45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
// Copyright 2015 The draw2d Authors. All rights reserved.
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// created: 26/06/2015 by Stani Michiels
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package draw2dpdf
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import (
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"math"
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"github.com/llgcode/draw2d"
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)
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const deg = 180 / math.Pi
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// ConvertPath converts a paths to the pdf api
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func ConvertPath(path *draw2d.Path, pdf Vectorizer) {
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var startX, startY float64 = 0, 0
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i := 0
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for _, cmp := range path.Components {
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switch cmp {
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case draw2d.MoveToCmp:
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startX, startY = path.Points[i], path.Points[i+1]
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pdf.MoveTo(startX, startY)
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i += 2
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case draw2d.LineToCmp:
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pdf.LineTo(path.Points[i], path.Points[i+1])
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i += 2
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case draw2d.QuadCurveToCmp:
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pdf.CurveTo(path.Points[i], path.Points[i+1], path.Points[i+2], path.Points[i+3])
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i += 4
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case draw2d.CubicCurveToCmp:
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pdf.CurveBezierCubicTo(path.Points[i], path.Points[i+1], path.Points[i+2], path.Points[i+3], path.Points[i+4], path.Points[i+5])
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i += 6
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case draw2d.ArcToCmp:
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pdf.ArcTo(path.Points[i], path.Points[i+1], path.Points[i+2], path.Points[i+3],
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0, // degRotate
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path.Points[i+4]*deg, // degStart = startAngle
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(path.Points[i+4]-path.Points[i+5])*deg) // degEnd = startAngle-angle
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i += 6
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case draw2d.CloseCmp:
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pdf.LineTo(startX, startY)
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pdf.ClosePath()
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}
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}
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}
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