kc3-lang/angle/src/compiler/translator/OutputVulkanGLSL.h

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• Hash : f1f082e1
  Author :
  Date : 2020-01-17T14:53:38
  

  Vulkan: Set varying location & xfb decorations in SPIR-V
  
  The shader translator outputs arbitrary location indices.  Once compiled
  by glslang, the SPIR-V transformer modifies these decorations.  If the
  transform feedback extension is used, it will also add the relevant
  decorations to the varyings that are captured.
  
  Bug: angleproject:3394
  Change-Id: I5ecafd0536408612a5d4b920dbabbfabe650657c
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2008468
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/OutputVulkanGLSL.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.
  //
  // OutputVulkanGLSL:
  //   Code that outputs shaders that fit GL_KHR_vulkan_glsl.
  //   The shaders are then fed into glslang to spit out SPIR-V (libANGLE-side).
  //   See: https://www.khronos.org/registry/vulkan/specs/misc/GL_KHR_vulkan_glsl.txt
  //
  
  #include "compiler/translator/OutputGLSL.h"
  
  namespace sh
  {
  
  class TOutputVulkanGLSL : public TOutputGLSL
  {
    public:
      TOutputVulkanGLSL(TInfoSinkBase &objSink,
                        ShArrayIndexClampingStrategy clampingStrategy,
                        ShHashFunction64 hashFunction,
                        NameMap &nameMap,
                        TSymbolTable *symbolTable,
                        sh::GLenum shaderType,
                        int shaderVersion,
                        ShShaderOutput output,
                        ShCompileOptions compileOptions);
  
      void writeStructType(const TStructure *structure);
  
      uint32_t nextUnusedBinding() { return mNextUnusedBinding++; }
      uint32_t nextUnusedInputLocation(uint32_t consumedCount)
      {
          uint32_t nextUnused = mNextUnusedInputLocation;
          mNextUnusedInputLocation += consumedCount;
          return nextUnused;
      }
      uint32_t nextUnusedOutputLocation(uint32_t consumedCount)
      {
          uint32_t nextUnused = mNextUnusedOutputLocation;
          mNextUnusedOutputLocation += consumedCount;
          return nextUnused;
      }
  
    protected:
      void writeLayoutQualifier(TIntermTyped *variable) override;
      void writeVariableType(const TType &type,
                             const TSymbol *symbol,
                             bool isFunctionArgument) override;
  
      // Every resource that requires set & binding layout qualifiers is assigned set 0 and an
      // arbitrary binding when outputting GLSL.  Every input/output that requires a location
      // layout qualifiers is assigned an arbitrary location as well.
      //
      // Glslang wrapper modifies set, binding and location decorations in SPIR-V directly.
      uint32_t mNextUnusedBinding;
      uint32_t mNextUnusedInputLocation;
      uint32_t mNextUnusedOutputLocation;
  };
  
  }  // namespace sh
  

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