JPS62278683A - Plural window picture display controlling system - Google Patents

Abstract

PURPOSE:To form a plural window screen display function without using a large quantity of memories, by providing a picture priority table for storing the migration origin position information of a window memory, the transferring destination position information on a video memory, and the superposition priority rank of the window memory. CONSTITUTION:Transferring origin position information a1-n1 of picture memories 1a-1n and transferring destination position information a2-n2, which are stored in a picture priority table 2 consist of, for instance, the head address and the final address of a rectangular area on the window memories 1a-1n and on the video memory 4. As for the picture priority table 2, at the time point of the windows 1a-1n are generated or deleted on the picture and at the time point of how to superpose a screen is changed, etc., the transferring origin position information a1-n1 of the windows 1a-1n, the transferring destination position information a2-n2 on the video memory 4, and superposition priority ranks a3-n3 of the window memories 1a-1n are updated.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a multi-window screen display control method in an information processing device such as a personal computer or a terminal device, and particularly relates to a multi-window screen display control method in an information processing device such as a personal computer or a terminal device. The present invention relates to a multi-window screen display control method that realizes a multi-window screen display function by selectively transferring the contents of one window memory to one video memory.

(Prior art) Conventionally, in this type of multiple window screen display control method,
When selectively transferring the contents of the window memory of a plurality of windows to the video memory, the occupied state of the window memory on the video memory, which is the current display screen, is stored in another memory for each focus, Based on the stored contents, display data is transferred by determining source position information on the window memory, destination position information on the video memory, superimposition priority order of the window memory, and the like.

[Problem that the invention seeks to solve]

In the conventional multiple window screen display control method described above, when display data is selectively transferred from multiple window memories to one video memory, the occupation state of the window memory on the video memory that is the current display screen is individually controlled. This method stores data bit by bit and determines the source position information on the window memory, the destination position information on the video memory, the superimposition priority of the window memory, etc. based on the stored contents. This method has disadvantages in that a large amount of memory, which is larger than the video memory, is required to store the occupied state of the window memory, and the processing time for displaying multiple window screens increases.

In view of the above points, it is an object of the present invention to store the occupied state of the window memory on the video memory that is the current display screen when display data is selectively transferred from a plurality of window memories to one video memory. The purpose of the present invention is to provide a multiple window screen display control method that eliminates the need for multiple window screen display control.

[Means for solving problems]

The multi-window screen display control method of the present invention includes a video memory that stores display data in a format that can actually be seen on the screen, a plurality of window memories that store display data of windows that are virtual display screens, and a plurality of a screen priority table that stores transfer source position information of the window memory, transfer destination position information on the video memory, and superimposition priority of the window memory for each window memory when a window superimposed screen is displayed; Transferring the display data from each window memory to the video memory based on transfer source position information of the window memory stored in a screen priority table, transfer destination position information on the video memory, and superimposition priority of the window memory. It has a means for transporting.

[Effect]

In the multi-window screen display control method of the present invention, when displaying a superimposed screen of multiple windows, the transfer means transfers the source position information of the window memory stored in the screen priority table, the destination position information of the video memory and the window Multi-window screen display functionality is achieved by selectively transferring display data from each window memory to the video memory based on memory overlapping priorities.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.

The multiple window screen display control method of this embodiment uses multiple window memories 12 to 1n and each window memory 1.
Transfer source position information a, "-n, (see FIG. 2) of window memories 1a to 1n corresponding to a to 1n, transfer destination position information a2 to nl on video memory 4 (see FIG. 2), and window memory 13 ~In polymerization priority order a, ~n
3 (see FIG. 2) and the transfer source position information fl of the window memories la to 1n stored in this screen priority table 2.
at~nI, transfer destination position information a2~ on video memory 4
a transfer circuit 3 for selectively transferring display data from the window memories 1a to 1n to the video memory 4 based on the superimposition priorities a, -n of the window memories 1a to 1n; The video memory 4 stores display data.

Transfer source position information a of the window memories 1a to In stored in the screen priority table 2.

~n1 and transfer destination 1 information a2 on video memory 4~
n2 is, for example, the start address and end address of a rectangular area on the window memories 13 to In and the video memory 4. .

Screen priority table 2 stores window memory la at the time when windows 13 to 1n are created or deleted on the screen, when the way the screens overlap is changed, etc.
Transfer source position information a1 to nI of ~1n, transfer destination position information at to n2 on video memory 4, and window memory 1
The superimposition priorities a, to n, of a to 1n are updated.

Next, the operation of the multi-window screen display control system of this embodiment configured as described above will be explained.

When creating or deleting a window on the screen or changing the way windows overlap, etc., first the transfer source position information a, -nI of the window memories 1a to 1n in the screen priority table 2 and the transfer destination position in the video memory 4 are Information 3
The superposition priorities a□-n of window memories 13-1n and window memories 13-1n are updated.

Next, the transfer circuit 3 transports a plurality of window memories la to 1.
At the time when display data should be transferred from video memory 1 to video memory 1, the transfer source position information a, -n1 of window memories 1a to 1n is obtained from screen priority table 2, the transfer source is determined, and then the transfer source is determined. The transfer destination is determined by obtaining the transfer destination position information a2 to n2, and the superimposition priorities a, to n of the window memories 13 to 1n are obtained, and the contents of the window memories 1a to 1n are transferred to the video memory 4 in this order. Transfer selectively.

As a result, the screen of the next window is displayed in a partially sequentially superimposed state on the screen of the previously transferred window, thereby performing multi-window screen display.

〔Effect of the invention〕

As explained above, the present invention provides a screen priority table that stores the source position information of the window memory, the destination position information of the video memory, and the superimposition priority order of the window memory, so that the window memory on the video memory Display data can be selectively transferred from a plurality of window memories to one video memory without storing the occupancy state of the video memory, and a multi-window screen display function can be realized without using a large amount of memory.

Further, there is no need for processing time for storing the occupied state of window memory on the video memory, and there is an effect that the processing time for displaying multiple window screens can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
It is a figure which shows the content of the screen priority table shown in the figure. In the figure, 1aNin window memory, 2... Screen priority table, 3...
・Transfer circuit, 4...Video memory, a, to n, ・Transfer source position information, a2 to n2 ・Transfer destination position information, a3 to n, ・Superposition priority order.

Claims (1)

[Claims] A video memory that stores display data in a format that can actually be seen on a screen, a plurality of window memories that store display data of windows that are virtual display screens, and a superimposed screen of a plurality of windows. a screen priority table that stores transfer source position information of the window memory, transfer destination position information on the video memory, and superimposition priority of the window memory for each window memory at the time of display; transfer means for transferring the display data from each window memory to the video memory based on transfer source position information of the window memory, transfer destination position information on the video memory, and superimposition priority of the window memory; A multi-window screen display control method comprising: