1 files changed, 138 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/Uniform.h b/gfx/angle/checkout/src/libANGLE/Uniform.h
new file mode 100644
index 0000000000..5c15906779
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/Uniform.h
@@ -0,0 +1,138 @@
+//
+// Copyright 2010 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 LIBANGLE_UNIFORM_H_
+#define LIBANGLE_UNIFORM_H_
+
+#include <string>
+#include <vector>
+
+#include "angle_gl.h"
+#include "common/MemoryBuffer.h"
+#include "common/debug.h"
+#include "common/utilities.h"
+#include "compiler/translator/blocklayout.h"
+#include "libANGLE/angletypes.h"
+
+namespace gl
+{
+struct UniformTypeInfo;
+
+struct ActiveVariable
+{
+    ActiveVariable();
+    ActiveVariable(const ActiveVariable &rhs);
+    virtual ~ActiveVariable();
+
+    ActiveVariable &operator=(const ActiveVariable &rhs);
+
+    ShaderType getFirstShaderTypeWhereActive() const;
+    void setActive(ShaderType shaderType, bool used);
+    void unionReferencesWith(const ActiveVariable &other);
+    bool isActive(ShaderType shaderType) const
+    {
+        ASSERT(shaderType != ShaderType::InvalidEnum);
+        return mActiveUseBits[shaderType];
+    }
+    ShaderBitSet activeShaders() const { return mActiveUseBits; }
+    GLuint activeShaderCount() const;
+
+  private:
+    ShaderBitSet mActiveUseBits;
+};
+
+// Helper struct representing a single shader uniform
+struct LinkedUniform : public sh::ShaderVariable, public ActiveVariable
+{
+    LinkedUniform();
+    LinkedUniform(GLenum type,
+                  GLenum precision,
+                  const std::string &name,
+                  const std::vector<unsigned int> &arraySizes,
+                  const int binding,
+                  const int offset,
+                  const int location,
+                  const int bufferIndex,
+                  const sh::BlockMemberInfo &blockInfo);
+    LinkedUniform(const sh::ShaderVariable &uniform);
+    LinkedUniform(const LinkedUniform &uniform);
+    LinkedUniform &operator=(const LinkedUniform &uniform);
+    ~LinkedUniform() override;
+
+    bool isSampler() const { return typeInfo->isSampler; }
+    bool isImage() const { return typeInfo->isImageType; }
+    bool isAtomicCounter() const { return IsAtomicCounterType(type); }
+    bool isInDefaultBlock() const { return bufferIndex == -1; }
+    bool isField() const { return name.find('.') != std::string::npos; }
+    size_t getElementSize() const { return typeInfo->externalSize; }
+    size_t getElementComponents() const { return typeInfo->componentCount; }
+
+    const UniformTypeInfo *typeInfo;
+
+    // Identifies the containing buffer backed resource -- interface block or atomic counter buffer.
+    int bufferIndex;
+    sh::BlockMemberInfo blockInfo;
+    std::vector<unsigned int> outerArraySizes;
+    unsigned int outerArrayOffset;
+};
+
+struct BufferVariable : public sh::ShaderVariable, public ActiveVariable
+{
+    BufferVariable();
+    BufferVariable(GLenum type,
+                   GLenum precision,
+                   const std::string &name,
+                   const std::vector<unsigned int> &arraySizes,
+                   const int bufferIndex,
+                   const sh::BlockMemberInfo &blockInfo);
+    ~BufferVariable() override;
+
+    int bufferIndex;
+    sh::BlockMemberInfo blockInfo;
+
+    int topLevelArraySize;
+};
+
+// Parent struct for atomic counter, uniform block, and shader storage block buffer, which all
+// contain a group of shader variables, and have a GL buffer backed.
+struct ShaderVariableBuffer : public ActiveVariable
+{
+    ShaderVariableBuffer();
+    ShaderVariableBuffer(const ShaderVariableBuffer &other);
+    ~ShaderVariableBuffer() override;
+    int numActiveVariables() const;
+
+    int binding;
+    unsigned int dataSize;
+    std::vector<unsigned int> memberIndexes;
+};
+
+using AtomicCounterBuffer = ShaderVariableBuffer;
+
+// Helper struct representing a single shader interface block
+struct InterfaceBlock : public ShaderVariableBuffer
+{
+    InterfaceBlock();
+    InterfaceBlock(const std::string &nameIn,
+                   const std::string &mappedNameIn,
+                   bool isArrayIn,
+                   unsigned int arrayElementIn,
+                   unsigned int firstFieldArraySizeIn,
+                   int bindingIn);
+
+    std::string nameWithArrayIndex() const;
+    std::string mappedNameWithArrayIndex() const;
+
+    std::string name;
+    std::string mappedName;
+    bool isArray;
+    unsigned int arrayElement;
+    unsigned int firstFieldArraySize;
+};
+
+}  // namespace gl
+
+#endif  // LIBANGLE_UNIFORM_H_