More plugins: contrast, brightness, invert, colors

+ move plugins to plugins.available by default

buildAndRun.sh

@@ -6,7 +6,7 @@ set -x
 
 pluginSrc='pluginSrc'
 pluginDirs=`ls $pluginSrc`
-mkdir -p plugins
+mkdir -p plugins.available plugins
 
 for i in ${pluginDirs}
 do
@@ -14,7 +14,7 @@ do
     (cd $fullPath; docker run --rm -v "$PWD":/usr/src/$fullPath -w /usr/src/$fullPath golang:1.8 go build -buildmode=plugin)
 done
 
-mv -f `find $pluginSrc -name '*.so'` plugins/
+mv -f `find $pluginSrc -name '*.so'` plugins.available/
 
 # Compile main app
 

pluginSrc/blue/plugin.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"image"
+	"image/color"
+)
+
+// Convert to binary image
+func Transform(src image.Image) image.Image {
+	bounds := src.Bounds()
+	w, h := bounds.Max.X, bounds.Max.Y
+	ret := image.NewRGBA(image.Rectangle{image.Point{0, 0}, image.Point{w, h}})
+	for x := 0; x < w; x++ {
+		for y := 0; y < h; y++ {
+			_, _, b, _ := src.At(x, y).RGBA()
+			ret.Set(x, y, color.RGBA{0, 0, uint8(b / 255), 0})
+		}
+	}
+	return ret
+}

pluginSrc/brightness/plugin.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"image"
+	"image/color"
+)
+
+func add(v uint32) uint32 {
+	v += 50
+	if v > 255 {
+		v = 255
+	}
+	return v
+}
+
+// Convert to binary image
+func Transform(src image.Image) image.Image {
+	bounds := src.Bounds()
+	w, h := bounds.Max.X, bounds.Max.Y
+	ret := image.NewRGBA(image.Rectangle{image.Point{0, 0}, image.Point{w, h}})
+	for x := 0; x < w; x++ {
+		for y := 0; y < h; y++ {
+			r, g, b, _ := src.At(x, y).RGBA()
+			r, g, b = r/256, g/256, b/256
+
+			r = add(r)
+			g = add(g)
+			b = add(b)
+
+			ret.Set(x, y, color.RGBA{uint8(r), uint8(g), uint8(b), 0})
+		}
+	}
+	return ret
+}

pluginSrc/contrast/plugin.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"image"
+	"image/color"
+)
+
+func contrast(v uint32) uint32 {
+	vf := float64(v) / 255
+	if vf < 0.5 {
+		vf = vf * vf * 2
+	} else {
+		vf = 1 - vf
+		vf = 1 - vf*vf*2
+	}
+	return uint32(255 * vf)
+
+	// if v < 128 {
+	// 	return v * v * 2
+	// }
+	// v = 128 - v
+	// return 128 - v*v*2
+}
+
+// Convert to binary image
+func Transform(src image.Image) image.Image {
+	bounds := src.Bounds()
+	w, h := bounds.Max.X, bounds.Max.Y
+	ret := image.NewRGBA(image.Rectangle{image.Point{0, 0}, image.Point{w, h}})
+	for x := 0; x < w; x++ {
+		for y := 0; y < h; y++ {
+			r, g, b, _ := src.At(x, y).RGBA()
+			r, g, b = r/256, g/256, b/256
+
+			r = contrast(r)
+			g = contrast(g)
+			b = contrast(b)
+
+			ret.Set(x, y, color.RGBA{uint8(r), uint8(g), uint8(b), 0})
+		}
+	}
+	return ret
+}

pluginSrc/green/plugin.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"image"
+	"image/color"
+)
+
+// Convert to binary image
+func Transform(src image.Image) image.Image {
+	bounds := src.Bounds()
+	w, h := bounds.Max.X, bounds.Max.Y
+	ret := image.NewRGBA(image.Rectangle{image.Point{0, 0}, image.Point{w, h}})
+	for x := 0; x < w; x++ {
+		for y := 0; y < h; y++ {
+			_, g, _, _ := src.At(x, y).RGBA()
+			ret.Set(x, y, color.RGBA{0, uint8(g / 255), 0, 0})
+		}
+	}
+	return ret
+}

pluginSrc/invert/plugin.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"image"
+	"image/color"
+)
+
+// Convert to binary image
+func Transform(src image.Image) image.Image {
+	bounds := src.Bounds()
+	w, h := bounds.Max.X, bounds.Max.Y
+	ret := image.NewRGBA(image.Rectangle{image.Point{0, 0}, image.Point{w, h}})
+	for x := 0; x < w; x++ {
+		for y := 0; y < h; y++ {
+			r, g, b, _ := src.At(x, y).RGBA()
+			r, g, b = 255-r/256, 255-g/256, 255-b/256
+
+			ret.Set(x, y, color.RGBA{uint8(r), uint8(g), uint8(b), 0})
+		}
+	}
+	return ret
+}

pluginSrc/red/plugin.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"image"
+	"image/color"
+)
+
+// Convert to binary image
+func Transform(src image.Image) image.Image {
+	bounds := src.Bounds()
+	w, h := bounds.Max.X, bounds.Max.Y
+	ret := image.NewRGBA(image.Rectangle{image.Point{0, 0}, image.Point{w, h}})
+	for x := 0; x < w; x++ {
+		for y := 0; y < h; y++ {
+			r, _, _, _ := src.At(x, y).RGBA()
+			ret.Set(x, y, color.RGBA{uint8(r / 255), 0, 0, 0})
+		}
+	}
+	return ret
+}