Line data    Source code

       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_ARRAYBOUNDSCLAMPER_H_
      27             : #define THIRD_PARTY_COMPILER_ARRAYBOUNDSCLAMPER_H_
      28             : 
      29             : #include "compiler/translator/InfoSink.h"
      30             : #include "compiler/translator/IntermNode.h"
      31             : 
      32             : namespace sh
      33             : {
      34             : 
      35             : class ArrayBoundsClamper
      36             : {
      37             :   public:
      38             :     ArrayBoundsClamper();
      39             : 
      40             :     // Must be set before compiling any shaders to ensure consistency
      41             :     // between the translated shaders and any necessary prequel.
      42             :     void SetClampingStrategy(ShArrayIndexClampingStrategy clampingStrategy);
      43             : 
      44             :     // Marks nodes in the tree that index arrays indirectly as
      45             :     // requiring clamping.
      46             :     void MarkIndirectArrayBoundsForClamping(TIntermNode* root);
      47             : 
      48             :     // If necessary, output array clamp function source into the shader source.
      49             :     void OutputClampingFunctionDefinition(TInfoSinkBase& out) const;
      50             : 
      51           0 :     void Cleanup()
      52             :     {
      53           0 :         mArrayBoundsClampDefinitionNeeded = false;
      54           0 :     }
      55             : 
      56             : private:
      57             :     bool GetArrayBoundsClampDefinitionNeeded() const { return mArrayBoundsClampDefinitionNeeded; }
      58           0 :     void SetArrayBoundsClampDefinitionNeeded() { mArrayBoundsClampDefinitionNeeded = true; }
      59             : 
      60             :     ShArrayIndexClampingStrategy mClampingStrategy;
      61             :     bool mArrayBoundsClampDefinitionNeeded;
      62             : };
      63             : 
      64             : }  // namespace sh
      65             : 
      66             : #endif // THIRD_PARTY_COMPILER_ARRAYBOUNDSCLAMPER_H_