1 /*M/////////////////////////////////////////////////////////////////////////////////////// 2 // 3 // IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. 4 // 5 // By downloading, copying, installing or using the software you agree to this license. 6 // If you do not agree to this license, do not download, install, 7 // copy or use the software. 8 // 9 // 10 // Intel License Agreement 11 // For Open Source Computer Vision Library 12 // 13 // Copyright (C) 2000, Intel Corporation, all rights reserved. 14 // Third party copyrights are property of their respective owners. 15 // 16 // Redistribution and use in source and binary forms, with or without modification, 17 // are permitted provided that the following conditions are met: 18 // 19 // * Redistribution's of source code must retain the above copyright notice, 20 // this list of conditions and the following disclaimer. 21 // 22 // * Redistribution's in binary form must reproduce the above copyright notice, 23 // this list of conditions and the following disclaimer in the documentation 24 // and/or other materials provided with the distribution. 25 // 26 // * The name of Intel Corporation may not be used to endorse or promote products 27 // derived from this software without specific prior written permission. 28 // 29 // This software is provided by the copyright holders and contributors "as is" and 30 // any express or implied warranties, including, but not limited to, the implied 31 // warranties of merchantability and fitness for a particular purpose are disclaimed. 32 // In no event shall the Intel Corporation or contributors be liable for any direct, 33 // indirect, incidental, special, exemplary, or consequential damages 34 // (including, but not limited to, procurement of substitute goods or services; 35 // loss of use, data, or profits; or business interruption) however caused 36 // and on any theory of liability, whether in contract, strict liability, 37 // or tort (including negligence or otherwise) arising in any way out of 38 // the use of this software, even if advised of the possibility of such damage. 39 // 40 //M*/ 41 42 #ifndef _GRFMT_PNG_H_ 43 #define _GRFMT_PNG_H_ 44 45 #ifdef HAVE_PNG 46 47 #include "grfmt_base.h" 48 #include "bitstrm.h" 49 50 /* libpng version only */ 51 52 class GrFmtPngReader : public GrFmtReader 53 { 54 public: 55 56 GrFmtPngReader( const char* filename ); 57 ~GrFmtPngReader(); 58 59 bool CheckFormat( const char* signature ); 60 bool ReadData( uchar* data, int step, int color ); 61 bool ReadHeader(); 62 void Close(); 63 64 protected: 65 66 void* m_png_ptr; // pointer to decompression structure 67 void* m_info_ptr; // pointer to image information structure 68 void* m_end_info; // pointer to one more image information structure 69 FILE* m_f; 70 int m_color_type; 71 }; 72 73 74 class GrFmtPngWriter : public GrFmtWriter 75 { 76 public: 77 78 GrFmtPngWriter( const char* filename ); 79 ~GrFmtPngWriter(); 80 81 bool IsFormatSupported( int depth ); 82 bool WriteImage( const uchar* data, int step, 83 int width, int height, int depth, int channels ); 84 protected: 85 }; 86 87 88 // PNG filter factory 89 class GrFmtPng : public GrFmtFilterFactory 90 { 91 public: 92 93 GrFmtPng(); 94 ~GrFmtPng(); 95 96 GrFmtReader* NewReader( const char* filename ); 97 GrFmtWriter* NewWriter( const char* filename ); 98 bool CheckSignature( const char* signature ); 99 }; 100 101 #endif 102 103 #endif/*_GRFMT_PNG_H_*/ 104