display libavif version and codecs via phpinfo()

[andypost]

I find it helpful for debug to see which libavif version is linked

[andypost]

@morsssss probably it could be cleaned-up a bit but works for me

[cmb69]

If we do that, we should do it for the other libs (libjpeg etc.) as well. And wrt. avif, the available codecs would be of interest.

[andypost]

Good idea, gonna work on it

[andypost]

I checked libjpeg-turbo and libwebp installed on Ubuntu 21.10 (beta) and I can't find API to get version

Probably each library needs to define versions via pkgconf

$ php --ri gd

gd

GD Support => enabled
GD Version => bundled (2.1.0 compatible)
GIF Read Support => enabled
GIF Create Support => enabled
PNG Support => enabled
libPNG Version => 1.6.37
WBMP Support => enabled
XBM Support => enabled
BMP Support => enabled
AVIF Support => enabled
AVIF Version => 0.8.4
AVIF Codecs => dav1d [dec]:0.7.1, libgav1 [dec]:0.16.1
TGA Read Support => enabled

Directive => Local Value => Master Value
gd.jpeg_ignore_warning => 1 => 1

[andypost]

version string only available with bundled GD

[cmb69]

On further consideration, I don't think this is the right approach. Instead libgd could provide the version information, and then we could use their API. I suggest to file a feature request or submit a pull request there.

[andypost]

@cmb69 thank you! filed libgd/libgd#782

[mondrake]

I would be very +1 on getting this is in while a GD lib solution is found - it's rather simple and I cannot see a negative side effect - while the GD lib way will take much longer to get in PHP.

In Drupal we are trying to get AVIF support (https://www.drupal.org/project/drupal/issues/3202016), but there's currently no way to introspect AVIF support and report if anything is missing in the configuration - gdinfo() and the relative imageavif() functions are there, can be tested against, but still calling imageavif() without a coder leads to an error. That's a rather fragile status. With this we could check if codecs are missing and report to site admins.

[cmb69]

I would be very +1 on getting this is in while a GD lib solution is found - it's rather simple and I cannot see a negative side effect - while the GD lib way will take much longer to get in PHP.

Well, this patch is only for bundled libgd (and I don't think this is usually used, except on Windows), so a solution in libgd would be needed for other builds.

[andypost]

Sounds like there's good progress in 8.4 85e5635

[andypost]

one more bit is fixed 0079932