Adding upstream version 2.1.2.

Signed-off-by: Daniel Baumann <daniel@debian.org>

drawing/transformer.go

@@ -0,0 +1,39 @@
+// Copyright 2010 The draw2d Authors. All rights reserved.
+// created: 13/12/2010 by Laurent Le Goff
+
+package drawing
+
+// Transformer apply the Matrix transformation tr
+type Transformer struct {
+	Tr        Matrix
+	Flattener Flattener
+}
+
+// MoveTo implements the path builder interface.
+func (t Transformer) MoveTo(x, y float64) {
+	u := x*t.Tr[0] + y*t.Tr[2] + t.Tr[4]
+	v := x*t.Tr[1] + y*t.Tr[3] + t.Tr[5]
+	t.Flattener.MoveTo(u, v)
+}
+
+// LineTo implements the path builder interface.
+func (t Transformer) LineTo(x, y float64) {
+	u := x*t.Tr[0] + y*t.Tr[2] + t.Tr[4]
+	v := x*t.Tr[1] + y*t.Tr[3] + t.Tr[5]
+	t.Flattener.LineTo(u, v)
+}
+
+// LineJoin implements the path builder interface.
+func (t Transformer) LineJoin() {
+	t.Flattener.LineJoin()
+}
+
+// Close implements the path builder interface.
+func (t Transformer) Close() {
+	t.Flattener.Close()
+}
+
+// End implements the path builder interface.
+func (t Transformer) End() {
+	t.Flattener.End()
+}