[wp-trac] [WordPress Trac] #21389: Retina theme custom headers

[WordPress Trac]

#21389: Retina theme custom headers
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 Reporter:  nacin                                |       Owner:  joemcgill
     Type:  task (blessed)                       |      Status:  assigned
 Priority:  normal                               |   Milestone:  4.4
Component:  Customize                            |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  responsive-images has-patch 2nd-     |     Focuses:
  opinion                                        |
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Comment (by azaozz):

 21389.2.diff is same as 21389.1.diff but always generates srcset and
 sizes, then lets the theme overwrite them (by setting them in the $attr
 array).

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Ticket URL: <https://core.trac.wordpress.org/ticket/21389#comment:30>
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