JP3189345B2 - Character display processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character display processing method and, more particularly, to a method for displaying characters on a CRT using a bitmap font.
To display and print the like on the display device or printer, the width and height of the character for each character is related to character display processing method for displaying a character bit map patterns of different proportional fonts.

[0002]

2. Description of the Related Art Conventionally, in order to make a character print state of a document more beautiful and to improve readability, in a printed document such as English or European, a proportional font having a different character width and character height for each character is used. The document is printed using.

Further, even in a document creating apparatus using a recent data processing apparatus, when displaying and printing on a CRT display device or a printer for displaying characters, the characters on a display screen and a printed document look more beautiful, and readability is improved. It is desired to display and print using characters of a proportional font to improve the image quality.

In order to display and print the characters of the proportional font on a display screen and a print document, in addition to the bitmap pattern data of the font itself, the character width, character height, display reference position, next character Display reference position of
Information such as the location (character feed position) is required. For the bitmap format and the attribute information of the character font of the proportional font, see, for example, the document “Character Bitmap Distribution Format 2.1”, Adobe Systems, Ltd., 19
Published in 1987 (“Character Bitmap Distribution Format
2.1 ", Adobe System, Inc., 1984, 1987).

[0005] Thus, in the document processing system for displaying print a proportional font characters on the display screen and printed document as information for displaying a proportional font character, the bit map pattern of the proportional font characters, Coordinates of the display reference position of the bitmap pattern , bitmap pattern
Down size (width and height), the data of the attribute information such as the coordinates of the origin for the next display character must be maintained.

For example, the font data (bitmap pattern) of each character font for displaying and printing the characters "j", "w", and "'" of the proportional font as shown in FIG. Bitmap pattern
The font body and a plurality of pieces of attribute information for displaying the character font are combined and stored in the font data storage unit as one character font information. This will be described more specifically with reference to the drawing. For example, the display device has a structure including display control data as shown in FIG.

In FIG. 5, BBw and BBh are the width and height of the main part of the bitmap pattern of the character font, respectively, and BBox and BBoy are the lower left end of the main part of the bitmap pattern from the origin of the display reference position. Represents the coordinates for positioning. Ex and Ey indicate a point to be the origin of the coordinates of the display reference position of the next character (character feed reference point). Here, a case where a proportional font of three characters “j”... “W”. Fig. 5
For example, for the letter "j", the bitmap
Along with the pattern main body 51, area size information of BBw = 6 and BBh = 19 as information for indicating the size of the area and display reference position as attribute information for positioning the bitmap pattern main body 51 BBox = −1, BBoy = −5 of the position information for arranging the lower left end of the bitmap pattern body portion with respect to the origin of, and Ex = 6, Ey = 0 of the coordinate information of the origin for displaying the next character. Is added as attribute information. Also, the letter "w"
In the same manner, BBw = 14, BBh = 8, BBox = 1, and BBoy together with the bitmap pattern body 52.
= 0, Ex = 16, and Ey = 0. Attribute information for display control is added. Similarly, in the character "'", the bit map pattern body portion 53, BBW = 2, B
Bh = 4 , BBox = 3, BBoy = 10, Ex = 6, Ey
Attribute information for display control of = 0 is added. In FIG. 5, a point indicated by a thick line “ten” character represents the origin of the display reference position of the character, and a thin line “ten” character is indicated.
The point indicated by the character shape represents the origin of the display reference position of the next character.

The process of displaying (printing) characters of a proportional font having such attribute information is executed by the following processes. An origin serving as a display start position is determined, and its coordinates are set to (x ₀ , y ₀ ). Display origin position (bitmap
Find the coordinate value of the position where the lower left corner of the pattern should be placed. _{x d ← x 0 + BBox y} d ← y 0 + BBoy coordinate value of the display origin position obtained (x _d, y _d) so as to match the left lower end of the bit map pattern to the position of the bit of the character font to be displayed Put the map pattern . Displays (prints) the character font to be displayed.
U. Move the origin to the origin for displaying the next character font. x ₀ ← x ₀ + Ex y ₀ ← y ₀ + Ey
Is repeated.

[0009]

As described above, when a character of a proportional font is displayed (printed) on a display screen and a print document in a document processing system,
Every time one character of a proportional font is displayed (printed), the character display process calculates the coordinate position where the bitmap pattern of the proportional font of the corresponding character is placed, and displays the next character for character feed is not I row the calculation of the coordinate position of Narazu, character display processing is complicated, display of character font (printing) speed of processing there is a problem that slow. In particular, there is a problem in document printing that handles a large number of characters that the processing takes a lot of processing time.

[0010] The present invention has been made to solve these problems, an object of the present invention, the bitmap Pas
To display and print the character, such as a CRT display device or a printer using a turn of a character font, the height of <br/> width and character for each character bitmap pattern character of different proportional fonts, fast It is another object of the present invention to provide a character display processing method capable of performing display (printing) processing.

[0011]

Means for Solving the Problems] To achieve the above object, a character display processing method of the present invention, character width, character height
The display reference position and the attribute of the display reference position of the next character
Have sex information, the character display processing method width and height of the character for each character to display characters of the bit map pattern of the different proportional font, display
The width of the bitmap font of the proportional font, character font characters to be displayed from the display reference position of the bit map pattern of the character font to the next
While of the escapement width to the display reference position of the bit map pattern the same, as a bit map pattern of the height of the bitmap of each character font and the same to be displayed bitmap font for each character to be displayed Is stored, and in response to a character display request, the stored bitmap is read, and the bitmap of the next character font is read and displayed continuously in the width direction from the display end position of the bitmap of the previous character font. And

[0012]

In the character display processing method of the present invention, when the width and height of the character for each character to display characters of the bit map pattern of the different proportional fonts, the proportional font to display the character font bitmaps width, character to be displayed from the display reference position of the bit map pattern of the character font to the next
Font and escapement width to the display reference position of the bit map pattern with the same, as a bit map pattern of the height of the bitmap of each character font and the same to be displayed, the bits of each character in the character font to be displayed Store the map. And, according to the character display request,
The stored bitmap is read, and the bitmap of the next character font is read and displayed continuously in the width direction from the display end position of the bitmap of the previous character font.

Thus, even when displaying a character of a proportional font bitmap pattern , each time one character of the proportional font is displayed, the coordinate position where the proportional font bitmap pattern of the corresponding character is placed and the next position are displayed. It is not necessary to calculate the coordinates with the coordinate position for displaying the character, and the display (printing) processing of the character font can be performed at high speed. Further, since the data amount of the attribute information required per character to represent a proportional font characters less <br/> ing, font management and the creation of a font is facilitated. Since the maximum value of the character height of each character pattern can be known in advance, it is easy to secure an area for character display in advance.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a diagram for explaining character font information composed of a bitmap main body and display control attribute information used in a character display processing method according to an embodiment of the present invention. Character font information of each proportional font character used in the character display processing method is displayed.
Character font set of the proportional font to be used
In other words, character width, character height, display reference position,
And the attribute information of the display reference position of the next character.
Proportionally different character width and character height
From the character font set of the font, as shown in FIG.
13 with like, is configured as a single character font information is combined and a plurality of attribute information to the display control of the character, Ru stored in the font data storage unit. Here, in order to perform the character display control of the proportional font character, the bitmap main body adjusts the width of the bitmap of the character font from the display reference position of the bitmap pattern of the character font to the display of the bitmap pattern of the next character. The character feed width up to the reference position is the same,
The bitmap of the proportional font of each character is stored as a bitmap pattern having the same bitmap height for each character font. Therefore, as the attribute information for display control, that stores only the width information Ww areas of the bit map of each character font.

[0015] For example, the character "j", together with the bitmap main body 11, as information for indicating the size of the area, width information Ww = 7 bitmap region Ru is stored as the attribute information. For the character “w”, the width information W of the bitmap area is displayed together with the bitmap main body 12.
w = 16 is stored as attribute information.
With bitmap body portion 13, the width information Ww = 6 of the bitmap area Ru stored as attribute information.

Bitmap main unit 1 for each character font
The height of the bitmap area of the 1,12,13 are identical to Runode, the height information Wh of the bitmap area, Ru Wh = 19 is stored as a common height information. Also, as position information for instructing the display reference position of the character font, when the left end or the right end of the bitmap of the character font is different from the origin of the character, the information Wox indicating the difference between the display start origin and the left end of the bitmap main body. , Information Wex indicating the difference between the display end origin and the right end is added and stored as needed. In the character display processing method here, it is not necessary for all character fonts to have position information of Wox and Wex.

In the character display control process, the storage
This is done by adjusting the width of the bitmap of the character font of the proportional font to the feed width from the origin of the character to the next character (the distance from the origin of the next character). Therefore, the bitmap width becomes the character feed width as it is.

As described above, in the character display process, basically, as the attribute information of each character font for controlling the character display of the proportional font, width information indicating the bitmap width of each character font is used. What is necessary is just to have only Ww. Therefore, the bitmap height (Wh) of the character font of the proportional font is the same for all character fonts, and the bitmap width of the character font is the character feed width. Thereby, in the character display control, the process of calculating the coordinates of the arrangement position of the bitmap becomes unnecessary.

[0019] Thus, in the character display processing of proportional fonts, first, the display screen or the width and height of the bitmap of the character font to be displayed printed on the paper from the origin information of the display reference position location, bit of the character font Map location information (Wox, Wo
By performing the coordinate calculation of y), without performing the coordinate calculation with respect to subsequent positional information of the position of the bit map character font, display control information indicating bitmap width (Ww) as escapement width Just need.

The height of the bitmap of the character font is previously stored in the form of a bitmap for each character font, with the top and bottom of all the characters aligned. When adjusting the height, first align the origin of each character font,
The highest point and the lowest point of all character fonts are set as the highest point and the lowest point of each bitmap, and the bitmap body part of each character font is configured. .

According to the character attribute information, the bitmap pattern is
Proportional that must be positioned and arranged
As described above, by configuring the bitmap main body of each character font with respect to the character font information of the font, when performing the character display (printing) process, the bitmap is placed at the same height (y coordinate). It is only necessary to reduce the width at the position (position), and it is not necessary to calculate the coordinates of the arrangement position in the height direction of the character, and character display processing can be performed.

However, accurate processing may not be possible with only such information. For example, the letter "j" shown in FIG.
Is displayed, character bitmap data is also on the left side of the actual character origin, and if the left end is changed to a position with the origin, one column of bitmap data is lost. When trying to use the bitmap data, the position of the origin is shifted, and the balance is lost. Therefore, in practice, attribute information of a character width that is extended by one dot to the left with respect to the origin serving as the display reference position of the character font is prepared, and all the bitmap data are used. In addition, since the position of the origin remains displaced as it is, in the case where the positions of both ends are displaced as in this example, it is necessary to separately provide this displacement as position information. . If Puroposhi <br/> ® Anal font character font shown in Figure 1 of the "j", for example, the position information may be stored the Wox = -1 as the origin of coordinates, when actually displayed, By shifting the display position by the value stored as the position information of the origin and displaying the original data, the original data (bitmap pattern) can be displayed as it is.

Next, an apparatus configuration for implementing the character display processing method of the present invention in one embodiment will be described. FIG. 2 is a block diagram showing a configuration of a main part of the character display processing device. FIG.
, 21 is an input unit, 22 is a character display processing unit, 23
Denotes a display processing unit, 24 denotes a CRT display, and 25 denotes a font data storage unit. To explain the outline of the configuration of the character display processing device, input information given to the character display processing device is character code data according to a character display request from an application program or the like. Input unit 21
When receiving the character code data according to the character display request, the character display processing unit 22 reads out the bit map corresponding to the given character code from the font data storage unit 25 and sends it to the display processing unit 23. The display processing unit 23 displays this on the CRT display 24.

FIG. 3 is a flowchart showing an example of the processing flow in the character display processing section 22. The character display processing will be described with reference to the flowchart in FIG. First,
In step 31, the character code to be displayed is input, and when one character code to be displayed is obtained, the process proceeds to step 32, where it is determined whether the character code is the end character code. If it is the end character code, the process ends. If it is not the end character code, in the next step 33, it is determined whether or not the character code input in the previous processing step has positional information. If there is no position information, it is sufficient to display the corresponding character font immediately after the character displayed at the previous position. Therefore, the process proceeds to the next step 34, and the corresponding bit map is read. Then, in the next step 35, the character pattern of the extracted bitmap is displayed as it is.
That is, the bitmap is expanded and displayed following the bitmap of the previous character. Then, the process returns to step 31 in order to perform a character display process for the next character code.

On the other hand, if it is determined in step 33 that there is position information (information for moving the reference display position), the corresponding character font is displayed following the character displayed at the previous position. In this case, it is necessary to correct the position based on the position information. Therefore, the process proceeds to the next step 36, in which the corresponding bitmap is read in step 36, and in the next step 37, the read bitmap is replaced with the position information of the attribute information. Then, in the next step 58, the bit map of the character pattern is developed and displayed. Then, in order to perform a character display process for the next character code, the process returns to step 31 and proceeds to step 31.
Is repeated.

Since the character display processing is performed by the above-described processing, the character display control processing is simplified as compared with the character display processing of characters of the conventional proportional font .
Processing speed is improved. Further, since it is possible to know the maximum value of the character height of each character pattern in advance, it is easy to secure an area for character display in advance. Further, the amount of attribute information required for each character for displaying the characters of the proportional font is reduced, so that font management and font creation are facilitated.

As described above, in the character display processing method of this embodiment, the bitmap width of the character font is set to be the same as the width of the character in order to process the display of the proportional font at a higher speed. the information of the character of the feed width and font bitmaps wide common, unifying the height of the bitmap pattern of characters in all character. Thus, corner characters less information required for the table Shimesuru,
Character display (printing) processing can be simplified, and processing can be accelerated.

[0028]

As described above, according to the character display processing method of the present invention, the character display processing of the proportional font is simpler than that of the conventional proportional font. And the processing speed is improved. In addition, since the maximum value of the character height of the bitmap pattern of each character can be known in advance, it is easy to secure an area for character display in advance. Furthermore, quantities less rather Do <br/> because attribute information required per character for displaying a proportional font characters, font management and the creation of a font is facilitated.

[Brief description of the drawings]

FIG. 1 is a view for explaining character font information composed of a bitmap main body and display control attribute information used in a character display processing method according to an embodiment of the present invention;

FIG. 2 is a block diagram showing a configuration of a main part of the character display processing device;

FIG. 3 is a flowchart illustrating an example of a processing flow in a character display processing unit;

FIG. 4 is a diagram illustrating an example of a bitmap for displaying and printing characters in a proportional font.

FIG. 5 is a view for explaining an example of the configuration of conventional character font information of a proportional font including a bitmap body and attribute information.

[Explanation of symbols]

11, 12, 13 ... bitmap main unit, 21 ... input unit, 22 ... character display processing unit, 23 ... display processing unit, 24 ...
CRT display, 25 font data storage, 5
1, 52, 53: Bitmap pattern main body.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G09G 5/00-5/42 G06F 3/12 G06F 17/21 B41J 2/485

Claims (1)

(57) [Claims] 1. A character width, a character height, a display reference position,
And has attribute information of the display reference position of the next character in the character display processing method width and height of the character for each character to display characters of the bit map pattern of the different proportional fonts, the proportional font to display character width of the character font bitmaps from the display reference position of the bit map pattern of the character font of a character to be displayed on the next
Font and escapement width to the display reference position of the bit map pattern with the same, as a bit map pattern of the height of the bitmap of each character font and the same to be displayed, the bits of each character in the character font to be displayed The stored bitmap is read in response to a character display request, and the bitmap of the next character font is continuously displayed in the width direction from the display end position of the bitmap of the previous character font.
A character display processing method characterized by reading and displaying.