kc3-lang/angle/src/compiler/TranslatorESSL.cpp

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• Author : shannon.woods@transgaming.com
  Date : 2013-01-25 21:57:28
  Hash : 1d432bb5
  Message : Incorporated patch from haixia@ changing the default implementation of array index clamping to use the clamp intrinsic. This works more reliably on pure OpenGL ES devices and on Windows. Added a mechanism in ShBuiltInResources to choose the strategy for array index clamping. BUG=none TEST=various out-of-bounds array indexing tests and various WebGL content Review URL: https://codereview.appspot.com/7194051 git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1798 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/compiler/TranslatorESSL.cpp

• //
  // Copyright (c) 2002-2011 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.
  //
  
  #include "compiler/TranslatorESSL.h"
  
  #include "compiler/OutputESSL.h"
  
  TranslatorESSL::TranslatorESSL(ShShaderType type, ShShaderSpec spec)
      : TCompiler(type, spec) {
  }
  
  void TranslatorESSL::translate(TIntermNode* root) {
      TInfoSinkBase& sink = getInfoSink().obj;
  
      // Write built-in extension behaviors.
      writeExtensionBehavior();
  
      // Write emulated built-in functions if needed.
      getBuiltInFunctionEmulator().OutputEmulatedFunctionDefinition(
          sink, getShaderType() == SH_FRAGMENT_SHADER);
  
      // Write array bounds clamping emulation if needed.
      getArrayBoundsClamper().OutputClampingFunctionDefinition(sink);
  
      // Write translated shader.
      TOutputESSL outputESSL(sink, getArrayIndexClampingStrategy(), getHashFunction(), getNameMap(), getSymbolTable());
      root->traverse(&outputESSL);
  }
  
  void TranslatorESSL::writeExtensionBehavior() {
      TInfoSinkBase& sink = getInfoSink().obj;
      const TExtensionBehavior& extensionBehavior = getExtensionBehavior();
      for (TExtensionBehavior::const_iterator iter = extensionBehavior.begin();
           iter != extensionBehavior.end(); ++iter) {
          if (iter->second != EBhUndefined) {
              sink << "#extension " << iter->first << " : "
                   << getBehaviorString(iter->second) << "\n";
          }
      }
  }