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H.2
Raster Graphics Commands
I
<ESC>*n1R
I
Graphics Resolution
This command sets the graphics resolution in dots per inch
to one of the four available values, depending on the value
of parameter nl. Valid value for nlare:
75, 100, 150 and 300.
For example:
Resolution
75 dpi
100 dpi
150 dpi
300 dpi
Escape Sequence
<ESC>*t75R
<ESC>*t100R
<ESC>*t150R
<ESC>*t300R
The command is only needed in front of downloading a
raster image if the current resolution is incorrect or un-
known.
The default resolution is 75 dots/inch.
If
the command is
sent between Start Raster Graphics and End Raster Graphics
commands, it does not take effect until the next raster
image download.
At resolutions below 300 dots/inch, each dot sent to the
printer is internally converted and printed as a block of
normal dots, as shown below:
300 150 100
000
00
000
o
00
000
75 dots/inch
0000
0000
0000
0000
As a result, changing the resolution has a proportionate
effect on the size of the printed graphics image. For ex-
ample, an image printed at 100 dots/inch will be three
times larger in each direction as the same image printed
at 300 dots/inch.
HP Emulation Mode
H-45
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