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Bindings to the Cairo graphics library.

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I think `Ref` is the recommended way to use output arguments: https://docs.julialang.org/en/v1/base/c/#Base.pointer ~~Might be a fix for #363~~ Never mind, I was able to check this locally and it doesn't...

When running my tests on CI (both `Julia 1.9 - windows-latest - x64` and `Julia 1 - windows-latest - x64`) I'm seeing a `ReadOnlyMemoryError()`: ```plain Got exception outside of a...

Would it be possible to add a wrapper for `cairo_pdf_surface_set_metadata()` (https://www.cairographics.org/manual/cairo-PDF-Surfaces.html#cairo-pdf-surface-set-metadata)? I think this would be useful to enable https://github.com/MakieOrg/Makie.jl/issues/3167. I would be willing to have a go at this,...

In trying to save a plot in Gadfly the axis labels end up being messed up. The following code produces a figure with messed up labels (which is below). ```...

Ref. #355 modified: samples/Samples.md Include sample_record_inkextents new file: samples/sample_record_inkextents.jl new file: samples/sample_record_inkextents.png modified: src/Cairo.jl Add ink_extents

Cairo.jl currently fails PkgEval because Pango doesn't like a system without fonts (such as the bare rootfs used by PkgEval): ``` Test Summary: |Time IOBuffer Rooting | None 0.5s Test...

These are small features that I am porting from CairoMakie so that they will be available to Luxor as well, to allow support for MathTeXEngine v0.5. I do not know...

Since a few day smaller fonts (below 16pt) are not rendered correctly any more. Most easyly to see with the sample_pango_text.jl example: ![sample_pango_text](https://user-images.githubusercontent.com/87604697/144637779-ffaf0719-d409-4747-a06e-be435bc80f32.png) This is with Julia 1.6.4 and Cairo...