[wp-trac] [WordPress Trac] #35725: Add WebP support.

WordPress Trac noreply at wordpress.org
Thu Apr 1 14:21:09 UTC 2021

#35725: Add WebP support.
 Reporter:  markoheijnen                         |       Owner:
                                                 |  adamsilverstein
     Type:  enhancement                          |      Status:  assigned
 Priority:  normal                               |   Milestone:  5.8
Component:  Media                                |     Version:  3.5
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-testing has-unit-    |     Focuses:
  tests needs-dev-note dev-feedback              |

Comment (by adamsilverstein):

 >  I'm wondering if WordPress should detect when a lossless image is
 uploaded, and generate lossless resizes?

 Good idea, I agree the expectation when uploading a lossless image is the
 subsizes should also be lossless.

 Imagick will only use lossless if we set the quality to 100 or above then
 call `$img->setOption('webp:lossless', 'true');`, so we need to do that
 manually. With LibGD we need to set the quality to `gdWebpLossless`.

 For WebP uploads, the patch already includes code that reads a WebP header
 and determines the file type, which we could use. For other formats, we
 can tell lossy/lossless by the file type.

Ticket URL: <https://core.trac.wordpress.org/ticket/35725#comment:146>
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