JPS61129683A - Character generation system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a character pattern in which a stored character pattern is thickened and written into an image memory by providing a table for storing thickening patterns. It is related to the generation method.

[Prior art and problems]

Conventionally, in order to generate characters with different thicknesses, it was necessary to memorize all the font patterns even for the same character. However, this method has the disadvantage that it requires an enormous amount of storage capacity.

[Purpose of the invention]

The present invention eliminates this drawback by storing only the basic character pattern by changing the writing start point of the character into the image memory according to the thickening pattern stored as a table. The object of the present invention is to provide a character generation method that can generate characters having multiple types of thickness simply by setting the characters.

[Means to achieve the purpose]

Therefore, the character generation method of the present invention includes a character pattern storage device for storing character patterns, an image memory, a thickening table for storing thickening patterns, a control device, and a thickening information for the control device. means for notifying a character code and character writing start coordinate information, the control device selects a thickening table according to the notified thickening information, and selects a thickening table from among the selected thickening tables. Read the displacement addresses that make up the pattern, add the read displacement address and the notified character writing start coordinates, and use the addition result as the starting point to write the character pattern in the character pattern storage device corresponding to the notified character code. It is characterized in that it is configured to be expanded on the image memory and to perform similar processing on all displacement addresses stored in the selected thickening table.

[Embodiments of the Invention] The present invention will be described below with reference to the drawings. Figure 1 is a diagram to explain the development of character patterns, Figure 2 is a diagram to explain the principle of thickening characters, Figure 3 is a diagram showing an example of thickening characters, and Figure 4 is a diagram to explain how to thicken characters. A block diagram of one embodiment of the invention,
FIG. 5 is a diagram showing an example of the thickening pattern, FIG. 6 is a diagram showing the other side of the thickening pattern, FIG. 7 is a diagram explaining four-way connection, and FIG. 8 is the same as that of FIG. It is a figure explaining the processing of a control device.

As shown in FIG. 1, characters are normally stored as a rectangular pattern of mxn dots, and are developed by specifying a starting point for writing into the image memory.

One way to make a line thicker is to fill it with a circle around each point that makes up the line, as shown in Figure 2.

Using this idea, in order to make characters thicker, it is sufficient to overwrite them while displacing the writing start point in the image memory in a circular manner, as shown in FIG.

In this specification, a set of displacement addresses representing this displacement will be referred to as a thickening pattern.

FIG. 4 shows a block diagram of a character generator according to the invention. In FIG. 4, ■ indicates a character start point indicating section, 2 indicates a control device, 3 indicates a thickening table, 4 indicates a character pattern storage device, and 5 indicates an image memory. The character start point indicating section 1 notifies the control device 2 of the thickness of the character, character writing start coordinates, and character code. Control device 2
selects the thickening table 3 according to the notified character thickness information. Then, one displacement address constituting the thickening pattern is taken out from the selected thickening tape 3, and the character pattern storage device 4 picks it up according to the character code.
The extracted character pattern is extracted from the image memory 5 using the sum of the extracted displacement address and the above-mentioned character writing start coordinates as a starting point, and the extracted character pattern is developed on the image memory 5, and such processing is performed on the selected thickening table 3. This is done for all displacement addresses written in . The thickening cheagle 3 contains all displacement addresses (x+, y+), (xz.

y2), ... (Xn, 3'n)+ ... are stored. The thickening table 3 exists for each type of character thickness. The character pattern storage device 4 stores a plurality of dots.
Stores character patterns in pattern format. The image memory 5 corresponds to, for example, one screen of a display, and the character strings in the image memory 5 are output on the display screen. It is also possible to output the character string of image memo IJ5 using a printer.

As shown in FIG. 5, the thickening table has a displacement address (xfi) with the center of the circle as the origin (0, O).

A set of y,> constitutes one table for each thickness.

The control device 2 sequentially reads the displacement addresses (xn, yy), and overwrites the character pattern in the image memory 5 by using (x+x,, y+y,) as a new character writing start point.

Note that (x, y) indicates the character writing start coordinates instructed by the character writing start point instruction section 1. As a result, characters with a thickness corresponding to the thickening table 3 are generated.

As the thickening pattern, as shown in FIG. 6, using a circumference will shorten the processing time. However, each point constituting the circumference must be connected in four directions. As shown in FIG. 7, the pixels are connected in four directions, ±X and ±y. A circle is approximated by a broken line that connects line segments in eight directions, that is, line segments with an inclination of 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 215 degrees, 270 degrees, and 315 degrees, and this broken line is When used as a thickening pattern to thicken a diagonally descending line, for example, a blank space appears in the thickened line, making it impossible to thicken the line neatly.

FIG. 8 is a diagram illustrating the processing performed by the control device of FIG. 4. The control device 2 selects the thickening table 3 corresponding to the input thickness information.

Next, the displacement address (x+, yt) is read out from the selected thickening table 3, and x+x.

and calculate ytyI. Next, the character pattern corresponding to the input character code is read from the character pattern storage device 4, and the read character pattern is developed on the image memory 5 with the point (x+x1, ytyl) as the starting point. Similar processing is performed for all displacement addresses stored in the selected thickening table 3. In addition, (x, y
) indicates the character writing start coordinates.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it is possible to make characters thicker just by having a basic character pattern, which has the effect of reducing storage capacity.

Further, by having one thickening table for one type of thickness, several types of fonts can be generated with a simple circuit configuration.

[Brief explanation of drawings]

Figure 1 is a diagram to explain the development of character patterns, Figure 2 is a diagram to explain the principle of thickening characters, Figure 3 is a diagram showing an example of thickening characters, and Figure 4 is a diagram to explain how to thicken characters. A block diagram of one embodiment of the invention, FIG. 5 is a diagram showing an example of a thickening pattern,
Figure 6 shows the other side of the thickening pattern, Figure 7 shows the 4
FIG. 8 is a diagram illustrating the direction connection, and FIG. 8 is a diagram illustrating the processing of the control device in FIG. 4. 1...Character start point indicating section, 2...Control device, 3...
- Thickening table, 4...Character pattern storage device,
5... Image memory

Claims (1)

[Claims] A character pattern storage device that stores character patterns, an image memory, a thickening table that stores thickening patterns, a control device, and notifies the control device of thickening information, character codes, and character writing start coordinate information. The control device selects a fattening table according to the notified fattening information, reads displacement addresses constituting a fattening pattern from the selected fattening table, and reads out displacement addresses constituting a fattening pattern. The displacement address and the notified character writing start coordinate are added, and the character pattern in the character pattern storage device corresponding to the notified character code is developed on the image memory using the addition result as the starting point, and the same process is performed. A character generation method characterized in that the character generation method is configured to perform the following for all displacement addresses stored in a selected thickening table.