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Better compress options for ico#8581

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STPR wants to merge 5 commits intoImageMagick:mainfrom
STPR:main
Open

Better compress options for ico#8581
STPR wants to merge 5 commits intoImageMagick:mainfrom
STPR:main

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@STPR STPR commented Feb 26, 2026

  • I've added a compress option "All" to compress all subimages as PNG.
  • If the compress option "Zip" is defined, any subimage with dimensions ≥ 256x256 are compressed.
  • If the compress option is undefined, no subimages are compressed.

Fixes #8578, fixes #2394

TODO: Modify the documentation accordingly.

STPR added 5 commits February 26, 2026 22:32
Added a compress option "All" to compress all subimages as PNG. If the compress option "Zip" is defined, only subimages with dimensions 256x256 are compressed. If no compress option are defined, no subimages are compressed.
Some corrections for ICONDIRENTRY.
Minor corrections
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Since the pull request #8569, there's no possibility to reduce the size of ico files for icons sizes equal to 256x256 How to force PNG storage format in ICO?

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