Added fixed precision point utilities

fixedutil/fixedutil.go

@@ -0,0 +1,26 @@
+// Package fixedutil contains functions that make working with fixed precision
+// values easier.
+package fixedutil
+
+import "image"
+import "golang.org/x/image/math/fixed"
+
+// Pt creates a fixed point from a regular point.
+func Pt (point image.Point) fixed.Point26_6 {
+	return fixed.P(point.X, point.Y)
+}
+
+// RoundPt rounds a fixed point into a regular point.
+func RoundPt (point fixed.Point26_6) image.Point {
+	return image.Pt(point.X.Round(), point.Y.Round())
+}
+
+// FloorPt creates a regular point from the floor of a fixed point.
+func FloorPt (point fixed.Point26_6) image.Point {
+	return image.Pt(point.X.Floor(),point.Y.Floor())
+}
+
+// CeilPt creates a regular point from the ceiling of a fixed point.
+func CeilPt (point fixed.Point26_6) image.Point {
+	return image.Pt(point.X.Ceil(),point.Y.Ceil())
+}