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00001 /******************************************************************************** 00002 * * 00003 * G I F I m a g e O b j e c t * 00004 * * 00005 ********************************************************************************* 00006 * Copyright (C) 1998,2009 by Jeroen van der Zijp. All Rights Reserved. * 00007 ********************************************************************************* 00008 * This library is free software; you can redistribute it and/or modify * 00009 * it under the terms of the GNU Lesser General Public License as published by * 00010 * the Free Software Foundation; either version 3 of the License, or * 00011 * (at your option) any later version. * 00012 * * 00013 * This library is distributed in the hope that it will be useful, * 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00016 * GNU Lesser General Public License for more details. * 00017 * * 00018 * You should have received a copy of the GNU Lesser General Public License * 00019 * along with this program. If not, see <http://www.gnu.org/licenses/> * 00020 ********************************************************************************* 00021 * $Id: FXGIFImage.h,v 1.30 2009/01/06 13:07:24 fox Exp $ * 00022 ********************************************************************************/ 00023 #ifndef FXGIFIMAGE_H 00024 #define FXGIFIMAGE_H 00025 00026 #ifndef FXIMAGE_H 00027 #include "FXImage.h" 00028 #endif 00029 00030 namespace FX { 00031 00032 /// GIF Image class 00033 class FXAPI FXGIFImage : public FXImage { 00034 FXDECLARE(FXGIFImage) 00035 protected: 00036 FXGIFImage(){} 00037 private: 00038 FXGIFImage(const FXGIFImage&); 00039 FXGIFImage &operator=(const FXGIFImage&); 00040 public: 00041 static const FXchar fileExt[]; 00042 static const FXchar mimeType[]; 00043 public: 00044 00045 /// Construct an image from memory stream formatted as CompuServe GIF format 00046 FXGIFImage(FXApp* a,const void *pix=NULL,FXuint opts=0,FXint w=1,FXint h=1); 00047 00048 /// Save pixels into stream in [un]GIF format 00049 virtual FXbool savePixels(FXStream& store) const; 00050 00051 /// Load pixels from stream in CompuServe GIF format 00052 virtual FXbool loadPixels(FXStream& store); 00053 00054 /// Destroy 00055 virtual ~FXGIFImage(); 00056 }; 00057 00058 00059 #ifndef FXLOADGIF 00060 #define FXLOADGIF 00061 00062 /** 00063 * Check if stream contains a GIF, return true if so. 00064 */ 00065 extern FXAPI FXbool fxcheckGIF(FXStream& store); 00066 00067 00068 /** 00069 * Load an GIF (Graphics Interchange Format) file from a stream; if the flag 00070 * flag is true, the background color is considered transparent. Upon successful return, 00071 * the pixel array and size are returned. If an error occurred, the pixel array is set to NULL. 00072 */ 00073 extern FXAPI FXbool fxloadGIF(FXStream& store,FXColor*& data,FXint& width,FXint& height,FXbool flag=true); 00074 00075 00076 /** 00077 * Save an GIF (Graphics Interchange Format) file to a stream. If flag 00078 * is true, the faster Floyd-Steinberg dither method instead of the slower Wu 00079 * quantization algorithm. 00080 */ 00081 extern FXAPI FXbool fxsaveGIF(FXStream& store,const FXColor *data,FXint width,FXint height,FXbool flag=true); 00082 00083 #endif 00084 00085 } 00086 00087 #endif
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