initial commits

image.go

@@ -0,0 +1,61 @@
+package imgrow
+
+import (
+	"image"
+	"image/color"
+)
+
+// Image returns an image that is 'img' scalad by 'scalar'.
+//
+// So, for example:
+//
+//	var newImage image.Image = imgrow.Image(2, oldImage)
+//
+// ... would return a new image that is just like 'oldImage' except that it is 2 times as big.
+func Image(scalar int, img image.Image) image.Image {
+	return internalImage {
+		img:img,
+		scalar:scalar,
+	}
+}
+
+var _ image.Image = &internalImage{}
+
+type internalImage struct {
+	img image.Image
+	scalar int
+}
+
+func (receiver internalImage) At(x, y int) color.Color {
+	var img image.Image = receiver.img
+
+	if nil == img {
+		return nil
+	}
+
+	var scalar int = receiver.scalar
+
+	x2, y2 := inverseScaleXY(scalar, x, y)
+
+	return img.At(x2, y2)
+}
+
+func (receiver internalImage) Bounds() image.Rectangle {
+	var img image.Image = receiver.img
+
+	if nil == img {
+		return image.Rectangle{}
+	}
+
+	return scaleRectangle(receiver.scalar, img.Bounds())
+}
+
+func (receiver internalImage) ColorModel() color.Model {
+	var img image.Image = receiver.img
+
+	if nil == img {
+		return nil
+	}
+
+	return img.ColorModel()
+}