Hash :
d4c0f498
Author :
Date :
2019-01-04T22:09:38
Fixed bug 4255 - SDL_GetGlobalMouseState() returns incorrect Y on secondary display
Julian Raschke
I use an open Mac laptop with an additional external monitor. The coordinate spaces from SDL_GetGlobalMouseState() and SDL_GetWindowPosition() match on the primary display, but not on the secondary display.
Cocoa window coordinates are vertically flipped in relation to the primary display:
https://github.com/spurious/SDL-mirror/blob/release-2.0.8/src/video/cocoa/SDL_cocoawindow.m#L219-L222
However, Cocoa_GetGlobalMouseState inverts the cursor Y coordinate per-display:
https://github.com/spurious/SDL-mirror/blob/release-2.0.8/src/video/cocoa/SDL_cocoamouse.m#L320-L323
Suggested fix: Replace the for-loop with this simpler calculation:
*x = (int) cocoaLocation.x;
*y = (int) (CGDisplayPixelsHigh(kCGDirectMainDisplay) - cocoaLocation.y);