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backend/x11: set a blank cursor rather than hiding globally

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This actually simplifies the logic since we no longer have to wait for
enter/leave events, and also improves the UX when e.g. handling a crash
with gdb attached.

See #2659
This commit is contained in:
Ilia Mirkin 2021-01-17 18:05:38 -05:00 • committed by Simon Ser
parent 04d89a8bc5
commit 966e653935
4 changed files with 21 additions and 34 deletions
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17
backend/x11/backend.c
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@ -613,6 +613,23 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
x11->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &x11->display_destroy);
// Create an empty pixmap to be used as the cursor. The
// default GC foreground is 0, and that is what it will be
// filled with.
xcb_pixmap_t blank = xcb_generate_id(x11->xcb);
xcb_create_pixmap(x11->xcb, 1, blank, x11->screen->root, 1, 1);
xcb_gcontext_t gc = xcb_generate_id(x11->xcb);
xcb_create_gc(x11->xcb, gc, blank, 0, NULL);
xcb_rectangle_t rect = { .x = 0, .y = 0, .width = 1, .height = 1 };
xcb_poly_fill_rectangle(x11->xcb, blank, gc, 1, &rect);
x11->cursor = xcb_generate_id(x11->xcb);
xcb_create_cursor(x11->xcb, x11->cursor, blank, blank,
0, 0, 0, 0, 0, 0, 0, 0);
xcb_free_gc(x11->xcb, gc);
xcb_free_pixmap(x11->xcb, blank);
return &x11->backend;
error_event: