Use newImageSnapshot() to get an image from a Canvas

Source/platform/graphics/BitmapPattern.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BitmapPattern_h
+#define BitmapPattern_h
+
+#include "platform/graphics/Pattern.h"
+
+namespace blink {
+
+class BitmapPattern : public BitmapBackedPattern {
+public:
+    static PassRefPtr<BitmapPattern> create(PassRefPtr<Image> tileImage, bool repeatX, bool repeatY)
+    {
+        return adoptRef(new BitmapPattern(tileImage, repeatX, repeatY));
+    }
+
+    virtual ~BitmapPattern() { }
+
+    virtual PassRefPtr<SkShader> createShader(SkShader::ShaderLocation preferredLocation) OVERRIDE;
+
+protected:
+    virtual SkImageInfo getBitmapInfo() OVERRIDE;
+    virtual void drawBitmapToCanvas(SkCanvas&, SkPaint&) OVERRIDE;
+
+private:
+    BitmapPattern(PassRefPtr<Image>, bool repeatX, bool repeatY);
+
+    RefPtr<NativeImageSkia> m_tileImage;
+};
+
+} // namespace
+
+#endif