1 // 2 // Copyright 2020 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 // ReplaceClipCullDistanceVariable.h: Find any references to gl_ClipDistance or gl_CullDistance and 7 // replace it with ANGLEClipDistance or ANGLECullDistance. 8 // 9 10 #ifndef COMPILER_TRANSLATOR_TREEUTIL_REPLACECLIPCULLDISTANCEVARIABLE_H_ 11 #define COMPILER_TRANSLATOR_TREEUTIL_REPLACECLIPCULLDISTANCEVARIABLE_H_ 12 13 #include "GLSLANG/ShaderLang.h" 14 #include "common/angleutils.h" 15 16 namespace sh 17 { 18 19 struct InterfaceBlock; 20 class TCompiler; 21 class TIntermBlock; 22 class TSymbolTable; 23 class TIntermTyped; 24 25 // Replace every gl_ClipDistance assignment with assignment to "ANGLEClipDistance", 26 // then at the end of shader re-assign the values of this global variable to gl_ClipDistance. 27 // This to solve some complex usages such as user passing gl_ClipDistance as output reference 28 // to a function. 29 // Furthermore, at the end shader, some disabled gl_ClipDistance[i] can be skipped from the 30 // assignment. 31 [[nodiscard]] bool ReplaceClipDistanceAssignments(TCompiler *compiler, 32 TIntermBlock *root, 33 TSymbolTable *symbolTable, 34 const GLenum shaderType, 35 const TIntermTyped *clipDistanceEnableFlags); 36 37 [[nodiscard]] bool ReplaceCullDistanceAssignments(TCompiler *compiler, 38 TIntermBlock *root, 39 TSymbolTable *symbolTable, 40 const GLenum shaderType); 41 42 [[nodiscard]] bool ZeroDisabledClipDistanceAssignments(TCompiler *compiler, 43 TIntermBlock *root, 44 TSymbolTable *symbolTable, 45 const GLenum shaderType, 46 const TIntermTyped *clipDistanceEnableFlags); 47 } // namespace sh 48 49 #endif 50