Line data    Source code

       1             : //
       2             : // Copyright (c) 2002-2015 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           0 : struct ASTMetadataHLSL
      24             : {
      25           0 :     ASTMetadataHLSL()
      26           0 :         : mUsesGradient(false),
      27             :           mCalledInDiscontinuousLoop(false),
      28             :           mHasGradientLoopInCallGraph(false),
      29           0 :           mNeedsLod0(false)
      30             :     {
      31           0 :     }
      32             : 
      33             :     // Here "something uses a gradient" means here that it either contains a
      34             :     // gradient operation, or a call to a function that uses a gradient.
      35             :     bool hasGradientInCallGraph(TIntermLoop *node);
      36             :     bool hasGradientLoop(TIntermIfElse *node);
      37             : 
      38             :     // Does the function use a gradient.
      39             :     bool mUsesGradient;
      40             : 
      41             :     // Even if usesGradient is true, some control flow might not use a gradient
      42             :     // so we store the set of all gradient-using control flows.
      43             :     std::set<TIntermNode*> mControlFlowsContainingGradient;
      44             : 
      45             :     // Remember information about the discontinuous loops and which functions
      46             :     // are called in such loops.
      47             :     bool mCalledInDiscontinuousLoop;
      48             :     bool mHasGradientLoopInCallGraph;
      49             :     std::set<TIntermLoop*> mDiscontinuousLoops;
      50             :     std::set<TIntermIfElse *> mIfsContainingGradientLoop;
      51             : 
      52             :     // Will we need to generate a Lod0 version of the function.
      53             :     bool mNeedsLod0;
      54             : };
      55             : 
      56             : typedef std::vector<ASTMetadataHLSL> MetadataList;
      57             : 
      58             : // Return the AST analysis result, in the order defined by the call DAG
      59             : MetadataList CreateASTMetadataHLSL(TIntermNode *root, const CallDAG &callDag);
      60             : 
      61             : }  // namespace sh
      62             : 
      63             : #endif // COMPILER_TRANSLATOR_ASTMETADATAHLSL_H_