ximapng.h
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- /*
- * File: ximapng.h
- * Purpose: PNG Image Class Loader and Writer
- */
- /* === C R E D I T S & D I S C L A I M E R S ==============
- * CxImagePNG (c) 07/Aug/2001 <ing.davide.pizzolato@libero.it>
- * Permission is given by the author to freely redistribute and include
- * this code in any program as long as this credit is given where due.
- *
- * CxImage version 5.00 23/Aug/2002
- * See the file history.htm for the complete bugfix and news report.
- *
- * Special thanks to Troels Knakkergaard for new features, enhancements and bugfixes
- *
- * original CImagePNG and CImageIterator implementation are:
- * Copyright: (c) 1995, Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
- *
- * libpng version 1.2.1 - December 12, 2001
- * Copyright (c) 1998-2001 Glenn Randers-Pehrson
- *
- * COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
- * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
- * THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
- * OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
- * CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
- * THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
- * SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
- * PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
- * THIS DISCLAIMER.
- *
- * Use at your own risk!
- * ==========================================================
- */
- #if !defined(__ximaPNG_h)
- #define __ximaPNG_h
- #include "ximage.h"
- #if CXIMAGE_SUPPORT_PNG
- extern "C" {
- #include "../png/png.h"
- }
- class CxImagePNG: public CxImage
- {
- public:
- CxImagePNG(): CxImage(CXIMAGE_FORMAT_PNG) {}
- // bool Load(const char * imageFileName){ return CxImage::Load(imageFileName,CXIMAGE_FORMAT_PNG);}
- // bool Save(const char * imageFileName){ return CxImage::Save(imageFileName,CXIMAGE_FORMAT_PNG);}
- bool Decode(CxFile * hFile);
- bool Encode(CxFile * hFile);
- bool Decode(FILE *hFile) { CxIOFile file(hFile); return Decode(&file); }
- bool Encode(FILE *hFile) { CxIOFile file(hFile); return Encode(&file); }
- protected:
- void ima_png_error(png_struct *png_ptr, char *message);
- void expand2to4bpp(BYTE* prow);
- static void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
- {
- CxFile* hFile = (CxFile*)png_ptr->io_ptr;
- if (hFile->Read(data,1,length) != length) png_error(png_ptr, "Read Error");
- }
- static void user_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
- {
- CxFile* hFile = (CxFile*)png_ptr->io_ptr;
- if (hFile->Write(data,1,length) != length) png_error(png_ptr, "Write Error");
- }
- static void user_flush_data(png_structp png_ptr)
- {
- CxFile* hFile = (CxFile*)png_ptr->io_ptr;
- if (!hFile->Flush()) png_error(png_ptr, "Flush Error");
- }
- static void user_error_fn(png_structp png_ptr,png_const_charp error_msg)
- {
- strncpy((char*)png_ptr->error_ptr,error_msg,255);
- longjmp(png_ptr->jmpbuf, 1);
- }
- };
- #endif
- #endif