JPS63106078A - Display method for character string echo of graphic processor - Google Patents

Abstract

PURPOSE:To attain 2<n> color character string echo display without increasing a frame memory by using the frame memory in a graphic display without providing the frame memory only for the character string echo display. CONSTITUTION:A graphic input and output control means 21 may execute an input from a keyboard 7 according to the instruction of an applied program 1, clears an area on the frame memory corresponding to an echo area on a surface through an area erasing means 22 and displays in initial character string by the designated size and color or the like by an echo display means 23. Every time when one character is inputted from the keyboard 7, the graphic input and output control means 21 receives a character code through a keyboard interface 3, and after an area to display the character as an echo is erased by the area erasing means 22, the character inputted by the echo display means 23 is displayed as the echo.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an echo display method for character string input among graphic inputs used in computer graphics systems.

The echo display refers to a display to the operator in order to confirm the character string input by the operator.

〔overview〕

The present invention provides a character string echo display method for a graphic processing device that visually displays a 2n color graphic using n frame memories, without providing a dedicated frame memory for character string echo display.
By using the frame memory in the graphic display, it is possible to realize a 2" color string echo display without increasing the frame memory.

[Conventional technology]

In the conventional method, in addition to multiple frame memories for normal figure display, one or more frame memories are prepared for echo display or console display, and inputs such as character strings are echo-displayed. Ta.

[Problem that the invention seeks to solve]

In such a conventional echo display method, even if n frame memories are prepared, at least one of them is used for echo display, etc., so the maximum number of frame memories that can be used for actual graphic display is n-1. Although it has n frame memories, it has the drawback that the graphic display colors are limited to a maximum of 2M-1 colors.

SUMMARY OF THE INVENTION The present invention aims to eliminate such drawbacks and to provide a character string echo display method for a graphic processing device in which the graphic display color is not limited to echo display.

[Means for solving problems]

The present invention is based on information on n frame memories.
In a character string echo display method for a graphic processing device having a program for generating color pattern information and a display means for visually displaying this pattern information, a character string echo is displayed in a specific area of the display means using the above program. It is characterized by

[Effect]

Clears the echo display area on the graphic display screen specified by the application program when character string input becomes possible. Every time the operator inputs a character from a device that accepts character string input from the operator, such as a keyboard, the area corresponding to that character is cleared, and the newly input character in that area is cleared to the size specified by the application program. Display by color, etc.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block configuration diagram showing the configuration of an embodiment of the present invention. Referring to FIG. 1, this embodiment is comprised of an application program 1, a graphic processing system 2, a keyboard interface 3, a frame memory 4, a CRT interface 5, a CRT 6, and a keyboard 7. , the graphic processing system 2 includes a graphic input/output control means 2n, an area erasing means 22, and an echo display means 23.

Next, the operation of this embodiment will be explained based on FIGS. 1 and 2. The application program 1 outputs instructions to the graphic processing system 2 for displaying graphics on the CRT 6, inputting data from the keyboard 7, and the like. The graphic input/output control means 2n writes data for displaying a graphic on the CRT 6 into the frame memory 4 according to instructions from the application program 1, and transfers the contents of the frame memory 4 to the CRT via the CRT interface 5.
Graphically displayed in 6. Further, the graphic input/output control means 2n enables input from the keyboard 7 according to instructions from the application program 1, and as shown in FIG. The corresponding area on the frame memory is cleared, and the echo display means 23 displays the initial character string in a specified size, color, etc., as shown in FIG. 2 (2). Every time a character is input from the keyboard 7, the graphic input/output control means 2n receives the character code via the keyboard interface 3, and the area erasing means 22 erases the area in which the character should be displayed as an echo, as shown in FIG. After erasing as shown in (3), the echo display means 23 displays the input characters as an echo as shown in FIG. 2 (4). The input characters are similarly displayed as an echo until an input completion notification is received (for example, until the RETURN key is pressed), and at the time of completion, the graphic input/output control means 2n returns the character string input to the application program 1. . Further, when the input enabled state ends, the echo area is cleared by the area erasing means 22.

Figure 2 (1) shows the screen where character string input is enabled and the echo area figure has been erased, Figure 2 (2) shows the screen with the initial character string displayed on it, and Figure 2 (3) ) schematically shows a screen where a character is input from the keyboard and the figure in the area where the character should be displayed is erased, and FIG. 2 (4) schematically shows a screen where the input character is displayed.

〔Effect of the invention〕

As explained above, the present invention uses the frame memory for displaying figures for echo display of character strings, so all frame memories can be effectively used for displaying figures, reducing the number of frame memories. If n is set, graphic display using 2'' colors becomes possible, and the same number of colors can also be used for echo display.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a schematic diagram showing the actual echo display situation. 1... Application program, 2... Graphic processing system,
3...Keyboard interface, 4...Frame memory, 5...CRT interface, 6...CR
T. 7...Keyboard, 2n...Graphic input/output control means,
22... Area erasing means, 23... Echo display means.

Claims (1)

[Claims] (1) In a character string echo display method for a graphic processing apparatus having a program for generating pattern information of 2^n colors based on information on n frame memories and a display means for visually displaying this pattern information, the display means A method for displaying a character string echo in a graphic processing device using the above program in a specific area of the graphic processing device.