Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLSharedResources.h

Index: Source/core/html/canvas/WebGLSharedResources.h
diff --git a/Source/core/html/canvas/WebGLDrawBuffers.h b/Source/core/html/canvas/WebGLSharedResources.h
similarity index 68%
copy from Source/core/html/canvas/WebGLDrawBuffers.h
copy to Source/core/html/canvas/WebGLSharedResources.h
index b002f221e2303914d5b79041143ae4166de01111..a3c64a2ce81ebcb35e84bfc0993e411c0ee75569 100644
--- a/Source/core/html/canvas/WebGLDrawBuffers.h
+++ b/Source/core/html/canvas/WebGLSharedResources.h
@@ -23,32 +23,41 @@
  * 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