1 /* 2 * Copyright (C) 2012 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef THIRD_PARTY_COMPILER_ARRAY_BOUNDS_CLAMPER_H_ 27 #define THIRD_PARTY_COMPILER_ARRAY_BOUNDS_CLAMPER_H_ 28 29 #include "GLSLANG/ShaderLang.h" 30 31 #include "compiler/InfoSink.h" 32 #include "compiler/intermediate.h" 33 34 class ArrayBoundsClamper { 35 public: 36 ArrayBoundsClamper(); 37 38 // Must be set before compiling any shaders to ensure consistency 39 // between the translated shaders and any necessary prequel. 40 void SetClampingStrategy(ShArrayIndexClampingStrategy clampingStrategy); 41 42 // Marks nodes in the tree that index arrays indirectly as 43 // requiring clamping. 44 void MarkIndirectArrayBoundsForClamping(TIntermNode* root); 45 46 // If necessary, output array clamp function source into the shader source. 47 void OutputClampingFunctionDefinition(TInfoSinkBase& out) const; 48 Cleanup()49 void Cleanup() 50 { 51 mArrayBoundsClampDefinitionNeeded = false; 52 } 53 54 private: GetArrayBoundsClampDefinitionNeeded()55 bool GetArrayBoundsClampDefinitionNeeded() const { return mArrayBoundsClampDefinitionNeeded; } SetArrayBoundsClampDefinitionNeeded()56 void SetArrayBoundsClampDefinitionNeeded() { mArrayBoundsClampDefinitionNeeded = true; } 57 58 ShArrayIndexClampingStrategy mClampingStrategy; 59 bool mArrayBoundsClampDefinitionNeeded; 60 }; 61 62 #endif // THIRD_PARTY_COMPILER_ARRAY_BOUNDS_CLAMPER_H_ 63