Add compatibility with "WP Retina 2x" plugin back

[Screenfeed]

WP Retina 2x was supported before we introduce webp support, and dropped because lack of time to adapt it to the new architecture.

[NicholasRBowers]

Could also tag this as a feature request - if Imagify (or Imagify + WP Rocket) automatically generated and re-wrote URLs to serve @2x retina files, there wouldn't be a need for WP Retina 2x. I believe Optimole does this automatically.

[KingGrizzly]

What's the latest on retina support? Thanks.

[Klemart3D]

Any news about this issue? Why Imagify couldn't directly include a Retina image management, so no need to be compatible with a 3rd party plugin 🤔?

[tnowak]

The only issue with WP Retina 2x compatibility I see is that Imagify plugin does not create .webp images for:

• full size Retina image (original@2x.png) --> no original@2x.png.webp created
• other sizes such as thumb-150x150@2x.png --> no thumb-150x150@2x.png created

That issue should be very easy to fix. Sure, I can run a cron to cwebp all *2x.png's in the wp-uploads folder, but it would be much easier if Imagify do that.

[piotrbak]

@iCaspar Whenever you have a couple of seconds, could you groom this issue?

[iCaspar]

The WP Retina 2x plugin is now called Perfect Images. See https://wordpress.org/plugins/wp-retina-2x/ We can start by grabbing the Imagify-WPR2x compat code as it was just before it was removed: commit #68c489b4 From there, we will need to adapt it to the "new" Imagify architecture, and integrate it with Imagify's webp functionality. There is quite a bit of code there to review/adapt/refactor and update to make sure we're covering changes that have also occurred in WPR2x in the interim.

Estimate: [L]

[saranshj4]

https://secure.helpscout.net/conversation/2670983912/506108?folderId=676697

[saranshj4]

https://secure.helpscout.net/conversation/2712929608/513254/

[saranshj4]

https://secure.helpscout.net/conversation/2763937495/523504?viewId=8160051