JPH04255896A - Drawing system for character - Google Patents

Abstract

PURPOSE:To reduce a memory and save the labor and time for retrieval as to the character drawing system of a figure display device. CONSTITUTION:A main body information processor 11 is equipped with a storage means 13 stored with character pattern real data and a transfer means 12 which transfers the stored character pattern real data and a drawing processor 14 is equipped with a character drawing processing means 16 which draws characters with the character pattern real data transferred from the main body information processor 11 and a storage means 17 stored with drawn character data.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drawing characters in a graphic display device. In character drawing processing in a graphic display device, character pattern data is stored in a memory within the drawing processing device, so it is necessary to secure a large memory area. In order to reduce the memory area in this way,
It is desirable to reduce costs.

0002

2. Description of the Related Art As a conventional character drawing method, there is one shown in FIG. 4, for example. In FIG. 4, reference numeral 1 denotes a main body information processing device, which has a CPU 2 and a main memory 3, and transfers character data including character codes to a drawing processing device 4. The drawing processing device 4 includes a FIFO (first in first out) memory 5, a CPU 6 having functions as a character search means 6A and a character drawing processing means 6B, and a character pattern memory 7 in which character patterns are stored. ing.

Next, character drawing processing will be explained based on FIG. Character data (including character codes) is transferred from the main body information processing device 1 to the FIFO memory 5. As shown in FIG. 6, the character data is composed of character information data that determines the drawing position and size of a character, and a character code that determines the character. In the character search means 6A, F
A character pattern designated by the character code stored in the IFO memory 5 is retrieved from the character pattern memory 7, and the retrieved character pattern is processed by the character drawing processing means 6B to draw a character. Then, characters were displayed on the CRT display 8.

0004

[Problem to be Solved by the Invention] However, in such conventional character drawing methods, the character patterns necessary for drawing characters are stored in the character pattern memory for the drawing processing device. , a fixed amount of memory space (1M
B or higher), and searching for character patterns using character codes also takes time and effort.

The present invention has been made in view of these conventional problems, and aims to provide a character drawing method that reduces memory and saves time and effort for searching. It is said that

[0006]

[Means for Solving the Problems] FIG. 1 is a diagram illustrating the principle of the present invention. In FIG. 1, 11 is a main body information processing device that processes figures; 14 is a drawing processing device that draws figures;
13 is a storage means of the main body information processing device 11 for storing character pattern actual data, 12 is a transfer means for transferring the stored character pattern actual data, and 16 is a drawing processing device 14 that is transferred from the main body information processing device 11. character drawing processing means for drawing characters using the received character pattern actual data;
Reference numeral 17 denotes a storage means for storing drawn character data.

[0007]

[Operation] Actual character pattern data stored in the storage means of the main body information processing device is retrieved and transferred to the drawing processing device by the transfer means. The character drawing processing means of the drawing processing device draws characters based on the transferred character pattern actual data. After the drawn character data is stored in the storage means, the characters are displayed on the display.

[0008] In the present invention, since a memory area for storing character patterns is not required, it is possible to reduce the memory area and reduce costs. Furthermore, since there is no need to search for character patterns using character codes, it is possible to save time and effort in searching.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. 2 and 3 are diagrams showing an embodiment of the present invention. In FIG. 2, reference numeral 11 denotes a main body information processing device that processes graphics, and the main body information processing device 11 has a CPU 12 and a main memory 13.

The main memory 13 serving as a storage means stores character pattern actual data as shown in FIG. The character pattern actual data consists of character information data indicating the character position and size, and character data of the first character to the nth character, and the character data consists of the data length of the first line segment to the nth line. It consists of data with a data length of minutes. The CPU 12 has a function as a transfer means, takes out actual character pattern data from the main memory 13, and transfers the actual character pattern data to the drawing processing device 14.

The drawing processing device 14 has a FIFO (first-in-first-out) memory 15, a CPU 16, and a frame memory 17. FIFO memory 1
5, character pattern actual data is stored from the main body information processing device 11, and is retrieved in the order in which it is stored. CPU1
Reference numeral 6 has a function as a character drawing processing means, and performs character drawing processing based on the actual character pattern data stored in the FIFO memory 15.

Character data processed by the CPU 16 is stored in a frame memory 17 serving as a storage means. 18 is a CRT display connected to the drawing processing device 14, and character data stored in the frame memory 17 is displayed on the CRT display 18. Next, the operation will be explained.

[0013] The CPU 12 in the main body information processing device 11 is
The actual character pattern data stored in the main memory 13 is extracted and transferred to the drawing processing device 14. The character pattern actual data is stored in the FIFO memory 15 in the drawing processing device 14.
is stored in The CPU 16 takes out the character pattern actual data stored in the FIFO memory 16, performs character drawing processing, and stores it in the frame memory 17.

Character data stored in frame memory 17 is displayed on CRT display 18. In this embodiment, there is no need to store character patterns in a character pattern memory as in the conventional case, so that the memory area can be reduced. Furthermore, since there is no need to search for character patterns from the character pattern memory, it is possible to save time and effort in searching.

[0015]

[Effects of the Invention] As explained above, according to the present invention, there is no need for a memory area to store character patterns, so it is possible to reduce the memory area and reduce costs. . Furthermore, since there is no need to search for character patterns, the effort and time of searching can be saved.

[Brief explanation of the drawing]

[Fig. 1] Diagram explaining the principle of the present invention

[Fig. 2] A diagram showing an embodiment of the present invention.

[Figure 3] Diagram showing an example of character pattern actual data

[Figure 4] Diagram showing a conventional example

[Fig. 5] Explanatory diagram of conventional character drawing processing

[Figure 6] Diagram showing an example of conventional character data

[Explanation of symbols]

11: Main body information processing device 12: CPU (transfer means) 13: Main memory (memory means) 14: Drawing processing device 15: FIFO memory 16: CPU (character drawing processing means) 17: Frame memory (storage means) 18: CRT display

Claims (1)

[Claims] Claim 1: A main body information processing device (11
), and a drawing processing device (14) for drawing figures,
When performing character drawing processing, the main body information processing device (11)
In the character drawing method that transfers character information to the drawing processing device (14), the main body information processing device (14)
11) is a storage means for storing character pattern actual data.
(13) and a transfer means (12) for transferring the stored character pattern actual data, the drawing processing device (14)
is equipped with a character drawing processing means (16) for drawing characters based on the character pattern actual data transferred from the main body information processing device (11), and a storage means (17) for storing the drawn character data. A character drawing method characterized by displaying characters that are