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Adam Silverstein 97ed38471b
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Media: fix degraded handling for 24 bit PNG uploads.
Add additional logic to correctly identify indexed PNG images so output PNGs correctly  match the uploaded image depth.

Fix a regression introduced in WordPress 6.8 [59589] where uploaded Truecolor PNG images (meaning > 8 bit) were mis-identified as indexed (8 bit) images, causing output images to be indexed instead of Truecolor resulting in a noticeable visual degradation. 

Props elvismdev, wildworks, SirLouen, siliconforks, joemcgill, iamshashank, nosilver4u.
Fixes #63448.




git-svn-id: https://develop.svn.wordpress.org/trunk@60246 602fd350-edb4-49c9-b593-d223f7449a82
2025-05-22 21:38:22 +00:00
..