I am developing a relatively simple WordPress plugin for a client. It is used to upload/select images which are then saved (as image path) in the option variables and used as full-background images for the website's different categories/pages/etc..
Since images are of "wallpapery nature" (i.e. big) I added a custom image size with a maximum width of 1920 pixels (height is set to "auto", i.e. no image cropping). And that part also works, upon upload, images are being resized to my custom 1920 px width.
Now, the thing is, for uploading/choosing the background image I'm using the new media uploader and it works except that the chosen image (path) is always for the original uploaded image, for example "my-background-image.jpg".
My question is: is there a way to enable users (or make the uploader do it automatically) to select the 1920 px sized version of the original image, for example "my-background-image-1920x1080.jpg"?