Use newImageSnapshot() to get an image from a Canvas

Source/platform/graphics/StaticBitmapImage.h

 /*
- * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2008 Apple Computer, 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 ImageObserver_h
-#define ImageObserver_h
+#ifndef StaticBitmapImage_h
+#define StaticBitmapImage_h
 
-#include "platform/PlatformExport.h"
+#include "SkImage.h"
+
+#include "platform/graphics/Image.h"
 
 namespace WebCore {
 
-class Image;
-class IntRect;
+class PLATFORM_EXPORT StaticBitmapImage : public Image {
+public:
 
-// Interface for notification about changes to an image, including decoding,
-// drawing, and animating.
-class PLATFORM_EXPORT ImageObserver {
+    static PassRefPtr<Image> create(PassRefPtr<SkImage>);
+    virtual void destroyDecodedData(bool destroyAll) { }
+    virtual bool currentFrameKnownToBeOpaque() { return false; }
+    virtual IntSize size() const { return IntSize(m_image->height(), m_image->width()); }
+    virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator, blink::WebBlendMode);
+
+
+    PassRefPtr<SkImage> image() OVERRIDE { return m_image; }
+
 protected:
-    virtual ~ImageObserver();
-public:
-    virtual void decodedSizeChanged(const Image*, int delta) = 0;
-    virtual void didDraw(const Image*) = 0;
+    StaticBitmapImage(PassRefPtr<SkImage>);
 
-    virtual bool shouldPauseAnimation(const Image*) = 0;
-    virtual void animationAdvanced(const Image*) = 0;
-
-    virtual void changedInRect(const Image*, const IntRect&) = 0;
+    RefPtr<SkImage> m_image;
 };
 
 }
 
 #endif