00001 00005 /* 00006 * Author: Steven Ludtke, 04/10/2003 (sludtke@bcm.edu) 00007 * Copyright (c) 2000-2006 Baylor College of Medicine 00008 * 00009 * This software is issued under a joint BSD/GNU license. You may use the 00010 * source code in this file under either license. However, note that the 00011 * complete EMAN2 and SPARX software packages have some GPL dependencies, 00012 * so you are responsible for compliance with the licenses of these packages 00013 * if you opt to use BSD licensing. The warranty disclaimer below holds 00014 * in either instance. 00015 * 00016 * This complete copyright notice must be included in any revised version of the 00017 * source code. Additional authorship citations may be added, but existing 00018 * author citations must be preserved. 00019 * 00020 * This program is free software; you can redistribute it and/or modify 00021 * it under the terms of the GNU General Public License as published by 00022 * the Free Software Foundation; either version 2 of the License, or 00023 * (at your option) any later version. 00024 * 00025 * This program is distributed in the hope that it will be useful, 00026 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00027 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00028 * GNU General Public License for more details. 00029 * 00030 * You should have received a copy of the GNU General Public License 00031 * along with this program; if not, write to the Free Software 00032 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00033 * 00034 * */ 00035 00036 #ifndef eman__pngio_h__ 00037 #define eman__pngio_h__ 1 00038 00039 #ifdef EM_PNG 00040 00041 #include <png.h> 00042 #include "imageio.h" 00043 00044 00045 namespace EMAN 00046 { 00050 class PngIO:public ImageIO 00051 { 00052 public: 00053 explicit PngIO(const string & filename, IOMode rw_mode = READ_ONLY); 00054 ~PngIO(); 00055 00056 DEFINE_IMAGEIO_FUNC; 00057 static bool is_valid(const void *first_block); 00058 00059 private: 00060 enum 00061 { 00062 PNG_BYTES_TO_CHECK = 8 00063 }; 00064 00065 enum BitDepthType 00066 { 00067 PNG_CHAR_DEPTH, 00068 PNG_SHORT_DEPTH, 00069 PNG_INVALID_DEPTH 00070 }; 00071 00072 private: 00073 string filename; 00074 IOMode rw_mode; 00075 FILE *png_file; 00076 00077 bool initialized; 00078 00079 png_structp png_ptr; 00080 png_infop info_ptr; 00081 png_infop end_info; 00082 00083 png_uint_32 nx; 00084 png_uint_32 ny; 00085 BitDepthType depth_type; 00086 int number_passes; 00087 00088 float rendermin; 00089 float rendermax; 00090 }; 00091 00092 } 00093 00094 #endif //EM_PNG 00095 00096 #endif //eman__pngio_h__