JPH11283044A - Method and device for magnifying and displaying circumference of pointed position and medium for recording program for magnifying display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a magnified image in the neighborhood of a position which is pointed by means of a pointing device by saving image data of an area corresponding to a magnifying display range in an image memory into a buffer and writing magnified image data in the area corresponding to the magnifying display range in the image memory. SOLUTION: A magnified cursor display area AGDL1 is displayed by the execution of a magnifying cursor invalidating program F2 with a present mouse cursor position PD1 as a center, the display contents of the are AGDL1 before movement are returned to a state before magnified display by the execution of a cursor movement program F3 and the magnified image is displayed in the magnified cursor display area AGDL2 corresponding to a designated movement destination PD2. A designated character image is displayed by the execution of the plotting program F4 of a character. Then, image data of the area corresponding to the magnifying display range in the image memory is saved into the buffer and magnified image data is written in the area corresponding to the range in the memory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for enlarging (image converting) and displaying a periphery of a pointed position and a medium recording a program for enlarging (converted image) display.

[0002]

2. Description of the Related Art A typical conventional enlarged display technique is a method of displaying an enlarged image in the entire display area in response to an enlargement instruction. According to this method, the entire displayed image is enlarged, so that a part that is not displayed (not visible) occurs. Further, when an instruction is given to a specific icon or button on the enlarged image using a pointing device such as a mouse, two operation procedures for giving an instruction using the mouse after giving the enlargement instruction are required.

In order to enlarge and display an image of a portion that has gone out of the display area and becomes invisible after the enlarged display, an instruction to return to a state before the enlarged display is given once, and then an enlargement instruction is issued or the enlarged display is performed. It is necessary to give a scroll instruction and display it while holding it.

Therefore, this enlargement display method has a problem that two operation procedures are required to give an instruction using a mouse to a display range to be enlarged and displayed, and the operation becomes complicated.

[0005] In addition, after the enlarged display, when an image other than the enlargement target range that is being enlarged and displayed is enlarged and displayed, two images are required.
There is a problem that one procedure is required and the operation becomes complicated. Further, when scrolling with the enlarged display, the operator cannot recognize where the part to be enlarged next is located in the whole, and it is difficult to find the part to be enlarged next by the scroll instruction. There is a problem.

[0006]

DISCLOSURE OF THE INVENTION An object of the present invention is to enable a user to display an enlarged image in the vicinity of a designated position only by designating the enlarged position or part using a pointing device such as a mouse. And

Another object of the present invention is to allow a user to change a position or a portion to be enlarged and displayed by simply moving a cursor or the like.

Another object of the present invention is to make it possible to select whether to utilize the image enlargement function.

The enlarged display method according to the present invention enlarges an image in an enlargement target range including a position designated by a pointing device on a display screen for displaying image data stored in an image memory, and enlarges the image at the designated position. This is a method of displaying in the enlarged display range including the image data. The image data in the area corresponding to the enlarged display range in the image memory is saved in a buffer, and the image data in the area corresponding to the enlarged target range is enlarged at a predetermined magnification. Then, enlarged image data is obtained, and the enlarged image data is written in an area corresponding to the enlarged display range in the image memory.

An enlarged display device according to the present invention enlarges an image in an enlargement target range including a position designated by a pointing device on a display screen for displaying image data stored in an image memory, and enlarges the image at the designated position. Means for displaying the image data in the area corresponding to the enlarged display range in the image memory in a buffer, and the image data in the area corresponding to the enlarged target area at a predetermined magnification. There are provided means for creating enlarged magnified image data and means for writing the magnified image data to an area in the image memory corresponding to the magnified display range.

The present invention further provides a medium on which a program for causing a computer to implement the above-described enlarged display method is recorded. This program is a program for enlarging the image data stored in the image memory on the display screen in the enlargement range including the designated position and displaying the image in the enlarged display range including the designated position. The image data in the area corresponding to the enlarged display range in the memory is saved in a buffer, and the image data in the area corresponding to the enlarged target range is enlarged at a predetermined magnification to obtain enlarged image data. This is a program for controlling a computer to perform an enlarged display process of writing data into an area corresponding to the enlarged display range in the memory.

The pointing device includes a keyboard (arrow keys), a mouse, a touch panel, a light pen,
Joystick, trackball, etc. are included.

If the user indicates a desired position on the display screen with a pointing device, an image of a suitable size around the specified position is enlarged and displayed. The enlarged display range is, of course, a range narrower than the entire display screen (not limited to the entire display screen of the display device, for example, one display screen in a window).

A user can designate a desired position with a pointing device, and give a processing instruction (for example, click a mouse) on the position while looking at an enlarged image displayed near the position. Processing related to the processing instruction and the position is executed.

[0015] Preferably, the center position of the enlargement target range and the enlargement display range is the same as the position designated by the pointing device. Then, the cross-shaped image data indicating the center position is included in the enlarged image data. This makes it very clear where the user wants to point. The center position includes the center of gravity position.

It is preferable that frame image data indicating a boundary of the enlarged display range is included around the enlarged image data. The enlarged display range becomes clear.

If the data (for example, a flag) instructing the enlargement display processing does not instruct the enlargement display processing, a cursor is displayed at a position designated by the pointing device instead of the enlargement display processing. The user can use the normal cursor.

Data (flag) for instructing enlargement display processing
Can be changed by initialization processing or validation / invalidation processing.

An enlargement indicating device is provided, for example, an enlargement display function is assigned to a specific key of a keyboard.

In one embodiment of the present invention, the enlargement display processing is performed in response to an enlargement activation instruction from the enlargement instruction device.

The image data saved in the buffer is returned to the original area in the image memory in response to the enlargement invalidating instruction from the enlargement instruction device. As a result, the enlarged display disappears.

When a new position is designated by the pointing device, the image data saved in the buffer is returned to the original area in the image memory in response to the designation, and the designated new position is enlarged and displayed. Perform processing. Thereby, the enlarged display is performed at the new position.

When characters, figures, and the like are created by a word processing program, a figure (image) processing program, and the like, and are displayed on the display screen, if the displayed characters, figures, and the like fall within the enlargement target range. , Characters, figures, etc., are also enlarged within the enlarged display range.

For this purpose, according to the present invention, in response to the new image data such as characters and figures being provided together with the designated position, the image data saved in the buffer is restored in the image memory. And the newly provided image data is written to the area of the image memory corresponding to the designated position, and then the enlarged display processing is performed.

The present invention can be realized as an operating system or as an application program.

In one embodiment, a video memory is used as the image memory and the operating system of the computer is used.
The system performs enlarged display processing.

In another embodiment, an enlarged display process is performed by using an off-screen buffer as an image memory by an application program executed on an operating system having a display control function using an off-screen buffer. Do.

The image data stored in the video memory according to the present invention is displayed on the display screen in the enlarged display range including the designated position by enlarging the image in the enlargement target range including the designated position. The operating system program includes an instruction to save image data in an area corresponding to the enlarged display range in the video memory to a buffer, an instruction to enlarge image data in an area corresponding to the enlarged target area at a predetermined magnification, And an instruction to write the enlarged image data to an area in the video memory corresponding to the enlarged display range.

The image data stored in the off-screen buffer according to the present invention is enlarged on the display screen to display an image in the enlargement range including the designated position on the enlarged display range including the designated position. The application program includes an instruction to save image data in an area corresponding to the enlarged display range in the off-screen buffer to a buffer, an instruction to enlarge image data in an area corresponding to the enlarged target area at a predetermined magnification, And an instruction to write the enlarged image data to an area in the video memory corresponding to the enlarged display range.

The present invention can be more generally expressed as follows.

The image of the conversion target range including the position specified by the pointing device on the display screen displaying the image data stored in the image memory is image-converted to the converted image display range including the specified position. According to the present invention, there is provided an apparatus for displaying, in a buffer, image data in an area corresponding to the conversion image display range in an image memory, and performing predetermined image conversion on the image data in an area corresponding to the conversion target range. There are provided means for creating the converted image data to be obtained, and means for writing the converted image data to an area in the image memory corresponding to the converted image display range.

A program according to the present invention for converting image data stored in an image memory into an image in a conversion target range including a specified position on a display screen and displaying the converted image in a converted image display range including the specified position. Is stored in a buffer of the image data in the area corresponding to the converted image display range in the image memory, and a predetermined image conversion is performed on the image data in the area corresponding to the conversion target range. Computer-readable recording storing a program for controlling a computer to obtain converted image data and write the converted image data into an area corresponding to the converted image display range in the image memory; Medium.

The image conversion includes enlargement conversion, rotation conversion, color conversion or mosaic conversion of an image.

[0034]

DESCRIPTION OF THE EMBODIMENTS Enlarged Cursor Function FIG. 1 is an example of a screen display of a computer system having an enlarged cursor function. On the screen (indicated by a double rectangle), a character "H" and a horizontally long black oval are displayed.

FIG. 1A shows the screen (GD10) in a state where the enlargement cursor function is invalid. Here, the character "H", black oval, and arrow-shaped cursor image AG
DC1, a cross mark indicating the mouse cursor position PD1 on the screen, and a cursor image centered on the mouse cursor position PD1
A rectangular area AGD1 drawn with a dashed line surrounding AGDC1
(This is called an enlargement target area) (a cross mark indicating the mouse cursor position PD1 and an enlargement target area AGD1).
Are not actually displayed on the screen, but are shown for convenience of explanation).

FIG. 1B shows a screen (GD20) in a state where the enlargement cursor function is effective. Here, similarly to the above-mentioned screen (GD10), a horizontally long black ellipse and an enlargement area A
A rectangular enlarged cursor display area AGDL1 where the enlarged image of GD1 is displayed, and a position PD1 of the mouse cursor on the screen
Is shown.

As described above, when the enlarged cursor function is activated, the image around the mouse cursor position is enlarged and displayed in an enlarged cursor display area corresponding to the mouse cursor position in real time.
Conventional mouse cursor operations (click, move, etc.) can be performed simultaneously.

2. Configuration of Enlarged Cursor Function The functions of five programs (processes) for realizing the enlarged cursor function will be described below. • Cursor initialization program Receives various initial values as input parameters, sets these initial values in the buffer area, and displays the cursor or enlarged cursor. • Enlargement cursor enable program When the enlargement cursor is enabled while the enlargement cursor function is disabled, the enlargement cursor is displayed. • Cursor movement program Receives the position of the destination mouse cursor as a parameter, and moves the mouse cursor or enlarged cursor to that position. • Character and figure drawing program Receives the drawing start position of characters and figures on the screen and information necessary for drawing characters and figures as parameters, and displays the characters and figures and the cursor or magnified cursor.・ Enlargement cursor invalidation program When the enlargement cursor invalidation is executed while the enlargement cursor function is enabled, the display of the enlargement cursor is canceled.
Display the cursor.

FIG. 2 shows how the screen changes when the above five programs are executed.

In the screen (GD1) before the cursor is initialized, the mouse cursor position PD1 has already been determined by the input device (mouse or the like). When the cursor initialization program F1 is executed while the computer system having the enlarged cursor function is displaying the screen (GD1), a cursor image is displayed in the cursor display area AGDC1 corresponding to the mouse cursor position PD1 ( Screen (GD
10)). (Specified parameters: mouse cursor position PD1, initial state of enlargement cursor function invalid)

When the enlargement cursor enabling program F2 is executed while the screen (GD10) is displayed,
The enlarged cursor display area AGDL1 is displayed around the current mouse cursor position PD1 (see screen (GD20)).

When the cursor movement program F3 is executed while the screen (GD20) is displayed, the display contents of the enlarged cursor display area AGDL1 before the movement are returned to the state before the enlarged display, and the newly designated movement is performed. An enlarged image is displayed in the enlarged cursor display area AGDL2 corresponding to the destination PD2 (see screen (GD30)). (Specified parameter: destination mouse cursor position PD2)

When the character drawing program F4 is executed while the screen (GD30) is displayed, the designated character image is displayed (see the screen (GD40)).
(Specified parameters: drawing start position PD10, character code "E", character size)

In some cases, the enlarged cursor display area and the character image drawing area (the display area on the screen of the character image calculated based on the designated parameters and the font data held by the system) overlap. In such a case, the image of the enlarged cursor display area AGDL2 is displayed over the part of the character image drawing area, and a part of the character image drawing area overlapping the enlarged cursor display area AGDL2 is displayed on the screen. May not be displayed on the screen (see screen (GD40)).

When the enlargement cursor invalidating program F5 is executed while the screen (GD40) is displayed,
The enlarged cursor display area AGDL2 is returned to the state before the enlarged display, and the cursor display area corresponding to the mouse cursor position PD2
The cursor image is displayed on AGDC2 (Screen (GD50)
reference).

There are two methods for realizing the functions of these five programs (hereinafter simply referred to as functions).

The first method is to incorporate the function into a graphic support library (GSL) of the operating system. According to this method, an enlarged cursor function can be realized in a display area managed by the operating system, that is, the entire display area (display screen) of the display device.

The second method is to use a graphic support library (AGS) for the application program.
L). According to this method, it is possible to realize an enlarged cursor function in a display area (a window display area allocated to the application program in a general window system) managed by an application program incorporating the AGSL.

3. First Method (Method of Incorporating into GSL) FIG. 3 shows a system configuration for realizing the first method.

This system includes a central processing unit (CPU) 10
0, an associated output device (GD) 101 such as a graphic display device, an input device 102 (keyboard, mouse, etc.), a storage device (HD) 103, a video memory (VM) 104, and an internal memory Consists of 105.

In the internal memory 105, an application
A program 110 and a graphic support library (program group) having the above five functions (hereinafter referred to as GS
Operating system 120, including L) 121
And a VM control program (DD) 130 for inputting / outputting data from / to a video memory (VM) are loaded from the storage device 103 and executed by the central processing unit (CPU) 100.

In the internal memory 105, information to be described later of a buffer area 140 used by the GSL 121 for various calculations and information necessary for displaying characters on the output device (GD) 101 (character vector information, Font data 150 including color information, character image data, and the like, and cursor data (C) including information (a graphic message such as an arrow) necessary for displaying a mouse cursor on the output device (GD) 101.
D) 160 is loaded from the storage device 103.

FIG. 4 shows the configuration of the buffer area 140. In the buffer area 140, the following areas used by the GSL 121 are provided. (1) Enlargement flag (B-FLG) area 141 This is a storage area for storing the state of the enlargement cursor function (1 if valid, 0 if invalid). An initial value (for example, 0) is set by the cursor initialization processing. Also, a value (1 or 0) according to the instruction of the operator is set by the operating system. (2) Enlargement magnification (BM) area 142 This is a storage area for storing an integer value indicating the magnification when the enlargement target area is displayed in the enlargement cursor display area AGDL1. One pixel of the enlargement target area AGD1 is the enlargement cursor display area
It is displayed on AGDL1 with the number of pixels of the square of the magnification BM. An initial value is set by cursor initialization processing. The initial value can be changed arbitrarily. (3) Enlargement target area size (B-SL) area 143 Size information of enlargement target area AGD1 (width WL pixels, height
HL pixels). An initial value is set by cursor initialization processing. The initial value can be changed arbitrarily. (4) Cursor display area size (B-SC) area 144 Size information of the cursor display area AGDC1 (width WC pixels,
This is a storage area for storing height HC pixels. An initial value is set by cursor initialization processing. The initial value can be changed arbitrarily. (5) Character image data temporary storage area (BF) 145 A drawing starting position PDi indicated by a specific position (X coordinate Xi pixel, Y coordinate Yi pixel) on the screen serving as information necessary for displaying character image data. , Character image data drawing area size (width Wi pixels, height Hi pixels)
And character image data. i represents a subscript. Information in this area
It is specified as a parameter for character drawing processing, or acquired using the font information acquisition function of the operating system. This area BF is cleared by the cursor initialization processing. (6) Mouse cursor position temporary storage area (BP) 146 Current mouse cursor position PDi (X coordinate Xi pixel, Y
This is a storage area for temporarily storing coordinates (Yi pixels).
An initial value is set by cursor initialization processing. The mouse cursor position of the movement destination is set by the cursor movement function. (7) Enlarged cursor display area Image data save area (BL) 147 This is a storage area for temporarily saving the image data of the enlarged cursor display area AGDL1 before being enlarged. Cleared by cursor initialization processing. (8) Cursor display area Image data save area (B
-C) 148 This is a storage area for temporarily saving the AGDC1 image data in the cursor display area before the cursor image is set. Cleared by cursor initialization processing.

The processing procedure of the five functions in the first method will be described.

FIGS. 5, 6, 7, 8, and 9 show processing procedures (procedures according to programs) relating to the five functions in the first method and VMs corresponding to the respective procedures.
It shows the operation of the VM control device according to the control program (DD) 130 and the state of the video memory (VM) 104.

First, the notation common to these figures will be described.

The center of FIGS. 5, 7 and 8 and the right side of FIGS. 6 and 9 are flowcharts showing the processing procedure in each function of the GSL 121. Each step of the flowchart uses a unique symbol representing the processing content for simplification of the figure (the meaning of the symbol will be described later).

The double-line rectangles shown on the left and right of FIGS. 5, 7 and 8 and on the left of FIGS. 6 and 9 indicate the state of the image data set in the video memory (VM) 104 at a certain point in time. This is a “VM image” represented as a screen image. This is represented by (VMi). The subscript i changes according to the processing.
Represents alphanumeric characters to distinguish "images" from each other.
Screens (GDi) shown in FIGS. 1 and 2 (i is 1,10,20,30,40
Or, the same i is given to the “VM image” corresponding to 50).

The dashed arrows vertically connecting the “VM image” indicate the state transition (direction) of the video memory (VM) 104.

A rectangle indicated by a broken line in the “VM image” represents a specific area “VM area” in the video memory (VM) 104. AVMLi, AVMCi, AV
Expressed as Mi. The “VM areas” AVMLi, AVMCi, and AVMi are designated as “screen areas” AGDLi, AGCDi, and AGDi in the flowchart.

The broken-line rectangle shown in the screen (GDi) represents a specific area “screen area” in the screen display of the output device 101. These are denoted as AGDLi, AGDCi, and AGDi.
The “screen area” AGDLi, AGDDC, and AGDi are represented by data indicating a specific area on the screen, and the data is (X coordinate Xi pixel, Y coordinate Yi pixel, width Wi pixel, height Wi pixel,
VM control program (DD) including Hi-pixel information
Is converted to the corresponding "VM area" AVMLi, AVMCi, AVMi.

The "screen area" AGDLi, AGDDi, AGDi will be described.

The screen area AGDLi represents an enlarged cursor display area. This is the mouse cursor position PDi managed by the mouse cursor position temporary storage area BP in the buffer area.
(X coordinate Xi pixel, Y coordinate Yi pixel) and enlargement target area size (width WL) managed by enlargement target area size B-SL
Pixel, height HL pixel) and magnification BM. The enlarged cursor display area AGDLi corresponds to the “VM area” AVMLi.

The screen area AGCDi represents a cursor display area. This is the mouse cursor position PDi (X) managed in the mouse cursor position temporary storage area BP of the buffer area.
The coordinates are designated by coordinates Xi pixels, Y coordinates Yi pixels) and cursor display area sizes (width WC pixels, height HC pixels) managed by the cursor display area size B-SC. The cursor display area AGDCi corresponds to the “VM area” AVMCi.

The screen area AGDi represents a "screen area" of a character image displayed on the screen by the character drawing function. This is the drawing start position PDi (X coordinate Xi pixel, Y coordinate) managed in the character image data temporary storage area BF.
Yi pixel) and the drawing area size of the character image data (X coordinate Xi pixel, Y coordinate Yi pixel). The screen area AGDi corresponds to the “VM area” AVMi.

Mouse cursor position PD on screen display
i (X coordinate Xi pixel, Y coordinate Yi pixel) is “VM
It corresponds to PVi which represents a specific position in the "image".

Next, the symbols representing the processing contents described in each step of the flowchart will be described.

"GetVM ~ from ~" means that the data of the "VM area" is stored in a buffer and the VM control program (DD) 13
It represents that it is obtained (set) through 0.

“SetVM to to” indicates that the data of the buffer is stored in the “VM area” in the VM control program (DD) 130.
Is set via the.

“Enlarge BL to AGDLi” is a buffer
The mouse cursor position of the area Temporary storage area BP, area to be enlarged area B-SL, data managed in enlargement area BM, and enlarged image data obtained using data in buffer BL region
The setting is performed through the VM control program (DD) 130 in the “VM area” AVMLi designated by AGDLi.

"GetFont STR to BF" indicates that information necessary for displaying characters on the screen is acquired in the buffer BF. In the character drawing process, a drawing start position PDi, character code data STR, and a character size are obtained as parameters. Based on these parameters, the character image data and the drawing area size (width Wi pixels, height Hi pixels) of the character image data are obtained by using the font information acquisition function of the operating system. buffer
In BF, the drawing start position PDi, the drawing area size of the character image data, and the character image data are set.

Between each step of the flowchart and the “VM image”, a solid line rectangle representing a buffer used in the processing of the step and an enlargement set in the video memory (VM) 104 by the processing indicated by the Enlarge symbol A dashed rectangle representing the image data is shown.

In the place of <DD>, hardware (buffer or the like) or data (enlarged data or the like) used by the VM control program (DD) is shown. The VM control program (DD) 130 executed in response to the processing of each step of the flowchart (this relationship is indicated by a solid arrow).
Is indicated by a dashed arrow connecting the location of <DD> and the location of <video memory VM>. Data is set in the direction of the dashed arrow by the VM control program (DD) 130.

3-1. Cursor Initialization Processing FIG. 5 shows processing procedures related to the cursor initialization function, the operation of the VM control program (DD) 130 corresponding to each procedure, and the state of the video memory (VM) 104.

On the left side of FIG. 5, the state transition (VM1) (VM2) (VM) of the video memory (VM) 104 when the enlargement flag B-FLG = 1 (valid) is designated as the designated parameter
20) is shown. On the right side of FIG. 5, the state transition (VM) (VM3) of the video memory (VM) 104 when the enlargement flag B-FLG = 0 (invalid) is designated as the designated parameter
(VM10) is shown.

By starting the computer system,
An operating system initialization process is performed. A cursor initialization process is executed as one of the initialization processes of the operating system. The following parameters are specified by the operating system in the cursor initialization process. • Enlargement flag B-FLG = 0 (invalid) or 1 (valid) The state of the enlargement flag B-FLG may be fixed to one of them in the operating system, or the computer system may be shut down ( The state of the enlargement flag B-FLG when the power is turned off) may be adopted. -Integer value such as enlargement magnification BM = 2-Enlargement target area size area B-SL (integer value such as width = 100 pixels and height = 80 pixels)-Cursor area size area B-SC (width = 30 pixels,
Height = integer value such as 30 pixels)

The above parameter values are set in the buffer area as initial values (step S1).

If the enlargement flag B-FLG = 1 (valid) (YES in step S2), the enlargement cursor display area AGDL1
The data of the "VM area" AVML1 specified by the
It is obtained via the VM control program (DD) 130 (step S3). This step S3 is a process for storing the state before the enlarged cursor image data is set in the video memory (VM).

The mouse cursor position temporary storage area BP in the buffer area 140 and the enlargement target area size area BS
The enlarged image data obtained by using the data managed by the L, the enlargement magnification area BM, and the data of the buffer BL is stored in the “VM area” AVML1 designated by the enlarged cursor display area AGDL1 in the VM control program. It is set via (DD) 130 (step S4). As a result, enlarged cursor image data is set as shown in the VM image (VM20).

When the enlargement flag B-FLG = 0 (invalid) (NO in step S2), the data of the “VM area” AVMC1 specified by the cursor display area AGDC1 is stored in the cursor display area image data saving area BC. , Through the VM control program (DD) 130 (step S5).
). This step is a process for storing a state before the cursor image data is set in the video memory (VM).

Next, the cursor image data (CD) 160 data loaded in the internal memory is stored in the "VM area" AVMC1 designated by the cursor display area AGDC1.
Is set via the VM control program (DD) 130 (step S6). As a result, the VM image (VM10)
The cursor image data is set as shown in FIG.

3-2. FIG. 6 shows processing procedures related to the cursor enabling function, the operation of the VM control program (DD) 130 corresponding to each procedure, and the state of the video memory (VM) 104.

The state transitions (VM10), (VM11), (VM12), and (VM20) of the video memory (VM) 104 when the enlargement flag B-FLG = 0 (invalid) are shown on the left side of FIG.
In the enlargement cursor enable processing, the enlargement flag B-FLG = 1
In the case of (valid) (NO in step S11), nothing is performed.

One of the keys of the keyboard (input device 102) of the computer system is used for instructing the activation of the enlarged cursor. Instead, a menu for enabling the enlarged cursor by the operating system is displayed on a part of the display screen of the display device (output device 101).
A list or icon is displayed. The operator
Press the above-mentioned key for enabling the enlargement cursor, select the enablement of the enlargement cursor from the menu list on the display screen, or click the icon. In response, the operating system sets the enlargement flag B-FLG to 1 (valid) and executes the enlargement cursor validation processing.

The case where this processing is executed in the state of the VM image (VM10) will be described.

When the enlargement flag B-FLG = 0 (invalid) (YES in step S11), the data in the cursor display area image data saving area BC already stored is designated by the cursor display area AGDC1. "VM area"
It is set in the AVMC1 via the VM control program (DD) 130 (step S12). This step S12 is a process of erasing the already displayed cursor image data in order to return the state in the video memory (VM) 104 to the state before the cursor image data is set.
As a result, as shown in the VM image (VM11), the state before the cursor image data is set is obtained.

The data of the “VM area” AVML1 specified by the enlarged cursor display area AGDL1 is acquired in the enlarged cursor display area image data save area BL via the VM control program (DD) 130 (step S13).
This step S13 is a process for storing the state before the enlarged cursor image data is set in the video memory (VM) 104.

The mouse cursor position temporary storage area BP in the buffer area 140 and the enlargement target area size area BS
L, the data managed in the enlargement magnification area BM, and the enlarged image data obtained using the data in the buffer BL are set in the “VM area” AVML1 via the VM control program (DD) 130 (step). S14). As a result, enlarged cursor image data is set as shown in the VM image (VM20).

3-3. Cursor Movement Processing FIG. 7 shows processing procedures related to the cursor movement function, operations of the VM control program (DD) 130 corresponding to each procedure, and states of the video memory (VM) 104.

The state transitions (VM20), (VM21), (VM22), and (VM30) of the video memory (VM) 104 when the enlargement flag B-FLG = 1 (valid) are shown on the left side of FIG.
On the right side of FIG. 7, the state transition (VM10) (VM1) of the video memory (VM) when the enlargement flag B-FLG = 0 (invalid) is set.
3) (VM14) and (VM60) are shown.

When the operator moves the cursor with the mouse (input device 102), this is detected by the input control program (including the mouse cursor position PD2 of the movement destination), and the cursor movement processing is executed through the operating system. The destination mouse cursor position PD2 is specified as a parameter.

When the enlargement flag B-FLG = 1 (valid) (YES in step S21), the data in the enlarged cursor display area image data saving area BL already stored is designated by the enlargement cursor display area AGDL1. The VM control program (DD) 130 is stored in the “VM area” AVML1
(Step S22). This step S22
Is a process of deleting the already displayed enlarged cursor image data in order to return the state in the video memory (VM) 104 to the state before the enlarged cursor image data is set. As a result, as shown in the VM image (VM21), the state before the enlarged cursor image data is set is obtained.

Next, the mouse cursor position PD2 of the movement destination
Is set in the mouse cursor position temporary storage area BP (step S23).

The data of the "VM area" AVML2 designated by the enlarged cursor display area AGDL2 is acquired in the enlarged cursor display area image data save area BL via the VM control program (DD) 130 (step S24).
This step S24 is a process for storing the state before the enlarged cursor image data is set in the video memory (VM) 104.

The mouse cursor position temporary storage area BP of the buffer area and the enlargement target area size area B-SL
And data managed by the magnification area BM,
Then, the enlarged image data obtained using the data of the buffer BL is set in the “VM area” AVML1 via the VM control program (DD) 130 (step S25). As a result, the enlarged cursor image data of the movement destination is set as shown in the VM image (VM30).

When the enlargement flag B-FLG = 0 (invalid), the data in the cursor display area image data save area BC already stored is stored in the “VM area” AVMC1 specified by the cursor display area AGDC1, and the VM It is set via the control program (DD) 130 (step S26).
This step S26 is a process of deleting the cursor image data already displayed in order to return the state in the video memory (VM) 104 to the state before the cursor image data is set. As a result, the VM image (VM1
The state before cursor image data is set as shown in 3).

The destination mouse cursor position PD2 is set in the mouse cursor position temporary storage area BP (step S27).

The data of the "VM area" AVMC2 designated by the cursor display area AGDC2 of the movement destination is acquired in the cursor display area image data save area BC via the VM control program (DD) 130 (step S28).
This step S28 is processing for storing the state before the cursor image data is set in the video memory (VM) 104.

The cursor image data (CD) 160 loaded in the internal memory is stored in the "VM area" AVMC2 designated by the cursor display area AGDC2 at the destination.
It is set via the M control program (DD) 130 (step S29). As a result, the destination cursor image data is set as shown in the VM image (VM60).

3-4. Drawing process of characters and figures
It shows processing procedures relating to a drawing function for characters and the like, operations of the VM control program (DD) 130 corresponding to each procedure, and states of the video memory (VM) 104.

The state transition (VM30) (VM31) (VM32) (VM33) (VM40) of the video memory (VM) 104 when the enlargement flag B-FLG = 1 (valid) is shown on the left side of FIG. I have. On the right side of FIG. 8, the enlargement flag B-FLG = 0 (invalid)
The state transitions (VM60), (VM61), (VM62), (VM63), and (VM70) of the video memory (VM) 104 in the case (1) are shown.

Information necessary for drawing characters and figures (drawing start position, character code, character size, or image data representing a figure) is used as a parameter from an application program 110 (eg, a word processing program, a paint program, etc.). Upon receipt, drawing processing of characters and the like is executed. In FIG. 8, description will be given by taking character drawing as an example.

As the parameters, the drawing starting position PDi, character code data STR (character code “E”), and character size are obtained. Based on these parameters, the character image data and the drawing area size (width Wi pixels, height Hi pixels) of the character image data are obtained by using the font information acquisition function of the operating system. The drawing start position PDi, the drawing area size of the character image data, and the character image data are set in the buffer BF (step S31).

If the enlargement flag B-FLG = 1 (valid) (YES in step S32), the data in the enlarged cursor display area image data saving area BL already stored is designated by the enlargement cursor display area AGDL2. The VM control program (DD) 13
It is set via 0 (step S33). This step S3
3 is a process of deleting the already displayed enlarged cursor image data in order to return the state in the video memory (VM) 104 to the state before the enlarged cursor image data is set. As a result, the VM image (VM31)
The state before the enlarged cursor image data is set as shown in FIG.

The character image data in the temporarily acquired character image data temporary storage area BF is converted into the character drawing area determined by the drawing starting position PDi and the drawing area size of the character image data managed in the BF. AG
The "VM area" AVM10 designated by D10 is set via the VM control program (DD) 130 (step 34). As a result, character image data is set as shown in the VM image (VM32).

The data of the “VM area” AVML2 specified by the enlarged cursor display area AGDL2 is acquired in the enlarged cursor display area image data save area BL via the VM control program (DD) 130 (step S35).
This step S35 is a process for storing the state before the enlarged cursor image data is set in the video memory (VM) 104.

The data managed by the mouse cursor position temporary storage area BP of the buffer area, the enlargement target area size area B-SL, and the enlargement magnification area BM,
Then, the enlarged image data obtained using the data of the buffer BL is set in the "VM area" AVML2 via the VM control program (DD) 130 (step S36). As a result, enlarged cursor image data is set as shown in the VM image (VM40).

If the enlargement flag B-FLG = 0 (invalid) (NO in step S32), the data in the cursor display area image data save area BC already stored is designated by the cursor display area AGDC2. "VM area"
It is set in the AVMC 2 via the VM control program (DD) 130 (step S37). This step S37 is a process of erasing the already displayed cursor image data in order to return the state in the video memory (VM) 104 to the state before the cursor image data was set. As a result, as shown in the VM image (VM61), the state before the cursor image data is set is obtained.

Next, the previously obtained character image data in the character image data temporary storage area BF is converted into a character obtained from the drawing starting position PDi and the drawing area size of the character image data managed in the same BF. In the “VM area” AVM10 specified by the drawing area AGD10 of
It is set via the VM control program (DD) 130 (step 38). As a result, character image data is set as shown in the VM image (VM62).

The data of the “VM area” AVMC2 specified by the cursor display area AGDC2 is acquired in the cursor display area image data save area BC via the VM control program (DD) 130 (step S39). This step S39 is a process for storing a state before the cursor image data is set in the video memory (VM) 104.

The cursor image data (CD) 160 loaded in the internal memory is stored in the cursor display area AGDC.
2 is set via the VM control program (DD) 130 in the “VM area” AVMC2 designated by the “2” (step S
40). As a result, the cursor image data is set as shown in the VM image (VM70).

In this embodiment, the figure drawing process is not shown. Drawing processing of graphics can be realized by the same processing procedure as drawing processing of characters. However, instead of the character information, the information required for drawing a figure (such as the center point position, radius, and color for a circle) is received as a specified parameter, and the graphic image data is set in the “VM area” instead of the character image data. I do. The graphic image data is set in the "VM area" after the enlarged cursor or the cursor is deleted (step S34 or S38 in FIG. 8).

3-5. Figure 9 Cursor invalidation processing
9 shows the processing procedure relating to the cursor invalidation function, the operation of the VM control program (DD) 130 corresponding to each procedure, and the state of the video memory (VM) 104.

The state transitions (VM40), (VM41), (VM42), and (VM50) of the video memory (VM) 104 when the enlargement flag B-FLG = 1 (valid) are shown on the left side of FIG.
This function does nothing if the enlargement flag B-FLG = 0 (invalid) (NO in step S51).

One of the keys of the keyboard (input device 102) of the computer system is used for instructing disabling of the enlarged cursor. Instead of a display device (output device)
A menu list or an icon for disabling the enlarged cursor in the operating system is displayed in a part of the display screen of 101). The operator presses the above-mentioned key for disabling the enlargement cursor, or selects disabling the enlargement cursor from the menu list on the display screen, or clicks the icon. In response, the operating system sets 0 (invalid) to the enlarged cursor flag B-FLG, and
An enlarged cursor invalidation process is executed.

The key for instructing to disable the enlarged cursor can also be used as the above-mentioned key for enabling the enlarged cursor. In this case, each time this key is pressed, the activation and the invalidation are alternately repeated. Similarly, the menu on the display screen
A list or icon may also be used to enable and disable the magnifying cursor.

If the enlargement flag B-FLG = 1 (valid) (YES in step S51), the data in the enlarged cursor display area image data saving area BL already stored is specified by the enlargement cursor display area AGDL2. The VM control program (DD) 13
Set via 0 (step S52). This step S
52 is a process of deleting the already displayed enlarged cursor image data in order to return the state in the video memory (VM) 104 to the state before the enlarged cursor image data is set. As a result, the VM image (VM41)
The state before the enlarged cursor image data is set as shown in FIG.

Next, the data of the "VM area" AVMC2 specified by the cursor display area AGDC2 is obtained in the cursor display area image data save area BC via the VM control program (DD) 130 (step S53). This step S53 is a process for storing the state before the cursor image data is set in the video memory (VM) 104.

The cursor image data (CD) 160 loaded in the internal memory is stored in the cursor display area AGDC.
2 is set via the VM control program (DD) 130 in the "VM area" AVMC2 designated by the step 2 (step S5).
Four). As a result, cursor image data is set as shown in the VM image (VM50).

[0120] 4. Second Method (Method of Incorporating into AGSL) FIG. 10 shows a system configuration for realizing the second method.

This system comprises a central processing unit (CPU)
200, an output device (GD) 201 such as a graphic display device and the like, an input device 202 (keyboard, mouse, etc.), a storage device (HD) 203, and an internal memory 204.

The internal memory 204 stores an application program 2 including the AGSL 211 having the above five functions.
10 and a graphic support library that provides a display control function to the output device 201 (hereinafter referred to as GSLX)
The operating system 220 having the 221 is loaded and executed by the central processing unit (CPU) 200. The GSLX 221 displays and outputs the display data (image data) to and from the off-screen buffer 249 (B-XM) and the data of the off-screen buffer 249 (B-XM) on the output device (GD) 201. Screen display function.

In the internal memory 204, a buffer area 240 used by the AGSL 211 for various operations and information necessary for displaying characters on the output device (GD) 201 (character vector information, color information, character Font data 250 including image data and the like and cursor data (CD) 260 including information (a graphic message such as an arrow) necessary for displaying a mouse cursor on the output device (GD) 201 are loaded.

FIG. 11 shows the configuration of the buffer area 240. The following areas used by the AGSL 220 are provided in the buffer area 240. (1) Enlargement flag (B-FLG) area 241 This is a storage area for storing the state of the enlargement cursor function (1 if valid, 0 if invalid). An initial value (for example, 0) is set by the cursor initialization processing. Further, a value (1 or 0) according to the instruction of the operator is set by the application program 210. (2) Magnification magnification (BM) area 242 This is a storage area for storing an integer value indicating a magnification when the enlargement target area is displayed in the enlargement cursor display area. One pixel of the enlargement target area AGD1 is displayed in the enlargement cursor display area AGDL1 with the number of pixels of the square of the enlargement magnification BM. An initial value is set by cursor initialization processing. The initial value can be changed arbitrarily. (3) Enlarged cursor display area size (B-SL) area 243 This is a storage area for storing size information (width WL pixels, height HL pixels) of the enlarged cursor display area AGDL1. An initial value is set by cursor initialization processing. The initial value can be changed arbitrarily. (4) Cursor display area size (B-SC) area 244 Size information of cursor display area AGDC1 (width WC pixels,
This is a storage area for storing height HC pixels. An initial value is set by cursor initialization processing. The initial value can be changed arbitrarily. (5) Character image data temporary storage area (BF) 245 A drawing starting position PDi indicated by a specific position (X coordinate Xi pixel, Y coordinate Yi pixel) on the screen which is information necessary for displaying character image data. , Character image data drawing area size (width Wi pixels, height Hi pixels)
And character image data. i represents a subscript. The information of these areas is specified as a parameter of the character drawing process, or obtained using a font information obtaining function of the operating system. This area 245 is cleared by the cursor initialization processing. (6) Mouse cursor position temporary storage area (BP) 246 Current mouse cursor position PDi (X coordinate Xi pixel, Y
This is a storage area for temporarily storing coordinates (Yi pixels).
An initial value is set by cursor initialization processing. The mouse cursor position of the movement destination is set by the cursor movement function. (7) Enlarged cursor display area Image data save area (BL) 247 This is a storage area for temporarily saving the image data of the enlarged cursor display area before being enlarged. Cleared by cursor initialization processing. (8) Cursor display area Image data save area (B-
C) 248 This is a storage area for temporarily saving the image data in the cursor display area before the cursor image is set. Cleared by cursor initialization processing. (9) Off-screen buffer (B-XM) 249 This is a storage area for storing image data to be displayed on the screen. The five functions of AGSL211 include off-screen
The screen display control to the output device 201 is performed using the input / output function of the buffer (B-XM) 249 and the GSLX 221 and the screen display function described above. Cleared by cursor initialization processing.

Next, the processing procedure of the five functions in the second method will be described. FIG. 12, FIG. 13, FIG. 14, FIG. 15, and FIG. 16 show a procedure according to a processing procedure program relating to five functions in the second method, and a G corresponding to each procedure.
It shows the operation of the SLX 221 and the state of the off-screen buffer (B-XM) 249.

First, the notation common to these figures will be described.

The flowcharts showing the processing procedures in each function of the AGSL 211 are shown at the right side of FIGS. 12, 13, 15, and 16 and at the center of FIG. Each step of the flowchart uses a unique symbol representing the processing content for simplification of the figure (the meaning of the symbol will be described later).

The double-line rectangles shown on the left side of FIGS. 12, 13, 15, and 16 and the left and right sides of FIG. 14 are set in the off-screen buffer (B-XM) 249 at a certain point in time. This is an “XM image” that represents the state of image data as a screen image. This is represented by (XMi). i represents an alphanumeric character for distinguishing the “XM image” that changes with processing from each other. “XM image” corresponding to the screen (GDi) shown in FIGS. 1 and 2 (i is 1, 10, 20, 30, 40 or 50)
Have the same i.

The dashed arrows vertically connecting the “XM image”
The state transition (direction) of the off-screen buffer (B-XM) 249 is shown.

A rectangle indicated by a broken line in the “XM image” represents a specific area “XM area” in the off-screen buffer (B-XM) 249. This is AXMLi, A
XMCi, AXMi. "XM area" AXMLi, AXMCi, AXMi
Is the "screen area" AGDLi, AGCDi, AG
Specified as Di.

A broken-line rectangle shown in the screen (GDi) indicates a specific area “screen area” in the screen display of the output device 201. These are denoted as AGDLi, AGDCi, and AGDi.
The “screen area” AGDLi, AGDDC, and AGDi are represented by data indicating a specific area on the screen, and the data is (X coordinate Xi pixel, Y coordinate Yi pixel, width Wi pixel, height Wi pixel,
(Hi pixel) information and converted into the corresponding "XM area" AXMLi, AXMCi, AXMi by the GSLX221.

Next, the "screen area" AGDLi, AGDDi, AGDi will be described.

The screen area AGDLi represents an enlarged cursor display area. This is the mouse cursor position PDi managed by the mouse cursor position temporary storage area BP in the buffer area.
(X coordinate Xi pixel, Y coordinate Yi pixel) and enlargement cursor display area size (width WL pixel, height HL pixel) managed by the enlargement target area size B-SL and enlargement magnification BM. The enlarged cursor display area AGDLi is
It corresponds to "XM area" AXMLi.

The screen area AGCDi represents a cursor display area. This is the mouse cursor position PDi (X) managed in the mouse cursor position temporary storage area BP of the buffer area.
The coordinates are designated by coordinates Xi pixels, Y coordinates Yi pixels) and cursor display area sizes (width WC pixels, height HC pixels) managed by the cursor display area size B-SC. The screen area AGCDi corresponds to the “XM area” AXMCi.

The screen area AGDi represents a "screen area" of a character image displayed on the screen by the character drawing function. This is the drawing start position PDi (X coordinate Xi pixel, Y coordinate) managed in the character image data temporary storage area BF.
Yi pixel) and the drawing area size of the character image data (X coordinate Xi pixel, Y coordinate Yi pixel). The screen area AGDi corresponds to the “XM area” AXMi.

Position PD of mouse cursor on screen display
i (X coordinate Xi pixel, Y coordinate Yi pixel) is “XM
It corresponds to PXi, which represents a specific location in the image.

Next, the symbols representing the processing contents described in each step of the flowchart will be described.

“GetXM to from” indicates that data in the “XM area” is to be obtained (set) in the buffer via the GSLX221.

“SetXM to to” indicates that the buffer data is set in the “XM area” via the GSLX221.

“EnlargeX BL to AGDL1” includes a mouse cursor position temporary storage area BP in the buffer area,
The GSLX221 is stored in the “XM area” AXMLi specified by the expansion cursor area AGDLi, and the expanded image data obtained using the data managed by the expansion target area size B-SL and the expansion magnification BM and the data in the buffer BL is stored in the GSLX221. Through the setting.

"GetFont STR to BF" indicates that information necessary for displaying characters on the screen is acquired in the buffer BF. In the character drawing process, a drawing start position PDi, character code data STR, and a character size are obtained as parameters. Based on these parameters, the character image data and the drawing area size (width Wi pixels, height Hi pixels) of the character image data are obtained by using the font information acquisition function of the operating system. buffer
In BF, the drawing start position PDi, the drawing area size of the character image data, and the character image data are set.

Between each step of the flowchart and the “XM image”, a solid rectangle representing a buffer used in the processing of the step and an off-screen buffer (B-XM) 249 by the processing indicated by the EnlargeX symbol
A dashed rectangle representing the enlarged image data set in is set. <GSL> indicates hardware (buffer or the like) or data (enlarged data or the like) used by the GSLX221. The operation of the GSLX 221 executed in response to the processing of each step of the flowchart (indicating this relationship by a solid arrow) is indicated by a broken arrow connecting the <GSL> point and the <off-screen buffer B-XM) point. It is shown. The data is set by the GSLX 221 in the direction of the dashed arrow.

4-1. Cursor Initialization Processing FIG. 12 shows processing procedures related to the cursor initialization function, the operation of the GSLX 221 corresponding to each procedure, and the state of the off-screen buffer (B-XM) 249.

On the left side of FIG. 12, the state transition (XM1) (XM) of the off-screen buffer (B-XM) 249 when the enlargement flag B-FLG = 1 (valid) is designated as the designated parameter
M2) (XM20) is shown. This feature works with the expansion flag
If B-FLG = 0 (invalid) (NO in step S102)
), Do nothing.

First, a case where the designated cursor is set to enable the enlarged cursor function will be described. In the state of (XM1), this function is executed with the following parameters specified.

Upon activation of the application program 210, initialization processing of the application program 210 is executed. Application program 210
The cursor initialization process is executed as one of the initialization processes. The following parameters are specified by the application program 210 in the cursor initialization process. • Enlargement flag B-FLG = 0 (invalid) or 1 (valid) The state of the enlargement flag B-FLG may be fixedly set to one of them in the application program 210, or the state of the application program 210 The state of the enlargement flag B-FLG at the time of termination may be adopted. -Integer value such as enlargement magnification BM = 2-Enlargement target area size area B-SL (integer value such as width = 100 pixels, height = 80 pixels)-Cursor area size area B-SC (width = 30 pixels,
Height = integer value such as 30 pixels)

The above parameter values are set as initial values in the buffer area (step S101).

If the enlargement flag B-FLG = 1 (valid) (YES in step S101), the data of the “XM area” AXML1 specified by the enlargement cursor display area AGDL1 is transferred to the enlargement cursor display area image data saving area BL to G
It is obtained via the SLX 221 (step S103). This step S103 is processing for saving the state before the enlarged cursor image data is set in the off-screen buffer (B-XM) 249.

The mouse cursor position temporary storage area BP of the buffer area 240 and the enlargement target area size area BS
The enlarged image data obtained using the data managed in the L, the enlargement magnification area BM, and the data in the buffer BL is set via the GSLX221 in the “XM area” AXML1 specified by the enlarged cursor display area AGDL1. (Step S104). As a result, the XM image (XM2
The enlarged cursor image data is set as shown in (0).

Finally, the off-screen buffer (BX)
M) The data of 249 is displayed on the screen using the function of the GSLX221 (step S105).

4-2. Enlarging Cursor Validation Process FIG. 13 shows the processing procedure relating to the cursor validation function, the operation of the GSLX 221 corresponding to each procedure, and the state of the off-screen buffer (B-XM) 249.

On the left side of FIG. 13, the off-screen buffer (B-XM) when the enlargement flag B-FLG = 0 (invalid)
249 state transitions (XM10), (XM11), and (XM12) are shown. This function does nothing when the enlargement flag B-FLG = 1 (valid) (NO in step S111).

One of the keys of the keyboard (input device 202) of the computer system is used for instructing the activation of the enlarged cursor. Instead of a display device (output device)
A menu list or an icon for enabling the enlarged cursor in the application program 210 is displayed on a part of the display screen of (201). The operator presses the above-mentioned key for enabling the enlarged cursor, or
Alternatively, select Enable Zoom Cursor from the menu list on the display screen, or click the icon. In response, the application program 210 sets the enlargement flag B-FLG to 1 (valid) and executes the enlargement cursor validation processing.

This function is executed in the state of the XM image (XM10). If the enlargement flag B-FLG = 0 (invalid) (YES in step S111), the enlargement cursor display area
The data of the "XM area" AXML1 specified by AGDL1 is transferred to the enlarged cursor display area image data save area B-
L is acquired via the GSLX 221 (step S112).
This step S112 is a process for storing the state before the enlarged cursor image data is set in the off-screen buffer (B-XM) 249.

The mouse cursor position temporary storage area BP in the buffer area 240 and the enlargement target area size area BS
The enlarged image data obtained using the data managed in L and the enlargement magnification area BM and the data in the buffer BL is set in the "XM area" AXML1 via the GSLX221 (step S113). As a result, enlarged cursor image data is set as shown in the XM image (XM20).

Finally, the off-screen buffer (BX)
M) The data of 249 is displayed on the screen using the function of the GSLX221 (step S114).

4-3. Cursor Movement Processing FIG. 14 shows processing procedures related to the cursor movement function, the operation of the GSLX221 corresponding to each procedure,
This shows the state of the buffer (B-XM) 249.

On the left side of FIG. 14, the off-screen buffer (B-XM) when the enlargement flag BF = 1 (valid)
249 state transitions (XM20) (XM21) (XM22) (XM30) are shown.

When the operator moves the cursor with the mouse (input device 202), this is detected by the operating system via the input control program (including the mouse cursor position PD2 at the destination) and the cursor is moved through the application program 210. The processing is executed. The destination mouse cursor position PD2 is specified as a parameter.

If the enlargement flag B-FLG = 1 (valid) (YES in step S121), the data in the enlarged cursor display area image data saving area BL already stored is designated by the enlargement cursor display area AGDL1. The “XM area” AXML1 to be set is set via the GSLX 221 (step S122). This step S122 is processing for erasing the already displayed enlarged cursor image data in order to return the state in the off-screen buffer (B-XM) 249 to the state before the enlarged cursor image data was set. As a result, as shown in the XM image (XM21), the state before the enlarged cursor image data is set is obtained.

Next, the mouse cursor position PD2 of the movement destination
Is set in the mouse cursor position temporary storage area BP (step S123).

The data of the “XM area” AXML2 specified by the enlarged cursor display area AGDL2 is acquired in the enlarged cursor display area image data save area BL via the GSLX221 (step S124). This step S124
Is a process for storing the state before the enlarged cursor image data is set in the off-screen buffer (B-XM) 249.

The mouse cursor position temporary storage area BP in the buffer area and the enlargement target area size area B-SL
Then, the enlarged image data obtained using the data managed in the enlargement magnification area BM and the data in the buffer BL is set in the "XM area" AXML1 via the GSLX221 (step S125). As a result, an XM image (XM
As shown in 30), the enlarged cursor image data of the movement destination is set.

Finally, the off-screen buffer (BX)
M) The data of 249 is displayed on the screen using the function of GSLX221 (step S126).

If the enlargement flag B-FLG = 0 (invalid) (NO in step S121), the mouse cursor position P of the movement destination
D2 is set in the mouse cursor position temporary storage area BP (step S127). Enlargement flag B-FLG = 0 (invalid)
In the case of, the off-screen buffer (B-XM) 249 is not updated and displayed on the screen.

4-4. Drawing process of character Figure 15 shows the processing procedure related to the drawing function of characters and the like, the operation of GSLX 221 corresponding to each procedure, and the
This shows the state of the buffer (B-XM) 249.

On the left side of FIG. 15, the off-screen buffer (B-XM) when the enlargement flag B-FLG = 1 (valid)
249 state transitions (XM30) (XM31) (XM32) (XM33) (XM
40) is shown. The enlarged flag B-FLG is shown on the right side of FIG.
The state transition (VM60) (VM61) of the off-screen buffer (B-XM) 249 when = 0 (invalid) is shown.

Information necessary for drawing characters and figures (drawing start position, character code, character size, or image data representing figures) is used as a parameter from the application program 210 (eg, word processing program, paint program, etc.). Upon receipt, drawing processing of characters and the like is executed. In FIG. 15, description will be given by taking character drawing as an example.

As parameters, the drawing start position PDi, character code data STR (character code “EE”), and character size are obtained. Based on these parameters, using the font information acquisition function of the operating system,
The character image data and the drawing area size (width Wi pixels, height Hi pixels) of the character image data are obtained. The drawing start position PDi, the drawing area size of the character image data, and the character image data are set in the buffer BF (step S131).

If the enlargement flag B-FLG = 1 (valid) (YES in step S131), the data in the enlarged cursor display area image data save area BL already stored is designated by the enlargement cursor display area AGDL2. The "XM area" AXML2 to be set is set via the GSLX221 (step S133). This step S133 is processing for erasing the already displayed enlarged cursor image data in order to return the state in the off-screen buffer (B-XM) 249 to the state before the enlarged cursor image data was set. As a result, as shown in the XM image (XM31), the state before the enlarged cursor image data is set is obtained.

The data in the previously acquired character image data temporary storage area BF is converted into the drawing start position PDi managed in the same BF and the character drawing area AGD10 obtained from the character image data drawing area size. The designated "XM area" AXM10 is set via the GSLX221 (step 134). As a result, the XM image (X
As shown in M32), character image data is set.

The data of the “XM area” AXML2 specified by the enlarged cursor display area AGDL2 is stored in the GSLX221 in the enlarged cursor display area image data save area BL.
(Step S135). This step S135
Is a process for storing the state before the enlarged cursor image data is set in the off-screen buffer (B-XM) 249.

The mouse cursor position temporary storage area BP in the buffer area and the enlarged cursor area size area B-
The enlarged image data obtained using the data managed in the SL, the enlargement magnification area BM, and the data in the buffer BL is set in the “XM area” AXML2 via the GSLX221 (step S136). As a result, enlarged cursor image data is set as shown in the XM image (XM40).

Finally, the off-screen buffer (BX)
M) The contents of 249 are displayed on the screen using the function of the GSLX221 (step S137).

If the enlargement flag B-FLG = 0 (invalid) (NO in step S132), the data in the character image data temporary storage area BF acquired earlier is stored in the drawing BF managed in the same BF. AGD10 character drawing area determined by the origin position PDi and the character image data drawing area size
Is set via the GSLX 221 in the "XM area" AXM10 corresponding to (step 138). As a result, character image data is set as shown in the XM image (XM61).

Finally, the off-screen buffer (BX)
M) The data of 249 is displayed on the screen using the function of GSLX221 (step S137).

This embodiment does not show the graphic drawing function. The graphic drawing function can be realized by the same processing procedure as the character drawing function. However, instead of the character information, information required for drawing a figure (such as the center point, radius, and color for a circle) is received as a specified parameter, and the figure image data is set in the "XM area" instead of the character image data. I do. The graphic image data is deleted after the enlarged cursor or the cursor is deleted (step S134 or S1 in FIG. 8).
38) Set to “XM area”.

4-5. Enlarged Cursor Invalidation Processing FIG. 16 shows the processing procedure relating to the cursor invalidation function, the operation of the GSLX 221 corresponding to each procedure, and the state of the off-screen buffer (B-XM) 249.

The left side of FIG. 16 shows an off-screen buffer (BX) in the case where the enlargement flag B-FLG = 1 (valid).
M) 249 state transitions (XM40) and (XM41) are shown.
This function does nothing if the enlargement flag B-FLG = 0 (invalid) (NO in step S151).

One of the keys of the keyboard (input device 202) of the computer system is used for instructing disabling of the enlarged cursor. Instead of a display device (output device)
A menu list or an icon for disabling the enlarged cursor in the application program 210 is displayed on a part of the display screen of (201). The operator presses the above-mentioned key for disabling the enlarged cursor, or
Or, select “Disable zoom cursor” from the menu list on the display screen, or click the icon. In response to this, the application program 210 sets the enlarged cursor flag B-FLG to 0 (invalid) and executes the enlarged cursor invalidation processing.

The key for instructing invalidation of the enlarged cursor can also be used as the above-mentioned key for enabling the enlarged cursor. In this case, each time this key is pressed, the activation and the invalidation are alternately repeated. Similarly, the menu on the display screen
A list or icon may also be used to enable and disable the magnifying cursor.

When the enlargement flag B-FLG = 1 (valid) (YES in step S151), the data in the image data saving area BL already stored in the enlarged cursor display area is designated by the enlarged cursor display area AGDL2. The "XM area" AXML2 to be set is set via the GSLX221 (step S152). This step S152 is processing for deleting the already displayed enlarged cursor image data in order to return the state in the off-screen buffer (B-XM) 249 to the state before the enlarged cursor image data is set. As a result, the state before the enlarged cursor image data is set is obtained as shown in (XM41).

Finally, the off-screen buffer (BX)
M) The data of 249 is displayed on the screen using the function of GSLX221 (step S153).

[Brief description of the drawings]

FIGS. 1A and 1B show an example of a screen display of a computer system having an enlargement cursor function.

FIG. 2 shows a screen transition when five programs are executed.

FIG. 3 shows a system configuration for realizing the first method.

FIG. 4 shows a configuration of a buffer area.

FIG. 5 shows a processing procedure relating to a cursor initialization function, an operation of a VM control program corresponding to each procedure, and a state of a video memory.

FIG. 6 shows a processing procedure relating to a cursor enabling function, an operation of a VM control program corresponding to each procedure, and a state of a video memory.

FIG. 7 shows a processing procedure relating to a cursor movement function, an operation of a VM control program corresponding to each procedure, and a state of a video memory.

FIG. 8 shows a processing procedure relating to a drawing function for characters and the like, an operation of a VM control program corresponding to each procedure, and a state of a video memory.

FIG. 9 shows a processing procedure relating to a cursor invalidation function, an operation of a VM control program corresponding to each procedure, and a state of a video memory.

FIG. 10 shows a system configuration for realizing the second method.

FIG. 11 shows a configuration of a buffer area.

FIG. 12 shows a processing procedure relating to a cursor initialization function, an operation of GSLX corresponding to each procedure, and an off-screen operation.
Indicates the status of the buffer.

FIG. 13 shows a processing procedure relating to a cursor enabling function, an operation of GSLX corresponding to each procedure,
Indicates the status of the buffer.

FIG. 14 shows a processing procedure relating to a cursor movement function, an operation of GSLX corresponding to each procedure, and a state of an off-screen buffer.

FIG. 15 shows a processing procedure relating to a drawing function for characters and the like, an operation of GSLX corresponding to each procedure, and a state of an off-screen buffer.

FIG. 16 shows a processing procedure relating to a cursor invalidation function, an operation of GSLX corresponding to each procedure,
Indicates the status of the buffer.

[Explanation of symbols]

 100 Central processing unit 101 Output device 102 Input device 104 Video memory 130 VM control program

Claims (25)

[Claims] 1. An image in an enlargement target range including a position designated by a pointing device on a display screen for displaying image data stored in an image memory is enlarged to an enlarged display range including the designated position. This is a method of displaying the image data. The image data in the area corresponding to the enlarged display range in the image memory is saved in a buffer, and the image data in the area corresponding to the enlargement target area is enlarged at a predetermined magnification to reduce the enlarged image data. An enlarged display method for performing enlarged display processing of writing enlarged image data into an area corresponding to the enlarged display range in the image memory. 2. The method according to claim 1, wherein the enlargement display processing is performed in response to an enlargement activation instruction from the enlargement instruction device. 3. The method according to claim 1, wherein the image data saved in the buffer is returned to an original area in the image memory in response to an enlargement invalidation instruction from the enlargement instruction device. 4. In response to the designation of a new position by a pointing device, the image data saved in the buffer is returned to the original area in the image memory, and the designated new position is enlarged and displayed. The method of claim 1, wherein the processing is performed. 5. In response to new image data such as a character or a figure being provided together with a designated position, the image data saved in the buffer is returned to the original area in the image memory, and is newly provided. 2. The method according to claim 1, wherein the enlarged image processing is performed after writing the image data in the area of the image memory corresponding to the designated position. 6. The method according to claim 1, wherein a video memory is used as the image memory, and the enlarged display processing is performed by an operating system of the computer. 7. An enlarged display process using an off-screen buffer as an image memory by an application program executed on an operating system having a display control function using an off-screen buffer. 2. The method according to 1. 8. When the data instructing the enlargement display processing does not instruct the enlargement display processing, a cursor is displayed at a position designated by a pointing device instead of the enlargement display processing. The method according to any one of claims 1 to 7. 9. A center position of the enlargement target range and the enlargement display range is the same as a position designated by a pointing device, and the enlarged image data includes cross mark image data indicating the center position. 2. The method according to 1. 10. The method according to claim 1, further comprising the step of surrounding the enlarged image data with frame image data indicating a boundary of the enlarged display range. 11. An image in an enlargement target range including a position designated by a pointing device on a display screen displaying image data stored in an image memory is enlarged to an enlarged display range including the designated position. Means for displaying, in a buffer, image data in an area corresponding to the enlarged display range in the image memory;
Means for creating enlarged image data obtained by enlarging the image data in the area corresponding to the enlargement target range at a predetermined magnification, and means for writing the enlarged image data to an area in the image memory corresponding to the enlarged display range Display device. 12. A program for enlarging image data stored in an image memory in an enlargement range including a specified position on a display screen and displaying the image in an enlarged display range including the specified position. The image data in the area corresponding to the enlarged display range in the image memory is saved in a buffer, and the image data in the area corresponding to the enlarged target area is enlarged at a predetermined magnification to obtain enlarged image data. A computer-readable recording medium storing a program for controlling a computer to perform an enlarged display process for writing into an area corresponding to the enlarged display range in an image memory. 13. The computer-readable recording medium according to claim 12, wherein a program for controlling a computer to perform an enlargement display process in response to an enlargement activation instruction is stored. 14. A program for controlling a computer to return image data saved in a buffer to an original area in an image memory in response to an instruction to invalidate enlargement. Computer readable recording medium. 15. Responsive to the designation of a new position, the image data saved in the buffer is returned to the original area in the image memory, and the enlarged display processing is performed on the designated new position. 13. The computer-readable recording medium according to claim 12, wherein a program for controlling a computer is stored in the computer. 16. In response to new image data such as a character or a figure being provided along with a designated position, the image data saved in the buffer is returned to the original area in the image memory, and is newly provided. 13. The computer-readable recording medium according to claim 12, wherein the computer-readable recording medium stores a program for controlling the computer to perform the enlarged display processing after writing the image data in an area of the image memory corresponding to the designated position. 17. A computer for controlling a computer such that a center position of the enlargement target range and the enlargement display range is the same as a designated position, and that the enlarged image data includes cross mark image data indicating the center position. 13. The computer-readable recording medium according to claim 12, wherein the program is stored. 18. The computer-readable program according to claim 12, wherein a program for controlling a computer is stored around the enlarged image data so as to include frame image data indicating a boundary of the enlarged display range. recoding media. 19. An operating system for enlarging an image in an enlargement range including a designated position on a display screen and displaying the image data stored in the video memory on an enlarged display range including the designated position. An instruction to save the image data in the area corresponding to the above-described enlarged display range in the video memory to a buffer, an instruction to enlarge the image data in the area corresponding to the above-mentioned enlargement target area by a predetermined magnification, And a command for writing the enlarged image data in an area corresponding to the enlarged display range in the video memory. 20. An image display apparatus for enlarging an image in an enlargement target range including a specified position on a display screen and displaying the image data stored in the off-screen buffer in an enlarged display range including the specified position. An application program, an instruction to save image data in an area corresponding to the enlarged display range in the off-screen buffer to a buffer, an instruction to enlarge image data in an area corresponding to the enlarged target area at a predetermined magnification, And a command for writing the enlarged image data in an area corresponding to the enlarged display range in the video memory. 21. Image conversion of an image in a conversion target range including a position specified by a pointing device on a display screen displaying image data stored in an image memory, and display of a converted image including the specified position Means for saving the image data in the area corresponding to the converted image display area in the image memory to a buffer, and performing predetermined image conversion on the image data in the area corresponding to the conversion target area in the image memory An image display device comprising: means for creating obtained converted image data; and means for writing the converted image data to an area in the image memory corresponding to the converted image display range. 22. The image display device according to claim 21, wherein the image conversion is an image enlargement conversion, a rotation conversion, a color conversion, or a mosaic conversion. 23. A program for converting image data stored in an image memory into an image in a conversion target range including a designated position on a display screen and displaying the image in a converted image display range including the designated position. The image data in the area corresponding to the converted image display range in the image memory is saved in a buffer, and the converted image data obtained by performing predetermined image conversion on the image data in the area corresponding to the conversion target range is stored in the buffer. A computer-readable recording medium storing a program for controlling a computer to perform a converted image display process of writing converted image data into an area corresponding to the converted image display range in an image memory. 24. The computer-readable recording medium according to claim 23, wherein the image conversion is an image enlargement conversion, a rotation conversion, a color conversion, or a mosaic conversion. 25. The method according to claim 1, wherein when a processing instruction is given, processing proceeds to a processing associated with the given processing instruction and a position specified by the pointing device.