/* Vertical offset of the right fringe bitmap. */
signed right_fringe_offset : FRINGE_HEIGHT_BITS;
+ /* 1 means that at least one of the left and right fringe bitmaps is
+ periodic and thus depends on the y-position of the row. */
+ unsigned fringe_bitmap_periodic_p : 1;
+
/* 1 means that we must draw the bitmaps of this row. */
unsigned redraw_fringe_bitmaps_p : 1;