OKI ML3390 01091308*01256402 User Manual
Product codes
01091308*01256402
Chapter 11: IBM - Graphics
11-1
Chapter 11: IBM - Graphics
Bit image graphics
One of the merits of dot matrix printing technology is its flexibility
when printing dot patterns. Since you can address every dot within
the printable area, all kinds of graphic objects can be portrayed in
the graphics resolution you choose provided by the printer. Even
the photos in a newspaper, when examined closer, consist of thou-
sands of tiny dots.
when printing dot patterns. Since you can address every dot within
the printable area, all kinds of graphic objects can be portrayed in
the graphics resolution you choose provided by the printer. Even
the photos in a newspaper, when examined closer, consist of thou-
sands of tiny dots.
The programming of dot patterns is a complex task. Even a simple
graphic image can contain several hundred dots and designing rea-
dable characters is frequently associated with trial and error and
considerable programming effort. For this reason, you should use
one of the popular application programs for graphics or poster
printing which supports one of the emulations available with this
printer. These programs make possible, depending on the comple-
xity, the creation on screen of drawings, images or poster type, per-
mit the storing of sketches, merging of several images or objects
and, of course, printing out in different graphic densities, whereby
the program converts the graphics on the screen into graphics data
which the printer can interpret.
graphic image can contain several hundred dots and designing rea-
dable characters is frequently associated with trial and error and
considerable programming effort. For this reason, you should use
one of the popular application programs for graphics or poster
printing which supports one of the emulations available with this
printer. These programs make possible, depending on the comple-
xity, the creation on screen of drawings, images or poster type, per-
mit the storing of sketches, merging of several images or objects
and, of course, printing out in different graphic densities, whereby
the program converts the graphics on the screen into graphics data
which the printer can interpret.
Should you wish to write your own programs for graphics and in-
dividual characters, you should first acquaint yourself in detail
with the way bit image graphics work. Irrespective of whether you
are printing an image or designing downloadable characters and
loading them into the printer, your program always has to define
the pattern of the dots to be printed.
dividual characters, you should first acquaint yourself in detail
with the way bit image graphics work. Irrespective of whether you
are printing an image or designing downloadable characters and
loading them into the printer, your program always has to define
the pattern of the dots to be printed.
Physically, the print head of your printer is constructed with two
vertically arranged columns each of 12 pins. The graphics data for
these 24 pins are, on the other hand, structured into 3 columns lying
one below the other each with 8 dot lines. The data are sent to the
printer as a sequence of bytes each of 8 bits. To each of the eight bits
of these three bytes is assigned a pin of the print head and can ac-
cept the value 1 or 0. With a value of 1, the corresponding pin is
used to print. If a bit has the value 0, the associated pin is not used.
Following an 8-bit graphic is defined.
vertically arranged columns each of 12 pins. The graphics data for
these 24 pins are, on the other hand, structured into 3 columns lying
one below the other each with 8 dot lines. The data are sent to the
printer as a sequence of bytes each of 8 bits. To each of the eight bits
of these three bytes is assigned a pin of the print head and can ac-
cept the value 1 or 0. With a value of 1, the corresponding pin is
used to print. If a bit has the value 0, the associated pin is not used.
Following an 8-bit graphic is defined.