Riso ComColor X1 series Technical Manual page 345

GDI Controller
2-5. Sequence in Data Transfer from Computers to the Printer
The printer is equipped with a built-in controller.
This is a GDI-based controller, and no optional external GDI controller is needed.
However, because it is GDI-based, the time required to process print jobs varies depending on the performance
of the computer used.
Print jobs are processed as follows and then transferred to the printer.
1. Print job data created by programs installed on the Windows computer are passed to the operating system's
Graphical Device Interface (GDI) as rendering data and converted to bitmap data based on information in the
installed printer driver.
Text (outlined fonts) and graphics are converted to bitmaps matching the printer driver resolution, and the
rendering data comprised of this bitmap data is converted according to the selected screening type (error
diffusion or 70- or 100-line dot screen).
2. The printer driver compresses the bitmap data to make it smaller for transfer.
For this unit, the compressed bitmap data is in a format called RISO RINC/C III, and a controller that
understands the RISORINC/C III format must be in the printer or this data cannot be printed.
3. Data in RISO RINC/C III format is spooled temporarily in the operating system and transferred when the
printer is ready to receive it.
4. When the printer receives print jobs in RISO RINC/C III format, the data is either expanded by the controller
PCB unit to the original bitmap data and sent to the unit that creates data for storage, or it is temporarily saved
on the hard disk in RISO RINC/C III format.
Rev.1.00
Spooler
Bitmap data is compressed and
converted to RINC/C III format
by the printer driver.
Included Printer Driver
Computer running Windows
[ 13-8 ]
Source application
Text
Illustrations
Photos
Text and illustrations are converted to
300x300 or 300x600 dpi bitmap data
to match the printer driver setting.
Photos and similar graphics are
converted to bitmap data applying the
error diffusion or dot screen setting.
Windows OS
GDI