Format

Graphic type of the image:

0 = Monochrome; 8 pixels per byte. Each bit represents a colour palette index of 0 or 1. The white colour may vary depending on the display hardware.
1 = 4-bit colour; 2 colour pixels per byte. Each nibble (4 bits) represents a colour palette index of 0 to 15.
2 = 8-bit colour; 1 colour pixel per byte. Each byte represents a colour palette index of 0 to 255.

‍