write to file, fix #42

src/renderable.jl

@@ -13,19 +13,17 @@ isrenderable(t::Type) = hasmethod(add_renderable!, Tuple{RenderModel, t})
 
 isrenderable(t::Type{Roadway}) = true
 
+function Base.write(filename::String, c::CairoSurface)
+    write_to_png(c, filename)
+end
 
-"""
-    write_to_svg(surface::CairoSurface, filename::AbstractString)
-
-Write a cairo svg surface to a file. The surface object is destroyed after.
-"""
-function write_to_svg(surface::CairoSurface, filename::AbstractString)
+function Base.write(filename::String, surface::Cairo.CairoSurfaceIOStream)
     finish(surface)
     seek(surface.stream, 0)
     open(filename, "w") do io
         write(io, read(surface.stream, String))
     end
-    return 
+    return
 end
 
 

test/runtests.jl

@@ -21,11 +21,22 @@ end
     c = render([rw, car, car2], camera=SceneFollowCamera(zoom=10.))
 end
 
-@testset "write SVG" begin 
+@testset "write SVG, PDF, PNG" begin 
     roadway = gen_stadium_roadway(4)
     c = @test_deprecated render(roadway)
-    write_to_svg(c, "out.svg")
+    write("out.svg", c)
     @test isfile("out.svg")
+
+    # write pdf 
+    camera = StaticCamera(position=(50,30), zoom=6.)
+    c = render([roadway], camera=camera, 
+           surface=AutoViz.CairoPDFSurface(IOBuffer(), AutoViz.canvas_width(camera), AutoViz.canvas_height(camera)))
+    write("out.pdf", c)
+
+    # write png 
+    c = render([roadway], camera=camera, 
+           surface=AutoViz.CairoRGBSurface(AutoViz.canvas_width(camera), AutoViz.canvas_height(camera)))
+    write("out.png", c)
 end
 
 @testset "vehicle rendering" begin