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Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/blocklayout.h')
-rw-r--r-- | src/3rdparty/angle/src/compiler/translator/blocklayout.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/blocklayout.h b/src/3rdparty/angle/src/compiler/translator/blocklayout.h new file mode 100644 index 0000000000..c11357fe66 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/blocklayout.h @@ -0,0 +1,94 @@ +// +// 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 COMPILER_EXPORT BlockMemberInfo +{ + 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 COMPILER_EXPORT BlockLayoutEncoder +{ + public: + BlockLayoutEncoder(); + + BlockMemberInfo encodeType(GLenum type, unsigned int arraySize, bool isRowMajorMatrix); + + size_t getBlockSize() const { return mCurrentOffset * BytesPerComponent; } + size_t getCurrentRegister() const { return mCurrentOffset / ComponentsPerRegister; } + size_t getCurrentElement() const { return mCurrentOffset % ComponentsPerRegister; } + + 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 COMPILER_EXPORT Std140BlockEncoder : public BlockLayoutEncoder +{ + public: + Std140BlockEncoder(); + + virtual void enterAggregateType(); + virtual void exitAggregateType(); + + protected: + virtual void getBlockLayoutInfo(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int *arrayStrideOut, int *matrixStrideOut); + virtual void advanceOffset(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int arrayStride, int matrixStride); +}; + +} + +#endif // COMMON_BLOCKLAYOUT_H_ |