Newton Developer Technical Information: Newton Programmer's Guide: 2.1 OS Addendum /

Chapter 6 - Drawing and Graphics 2.1 / Drawing and Graphics Reference

Functions and Methods /

GetTone

GetTone(packedRGB)

Returns an integer representing the 4-bit gray tone corresponding to the packedRGB value.

packedRGB

A packed integer representation of an RGB color.

return value

An integer in the range [0,15]; 0 is white and 15 is black.