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 52class GrFmtPngReader : public GrFmtReader 53{ 54public: 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 64protected: 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 74class GrFmtPngWriter : public GrFmtWriter 75{ 76public: 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 ); 84protected: 85}; 86 87 88// PNG filter factory 89class GrFmtPng : public GrFmtFilterFactory 90{ 91public: 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