KR950004219B1 - Method and apparatus for font storage - Google Patents

Abstract

The method improves the restoring efficiency of font memory and access speed of the combination font. The method comprises; a ROM(202) storing program data in order to after access eliminating the unnecessary characteristic pattern; a font ROM(FROM) to store the character pattern(203); a RAM temporary restoring data; a CPU(201) for combining information and recording the unnecessary information.

Description

Method and device for improving storage area of combined fonts

Figure 1 is an example of the initial, neutral, and final fonts called "Wo".

2 is a system diagram applied to an embodiment of the present invention.

3 is a text pattern margin removal flow chart according to the present invention.

4 is a flow chart of character pattern combination processing according to the present invention.

The present invention relates to a data recording method of a font (Font) ROM (ROM), in particular a method for improving the storage area of the combination font to increase the storage efficiency and access speed per unit area of the font memory and Relates to a device.

In general, the font memory is embedded in the form of English, Korean, etc. as it is, and is read and displayed by designation. The character recording form of the font memory is recorded in different forms of initial and final even in the same phoneme in the case of a combination of Korean characters. For example, the first letter "o" of "wo" and the last letter "o" of "row" are stored in different fonts, the first letter "a" of "national" and the last letter "a". It is widely known that forms are recorded differently. On the other hand, the initial, neutral, and final phonemes of letters are designed differently from predetermined areas in consideration of the positions to be arranged when combining them into one letter.

That is, as in the example of FIG. 1, it may be combined into "war" using the initial "o", the neutral "tt" and the final "k". This is an example of the combination. For the combination as described above, the fonts are distinguished by the initial, neutral, and final species in the font-rom, and are built according to the combination type.

The built-in forms of the initial, neutral, and final fontroms are shown in FIG. 1, and the regions "A, B" are provided in order to be balanced when combined in one letter. Therefore, when setting the resolution of a single character ("WAR"), the horizontal "X" and the vertical "Y" occupy a total area of 3XY in the "WAR". However, in the case of the initial, neutral, and thick fontroms as shown in Fig. 1, in order to balance the combination, they occupy A, B of "ㅇ", A, B of "TT", and A of "ㅓ". There is a problem of reducing the data recording efficiency per unit area in the memory recording capacity by affecting four waste of the entire area.

Accordingly, an object of the present invention is to provide a method and apparatus for reducing the area secured by a character pattern recorded in a font ROM to increase data storage efficiency and to increase processing speed in access.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is an exemplary system diagram according to the present invention, in which a ROM (202) storing program data for access and removing unnecessary character patterns, and a FontROM (FROM) storing the character pad ( 204, a RAM (203) that temporarily stores data read from the ROM (202) and the Font ROM (FROM) 204, and a RAM (program) on the ROM (202). To the central processing unit (CPU) 201 for removing unnecessary areas of the character pattern of the font ROM 204 stored in 203, adding and recording information for easy reading, and combining them from the information given at the time of recording. It is composed.

3 is a character pattern margin elimination flow chart according to the present invention, comprising: a first step of checking font information and compression font file read mode in a character pattern bitmap font file read mode; and an offset FFSET when the read mode is used in the first step. ) And the bitmap font of the character pattern is solved and recorded so that the two-dimensional array margin and the pattern are distinguished, and in the second step, the coordinates in which the value of the pattern appears from the two-dimensional array value are obtained. A third step of calculating an area occupied by the character pattern from coordinates; and a fourth step of converting the font area calculation value in the third step into a bitmap and recording it with the calculation information as a compressed font file.

4 is a flow chart of a character pattern combination process according to the present invention, comprising: a first step of reading font area calculation information for each element of a font information file when the compressed font and the font information file are in the read mode; A second process of reading two bytes of a string to check whether each phoneme is separated, and reading the font for each phoneme by referring to the font information and the font information from a font information table, and storing it in an image array; And a fourth process of bitwise ORing each of the image arrays into a character, and outputting an image combined with the character of the third process.

Therefore, a specific embodiment of the present invention will be described in detail with reference to FIGS. 1 through 4, where the central processing unit (CPU) 201 is a system control program from the ROM 202 and a basic font as shown in FIGS. 3 and 4. Remove unnecessary areas as the pattern resolution and store program data in the RAM 203 for quick access, and check whether the bitmap font file and the compressed font file of the font ROM 204 can be read in steps 301 and 303. do. In the read mode (301, 302), the offset OFFSET is set to the initialization state (0). Subsequently, in step 305, the value of the basic font electrolytic resolution 3XY is read from the font ROM 204 and recorded in the RAM 203, and as shown in FIG. Record the conversion in the form of "1". The coordinate at which "1" appears is obtained in step 309.

As shown in the first diagram, the coordinates (Yl) of the "Y" where the first "1" appears by scanning from the top and bottom, the "Y" coordinates (Y2) where the first "1" appears by scanning from the bottom, and the left Scan X to the right where X is the first "1", and scan X to the right where X is the first "1".

Character pattern real area (C, D; C ← X2-X1, D ←) from the coordinates (X1-X2, Y1-Y2) of step (309) to starting point (S) (S ← X1, Yl) in step (311). Y2-YI) and the offset (OFFSET) (OFFSET ← OFFSET + (D + 1) * (C / 8 + 1) are obtained, and the X1-X2 and Y1-Y2 values obtained in step (311) in step (313). Is converted into a bitmap, and it is made into a compressed font file in step 315 and recorded in RAM 203, and in step 317, the S, C, D, and OFFSET are stored as a font information file. When executed by the font, C and D information is recorded based on the starting point (S), so the A and B areas can be made from the recording font resolution, thus saving the recording area by the removed areas 9A and B of the respective font native resolutions. can do.

FIG. 4 is a flowchart for combining from the font file and information recorded by the process of FIG. 3, and checks whether the compressed file and the font information file are in the read mode in step 401. The information file reads S, C, D, and OFFSET from the font information. In operation 405, two bytes of the input string are read, and each character is checked for separation. When the phoneme is separated in step 405, the font for each phoneme is read with reference to S, C, D, and OFFSET of the font information table and recorded according to the image arrangement.

In step 409, the stored values are logically combined into bits according to the respective image arrangements of the initial, neutral, and final characters, and combined into a character image. What is combined in step 409 is output as a combination image in step 411 and executed to the end of the string.

Therefore, as in the first diagram of the related art, only the C and D area values are read from the starting point (S) value without reading all the A and B areas in the X and Y areas, so that the processing speed is increased and more fonts are recorded per unit area in a certain area. You can do it.

As described above, the areas A and B provided for the combination arrangement on the font of each native resolution are deleted, and instead, only the starting point S positions and the stored horizontal and vertical sizes C and D are placed in separate tables. Since it manages by the size of the font memory can be reduced and the processing speed also processes only the necessary parts, there is an advantage to increase the speed.

Claims (4)

A read / write area processing apparatus for a combined font, comprising: a ROM (202) for storing program data for access by removing unnecessary character patterns from the basic resolution of the font, and a font storing the character patterns. A ROM (203) temporarily storing data read from the ROM (FROM) 204, the ROM (202) and the FontROM (FROM) 204, and the ROM (202). Central processing unit (CPU) which controls unnecessary data to be read and added to the font ROM 204 stored in the RAM 203 by the program, adds information for easy reading, and is combined from the information provided at the time of recording (CPU) Apparatus for improving the storage area of the combination font, characterized in that consisting of (201). A recording and improving method of a combined font, comprising: a first step of checking font information and compression font file read mode in the character pattern bitmap font file read mode, and an offset (OFFSET) in the read mode in the first step; A second step of initializing the bitmap font of the character pattern and recoding the two-dimensional array margin and the pattern; and obtaining the coordinates at which the value of the pattern appears from the two-dimensional array value in the second step. And a fourth step of calculating the area occupied by the character pattern from the second step, and a fourth step of converting the font area calculation value in the third step into a bitmap and recording it with the calculation information as a compressed font file. How to improve the storage area of the combined font. 3. The method of claim 2, wherein the third step of coordinate detection scans from the top to the bottom of the basic font resolution to obtain coordinates where the first "1" appears, and scans from the bottom of the font resolution up to the first "1". Obtaining coordinates of the place where appears, scanning from the left of the font resolution to the right to obtain the coordinates of the place where the first "1" appears, and scanning from the top of the font resolution to the right, the coordinates of the first "1" appears Method for improving the storage area of the combination font, characterized in that the step consisting of obtaining. A combination processing method of a combination font, comprising: a first step of reading font area calculation information for each element of a font information file in a read mode of a compression font and a font information file; and two bytes of a character string input in the first step; A second process of checking whether each phoneme is separated and reading fonts of each phoneme by referring to the font information in the font information table and storing them in an image array; And a fourth step of outputting an image combined with the characters of the third step, by combining the bit by logical sum.