www.pudn.com > ncdzsrc.rar > png.h

#ifndef MAME_PNG_H 
#define MAME_PNG_H 
 
 
#define PNG_Signature       "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A" 
#define MNG_Signature       "\x8A\x4D\x4E\x47\x0D\x0A\x1A\x0A" 
 
#define PNG_CN_IHDR 0x49484452L     /* Chunk names */ 
#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 
 
#define PNG_PF_None     0   /* Prediction filters */ 
#define PNG_PF_Sub      1 
#define PNG_PF_Up       2 
#define PNG_PF_Average  3 
#define PNG_PF_Paeth    4 
 
#define MNG_CN_MHDR 0x4D484452L     /* MNG Chunk names */ 
#define MNG_CN_MEND 0x4D454E44L 
#define MNG_CN_TERM 0x5445524DL 
#define MNG_CN_BACK 0x4241434BL 
 
 
/* PNG support */ 
struct png_info { 
	UINT32 width, height; 
	UINT32 xres, yres; 
	struct rectangle screen; 
	double xscale, yscale; 
	double source_gamma; 
	UINT32 chromaticities[8]; 
	UINT32 resolution_unit, offset_unit, scale_unit; 
	UINT8 bit_depth; 
	UINT32 significant_bits[4]; 
	UINT32 background_color[4]; 
	UINT8 color_type; 
	UINT8 compression_method; 
	UINT8 filter_method; 
	UINT8 interlace_method; 
	UINT32 num_palette; 
	UINT8 *palette; 
	UINT32 num_trans; 
	UINT8 *trans; 
	UINT8 *image; 
 
	/* The rest is private and should not be used 
	 * by the public functions 
	 */ 
	UINT8 bpp; 
	UINT32 rowbytes; 
	UINT8 *zimage; 
	UINT32 zlength; 
	UINT8 *fimage; 
}; 
 
int png_verify_signature (FILE *fp); 
int png_add_text (const char *keyword, const char *text); 
int png_filter(struct png_info *p); 
int png_deflate_image(struct png_info *p); 
int png_write_sig(FILE *fp); 
int png_write_datastream(FILE *fp, struct png_info *p); 
int png_write_bitmap(FILE *fp, struct osd_bitmap *bitmap); 
#endif