Regenerating BIG Images Edited by User

[ddur]

Bug Report

Test case 1, Step 1

As first step, just upload JPEG image that is larger than your current setting for 'big_image_size_threshold' (default is 2560 pixels). That would trigger automatic SCALING of image, on upload (see function wp_create_image_subsizes() in image.php).
Make sure that your 'big_image_size_threshold' filter is not disabled or has value higher than your image pixel sizes.

Test case 2, Step 1

Another test would be to upload JPEG image with exif metadata [orientation] set to 2, 3 or 4. That would trigger automatic ROTATING of image on upload (see function wp_create_image_subsizes() in image.php), regardless of 'big_image_size_threshold'.

Further Test Steps for Test cases 1 & 2

Step 2: Edit the image (resize, rotate or flip etc) to get new metadata [sizes] set with edited images (where names are changed by new dimensions (WxH) and suffixing base-name with '-e' + 13 numeric characters).

Step 3: Regenerate the thumbnails.

Result: As far as I can read the code, edited image won't be attached anymore and in attachment metadata, edited thumbnails will be replaced with original thumbnails as created at upload.

Preconditions to be met:

This case is related only to NOT PNG ( == JPEG and maybe more?) type of images.

Original issue: Automattic/regenerate-thumbnails#102

Attn: @azaozz

[swissspidy]

Steps, in other words, from Automattic/regenerate-thumbnails#102:

• Upload a large JPG image. One dimension must be higher than 2560. It must be a JPG, not a PNG (it's possible that other formats have the same problem).
• Edit the uploaded image (rotate or flip will make it most obvious).
• Regenerate thumbnails for the image using this plugin.
• After regenerating, the image in the Media Library is reverted to the pre-edited version.