bitmap_byte       612 modules/zebra.c     unsigned int v, bitmap_byte;
bitmap_byte       649 modules/zebra.c                 bitmap_byte = (y + viewport_yoffset) * viewport_byte_width + 2*(x + viewport_xoffset);
bitmap_byte       675 modules/zebra.c                 draw_dblpixel_raw(bitmap_byte, clr[sel].yuv, clr[sel].op);