This bug report was migrated from our old Bugzilla tracker.

These attachments are available in the static archive:

• Fix for the bug on OSX (getglobalmousestate_fix.patch, text/plain, 2018-12-13 15:14:13 +0000, 895 bytes)

Reported in version: 2.0.8
Reported for operating system, platform: macOS 10.13, x86_64

Comments on the original bug report:

On 2018-09-09 09:49:45 +0000, Julian Raschke wrote:

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);

Related ticket:

https://bugzilla.libsdl.org/show_bug.cgi?id=2655

On 2018-12-13 15:14:13 +0000, Giovanni Bajo wrote:

Created attachment 3545
Fix for the bug on OSX

I have the same problem: SDL_GetGlobalMouseState() is wrong on double monitor setups on OSX.

The fix suggested in this bug perfectly works. I'm attaching a patch that allows me to use SDL_GetGlobalMouseState() on double-monitor setups correctly. Please apply the fix.

On 2018-12-30 08:22:57 +0000, Giovanni Bajo wrote:

Ping! Can we get this applied?

On 2019-01-05 06:09:57 +0000, Sam Lantinga wrote:

Patch added, thanks!
https://hg.libsdl.org/SDL/rev/74e8ace1b2c3