kc3-lang/angle/src/libANGLE/renderer/gl/ShaderGL.cpp

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• Author : jchen10
  Date : 2018-08-16 15:26:39
  Hash : a155bacf
  Message : ParallelCompile: Parallelize shader translation This changes to construct a new ShHandle of compiler for each Shader, and use it to translate the shader source in a background thread. Bug: chromium:849576 Change-Id: Ib49952c7292321ee6aa1c5996f8f7927f40d8f04 Reviewed-on: https://chromium-review.googlesource.com/1177195 Commit-Queue: Jie A Chen <jie.a.chen@intel.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• src/libANGLE/renderer/gl/ShaderGL.cpp

• //
  // Copyright 2015 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.
  //
  
  // ShaderGL.cpp: Implements the class methods for ShaderGL.
  
  #include "libANGLE/renderer/gl/ShaderGL.h"
  
  #include "common/debug.h"
  #include "libANGLE/Compiler.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/renderer/gl/FunctionsGL.h"
  #include "libANGLE/renderer/gl/RendererGL.h"
  #include "libANGLE/renderer/gl/WorkaroundsGL.h"
  
  #include <iostream>
  
  namespace rx
  {
  
  ShaderGL::ShaderGL(const gl::ShaderState &data,
                     GLuint shaderID,
                     MultiviewImplementationTypeGL multiviewImplementationType,
                     const FunctionsGL *functions)
      : ShaderImpl(data),
        mShaderID(shaderID),
        mMultiviewImplementationType(multiviewImplementationType),
        mFunctions(functions)
  {
  }
  
  ShaderGL::~ShaderGL()
  {
      ASSERT(mShaderID == 0);
  }
  
  void ShaderGL::destroy()
  {
      mFunctions->deleteShader(mShaderID);
      mShaderID = 0;
  }
  
  ShCompileOptions ShaderGL::prepareSourceAndReturnOptions(const gl::Context *context,
                                                           std::stringstream *sourceStream,
                                                           std::string * /*sourcePath*/)
  {
      *sourceStream << mData.getSource();
  
      ShCompileOptions options = SH_INIT_GL_POSITION;
  
      bool isWebGL = context->getExtensions().webglCompatibility;
      if (isWebGL && (mData.getShaderType() != gl::ShaderType::Compute))
      {
          options |= SH_INIT_OUTPUT_VARIABLES;
      }
  
      const WorkaroundsGL &workarounds = GetWorkaroundsGL(context);
  
      if (workarounds.doWhileGLSLCausesGPUHang)
      {
          options |= SH_REWRITE_DO_WHILE_LOOPS;
      }
  
      if (workarounds.emulateAbsIntFunction)
      {
          options |= SH_EMULATE_ABS_INT_FUNCTION;
      }
  
      if (workarounds.addAndTrueToLoopCondition)
      {
          options |= SH_ADD_AND_TRUE_TO_LOOP_CONDITION;
      }
  
      if (workarounds.emulateIsnanFloat)
      {
          options |= SH_EMULATE_ISNAN_FLOAT_FUNCTION;
      }
  
      if (workarounds.emulateAtan2Float)
      {
          options |= SH_EMULATE_ATAN2_FLOAT_FUNCTION;
      }
  
      if (workarounds.useUnusedBlocksWithStandardOrSharedLayout)
      {
          options |= SH_USE_UNUSED_STANDARD_SHARED_BLOCKS;
      }
  
      if (workarounds.dontRemoveInvariantForFragmentInput)
      {
          options |= SH_DONT_REMOVE_INVARIANT_FOR_FRAGMENT_INPUT;
      }
  
      if (workarounds.removeInvariantAndCentroidForESSL3)
      {
          options |= SH_REMOVE_INVARIANT_AND_CENTROID_FOR_ESSL3;
      }
  
      if (workarounds.rewriteFloatUnaryMinusOperator)
      {
          options |= SH_REWRITE_FLOAT_UNARY_MINUS_OPERATOR;
      }
  
      if (!workarounds.dontInitializeUninitializedLocals)
      {
          options |= SH_INITIALIZE_UNINITIALIZED_LOCALS;
      }
  
      if (workarounds.clampPointSize)
      {
          options |= SH_CLAMP_POINT_SIZE;
      }
  
      if (workarounds.rewriteVectorScalarArithmetic)
      {
          options |= SH_REWRITE_VECTOR_SCALAR_ARITHMETIC;
      }
  
      if (workarounds.dontUseLoopsToInitializeVariables)
      {
          options |= SH_DONT_USE_LOOPS_TO_INITIALIZE_VARIABLES;
      }
  
      if (workarounds.clampFragDepth)
      {
          options |= SH_CLAMP_FRAG_DEPTH;
      }
  
      if (workarounds.rewriteRepeatedAssignToSwizzled)
      {
          options |= SH_REWRITE_REPEATED_ASSIGN_TO_SWIZZLED;
      }
  
      if (mMultiviewImplementationType == MultiviewImplementationTypeGL::NV_VIEWPORT_ARRAY2)
      {
          options |= SH_INITIALIZE_BUILTINS_FOR_INSTANCED_MULTIVIEW;
          options |= SH_SELECT_VIEW_IN_NV_GLSL_VERTEX_SHADER;
      }
  
      return options;
  }
  
  bool ShaderGL::postTranslateCompile(gl::ShCompilerInstance *compiler, std::string *infoLog)
  {
      // Translate the ESSL into GLSL
      const char *translatedSourceCString = mData.getTranslatedSource().c_str();
  
      // Set the source
      mFunctions->shaderSource(mShaderID, 1, &translatedSourceCString, nullptr);
      mFunctions->compileShader(mShaderID);
  
      // Check for compile errors from the native driver
      GLint compileStatus = GL_FALSE;
      mFunctions->getShaderiv(mShaderID, GL_COMPILE_STATUS, &compileStatus);
      if (compileStatus == GL_FALSE)
      {
          // Compilation failed, put the error into the info log
          GLint infoLogLength = 0;
          mFunctions->getShaderiv(mShaderID, GL_INFO_LOG_LENGTH, &infoLogLength);
  
          // Info log length includes the null terminator, so 1 means that the info log is an empty
          // string.
          if (infoLogLength > 1)
          {
              std::vector<char> buf(infoLogLength);
              mFunctions->getShaderInfoLog(mShaderID, infoLogLength, nullptr, &buf[0]);
  
              *infoLog = &buf[0];
              WARN() << std::endl << *infoLog;
          }
          else
          {
              WARN() << std::endl << "Shader compilation failed with no info log.";
          }
          return false;
      }
  
      return true;
  }
  
  std::string ShaderGL::getDebugInfo() const
  {
      return mData.getTranslatedSource();
  }
  
  GLuint ShaderGL::getShaderID() const
  {
      return mShaderID;
  }
  
  }