values[1] = line_width;
xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
xcb_rectangle_t close = {y - w - (2 * line_width), 0, w + (2 * line_width), rect.height};
xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close);
values[1] = line_width;
xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
xcb_rectangle_t close = {y - w - (2 * line_width), 0, w + (2 * line_width), rect.height};
xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &close);