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Skip gif animation optimization in case both frames are identical

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This works around an issue in libgd2 library which would otherwise
cause segfaults due to zero sized images
This commit is contained in:
mmd-osm 2019-04-03 19:12:45 +02:00
parent ab6d657992
commit 7f138fb014
1 changed files with 3 additions and 1 deletions
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4
lib/gpx.rb
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@ -103,7 +103,9 @@ module GPX
res = GD2::AnimatedGif.gif_anim_begin(frames[0])
res << GD2::AnimatedGif.gif_anim_add(frames[0], nil, delay)
(1...nframes).each do |n|
res << GD2::AnimatedGif.gif_anim_add(frames[n], frames[n - 1], delay)
res << GD2::AnimatedGif.gif_anim_add(frames[n],
(frames[n] == frames[n - 1] ? nil : frames[n - 1]),
delay)
end
res << GD2::AnimatedGif.gif_anim_end