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mmsgifloader.h

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00001 /***************************************************************************
00002  *   Copyright (C) 2005-2007 Stefan Schwarzer, Jens Schneider,             *
00003  *                           Matthias Hardt, Guido Madaus                  *
00004  *                                                                         *
00005  *   Copyright (C) 2007-2008 BerLinux Solutions GbR                        *
00006  *                           Stefan Schwarzer & Guido Madaus               *
00007  *                                                                         *
00008  *   Copyright (C) 2009-2013 BerLinux Solutions GmbH                       *
00009  *                                                                         *
00010  *   Authors:                                                              *
00011  *      Stefan Schwarzer   <stefan.schwarzer@diskohq.org>,                 *
00012  *      Matthias Hardt     <matthias.hardt@diskohq.org>,                   *
00013  *      Jens Schneider     <jens.schneider@diskohq.org>,                   *
00014  *      Guido Madaus       <guido.madaus@diskohq.org>,                     *
00015  *      Patrick Helterhoff <patrick.helterhoff@diskohq.org>,               *
00016  *      René Bählkow       <rene.baehlkow@diskohq.org>                     *
00017  *                                                                         *
00018  *   This library is free software; you can redistribute it and/or         *
00019  *   modify it under the terms of the GNU Lesser General Public            *
00020  *   License version 2.1 as published by the Free Software Foundation.     *
00021  *                                                                         *
00022  *   This library is distributed in the hope that it will be useful,       *
00023  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00024  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
00025  *   Lesser General Public License for more details.                       *
00026  *                                                                         *
00027  *   You should have received a copy of the GNU Lesser General Public      *
00028  *   License along with this library; if not, write to the                 *
00029  *   Free Software Foundation, Inc.,                                       *
00030  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
00031  **************************************************************************/
00032 
00033 #ifndef MMSGIFLOADER_H_
00034 #define MMSGIFLOADER_H_
00035 
00036 #include "mmsgui/mmsimagemanager.h"
00037 #include <sigc++/sigc++.h>
00038 
00039 class MMSGIFLoader : public MMSThread {
00040     private:
00041         //GIF: header
00042         typedef struct {
00043             char signature[3+1];
00044             char version[3+1];
00045         } MMS_GIF_HEADER;
00046 
00047         //GIF: logical screen descriptor
00048         typedef struct {
00049             unsigned short  width;
00050             unsigned short  height;
00051             unsigned char   flags;
00052             unsigned char   bgcolor;
00053             unsigned char   ratio;
00054             bool            global_color_table;
00055         } MMS_GIF_LSD;
00056 
00057         //GIF: color table
00058         typedef struct {
00059             unsigned short  size;
00060             unsigned char   table[3*256];
00061         } MMS_GIF_CT;
00062 
00063         //GIF: graphic control extension
00064         typedef struct {
00065             unsigned char   flags;
00066             unsigned short  delaytime;
00067             unsigned char   transcolor;
00068             bool            transparent_color;
00069             unsigned char   disposal;
00070         } MMS_GIF_GCE;
00071 
00072         //GIF: image descriptor
00073         typedef struct {
00074             unsigned short  x;
00075             unsigned short  y;
00076             unsigned short  w;
00077             unsigned short  h;
00078             unsigned char   flags;
00079             bool            local_color_table;
00080             bool            interlaced;
00081         } MMS_GIF_ID;
00082 
00083         //name of gif file
00084         MMSIM_DESC *desc;
00085 
00086         //display layer
00087         MMSFBLayer *layer;
00088 
00089         //file pointer
00090         MMSFile     *myfile;
00091 
00092         //gif data
00093         MMS_GIF_HEADER  gif_header;
00094         MMS_GIF_LSD     gif_lsd;
00095         MMS_GIF_CT      gif_gct;
00096 
00097         pthread_cond_t  cond;
00098         pthread_mutex_t mutex;
00099 
00100         bool loadHeader();
00101         bool loadBlocks();
00102 
00103         void threadMain();
00104 
00105     public:
00106         MMSGIFLoader(MMSIM_DESC      *desc,
00107                      MMSFBLayer      *layer);
00108 
00109         void block();
00110 };
00111 
00112 bool isGIF(string file);
00113 
00114 #endif /*MMSGIFLOADER_H_*/

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