223 lines
7.0 KiB
Plaintext
223 lines
7.0 KiB
Plaintext
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#------------------------------------------------------------------------------
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# images: file(1) magic for image formats (see also "c-lang" for XPM bitmaps)
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#
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# originally from jef@helios.ee.lbl.gov (Jef Poskanzer),
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# additions by janl@ifi.uio.no as well as others. Jan also suggested
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# merging several one- and two-line files into here.
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#
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# XXX - byte order for GIF and TIFF fields?
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# [GRR: TIFF allows both byte orders; GIF is little-endian]
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#
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# [GRR: what the hell is this doing in here?]
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0 string xbtoa btoa'd file
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# PBMPLUS
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0 string P1 PBM file
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0 string P2 PGM file
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0 string P3 PPM file
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0 string P4 PBM "rawbits" file
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0 string P5 PGM "rawbits" file
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0 string P6 PPM "rawbits" file
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# NIFF (Navy Interchange File Format, a modification of TIFF) images
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# this *must* go before TIFF
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0 string IIN1 NIFF raster data
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# TIFF images
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0 string MM TIFF file, big-endian
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>2 beshort >0 - version %d
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0 string II TIFF file, little-endian
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>2 leshort >0 - version %d
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# PNG [Portable Network Graphics, or "PNG's Not GIF"] images
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# (Greg Roelofs, newt@uchicago.edu)
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#
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# 137 P N G \r \n ^Z \n [4-byte length] H E A D [HEAD data] [HEAD crc] ...
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#
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0 string \x89PNG PNG image,
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>4 belong !0x0d0a1a0a CORRUPTED,
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>16 belong x %ld x
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>20 belong x %ld,
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>24 byte x %d-bit
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>25 byte 0 grayscale,
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>25 byte 2 \b/color RGB,
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>25 byte 3 colormap,
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>25 byte 4 gray+alpha,
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>25 byte 6 \b/color RGBA,
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#>26 byte 0 deflate/32K,
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>28 byte 0 non-interlaced
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>28 byte 1 interlaced
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# GIF
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0 string GIF GIF image
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>3 string 87a - version %s,
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>3 string 89a - version %s,
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>6 leshort >0 %hd x
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>8 leshort >0 %hd,
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#>10 byte &0x80 color mapped,
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# GRR 950330: the following is not accurate for most GIFs:
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#>10 byte &0x40 interlaced,
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>10 byte&0x07 =0x00 2 colors
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>10 byte&0x07 =0x01 4 colors
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>10 byte&0x07 =0x02 8 colors
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>10 byte&0x07 =0x03 16 colors
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>10 byte&0x07 =0x04 32 colors
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>10 byte&0x07 =0x05 64 colors
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>10 byte&0x07 =0x06 128 colors
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>10 byte&0x07 =0x07 256 colors
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# Miscellany
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0 long 1123028772 Artisan image file
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>4 long 1 rectangular 24-bit image
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>4 long 2 rectangular 8-bit image with colormap
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>4 long 3 rectangular 32-bit image (24-bit with matte)
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0 string \361\0\100\273 CMU window manager bitmap
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0 string #FIG FIG graphics savefile text
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>6 string 2.1 Version 2.1
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>6 string 2.0 Version 2.0
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0 string GKSM GKS Metafile
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8 string ILBM IFF ILBM file
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0 string ARF_BEGARF PHIGS clear text archive
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# More miscellany from Daniel Quinlan (quinlan@yggdrasil.com)
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0 string This\ is\ a\ BitMap\ file Lisp Machine bit-array-file
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0 string !! Bennet Yee's "face" format
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0 string @(#)SunPHIGS SunPHIGS
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# version number follows, in the form m.n
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>40 string SunBin binary
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>32 string archive archive
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0 string BEGMF clear text Computer Graphics Metafile
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# these should be beshort, but not sure
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0 beshort&0xffe0 0x0020 binary Computer Graphics Metafile
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0 beshort 0x3020 character Computer Graphics Metafile
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# From: <u31b3hs@pool.informatik.rwth-aachen.de> (Michael Haardt)
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0 string yz MGR bitmap, modern format, 8 bit aligned
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0 string zz MGR bitmap, old format, 1 bit deep, 16 bit aligned
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0 string xz MGR bitmap, old format, 1 bit deep, 32 bit aligned
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0 string yx MGR bitmap, modern format, squeezed
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0 string %bitmap FBM pixmap
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>30 long 0x31 (mono)
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>30 long 0x33 (color)
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4 string Research, Digifax-G3-File
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>29 byte 1 , fine resolution
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>29 byte 0 , normal resolution
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# JPEG images
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0 beshort 0xffd8 JPEG image
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>6 string JFIF - JFIF standard
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# from cameron@cs.unsw.oz.au (Cameron Simpson):
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0 string hsi1 JPEG image - HSI encoded (proprietary)
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# PC bitmaps (OS/2, Windoze BMP files) (Greg Roelofs, newt@uchicago.edu)
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0 string BM bitmap
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>14 byte 12 (OS/2 1.x format)
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>14 byte 64 (OS/2 2.x format)
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>14 byte 40 (Windows 3.x format)
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0 string IC icon
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0 string PI pointer
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0 string CI color icon
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0 string CP color pointer
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0 string BA bitmap array
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# Utah Raster Toolkit RLE images (two versions)
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#
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# From <janl@ifi.uio.no>
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# I made this with the help of the man page for rle(5). Ihey missing
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# from the magic numbers I have:
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0 beshort 0xcc52 Utah Raster Toolkit RLE
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>2 beshort >0 lower left corner: %d
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>4 beshort >0 lower right corner: %d
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>6 beshort >0 %d x
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>8 beshort >0 %d
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>10 byte&0x1 =0x1 CLEARFIRST
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>10 byte&0x2 =0x2 NO_BACKGROUND
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>10 byte&0x4 =0x4 ALPHA
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>10 byte&0x8 =0x8 COMMENT
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>11 byte >0 %d colour channels
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>12 byte >0 %d bits per pixel
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>13 byte >0 %d colour map channels
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#
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# RLE images (Disaster prone simpleton, m91dps@ecs.ox.ac.uk)
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# Here's a magic file entry for rle images. 24-bit images tend to produce
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# foo.rle size 42x42, 3 comps each 8 bits
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# (for arbitary, prossibly different values of 42).
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# freely redistribuable under the GPL
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# [GRR: which endianness? big?]
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0 short 0xcc55 RLE image data
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>6 short >0 %d x
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>8 short >0 %d,
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>2 short >0 x offset by %d,
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>4 short >0 y offset by %d,
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>11 byte =0 colour map
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>11 byte >1 %d comps each
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>12 byte =1 1 bit
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>12 byte >1 %d bits
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# FBM images, culled from xli source (d. p. simpleton, m91dps@ecs.ox.ac.uk)
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0 string %bitmap fbm image data
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# image file format (Robert Potter, potter@cs.rochester.edu)
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0 string Imagefile\ version- iff image data
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# this adds the whole header (inc. version number), informative but longish
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>10 string >\0 %s
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# Sun rasterfiles, from Daniel Quinlan (quinlan@yggdrasil.com)
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#
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# XXX - Does the Sun 386i use the same byte order?
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#
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0 belong 0x59a66a95 Sun raster image
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>4 belong >0 %d x
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>8 belong >0 %d,
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>12 belong >0 %d-bit,
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# this is almost the same as the file length (what about compressed?)
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#>16 belong >0 %d bytes long,
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>20 belong 0 old format,
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# no need to complain if it is standard
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#>20 belong 1 standard,
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>20 belong 2 compressed,
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>20 belong 3 RGB,
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>20 belong 4 TIFF,
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>20 belong 5 IFF,
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>20 belong 0xffff reserved for testing,
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>24 belong 0 no colormap
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>24 belong 1 RGB colormap
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>24 belong 2 raw colormap
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# this doesn't impart much useful information (or does it?)
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#>28 belong >0 colormap is %d bytes long
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# Daniel Quinlan (quinlan@yggdrasil.com) -- from an SGI machine
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# There may be a byte swapped version of SGI imagelib images, but
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# I haven't seen any evidence of programs that support it.
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0 beshort 000732 SGI imagelib image
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>6 beshort x \b, %d x
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>8 beshort x %d
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#
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0 string IT01 FIT image file
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>4 belong x \b, %d x
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>8 belong x %d x
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>12 belong x %d
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#
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0 string IT02 FIT image file
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>4 belong x \b, %d x
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>8 belong x %d x
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>12 belong x %d
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#
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2048 string PCD_IPI Kodak Photo CD image pack file
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0 string PCD_OPA Kodak Photo CD overview pack file
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# Jeff Uphoff <juphoff@tarsier.cv.nrao.edu>
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# FITS is the Flexible Image Transport System, the de facto standard for
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# data and image transfer, storage, etc., for the astronomical community.
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# FITS format.
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0 string SIMPLE\ \ = FITS
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>107 string -32 32 bits per pixel, IEEE big endian float
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>107 string \ 32 32 bits per pixel, unsigned integer
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>108 string 16 16 bits per pixel, unsigned integer
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>109 string 8 8 bits per pixel, unsigned integer
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