[wp-trac] [WordPress Trac] #63448: Image quality significantly degrades for resized PNGs with transparency in WordPress 6.8.1

[WordPress Trac]

#63448: Image quality significantly degrades for resized PNGs with transparency in
WordPress 6.8.1
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 Reporter:  elvismdev                            |       Owner:
                                                 |  adamsilverstein
     Type:  defect (bug)                         |      Status:  reopened
 Priority:  normal                               |   Milestone:  6.8.2
Component:  Media                                |     Version:  6.8
 Severity:  critical                             |  Resolution:
 Keywords:  has-patch has-test-info dev-         |     Focuses:
  feedback has-unit-tests commit fixed-major     |
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Comment (by nosilver4u):

 Oh, and by the way, I looked up the difference between `getColorspace` and
 `getImageColorspace`, as I was curious also. `getColorspace` returns the
 "global colorspace", whereas `getImageColorspace` returns the colorspace
 for the current image.

 Since @siliconforks' testing seems to indicate the global colorspace is
 typically undefined, it makes me think the usage of `getColorspace` within
 `quantizeImage` is really just telling ImageMagick to use whatever
 colorspace the image already has, in order to avoid hard-coding a
 colorspace that might mess up the image.

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Ticket URL: <https://core.trac.wordpress.org/ticket/63448#comment:67>
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