x11: Don't try to use XInput2 multitouch if not supported.

Fixes #5889.
libsdl-org · Jul 4, 2022 · fdb86b8 · fdb86b8
1 parent b085c18
commit fdb86b8
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Showing 2 changed files with 14 additions and 3 deletions.
diff --git a/src/video/x11/SDL_x11touch.c b/src/video/x11/SDL_x11touch.c
@@ -31,9 +31,7 @@
 void
 X11_InitTouch(_THIS)
 {
-    if (X11_Xinput2IsMultitouchSupported()) {
-        X11_InitXinput2Multitouch(_this);
-    }
+    X11_InitXinput2Multitouch(_this);
 }
 
 void

diff --git a/src/video/x11/SDL_x11xinput2.c b/src/video/x11/SDL_x11xinput2.c
@@ -265,6 +265,11 @@ X11_InitXinput2Multitouch(_THIS)
     SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
     XIDeviceInfo *info;
     int ndevices,i,j;
+
+    if (!X11_Xinput2IsMultitouchSupported()) {
+        return;
+    }
+
     info = X11_XIQueryDevice(data->display, XIAllDevices, &ndevices);
 
     for (i = 0; i < ndevices; i++) {
@@ -354,6 +359,10 @@ X11_Xinput2GrabTouch(_THIS, SDL_Window *window)
     XIGrabModifiers mods;
     XIEventMask eventmask;
 
+    if (!X11_Xinput2IsMultitouchSupported()) {
+        return;
+    }
+
     mods.modifiers = XIAnyModifier;
     mods.status = 0;
 
@@ -379,6 +388,10 @@ X11_Xinput2UngrabTouch(_THIS, SDL_Window *window)
 
     XIGrabModifiers mods;
 
+    if (!X11_Xinput2IsMultitouchSupported()) {
+        return;
+    }
+
     mods.modifiers = XIAnyModifier;
     mods.status = 0;