JPS6050581A - Character memory system for graphic display unit - 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 [Technical Substances of the Invention] The present invention relates to a character storage method in a graphic display device that stores characters to be displayed in a stroke type.

[Technical background of the invention]

Conventional graphic display devices display characters in a stroke type (so-called brush stroke), in which each character is a set of integral parts, and the coordinates of the start and end points of the line segments are used to display the characters. There are things to remember about methods. When storing characters such as Ao, Kiri, and Persimmon shown in Figure 1 using such a stroke type, there is a method of storing the coordinates of the start and end points of each stroke (line segment) as shown in Figure 2. Third
As shown in the figure, the code is memorized in a single-stroke manner, and when the trace is cut off and cannot be continued, the code that controls all of it (for example, UP)
There is a way to remember. In addition, ■, ■... in Figure 1
...indicates the start and end points of each stroke, and these ■
, . . . are shown in FIGS. 2 and 3.

[Problems with background technology]

By the way, even if you use the conventional memorization method as mentioned above, there are many strokes in the characters, and when it comes to kanji of the J Engineering S level 2 level, the memory capacity (memory capacity of the character font memory) increases and the unevenness increases. If the characters are common but different, each character must be stored separately, which is an inconvenience.

In the example shown in FIG. 1, each character has a fairly common bias. Therefore, the coordinates showing the labor parts of ■, ■, ◎ in Figure 2 and ■, ■, [F] in Figure 31 are different, and the other coordinates are the same for both. There is. Also, the same bang (
Even the pattern (common to the characters used in writing) differed depending on the person who created the pattern, which caused many inconveniences, resulting in the characters being irregular.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a character font memory. An object of the present invention is to provide a character storage method for a graphic display device that has a smaller capacity and fewer irregular characters.

[Summary of the invention]

[Summary of the Invention] The present invention provides a graph/ftsk display device that includes:
a common pattern mesori for storing common patterns such as bias and labor forming various characters; an identification code for identifying whether or not the common pattern can be used and stored in a character font memory;
A conversion table is provided to store the corresponding font storage address in the common pattern memory for the identification code. Access the pattern memory to compose the X5YPJi mark of the common pattern font for the corresponding character, refer to this and the X, X coordinates of the cursor, convert it to the X, After interpolating with a straight line and displaying the common pattern of the corresponding characters,
The above purpose is achieved by eliminating the method of displaying other parts of the corresponding character.

[Embodiments of the invention]

The following is the graphic display device of the present invention: i6
(An example of the u method will be described with reference to the drawings.

FIG. 4 is a block diagram showing an embodiment of a graphic display device to which the character storage method of the graphic display device of the present invention is applied. An input/output interface 1 that sends and receives data to and from the host device vl (not shown) of the d section, a microprocessor 2 that controls the operation of the graphic display device u, and a microprogram for operating the microprocessor 2. A control program memory 3, a work buffer 1 memory 4 used by the microprocessor 2, a character font memory 5 that stores the XSX coordinates of character fonts and age code for identifying whether or not a common pattern can be used, a common pattern memory 6 that uniquely describes common pattern fonts such as ``Label'' in X1Y coordinates, a first conversion table 7 that stores the storage address of the corresponding character in the character font memory 5 from the character code input from the host system, etc.; Character font memory 5
A second conversion table 8 is connected to the common bus 9, which stores the storage address in the common pattern memory 6 of the corresponding common pattern font according to the identification code of the corresponding character stored in the font. Furthermore, this common bus 9 includes a cursor X coordinate register 10 and a cursor Y coordinate register 11 that store the cursor position on the screen for displaying characters, and a character X coordinate register 12 that stores the stroke coordinates XSY of characters.
and character X coordinate register 13 are connected. The X coordinate from the cursor X coordinate register 10 and the X coordinate from the character X coordinate register 12 are input into the screen X coordinate register 14, where the on-screen address of the stroke is created. The X coordinate from the cursor Y coordinate register 11 and the X coordinate from the character X coordinate register 13 are input to the screen X coordinate register 15 which creates the on-screen address of the stroke. The X1Y coordinates on the screen output from the screen X coordinate register 14 and the screen X coordinate register 15 are input to a vector generator 16 that stores two coordinates and generates a straight line between them.

The interpolated data output from the vector generator 16 is input to the screen dot memory 17, where it is stored and then displayed on the CRT monitor 19 via the display circuit 18f.

FIG. 5 is a schematic diagram of the character font memory 5.

The X and X coordinates of the character fonts representing Ao, Paulownia, and Persimmon are stored, and the identification codes 1 of these characters are also stored. This identification code 1 indicates tree bias. FIG. 6 shows a schematic diagram of the second conversion table 8 for indexing the common pattern memory 6, and the address of the common pattern font is stored in a portion corresponding to the identification code o-yn. For example, the address of the tree is stored in the identification code 1 part. FIGS. 7(5) and (c) are schematic diagrams of the common pattern Mesenri 6, where (5) is a tree bias and (B) is an example where word bias is stored. Figure 8 shows examples of common patterns (wood bias and bias) stored in Figure 7 and (b).
'fc is shown.

Next, the operation of this embodiment will be explained according to the operation flowchart shown in FIG. When a display character code is input from a host device (not shown) via the input/output interface 1, in step 101, the microprocessor 2 indexes the first conversion table 7ft, and searches the 5th storage address of the character font corresponding to this display character code. Detect.

Next, in step 102, the corresponding data (character phono X, X coordinate, and identification code) is retrieved from the character font memory 5 using this storage address (here, the retrieval address). Furthermore, in step 103, it is determined whether or not there is an identification code in the extracted data, and if there is, in step 104, the extracted data is temporarily held in the work buffer memory 4, and then, in step 105, the process ends. - Determine whether or not it is a mode.

If it is an end code, the cursor X and Y coordinates of the °C cursor X coordinate register 10 and cursor Y coordinate register 11 are updated in step 106, and - character display is ended.

If there is no exit code in step 105! 14Ili, in step 107K, the microprocessor 2 uses the identification code to F491 the second conversion table 8 to detect the storage address of the corresponding common pattern font,
Next, in step 108, the X and Yll of the corresponding common pattern font are read from the common pattern memory 6.The X coordinate of the read common pattern font is
After the address is updated in step 09, the common pattern font X coordinate is set in the character X coordinate register 13 in step 110. Further, in step 11tVc, the screen X coordinate and X coordinate of the corresponding character font are created in the screen X coordinate register 14 and the screen X coordinate register 15. Next, in step 112, the vector digitizer 16 is activated and the CR
Common characters of the characters to be displayed on the T monitor 19 (Display the turn. Update the address in step 113 to make it common) (data is taken out from the turn memory 6, and in step 114 the end = - word is written in this data) If there is no end code, the process returns to step 109. If there is an end code, the process goes to step 115, where the extraction address (storage address) for the character font memory is determined.
't-After resave, return to step 102.

If it is determined in step 103 that there is no 81-separate code, the process goes to step 116 and the font data taken out from the character font memory 5 is transferred to the character X coordinate register 12.
After updating the extraction address in step 117, data is extracted from the character font memory 5 and set in the character X coordinate register 13. after that,
In step 118, the X1Y coordinates of the corresponding character font on the screen are created using the -plane X coordinate register 14 and the screen ,T
Desired characters are displayed on the monitor 19. Next step 1
At step 201, the take-out address for the character font memory 5 is updated, and the process returns to step 102.

According to this embodiment, a common pattern such as the bias and labor of various characters is recorded in the common pattern memory 6 to indicate that there is a common part in the character fonts in the character font memory 5 that correspond to the input display character code. ii) When a type code is detected, the second conversion table 8 is indexed using this subdivision code, the storage address of the corresponding I: pattern font is retrieved, and the common pattern memory 6 is stored based on this address. The corresponding common pattern font coordinates are extracted, and based on these coordinates, the common pattern part molecules of the character to be displayed are displayed on the CILT monitor 19, and then by displaying other parts, they are stored in the character font memory 5. The data to be stored can be reduced by the portion corresponding to the common pattern, and the capacity of the character font memory 5 can be reduced. In addition, since the common pattern portions of various characters use those stored in the common pattern memory 6, it is possible to align the common portions of multiple characters.
It is possible to make the irregular parts of the characters slightly smaller.

In addition, in the above embodiment, the column in which the present invention is applied to the method of storing the coordinates of the start point and end point of each stroke shown in FIG. It has the same effect.

〔Effect of the invention〕

As described above, according to the character storage system of the graphic display device of the present invention, a common pattern memory is provided for storing common pattern parts such as the bias and font of various characters, and the common pattern part of the characters to be displayed is By fetching the font from the memory and displaying it, the storage capacity of the character font memory can be reduced and the number of irregular characters can be reduced.

[Brief explanation of the drawing]

Figure 1 shows an example of displayed characters, Figure B2 shows a line of conventional stroke-type character storage methods, and Figure 3 shows an example of a conventional stroke-type character storage method. 4 is a block diagram showing an embodiment of the graphic display device to which the character storage method f of the graphic display device line of the present invention is applied, and FIG. 5 is a character font memory 5 shown in FIG. 4. A schematic diagram showing an example of the memory contents of
FIG. 6 is a schematic diagram showing all examples of characters in the notation tU of the first conversion table 8 shown in FIG. 4, and FIG.
FIG. 8 is a schematic diagram showing an example of the storage contents of the pattern memory 6, FIG. 8 is a diagram showing an example of the common pattern portion recorded in the common pattern memory 6, and FIG. It is an operation flowchart figure. 2...Microprocessor 5...Character font memory 6...Common pattern memory 7...Jth conversion table 12...Character X coordinate register 13...Character Y coordinate register 16...Vector generator 19 ...CRT monitor agent Patent attorney Book 1) Takashi Figure 5 Figure 7 Figure 6 Figure 8 utQb U24b

Claims (1)

[Claims] In a graphic display device, a common pattern memory that stores common patterns such as bias and font that form various characters, an identification code that identifies whether or not the common pattern can be used and is stored in a character font memory, and a corresponding identification code. A conversion table is provided that indicates the storage address of the corresponding common pattern font in the common pattern memory, and when an identification code is detected in the character font data in the character font memory corresponding to the input display character code, this identification code is Based on the common pattern, the corresponding common pattern font coordinates are extracted from the memory, and the common part of the characters to be displayed is displayed on the display device using this common pattern font I. Memory method.