images 7.5 KB

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  1. #------------------------------------------------------------------------------
  2. # images: file(1) magic for image formats (see also "iff")
  3. #
  4. # originally from jef@helios.ee.lbl.gov (Jef Poskanzer),
  5. # additions by janl@ifi.uio.no as well as others. Jan also suggested
  6. # merging several one- and two-line files into here.
  7. #
  8. # little magic: PCX (first byte is 0x0a)
  9. # no magic: Targa
  10. # PBMPLUS images
  11. # The next byte following the magic is always whitespace.
  12. 0 string P1 PBM image text
  13. 0 string P2 PGM image text
  14. 0 string P3 PPM image text
  15. 0 string P4 PBM "rawbits" image data
  16. 0 string P5 PGM "rawbits" image data
  17. 0 string P6 PPM "rawbits" image data
  18. # NIFF (Navy Interchange File Format, a modification of TIFF) images
  19. 0 string IIN1 NIFF image data
  20. # Tag Image File Format, from Daniel Quinlan (quinlan@yggdrasil.com)
  21. # The second word of TIFF files is the TIFF version number, 42, which has
  22. # never changed. The TIFF specification recommends testing for it.
  23. 0 string MM\x00\x2a TIFF image data, big-endian
  24. 0 string II\x2a\x00 TIFF image data, little-endian
  25. # PNG [Portable Network Graphics, or "PNG's Not GIF"] images
  26. # (Greg Roelofs, newt@uchicago.edu)
  27. # (Albert Cahalan, acahalan@cs.uml.edu)
  28. #
  29. # 137 P N G \r \n ^Z \n [4-byte length] H E A D [HEAD data] [HEAD crc] ...
  30. #
  31. 0 string \x89PNG PNG image data,
  32. >4 belong !0x0d0a1a0a CORRUPTED,
  33. >4 belong 0x0d0a1a0a
  34. >>16 belong x %ld x
  35. >>20 belong x %ld,
  36. >>24 byte x %d-bit
  37. >>25 byte 0 grayscale,
  38. >>25 byte 2 \b/color RGB,
  39. >>25 byte 3 colormap,
  40. >>25 byte 4 gray+alpha,
  41. >>25 byte 6 \b/color RGBA,
  42. #>>26 byte 0 deflate/32K,
  43. >>28 byte 0 non-interlaced
  44. >>28 byte 1 interlaced
  45. 1 string PNG PNG image data, CORRUPTED
  46. # GIF
  47. 0 string GIF8 GIF image data
  48. >4 string 7a \b, version 8%s,
  49. >4 string 9a \b, version 8%s,
  50. >6 leshort >0 %hd x
  51. >8 leshort >0 %hd,
  52. #>10 byte &0x80 color mapped,
  53. #>10 byte&0x07 =0x00 2 colors
  54. #>10 byte&0x07 =0x01 4 colors
  55. #>10 byte&0x07 =0x02 8 colors
  56. #>10 byte&0x07 =0x03 16 colors
  57. #>10 byte&0x07 =0x04 32 colors
  58. #>10 byte&0x07 =0x05 64 colors
  59. #>10 byte&0x07 =0x06 128 colors
  60. #>10 byte&0x07 =0x07 256 colors
  61. # ITC (CMU WM) raster files. It is essentially a byte-reversed Sun raster,
  62. # 1 plane, no encoding.
  63. 0 string \361\0\100\273 CMU window manager raster image data
  64. >4 lelong >0 %d x
  65. >8 lelong >0 %d,
  66. >12 lelong >0 %d-bit
  67. # Magick Image File Format
  68. 0 string id=ImageMagick MIFF image data
  69. # Artisan
  70. 0 long 1123028772 Artisan image data
  71. >4 long 1 \b, rectangular 24-bit
  72. >4 long 2 \b, rectangular 8-bit with colormap
  73. >4 long 3 \b, rectangular 32-bit (24-bit with matte)
  74. # FIG (Facility for Interactive Generation of figures), an object-based format
  75. 0 string #FIG FIG image text
  76. >5 string x \b, version %.3s
  77. # PHIGS
  78. 0 string ARF_BEGARF PHIGS clear text archive
  79. 0 string @(#)SunPHIGS SunPHIGS
  80. # version number follows, in the form m.n
  81. >40 string SunBin binary
  82. >32 string archive archive
  83. # GKS (Graphics Kernel System)
  84. 0 string GKSM GKS Metafile
  85. >24 string SunGKS \b, SunGKS
  86. # CGM image files
  87. 0 string BEGMF clear text Computer Graphics Metafile
  88. # XXX - questionable magic
  89. 0 beshort&0xffe0 0x0020 binary Computer Graphics Metafile
  90. 0 beshort 0x3020 character Computer Graphics Metafile
  91. # MGR bitmaps (Michael Haardt, u31b3hs@pool.informatik.rwth-aachen.de)
  92. 0 string yz MGR bitmap, modern format, 8-bit aligned
  93. 0 string zz MGR bitmap, old format, 1-bit deep, 16-bit aligned
  94. 0 string xz MGR bitmap, old format, 1-bit deep, 32-bit aligned
  95. 0 string yx MGR bitmap, modern format, squeezed
  96. # Fuzzy Bitmap (FBM) images
  97. 0 string %bitmap\0 FBM image data
  98. >30 long 0x31 \b, mono
  99. >30 long 0x33 \b, color
  100. # facsimile data
  101. 1 string PC\ Research,\ Inc group 3 fax data
  102. >29 byte 0 \b, normal resolution (204x98 DPI)
  103. >29 byte 1 \b, fine resolution (204x196 DPI)
  104. # JPEG images
  105. # SunOS 5.5.1 had
  106. #
  107. # 0 string \377\330\377\340 JPEG file
  108. # 0 string \377\330\377\356 JPG file
  109. #
  110. # both of which turn into "JPEG image data" here.
  111. #
  112. 0 beshort 0xffd8 JPEG image data
  113. >6 string JFIF \b, JFIF standard
  114. # HSI is Handmade Software's proprietary JPEG encoding scheme
  115. 0 string hsi1 JPEG image data, HSI proprietary
  116. # PC bitmaps (OS/2, Windoze BMP files) (Greg Roelofs, newt@uchicago.edu)
  117. 0 string BM PC bitmap data
  118. >14 leshort 12 \b, OS/2 1.x format
  119. >>18 leshort x \b, %d x
  120. >>20 leshort x %d
  121. >14 leshort 64 \b, OS/2 2.x format
  122. >>18 leshort x \b, %d x
  123. >>20 leshort x %d
  124. >14 leshort 40 \b, Windows 3.x format
  125. >>18 lelong x \b, %d x
  126. >>22 lelong x %d x
  127. >>28 leshort x %d
  128. 0 string IC PC icon data
  129. 0 string PI PC pointer image data
  130. 0 string CI PC color icon data
  131. 0 string CP PC color pointer image data
  132. # Conflicts with other entries [BABYL]
  133. #0 string BA PC bitmap array data
  134. # XPM icons (Greg Roelofs, newt@uchicago.edu)
  135. # note possible collision with C/REXX entry in c-lang; currently commented out
  136. 0 string /*\ XPM\ */ X pixmap image text
  137. # Utah Raster Toolkit RLE images (janl@ifi.uio.no)
  138. 0 leshort 0xcc52 RLE image data,
  139. >6 leshort x %d x
  140. >8 leshort x %d
  141. >2 leshort >0 \b, lower left corner: %d
  142. >4 leshort >0 \b, lower right corner: %d
  143. >10 byte&0x1 =0x1 \b, clear first
  144. >10 byte&0x2 =0x2 \b, no background
  145. >10 byte&0x4 =0x4 \b, alpha channel
  146. >10 byte&0x8 =0x8 \b, comment
  147. >11 byte >0 \b, %d color channels
  148. >12 byte >0 \b, %d bits per pixel
  149. >13 byte >0 \b, %d color map channels
  150. # image file format (Robert Potter, potter@cs.rochester.edu)
  151. 0 string Imagefile\ version- iff image data
  152. # this adds the whole header (inc. version number), informative but longish
  153. >10 string >\0 %s
  154. # Sun raster images, from Daniel Quinlan (quinlan@yggdrasil.com)
  155. 0 belong 0x59a66a95 Sun raster image data
  156. >4 belong >0 \b, %d x
  157. >8 belong >0 %d,
  158. >12 belong >0 %d-bit,
  159. #>16 belong >0 %d bytes long,
  160. >20 belong 0 old format,
  161. #>20 belong 1 standard,
  162. >20 belong 2 compressed,
  163. >20 belong 3 RGB,
  164. >20 belong 4 TIFF,
  165. >20 belong 5 IFF,
  166. >20 belong 0xffff reserved for testing,
  167. >24 belong 0 no colormap
  168. >24 belong 1 RGB colormap
  169. >24 belong 2 raw colormap
  170. #>28 belong >0 colormap is %d bytes long
  171. # SGI image file format, from Daniel Quinlan (quinlan@yggdrasil.com)
  172. #
  173. # See
  174. # http://reality.sgi.com/grafica/sgiimage.html
  175. #
  176. 0 beshort 474 SGI image data
  177. #>2 byte 0 \b, verbatim
  178. >2 byte 1 \b, RLE
  179. #>3 byte 1 \b, normal precision
  180. >3 byte 2 \b, high precision
  181. >4 beshort x \b, %d-D
  182. >6 beshort x \b, %d x
  183. >8 beshort x %d
  184. >10 beshort x \b, %d channel
  185. >10 beshort !1 \bs
  186. >80 string >0 \b, "%s"
  187. 0 string IT01 FIT image data
  188. >4 belong x \b, %d x
  189. >8 belong x %d x
  190. >12 belong x %d
  191. #
  192. 0 string IT02 FIT image data
  193. >4 belong x \b, %d x
  194. >8 belong x %d x
  195. >12 belong x %d
  196. #
  197. 2048 string PCD_IPI Kodak Photo CD image pack file
  198. 0 string PCD_OPA Kodak Photo CD overview pack file
  199. # FITS format. Jeff Uphoff <juphoff@tarsier.cv.nrao.edu>
  200. # FITS is the Flexible Image Transport System, the de facto standard for
  201. # data and image transfer, storage, etc., for the astronomical community.
  202. # (FITS floating point formats are big-endian.)
  203. 0 string SIMPLE\ \ = FITS image data
  204. >109 string 8 \b, 8-bit, character or unsigned binary integer
  205. >108 string 16 \b, 16-bit, two's complement binary integer
  206. >107 string \ 32 \b, 32-bit, two's complement binary integer
  207. >107 string -32 \b, 32-bit, floating point, single precision
  208. >107 string -64 \b, 64-bit, floating point, double precision
  209. # other images
  210. 0 string This\ is\ a\ BitMap\ file Lisp Machine bit-array-file
  211. 0 string !! Bennet Yee's "face" format
  212. # From SunOS 5.5.1 "/etc/magic" - appeared right before Sun raster image
  213. # stuff.
  214. #
  215. 0 beshort 0x1010 PEX Binary Archive
  216. # Visio drawings
  217. 03000 string Visio\ (TM)\ Drawing %s