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FXGIFIcon.h

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00001 /********************************************************************************
00002 *                                                                               *
00003 *                        G I F   I c o n   O b j e c t                          *
00004 *                                                                               *
00005 *********************************************************************************
00006 * Copyright (C) 1997,2009 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: FXGIFIcon.h,v 1.31 2009/01/06 13:07:24 fox Exp $                         *
00022 ********************************************************************************/
00023 #ifndef FXGIFICON_H
00024 #define FXGIFICON_H
00025 
00026 #ifndef FXICON_H
00027 #include "FXIcon.h"
00028 #endif
00029 
00030 namespace FX {
00031 
00032 /// GIF Icon class
00033 class FXAPI FXGIFIcon : public FXIcon {
00034   FXDECLARE(FXGIFIcon)
00035 protected:
00036   FXGIFIcon(){}
00037 private:
00038   FXGIFIcon(const FXGIFIcon&);
00039   FXGIFIcon &operator=(const FXGIFIcon&);
00040 public:
00041   static const FXchar fileExt[];
00042   static const FXchar mimeType[];
00043 public:
00044 
00045   /// Construct an icon from memory stream formatted as GIF format
00046   FXGIFIcon(FXApp* a,const void *pix=NULL,FXColor clr=FXRGB(192,192,192),FXuint opts=0,FXint w=1,FXint h=1);
00047 
00048   /// Save pixels into stream in GIF format
00049   virtual FXbool savePixels(FXStream& store) const;
00050 
00051   /// Load pixels from stream in GIF format
00052   virtual FXbool loadPixels(FXStream& store);
00053 
00054   /// Destroy
00055   virtual ~FXGIFIcon();
00056   };
00057 
00058 
00059 
00060 #ifndef FXLOADGIF
00061 #define FXLOADGIF
00062 
00063 /**
00064 * Check if stream contains a GIF, return true if so.
00065 */
00066 extern FXAPI FXbool fxcheckGIF(FXStream& store);
00067 
00068 
00069 /**
00070 * Load an GIF (Graphics Interchange Format) file from a stream; if the flag
00071 * flag is true, the background color is considered transparent.  Upon successful return,
00072 * the pixel array and size are returned.  If an error occurred, the pixel array is set to NULL.
00073 */
00074 extern FXAPI FXbool fxloadGIF(FXStream& store,FXColor*& data,FXint& width,FXint& height,FXbool flag=true);
00075 
00076 
00077 /**
00078 * Save an GIF (Graphics Interchange Format) file to a stream.  If flag
00079 * is true, the faster Floyd-Steinberg dither method instead of the slower Wu
00080 * quantization algorithm.
00081 */
00082 extern FXAPI FXbool fxsaveGIF(FXStream& store,const FXColor *data,FXint width,FXint height,FXbool flag=true);
00083 
00084 #endif
00085 
00086 }
00087 
00088 #endif

Copyright © 1997-2009 Jeroen van der Zijp