font/plan9font: fix byteoffset for non-zero origin

Updates golang/go#57258 Change-Id: I4c7305c8e61f2d2cc0227c0daf0b003bbc466497 Reviewed-on: https://go-review.googlesource.com/c/image/+/458035 Reviewed-by: Dmitri Shuralyov <[email protected]> Run-TryBot: Nigel Tao <[email protected]> Reviewed-by: Dmitri Shuralyov <[email protected]> TryBot-Result: Gopher Robot <[email protected]> Reviewed-by: Nigel Tao (INACTIVE; USE @golang.org INSTEAD) <[email protected]>
golang · Dec 16, 2022 · c5235ae · c5235ae
1 parent 0888fdd
commit c5235ae
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/font/plan9font/plan9font.go b/font/plan9font/plan9font.go
@@ -370,6 +370,8 @@ type plan9Image struct {
 }
 
 func (m *plan9Image) byteoffset(x, y int) int {
+	x -= m.rect.Min.X
+	y -= m.rect.Min.Y
 	a := y * m.width
 	if m.depth < 8 {
 		// We need to always round down, but Go rounds toward zero.