kc3-lang/angle/src/compiler/DetectDiscontinuity.h

Branch : - branch - main - tag -

• Show log

  Commit

• Author : daniel@transgaming.com
  Date : 2012-05-31 01:20:24
  Hash : 79744f22
  Message : Added a traverser for detecting gradient operations. TRAC #20737 Signed-off-by: Daniel Koch Author: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/trunk@1121 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/compiler/DetectDiscontinuity.h

• //
  // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // Contains analysis utilities for dealing with HLSL's lack of support for
  // the use of intrinsic functions which (implicitly or explicitly) compute
  // gradients of functions with discontinuities. 
  //
  
  #ifndef COMPILER_DETECTDISCONTINUITY_H_
  #define COMPILER_DETECTDISCONTINUITY_H_
  
  #include "compiler/intermediate.h"
  
  namespace sh
  {
  // Checks whether a loop can run for a variable number of iterations
  class DetectLoopDiscontinuity : public TIntermTraverser
  {
    public:
      bool traverse(TIntermNode *node);
  
    protected:
      bool visitBranch(Visit visit, TIntermBranch *node);
      bool visitAggregate(Visit visit, TIntermAggregate *node);
  
      bool mLoopDiscontinuity;
  };
  
  bool containsLoopDiscontinuity(TIntermNode *node);
  
  // Checks for intrinsic functions which compute gradients
  class DetectGradientOperation : public TIntermTraverser
  {
    public:
      bool traverse(TIntermNode *node);
  
    protected:
      bool visitUnary(Visit visit, TIntermUnary *node);
      bool visitAggregate(Visit visit, TIntermAggregate *node);
  
      bool mGradientOperation;
  };
  
  bool containsGradientOperation(TIntermNode *node);
  
  }
  
  #endif   // COMPILER_DETECTDISCONTINUITY_H_