ASTMetadataHLSL.h (1841B)
1 // 2 // Copyright 2002 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 7 // Defines analyses of the AST needed for HLSL generation 8 9 #ifndef COMPILER_TRANSLATOR_ASTMETADATAHLSL_H_ 10 #define COMPILER_TRANSLATOR_ASTMETADATAHLSL_H_ 11 12 #include <set> 13 #include <vector> 14 15 namespace sh 16 { 17 18 class CallDAG; 19 class TIntermNode; 20 class TIntermIfElse; 21 class TIntermLoop; 22 23 struct ASTMetadataHLSL 24 { 25 ASTMetadataHLSL() 26 : mUsesGradient(false), 27 mCalledInDiscontinuousLoop(false), 28 mHasGradientLoopInCallGraph(false), 29 mNeedsLod0(false) 30 {} 31 32 // Here "something uses a gradient" means here that it either contains a 33 // gradient operation, or a call to a function that uses a gradient. 34 bool hasGradientInCallGraph(TIntermLoop *node); 35 bool hasGradientLoop(TIntermIfElse *node); 36 37 // Does the function use a gradient. 38 bool mUsesGradient; 39 40 // Even if usesGradient is true, some control flow might not use a gradient 41 // so we store the set of all gradient-using control flows. 42 std::set<TIntermNode *> mControlFlowsContainingGradient; 43 44 // Remember information about the discontinuous loops and which functions 45 // are called in such loops. 46 bool mCalledInDiscontinuousLoop; 47 bool mHasGradientLoopInCallGraph; 48 std::set<TIntermLoop *> mDiscontinuousLoops; 49 std::set<TIntermIfElse *> mIfsContainingGradientLoop; 50 51 // Will we need to generate a Lod0 version of the function. 52 bool mNeedsLod0; 53 }; 54 55 typedef std::vector<ASTMetadataHLSL> MetadataList; 56 57 // Return the AST analysis result, in the order defined by the call DAG 58 MetadataList CreateASTMetadataHLSL(TIntermNode *root, const CallDAG &callDag); 59 60 } // namespace sh 61 62 #endif // COMPILER_TRANSLATOR_ASTMETADATAHLSL_H_