1 /* 2 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_IMAGE_OBSERVER_H_ 27 #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_IMAGE_OBSERVER_H_ 28 29 #include "third_party/blink/renderer/platform/heap/handle.h" 30 #include "third_party/blink/renderer/platform/platform_export.h" 31 32 namespace blink { 33 34 class Image; 35 36 // Interface for notification about changes to an image, including decoding, 37 // drawing, and animating. 38 class PLATFORM_EXPORT ImageObserver : public GarbageCollectedMixin { 39 protected: 40 virtual ~ImageObserver(); 41 42 public: 43 virtual void DecodedSizeChangedTo(const Image*, size_t new_size) = 0; 44 45 virtual bool ShouldPauseAnimation(const Image*) = 0; 46 47 // Notification for when the image's contents have changed such as when an 48 // SVG image animates. 49 virtual void Changed(const Image*) = 0; 50 51 // See the comment of Image::SetData(). 52 virtual void AsyncLoadCompleted(const Image*) = 0; 53 Trace(Visitor * visitor)54 void Trace(Visitor* visitor) override {} 55 }; 56 57 } // namespace blink 58 59 #endif 60