Initial commit

main.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"crypto/sha1"
+	"fmt"
+	"strconv"
+
+	"github.com/fogleman/gg"
+)
+
+// 8x8 square of 100x100 px squares
+func main() {
+	dc := gg.NewContext(800, 800)
+
+	hash := hash("InsightForgeOrg")
+
+	colorString := hash[0:6]
+	r, g, b := rgbFromHex(colorString)
+	dc.SetRGB255(r, g, b)
+
+	for i, character := range hash[6:14] {
+		tmp, _ := strconv.ParseUint(string(character), 16, 8)
+		n := int(tmp)
+		for _, v := range []uint{0, 1, 2, 3} {
+			on := hasBit(n, v)
+
+			dc.DrawRectangle(float64(v * 100), float64(i * 100), 100, 100)
+			dc.DrawRectangle(700 - float64(v * 100), float64(i * 100), 100, 100)
+			if !on {
+				dc.SetRGB255(r, g, b)
+			} else {
+				dc.SetRGB255(255, 255, 255)
+			}
+			dc.Fill()
+		}
+	}
+
+	dc.SavePNG("out.png")
+}
+
+func rgbFromHex(hex string) (int, int, int) {
+	r, _ := strconv.ParseUint(hex[0:2], 16, 8)
+	g, _ := strconv.ParseUint(hex[2:4], 16, 8)
+	b, _ := strconv.ParseUint(hex[4:6], 16, 8)
+	return int(r), int(g), int(b)
+}
+
+func hash(str string) string {
+	h := sha1.New()
+	h.Write([]byte(str))
+	res := h.Sum(nil)
+	return fmt.Sprintf("%x", res)
+}
+
+func hasBit(n int, pos uint) bool {
+    val := n & (1 << pos)
+    return (val > 0)
+}
+
+// 9d26bf3cf1fb2b2f02d4a2013333f4fcd551cb2e
+// 9d26bf -> color
+//       3 -> row1
+//        c -> row2
+//          ...
+//              b -> row8
+
+// 3 = 0 0 1 1
+//