Issues

• Progressive rendering WPT reftests for PNG

  needs testcase (wpt)Priority: Eventually
  w3c/png#582 · Filter by author svgeesus opened on Sep 24, 2026
  9

  

• Reject critical chunks in APNG frame-data sequences - #903

  w3c/png#579 · Filter by author svgeesus opened on Aug 19, 2026 · 4th edition
  1

• Unclear tIME restrictions

  w3c/png#572 · Filter by author Oondanomala opened on Jun 20, 2026 · 4th edition
  3

• Improve section 7.2 Scanlines

  documentationneeds resolved discussion
  w3c/png#552 · Filter by author ghost opened on Dec 30, 2025

• Browsers are not handling BT.2020 images correctly

  implementations
  Bug

  w3c/png#538 · Filter by author svgeesus opened on Sep 5, 2025 · 3rd edition
  7

• 5th edition meta-issue

  w3c/png#537 · Filter by author ProgramMax opened on Sep 3, 2025 · 5th edition
  2

• 4th edition meta-issue

  w3c/png#536 · Filter by author ProgramMax opened on Sep 3, 2025 · 4th edition
  2

• Filter suggestion improvement

  documentation
  w3c/png#505 · Filter by author ProgramMax opened on Feb 21, 2025 · Future edition considerations
  1

• Add iEId chunk

  needs resolved discussion
  Feature

  w3c/png#495 · Filter by author ProgramMax opened on Jan 29, 2025 · Future edition considerations
  7

• Add iEXt chunk

  needs resolved discussion
  Feature

  w3c/png#494 · Filter by author ProgramMax opened on Jan 29, 2025 · Future edition considerations
  6

• Adding generic image-type data chunk(s)

  needs resolved discussion
  Feature

  w3c/png#493 · Filter by author ProgramMax opened on Jan 29, 2025 · Future edition considerations
  1

• Join chunk ordering rules

  w3c/png#467 · Filter by author ProgramMax opened on Sep 28, 2024 · Future edition considerations
  10

• New filter method, optimised for 10,12,16 bits/component image data?

  backwards-incompatibleenhancement
  w3c/png#426 · Filter by author svgeesus opened on Feb 21, 2024 · Future edition considerations
  9

• Consistent terminology

  w3c/png#405 · Filter by author chrisn opened on Jan 8, 2024 · Future edition considerations
  8

  

• Proposal: gain maps for PNG

  enhancementneeds resolved discussion
  w3c/png#380 · Filter by author svgeesus opened on Nov 15, 2023 · 4th edition
  53

• Liaison letter from ISO TC 42/WG 23 on Gain Maps

  w3c/png#366 · Filter by author svgeesus opened on Nov 7, 2023 · 4th edition
  7

• 10 bit per channel proposal

  needs resolved discussion
  w3c/png#357 · Filter by author Myndex opened on Oct 24, 2023 · Future edition considerations
  13

• Should the spec still talk about frame buffers?

  w3c/png#347 · Filter by author fintelia opened on Aug 16, 2023 · Future edition considerations
  1

• Flag for use of artistic controls

  enhancement
  w3c/png#344 · Filter by author simontWork opened on Aug 15, 2023 · Future edition considerations
  2

• Dark mode

  documentationPriority: Eventually
  w3c/png#338 · Filter by author svgeesus opened on Aug 4, 2023
  2

• Handling invalid, unknown ancillary chunks

  question
  w3c/png#320 · Filter by author svgeesus opened on Jul 1, 2023
  12

• Tone-mapping should be stable when mDCv and cLLi are static

  w3c/png#319 · Filter by author palemieux opened on Jun 12, 2023 · 4th edition
  25

  

• Link to tables and figures by name

  w3c/png#308 · Filter by author ProgramMax opened on May 1, 2023 · Future edition considerations
  6

  

• Consider improvements to progressive loading

  needs resolved discussion
  w3c/png#255 · Filter by author ProgramMax opened on Jan 17, 2023 · Future edition considerations

• Natural image resolution, CSS. web compat, and pHYs

  documentationneeds resolved discussionPriority: Eventually
  w3c/png#97 · Filter by author svgeesus opened on Feb 28, 2022 · Future edition considerations
  10