[D7] Add webp support for core image module

Thank you danyg! Patch worked. But after after node save i see:

PDOException: SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'field_slideimage_width' at row 1: INSERT INTO {field_data_field_slideimage} (entity_type, entity_id, revision_id, bundle, delta, language, field_slideimage_fid, field_slideimage_alt, field_slideimage_title, field_slideimage_width, field_slideimage_height) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9, :db_insert_placeholder_10); Array ( [:db_insert_placeholder_0] => node [:db_insert_placeholder_1] => 24 [:db_insert_placeholder_2] => 24 [:db_insert_placeholder_3] => slide [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => und [:db_insert_placeholder_6] => 36 [:db_insert_placeholder_7] => [:db_insert_placeholder_8] => [:db_insert_placeholder_9] => [:db_insert_placeholder_10] => ) в функции field_sql_storage_field_storage_write() (строка 610 в файле /home/u8615/domains/moybuhgalter.com.ua/modules/field/modules/field_sql_storage/field_sql_storage.module).

today php 5.6
ok i try to update php version
thanx, danyg!

I have applied the patch #2 in drupal 7.80 and checked the support of webp images.

Testing steps:

1. installed drupal 7.80.
2. Added webp file extension in image field of article content type.
3. Created an article content where I have uploaded .webp image.
4. Webp image appearing fine for me.

Adding after patch screenshots for reference.

Patch looks good. Adding a related issue as if that backport gets commited with any luck, then we should be able implement more generic solution, instead of this hardcoded one (such as the one currently present in D8/9).

Until that this patch works for us on PHP 7.1+

Let's postpone this for #2539478: [D7] Allow image fields to use any extensions the current image toolkit supports (instead of hard-coding jpg, png and gif only) to aim for a generic solution (not the hardcoded one).

I don't know why we're trying to add this to D7 at this point. Bumping it up to D10. Hopefully we don't have to wait till 11.

AVIF & WebP are already ready to roll:
https://caniuse.com/?search=avif
https://caniuse.com/?search=webp

As far as I know, D10 currently supports WebP without the need of any additional module, so this is only a D7 issue. The original issue is here: #2340699: Let GDToolkit support WEBP image format

D10/11 Avif issue is here: #3202016: Let GDToolkit support AVIF image format.

I agree that it is possible, that this would not move anywhere until the EOL, but let's keep the relevant issues open until then. Thanks!