sanity check tests.

drawing/color.go

@@ -104,6 +104,16 @@ func (c Color) Equals(other Color) bool {
 		c.A == other.A
 }
 
+// AverageWith averages two colors.
+func (c Color) AverageWith(other Color) Color {
+	return Color{
+		R: (c.R + other.R) >> 1,
+		G: (c.G + other.G) >> 1,
+		B: (c.B + other.B) >> 1,
+		A: c.A,
+	}
+}
+
 // String returns a css string representation of the color.
 func (c Color) String() string {
 	fa := float64(c.A) / float64(255)

drawing/image.go

@@ -1,23 +0,0 @@
-package drawing
-
-import "image"
-
-// Image is a helper wraper that allows (sane) access to pixel info.
-type Image struct {
-	Inner *image.RGBA
-}
-
-// Width returns the image's width in pixels.
-func (i Image) Width() int {
-	return i.Inner.Rect.Size().X
-}
-
-// Height returns the image's height in pixels.
-func (i Image) Height() int {
-	return i.Inner.Rect.Size().Y
-}
-
-// At returns a pixel color at a given x/y.
-func (i Image) At(x, y int) Color {
-	return ColorFromAlphaMixedRGBA(i.Inner.At(x, y).RGBA())
-}