JP2934041B2 - Redisplay processing control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a re-display processing control method for re-displaying on a screen, and stores a plurality of image data associated with priorities in an image memory in a window area on a display screen. The present invention relates to a redisplay processing control method for reflecting a processing result on a display screen when processing such as arithmetic editing is performed on image data when transferring and superimposed display.

[0002]

2. Description of the Related Art When processing such as arithmetic editing is performed on image data existing in a screen display memory, if the image data is displayed in a window area on a display screen, the image data is displayed. It is necessary to re-transfer to the specified position in the window area and reflect the processing result on the display screen.

Conventionally, at the time of this redisplay processing, after clearing the entire window with the background color of the window, the image data to be displayed in the window is sequentially transferred to a designated position in the window area in accordance with the priority order and redisplayed. I was doing it again.

[0004]

For this reason, even when processing is performed only on certain image data, all areas in the window are cleared with the background color of the window, and then each image data is sequentially re-transferred. Therefore, there is a problem that the redisplay processing takes a long time. In addition, when editing the layout of catalogs and pamphlets, etc., since the editing work such as changing the display position of the image data as the material placed in the window is frequently performed, the background color in the window area must be cleared each time. However, there has been a problem that flicker on the display screen is noticeable.

SUMMARY OF THE INVENTION An object of the present invention is to obtain an area having a lower priority in response to a change in image data and to perform redisplay, thereby enabling quick redisplay and eliminating flicker.

[0006]

Means for solving the problem will be described with reference to FIG. In FIG. 1, the inclusion relation calculation unit 6 refers to the display image list 7 and obtains an inclusion area having a low priority order with respect to a processing target area obtained by editing image data.

[0007] The display image list 7 is a list having priorities of areas displayed in a window on the screen.

[0008]

According to the present invention, as shown in FIG. 1, when the image data is edited or the like, the processing target area edited by the inclusion relation calculation unit 6 is referred to as the display image list 7 and has a lower priority. Is obtained, and redisplayed from the image data of the obtained area. Also, when moving the image displayed in the window on the screen,
By referring to the display image list 7, an area including the area before the movement is obtained, and is displayed again from the image data of this area.

Therefore, an area having a low priority order to be included in response to a change in image data or the like is obtained, and redisplay processing is performed from this area, and a necessary minimum redisplay of the area displayed in the window on the screen is performed. Can be performed quickly, and the flicker caused by clearing of the background color that occurs at the time of editing a catalog can be eliminated.

[0010]

Next, the structure and operation of an embodiment of the present invention will be sequentially described in detail with reference to FIGS. In FIG. 1, a host computer 1 is a host that instructs processing of an image displayed in a window on a screen.

The image control device 2 includes a host computer 1
Performs image processing in response to an image processing instruction from the MPU 3, the arithmetic processing unit 4, the image memory 5,
It includes an inclusion relation calculation unit 6, a display image list 7, a light control unit 8, and the like. The MPU 3 is a microprocessor, and instructs the arithmetic processing unit 4 to perform arithmetic processing on the corresponding image data in the image memory 5 in response to an instruction for arithmetic processing of image data from the host computer 1. The inclusion relation calculation unit 6 provided in the MPU 3 calculates the lower area including the edited area with reference to the display image list 7, and the image of the area in the higher direction from the included lower area. It controls the write control unit 8 to transfer data from the image memory 5 to the image display memory 11.

The arithmetic processing unit 4 performs image processing (editing) on the image memory 5 in response to an instruction from the MPU 3. The image memory 5 holds image data to be displayed in a window on the screen of the display 12. The inclusion relation calculation unit 6 refers to the display image list 7 and obtains a lower area including the area of the edited image data (described later with reference to FIG. 2).

The display image list 7 is a link of information on the display priority order of an area to be displayed in a window on the screen of the display 12 (see (c) in FIG. 3).
The write control unit 8 sequentially transfers the image data from the image memory 5 to the image display memory 11 in ascending order of priority, writes the image data, and reflects the result calculated by the calculation processing unit 4 on a window on the screen of the display 12. Things.

The image display device 9 comprises an image display memory 11 for expanding and storing the transferred image, a display 12 for displaying the image, and the like. Next, the operation of the configuration of FIG. 1 will be described in detail according to the order shown in the flowchart of FIG. In FIG. 2, S1
Calculates a processing target area. This means that the arithmetic processing unit 4 obtains an area (processing target area) of the image data in the image memory 5 on which the editing processing has been performed (the obtained area is defined as the area).

In step S2, a lower priority area is obtained from the display image list 7. In this case, an area one level lower than the priority of the processing target area obtained in S1 is obtained from the display image list 7 as shown in (c) of FIG. 3 (this obtained area is defined as an area). In S3, it is determined whether or not the area is completely included in the area (whether or not the area is included in the upper left and lower right coordinates). In the case of YES, an area including the processing target area has been determined, and the process proceeds to S6. N
In the case of O, in S4, an area having the next lower priority is obtained from the display image list (this obtained area is set as an area), and a combined area of the area with the area in S5 is obtained (this obtained area is obtained). The area is updated to the area of), and S3 is repeated to obtain a lower area completely including the processing target area.

By the above processing, a region completely including the region to be processed, which has been edited, is obtained. S
6 redraws the image of the area. This means that the image in the area designated by the light control unit 8 in FIG. 1 is read out from the image memory 5 and transferred to the image display memory 11 for drawing. Display again.

In S7, it is determined whether or not the display image list 7 is the end (highest priority). If yes,
The display is sequentially re-displayed in the processing target area from the included area determined by YES in S3, and the processing ends. On the other hand, in the case of NO, in S8, the image one level higher in the priority order is redrawn according to the display image list, and S7 is repeated. By the above processing, by sequentially transferring the image data of the included area, drawing it on the image display memory 11 and redisplaying it on the display 12, it is possible to quickly redisplay it with the minimum necessary redisplay processing. Becomes

Next, a specific example will be described with reference to FIG. FIG. 3A is an explanatory diagram of redisplay at the time of arithmetic processing on image data. Here, there is no priority of display. (1) The arithmetic processing is performed on the area (1) and the area is changed. (2) As an area including the area (processing area) changed in (1), the upper left coordinates in the display image list 7
Referring to the lower right coordinates, as a lower area that completely encompasses,
Here, the next lower area is obtained.

(3) The image data of the area obtained in (2) is redrawn and displayed again. (4) Next, the next higher level area and the next higher level area are sequentially redrawn and redisplayed. As described above, a region that completely includes the processing target region (here) in which the image data has been edited or the like is obtained (here), and from this region to the region of the highest order (here,...) By performing re-drawing and re-displaying, it is possible to perform re-displaying at a high speed with a minimum required re-drawing.

Next, according to the order shown in the flowchart of FIG. 4, the redisplay of the image data when the display area is moved within the window will be described with reference to FIG. In FIG. 4, S11 saves the upper left and lower right coordinates of the area before the movement and registers the area after the movement in the display image list. This means that the upper left coordinate and the lower right coordinate of the area before the movement shown in FIG. 3B are stored, and the upper left coordinate and the lower right coordinate of the area after the movement are registered in the corresponding priority position (FIG. (C)).

In step S12, an included area is found based on the area before the movement. In this case, '' is found here as a region that completely covers the region before the movement shown in (b) of FIG. 3 with reference to the display image list 7 (see S1 to S5 of FIG. 2). In step S13, a redrawing process is performed.
This is because the redrawing is performed sequentially from the completely encompassed area (here, the area ″ ′) found in S12, the area before the movement is erased, and the image data of the area after the movement is drawn. Is displayed.

According to the above processing, when moving image data, it is possible to erase the area before moving and redraw and redisplay the minimum necessary area for drawing the image data in the area after moving. Become. FIG. 3C shows a display image list. The display image list 7 links the priorities of regions (upper left and lower right coordinates) to be displayed in a window on the screen of the display 12. With reference to the display image list 7, an area completely including the processing target area is obtained (S1 to S in FIG. 2).
5).

[0023]

As described above, according to the present invention,
The system uses a configuration in which a low-priority area to be included in response to changes in image data, etc., and redisplay processing is performed, so that the minimum necessary area of the area displayed in the window on the screen is The re-display may be performed, and the re-display can be performed quickly, and the flicker caused by clearing the background color that occurs at the time of editing the catalog can be eliminated.

[Brief description of the drawings]

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

FIG. 2 is a flowchart (part 1) for explaining the operation of the present invention.

FIG. 3 is an explanatory view of a specific example of the present invention.

FIG. 4 is a flowchart (part 2) for explaining the operation of the present invention.

[Explanation of symbols]

 1: host computer 2: image control device 3: MPU 4: arithmetic processing unit 5: image memory 6: inclusion relation calculation unit 7: display image list 8: light control unit 9: image display device 11: image display memory 12: display

Claims (2)

(57) [Claims] In a re-display processing control method for re-displaying on a screen, a display image list having a priority order of display of a plurality of areas displayed in a window on the screen and image data are edited. For the processing target area, for example, refer to the display image list and display the processing
The area that includes the target area is determined, and the determined priority
Means for redisplaying the image data of the area from low to high in the window. 2. An image displayed in a window on a screen
When moving in the region, the means the determined seek region encompassing region before the movement by referring to the display image list
2. The redisplay processing control method according to claim 1, wherein the image data of the area is redisplayed from a low priority to a high priority .