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Note ?*l # O is the PCL Version of the HP-GL/2 MC
command.
This command sets the ROP value which affects not only
PCL operation but also the HP-GL/2 ROP value.
EXAMPLE
The Logical Operation default value is 252 (TSo),
corresponding to a logical function of:
(texture | source)
The result is computed below (source and pattern opaque).
Each column of destination, source, and texture values are
the input to the logical function. The result, 252, is the
value that would be sent to identify the logical operation
(refer to page 5-12 for source/pattern transparency
interactions).
Bits
7 6 5 4 3 2 1 0
Texture 1 1 1 1 0 0 0 0
Source 1 1 0 0 1 1 0 0
Destination 1 0 1 0 1 0 1 0
ROP3 (source & pattern) 1111110 0
(decimal 252)
Table 5-1.Table 5-1. Logical Operation (ROP3)Logical Operation (ROP3)
5-14 The PCL Print Model5-14 The PCL Print Model