1 files changed, 284 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/Buffer.cpp b/gfx/angle/checkout/src/libANGLE/Buffer.cpp
new file mode 100644
index 0000000000..9ffcddba24
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/Buffer.cpp
@@ -0,0 +1,284 @@
+//
+// Copyright (c) 2002-2014 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.
+//
+
+// Buffer.cpp: Implements the gl::Buffer class, representing storage of vertex and/or
+// index data. Implements GL buffer objects and related functionality.
+// [OpenGL ES 2.0.24] section 2.9 page 21.
+
+#include "libANGLE/Buffer.h"
+
+#include "libANGLE/Context.h"
+#include "libANGLE/renderer/BufferImpl.h"
+#include "libANGLE/renderer/GLImplFactory.h"
+
+namespace gl
+{
+namespace
+{
+constexpr angle::SubjectIndex kImplementationSubjectIndex = 0;
+}  // anonymous namespace
+
+BufferState::BufferState()
+    : mLabel(),
+      mUsage(BufferUsage::StaticDraw),
+      mSize(0),
+      mAccessFlags(0),
+      mAccess(GL_WRITE_ONLY_OES),
+      mMapped(GL_FALSE),
+      mMapPointer(nullptr),
+      mMapOffset(0),
+      mMapLength(0),
+      mBindingCount(0),
+      mTransformFeedbackIndexedBindingCount(0),
+      mTransformFeedbackGenericBindingCount(0)
+{}
+
+BufferState::~BufferState() {}
+
+Buffer::Buffer(rx::GLImplFactory *factory, GLuint id)
+    : RefCountObject(id),
+      mImpl(factory->createBuffer(mState)),
+      mImplObserver(this, kImplementationSubjectIndex)
+{
+    mImplObserver.bind(mImpl);
+}
+
+Buffer::~Buffer()
+{
+    SafeDelete(mImpl);
+}
+
+void Buffer::onDestroy(const Context *context)
+{
+    // In tests, mImpl might be null.
+    if (mImpl)
+        mImpl->destroy(context);
+}
+
+void Buffer::setLabel(const Context *context, const std::string &label)
+{
+    mState.mLabel = label;
+}
+
+const std::string &Buffer::getLabel() const
+{
+    return mState.mLabel;
+}
+
+angle::Result Buffer::bufferData(Context *context,
+                                 BufferBinding target,
+                                 const void *data,
+                                 GLsizeiptr size,
+                                 BufferUsage usage)
+{
+    const void *dataForImpl = data;
+
+    // If we are using robust resource init, make sure the buffer starts cleared.
+    // Note: the Context is checked for nullptr because of some testing code.
+    // TODO(jmadill): Investigate lazier clearing.
+    if (context && context->getState().isRobustResourceInitEnabled() && !data && size > 0)
+    {
+        angle::MemoryBuffer *scratchBuffer = nullptr;
+        ANGLE_CHECK_GL_ALLOC(
+            context, context->getZeroFilledBuffer(static_cast<size_t>(size), &scratchBuffer));
+        dataForImpl = scratchBuffer->data();
+    }
+
+    ANGLE_TRY(mImpl->setData(context, target, dataForImpl, size, usage));
+
+    mIndexRangeCache.clear();
+    mState.mUsage = usage;
+    mState.mSize  = size;
+
+    // Notify when storage changes.
+    onStateChange(angle::SubjectMessage::SubjectChanged);
+
+    return angle::Result::Continue;
+}
+
+angle::Result Buffer::bufferSubData(const Context *context,
+                                    BufferBinding target,
+                                    const void *data,
+                                    GLsizeiptr size,
+                                    GLintptr offset)
+{
+    ANGLE_TRY(mImpl->setSubData(context, target, data, size, offset));
+
+    mIndexRangeCache.invalidateRange(static_cast<unsigned int>(offset),
+                                     static_cast<unsigned int>(size));
+
+    // Notify when data changes.
+    onStateChange(angle::SubjectMessage::ContentsChanged);
+
+    return angle::Result::Continue;
+}
+
+angle::Result Buffer::copyBufferSubData(const Context *context,
+                                        Buffer *source,
+                                        GLintptr sourceOffset,
+                                        GLintptr destOffset,
+                                        GLsizeiptr size)
+{
+    ANGLE_TRY(
+        mImpl->copySubData(context, source->getImplementation(), sourceOffset, destOffset, size));
+
+    mIndexRangeCache.invalidateRange(static_cast<unsigned int>(destOffset),
+                                     static_cast<unsigned int>(size));
+
+    // Notify when data changes.
+    onStateChange(angle::SubjectMessage::ContentsChanged);
+
+    return angle::Result::Continue;
+}
+
+angle::Result Buffer::map(const Context *context, GLenum access)
+{
+    ASSERT(!mState.mMapped);
+
+    mState.mMapPointer = nullptr;
+    ANGLE_TRY(mImpl->map(context, access, &mState.mMapPointer));
+
+    ASSERT(access == GL_WRITE_ONLY_OES);
+
+    mState.mMapped      = GL_TRUE;
+    mState.mMapOffset   = 0;
+    mState.mMapLength   = mState.mSize;
+    mState.mAccess      = access;
+    mState.mAccessFlags = GL_MAP_WRITE_BIT;
+    mIndexRangeCache.clear();
+
+    // Notify when state changes.
+    onStateChange(angle::SubjectMessage::SubjectMapped);
+
+    return angle::Result::Continue;
+}
+
+angle::Result Buffer::mapRange(const Context *context,
+                               GLintptr offset,
+                               GLsizeiptr length,
+                               GLbitfield access)
+{
+    ASSERT(!mState.mMapped);
+    ASSERT(offset + length <= mState.mSize);
+
+    mState.mMapPointer = nullptr;
+    ANGLE_TRY(mImpl->mapRange(context, offset, length, access, &mState.mMapPointer));
+
+    mState.mMapped      = GL_TRUE;
+    mState.mMapOffset   = static_cast<GLint64>(offset);
+    mState.mMapLength   = static_cast<GLint64>(length);
+    mState.mAccess      = GL_WRITE_ONLY_OES;
+    mState.mAccessFlags = access;
+
+    // The OES_mapbuffer extension states that GL_WRITE_ONLY_OES is the only valid
+    // value for GL_BUFFER_ACCESS_OES because it was written against ES2.  Since there is
+    // no update for ES3 and the GL_READ_ONLY and GL_READ_WRITE enums don't exist for ES,
+    // we cannot properly set GL_BUFFER_ACCESS_OES when glMapBufferRange is called.
+
+    if ((access & GL_MAP_WRITE_BIT) > 0)
+    {
+        mIndexRangeCache.invalidateRange(static_cast<unsigned int>(offset),
+                                         static_cast<unsigned int>(length));
+    }
+
+    // Notify when state changes.
+    onStateChange(angle::SubjectMessage::SubjectMapped);
+
+    return angle::Result::Continue;
+}
+
+angle::Result Buffer::unmap(const Context *context, GLboolean *result)
+{
+    ASSERT(mState.mMapped);
+
+    *result = GL_FALSE;
+    ANGLE_TRY(mImpl->unmap(context, result));
+
+    mState.mMapped      = GL_FALSE;
+    mState.mMapPointer  = nullptr;
+    mState.mMapOffset   = 0;
+    mState.mMapLength   = 0;
+    mState.mAccess      = GL_WRITE_ONLY_OES;
+    mState.mAccessFlags = 0;
+
+    // Notify when data changes.
+    onStateChange(angle::SubjectMessage::SubjectUnmapped);
+
+    return angle::Result::Continue;
+}
+
+void Buffer::onTransformFeedback()
+{
+    mIndexRangeCache.clear();
+
+    // Notify when data changes.
+    onStateChange(angle::SubjectMessage::ContentsChanged);
+}
+
+void Buffer::onPixelPack()
+{
+    mIndexRangeCache.clear();
+
+    // Notify when data changes.
+    onStateChange(angle::SubjectMessage::ContentsChanged);
+}
+
+angle::Result Buffer::getIndexRange(const gl::Context *context,
+                                    DrawElementsType type,
+                                    size_t offset,
+                                    size_t count,
+                                    bool primitiveRestartEnabled,
+                                    IndexRange *outRange) const
+{
+    if (mIndexRangeCache.findRange(type, offset, count, primitiveRestartEnabled, outRange))
+    {
+        return angle::Result::Continue;
+    }
+
+    ANGLE_TRY(
+        mImpl->getIndexRange(context, type, offset, count, primitiveRestartEnabled, outRange));
+
+    mIndexRangeCache.addRange(type, offset, count, primitiveRestartEnabled, *outRange);
+
+    return angle::Result::Continue;
+}
+
+GLint64 Buffer::getMemorySize() const
+{
+    GLint64 implSize = mImpl->getMemorySize();
+    return implSize > 0 ? implSize : mState.mSize;
+}
+
+bool Buffer::isDoubleBoundForTransformFeedback() const
+{
+    return mState.mTransformFeedbackIndexedBindingCount > 1;
+}
+
+void Buffer::onTFBindingChanged(const Context *context, bool bound, bool indexed)
+{
+    ASSERT(bound || mState.mBindingCount > 0);
+    mState.mBindingCount += bound ? 1 : -1;
+    if (indexed)
+    {
+        ASSERT(bound || mState.mTransformFeedbackIndexedBindingCount > 0);
+        mState.mTransformFeedbackIndexedBindingCount += bound ? 1 : -1;
+
+        onStateChange(angle::SubjectMessage::BindingChanged);
+    }
+    else
+    {
+        mState.mTransformFeedbackGenericBindingCount += bound ? 1 : -1;
+    }
+}
+
+void Buffer::onSubjectStateChange(angle::SubjectIndex index, angle::SubjectMessage message)
+{
+    // Pass it along!
+    ASSERT(index == kImplementationSubjectIndex);
+    ASSERT(message == angle::SubjectMessage::SubjectChanged);
+    onStateChange(angle::SubjectMessage::SubjectChanged);
+}
+}  // namespace gl