/* Convert floating point values in [0,1] to device Z coordinates in
* [0, DepthMax].
- * ex: If the the Z buffer has 24 bits, DepthMax = 0xffffff.
+ * ex: If the Z buffer has 24 bits, DepthMax = 0xffffff.
*
* XXX this all falls apart if we have 31 or more bits of Z because
* the triangle rasterization code produces unsigned Z values. Negative