kc3-lang/angle/src/libANGLE/renderer/vulkan/ShaderVk.cpp

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• Hash : e7ce481f
  Author :
  Date : 2023-11-01T22:44:22
  

  Consolidate parallel compilation in front-end
  
  This cleans up the multiple compilation task implementations in the
  backends and consolidates them in the front-end.  The front-end is then
  able to do the compilation in an unlocked tail call instead if
  desired (in a future change).
  
  This change is in preparation for having the program link tasks directly
  wait on the shader compilation tasks.  As a result, the "shader resolve"
  should not be needed to access the shader compilation results; it should
  be enough to wait for the compilation job.  This change therefore moves
  post-processing of results to the compilation job itself as they did not
  need to actually be done after compilation is done (merely after
  translation is done).  As a side effect, shader substition and other
  debug features should now work for the GL backend as they are now done
  before back-end compilation.
  
  Bug: angleproject:8297
  Change-Id: Ib9274b1149fadca7545956a864d6635b6cba5c3a
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4994655
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Charlie Lao <cclao@google.com>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/libANGLE/renderer/vulkan/ShaderVk.cpp

• //
  // Copyright 2016 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.
  //
  // ShaderVk.cpp:
  //    Implements the class methods for ShaderVk.
  //
  
  #include "libANGLE/renderer/vulkan/ShaderVk.h"
  
  #include "common/debug.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/Display.h"
  #include "libANGLE/renderer/vulkan/ContextVk.h"
  
  namespace rx
  {
  ShaderVk::ShaderVk(const gl::ShaderState &state) : ShaderImpl(state) {}
  
  ShaderVk::~ShaderVk() {}
  
  std::shared_ptr<ShaderTranslateTask> ShaderVk::compile(const gl::Context *context,
                                                         ShCompileOptions *options)
  {
      ContextVk *contextVk = vk::GetImpl(context);
  
      if (context->isWebGL())
      {
          // Only WebGL requires initialization of local variables, others don't.
          // Extra initialization in spirv shader may affect performance.
          options->initializeUninitializedLocals = true;
  
          // WebGL shaders may contain OOB array accesses which in turn cause undefined behavior,
          // which may result in security issues. See https://crbug.com/1189110.
          options->clampIndirectArrayBounds = true;
  
          if (mState.getShaderType() != gl::ShaderType::Compute)
          {
              options->initOutputVariables = true;
          }
      }
  
      if (contextVk->getFeatures().retainSPIRVDebugInfo.enabled)
      {
          options->outputDebugInfo = true;
      }
  
      // robustBufferAccess on Vulkan doesn't support bound check on shader local variables
      // but the GL_EXT_robustness does support.
      // Enable the flag clampIndirectArrayBounds to ensure out of bounds local variable writes in
      // shaders are protected when the context has GL_EXT_robustness enabled
      if (contextVk->getShareGroup()->hasAnyContextWithRobustness())
      {
          options->clampIndirectArrayBounds = true;
      }
  
      if (contextVk->getFeatures().clampPointSize.enabled)
      {
          options->clampPointSize = true;
      }
  
      if (contextVk->getFeatures().emulateAdvancedBlendEquations.enabled)
      {
          options->addAdvancedBlendEquationsEmulation = true;
      }
  
      if (contextVk->emulateSeamfulCubeMapSampling())
      {
          options->emulateSeamfulCubeMapSampling = true;
      }
  
      if (!contextVk->getFeatures().enablePrecisionQualifiers.enabled)
      {
          options->ignorePrecisionQualifiers = true;
      }
  
      if (contextVk->getFeatures().forceFragmentShaderPrecisionHighpToMediump.enabled)
      {
          options->forceShaderPrecisionHighpToMediump = true;
      }
  
      // Let compiler use specialized constant for pre-rotation.
      if (!contextVk->getFeatures().preferDriverUniformOverSpecConst.enabled)
      {
          options->useSpecializationConstant = true;
      }
  
      if (contextVk->getFeatures().clampFragDepth.enabled)
      {
          options->clampFragDepth = true;
      }
  
      if (!contextVk->getFeatures().supportsDepthClipControl.enabled)
      {
          options->addVulkanDepthCorrection = true;
      }
  
      if (contextVk->getFeatures().supportsTransformFeedbackExtension.enabled)
      {
          options->addVulkanXfbExtensionSupportCode = true;
      }
      else if (mState.getShaderType() == gl::ShaderType::Vertex &&
               contextVk->getFeatures().emulateTransformFeedback.enabled)
      {
          options->addVulkanXfbEmulationSupportCode = true;
      }
  
      if (contextVk->getFeatures().roundOutputAfterDithering.enabled)
      {
          options->roundOutputAfterDithering = true;
      }
  
      if (contextVk->getFeatures().appendAliasedMemoryDecorations.enabled)
      {
          options->aliasedUnlessRestrict = true;
      }
  
      if (contextVk->getFeatures().explicitlyCastMediumpFloatTo16Bit.enabled)
      {
          options->castMediumpFloatTo16Bit = true;
      }
  
      if (contextVk->getExtensions().shaderPixelLocalStorageANGLE)
      {
          options->pls = contextVk->getNativePixelLocalStorageOptions();
      }
  
      // The Vulkan backend needs no post-processing of the translated shader.
      return std::shared_ptr<ShaderTranslateTask>(new ShaderTranslateTask);
  }
  
  std::string ShaderVk::getDebugInfo() const
  {
      return mState.getCompiledState()->compiledBinary.empty() ? "" : "<binary blob>";
  }
  
  }  // namespace rx
  

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