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Pattern
Transparency
Mode Command
The Pattern Transparency Mode command sets the
pattern’s transparency mode to transparent or opaque.
? * v # O
# = 0 - Transparent
1 - Opaque
Default = 0
Range = 0, 1 (other values cause the com-
mand to be ignored)
A transparency mode of “0” (transparent) means that the
white regions of the pattern image are not copied onto the
destination. A transparency mode of “1” (opaque) means
that the white pixels in the pattern are applied directly
onto the destination.
Note When printing white rules, the pattern transparency is
treated as if it were “opaque”; white rules erase black rules
regardless of the transparency mode.
For RGB color images, “white” pixels are those for which all
color primaries are greater than or equal to their white
reference values. For CMY color images, “white” pixels are
those for which all color primaries are less than or equal to
their white reference values.
When using Render Algorithm 2 (?*t2J), black pixels are
affected by the transparency mode instead of white pixels.
White dots introduced in the dithering process are not
subject to transparency modes.
Refer to the preceding definitions and the discussion of
Figure 5-2 and Figure 5-3 for an explanation of the effects
of pattern transparency.
5-8 The PCL Print Model5-8 The PCL Print Model