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/*
* Copyright (C) 2004, 2005, 2006 Apple 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:
* 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 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 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.
*/
#pragma once
#include "ImageTypes.h"
#include <wtf/RefCounted.h>
#include <wtf/URL.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class Image;
class IntRect;
// Interface for notification about changes to an image, including decoding,
// drawing, and animating.
class ImageObserver : public RefCounted<ImageObserver>, public CanMakeWeakPtr<ImageObserver> {
public:
virtual ~ImageObserver() = default;
virtual URL sourceUrl() const = 0;
virtual String mimeType() const = 0;
virtual long long expectedContentLength() const = 0;
virtual void encodedDataStatusChanged(const Image&, EncodedDataStatus) { };
virtual void decodedSizeChanged(const Image&, long long delta) = 0;
virtual void didDraw(const Image&) = 0;
virtual bool canDestroyDecodedData(const Image&) = 0;
virtual void imageFrameAvailable(const Image&, ImageAnimatingState, const IntRect* changeRect = nullptr, DecodingStatus = DecodingStatus::Invalid) = 0;
virtual void changedInRect(const Image&, const IntRect* changeRect = nullptr) = 0;
virtual void scheduleRenderingUpdate(const Image&) = 0;
virtual bool allowsAnimation(const Image&) const { return true; }
virtual bool layerBasedSVGEngineEnabled() const { return false; }
protected:
ImageObserver() = default;
};
}
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