Bump Cairo compatibility

[CiaranOMara]

This pull request sets Cairo compatibility to 0.7 and addresses associated deprecated bindings.

This request closes #357.

[codecov-io]

Codecov Report

Merging #360 into master will increase coverage by 0.94%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master     #360      +/-   ##
==========================================
+ Coverage   39.84%   40.79%   +0.94%     
==========================================
  Files          18       18              
  Lines        3059     3057       -2     
==========================================
+ Hits         1219     1247      +28     
+ Misses       1840     1810      -30

Impacted Files	Coverage Δ
src/pango.jl	21.66% <ø> (ø)	⬆️
src/cairo_backends.jl	61.11% <80%> (+5.58%)	⬆️
src/svg.jl	71.12% <0%> (+1.08%)	⬆️
src/property.jl	24.53% <0%> (+2.93%)	⬆️

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[Mattriks]

Have you tested this with a julia unicode example? e.g.

# the string is \ita \itb etc
img = compose(context(), 
    text(0.5, 0.5, "𝑎 𝑏 𝑐 𝑑 𝑒 𝑓", hcenter, vcenter), font("Segoe UI"), fontsize(20pt) )
draw(PNG(), img)

This works for me on Cairo 0.6, but only shows boxes with Cairo 0.7 (on windows 10 OS).

[CiaranOMara]

That type of example does not appear to be included in a current integration test.

Below is the output of what I got for the above example with Cairo v0.7 on macOS 10.14.6. I can't get Cairo v0.6 to work.

julia> using Compose
julia> import Cairo, Fontconfig
julia> img = compose(context(), text(0.5, 0.5, "𝑎 𝑏 𝑐 𝑑 𝑒 𝑓", hcenter, vcenter), font("Segoe UI"), fontsize(20pt) )
Context(Measures.BoundingBox{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}},Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}}((0.0w, 0.0h), (1.0w, 1.0h)), nothing, nothing, nothing, nothing, List([]), List([Compose.Form{Compose.TextPrimitive{Tuple{Measures.Length{:cx,Float64},Measures.Length{:cy,Float64}},Rotation{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}},Tuple{Measures.Length{:mm,Float64},Measures.Length{:mm,Float64}}}}(Compose.TextPrimitive{Tuple{Measures.Length{:cx,Float64},Measures.Length{:cy,Float64}},Rotation{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}},Tuple{Measures.Length{:mm,Float64},Measures.Length{:mm,Float64}}}[Compose.TextPrimitive{Tuple{Measures.Length{:cx,Float64},Measures.Length{:cy,Float64}},Rotation{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}},Tuple{Measures.Length{:mm,Float64},Measures.Length{:mm,Float64}}}((0.5cx, 0.5cy), "𝑎 𝑏 𝑐 𝑑 𝑒 𝑓", Compose.HCenter(), Compose.VCenter(), Rotation{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}}(0.0, (0.5w, 0.5h)), (0.0mm, 0.0mm))], Symbol(""))]), List([Compose.Property{Compose.FontSizePrimitive}(Compose.FontSizePrimitive[Compose.FontSizePrimitive(7.055555555555555mm)]), Compose.Property{Compose.FontPrimitive}(Compose.FontPrimitive[Compose.FontPrimitive("Segoe UI")])]), 0, false, false, false, false, nothing, nothing, 0.0, Symbol(""))

julia> draw(PNG(), img)
Compose.Image{Compose.PNGBackend}(IOBuffer(data=UInt8[...], readable=true, writable=true, seekable=true, append=false, size=2758, maxsize=Inf, ptr=2759, mark=-1), Cairo.CairoSurfaceBase{UInt32}(Ptr{Nothing} @0x0000000000000000, 535.0, 378.0), Cairo.CairoContext(Ptr{Nothing} @0x0000000000000000, Cairo.CairoSurfaceBase{UInt32}(Ptr{Nothing} @0x0000000000000000, 535.0, 378.0), Ptr{Nothing} @0x00007fd12118b2e0), 534.5059133378628, 377.9527559055118, RGBA{Float64}(0.0,0.0,0.0,0.0), RGBA{Float64}(0.0,0.0,0.0,1.0), Float64[], LineCapButt(), Compose.LineJoinMiter(), true, 0.3mm, 3.880555555555555mm, "Helvetica Neue,Helvetica,Arial,sans", nothing, false, Compose.ImagePropertyState[], Compose.ImagePropertyFrame[], Dict{Type,Union{Nothing, Compose.Property}}(), true, false, nothing, true, true, 3.7795275590551185, nothing, nothing)
false

julia> draw(PNG("tmp.png"), img)

However, plain text is fine.

julia> img_plain = compose(context(), text(0.5, 0.5, "plain text", hcenter, vcenter), font("Segoe UI"), fontsize(20pt) )
Context(Measures.BoundingBox{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}},Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}}((0.0w, 0.0h), (1.0w, 1.0h)), nothing, nothing, nothing, nothing, List([]), List([Compose.Form{Compose.TextPrimitive{Tuple{Measures.Length{:cx,Float64},Measures.Length{:cy,Float64}},Rotation{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}},Tuple{Measures.Length{:mm,Float64},Measures.Length{:mm,Float64}}}}(Compose.TextPrimitive{Tuple{Measures.Length{:cx,Float64},Measures.Length{:cy,Float64}},Rotation{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}},Tuple{Measures.Length{:mm,Float64},Measures.Length{:mm,Float64}}}[Compose.TextPrimitive{Tuple{Measures.Length{:cx,Float64},Measures.Length{:cy,Float64}},Rotation{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}},Tuple{Measures.Length{:mm,Float64},Measures.Length{:mm,Float64}}}((0.5cx, 0.5cy), "plain text", Compose.HCenter(), Compose.VCenter(), Rotation{Tuple{Measures.Length{:w,Float64},Measures.Length{:h,Float64}}}(0.0, (0.5w, 0.5h)), (0.0mm, 0.0mm))], Symbol(""))]), List([Compose.Property{Compose.FontSizePrimitive}(Compose.FontSizePrimitive[Compose.FontSizePrimitive(7.055555555555555mm)]), Compose.Property{Compose.FontPrimitive}(Compose.FontPrimitive[Compose.FontPrimitive("Segoe UI")])]), 0, false, false, false, false, nothing, nothing, 0.0, Symbol(""))

julia> draw(PNG(), img_plain)
Compose.Image{Compose.PNGBackend}(IOBuffer(data=UInt8[...], readable=true, writable=true, seekable=true, append=false, size=2485, maxsize=Inf, ptr=2486, mark=-1), Cairo.CairoSurfaceBase{UInt32}(Ptr{Nothing} @0x0000000000000000, 535.0, 378.0), Cairo.CairoContext(Ptr{Nothing} @0x0000000000000000, Cairo.CairoSurfaceBase{UInt32}(Ptr{Nothing} @0x0000000000000000, 535.0, 378.0), Ptr{Nothing} @0x00007fd12118b5a0), 534.5059133378628, 377.9527559055118, RGBA{Float64}(0.0,0.0,0.0,0.0), RGBA{Float64}(0.0,0.0,0.0,1.0), Float64[], LineCapButt(), Compose.LineJoinMiter(), true, 0.3mm, 3.880555555555555mm, "Helvetica Neue,Helvetica,Arial,sans", nothing, false, Compose.ImagePropertyState[], Compose.ImagePropertyFrame[], Dict{Type,Union{Nothing, Compose.Property}}(), true, false, nothing, true, true, 3.7795275590551185, nothing, nothing)
false

julia> draw(PNG("plain.png"), img_plain)

[CiaranOMara]

Your example works on Linux 5.3.5-arch1-1-ARCH x86_64.

[CiaranOMara]

@Mattriks, your unicode example works for me on macOS 10.15 with 076581d and JuliaGraphics/Fontconfig.jl#25, does this combination work for you on Windows 10?

[CiaranOMara]

Waiting for Fontconfig v0.3 to be registered.

[CiaranOMara]

Tests failed for Julia v0.7. Fontconfig v0.3 has a compatibility requirement of Julia ≥ v1. Dropping support for Julia v0.7 will allow a quick transition to a Binary Provider solution... how do you want to approach this?

[tlnagy]

I think we're probably going to go ahead and drop 0.7 support given the difficulties we're running into with testing on it. We'll make a decision soon.

ref: GiovineItalia/Gadfly.jl#1328

[bjarthur]

0.7 has been dropped. #362 . redo CI and let's see if test pass now.