Erweiterung von Kurt Jungs gopdf, das leider nicht weiterentwickelt wird https://github.com/jung-kurt/gofpdf
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/*
* Copyright (c) 2014 Kurt Jung (Gmail: kurt.w.jung)
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package gofpdf
// SVGBasicWrite renders the paths encoded in the basic SVG image specified by
// sb. The scale value is used to convert the coordinates in the path to the
// unit of measure specified in New(). The current position (as set with a call
// to SetXY()) is used as the origin of the image. The current line cap style
// (as set with SetLineCapStyle()), line width (as set with SetLineWidth()),
// and draw color (as set with SetDrawColor()) are used in drawing the image
// paths.
func (f *Fpdf) SVGBasicWrite(sb *SVGBasicType, scale float64) {
originX, originY := f.GetXY()
var x, y, newX, newY float64
var cx0, cy0, cx1, cy1 float64
var path []SVGBasicSegmentType
var seg SVGBasicSegmentType
var startX, startY float64
sval := func(origin float64, arg int) float64 {
return origin + scale*seg.Arg[arg]
}
xval := func(arg int) float64 {
return sval(originX, arg)
}
yval := func(arg int) float64 {
return sval(originY, arg)
}
val := func(arg int) (float64, float64) {
return xval(arg), yval(arg + 1)
}
for j := 0; j < len(sb.Segments) && f.Ok(); j++ {
path = sb.Segments[j]
for k := 0; k < len(path) && f.Ok(); k++ {
seg = path[k]
switch seg.Cmd {
case 'M':
x, y = val(0)
startX, startY = x, y
f.SetXY(x, y)
case 'L':
newX, newY = val(0)
f.Line(x, y, newX, newY)
x, y = newX, newY
case 'C':
cx0, cy0 = val(0)
cx1, cy1 = val(2)
newX, newY = val(4)
f.CurveCubic(x, y, cx0, cy0, newX, newY, cx1, cy1, "D")
x, y = newX, newY
case 'Q':
cx0, cy0 = val(0)
newX, newY = val(2)
f.Curve(x, y, cx0, cy0, newX, newY, "D")
x, y = newX, newY
case 'H':
newX = xval(0)
f.Line(x, y, newX, y)
x = newX
case 'V':
newY = yval(0)
f.Line(x, y, x, newY)
y = newY
case 'Z':
f.Line(x, y, startX, startY)
x, y = startX, startY
default:
f.SetErrorf("Unexpected path command '%c'", seg.Cmd)
}
}
}
}