Source, Pattern and Destination ; 6.1.1. Set source transparency ; USING GRAPHICS - Page 90

2001/10/02

CHAPTER 2 "PCL" - 70 

6. 

USING GRAPHICS 

This HL Series printer affords the user considerable flexibility in the creation of graphic images. Vector, raster and 
rectangle graphics are available, all of which allow a range of shading and filling options. The HP-GL/2 graphics 
commands that are supported are described in the HP-GL/2 section of this manual. 

6.1. 

Source, Pattern and Destination 

We refer to a printing model in which a source image (the image to be drawn) is applied to a destination image 
(simply the graphics or text that already exist on the page). The source image consists of white space and non-
white areas. The non-white areas are covered by a pattern of some description. The pattern may simply be solid 
black or it may itself consist of white and non-white areas, for example the pattern may consist of vertical spaced 
lines. You can specify the way in which the white and dark areas of the entire source image and the white and 
dark areas of the pattern interact with the destination image to produce the finished effect. 

For example 

Pattern

Source image

Destination image

Possible results

6.1.1.  Set source transparency 

Esc*v#N 

(27)(42)(118)#(78) 

<1Bh><2Ah><76h>#<4Eh> 

• 

This command sets the source image transparency. 

• 

# is either 0 or 1. Set # to 0 to select transparent mode and to 1 to specify opaque mode. 

• 

Transparent mode means that parts of the destination image will be visible through the white space areas of 

the source image when the source image has been printed on top of the destination image. 

• 

Opaque mode means that parts of the destination image will not be visible through the white space areas of 

the source image when the source image has been printed on top of the destination image.