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

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• Hash : 855d964b
  Author :
  Date : 2017-05-17T14:05:06
  

  Prefix user-defined names in GLSL output
  
  Now user-defined names are prefixed by _u in GLSL output in case name
  hashing is not on. Internal names such as names of temporary variables
  created in AST transformations are written out as such.
  
  This makes handling of internal function names and internal variable
  names consistent. It also removes the possibility of name conflicts
  between user-defined names and internal names in case name hashing is
  not on. In the same vein, it makes it safe to use GLSL reserved words
  that are not reserved in ESSL as variable names in case name hashing
  is not on.
  
  This also makes the GLSL output more consistent with how names are
  handled in HLSL output. Name hashing code is shared between
  VariableInfo and OutputGLSLBase to ensure names are handled
  consistently in both. The name that's used in the shader source for a
  given interface variable is written out to ShaderVariable::mappedName.
  
  An exception needs to be made for identifiers close to the length
  limit, since adding any prefix would take them over the limit. But
  they can be just written out as such, since we don't have any builtins
  or ANGLE internal variables that have as long names and could create a
  conflict.
  
  BUG=angleproject:2139
  BUG=angleproject:2038
  TEST=angle_unittests, angle_end2end_tests, WebGL conformance tests
  
  Change-Id: Id6ed052c4fab2d091227dc9a3668083053b67a38
  Reviewed-on: https://chromium-review.googlesource.com/507647
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/Shader.h

• //
  // Copyright (c) 2002-2013 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.
  //
  
  // Shader.h: Defines the abstract gl::Shader class and its concrete derived
  // classes VertexShader and FragmentShader. Implements GL shader objects and
  // related functionality. [OpenGL ES 2.0.24] section 2.10 page 24 and section
  // 3.8 page 84.
  
  #ifndef LIBANGLE_SHADER_H_
  #define LIBANGLE_SHADER_H_
  
  #include <list>
  #include <memory>
  #include <string>
  #include <vector>
  
  #include "angle_gl.h"
  #include <GLSLANG/ShaderLang.h>
  
  #include "common/Optional.h"
  #include "common/angleutils.h"
  #include "libANGLE/Debug.h"
  #include "libANGLE/angletypes.h"
  
  namespace rx
  {
  class GLImplFactory;
  class ShaderImpl;
  class ShaderSh;
  }
  
  namespace gl
  {
  class Compiler;
  class ContextState;
  struct Limitations;
  class ShaderProgramManager;
  class Context;
  
  // We defer the compile until link time, or until properties are queried.
  enum class CompileStatus
  {
      NOT_COMPILED,
      COMPILE_REQUESTED,
      COMPILED,
  };
  
  class ShaderState final : angle::NonCopyable
  {
    public:
      ShaderState(GLenum shaderType);
      ~ShaderState();
  
      const std::string &getLabel() const { return mLabel; }
  
      const std::string &getSource() const { return mSource; }
      const std::string &getTranslatedSource() const { return mTranslatedSource; }
  
      GLenum getShaderType() const { return mShaderType; }
      int getShaderVersion() const { return mShaderVersion; }
  
      const std::vector<sh::Varying> &getVaryings() const { return mVaryings; }
      const std::vector<sh::Uniform> &getUniforms() const { return mUniforms; }
      const std::vector<sh::InterfaceBlock> &getUniformBlocks() const { return mUniformBlocks; }
      const std::vector<sh::InterfaceBlock> &getShaderStorageBlocks() const
      {
          return mShaderStorageBlocks;
      }
      const std::vector<sh::Attribute> &getActiveAttributes() const { return mActiveAttributes; }
      const std::vector<sh::OutputVariable> &getActiveOutputVariables() const
      {
          return mActiveOutputVariables;
      }
  
      bool compilePending() const { return mCompileStatus == CompileStatus::COMPILE_REQUESTED; }
  
    private:
      friend class Shader;
  
      std::string mLabel;
  
      GLenum mShaderType;
      int mShaderVersion;
      std::string mTranslatedSource;
      std::string mSource;
  
      sh::WorkGroupSize mLocalSize;
  
      std::vector<sh::Varying> mVaryings;
      std::vector<sh::Uniform> mUniforms;
      std::vector<sh::InterfaceBlock> mUniformBlocks;
      std::vector<sh::InterfaceBlock> mShaderStorageBlocks;
      std::vector<sh::Attribute> mActiveAttributes;
      std::vector<sh::OutputVariable> mActiveOutputVariables;
  
      // ANGLE_multiview.
      int mNumViews;
  
      // Indicates if this shader has been successfully compiled
      CompileStatus mCompileStatus;
  };
  
  class Shader final : angle::NonCopyable, public LabeledObject
  {
    public:
      Shader(ShaderProgramManager *manager,
             rx::GLImplFactory *implFactory,
             const gl::Limitations &rendererLimitations,
             GLenum type,
             GLuint handle);
  
      void onDestroy(const Context *context);
  
      void setLabel(const std::string &label) override;
      const std::string &getLabel() const override;
  
      GLenum getType() const { return mType; }
      GLuint getHandle() const;
  
      rx::ShaderImpl *getImplementation() const { return mImplementation.get(); }
  
      void setSource(GLsizei count, const char *const *string, const GLint *length);
      int getInfoLogLength(const Context *context);
      void getInfoLog(const Context *context, GLsizei bufSize, GLsizei *length, char *infoLog);
      int getSourceLength() const;
      const std::string &getSourceString() const { return mState.getSource(); }
      void getSource(GLsizei bufSize, GLsizei *length, char *buffer) const;
      int getTranslatedSourceLength(const Context *context);
      int getTranslatedSourceWithDebugInfoLength(const Context *context);
      const std::string &getTranslatedSource(const Context *context);
      void getTranslatedSource(const Context *context,
                               GLsizei bufSize,
                               GLsizei *length,
                               char *buffer);
      void getTranslatedSourceWithDebugInfo(const Context *context,
                                            GLsizei bufSize,
                                            GLsizei *length,
                                            char *buffer);
  
      void compile(const Context *context);
      bool isCompiled(const Context *context);
  
      void addRef();
      void release(const Context *context);
      unsigned int getRefCount() const;
      bool isFlaggedForDeletion() const;
      void flagForDeletion();
  
      int getShaderVersion(const Context *context);
  
      const std::vector<sh::Varying> &getVaryings(const Context *context);
      const std::vector<sh::Uniform> &getUniforms(const Context *context);
      const std::vector<sh::InterfaceBlock> &getUniformBlocks(const Context *context);
      const std::vector<sh::InterfaceBlock> &getShaderStorageBlocks(const Context *context);
      const std::vector<sh::Attribute> &getActiveAttributes(const Context *context);
      const std::vector<sh::OutputVariable> &getActiveOutputVariables(const Context *context);
  
      // Returns mapped name of a transform feedback varying. The original name may contain array
      // brackets with an index inside, which will get copied to the mapped name. The varying must be
      // known to be declared in the shader.
      std::string getTransformFeedbackVaryingMappedName(const std::string &tfVaryingName,
                                                        const Context *context);
  
      const sh::WorkGroupSize &getWorkGroupSize(const Context *context);
  
      int getNumViews(const Context *context);
  
      const std::string &getCompilerResourcesString() const;
  
    private:
      virtual ~Shader();
      static void GetSourceImpl(const std::string &source,
                                GLsizei bufSize,
                                GLsizei *length,
                                char *buffer);
  
      void resolveCompile(const Context *context);
  
      ShaderState mState;
      std::string mLastCompiledSource;
      std::string mLastCompiledSourcePath;
      ShCompileOptions mLastCompileOptions;
      std::unique_ptr<rx::ShaderImpl> mImplementation;
      const gl::Limitations &mRendererLimitations;
      const GLuint mHandle;
      const GLenum mType;
      unsigned int mRefCount;     // Number of program objects this shader is attached to
      bool mDeleteStatus;         // Flag to indicate that the shader can be deleted when no longer in use
      std::string mInfoLog;
  
      // We keep a reference to the translator in order to defer compiles while preserving settings.
      BindingPointer<Compiler> mBoundCompiler;
  
      ShaderProgramManager *mResourceManager;
  };
  
  bool CompareShaderVar(const sh::ShaderVariable &x, const sh::ShaderVariable &y);
  }  // namespace gl
  
  #endif   // LIBANGLE_SHADER_H_
  

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