refactor

pkg/clock/clock.go

@@ -0,0 +1,82 @@
+//go:build draft
+package clock
+
+import (
+	"image"
+	"image/color"
+	"image/png"
+	"io"
+	"strconv"
+	"time"
+
+	"git.niplace.ru/XoxJlopeZi4BB/clock/letter"
+	"git.niplace.ru/XoxJlopeZi4BB/imageutils"
+)
+
+
+
+var img1, img2 = letter.Render(letter.Nums[6]), letter.Render(letter.Nums[9])
+
+func DownRightBlank(img image.Image) image.Image {
+	clr := color.White
+	img = letter.Blank(img, clr, imageutils.Down)
+	return letter.Blank(img, clr, imageutils.Right)
+}
+
+func LeftUpBlank(img image.Image) image.Image {
+	clr := color.White
+	img = letter.Blank(img, clr, imageutils.Left)
+	return letter.Blank(img, clr, imageutils.Up)
+}
+
+func RenderNum(n int) image.Image {
+	var img image.Image = image.NewRGBA(image.Rect(0, 0, 0, 0))
+	s := strconv.Itoa(n)
+	for i := range s {
+		n, err := strconv.Atoi(string(s[i]))
+		if err != nil {
+			panic(err)
+		}
+
+		num := letter.Render(letter.Nums[n])
+		num = DownRightBlank(num)
+		img = imageutils.Concat(img, num, imageutils.Right)
+	}
+	img = LeftUpBlank(img)
+	return img
+}
+
+func RenderTime(t time.Time) image.Image {
+	hour := RenderNum(t.Hour())
+	if t.Hour() < 10 {
+		hour = imageutils.Concat(
+			DownRightBlank(letter.Empty), hour, imageutils.Right)
+	}
+	minute := RenderNum(t.Minute())
+	if t.Minute() < 10 {
+		minute = imageutils.Concat(
+			DownRightBlank(letter.Empty), minute, imageutils.Right)
+	}
+
+	img := imageutils.Concat(hour, minute, imageutils.Down)
+	return img
+}
+
+func Margin(img image.Image, length int) image.Image {
+	for i := 0; i < length; i++ {
+		img = LeftUpBlank(DownRightBlank(img))
+	}
+	return img
+}
+
+func Time(w io.Writer) {
+	t := time.Now()
+	img := RenderTime(t)
+	img = Margin(img, 3)
+	img = imageutils.Scale(img, 1<<6)
+
+	err := png.Encode(w, img)
+	if err != nil {
+		panic(err)
+	}
+}