JPS63115226A - Control system for display picture - Google Patents

Abstract

PURPOSE:To set a display area in a desired shape by displaying picture information in accordance with OR in a form of bit information between display area information and picture information stored in first and second storage means. CONSTITUTION:A picture image 31 is inputted from a keyboard 4 and is developed in an image memory 6. An area is inputted with a mouse 11 or the like, and the inputted area is set as the mouse area to develop a window form 32-1 to be masked in an image mask memory 7. An image memory controller 8 operates OR between optional bit information on the memory 6 and that on the memory 7 corresponding to said bit information and develops results in a corresponding position on a video RAM9 as bit information. '0' is stored in the RAM9 as bit information of an area 33-1, and image information is masked and is not displayed in this area, and consequently, image information in an area 33-2 is displayed on a display device 3 as shown in a figure 33.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling a display screen in a display device used for a personal computer, a workstation, an electronic file, or the like.

[Prior Art] Computers and image processing devices generally have a display device (CRT display device) using, for example, a cathode tube, and the input/output results of the computer or image processing device are displayed on the CRT display device. .

Conventionally, in this type of CRT display system, a display area (window) on the front screen of a CRT display device is set in advance, and the display area has a rectangular shape.

[Problems to be Solved by the Invention] However, in conventional window control systems of this type, the size of the screen window is set in advance and the shape is square, and it is difficult to set it to the shape desired by the operator. The problem was that it couldn't be done.

Therefore, the purpose of the present invention is to solve such problems,
An object of the present invention is to provide a display screen control method that allows an operator to set a window in a desired form.

[Means for Solving the Problems] In order to achieve such objects, the present invention provides a display means for displaying image information in the form of dots, and an input means for inputting data indicating a display area of the display means. , a first storage means for storing input display area data as bit information corresponding to the display position of the dot, and a second storage means for storing the image information as dot information corresponding to the display position of the dot. , extraction means for extracting bit information to be displayed based on the bit information stored in the first storage means and the bit information stored in the second storage means, and displaying the image information extracted by the extraction means The present invention is characterized by comprising a display control means for controlling display on the means.

[Function] The present invention stores the display area information input by the operator in the first storage means, and stores the display area information stored in the first storage means and the image stored in the second storage means. Since the above-mentioned image information is displayed according to the logical sum in the form of bit information by the calculation means, the display area can be set in a desired shape.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of a configuration in an embodiment of the present invention.

That is, in FIG. 1, 1 is a central processing unit (CPU) that controls the entire component equipment.

2 is a main memory that stores control procedures executed by the old CP. 3 is an input device using a board and a mouse for displaying image information and text information. A controller 5 outputs image information stored in the video RAM 9 to the cRT display device 3. An image memory 6 stores display information input from the input device 4 as dot information corresponding to display dots on the CRT display device 3. 7 is an image mask memory, which is a display prohibited area (mask area)
is stored as dot information corresponding to display dots in the CRT display area. This mask area information is, for example, mouse 1
1 may be used to set the area, or may be input as coordinate information from the keyboard 4.

8 is a controller, and the controller 8 extracts image information to be displayed according to the mask information stored in the image mask memory 7 and the image information stored in the image memory 8, and sends it to the video RAM 9.

Next, the operation of the embodiment of the present invention will be explained.

The user inputs an image 31 as shown in FIG. 3 from the keyboard 4 according to a predetermined image creation program, and by visualizing this image, the window type to be masked is also stored in the image mask memory 7. Expand 32-1. Note that since the above-mentioned program is well known, detailed explanation thereof will be omitted. Here, the storage area of the image memory 6 and the storage area of the image mask memory 7 have a one-to-one correspondence, and the storage area of the image mask memory 7 has "°1" as bit information of the window area.
At °° the mask area is set at °0''. It goes without saying that the display area may be set to 0° and the mask area may be set to 1°.

For example, in the image mask 32 (see FIG. 3),
Mask area 32-1 has a pitch of 0°” and window area 3.
2-2 is set to a pitch of 1°.Next, the image memory controller 8 performs a logic calculation between arbitrary bit information on the image memory 6 and bit information on the image mask memory 7 corresponding to this bit. The sum is calculated and the result is developed as bit information at the corresponding position on the video R'A Me.

Incidentally, the image controller 8 executes the above-described logical sum operation on all bits of the image memory 7.

For example, bit information at position (x, y) on image memory 6 and position (x, y) on image mask memory 7 are
x, y) bit information is developed into corresponding bits of the video RAM 9 through an AND circuit within the image controller 8. This operation is performed for all positions (x, y).

The logical OR information of the image information 31 and the mask information 32 stored in the image mask memory 7 is stored in the image memory 6 shown in FIG.
0°' is stored as bit information of 1, and the image information is masked and not displayed in this area. Therefore, as shown in display 33 of FIG.
-2, image information can be displayed on the CR7 display device 3.

The image memory controller 8 in the embodiment of the present invention may be any means that performs a logical sum operation, and may use, for example, an AND circuit.

Note that when the arithmetic processing unit (CPU) 1 reads information from the image memory 6 and the image mask memory 7, the above-mentioned CPU may perform the logical sum operation.

[Effects of the Invention] As explained above, according to the present invention, with a simple configuration, image data can be loaded into the image memory at any time without considering the window type, and at the same time, the window type can be changed at any time. This has the effect of making it possible.

[Brief explanation of the drawing]

FIG. 2 is an explanatory diagram showing the operation of ANDing the data in the image memory 6 and the data in the image mask memory 7 and developing it into the video RAM. In this explanatory diagram showing an example, 1... central processing unit, 2... main memory, 3... CRT display device, 4... keyboard, 5... controller, 6... image memory, 7 ... Image mask memory, 8... Image memory controller, 9... Video RAM. IO...Internal bus, 31...Image image information, 32...Image mask information, 32-1...Mask area, 32-2...Window area, 33...Developed in video RAM image data. An explanatory diagram of v11u on the side of the protrusion of the present invention Fig. 2 An example of display of the merits of the present invention Fig. 3

Claims (1)

[Scope of Claims] 1) Display means for displaying image information in the form of dots; input means for inputting data indicating a display area of the display means; a first storage means that stores the image information as bit information corresponding to the display position of the dot; a second storage means that stores the image information as dot information that corresponds to the display position of the dot; Extracting means for extracting bit information to be displayed based on the bit information and the bit information stored in the second storage means, and controlling the image information extracted by the extracting means to be displayed on the display means. 1. A control method for a display screen, comprising: display control means. 2) In the display screen control method according to claim 1, the extraction means extracts bit information stored in the first storage means and bit information stored in the second storage means. A display screen control method characterized by calculating a logical sum.