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 // ReplaceForShaderFramebufferFetch.h: Find any references to gl_LastFragData, and replace it with 7 // ANGLELastFragData. 8 // 9 10 #ifndef COMPILER_TRANSLATOR_TREEUTIL_REPLACEFORSHADERFRAMEBUFFERFETCH_H_ 11 #define COMPILER_TRANSLATOR_TREEUTIL_REPLACEFORSHADERFRAMEBUFFERFETCH_H_ 12 13 #include "common/angleutils.h" 14 15 namespace sh 16 { 17 18 class TCompiler; 19 class TIntermBlock; 20 class TSymbolTable; 21 struct ShaderVariable; 22 23 // Declare the global variable, "ANGLELastFragData", and at the begining of the main function, 24 // assign a subpassLoad value to it. Then replace every gl_LastFragData to "ANGLELastFragData". This 25 // is to solve the problem GLSL for Vulkan can't process gl_LastFragData variable. 26 ANGLE_NO_DISCARD bool ReplaceLastFragData(TCompiler *compiler, 27 TIntermBlock *root, 28 TSymbolTable *symbolTable, 29 std::vector<ShaderVariable> *uniforms); 30 31 // Similar to "ANGLELastFragData", but the difference is the variable for loading a framebuffer 32 // data. The variable decorated with a inout qualifier will be replaced to the variable decorated 33 // with a out qualifier. And this variable will be used to load the framebuffer data. 34 ANGLE_NO_DISCARD bool ReplaceInOutVariables(TCompiler *compiler, 35 TIntermBlock *root, 36 TSymbolTable *symbolTable, 37 std::vector<ShaderVariable> *uniforms); 38 39 } // namespace sh 40 41 #endif // COMPILER_TRANSLATOR_TREEUTIL_REPLACEFORSHADERFRAMEBUFFERFETCH_H_ 42