file_cmds-60.tar.gz

[apple/file_cmds.git] / file / magdir / images

#------------------------------------------------------------------------------
# images:  file(1) magic for image formats (see also "iff")
#
# originally from jef@helios.ee.lbl.gov (Jef Poskanzer),
# additions by janl@ifi.uio.no as well as others. Jan also suggested
# merging several one- and two-line files into here.
#
# little magic: PCX (first byte is 0x0a)
# no magic: Targa

# PBMPLUS images
# The next byte following the magic is always whitespace.
0       string          P1              PBM image text
0       string          P2              PGM image text
0       string          P3              PPM image text
0       string          P4              PBM "rawbits" image data
0       string          P5              PGM "rawbits" image data
0       string          P6              PPM "rawbits" image data

# NIFF (Navy Interchange File Format, a modification of TIFF) images
0       string          IIN1            NIFF image data

# Tag Image File Format, from Daniel Quinlan (quinlan@yggdrasil.com)
# The second word of TIFF files is the TIFF version number, 42, which has
# never changed.  The TIFF specification recommends testing for it.
0       string          MM\x00\x2a      TIFF image data, big-endian
0       string          II\x2a\x00      TIFF image data, little-endian

# PNG [Portable Network Graphics, or "PNG's Not GIF"] images
# (Greg Roelofs, newt@uchicago.edu)
#
# 137 P N G \r \n ^Z \n [4-byte length] H E A D [HEAD data] [HEAD crc] ...
#
0       string          \x89PNG         PNG image data,
>4      belong          !0x0d0a1a0a     CORRUPTED,
>16     belong          x               %ld x
>20     belong          x               %ld,
>24     byte            x               %d-bit
>25     byte            0               grayscale,
>25     byte            2               \b/color RGB,
>25     byte            3               colormap,
>25     byte            4               gray+alpha,
>25     byte            6               \b/color RGBA,
#>26    byte            0               deflate/32K,
>28     byte            0               non-interlaced
>28     byte            1               interlaced

# GIF
0       string          GIF8            GIF image data
>4      string          7a              \b, version 8%s,
>4      string          9a              \b, version 8%s,
>6      leshort         >0              %hd x
>8      leshort         >0              %hd,
#>10    byte            &0x80           color mapped,
#>10    byte&0x07       =0x00           2 colors
#>10    byte&0x07       =0x01           4 colors
#>10    byte&0x07       =0x02           8 colors
#>10    byte&0x07       =0x03           16 colors
#>10    byte&0x07       =0x04           32 colors
#>10    byte&0x07       =0x05           64 colors
#>10    byte&0x07       =0x06           128 colors
#>10    byte&0x07       =0x07           256 colors

# ITC (CMU WM) raster files.  It is essentially a byte-reversed Sun raster,
# 1 plane, no encoding.
0       string          \361\0\100\273  CMU window manager raster image data
>4      lelong          >0              %d x
>8      lelong          >0              %d,
>12     lelong          >0              %d-bit

# Magick Image File Format
0       string          id=ImageMagick  MIFF image data

# Artisan
0       long            1123028772      Artisan image data
>4      long            1               \b, rectangular 24-bit
>4      long            2               \b, rectangular 8-bit with colormap
>4      long            3               \b, rectangular 32-bit (24-bit with matte)

# FIG (Facility for Interactive Generation of figures), an object-based format
0       string          #FIG            FIG image text
>5      string          x               \b, version %.3s

# PHIGS
0       string          ARF_BEGARF              PHIGS clear text archive
0       string          @(#)SunPHIGS            SunPHIGS
# version number follows, in the form m.n
>40     string          SunBin                  binary
>32     string          archive                 archive

# GKS (Graphics Kernel System)
0       string          GKSM            GKS Metafile
>24     string          SunGKS          \b, SunGKS

# CGM image files
0       string          BEGMF           clear text Computer Graphics Metafile
# XXX - questionable magic
0       beshort&0xffe0  0x0020          binary Computer Graphics Metafile
0       beshort         0x3020          character Computer Graphics Metafile

# MGR bitmaps  (Michael Haardt, u31b3hs@pool.informatik.rwth-aachen.de)
0       string  yz      MGR bitmap, modern format, 8-bit aligned
0       string  zz      MGR bitmap, old format, 1-bit deep, 16-bit aligned
0       string  xz      MGR bitmap, old format, 1-bit deep, 32-bit aligned
0       string  yx      MGR bitmap, modern format, squeezed

# Fuzzy Bitmap (FBM) images
0       string          %bitmap\0       FBM image data
>30     long            0x31            \b, mono
>30     long            0x33            \b, color

# facsimile data
1       string          PC\ Research,\ Inc      group 3 fax data
>29     byte            0               \b, normal resolution (204x98 DPI)
>29     byte            1               \b, fine resolution (204x196 DPI)

# JPEG images
# SunOS 5.5.1 had
#
#       0       string          \377\330\377\340        JPEG file
#       0       string          \377\330\377\356        JPG file
#
# both of which turn into "JPEG image data" here.
#
0       beshort         0xffd8          JPEG image data
>6      string          JFIF            \b, JFIF standard
# HSI is Handmade Software's proprietary JPEG encoding scheme
0       string          hsi1            JPEG image data, HSI proprietary

# PC bitmaps (OS/2, Windoze BMP files)  (Greg Roelofs, newt@uchicago.edu)
0       string          BM              PC bitmap data
>14     leshort         12              \b, OS/2 1.x format
>>18    leshort         x               \b, %d x
>>20    leshort         x               %d
>14     leshort         64              \b, OS/2 2.x format
>>18    leshort         x               \b, %d x
>>20    leshort         x               %d
>14     leshort         40              \b, Windows 3.x format
>>18    lelong          x               \b, %d x
>>22    lelong          x               %d x
>>28    leshort         x               %d
0       string          IC              PC icon data
0       string          PI              PC pointer image data
0       string          CI              PC color icon data
0       string          CP              PC color pointer image data
# Conflicts with other entries [BABYL]
#0      string          BA              PC bitmap array data

# XPM icons (Greg Roelofs, newt@uchicago.edu)
# note possible collision with C/REXX entry in c-lang; currently commented out
0       string          /*\ XPM\ */     X pixmap image text

# Utah Raster Toolkit RLE images (janl@ifi.uio.no)
0       leshort         0xcc52          RLE image data,
>6      leshort         x               %d x
>8      leshort         x               %d
>2      leshort         >0              \b, lower left corner: %d
>4      leshort         >0              \b, lower right corner: %d
>10     byte&0x1        =0x1            \b, clear first
>10     byte&0x2        =0x2            \b, no background
>10     byte&0x4        =0x4            \b, alpha channel
>10     byte&0x8        =0x8            \b, comment
>11     byte            >0              \b, %d color channels
>12     byte            >0              \b, %d bits per pixel
>13     byte            >0              \b, %d color map channels

# image file format (Robert Potter, potter@cs.rochester.edu)
0       string          Imagefile\ version-     iff image data
# this adds the whole header (inc. version number), informative but longish
>10     string          >\0             %s

# Sun raster images, from Daniel Quinlan (quinlan@yggdrasil.com)
0       belong          0x59a66a95      Sun raster image data
>4      belong          >0              \b, %d x
>8      belong          >0              %d,
>12     belong          >0              %d-bit,
#>16    belong          >0              %d bytes long,
>20     belong          0               old format,
#>20    belong          1               standard,
>20     belong          2               compressed,
>20     belong          3               RGB,
>20     belong          4               TIFF,
>20     belong          5               IFF,
>20     belong          0xffff          reserved for testing,
>24     belong          0               no colormap
>24     belong          1               RGB colormap
>24     belong          2               raw colormap
#>28    belong          >0              colormap is %d bytes long

# SGI image file format, from Daniel Quinlan (quinlan@yggdrasil.com)
# file://sgi.com/graphics/SGIIMAGESPEC
0       beshort         474             SGI image data
#>2     byte            0               \b, verbatim
>2      byte            1               \b, RLE
#>3     byte            1               \b, normal precision
>3      byte            2               \b, high precision
>4      beshort         x               \b, %d-D
>6      beshort         x               \b, %d x
>8      beshort         x               %d
>10     beshort         x               \b, %d channel
>10     beshort         !1              \bs
>80     string          >0              \b, "%s"

0       string          IT01            FIT image data
>4      belong          x               \b, %d x
>8      belong          x               %d x
>12     belong          x               %d
#
0       string          IT02            FIT image data
>4      belong          x               \b, %d x
>8      belong          x               %d x
>12     belong          x               %d
#
2048    string          PCD_IPI         Kodak Photo CD image pack file
0       string          PCD_OPA         Kodak Photo CD overview pack file

# FITS format.  Jeff Uphoff <juphoff@tarsier.cv.nrao.edu>
# FITS is the Flexible Image Transport System, the de facto standard for
# data and image transfer, storage, etc., for the astronomical community.
# (FITS floating point formats are big-endian.)
0       string  SIMPLE\ \ =     FITS image data
>109    string  8               \b, 8-bit, character or unsigned binary integer
>108    string  16              \b, 16-bit, two's complement binary integer
>107    string  \ 32            \b, 32-bit, two's complement binary integer
>107    string  -32             \b, 32-bit, floating point, single precision
>107    string  -64             \b, 64-bit, floating point, double precision

# other images
0       string  This\ is\ a\ BitMap\ file       Lisp Machine bit-array-file
0       string          !!              Bennet Yee's "face" format

# From SunOS 5.5.1 "/etc/magic" - appeared right before Sun raster image
# stuff.
#
0       beshort         0x1010          PEX Binary Archive