3 files changed, 42 insertions, 15 deletions
diff --git a/src/video/cocoa/cocoa_v.h b/src/video/cocoa/cocoa_v.h
index e81125b5b..97fc23f26 100644
--- a/src/video/cocoa/cocoa_v.h
+++ b/src/video/cocoa/cocoa_v.h
@@ -124,6 +124,15 @@ void QZ_HideMouse();
 
 uint QZ_ListModes(OTTD_Point *modes, uint max_modes, CGDirectDisplayID display_id, int display_depth);
 
+/* Subclass of NSView to fix Quartz rendering */
+@interface OTTD_CocoaView : NSView {
+	CocoaSubdriver *driver;
+}
+- (void)setDriver:(CocoaSubdriver*)drv;
+- (void)drawRect:(NSRect)rect;
+- (BOOL)isOpaque;
+@end
+
 /** Delegate for our NSWindow to send ask for quit on close */
 @interface OTTD_CocoaWindowDelegate : NSObject {
 	CocoaSubdriver *driver;
diff --git a/src/video/cocoa/cocoa_v.mm b/src/video/cocoa/cocoa_v.mm
index 756c86bfb..3abeaad9f 100644
--- a/src/video/cocoa/cocoa_v.mm
+++ b/src/video/cocoa/cocoa_v.mm
@@ -407,6 +407,36 @@ void cocoaReleaseAutoreleasePool()
 	[ _ottd_autorelease_pool release ];
 }
 
+
+
+@implementation OTTD_CocoaView
+/**
+ * Initialize the driver
+ */
+- (void)setDriver:(CocoaSubdriver*)drv
+{
+	driver = drv;
+}
+/**
+ * Define the opaqueness of the window / screen
+ * @return opaqueness of window / screen
+ */
+- (BOOL)isOpaque
+{
+	return YES;
+}
+/**
+ * Draws a rectangle on the screen.
+ * It's overwritten by the individual drivers but must be defined
+ */
+- (void)drawRect:(NSRect)invalidRect
+{
+	return;
+}
+@end
+
+
+
 @implementation OTTD_CocoaWindowDelegate
 /** Initialize the video driver */
 - (void)setDriver:(CocoaSubdriver*)drv
diff --git a/src/video/cocoa/wnd_quartz.mm b/src/video/cocoa/wnd_quartz.mm
index 50712cf9d..9e52e526f 100644
--- a/src/video/cocoa/wnd_quartz.mm
+++ b/src/video/cocoa/wnd_quartz.mm
@@ -62,15 +62,10 @@ class WindowQuartzSubdriver;
 - (id)initWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)styleMask backing:(NSBackingStoreType)backingType defer:(BOOL)flag;
 @end
 
-/* Subclass of NSView to fix Quartz rendering */
-@interface OTTD_QuartzView : NSView {
-	WindowQuartzSubdriver *driver;
-}
-
+/* Subclass of OTTD_CocoaView to fix Quartz rendering */
+@interface OTTD_QuartzView : OTTD_CocoaView
 - (void)setDriver:(WindowQuartzSubdriver*)drv;
-
-- (void)drawRect:(NSRect)rect;
-- (BOOL)isOpaque;
+- (void)drawRect:(NSRect)invalidRect;
 @end
 
 class WindowQuartzSubdriver: public CocoaSubdriver {
@@ -239,13 +234,6 @@ static CGColorSpaceRef QZ_GetCorrectColorSpace()
 {
 	driver = drv;
 }
-
-
-- (BOOL)isOpaque
-{
-	return YES;
-}
-
 - (void)drawRect:(NSRect)invalidRect
 {
 	if (driver->cgcontext == NULL) return;