Fixed Area drawing assuming the first pixel of the *image.NRGBA is at i.Pix[0].

1 files changed, 9 insertions, 0 deletions

diff --git a/area.go b/area.go
index 5dfce26..3fd7cfb 100644
--- a/area.go
+++ b/area.go
@@ -315,3 +315,12 @@ func (a *Area) setRect(x int, y int, width int, height int, rr *[]resizerequest)
 func (a *Area) preferredSize() (width int, height int) {
 	return a.sysData.preferredSize()
 }
+
+// internal function, but shared by all system implementations: &img.Pix[0] is not necessarily the first pixel in the image
+func pixelDataPos(img *image.NRGBA) int {
+	return img.PixOffset(img.Rect.Min.X, img.Rect.Min.Y)
+}
+
+func pixelData(img *image.NRGBA) *uint8 {
+	return &img.Pix[pixelDataPos(img)]
+}