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

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  Commit

• 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/TranslatorGLSL.cpp

• //
  // Copyright (c) 2002-2010 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/TranslatorGLSL.h"
  
  #include "compiler/OutputGLSL.h"
  #include "compiler/VersionGLSL.h"
  
  static void writeVersion(ShShaderType type, TIntermNode* root,
                           TInfoSinkBase& sink) {
      TVersionGLSL versionGLSL(type);
      root->traverse(&versionGLSL);
      int version = versionGLSL.getVersion();
      // We need to write version directive only if it is greater than 110.
      // If there is no version directive in the shader, 110 is implied.
      if (version > 110) {
          sink << "#version " << version << "\n";
      }
  }
  
  TranslatorGLSL::TranslatorGLSL(ShShaderType type, ShShaderSpec spec)
      : TCompiler(type, spec) {
  }
  
  void TranslatorGLSL::translate(TIntermNode* root) {
      TInfoSinkBase& sink = getInfoSink().obj;
  
      // Write GLSL version.
      writeVersion(getShaderType(), root, sink);
  
      // Write emulated built-in functions if needed.
      getBuiltInFunctionEmulator().OutputEmulatedFunctionDefinition(
          sink, false);
  
      // Write array bounds clamping emulation if needed.
      getArrayBoundsClamper().OutputClampingFunctionDefinition(sink);
  
      // Write translated shader.
      TOutputGLSL outputGLSL(sink, getArrayIndexClampingStrategy(), getHashFunction(), getNameMap(), getSymbolTable());
      root->traverse(&outputGLSL);
  }