00001 /* 00002 Copyright (c) 2002-2011 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 00003 00004 Redistribution and use in source and binary forms, with or without 00005 modification, are permitted provided that the following conditions are met: 00006 00007 * Redistributions of source code must retain the above copyright notice, this 00008 list of conditions and the following disclaimer. 00009 * Redistributions in binary form must reproduce the above copyright notice, 00010 this list of conditions and the following disclaimer in the documentation 00011 and/or other materials provided with the distribution. 00012 * Neither the name of Nokia Corporation nor the names of its contributors 00013 may be used to endorse or promote products derived from this software 00014 without specific prior written permission. 00015 00016 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00017 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00018 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00019 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 00020 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00021 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 00022 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 00023 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00024 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00025 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00026 00027 Description: 00028 */ 00029 00030 #ifndef __IMAGE_READER_H__ 00031 #define __IMAGE_READER_H__ 00032 00033 #include <ImageConversion.h> 00034 #include <COEMAIN.H> 00035 #include <APGCLI.H> 00036 00037 class MImageReaderCallBack 00038 {// this callback function is used for informing the UI container 00039 // that the image is now ready to be drawn 00040 // (or error indicating failure to open the file) 00041 public: 00042 virtual void ImageReadDoneL(TInt aError) = 0; 00043 }; 00044 00045 class CImage_Reader : public CActive 00046 { 00047 public:// public constructors & destructors 00048 static CImage_Reader* NewL(MImageReaderCallBack& aCallBack,const TDesC& aFileName); 00049 static CImage_Reader* NewLC(MImageReaderCallBack& aCallBack,const TDesC& aFileName); 00050 ~CImage_Reader(); 00051 // a public function for accessing the bitmap image 00052 CFbsBitmap* Bitmap(void){ return iFrameImg;}; 00053 protected:// active object functions 00054 void DoCancel(); 00055 void RunL(); 00056 private:// used internally to check the file's MIME type 00057 TInt GetFileType(const TDesC& aFileName, TDes8& aFileType); 00058 // private constructors 00059 CImage_Reader(MImageReaderCallBack& aCallBack); 00060 void ConstructL(const TDesC& aFileName); 00061 private:// private member variables 00062 MImageReaderCallBack& iCallBack; 00063 CImageDecoder* iImageDecoder; 00064 CFbsBitmap* iFrameImg; 00065 RFs iFsSession; 00066 }; 00067 00068 00069 #endif // __IMAGE_READER_H__ 00070
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