Portable Network Graphics (PNG) Working Group - Activity in 2025
No matches.
Past meetings
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1 meeting.
Participants
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3 organizations joined.
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Comcast Corporation joined.
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Adobe joined.
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Apple Inc. joined.
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GitHub
w3c/png
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1 issue opened.
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Improve section 7.2 Scanlines w3c/png#552, by @ghost.
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2 issues closed.
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Rechartering 2025-2027 w3c/png#535.
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3 issues received 4 new comments.
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Consider using Zstandard and/or LZ4 instead of Deflate w3c/png#39 (2 comments by @KyodaiKen, @ProgramMax)
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2 pull requests opened.
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12Create SECURITY.md w3c/png#548, by @0tn3d636729100h-ctrl.
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1 pull request closed.
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12Create SECURITY.md w3c/png#548.
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1 pull request received 1 new comment.
Lifecycle
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1 charter started.
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Chartered until 21 November 2027. Participants had to rejoin under this charter.
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Past meetings
Participants
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1 organization joined.
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British Broadcasting Corporation joined.
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6 organizations left.
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Google LLC left.
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Apple Inc. left.
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British Broadcasting Corporation left.
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Comcast Corporation left.
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MovieLabs left.
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Adobe left.
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GitHub
w3c/png
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4 issues received 8 new comments.
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Add the Apple `iDOT` chunk to the PNG Extensions specification w3c/png#530 (3 comments by @ronaldtse, @svgeesus)
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3 pull requests opened.
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0tn3d636729100h ctrl patch 2 w3c/png#547, by @0tn3d636729100h-ctrl.
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Create jekyll-docker.yml w3c/png#546, by @0tn3d636729100h-ctrl.
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Fix typos in index.html w3c/png#545, by @stoeckmann.
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2 pull requests merged.
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Fix typos in index.html w3c/png#545.
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2 pull requests closed.
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Create jekyll-docker.yml w3c/png#546.
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0tn3d636729100h ctrl patch 2 w3c/png#547.
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1 pull request reopened.
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Create jekyll-docker.yml w3c/png#546, by @0tn3d636729100h-ctrl.
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4 pull requests received 7 new comments.
GitHub
w3c/png
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1 issue opened.
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Filtering description confussion w3c/png#543, by @Ciubix8513.
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1 issue closed.
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C2PA and PNG w3c/png#542.
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2 issues received 3 new comments.
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1 pull request opened.
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Added `caBX` chunk for Content Credentials #542 w3c/png#544, by @svgeesus.
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1 pull request merged.
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Added `caBX` chunk for Content Credentials #542 w3c/png#544.
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2 pull requests received 19 new comments.
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Added `caBX` chunk for Content Credentials #542 w3c/png#544 (16 comments by @fintelia, @lrosenthol, @ProgramMax, @svgeesus)
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[Extensions] Add iDOT to "Chunks Not Described Here", #530 w3c/png#541 (3 comments by @leo-barnes, @svgeesus)
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Lifecycle
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1 charter extension.
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Charter extended until 30 January 2026.
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GitHub
w3c/png
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5 issues opened.
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C2PA and PNG w3c/png#542, by @svgeesus.
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mDCV example data has bug w3c/png#539, by @ccameron-chromium.
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Browsers are not handling BT.2020 images correctly w3c/png#538, by @svgeesus.
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5th edition meta-issue w3c/png#537, by @ProgramMax.
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4th edition meta-issue w3c/png#536, by @ProgramMax.
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3 issues closed.
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iCCP chunk requirements for GRAY and RGB w3c/png#478.
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mDCV example data has bug w3c/png#539.
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11 issues received 33 new comments.
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Browsers are not handling BT.2020 images correctly w3c/png#538 (7 comments by @ProgramMax, @svgeesus, @tnikkel)
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Some tone mapping requires the average luminance between frames w3c/png#311 (6 comments by @palemieux, @ProgramMax, @svgeesus)
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Add the Apple `iDOT` chunk to the PNG Extensions specification w3c/png#530 (3 comments by @leo-barnes, @ProgramMax, @svgeesus)
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Add PNG `hRWl` (HDR Reference White Level) chunk to conform to ISO 22028-5 w3c/png#390 (2 comments by @leo-barnes, @ProgramMax)
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2 pull requests opened.
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[Extensions] Add iDOT to "Chunks Not Described Here", #530 w3c/png#541, by @svgeesus.
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`mDCV` erratum #539 w3c/png#540, by @svgeesus.
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1 pull request merged.
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`mDCV` erratum #539 w3c/png#540.
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1 pull request received 7 new comments.
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[Extensions] Add iDOT to "Chunks Not Described Here", #530 w3c/png#541 (7 comments by @annevk, @chrisn, @leo-barnes, @svgeesus)
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GitHub
w3c/png
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1 issue opened.
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Rechartering 2025-2027 w3c/png#535, by @svgeesus.
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7 issues received 28 new comments.
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Proposal: gain maps for PNG w3c/png#380 (9 comments by @AMouri, @falhassen, @fintelia, @gregbenz, @leo-barnes, @ProgramMax, @svgeesus)
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Consider using Zstandard and/or LZ4 instead of Deflate w3c/png#39 (3 comments by @fintelia, @gsnedders, @ProgramMax)
GitHub
w3c/png
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2 issues opened.
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Add the Apple `iDOT` chunk to the PNG Extensions specification w3c/png#530, by @svgeesus.
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Negative chromaticity values w3c/png#527, by @svgeesus.
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1 issue closed.
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Negative chromaticity values w3c/png#527.
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5 issues received 24 new comments.
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Add the Apple `iDOT` chunk to the PNG Extensions specification w3c/png#530 (9 comments by @ronaldtse, @svgeesus)
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2 pull requests opened.
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Negative cHRM w3c/png#529, by @svgeesus.
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Negative values allowed in `cHRM` w3c/png#528, by @svgeesus.
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2 pull requests merged.
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Negative cHRM w3c/png#529.
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Negative values allowed in `cHRM` w3c/png#528.
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1 pull request received 6 new comments.
TR publications
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1 document published.
GitHub
w3c/png
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3 issues received 4 new comments.
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New filter method, optimised for 10,12,16 bits/component image data? w3c/png#426 (2 comments by @jbowler, @jonnyawsom3)
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7 pull requests opened.
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Back to Editors Draft of Fourth Edition w3c/png#526, by @svgeesus.
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Changes for 2025-06-24 W3C Recommendation w3c/png#525, by @svgeesus.
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Update README for W3C Recommendation, published today w3c/png#524, by @svgeesus.
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[ImpRpt] More passes for EXIF in PNG CSS tests w3c/png#522, by @svgeesus.
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WPT manual test results for Ladybird w3c/png#521, by @svgeesus.
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[ImpRpt] Firefox 141 passes APNG cICP inherit test w3c/png#520, by @svgeesus.
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7 pull requests merged.
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Back to Editors Draft of Fourth Edition w3c/png#526.
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Changes for 2025-06-24 W3C Recommendation w3c/png#525.
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[ImpRpt] More passes for EXIF in PNG CSS tests w3c/png#522.
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WPT manual test results for Ladybird w3c/png#521.
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[ImpRpt] Firefox 141 passes APNG cICP inherit test w3c/png#520.
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4 pull requests received 6 new comments.
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[ImpRpt] Ladybrd passes all ICC tests now. DaVinci Resolve supports `cICP` w3c/png#523 (3 comments by @chrisn, @ProgramMax, @svgeesus)
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TR publications
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1 document published.
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Portable Network Graphics (PNG) Specification (Third Edition) published as a Proposed Recommendation. History of Portable Network Graphics (PNG) Specification (Third Edition)
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GitHub
w3c/png
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1 issue closed.
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404s for PNG Third Edition specs w3c/png#516.
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3 issues received 5 new comments.
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Call for Consensus: Transition to Proposed Recommendation of PNG 3rd Edition w3c/png#512 (1 comment by @svgeesus)
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3 pull requests opened.
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Implementation report, better Exif section w3c/png#519, by @svgeesus.
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stub a brief README.md for visitors w3c/png#518, by @tantek.
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editorial: index.html use TR changes link, link to report source w3c/png#517, by @tantek.
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3 pull requests merged.
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Implementation report, better Exif section w3c/png#519.
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stub a brief README.md for visitors w3c/png#518.
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3 pull requests received 3 new comments.
GitHub
w3c/png
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2 issues opened.
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404s for PNG Third Edition specs w3c/png#516, by @JohnRiv.
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3 issues closed.
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Narrow range and `cICP` w3c/png#312.
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6 issues received 25 new comments.
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Call for Consensus: Transition to Proposed Recommendation of PNG 3rd Edition w3c/png#512 (11 comments by @annevk, @chrisn, @ctruta, @digitaltvguy, @leo-barnes, @ProgramMax, @simontWork, @svgeesus)
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Add PNG `hRWl` (HDR Reference White Level) chunk to conform to ISO 22028-5 w3c/png#390 (4 comments by @leo-barnes, @svgeesus)
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Consider using Zstandard and/or LZ4 instead of Deflate w3c/png#39 (2 comments by @inschrift-spruch-raum, @palemieux)
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3 pull requests opened.
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Clarify APNG w3c/png#514, by @jbowler.
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Firefox trns pass w3c/png#513, by @svgeesus.
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2 pull requests merged.
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Firefox trns pass w3c/png#513.
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1 pull request closed.
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Clarify APNG w3c/png#514.
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1 pull request received 14 new comments.
TR publications
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1 document published.
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Portable Network Graphics (PNG) Specification (Third Edition) published as a Candidate Recommendation Snapshot. History of Portable Network Graphics (PNG) Specification (Third Edition)
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GitHub
w3c/png
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1 issue opened.
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3 issues closed.
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Testing `cLLI` w3c/png#358.
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Testing `mDCV` w3c/png#359.
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SMPTE RP 2077 w3c/png#482.
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9 issues received 16 new comments.
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Consider using Zstandard and/or LZ4 instead of Deflate w3c/png#39 (2 comments by @palemieux, @ProgramMax)
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Call for Consensus: Publish a Candidate Recommendation Snapshot of PNG 3rd Edition w3c/png#503 (2 comments by @svgeesus)
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4 pull requests opened.
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Rename cicp_inserter to png_cicp_editor w3c/png#511, by @ProgramMax.
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[tools] Update w3c/png#509, by @svgeesus.
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CRS Mar 2025 w3c/png#508, by @svgeesus.
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[ImpRpt] Add cicp_inserter, improve description of pngcheck w3c/png#507, by @svgeesus.
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4 pull requests merged.
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Rename cicp_inserter to png_cicp_editor w3c/png#511.
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[tools] Update w3c/png#509.
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CRS Mar 2025 w3c/png#508.
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3 pull requests received 3 new comments.
Participants
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1 participant joined.
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Cosmin Truta (W3C Invited Experts) joined.
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GitHub
w3c/png
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3 issues opened.
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Filter suggestion improvement w3c/png#505, by @ProgramMax.
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Missing eXIf note from the Security Considerations section w3c/png#497, by @ctruta.
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4 issues closed.
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eXIf chunk authors/editors not added to list? w3c/png#486.
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12 issues received 29 new comments.
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Call for Consensus: Publish a Candidate Recommendation Snapshot of PNG 3rd Edition w3c/png#503 (10 comments by @annevk, @chrisn, @ctruta, @falhassen, @leo-barnes, @ProgramMax, @svgeesus)
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Consider using Zstandard and/or LZ4 instead of Deflate w3c/png#39 (3 comments by @birdie-github, @ProgramMax, @vrubleg)
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Add PNG `hRWl` (HDR Reference White Level) chunk to conform to ISO 22028-5 w3c/png#390 (1 comment by @ProgramMax)
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Pointless constraint in `fcTL`: non-negative `x_offset` and `y_offset` w3c/png#496 (1 comment by @ProgramMax)
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7 pull requests opened.
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Correct chunk spelling `mDCv` to `mDCV`, `cLLi` to `cLLI` w3c/png#506, by @svgeesus.
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Implementation report, feb 2025 update w3c/png#504, by @svgeesus.
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[editorial] Update changes list w3c/png#502, by @svgeesus.
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Added eXIf chunk authors/editors, fix #486 w3c/png#501, by @svgeesus.
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Add eXIf note to the Security Considerations section (#497) w3c/png#498, by @ctruta.
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7 pull requests merged.
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Implementation report, feb 2025 update w3c/png#504.
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[editorial] Update changes list w3c/png#502.
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Added eXIf chunk authors/editors, fix #486 w3c/png#501.
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1 pull request received 1 new comment.
TR publications
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1 document published.
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Portable Network Graphics (PNG) Specification (Third Edition) published as a Candidate Recommendation Draft. History of Portable Network Graphics (PNG) Specification (Third Edition)
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GitHub
w3c/png
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8 issues opened.
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Add iEId chunk w3c/png#495, by @ProgramMax.
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Add iEXt chunk w3c/png#494, by @ProgramMax.
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Adding generic image-type data chunk(s) w3c/png#493, by @ProgramMax.
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Typo in `mDCV` example w3c/png#488, by @svgeesus.
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eXIf chunk authors/editors not added to list? w3c/png#486, by @ProgramMax.
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2024 edition of ITU H.273 w3c/png#483, by @svgeesus.
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SMPTE RP 2077 w3c/png#482, by @svgeesus.
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4 issues closed.
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Typo in `mDCV` example w3c/png#488.
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2024 edition of ITU H.273 w3c/png#483.
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APNG implementation w3c/png#38.
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11 issues received 27 new comments.
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Tone-mapping should be stable when mDCv and cLLi are static w3c/png#319 (4 comments by @digitaltvguy, @jbowler)
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eXIf chunk authors/editors not added to list? w3c/png#486 (3 comments by @jbowler, @ProgramMax, @svgeesus)
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10 pull requests opened.
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[ImpRpt] Update for Firefox 136 implementing CICP w3c/png#492, by @svgeesus.
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[tools] Add Rust image-png, and unofficial pngcheck w3c/png#491, by @svgeesus.
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Update SVG figures for mDCV, cLLI w3c/png#490, by @svgeesus.
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Fix typo, #488 w3c/png#489, by @svgeesus.
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[Tools] Update for libpng cICP w3c/png#487, by @svgeesus.
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Fix ReSpec warning w3c/png#485, by @ProgramMax.
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Update to latest H.273, fix #483 w3c/png#484, by @svgeesus.
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Split changes w3c/png#481, by @svgeesus.
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Implementation Report update, Jan 2025 w3c/png#480, by @svgeesus.
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Correct leftover cLLi-chunk to cLLI-chunk, fix #477 w3c/png#479, by @svgeesus.
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10 pull requests merged.
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[ImpRpt] Update for Firefox 136 implementing CICP w3c/png#492.
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[tools] Add Rust image-png, and unofficial pngcheck w3c/png#491.
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Update SVG figures for mDCV, cLLI w3c/png#490.
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[Tools] Update for libpng cICP w3c/png#487.
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Fix typo, #488 w3c/png#489.
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Update to latest H.273, fix #483 w3c/png#484.
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Fix ReSpec warning w3c/png#485.
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Split changes w3c/png#481.
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Implementation Report update, Jan 2025 w3c/png#480.
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Correct leftover cLLi-chunk to cLLI-chunk, fix #477 w3c/png#479.
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4 pull requests received 11 new comments.