kc3-lang/angle/src/libANGLE/renderer/glslang_wrapper_utils.h

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• Hash : a48f95ab
  Author :
  Date : 2019-10-14T14:49:49
  

  Move Vulkan GlslangWrapper code to a shared location.
  
  Metal backend will reuse Vulkan's GlslangWrapper code.
  The Metal backend will use this code to translate glsl to spirv then
  cross compile to Metal Shading Language using spirv-cross.
  So the source code of GlslangWrapper should be moved outside vulkan folder.
  
  Bug: angleproject:2634
  Change-Id: I208062daf0d77756c9d32cfdab925b7dfdf83e05
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1858042
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/glslang_wrapper_utils.h

• //
  // Copyright 2019 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.
  //
  // Wrapper for Khronos glslang compiler. This file is used by Vulkan and Metal backends.
  //
  
  #ifndef LIBANGLE_RENDERER_GLSLANG_WRAPPER_UTILS_H_
  #define LIBANGLE_RENDERER_GLSLANG_WRAPPER_UTILS_H_
  
  #include <functional>
  
  #include "libANGLE/renderer/ProgramImpl.h"
  
  namespace rx
  {
  enum class GlslangError
  {
      InvalidShader,
  };
  
  struct GlslangSourceOptions
  {
      // Uniforms set index:
      uint32_t uniformsAndXfbDescriptorSetIndex = 0;
      // Textures set index:
      uint32_t textureDescriptorSetIndex = 1;
      // Other shader resources set index:
      uint32_t shaderResourceDescriptorSetIndex = 2;
      // ANGLE driver uniforms set index:
      uint32_t driverUniformsDescriptorSetIndex = 3;
  
      // Binding index start for transform feedback buffers:
      uint32_t xfbBindingIndexStart = 16;
  };
  
  using GlslangErrorCallback = std::function<angle::Result(GlslangError)>;
  
  void GlslangInitialize();
  void GlslangRelease();
  
  // Get the mapped sampler name after the soure is transformed by GlslangGetShaderSource()
  std::string GlslangGetMappedSamplerName(const std::string &originalName);
  
  // Transform the source to include actual binding points for various shader
  // resources (textures, buffers, xfb, etc)
  void GlslangGetShaderSource(const GlslangSourceOptions &options,
                              bool useOldRewriteStructSamplers,
                              const gl::ProgramState &programState,
                              const gl::ProgramLinkedResources &resources,
                              gl::ShaderMap<std::string> *shaderSourcesOut);
  
  angle::Result GlslangGetShaderSpirvCode(GlslangErrorCallback callback,
                                          const gl::Caps &glCaps,
                                          bool enableLineRasterEmulation,
                                          const gl::ShaderMap<std::string> &shaderSources,
                                          gl::ShaderMap<std::vector<uint32_t>> *shaderCodesOut);
  
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_GLSLANG_WRAPPER_UTILS_H_
  

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