draw_rectangle    598 libavdevice/xcbgrab.c     draw_rectangle(s);
draw_rectangle    517 libavfilter/vsrc_testsrc.c     draw_rectangle(0, dst, dst_linesize, segment_width, 0, 0, 8, 13);
draw_rectangle    520 libavfilter/vsrc_testsrc.c             draw_rectangle(255, dst, dst_linesize, segment_width,