text: /*
   * Copyright (C) 2009 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef WebGLRenderingContext_h
  #define WebGLRenderingContext_h
  
  #include "bindings/core/v8/ScriptWrappable.h"
  #include "core/html/canvas/WebGLRenderingContextBase.h"
  
  namespace blink {
  
  class WebGLRenderingContext final : public WebGLRenderingContextBase, public ScriptWrappable {
      DEFINE_WRAPPERTYPEINFO();
  public:
      static PassOwnPtr<WebGLRenderingContext> create(HTMLCanvasElement*, WebGLContextAttributes*);
      virtual ~WebGLRenderingContext();
  
      virtual unsigned version() const override { return 1; }
      virtual String contextName() const override { return "WebGLRenderingContext"; }
      virtual void registerContextExtensions() override;
  
  private:
      WebGLRenderingContext(HTMLCanvasElement*, PassOwnPtr<blink::WebGraphicsContext3D>, WebGLContextAttributes*);
  
      // Enabled extension objects.
      RefPtr<ANGLEInstancedArrays> m_angleInstancedArrays;
      RefPtr<EXTBlendMinMax> m_extBlendMinMax;
      RefPtr<EXTFragDepth> m_extFragDepth;
      RefPtr<EXTShaderTextureLOD> m_extShaderTextureLOD;
      RefPtr<EXTTextureFilterAnisotropic> m_extTextureFilterAnisotropic;
      RefPtr<OESTextureFloat> m_oesTextureFloat;
      RefPtr<OESTextureFloatLinear> m_oesTextureFloatLinear;
      RefPtr<OESTextureHalfFloat> m_oesTextureHalfFloat;
      RefPtr<OESTextureHalfFloatLinear> m_oesTextureHalfFloatLinear;
      RefPtr<OESStandardDerivatives> m_oesStandardDerivatives;
      RefPtr<OESVertexArrayObject> m_oesVertexArrayObject;
      RefPtr<OESElementIndexUint> m_oesElementIndexUint;
      RefPtr<WebGLLoseContext> m_webglLoseContext;
      RefPtr<WebGLDebugRendererInfo> m_webglDebugRendererInfo;
      RefPtr<WebGLDebugShaders> m_webglDebugShaders;
      RefPtr<WebGLDrawBuffers> m_webglDrawBuffers;
      RefPtr<WebGLCompressedTextureATC> m_webglCompressedTextureATC;
      RefPtr<WebGLCompressedTextureETC1> m_webglCompressedTextureETC1;
      RefPtr<WebGLCompressedTexturePVRTC> m_webglCompressedTexturePVRTC;
      RefPtr<WebGLCompressedTextureS3TC> m_webglCompressedTextureS3TC;
      RefPtr<WebGLDepthTexture> m_webglDepthTexture;
  };
  
  DEFINE_TYPE_CASTS(WebGLRenderingContext, CanvasRenderingContext, context,
      context->is3d() && WebGLRenderingContextBase::getWebGLVersion(context) == 1,
      context.is3d() && WebGLRenderingContextBase::getWebGLVersion(&context) == 1);
  
  } // namespace blink
  
  #endif // WebGLRenderingContext_h
  