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