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Consider adding support for non-standard png extensions #1

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Tyriar opened this issue Jan 11, 2022 · 2 comments
Closed

Consider adding support for non-standard png extensions #1

Tyriar opened this issue Jan 11, 2022 · 2 comments
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enhancement New feature or request

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Tyriar commented Jan 11, 2022 •
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From http://fileformats.archiveteam.org/wiki/PNG

Chunk type References and remarks
oFFs, pCAL, sCAL, gIFg, gIFx, gIFt**, fRAc Refer to Extensions to the PNG 1.2 Specification, v1.2.0.
sTER Refer to Extensions to the PNG 1.2 Specification, v1.3.0.
dSIG Refer to Extensions to the PNG 1.2 Specification, v1.4.0, and the PNG dSIG website.
acTL, fcTL, fdAT Used in APNG files.
vpAg, caNv, orNT Used by ImageMagick.
CgBI Refer to CgBI.
eXIf, exIf* Exif metadata. Refer to PNG Proposed eXIf chunk [approved 2017-07].
iDOT Used by Apple products. Some info at [1].

* Not doing to implement exIf as it's for test impls
** gIFt is deprecated
@Tyriar Tyriar added the enhancement New feature or request label Jan 11, 2022
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Tyriar commented Jan 15, 2022 •
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http://www.libpng.org/pub/png/png-sitemap.html#info
http://www.libpng.org/pub/png/spec/register/pngext-1.4.0-pdg.html

Tyriar added a commit that referenced this issue Jan 21, 2022
@Tyriar
sCAL support
724703a 
Part of #1
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Tyriar commented Feb 6, 2022

Main ones have their own issues now

@Tyriar Tyriar closed this as completed Feb 6, 2022
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