[wp-trac] [WordPress Trac] #12120: Force Media Image Generation (for thumbnails)

[WordPress Trac]

#12120: Force Media Image Generation (for thumbnails)
-------------------------+--------------------------------------------------
 Reporter:  atow         |       Owner:                 
     Type:  enhancement  |      Status:  new            
 Priority:  normal       |   Milestone:  Future Release 
Component:  Media        |     Version:  2.9.1          
 Severity:  normal       |    Keywords:  media thumbnail
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 It would be very useful to force the generation of a thumbnail images for
 uploaded files. With content being syndicated to feeds, e-readers, and
 mobile devices, the ability to have a working thumbnail is more important.

 For example, if the original image has dimensions of 250x50, and the
 default thumbnail size in WP is 150x150, a thumbnail will not be generated
 because the 50 height is smaller than the 150 pixel minimum.

 The fix would be to include an additional parameter to the
 image_resize_dimensions to allow the function the dimensions. A filter
 could be applied to allow the user to set which images should force the
 generation of a resized image (i.e. to exclude a medium and large image
 from being generated for a 250x50 image) by passing in the original
 width/height and max width/height.

 in wp-includes/media.php

 ========

 function image_resize( $file, $max_w, $max_h, $crop = false, $suffix =
 null, $dest_path = null, $jpeg_quality = 90 ) {

 ...

 $force = apply_filters('image_resize_dimensions_force', $orig_w, $orig_h,
 $max_w, $max_h);
 $dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop,
 $force);

 ========

 function image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop
 = false, $force = false) {
 ...

 // if the resulting image would be the same size or larger we don't want
 to resize it
         if ( $new_w >= $orig_w && $new_h >= $orig_h && !$force )
                 return false;

-- 
Ticket URL: <http://core.trac.wordpress.org/ticket/12120>
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