News and History of the PNG Development Group from 2017

Herein lie news items and historical stuff primarily of interest to the Portable Network Graphics Development Group itself. Feel free to poke around even if you're not a member, though. Note that some of the links, particularly the older ones, are broken; in some cases this is explained by later entries. Other links (CompuServe, tcg.arl.mil) have fallen prey to reorganizations or upgrades; should they ever reappear, the entries below will be updated as needed.

Keep in mind that this is history here...

• current - see here

• 29 September 2017 - libpng 1.6.34 is released with fixes for some oss-fuzz issues and an off-by-one error in png_do_check_palette_indexes(), as well as the usual minor cleanups.

• 28 September 2017 - libpng 1.6.33 is released and almost immediately pulled due to some last-minute pngsuite additions that broke "make test".

• 24 August 2017 - libpng 1.6.32 is released with fixes for a possible NULL dereference in png_handle_eXIf() (new in 1.6.31) and a memory leak in the same when returning with an error, along with various other fixes to the function. It includes a few other OSS-fuzz fixes, as well as numerous small fixes and improvements.

• 27 July 2017 - libpng 1.6.31 is released with support for the recently approved eXIf chunk as well as a number of minor build fixes.

• 13 July 2017 - The eXIf chunk is approved at along last. PNG finally includes a formal mechanism for inclusion of photographic metadata in EXIF format.

• 28 June 2017 - libpng 1.6.30 is released with a fix for empty IDAT chunks, documentation updates, checks for integer overflows in contributed utilities visupng and genpng, and other minor fixes.

• 16 March 2017 - libpng 1.6.29 is released with new PowerPC optimizations, and it moves the SSE2 code into the main distribution.

• 15 January 2017 - zlib 1.2.11 is released with fixes for "a bug and an issue" in 1.2.10. Note that there are reports that while the 32-bit x86 assembler code works fine, the 64-bit version does not work on Windows (size of long differs from Linux), and it's unclear whether it works entirely correctly even on Linux. Only the C code is officially supported.

• 5 January 2017 - libpng 1.6.28 is released with a workaround for a bug exposed by building with the new versions of zlib.

• 2 January 2017 - zlib 1.2.10 is released with fixes for two serious bugs in 1.2.9. (Oops.)

• 1 January 2017 - zlib 1.2.9 is released.

Here are some related PNG pages at this site:

• Current News of the PNG Development Group
• Historical PNG news:
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• History of PNG
• Current Status of PNG

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