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

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• Author : alokp@chromium.org
  Date : 2010-10-13 19:28:25
  Hash : 9ecf3950
  Message : GLSL backend now emits "#version 120" to legally access invariant keyword and gl_PointCoord built-in variable. BUG=35 Review URL: http://codereview.appspot.com/2341043 git-svn-id: https://angleproject.googlecode.com/svn/trunk@448 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 translated shader.
      TOutputGLSL outputGLSL(sink);
      root->traverse(&outputGLSL);
  }