JPS62299893A - Multi-character pattern 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]

3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a bitmap display, particularly a multi-character pattern display device. (Prior Art) A bitmap display is a display device that raster scans and displays the contents of a video memory bit by bit. The characters displayed on these bitmap displays are often of one size, but some books can display character patterns of multiple sizes. In addition, although the line spacing is often fixed, some allow you to set the line spacing to an arbitrary length. (Problem to be solved by the invention) However, these bitmap displays
It did not have a function to automatically display lines at line spacing determined by an arbitrarily set line spacing line length ratio with respect to the current line length. For this reason, when lines of different column lengths are displayed simultaneously on the same screen, it is necessary to specify a line interval corresponding to the length of the current line for each line. In addition, even if only lines of the same length are displayed on one display screen at the same time, when using a digit length that is different from the length used previously, the line corresponding to the length of the new line will be displayed. I needed to specify the interval. An object of the present invention is to provide a multi-character pattern display device having a function of automatically displaying lines at a line spacing determined by an arbitrarily set line spacing line length ratio to the current line length. The purpose is to eliminate the need to specify the line spacing corresponding to the line length for each line, or each time a new column length different from the previously used length is used. (Means for Solving the Problems) The multi-character pattern display device of the present invention is a bit map display that displays the contents of a video memory in a raster scan manner bit by bit. a character pattern storage means for outputting a character pattern corresponding to the character pattern; a horizontal display address of the immediately preceding character pattern displayed at the immediately previous position on the same line; and a horizontal character interval between the immediately preceding character pattern and the current character pattern; character pattern horizontal address calculation means that calculates the sum of the width of the previous character pattern and outputs it as a horizontal direction display address of the current character pattern; Calculate the product of the line spacing and line length ratio, and further calculate the product and
Vertical reference address calculation means that calculates the sum of the maximum character pattern height displayed on the current line, which is input prior to displaying the current line, and the vertical reference address of the immediately preceding line, and outputs the sum as the vertical reference address of the current line. and a character pattern vertical address calculation means that subtracts the input character pattern height from the vertical reference address of the current line and outputs it as the vertical direction display address of the current character pattern, and the input character code and character pattern width are 1. Read a character pattern corresponding to the character pattern height from the character pattern storage means and display it at the position indicated by the character pattern display address determined by the outputs of the character pattern horizontal address calculation means and the character pattern vertical address calculation means. , lines are displayed at line spacing determined by an externally set line spacing/line length ratio to the current line length. (Function) The multi-character pattern display device of the present invention reads a character pattern corresponding to the input character code, character pattern width, and character pattern height from the character pattern storage means,
The horizontal direction display address output by the character pattern horizontal address calculation means, and the vertical direction display address obtained by subtracting the height of the input character pattern from the vertical reference address of the current line by the character butter y vertical address calculation means. The character pattern is displayed at the position on the video memory of the bitmap display indicated by the character pattern display address determined by . The vertical reference address of the current line is determined by the vertical reference address calculation means as the product of the length of the current line inputted prior to the display of the current line and the line spacing line length ratio set from the outside, and the display of the current line. It is determined as the sum of the previously input maximum character pattern height displayed on the current line and the vertical reference address of the immediately preceding line. As described above, the present multi-character pattern display device automatically displays lines at a line spacing determined by an arbitrarily set line spacing line length ratio with respect to the current line length. (Embodiment) FIG. 1 is a diagram showing an embodiment of the present invention. In the figure, the multi-curve pattern display device includes a character pattern storage device 1, a character pattern horizontal address calculation device ft2, a vertical base address calculation device 3, and a character pattern vertical address calculation device 4. The character pattern storage device 1 in FIG. 1 stores character patterns of different heights and widths, and includes a magnetic disk,
A nonvolatile storage device such as a bubble memory or ROM can be used, and the character butter 7 is stored in advance in correspondence with the character code, character pattern width, and character pattern height. One character pattern storage device stores the character patterns corresponding to the character code, character pattern width, and character pattern height inputted via the signal lines 9001, 9002, and 9003, respectively, to the signal line 100.
1 to the display sequentially. FIG. 2 is a schematic diagram of the line display contents of character patterns to facilitate the explanation of the operation of the present invention. The first character pattern is displayed mainly. In the figure, (X[-x]. Y(1-1)) is the upper left display address of the 1st-1st character pattern, and (x[i], Y[Ti:]) is the 1st character pattern. Upper left end display address of the character pattern, YB[l] is the vertical reference address of the 5th line, W[1-11 is the width of the 1st-1st character pattern, W[1] is the 1st character pattern The width and C character spacing are shown respectively. Also, the horizontal direction is represented by a Y-axis that increases toward the right, and the vertical direction is represented by a Y-axis that increases toward the bottom. Next, the operation of calculating the horizontal display address x[1] of the first character pattern by the character pattern horizontal address calculation device 2 shown in FIG. 1 will be described with reference to FIG. Character pattern horizontal address calculation device 2 digits, horizontal direction display address X (1-13, character interval C, character of the 1-1st character pattern displayed on the same line) The sum with the width of the putter 7 w(i-1) is calculated and output as the horizontal direction display address x[1] of the first character pattern.If the above explanation is expressed using a formula, it is as follows: X(i]=XCt-1)+c+w[1-1] FIG. 3 shows the character pattern horizontal address calculation device 2 in FIG.
FIG. 2 is a detailed block diagram showing a specific example of the above. Character pattern horizontal address calculation device 2 digits shown in Figure 3,
Character spacing register 200, character pattern width register 20
1.202, horizontal display address register 203.2
'04, consisting of a horizontal display address adder 205. A signal line 90 is connected to the character spacing register 200 from the outside in advance.
The value of character spacing C is stored through 04. The character pattern width and horizontal direction display address are determined by the signal line 900.
5 to the character pattern width register 202 and the horizontal direction display address register 204, each time a line feed is performed. The initial value W(
0'l and x

Based on [0], via the signal line 9002 [-
Each time the character pattern width W [1] is input, the contents of the character pattern width register 201 are sent to the character pattern width register 202KkL via the signal line 2011, and the contents of the character pattern width register 202 are sent to the signal line 2021. It is transferred to the horizontal direction display address booster 205 via the horizontal direction display address booster 205. Therefore, character pattern widths W[1] and W(1-1) are respectively stored in the character pattern width registers 201 and 202 at a certain time. In parallel with this,
The contents of the horizontal direction display address register 203 are transferred to signal line 2.
031 [7] horizontal direction display address register 204
and further horizontal display address register 204
is transferred to the horizontal display address adder 205 via the signal line 2041. Horizontal display address adder 205, signal line 2001
．． Character spacing C1 character pattern width W [1-1], horizontal display address, respectively input via 2021.2041! Add the three values (1-1) and send the horizontal direction display address x[1], which is the calculation result, to the signal line 2051.
Output to the display via. The character pattern display address x[1] is further transferred to the horizontal direction display address register 203 via the signal line 2051. Therefore, horizontal display address register 203.2
04, the horizontal direction display address X[1],
X(1-1) are respectively stored. FIG. 4 is a schematic diagram of the line display of character patterns to facilitate the explanation of the operation of the present invention, and mainly shows the j-1th line display and the j-th line display. In the same figure, % YB(j-x) is the vertical reference address of the j-1st row, YBCj] is the vertical reference address of the j-th row, (X(1)
, Y(1)) is the upper left display address of the first character pattern in the jth row, H[i) is the height of the first character pattern in the jth row, and r is the row set externally. spacing line length ratio,
L(j) is the column length of the j-th row, maxH[j) F′i-th
Each indicates the maximum character pattern height of the line. Also,
``The horizontal direction is represented by the X-axis increasing toward the right, and the vertical direction is represented by the Y-axis increasing toward the bottom. Next, the operation of calculating the vertical reference address Y B (j) of the j-th row by the vertical reference address calculating device 3 in FIG. 1 will be described with reference to FIG. 4. The three vertical reference address arithmetic units calculate the product of the column length L(j) of the j-th line, which is the current line, and the line spacing/line length ratio r set externally, and calculate the nuclide L(j)xr and the current The jth row is
The maximum character pattern height of the line ll1aXH(j) and the vertical reference address YB(j-13
The sum is calculated and outputted as the vertical reference address YB(j) of the j-th row, which is the current row. If the above explanation is expressed using a formula, it becomes as follows. YB(j)=YB(j-1:)+L(j)xr+max
H(+) FIG. 5 is a detailed block diagram showing a specific example of the vertical reference address calculation device 3 in FIG. 1. The vertical reference address calculation device shown in FIG. 300, digit length register 3011 multiplier 302, maximum character pattern height register 303, vertical reference address register 304, 305, vertical reference address adder 30
Consists of 6. In the line spacing/line length ratio register 300, a value of the line spacing/line length ratio r is stored in advance from the outside via a signal line 9006. The vertical reference address is initialized at the start of screen display by a control signal input to the vertical reference address register 305 via signal line 9007. The initial value Y
Based on B(Q), the digit length T-(j) of the j-th row, which is the current row, is determined via the signal line 9008 before displaying the current row.
When is input, the value of the digit length L(,1) is stored in the digit length register 301. Also, prior to displaying the current line, the value of the digit length L(,1) is stored in the j-th line, which is the current line, via the signal line 9009. When the maximum displayed character pattern height maxH (j) is input, the value of the height maxH [j] is stored in the maximum character pattern height register 303. In parallel with this, further:
The contents of the vertical reference address register 304 are transferred to the signal line 304.
1 to the vertical reference address register 305;
Further, the contents of the vertical reference address register 305 are transferred to the vertical reference address adder 306 via the signal line 3051. The multiplier 302 multiplies the line spacing/line length ratio T input via the signal lines 3001 and 3011 by the value of the digit length Lll of the j-th row, and the multiplication result is sent to the signal line 3.
021 to the vertical reference address adder 306. The vertical reference address adder 306 is connected to the signal line 3o2.
1.3031.3051, the product L [j] jth
-1 row's vertical reference address YB(j-1) is calculated and outputted as the j-th row's vertical reference address YB(jl) via the signal line 3061.Vertical reference address YB(j
:) #i: Furthermore, it is transferred to the vertical reference address register 304 via the signal line 3061. Therefore, the vertical reference addresses YB(j) and YB(j-1) are stored in the vertical reference address registers 304 and 305, respectively, at a certain time. Next, the character pattern vertical address calculation device 4 shown in FIG. 1 will be explained. The character pattern vertical address calculation device 4 is connected to the signal line 900
Each time the character pattern middle height H[1] is input via signal line 3061, the height H[1] is subtracted from the vertical reference address YB(j) of the fifth line input via signal line 3061. By this, the vertical display address Y of the character pattern
[1] is obtained and sequentially output to the display via the signal line 4001. (Effects of the Invention) As described above, according to the multi-character pattern display device according to the present invention, in a bitmap display that displays the contents of a video memory in bits by raster scan, the multi-character pattern display device according to the present invention can be used to arbitrarily control the current length. Lines can be displayed automatically at the line spacing determined by the set line spacing and line length ratio. This feature eliminates the need to specify the line spacing that corresponds to the line length for each line, or each time you use a new column length that is different from the previously used length. This makes it easy to set the ratio to a ratio that is easy for humans to see.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a schematic diagram of the line display contents of a character pattern for explaining the operation of the invention, and Fig. 3 is a character pattern horizontal address calculation in Fig. 1. A block diagram showing a specific example of the device, FIG. 4 is a schematic diagram of a character pattern line display for explaining the operation of the present invention, and FIG. 5 is a vertical reference address calculation device d in FIG. 1.
FIG. 2 is a block diagram showing a specific example of the above. l... Character pattern storage device, 2... Character pattern horizontal address calculation device, 3... Vertical reference address calculation device, 4... Character pattern vertical address S calculation device, 2
00... Character spacing register, 201, 202... Character pattern width register, 2 (13, 204... Horizontal direction display address register, 2 (15... Horizontal direction display address adder, 300... Line spacing line length ratio register,
301... line length register, 302... multiplication 1'J device,
303... Maximum character pattern height register, 304.
305...Vertical reference address register, 306...
Vertical IK reference address adder. Agent Patent Attorney Shinsuke Honjo Figure 1 2oO: Jinuta

Claims (1)

[Claims] In a bitmap display that raster-scans and displays the contents of a video memory bit by bit, a character pattern storage means outputs a character pattern corresponding to an input character code, character pattern width, and character pattern height, and a character pattern storage means outputs a character pattern corresponding to an input character code, character pattern width, and character pattern height, and Calculate the horizontal display address of the previous character pattern displayed at the position, the horizontal character interval between the previous character pattern and the current character pattern, and the width of the previous character pattern, and calculate the horizontal display address of the current character pattern. Character pattern to be output as horizontal address calculation means, calculates the product of the length of the current line inputted before displaying the current line and the line spacing line length ratio set externally, and further calculates the product and the current line length ratio. Vertical reference address calculation means for calculating the sum of the maximum character pattern height displayed on the current line inputted prior to displaying and the vertical reference address of the immediately preceding line, and outputting the sum as the vertical reference address of the current line; character pattern vertical address calculation means for subtracting the input character pattern height from the vertical reference address of the current line and outputting the result as a vertical direction display address of the current character pattern; The character pattern corresponding to the pattern height is read from the character pattern storage means and displayed at the position indicated by the character pattern display address determined by the outputs of the character pattern horizontal address calculation means and the character pattern vertical address calculation means. A multi-character pattern display device characterized by displaying lines at a line interval determined by an externally set line interval line length ratio with respect to the length of the character.