AstralTransRocketries/ClassiCube
1
0
Fork 0
mirror of https://github.com/ClassiCube/ClassiCube.git synced 2025-09-13 17:47:12 -04:00
Code Issues Packages Projects Releases Wiki Activity

Try to workaround rare corner cases where XI_RawMotion returns absolute instead of relative coords

Browse Source
This commit is contained in:
UnknownShadow200 2020-12-27 00:26:05 +11:00
parent a2d7f4a71a
commit 801e26b03c
1 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
src/Window.c
View File

@ -1922,6 +1922,29 @@ void Window_CloseKeyboard(void) { }
static cc_bool rawMouseInited, rawMouseSupported;
static int xiOpcode;
static void AdjustMovementDelta(double* dx, double* dy) {
/* Despite the assumption that XI_RawMotion is relative, */
/* unfortunately there's a few buggy corner cases out there */
/* where absolute coordinates are provided instead. */
/* The ugly code belows tries to detect these corner cases. */
static double lastX, lastY;
static int valid, fails;
double deltaX, deltaY;
if (valid > 0) return;
/* The default window resolution is 854 x 480, so if there's */
/* a delta less than half of that, then it's almost certain */
/* that the provided coordinates are relative.*/
if (*dx < 300 || *dy < 200) { valid = true; return; }
if (fails++ < 20) return;
if (!valid) { valid = -1; Platform_LogConst("Buggy mouse detected, trying to workaround.."); }
/* Checked over 20 times now, but no relative coordinates, */
/* so revert to calculating delta from absolute coordinates.*/
deltaX = *dx - lastX; lastX = *dx; *dx = deltaX;
deltaY = *dy - lastY; lastY = *dy; *dy = deltaY;
}
static void HandleGenericEvent(XEvent* e) {
const double* values;
XIRawEvent* ev;
@ -1938,6 +1961,7 @@ static void HandleGenericEvent(XEvent* e) {
dx = XIMaskIsSet(ev->valuators.mask, 0) ? *values++ : 0;
dy = XIMaskIsSet(ev->valuators.mask, 1) ? *values++ : 0;
AdjustMovementDelta(&dx, &dy);
/* Using 0.5f here makes the sensitivity about same as normal cursor movement */
Event_RaiseRawMove(&PointerEvents.RawMoved, dx * 0.5f, dy * 0.5f);
}