FEATURE: Allow the format avif for thumbnail generation.

[mficzel]

As with webp the format has to be supported by the library behind imagine aswell.
Currently avif is only supported by imagick > 7.0.10-25 and libheif > 1.7.0.

Resolves: #3132

[bwaidelich]

by reading

[mficzel]

@jonnitto please test wether this works. My imagick is probably not new enough an creates jpeg files with an avif ending which is what is to be expected for older imagick versions.

[jonnitto]

Unfortunately, this will not work yet, the imagine/imagine package doesn't support avif yet. I created an issue on their repo

[markusguenther]

Guess it will take time until imagine/imagine supports that because the say the GraphicsMagick does not support that and only a newer version of ImageMagick has the support.

[mficzel]

Converted to draft until imagine has been updated

[markusguenther]

Maybe that's also helpful for us :)
php/php-src#7026

[morsssss]

Indeed! AVIF support is now available in libgd now, and it is also set to be part of PHP 8.1.

[mficzel]

Since php 8.1 and imagine support avif now we should pick this up again. We will probably have to check the imagine dependencies

[bwaidelich]

@mficzel +1 for picking this one up again. I suggested this change for the 7.3 release. But I think the PR needs to be re-created against the current master

[mficzel]

@bwaidelich rebased on master

[bwaidelich]

Thanks <3