JPH09128197A - Graphic image moving display method - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To enable movement control of a graphic image without flicker. When there is no graphic image, a lower image displayed at a display position of the graphic image is stored in a lower image storage unit, and when a graphic image is moved by a mouse 30, The image processor 10 reads the image of the third area including the first area before the movement and the second area after the movement from the video memory 40 to the work memory 23, and the lower image is stored in the first area portion of the work memory. The lower image before movement stored in the storage unit 22 is copied. After that, the image in the second area portion of the working memory is saved as a lower image after the movement, and then the graphic image is copied to the second area portion of the working memory. After copying, the image in the third area portion of the working memory is copied into the third area of the video memory 40, and the image stored in the video memory is displayed on the display screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic image moving and displaying method, and more particularly to a graphic image moving and displaying method for moving a graphic image from a first area to a second area and displaying it on a display screen.

[0002]

2. Description of the Related Art The following method has been conventionally used to move a graphic image displayed on a display screen from a first area to a second area for display. That is, when the lower image of the graphic image is saved and a predetermined graphic image is moved,
The stored lower image is copied to the first area of the video memory (the area before the movement), and the image data of the second area (the destination area) of the video memory is copied to the lower image of the graphic image after the movement. Then, the graphic image separately stored in the second area of the video memory is copied, and the image stored in the video memory is displayed on the display screen.

8 and 9 are explanatory views of such a conventional graphic image movement control, in which 1 is a display screen and 2 is a display screen.
Is a graphic image before moving, 3 is a graphic image after moving, 4 is a video memory (screen memory) for storing a bitmap image to be displayed on the display screen, 5 is a lower image before moving, and 6 is lower at the moving destination. An image, 7 is a graphic image stored separately. The subordinate image is a subordinate image displayed at the display position of the graphic image when the graphic image is not present. Therefore, the lower image includes other images when a plurality of images are displayed in a superimposed manner. Hereinafter, the lower image may be referred to as a background image for the sake of explanation. The lower image of the graphic image is always saved.

Graphic image 2 by operating a mouse or the like
When a request to move (FIG. 8) to the dotted line position and display as shown on the right side of FIG.
The saved lower image 5 is copied to the first area (refer to (1)) (area before movement). As a result, an image when the graphic image 2 does not exist is displayed on the display screen as shown in FIG. 9 (2). Next, the second area of the video memory (the destination area, see the dotted line in Figure 9 (2))
The image data of is stored as a subordinate image of the moved graphic image. After that, as shown in FIG. 9 (3), if the graphic image 7 separately stored in the second area of the video memory 4 is copied, as shown in FIG. The image is stored. After that, the image stored in the video memory 1 is output to the display screen.

[0005]

However, the conventional graphic image movement control has a problem that the image appears to flicker. FIG. 10 is a diagram for explaining the problems of the conventional graphic image movement control method. Assuming that the image is moved as indicated by the arrow as shown in FIG. 10 (a), the image of the region D1 that does not overlap the second region after the movement in the first region before the movement is shown in FIG. As shown in, the graphic image before moving is changed only once to the lower image (background image). Further, the image of the area D2 which does not overlap the first area before the movement in the second area after the movement is changed once from the lower image (background image) to the graphic image after the movement as shown in FIG. 10C. Only. Therefore, there is no flicker in these parts. However, the image of the overlapping area D3 in which the first area and the second area overlap each other changes twice as shown in FIG. 10 (d): the graphic image before movement → the background image → the graphic image after movement. . And the graphic image 2 before moving
It takes time until the graphic image 3 after being moved is drawn after being erased, and the background image gets into the operator's eyes and flicker occurs during that time.

From the above, a first object of the present invention is to provide a method for controlling the movement of a graphic image without flicker. A second object of the present invention is to provide a graphic image movement control method that can reduce the amount of hardware and can suppress flickering.

[0007]

According to the present invention, the first object is to save a lower image displayed at a display position of a graphic image when there is no graphic image, and to save the graphic image. When there was a move operation,
Means for reading out an image of the third area including the first area before the movement and the second area after the movement from the video memory to the working memory, the first area portion of the working memory, which has been stored before the movement. A means for copying the lower-order image, a means for copying the lower-order image before moving, and a means for saving the image in the second area portion of the working memory as the lower-order image after moving, a second means for working
Means for copying the graphic image to the area portion, then means for copying the image of the third area portion of the working memory to the third area of the video memory, and displaying the image stored in the video memory on the display screen Achieved by means. ... Claim 1

According to the present invention, the second object is means for storing a lower image displayed at a display position of the graphic image when the graphic image is not present,
When there is an operation to move the graphic image,
Means for copying a corresponding portion of the stored lower image in the video memory portion that does not overlap with the second area after the movement, in the portion where the first area before the movement and the second area after the movement overlap Means for generating and storing the lower image after the movement using the corresponding lower image data that has been stored and the image data of the video memory portion that does not overlap the first region before the movement in the second region after the movement. , A means for copying the graphic image in the second area of the video memory, and a means for displaying the image stored in the video memory on a display screen. ... Claim 2

According to the present invention, each of the above objects further includes means for saving a lower image displayed at the graphic image display position when there is no graphic image, and first graphic image moving display means. When the moving amount is small and the overlapping amount of the first and second regions is large with the second graphic image moving / displaying unit, the graphic image moving / displaying is performed based on the first graphic image moving / displaying unit, and the moving is performed. When the amount is large and the overlapping amount of the first and second regions is small, the graphic image moving and displaying means is provided based on the second graphic image moving and displaying means, and the first graphic image moving and displaying means is a graphic When an image moving operation is performed, the image in the third area including the first area before moving and the second area after moving is read from the video memory to the working memory. Then, the stored lower image before the movement is copied to the first area portion of the working memory, and thereafter, the image of the second area portion of the working memory is saved as the lower image after the movement. , The graphic image is copied to the second area portion of the working memory, and after copying, the image of the third area portion of the working memory is copied to the third area of the video memory, and the image stored in the video memory Is displayed on the display screen, and the second graphic image moving display means stores the video image in the video memory portion that does not overlap the second area after the movement of the first area before the movement when the graphic image is moved. The corresponding lower image is copied, and the stored lower image data corresponding to a portion where the first area before the movement and the second area after the movement overlap and the second area after the movement are copied. , Before moving Generate and store lower image after moving the image data in the video memory portion that does not overlap the first region, thereafter, the second video memory
This is achieved by a graphic image moving display device that copies the graphic image to an area and displays the image stored in the video memory on a display screen. ...
Claim 3

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(A) First Embodiment of the Present Invention (a) Configuration FIG. 1 is a configuration diagram of a first embodiment of the present invention. In the figure, 10
Is an image processor for performing image processing, 20 is a RAM for storing various data, 30 is a mouse, 31 is a mouse interface, 40 is a video memory for storing one screen of bitmap image data generated by the image processor ( VRAM), 50 is a cursor image generation unit for generating a cursor that is moved by a mouse operation at a predetermined position,
Reference numeral 60 denotes a display controller that reads bitmap image data from a video memory by raster scanning and also reads a cursor image from the cursor image generation unit 50 and inputs the cursor image to a display device.
A display device such as T.

In the RAM 20, a graphic image storage unit 21 for storing image data of individual graphic images displayed on the display screen, a lower image storage unit 22 for storing lower image of each graphic image, and a movement display control. A work storage unit 23 for performing image editing operations and a display position data storage unit 24 for storing display position data of each graphic image are provided. The lower image of the graphic image is a lower image displayed at the display position of the graphic image when the graphic image is not present. Therefore, the lower image includes other images when a plurality of images are displayed in a superimposed manner.

(B) Movement display control FIGS. 2 and 3 are explanatory views of movement control according to the first embodiment. When a request to move and display the graphic image GI (FIG. 2) to the dotted line position is generated by operating the mouse 30, the image processing processor 10 causes the image area before the movement (first area) and the image area after the movement (second area). Area) and a third area (FIG. 3).
The image of the inner dotted line of the video memory 40) is read from the video memory 40 to the working storage unit 23. After a while
The processor 10 copies the pre-movement lower image LLI of the graphic image GI stored in the lower image storage unit 22 to the first area portion of the working storage unit 23. By this copying process, the work storage unit 23 stores the image when the graphic image GI does not exist.

Next, the processor 10 saves the image of the second area portion of the working storage unit 23 in the lower image storage unit 22 as the moved lower image LLI 'of the graphic image GI. After saving, the processor 10 writes (copies) the graphic image GI stored in the graphic image storage unit 21 in the second area portion of the working storage unit 23. As described above, the work storage unit 23 stores the image of the third area portion after the graphic image GI is moved. Thereafter, the processor 10 causes the contents of the work storage unit 23 (the third
The image of the area portion) is copied to the third area of the video memory 40, and the moved image is generated in the video memory 40.

Thereafter, the display controller 60 reads the image stored in the video memory 40 by the raster scan method and inputs it to the display device 70, and displays the moved image on the display screen as shown on the right side of FIG. . According to the first embodiment, unlike the conventional method, the image editing work accompanying the movement is not performed on the video memory, and the image editing work is performed on the separately prepared work storage unit 23. It is possible to change the image before moving from the image before moving to the image after moving at once, and it is possible to display the moving graphic image without flicker.

(B) Second Embodiment FIG. 4 is a block diagram of the second embodiment of the present invention.
The same parts as those in the embodiment are designated by the same reference numerals. The difference from the first embodiment is that the working storage unit is not provided. In the first embodiment, since the image editing work associated with the movement is performed on the work storage unit, the flicker can be eliminated. However, in the first embodiment, the working storage unit must be provided, and the third area becomes large when the moving amount of the graphic image per predetermined time becomes large, and a large amount of memory is required in the working storage unit. become. The predetermined time is a rewriting cycle of the graphic image at the time of moving, and the moving amount depends on the speed of the moving operation of the mouse. From the above, the second embodiment eliminates the flicker in the moving display without using the working storage unit.

FIG. 5 is an explanatory view of movement control according to the second embodiment. When a request to move and display the graphic image GI (FIG. 2) to the dotted line position is generated by operating the mouse 30, the image processing processor 10 causes the graphic image GI to move as shown in FIG.
Image area before movement of graphic image GI (first area)
Among them, the corresponding portion LLI ′ of the lower image LLI stored in the lower image storage unit 22 is copied to the video memory portion that does not overlap the moved image area (second area). As a result, as for the graphic image, only the graphic image portion GI ′ of the overlapping portion is stored in the video RAM 40 as shown in FIG. 5 (2).

Then, the processor 10 causes the lower image portion LLI "corresponding to a portion where the first area before movement and the second area after movement overlap with each other, and the first area before movement of the second area after movement. And the image data IM of the video memory portion that does not overlap with the lower image LLI after movement are generated and stored in the lower image storage unit 22. Thereafter, the processor 10
As shown in FIG. 5C, the graphic image stored in the graphic image storage unit 21 is written (copied) in the second area of the video memory 40. As a result, the moved image is generated in the video memory 40 as shown in FIG. Thereafter, the display controller 60 reads the image stored in the video memory 40 by the raster scan method and inputs it to the display device 70, and displays the moved image on the display screen as shown on the right side of FIG.

According to the second embodiment, there is an effect of suppressing flicker without using the working storage section. FIG. 6 shows the second
It is an effect explanatory view of an example. Assuming that the image GI is moved as indicated by the arrow as shown in FIG. 6A, the image of the area D1 that does not overlap the second area after the movement in the first area before the movement is shown in FIG. As shown in (), the graphic image before movement is changed only once to a lower image (background image). Further, the image of the area D2 of the second area after the movement which does not overlap the first area before the movement is changed only once from the background image to the graphic image after the movement as shown in FIG. 9C. Furthermore, the image of the overlapping area D3 in which the first area and the second area overlap is only changed once from the graphic image before movement to the graphic image after movement, as shown in FIG. 9 (d). As described above, 1 is set in each of the areas D1 to D3.
Since the image changes only once, it is possible to suppress the occurrence of flicker. In the second embodiment, as is clear from FIG. 5, the graphic image GI is
There is a moment when only the graphic image portion GI 'is displayed alone, which may enter the eyes of the operator and cause some flickering. However, since the graphic image portion GI 'is a part of the graphic image GI that has been displayed, the flicker can be suppressed considerably.

(C) Third Embodiment As described above, in the first embodiment, the flicker can be completely eliminated, but there is a problem that a large amount of memory is required when the movement amount becomes large, and therefore the second embodiment is performed. In the example, a large amount of memory is unnecessary, but there is a problem that some flicker remains. Therefore, in the third embodiment, the moving display control can be performed by appropriately switching between the first embodiment and the second embodiment in which the used memory amount is reduced. That is, when the moving amount of the graphic image per unit time is small and the overlapping amount of the first and second areas is large, the graphic image is displayed based on the graphic image moving display method (first moving display method) of the first embodiment. When the image movement display is performed and the movement amount is large and the overlapping amount of the first and second regions is small (including the overlapping amount = 0), the graphic image moving display method of the second embodiment (second moving display method) ), The graphic image is moved and displayed. By doing so, the working storage unit 23 in the first embodiment is obtained.
It is possible to suppress the memory amount to 4 times the graphic image size, prevent an increase in the memory amount, and eliminate the flicker by the first moving display method even when the moving amount is small. When the amount of movement is large and the amount of overlap is small, flicker can be eliminated by the second movement display method. Further, when the movement amounts do not overlap significantly, the graphic image portion GI ′ of the overlap portion is
Since (Fig. 5) is not displayed, flicker can be eliminated.

If the first and second regions do not overlap,
The second moving display method has the same moving display as the conventional method of FIG. FIG. 7 is an explanatory diagram for explaining this point. It is explanatory drawing of the 2nd movement display method in 3rd Example, and the difference with FIG. 5 is that the movement amount of the graphic image GI is large, the 1st, 2nd area | region does not overlap, and the lower image of a movement destination is shown. The point is that it is created only from the image data of the video memory portion of the second area. When a request to move and display the graphic image GI (see FIG. 7 (1)) is made by operating the mouse 30, the image processor 10 obtains the movement amount of the graphic image from the mouse interface 31, Based on the amount of movement, the amount of overlap between the first region before movement and the second region after movement is obtained, and it is determined whether the amount of overlap is less than or equal to the set value. In this case, since the movement amounts do not largely overlap, the processor 10 controls the movement display according to the second display method.

First, As shown in FIG. 7 (1), the lower image LLI stored in the lower image storage unit 22 is copied to the video memory portion of the image region (first region) before the movement of the graphic image GI. As a result, as shown in FIG. 7 (2), an image in the absence of the graphic image GI is stored in the video memory 40, and the graphic image GI is not displayed on the display screen. Then, processor 10
Saves the image data of the second area portion of the video memory 40 in the lower image storage unit 22 as the moved lower image.
After that, the processor 10, as shown in FIG.
The graphic image GI stored in the graphic image storage unit 21 is written in the second area of the video memory 40.
As a result, the moved image is generated in the video memory 40 as shown in FIG. 7 (4).

Thereafter, the display controller 60 reads the image stored in the video memory 40 by the raster scan method and inputs it to the display device 70, and displays the moved image on the display screen. As described above, the present invention has been described with reference to the embodiments. However, the present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention does not exclude these.

[0023]

As described above, according to the present invention, unlike the conventional method, the image editing work associated with the movement on the video memory is not performed, but the image editing work is performed on the separately prepared work storage unit. It is possible to change the image before the movement of the display screen from the image after the movement at a time, and therefore, it is possible to perform the moving display of the graphic image without flicker.
According to the present invention, when a moving operation of a graphic image is performed, a corresponding portion of a lower image separately stored in a video memory portion that does not overlap with a second area after movement of the first area before movement is copied. However, after that, since the graphic image is copied to the second area of the video memory and the image stored in the video memory is displayed on the display screen, the flickering in the moving display without using the working storage unit is caused. Can be eliminated.

According to the present invention, the first graphic image moving / displaying means and the second graphic image moving / displaying means have a small movement amount, and the first and second regions overlap with each other when the overlapping amount is large. The graphic image moving display is performed based on the graphic image moving display means, and when the moving amount is large and the overlapping amount of the first and second regions is small, the graphic image moving display is performed based on the second graphic image moving display means. The first graphic image moving display means does not perform image editing work associated with movement on the video memory, but performs image editing work on a separately prepared work storage unit to display the created moving image. The second graphic image moving / displaying means writes and displays in the video memory at one time, and the second graphic image moving / displaying means displays the lower image separately stored in the video memory portion of the first area before moving. Since the moving image is displayed by copying the corresponding portion and then copying the graphic image in the second area of the video memory, it is possible to prevent an increase in the amount of memory in the working storage unit and to move the moving image. Flicker can be eliminated regardless of the amount.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram (Part 1) of the graphic image movement control of the first embodiment.

FIG. 3 is an explanatory diagram (No. 2) of the graphic image movement control of the first embodiment.

FIG. 4 is a configuration diagram of a second embodiment of the present invention.

FIG. 5 is an explanatory diagram of graphic image movement control according to the second embodiment.

FIG. 6 is an explanatory diagram of effects of the second embodiment.

FIG. 7 is an explanatory diagram of a second movement display method in the third embodiment.

FIG. 8 is an explanatory diagram (1) of conventional graphic image movement control.

FIG. 9 is an explanatory diagram (Part 2) of the conventional graphic image movement control.

FIG. 10 is a diagram illustrating a problem of conventional graphic image movement control.

[Explanation of symbols]

 10. Image processor 20. RAM 21. Graphic image storage unit 22. Lower image storage unit 23. Work storage unit 24. Display position data storage unit 30. Mouse 40 .. Video memory (VRAM ) 70..Display device

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G09G 5/38 9377-5H G09G 5/38 A

Claims (3)

[Claims] 1. A graphic image from a first area to a second area.
In the graphic image moving display method of moving to the area of and displaying on the display screen, when there is no graphic image, the lower image displayed at the display position of the graphic image is saved and the graphic image moving operation is performed. When there was, the first before moving
The image of the third area including the area and the second area after the movement is read from the video memory to the working memory, and the stored lower image before the movement is copied to the first area portion of the working memory. After that, the image of the second area portion of the working memory is saved as the lower image after the movement, and then the graphic image is copied to the second area portion of the working memory, and after copying, the third image of the working memory is copied. A graphic image moving display method characterized by copying an image of an area portion to a third area of a video memory and displaying the image stored in the video memory on a display screen. 2. A graphic image from a first area to a second area
In the graphic image moving display method of moving to the area of and displaying on the display screen, when there is no graphic image, the lower image displayed at the display position of the graphic image is saved and the graphic image moving operation is performed. When there was, the first before moving
A corresponding portion of the stored lower image is copied to a video memory portion that does not overlap the second area after the movement, and corresponds to a portion where the first area before the movement and the second area after the movement overlap. The stored lower-order image data and the image data of the video memory portion of the second area after the movement, which does not overlap the first area before the movement, generate and store the lower-order image after the movement. A graphic image moving display method, characterized in that the graphic image is copied to a second area of the video memory and the image stored in the video memory is displayed on a display screen. 3. A graphic image moving display method for moving a graphic image from a first area to a second area and displaying the graphic image on a display screen, and displaying the graphic image at a display position of the graphic image when there is no graphic image. In the first graphic image moving display, when the graphic image moving operation is performed, the lower image to be displayed is saved in the third area including the first area before moving and the second area after moving. The image is read from the video memory to the working memory, the lower image before the movement stored in the first area portion of the working memory is copied, and after that, the image in the second area portion of the working memory is moved. Of the graphic image to the second area portion of the working memory, and after copying, an image of the third area portion of the working memory. The image stored in the third area of the video memory is copied, and the image stored in the video memory is displayed on the display screen. In the second graphic image moving display, when the graphic image moving operation is performed, the image before moving is displayed. A corresponding portion of the stored lower image is copied to a video memory portion that does not overlap the second area after the movement in one area, and corresponds to the portion where the first area before the movement and the second area after the movement overlap. The stored lower image data and the image data of the video memory portion that does not overlap the first region before the movement of the second region after the movement generate and store the lower image after the movement. After that, the graphic image is copied to the second area of the video memory, the image stored in the video memory is displayed on the display screen, and the moving amount is small, and the overlapping amount of the first and second areas is small. Is large, the graphic image moving display is performed based on the first graphic image moving display, and when the moving amount is large and the overlapping amount of the first and second regions is small, the second graphic image moving display is performed. A graphic image moving and displaying method, characterized in that the graphic image moving and displaying is performed.