Remove <canvas>

sky/engine/core/html/HTMLCanvasElement.h

-/*
- * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved.
- * Copyright (C) 2007 Alp Toker <alp@atoker.com>
- * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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 SKY_ENGINE_CORE_HTML_HTMLCANVASELEMENT_H_
-#define SKY_ENGINE_CORE_HTML_HTMLCANVASELEMENT_H_
-
-#include "base/cancelable_callback.h"
-#include "sky/engine/core/dom/Document.h"
-#include "sky/engine/core/html/HTMLElement.h"
-#include "sky/engine/core/html/canvas/CanvasImageSource.h"
-#include "sky/engine/platform/geometry/FloatRect.h"
-#include "sky/engine/platform/geometry/IntSize.h"
-#include "sky/engine/platform/graphics/Canvas2DLayerBridge.h"
-#include "sky/engine/platform/graphics/GraphicsTypes.h"
-#include "sky/engine/platform/graphics/ImageBufferClient.h"
-#include "sky/engine/platform/heap/Handle.h"
-#include "sky/engine/public/platform/WebThread.h"
-#include "sky/engine/wtf/Forward.h"
-
-#define CanvasDefaultInterpolationQuality InterpolationLow
-
-namespace blink {
-
-class AffineTransform;
-class CanvasContextAttributes;
-class CanvasRenderingContext;
-class GraphicsContext;
-class GraphicsContextStateSaver;
-class HTMLCanvasElement;
-class Image;
-class ImageData;
-class ImageBuffer;
-class ImageBufferSurface;
-class IntSize;
-
-class CanvasObserver {
-    DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(CanvasObserver);
-public:
-    virtual void canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect) = 0;
-    virtual void canvasResized(HTMLCanvasElement*) = 0;
-#if !ENABLE(OILPAN)
-    virtual void canvasDestroyed(HTMLCanvasElement*) = 0;
-#endif
-};
-
-class HTMLCanvasElement final : public HTMLElement, public CanvasImageSource, public ImageBufferClient {
-    DEFINE_WRAPPERTYPEINFO();
-public:
-    DECLARE_NODE_FACTORY(HTMLCanvasElement);
-    virtual ~HTMLCanvasElement();
-
-    void addObserver(CanvasObserver*);
-    void removeObserver(CanvasObserver*);
-
-    // Attributes and functions exposed to script
-    int width() const { return size().width(); }
-    int height() const { return size().height(); }
-
-    const IntSize& size() const { return m_size; }
-
-    void setWidth(int);
-    void setHeight(int);
-    void setAccelerationDisabled(bool accelerationDisabled) { m_accelerationDisabled = accelerationDisabled; }
-    bool accelerationDisabled() const { return m_accelerationDisabled; }
-
-    void setSize(const IntSize& newSize)
-    {
-        if (newSize == size())
-            return;
-        m_ignoreReset = true;
-        setWidth(newSize.width());
-        setHeight(newSize.height());
-        m_ignoreReset = false;
-        reset();
-    }
-
-    CanvasRenderingContext2D* getContext(const String&, CanvasContextAttributes* attributes = 0);
-
-    static String toEncodingMimeType(const String& mimeType);
-    String toDataURL(const String& mimeType, const double* quality, ExceptionState&) const;
-    String toDataURL(const String& mimeType, ExceptionState& exceptionState) const { return toDataURL(mimeType, 0, exceptionState); }
-
-    // Used for rendering
-    void didDraw(const FloatRect&);
-    void notifyObserversCanvasChanged(const FloatRect&);
-
-    void paint(GraphicsContext*, const LayoutRect&);
-
-    GraphicsContext* drawingContext() const;
-    GraphicsContext* existingDrawingContext() const;
-
-    CanvasRenderingContext* renderingContext() const { return m_context.get(); }
-
-    void ensureUnacceleratedImageBuffer();
-    ImageBuffer* buffer() const;
-    Image* copiedImage() const;
-    void clearCopiedImage();
-    PassRefPtr<ImageData> getImageData() const;
-    void makePresentationCopy();
-    void clearPresentationCopy();
-
-    AffineTransform baseTransform() const;
-
-    bool is3D() const;
-
-    bool hasImageBuffer() const { return m_imageBuffer; }
-    bool hasValidImageBuffer() const;
-    void discardImageBuffer();
-
-    bool shouldAccelerate(const IntSize&) const;
-
-    virtual const AtomicString imageSourceURL() const override;
-
-    // CanvasImageSource implementation
-    virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageMode, SourceImageStatus*) const override;
-    virtual FloatSize sourceSize() const override;
-
-    // ImageBufferClient implementation
-    virtual void notifySurfaceInvalid() override;
-    virtual bool isDirty() override { return !m_dirtyRect.isEmpty(); }
-    virtual void didFinalizeFrame() override;
-
-private:
-    explicit HTMLCanvasElement(Document&);
-
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual RenderObject* createRenderer(RenderStyle*) override;
-
-    void finalizeFrameMicrotask();
-
-    void reset();
-
-    PassOwnPtr<ImageBufferSurface> createImageBufferSurface(const IntSize& deviceSize, int* msaaSampleCount);
-    void createImageBuffer();
-    void createImageBufferInternal();
-    void clearImageBuffer();
-
-    void resetDirtyRect();
-
-    void setSurfaceSize(const IntSize&);
-
-    bool paintsIntoCanvasBuffer() const;
-
-    void updateExternallyAllocatedMemory() const;
-
-    String toDataURLInternal(const String& mimeType, const double* quality, bool isSaving = false) const;
-
-    HashSet<RawPtr<CanvasObserver> > m_observers;
-
-    IntSize m_size;
-
-    OwnPtr<CanvasRenderingContext> m_context;
-
-    bool m_ignoreReset;
-    bool m_accelerationDisabled;
-    // FIXME(sky): Do we need this in sky since we don't do paint invalidation?
-    FloatRect m_dirtyRect;
-    base::CancelableClosure m_finalizeFrameTask;
-
-    mutable intptr_t m_externallyAllocatedMemory;
-
-    // It prevents HTMLCanvasElement::buffer() from continuously re-attempting to allocate an imageBuffer
-    // after the first attempt failed.
-    mutable bool m_didFailToCreateImageBuffer;
-    mutable bool m_didClearImageBuffer;
-    OwnPtr<ImageBuffer> m_imageBuffer;
-    mutable OwnPtr<GraphicsContextStateSaver> m_contextStateSaver;
-
-    mutable RefPtr<Image> m_presentedImage;
-    mutable RefPtr<Image> m_copiedImage; // FIXME: This is temporary for platforms that have to copy the image buffer to render.
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_HTML_HTMLCANVASELEMENT_H_