2 files changed, 7 insertions, 5 deletions
diff --git a/graphics/macgui/macwindowmanager.cpp b/graphics/macgui/macwindowmanager.cpp
index 12cd391f92..19448053a3 100644
--- a/graphics/macgui/macwindowmanager.cpp
+++ b/graphics/macgui/macwindowmanager.cpp
@@ -295,7 +295,7 @@ void macDrawPixel(int x, int y, int color, void *data) {
 			uint yu = (uint)y;
 
 			*((byte *)p->surface->getBasePtr(xu, yu)) =
-				(pat[yu % 8] & (1 << (7 - xu % 8))) ?
+				(pat[(yu - p->fillOriginY) % 8] & (1 << (7 - (xu - p->fillOriginX) % 8))) ?
 					color : p->bgColor;
 		}
 	} else {
@@ -310,7 +310,7 @@ void macDrawPixel(int x, int y, int color, void *data) {
 					uint xu = (uint)x; // for letting compiler optimize it
 					uint yu = (uint)y;
 					*((byte *)p->surface->getBasePtr(xu, yu)) =
-						(pat[yu % 8] & (1 << (7 - xu % 8))) ?
+						(pat[(yu - p->fillOriginY) % 8] & (1 << (7 - (xu - p->fillOriginX) % 8))) ?
 							color : p->bgColor;
 				}
 	}
@@ -319,7 +319,7 @@ void macDrawPixel(int x, int y, int color, void *data) {
 void MacWindowManager::drawDesktop() {
 	Common::Rect r(_screen->getBounds());
 
-	MacPlotData pd(_screen, &_patterns, kPatternCheckers, 1, _colorWhite);
+	MacPlotData pd(_screen, &_patterns, kPatternCheckers, 0, 0, 1, _colorWhite);
 
 	Graphics::drawRoundRect(r, kDesktopArc, _colorBlack, true, macDrawPixel, &pd);
 
diff --git a/graphics/macgui/macwindowmanager.h b/graphics/macgui/macwindowmanager.h
index c412e64f0a..5846bcba07 100644
--- a/graphics/macgui/macwindowmanager.h
+++ b/graphics/macgui/macwindowmanager.h
@@ -83,11 +83,13 @@ struct MacPlotData {
 	Graphics::ManagedSurface *surface;
 	MacPatterns *patterns;
 	uint fillType;
+	int fillOriginX;
+	int fillOriginY;
 	int thickness;
 	uint bgColor;
 
-	MacPlotData(Graphics::ManagedSurface *s, MacPatterns *p, int f, int t, uint bg) :
-		surface(s), patterns(p), fillType(f), thickness(t), bgColor(bg) {
+	MacPlotData(Graphics::ManagedSurface *s, MacPatterns *p, uint f, int fx, int fy, int t, uint bg) :
+		surface(s), patterns(p), fillType(f), fillOriginX(fx), fillOriginY(fy), thickness(t), bgColor(bg) {
 	}
 };