1 /* 2 * Copyright (C) 2010 Google 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef AsyncImageResizer_h 32 #define AsyncImageResizer_h 33 34 #if ENABLE(IMAGE_RESIZER) 35 36 #include "Blob.h" 37 #include "CachedResourceClient.h" 38 #include "IntSize.h" 39 #include "ScriptValue.h" 40 41 namespace WebCore { 42 43 class CachedImage; 44 class ImageResizerThread; 45 46 // AsyncImageResizer waits for the CachedImage that is passed in to load completely, 47 // then starts an ImageResizerThread to resize the image. Once created, ImageResizerThread 48 // becomes in charge of its own lifetime and that of AsyncImageResizer. After the callbacks 49 // occur, both objects are destroyed. If the document is destroyed during resizing, 50 // AsyncImageResizer will receive a notification and subsequently block the callbacks from 51 // occurring. 52 class AsyncImageResizer : public CachedResourceClient, public RefCounted<AsyncImageResizer> { 53 public: 54 struct CallbackInfo { CallbackInfoCallbackInfo55 CallbackInfo(PassRefPtr<AsyncImageResizer> asyncImageResizer) 56 : asyncImageResizer(asyncImageResizer) 57 , blob(0) 58 { 59 } 60 61 RefPtr<AsyncImageResizer> asyncImageResizer; 62 RefPtr<Blob> blob; 63 }; 64 65 enum OutputType { 66 JPEG, 67 PNG 68 }; 69 70 enum AspectRatioOption { 71 PreserveAspectRatio, 72 IgnoreAspectRatio 73 }; 74 75 enum OrientationOption { 76 CorrectOrientation, 77 IgnoreOrientation 78 }; 79 80 static PassRefPtr<AsyncImageResizer> create(CachedImage*, OutputType, IntSize desiredBounds, ScriptValue successCallback, ScriptValue errorCallback, float quality, AspectRatioOption, OrientationOption); 81 ~AsyncImageResizer(); 82 83 // FIXME: Insert override function for notification of document destruction (change m_callbacksOk). 84 resizeComplete(RefPtr<Blob>)85 void resizeComplete(RefPtr<Blob>) { /* FIXME: Not yet implemented. */ } resizeError()86 void resizeError() { /* FIXME: Not yet implemented. */ } 87 88 private: 89 AsyncImageResizer(CachedImage*, OutputType, IntSize desiredBounds, ScriptValue successCallback, ScriptValue errorCallback, float quality, AspectRatioOption, OrientationOption); 90 virtual void notifyFinished(CachedResource*); 91 92 CachedImage* m_cachedImage; 93 ScriptValue m_successCallback; 94 ScriptValue m_errorCallback; 95 96 // Parameters to pass into ImageResizerThread. 97 OutputType m_outputType; 98 IntSize m_desiredBounds; 99 float m_quality; 100 AspectRatioOption m_aspectRatioOption; 101 OrientationOption m_orientationOption; 102 }; 103 104 } // namespace WebCore 105 106 #endif // ENABLE(IMAGE_RESIZER) 107 108 #endif // AsyncImageResizer_h 109