JPS63276091A - Scrolling system for multi-window - 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 [Summary] At least a plurality of image memories (1 to n), a refresh buffer, and a window information memory are provided, and based on the window information of the window information memory, the plurality of In a display device that performs multi-window display by developing window data in an image memory (1=n) into a refresh buffer, the window information memory stores scroll information for a scrolling window and a display area of the scrolling viewport. By adding division information when dividing into a plurality of rectangular areas in the scroll direction, data in the visible portion is transferred within the refresh buffer based on the window information, scroll information, and one division information. , only the data of the part newly displayed by the scrolling is read out from the corresponding image memory and written into the rectangular part that has become blank by the scrolling.

[Industrial application field]

The present invention provides at least a plurality of image memories (1 to n)
, a refresh buffer, and a window information memory, and based on the window information in the window information memory, the window data in the plurality of image memories (1 to n) is developed into the refresh buffer to display a multi-window display. The present invention relates to a scrolling method in a display device.

Due to recent improvements in the performance of computer systems, even relatively small computer systems such as workstations (WS) can display 9-character images, etc., and system design using computer-aided design (CAD).

Circuit design etc. have started to be carried out.

In this case, in order to improve the man-machine interface (MMI), a multi-window method has been used to display multiple pieces of image data, documents, etc. at the same time and perform efficient data processing. With the increase in processing volume and diversification, the number of windows is also increasing, and even when scrolling windows with low display priority, the speed of scrolling is increasing due to the improvement of the human-machine interface. has become necessary.

[Problems to be solved by conventional technology and invention] Part 3
The figure is a diagram showing an example of the configuration of a general multi-window display device, and FIG. 4 is a diagram illustrating a conventional scrolling method.

First, a general multi-window display method will be explained with reference to FIG.

The control unit 2 reads the image data of each window area from the plurality of image memories (1 to n) 1 based on the window information of the window information memory 3, and reads the image data of each window area 41 of the refresh buffer 4.
Then, the expansion 1 is synthesized while overlapping according to the priority order to form one screen, and is displayed on the display (CRT) 5 to realize a multi-window display. (Figure 4 (
(See a)) In such a display device, when scrolling one window (for example, window ■) upward by dy, as shown in FIG. 4(b),
As shown in (C), the area ((b)
After reading the window data of the area indicated by the solid line in the figure) from the image memory (3) 1 and developing it in the corresponding viewport area ■ of the refresh buffer 4, the window data of the high priority windows ■ and ■ shown in FIG. As shown in d) and (e), the same window data is read from the image memories (2) and (1), respectively, and redeployed to the corresponding viewport areas ■ and ■ of the refresh buffer 4 to replay one screen. It needed to be configured and displayed.

In view of the above-mentioned conventional drawbacks, the present invention focuses on the fact that, depending on the amount of scrolling, some image data stays in the refresh buffer when displaying a window with a scroll, and minimizes the amount of data that needs to be rewritten in the refresh buffer. The purpose of this invention is to provide a method for reducing scrolling time.

[Means for solving problems]

FIG. 1 is a diagram showing the concept of the structure of the scrolling method of the present invention.

In the present invention, At least a plurality of image memories (1=n)1.

Refresh buffer 4 and window information memory 3
Based on the window information of the window information memory 3, the plurality of image memories (1 to n) 1
In a display device that performs multi-window display by expanding window data in a refresh buffer 4, the window information regarding a specific window includes scroll information and a plurality of rectangles (a+t) in the scroll direction of the display area of the window. +C), and based on the above window information, scroll information, and 1 division information, each of the above divided rectangles (a, b,
c) Regarding the area, the display data of the visible part is transferred in the refresh buffer 4 by the amount of scrolling, and only the data of the part newly displayed by scrolling is read from the image memory 1, and the display data of the above-mentioned part of the refresh buffer 4 is The configuration is such that writing is performed in the portion of the rectangular (a, b, c) area that has become blank due to the above transfer operation.

[Effect]

That is, according to the present invention, at least a plurality of image memories (1 to n) and a refresh buffer.

a window information memory, and performs multi-window display by expanding window data in the plurality of image memories (1 to n) into a refresh buffer based on window information in the window information memory, By adding scroll information for a scrolling window and division information when the display area of the scrolling viewport is divided into a plurality of rectangular areas in the scroll direction to the window information memory, the window information and Based on the scroll information and the 9-division information, the data of the visible part is transferred in the refresh buffer, and only the data of the part newly displayed by the scroll is read from the corresponding image memory, and the data of the part that becomes blank by the scroll is read out from the corresponding image memory. Since it is designed to write in a rectangular area, by using the dividing method depending on the vertical or horizontal direction, the process becomes simple and the data transfer from the image memory when scrolling is minimized. This has the effect of reducing scrolling time.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

The above-mentioned FIG. 1 is a diagram showing the concept of the configuration of the scrolling method of the present invention, and FIG. 2 is a diagram showing an embodiment of the present invention in a block diagram. (Start point and end point coordinates of each rectangle) 33 are added to the window information memory 3, and the window information 31 and scroll information (direction) are added to the window information memory 3.

The scroll amount) 32 and the means 4a for scrolling based on the division information 33 are necessary means for carrying out the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

Hereinafter, the scrolling method in a multi-window according to the present invention will be explained with reference to FIGS. 1 and 2.

In the present invention, as shown in FIG. 1, window information 3 such as the start point and end point coordinates of each window
1 as well as division information for the window to be scrolled (starting points of each rectangle a, b, c).

end point coordinates) 33, scroll information (scroll direction,
Scroll amount) 32 is added to the window information memory 3. (See Figure 1 (d)) There are two division methods: vertically and horizontally. Based on this division information 33 and scroll information 32, the control unit 2 controls reading of window data from the image memory (3) 1 and data transfer in the refresh buffer 4 to perform scrolling.

1) In the case of vertical scrolling: (See FIG. 1 (b)) For vertical scrolling, division information is used that vertically divides the visible area of window ■.

Regarding the divided areas a, b, and c, data is transferred in the vertical direction by the amount of scrolling in the visible parts within the refresh buffer 4.

To explain specifically, (b) Regarding area a in the figure,
The part a is transferred to 82. Data transfer within the refresh buffer 3 is performed in the same manner for areas b and c.

Finally, the scroll refreshes the data (d, ~d) read from the image memory (3)l.
By writing c), the series of scroll processing is completed.

2) In the case of horizontal scrolling: (See Figure 1 (c)) In the same way as (■), change the window (■) to a rectangle aI.

The image is divided horizontally as shown by b' and c'', and the division information is used.

After scrolling the visible parts of the rectangular areas 1, bl, and CI in the refresh buffer,
Image data to be newly displayed (d-', db', dc
') from the image memory (3) 1 and writes it into the blank space created by the scrolling, thereby completing the horizontal scrolling process.

In this way, the present invention focuses on the fact that most of the data in the viewport that you want to scroll in the refresh buffer remains in the refresh buffer, and converts most of the image data into high-speed data in the refresh buffer. The feature is that the scrolling is completed by reading and writing from the image memory (1 to n) 1 only for the blank area generated by the scrolling.

Note that the data transfer means within the refresh buffer 3 described above is, for example, provided with a data register for one word.
This may be achieved by repeating read and write operations between the data register and the refresh buffer at high speed, or the refresh buffer may be configured with a shift register that can be shifted vertically and horizontally, and the shift operation Data may be transferred in the required direction.

〔Effect of the invention〕

As described in detail above, the multi-window scrolling method of the present invention includes at least a plurality of image memories (1 to n), a refresh buffer, and a window information memory, and Based on the information, the plurality of image memories (
In a display device that performs multi-window display by expanding window data within 1=n) into a refresh buffer, the window information memory stores scroll information for the scrolling window and the display area of the scrolling viewboard in the scrolling direction. , and division information when divided into multiple rectangular areas, the window information, scroll information, and 1
Based on the division information, the data of the visible part is transferred within the refresh buffer, and only the data of the part newly displayed by the scroll is read from the corresponding image memory and written to the rectangular part made blank by the scroll. Therefore, by using the dividing method depending on the vertical or horizontal direction, the process becomes simple and the data transfer from the image memory during scrolling can be minimized. This has the effect of reducing scrolling time.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the concept of the structure of the scrolling method of the present invention. FIG. 2 is a block diagram showing an embodiment of the present invention. FIG. 3 is a diagram showing an example of the configuration of a general multi-window display device. FIG. 4 is a diagram explaining a conventional scrolling method. It is. In the drawings, 1 is an image memory (1 to n), and 2 is a control unit. 3 is window information memory. 31 is window information, and 32 is scroll information. 33 is division information. 4 is a refresh buffer. 5 is a display (CRT). ■, ■, ■ are windows. a, b, c, or aI, bl, cl are divided areas. dlllldbldcl and d, 1dbldcI are write data. are shown respectively.

Claims (1)

[Claims] At least a plurality of image memories (1 to n) (1);
It is equipped with a refresh buffer (4) and a window information memory (3), and based on the window information in the window information memory (3), the plurality of image memories (1 to 3) are
n) In a display device that performs multi-window display by expanding the window data in (1) into the refresh buffer (4), the window information regarding a specific window includes scroll information and the display area of the window in the scrolling direction. The division information for dividing into a plurality of rectangles (a, b, c) is added, and each of the divided rectangles (a, b, c) is added based on the window information, scroll information, and division information.
c) Regarding the area, the display data of the visible part is transferred in the refresh buffer (4) by the amount of scrolling, and only the data of the part newly displayed by scrolling is read from the image memory (1) and refreshed. A scrolling method in a multi-window characterized in that writing is performed in a portion of the rectangular area (a, b, c) of the buffer (4) that becomes blank due to the transfer operation.