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 CanvasObject_h
  #define CanvasObject_h
  
  #include <wtf/PassRefPtr.h>
  #include <wtf/RefCounted.h>
  
  #include "GraphicsContext3D.h"
  
  namespace WebCore {
  
      class WebGLRenderingContext;
      
      class CanvasObject : public RefCounted<CanvasObject> {
      public:
          virtual ~CanvasObject();
          
          Platform3DObject object() const { return m_object; }
          void setObject(Platform3DObject, bool shouldDeleteObject = true);
          void deleteObject();
          
          void detachContext()
          {
              deleteObject();
              m_context = 0;
          }
  
          WebGLRenderingContext* context() const { return m_context; }
  
      protected:
          CanvasObject(WebGLRenderingContext*);
          virtual void _deleteObject(Platform3DObject) = 0;
      
      private:
          Platform3DObject m_object;
          // The shouldDeleteObject flag indicates whether this wrapper
          // owns the underlying resource and should delete it when the
          // wrapper is unreferenced for the last time and deleted. It
          // is only set to false for certain objects returned from get
          // queries. FIXME: should consider canonicalizing all of these
          // objects in the future.
          bool m_shouldDeleteObject;
          WebGLRenderingContext* m_context;
      };
      
  } // namespace WebCore
  
  #endif // CanvasObject_h
  