third_party/WebKit/Source/core/frame/ImageBitmap.h

// 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/core/v8/ScriptWrappable.h"
#include "core/CoreExport.h"
#include "core/html/HTMLImageElement.h"
#include "core/html/canvas/CanvasImageSource.h"
#include "core/imagebitmap/ImageBitmapOptions.h"
#include "core/imagebitmap/ImageBitmapSource.h"
#include "platform/geometry/IntRect.h"
#include "platform/graphics/Image.h"
#include "platform/graphics/ImageBuffer.h"
#include "platform/graphics/StaticBitmapImage.h"
#include "platform/heap/Handle.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"

namespace blink {

class HTMLCanvasElement;
class HTMLVideoElement;
class ImageData;

class CORE_EXPORT ImageBitmap final : public RefCountedWillBeGarbageCollectedFinalized<ImageBitmap>, public ScriptWrappable, public ImageLoaderClient, public CanvasImageSource, public ImageBitmapSource {
    DEFINE_WRAPPERTYPEINFO();
    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ImageBitmap);
public:
    static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLImageElement*, const IntRect&, Document*, const ImageBitmapOptions& = ImageBitmapOptions());
    static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLVideoElement*, const IntRect&, Document*, const ImageBitmapOptions& = ImageBitmapOptions());
    static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLCanvasElement*, const IntRect&, const ImageBitmapOptions& = ImageBitmapOptions());
    static PassRefPtrWillBeRawPtr<ImageBitmap> create(ImageData*, const IntRect&, const ImageBitmapOptions& = ImageBitmapOptions());
    static PassRefPtrWillBeRawPtr<ImageBitmap> create(ImageBitmap*, const IntRect&, const ImageBitmapOptions& = ImageBitmapOptions());
    static PassRefPtrWillBeRawPtr<ImageBitmap> create(PassRefPtr<StaticBitmapImage>);
    static PassRefPtrWillBeRawPtr<ImageBitmap> create(PassRefPtr<StaticBitmapImage>, const IntRect&, const ImageBitmapOptions& = ImageBitmapOptions());

    StaticBitmapImage* bitmapImage() const { return (m_image) ? m_image.get() : nullptr; }
    PassOwnPtr<uint8_t[]> copyBitmapData();
    unsigned long width() const;
    unsigned long height() const;
    IntSize size() const;

    bool isNeutered() const { return m_isNeutered; }
    bool originClean() const { return m_image->originClean(); }
    PassRefPtr<StaticBitmapImage> transfer();
    void close();

    ~ImageBitmap() override;

    // CanvasImageSource implementation
    PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, AccelerationHint, SnapshotReason) const override;
    bool wouldTaintOrigin(SecurityOrigin*) const override { return !m_image->originClean(); }
    void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const override;
    FloatSize elementSize() const override;

    // ImageBitmapSource implementation
    IntSize bitmapSourceSize() const override { return size(); }
    ScriptPromise createImageBitmap(ScriptState*, EventTarget&, int sx, int sy, int sw, int sh, const ImageBitmapOptions&, ExceptionState&) override;

    DECLARE_VIRTUAL_TRACE();

private:
    ImageBitmap(HTMLImageElement*, const IntRect&, Document*, const ImageBitmapOptions&);
    ImageBitmap(HTMLVideoElement*, const IntRect&, Document*, const ImageBitmapOptions&);
    ImageBitmap(HTMLCanvasElement*, const IntRect&, const ImageBitmapOptions&);
    ImageBitmap(ImageData*, const IntRect&, const ImageBitmapOptions&);
    ImageBitmap(ImageBitmap*, const IntRect&, const ImageBitmapOptions&);
    ImageBitmap(PassRefPtr<StaticBitmapImage>);
    ImageBitmap(PassRefPtr<StaticBitmapImage>, const IntRect&, const ImageBitmapOptions&);

    // ImageLoaderClient
    void notifyImageSourceChanged() override;
    bool requestsHighLiveResourceCachePriority() override { return true; }

    RefPtr<StaticBitmapImage> m_image;
    bool m_isNeutered = false;
};

} // namespace blink

#endif // ImageBitmap_h