JPH0470799A - Character reproducing device - Google Patents

Abstract

PURPOSE:To eliminate the need for a bit map memory for reproducing characters of large size by providing the bit map memory for character reproduction where contour points reproduced by a contour reproduction part are developed, bit by bit, to coordinate values determined by a decision part. CONSTITUTION:This device is equipped with the contour reproduction part 11 which reproduce contour point array data of character size to be displayed from compressed character data, the decision part which decides whether or not each point of a contour reproduced by the contour reproduction part 11 is in a display area and decides coordinate values on the bit map memory according to the decision result, the bit map memory 13 for character reproduction, and the size is as large as or larger than at least a display area. Further, the device is equipped with a memory control part 14 which performs processes such as the writing of contour point array data in the bit map memory 13, painting, etc. Consequently, the need for a bit map memory of size which is large enough to display the whole character is eliminated and high-speed character reproduction becomes possible.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a character reproducing device that reproduces characters to be displayed on a display screen, etc., and more specifically, the present invention relates to a character reproducing device that reproduces characters to be displayed on a display screen, etc. The present invention relates to a character reproduction device that reproduces characters for output to a specified area of the computer.

[Prior Art] For example, in a character input/editing device or the like, characters of a size larger than the display area 22 may be displayed in a display area 22 set in the form of a window or the like on the display unit 21 as shown in FIG. In this case, only part of the characters are displayed in the 5 display area 22.

To reproduce characters from compressed character data in such a case,
This is generally done as follows.

First, character data is read from a memory storing compressed character data, character outline point sequence data is created, and bit expansion is performed in a bitmap memory for character reproduction.

The expanded contour point sequence data is filled in on the bitmap memory. Thereafter, only the data in the area necessary for displaying on the display area 22 is cut out from the bitmap memory for character reproduction and sent to the display section 21, where it is displayed on the display area 22.

[Problems to be Solved by the Invention] However, the above method bit-expands the outline point sequence in a bitmap memory for character reproduction even for parts that are not displayed.
Filling process is in progress. Therefore, if you want to display only part of a large-sized character, you must prepare a bitmap memory for reproducing the large-sized character. Conversely, even when displaying part of a character, there is a problem in that a character larger than the bitmap memory for character reproduction cannot be displayed.

Another problem is that it takes a lot of time to fill in parts that are not actually displayed.

[Means for Solving the Problems] The present invention has been made based on the above-mentioned points, and is a character reproduction method that uses a bitmap memory for reproducing small-sized characters and can also reproduce part of large characters at high speed. The purpose is to provide equipment.

The feature is that in a character reproducing device that reproduces characters from compressed character data to a specified area of an output part such as a display part, the coordinate value (Xi , Yi), and the coordinate value (X
i, Yi) is the specified area ((X s, Y
s) to (X e, Y e)) and determines the coordinate values on the bitmap memory based on the result of the determination, and the coordinate values determined by the determination section a bitmap memory for character reproduction that bit-expands the contour points Pi reproduced by the contour reproduction section; a memory control section that performs processing such as filling based on the contour points Pi bit-expanded in the bitmap memory; It is to have the following.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of the character reproduction device of the present invention. In FIG. 1, reference numeral 11 indicates an outline reproduction unit that reproduces outline point sequence data of the character size to be displayed from compressed character data, and 12 indicates whether each point of the outline reproduced by the outline reproduction unit 11 is within the display area 22. A determining section 13 performs processing such as determining whether or not the character is displayed, and determining coordinate values on a bitmap memory (to be described later) based on the determination result; 13 is a bitmap memory for character reproduction; , the size is larger than that. In this embodiment, the following explanation will be given assuming that the size of the bitmap memory 13 is the same as the sample of the display area 22. Reference numeral 14 denotes a memory control unit that performs processing such as writing contour point sequence data into the bitmap memory 13 and filling it out.

The operation of the present invention will be explained below according to the processing flow diagram shown in Fig. 3.6 Here, a case will be explained in which a part of the letter "H" is displayed in the display area 22 with the position and size as shown in Fig. 2. do.

First, the contour reproduction section 11 reproduces the coordinate values (X-factor, Y-factor) of one contour point P1 of the character size to be displayed from the compressed character data (Sl in FIG. 3). Contour point P1 reproduced here
The position St value (X-work, Y-work) is a coordinate value on the display unit 21 as illustrated in FIG.

Next, the reproduced coordinate values (xl, y,) are sent to the determination section 12. The determination unit 12 has the start point (Xs, Ys) and end point (Xe, Ye) of the display area 22 in advance as display area information.
information is given. First, the determination unit 12 determines that Ys≦Ywork≦Ye (S2). That is, it is determined whether the Y coordinate value Y of the contour point P1 is within the range of the Y coordinate value Ys"Ye of the display area 22.

If the Y-coordinate value Y is outside the range, the process for that contour point P is finished, and the process moves on to the reproduction of the next contour point P2. In other words, the contour point P1 is not developed into the bitmap memory 13.

On the other hand, the Y coordinate value Y1 is the Y coordinate value Ys−Y of the display area 22.
If it is within the range of e, next it is determined that Xs≦X2≦Xe (S3), and it is determined whether the X coordinate value X1 of the contour point P1 is within the range of the X coordinate value Xs=Xe of the display area 22. Determine whether or not.

If it is within the range, the value obtained by subtracting the coordinate value (Xs, Ys) of the starting point of the display area 22 from the coordinate value (Xl, Y□) of the contour point P□ is set as the coordinate on the bitmap memory 13 (S4). ,
The values (xb, , Yb) are sent to the memory control unit 14.

That is, on the other hand, if the X coordinate value X1 of the contour point P is outside the range of the X coordinate value X5 of the display area 22=Xe, it is determined whether or not X1<Xs (S5). If X engineering is smaller than Xs, the values (xbi, yb,) are stored in the bitmap memory 13.
The upper coordinates are sent to the memory control unit 14 (S6).

The reason why xb□=O is set here is to perform the filling process normally. For example, in order to bit-expand the contour point P1 in Fig. 5 to the position Pi' (0, Ybi) on the bitmap memory 13. This is the process.

Moreover, when X-factor is larger than Xs, that is, when Xo is larger than Xe.

The values (xb work, Yb work) are stored in bitmap memory 13.
The upper coordinates are sent to the memory control unit 14 (S7).

The reason for setting xb = Xe - Xs here is to perform the filling process normally. For example, if the contour point Pi in
On the bitmap memory 13, Pi' (Xe −X
This is a process for bit expansion to the position of s, Y bi).

Next, the memory control unit 14 controls the determination unit 12 as described above.
Bitmap memory 1 for character reproduction sent from
According to the coordinate values (Xb work, Yb work) on 3, "1" is bit-expanded at the coordinates of the bitmap memory 13 (S
8). However, if "1" has already been bit-expanded at the coordinate that is about to be bit-expanded, that coordinate is set to "0."

29 is also a process to ensure that the filling process is performed normally.

When the processing for one contour point is completed as described above, the contour reproduction section 11 reproduces the next contour point and performs the same processing (S9).

In this way, the contour points are sequentially reproduced, and the contour point sequence data is bit-developed in the bitmap memory 13.

FIG. 6 shows a state in which the outline point sequence of the character "H" located at the position illustrated in FIG. 2 is bit-developed into the bitmap memory 13 as described above. In FIG. 6, . is a contour point obtained by bit expansion into the coordinates determined by the above formula, ■ is a contour point determined by the 0 formula, and M is a contour point determined by the 0 formula.

Further, 0 is a coordinate that is set to [0] because a contour point that is once developed as a bit on the bitmap memory 13 has appeared at the same coordinates. In this embodiment, processing is performed by reproducing only the start and end points of a contour point sequence parallel to the X-axis direction as contour point sequence data.

When the contour point sequence data is bit-developed in the bitmap memory 13, the memory control unit 14 transfers the data to the bitmap memory 13.
Fill processing is performed on the top (SlO). The filling process is: - When scanning in the X-axis direction as is done in boat fishing, all OJ data from the first "1" to the next "1" is set to "1". Do it by doing things.

FIG. 7 shows an example in which the data developed in the bitmap memory 13 as shown in FIG. 6 is filled in.

As described above, data for a portion of a filled-in character to be displayed in the display area 22 is formed on the bitmap memory 13.

The data in the bitmap memory 13 created in this way is sent to the display section 21 and displayed on the display area 22.

In the above embodiment, the display area 22 and the bitmap memory 13
We have explained the case where the bitmap memory 13 is the same size, but if the bitmap memory 13 is larger than the display area 22, if the processing is carried out in exactly the same way according to the flowchart in FIG. can form part of the data.

FIG. 8 is a diagram illustrating this state, where 13' is the display area 2.
A bitmap memory with a size larger than 2, 22' indicated by a dotted line is a display area 22 on the bitmap memory 13'.
′ represents the area corresponding to .

As can be seen from FIG. 8, data filled with characters is formed only in the area corresponding to the display area 22' of the bitmap memory 13'.

Also, in the above embodiment, it was explained that the size of the bitmap memory is the same as or larger than the display area, but if characters are not displayed in the entire display area but only in a part of it, , the size of the bitmap memory only needs to be the size of that part.

Although the above embodiment describes the case where characters are displayed in the display area of the display unit, the present invention is not limited to this, and may also be used, for example, when characters are expanded to a specified area of an output memory such as a bitmap memory. included.

[Effects of the Invention] As explained above, the present invention does not require a bitmap memory large enough to reproduce the entire character, and can reproduce part of a large-sized character using a bitmap memory for reproducing small characters. . Moreover, since the filling process is performed only on the area corresponding to the display area, it has the effect that characters can be reproduced at high speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the character reproducing device of the present invention, FIG. 2 is a diagram explaining the prior art, FIG. 3 is a process flow diagram showing the processing procedure of the present invention, and FIGS. FIG. 8 is a diagram illustrating character reproduction according to the present invention. 11... Contour reproduction section 12... Judgment section 13... Bitmap memory 14... Memory control section

Claims (2)

[Claims] (1) In a character reproduction device that reproduces characters to be output from compressed character data to a specified area of an output section such as a display section, the coordinate values (Xi, Yi) of the outline point Pi of the character on the output section are determined from the compressed character data. and the coordinate values (Xi, Yi) of the contour point Pi reproduced by the contour reproduction section,
Specified area of the output section {(Xs, Ys) ~ (Xe, Ye
)} and determines the coordinate values on the bitmap memory based on the determination result, and the contour point reproduced by the contour reproduction unit at the coordinate value determined by the determination unit A bitmap memory for character reproduction that bit-expands Pi; and a contour point Pi bit-expanded in the bitmap memory.
A character reproducing device comprising: a memory control unit that performs processing such as filling based on; (2) When the coordinate values (Xi, Yi) of the contour point Pi on the output part are Ys≦Yi≦Ye and Xs≦Xi≦Xe, the determination unit determines that Xbi=Xi−Xs Ybi=Yi− If Ys≦Yi≦Ye and Xi<Xs, then Xbi=0 Ybi=Yi−Ys If Ys≦Yi≦Ye and Xs<Xi, then Xbi=Xe−Xs 2. The character reproducing device according to claim 1, wherein the values Ybi=Yi−Ys are used as the coordinate values (Xbi, Ybi) of the contour point Pi on the bitmap memory.