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Apple have created a public chunk, iDOT, which is in widespread use on macOS, iPadOS and and iOS, particularly for
screenshots. Despite being public, it was never registered.
The chunk has ...
documentation
needs resolved discussion
registration: new chunk
svgeesus
- 9
- Opened on Jul 9
- #530
Originally raised by John Bowler on the email list:
I would also like to see some discussion of the issue raised by the now well established ACES AP0 profile. It is
described here: https://acescentral.com/knowledge-base-2/aces-working-spaces. ...
bug
needs edits
needs testcase (wpt)
svgeesus
- 9
- Opened on Jul 7
- #527
I noticed both https://www.w3.org/TR/png-3/ as well as https://www.w3.org/TR/2025/CR-png-3-20250313/ (the most recent CR
Snapshot) return a 404
JohnRiv
- 6
- Opened on Apr 29
- #516
This GitHub issue is to establish consensus on transitioning to Proposed Recommendation. W3C Working Group participants
should reply with affirmation, dissent, or may abstain.
Should we transition to ...
ProgramMax
- 12
- Opened on Apr 14
- #512
The example in Chapter 5.3 is mislabeled. The chunk cHNk should be marked as public, but it was mistakenly marked as
private. https://www.w3.org/TR/png-3/#5Chunk-naming-conventions
cHNk -- 32 bit chunk ...
invalid
yffufu
- 2
- Opened on Mar 18
- #510
I met with @bitbank2 who mentioned this.
§ 12.7 Filter selection says For images of color type 3 (indexed-color), filter type 0 (None) is usually the most
effective. This isn t necessarily true. Filter ...
documentation
ProgramMax
- 1
- Opened on Feb 21
- #505
This GitHub issue is to establish consensus on publishing a Candidate Recommendation Snapshot. W3C Working Group
participants should reply with affirmation, dissent, or may abstain.
Should we publish ...
svgeesus
- 12
- Opened on Feb 7
- #503
In the original eXIf chunk proposal from 2017-Jun-15
(http://ftp-osl.osuosl.org/pub/libpng/documents/proposals/eXIf/png-proposed-eXIf-chunk-2017-06-15.html) there was an
addition to the Security Considerations ...
ctruta
- 2
- Opened on Feb 3
- #497
From 1.3.6.2 fcTL Frame Control Chunk:
x_offset and y_offset define the x and y position of the following frame. They are encoded as PNG four-byte unsigned
integers. They must be greater than or equal ...
bug
svgeesus
- 1
- Opened on Jan 31
- #496
This is part of the more broad #493 discussion.
A new chunk (named iEId, image extra id ) would be added to describe an ID that gets used by the iEXt chunk #494 .
The iEId chunk starts with an ID number. ...
needs resolved discussion
ProgramMax
- 7
- Opened on Jan 29
- #495

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