tree: 3ad9dd6a4d138aca62aa74a04c65591fa975d6a1 [path history] [tgz]
  1. analysis/
  2. artificial/
  3. non-ascii/
  4. animated-red-blue.gif
  5. animated-red-blue.nia
  6. archive.7z
  8. archive.iso
  10. archive.rar
  11. archive.tar
  12. archive.tar.bz2
  13. archive.tar.gz
  15. australian-abc-local-stations.json
  16. australian-abc-local-stations.tokens
  17. bricks-color.bmp
  18. bricks-color.jpeg
  19. bricks-color.lossless.webp
  20. bricks-color.lossy.webp
  21. bricks-color.png
  22. bricks-color.tiff
  23. bricks-dither.bmp
  24. bricks-dither.gif
  25. bricks-dither.indexes
  26. bricks-dither.indexes.giflzw
  27. bricks-dither.lossless.webp
  29. bricks-dither.palette
  30. bricks-dither.png
  31. bricks-gray.bmp
  32. bricks-gray.gif
  33. bricks-gray.indexes
  34. bricks-gray.indexes.giflzw
  35. bricks-gray.jpeg
  36. bricks-gray.lossless.webp
  37. bricks-gray.lossy.webp
  39. bricks-gray.png
  40. bricks-gray.tiff
  41. bricks-nodither.bmp
  42. bricks-nodither.gif
  43. bricks-nodither.indexes
  44. bricks-nodither.indexes.giflzw
  45. bricks-nodither.lossless.webp
  46. bricks-nodither.palette
  47. bricks-nodither.png
  48. bricks-nodither.wbmp
  49. cbor-rfc-7049-examples.cbor
  50. cbor-rfc-7049-examples.sans-comments.json
  51. cbor-rfc-7049-examples.tokens
  52. cbor-rfc-7049-examples.with-comments.json
  53. crude-flag.nia
  54. crude-flag.nie
  55. crude-flag.nii
  56. file-sizes.json
  57. gifplayer-muybridge.gif
  58. github-tags.json
  59. harvesters.bmp
  60. harvesters.gif
  61. harvesters.jpeg
  62. harvesters.lossless.webp
  63. harvesters.lossy.webp
  64. harvesters.png
  65. harvesters.tiff
  66. hat.bmp
  67. hat.gif
  68. hat.jpeg
  69. hat.lossless.webp
  70. hat.lossy.webp
  71. hat.png
  72. hat.tiff
  73. hat.wbmp
  75. hibiscus.primitive.bmp
  76. hibiscus.primitive.gif
  77. hibiscus.primitive.jpeg
  78. hibiscus.primitive.lossless.webp
  79. hibiscus.primitive.lossy.webp
  80. hibiscus.primitive.png
  81. hibiscus.primitive.svg
  82. hibiscus.primitive.tiff
  83. hibiscus.regular.bmp
  84. hibiscus.regular.gif
  85. hibiscus.regular.jpeg
  86. hibiscus.regular.lossless.webp
  87. hibiscus.regular.lossy.webp
  88. hibiscus.regular.png
  89. hibiscus.regular.tiff
  90. hippopotamus.bmp
  91. hippopotamus.interlaced.gif
  92. hippopotamus.interlaced.png
  93. hippopotamus.interlaced.truncated.gif
  94. hippopotamus.jpeg
  95. hippopotamus.lossless.webp
  96. hippopotamus.lossy.webp
  97. hippopotamus.masked-with-muybridge.gif
  98. hippopotamus.masked-with-muybridge.png
  99. hippopotamus.nie
  100. hippopotamus.regular.gif
  101. hippopotamus.regular.png
  102. hippopotamus.tiff
  103. json-quirks.json
  104. json-quirks.tokens
  105. json-things.cbor
  106. json-things.formatted.json
  107. json-things.unformatted.json
  108. json-things.unformatted.tokens
  109. midsummer.txt
  110. midsummer.txt.gz
  111. midsummer.txt.zlib
  112. muybridge-frame-000.indexes
  113. muybridge-frame-000.wbmp
  114. muybridge-frame-001.indexes
  115. muybridge-frame-002.indexes
  116. muybridge-frame-003.indexes
  117. muybridge-frame-004.indexes
  118. muybridge-frame-005.indexes
  119. muybridge-frame-006.indexes
  120. muybridge-frame-007.indexes
  121. muybridge-frame-008.indexes
  122. muybridge-frame-009.indexes
  123. muybridge-frame-010.indexes
  124. muybridge-frame-011.indexes
  125. muybridge-frame-012.indexes
  126. muybridge-frame-013.indexes
  127. muybridge-frame-014.indexes
  128. muybridge.gif
  129. nobel-prizes.json
  130. pi.txt
  131. pi.txt.giflzw
  132. pi.txt.gz
  133. pi.txt.zlib
  134. pjw-thumbnail.bmp
  135. pjw-thumbnail.gif
  136. pjw-thumbnail.jpeg
  137. pjw-thumbnail.lossless.webp
  138. pjw-thumbnail.lossy.webp
  139. pjw-thumbnail.png
  140. pjw-thumbnail.tiff
  142. rfc-6901-json-pointer.json
  143. rgb24png.bmp
  144. romeo.txt
  145. romeo.txt.bz2
  146. romeo.txt.deflate
  147. romeo.txt.fixed-huff.deflate
  148. romeo.txt.gz
  149. romeo.txt.zlib
  150. sheep-more.rac

Unless otherwise noted, the *.gzfiles were generated by the gzip command line tool and the *.deflate and *.zlib versions were then generated by script/extract-deflate-offsets.go. Similarly, the *.giflzw files were generated by script/extract-giflzw.go and the *.palette and *.indexes files were generated by script/extract-palette-indexes.go. The *.tokens files were generated by script/print-json-token-debug-format.c.

The *.jpeg files are usually the canonical versions of the test/data images, and other versions (*.bmp, *.gif, *.png, *.tiff) were generated by ImageMagick's convert command line tool. The *.wbmp versions were generated by the script/convert-png-to-wbmp.go command line tool. The *.webp versions were generated by the cwebp command line tool. The *.no-ancillary.png files were generated by the script/strip-png-ancillary-chunks.go command line tool.

The artificial directory holds artificially generated test data, often to explicitly test corner cases of various file formats. The files there usually come in families whose names have a common prefix, such as three files,, all prefixed by The file whose name is that prefix is usually the canonical (typically hand-crafted) file, and the other files are then derived from that. Outside of the artificial directory, the other files in this directory are typically real world examples of various file formats, or deriviations of them.

The non-ascii directory holds trivial UTF-8 (but not ASCII) text files.

archive.* archives a subset of other files in this directory.

animated-red-blue.gif is an original animation by Nigel Tao

australian-abc-local-stations.json was crawled from

bricks-* are various encodings of an original photo by Nigel Tao

cbor-rfc-7049-examples.cbor is the concatenated examples from RFC 7049. The cbor-rfc-7049-examples.*.json files were then generated by example/cbor-to-json.

crude-flag.* is an original animation by Nigel Tao See the lib/nie documentation.

file-sizes.json was created by running script/print-file-sizes-json.go in this repository's root directory.

gifplayer-muybridge.gif is an original animation by Nigel Tao

harvesters.* are various encodings of a photo of “The Harvesters” by Pieter Bruegel the Elder, held by the Metropolitan Museum of Art. lists that image as in the public domain.

github-tags.json was crawled from

hat.* are various encodings of a photo of “Self-Portrait with a Straw Hat (obverse: The Potato Peeler)” by Vincent van Gogh, held by the Metropolitan Museum of art. lists that image as in the public domain. is a trivial shell script.

hibiscus.regular.* are various encodings of a photo of “Hibiscus and Parrots” by Louis Comfort Tiffany, held by the Metropolitan Museum of Art. lists that image as in the public domain.

hibiscus.primitive.* is the result of running the hibiscus.regular.png image through and other programs:

  • primitive -i hibiscus.regular.png -o hibiscus.primitive.svg -s 442 -n 32
  • inkscape -z -e hibiscus.primitive.png hibiscus.primitive.svg
  • Various invocations of convert and cwebp

hippopotamus.* are various encodings of a cropping of a photo of “Hippopotamus (William)”, held by the Metropolitan Museum of Art. lists that image as in the public domain. says that “You are welcome to use images of artworks in The Met collection that the Museum believes to be in the public domain, or those to which the Museum waives any copyright it might have, for any purpose, including commercial and noncommercial use, free of charge and without requiring permission from the Museum.”

json-things.* are original JSON objects by Nigel Tao

midsummer.txt is an excerpt of Shakespeare‘s "A Midsummer Night’s Dream", copied from

muybridge.gif is derived from which is in the public domain.

nobel-prizes.json was crawled from

pi.txt contains the digits of pi.

pjw-thumbnail.* are various encodings of an image derived from an iconic, original photo of Peter J. Weinberger by Rob Pike

rfc-6901-json-pointer.json is the example JSON document given in the RFC 6901 “JavaScript Object Notation (JSON) Pointer” specification.

rgb24png.bmp comes from BMP Suite, which states that its generated images “are in the public domain”.

romeo.txt is an excerpt of Shakespeare's “Romeo and Juliet”, copied from

romeo.txt.fixed-huff.deflate was derived from romeo.txt by a custom program to use fixed (not dynamic) Huffman tables for the deflate encoding.

sheep-more.rac is a RAC-compression of original text by Nigel Tao