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Fixed bug #898

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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.

--HG--
branch : SDL-1.2
This commit is contained in:
Sam Lantinga
2009-12-11 15:31:37 +00:00
parent 82c1fc4441
commit 5f00bddd50
1 changed files with 4 additions and 2 deletions
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6
src/video/quartz/SDL_QuartzWM.m
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@@ -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 */