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

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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.h

• //
  // 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.
  //
  
  #ifndef LIBANGLE_RENDERER_VULKAN_GLSLANG_WRAPPER_H_
  #define LIBANGLE_RENDERER_VULKAN_GLSLANG_WRAPPER_H_
  
  #include "libANGLE/renderer/ProgramImpl.h"
  #include "libANGLE/renderer/glslang_wrapper_utils.h"
  #include "libANGLE/renderer/vulkan/vk_utils.h"
  
  namespace angle
  {
  struct FeaturesVk;
  }  // namespace angle
  
  namespace rx
  {
  // This class currently holds no state. If we want to hold state we would need to solve the
  // potential race conditions with multiple threads.
  class GlslangWrapperVk
  {
    public:
      static GlslangSourceOptions CreateSourceOptions(const angle::FeaturesVk &features);
  
      static void ResetGlslangProgramInterfaceInfo(
          GlslangProgramInterfaceInfo *glslangProgramInterfaceInfo);
  
      static void GetShaderCode(const angle::FeaturesVk &features,
                                const gl::ProgramState &programState,
                                const gl::ProgramLinkedResources &resources,
                                GlslangProgramInterfaceInfo *programInterfaceInfo,
                                gl::ShaderMap<const angle::spirv::Blob *> *spirvBlobsOut,
                                ShaderInterfaceVariableInfoMap *variableInfoMapOut);
  
      static angle::Result TransformSpirV(const GlslangSpirvOptions &options,
                                          const ShaderInterfaceVariableInfoMap &variableInfoMap,
                                          const angle::spirv::Blob &initialSpirvBlob,
                                          angle::spirv::Blob *shaderCodeOut);
  };
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_VULKAN_GLSLANG_WRAPPER_H_
  

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