cairo-1.18.0 (we may need a gimp fix)

[ken@…]

New minor version.

I've just seen a report on pixls.us that latest cairo broke the curves tool on gimp ​https://discuss.pixls.us/t/what-happened-to-gimp-curves/35232 and that arch have fixed it with a revert in their 1.17.8-2 build:

# https://bugs.archlinux.org/task/77432
# https://gitlab.freedesktop.org/cairo/cairo/-/issues/639
git revert -n 47a21c6e30eef91db503a5a183d5c8cf558aaa56

Ignore the comment there that the revert doesn't fully fix it, comments 14,15 at pixls.us explains that.

Looks like it might be a bug in gimp code

https://gitlab.gnome.org/GNOME/gimp/-/issues/9132

but reverting whatever is in that commit as a tmeporary measure might be easier.

[ken@…]

There is a first attempt at a gimp fix referenced on that ticket, further fix proposed to avoid divide by zero.

[Bruce Dubbs]

It's a gimp problem.

Please check the diff at ​https://gitlab.gnome.org/GNOME/gimp/-/commit/2d59d233efd4616b312bb3ca205af9fe86cb6998

sed -e '/(bg_color)/i    \
  y    = MAX (y,    0);  \
  bg_y = MAX (bg_y, 0);' \
    -i app/widgets/gimphistogramview.c

I checked that the sed above applies, but have not rebuilt gimp.

[ken@…]

Replying to Bruce Dubbs:

It's a gimp problem.

Please check the diff at ​https://gitlab.gnome.org/GNOME/gimp/-/commit/2d59d233efd4616b312bb3ca205af9fe86cb6998

sed -e '/(bg_color)/i    \
  y    = MAX (y,    0);  \
  bg_y = MAX (bg_y, 0);' \
    -i app/widgets/gimphistogramview.c

I checked that the sed above applies, but have not rebuilt gimp.

Thanks. I thought we were using 1.17.8, but unless my local copy of the book has totally missed it we are still on 1.17.6. I've just posted on -dev about that, 1.17.8 is in a snapshots directory.

Now using meson, and the GL and GLES backends have been removed.

[ken@…]

If we are not going to use 1.17.8 then there is no way of testing if the sed will solve the problem, and no need. Closing as invalid.

[pierre]

Actually, only cairo-1.16.O is deemed stable by cairo website. But GNOME have been using the 1.17 series in their downloads. So I suspect cairo-1.17.8 will land into gnome downloads soon. Reopening, since we might want to keep an eye on this.

[ken@…]

Meanwhile, we have updated to babl-0.1.102 and gegl-0.4.42.

With that version of babl, the installed pkgconfig file is now /usr/lib/pkgconfig/babl-0.1.pc instead of the previous /usr/lib/pkgconfig/babl.pc, causing gimp-2.10.23 to fail to configure:

Error: GIMP configuration failed.

  - Error: missing dependency babl >= 0.1.78

I think we want a separate ticket for gimp-2.10.34.

[Xi Ruoyao]

Cairo-1.18.0 is now available at ​https://gitlab.freedesktop.org/cairo/cairo/-/archive/1.18.0/cairo-1.18.0.tar.gz. It's clearly a stable release but I don't know if a tarball will be uploaded to download.gnome.org.