Blob creation methods for ImageBitmap.

Source/modules/imagebitmap/ImageBitmapFactories.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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER 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 ImageBitmapFactories_h
+#define ImageBitmapFactories_h
+
+#include "bindings/v8/ScriptPromiseResolver.h"
+#include "bindings/v8/ScriptState.h"
+#include "core/fileapi/FileReaderLoader.h"
+#include "core/fileapi/FileReaderLoaderClient.h"
+#include "core/platform/Supplementable.h"
+#include "core/platform/graphics/IntRect.h"
+#include "wtf/Forward.h"
+#include "wtf/HashSet.h"
+
+namespace WebCore {
+
+class Blob;
+class CanvasRenderingContext2D;
+class EventTarget;
+class ExceptionState;
+class HTMLCanvasElement;
+class HTMLImageElement;
+class HTMLVideoElement;
+class ImageBitmap;
+class ImageData;
+class ScriptExecutionContext;
+
+class ImageBitmapFactories : public Supplement<DOMWindow> {
+
+class ImageBitmapLoader;
+
+public:
+    static ScriptObject createImageBitmap(EventTarget*, HTMLImageElement*, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, HTMLImageElement*, int sx, int sy, int sw, int sh, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, HTMLVideoElement*, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, HTMLVideoElement*, int sx, int sy, int sw, int sh, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, CanvasRenderingContext2D*, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, CanvasRenderingContext2D*, int sx, int sy, int sw, int sh, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, HTMLCanvasElement*, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, HTMLCanvasElement*, int sx, int sy, int sw, int sh, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, Blob*, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, Blob*, int sx, int sy, int sw, int sh, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, ImageData*, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, ImageData*, int sx, int sy, int sw, int sh, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, ImageBitmap*, ExceptionState&);
+    static ScriptObject createImageBitmap(EventTarget*, ImageBitmap*, int sx, int sy, int sw, int sh, ExceptionState&);
+
+    void didStartLoading(PassRefPtr<ImageBitmapLoader>);
+    void didFinishLoading(PassRefPtr<ImageBitmapLoader>);
+
+    virtual ~ImageBitmapFactories() { }
+    static ImageBitmapFactories* from(DOMWindow*);
+
+private:
+    class ImageBitmapLoader : public RefCounted<ImageBitmapLoader>, public FileReaderLoaderClient {
+    public:
+        static PassRefPtr<ImageBitmapLoader> create(ImageBitmapFactories* factory, PassRefPtr<ScriptPromiseResolver> resolver, const IntRect& cropRect)
+        {
+            return adoptRef(new ImageBitmapLoader(factory, resolver, cropRect));
+        }
+
+        void loadBlobAsync(ScriptExecutionContext*, Blob*);
+
+        ~ImageBitmapLoader() { }
+
+    private:
+        ImageBitmapLoader(ImageBitmapFactories*, PassRefPtr<ScriptPromiseResolver>, const IntRect&);
+
+        void rejectPromise();
+
+        // FileReaderLoaderClient
+        virtual void didStartLoading() OVERRIDE { }
+        virtual void didReceiveData() OVERRIDE { }
+        virtual void didFinishLoading() OVERRIDE;
+        virtual void didFail(FileError::ErrorCode) OVERRIDE;
+
+        ScriptState* m_scriptState;
+        FileReaderLoader m_loader;
+        ImageBitmapFactories* m_factory;
+        RefPtr<ScriptPromiseResolver> m_resolver;
+        IntRect m_cropRect;
+    };
+
+    static const char* supplementName();
+
+    HashSet<RefPtr<ImageBitmapLoader> > m_pendingLoaders;
+};
+
+} // namespace WebCore
+
+#endif // ImageBitmapFactories_h