xwm: set opaque area for non-decorated surfaces

the lack of it was causing ugly artifacts on those.

Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com>

1 files changed, 39 insertions, 2 deletions

diff --git a/src/xwayland/window-manager.c b/src/xwayland/window-manager.c
index 278081a..0831bef 100644
--- a/src/xwayland/window-manager.c
+++ b/src/xwayland/window-manager.c
@@ -600,6 +600,37 @@ weston_wm_handle_unmap_notify(struct weston_wm *wm, xcb_generic_event_t *event)
 }
 
 static void
+weston_wm_window_draw_opaque(void *data)
+{
+	struct weston_wm_window *window = data;
+	struct weston_wm *wm = window->wm;
+	struct theme *t = wm->theme;
+	int x, y, width, height;
+
+	window->repaint_source = NULL;
+
+	if (!window->surface)
+		return;
+
+	weston_wm_window_get_frame_size(window, &width, &height);
+	weston_wm_window_get_child_position(window, &x, &y);
+
+	/* We leave an extra pixel around the X window area to
+	 * make sure we don't sample from the undefined alpha
+	 * channel when filtering. */
+	window->surface->opaque_rect[0] =
+		(double) (x - t->margin - 1) / width;
+	window->surface->opaque_rect[1] =
+		(double) (x + window->width + t->margin + 1) / width;
+	window->surface->opaque_rect[2] =
+		(double) (y - t->margin - 1) / height;
+	window->surface->opaque_rect[3] =
+		(double) (y + window->height + t->margin + 1) / height;
+
+	pixman_region32_init_rect(&window->surface->input, 0, 0, width, height);
+}
+
+static void
 weston_wm_window_draw_decoration(void *data)
 {
 	struct weston_wm_window *window = data;
@@ -666,13 +697,19 @@ static void
 weston_wm_window_schedule_repaint(struct weston_wm_window *window)
 {
 	struct weston_wm *wm = window->wm;
+	void *function;
 
-	if (window->frame_id == XCB_WINDOW_NONE || window->repaint_source)
+	if (window->repaint_source)
 		return;
 
+	if (window->frame_id == XCB_WINDOW_NONE)
+		function = weston_wm_window_draw_opaque;
+	else
+		function = weston_wm_window_draw_decoration;
+
 	window->repaint_source =
 		wl_event_loop_add_idle(wm->server->loop,
-				       weston_wm_window_draw_decoration,
+				       function,
 				       window);
 }