JPS6285290A - Multicharacter 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]

(Industrial Application Field) The present invention relates to a bitmap display, a multi-character pattern display device. (Prior art and its problems) Recently, bitmap displays that display the contents of a video memory in a raster scan manner bit by bit have become popular. The characters displayed on these displays are often of one size, and even when displaying multi-size character patterns, if characters or patterns of different sizes are displayed on the same line, the bottom edge of each character pattern Or, most of them were aligned with the center line. However, this type of conventional display technology has the drawback that it is impossible to set the display position for each character pattern size, and it is difficult to display character patterns in multiple IA formats. Ta. (Objective of the Invention) The object of the present invention is to eliminate the above-mentioned drawbacks (11), and to provide a multi-character pattern display device that can set a display reference line for each character pattern size and is capable of displaying character patterns in complex formats. There is a particular thing. (Structure of the Invention) The multi-character pattern display device of the present invention is a bitmap display that raster-scans and displays the contents of a video memory bit by bit. When a character pattern is displayed in a line at a position where an alignment line, which is a display reference line, passes, the pattern storage means calculates the position of the alignment line within the character pattern as a displacement from the edge of the character pattern. the horizontal display address of the immediately preceding character pattern displayed in the immediately preceding position on the same line, the horizontal character spacing between the immediately preceding character pattern and the current character pattern, and the immediately preceding horizontal character pattern size; No. 3
It calculates the sum of two values and outputs it as the horizontal display address of the current character pattern, and also calculates the sum of two values: the vertical address of the alignment line in the row and the alignment line position corresponding to the current character pattern size. character pattern address calculation means for outputting the character pattern as the vertical display position of the current character pattern; the character pattern address calculation means reads a character pattern corresponding to the inputted character code and character pattern size from the character pattern storage means and outputs the character pattern address as the vertical display position of the current character pattern; Character patterns of different sizes are displayed in rows aligned with the alignment line by displaying them at positions indicated by character pattern addresses output from the calculation means. (Detailed Description of Configuration) FIG. 1 is a block diagram for explaining the present invention in detail. In Fig. 1, the multi-character pattern display device includes a character pattern storage device 91, an alignment line position storage device 2, and a character pattern address calculation device [3]. This is a schematic diagram of the display contents of character pattern rows to facilitate clarity, and among the character patterns displayed in five rows, the i-1th and 1st rows are mainly displayed from the beginning. In Figure 2, X(i), y[i] is the upper left display position of the i-th character pattern, YS is the vertical position of the alignment line, and LS(i) is the alignment line of the i-th character pattern. Position, 5(i) indicates the size of the i-th character pattern, C indicates the character spacing, and the water direction is the X axis. The vertical direction is represented by the Y axis. In FIG. 1, a single character pattern storage device ml stores character patterns of different sizes, and outputs a character pattern corresponding to the input character code and character pattern size. Next, the alignment edge #storage device jt2 will be explained. The alignment line indicates the display reference line of the character pattern, as shown by the broken line in FIG. The alignment line position indicates the alignment training position within the character pattern, and refers to the total displacement from the edge of the character pattern. In Figure 2, L8+''i-1
], LS(i) indicates the alignment edge ftf, and uses the displacement from the top of the character pattern. The alignment border i' is set for each character pattern size. 3rd ward 1 is p5 for each character pattern size? -a is an alignment table showing an example of the alignment line position, that is, the correspondence between the character pattern size and the alignment line position. The alignment table in the same figure schematically shows the memory contents of the alignment position storage device 2 (shown in Figure 1).
8x18 dots, 24x24 dots. For the 4 Keyaki type character patterns of 30 x 30 dots and 40 x 40 dots, Alignment) 1k4f position i = shown. Left half of the figure d indicates the character pattern size 1
The right half shows the alignment p, ) position corresponding to each character pattern size.
Provide an alignment line at the dot. Said alignment member) 11th place trade record + p device P2'2 prior i
i'y t. It memorizes the alignment line position corresponding to the character pattern size and crease, and by inputting the character pattern size, the corresponding alignment position can be compared. Next, the character pattern address operation is performed. The character pattern alignment calculation unit f3u (shown in FIG. 1) will be explained below.
, the horizontal display address X (1-1) of the i-1st character pattern displayed in the θ1- line. The horizontal character between the i-1st character pattern and the i-th character pattern Calculate the sum of the three horizontal character pattern sizes of the i-th character pattern between C9 and the horizontal display address X(i
] and output as 2. Second, calculate the sum of the vertical address YS of the alignment line in that row and the alignment line position LSCi corresponding to the i-th character pattern size, and output it as the vertical display energization of the i-th character pattern. do. The above explanation can be expressed using a formula as follows. X(i)=X(i-1')+S(i-1)+eY[
i'1-Y8+LS(i) Next, the operation of displaying character patterns of different sizes on the display in alignment with the alignment line will be described. First, the input character code and character pattern size are transferred to the character pattern storage device 1 via signal lines 9005 and 9004, respectively, and the corresponding character patterns are output to the display via signal line 1001. The following operations are performed in parallel with the above operations. Horizontal character pattern display start address X as initial value
[Oh Vertical alignment line position YS, horizontal character spacing C signal line 9002゜9003.9001
(via) to the character pattern address calculation device 3. Based on the initial value, the character pattern address calculation device 3 calculates the
Via signal lines 90o4 and 2001, character pattern size 5(i) and alignment line position LSI''i
] is input, the display addresses X(i), Y(i3 in total, 'JiL,' of the corresponding character pattern are sequentially output to the display via the Sonezowa signal lines 3051 and 3081 according to the above calculation formula. Here, the alignment line position 1Ls (i"l) is read out from the alignment line position storage device 2 via the signal line 2001 in correspondence with the input character pattern size 5(i). (Example) Next 1 The present invention will be explained with reference to Figs. 1 and 4. A magnetic disk for character pattern storage device I shown in Fig. 1,
A nonvolatile storage device such as a ROM, a RAM with a battery, or a bubble memory can be used, and necessary character patterns such as kanji patterns are stored in advance in correspondence with character codes. Also,
The alignment line position storage device 2 can also be realized using a device similar to the character pattern storage device 1, and stores alignment line positions for each character pattern size in advance. Next, FIG. 4, a block diagram showing one embodiment of the character pattern address calculation device 3, will be described. In the figure, character pattern address function jJ[f3 is character spacing register 300 and character pattern size register 30.
1.302 and horizontal display address register 303,
304, a weight direction display address register 306, a horizontal direction display address adder 305, and a vertical direction display address adder 307. First, the calculation operation of the character pattern display address in the horizontal direction will be explained. The horizontal character spacing C is acquired and stored as the initial value of the character spacing register 300Vi via the signal line 9oox. The character pattern size register 301 has a character pattern size of 8 as an initial value via a signal line 9004.

Acquire and memorize [0]. Thereafter, every time there is a request to input character pattern size 8 (t''J), the character pattern size register 30 is
The contents of 1 are transferred to the character pattern size register 302 via the signal line 3011, and the contents of the character pattern size register 302 are further transferred to the horizontal display address adder 305 via the signal p3021. t7 Therefore, the 5 character pattern size registers 301 and 302 contain:
Character pattern size 8(t), 8(t-1) at a certain time
will be memorized respectively. The horizontal direction display address register 303 is set as an initial value of 5, and the horizontal direction display address

[0]
Acquire and memorize. Thereafter, each time there is a request to display a character pattern, the contents of the horizontal direction display address register 303 are transferred to the horizontal direction display address register 304 via the signal line 3o31, and the contents of the horizontal direction display address register 304 are transferred to the signal line 3041. The data is transferred to the horizontal display address adder 305 via the horizontal direction display address adder 305. The horizontal display address adder 305 is connected to the above three registers, that is, the character spacing register 300. Character pattern size register 302. The output of the horizontal direction display address register 304 is added, and the resulting horizontal direction character pattern display address X(i) is output to the display via the signal line 3051, and in parallel with this, the character pattern display address X[ i) is output to the horizontal direction display address register 303. Therefore, horizontal direction display address register 3
03.304 stores the horizontal character pattern display addresses X(i) and x(i-1'l) at a certain time. Next, calculate the vertical character pattern display address. The operation will be explained. The vertical display address register 306 obtains and stores the vertical display address YS as an initial value via the signal line 3061. The vertical display address adder 307 adds the vertical display address YS to the output of the vertical display address register 306. The alignment line position LS(i) obtained from the alignment line position storage device 2 is added via the signal line 22001, and the resulting vertical character pattern display address Y(i) is sent to the signal line 30.
It outputs to the display via 71 and 2. (Effects of the Invention) As explained above, the present invention can display character patterns of different sizes in line with the display reference line, and therefore has an effect suitable for displaying multiple fonts in a rough format.

[Brief explanation of drawings]

Fig. 1 is a block diagram for explaining the present invention in detail, Fig. 2 is a schematic diagram for explaining the operation of the present invention, and Fig. 3 is a schematic diagram of the storage contents of the alignment storage device in Fig. 1. FIG. 4 is a block diagram showing an embodiment of the character pattern address calculation device shown in FIG. 1. 1...Character pattern storage device, 2...
Alignment line position storage device, 3... Character pattern address performance gift, 300... Character spacing register, 301° 302... Character pattern size register, 303° 304... ...Horizontal direction display address register, 3o5...Horizontal direction display address adder% 306...Narrow direction display address register, 3o7...Vertical direction display address addition vessel. Go,

Claims (1)

[Claims] In a bitmap display that raster-scans and displays the contents of a video memory bit by bit, there is a character pattern storage means that outputs a character pattern corresponding to an input character code and character pattern size, and an alignment line that is a display reference line for displaying the character pattern. When displaying a line at a position where the alignment line passes, alignment line position storage means stores the alignment line passing position within the character pattern as a displacement from the end of the character pattern for each character pattern size, and displaying the alignment line at the immediately previous position on the same line. The horizontal display address of the current character pattern is determined by calculating the sum of three values: the horizontal display address of the immediately preceding character pattern, the horizontal character spacing between the immediately preceding character pattern and the current character pattern, and the horizontal immediately preceding character pattern size. Character pattern address operation that calculates the sum of two values: the vertical address of the alignment line in the row and the alignment line position corresponding to the current character pattern size, and outputs the result as the vertical display position of the current character pattern. and reading out a character pattern corresponding to the input character code and character pattern size from the character pattern storage means and displaying it at a position indicated by a character pattern address that is an output of the character pattern address calculation means. A multi-character pattern display device characterized in that a character pattern of a different size is displayed in rows according to the alignment line.