JPS62210535A - Area display control system - Google Patents

Abstract

PURPOSE:To reduce the load of a processor and improve the responsiveness by displaying an area automatically by only indication of area coordinates. CONSTITUTION:In case of area display, X and Y coordinates on a picture of both ends of a diagonal line of a rectangular area are set to a pair of area display registers 20a and 21a or a pair of area display registers 20b and 21b. Comparator arrays 22a and 22b compare coordinate values of registers 20a and 21a or registers 20b and 21b with the coordinate value of a scanning counter 23 to generate area signals and frame signals indicating that the coordinate value of the scanning counter 23 is on the inside or the outside of the designated area. Signals generated by comparator arrays 22a and 22b, signals indicating display contents of a background part and the area, and a display mode designating signal are inputted to a display signal generating part 25, and this part 25 generates and outputs a display signal.

Description

[Detailed Description of the Invention] [Summary] A control method for displaying one or more rectangular frame areas on a scanning display device so as to represent sections for displaying different processes, etc. A circuit is provided for each area to output a signal indicating that the scanning point is on the frame line and within the area by comparing the coordinates of both ends of the diagonal line of the area designation with the coordinates of the scanning point. With reference to these signals, a display method for signals indicating display contents is determined, and a display signal to be displayed on the screen is generated. With the above mechanism, clear partition display is automatically performed simply by specifying area coordinates, reducing the control load and speeding up the overall display processing.

[Industrial application field]

The present invention relates to a control method for displaying one or more rectangular frame areas on a scanning display device so as to represent sections for displaying different processes, etc.

A system called a so-called video display terminal, in which commands and data are input from a keyboard or the like while viewing the output on a display device, has become widely used to proceed with information processing.

Furthermore, in this format, it is required to perform multiple types of processing in parallel or view data from multiple different files at the same time, in which case it is necessary to divide the screen so that multiple different data can be viewed easily. It is necessary to display the

[Conventional technology]

FIG. 4 is a block diagram showing an example of the configuration of a computer system.

The processing device 10 is connected to an input device 3!11 such as a keyboard and a display device 12, and displays processing results based on information input from the input device 11 on the display device 12.

The display device 12 has a control section 13 and a display section 14, and the control section 13 exchanges information with the processing device 10, holds information indicating display contents, and displays the information on the display section 14.

The display unit 14 is, for example, a CRT display, and is configured to constantly scan all display points on the display screen and display information according to information held by the control unit 13 at each scanned point.

As a display format when a plurality of types of data are displayed on one screen as described above, a format as shown in FIG. 5, for example, is often used.

Screen 1 in the figure is the screen of the display unit 14, and there is first data displayed in the background area 2, which is a part of the entire screen,
Cut out area 3 surrounded by a rectangular frame within it, and
An example is shown in which data is displayed and third data is displayed in a separately cut out area 4.

When performing such a display, each area 3.4 is bordered with a frame line of an appropriate display color, and if necessary, the background area 2, area 3,
The division of various data on the screen is made clear by making the background of area 4 a different color or filling it with a different pattern.

Such a display will hereinafter be referred to as a region display.

[Problem that the invention seeks to solve]

In order to display the area as described above, conventionally, a well-known graphic display function is used to store graphic information corresponding to the screen in the display device 12 in a memory called a so-called graph ink brain or the like, for example, as shown in FIG. The graphic pattern corresponding to the screen is stored and displayed.

The graphic pattern stored in the graph ink brain in this way is processed by a program executed by the processing device 10, as in the case of output of general graphic processing, and the resulting graphic pattern is displayed on the display device by the program. 12 and is obtained by passing it to the control unit 13 of 12 and writing it to the graphic brain there.

Therefore, when displaying the area, an extra load is placed on the processing device 10. In particular, when displaying as in the example of FIG. 5 and erasing the display of area 4, the display of parts 5 and 6 that were hidden by area 4 can be
Each must be played back and displayed, which requires relatively complicated processing.

As a result of the above, problems arise, such as the speed of area display becoming slow and the responsiveness of the processing device in its original business processing being impaired.

[Means for solving problems]

FIG. 1 is a block diagram showing the configuration of the present invention.

The figure shows the configuration of an area display mechanism added to a display device, in which 20a, 21a, 20b, and 21b are area coordinate registers, and 2'2a and 22b generate signals indicating each area in synchronization with screen scanning signals. A comparator array 25 is a display signal generation unit that generates a signal to be displayed on the screen based on the output signals of the comparator arrays 22a and 22b.

[For production]

FIG. 1 shows an example of a configuration in which up to two areas are to be displayed, and when the number of areas exceeds two, 20a, 21
It is assumed that a configuration consisting of a region register a and a comparator array 22a is connected according to the number of regions.

The area display mechanism shown in FIG. 1 is connected to be inserted between the control section 13 and the display section 14 in the display section M12 of FIG. 4.

When displaying an area, register the area display register 20a in advance.
, 21a, or the pair 20b, 21b, the X and Y coordinates on the screen indicating both ends of the diagonal of the rectangular area are set.

The comparator arrays 22a, 22b are 20a, 20a, respectively.
21a or zob, 2tb coordinate values and scanning counter 2
3 to generate an area signal indicating whether the coordinate value of the scanning counter 23 is inside or outside each specified area, and a frame signal indicating whether it is on the frame line of the area periphery.

The scanning counter 23 is a counter with a known configuration that sequentially generates the X and Y coordinate values of all display points at a predetermined period so as to constantly scan all display points on the screen.

The display signal generation section 25 includes comparator arrays 22a and 22b.
A display signal is generated and output manually using the generated signal, a signal indicating the display contents of the background portion and each area, and a display mode designation signal.

The display modes include an overlap display mode in which all of the overlapping areas are displayed in a mixed manner, and a priority display mode in which the display of a specified area is gained or lost.

By providing the area display mechanism with the above configuration, area display will be performed automatically by simply specifying the coordinates of the area from the processing device, reducing the load on the processing device and improving responsiveness. can be speeded up.

〔Example〕

FIG. 2 is a block diagram showing an example of the configuration of comparator arrays 22a and 22b.

In the figure, among the input signals from the area coordinate registers 20a to 21b, the coordinate values of the area coordinate register 20a or 20b are inputted from the scanning counter 23. The coordinate value is expressed as XcountYCOIIIL.

Also, if the screen coordinates take values that increase from left to right and top to bottom, then the coordinates of the upper left corner of the area are (X,
, Yυ, and the coordinates of the lower right corner are designated as (X,, Yt).

Comparators 30, 31, 32, and 33 have terminals i, .
Compare the two human power values of i2, and if they are equal, output terminal 0. Set the signal to °1゛. Also, i, input 512
When using human power, output terminal o2 is set to signal ``1''.

By those four sets of comparators 30 to 33, l frI
Each of the four coordinate values specifying the area is compared with the X or Y coordinate value of the scanning counter 23, and a logical operation is performed on the output of the comparison results.

As a result, as is clear from the illustrated logic circuit connection, the area signal line 34 receives a signal ``1'' when the coordinate value of the scan counter 23, that is, the display point being scanned is a point within the specified area.゛ is output. Further, the frame signal line 35 receives a signal +11 when the scanning display point is on the frame line of the periphery of the specified area.
become.

FIG. 3 is a block diagram showing an example of the configuration of the display signal generation section 25. As shown in FIG.

The display signal generation section 25 includes each comparator array 22a and 2
The area signal line 34 and frame signal line 35 of the output of 2b are connected.
, 35b).

Further, a display mode designation line 40 and display content signal lines 41, 42a and 42b are connected from the control unit 13.

The display mode designation line 40 is set to a signal "1" when the display mode is set to the priority display mode, and is set to a signal "0" when the display mode is the overlap display mode.

A background display signal in the priority display mode or a full screen display signal in the overlap display mode is sent to the display content signal line 41 in synchronization with screen scanning.

In the case of the priority display mode, at the same timing, the area register 20a,
Display signal of the area designated by 21a, display content signal line 4
A display signal for the area designated by the area registers 20b and 21b is sent to the area register 2b.

In the case of the overlap display mode, the switch 36 outputs the output signal of the mixer 37 to the display section 14 from the display signal 'a43 as a display signal in response to the signal 0' on the display mode designation line 40.

The mixer 37 connects frame signal lines 35a and 35 of each comparator array.
b and the display content signal line 41, and when the frame signal is "1", the frame line is displayed on the screen by outputting a video signal with a predetermined color display, and when the frame signal is "0", the frame line is displayed on the screen. In this case, the signal on the display content signal line 41 is output.

Therefore, in the overlap display mode, the frame lines of all designated areas are displayed in the display based on the display signal of the display content signal line 41.

In the case of the priority display mode, the switch 36 outputs the output signal of the selector 38 to the display unit 14 as a display signal in response to the signal °1° of the display mode designation line 40.

The selector 38 selectively selects one of the display signals of the foreground, A area, and BN area according to the signal from the priority signal generator 39 and outputs the selected display signal as a display signal.
is the background part, from the signals of the area signal lines 34a and 34b.
The device is configured to generate a signal specifying which of the area B and the area B is to be selected.

When it is set to give priority to area A, for example, the priority signal generator 39 outputs ``0'' to select the background part when the area signal lines 34a and 34b are both 0''. Occurred, both 1゛ and territory.

When the area signal line 34a is ``1'', a signal ``1'' is generated to select area A, and only when the area signal line 34b is 1'', a signal ``2'' is generated to select area B.

The selector 38 receives the signal generated by the priority signal generator 38 and passes the display signal of the background portion of the display content signal line 41 to the switch 36 when the selection signal is "0".

When the selection signal is "1" or "2", select the pair of display content signal line 42a and frame signal line 35a or the pair of display content signal line 42b and frame signal line 35b, respectively, and select either one of them. The display signal in the area is passed to the switch 36.

Note that the frame signal line 35a or 35b of the selected area is “
1'', as in the case of the mixer 37, control is performed to output a display signal of a predetermined color for displaying a frame line, regardless of the display content signal lines 42a and 42b.

With the above control, in the priority display mode, areas A and B are displayed cut out from the background, and areas A and B are displayed.
Area A will be displayed where these overlap.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a computer system having a display device that divides a display screen into a plurality of areas and displays different types of data, it is possible to automatically Since the area is displayed in
This has significant industrial effects in that it reduces the load on processing equipment, improves responsiveness, and speeds up display.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention, FIG. 2 is a block diagram of one configuration example of a comparator array, FIG. 3 is a block diagram of one configuration example of the display signal generation section, and FIG. 4 is a block diagram of one configuration example of the computer system. A block diagram of a configuration example, FIG. 5 is an explanatory diagram of a display screen. In the figure, 10 is a processing device, 11 is an input device, 12 is a display device, 13 is a control unit, 14 is a display unit, 20a, 20b, 21a, 21b are area coordinate registers,
22a and 22b are comparator arrays, 23 is a scanning counter, 25 is a display signal generator, 30
33 is a comparator, 34. 34a, 34b are area signal lines, 35. 35a, 35b are frame signal lines, 36 is a switch, 37 is a mixer, 38 is a selector, 39 is a priority signal generator, 41. 42a and 42b are display content signal lines. FIG. 1 is a block diagram showing the configuration of the present invention. FIG. 2 is a block diagram showing an example of the configuration of a comparator array.

Claims (1)

[Claims] Displaying one or more rectangular areas on the display screen of a scanning display device that periodically and sequentially scans all display points on the display screen and displays the scanned display points based on a display signal. When doing so, registers (20a, 20b, 21a, 21b) holding the coordinates indicating both ends of one diagonal line of the area, and the register (20a, 20b, 21a, 21b)
20a, 20b, 21a, 21b) and a frame signal indicating that the screen scanning point is on the peripheral frame line of the area by comparing the coordinate values held in the display points 20a, 20b, 21a, 21b) with the coordinate values of the sequentially scanned display points; and a comparator array (22a, 22b) that generates an area signal indicating that the area is within the area, and a comparator array (22a, 22b) that generates an area signal indicating that the area is within the area. An area display control system characterized in that the display signal is generated based on a signal and an area signal (25).