A795 User Guide: Programming Supplement
Chapter 4: Programming commands
70
Apply shading to logo (ColorPOS™)
ASCII
GS Ox8B n m o
Hexadecimal
1D 8B n m o
Decimal
29 139 n m o
This command will apply shading effect m to logo n and
store it at index o, also extending width to full horizontal
size if logo n is not at full paper width.
n must be the index value of an existing logo
0 <= m <= 100, possibly resulting in a logo suitable for
background watermark mode use
o can be any value, and the logo will be placed according
to the current setting of user storage into RAM or flash
memory.
An application might use a high value of m to shade out
the logo if the original image has a significant number of
“on” dots to allow for future foreground print readability.
Note: that the old logo size and current justification mode
are used to create a new logo image at full paper width
size by filling in white space at either or both sides if
needed. This new logo will provide for minimal
performance impacts when it is selected for use in
watermark mode.
Merge watermark mode (ColorPOS™)
ASCII
GS Ox8C n m
Hexadecimal
1D 8C n m
Decimal
29 140 n m
Default
0 (off )
This command will insert the logo m as a repeated
background image, similar to printing a visible watermark,
into the print stream. The space between repetitions of this
usually shaded logo will be every n*8 dot rows.
n >0 = number of dot rows x8 to skip before repeating the
merge action
m specifies the index value of the logo. If no logo has been
defined with this index then the command is ignored.
Note: that horizontal placement of a watermark logo was
fixed at the time the logo was Shaded or when it was
downloaded as a full width logo for watermark use. This
command will be ignored if the current logo is not at full
paper width size (see the apply shading to logo command
for preparing logos for watermark use).
The merge process is performed after all other image
formation and takes whatever print raster data is ready to
be put on paper. It “adds” (computer logic OR) the mono
or color bits to the print row. Generally, if the print dot
was to be white or same color as the watermark dot, the
print dot will be the color of the watermark; otherwise it
will be black.
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