diff options
Diffstat (limited to 'xorg-server/dix/getevents.c')
| -rw-r--r-- | xorg-server/dix/getevents.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/xorg-server/dix/getevents.c b/xorg-server/dix/getevents.c index b3bb162ae..4e62507aa 100644 --- a/xorg-server/dix/getevents.c +++ b/xorg-server/dix/getevents.c @@ -1327,6 +1327,7 @@ fill_pointer_events(InternalEvent *events, DeviceIntPtr pDev, int type, RawDeviceEvent *raw; double screenx = 0.0, screeny = 0.0; /* desktop coordinate system */ double devx = 0.0, devy = 0.0; /* desktop-wide in device coords */ + int sx, sy; /* for POINTER_SCREEN */ ValuatorMask mask; ScreenPtr scr; @@ -1369,8 +1370,11 @@ fill_pointer_events(InternalEvent *events, DeviceIntPtr pDev, int type, /* valuators are in driver-native format (rel or abs) */ if (flags & POINTER_ABSOLUTE) { - if (flags & POINTER_SCREEN) /* valuators are in screen coords */ + if (flags & POINTER_SCREEN) { /* valuators are in screen coords */ + sx = valuator_mask_get(&mask, 0); + sy = valuator_mask_get(&mask, 1); scale_from_screen(pDev, &mask); + } transformAbsolute(pDev, &mask); clipAbsolute(pDev, &mask); @@ -1388,6 +1392,18 @@ fill_pointer_events(InternalEvent *events, DeviceIntPtr pDev, int type, /* valuators are in device coordinate system in absolute coordinates */ scale_to_desktop(pDev, &mask, &devx, &devy, &screenx, &screeny); + + /* #53037 XWarpPointer's scaling back and forth between screen and + device may leave us with rounding errors. End result is that the + pointer doesn't end up on the pixel it should. + Avoid this by forcing screenx/screeny back to what the input + coordinates were. + */ + if (flags & POINTER_SCREEN) { + screenx = sx; + screeny = sy; + } + scr = positionSprite(pDev, (flags & POINTER_ABSOLUTE) ? Absolute : Relative, &mask, &devx, &devy, &screenx, &screeny); |