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      1 /*
      2  * Copyright (C) 2011 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef WebGLContextGroup_h
     27 #define WebGLContextGroup_h
     28 
     29 #include "core/html/canvas/WebGLRenderingContextBase.h"
     30 #include "wtf/HashSet.h"
     31 #include "wtf/PassRefPtr.h"
     32 #include "wtf/RefCounted.h"
     33 
     34 namespace blink {
     35 class WebGraphicsContext3D;
     36 }
     37 
     38 namespace WebCore {
     39 
     40 class WebGLExtension;
     41 class WebGLSharedObject;
     42 class WebGLRenderingContextBase;
     43 
     44 typedef int ExceptionCode;
     45 
     46 class WebGLContextGroup FINAL : public RefCounted<WebGLContextGroup> {
     47 public:
     48     static PassRefPtr<WebGLContextGroup> create();
     49     ~WebGLContextGroup();
     50 
     51     void addContext(WebGLRenderingContextBase*);
     52     void removeContext(WebGLRenderingContextBase*);
     53 
     54     void addObject(WebGLSharedObject*);
     55     void removeObject(WebGLSharedObject*);
     56 
     57     blink::WebGraphicsContext3D* getAWebGraphicsContext3D();
     58 
     59     void loseContextGroup(WebGLRenderingContextBase::LostContextMode);
     60 
     61   private:
     62     friend class WebGLObject;
     63 
     64     WebGLContextGroup();
     65 
     66     void detachAndRemoveAllObjects();
     67 
     68     HashSet<WebGLRenderingContextBase*> m_contexts;
     69     HashSet<WebGLSharedObject*> m_groupObjects;
     70 };
     71 
     72 } // namespace WebCore
     73 
     74 #endif // WebGLContextGroup_h
     75