Draw to an image.RGBA

1 files changed, 44 insertions, 0 deletions

diff --git a/drw/drw.go b/drw/drw.go
new file mode 100644
index 0000000..a0844c8
--- /dev/null
+++ b/drw/drw.go
@@ -0,0 +1,44 @@
+package drw // import "hhvn.uk/hbspbar/drw"
+
+import (
+	"image"
+
+	"hhvn.uk/hbspbar/config"
+
+	"github.com/jezek/xgbutil/xgraphics"
+	"github.com/BurntSushi/freetype-go/freetype"
+)
+
+func DrawText(i *image.RGBA, x int, col uint32, text string) (int, error) {
+	ft.SetClip(i.Bounds())
+	ft.SetDst(i)
+
+	src := image.NewUniform(int2rgb(col))
+	ft.SetSrc(src)
+
+	pt := freetype.Pt(x, config.FontYPad+
+		int(ft.PointToFix32(config.FontSize)>>8))
+	npt, err := ft.DrawString(text, pt)
+
+	return int(npt.X / 256) - x, err
+}
+
+func TextWidth(text string) (int) {
+	w, _ := xgraphics.Extents(font, config.FontSize, text)
+	return w
+}
+
+func DrawRect(i *image.RGBA, x, y, w, h int, c uint32, fill bool) {
+	col := int2rgb(c)
+
+	var ix, iy int
+
+	for ix = x; ix < x + w; ix++ {
+		for iy = y; iy < y + h; iy++ {
+			if fill || ix == x || ix == x + w - 1 ||
+					iy == y || iy == y + h - 1 {
+				i.Set(ix, iy, col)
+			}
+		}
+	}
+}