Your message dated Sun, 18 Jun 2017 09:05:15 +0000
with message-id <[email protected]>
and subject line Bug#857610: fixed in diffoscope 83
has caused the Debian Bug report #857610,
regarding diffoscope: dump GIF images to text using gifbuild (or giftext)
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
857610: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=857610
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: diffoscope
Severity: wishlist

I noticed that gifbuild can dump GIF images to text.
It might be interesting to use gifbuild in a similar
way to how sng is used to dump PNG images to text.
The giftext tool can also dump GIFs images to text.
Both of these tools are from the giflib-tools package.

Here is an example of a small gif image:

$ gifbuild -d dep.gif 
#
# GIF information from dep.gif
screen width 16
screen height 16
screen colors 128
screen background 0
pixel aspect byte 0

screen map
        sort flag off
        rgb 006 002 004
        rgb 154 142 132
        rgb 118 006 004
        rgb 098 086 084
        rgb 066 002 004
        rgb 122 114 108
        rgb 214 210 196
        rgb 166 006 004
        rgb 050 038 036
        rgb 202 046 044
        rgb 058 002 004
        rgb 194 022 020
        rgb 026 014 012
        rgb 238 238 220
        rgb 182 010 004
        rgb 018 002 004
        rgb 234 178 180
        rgb 098 006 004
        rgb 082 002 004
        rgb 206 074 076
        rgb 226 146 148
        rgb 242 210 212
        rgb 250 250 236
        rgb 190 010 004
        rgb 014 002 004
        rgb 170 014 012
        rgb 018 010 012
        rgb 174 166 156
        rgb 106 098 092
        rgb 074 002 004
        rgb 134 122 116
        rgb 230 226 212
        rgb 178 006 004
        rgb 190 030 028
        rgb 026 002 004
        rgb 206 198 188
        rgb 090 002 004
        rgb 222 122 124
        rgb 254 250 252
        rgb 194 014 012
        rgb 010 002 004
        rgb 158 146 140
        rgb 070 002 004
        rgb 126 114 108
        rgb 222 218 204
        rgb 170 006 004
        rgb 054 042 044
        rgb 206 062 060
        rgb 034 022 020
        rgb 194 026 028
        rgb 026 018 012
        rgb 246 246 228
        rgb 186 010 004
        rgb 022 002 004
        rgb 234 182 180
        rgb 114 006 004
        rgb 086 002 004
        rgb 210 090 092
        rgb 230 166 164
        rgb 246 222 220
        rgb 254 254 236
        rgb 190 010 012
        rgb 014 006 004
        rgb 110 098 092
        rgb 000 000 000
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end

image # 1
image left 0
image top 0
image bits 16 by 16 hex
3c3c3c3c3c3c3c16163c3c3c3c3c3c3c
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3c3c3c3c061c3018180c03233c3c3c3c
3c3c3c3c1616330d0d333c3c3c263c3c

# The following sets edit modes for GNU EMACS
# Local Variables:
# mode:picture
# truncate-lines:t
# End:
# End of dep.gif dump


-- 
bye,
pabs

https://wiki.debian.org/PaulWise

Attachment: signature.asc
Description: This is a digitally signed message part


--- End Message ---
--- Begin Message ---
Source: diffoscope
Source-Version: 83

We believe that the bug you reported is fixed in the latest version of
diffoscope, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Chris Lamb <[email protected]> (supplier of updated diffoscope package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Sun, 18 Jun 2017 15:34:59 +0800
Source: diffoscope
Binary: diffoscope
Built-For-Profiles: nocheck
Architecture: source
Version: 83
Distribution: unstable
Urgency: medium
Maintainer: Reproducible builds folks 
<[email protected]>
Changed-By: Chris Lamb <[email protected]>
Description:
 diffoscope - in-depth comparison of files, archives, and directories
Closes: 780761 833697 850758 856446 856447 857610 857940 858223 858867 859034 
859056 859117 861109 861286
Changes:
 diffoscope (83) unstable; urgency=medium
 .
   [ Chris Lamb ]
   * New features:
     * Add comparator for Fontconfig cache files.
   * Bug fixes:
     - Don't fail when run under perversely recursive input files. See
       <https://research.swtch.com/zip> for more information. (Closes: #780761)
     - Prevent a traceback when using --new-file with containers by passing
       progress_name of the Member and not the member itself. (Closes: #861286)
     - Drop passing has_differences around, fixing an issue with generating
       files called '-'.
   * Cleanups & refactoring:
     - Reorder and rename FIFOFeeder arguments to prevent tools incorrectly
       parsing as a SyntaxError.
     - Refactor HTML and text presenters so they fit the same interface.
     - Refactor Presenter to a singleton manager.
     - Split output and configuration of presenters.
     - Prevent abstraction-level violation by defining visual diff support on
       the Presenter classes.
     - Split diffoscope.difference into a feeders module.
     - Document various variables.
     - PEP8-ify and tidy a lot of files.
 .
   [ Ximin Luo ]
   * New features:
     - Add --max-container-depth CLI option.
     - Add various traverse_* methods to Difference.
     - Weigh elements in progress bar by their size.
     - Add a reader for the JSON format.
     - Add a --exclude-command CLI for filtering out long-running commands like
       "readelf --debug-dump=info".
     - Don't show +/- controls for differences with no children.
     - Use unicode chars for the +/- controls instead of punctuation.
   * Bug fixes:
     - Fix --exclude control.tar.gz.
     - Make the progress bar play nicely with --debug.
     - When enforcing max-container-depth, show which internal files differ,
       without showing details.
     - Fix JSON presenter to handle recursion properly.
     - Avoid a ZeroDivisionError in the progress bar
     - Fix create_limited_print_func.
   * Tests:
     - Fix failing tests due to logging global state.
     - Add tips about running with TMPDIR=/run/shm.
   * Cleanups & refactoring:
     - Remove unnecessary "dest" args to argparse.
     - Refactor DirectoryContainer to be more similar to Container.
     - Refactor Container abstract method names.
     - Remove unused imports and tidy up Container.comparisons().
     - rename get_{filtered => adjusted}_members_sizes for consistency.
     - Move tests/comparators/utils up one directory.
     - html-dir: show/hide diff comments which can be very large.
     - Refactor html-dir presenter to a class instance avoiding global state.
     - Move side-by-side and linediff algorithms to difference.py.
     - difference: has_children -> has_visible_children, and take into account
       comments.
     - Move ydiff/linediff from diffoscope.{difference => diff} to group
       unified_diff-related things together
 .
   [ Maria Glukhova ]
   * New features:
     - Add visual comparisons for JPEG, ICO, PNG and static GIF images.
   * Test improvements:
     - Test that external tools providers are being returned when tool is not
       found.
     - Add tests for OutputParserError and ContainerExtractionError.
   * Cleanups & refactoring:
     * Ignore text difference if we have a visual one.
     * Fix link formatting and typo in README.
     * Rename html_output to compute_visual_diffs and explain its purpose.
     * Removed duplicated functions from diff.py.
 .
   [ Mattia Rizzolo ]
   * Export junit-xml style test report when building on Jenkins.
 .
   [ anthraxx ]
   * Extend external Arch Linux tools list.
 .
 diffoscope (82) experimental; urgency=medium
 .
   [ Chris Lamb ]
   * New features:
     - Add support for comparing Pcap files. (Closes: #858867)
     - Add support for .docx and .odt files via docx2txt & odt2txt.
       (Closes: #859056)
     - Add support for PGP files via pgpdump. (Closes: #859034)
     - Add support for comparing Ogg Vorbis files.
   * Bug fixes:
     - Don't crash on invalid archives; print a useful error instead.
       (Closes: #833697)
     - Ensure tests and the runtime environment can locate binaries in
       /usr/sbin (eg. tcpdump)
   * Tests:
     - Ensure that PATH is modified.
     - Ensure @tool_required raises RequiredToolNotFound.
     - Don't assume that /sbin/init exists; locate any /sbin binary manually and
       then test for that. This should prevent FTBFS on travis-ci.org.
     - Show packages installed in report output.
   * Misc:
     - comparators.bzip2: Don't print error output from bzip2 call.
     - comparators.pcap: Show the delta, not the absolute time.
     - Use /usr/share/dpkg/pkg-info.mk over manual calls to dpkg-parsechangelog
       in debian/rules.
     - Document PYTHONPATH usage when running tests in README.Source.
     - Add internal documentation for @tool_required decorator.
 .
   [ [email protected] ]
   * Display differences in zip platform-specific timestamps. (Closes: #859117)
 .
   [ Ximin Luo ]
   * Add support for R .rds and .rdb object files.
 .
   [ Vagrant Cascadian ]
   * Add support for .dtb (device tree blob) files (Closes: #861109).
 .
 diffoscope (81) experimental; urgency=medium
 .
   [ Chris Lamb ]
   * Correct meaningless "1234-content" metadata when introspecting files
     within archives. This was a regression since #854723 due to the use of
     auto-incrementing on-disk filenames. (Closes: #858223)
   * Refactor get_compressed_content_name.
 .
   [ Ximin Luo ]
   * Improve ISO9660/DOS/MBR check.
 .
 diffoscope (80) experimental; urgency=medium
 .
   * Ensure that we really are using ImageMagick and not, for example, the
     GraphicsMagick compatibility layer installed by
     graphicsmagick-imagemagick-compat. (Closes: #857940)
   * Factor out the unicode decoding of the identify -version output.
   * travis.yml: Don't build tags.
 .
 diffoscope (79) experimental; urgency=medium
 .
   [ Chris Lamb ]
   * Extract SquashFS images in one go rather than per-file, speeding up (eg.)
     Tails ISO comparison by ~10x.
   * Support newer versions of cbfstool to avoid test failures.
     (Closes: #856446)
   * Skip icc test that varies on endian if the Debian-specific patch is not
     present. (Closes: #856447)
   * Compare GIF images using gifbuild. (Closes: #857610)
   * Also interpret "DOS/MBR boot sector" files as ISO images as they may have
     been processed by isohybrid.
   * Progress bar:
     - Hide bar if we are running with --debug mode.
     - Update prior to working on an item so the displayed filename is correct.
 .
   [ Maria Glukhova ]
   * Improve AndroidManifest.xml comparison for APK files.
     - Indicate the AndroidManifest.xml type. (Closes: #850758)
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--- End Message ---
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