holly molly

letter/image.go

@@ -0,0 +1,87 @@
+package letter
+
+import (
+	"clock/imageutils"
+	"image"
+	"image/color"
+	"image/draw"
+)
+
+type Letter string
+
+var Nums = []Letter{
+	"111101111",
+	"010010010",
+	"110010011",
+	"111011111",
+	"101111001",
+	"011010110",
+	"001111111",
+	"111001001",
+	"011111111",
+	"111111001",
+}
+
+var Empty = Letter("000000000").Render()
+
+func (l Letter) ColorModel() color.Model {
+	return color.RGBAModel
+}
+
+func (l Letter) Bounds() image.Rectangle {
+	return image.Rect(0, 0, 3, 3)
+}
+
+func (l Letter) At(x, y int) color.Color {
+	target := l[x+y*3]
+	if target != '1' {
+		return color.Alpha{}
+	}
+	return color.Black
+}
+
+func (l Letter) Render() image.Image {
+	img := image.NewRGBA(l.Bounds())
+	draw.Draw(img, l.Bounds(), image.White, image.ZP, draw.Src)
+	draw.Draw(img, l.Bounds(), l, image.ZP, draw.Over)
+	return img
+}
+
+type blank struct {
+	image.Image
+	color.Color
+	imageutils.Side
+}
+
+func (b blank) ColorModel() color.Model { return b.Image.ColorModel() }
+
+func (b blank) Bounds() image.Rectangle {
+	rect := image.Rectangle{}
+	switch b.Side {
+	case imageutils.Left:
+		fallthrough
+	case imageutils.Right:
+		rect = image.Rectangle{
+			image.ZP,
+			image.Point{
+				1, b.Image.Bounds().Dy(),
+			},
+		}
+	case imageutils.Up:
+		fallthrough
+	case imageutils.Down:
+		rect = image.Rectangle{
+			image.ZP,
+			image.Point{
+				b.Image.Bounds().Dx(), 1,
+			},
+		}
+	}
+	return rect
+}
+
+func (b blank) At(x, y int) color.Color { return b.Color }
+
+func Blank(img image.Image, clr color.Color, side imageutils.Side) image.Image {
+	return imageutils.Concat(img, blank{img, clr, side}, side)
+}