Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:116615
MIME-Version: 1.0
References: <CAA6+j4tx8ZadUi_P7y-o_U0eN+UsW38FvBYBk_EDHTpdMTTLVQ@mail.gmail.com>
 <7c4411c8-8bf6-36f1-36f8-1a7391c2a3d7@gmx.de> <CAF+90c_PjHD5NqmZxAiWhnrrRnpYcYW=xEt_YyFL2sZFoJFsug@mail.gmail.com>
In-Reply-To: <CAF+90c_PjHD5NqmZxAiWhnrrRnpYcYW=xEt_YyFL2sZFoJFsug@mail.gmail.com>
Reply-To: Ben Morss <morss@google.com>
Date: Thu, 9 Dec 2021 16:30:11 -0500
Message-ID: <CAA6+j4sM7OPTYUub2mOanw64iCHRevKa5xduU-L80rftnrQAGg@mail.gmail.com>
To: Nikita Popov <nikita.ppv@gmail.com>
Cc: "Christoph M. Becker" <cmbecker69@gmx.de>, PHP internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary="000000000000ac95da05d2bd50f5"
Subject: Re: [PHP-DEV] Re: Finishing AVIF support in getimagesize()
From: internals@lists.php.net ("Ben Morss via internals")

--000000000000ac95da05d2bd50f5
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Thanks for the discussion, everyone!

Fortunately there are no licensing concerns, as the author is making this
code available to be copied and pasted freely. And we've already got the
build flag for avif.

I'll be excited to see getimagesize() actually return the size for AVIF
images =E2=98=BA=EF=B8=8F


On Thu, Dec 9, 2021 at 2:45 PM Nikita Popov <nikita.ppv@gmail.com> wrote:

> On Wed, Dec 8, 2021 at 12:41 PM Christoph M. Becker <cmbecker69@gmx.de>
> wrote:
>
>> On 01.12.2021 at 00:52, Ben Morss via internals wrote:
>>
>> > Earlier this year, I added support for AVIF images
>> > <https://github.com/libgd/libgd/pull/671> to libgd
>> > <https://github.com/libgd/libgd>. My ultimate goal was to bring
>> support for
>> > this new image format to PHP, so that the world's top CMSs could let
>> sites
>> > serve AVIFs. A few of you kindly guided me as I made my first
>> contributions
>> > to the PHP codebase, propagating libgd's new AVIF support
>> > <https://github.com/php/php-src/pull/7026> into PHP's bundled gd fork,
>> > and adding
>> > AVIF awareness <https://github.com/php/php-src/pull/7091> to non-gd
>> > functions like getimagesize() and imagecreatefromstring().
>> >
>> > Unfortunately, when I worked on getimagesize(), AVIF experts advised
>> that
>> > there was no compact, reliable way to determine the size of an AVIF
>> image
>> > without relying on an external library like libavif. We decided
>> > <https://github.com/php/php-src/pull/5127#issuecomment-799825277> that
>> it
>> > was useful to return the information that a given image was an AVIF, b=
ut
>> > simply to return 0 for the actual dimensions and other details. The us=
er
>> > would simply need to decode the image to determine this information.
>> >
>> > Of course, users would really like
>> > <https://github.com/php/php-src/pull/5127#issuecomment-976241397> to
>> use
>> > getimagesize() to return the actual size. So a colleague has kindly
>> > created standalone
>> > code <https://aomedia-review.googlesource.com/c/libavifinfo/+/148321>
>> (that
>> > doesn't depend on libavif) to do this, with the goal of adding it to
>> PHP.
>> >
>> > The code comprises several hundred lines. But - it works, and it works
>> well.
>> >
>> > Would it be ok to submit a PR containing this code to add this
>> > functionality? Or does someone have a superior approach?
>>
>> Thanks for your and your colleague's work!  It's highly appreciated.
>>
>> Anyhow, a respective PR[1] has been submitted now, and I'm in favor of
>> bundling libavifinfo.  I'm not too concerned regarding the additional
>> size of the PHP binaries which would result by linking it in, but if
>> others are, we could still introduce a configuration option (e.g.
>> `--with-libavifinfo`).
>>
>> Thoughts?  Objections to bundling libavifinfo at all?
>>
>> [1] <https://github.com/php/php-src/pull/7711>
>>
>
> Assuming no licensing concerns, bundling libavifinfo sounds reasonable.
> The library is small, our avif functionality is incomplete without it, an=
d
> we can't expect this to be available as a system library at this time.
>
> Regards,
> Nikita
>

--000000000000ac95da05d2bd50f5--