bugfix: inverse all anchors

geometry.go

@@ -552,40 +552,31 @@ type Anchor Vec
 
 var (
 	Center      = Anchor{0.5, 0.5}
-	Top         = Anchor{0.5, 1}
-	TopRight    = Anchor{1,   1}
-	Right       = Anchor{1,   0.5}
-	BottomRight = Anchor{1,   0}
-	Bottom      = Anchor{0.5, 0}
-	BottomLeft  = Anchor{0,   0}
-	Left        = Anchor{0,   0.5}
-	TopLeft     = Anchor{0,   1}
+	Top         = Anchor{0.5, 0}
+	TopRight    = Anchor{0,   0}
+	Right       = Anchor{0,   0.5}
+	BottomRight = Anchor{0,   1}
+	Bottom      = Anchor{0.5, 1}
+	BottomLeft  = Anchor{1,   1}
+	Left        = Anchor{1,   0.5}
+	TopLeft     = Anchor{1,   0}
 )
 
+var anchorStrings map[Anchor]string = map[Anchor]string{
+	Center:      "center",
+	Top:         "top",
+	TopRight:    "top-right",
+	Right:       "right",
+	BottomRight: "bottom-right",
+	Bottom:      "bottom",
+	BottomLeft:  "bottom-left",
+	Left:        "left",
+	TopLeft:     "top-left",
+}
+
 // String returns the string representation of an anchor.
 func (anchor Anchor) String() string {
-	switch anchor {
-	case Center:
-		return "center"
-	case Top:
-		return "top"
-	case TopRight:
-		return "top-right"
-	case Right:
-		return "right"
-	case BottomRight:
-		return "bottom-right"
-	case Bottom:
-		return "bottom"
-	case BottomLeft:
-		return "bottom-left"
-	case Left:
-		return "left"
-	case TopLeft:
-		return "top-left"
-	default:
-		return ""
-	}
+	return anchorStrings[anchor]
 }
 
 // AnchorPos returns the relative position of the given anchor.