kc3-lang/angle/src/compiler/translator/tree_util/ReplaceClipCullDistanceVariable.h

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• Hash : ac5a9c53
  Author :
  Date : 2022-10-26T00:00:00
  

  Metal: Optimize ReplaceClipCullDistanceVariable
  
  The intermediate ANGLEClipDistance variable is
  not needed when generating MSL output directly.
  
  Bug: angleproject:6291
  Change-Id: Ie3d32a903645be002f21c44a6233f9cd0155605a
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3981716
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>
  Reviewed-by: Kyle Piddington <kpiddington@apple.com>
  

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• src/compiler/translator/tree_util/ReplaceClipCullDistanceVariable.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.
  //
  // ReplaceClipCullDistanceVariable.h: Find any references to gl_ClipDistance or gl_CullDistance and
  // replace it with ANGLEClipDistance or ANGLECullDistance.
  //
  
  #ifndef COMPILER_TRANSLATOR_TREEUTIL_REPLACECLIPCULLDISTANCEVARIABLE_H_
  #define COMPILER_TRANSLATOR_TREEUTIL_REPLACECLIPCULLDISTANCEVARIABLE_H_
  
  #include "GLSLANG/ShaderLang.h"
  #include "common/angleutils.h"
  
  namespace sh
  {
  
  struct InterfaceBlock;
  class TCompiler;
  class TIntermBlock;
  class TSymbolTable;
  class TIntermTyped;
  
  // Replace every gl_ClipDistance assignment with assignment to "ANGLEClipDistance",
  // then at the end of shader re-assign the values of this global variable to gl_ClipDistance.
  // This to solve some complex usages such as user passing gl_ClipDistance as output reference
  // to a function.
  // Furthermore, at the end shader, some disabled gl_ClipDistance[i] can be skipped from the
  // assignment.
  [[nodiscard]] bool ReplaceClipDistanceAssignments(TCompiler *compiler,
                                                    TIntermBlock *root,
                                                    TSymbolTable *symbolTable,
                                                    const GLenum shaderType,
                                                    const TIntermTyped *clipDistanceEnableFlags);
  
  [[nodiscard]] bool ReplaceCullDistanceAssignments(TCompiler *compiler,
                                                    TIntermBlock *root,
                                                    TSymbolTable *symbolTable,
                                                    const GLenum shaderType);
  
  [[nodiscard]] bool ZeroDisabledClipDistanceAssignments(TCompiler *compiler,
                                                         TIntermBlock *root,
                                                         TSymbolTable *symbolTable,
                                                         const GLenum shaderType,
                                                         const TIntermTyped *clipDistanceEnableFlags);
  }  // namespace sh
  
  #endif
  

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