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

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• Author : jchen10
  Date : 2017-06-13 10:44:11
  Hash : eaef1e5e
  Message : 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

• src/libANGLE/UniformLinker.h

• //
  // Copyright (c) 2017 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.
  //
  
  // UniformLinker.h: implements link-time checks for default block uniforms, and generates uniform
  // locations. Populates data structures related to uniforms so that they can be stored in program
  // state.
  
  #ifndef LIBANGLE_UNIFORMLINKER_H_
  #define LIBANGLE_UNIFORMLINKER_H_
  
  #include "libANGLE/Program.h"
  #include "libANGLE/Uniform.h"
  
  namespace gl
  {
  
  class UniformLinker
  {
    public:
      UniformLinker(const ProgramState &state);
  
      bool link(const Context *context,
                InfoLog &infoLog,
                const Program::Bindings &uniformLocationBindings);
  
      void getResults(std::vector<LinkedUniform> *uniforms,
                      std::vector<VariableLocation> *uniformLocations);
  
    private:
      struct ShaderUniformCount
      {
          ShaderUniformCount() : vectorCount(0), samplerCount(0), imageCount(0), atomicCounterCount(0)
          {
          }
          ShaderUniformCount(const ShaderUniformCount &other) = default;
          ShaderUniformCount &operator=(const ShaderUniformCount &other) = default;
  
          ShaderUniformCount &operator+=(const ShaderUniformCount &other)
          {
              vectorCount += other.vectorCount;
              samplerCount += other.samplerCount;
              imageCount += other.imageCount;
              atomicCounterCount += other.atomicCounterCount;
              return *this;
          }
  
          unsigned int vectorCount;
          unsigned int samplerCount;
          unsigned int imageCount;
          unsigned int atomicCounterCount;
      };
  
      bool validateVertexAndFragmentUniforms(const Context *context, InfoLog &infoLog) const;
  
      static bool linkValidateUniforms(InfoLog &infoLog,
                                       const std::string &uniformName,
                                       const sh::Uniform &vertexUniform,
                                       const sh::Uniform &fragmentUniform);
  
      bool flattenUniformsAndCheckCapsForShader(const Context *context,
                                                Shader *shader,
                                                GLuint maxUniformComponents,
                                                GLuint maxTextureImageUnits,
                                                GLuint maxImageUnits,
                                                GLuint maxAtomicCounters,
                                                const std::string &componentsErrorMessage,
                                                const std::string &samplerErrorMessage,
                                                const std::string &imageErrorMessage,
                                                const std::string &atomicCounterErrorMessage,
                                                std::vector<LinkedUniform> &samplerUniforms,
                                                std::vector<LinkedUniform> &imageUniforms,
                                                std::vector<LinkedUniform> &atomicCounterUniforms,
                                                InfoLog &infoLog);
  
      bool flattenUniformsAndCheckCaps(const Context *context, InfoLog &infoLog);
      bool checkMaxCombinedAtomicCounters(const Caps &caps, InfoLog &infoLog);
  
      ShaderUniformCount flattenUniform(const sh::Uniform &uniform,
                                        std::vector<LinkedUniform> *samplerUniforms,
                                        std::vector<LinkedUniform> *imageUniforms,
                                        std::vector<LinkedUniform> *atomicCounterUniforms);
  
      // markStaticUse is given as a separate parameter because it is tracked here at struct
      // granularity.
      ShaderUniformCount flattenUniformImpl(const sh::ShaderVariable &uniform,
                                            const std::string &fullName,
                                            std::vector<LinkedUniform> *samplerUniforms,
                                            std::vector<LinkedUniform> *imageUniforms,
                                            std::vector<LinkedUniform> *atomicCounterUniforms,
                                            bool markStaticUse,
                                            int binding,
                                            int offset,
                                            int *location);
  
      bool indexUniforms(InfoLog &infoLog, const Program::Bindings &uniformLocationBindings);
      bool gatherUniformLocationsAndCheckConflicts(InfoLog &infoLog,
                                                   const Program::Bindings &uniformLocationBindings,
                                                   std::set<GLuint> *reservedLocations,
                                                   std::set<GLuint> *ignoredLocations,
                                                   int *maxUniformLocation);
      void pruneUnusedUniforms();
  
      const ProgramState &mState;
      std::vector<LinkedUniform> mUniforms;
      std::vector<VariableLocation> mUniformLocations;
  };
  
  }  // namespace gl
  
  #endif  // LIBANGLE_UNIFORMLINKER_H_