GFXprim

File signatures

File signature is a short well defined sequence of bytes usually situated at the beginning of the file.

Table 1. Table of image file signatures used by GFXprim loaders
Extension	Format Name	Signature	Signature in Hex
JPEG			`0xff 0xd8 0xff`
PNG	Portable Network Graphics	`\211PNG\r\n\032\n`	`89 50 4e 47 0d 0a 1a 0a`
GIF	Graphics Interchange Format	`GIF87a or GIF89a`
BMP		`BM`	`42 4d`
TIFF	Tagged Image File Format	`II\0 or MM\0`	`49 49 2a 00 or 4d 4d 2a 00`
PSP	Paint Shop Pro Image	`Paint Shop Pro Image File\n\x1a\0\0\0\0\0\0\0\0`
PSD	Adobe Photoshop Image	`8BPS\0\x01`
PBM	Netpbm portable bitmap	`P1 or P4`
PGM	Netpbm portable graymap	`P2 or P5`
PPM	Netpbm portable pixmap	`P3 or P6`
PNM	Netpbm portable anymap	`P1, P2, P3, P4, P5, P6`
JP2	JPEG 2000	`\0\0\0\x0cjP\x20\x20\x0d\x0a\x87\x0a`	`00 00 00 0c 6a 50 20 20 0d 0a 87 0a`
PCX	ZSoft PCX		`0a [01-05] 0x01 {01, 02, 04, 08}`
CBZ	Comic Book Archive (ZIP)	`PK\03\04`