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