[wp-trac] [WordPress Trac] #21295: Retrospectively generate new images sizes if requested

[WordPress Trac]

#21295: Retrospectively generate new images sizes if requested
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 Reporter:  TwoThirdsWater   |      Owner:
     Type:  feature request  |     Status:  new
 Priority:  normal           |  Milestone:  Awaiting Review
Component:  General          |    Version:
 Severity:  normal           |   Keywords:
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 At present the image variations are created at the moment the image is
 uploaded to the server. If a new image size is later added, or the default
 ones changed after an image is uploaded then the existing images are not
 adjusted.

 Whilst there are plugins that provide - regenerate thumbnail functionality
 it might be neater if an image size is requested that doesn't exist that
 the system generates it at the time it is requested. This only need happen
 once per image as once it is created it doesn't need to be created again.

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Ticket URL: <http://core.trac.wordpress.org/ticket/21295>
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