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

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• Hash : 776c6015
  Author :
  Date : 2021-02-26T00:00:57
  

  Vulkan: Call glslang at compile time
  
  With this change, the ANGLE translator immediately compiles the
  generated GLSL into SPIR-V with glslang and discards the source.  This
  is in preparation for generating SPIR-V directly, by making the frontend
  and backend already able to digest it.
  
  This change also allows the expensive glslang calls to be parallelized,
  improving the following perf test by about 20%:
  
      LinkProgramBenchmark.Run/vulkan_compile_and_link_multi_thread
  
  Previously, the test was run as such in the Vulkan backend:
  
      Main           Thread 1          Thread 2
      Compile1 --->
      Compile2 --------------------->
                    Translator        Translator
               <---
               <---------------------
      Link
  
      glslang
       for
        shader1
  
      glslang
       for
        shader2
  
      Done
  
  With this change, it is run as such:
  
      Main           Thread 1          Thread 2
      Compile1 --->
      Compile2 --------------------->
                    Translator        Translator
                     glslang           glslang
               <---
               <---------------------
      Link
      Done
  
  glslang_wrapper_utils no longer interacts with glslang! A rename will
  follow.
  
  Bug: angleproject:4889
  Change-Id: If4303e8ba0ba43b1a2f47f8c0a9133d0bee1a19a
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2721195
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Tim Van Patten <timvp@google.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/vulkan/GlslangWrapperVk.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.
  //
  // GlslangWrapperVk: Wrapper for Vulkan's glslang compiler.
  //
  
  #include "libANGLE/renderer/vulkan/GlslangWrapperVk.h"
  
  #include "libANGLE/renderer/vulkan/ContextVk.h"
  #include "libANGLE/renderer/vulkan/vk_cache_utils.h"
  
  namespace rx
  {
  // static
  GlslangSourceOptions GlslangWrapperVk::CreateSourceOptions(const angle::FeaturesVk &features)
  {
      GlslangSourceOptions options;
  
      options.supportsTransformFeedbackExtension =
          features.supportsTransformFeedbackExtension.enabled;
      options.supportsTransformFeedbackEmulation = features.emulateTransformFeedback.enabled;
      options.enableTransformFeedbackEmulation   = options.supportsTransformFeedbackEmulation;
      options.emulateBresenhamLines              = features.basicGLLineRasterization.enabled;
  
      return options;
  }
  
  // static
  void GlslangWrapperVk::ResetGlslangProgramInterfaceInfo(
      GlslangProgramInterfaceInfo *glslangProgramInterfaceInfo)
  {
      glslangProgramInterfaceInfo->uniformsAndXfbDescriptorSetIndex =
          ToUnderlying(DescriptorSetIndex::UniformsAndXfb);
      glslangProgramInterfaceInfo->currentUniformBindingIndex = 0;
      glslangProgramInterfaceInfo->textureDescriptorSetIndex =
          ToUnderlying(DescriptorSetIndex::Texture);
      glslangProgramInterfaceInfo->currentTextureBindingIndex = 0;
      glslangProgramInterfaceInfo->shaderResourceDescriptorSetIndex =
          ToUnderlying(DescriptorSetIndex::ShaderResource);
      glslangProgramInterfaceInfo->currentShaderResourceBindingIndex = 0;
      glslangProgramInterfaceInfo->driverUniformsDescriptorSetIndex =
          ToUnderlying(DescriptorSetIndex::Internal);
  
      glslangProgramInterfaceInfo->locationsUsedForXfbExtension = 0;
  }
  
  // static
  void GlslangWrapperVk::GetShaderCode(const angle::FeaturesVk &features,
                                       const gl::ProgramState &programState,
                                       const gl::ProgramLinkedResources &resources,
                                       GlslangProgramInterfaceInfo *programInterfaceInfo,
                                       gl::ShaderMap<const angle::spirv::Blob *> *spirvBlobsOut,
                                       ShaderInterfaceVariableInfoMap *variableInfoMapOut)
  {
      GlslangSourceOptions options = CreateSourceOptions(features);
      GlslangGetShaderSpirvCode(options, programState, resources, programInterfaceInfo, spirvBlobsOut,
                                variableInfoMapOut);
  }
  
  // static
  angle::Result GlslangWrapperVk::TransformSpirV(
      const GlslangSpirvOptions &options,
      const ShaderInterfaceVariableInfoMap &variableInfoMap,
      const angle::spirv::Blob &initialSpirvBlob,
      angle::spirv::Blob *shaderCodeOut)
  {
      return GlslangTransformSpirvCode(options, variableInfoMap, initialSpirvBlob, shaderCodeOut);
  }
  }  // namespace rx
  

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