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https://github.com/nim-lang/Nim.git
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47 lines
1.0 KiB
Nim
47 lines
1.0 KiB
Nim
import
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Cairo
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converter FloatConversion64(x: int): float64 = return toFloat(x)
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converter FloatConversion32(x: int): float32 = return toFloat(x)
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converter FloatConversionPlain(x: int): float = return toFloat(x)
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const width = 500
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const height = 500
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const outFile = "CairoTest.png"
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var surface = Cairo.ImageSurfaceCreate(CAIRO.FORMAT_RGB24, width, height)
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var ç = Cairo.Create(surface)
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ç.SetSourceRGB(1, 1, 1)
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ç.Paint()
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ç.SetLineWidth(10)
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ç.SetLineCap(CAIRO.LINE_CAP_ROUND)
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const count = 12
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var winc = width / count
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var hinc = width / count
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for i in 1 .. count-1:
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var amount = i / count
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ç.SetSourceRGB(0, 1 - amount, amount)
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ç.MoveTo(i * winc, hinc)
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ç.LineTo(width - i * winc, height - hinc)
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ç.Stroke()
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ç.SetSourceRGB(1 - amount, 0, amount)
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ç.MoveTo(winc, i * hinc)
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ç.LineTo(width - winc, height - i * hinc)
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ç.Stroke()
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echo(surface.WriteToPNG(outFile))
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surface.Destroy()
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type TFoo = object
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converter toPtr*(some: var TFoo): ptr TFoo = (addr some)
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proc zoot(x: ptr TFoo) = nil
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var x: Tfoo
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zoot(x)
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