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

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• Hash : b5f87c04
  Author :
  Date : 2023-06-20T20:22:15
  

  Vulkan: Simplify shader interface variable map
  
  The shader interface variable map had a "resource index" -> info map to
  optimize descriptor set building.  That avoided hashing the resource
  name when the rest of the map was name-based.
  
  With the map using SPIR-V ids now, there is no reason to maintain this
  map; SPIR-V ids can be used to look up the info just as efficiently.
  
  Bug: angleproject:7220
  Change-Id: I619783dce558a59184955cc314c1f41e6733f1b7
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4630728
  Reviewed-by: Charlie Lao <cclao@google.com>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Yuxin Hu <yuxinhu@google.com>
  

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• src/libANGLE/Uniform.h

• //
  // 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 getFirstActiveShaderType() const
      {
          return static_cast<ShaderType>(ScanForward(mActiveUseBits.bits()));
      }
      void setActive(ShaderType shaderType, bool used, uint32_t id);
      void unionReferencesWith(const ActiveVariable &other);
      bool isActive(ShaderType shaderType) const
      {
          ASSERT(shaderType != ShaderType::InvalidEnum);
          return mActiveUseBits[shaderType];
      }
      bool isActiveInAny(ShaderBitSet shaderTypes) const
      {
          return (mActiveUseBits & shaderTypes).any();
      }
      const ShaderMap<uint32_t> &getIds() const { return mIds; }
      uint32_t getId(ShaderType shaderType) const { return mIds[shaderType]; }
      ShaderBitSet activeShaders() const { return mActiveUseBits; }
      GLuint activeShaderCount() const { return static_cast<GLuint>(mActiveUseBits.count()); }
  
    private:
      ShaderBitSet mActiveUseBits;
      // The id of a linked variable in each shader stage.  This id originates from
      // sh::ShaderVariable::id or sh::InterfaceBlock::id
      ShaderMap<uint32_t> mIds;
  };
  
  // 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,
                     bool isReadOnlyIn,
                     unsigned int arrayElementIn,
                     unsigned int firstFieldArraySizeIn,
                     int bindingIn);
      InterfaceBlock(const InterfaceBlock &other);
  
      std::string nameWithArrayIndex() const;
      std::string mappedNameWithArrayIndex() const;
  
      std::string name;
      std::string mappedName;
      bool isArray;
      // Only valid for SSBOs, specifies whether it has the readonly qualifier.
      bool isReadOnly;
      unsigned int arrayElement;
      unsigned int firstFieldArraySize;
  };
  
  }  // namespace gl
  
  #endif  // LIBANGLE_UNIFORM_H_
  

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