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authorStani <spe.stani.be@gmail.com>2015-07-06 18:42:05 +0200
committerStani <spe.stani.be@gmail.com>2015-07-06 18:42:05 +0200
commit7e234f14ed2b8914289798110924585a059b274f (patch)
tree7478960bc4dfcb63739d81c1eeb1f1d74b7129cc
parent3442cac58db1e6688e15541da68b0dcfea98b977 (diff)
implement full support for fill styles
-rw-r--r--fpdf.go32
1 files changed, 27 insertions, 5 deletions
diff --git a/fpdf.go b/fpdf.go
index ea4b384..55bb848 100644
--- a/fpdf.go
+++ b/fpdf.go
@@ -858,14 +858,26 @@ func (f *Fpdf) Line(x1, y1, x2, y2 float64) {
f.outf("%.2f %.2f m %.2f %.2f l S", x1*f.k, (f.h-y1)*f.k, x2*f.k, (f.h-y2)*f.k)
}
+// fillDrawOp corrects path painting operators
func fillDrawOp(styleStr string) (opStr string) {
switch strings.ToUpper(styleStr) {
+ case "", "D":
+ // Stroke the path.
+ opStr = "S"
case "F":
+ // fill the path, using the nonzero winding number rule
opStr = "f"
+ case "F*":
+ // fill the path, using the even-odd rule
+ opStr = "f*"
case "FD", "DF":
+ // fill and then stroke the path, using the nonzero winding number rule
opStr = "B"
+ case "FD*", "DF*":
+ // fill and then stroke the path, using the even-odd rule
+ opStr = "B*"
default:
- opStr = "S"
+ opStr = styleStr
}
return
}
@@ -931,7 +943,7 @@ func (f *Fpdf) Polygon(points []PointType, styleStr string) {
}
}
f.outf("%.5f %.5f l ", points[0].X*f.k, (f.h-points[0].Y)*f.k)
- f.outf(fillDrawOp(styleStr))
+ f.DrawPath(styleStr)
}
}
@@ -966,7 +978,7 @@ func (f *Fpdf) Beziergon(points []PointType, styleStr string) {
points = points[3:]
}
- f.outf(fillDrawOp(styleStr))
+ f.DrawPath(styleStr)
}
// Outputs current point
@@ -3507,8 +3519,18 @@ func (f *Fpdf) ClosePath() {
// DrawPath actually draws the path on the page.
//
// styleStr can be "F" for filled, "D" for outlined only, or "DF" or "FD" for
-// outlined and filled. An empty string will be replaced with "D". Drawing uses
-// the current draw color, line width, and cap style centered on the
+// outlined and filled. An empty string will be replaced with "D".
+// Path-painting operators as defined in the PDF specification are also
+// allowed: "S" (Stroke the path), "s" (Close and stroke the path),
+// "f" (fill the path, using the nonzero winding number), "f*"
+// (Fill the path, using the even-odd rule), "B" (Fill and then stroke
+// the path, using the nonzero winding number rule), "B*" (Fill and
+// then stroke the path, using the even-odd rule), "b" (Close, fill,
+// and then stroke the path, using the nonzero winding number rule) and
+// "b*" (Close, fill, and then stroke the path, using the even-odd
+// rule).
+// Drawing uses the current draw color, line width, and cap style
+// centered on the
// path. Filling uses the current fill color.
//
// See tutorial 30 for an example of this function.