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

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• Hash : 80d7725d
  Author :
  Date : 2020-07-15T15:14:17
  

  Use Subject/Observer pattern for Programs/Executables in PPOs
  
  This CL updates the frontend to use the subject/observer pattern for
  Programs and ProgramExecutables in PPOs.
  
  This allows us to remove the hack that iterated through all PPOs and
  marking them all dirty when a Program is re-linked. Instead, just the
  PPOs the Program is bound to are signalled, and only when the Program
  is in a PPO.
  
  Additionally the necessary PPOs are signalled when an Executable's
  textures are updated, rather than iterating through all PPOs and
  signalling them.
  
  Bug: angleproject:4559
  Test: CQ
  Change-Id: Iaefb88c64c13259e921c8dfe95cf640247d17f85
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2300705
  Commit-Queue: Tim Van Patten <timvp@google.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Charlie Lao <cclao@google.com>
  

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• src/libANGLE/ProgramPipeline.h

• //
  // Copyright 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.
  //
  
  // ProgramPipeline.h: Defines the gl::ProgramPipeline class.
  // Implements GL program pipeline objects and related functionality.
  // [OpenGL ES 3.1] section 7.4 page 105.
  
  #ifndef LIBANGLE_PROGRAMPIPELINE_H_
  #define LIBANGLE_PROGRAMPIPELINE_H_
  
  #include <memory>
  
  #include "common/angleutils.h"
  #include "libANGLE/Debug.h"
  #include "libANGLE/Program.h"
  #include "libANGLE/ProgramExecutable.h"
  #include "libANGLE/RefCountObject.h"
  
  namespace rx
  {
  class GLImplFactory;
  class ProgramPipelineImpl;
  }  // namespace rx
  
  namespace gl
  {
  class Context;
  class ProgramPipeline;
  
  class ProgramPipelineState final : angle::NonCopyable
  {
    public:
      ProgramPipelineState();
      ~ProgramPipelineState();
  
      const std::string &getLabel() const;
  
      const ProgramExecutable &getProgramExecutable() const
      {
          ASSERT(mExecutable);
          return *mExecutable;
      }
      ProgramExecutable &getProgramExecutable()
      {
          ASSERT(mExecutable);
          return *mExecutable;
      }
  
      void activeShaderProgram(Program *shaderProgram);
      void useProgramStages(const Context *context,
                            GLbitfield stages,
                            Program *shaderProgram,
                            std::vector<angle::ObserverBinding> *programObserverBindings);
  
      Program *getActiveShaderProgram() { return mActiveShaderProgram; }
  
      GLboolean isValid() const { return mValid; }
  
      const Program *getShaderProgram(ShaderType shaderType) const { return mPrograms[shaderType]; }
  
      bool usesShaderProgram(ShaderProgramID program) const;
  
      void updateExecutableTextures();
  
    private:
      void useProgramStage(const Context *context,
                           ShaderType shaderType,
                           Program *shaderProgram,
                           angle::ObserverBinding *programObserverBindings);
  
      friend class ProgramPipeline;
  
      std::string mLabel;
  
      // The active shader program
      Program *mActiveShaderProgram;
      // The shader programs for each stage.
      ShaderMap<Program *> mPrograms;
  
      GLboolean mValid;
  
      ProgramExecutable *mExecutable;
  };
  
  class ProgramPipeline final : public RefCountObject<ProgramPipelineID>,
                                public LabeledObject,
                                public angle::ObserverInterface,
                                public angle::Subject
  {
    public:
      ProgramPipeline(rx::GLImplFactory *factory, ProgramPipelineID handle);
      ~ProgramPipeline() override;
  
      void onDestroy(const Context *context) override;
  
      void setLabel(const Context *context, const std::string &label) override;
      const std::string &getLabel() const override;
  
      const ProgramPipelineState &getState() const { return mState; }
  
      const ProgramExecutable &getExecutable() const { return mState.getProgramExecutable(); }
      ProgramExecutable &getExecutable() { return mState.getProgramExecutable(); }
  
      rx::ProgramPipelineImpl *getImplementation() const;
  
      Program *getActiveShaderProgram() { return mState.getActiveShaderProgram(); }
      void activeShaderProgram(Program *shaderProgram);
      Program *getLinkedActiveShaderProgram(const Context *context)
      {
          Program *program = mState.getActiveShaderProgram();
          if (program)
          {
              program->resolveLink(context);
          }
          return program;
      }
  
      void useProgramStages(const Context *context, GLbitfield stages, Program *shaderProgram);
  
      Program *getShaderProgram(ShaderType shaderType) const { return mState.mPrograms[shaderType]; }
  
      ProgramMergedVaryings getMergedVaryings() const;
      angle::Result link(const gl::Context *context);
      bool linkVaryings(InfoLog &infoLog) const;
      void validate(const gl::Context *context);
      bool validateSamplers(InfoLog *infoLog, const Caps &caps);
  
      bool usesShaderProgram(ShaderProgramID program) const
      {
          return mState.usesShaderProgram(program);
      }
  
      bool hasAnyDirtyBit() const { return mDirtyBits.any(); }
  
      GLboolean isValid() const { return mState.isValid(); }
  
      // Program pipeline dirty bits.
      enum DirtyBitType
      {
          // One of the program stages in the PPO changed.
          DIRTY_BIT_PROGRAM_STAGE,
          DIRTY_BIT_DRAW_DISPATCH_CHANGE,
  
          DIRTY_BIT_COUNT = DIRTY_BIT_DRAW_DISPATCH_CHANGE + 1,
      };
  
      using DirtyBits = angle::BitSet<DIRTY_BIT_COUNT>;
  
      angle::Result syncState(const Context *context);
      void setDirtyBit(DirtyBitType dirtyBitType) { mDirtyBits.set(dirtyBitType); }
  
      // ObserverInterface implementation.
      void onSubjectStateChange(angle::SubjectIndex index, angle::SubjectMessage message) override;
  
      void fillProgramStateMap(gl::ShaderMap<const gl::ProgramState *> *programStatesOut);
  
    private:
      void updateLinkedShaderStages();
      void updateExecutableAttributes();
      void updateTransformFeedbackMembers();
      void updateHasBooleans();
      void updateExecutable();
  
      std::unique_ptr<rx::ProgramPipelineImpl> mProgramPipelineImpl;
  
      ProgramPipelineState mState;
  
      DirtyBits mDirtyBits;
  
      std::vector<angle::ObserverBinding> mProgramObserverBindings;
      angle::ObserverBinding mExecutableObserverBinding;
  };
  }  // namespace gl
  
  #endif  // LIBANGLE_PROGRAMPIPELINE_H_
  

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