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00001 /******************************************************************************** 00002 * * 00003 * G I F C u r so r O b j e c t * 00004 * * 00005 ********************************************************************************* 00006 * Copyright (C) 2000,2009 by Daniel Gehriger. 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: FXGIFCursor.h,v 1.29 2009/01/06 13:07:24 fox Exp $ * 00022 ********************************************************************************/ 00023 #ifndef FXGIFCURSOR_H 00024 #define FXGIFCURSOR_H 00025 00026 #ifndef FXCURSOR_H 00027 #include "FXCursor.h" 00028 #endif 00029 00030 namespace FX { 00031 00032 00033 /// GIF Cursor class 00034 class FXAPI FXGIFCursor : public FXCursor { 00035 FXDECLARE(FXGIFCursor) 00036 protected: 00037 FXGIFCursor(){} 00038 private: 00039 FXGIFCursor(const FXGIFCursor&); 00040 FXGIFCursor &operator=(const FXGIFCursor&); 00041 public: 00042 static const FXchar fileExt[]; 00043 public: 00044 00045 /** 00046 * Construct a cursor from memory stream in Compuserve GIF format. 00047 * Hot spot may be specified using hx and hy parameters, since the GIF 00048 * format does not specify a hot spot. The image must be smaller than 00049 * 32x32 pixels. 00050 */ 00051 FXGIFCursor(FXApp* a,const void* pix,FXint hx=0,FXint hy=0); 00052 00053 /// Save pixel data only, in GIF format 00054 virtual FXbool savePixels(FXStream& store) const; 00055 00056 /// Load pixel data only, in GIF format 00057 virtual FXbool loadPixels(FXStream& store); 00058 00059 /// Destroy 00060 virtual ~FXGIFCursor(){} 00061 }; 00062 00063 00064 #ifndef FXLOADGIF 00065 #define FXLOADGIF 00066 00067 /** 00068 * Check if stream contains a GIF, return true if so. 00069 */ 00070 extern FXAPI FXbool fxcheckGIF(FXStream& store); 00071 00072 00073 /** 00074 * Load an GIF (Graphics Interchange Format) file from a stream; if the flag 00075 * flag is true, the background color is considered transparent. Upon successful return, 00076 * the pixel array and size are returned. If an error occurred, the pixel array is set to NULL. 00077 */ 00078 extern FXAPI FXbool fxloadGIF(FXStream& store,FXColor*& data,FXint& width,FXint& height,FXbool flag=true); 00079 00080 00081 /** 00082 * Save an GIF (Graphics Interchange Format) file to a stream. If flag 00083 * is true, the faster Floyd-Steinberg dither method instead of the slower Wu 00084 * quantization algorithm. 00085 */ 00086 extern FXAPI FXbool fxsaveGIF(FXStream& store,const FXColor *data,FXint width,FXint height,FXbool flag=true); 00087 00088 #endif 00089 00090 } 00091 00092 #endif
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