`libwebp` cannot be used to perform resize operations on webp images on
the server.
This commit uploads all resizes of webp images whenever a webp image is
uploaded:
- resized to any smaller size in 1024, 512, 256 & 128,
- each size converted to jpg as well to be usable in `wkhtmltopdf`.
When an Image field requires `_imageProcessing` to resize a webp image,
it retrieves the pre-resized image instead of running through the
Pillow toolbox.
Pre-converted images are stored as `ir.attachment`s with:
- `res_model` = ir.attachment
- `res_id` = id of transformed attachment
i.e. id of original size webp for resized images
id of webp for jpeg-converted images
- `description` = "format: image/jpeg" for jpeg conversions,
"resize: [size]" for resized images.
task-2774352
Part-of: odoo/odoo#85494
Benoit Socias
0ba3617f9d