/usr/include/X11/bitmaps/dot is in xbitmaps 1.1.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #define dot_width 16
#define dot_height 16
static char dot_bits[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x03, 0xf0, 0x0f, 0xf0, 0x0f,
0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf0, 0x0f, 0xf0, 0x0f,
0xc0, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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