Merge pull request #1 from dim13/go

Go

README.md

@@ -1,6 +1,7 @@
 # hashcolor
+
 Simple color randomizer for uxterm
 
-Build and install with `pmake' on linux
+## install
 
-Patch uxterm with `pmake patch'
+	go get -u github.com/dim13/hashcolor/cmd/hashcolor

cmd/hashcolor/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+	"image/color"
+	"os"
+	"strings"
+
+	"github.com/dim13/hashcolor"
+)
+
+func hex(c color.Color) string {
+	rgba := color.RGBAModel.Convert(c).(color.RGBA)
+	return fmt.Sprintf("#%.2x%.2x%.2x", rgba.R, rgba.G, rgba.B)
+}
+
+func main() {
+	c := hashcolor.New(strings.Join(os.Args[1:], " "))
+	t, s := hashcolor.Tint(c), hashcolor.Shade(c)
+	fmt.Println("-fg", hex(t), "-bg", hex(s))
+}

go.mod

@@ -0,0 +1,5 @@
+module github.com/dim13/hashcolor
+
+go 1.12
+
+require github.com/dim13/crc24 v0.0.0-20190308110643-af7201913116

go.sum

@@ -0,0 +1,2 @@
+github.com/dim13/crc24 v0.0.0-20190308110643-af7201913116 h1:Yg0Qk0ozxBmyHXaFiyAokM5Gf/uCFm7Vy+ukpFPiFVQ=
+github.com/dim13/crc24 v0.0.0-20190308110643-af7201913116/go.mod h1:TejqRSRwQ36N6MSUaGN8WipY4g3bgf5HeEi9fApCxG0=

hashcolor.go

@@ -0,0 +1,36 @@
+package hashcolor
+
+import (
+	"image/color"
+
+	"github.com/dim13/crc24"
+)
+
+// New color from hashed string
+func New(s string) color.RGBA {
+	c := crc24.Sum([]byte(s))
+	return color.RGBA{
+		R: uint8(c >> 0x10),
+		G: uint8(c >> 0x08),
+		B: uint8(c),
+		A: 0xff,
+	}
+}
+
+// Tint color
+func Tint(c color.Color) color.RGBA {
+	rgba := color.RGBAModel.Convert(c).(color.RGBA)
+	rgba.R += (0xff - rgba.R) >> 1
+	rgba.G += (0xff - rgba.G) >> 1
+	rgba.B += (0xff - rgba.B) >> 1
+	return rgba
+}
+
+// Shade color
+func Shade(c color.Color) color.RGBA {
+	rgba := color.RGBAModel.Convert(c).(color.RGBA)
+	rgba.R >>= 2
+	rgba.G >>= 2
+	rgba.B >>= 2
+	return rgba
+}