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 command 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 255. For CMY color images, “white” pixels are those for

 

which all color primaries are 0.

 

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 Model

EN

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HP L 5 manual Pattern Transparency Mode Command, ? * v # O