fontconfig

[bjarthur]

the problem with using Compose, Cairo, Fontconfig on master is due at least in part to const no longer working in local scopes. src/pango.jl is included within link_fontconfig() and the lib strings defined therein are hence not constant when ccall needs them to be.

[Mattriks]

and other issues on master ...

Another issue is that there are 4 images missing in the latest docs, which appear in stable. These images all use LCHab color - has the Colors package been added to the environment in which the docs are built?

[tlnagy]

These images all use LCHab color - has the Colors package been added to the environment in which the docs are built?

No. I think that slipped past me.

[tlnagy]

src/pango.jl is included within link_fontconfig() and the lib strings defined therein are hence not constant when ccall needs them to be.

What's the solution to this given that Cairo is loaded conditionally?

[bjarthur]

i think the clean approach is to move all ccalls using libpango and libpangocairo in Compose.jl to Cairo.jl with thin wrappers which Compose.jl would then call. if @lobingera concurs, i will start working in this direction.

[tlnagy]

I think that's the best approach. Maybe worth posting the idea over there in case @lobingera checks that?

[lobingera]

JuliaGraphics/Cairo.jl#262

[tlnagy]

Any progress on this? I think we should tag a release for Compose today or tomorrow.

[bjarthur]

i've been slowly working on it. i'm okay with tagging. but i'll have some time this weekend if you want to wait. see JuliaInterop/Clang.jl#206

[CiaranOMara]

In Compose.jl, fontconfig is included by Fontconfig.jl, which is pulled in by MikeInnes/Requires.jl. However, in Cairo.jl, fontconfig is included as part of its build.jl.

The build.jl in Fontconfig.jl does not provide pango. But, the build.jl in Cairo.jl does provide pango.

I'm having difficulty understanding how pango provided to Cairo.jl would be available to Compose.jl in the scope of the link_fontconfig() callback. Would pango not also need to be provided to Fontconfig.jl through its build.jl?

[bjarthur]

i'm working on completely overhauling the Compose interface to pango/fontconfig/cairo... it's all broken now which is why i was reluctant to tag the latest version a couple weeks ago. am stuck on BinaryBuilder; see my four issues there. hopefully all will be resolved soon.