JPH06131132A - Bit map printing system - Google Patents

Abstract

PURPOSE:To control printing operation so that no blank is generated in a print result although a blank is usually generated when a serial printer receives and prints bit map data of bit width less than the longitudinal bit width of the head. CONSTITUTION:The bit map data received from application software 20 are passed through an input bit map data storage area and transferred to an output bit map data storage area 14. Next bit map data are transferred to the storage area 14 through the storage area 11 unless the storage area 14 is full, and part of the data which can not be transferred to the storage area 14 is left in the storage area 11 as data for a next turn. The data in the filled storage area 14 are outputted to a printer 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a bitmap printing method,
In particular, it relates to a bitmap printing method for printing bitmap data output by application software by a serial printer.

[0002]

2. Description of the Related Art Conventionally, with this type of bitmap printing method, dot printing is performed in units of the vertical dot number of the head in a serial printer, so the bitmap data sent from application software is always It is designed to be processed as fixed width bitmap data in vertical bit units.

[0003]

The conventional bitmap printing method described above is used when the application software attempts to perform bitmap printing by sending bitmap data having a smaller bit width in vertical bit units of the head. However, there is a drawback that the printed bitmap has blanks and cannot be printed accurately.

[0004]

A bitmap printing method of the present invention is a bitmap printing method for sequentially receiving and printing bitmap data having a bit width smaller than the vertical bit width of a printer head of a serial printer for printing from a host device. In the first storage area of the bit width of the input bitmap data for storing the bitmap data received from the host device and the print coordinates of the bitmap data each time the bitmap data is received from the host device. No. 1 coordinate memory, a second storage area having a vertical bit width of the printer head for transferring the bit map data of the first storage area, and a second coordinate memory storing print coordinates of the second storage area. And sequentially stores the bitmap data stored in the first storage area in the second storage area.
When the second storage area is full, the full-filled bitmap data is output to the printer, and the bitmap data remaining in the first storage area is used for the second storage area. Storage area of the first coordinate memory, and then the bitmap data from the host device is repeatedly transferred through the first storage area until the second storage area is full, and the value of the first coordinate memory is stored. When the value does not become larger than the value in the second coordinate memory, the data in the second storage area is output to the printer.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.
The embodiment of FIG. 1 shows a printer driver 1, application software 20, and a printer 30, and the printer driver 1 includes a control unit 10, an input bitmap data storage area 11, an input bitmap data print coordinate 1
2, the input bit map data remaining bit width 13, the output bit map data storage area 14, the output bit map data printing coordinates 15, and the output bit map data remaining pit width 16.

The input bitmap data storage area 11 is an area for storing bitmap data for one line of the bitmap output by the application software 20, and the input bitmap data print coordinates 12 are stored in the input bitmap data storage area 11. The coordinates are for printing the bitmap data that has been created, and are updated each time one row of the input bitmap data is stored. The input bit map data remaining bit width 13 stores the bit width of the bit map data remaining in the input bit map data storage area 11. Output bitmap data storage area 1
An area 4 has a pit width equal to the number of vertical dots in one line of the printer and stores a bitmap output to the printer by printing one line. The output bitmap data printing coordinates 15 are coordinates for printing the bitmap data stored in the output bitmap data storage area 14, and the output bitmap data remaining bit width 16 is a bit that can still be stored in the output bitmap data storage area 14. This is the area that stores the width. The control unit 10 receives the bitmap data for each input bit width from the application software 20 and outputs the bitmap data for each output bit width to the printer 30 via each of the storage areas.

FIG. 2 is a flow chart of the processing of the control unit 10, and the operation of FIG. 1 will be described below with reference to FIG. When one line of bitmap data and the print coordinates of the bitmap data are passed from the application software 20, the bitmap data is stored in the input bitmap data storage area 11 and the input bitmap data print coordinates 12, respectively, and the input bit is stored. The number of bits of the input bit width is stored as the remaining bit width in the map data remaining bit width 13 (step 101). Next, the data in the input bit map data storage area 11 is transferred to the output bit map data storage area 14, and the remaining bit width 13 of the input bit map data cannot be transferred to the input bit map data storage area 11 and remains. The bit width is updated (step 102). Next, it is checked whether or not the output bit map data storage area 11 has been stored by the bit width (step 103), and if not stored by the bit width, the output bit map data remaining bit width 16 is updated by the stored bit width. (Step 104), the process returns to step 101, and the application software 20
Repeat the process of receiving the next input bitmap data from. If the bit width has been stored in step 103, the data in the output bitmap data storage area 14 is output to the printer (step 105), and the output bitmap data print coordinates 15 are added by the number of bits of the output bit width. (Step 106). Further, since there is no data to be output in the output bit map data remaining bit width 16, it is updated to the number of bits of the output bit width (step 107). Next, it is checked whether the remaining bit width 13 of the input bitmap data is 0, that is, whether the data remains in the input bitmap data storage area 11 (step 108). If not 0, the process returns to step 102, or if not, it is checked whether the output bitmap data print coordinates 15 are within the range of printable coordinates of the paper (step 109). End,
If it is within the range, the process returns to step 101 and the process of receiving the next input bitmap data from the application software 20 is repeated.

[0009]

As described above, according to the present invention, even when the width of the bitmap data passed from the application software is smaller than the bit width of one line of the printer,
By not outputting to the printer until the bitmap data with coordinates exceeding the print coordinates of the output bitmap data is passed, the bit width of the bitmap data passed from the application software is the bit of one line of the printer. Even if the width is smaller than the width, there is an effect that the printed bitmap can be printed without blank spaces.

[Brief description of drawings]

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

2 is a flowchart of the operation of the embodiment of FIG.

[Explanation of symbols]

 1 Printer Driver 10 Control Unit 11 Input Bitmap Data Storage Area 12 Input Bitmap Data Printing Coordinates 13 Input Bitmap Data Remaining Bit Width 14 Output Bitmap Data Storage Area 15 Output Bitmap Data Printing Coordinates 16 Output Bitmap Data Remaining Bit Width 20 Application software 30 Printer

Claims (1)

[Claims] 1. In a bitmap printing method for sequentially receiving and printing bitmap data having a bit width smaller than a vertical bit width of a printer head of a serial printer for printing from a host device, the bitmap data received from the host device is stored. A first storage area having a bit width of the input bitmap data, a first coordinate memory for storing print coordinates of the bitmap data each time the bitmap data is received from a host device, and a first storage area of the first storage area. A second storage area having a vertical bit width of the printer head for transferring the bit map data, and a second coordinate memory for storing print coordinates of the second storage area are stored in the first storage area. The bitmap data that has been created is sequentially transferred to the second storage area, and when the second storage area becomes full, The full bitmap data is output to the printer, the bitmap data remaining in the first storage area is transferred to the second storage area again, and the bitmap data from the host device is subsequently transferred to the second storage area. The transfer is repeated through the first storage area until the second storage area is full, and the second storage is performed when the value of the first coordinate memory does not become larger than the value of the second coordinate memory. A bitmap printing method characterized by outputting area data to a printer.