Fixed bug #898

Jeremiah Morris 2009-12-09 16:07:17 PST No-op GlobalToLocal translations in fullscreen mode On my MacBook Pro running 10.6, I noticed a small upward bias on mouse movement in a fullscreen SDL application. The app uses WarpCursor and GetMouseState in a loop to measure relative movement. I tracked it down to NSWindow's convertBaseToScreen: routine, which added a 2-pixel offset on the Y coordinate instead of the expected (+0,+0) translation. In fullscreen mode, QZ_PrivateWarpCursor() does not translate the desired position through QZ_PrivateGlobalToLocal() before passing it to the Core Graphics system. However, QZ_GetMouseLocation() does call the reverse QZ_PrivateLocalToGlobal() even in fullscreen mode. This asymmetry caused problems each time the mouse was moved.
libsdl-org · Dec 11, 2009 · ded95e5 · ded95e5
1 parent eb91e2d
commit ded95e5
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/video/quartz/SDL_QuartzWM.m b/src/video/quartz/SDL_QuartzWM.m
@@ -151,14 +151,16 @@ int QZ_ShowWMCursor (_THIS, WMcursor *cursor) {
 /* Convert Cocoa screen coordinate to Cocoa window coordinate */
 void QZ_PrivateGlobalToLocal (_THIS, NSPoint *p) {
 
-    *p = [ qz_window convertScreenToBase:*p ];
+	if ( ! CGDisplayIsCaptured (display_id) )
+		*p = [ qz_window convertScreenToBase:*p ];
 }
 
 
 /* Convert Cocoa window coordinate to Cocoa screen coordinate */
 void QZ_PrivateLocalToGlobal (_THIS, NSPoint *p) {
 
-    *p = [ qz_window convertBaseToScreen:*p ];
+	if ( ! CGDisplayIsCaptured (display_id) )
+		*p = [ qz_window convertBaseToScreen:*p ];
 }
 
 /* Convert SDL coordinate to Cocoa coordinate */