refactor

cmd/dither/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"flag"
+	"image"
+
+	"git.nkpl.cc/twocookedfaggots/imageutils/pkg/dithering"
+	"git.nkpl.cc/twocookedfaggots/imageutils/util"
+)
+
+var factor = flag.Float64("n", 0.75, "dithering effect 'magic' number")
+
+func main() {
+	flag.Parse()
+
+	println(*factor)
+	if err := util.ProcessStdio(func(img image.Image) image.Image {
+		return dithering.Dithering{img, *factor}
+	}); err != nil {
+		panic(err)
+	}
+}

cmd/negate/negate.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"image"
+	"image/color"
+
+	"git.nkpl.cc/twocookedfaggots/imageutils/util"
+)
+
+func NegateRGBA(c color.RGBA) color.RGBA {
+	c.R = 255 - c.R
+	c.G = 255 - c.G
+	c.B = 255 - c.B
+	return c
+}
+
+type Negate struct{ image.Image }
+
+func (n Negate) ColorModel() color.Model { return n.Image.ColorModel() }
+func (n Negate) Bounds() image.Rectangle { return n.Image.Bounds() }
+func (n Negate) At(x, y int) color.Color {
+	c := n.Image.At(x, y)
+	r, g, b, a := c.RGBA()
+	RGBAColor := color.RGBA{
+		R: uint8(r >> 8),
+		G: uint8(g >> 8),
+		B: uint8(b >> 8),
+		A: uint8(a >> 8),
+	}
+	return NegateRGBA(RGBAColor)
+}
+
+func main() {
+	if err := util.ProcessStdio(func(img image.Image) image.Image {
+		return Negate{img}
+	}); err != nil {
+		panic(err)
+	}
+}

cmd/scale/main.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"flag"
+	"image"
+
+	"git.nkpl.cc/twocookedfaggots/imageutils"
+	"git.nkpl.cc/twocookedfaggots/imageutils/util"
+)
+
+var scale = flag.Int("n", 2, "rescale by factor")
+
+func main() {
+	flag.Parse()
+	if err := util.ProcessStdio(func(img image.Image) image.Image {
+		return imageutils.Scale(img, *scale)
+	}); err != nil {
+		panic(err)
+	}
+}