# HG changeset patch
# User Sam Lantinga <slouken@libsdl.org>
# Date 1260545497 0
# Node ID 2b8c1aea633b2589e08ec67b726d40ef9cad17b1
# Parent  07b330419439758e1ed6472a065db1bdcbbb8982
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.

diff -r 07b330419439 -r 2b8c1aea633b src/video/quartz/SDL_QuartzWM.m
--- a/src/video/quartz/SDL_QuartzWM.m	Fri Dec 11 15:24:53 2009 +0000
+++ b/src/video/quartz/SDL_QuartzWM.m	Fri Dec 11 15:31:37 2009 +0000
@@ -151,14 +151,16 @@
 /* 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 */