Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLSharedResources.h

 /*
  * Copyright (C) 2013 Google 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 AND ITS CONTRIBUTORS "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 OR ITS 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 WebGLDrawBuffers_h
-#define WebGLDrawBuffers_h
+#ifndef WebGLSharedResources_h
+#define WebGLSharedResources_h
 
-#include "bindings/v8/ScriptWrappable.h"
 #include "core/html/canvas/WebGLExtension.h"
+#include "core/html/canvas/WebGLSharedObject.h"
 #include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
-class WebGLDrawBuffers : public WebGLExtension, public ScriptWrappable {
+class WebGLShader;
+class WebGLShareGroup;
+
+typedef int ExceptionCode;
+
+class WebGLSharedResources : public WebGLExtension {
 public:
-    static PassRefPtr<WebGLDrawBuffers> create(WebGLRenderingContext*);
+    static PassRefPtr<WebGLSharedResources> create(WebGLRenderingContext*);
     static bool supported(WebGLRenderingContext*);
     static const char* getExtensionName();
 
-    virtual ~WebGLDrawBuffers();
+    virtual ~WebGLSharedResources();
     virtual ExtensionName getName() const;
 
-    void drawBuffersWEBGL(const Vector<GC3Denum>& buffers);
+    PassRefPtr<WebGLShareGroup> group() const;
+
+    long acquireSharedResource(WebGLSharedObject*, unsigned, PassRefPtr<WebGLAcquireSharedResourceCallback>, ExceptionCode&);
+    void releaseSharedResource(WebGLSharedObject*, ExceptionCode&);
+    void cancelAcquireSharedResource(long);
 
 private:
-    WebGLDrawBuffers(WebGLRenderingContext*);
+    WebGLSharedResources(WebGLRenderingContext*);
 
-    static bool satisfiesWebGLRequirements(WebGLRenderingContext*);
+    RefPtr<WebGLShareGroup> m_shareGroup;
 };
 
 } // namespace WebCore
 
-#endif // WebGLDrawBuffers_h
+#endif // WebGLSharedResources_h