kc3-lang/angle/src/compiler/translator/tree_ops/vulkan/ReplaceForShaderFramebufferFetch.h

• Show log

  Commit

• Hash : b96d1955
  Author :
  Date : 2023-01-20T16:06:34
  

  Implement GL_ARM_shader_framebuffer_fetch
  
  GL_ARM_shader_framebuffer_fetch allows fragment shaders to read
  gl_LastFragColorARM. The extension is similar to
  GL_EXT_shader_framebuffer_fetch, but is more limited in its
  capabilities.
  
  GL_ARM_shader_framebuffer_fetch was removed from HasFramebufferFetch()
  because it acts differently from GL_EXT_shader_framebuffer_fetch in
  significant enough ways that it should not be included in that
  single-use function.
  
  Tests: FramebufferFetchES31.*_ARM
  Bug: b/242419750
  Bug: angleproject:7882
  Change-Id: Id3a25c8ee50ca3e2a4c30a2261f507b0b53511ec
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4083108
  Commit-Queue: Sean Risser <srisser@google.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Cody Northrop <cnorthrop@google.com>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

Download

• src/compiler/translator/tree_ops/vulkan/ReplaceForShaderFramebufferFetch.h

• //
  // Copyright 2020 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.
  //
  // ReplaceForShaderFramebufferFetch.h: Find any references to gl_LastFragData, and replace it with
  // ANGLELastFragData.
  //
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_VULKAN_REPLACEFORSHADERFRAMEBUFFERFETCH_H_
  #define COMPILER_TRANSLATOR_TREEOPS_VULKAN_REPLACEFORSHADERFRAMEBUFFERFETCH_H_
  
  #include "common/angleutils.h"
  
  namespace sh
  {
  
  class TCompiler;
  class TIntermBlock;
  class TSymbolTable;
  struct ShaderVariable;
  
  enum class FramebufferFetchReplaceTarget
  {
      LastFragData,
      LastFragColor,
  };
  
  // Declare the global variable, "ANGLELastFragData", and at the begining of the main function,
  // assign a subpassLoad value to it. Then replace every gl_LastFragData/Color to
  // "ANGLELastFragData". This is to solve the problem GLSL for Vulkan can't process
  // gl_LastFragData/Color variable.
  [[nodiscard]] bool ReplaceLastFrag(TCompiler *compiler,
                                     TIntermBlock *root,
                                     TSymbolTable *symbolTable,
                                     std::vector<ShaderVariable> *uniforms,
                                     FramebufferFetchReplaceTarget target);
  
  // Similar to "ANGLELastFragData", but the difference is the variable for loading a framebuffer
  // data. The variable decorated with a inout qualifier will be replaced to the variable decorated
  // with a out qualifier. And this variable will be used to load the framebuffer data.
  [[nodiscard]] bool ReplaceInOutVariables(TCompiler *compiler,
                                           TIntermBlock *root,
                                           TSymbolTable *symbolTable,
                                           std::vector<ShaderVariable> *uniforms);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_VULKAN_REPLACEFORSHADERFRAMEBUFFERFETCH_H_
  

Download