Fix T98793: Wayland clamps cursor movement fails with gnome-shell

The current gnome-shell (v42.2) has a bug where grabbing the cursor
doesn't scale the region when confining it to the window.

For Hi-DPI displays this means the cursor may be confined to a quarter
of the window, making grab unusable.

Even though this has been fixed up-stream the issue remains in the
latest release - so workaround the problem by implementing window
confined grab using a software cursor.

This is only used gnome-shell for displays that use Hi-DPI scaling.

1 files changed, 7 insertions, 3 deletions

diff --git a/source/blender/windowmanager/intern/wm_draw.c b/source/blender/windowmanager/intern/wm_draw.c
index 63a7fb5ddaa..abf7aa65da7 100644
--- a/source/blender/windowmanager/intern/wm_draw.c
+++ b/source/blender/windowmanager/intern/wm_draw.c
@@ -158,9 +158,13 @@ static bool wm_software_cursor_needed_for_window(const wmWindow *win, struct Gra
   if (GHOST_GetCursorVisibility(win->ghostwin)) {
     /* NOTE: The value in `win->grabcursor` can't be used as it
      * doesn't always match GHOST's value in the case of tablet events. */
-    GHOST_GetCursorGrabState(
-        win->ghostwin, &grab_state->mode, &grab_state->wrap_axis, grab_state->bounds);
-    if (grab_state->mode == GHOST_kGrabWrap) {
+    bool use_software_cursor;
+    GHOST_GetCursorGrabState(win->ghostwin,
+                             &grab_state->mode,
+                             &grab_state->wrap_axis,
+                             grab_state->bounds,
+                             &use_software_cursor);
+    if (use_software_cursor) {
       return true;
     }
   }