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EXIF orientation info in PNGs isn't used for image-orientation: from-image

bugzilla.mozilla.org

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Re: EXIF orientation info in PNGs isn't used for image-orientation: from-image

#2

Post by LiamPowell »

See also: The VLC bug that incorrectly applies right crops as left crops [1]. This bug report is from 2023, however the bug has existed as long as VLC has as far as I know.

I'm always surprised to see bugs like this where an extremely easy to test part of the spec just seemingly isn't tested and ends up as a bug that never gets fixed until many years later.

[0]: https://code.videolan.org/videolan/vlc/-/issues/28279

Re: EXIF orientation info in PNGs isn't used for image-orientation: from-image

#3

Post by pwdisswordfishy »

LiamPowell wrote: post #2

See also: The VLC bug that incorrectly applies right crops as left crops [1]. This bug report is from 2023, however the bug has existed as long as VLC has as far as I know. I'm always surprised to see bugs like this where an extremely easy to test part of the spec just seemingly isn't tested and ends up as a bug that never gets fixed until many years later. [0]: https://code.videolan.org/videolan/vlc/-/issues/28279

Compare also:

https://trac.ffmpeg.org/ticket/11279

https://trac.ffmpeg.org/ticket/11284

Re: EXIF orientation info in PNGs isn't used for image-orientation: from-image

#4

Post by moron4hire »

LiamPowell wrote: post #2

See also: The VLC bug that incorrectly applies right crops as left crops [1]. This bug report is from 2023, however the bug has existed as long as VLC has as far as I know. I'm always surprised to see bugs like this where an extremely easy to test part of the spec just seemingly isn't tested and ends up as a bug that never gets fixed until many years later. [0]: https://code.videolan.org/videolan/vlc/-/issues/28279

I firmly believe every product team needs to be split in two: one half works on the issue of highest importance, the other works on the easiest issues. If only to avoid the embarrassment of easy to fix bugs that were passed over for eons just because they weren't priority-high.

Re: EXIF orientation info in PNGs isn't used for image-orientation: from-image

#7

Post by silon42 »

moron4hire wrote: post #4
LiamPowell wrote: post #2

See also: The VLC bug that incorrectly applies right crops as left crops [1]. This bug report is from 2023, however the bug has existed as long as VLC has as far as I know. I'm always surprised to see bugs like this where an extremely easy to test part of the spec just seemingly isn't tested and ends up as a bug that never gets fixed until many years later. [0]: https://code.videolan.org/videolan/vlc/-/issues/28279

I firmly believe every product team needs to be split in two: one half works on the issue of highest importance, the other works on the easiest issues. If only to avoid the embarrassment of easy to fix bugs that were passed over for eons just because they weren't priority-high.

Also, people in the first team should also alternate hard/complicated issues with easy fixes.

Re: EXIF orientation info in PNGs isn't used for image-orientation: from-image

#8

Post by nkrisc »

mightysashiman wrote: post #5

Why does a bug report get shared on hn?

https://news.ycombinator.com/newsguidelines.html

> On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.

Someone probably thought it was interesting, and based on the fact it's on the front page and receiving comments, at least some other people agree.

Re: EXIF orientation info in PNGs isn't used for image-orientation: from-image

#9

Post by MontagFTB »

donatj wrote: post #6

Interesting. I was not aware that was a thing. Orientation info seems way less useful in a lossless format like PNG. It makes sense in JPEG for instance because rotating and re-encoding would be lossy and slightly degrade the image.

Looping through inflate/deflate on rotated pixels still takes more time than updating a bit in the Exif (and the chunk’s associated CRC)

Re: EXIF orientation info in PNGs isn't used for image-orientation: from-image

#10

Post by Avamander »

moron4hire wrote: post #4
LiamPowell wrote: post #2

See also: The VLC bug that incorrectly applies right crops as left crops [1]. This bug report is from 2023, however the bug has existed as long as VLC has as far as I know. I'm always surprised to see bugs like this where an extremely easy to test part of the spec just seemingly isn't tested and ends up as a bug that never gets fixed until many years later. [0]: https://code.videolan.org/videolan/vlc/-/issues/28279

I firmly believe every product team needs to be split in two: one half works on the issue of highest importance, the other works on the easiest issues. If only to avoid the embarrassment of easy to fix bugs that were passed over for eons just because they weren't priority-high.

I don't this makes business sense in general.

I do however think that there are quite a few bugs that might be triaged as "easy" but if worked on would reveal much more serious problems. Which is why some random selection of "easy" issues should make it to work queues.

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