JPH0814755B2 - How to display characters / symbols - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a map, a drawing, and a method of displaying document information, and in particular, it is possible to display drawings and document information including characters and symbols of various sizes in an arbitrary manner. The present invention relates to a display method suitable for displaying at a magnification rate.

[Conventional technology]

In conventional systems such as CAD and word processors, in addition to figures, drawings and document information including character / symbol data are displayed on a display device such as a CRT or liquid crystal.
It is configured to add processing such as search and edit interactively. In particular, the literature (Pixel, March 1984, No. 1)
8, pp.58-104, published by Graphic Information Processing Center. In the map / drawing information processing system, attributes such as size / tilt / font in which character / symbol data is stored in the drawing information table in advance. It is configured to display according to the value and interactively add various search / edit processing.

[Problems to be solved by the invention]

Conventionally, in such a system, there is a large demand for dynamically adding a detail enlarging process or a reducing process for seeing through the whole, and it is possible to display by using the character / symbol attribute data stored in advance in a file or memory. Many. However, in such a conventional technique, when the small area is enlarged, the font quality of the displayed characters / symbols is not good, and when the wide area is reduced, a display request with a resolution higher than that of the display device is made. Therefore, there is a problem that the displayed characters and symbols become unreadable.

The object of the present invention is to provide a display request for characters / symbols with any display size including such enlargement / reduction,
It is to provide a display method for obtaining a clear display result on a display screen.

[Means for solving problems]

The present invention provides graphic data for constructing a map or drawing, a data storage unit for storing character / symbol data including height / width data of characters / symbols, the graphic data and the character / symbol data. In order to share the display unit for displaying and the character / symbol data, according to the display dimensions on the display unit, (1) the coordinate sequence of the character / symbol ring line, or the coordinate sequence. Pointer information or control bit information, (2) character / symbol centerline coordinate sequence, pointer information or control bit information for sharing the coordinate sequence, (3) raster image black / white dot pattern, and (4) ) A font data storage unit that stores font data that is grouped into a plurality of sets including a dot pattern according to a gray value, an operation input unit that specifies a display request to the display unit, and the figure A processing unit for executing processing required to display the shape data and the character / symbol data on the display unit, and the processing unit displays graphic data and character / symbol data on the display unit. In this case, when a display request is input from the operation input unit, the graphic data in the area required for display is cut out from the data storage unit and displayed on the display unit, and the character data from the data storage unit is displayed. Using the height and width data of the characters / symbols of the symbol data, it is converted to the display dimensions of the characters / symbols on the display unit, and the converted display dimensions are the above-mentioned fonts for the prescribed minute dimensions. (4) in the data storage unit, (2) in the font data storage unit for a predetermined small size, (3) in the font data storage unit for a predetermined medium size, a predetermined large size. For dimensions Select (1) in the font data storage unit, and use the selected font data, or (1) and (2), even if there is no corresponding font data, the pointer information or the control bit information The character / symbol data is displayed on the display unit by using a part of the coordinate sequence associated with each other.

[Action]

When displaying characters / symbols with a small display size by such a display method, it is unreadable on the display device by using a font dictionary based on the shin line vector or a font dictionary considering the gray value. It has the effect of expanding the range of the minimum size of the characters and symbols. On the other hand, in the case of displaying characters / symbols having a large display size, by using a ring-shaped font dictionary or the like, there is an effect that it is possible to perform a larger-scale display with a quality higher than that of the screen line vector font.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 2 shows an example of the configuration of a system for carrying out the present invention. 100 is a CPU that executes processing, 101 is a file device for storing maps and drawing data, and 102 is editing and searching. Main memory for storing programs for executing various processes and data being processed, 103 CRT for displaying processing results, 104 keyboard for entering commands and parameters, 105 for display 3A and 3B respectively show a font storage memory for storing the fonts of the characters and symbols. In particular, the structure of the map and drawing data stored in the file device 101 is as follows. For example, graphic components are stored in a graphic table of the type shown in FIG. In this figure table, the number of constituent points N of the line segment, the line type information, the line number T, and the coordinate data {X (1), Y
(1) ... X (N), Y (N)} is stored. On the other hand, the character / symbol table is stored in the character / symbol table having the format shown in FIG. In this character / symbol table, the number of characters N, font type C, box width BW, box height BH, inclination angle TH, reference X, coordinate X (0), reference Y coordinate Y
(0) and the character code {CD (1) ... CD (M)} are stored. The font table of characters and symbols stored in the font storage memory 105 has a structure as shown in FIG.

In the above configuration, when a display request is issued from the keyboard 104, the procedure for displaying a map or drawing data on the CRT 103 is as follows. keyboard
When a command is input from 104, the program in the main memory 102 is started, and from the map and drawing data stored in the file device 101, by the method as shown in Japanese Patent Application No. 60-38725. Cut out the area required for display. As a result, the graphic components to be displayed are classified by coordinate data from the graphic table of FIG. 3 ((x (1), y (1), (x (2), y (2)) ... (x
(N), y (n))} is read onto the main memory 102, and the CPU 100 develops these data into graphic data such as points, lines and planes.
On the other hand, for character / symbol data, from the character / symbol table in Fig. 4, use the box width BW and box height BH to display the CRT1
Convert to the absolute display size on 03, find the font group that matches the adaptive size in the font table in Fig. 5 and also match the font type, and further, font data that matches the character code in Fig. 4 {( x _m1 , y _m1 ), (x _m2 , y _m2 ),…, (x _mm ′,
y _mm ′)} is calculated. Then, the CPU 100 generates a character corresponding to this coordinate sequence and displays it on the CRT 103 in the format shown in FIG. 6 with the reference coordinate (X (0), Y (0)) in FIG. 4 as the center.

Here, the font table in FIG. 5 will be described in more detail. The font data in this table are as follows:
(2) Although it is shown as a coordinate sequence that constitutes the center line of a character, etc., (3) a black and white dot pattern of a raster image,
(4) A dot pattern or the like that takes into consideration the shade values of black, white, and gray may be used. Considering the current CRT as the display device of FIG. 2 103, the average number of scanning lines is about 3 lines / mm, and assuming that the display target is, for example, the Mincho type Kanji with 24 × 24 dots, the minimum character size. Requires an absolute size of about 8 mm. However, when displaying character / symbol data other than this size, the enlarging / reducing processing time of the image is generally long, so use dot fonts prepared separately for each size, or use the centerline font described in the vector coordinate example. The speed is increased by using a circle line font. Therefore, next, a method for switching to an optimum font for displaying character / symbol data having an arbitrary size using these fonts will be shown.

(Step 1) First of all, as the display size of characters / symbols, those of 2 mm or less are "small size", those of 2-8 mm are "small size", those of 8-10 mm are "medium size", those of 10 mm or more. Are classified as "large size". This ranking depends on the complexity of the symbols / characters and the resolution of the display device, and the ranking shown here is not absolute.

(Step 2) Next, for each rank, the correspondence of the display fonts described above is set to (4) for small size, (2) for small size, (3) for medium size, and (1) for large size. To decide. This is because in the case of small size, the centerline font describes the display elements with lines rather than the dot font, which has the advantage of less crushing. This is because the enlargement processing procedure is easier for fonts.

(Step 3) Then, by a method described later, the display absolute size of the character / symbol data to be displayed on the display device is obtained, and it is determined to which position of the rank defined in the previous step the size belongs. Then, select a font having a corresponding relationship for each rank. For example, if the absolute display size is
When displaying 7mm characters, the rank belongs to small, so
Select the centerline font as the font associated with that rank.

Further, a plurality of groups of these font data are prepared for each font type such as Mincho typeface and Gothic typeface. in this case,
When storing font data with coordinate values indicating a center line and a ring line, even if the same character code is used, multiple sets will be prepared for each adaptive size for the same font type.
There is a problem that the capacity of font data increases. Therefore,
The coordinate value itself that constitutes the font is not used as the font data, but the control data indicating the presence or absence of the coordinate data and the pointer indicating the coordinate position are stored in the font data to reduce the total font data capacity. Use the method. Regarding the grouping of this method,
This will be described with reference to FIGS. 8 and 9. FIG. 7 is a diagram showing the font data in the font table. For example, (a) is an example of the center line font of the Chinese character “” and “(c)” is an example of the ring-shaped line font. The storage format of these fonts in the font table is shown in FIG. That is, according to the font type such as Gothic font or Mincho font, the adaptive size for switching fonts according to the display size on the display device 103, and the font symbol values of characters and symbols are stored in each font series. It is composed of font data and a flag value for distinguishing whether the font data is a center line or a contour line or whether pointer information is stored. In this case, FIG. 8 shows an example in which numerical values having the following correspondences are assigned as flag values.
First, if the font coordinate value itself is stored in the center line font, 100, and if it is the contour line, 11
On the other hand, a value such as 0 is assigned when the pointer for forming the reduced font is stored in the center line font, and a value such as 111 is assigned for the pointer and the contour line. Further, the method of storing the pointer information in this font data will be described in detail according to FIG. When the center line font of the character corresponding to the font code "BDE8" is given as shown in Fig. 7 (a), the relative coordinate value centering on the character generation reference point 0 (0 _x , 0 _y ) is used as the font data. In the form of, a sequence of points ((R ₁ , R ₂ … R ₉ ) (R ₁₀ , R ₁₁ … R ₁₄ ) (R ₁₅ , R ₁₆ …)
In the order of R ₂₆ )), the (x, y) coordinate values are shown in FIG. 5 {(x ₁ , y ₁ ) (x ₂ , y ₂ ) ... (x ₉ , y ₉ )) ((x ₁₀ , y ₁₀ )
...)} is stored. On the other hand, as an example of the reduced display font, as shown in FIG. 7 (b), it is constructed by using a part of the coordinate values in (a). That is, the coordinate values are not stored in the order of the point sequence ((P ₁ , P ₂ ... P ₅ ) (P ₆ , P ₇ , P ₈ ) (P ₉ ... P ₁₃ )), but instead of FIG. 1 4 5 7 9) (10 12 14) ...}, enter the pointer information for indicating the position of the coordinate value in (a) above, and share the font data. That is, for example, the point sequence (P ₁ P ₂ P ₃ P ₄ P ₅ ) in the reduced font is
Since the coordinate values corresponding to (R ₁ R ₄ R ₅ R ₇ R ₉ ) in the center line font data in (a) are exactly the same, instead of this, pointer information indicating the position from the beginning of the point sequence is used. Filling in reduces the font data storage capacity. On the other hand, the reduced font of the outline font data minimizes the crushing that occurs when performing reduced display.
Series using the centerline font. In that case, the font data also stores pointer information for sharing the coordinate value to the original contour line data. For example, the point sequence (P ₁ P ₂ ... P ₅ ) in the reduced font of FIG. 7 (d) corresponds to the point sequence (R ₁ R ₃ ... R ₂₀ ) of the contour line font of (c). 8
As shown in the figure, pointer information (1, 3 ... 20) is stored. Further, instead of such pointer information, a control for controlling whether or not to adopt the coordinate value of the font data as in the case where the font type in the lower part of FIG. 8 is Mincho type and the adaptive size is 3. Bits may be stored. That is, the font data of Gothic font / adaptive size 1 is: ((x ₁ , y ₁ ) (x ₂ , y ₂ ) ... (x ₉ , y ₉ )) ((x ₁₀ , y ₁₀ )
(X ₁₁ , y ₁₁ ) ...)}, and if this coordinate data is adopted, a control bit flag of 1 is set, and if not, a control bit flag of 0 is given in correspondence with each coordinate position as follows. .

{(1,0, ..., 1) (0,0, ...)} Semantic information about the font symbols in the font table in FIG. 8 is stored in the flag content table shown in FIG. That is, if the flag value is 100 or 110, it indicates that the substance of the font data itself is stored,
On the other hand, 101 and 111 indicate that pointer information is stored in the font data, and 102 and 112 indicate that control bit information is stored in the font data. And in the latter two cases,
Further, the reference destination in which the substance of the font is stored is also stored.

The capacity for storing such pointers and control bit information is significantly smaller than that for storing coordinate data.

The process from the character / symbol data stored in the format of FIG. 4 to the display on the display device 103 using the font data compressed and stored by the above method is as follows. Become.

<Step 1> From the number of characters M in FIG. 4, M character codes CD
(1) -CD (M) is calculated. Also, the font type is calculated from C and the character display size is calculated from BH.

<Step 2> The character display size is converted into an absolute size on the display device 103, and it is determined which adaptive size the value will be.

<Step 3> Next, referring to FIG. 8, a flag value FL and font data matching the font symbol, font type, and adaptive size.
Ask for FD.

<Step 4> Referring to the flag content table of FIG. 9, the content matching the flag value FL is obtained. If the content is other than the substance, the reference destination is further obtained, and the value of the reference destination is also obtained.

<Step 5> When the content of the flag value obtained in the previous step is a substance, the reference coordinate (X
A character is drawn on the display device with an inclination angle TH around (0), Y (0)).

On the other hand, when the flag value is a pointer, font data is obtained from the entity referred to by the font table, and only the font component indicated by the pointer value is extracted and reconstructed, and then drawing is performed in the same manner as described above. Also, when the flag value is given by the control bit, the font data is obtained from the entity of the font table reference destination, and only the font component indicated by the pointer value is extracted and reconstructed. Draw with.

Next, before actually displaying the character and symbol data on the CRT103, a method for converting the box width BW and box height BH of the character / symbol table in Fig. 4 into absolute dimensions on the CRT in advance. Will be described.

As shown in FIG. 1, a user-defined coordinate system (hereinafter U [X
-Y]) data is converted into a display device coordinate system (hereinafter abbreviated as picture space P [XY]),
Make display data such as figures, characters, and symbols independent of device coordinates. That is, in U [XY], the area to be displayed is defined as a window (w ₁ w ₂ w ₃ w ₄ ), and it is defined as P
Map to the viewport (v ₁ v ₂ v ₃ v ₄ ) in [X-Y] and automatically give the transformation of both coordinate systems. Therefore, the box height BH and the box width BW for defining the size of the character / symbol notation as shown in FIG. 6 have the following relationship in P [X, Y]. Converted to BH ', BW'.

BW '= BW / XFACT / LX BH' = BH / YFACT / LX / k ▲ ▼ is the length of the window in the x direction ▲ ▼ is the length of the window in the y direction ▲ ▼ is the length of the viewport in the x direction ▲ ▼ is the length of the pewport in the y direction k is the dimensional ratio of the viewport (vertical / horizontal) This BW ′, Optimum font data is calculated by calculating BH 'in advance before displaying characters / symbols and using the smaller data of BW' and BH 'to find out which range of the adaptive size the value is. Can be used as the basis for automatically switching.

〔The invention's effect〕

According to the present invention, arbitrary size character / symbol data can be
Since the optimum display font can be selected in consideration of the size on the display device, there is an effect that a clear character / symbol can be displayed on the display device.

[Brief description of drawings]

FIG. 1 is a principle diagram for calculating absolute dimensions on a display device, FIG. 2 is a system configuration diagram, FIG. 3 is an example of a graphic table, FIG. 4 is an example of a character / symbol table, and FIG. An example of a display font table, FIG. 6 is a diagram showing a correspondence relationship between a character / symbol table and an actual display, FIG. 7 is a principle diagram for showing sharing of font data, and FIG. 8 is a character diagram.・
FIG. 9 is a diagram showing a table format for storing font data in which symbols are shared, and FIG. 9 is a diagram showing a table format for storing the meaning of the flags in FIG. In FIG. 2, 100 is a CPU, 101 is a file device for storing maps and drawing data, 102 is a main memory for processing, 103 is a display device for displaying processing results, 104
Is a keyboard, and 105 is a memory that stores fonts for displaying characters and symbols.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location G09G 5/26 G 9377-5H (56) References JP-A-60-80895 (JP, A) Special features Kai 60-90383 (JP, A) JP 58-160981 (JP, A)

Claims (3)

[Claims] 1. A data storage unit for storing graphic data for constructing a map or drawing, and character / symbol data including height / width data of characters / symbols, the graphic data and the character / symbol data. And a display unit for displaying, and (1) the coordinate sequence of the character / symbol ring line or its coordinate sequence is shared according to the display dimensions on the display unit in correspondence with the character / symbol data. Information, or control bit information for (2) a coordinate sequence of the center line of a character / symbol, or pointer information or control bit information for sharing the coordinate sequence, (3) a black and white dot pattern of a raster image, and ( 4) A font data storage unit that stores font data that is grouped into a plurality of sets including a dot pattern based on a gray value, an operation input unit that specifies a display request to the display unit, A processing unit for executing processing necessary for displaying the graphic data and the character / symbol data on the display unit, wherein the processing unit stores the graphic data and the character / symbol data on the display unit. In the case of displaying, when a display request is input from the operation input unit, the graphic data of a portion of the range necessary for display is cut out from the data storage unit and displayed on the display unit, and the character is stored from the data storage unit.・ Character of the symbol data ・ Character on the display unit using the height and width data of the symbol
Converted to the display size of the symbol, the converted display size is (4) in the font data storage unit for a predetermined minute size, and (2) in the font data storage unit for a predetermined small size. )
Select (3) in the font data storage unit for a predetermined medium size and (1) in the font data storage unit for a predetermined large size, and use the selected font data. Or, regarding (1) and (2), even when there is no corresponding font data, the character / symbol data is displayed on the display unit by using a part of the coordinate sequence associated by the pointer information or the control bit information. Display method Character and symbol display method characterized by 2. The method according to claim 1, wherein the font data in the font data storage unit is grouped for each display size and stored for at least one of Mincho and Gothic fonts. Character and symbol display method characterized by the following. 3. In claim 1, as a display size of characters and symbols, a predetermined small size is 2 mm or less, and a predetermined small size is 2 to 8 mm. The size is 8 to 10 mm, and the specified large size is 10 mm
A method for displaying characters / symbols characterized by the above.