Factored basic SVG path rendering, basic HTML rendering, and color routines.

1 files changed, 60 insertions, 0 deletions

diff --git a/svgwrite.go b/svgwrite.go
new file mode 100644
index 0000000..ea445c1
--- /dev/null
+++ b/svgwrite.go
@@ -0,0 +1,60 @@
+/*
+ * 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.
+//
+// See example 20 for a demonstration of this function.
+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
+	val := func(arg int) (float64, float64) {
+		return originX + scale*seg.Arg[arg], originY + scale*seg.Arg[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)
+				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
+			default:
+				f.SetErrorf("Unexpected path command '%c'", seg.Cmd)
+			}
+		}
+	}
+}