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using Color


    

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HSV(160, 0.8, 0.5)


    

    
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[ HSV(h, 1, 1) for h in 0:20:340 ]


    

    
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[ HSV(0, s, 1) for s in 0:.08:1 ]


    

    
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[ HSV(0, 1, v) for v in 0:.08:1 ]


    

    
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convert(RGB, HSV(160, 0.8, 0.5))


    

    
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string(_)


    

    
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"RGB(0.09999999999999998,0.5,0.3666666666666666)"

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# named colors
color("burlywood")


    

    
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using Cairo
using Base.Graphics


    

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# a convenient utility for setting up Cairo drawings with an initial fill color and coordinate system
# the result is a graphics context you can draw to
function drawing(w,h; fill=nothing, coords=nothing, left=0, right=w, top=0, bottom=h, surface=CairoRGBSurface(w, h))
    gc = creategc(surface)
    if coords != nothing
        left, right, top, bottom = coords
    end
    set_coords(gc, 0, 0, w, h, left, right, top, bottom)
    if fill != nothing
        set_source(gc, fill)
        paint(gc)
    end
    set_source(gc, RGB(0,0,0))
    gc
end


    

    
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drawing (generic function with 1 method)

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d = drawing(275, 250; fill=color("burlywood"), left=0, right=1, top=1, bottom=0)


    

    
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CairoContext(Ptr{Void} @0x0000000004c89a60,CairoSurface(Ptr{Void} @0x0000000003710610,275.0,250.0,#undef),Ptr{Void} @0x0000000008684990)

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circle(d, 0.5, 0.5, 0.1); stroke(d)


    

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d.surface


    

    
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set_source(d, HSV(0, 1, 1))


    

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circle(d, 0.5, 0.2, 0.1); fill(d)


    

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d.surface


    

    
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write_to_png(d.surface, "test.png")


    

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function picture(d)
  set_source(d, RGB(0,0,0))
  circle(d, 0.5, 0.5, 0.1); stroke(d)
  set_source(d, HSV(0, 1, 1))
  circle(d, 0.5, 0.2, 0.1); fill(d)
end


    

    
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picture (generic function with 1 method)

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d = drawing(275, 250; fill=color("burlywood"), left=0, right=1, top=1, bottom=0,
            surface=CairoSVGSurface("test.svg", 275, 250))


    

    
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CairoContext(Ptr{Void} @0x0000000006d99660,CairoSurface(Ptr{Void} @0x0000000004855300,275.0,250.0,#undef),Ptr{Void} @0x0000000008684a40)

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picture(d); finish(d.surface)


    

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