/* Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) Copyright (C) 2001 Dirk Mueller <mueller@kde.org> Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #pragma once #include "CachedResourceClient.h" #include "ImageTypes.h" namespace WebCore { class CachedImage; class IntRect; enum class VisibleInViewportState { Unknown, Yes, No }; class CachedImageClient : public CachedResourceClient { public: virtual ~CachedImageClient() = default; static CachedResourceClientType expectedType() { return ImageType; } CachedResourceClientType resourceClientType() const override { return expectedType(); } // Called whenever a frame of an image changes because we got more data from the network. // If not null, the IntRect is the changed rect of the image. virtual void imageChanged(CachedImage*, const IntRect* = nullptr) { } virtual bool canDestroyDecodedData() { return true; } // Called when a new decoded frame for a large image is available or when an animated image is ready to advance to the next frame. virtual VisibleInViewportState imageFrameAvailable(CachedImage& image, ImageAnimatingState, const IntRect* changeRect) { imageChanged(&image, changeRect); return VisibleInViewportState::No; } virtual void didRemoveCachedImageClient(CachedImage&) { } virtual void scheduleTimedRenderingUpdate() { } }; } // namespace WebCore