Create x package

1 files changed, 100 insertions, 0 deletions

diff --git a/x/x.go b/x/x.go
new file mode 100644
index 0000000..ff00484
--- /dev/null
+++ b/x/x.go
@@ -0,0 +1,100 @@
+package x // import "hhvn.uk/hbspbar/x"
+
+import (
+	"os"
+	"image"
+
+	"hhvn.uk/hbspbar/config"
+	"hhvn.uk/hbspbar/common"
+
+	"github.com/jezek/xgb"
+	"github.com/jezek/xgb/xproto"
+	"github.com/jezek/xgbutil"
+	"github.com/jezek/xgbutil/xgraphics"
+	"github.com/BurntSushi/freetype-go/freetype/truetype"
+)
+
+var InitErr error
+var X       *xgb.Conn
+var XU      *xgbutil.XUtil
+var Screen  *xproto.ScreenInfo
+
+var font    *truetype.Font
+var tw, th  int
+var tbpad   int
+
+func init() {
+	var err error
+
+	X, err = xgb.NewConn()
+	if err != nil {
+		InitErr = err
+		return
+	}
+
+	XU, err = xgbutil.NewConnXgb(X)
+	if err != nil {
+		InitErr = err
+		return
+	}
+
+	setup := xproto.Setup(X)
+	Screen = setup.DefaultScreen(X)
+
+	read, err := os.Open(config.Font)
+	if err != nil {
+		InitErr = common.Perror("os.Open", err)
+		return
+	}
+
+	font, err = xgraphics.ParseFont(read)
+	if err != nil {
+		InitErr = common.Perror("xgraphics.ParseFont", err)
+		return
+	}
+
+	test := xgraphics.New(XU, image.Rect(0, 0, int(config.FontSize * 10), int(config.FontSize * 10)))
+	tw, th, _ = test.Text(0, 0, int2BGRA(config.Fg), config.FontSize, font, "X")
+	tbpad = (int(config.H) - th) / 2
+}
+
+func int2BGRA(argb uint32) (xgraphics.BGRA) {
+	return xgraphics.BGRA{
+		B: uint8( argb & 0x000000ff),
+		G: uint8((argb & 0x0000ff00) >> 8),
+		R: uint8((argb & 0x00ff0000) >> 16),
+		A: uint8((argb & 0xff000000) >> 24) }
+}
+
+func GraphicReInit(i **xgraphics.Image, r image.Rectangle) {
+	if *i != nil {
+		(*i).Destroy()
+	}
+
+	*i = xgraphics.New(XU, r)
+}
+
+func DrawText(i *xgraphics.Image, x int, col uint32, text string) (int, error) {
+	nx, _, err := i.Text(x, config.FontYPad,
+		int2BGRA(col), config.FontSize, font, text)
+	return nx - x, err
+}
+
+func TextWidth(text string) (int) {
+	return tw * len(text)
+}
+
+func DrawRect(i *xgraphics.Image, x, y, w, h int, c uint32, fill bool) {
+	col := int2BGRA(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)
+			}
+		}
+	}
+}