/*************************************************************************** png.h PNG file management. **************************************************************************** Copyright Aaron Giles All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name 'MAME' nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ***************************************************************************/ #pragma once #ifndef __PNG_H__ #define __PNG_H__ #include "osdcore.h" #include "bitmap.h" #include "corefile.h" /*************************************************************************** CONSTANTS ***************************************************************************/ #define PNG_Signature "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A" #define MNG_Signature "\x8A\x4D\x4E\x47\x0D\x0A\x1A\x0A" /* Chunk names */ #define PNG_CN_IHDR 0x49484452L #define PNG_CN_PLTE 0x504C5445L #define PNG_CN_IDAT 0x49444154L #define PNG_CN_IEND 0x49454E44L #define PNG_CN_gAMA 0x67414D41L #define PNG_CN_sBIT 0x73424954L #define PNG_CN_cHRM 0x6348524DL #define PNG_CN_tRNS 0x74524E53L #define PNG_CN_bKGD 0x624B4744L #define PNG_CN_hIST 0x68495354L #define PNG_CN_tEXt 0x74455874L #define PNG_CN_zTXt 0x7A545874L #define PNG_CN_pHYs 0x70485973L #define PNG_CN_oFFs 0x6F464673L #define PNG_CN_tIME 0x74494D45L #define PNG_CN_sCAL 0x7343414CL /* MNG Chunk names */ #define MNG_CN_MHDR 0x4D484452L #define MNG_CN_MEND 0x4D454E44L #define MNG_CN_TERM 0x5445524DL #define MNG_CN_BACK 0x4241434BL /* Prediction filters */ #define PNG_PF_None 0 #define PNG_PF_Sub 1 #define PNG_PF_Up 2 #define PNG_PF_Average 3 #define PNG_PF_Paeth 4 /* Error types */ enum png_error { PNGERR_NONE, PNGERR_OUT_OF_MEMORY, PNGERR_UNKNOWN_FILTER, PNGERR_FILE_ERROR, PNGERR_BAD_SIGNATURE, PNGERR_DECOMPRESS_ERROR, PNGERR_FILE_TRUNCATED, PNGERR_FILE_CORRUPT, PNGERR_UNKNOWN_CHUNK, PNGERR_COMPRESS_ERROR, PNGERR_UNSUPPORTED_FORMAT }; /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ struct png_text { png_text * next; const char * keyword; /* this is allocated */ const char * text; /* this points to a part of keyword */ }; struct png_info { UINT8 * image; UINT32 width, height; UINT32 xres, yres; rectangle screen; double xscale, yscale; double source_gamma; UINT32 resolution_unit; UINT8 bit_depth; UINT8 color_type; UINT8 compression_method; UINT8 filter_method; UINT8 interlace_method; UINT8 * palette; UINT32 num_palette; UINT8 * trans; UINT32 num_trans; png_text * textlist; }; /*************************************************************************** FUNCTION PROTOTYPES ***************************************************************************/ void png_free(png_info *pnginfo); png_error png_read_file(core_file *fp, png_info *pnginfo); png_error png_read_bitmap(core_file *fp, bitmap_argb32 &bitmap); png_error png_expand_buffer_8bit(png_info *p); png_error png_add_text(png_info *pnginfo, const char *keyword, const char *text); png_error png_write_bitmap(core_file *fp, png_info *info, bitmap_t &bitmap, int palette_length, const UINT32 *palette); png_error mng_capture_start(core_file *fp, bitmap_t &bitmap, double rate); png_error mng_capture_frame(core_file *fp, png_info *info, bitmap_t &bitmap, int palette_length, const UINT32 *palette); png_error mng_capture_stop(core_file *fp); #endif /* __PNG_H__ */