1 /* 2 Copyright (C) 1998 Lars Knoll (knoll (at) mpi-hd.mpg.de) 3 Copyright (C) 2001 Dirk Mueller <mueller (at) kde.org> 4 Copyright (C) 2006 Samuel Weinig (sam.weinig (at) gmail.com) 5 Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. 6 7 This library is free software; you can redistribute it and/or 8 modify it under the terms of the GNU Library General Public 9 License as published by the Free Software Foundation; either 10 version 2 of the License, or (at your option) any later version. 11 12 This library is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 Library General Public License for more details. 16 17 You should have received a copy of the GNU Library General Public License 18 along with this library; see the file COPYING.LIB. If not, write to 19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 Boston, MA 02110-1301, USA. 21 */ 22 23 #ifndef ImageResourceClient_h 24 #define ImageResourceClient_h 25 26 #include "core/fetch/ResourceClient.h" 27 28 namespace blink { 29 30 class ImageResource; 31 class IntRect; 32 33 class ImageResourceClient : public ResourceClient { 34 public: 35 virtual ~ImageResourceClient() { } 36 static ResourceClientType expectedType() { return ImageType; } 37 virtual ResourceClientType resourceClientType() const OVERRIDE FINAL { return expectedType(); } 38 39 // Called whenever a frame of an image changes, either because we got more data from the network or 40 // because we are animating. If not null, the IntRect is the changed rect of the image. 41 virtual void imageChanged(ImageResource*, const IntRect* = 0) { } 42 43 // Called to find out if this client wants to actually display the image. Used to tell when we 44 // can halt animation. Content nodes that hold image refs for example would not render the image, 45 // but RenderImages would (assuming they have visibility: visible and their render tree isn't hidden 46 // e.g., in the b/f cache or in a background tab). 47 virtual bool willRenderImage(ImageResource*) { return false; } 48 }; 49 50 } 51 52 #endif 53
