1 files changed, 103 insertions, 0 deletions
diff --git a/gfx/angle/src/compiler/translator/blocklayout.h b/gfx/angle/src/compiler/translator/blocklayout.h
new file mode 100755
index 000000000..298a72c92
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/blocklayout.h
@@ -0,0 +1,103 @@
+//
+// Copyright (c) 2013-2014 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.
+//
+// blocklayout.h:
+//   Methods and classes related to uniform layout and packing in GLSL and HLSL.
+//
+
+#ifndef COMMON_BLOCKLAYOUT_H_
+#define COMMON_BLOCKLAYOUT_H_
+
+#include <cstddef>
+#include <vector>
+
+#include "angle_gl.h"
+#include <GLSLANG/ShaderLang.h>
+
+namespace sh
+{
+struct ShaderVariable;
+struct InterfaceBlockField;
+struct Uniform;
+struct Varying;
+struct InterfaceBlock;
+
+struct BlockMemberInfo
+{
+    BlockMemberInfo() : offset(-1), arrayStride(-1), matrixStride(-1), isRowMajorMatrix(false) {}
+
+    BlockMemberInfo(int offset, int arrayStride, int matrixStride, bool isRowMajorMatrix)
+        : offset(offset),
+          arrayStride(arrayStride),
+          matrixStride(matrixStride),
+          isRowMajorMatrix(isRowMajorMatrix)
+    {}
+
+    static BlockMemberInfo getDefaultBlockInfo()
+    {
+        return BlockMemberInfo(-1, -1, -1, false);
+    }
+
+    int offset;
+    int arrayStride;
+    int matrixStride;
+    bool isRowMajorMatrix;
+};
+
+class BlockLayoutEncoder
+{
+  public:
+    BlockLayoutEncoder();
+    virtual ~BlockLayoutEncoder() {}
+
+    BlockMemberInfo encodeType(GLenum type, unsigned int arraySize, bool isRowMajorMatrix);
+
+    size_t getBlockSize() const { return mCurrentOffset * BytesPerComponent; }
+
+    virtual void enterAggregateType() = 0;
+    virtual void exitAggregateType() = 0;
+
+    static const size_t BytesPerComponent = 4u;
+    static const unsigned int ComponentsPerRegister = 4u;
+
+    static size_t getBlockRegister(const BlockMemberInfo &info);
+    static size_t getBlockRegisterElement(const BlockMemberInfo &info);
+
+  protected:
+    size_t mCurrentOffset;
+
+    void nextRegister();
+
+    virtual void getBlockLayoutInfo(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int *arrayStrideOut, int *matrixStrideOut) = 0;
+    virtual void advanceOffset(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int arrayStride, int matrixStride) = 0;
+};
+
+// Block layout according to the std140 block layout
+// See "Standard Uniform Block Layout" in Section 2.11.6 of the OpenGL ES 3.0 specification
+
+class Std140BlockEncoder : public BlockLayoutEncoder
+{
+  public:
+    Std140BlockEncoder();
+
+    void enterAggregateType() override;
+    void exitAggregateType() override;
+
+  protected:
+    void getBlockLayoutInfo(GLenum type,
+                            unsigned int arraySize,
+                            bool isRowMajorMatrix,
+                            int *arrayStrideOut,
+                            int *matrixStrideOut) override;
+    void advanceOffset(GLenum type,
+                       unsigned int arraySize,
+                       bool isRowMajorMatrix,
+                       int arrayStride,
+                       int matrixStride) override;
+};
+
+}
+
+#endif // COMMON_BLOCKLAYOUT_H_