initial

go.mod

@@ -0,0 +1,3 @@
+module imageutils
+
+go 1.21.4

resize.go

@@ -0,0 +1,46 @@
+package imageutils
+
+import (
+	"image"
+	"image/color"
+)
+
+type resized struct {
+	src   image.Image
+	scale int
+}
+
+// ColorModel implements image.Image interface
+func (r resized) ColorModel() color.Model {
+	return r.src.ColorModel()
+}
+
+// Bounds implements image.Image interface
+func (r resized) Bounds() image.Rectangle {
+	b := r.src.Bounds()
+	return image.Rectangle{
+		Min: image.Point{
+			X: b.Min.X,
+			Y: b.Min.Y,
+		},
+		Max: image.Point{
+			X: b.Max.X * r.scale,
+			Y: b.Max.Y * r.scale,
+		},
+	}
+}
+
+// At implements image.Image interface
+func (r resized) At(x, y int) color.Color {
+	return r.src.At(x/r.scale, y/r.scale)
+}
+
+// Resize resizes image to a given scale
+// and then returns image.
+// For now it will work only with positive integers.
+func Resize(img image.Image, scale int) image.Image {
+	if scale < 1 {
+		scale = 1
+	}
+	return resized{img, scale}	
+}