kc3-lang/angle/src/libANGLE/Uniform.h

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• Hash : eaef1e5e
  Author :
  Date : 2017-06-13T10:44:11
  

  Link atomic counters to buffers
  
  Gather counters from each shader and group them according the
  layout qualifier 'binding' into each buffer.
  
  BUG=angleproject:1729
  TEST=angle_end2end_tests:AtomicCounterBufferTest
  
  Change-Id: I8d0cd0d2bf65be37c035b0e1540481c8bee0bae4
  

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• src/libANGLE/Uniform.h

• //
  // Copyright (c) 2010-2013 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.
  //
  
  #ifndef LIBANGLE_UNIFORM_H_
  #define LIBANGLE_UNIFORM_H_
  
  #include <string>
  #include <vector>
  
  #include "angle_gl.h"
  #include "common/debug.h"
  #include "common/MemoryBuffer.h"
  #include "compiler/translator/blocklayout.h"
  #include "libANGLE/angletypes.h"
  
  namespace gl
  {
  
  // Helper struct representing a single shader uniform
  struct LinkedUniform : public sh::Uniform
  {
      LinkedUniform();
      LinkedUniform(GLenum type,
                    GLenum precision,
                    const std::string &name,
                    unsigned int arraySize,
                    const int binding,
                    const int offset,
                    const int location,
                    const int bufferIndex,
                    const sh::BlockMemberInfo &blockInfo);
      LinkedUniform(const sh::Uniform &uniform);
      LinkedUniform(const LinkedUniform &uniform);
      LinkedUniform &operator=(const LinkedUniform &uniform);
      ~LinkedUniform();
  
      size_t dataSize() const;
      uint8_t *data();
      const uint8_t *data() const;
      bool isSampler() const;
      bool isImage() const;
      bool isAtomicCounter() const;
      bool isInDefaultBlock() const;
      bool isField() const;
      size_t getElementSize() const;
      size_t getElementComponents() const;
      uint8_t *getDataPtrToElement(size_t elementIndex);
      const uint8_t *getDataPtrToElement(size_t elementIndex) const;
  
      // Identifies the containing buffer backed resource -- interface block or atomic counter buffer.
      int bufferIndex;
      sh::BlockMemberInfo blockInfo;
  
    private:
      mutable angle::MemoryBuffer mLazyData;
  };
  
  // 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
  {
      ShaderVariableBuffer();
      virtual ~ShaderVariableBuffer();
      ShaderVariableBuffer(const ShaderVariableBuffer &other) = default;
      ShaderVariableBuffer &operator=(const ShaderVariableBuffer &other) = default;
      int numActiveVariables() const { return static_cast<int>(memberIndexes.size()); }
  
      int binding;
      unsigned int dataSize;
      std::vector<unsigned int> memberIndexes;
  
      bool vertexStaticUse;
      bool fragmentStaticUse;
      bool computeStaticUse;
  };
  
  using AtomicCounterBuffer = ShaderVariableBuffer;
  
  // Helper struct representing a single shader uniform block
  struct UniformBlock : public ShaderVariableBuffer
  {
      UniformBlock();
      UniformBlock(const std::string &nameIn,
                   bool isArrayIn,
                   unsigned int arrayElementIn,
                   int bindingIn);
      UniformBlock(const UniformBlock &other) = default;
      UniformBlock &operator=(const UniformBlock &other) = default;
  
      std::string nameWithArrayIndex() const;
  
      std::string name;
      bool isArray;
      unsigned int arrayElement;
  };
  
  }
  
  #endif   // LIBANGLE_UNIFORM_H_
  

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