add compat save_image for Plots

Author: t-bltg

ext/FreeTypeExt.jl

@@ -487,6 +487,10 @@ function UnicodePlots.get_font_face(font = nothing, fallback = fallback_fonts())
     face
 end
 
-UnicodePlots.save_image(args...; kw...) = FileIO.save(args...; kw...)
+UnicodePlots.save_image(fn::AbstractString, args...; kw...) = FileIO.save(fn, args...; kw...)
+
+# compat for Plots
+UnicodePlots.save_image(io::IO, args...; kw...) =
+    FileIO.save(FileIO.Stream{FileIO.format"PNG"}(io), args...; kw...)
 
 end  # module

test/tst_io.jl

@@ -44,6 +44,16 @@ end
 
         @test_throws ArgumentError savefig(p, tempname() * ".jpg")
     end
+
+    # for Plots
+    if font_found
+        p = lineplot(1:2)
+        tmp = tempname() * ".png"
+        open(tmp, "w") do io
+            UnicodePlots.save_image(io, UnicodePlots.png_image(p))
+        end
+        @test filesize(tmp) > 1_000
+    end
 end
 
 @testset "stringify plot - performance regression" begin