif defined(ANGLE_PLATFORM_POSIX)
+    // Create pthread key
+    if ((pthread_key_create(&index, destructor)) != 0)
+    {
+        index = TLS_INVALID_INDEX;
+    }
+#endif
+
+    ASSERT(index != TLS_INVALID_INDEX && "CreateTLSIndex: Unable to allocate Thread Local Storage");
+    return index;
+}
+
+bool DestroyTLSIndex(TLSIndex index)
+{
+    ASSERT(index != TLS_INVALID_INDEX && "DestroyTLSIndex(): Invalid TLS Index");
+    if (index == TLS_INVALID_INDEX)
+    {
+        return false;
+    }
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+#    ifdef ANGLE_ENABLE_WINDOWS_UWP
+    ASSERT(index < nextTlsIndex);
+    ASSERT(find(freeTlsIndices.begin(), freeTlsIndices.end(), index) == freeTlsIndices.end());
+
+    freeTlsIndices.push_back(index);
+    for (auto threadData : allThreadData)
+    {
+        if (threadData->size() > index)
+        {
+            threadData->at(index) = nullptr;
+        }
+    }
+    return true;
+#    else
+    return (TlsFree(index) == TRUE);
+#    endif
+#elif defined(ANGLE_PLATFORM_POSIX)
+    return (pthread_key_delete(index) == 0);
+#endif
+}
+
+bool SetTLSValue(TLSIndex index, void *value)
+{
+    ASSERT(index != TLS_INVALID_INDEX && "SetTLSValue(): Invalid TLS Index");
+    if (index == TLS_INVALID_INDEX)
+    {
+        return false;
+    }
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+#    ifdef ANGLE_ENABLE_WINDOWS_UWP
+    ThreadLocalData *threadData = currentThreadData;
+    if (!threadData)
+    {
+        threadData = new ThreadLocalData(index + 1, nullptr);
+        allThreadData.insert(threadData);
+        currentThreadData = threadData;
+    }
+    else if (threadData->size() <= index)
+    {
+        threadData->resize(index + 1, nullptr);
+    }
+
+    threadData->at(index) = value;
+    return true;
+#    else
+    return (TlsSetValue(index, value) == TRUE);
+#    endif
+#elif defined(ANGLE_PLATFORM_POSIX)
+    return (pthread_setspecific(index, value) == 0);
+#endif
+}
+
+void *GetTLSValue(TLSIndex index)
+{
+    ASSERT(index != TLS_INVALID_INDEX && "GetTLSValue(): Invalid TLS Index");
+    if (index == TLS_INVALID_INDEX)
+    {
+        return nullptr;
+    }
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+#    ifdef ANGLE_ENABLE_WINDOWS_UWP
+    ThreadLocalData *threadData = currentThreadData;
+    if (threadData && threadData->size() > index)
+    {
+        return threadData->at(index);
+    }
+    else
+    {
+        return nullptr;
+    }
+#    else
+    return TlsGetValue(index);
+#    endif
+#elif defined(ANGLE_PLATFORM_POSIX)
+    return pthread_getspecific(index);
+#endif
+}
diff --git a/gfx/angle/checkout/src/common/tls.h b/gfx/angle/checkout/src/common/tls.h
new file mode 100644
index 0000000000..4075f3c030
--- /dev/null
+++ b/gfx/angle/checkout/src/common/tls.h
@@ -0,0 +1,54 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// tls.h: Simple cross-platform interface for thread local storage.
+
+#ifndef COMMON_TLS_H_
+#define COMMON_TLS_H_
+
+#include "common/angleutils.h"
+#include "common/platform.h"
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+#    include <windows.h>
+#endif
+
+namespace gl
+{
+class Context;
+}
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+
+// TLS does not exist for Windows Store and needs to be emulated
+#    ifdef ANGLE_ENABLE_WINDOWS_UWP
+#        ifndef TLS_OUT_OF_INDEXES
+#            define TLS_OUT_OF_INDEXES static_cast<DWORD>(0xFFFFFFFF)
+#        endif
+#        ifndef CREATE_SUSPENDED
+#            define CREATE_SUSPENDED 0x00000004
+#        endif
+#    endif
+typedef DWORD TLSIndex;
+#    define TLS_INVALID_INDEX (TLS_OUT_OF_INDEXES)
+#elif defined(ANGLE_PLATFORM_POSIX)
+#    include <errno.h>
+#    include <pthread.h>
+#    include <semaphore.h>
+typedef pthread_key_t TLSIndex;
+#    define TLS_INVALID_INDEX (static_cast<TLSIndex>(-1))
+#else
+#    error Unsupported platform.
+#endif
+
+using PthreadKeyDestructor = void (*)(void *);
+TLSIndex CreateTLSIndex(PthreadKeyDestructor destructor);
+bool DestroyTLSIndex(TLSIndex index);
+
+bool SetTLSValue(TLSIndex index, void *value);
+void *GetTLSValue(TLSIndex index);
+
+#endif  // COMMON_TLS_H_
diff --git a/gfx/angle/checkout/src/common/uniform_type_info_autogen.cpp b/gfx/angle/checkout/src/common/uniform_type_info_autogen.cpp
new file mode 100644
index 0000000000..70249981a8
--- /dev/null
+++ b/gfx/angle/checkout/src/common/uniform_type_info_autogen.cpp
@@ -0,0 +1,378 @@
+// GENERATED FILE - DO NOT EDIT.
+// Generated by gen_uniform_type_table.py.
+//
+// Copyright 2017 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Uniform type info table:
+//   Metadata about a particular uniform format, indexed by GL type.
+
+#include <array>
+#include "common/utilities.h"
+
+using namespace angle;
+
+namespace gl
+{
+
+namespace
+{
+constexpr std::array<UniformTypeInfo, 77> kInfoTable = {
+    {{GL_NONE, GL_NONE, GL_NONE, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum, 0, 0, 0, 0, 0 * 0,
+      0 * 0, false, false, false},
+     {GL_BOOL, GL_BOOL, GL_NONE, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, false},
+     {GL_BOOL_VEC2, GL_BOOL, GL_NONE, GL_NONE, GL_BOOL_VEC2, SamplerFormat::InvalidEnum, 1, 2, 2,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 2, false, false, false},
+     {GL_BOOL_VEC3, GL_BOOL, GL_NONE, GL_NONE, GL_BOOL_VEC3, SamplerFormat::InvalidEnum, 1, 3, 3,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 3, false, false, false},
+     {GL_BOOL_VEC4, GL_BOOL, GL_NONE, GL_NONE, GL_BOOL_VEC4, SamplerFormat::InvalidEnum, 1, 4, 4,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 4, false, false, false},
+     {GL_FLOAT, GL_FLOAT, GL_NONE, GL_NONE, GL_BOOL, SamplerFormat::InvalidEnum, 1, 1, 1,
+      sizeof(GLfloat), sizeof(GLfloat) * 4, sizeof(GLfloat) * 1, false, false, false},
+     {GL_FLOAT_MAT2, GL_FLOAT, GL_NONE, GL_FLOAT_MAT2, GL_NONE, SamplerFormat::InvalidEnum, 2, 2, 4,
+      sizeof(GLfloat), sizeof(GLfloat) * 8, sizeof(GLfloat) * 4, false, true, false},
+     {GL_FLOAT_MAT2x3, GL_FLOAT, GL_NONE, GL_FLOAT_MAT3x2, GL_NONE, SamplerFormat::InvalidEnum, 3,
+      2, 6, sizeof(GLfloat), sizeof(GLfloat) * 12, sizeof(GLfloat) * 6, false, true, false},
+     {GL_FLOAT_MAT2x4, GL_FLOAT, GL_NONE, GL_FLOAT_MAT4x2, GL_NONE, SamplerFormat::InvalidEnum, 4,
+      2, 8, sizeof(GLfloat), sizeof(GLfloat) * 16, sizeof(GLfloat) * 8, false, true, false},
+     {GL_FLOAT_MAT3, GL_FLOAT, GL_NONE, GL_FLOAT_MAT3, GL_NONE, SamplerFormat::InvalidEnum, 3, 3, 9,
+      sizeof(GLfloat), sizeof(GLfloat) * 12, sizeof(GLfloat) * 9, false, true, false},
+     {GL_FLOAT_MAT3x2, GL_FLOAT, GL_NONE, GL_FLOAT_MAT2x3, GL_NONE, SamplerFormat::InvalidEnum, 2,
+      3, 6, sizeof(GLfloat), sizeof(GLfloat) * 8, sizeof(GLfloat) * 6, false, true, false},
+     {GL_FLOAT_MAT3x4, GL_FLOAT, GL_NONE, GL_FLOAT_MAT4x3, GL_NONE, SamplerFormat::InvalidEnum, 4,
+      3, 12, sizeof(GLfloat), sizeof(GLfloat) * 16, sizeof(GLfloat) * 12, false, true, false},
+     {GL_FLOAT_MAT4, GL_FLOAT, GL_NONE, GL_FLOAT_MAT4, GL_NONE, SamplerFormat::InvalidEnum, 4, 4,
+      16, sizeof(GLfloat), sizeof(GLfloat) * 16, sizeof(GLfloat) * 16, false, true, false},
+     {GL_FLOAT_MAT4x2, GL_FLOAT, GL_NONE, GL_FLOAT_MAT2x4, GL_NONE, SamplerFormat::InvalidEnum, 2,
+      4, 8, sizeof(GLfloat), sizeof(GLfloat) * 8, sizeof(GLfloat) * 8, false, true, false},
+     {GL_FLOAT_MAT4x3, GL_FLOAT, GL_NONE, GL_FLOAT_MAT3x4, GL_NONE, SamplerFormat::InvalidEnum, 3,
+      4, 12, sizeof(GLfloat), sizeof(GLfloat) * 12, sizeof(GLfloat) * 12, false, true, false},
+     {GL_FLOAT_VEC2, GL_FLOAT, GL_NONE, GL_NONE, GL_BOOL_VEC2, SamplerFormat::InvalidEnum, 1, 2, 2,
+      sizeof(GLfloat), sizeof(GLfloat) * 4, sizeof(GLfloat) * 2, false, false, false},
+     {GL_FLOAT_VEC3, GL_FLOAT, GL_NONE, GL_NONE, GL_BOOL_VEC3, SamplerFormat::InvalidEnum, 1, 3, 3,
+      sizeof(GLfloat), sizeof(GLfloat) * 4, sizeof(GLfloat) * 3, false, false, false},
+     {GL_FLOAT_VEC4, GL_FLOAT, GL_NONE, GL_NONE, GL_BOOL_VEC4, SamplerFormat::InvalidEnum, 1, 4, 4,
+      sizeof(GLfloat), sizeof(GLfloat) * 4, sizeof(GLfloat) * 4, false, false, false},
+     {GL_IMAGE_2D, GL_INT, GL_TEXTURE_2D, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_IMAGE_2D_ARRAY, GL_INT, GL_TEXTURE_2D_ARRAY, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum,
+      1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_IMAGE_3D, GL_INT, GL_TEXTURE_3D, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_IMAGE_CUBE, GL_INT, GL_TEXTURE_CUBE_MAP, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum, 1,
+      1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_IMAGE_CUBE_MAP_ARRAY, GL_INT, GL_TEXTURE_CUBE_MAP_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1,
+      false, false, true},
+     {GL_IMAGE_BUFFER, GL_INT, GL_TEXTURE_BUFFER, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum, 1,
+      1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_INT, GL_INT, GL_NONE, GL_NONE, GL_BOOL, SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLint),
+      sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, false},
+     {GL_INT_IMAGE_2D, GL_INT, GL_TEXTURE_2D, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_INT_IMAGE_2D_ARRAY, GL_INT, GL_TEXTURE_2D_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1,
+      false, false, true},
+     {GL_INT_IMAGE_3D, GL_INT, GL_TEXTURE_3D, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_INT_IMAGE_CUBE, GL_INT, GL_TEXTURE_CUBE_MAP, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum,
+      1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_INT_IMAGE_CUBE_MAP_ARRAY, GL_INT, GL_TEXTURE_CUBE_MAP_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1,
+      false, false, true},
+     {GL_INT_IMAGE_BUFFER, GL_INT, GL_TEXTURE_BUFFER, GL_NONE, GL_NONE, SamplerFormat::InvalidEnum,
+      1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, false, false, true},
+     {GL_INT_SAMPLER_2D, GL_INT, GL_TEXTURE_2D, GL_NONE, GL_NONE, SamplerFormat::Signed, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_INT_SAMPLER_2D_ARRAY, GL_INT, GL_TEXTURE_2D_ARRAY, GL_NONE, GL_NONE, SamplerFormat::Signed,
+      1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_INT_SAMPLER_2D_MULTISAMPLE, GL_INT, GL_TEXTURE_2D_MULTISAMPLE, GL_NONE, GL_NONE,
+      SamplerFormat::Signed, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true,
+      false, false},
+     {GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY, GL_INT, GL_TEXTURE_2D_MULTISAMPLE_ARRAY, GL_NONE,
+      GL_NONE, SamplerFormat::Signed, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1,
+      true, false, false},
+     {GL_INT_SAMPLER_3D, GL_INT, GL_TEXTURE_3D, GL_NONE, GL_NONE, SamplerFormat::Signed, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_INT_SAMPLER_CUBE, GL_INT, GL_TEXTURE_CUBE_MAP, GL_NONE, GL_NONE, SamplerFormat::Signed, 1,
+      1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_INT_SAMPLER_CUBE_MAP_ARRAY, GL_INT, GL_TEXTURE_CUBE_MAP_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::Signed, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true,
+      false, false},
+     {GL_INT_SAMPLER_BUFFER, GL_INT, GL_TEXTURE_BUFFER, GL_NONE, GL_NONE, SamplerFormat::Signed, 1,
+      1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_INT_VEC2, GL_INT, GL_NONE, GL_NONE, GL_BOOL_VEC2, SamplerFormat::InvalidEnum, 1, 2, 2,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 2, false, false, false},
+     {GL_INT_VEC3, GL_INT, GL_NONE, GL_NONE, GL_BOOL_VEC3, SamplerFormat::InvalidEnum, 1, 3, 3,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 3, false, false, false},
+     {GL_INT_VEC4, GL_INT, GL_NONE, GL_NONE, GL_BOOL_VEC4, SamplerFormat::InvalidEnum, 1, 4, 4,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 4, false, false, false},
+     {GL_SAMPLER_2D, GL_INT, GL_TEXTURE_2D, GL_NONE, GL_NONE, SamplerFormat::Float, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_2D_ARRAY, GL_INT, GL_TEXTURE_2D_ARRAY, GL_NONE, GL_NONE, SamplerFormat::Float, 1,
+      1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_2D_ARRAY_SHADOW, GL_INT, GL_TEXTURE_2D_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::Shadow, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true,
+      false, false},
+     {GL_SAMPLER_2D_MULTISAMPLE, GL_INT, GL_TEXTURE_2D_MULTISAMPLE, GL_NONE, GL_NONE,
+      SamplerFormat::Float, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true,
+      false, false},
+     {GL_SAMPLER_2D_MULTISAMPLE_ARRAY, GL_INT, GL_TEXTURE_2D_MULTISAMPLE_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::Float, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true,
+      false, false},
+     {GL_SAMPLER_2D_RECT_ANGLE, GL_INT, GL_TEXTURE_2D, GL_NONE, GL_NONE, SamplerFormat::Float, 1, 1,
+      1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_2D_SHADOW, GL_INT, GL_TEXTURE_2D, GL_NONE, GL_NONE, SamplerFormat::Shadow, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_3D, GL_INT, GL_TEXTURE_3D, GL_NONE, GL_NONE, SamplerFormat::Float, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_CUBE, GL_INT, GL_TEXTURE_CUBE_MAP, GL_NONE, GL_NONE, SamplerFormat::Float, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_CUBE_MAP_ARRAY, GL_INT, GL_TEXTURE_CUBE_MAP_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::Float, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true,
+      false, false},
+     {GL_SAMPLER_BUFFER, GL_INT, GL_TEXTURE_BUFFER, GL_NONE, GL_NONE, SamplerFormat::Float, 1, 1, 1,
+      sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_CUBE_SHADOW, GL_INT, GL_TEXTURE_CUBE_MAP, GL_NONE, GL_NONE, SamplerFormat::Shadow,
+      1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW, GL_INT, GL_NONE, GL_NONE, GL_NONE, SamplerFormat::Shadow, 1,
+      1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false},
+     {GL_SAMPLER_EXTERNAL_OES, GL_INT, GL_TEXTURE_EXTERNAL_OES, GL_NONE, GL_NONE,
+      SamplerFormat::Float, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true,
+      false, false},
+     {GL_UNSIGNED_INT, GL_UNSIGNED_INT, GL_NONE, GL_NONE, GL_BOOL, SamplerFormat::InvalidEnum, 1, 1,
+      1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1, false, false, false},
+     {GL_UNSIGNED_INT_ATOMIC_COUNTER, GL_UNSIGNED_INT, GL_NONE, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      false, false, false},
+     {GL_UNSIGNED_INT_IMAGE_2D, GL_UNSIGNED_INT, GL_TEXTURE_2D, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      false, false, true},
+     {GL_UNSIGNED_INT_IMAGE_2D_ARRAY, GL_UNSIGNED_INT, GL_TEXTURE_2D_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      false, false, true},
+     {GL_UNSIGNED_INT_IMAGE_3D, GL_UNSIGNED_INT, GL_TEXTURE_3D, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      false, false, true},
+     {GL_UNSIGNED_INT_IMAGE_CUBE, GL_UNSIGNED_INT, GL_TEXTURE_CUBE_MAP, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      false, false, true},
+     {GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY, GL_UNSIGNED_INT, GL_TEXTURE_CUBE_MAP_ARRAY, GL_NONE,
+      GL_NONE, SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4,
+      sizeof(GLuint) * 1, false, false, true},
+     {GL_UNSIGNED_INT_IMAGE_BUFFER, GL_UNSIGNED_INT, GL_TEXTURE_BUFFER, GL_NONE, GL_NONE,
+      SamplerFormat::InvalidEnum, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      false, false, true},
+     {GL_UNSIGNED_INT_SAMPLER_2D, GL_UNSIGNED_INT, GL_TEXTURE_2D, GL_NONE, GL_NONE,
+      SamplerFormat::Unsigned, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      true, false, false},
+     {GL_UNSIGNED_INT_SAMPLER_2D_ARRAY, GL_UNSIGNED_INT, GL_TEXTURE_2D_ARRAY, GL_NONE, GL_NONE,
+      SamplerFormat::Unsigned, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      true, false, false},
+     {GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE, GL_UNSIGNED_INT, GL_TEXTURE_2D_MULTISAMPLE, GL_NONE,
+      GL_NONE, SamplerFormat::Unsigned, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4,
+      sizeof(GLuint) * 1, true, false, false},
+     {GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY, GL_UNSIGNED_INT,
+      GL_TEXTURE_2D_MULTISAMPLE_ARRAY, GL_NONE, GL_NONE, SamplerFormat::Unsigned, 1, 1, 1,
+      sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1, true, false, false},
+     {GL_UNSIGNED_INT_SAMPLER_3D, GL_UNSIGNED_INT, GL_TEXTURE_3D, GL_NONE, GL_NONE,
+      SamplerFormat::Unsigned, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      true, false, false},
+     {GL_UNSIGNED_INT_SAMPLER_CUBE, GL_UNSIGNED_INT, GL_TEXTURE_CUBE_MAP, GL_NONE, GL_NONE,
+      SamplerFormat::Unsigned, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      true, false, false},
+     {GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY, GL_UNSIGNED_INT, GL_TEXTURE_CUBE_MAP_ARRAY, GL_NONE,
+      GL_NONE, SamplerFormat::Unsigned, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4,
+      sizeof(GLuint) * 1, true, false, false},
+     {GL_UNSIGNED_INT_SAMPLER_BUFFER, GL_UNSIGNED_INT, GL_TEXTURE_BUFFER, GL_NONE, GL_NONE,
+      SamplerFormat::Unsigned, 1, 1, 1, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 1,
+      true, false, false},
+     {GL_UNSIGNED_INT_VEC2, GL_UNSIGNED_INT, GL_NONE, GL_NONE, GL_BOOL_VEC2,
+      SamplerFormat::InvalidEnum, 1, 2, 2, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 2,
+      false, false, false},
+     {GL_UNSIGNED_INT_VEC3, GL_UNSIGNED_INT, GL_NONE, GL_NONE, GL_BOOL_VEC3,
+      SamplerFormat::InvalidEnum, 1, 3, 3, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 3,
+      false, false, false},
+     {GL_UNSIGNED_INT_VEC4, GL_UNSIGNED_INT, GL_NONE, GL_NONE, GL_BOOL_VEC4,
+      SamplerFormat::InvalidEnum, 1, 4, 4, sizeof(GLuint), sizeof(GLuint) * 4, sizeof(GLuint) * 4,
+      false, false, false},
+     {GL_SAMPLER_VIDEO_IMAGE_WEBGL, GL_INT, GL_TEXTURE_VIDEO_IMAGE_WEBGL, GL_NONE, GL_NONE,
+      SamplerFormat::Float, 1, 1, 1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true,
+      false, false},
+     {GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT, GL_INT, GL_NONE, GL_NONE, GL_NONE, SamplerFormat::Float, 1, 1,
+      1, sizeof(GLint), sizeof(GLint) * 4, sizeof(GLint) * 1, true, false, false}}};
+
+size_t GetTypeInfoIndex(GLenum uniformType)
+{
+    switch (uniformType)
+    {
+        case GL_NONE:
+            return 0;
+        case GL_BOOL:
+            return 1;
+        case GL_BOOL_VEC2:
+            return 2;
+        case GL_BOOL_VEC3:
+            return 3;
+        case GL_BOOL_VEC4:
+            return 4;
+        case GL_FLOAT:
+            return 5;
+        case GL_FLOAT_MAT2:
+            return 6;
+        case GL_FLOAT_MAT2x3:
+            return 7;
+        case GL_FLOAT_MAT2x4:
+            return 8;
+        case GL_FLOAT_MAT3:
+            return 9;
+        case GL_FLOAT_MAT3x2:
+            return 10;
+        case GL_FLOAT_MAT3x4:
+            return 11;
+        case GL_FLOAT_MAT4:
+            return 12;
+        case GL_FLOAT_MAT4x2:
+            return 13;
+        case GL_FLOAT_MAT4x3:
+            return 14;
+        case GL_FLOAT_VEC2:
+            return 15;
+        case GL_FLOAT_VEC3:
+            return 16;
+        case GL_FLOAT_VEC4:
+            return 17;
+        case GL_IMAGE_2D:
+            return 18;
+        case GL_IMAGE_2D_ARRAY:
+            return 19;
+        case GL_IMAGE_3D:
+            return 20;
+        case GL_IMAGE_CUBE:
+            return 21;
+        case GL_IMAGE_CUBE_MAP_ARRAY:
+            return 22;
+        case GL_IMAGE_BUFFER:
+            return 23;
+        case GL_INT:
+            return 24;
+        case GL_INT_IMAGE_2D:
+            return 25;
+        case GL_INT_IMAGE_2D_ARRAY:
+            return 26;
+        case GL_INT_IMAGE_3D:
+            return 27;
+        case GL_INT_IMAGE_CUBE:
+            return 28;
+        case GL_INT_IMAGE_CUBE_MAP_ARRAY:
+            return 29;
+        case GL_INT_IMAGE_BUFFER:
+            return 30;
+        case GL_INT_SAMPLER_2D:
+            return 31;
+        case GL_INT_SAMPLER_2D_ARRAY:
+            return 32;
+        case GL_INT_SAMPLER_2D_MULTISAMPLE:
+            return 33;
+        case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+            return 34;
+        case GL_INT_SAMPLER_3D:
+            return 35;
+        case GL_INT_SAMPLER_CUBE:
+            return 36;
+        case GL_INT_SAMPLER_CUBE_MAP_ARRAY:
+            return 37;
+        case GL_INT_SAMPLER_BUFFER:
+            return 38;
+        case GL_INT_VEC2:
+            return 39;
+        case GL_INT_VEC3:
+            return 40;
+        case GL_INT_VEC4:
+            return 41;
+        case GL_SAMPLER_2D:
+            return 42;
+        case GL_SAMPLER_2D_ARRAY:
+            return 43;
+        case GL_SAMPLER_2D_ARRAY_SHADOW:
+            return 44;
+        case GL_SAMPLER_2D_MULTISAMPLE:
+            return 45;
+        case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:
+            return 46;
+        case GL_SAMPLER_2D_RECT_ANGLE:
+            return 47;
+        case GL_SAMPLER_2D_SHADOW:
+            return 48;
+        case GL_SAMPLER_3D:
+            return 49;
+        case GL_SAMPLER_CUBE:
+            return 50;
+        case GL_SAMPLER_CUBE_MAP_ARRAY:
+            return 51;
+        case GL_SAMPLER_BUFFER:
+            return 52;
+        case GL_SAMPLER_CUBE_SHADOW:
+            return 53;
+        case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:
+            return 54;
+        case GL_SAMPLER_EXTERNAL_OES:
+            return 55;
+        case GL_UNSIGNED_INT:
+            return 56;
+        case GL_UNSIGNED_INT_ATOMIC_COUNTER:
+            return 57;
+        case GL_UNSIGNED_INT_IMAGE_2D:
+            return 58;
+        case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+            return 59;
+        case GL_UNSIGNED_INT_IMAGE_3D:
+            return 60;
+        case GL_UNSIGNED_INT_IMAGE_CUBE:
+            return 61;
+        case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
+            return 62;
+        case GL_UNSIGNED_INT_IMAGE_BUFFER:
+            return 63;
+        case GL_UNSIGNED_INT_SAMPLER_2D:
+            return 64;
+        case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
+            return 65;
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:
+            return 66;
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+            return 67;
+        case GL_UNSIGNED_INT_SAMPLER_3D:
+            return 68;
+        case GL_UNSIGNED_INT_SAMPLER_CUBE:
+            return 69;
+        case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:
+            return 70;
+        case GL_UNSIGNED_INT_SAMPLER_BUFFER:
+            return 71;
+        case GL_UNSIGNED_INT_VEC2:
+            return 72;
+        case GL_UNSIGNED_INT_VEC3:
+            return 73;
+        case GL_UNSIGNED_INT_VEC4:
+            return 74;
+        case GL_SAMPLER_VIDEO_IMAGE_WEBGL:
+            return 75;
+        case GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT:
+            return 76;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+}  // anonymous namespace
+
+const UniformTypeInfo &GetUniformTypeInfo(GLenum uniformType)
+{
+    ASSERT(kInfoTable[GetTypeInfoIndex(uniformType)].type == uniformType);
+    return kInfoTable[GetTypeInfoIndex(uniformType)];
+}
+
+}  // namespace gl
diff --git a/gfx/angle/checkout/src/common/utilities.cpp b/gfx/angle/checkout/src/common/utilities.cpp
new file mode 100644
index 0000000000..f08774523c
--- /dev/null
+++ b/gfx/angle/checkout/src/common/utilities.cpp
@@ -0,0 +1,1509 @@
+//
+// Copyright 2002 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// utilities.cpp: Conversion functions and other utility routines.
+
+#include "common/utilities.h"
+#include "GLES3/gl3.h"
+#include "common/mathutil.h"
+#include "common/platform.h"
+#include "common/string_utils.h"
+
+#include <set>
+
+#if defined(ANGLE_ENABLE_WINDOWS_UWP)
+#    include <windows.applicationmodel.core.h>
+#    include <windows.graphics.display.h>
+#    include <wrl.h>
+#    include <wrl/wrappers/corewrappers.h>
+#endif
+
+namespace
+{
+
+template <class IndexType>
+gl::IndexRange ComputeTypedIndexRange(const IndexType *indices,
+                                      size_t count,
+                                      bool primitiveRestartEnabled,
+                                      GLuint primitiveRestartIndex)
+{
+    ASSERT(count > 0);
+
+    IndexType minIndex                = 0;
+    IndexType maxIndex                = 0;
+    size_t nonPrimitiveRestartIndices = 0;
+
+    if (primitiveRestartEnabled)
+    {
+        // Find the first non-primitive restart index to initialize the min and max values
+        size_t i = 0;
+        for (; i < count; i++)
+        {
+            if (indices[i] != primitiveRestartIndex)
+            {
+                minIndex = indices[i];
+                maxIndex = indices[i];
+                nonPrimitiveRestartIndices++;
+                break;
+            }
+        }
+
+        // Loop over the rest of the indices
+        for (; i < count; i++)
+        {
+            if (indices[i] != primitiveRestartIndex)
+            {
+                if (minIndex > indices[i])
+                {
+                    minIndex = indices[i];
+                }
+                if (maxIndex < indices[i])
+                {
+                    maxIndex = indices[i];
+                }
+                nonPrimitiveRestartIndices++;
+            }
+        }
+    }
+    else
+    {
+        minIndex                   = indices[0];
+        maxIndex                   = indices[0];
+        nonPrimitiveRestartIndices = count;
+
+        for (size_t i = 1; i < count; i++)
+        {
+            if (minIndex > indices[i])
+            {
+                minIndex = indices[i];
+            }
+            if (maxIndex < indices[i])
+            {
+                maxIndex = indices[i];
+            }
+        }
+    }
+
+    return gl::IndexRange(static_cast<size_t>(minIndex), static_cast<size_t>(maxIndex),
+                          nonPrimitiveRestartIndices);
+}
+
+}  // anonymous namespace
+
+namespace gl
+{
+
+int VariableComponentCount(GLenum type)
+{
+    return VariableRowCount(type) * VariableColumnCount(type);
+}
+
+GLenum VariableComponentType(GLenum type)
+{
+    switch (type)
+    {
+        case GL_BOOL:
+        case GL_BOOL_VEC2:
+        case GL_BOOL_VEC3:
+        case GL_BOOL_VEC4:
+            return GL_BOOL;
+        case GL_FLOAT:
+        case GL_FLOAT_VEC2:
+        case GL_FLOAT_VEC3:
+        case GL_FLOAT_VEC4:
+        case GL_FLOAT_MAT2:
+        case GL_FLOAT_MAT3:
+        case GL_FLOAT_MAT4:
+        case GL_FLOAT_MAT2x3:
+        case GL_FLOAT_MAT3x2:
+        case GL_FLOAT_MAT2x4:
+        case GL_FLOAT_MAT4x2:
+        case GL_FLOAT_MAT3x4:
+        case GL_FLOAT_MAT4x3:
+            return GL_FLOAT;
+        case GL_INT:
+        case GL_SAMPLER_2D:
+        case GL_SAMPLER_2D_RECT_ANGLE:
+        case GL_SAMPLER_3D:
+        case GL_SAMPLER_CUBE:
+        case GL_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_SAMPLER_2D_ARRAY:
+        case GL_SAMPLER_EXTERNAL_OES:
+        case GL_SAMPLER_2D_MULTISAMPLE:
+        case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_INT_SAMPLER_BUFFER:
+        case GL_INT_SAMPLER_2D:
+        case GL_INT_SAMPLER_3D:
+        case GL_INT_SAMPLER_CUBE:
+        case GL_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_INT_SAMPLER_2D_ARRAY:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D:
+        case GL_UNSIGNED_INT_SAMPLER_3D:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_SAMPLER_2D_SHADOW:
+        case GL_SAMPLER_BUFFER:
+        case GL_SAMPLER_CUBE_SHADOW:
+        case GL_SAMPLER_2D_ARRAY_SHADOW:
+        case GL_INT_VEC2:
+        case GL_INT_VEC3:
+        case GL_INT_VEC4:
+        case GL_IMAGE_2D:
+        case GL_INT_IMAGE_2D:
+        case GL_UNSIGNED_INT_IMAGE_2D:
+        case GL_IMAGE_3D:
+        case GL_INT_IMAGE_3D:
+        case GL_UNSIGNED_INT_IMAGE_3D:
+        case GL_IMAGE_2D_ARRAY:
+        case GL_INT_IMAGE_2D_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+        case GL_IMAGE_CUBE:
+        case GL_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_IMAGE_CUBE:
+        case GL_IMAGE_CUBE_MAP_ARRAY:
+        case GL_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_IMAGE_BUFFER:
+        case GL_INT_IMAGE_BUFFER:
+        case GL_UNSIGNED_INT_SAMPLER_BUFFER:
+        case GL_UNSIGNED_INT_IMAGE_BUFFER:
+        case GL_UNSIGNED_INT_ATOMIC_COUNTER:
+        case GL_SAMPLER_VIDEO_IMAGE_WEBGL:
+        case GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT:
+            return GL_INT;
+        case GL_UNSIGNED_INT:
+        case GL_UNSIGNED_INT_VEC2:
+        case GL_UNSIGNED_INT_VEC3:
+        case GL_UNSIGNED_INT_VEC4:
+            return GL_UNSIGNED_INT;
+        default:
+            UNREACHABLE();
+    }
+
+    return GL_NONE;
+}
+
+size_t VariableComponentSize(GLenum type)
+{
+    switch (type)
+    {
+        case GL_BOOL:
+            return sizeof(GLint);
+        case GL_FLOAT:
+            return sizeof(GLfloat);
+        case GL_INT:
+            return sizeof(GLint);
+        case GL_UNSIGNED_INT:
+            return sizeof(GLuint);
+        default:
+            UNREACHABLE();
+    }
+
+    return 0;
+}
+
+size_t VariableInternalSize(GLenum type)
+{
+    // Expanded to 4-element vectors
+    return VariableComponentSize(VariableComponentType(type)) * VariableRowCount(type) * 4;
+}
+
+size_t VariableExternalSize(GLenum type)
+{
+    return VariableComponentSize(VariableComponentType(type)) * VariableComponentCount(type);
+}
+
+std::string GetGLSLTypeString(GLenum type)
+{
+    switch (type)
+    {
+        case GL_BOOL:
+            return "bool";
+        case GL_INT:
+            return "int";
+        case GL_UNSIGNED_INT:
+            return "uint";
+        case GL_FLOAT:
+            return "float";
+        case GL_BOOL_VEC2:
+            return "bvec2";
+        case GL_BOOL_VEC3:
+            return "bvec3";
+        case GL_BOOL_VEC4:
+            return "bvec4";
+        case GL_INT_VEC2:
+            return "ivec2";
+        case GL_INT_VEC3:
+            return "ivec3";
+        case GL_INT_VEC4:
+            return "ivec4";
+        case GL_FLOAT_VEC2:
+            return "vec2";
+        case GL_FLOAT_VEC3:
+            return "vec3";
+        case GL_FLOAT_VEC4:
+            return "vec4";
+        case GL_UNSIGNED_INT_VEC2:
+            return "uvec2";
+        case GL_UNSIGNED_INT_VEC3:
+            return "uvec3";
+        case GL_UNSIGNED_INT_VEC4:
+            return "uvec4";
+        case GL_FLOAT_MAT2:
+            return "mat2";
+        case GL_FLOAT_MAT3:
+            return "mat3";
+        case GL_FLOAT_MAT4:
+            return "mat4";
+        default:
+            UNREACHABLE();
+            return "";
+    }
+}
+
+GLenum VariableBoolVectorType(GLenum type)
+{
+    switch (type)
+    {
+        case GL_FLOAT:
+        case GL_INT:
+        case GL_UNSIGNED_INT:
+            return GL_BOOL;
+        case GL_FLOAT_VEC2:
+        case GL_INT_VEC2:
+        case GL_UNSIGNED_INT_VEC2:
+            return GL_BOOL_VEC2;
+        case GL_FLOAT_VEC3:
+        case GL_INT_VEC3:
+        case GL_UNSIGNED_INT_VEC3:
+            return GL_BOOL_VEC3;
+        case GL_FLOAT_VEC4:
+        case GL_INT_VEC4:
+        case GL_UNSIGNED_INT_VEC4:
+            return GL_BOOL_VEC4;
+
+        default:
+            UNREACHABLE();
+            return GL_NONE;
+    }
+}
+
+int VariableRowCount(GLenum type)
+{
+    switch (type)
+    {
+        case GL_NONE:
+            return 0;
+        case GL_BOOL:
+        case GL_FLOAT:
+        case GL_INT:
+        case GL_UNSIGNED_INT:
+        case GL_BOOL_VEC2:
+        case GL_FLOAT_VEC2:
+        case GL_INT_VEC2:
+        case GL_UNSIGNED_INT_VEC2:
+        case GL_BOOL_VEC3:
+        case GL_FLOAT_VEC3:
+        case GL_INT_VEC3:
+        case GL_UNSIGNED_INT_VEC3:
+        case GL_BOOL_VEC4:
+        case GL_FLOAT_VEC4:
+        case GL_INT_VEC4:
+        case GL_UNSIGNED_INT_VEC4:
+        case GL_SAMPLER_2D:
+        case GL_SAMPLER_3D:
+        case GL_SAMPLER_CUBE:
+        case GL_SAMPLER_2D_ARRAY:
+        case GL_SAMPLER_EXTERNAL_OES:
+        case GL_SAMPLER_2D_RECT_ANGLE:
+        case GL_SAMPLER_2D_MULTISAMPLE:
+        case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_SAMPLER_BUFFER:
+        case GL_INT_SAMPLER_2D:
+        case GL_INT_SAMPLER_3D:
+        case GL_INT_SAMPLER_CUBE:
+        case GL_INT_SAMPLER_2D_ARRAY:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_INT_SAMPLER_BUFFER:
+        case GL_UNSIGNED_INT_SAMPLER_2D:
+        case GL_UNSIGNED_INT_SAMPLER_3D:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_BUFFER:
+        case GL_SAMPLER_2D_SHADOW:
+        case GL_SAMPLER_CUBE_SHADOW:
+        case GL_SAMPLER_2D_ARRAY_SHADOW:
+        case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:
+        case GL_IMAGE_2D:
+        case GL_INT_IMAGE_2D:
+        case GL_UNSIGNED_INT_IMAGE_2D:
+        case GL_IMAGE_2D_ARRAY:
+        case GL_INT_IMAGE_2D_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+        case GL_IMAGE_3D:
+        case GL_INT_IMAGE_3D:
+        case GL_UNSIGNED_INT_IMAGE_3D:
+        case GL_IMAGE_CUBE:
+        case GL_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_ATOMIC_COUNTER:
+        case GL_IMAGE_CUBE_MAP_ARRAY:
+        case GL_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_IMAGE_BUFFER:
+        case GL_INT_IMAGE_BUFFER:
+        case GL_UNSIGNED_INT_IMAGE_BUFFER:
+        case GL_SAMPLER_VIDEO_IMAGE_WEBGL:
+        case GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT:
+            return 1;
+        case GL_FLOAT_MAT2:
+        case GL_FLOAT_MAT3x2:
+        case GL_FLOAT_MAT4x2:
+            return 2;
+        case GL_FLOAT_MAT3:
+        case GL_FLOAT_MAT2x3:
+        case GL_FLOAT_MAT4x3:
+            return 3;
+        case GL_FLOAT_MAT4:
+        case GL_FLOAT_MAT2x4:
+        case GL_FLOAT_MAT3x4:
+            return 4;
+        default:
+            UNREACHABLE();
+    }
+
+    return 0;
+}
+
+int VariableColumnCount(GLenum type)
+{
+    switch (type)
+    {
+        case GL_NONE:
+            return 0;
+        case GL_BOOL:
+        case GL_FLOAT:
+        case GL_INT:
+        case GL_UNSIGNED_INT:
+        case GL_SAMPLER_2D:
+        case GL_SAMPLER_3D:
+        case GL_SAMPLER_CUBE:
+        case GL_SAMPLER_2D_ARRAY:
+        case GL_SAMPLER_2D_MULTISAMPLE:
+        case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_SAMPLER_BUFFER:
+        case GL_INT_SAMPLER_2D:
+        case GL_INT_SAMPLER_3D:
+        case GL_INT_SAMPLER_CUBE:
+        case GL_INT_SAMPLER_2D_ARRAY:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_INT_SAMPLER_BUFFER:
+        case GL_SAMPLER_EXTERNAL_OES:
+        case GL_SAMPLER_2D_RECT_ANGLE:
+        case GL_UNSIGNED_INT_SAMPLER_2D:
+        case GL_UNSIGNED_INT_SAMPLER_3D:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_BUFFER:
+        case GL_SAMPLER_2D_SHADOW:
+        case GL_SAMPLER_CUBE_SHADOW:
+        case GL_SAMPLER_2D_ARRAY_SHADOW:
+        case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:
+        case GL_IMAGE_2D:
+        case GL_INT_IMAGE_2D:
+        case GL_UNSIGNED_INT_IMAGE_2D:
+        case GL_IMAGE_3D:
+        case GL_INT_IMAGE_3D:
+        case GL_UNSIGNED_INT_IMAGE_3D:
+        case GL_IMAGE_2D_ARRAY:
+        case GL_INT_IMAGE_2D_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+        case GL_IMAGE_CUBE_MAP_ARRAY:
+        case GL_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_IMAGE_BUFFER:
+        case GL_INT_IMAGE_BUFFER:
+        case GL_UNSIGNED_INT_IMAGE_BUFFER:
+        case GL_IMAGE_CUBE:
+        case GL_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_ATOMIC_COUNTER:
+        case GL_SAMPLER_VIDEO_IMAGE_WEBGL:
+        case GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT:
+            return 1;
+        case GL_BOOL_VEC2:
+        case GL_FLOAT_VEC2:
+        case GL_INT_VEC2:
+        case GL_UNSIGNED_INT_VEC2:
+        case GL_FLOAT_MAT2:
+        case GL_FLOAT_MAT2x3:
+        case GL_FLOAT_MAT2x4:
+            return 2;
+        case GL_BOOL_VEC3:
+        case GL_FLOAT_VEC3:
+        case GL_INT_VEC3:
+        case GL_UNSIGNED_INT_VEC3:
+        case GL_FLOAT_MAT3:
+        case GL_FLOAT_MAT3x2:
+        case GL_FLOAT_MAT3x4:
+            return 3;
+        case GL_BOOL_VEC4:
+        case GL_FLOAT_VEC4:
+        case GL_INT_VEC4:
+        case GL_UNSIGNED_INT_VEC4:
+        case GL_FLOAT_MAT4:
+        case GL_FLOAT_MAT4x2:
+        case GL_FLOAT_MAT4x3:
+            return 4;
+        default:
+            UNREACHABLE();
+    }
+
+    return 0;
+}
+
+bool IsSamplerType(GLenum type)
+{
+    switch (type)
+    {
+        case GL_SAMPLER_2D:
+        case GL_SAMPLER_3D:
+        case GL_SAMPLER_CUBE:
+        case GL_SAMPLER_2D_ARRAY:
+        case GL_SAMPLER_EXTERNAL_OES:
+        case GL_SAMPLER_2D_MULTISAMPLE:
+        case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_SAMPLER_BUFFER:
+        case GL_SAMPLER_2D_RECT_ANGLE:
+        case GL_INT_SAMPLER_2D:
+        case GL_INT_SAMPLER_3D:
+        case GL_INT_SAMPLER_CUBE:
+        case GL_INT_SAMPLER_2D_ARRAY:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_INT_SAMPLER_BUFFER:
+        case GL_UNSIGNED_INT_SAMPLER_2D:
+        case GL_UNSIGNED_INT_SAMPLER_3D:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_BUFFER:
+        case GL_SAMPLER_2D_SHADOW:
+        case GL_SAMPLER_CUBE_SHADOW:
+        case GL_SAMPLER_2D_ARRAY_SHADOW:
+        case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:
+        case GL_SAMPLER_VIDEO_IMAGE_WEBGL:
+        case GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT:
+            return true;
+    }
+
+    return false;
+}
+
+bool IsSamplerCubeType(GLenum type)
+{
+    switch (type)
+    {
+        case GL_SAMPLER_CUBE:
+        case GL_INT_SAMPLER_CUBE:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE:
+        case GL_SAMPLER_CUBE_SHADOW:
+            return true;
+    }
+
+    return false;
+}
+
+bool IsSamplerYUVType(GLenum type)
+{
+    switch (type)
+    {
+        case GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT:
+            return true;
+
+        default:
+            return false;
+    }
+}
+
+bool IsImageType(GLenum type)
+{
+    switch (type)
+    {
+        case GL_IMAGE_2D:
+        case GL_INT_IMAGE_2D:
+        case GL_UNSIGNED_INT_IMAGE_2D:
+        case GL_IMAGE_3D:
+        case GL_INT_IMAGE_3D:
+        case GL_UNSIGNED_INT_IMAGE_3D:
+        case GL_IMAGE_2D_ARRAY:
+        case GL_INT_IMAGE_2D_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+        case GL_IMAGE_CUBE_MAP_ARRAY:
+        case GL_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_IMAGE_BUFFER:
+        case GL_INT_IMAGE_BUFFER:
+        case GL_UNSIGNED_INT_IMAGE_BUFFER:
+        case GL_IMAGE_CUBE:
+        case GL_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_IMAGE_CUBE:
+            return true;
+    }
+    return false;
+}
+
+bool IsImage2DType(GLenum type)
+{
+    switch (type)
+    {
+        case GL_IMAGE_2D:
+        case GL_INT_IMAGE_2D:
+        case GL_UNSIGNED_INT_IMAGE_2D:
+            return true;
+        case GL_IMAGE_3D:
+        case GL_INT_IMAGE_3D:
+        case GL_UNSIGNED_INT_IMAGE_3D:
+        case GL_IMAGE_2D_ARRAY:
+        case GL_INT_IMAGE_2D_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+        case GL_IMAGE_CUBE_MAP_ARRAY:
+        case GL_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
+        case GL_IMAGE_CUBE:
+        case GL_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_IMAGE_CUBE:
+        case GL_IMAGE_BUFFER:
+        case GL_INT_IMAGE_BUFFER:
+        case GL_UNSIGNED_INT_IMAGE_BUFFER:
+            return false;
+        default:
+            UNREACHABLE();
+            return false;
+    }
+}
+
+bool IsAtomicCounterType(GLenum type)
+{
+    return type == GL_UNSIGNED_INT_ATOMIC_COUNTER;
+}
+
+bool IsOpaqueType(GLenum type)
+{
+    // ESSL 3.10 section 4.1.7 defines opaque types as: samplers, images and atomic counters.
+    return IsImageType(type) || IsSamplerType(type) || IsAtomicCounterType(type);
+}
+
+bool IsMatrixType(GLenum type)
+{
+    return VariableRowCount(type) > 1;
+}
+
+GLenum TransposeMatrixType(GLenum type)
+{
+    if (!IsMatrixType(type))
+    {
+        return type;
+    }
+
+    switch (type)
+    {
+        case GL_FLOAT_MAT2:
+            return GL_FLOAT_MAT2;
+        case GL_FLOAT_MAT3:
+            return GL_FLOAT_MAT3;
+        case GL_FLOAT_MAT4:
+            return GL_FLOAT_MAT4;
+        case GL_FLOAT_MAT2x3:
+            return GL_FLOAT_MAT3x2;
+        case GL_FLOAT_MAT3x2:
+            return GL_FLOAT_MAT2x3;
+        case GL_FLOAT_MAT2x4:
+            return GL_FLOAT_MAT4x2;
+        case GL_FLOAT_MAT4x2:
+            return GL_FLOAT_MAT2x4;
+        case GL_FLOAT_MAT3x4:
+            return GL_FLOAT_MAT4x3;
+        case GL_FLOAT_MAT4x3:
+            return GL_FLOAT_MAT3x4;
+        default:
+            UNREACHABLE();
+            return GL_NONE;
+    }
+}
+
+int MatrixRegisterCount(GLenum type, bool isRowMajorMatrix)
+{
+    ASSERT(IsMatrixType(type));
+    return isRowMajorMatrix ? VariableRowCount(type) : VariableColumnCount(type);
+}
+
+int MatrixComponentCount(GLenum type, bool isRowMajorMatrix)
+{
+    ASSERT(IsMatrixType(type));
+    return isRowMajorMatrix ? VariableColumnCount(type) : VariableRowCount(type);
+}
+
+int VariableRegisterCount(GLenum type)
+{
+    return IsMatrixType(type) ? VariableColumnCount(type) : 1;
+}
+
+int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize)
+{
+    ASSERT(allocationSize <= bitsSize);
+
+    unsigned int mask = std::numeric_limits<unsigned int>::max() >>
+                        (std::numeric_limits<unsigned int>::digits - allocationSize);
+
+    for (unsigned int i = 0; i < bitsSize - allocationSize + 1; i++)
+    {
+        if ((*bits & mask) == 0)
+        {
+            *bits |= mask;
+            return i;
+        }
+
+        mask <<= 1;
+    }
+
+    return -1;
+}
+
+IndexRange ComputeIndexRange(DrawElementsType indexType,
+                             const GLvoid *indices,
+                             size_t count,
+                             bool primitiveRestartEnabled)
+{
+    switch (indexType)
+    {
+        case DrawElementsType::UnsignedByte:
+            return ComputeTypedIndexRange(static_cast<const GLubyte *>(indices), count,
+                                          primitiveRestartEnabled,
+                                          GetPrimitiveRestartIndex(indexType));
+        case DrawElementsType::UnsignedShort:
+            return ComputeTypedIndexRange(static_cast<const GLushort *>(indices), count,
+                                          primitiveRestartEnabled,
+                                          GetPrimitiveRestartIndex(indexType));
+        case DrawElementsType::UnsignedInt:
+            return ComputeTypedIndexRange(static_cast<const GLuint *>(indices), count,
+                                          primitiveRestartEnabled,
+                                          GetPrimitiveRestartIndex(indexType));
+        default:
+            UNREACHABLE();
+            return IndexRange();
+    }
+}
+
+GLuint GetPrimitiveRestartIndex(DrawElementsType indexType)
+{
+    switch (indexType)
+    {
+        case DrawElementsType::UnsignedByte:
+            return 0xFF;
+        case DrawElementsType::UnsignedShort:
+            return 0xFFFF;
+        case DrawElementsType::UnsignedInt:
+            return 0xFFFFFFFF;
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+bool IsTriangleMode(PrimitiveMode drawMode)
+{
+    switch (drawMode)
+    {
+        case PrimitiveMode::Triangles:
+        case PrimitiveMode::TriangleFan:
+        case PrimitiveMode::TriangleStrip:
+            return true;
+        case PrimitiveMode::Points:
+        case PrimitiveMode::Lines:
+        case PrimitiveMode::LineLoop:
+        case PrimitiveMode::LineStrip:
+            return false;
+        default:
+            UNREACHABLE();
+    }
+
+    return false;
+}
+
+bool IsPolygonMode(PrimitiveMode mode)
+{
+    switch (mode)
+    {
+        case PrimitiveMode::Points:
+        case PrimitiveMode::Lines:
+        case PrimitiveMode::LineStrip:
+        case PrimitiveMode::LineLoop:
+        case PrimitiveMode::LinesAdjacency:
+        case PrimitiveMode::LineStripAdjacency:
+            return false;
+        default:
+            break;
+    }
+
+    return true;
+}
+
+namespace priv
+{
+const angle::PackedEnumMap<PrimitiveMode, bool> gLineModes = {
+    {{PrimitiveMode::LineLoop, true},
+     {PrimitiveMode::LineStrip, true},
+     {PrimitiveMode::LineStripAdjacency, true},
+     {PrimitiveMode::Lines, true}}};
+}  // namespace priv
+
+bool IsIntegerFormat(GLenum unsizedFormat)
+{
+    switch (unsizedFormat)
+    {
+        case GL_RGBA_INTEGER:
+        case GL_RGB_INTEGER:
+        case GL_RG_INTEGER:
+        case GL_RED_INTEGER:
+            return true;
+
+        default:
+            return false;
+    }
+}
+
+// [OpenGL ES SL 3.00.4] Section 11 p. 120
+// Vertex Outs/Fragment Ins packing priorities
+int VariableSortOrder(GLenum type)
+{
+    switch (type)
+    {
+        // 1. Arrays of mat4 and mat4
+        // Non-square matrices of type matCxR consume the same space as a square
+        // matrix of type matN where N is the greater of C and R
+        case GL_FLOAT_MAT4:
+        case GL_FLOAT_MAT2x4:
+        case GL_FLOAT_MAT3x4:
+        case GL_FLOAT_MAT4x2:
+        case GL_FLOAT_MAT4x3:
+            return 0;
+
+        // 2. Arrays of mat2 and mat2 (since they occupy full rows)
+        case GL_FLOAT_MAT2:
+            return 1;
+
+        // 3. Arrays of vec4 and vec4
+        case GL_FLOAT_VEC4:
+        case GL_INT_VEC4:
+        case GL_BOOL_VEC4:
+        case GL_UNSIGNED_INT_VEC4:
+            return 2;
+
+        // 4. Arrays of mat3 and mat3
+        case GL_FLOAT_MAT3:
+        case GL_FLOAT_MAT2x3:
+        case GL_FLOAT_MAT3x2:
+            return 3;
+
+        // 5. Arrays of vec3 and vec3
+        case GL_FLOAT_VEC3:
+        case GL_INT_VEC3:
+        case GL_BOOL_VEC3:
+        case GL_UNSIGNED_INT_VEC3:
+            return 4;
+
+        // 6. Arrays of vec2 and vec2
+        case GL_FLOAT_VEC2:
+        case GL_INT_VEC2:
+        case GL_BOOL_VEC2:
+        case GL_UNSIGNED_INT_VEC2:
+            return 5;
+
+        // 7. Single component types
+        case GL_FLOAT:
+        case GL_INT:
+        case GL_BOOL:
+        case GL_UNSIGNED_INT:
+        case GL_SAMPLER_2D:
+        case GL_SAMPLER_CUBE:
+        case GL_SAMPLER_EXTERNAL_OES:
+        case GL_SAMPLER_2D_RECT_ANGLE:
+        case GL_SAMPLER_2D_ARRAY:
+        case GL_SAMPLER_2D_MULTISAMPLE:
+        case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_SAMPLER_3D:
+        case GL_INT_SAMPLER_2D:
+        case GL_INT_SAMPLER_3D:
+        case GL_INT_SAMPLER_CUBE:
+        case GL_INT_SAMPLER_2D_ARRAY:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D:
+        case GL_UNSIGNED_INT_SAMPLER_3D:
+        case GL_UNSIGNED_INT_SAMPLER_CUBE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:
+        case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+        case GL_SAMPLER_2D_SHADOW:
+        case GL_SAMPLER_2D_ARRAY_SHADOW:
+        case GL_SAMPLER_CUBE_SHADOW:
+        case GL_IMAGE_2D:
+        case GL_INT_IMAGE_2D:
+        case GL_UNSIGNED_INT_IMAGE_2D:
+        case GL_IMAGE_3D:
+        case GL_INT_IMAGE_3D:
+        case GL_UNSIGNED_INT_IMAGE_3D:
+        case GL_IMAGE_2D_ARRAY:
+        case GL_INT_IMAGE_2D_ARRAY:
+        case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+        case GL_IMAGE_CUBE:
+        case GL_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_IMAGE_CUBE:
+        case GL_UNSIGNED_INT_ATOMIC_COUNTER:
+        case GL_SAMPLER_VIDEO_IMAGE_WEBGL:
+        case GL_SAMPLER_EXTERNAL_2D_Y2Y_EXT:
+            return 6;
+
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+std::string ParseResourceName(const std::string &name, std::vector<unsigned int> *outSubscripts)
+{
+    if (outSubscripts)
+    {
+        outSubscripts->clear();
+    }
+    // Strip any trailing array indexing operators and retrieve the subscripts.
+    size_t baseNameLength = name.length();
+    bool hasIndex         = true;
+    while (hasIndex)
+    {
+        size_t open  = name.find_last_of('[', baseNameLength - 1);
+        size_t close = name.find_last_of(']', baseNameLength - 1);
+        hasIndex     = (open != std::string::npos) && (close == baseNameLength - 1);
+        if (hasIndex)
+        {
+            baseNameLength = open;
+            if (outSubscripts)
+            {
+                int index = atoi(name.substr(open + 1).c_str());
+                if (index >= 0)
+                {
+                    outSubscripts->push_back(index);
+                }
+                else
+                {
+                    outSubscripts->push_back(GL_INVALID_INDEX);
+                }
+            }
+        }
+    }
+
+    return name.substr(0, baseNameLength);
+}
+
+bool IsBuiltInName(const char *name)
+{
+    return angle::BeginsWith(name, "gl_");
+}
+
+std::string StripLastArrayIndex(const std::string &name)
+{
+    size_t strippedNameLength = name.find_last_of('[');
+    if (strippedNameLength != std::string::npos && name.back() == ']')
+    {
+        return name.substr(0, strippedNameLength);
+    }
+    return name;
+}
+
+bool SamplerNameContainsNonZeroArrayElement(const std::string &name)
+{
+    constexpr char kZERO_ELEMENT[] = "[0]";
+
+    size_t start = 0;
+    while (true)
+    {
+        start = name.find(kZERO_ELEMENT[0], start);
+        if (start == std::string::npos)
+        {
+            break;
+        }
+        if (name.compare(start, strlen(kZERO_ELEMENT), kZERO_ELEMENT) != 0)
+        {
+            return true;
+        }
+        start++;
+    }
+    return false;
+}
+
+unsigned int ArraySizeProduct(const std::vector<unsigned int> &arraySizes)
+{
+    unsigned int arraySizeProduct = 1u;
+    for (unsigned int arraySize : arraySizes)
+    {
+        arraySizeProduct *= arraySize;
+    }
+    return arraySizeProduct;
+}
+
+unsigned int InnerArraySizeProduct(const std::vector<unsigned int> &arraySizes)
+{
+    unsigned int arraySizeProduct = 1u;
+    for (size_t index = 0; index + 1 < arraySizes.size(); ++index)
+    {
+        arraySizeProduct *= arraySizes[index];
+    }
+    return arraySizeProduct;
+}
+
+unsigned int OutermostArraySize(const std::vector<unsigned int> &arraySizes)
+{
+    return arraySizes.empty() || arraySizes.back() == 0 ? 1 : arraySizes.back();
+}
+
+unsigned int ParseArrayIndex(const std::string &name, size_t *nameLengthWithoutArrayIndexOut)
+{
+    ASSERT(nameLengthWithoutArrayIndexOut != nullptr);
+
+    // Strip any trailing array operator and retrieve the subscript
+    size_t open = name.find_last_of('[');
+    if (open != std::string::npos && name.back() == ']')
+    {
+        bool indexIsValidDecimalNumber = true;
+        for (size_t i = open + 1; i < name.length() - 1u; ++i)
+        {
+            if (!isdigit(name[i]))
+            {
+                indexIsValidDecimalNumber = false;
+                break;
+            }
+
+            // Leading zeroes are invalid
+            if ((i == (open + 1)) && (name[i] == '0') && (name[i + 1] != ']'))
+            {
+                indexIsValidDecimalNumber = false;
+                break;
+            }
+        }
+        if (indexIsValidDecimalNumber)
+        {
+            errno = 0;  // reset global error flag.
+            unsigned long subscript =
+                strtoul(name.c_str() + open + 1, /*endptr*/ nullptr, /*radix*/ 10);
+
+            // Check if resulting integer is out-of-range or conversion error.
+            if (angle::base::IsValueInRangeForNumericType<uint32_t>(subscript) &&
+                !(subscript == ULONG_MAX && errno == ERANGE) && !(errno != 0 && subscript == 0))
+            {
+                *nameLengthWithoutArrayIndexOut = open;
+                return static_cast<unsigned int>(subscript);
+            }
+        }
+    }
+
+    *nameLengthWithoutArrayIndexOut = name.length();
+    return GL_INVALID_INDEX;
+}
+
+const char *GetGenericErrorMessage(GLenum error)
+{
+    switch (error)
+    {
+        case GL_NO_ERROR:
+            return "";
+        case GL_INVALID_ENUM:
+            return "Invalid enum.";
+        case GL_INVALID_VALUE:
+            return "Invalid value.";
+        case GL_INVALID_OPERATION:
+            return "Invalid operation.";
+        case GL_STACK_OVERFLOW:
+            return "Stack overflow.";
+        case GL_STACK_UNDERFLOW:
+            return "Stack underflow.";
+        case GL_OUT_OF_MEMORY:
+            return "Out of memory.";
+        case GL_INVALID_FRAMEBUFFER_OPERATION:
+            return "Invalid framebuffer operation.";
+        default:
+            UNREACHABLE();
+            return "Unknown error.";
+    }
+}
+
+unsigned int ElementTypeSize(GLenum elementType)
+{
+    switch (elementType)
+    {
+        case GL_UNSIGNED_BYTE:
+            return sizeof(GLubyte);
+        case GL_UNSIGNED_SHORT:
+            return sizeof(GLushort);
+        case GL_UNSIGNED_INT:
+            return sizeof(GLuint);
+        default:
+            UNREACHABLE();
+            return 0;
+    }
+}
+
+bool IsMipmapFiltered(GLenum minFilterMode)
+{
+    switch (minFilterMode)
+    {
+        case GL_NEAREST:
+        case GL_LINEAR:
+            return false;
+        case GL_NEAREST_MIPMAP_NEAREST:
+        case GL_LINEAR_MIPMAP_NEAREST:
+        case GL_NEAREST_MIPMAP_LINEAR:
+        case GL_LINEAR_MIPMAP_LINEAR:
+            return true;
+        default:
+            UNREACHABLE();
+            return false;
+    }
+}
+
+PipelineType GetPipelineType(ShaderType type)
+{
+    switch (type)
+    {
+        case ShaderType::Vertex:
+        case ShaderType::Fragment:
+        case ShaderType::Geometry:
+            return PipelineType::GraphicsPipeline;
+        case ShaderType::Compute:
+            return PipelineType::ComputePipeline;
+        default:
+            UNREACHABLE();
+            return PipelineType::GraphicsPipeline;
+    }
+}
+
+const char *GetDebugMessageSourceString(GLenum source)
+{
+    switch (source)
+    {
+        case GL_DEBUG_SOURCE_API:
+            return "API";
+        case GL_DEBUG_SOURCE_WINDOW_SYSTEM:
+            return "Window System";
+        case GL_DEBUG_SOURCE_SHADER_COMPILER:
+            return "Shader Compiler";
+        case GL_DEBUG_SOURCE_THIRD_PARTY:
+            return "Third Party";
+        case GL_DEBUG_SOURCE_APPLICATION:
+            return "Application";
+        case GL_DEBUG_SOURCE_OTHER:
+            return "Other";
+        default:
+            return "Unknown Source";
+    }
+}
+
+const char *GetDebugMessageTypeString(GLenum type)
+{
+    switch (type)
+    {
+        case GL_DEBUG_TYPE_ERROR:
+            return "Error";
+        case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR:
+            return "Deprecated behavior";
+        case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
+            return "Undefined behavior";
+        case GL_DEBUG_TYPE_PORTABILITY:
+            return "Portability";
+        case GL_DEBUG_TYPE_PERFORMANCE:
+            return "Performance";
+        case GL_DEBUG_TYPE_OTHER:
+            return "Other";
+        case GL_DEBUG_TYPE_MARKER:
+            return "Marker";
+        default:
+            return "Unknown Type";
+    }
+}
+
+const char *GetDebugMessageSeverityString(GLenum severity)
+{
+    switch (severity)
+    {
+        case GL_DEBUG_SEVERITY_HIGH:
+            return "High";
+        case GL_DEBUG_SEVERITY_MEDIUM:
+            return "Medium";
+        case GL_DEBUG_SEVERITY_LOW:
+            return "Low";
+        case GL_DEBUG_SEVERITY_NOTIFICATION:
+            return "Notification";
+        default:
+            return "Unknown Severity";
+    }
+}
+
+ShaderType GetShaderTypeFromBitfield(size_t singleShaderType)
+{
+    switch (singleShaderType)
+    {
+        case GL_VERTEX_SHADER_BIT:
+            return ShaderType::Vertex;
+        case GL_FRAGMENT_SHADER_BIT:
+            return ShaderType::Fragment;
+        case GL_COMPUTE_SHADER_BIT:
+            return ShaderType::Compute;
+        case GL_GEOMETRY_SHADER_BIT:
+            return ShaderType::Geometry;
+        case GL_TESS_CONTROL_SHADER_BIT:
+            return ShaderType::TessControl;
+        case GL_TESS_EVALUATION_SHADER_BIT:
+            return ShaderType::TessEvaluation;
+        default:
+            return ShaderType::InvalidEnum;
+    }
+}
+
+GLbitfield GetBitfieldFromShaderType(ShaderType shaderType)
+{
+    switch (shaderType)
+    {
+        case ShaderType::Vertex:
+            return GL_VERTEX_SHADER_BIT;
+        case ShaderType::Fragment:
+            return GL_FRAGMENT_SHADER_BIT;
+        case ShaderType::Compute:
+            return GL_COMPUTE_SHADER_BIT;
+        case ShaderType::Geometry:
+            return GL_GEOMETRY_SHADER_BIT;
+        case ShaderType::TessControl:
+            return GL_TESS_CONTROL_SHADER_BIT;
+        case ShaderType::TessEvaluation:
+            return GL_TESS_EVALUATION_SHADER_BIT;
+        default:
+            UNREACHABLE();
+            return GL_ZERO;
+    }
+}
+
+bool ShaderTypeSupportsTransformFeedback(ShaderType shaderType)
+{
+    switch (shaderType)
+    {
+        case ShaderType::Vertex:
+        case ShaderType::Geometry:
+        case ShaderType::TessEvaluation:
+            return true;
+        default:
+            return false;
+    }
+}
+
+ShaderType GetLastPreFragmentStage(ShaderBitSet shaderTypes)
+{
+    shaderTypes.reset(ShaderType::Fragment);
+    shaderTypes.reset(ShaderType::Compute);
+    return shaderTypes.any() ? shaderTypes.last() : ShaderType::InvalidEnum;
+}
+}  // namespace gl
+
+namespace egl
+{
+static_assert(EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X_KHR - EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR == 1,
+              "Unexpected EGL cube map enum value.");
+static_assert(EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y_KHR - EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR == 2,
+              "Unexpected EGL cube map enum value.");
+static_assert(EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_KHR - EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR == 3,
+              "Unexpected EGL cube map enum value.");
+static_assert(EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z_KHR - EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR == 4,
+              "Unexpected EGL cube map enum value.");
+static_assert(EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR - EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR == 5,
+              "Unexpected EGL cube map enum value.");
+
+bool IsCubeMapTextureTarget(EGLenum target)
+{
+    return (target >= FirstCubeMapTextureTarget && target <= LastCubeMapTextureTarget);
+}
+
+size_t CubeMapTextureTargetToLayerIndex(EGLenum target)
+{
+    ASSERT(IsCubeMapTextureTarget(target));
+    return target - static_cast<size_t>(FirstCubeMapTextureTarget);
+}
+
+EGLenum LayerIndexToCubeMapTextureTarget(size_t index)
+{
+    ASSERT(index <= (LastCubeMapTextureTarget - FirstCubeMapTextureTarget));
+    return FirstCubeMapTextureTarget + static_cast<GLenum>(index);
+}
+
+bool IsTextureTarget(EGLenum target)
+{
+    switch (target)
+    {
+        case EGL_GL_TEXTURE_2D_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z_KHR:
+        case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR:
+        case EGL_GL_TEXTURE_3D_KHR:
+            return true;
+
+        default:
+            return false;
+    }
+}
+
+bool IsRenderbufferTarget(EGLenum target)
+{
+    return target == EGL_GL_RENDERBUFFER_KHR;
+}
+
+bool IsExternalImageTarget(EGLenum target)
+{
+    switch (target)
+    {
+        case EGL_NATIVE_BUFFER_ANDROID:
+        case EGL_D3D11_TEXTURE_ANGLE:
+        case EGL_LINUX_DMA_BUF_EXT:
+        case EGL_METAL_TEXTURE_ANGLE:
+        case EGL_VULKAN_IMAGE_ANGLE:
+            return true;
+
+        default:
+            return false;
+    }
+}
+
+const char *GetGenericErrorMessage(EGLint error)
+{
+    switch (error)
+    {
+        case EGL_SUCCESS:
+            return "";
+        case EGL_NOT_INITIALIZED:
+            return "Not initialized.";
+        case EGL_BAD_ACCESS:
+            return "Bad access.";
+        case EGL_BAD_ALLOC:
+            return "Bad allocation.";
+        case EGL_BAD_ATTRIBUTE:
+            return "Bad attribute.";
+        case EGL_BAD_CONFIG:
+            return "Bad config.";
+        case EGL_BAD_CONTEXT:
+            return "Bad context.";
+        case EGL_BAD_CURRENT_SURFACE:
+            return "Bad current surface.";
+        case EGL_BAD_DISPLAY:
+            return "Bad display.";
+        case EGL_BAD_MATCH:
+            return "Bad match.";
+        case EGL_BAD_NATIVE_WINDOW:
+            return "Bad native window.";
+        case EGL_BAD_NATIVE_PIXMAP:
+            return "Bad native pixmap.";
+        case EGL_BAD_PARAMETER:
+            return "Bad parameter.";
+        case EGL_BAD_SURFACE:
+            return "Bad surface.";
+        case EGL_CONTEXT_LOST:
+            return "Context lost.";
+        case EGL_BAD_STREAM_KHR:
+            return "Bad stream.";
+        case EGL_BAD_STATE_KHR:
+            return "Bad state.";
+        case EGL_BAD_DEVICE_EXT:
+            return "Bad device.";
+        default:
+            UNREACHABLE();
+            return "Unknown error.";
+    }
+}
+
+}  // namespace egl
+
+namespace egl_gl
+{
+GLuint EGLClientBufferToGLObjectHandle(EGLClientBuffer buffer)
+{
+    return static_cast<GLuint>(reinterpret_cast<uintptr_t>(buffer));
+}
+}  // namespace egl_gl
+
+namespace gl_egl
+{
+EGLenum GLComponentTypeToEGLColorComponentType(GLenum glComponentType)
+{
+    switch (glComponentType)
+    {
+        case GL_FLOAT:
+            return EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT;
+
+        case GL_UNSIGNED_NORMALIZED:
+            return EGL_COLOR_COMPONENT_TYPE_FIXED_EXT;
+
+        default:
+            UNREACHABLE();
+            return EGL_NONE;
+    }
+}
+
+EGLClientBuffer GLObjectHandleToEGLClientBuffer(GLuint handle)
+{
+    return reinterpret_cast<EGLClientBuffer>(static_cast<uintptr_t>(handle));
+}
+
+}  // namespace gl_egl
+
+namespace angle
+{
+bool IsDrawEntryPoint(EntryPoint entryPoint)
+{
+    switch (entryPoint)
+    {
+        case EntryPoint::GLDrawArrays:
+        case EntryPoint::GLDrawArraysIndirect:
+        case EntryPoint::GLDrawArraysInstanced:
+        case EntryPoint::GLDrawArraysInstancedANGLE:
+        case EntryPoint::GLDrawArraysInstancedBaseInstance:
+        case EntryPoint::GLDrawArraysInstancedBaseInstanceANGLE:
+        case EntryPoint::GLDrawArraysInstancedEXT:
+        case EntryPoint::GLDrawElements:
+        case EntryPoint::GLDrawElementsBaseVertex:
+        case EntryPoint::GLDrawElementsBaseVertexEXT:
+        case EntryPoint::GLDrawElementsBaseVertexOES:
+        case EntryPoint::GLDrawElementsIndirect:
+        case EntryPoint::GLDrawElementsInstanced:
+        case EntryPoint::GLDrawElementsInstancedANGLE:
+        case EntryPoint::GLDrawElementsInstancedBaseInstance:
+        case EntryPoint::GLDrawElementsInstancedBaseVertex:
+        case EntryPoint::GLDrawElementsInstancedBaseVertexBaseInstance:
+        case EntryPoint::GLDrawElementsInstancedBaseVertexBaseInstanceANGLE:
+        case EntryPoint::GLDrawElementsInstancedBaseVertexEXT:
+        case EntryPoint::GLDrawElementsInstancedBaseVertexOES:
+        case EntryPoint::GLDrawElementsInstancedEXT:
+        case EntryPoint::GLDrawPixels:
+        case EntryPoint::GLDrawRangeElements:
+        case EntryPoint::GLDrawRangeElementsBaseVertex:
+        case EntryPoint::GLDrawRangeElementsBaseVertexEXT:
+        case EntryPoint::GLDrawRangeElementsBaseVertexOES:
+        case EntryPoint::GLDrawTexfOES:
+        case EntryPoint::GLDrawTexfvOES:
+        case EntryPoint::GLDrawTexiOES:
+        case EntryPoint::GLDrawTexivOES:
+        case EntryPoint::GLDrawTexsOES:
+        case EntryPoint::GLDrawTexsvOES:
+        case EntryPoint::GLDrawTexxOES:
+        case EntryPoint::GLDrawTexxvOES:
+        case EntryPoint::GLDrawTransformFeedback:
+        case EntryPoint::GLDrawTransformFeedbackInstanced:
+        case EntryPoint::GLDrawTransformFeedbackStream:
+        case EntryPoint::GLDrawTransformFeedbackStreamInstanced:
+            return true;
+        default:
+            return false;
+    }
+}
+
+bool IsDispatchEntryPoint(EntryPoint entryPoint)
+{
+    switch (entryPoint)
+    {
+        case EntryPoint::GLDispatchCompute:
+        case EntryPoint::GLDispatchComputeIndirect:
+            return true;
+        default:
+            return false;
+    }
+}
+
+bool IsClearEntryPoint(EntryPoint entryPoint)
+{
+    switch (entryPoint)
+    {
+        case EntryPoint::GLClear:
+        case EntryPoint::GLClearBufferfi:
+        case EntryPoint::GLClearBufferfv:
+        case EntryPoint::GLClearBufferiv:
+        case EntryPoint::GLClearBufferuiv:
+            return true;
+        default:
+            return false;
+    }
+}
+
+bool IsQueryEntryPoint(EntryPoint entryPoint)
+{
+    switch (entryPoint)
+    {
+        case EntryPoint::GLBeginQuery:
+        case EntryPoint::GLBeginQueryEXT:
+        case EntryPoint::GLBeginQueryIndexed:
+        case EntryPoint::GLEndQuery:
+        case EntryPoint::GLEndQueryEXT:
+        case EntryPoint::GLEndQueryIndexed:
+            return true;
+        default:
+            return false;
+    }
+}
+}  // namespace angle
+
+#if !defined(ANGLE_ENABLE_WINDOWS_UWP)
+void writeFile(const char *path, const void *content, size_t size)
+{
+    FILE *file = fopen(path, "w");
+    if (!file)
+    {
+        UNREACHABLE();
+        return;
+    }
+
+    fwrite(content, sizeof(char), size, file);
+    fclose(file);
+}
+#endif  // !ANGLE_ENABLE_WINDOWS_UWP
+
+#if defined(ANGLE_PLATFORM_WINDOWS)
+
+// Causes the thread to relinquish the remainder of its time slice to any
+// other thread that is ready to run.If there are no other threads ready
+// to run, the function returns immediately, and the thread continues execution.
+void ScheduleYield()
+{
+    Sleep(0);
+}
+
+#endif
diff --git a/gfx/angle/checkout/src/common/utilities.h b/gfx/angle/checkout/src/common/utilities.h
new file mode 100644
index 0000000000..cae620d03b
--- /dev/null
+++ b/gfx/angle/checkout/src/common/utilities.h
@@ -0,0 +1,336 @@
+//
+// Copyright 2002 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// utilities.h: Conversion functions and other utility routines.
+
+#ifndef COMMON_UTILITIES_H_
+#define COMMON_UTILITIES_H_
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLSLANG/ShaderLang.h>
+
+#include <math.h>
+#include <string>
+#include <vector>
+
+#include "angle_gl.h"
+
+#include "common/PackedEnums.h"
+#include "common/mathutil.h"
+#include "common/platform.h"
+
+namespace sh
+{
+struct ShaderVariable;
+}
+
+constexpr bool ShPixelLocalStorageTypeUsesImages(ShPixelLocalStorageType type)
+{
+    return type == ShPixelLocalStorageType::ImageStoreR32PackedFormats ||
+           type == ShPixelLocalStorageType::ImageStoreNativeFormats;
+}
+
+namespace gl
+{
+
+int VariableComponentCount(GLenum type);
+GLenum VariableComponentType(GLenum type);
+size_t VariableComponentSize(GLenum type);
+size_t VariableInternalSize(GLenum type);
+size_t VariableExternalSize(GLenum type);
+int VariableRowCount(GLenum type);
+int VariableColumnCount(GLenum type);
+bool IsSamplerType(GLenum type);
+bool IsSamplerCubeType(GLenum type);
+bool IsSamplerYUVType(GLenum type);
+bool IsImageType(GLenum type);
+bool IsImage2DType(GLenum type);
+bool IsAtomicCounterType(GLenum type);
+bool IsOpaqueType(GLenum type);
+bool IsMatrixType(GLenum type);
+GLenum TransposeMatrixType(GLenum type);
+int VariableRegisterCount(GLenum type);
+int MatrixRegisterCount(GLenum type, bool isRowMajorMatrix);
+int MatrixComponentCount(GLenum type, bool isRowMajorMatrix);
+int VariableSortOrder(GLenum type);
+GLenum VariableBoolVectorType(GLenum type);
+std::string GetGLSLTypeString(GLenum type);
+
+int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize);
+
+// Parse the base resource name and array indices. Returns the base name of the resource.
+// If the provided name doesn't index an array, the outSubscripts vector will be empty.
+// If the provided name indexes an array, the outSubscripts vector will contain indices with
+// outermost array indices in the back. If an array index is invalid, GL_INVALID_INDEX is added to
+// outSubscripts.
+std::string ParseResourceName(const std::string &name, std::vector<unsigned int> *outSubscripts);
+
+bool IsBuiltInName(const char *name);
+ANGLE_INLINE bool IsBuiltInName(const std::string &name)
+{
+    return IsBuiltInName(name.c_str());
+}
+
+// Strips only the last array index from a resource name.
+std::string StripLastArrayIndex(const std::string &name);
+
+bool SamplerNameContainsNonZeroArrayElement(const std::string &name);
+
+// Find the range of index values in the provided indices pointer.  Primitive restart indices are
+// only counted in the range if primitive restart is disabled.
+IndexRange ComputeIndexRange(DrawElementsType indexType,
+                             const GLvoid *indices,
+                             size_t count,
+                             bool primitiveRestartEnabled);
+
+// Get the primitive restart index value for the given index type.
+GLuint GetPrimitiveRestartIndex(DrawElementsType indexType);
+
+// Get the primitive restart index value with the given C++ type.
+template <typename T>
+constexpr T GetPrimitiveRestartIndexFromType()
+{
+    return std::numeric_limits<T>::max();
+}
+
+static_assert(GetPrimitiveRestartIndexFromType<uint8_t>() == 0xFF,
+              "verify restart index for uint8_t values");
+static_assert(GetPrimitiveRestartIndexFromType<uint16_t>() == 0xFFFF,
+              "verify restart index for uint8_t values");
+static_assert(GetPrimitiveRestartIndexFromType<uint32_t>() == 0xFFFFFFFF,
+              "verify restart index for uint8_t values");
+
+bool IsTriangleMode(PrimitiveMode drawMode);
+bool IsPolygonMode(PrimitiveMode mode);
+
+namespace priv
+{
+extern const angle::PackedEnumMap<PrimitiveMode, bool> gLineModes;
+}  // namespace priv
+
+ANGLE_INLINE bool IsLineMode(PrimitiveMode primitiveMode)
+{
+    return priv::gLineModes[primitiveMode];
+}
+
+bool IsIntegerFormat(GLenum unsizedFormat);
+
+// Returns the product of the sizes in the vector, or 1 if the vector is empty. Doesn't currently
+// perform overflow checks.
+unsigned int ArraySizeProduct(const std::vector<unsigned int> &arraySizes);
+// Returns the product of the sizes in the vector except for the outermost dimension, or 1 if the
+// vector is empty.
+unsigned int InnerArraySizeProduct(const std::vector<unsigned int> &arraySizes);
+// Returns the outermost array dimension, or 1 if the vector is empty.
+unsigned int OutermostArraySize(const std::vector<unsigned int> &arraySizes);
+
+// Return the array index at the end of name, and write the length of name before the final array
+// index into nameLengthWithoutArrayIndexOut. In case name doesn't include an array index, return
+// GL_INVALID_INDEX and write the length of the original string.
+unsigned int ParseArrayIndex(const std::string &name, size_t *nameLengthWithoutArrayIndexOut);
+
+enum class SamplerFormat : uint8_t
+{
+    Float    = 0,
+    Unsigned = 1,
+    Signed   = 2,
+    Shadow   = 3,
+
+    InvalidEnum = 4,
+    EnumCount   = 4,
+};
+
+struct UniformTypeInfo final : angle::NonCopyable
+{
+    inline constexpr UniformTypeInfo(GLenum type,
+                                     GLenum componentType,
+                                     GLenum textureType,
+                                     GLenum transposedMatrixType,
+                                     GLenum boolVectorType,
+                                     SamplerFormat samplerFormat,
+                                     int rowCount,
+                                     int columnCount,
+                                     int componentCount,
+                                     size_t componentSize,
+                                     size_t internalSize,
+                                     size_t externalSize,
+                                     bool isSampler,
+                                     bool isMatrixType,
+                                     bool isImageType);
+
+    GLenum type;
+    GLenum componentType;
+    GLenum textureType;
+    GLenum transposedMatrixType;
+    GLenum boolVectorType;
+    SamplerFormat samplerFormat;
+    int rowCount;
+    int columnCount;
+    int componentCount;
+    size_t componentSize;
+    size_t internalSize;
+    size_t externalSize;
+    bool isSampler;
+    bool isMatrixType;
+    bool isImageType;
+};
+
+inline constexpr UniformTypeInfo::UniformTypeInfo(GLenum type,
+                                                  GLenum componentType,
+                                                  GLenum textureType,
+                                                  GLenum transposedMatrixType,
+                                                  GLenum boolVectorType,
+                                                  SamplerFormat samplerFormat,
+                                                  int rowCount,
+                                                  int columnCount,
+                                                  int componentCount,
+                                                  size_t componentSize,
+                                                  size_t internalSize,
+                                                  size_t externalSize,
+                                                  bool isSampler,
+                                                  bool isMatrixType,
+                                                  bool isImageType)
+    : type(type),
+      componentType(componentType),
+      textureType(textureType),
+      transposedMatrixType(transposedMatrixType),
+      boolVectorType(boolVectorType),
+      samplerFormat(samplerFormat),
+      rowCount(rowCount),
+      columnCount(columnCount),
+      componentCount(componentCount),
+      componentSize(componentSize),
+      internalSize(internalSize),
+      externalSize(externalSize),
+      isSampler(isSampler),
+      isMatrixType(isMatrixType),
+      isImageType(isImageType)
+{}
+
+const UniformTypeInfo &GetUniformTypeInfo(GLenum uniformType);
+
+const char *GetGenericErrorMessage(GLenum error);
+
+unsigned int ElementTypeSize(GLenum elementType);
+
+bool IsMipmapFiltered(GLenum minFilterMode);
+
+template <typename T>
+T GetClampedVertexCount(size_t vertexCount)
+{
+    static constexpr size_t kMax = static_cast<size_t>(std::numeric_limits<T>::max());
+    return static_cast<T>(vertexCount > kMax ? kMax : vertexCount);
+}
+
+enum class PipelineType
+{
+    GraphicsPipeline = 0,
+    ComputePipeline  = 1,
+};
+
+PipelineType GetPipelineType(ShaderType shaderType);
+
+// For use with KHR_debug.
+const char *GetDebugMessageSourceString(GLenum source);
+const char *GetDebugMessageTypeString(GLenum type);
+const char *GetDebugMessageSeverityString(GLenum severity);
+
+// For use with EXT_texture_format_sRGB_override and EXT_texture_sRGB_decode
+// A texture may be forced to decode to a nonlinear colorspace, to a linear colorspace, or to the
+// default colorspace of its current format.
+//
+// Default corresponds to "the texture should use the imageview that corresponds to its format"
+// Linear corresponds to "the texture has sRGB decoding disabled by extension, and should use a
+// linear imageview even if it is in a nonlinear format" NonLinear corresponds to "the texture has
+// sRGB override enabled by extension, and should use a nonlinear imageview even if it is in a
+// linear format"
+enum class SrgbOverride
+{
+    Default = 0,
+    SRGB,
+    Linear
+};
+
+// For use with EXT_sRGB_write_control
+// A render target may be forced to convert to a linear colorspace, or may be allowed to do whatever
+// colorspace conversion is appropriate for its format. There is no option to force linear->sRGB, it
+// can only convert from sRGB->linear
+enum class SrgbWriteControlMode
+{
+    Default = 0,
+    Linear  = 1
+};
+
+// For use with EXT_YUV_target
+// A sampler of external YUV textures may either implicitly perform RGB conversion (regular
+// samplerExternalOES) or skip the conversion and sample raw YUV values (__samplerExternal2DY2Y).
+enum class YuvSamplingMode
+{
+    Default = 0,
+    Y2Y     = 1
+};
+
+ShaderType GetShaderTypeFromBitfield(size_t singleShaderType);
+GLbitfield GetBitfieldFromShaderType(ShaderType shaderType);
+bool ShaderTypeSupportsTransformFeedback(ShaderType shaderType);
+// Given a set of shader stages, returns the last vertex processing stage.  This is the stage that
+// interfaces the fragment shader.
+ShaderType GetLastPreFragmentStage(ShaderBitSet shaderTypes);
+
+}  // namespace gl
+
+namespace egl
+{
+static const EGLenum FirstCubeMapTextureTarget = EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR;
+static const EGLenum LastCubeMapTextureTarget  = EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR;
+bool IsCubeMapTextureTarget(EGLenum target);
+size_t CubeMapTextureTargetToLayerIndex(EGLenum target);
+EGLenum LayerIndexToCubeMapTextureTarget(size_t index);
+bool IsTextureTarget(EGLenum target);
+bool IsRenderbufferTarget(EGLenum target);
+bool IsExternalImageTarget(EGLenum target);
+
+const char *GetGenericErrorMessage(EGLint error);
+}  // namespace egl
+
+namespace egl_gl
+{
+GLuint EGLClientBufferToGLObjectHandle(EGLClientBuffer buffer);
+}
+
+namespace gl_egl
+{
+EGLenum GLComponentTypeToEGLColorComponentType(GLenum glComponentType);
+EGLClientBuffer GLObjectHandleToEGLClientBuffer(GLuint handle);
+}  // namespace gl_egl
+
+namespace angle
+{
+bool IsDrawEntryPoint(EntryPoint entryPoint);
+bool IsDispatchEntryPoint(EntryPoint entryPoint);
+bool IsClearEntryPoint(EntryPoint entryPoint);
+bool IsQueryEntryPoint(EntryPoint entryPoint);
+}  // namespace angle
+
+#if !defined(ANGLE_ENABLE_WINDOWS_UWP)
+void writeFile(const char *path, const void *data, size_t size);
+#endif
+
+#if defined(ANGLE_PLATFORM_WINDOWS)
+void ScheduleYield();
+#endif
+
+// Get the underlying type. Useful for indexing into arrays with enum values by avoiding the clutter
+// of the extraneous static_cast<>() calls.
+// https://stackoverflow.com/a/8357462
+template <typename E>
+constexpr typename std::underlying_type<E>::type ToUnderlying(E e) noexcept
+{
+    return static_cast<typename std::underlying_type<E>::type>(e);
+}
+
+#endif  // COMMON_UTILITIES_H_
diff --git a/gfx/angle/checkout/src/common/vector_utils.h b/gfx/angle/checkout/src/common/vector_utils.h
new file mode 100644
index 0000000000..88c7492e72
--- /dev/null
+++ b/gfx/angle/checkout/src/common/vector_utils.h
@@ -0,0 +1,523 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// vector_utils.h: Utility classes implementing various vector operations
+
+#ifndef COMMON_VECTOR_UTILS_H_
+#define COMMON_VECTOR_UTILS_H_
+
+#include <cmath>
+#include <cstddef>
+#include <ostream>
+#include <type_traits>
+
+namespace angle
+{
+
+template <size_t Dimension, typename Type>
+class Vector;
+
+using Vector2 = Vector<2, float>;
+using Vector3 = Vector<3, float>;
+using Vector4 = Vector<4, float>;
+
+using Vector2I = Vector<2, int>;
+using Vector3I = Vector<3, int>;
+using Vector4I = Vector<4, int>;
+
+using Vector2U = Vector<2, unsigned int>;
+using Vector3U = Vector<3, unsigned int>;
+using Vector4U = Vector<4, unsigned int>;
+
+template <size_t Dimension, typename Type>
+class VectorBase
+{
+  public:
+    using VectorN = Vector<Dimension, Type>;
+
+    // Constructors
+    VectorBase() = default;
+    explicit VectorBase(Type element);
+
+    template <typename Type2>
+    VectorBase(const VectorBase<Dimension, Type2> &other);
+
+    template <typename Arg1, typename Arg2, typename... Args>
+    VectorBase(const Arg1 &arg1, const Arg2 &arg2, const Args &...args);
+
+    // Access the vector backing storage directly
+    const Type *data() const { return mData; }
+    Type *data() { return mData; }
+    constexpr size_t size() const { return Dimension; }
+
+    // Load or store the pointer from / to raw data
+    static VectorN Load(const Type *source);
+    static void Store(const VectorN &source, Type *destination);
+
+    // Index the vector
+    Type &operator[](size_t i) { return mData[i]; }
+    const Type &operator[](size_t i) const { return mData[i]; }
+
+    // Basic arithmetic operations
+    VectorN operator+() const;
+    VectorN operator-() const;
+    VectorN operator+(const VectorN &other) const;
+    VectorN operator-(const VectorN &other) const;
+    VectorN operator*(const VectorN &other) const;
+    VectorN operator/(const VectorN &other) const;
+    VectorN operator*(Type other) const;
+    VectorN operator/(Type other) const;
+    friend VectorN operator*(Type a, const VectorN &b) { return b * a; }
+
+    // Compound arithmetic operations
+    VectorN &operator+=(const VectorN &other);
+    VectorN &operator-=(const VectorN &other);
+    VectorN &operator*=(const VectorN &other);
+    VectorN &operator/=(const VectorN &other);
+    VectorN &operator*=(Type other);
+    VectorN &operator/=(Type other);
+
+    // Comparison operators
+    bool operator==(const VectorBase<Dimension, Type> &other) const;
+    bool operator!=(const VectorBase<Dimension, Type> &other) const;
+
+    // Other arithmetic operations
+    Type length() const;
+    Type lengthSquared() const;
+    Type dot(const VectorBase<Dimension, Type> &other) const;
+    VectorN normalized() const;
+
+  protected:
+    template <size_t CurrentIndex, size_t OtherDimension, typename OtherType, typename... Args>
+    void initWithList(const Vector<OtherDimension, OtherType> &arg1, const Args &...args);
+
+    // Some old compilers consider this function an alternative for initWithList(Vector)
+    // when the variant above is more precise. Use SFINAE on the return value to hide
+    // this variant for non-arithmetic types. The return value is still void.
+    template <size_t CurrentIndex, typename OtherType, typename... Args>
+    typename std::enable_if<std::is_arithmetic<OtherType>::value>::type initWithList(
+        OtherType arg1,
+        const Args &...args);
+
+    template <size_t CurrentIndex>
+    void initWithList() const;
+
+    template <size_t Dimension2, typename Type2>
+    friend class VectorBase;
+
+    Type mData[Dimension];
+};
+
+template <size_t Dimension, typename Type>
+std::ostream &operator<<(std::ostream &ostream, const VectorBase<Dimension, Type> &vector);
+
+template <typename Type>
+class Vector<2, Type> : public VectorBase<2, Type>
+{
+  public:
+    // Import the constructors defined in VectorBase
+    using VectorBase<2, Type>::VectorBase;
+
+    // Element shorthands
+    Type &x() { return this->mData[0]; }
+    Type &y() { return this->mData[1]; }
+
+    const Type &x() const { return this->mData[0]; }
+    const Type &y() const { return this->mData[1]; }
+};
+
+template <typename Type>
+std::ostream &operator<<(std::ostream &ostream, const Vector<2, Type> &vector);
+
+template <typename Type>
+class Vector<3, Type> : public VectorBase<3, Type>
+{
+  public:
+    // Import the constructors defined in VectorBase
+    using VectorBase<3, Type>::VectorBase;
+
+    // Additional operations
+    Vector<3, Type> cross(const Vector<3, Type> &other) const;
+
+    // Element shorthands
+    Type &x() { return this->mData[0]; }
+    Type &y() { return this->mData[1]; }
+    Type &z() { return this->mData[2]; }
+
+    const Type &x() const { return this->mData[0]; }
+    const Type &y() const { return this->mData[1]; }
+    const Type &z() const { return this->mData[2]; }
+};
+
+template <typename Type>
+std::ostream &operator<<(std::ostream &ostream, const Vector<3, Type> &vector);
+
+template <typename Type>
+class Vector<4, Type> : public VectorBase<4, Type>
+{
+  public:
+    // Import the constructors defined in VectorBase
+    using VectorBase<4, Type>::VectorBase;
+
+    // Element shorthands
+    Type &x() { return this->mData[0]; }
+    Type &y() { return this->mData[1]; }
+    Type &z() { return this->mData[2]; }
+    Type &w() { return this->mData[3]; }
+
+    const Type &x() const { return this->mData[0]; }
+    const Type &y() const { return this->mData[1]; }
+    const Type &z() const { return this->mData[2]; }
+    const Type &w() const { return this->mData[3]; }
+};
+
+template <typename Type>
+std::ostream &operator<<(std::ostream &ostream, const Vector<4, Type> &vector);
+
+// Implementation of constructors and misc operations
+
+template <size_t Dimension, typename Type>
+VectorBase<Dimension, Type>::VectorBase(Type element)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        mData[i] = element;
+    }
+}
+
+template <size_t Dimension, typename Type>
+template <typename Type2>
+VectorBase<Dimension, Type>::VectorBase(const VectorBase<Dimension, Type2> &other)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        mData[i] = static_cast<Type>(other.mData[i]);
+    }
+}
+
+// Ideally we would like to have only two constructors:
+//  - a scalar constructor that takes Type as a parameter
+//  - a compound constructor
+// However if we define the compound constructor for when it has a single arguments, then calling
+// Vector2(0.0) will be ambiguous. To solve this we take advantage of there being a single compound
+// constructor with a single argument, which is the copy constructor. We end up with three
+// constructors:
+//  - the scalar constructor
+//  - the copy constructor
+//  - the compound constructor for two or more arguments, hence the arg1, and arg2 here.
+template <size_t Dimension, typename Type>
+template <typename Arg1, typename Arg2, typename... Args>
+VectorBase<Dimension, Type>::VectorBase(const Arg1 &arg1, const Arg2 &arg2, const Args &...args)
+{
+    initWithList<0>(arg1, arg2, args...);
+}
+
+template <size_t Dimension, typename Type>
+template <size_t CurrentIndex, size_t OtherDimension, typename OtherType, typename... Args>
+void VectorBase<Dimension, Type>::initWithList(const Vector<OtherDimension, OtherType> &arg1,
+                                               const Args &...args)
+{
+    static_assert(CurrentIndex + OtherDimension <= Dimension,
+                  "Too much data in the vector constructor.");
+    for (size_t i = 0; i < OtherDimension; ++i)
+    {
+        mData[CurrentIndex + i] = static_cast<Type>(arg1.mData[i]);
+    }
+    initWithList<CurrentIndex + OtherDimension>(args...);
+}
+
+template <size_t Dimension, typename Type>
+template <size_t CurrentIndex, typename OtherType, typename... Args>
+typename std::enable_if<std::is_arithmetic<OtherType>::value>::type
+VectorBase<Dimension, Type>::initWithList(OtherType arg1, const Args &...args)
+{
+    static_assert(CurrentIndex + 1 <= Dimension, "Too much data in the vector constructor.");
+    mData[CurrentIndex] = static_cast<Type>(arg1);
+    initWithList<CurrentIndex + 1>(args...);
+}
+
+template <size_t Dimension, typename Type>
+template <size_t CurrentIndex>
+void VectorBase<Dimension, Type>::initWithList() const
+{
+    static_assert(CurrentIndex == Dimension, "Not enough data in the vector constructor.");
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::Load(const Type *source)
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = source[i];
+    }
+    return result;
+}
+
+template <size_t Dimension, typename Type>
+void VectorBase<Dimension, Type>::Store(const Vector<Dimension, Type> &source, Type *destination)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        destination[i] = source.mData[i];
+    }
+}
+
+// Implementation of basic arithmetic operations
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::operator+() const
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = +mData[i];
+    }
+    return result;
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::operator-() const
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = -mData[i];
+    }
+    return result;
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::operator+(
+    const Vector<Dimension, Type> &other) const
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = mData[i] + other.mData[i];
+    }
+    return result;
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::operator-(
+    const Vector<Dimension, Type> &other) const
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = mData[i] - other.mData[i];
+    }
+    return result;
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::operator*(
+    const Vector<Dimension, Type> &other) const
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = mData[i] * other.mData[i];
+    }
+    return result;
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::operator/(
+    const Vector<Dimension, Type> &other) const
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = mData[i] / other.mData[i];
+    }
+    return result;
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::operator*(Type other) const
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = mData[i] * other;
+    }
+    return result;
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::operator/(Type other) const
+{
+    Vector<Dimension, Type> result;
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        result.mData[i] = mData[i] / other;
+    }
+    return result;
+}
+
+// Implementation of compound arithmetic operations
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> &VectorBase<Dimension, Type>::operator+=(
+    const Vector<Dimension, Type> &other)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        mData[i] += other.mData[i];
+    }
+    return *static_cast<Vector<Dimension, Type> *>(this);
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> &VectorBase<Dimension, Type>::operator-=(
+    const Vector<Dimension, Type> &other)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        mData[i] -= other.mData[i];
+    }
+    return *static_cast<Vector<Dimension, Type> *>(this);
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> &VectorBase<Dimension, Type>::operator*=(
+    const Vector<Dimension, Type> &other)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        mData[i] *= other.mData[i];
+    }
+    return *static_cast<Vector<Dimension, Type> *>(this);
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> &VectorBase<Dimension, Type>::operator/=(
+    const Vector<Dimension, Type> &other)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        mData[i] /= other.mData[i];
+    }
+    return *static_cast<Vector<Dimension, Type> *>(this);
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> &VectorBase<Dimension, Type>::operator*=(Type other)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        mData[i] *= other;
+    }
+    return *static_cast<Vector<Dimension, Type> *>(this);
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> &VectorBase<Dimension, Type>::operator/=(Type other)
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        mData[i] /= other;
+    }
+    return *static_cast<Vector<Dimension, Type> *>(this);
+}
+
+// Implementation of comparison operators
+template <size_t Dimension, typename Type>
+bool VectorBase<Dimension, Type>::operator==(const VectorBase<Dimension, Type> &other) const
+{
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        if (mData[i] != other.mData[i])
+        {
+            return false;
+        }
+    }
+    return true;
+}
+
+template <size_t Dimension, typename Type>
+bool VectorBase<Dimension, Type>::operator!=(const VectorBase<Dimension, Type> &other) const
+{
+    return !(*this == other);
+}
+
+// Implementation of other arithmetic operations
+template <size_t Dimension, typename Type>
+Type VectorBase<Dimension, Type>::length() const
+{
+    static_assert(std::is_floating_point<Type>::value,
+                  "VectorN::length is only defined for floating point vectors");
+    return std::sqrt(lengthSquared());
+}
+
+template <size_t Dimension, typename Type>
+Type VectorBase<Dimension, Type>::lengthSquared() const
+{
+    return dot(*this);
+}
+
+template <size_t Dimension, typename Type>
+Type VectorBase<Dimension, Type>::dot(const VectorBase<Dimension, Type> &other) const
+{
+    Type sum = Type();
+    for (size_t i = 0; i < Dimension; ++i)
+    {
+        sum += mData[i] * other.mData[i];
+    }
+    return sum;
+}
+
+template <size_t Dimension, typename Type>
+std::ostream &operator<<(std::ostream &ostream, const VectorBase<Dimension, Type> &vector)
+{
+    ostream << "[ ";
+    for (size_t elementIdx = 0; elementIdx < Dimension; elementIdx++)
+    {
+        if (elementIdx > 0)
+        {
+            ostream << ", ";
+        }
+        ostream << vector.data()[elementIdx];
+    }
+    ostream << " ]";
+    return ostream;
+}
+
+template <size_t Dimension, typename Type>
+Vector<Dimension, Type> VectorBase<Dimension, Type>::normalized() const
+{
+    static_assert(std::is_floating_point<Type>::value,
+                  "VectorN::normalized is only defined for floating point vectors");
+    return *this / length();
+}
+
+template <typename Type>
+std::ostream &operator<<(std::ostream &ostream, const Vector<2, Type> &vector)
+{
+    return ostream << static_cast<const VectorBase<2, Type> &>(vector);
+}
+
+template <typename Type>
+Vector<3, Type> Vector<3, Type>::cross(const Vector<3, Type> &other) const
+{
+    return Vector<3, Type>(y() * other.z() - z() * other.y(), z() * other.x() - x() * other.z(),
+                           x() * other.y() - y() * other.x());
+}
+
+template <typename Type>
+std::ostream &operator<<(std::ostream &ostream, const Vector<3, Type> &vector)
+{
+    return ostream << static_cast<const VectorBase<3, Type> &>(vector);
+}
+
+template <typename Type>
+std::ostream &operator<<(std::ostream &ostream, const Vector<4, Type> &vector)
+{
+    return ostream << static_cast<const VectorBase<4, Type> &>(vector);
+}
+
+}  // namespace angle
+
+#endif  // COMMON_VECTOR_UTILS_H_
diff --git a/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.cpp b/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.cpp
new file mode 100644
index 0000000000..dafe092732
--- /dev/null
+++ b/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.cpp
@@ -0,0 +1,57 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// libvulkan_loader.cpp:
+//    Helper functions for the loading Vulkan libraries.
+//
+
+#include "common/vulkan/libvulkan_loader.h"
+
+#include "common/system_utils.h"
+
+namespace angle
+{
+namespace vk
+{
+void *OpenLibVulkan()
+{
+    constexpr const char *kLibVulkanNames[] = {
+#if defined(ANGLE_PLATFORM_WINDOWS)
+        "vulkan-1.dll",
+#elif defined(ANGLE_PLATFORM_APPLE)
+        "libvulkan.dylib",
+        "libvulkan.1.dylib",
+        "libMoltenVK.dylib"
+#else
+        "libvulkan.so",
+        "libvulkan.so.1",
+#endif
+    };
+
+    constexpr SearchType kSearchTypes[] = {
+// On Android, Fuchsia and GGP we use the system libvulkan.
+#if defined(ANGLE_USE_CUSTOM_LIBVULKAN)
+        SearchType::ModuleDir,
+#else
+        SearchType::SystemDir,
+#endif  // defined(ANGLE_USE_CUSTOM_LIBVULKAN)
+    };
+
+    for (angle::SearchType searchType : kSearchTypes)
+    {
+        for (const char *libraryName : kLibVulkanNames)
+        {
+            void *library = OpenSystemLibraryWithExtension(libraryName, searchType);
+            if (library)
+            {
+                return library;
+            }
+        }
+    }
+
+    return nullptr;
+}
+}  // namespace vk
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.h b/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.h
new file mode 100644
index 0000000000..1a73c87b68
--- /dev/null
+++ b/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.h
@@ -0,0 +1,23 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// libvulkan_loader.h:
+//    Helper functions for the loading Vulkan libraries.
+//
+
+#include <memory>
+
+#ifndef LIBANGLE_COMMON_VULKAN_LIBVULKAN_LOADER_H_
+#    define LIBANGLE_COMMON_VULKAN_LIBVULKAN_LOADER_H_
+
+namespace angle
+{
+namespace vk
+{
+void *OpenLibVulkan();
+}
+}  // namespace angle
+
+#endif  // LIBANGLE_COMMON_VULKAN_LIBVULKAN_LOADER_H_
diff --git a/gfx/angle/checkout/src/common/vulkan/vk_google_filtering_precision.h b/gfx/angle/checkout/src/common/vulkan/vk_google_filtering_precision.h
new file mode 100644
index 0000000000..934dc793c6
--- /dev/null
+++ b/gfx/angle/checkout/src/common/vulkan/vk_google_filtering_precision.h
@@ -0,0 +1,57 @@
+// Copyright 2020 The SwiftShader Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CUSTOM_VK_GOOGLE_SAMPLER_FILTERING_PRECISION_H_
+#define CUSTOM_VK_GOOGLE_SAMPLER_FILTERING_PRECISION_H_
+
+#include "vk_headers.h"
+
+// THIS FILE SHOULD BE DELETED IF VK_GOOGLE_sampler_filtering_precision IS EVER ADDED TO THE VULKAN
+// HEADERS
+#ifdef VK_GOOGLE_sampler_filtering_precision
+#    error \
+        "VK_GOOGLE_sampler_filtering_precision is already defined in the Vulkan headers, you can delete this file"
+#endif
+
+static constexpr VkStructureType VK_STRUCTURE_TYPE_SAMPLER_FILTERING_PRECISION_GOOGLE =
+    static_cast<VkStructureType>(1000264000);
+
+#define VK_GOOGLE_sampler_filtering_precision 1
+#define VK_GOOGLE_SAMPLER_FILTERING_PRECISION_SPEC_VERSION 1
+#define VK_GOOGLE_SAMPLER_FILTERING_PRECISION_EXTENSION_NAME "VK_GOOGLE_sampler_filtering_precision"
+
+const int TEXTURE_FILTERING_HINT_CHROMIUM = 0x8AF0;
+
+typedef enum VkSamplerFilteringPrecisionModeGOOGLE
+{
+    VK_SAMPLER_FILTERING_PRECISION_MODE_LOW_GOOGLE  = 0,
+    VK_SAMPLER_FILTERING_PRECISION_MODE_HIGH_GOOGLE = 1,
+    VK_SAMPLER_FILTERING_PRECISION_MODE_BEGIN_RANGE_GOOGLE =
+        VK_SAMPLER_FILTERING_PRECISION_MODE_LOW_GOOGLE,
+    VK_SAMPLER_FILTERING_PRECISION_MODE_END_RANGE_GOOGLE =
+        VK_SAMPLER_FILTERING_PRECISION_MODE_HIGH_GOOGLE,
+    VK_SAMPLER_FILTERING_PRECISION_MODE_RANGE_SIZE_GOOGLE =
+        (VK_SAMPLER_FILTERING_PRECISION_MODE_HIGH_GOOGLE -
+         VK_SAMPLER_FILTERING_PRECISION_MODE_LOW_GOOGLE + 1),
+    VK_SAMPLER_FILTERING_PRECISION_MODE_MAX_ENUM_GOOGLE = 0x7FFFFFFF
+} VkSamplerFilteringPrecisionModeGOOGLE;
+
+typedef struct VkSamplerFilteringPrecisionGOOGLE
+{
+    VkStructureType sType;
+    const void *pNext;
+    VkSamplerFilteringPrecisionModeGOOGLE samplerFilteringPrecisionMode;
+} VkSamplerFilteringPrecisionGOOGLE;
+
+#endif  // CUSTOM_VK_GOOGLE_SAMPLER_FILTERING_PRECISION_H_
diff --git a/gfx/angle/checkout/src/common/vulkan/vk_headers.h b/gfx/angle/checkout/src/common/vulkan/vk_headers.h
new file mode 100644
index 0000000000..a16938a872
--- /dev/null
+++ b/gfx/angle/checkout/src/common/vulkan/vk_headers.h
@@ -0,0 +1,163 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// vk_headers:
+//    This file should be included to ensure the vulkan headers are included
+//
+
+#ifndef LIBANGLE_RENDERER_VULKAN_VK_HEADERS_H_
+#define LIBANGLE_RENDERER_VULKAN_VK_HEADERS_H_
+
+#if ANGLE_SHARED_LIBVULKAN
+#    include "third_party/volk/volk.h"
+#else
+#    include <vulkan/vulkan.h>
+#endif
+
+// For the unreleased VK_GOOGLEX_multisampled_render_to_single_sampled
+#if !defined(VK_GOOGLEX_multisampled_render_to_single_sampled)
+#    define VK_GOOGLEX_multisampled_render_to_single_sampled 1
+#    define VK_GOOGLEX_MULTISAMPLED_RENDER_TO_SINGLE_SAMPLED_SPEC_VERSION 1
+#    define VK_GOOGLEX_MULTISAMPLED_RENDER_TO_SINGLE_SAMPLED_EXTENSION_NAME \
+        "VK_GOOGLEX_multisampled_render_to_single_sampled"
+
+#    define VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTISAMPLED_RENDER_TO_SINGLE_SAMPLED_FEATURES_GOOGLEX \
+        ((VkStructureType)(1000376000))
+#    define VK_STRUCTURE_TYPE_MULTISAMPLED_RENDER_TO_SINGLE_SAMPLED_INFO_GOOGLEX \
+        ((VkStructureType)(1000376001))
+
+typedef struct VkPhysicalDeviceMultisampledRenderToSingleSampledFeaturesGOOGLEX
+{
+    VkStructureType sType;
+    const void *pNext;
+    VkBool32 multisampledRenderToSingleSampled;
+} VkPhysicalDeviceMultisampledRenderToSingleSampledFeaturesGOOGLEX;
+
+typedef struct VkMultisampledRenderToSingleSampledInfoGOOGLEX
+{
+    VkStructureType sType;
+    const void *pNext;
+    VkBool32 multisampledRenderToSingleSampledEnable;
+    VkSampleCountFlagBits rasterizationSamples;
+    VkResolveModeFlagBits depthResolveMode;
+    VkResolveModeFlagBits stencilResolveMode;
+} VkMultisampledRenderToSingleSampledInfoGOOGLEX;
+#endif /* VK_GOOGLEX_multisampled_render_to_single_sampled */
+
+#if !defined(ANGLE_SHARED_LIBVULKAN)
+
+namespace rx
+{
+// VK_EXT_debug_utils
+extern PFN_vkCreateDebugUtilsMessengerEXT vkCreateDebugUtilsMessengerEXT;
+extern PFN_vkDestroyDebugUtilsMessengerEXT vkDestroyDebugUtilsMessengerEXT;
+extern PFN_vkCmdBeginDebugUtilsLabelEXT vkCmdBeginDebugUtilsLabelEXT;
+extern PFN_vkCmdEndDebugUtilsLabelEXT vkCmdEndDebugUtilsLabelEXT;
+extern PFN_vkCmdInsertDebugUtilsLabelEXT vkCmdInsertDebugUtilsLabelEXT;
+extern PFN_vkSetDebugUtilsObjectNameEXT vkSetDebugUtilsObjectNameEXT;
+
+// VK_EXT_debug_report
+extern PFN_vkCreateDebugReportCallbackEXT vkCreateDebugReportCallbackEXT;
+extern PFN_vkDestroyDebugReportCallbackEXT vkDestroyDebugReportCallbackEXT;
+
+// VK_KHR_get_physical_device_properties2
+extern PFN_vkGetPhysicalDeviceProperties2KHR vkGetPhysicalDeviceProperties2KHR;
+extern PFN_vkGetPhysicalDeviceFeatures2KHR vkGetPhysicalDeviceFeatures2KHR;
+extern PFN_vkGetPhysicalDeviceMemoryProperties2KHR vkGetPhysicalDeviceMemoryProperties2KHR;
+
+// VK_KHR_external_semaphore_fd
+extern PFN_vkImportSemaphoreFdKHR vkImportSemaphoreFdKHR;
+
+// VK_EXT_external_memory_host
+extern PFN_vkGetMemoryHostPointerPropertiesEXT vkGetMemoryHostPointerPropertiesEXT;
+
+// VK_EXT_host_query_reset
+extern PFN_vkResetQueryPoolEXT vkResetQueryPoolEXT;
+
+// VK_EXT_transform_feedback
+extern PFN_vkCmdBindTransformFeedbackBuffersEXT vkCmdBindTransformFeedbackBuffersEXT;
+extern PFN_vkCmdBeginTransformFeedbackEXT vkCmdBeginTransformFeedbackEXT;
+extern PFN_vkCmdEndTransformFeedbackEXT vkCmdEndTransformFeedbackEXT;
+extern PFN_vkCmdBeginQueryIndexedEXT vkCmdBeginQueryIndexedEXT;
+extern PFN_vkCmdEndQueryIndexedEXT vkCmdEndQueryIndexedEXT;
+extern PFN_vkCmdDrawIndirectByteCountEXT vkCmdDrawIndirectByteCountEXT;
+
+// VK_KHR_get_memory_requirements2
+extern PFN_vkGetBufferMemoryRequirements2KHR vkGetBufferMemoryRequirements2KHR;
+extern PFN_vkGetImageMemoryRequirements2KHR vkGetImageMemoryRequirements2KHR;
+
+// VK_KHR_bind_memory2
+extern PFN_vkBindBufferMemory2KHR vkBindBufferMemory2KHR;
+extern PFN_vkBindImageMemory2KHR vkBindImageMemory2KHR;
+
+// VK_KHR_external_fence_capabilities
+extern PFN_vkGetPhysicalDeviceExternalFencePropertiesKHR
+    vkGetPhysicalDeviceExternalFencePropertiesKHR;
+
+// VK_KHR_external_fence_fd
+extern PFN_vkGetFenceFdKHR vkGetFenceFdKHR;
+extern PFN_vkImportFenceFdKHR vkImportFenceFdKHR;
+
+// VK_KHR_external_semaphore_capabilities
+extern PFN_vkGetPhysicalDeviceExternalSemaphorePropertiesKHR
+    vkGetPhysicalDeviceExternalSemaphorePropertiesKHR;
+
+// VK_KHR_sampler_ycbcr_conversion
+extern PFN_vkCreateSamplerYcbcrConversionKHR vkCreateSamplerYcbcrConversionKHR;
+extern PFN_vkDestroySamplerYcbcrConversionKHR vkDestroySamplerYcbcrConversionKHR;
+
+// VK_KHR_create_renderpass2
+extern PFN_vkCreateRenderPass2KHR vkCreateRenderPass2KHR;
+
+#    if defined(ANGLE_PLATFORM_FUCHSIA)
+// VK_FUCHSIA_imagepipe_surface
+extern PFN_vkCreateImagePipeSurfaceFUCHSIA vkCreateImagePipeSurfaceFUCHSIA;
+#    endif
+
+#    if defined(ANGLE_PLATFORM_ANDROID)
+extern PFN_vkGetAndroidHardwareBufferPropertiesANDROID vkGetAndroidHardwareBufferPropertiesANDROID;
+extern PFN_vkGetMemoryAndroidHardwareBufferANDROID vkGetMemoryAndroidHardwareBufferANDROID;
+#    endif
+
+#    if defined(ANGLE_PLATFORM_GGP)
+extern PFN_vkCreateStreamDescriptorSurfaceGGP vkCreateStreamDescriptorSurfaceGGP;
+#    endif  // defined(ANGLE_PLATFORM_GGP)
+
+// VK_KHR_shared_presentable_image
+extern PFN_vkGetSwapchainStatusKHR vkGetSwapchainStatusKHR;
+
+// VK_EXT_extended_dynamic_state
+extern PFN_vkCmdBindVertexBuffers2EXT vkCmdBindVertexBuffers2EXT;
+extern PFN_vkCmdSetCullModeEXT vkCmdSetCullModeEXT;
+extern PFN_vkCmdSetDepthBoundsTestEnableEXT vkCmdSetDepthBoundsTestEnableEXT;
+extern PFN_vkCmdSetDepthCompareOpEXT vkCmdSetDepthCompareOpEXT;
+extern PFN_vkCmdSetDepthTestEnableEXT vkCmdSetDepthTestEnableEXT;
+extern PFN_vkCmdSetDepthWriteEnableEXT vkCmdSetDepthWriteEnableEXT;
+extern PFN_vkCmdSetFrontFaceEXT vkCmdSetFrontFaceEXT;
+extern PFN_vkCmdSetPrimitiveTopologyEXT vkCmdSetPrimitiveTopologyEXT;
+extern PFN_vkCmdSetScissorWithCountEXT vkCmdSetScissorWithCountEXT;
+extern PFN_vkCmdSetStencilOpEXT vkCmdSetStencilOpEXT;
+extern PFN_vkCmdSetStencilTestEnableEXT vkCmdSetStencilTestEnableEXT;
+extern PFN_vkCmdSetViewportWithCountEXT vkCmdSetViewportWithCountEXT;
+
+// VK_EXT_extended_dynamic_state2
+extern PFN_vkCmdSetDepthBiasEnableEXT vkCmdSetDepthBiasEnableEXT;
+extern PFN_vkCmdSetLogicOpEXT vkCmdSetLogicOpEXT;
+extern PFN_vkCmdSetPatchControlPointsEXT vkCmdSetPatchControlPointsEXT;
+extern PFN_vkCmdSetPrimitiveRestartEnableEXT vkCmdSetPrimitiveRestartEnableEXT;
+extern PFN_vkCmdSetRasterizerDiscardEnableEXT vkCmdSetRasterizerDiscardEnableEXT;
+
+// VK_KHR_fragment_shading_rate
+extern PFN_vkGetPhysicalDeviceFragmentShadingRatesKHR vkGetPhysicalDeviceFragmentShadingRatesKHR;
+extern PFN_vkCmdSetFragmentShadingRateKHR vkCmdSetFragmentShadingRateKHR;
+
+// VK_GOOGLE_display_timing
+extern PFN_vkGetPastPresentationTimingGOOGLE vkGetPastPresentationTimingGOOGLE;
+
+}  // namespace rx
+
+#endif  // ANGLE_SHARED_LIBVULKAN
+
+#endif  // LIBANGLE_RENDERER_VULKAN_VK_HEADERS_H_
diff --git a/gfx/angle/checkout/src/common/vulkan/vulkan_icd.cpp b/gfx/angle/checkout/src/common/vulkan/vulkan_icd.cpp
new file mode 100644
index 0000000000..22502c0457
--- /dev/null
+++ b/gfx/angle/checkout/src/common/vulkan/vulkan_icd.cpp
@@ -0,0 +1,349 @@
+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// vulkan_icd.cpp : Helper for creating vulkan instances & selecting physical device.
+
+#include "common/vulkan/vulkan_icd.h"
+
+#include <functional>
+#include <vector>
+
+#include "common/Optional.h"
+#include "common/bitset_utils.h"
+#include "common/debug.h"
+#include "common/system_utils.h"
+
+#include "common/vulkan/vk_google_filtering_precision.h"
+
+namespace
+{
+void ResetEnvironmentVar(const char *variableName, const Optional<std::string> &value)
+{
+    if (!value.valid())
+    {
+        return;
+    }
+
+    if (value.value().empty())
+    {
+        angle::UnsetEnvironmentVar(variableName);
+    }
+    else
+    {
+        angle::SetEnvironmentVar(variableName, value.value().c_str());
+    }
+}
+}  // namespace
+
+namespace angle
+{
+
+namespace vk
+{
+
+namespace
+{
+
+[[maybe_unused]] const std::string WrapICDEnvironment(const char *icdEnvironment)
+{
+    // The libraries are bundled into the module directory
+    std::string ret = ConcatenatePath(angle::GetModuleDirectory(), icdEnvironment);
+    return ret;
+}
+
+[[maybe_unused]] constexpr char kLoaderLayersPathEnv[] = "VK_LAYER_PATH";
+[[maybe_unused]] constexpr char kLayerEnablesEnv[]     = "VK_LAYER_ENABLES";
+
+constexpr char kLoaderICDFilenamesEnv[]              = "VK_ICD_FILENAMES";
+constexpr char kANGLEPreferredDeviceEnv[]            = "ANGLE_PREFERRED_DEVICE";
+constexpr char kValidationLayersCustomSTypeListEnv[] = "VK_LAYER_CUSTOM_STYPE_LIST";
+constexpr char kNoDeviceSelect[]                     = "NODEVICE_SELECT";
+
+constexpr uint32_t kMockVendorID = 0xba5eba11;
+constexpr uint32_t kMockDeviceID = 0xf005ba11;
+constexpr char kMockDeviceName[] = "Vulkan Mock Device";
+
+constexpr uint32_t kGoogleVendorID      = 0x1AE0;
+constexpr uint32_t kSwiftShaderDeviceID = 0xC0DE;
+constexpr char kSwiftShaderDeviceName[] = "SwiftShader Device";
+
+using ICDFilterFunc = std::function<bool(const VkPhysicalDeviceProperties &)>;
+
+ICDFilterFunc GetFilterForICD(vk::ICD preferredICD)
+{
+    switch (preferredICD)
+    {
+        case vk::ICD::Mock:
+            return [](const VkPhysicalDeviceProperties &deviceProperties) {
+                return ((deviceProperties.vendorID == kMockVendorID) &&
+                        (deviceProperties.deviceID == kMockDeviceID) &&
+                        (strcmp(deviceProperties.deviceName, kMockDeviceName) == 0));
+            };
+        case vk::ICD::SwiftShader:
+            return [](const VkPhysicalDeviceProperties &deviceProperties) {
+                return ((deviceProperties.vendorID == kGoogleVendorID) &&
+                        (deviceProperties.deviceID == kSwiftShaderDeviceID) &&
+                        (strncmp(deviceProperties.deviceName, kSwiftShaderDeviceName,
+                                 strlen(kSwiftShaderDeviceName)) == 0));
+            };
+        default:
+            const std::string anglePreferredDevice =
+                angle::GetEnvironmentVar(kANGLEPreferredDeviceEnv);
+            return [anglePreferredDevice](const VkPhysicalDeviceProperties &deviceProperties) {
+                return (anglePreferredDevice == deviceProperties.deviceName);
+            };
+    }
+}
+
+}  // namespace
+
+// If we're loading the validation layers, we could be running from any random directory.
+// Change to the executable directory so we can find the layers, then change back to the
+// previous directory to be safe we don't disrupt the application.
+ScopedVkLoaderEnvironment::ScopedVkLoaderEnvironment(bool enableValidationLayers, vk::ICD icd)
+    : mEnableValidationLayers(enableValidationLayers),
+      mICD(icd),
+      mChangedCWD(false),
+      mChangedICDEnv(false),
+      mChangedNoDeviceSelect(false)
+{
+// Changing CWD and setting environment variables makes no sense on Android,
+// since this code is a part of Java application there.
+// Android Vulkan loader doesn't need this either.
+#if !defined(ANGLE_PLATFORM_ANDROID) && !defined(ANGLE_PLATFORM_GGP)
+    if (icd == vk::ICD::Mock)
+    {
+        if (!setICDEnvironment(WrapICDEnvironment(ANGLE_VK_MOCK_ICD_JSON).c_str()))
+        {
+            ERR() << "Error setting environment for Mock/Null Driver.";
+        }
+    }
+#    if defined(ANGLE_VK_SWIFTSHADER_ICD_JSON)
+    else if (icd == vk::ICD::SwiftShader)
+    {
+        if (!setICDEnvironment(WrapICDEnvironment(ANGLE_VK_SWIFTSHADER_ICD_JSON).c_str()))
+        {
+            ERR() << "Error setting environment for SwiftShader.";
+        }
+    }
+#    endif  // defined(ANGLE_VK_SWIFTSHADER_ICD_JSON)
+
+#    if !defined(ANGLE_PLATFORM_MACOS)
+    if (mEnableValidationLayers || icd != vk::ICD::Default)
+    {
+        const auto &cwd = angle::GetCWD();
+        if (!cwd.valid())
+        {
+            ERR() << "Error getting CWD for Vulkan layers init.";
+            mEnableValidationLayers = false;
+            mICD                    = vk::ICD::Default;
+        }
+        else
+        {
+            mPreviousCWD          = cwd.value();
+            std::string moduleDir = angle::GetModuleDirectory();
+            mChangedCWD           = angle::SetCWD(moduleDir.c_str());
+            if (!mChangedCWD)
+            {
+                ERR() << "Error setting CWD for Vulkan layers init.";
+                mEnableValidationLayers = false;
+                mICD                    = vk::ICD::Default;
+            }
+        }
+    }
+#    endif  // defined(ANGLE_PLATFORM_MACOS)
+
+    // Override environment variable to use the ANGLE layers.
+    if (mEnableValidationLayers)
+    {
+#    if defined(ANGLE_VK_LAYERS_DIR)
+        if (!angle::PrependPathToEnvironmentVar(kLoaderLayersPathEnv, ANGLE_VK_LAYERS_DIR))
+        {
+            ERR() << "Error setting environment for Vulkan layers init.";
+            mEnableValidationLayers = false;
+        }
+#    endif  // defined(ANGLE_VK_LAYERS_DIR)
+
+        if (!angle::PrependPathToEnvironmentVar(
+                kLayerEnablesEnv, "VK_VALIDATION_FEATURE_ENABLE_SYNCHRONIZATION_VALIDATION"))
+        {
+            ERR() << "Error setting synchronization validation environment for Vulkan validation "
+                     "layers init.";
+        }
+
+        if (!setCustomExtensionsEnvironment())
+        {
+            ERR() << "Error setting custom list for custom extensions for Vulkan layers init.";
+            mEnableValidationLayers = false;
+        }
+    }
+#endif  // !defined(ANGLE_PLATFORM_ANDROID)
+
+    if (IsMSan() || IsASan())
+    {
+        // device select layer cause memory sanitizer false positive, so disable
+        // it for msan build.
+        mPreviousNoDeviceSelectEnv = angle::GetEnvironmentVar(kNoDeviceSelect);
+        angle::SetEnvironmentVar(kNoDeviceSelect, "1");
+        mChangedNoDeviceSelect = true;
+    }
+}
+
+ScopedVkLoaderEnvironment::~ScopedVkLoaderEnvironment()
+{
+    if (mChangedCWD)
+    {
+#if !defined(ANGLE_PLATFORM_ANDROID)
+        ASSERT(mPreviousCWD.valid());
+        angle::SetCWD(mPreviousCWD.value().c_str());
+#endif  // !defined(ANGLE_PLATFORM_ANDROID)
+    }
+    if (mChangedICDEnv)
+    {
+        ResetEnvironmentVar(kLoaderICDFilenamesEnv, mPreviousICDEnv);
+    }
+
+    ResetEnvironmentVar(kValidationLayersCustomSTypeListEnv, mPreviousCustomExtensionsEnv);
+
+    if (mChangedNoDeviceSelect)
+    {
+        ResetEnvironmentVar(kNoDeviceSelect, mPreviousNoDeviceSelectEnv);
+    }
+}
+
+bool ScopedVkLoaderEnvironment::setICDEnvironment(const char *icd)
+{
+    // Override environment variable to use built Mock ICD
+    // ANGLE_VK_ICD_JSON gets set to the built mock ICD in BUILD.gn
+    mPreviousICDEnv = angle::GetEnvironmentVar(kLoaderICDFilenamesEnv);
+    mChangedICDEnv  = angle::SetEnvironmentVar(kLoaderICDFilenamesEnv, icd);
+
+    if (!mChangedICDEnv)
+    {
+        mICD = vk::ICD::Default;
+    }
+    return mChangedICDEnv;
+}
+
+bool ScopedVkLoaderEnvironment::setCustomExtensionsEnvironment()
+{
+    struct CustomExtension
+    {
+        VkStructureType type;
+        size_t size;
+    };
+
+    CustomExtension customExtensions[] = {
+
+        {VK_STRUCTURE_TYPE_SAMPLER_FILTERING_PRECISION_GOOGLE,
+         sizeof(VkSamplerFilteringPrecisionGOOGLE)},
+
+    };
+
+    mPreviousCustomExtensionsEnv = angle::GetEnvironmentVar(kValidationLayersCustomSTypeListEnv);
+
+    std::stringstream strstr;
+    for (CustomExtension &extension : customExtensions)
+    {
+        if (strstr.tellp() != std::streampos(0))
+        {
+            strstr << angle::GetPathSeparatorForEnvironmentVar();
+        }
+
+        strstr << extension.type << angle::GetPathSeparatorForEnvironmentVar() << extension.size;
+    }
+
+    return angle::PrependPathToEnvironmentVar(kValidationLayersCustomSTypeListEnv,
+                                              strstr.str().c_str());
+}
+
+void ChoosePhysicalDevice(PFN_vkGetPhysicalDeviceProperties pGetPhysicalDeviceProperties,
+                          const std::vector<VkPhysicalDevice> &physicalDevices,
+                          vk::ICD preferredICD,
+                          uint32_t preferredVendorID,
+                          uint32_t preferredDeviceID,
+                          VkPhysicalDevice *physicalDeviceOut,
+                          VkPhysicalDeviceProperties *physicalDevicePropertiesOut)
+{
+    ASSERT(!physicalDevices.empty());
+
+    ICDFilterFunc filter = GetFilterForICD(preferredICD);
+
+    const bool shouldChooseByID = (preferredVendorID != 0 || preferredDeviceID != 0);
+
+    for (const VkPhysicalDevice &physicalDevice : physicalDevices)
+    {
+        pGetPhysicalDeviceProperties(physicalDevice, physicalDevicePropertiesOut);
+        if (filter(*physicalDevicePropertiesOut))
+        {
+            *physicalDeviceOut = physicalDevice;
+            return;
+        }
+
+        if (shouldChooseByID)
+        {
+            // NOTE: If the system has multiple GPUs with the same vendor and
+            // device IDs, this will arbitrarily select one of them.
+            bool matchVendorID = true;
+            bool matchDeviceID = true;
+
+            if (preferredVendorID != 0 &&
+                preferredVendorID != physicalDevicePropertiesOut->vendorID)
+            {
+                matchVendorID = false;
+            }
+
+            if (preferredDeviceID != 0 &&
+                preferredDeviceID != physicalDevicePropertiesOut->deviceID)
+            {
+                matchDeviceID = false;
+            }
+
+            if (matchVendorID && matchDeviceID)
+            {
+                *physicalDeviceOut = physicalDevice;
+                return;
+            }
+        }
+    }
+
+    Optional<VkPhysicalDevice> integratedDevice;
+    VkPhysicalDeviceProperties integratedDeviceProperties;
+    for (const VkPhysicalDevice &physicalDevice : physicalDevices)
+    {
+        pGetPhysicalDeviceProperties(physicalDevice, physicalDevicePropertiesOut);
+        // If discrete GPU exists, uses it by default.
+        if (physicalDevicePropertiesOut->deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
+        {
+            *physicalDeviceOut = physicalDevice;
+            return;
+        }
+        if (physicalDevicePropertiesOut->deviceType == VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU &&
+            !integratedDevice.valid())
+        {
+            integratedDevice           = physicalDevice;
+            integratedDeviceProperties = *physicalDevicePropertiesOut;
+            continue;
+        }
+    }
+
+    // If only integrated GPU exists, use it by default.
+    if (integratedDevice.valid())
+    {
+        *physicalDeviceOut           = integratedDevice.value();
+        *physicalDevicePropertiesOut = integratedDeviceProperties;
+        return;
+    }
+
+    WARN() << "Preferred device ICD not found. Using default physicalDevice instead.";
+    // Fallback to the first device.
+    *physicalDeviceOut = physicalDevices[0];
+    pGetPhysicalDeviceProperties(*physicalDeviceOut, physicalDevicePropertiesOut);
+}
+
+}  // namespace vk
+
+}  // namespace angle
diff --git a/gfx/angle/checkout/src/common/vulkan/vulkan_icd.h b/gfx/angle/checkout/src/common/vulkan/vulkan_icd.h
new file mode 100644
index 0000000000..b2921f8203
--- /dev/null
+++ b/gfx/angle/checkout/src/common/vulkan/vulkan_icd.h
@@ -0,0 +1,72 @@
+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// vulkan_icd.h : Helper for creating vulkan instances & selecting physical device.
+
+#ifndef COMMON_VULKAN_VULKAN_ICD_H_
+#define COMMON_VULKAN_VULKAN_ICD_H_
+
+#include <string>
+
+#include "common/Optional.h"
+#include "common/angleutils.h"
+#include "common/vulkan/vk_headers.h"
+
+namespace angle
+{
+
+namespace vk
+{
+
+enum class ICD
+{
+    Default,
+    Mock,
+    SwiftShader,
+};
+
+struct SimpleDisplayWindow
+{
+    uint16_t width;
+    uint16_t height;
+};
+
+class [[nodiscard]] ScopedVkLoaderEnvironment : angle::NonCopyable
+{
+  public:
+    ScopedVkLoaderEnvironment(bool enableValidationLayers, vk::ICD icd);
+    ~ScopedVkLoaderEnvironment();
+
+    bool canEnableValidationLayers() const { return mEnableValidationLayers; }
+    vk::ICD getEnabledICD() const { return mICD; }
+
+  private:
+    bool setICDEnvironment(const char *icd);
+    bool setCustomExtensionsEnvironment();
+
+    bool mEnableValidationLayers;
+    vk::ICD mICD;
+    bool mChangedCWD;
+    Optional<std::string> mPreviousCWD;
+    bool mChangedICDEnv;
+    Optional<std::string> mPreviousICDEnv;
+    Optional<std::string> mPreviousCustomExtensionsEnv;
+    bool mChangedNoDeviceSelect;
+    Optional<std::string> mPreviousNoDeviceSelectEnv;
+};
+
+void ChoosePhysicalDevice(PFN_vkGetPhysicalDeviceProperties pGetPhysicalDeviceProperties,
+                          const std::vector<VkPhysicalDevice> &physicalDevices,
+                          vk::ICD preferredICD,
+                          uint32_t preferredVendorID,
+                          uint32_t preferredDeviceID,
+                          VkPhysicalDevice *physicalDeviceOut,
+                          VkPhysicalDeviceProperties *physicalDevicePropertiesOut);
+
+}  // namespace vk
+
+}  // namespace angle
+
+#endif  // COMMON_VULKAN_VULKAN_ICD_H_