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

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• Hash : 4d7a3993
  Author :
  Date : 2020-05-27T14:08:20
  

  Vulkan: Rotate gl_PointCoord for Android pre-rotation
  
  This extends the current y-flip that's done for gl_PointCoord.
  Now, gl_PointCoord is rotated and then flips both the x and y-axis
  (similar to  gl_FragCoord).  The tests used to reproduce the
  problem and the fix are:
  
  angle_deqp_gles2_tests --local-output --gtest_filter=dEQP.GLES2/functional_shaders_builtin_variable_pointcoord* --use-angle=vulkan
  
  angle_end2end_tests --local-output --gtest_filter=*GLSLTest.PointCoordConsistency*Vulkan*
  
  Bug: b/157476696
  Change-Id: Iada8680eda8322f7382ff242e4a9422a66114f07
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2216700
  Commit-Queue: Ian Elliott <ianelliott@google.com>
  Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/TranslatorVulkan.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.
  //
  // TranslatorVulkan:
  //   A GLSL-based translator 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
  //
  
  #ifndef COMPILER_TRANSLATOR_TRANSLATORVULKAN_H_
  #define COMPILER_TRANSLATOR_TRANSLATORVULKAN_H_
  
  #include "compiler/translator/Compiler.h"
  
  namespace sh
  {
  
  class TOutputVulkanGLSL;
  
  class TranslatorVulkan : public TCompiler
  {
    public:
      TranslatorVulkan(sh::GLenum type, ShShaderSpec spec);
  
    protected:
      ANGLE_NO_DISCARD bool translate(TIntermBlock *root,
                                      ShCompileOptions compileOptions,
                                      PerformanceDiagnostics *perfDiagnostics) override;
      bool shouldFlattenPragmaStdglInvariantAll() override;
  
      TIntermSwizzle *getDriverUniformNegFlipYRef(const TVariable *driverUniforms) const;
      TIntermBinary *getDriverUniformDepthRangeReservedFieldRef(
          const TVariable *driverUniforms) const;
      // Subclass can call this method to transform the AST before writing the final output.
      // See TranslatorMetal.cpp.
      ANGLE_NO_DISCARD bool translateImpl(TIntermBlock *root,
                                          ShCompileOptions compileOptions,
                                          PerformanceDiagnostics *perfDiagnostics,
                                          const TVariable **driverUniformsOut,
                                          TOutputVulkanGLSL *outputGLSL);
  
      // Give subclass such as TranslatorMetal a chance to do depth transform before
      // TranslatorVulkan apply its own transform.
      ANGLE_NO_DISCARD virtual bool transformDepthBeforeCorrection(TIntermBlock *root,
                                                                   const TVariable *driverUniforms)
      {
          return true;
      }
  };
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TRANSLATORVULKAN_H_
  

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