max(), min(), and range() will provide the maximum and minimum
integer values found in the bm_bitmap(), bm_list(), or bm_list() objects.
The other four S3 base::Summary methods - all(), any(), sum, and prod -
are only supported for bm_bitmap() objects
(which are subclasses of integer matrices).
Examples
font_file <- system.file("fonts/spleen/spleen-8x16.hex.gz", package = "bittermelon")
font <- read_hex(font_file)
min(font)
#> [1] 0
max(font)
#> [1] 1
range(font)
#> [1] 0 1