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// Copyright 2013 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 ImageBitmap_h
#define ImageBitmap_h
#include "bindings/v8/ScriptWrappable.h"
#include "core/html/HTMLImageElement.h"
#include "core/html/canvas/CanvasImageSource.h"
#include "platform/geometry/IntRect.h"
#include "platform/graphics/Image.h"
#include "platform/heap/Handle.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
namespace WebCore {
class HTMLCanvasElement;
class HTMLVideoElement;
class ImageData;
class ImageBitmap FINAL : public RefCountedWillBeGarbageCollectedFinalized<ImageBitmap>, public ScriptWrappable, public ImageLoaderClient, public CanvasImageSource {
WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ImageBitmap);
public:
static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLImageElement*, const IntRect&);
static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLVideoElement*, const IntRect&);
static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLCanvasElement*, const IntRect&);
static PassRefPtrWillBeRawPtr<ImageBitmap> create(ImageData*, const IntRect&);
static PassRefPtrWillBeRawPtr<ImageBitmap> create(ImageBitmap*, const IntRect&);
static PassRefPtrWillBeRawPtr<ImageBitmap> create(Image*, const IntRect&);
PassRefPtr<Image> bitmapImage() const;
PassRefPtrWillBeRawPtr<HTMLImageElement> imageElement() const { return m_imageElement; }
IntRect bitmapRect() const { return m_bitmapRect; }
int width() const { return m_cropRect.width(); }
int height() const { return m_cropRect.height(); }
IntSize size() const { return m_cropRect.size(); }
virtual ~ImageBitmap();
// CanvasImageSource implementation
virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageMode, SourceImageStatus*) const OVERRIDE;
virtual bool wouldTaintOrigin(SecurityOrigin*) const OVERRIDE { return false; };
virtual void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const OVERRIDE;
virtual FloatSize sourceSize() const OVERRIDE;
virtual void trace(Visitor*);
private:
ImageBitmap(HTMLImageElement*, const IntRect&);
ImageBitmap(HTMLVideoElement*, const IntRect&);
ImageBitmap(HTMLCanvasElement*, const IntRect&);
ImageBitmap(ImageData*, const IntRect&);
ImageBitmap(ImageBitmap*, const IntRect&);
ImageBitmap(Image*, const IntRect&);
// ImageLoaderClient
virtual void notifyImageSourceChanged() OVERRIDE;
virtual bool requestsHighLiveResourceCachePriority() OVERRIDE { return true; }
// ImageBitmaps constructed from HTMLImageElements hold a reference to the HTMLImageElement until
// the image source changes.
RefPtrWillBeMember<HTMLImageElement> m_imageElement;
RefPtr<Image> m_bitmap;
IntRect m_bitmapRect; // The rect where the underlying Image should be placed in reference to the ImageBitmap.
IntRect m_cropRect;
// The offset by which the desired Image is stored internally.
// ImageBitmaps constructed from HTMLImageElements reference the entire ImageResource and may have a non-zero bitmap offset.
// ImageBitmaps not constructed from HTMLImageElements always pre-crop and store the image at (0, 0).
IntPoint m_bitmapOffset;
};
} // namespace WebCore
#endif // ImageBitmap_h
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