Adding upstream version 2.1.2.

Signed-off-by: Daniel Baumann <daniel@debian.org>

examples/text_rotation/main.go

@@ -0,0 +1,51 @@
+package main
+
+//go:generate go run main.go
+
+import (
+	"os"
+
+	"github.com/wcharczuk/go-chart/v2"
+	"github.com/wcharczuk/go-chart/v2/drawing"
+)
+
+func main() {
+	f, _ := chart.GetDefaultFont()
+	r, _ := chart.PNG(1024, 1024)
+
+	chart.Draw.Text(r, "Test", 64, 64, chart.Style{
+		FontColor: drawing.ColorBlack,
+		FontSize:  18,
+		Font:      f,
+	})
+
+	chart.Draw.Text(r, "Test", 64, 64, chart.Style{
+		FontColor:           drawing.ColorBlack,
+		FontSize:            18,
+		Font:                f,
+		TextRotationDegrees: 45.0,
+	})
+
+	tb := chart.Draw.MeasureText(r, "Test", chart.Style{
+		FontColor: drawing.ColorBlack,
+		FontSize:  18,
+		Font:      f,
+	}).Shift(64, 64)
+
+	tbc := tb.Corners().Rotate(45)
+
+	chart.Draw.BoxCorners(r, tbc, chart.Style{
+		StrokeColor: drawing.ColorRed,
+		StrokeWidth: 2,
+	})
+
+	tbcb := tbc.Box()
+	chart.Draw.Box(r, tbcb, chart.Style{
+		StrokeColor: drawing.ColorBlue,
+		StrokeWidth: 2,
+	})
+
+	file, _ := os.Create("output.png")
+	defer file.Close()
+	r.Save(file)
+}