JP2953877B2 - Printer control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer control system, and more particularly to a printer control system for a page printer which performs bitmap printing.

[0002]

2. Description of the Related Art Conventionally, this type of printer control system is capable of transmitting all data without checking print data even if blank data is continuously transmitted to bitmap data transmitted from a host. It is sent to the printer.

[0003]

In the conventional printer control method described above, even if continuous blank data exists in the bitmap data sent from the host, the bitmap data is not checked. Since all the bitmap data is sent to the printer, there is a disadvantage that when there is a lot of blank data in the pattern of the bitmap data, the printer output data is wasted and the printing performance is reduced.

[0004]

A printer control system according to the present invention is a printer control system for performing bitmap printing by a page printer, comprising: a pit map reception buffer for receiving pit map data sent from a host; A blank data check section for taking out vertical bits × one row of bits to be simultaneously processed from this bitmap receiving buffer and checking blank data for each block composed of a certain horizontal bit, and the blank data check section comprising a blank block And a data output unit that sends a block that the blank data check unit determines as a non-blank block to the printer as print data as a print data. You.

[0005]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of the present invention.
The embodiment of FIG. 1 includes a bitmap reception buffer 1 for receiving bitmap data sent from a higher order, a blank data check unit 2 for checking blank data in the bitmap reception buffer 1, and a blank block portion. And a data output unit 4 for sending print data to the printer.

FIG. 2 is a flowchart of the processing of the embodiment of FIG. 1. The processing of the embodiment of FIG. 1 will be described below with reference to FIG. First, the bitmap data sent from the host is stored in the bitmap reception buffer 1. Next, the blank data check unit 2 checks blank data (NULL) in the stored bitmap data. For this check, first, an internal counter is cleared (step 101), and the stored bitmap data is searched for blank data using 8 dots horizontally and 8 dots vertically as a block (step 102), and blank data is found. If not, the counter is checked (step 105), and since it is 0, data is output to the output unit (step 106). The data output unit 4 sends the print data to the printer, and updates the X coordinate by 8 by the printer head control unit 3 (step 1).
07), the printer head is moved (step 10).
8). If you find blank data in step 102,
The number of consecutive blank data is searched and counted by the stored bitmap data horizontal size until it is not blank data (steps 103 and 104).
However, when the data is no longer blank data in step 102, the counter in step 105 is checked, the X-coordinate of the count number obtained in step 105 is updated by the printer head controller 3 (step 109), and only the movement of the printer head is performed. (Step 108) In order to search for the next blank data, it is checked whether or not the X coordinate has become the horizontal size of the bitmap data (Step 110), and if not, the process of the blank data check unit 2 is repeated. To return to step 101.

By repeating the above processing for the bitmap data vertical size ÷ 8 times, continuous blank data in bitmap printing is not sent to the printer, and data in bitmap printing is deleted.

[0009]

As described above, the present invention searches for blank data in print data in bitmap printing,
By deleting the blank data in the bitmap printing, the print data can be reduced and the printing performance can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart of a process of the embodiment of FIG. 1;

[Explanation of symbols]

 1 bitmap reception buffer 2 blank data check unit 3 printer head control unit 4 data output unit

Continuation of front page (56) References JP-A-2-11357 (JP, A) JP-A-4-261876 (JP, A) JP-A-4-144759 (JP, A) JP-A-63-222865 (JP) JP-A-60-149475 (JP, A) JP-A-59-180727 (JP, A) JP-A-5-176142 (JP, A) JP-A-61-94940 (JP, U) (58) Field surveyed (Int.Cl. ⁶ , DB name) B41J 5/30 B41J 2/51 B41J 19/18 B41J 29/38 G06F 3/12

Claims (1)

(57) [Claims] In a printer control system for performing bitmap printing by a page printer, a pitmap reception buffer for receiving pitmap data sent from a host, and a vertical bit for performing simultaneous processing from the bitmap reception buffer. × A blank data check unit that extracts bits for one row and checks blank data for each block consisting of a fixed horizontal bit, and moves the printer head for blank blocks when the blank data check unit detects a blank block And a data output unit for sending, to the printer, a block that the blank data check unit determines not to be a blank block as print data.