Implement browser-side resizing with Plupload

[johnbillion]

#19174 removed the browser-side image resizing due to browser inconsistencies. We should fix it and reintroduce the feature.

A little related: #14459

+1 altough I think it depends on Plupload itself to fix the inconsistencies, no?

Hm... what are inconsistencies with Plupload?

Replying to jayarjo:

Hm... what are inconsistencies with Plupload?

See comment:ticket:19174:3.

Thanks for the link, although couldn't viably figure out what was expected behavior from Plupload's side..? I left a comment there but thread seems to be closed now. If we can come up with strict requirements for it, I could help to make it consistent.

I don't mean to spam this bug, but since this was the page google pointed me when I was looking for how to enable back client-side image resize before uploading to wordpress, I think it can be useful to write the workaround / way to turn that feature back on again (WP 3.4.1) while it doesnt get properly reintroduced…

add_action( 'post-upload-ui', 'media_upload_max_image_resize' ); 

Related #21407

Replying to fczuardi2:

I think it can be useful to write the workaround / way to turn that feature back on again (WP 3.4.1) while it doesnt get properly reintroduced…

add_action( 'post-upload-ui', 'media_upload_max_image_resize' ); 

FWIW, I've been adding the action back via a ​plugin since it was decided to remove it in #19174. I rewrote the language a bit but haven't had any reported problems. Uploading & resizing multiple photos works for us in FF14, Safari 6, Chrome 21, Opera 12 and IE9.