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

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• Hash : e61209af
  Author :
  Date : 2014-09-26T12:01:17
  

  Add option to support EXT_draw_buffers with NV_draw_buffers
  
  After this patch, it is possible to set a flag to change
  EXT_draw_buffers extension directives to NV_draw_buffers in ESSL.
  This enables users of ANGLE to emulate EXT_draw_buffers by using
  NV_draw_buffers in combination with GLES3.0.
  
  Change-Id: I5dacdbd6cd0d0362424ea3791557342c42efd4bd
  Reviewed-on: https://chromium-review.googlesource.com/219941
  Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
  Tested-by: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/TranslatorESSL.cpp

• //
  // Copyright (c) 2002-2013 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/translator/TranslatorESSL.h"
  
  #include "compiler/translator/OutputESSL.h"
  #include "angle_gl.h"
  
  TranslatorESSL::TranslatorESSL(sh::GLenum type, ShShaderSpec spec)
      : TCompiler(type, spec, SH_ESSL_OUTPUT) {
  }
  
  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() == GL_FRAGMENT_SHADER);
  
      // Write array bounds clamping emulation if needed.
      getArrayBoundsClamper().OutputClampingFunctionDefinition(sink);
  
      // Write translated shader.
      TOutputESSL outputESSL(sink, getArrayIndexClampingStrategy(), getHashFunction(), getNameMap(), getSymbolTable(), getShaderVersion());
      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) {
              if (getResources().NV_draw_buffers && iter->first == "GL_EXT_draw_buffers") {
                  sink << "#extension GL_NV_draw_buffers : "
                       << getBehaviorString(iter->second) << "\n";
              } else {
                  sink << "#extension " << iter->first << " : "
                       << getBehaviorString(iter->second) << "\n";
              }
          }
      }
  }
  

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