ref: 595fbddb1c9e152d9080d7b0faa301709fa6466d
dir: /sys/src/cmd/python/Demo/tix/bitmaps/underline.xbm/
#define underline_width 16 #define underline_height 16 static unsigned char underline_bits[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x1c, 0x38, 0x1c, 0x30, 0x0c, 0x30, 0x0c, 0x30, 0x0c, 0x30, 0x0c, 0x30, 0x0c, 0x70, 0x0e, 0xf0, 0x0f, 0xe0, 0x07, 0x00, 0x00, 0xf8, 0x1f};