[wp-trac] [WordPress Trac] #54476: Improve image engine detection when output format adjusted with filter (example: WebP output)

[WordPress Trac]

#54476: Improve image engine detection when output format adjusted with filter
(example: WebP output)
-------------------------------------+------------------------------
 Reporter:  adamsilverstein          |       Owner:  adamsilverstein
     Type:  defect (bug)             |      Status:  assigned
 Priority:  normal                   |   Milestone:  6.1
Component:  Media                    |     Version:  5.8
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-testing  |     Focuses:
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Comment (by mikeschroder):

 Some additional details:
 I’m trying to test this, but having difficulty creating the conditions at
 the moment.
 It looks like turning off WebP via `policy.xml` yields existing but empty
 WebP files. 😅

 I believe this due to an existing issue with Imagick not reflecting format
 availability based on `policy.xml`, which (slightly off-topic) it’d be
 great if we had some way of detecting.

 In the meantime, it makes it a bit harder to test. If anyone has any
 recommendations, it'd be appreciated!

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Ticket URL: <https://core.trac.wordpress.org/ticket/54476#comment:15>
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