Add WebP support for PHP GD

[sean-e-dietrich]

Following Mike Hershel's Tweet https://twitter.com/mikeherchel/status/1053790762759008262

Confirmed that while Chrome is probably the ONLY browser that will support WebP processing. Chrome is widely used and found that CLI does not have WebP compiled.

5.6 Image has a different flag then 7.0+

[lmakarov]

We can certainly include WebP support in docksal/cli.

However and FYI, it is not currently supported on either Acquia or Pantheon.
So a project hosted with one of these providers won't be able to use WebP anyway.

Would be also good to know whether Platform.sh supports WebP or not. I don't have any projects there so cannot validate this.

---

Acquia

print_r(gd_info());
Array
(
    [GD Version] => bundled (2.1.0 compatible)
    [FreeType Support] => 1
    [FreeType Linkage] => with freetype
    [GIF Read Support] => 1
    [GIF Create Support] => 1
    [JPEG Support] => 1
    [PNG Support] => 1
    [WBMP Support] => 1
    [XPM Support] => 1
    [XBM Support] => 1
    [WebP Support] => 
    [JIS-mapped Japanese Font Support] => 
)

Pantheon

print_r(gd_info());
Array
(
    [GD Version] => bundled (2.1.0 compatible)
    [FreeType Support] => 1
    [FreeType Linkage] => with freetype
    [GIF Read Support] => 1
    [GIF Create Support] => 1
    [JPEG Support] => 1
    [PNG Support] => 1
    [WBMP Support] => 1
    [XPM Support] => 1
    [XBM Support] => 1
    [WebP Support] => 
    [JIS-mapped Japanese Font Support] => 
)

Docksal (docksal/cli:2.5-php7.1)

print_r(gd_info());
Array
(
    [GD Version] => bundled (2.1.0 compatible)
    [FreeType Support] => 1
    [FreeType Linkage] => with freetype
    [GIF Read Support] => 1
    [GIF Create Support] => 1
    [JPEG Support] => 1
    [PNG Support] => 1
    [WBMP Support] => 1
    [XPM Support] => 
    [XBM Support] => 1
    [WebP Support] => 
    [JIS-mapped Japanese Font Support] => 
)

[sean-e-dietrich]

Platform.sh does have support for WebP.

[achekulaev]

I almost feel like we need a repo/doc of common cli extensions in form of repo with Dockerfiles, so that instead of adding those yet-another-tool-someone-needs things to the cli image we could just show people how to easily get those on the per-project basis using custom Dockerfile example from that repo/doc.

[lmakarov]

@sean-e-dietrich tests are still failing and we now also need to add PHP 7.3 support.

[sean-e-dietrich]

@lmakarov just checked and the build is now passing we were missing a few packages. Additionally looks like the support has also been translated for PHP7.3 now too.