added tutorial 31: line cap join style

1 files changed, 38 insertions, 0 deletions

diff --git a/fpdf_test.go b/fpdf_test.go
index 8959ece..31faa6f 100644
--- a/fpdf_test.go
+++ b/fpdf_test.go
@@ -1476,3 +1476,41 @@ func ExampleFpdf_tutorial30() {
 	// Output:
 	// Successfully generated pdf/tutorial30.pdf
 }
+
+func ExampleFpdf_tutorial31() {
+	const offset = 75.0
+	pdf := gofpdf.New("L", "mm", "A4", "")
+	pdf.AddPage()
+	var draw = func(cap, join string, x0, y0, x1, y1 float64) {
+		// transform begin & end needed to isolate caps and joins
+		pdf.SetLineCapStyle(cap)
+		pdf.SetLineJoinStyle(join)
+
+		// Draw thick line
+		pdf.SetDrawColor(0x33, 0x33, 0x33)
+		pdf.SetLineWidth(30.0)
+		pdf.MoveTo(x0, y0)
+		pdf.LineTo((x0+x1)/2+offset, (y0+y1)/2)
+		pdf.LineTo(x1, y1)
+		pdf.DrawPath("D")
+
+		// Draw thin helping line
+		pdf.SetDrawColor(0xFF, 0x33, 0x33)
+		pdf.SetLineWidth(2.56)
+		pdf.MoveTo(x0, y0)
+		pdf.LineTo((x0+x1)/2+offset, (y0+y1)/2)
+		pdf.LineTo(x1, y1)
+		pdf.DrawPath("D")
+
+	}
+	x := 35.0
+	caps := []string{"butt", "square", "round"}
+	joins := []string{"bevel", "miter", "round"}
+	for i := range caps {
+		draw(caps[i], joins[i], x, 50, x, 160)
+		x += offset
+	}
+	pdf.OutputAndClose(docWriter(pdf, 31))
+	// Output:
+	// Successfully generated pdf/tutorial31.pdf
+}