kc3-lang/angle/src/compiler/translator/ExtensionGLSL.cpp

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• Hash : 861149c7
  Author :
  Date : 2022-08-03T15:43:29
  

  Make PLS coherent on desktop OpenGL
  
  Implements ANGLE_shader_pixel_local_storage_coherent using fragment
  shader synchronization extensions:
  
    NV_fragment_shader_interlock
    INTEL_fragment_shader_ordering
    ARB_fragment_shader_interlock
  
  With these extensions combined, we get coherency all 3 big desktop
  vendors: NVIDIA, Intel, and AMD.
  
  Bug: angleproject:7279
  Change-Id: Ie20b251fb772898e89994b799640f1f2806581eb
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3773990
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• src/compiler/translator/ExtensionGLSL.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.
  //
  // ExtensionGLSL.cpp: Implements the TExtensionGLSL class that tracks GLSL extension requirements
  // of shaders.
  
  #include "compiler/translator/ExtensionGLSL.h"
  
  #include "compiler/translator/VersionGLSL.h"
  
  namespace sh
  {
  
  TExtensionGLSL::TExtensionGLSL(ShShaderOutput output)
      : TIntermTraverser(true, false, false), mTargetVersion(ShaderOutputTypeToGLSLVersion(output))
  {}
  
  const std::set<std::string> &TExtensionGLSL::getEnabledExtensions() const
  {
      return mEnabledExtensions;
  }
  
  const std::set<std::string> &TExtensionGLSL::getRequiredExtensions() const
  {
      return mRequiredExtensions;
  }
  
  bool TExtensionGLSL::visitUnary(Visit, TIntermUnary *node)
  {
      checkOperator(node);
  
      return true;
  }
  
  bool TExtensionGLSL::visitAggregate(Visit, TIntermAggregate *node)
  {
      checkOperator(node);
  
      return true;
  }
  
  void TExtensionGLSL::checkOperator(TIntermOperator *node)
  {
      if (mTargetVersion < GLSL_VERSION_130)
      {
          return;
      }
  
      switch (node->getOp())
      {
          case EOpAbs:
              break;
  
          case EOpSign:
              break;
  
          case EOpMix:
              break;
  
          case EOpFloatBitsToInt:
          case EOpFloatBitsToUint:
          case EOpIntBitsToFloat:
          case EOpUintBitsToFloat:
              if (mTargetVersion < GLSL_VERSION_330)
              {
                  // Bit conversion functions cannot be emulated.
                  mRequiredExtensions.insert("GL_ARB_shader_bit_encoding");
              }
              break;
  
          case EOpPackSnorm2x16:
          case EOpPackHalf2x16:
          case EOpUnpackSnorm2x16:
          case EOpUnpackHalf2x16:
              if (mTargetVersion < GLSL_VERSION_420)
              {
                  mEnabledExtensions.insert("GL_ARB_shading_language_packing");
  
                  if (mTargetVersion < GLSL_VERSION_330)
                  {
                      // floatBitsToUint and uintBitsToFloat are needed to emulate
                      // packHalf2x16 and unpackHalf2x16 respectively and cannot be
                      // emulated themselves.
                      mRequiredExtensions.insert("GL_ARB_shader_bit_encoding");
                  }
              }
              break;
  
          case EOpPackUnorm2x16:
          case EOpUnpackUnorm2x16:
              if (mTargetVersion < GLSL_VERSION_410)
              {
                  mEnabledExtensions.insert("GL_ARB_shading_language_packing");
              }
              break;
  
          case EOpBeginInvocationInterlockNV:
          case EOpEndInvocationInterlockNV:
              mRequiredExtensions.insert("GL_NV_fragment_shader_interlock");
              break;
  
          case EOpBeginFragmentShaderOrderingINTEL:
              mRequiredExtensions.insert("GL_INTEL_fragment_shader_ordering");
              break;
  
          case EOpBeginInvocationInterlockARB:
          case EOpEndInvocationInterlockARB:
              mRequiredExtensions.insert("GL_ARB_fragment_shader_interlock");
              break;
  
          default:
              break;
      }
  }
  
  }  // namespace sh
  

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