JPH1165813A - Plotting processor, plotting processing method and storage medium recording plotting program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plotting processor realizing the partial updating of information and preventing the occurrence of the delay of a plotting processing and to provide a storage medium recording a plotting processing program. SOLUTION: When the position of additional information which momentarily changes is updated, an update source background transfer part 34 transfers a part corresponding to a position before additional information is updated to a dynamic plotting area 5 in background information preserved in a background plotting area 4. An update source plotting execution part 35 plots again plotting data of additional information in the transferred part of the dynamic plotting area 5. An update destination plotting execution part)37 plots plotting data of additional information in the area part of a position after additional information in the dynamic plotting area 5 is updated. When the updating of plotting data of the dynamic plotting area 5 completes, a display information transfer part 38 transfers only plotting data of the updated area part to a display device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing processing apparatus, a drawing processing method, and a recording medium storing a drawing program in a car navigation system or the like.

[0002]

2. Description of the Related Art In recent years, a car navigation system, which has been rapidly spread, has a computer mounted on a car, reads map data as a background using a CD-ROM or radio waves, and displays a current position on a display screen. This is a system aiming at displaying a message. In this system, a drawing process for reading data that changes every moment and updating the display on the display screen in response to the data is required.

A conventional drawing processing apparatus is disclosed in Japanese Patent Laid-Open No. 6-149.
As disclosed in Japanese Patent Application Publication No. 533, two buffers are prepared, and control is performed such that while data is being written into one buffer, the contents of the other buffer are transferred to the display screen.

The configuration of a conventional drawing processing apparatus will be described with reference to FIG. FIG. 5 is a block diagram showing a configuration of a conventional drawing processing apparatus.

[0005] The drawing means 501 writes data to either the frame buffer 502 or 503 based on the input data. The determination of which buffer is to be written is based on an instruction from the buffer / flag holding unit 504. While the drawing means 501 is writing data to one buffer, the contents of the other buffer are displayed on the display device 505.
And display the drawing data.

[0006]

However, in the above-described conventional drawing processing apparatus and method, all information must be redrawn even when the drawing processing is performed by partially updating the information. For this reason, in a computer used in the drawing processing apparatus, unless the processing speed is high, the demand for updating a large amount of information in real time cannot be satisfied, and a delay may occur in the drawing processing.

The present invention has been made in view of the above circumstances, and provides a drawing processing apparatus and a recording medium on which a drawing processing program is recorded, which enables partial updating of information and prevents occurrence of delay in drawing processing. The purpose is to do.

[0008]

In order to solve the above-mentioned problems, the present invention takes the following measures.

According to a first aspect of the present invention, there is provided a receiving means for receiving additional information, a dynamic drawing area for storing drawing data of additional information and background information, and displaying the drawing data stored in the dynamic drawing area. And a drawing unit that redraws only a portion of the saved drawing data that needs to be redrawn in the dynamic drawing area when the position of the additional information is updated. .

According to a fifth aspect of the present invention, the drawing data of the additional information and the background information is stored in the dynamic drawing area, and when the position of the received additional information is updated, only the drawing data of the portion that needs to be redrawn is stored. Is redrawn in the dynamic drawing area, and the drawing data is displayed.

In the present invention, the additional information refers to information that changes with time, such as the position of the own vehicle in a car navigation system, with respect to background information that does not change over time.

With these configurations, when the drawing data is partially updated, only the area that needs to be redrawn is updated, so that the drawing process can be performed at high speed and the delay in the drawing process can be suppressed. Can be.

According to a second aspect of the present invention, in the first aspect of the present invention, when a part of the dynamic drawing area is redrawn, the display information transfer means stores the drawing stored in the dynamic drawing area. Only the redrawn portion of the data is transferred to the display device.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, when a part of the dynamic drawing area is redrawn, the drawing data stored in the dynamic drawing area is redrawn. A method is adopted in which only the part that has been transferred is transferred to the display device.

With these configurations, when the drawing data is partially updated, only the updated area is transferred to the display device, so that the drawing process can be performed at high speed, and the delay in the drawing process can be reduced. Can be suppressed.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the background drawing area for storing only the drawing data of the background information and the position of the additional information are updated when the position of the additional information is updated. And a background transfer unit for transferring only a portion corresponding to the position of the additional information before update to the dynamic drawing area in the drawn data of the background information, wherein the drawing unit includes: If there is other additional information in the portion, the drawing data of the additional information is redrawn in the dynamic drawing area.

According to a seventh aspect of the present invention, in the fifth or sixth aspect of the present invention, the drawing data of the background information is stored in the background drawing area, and is stored when the position of the additional information is updated. Only the portion of the drawing data of the background information corresponding to the position of the additional information before the update is transferred to the dynamic drawing region, and if there is other additional information in the transferred drawing region portion, the dynamic drawing region First, a method of redrawing the drawing data of the additional information is adopted.

With this configuration, by transferring only the necessary portion from the drawing data of the background information being stored, the original drawing data of the updated additional information can be erased, so that the drawing process can be performed at high speed. it can.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein each additional information has priority as information, and the drawing means draws the overlapping additional information. When redrawing data, a configuration is used in which the priorities are considered.

According to this configuration, the additional information can be drawn by judging the priority order in advance, so that the drawing process can be performed at high speed even when drawing the drawing data of the overlapping additional information.

The invention according to claim 8 relates to a machine-readable recording medium on which a drawing program is recorded. When the position of the received additional information is updated, the computer stores the information in a dynamic drawing area. A configuration is adopted in which a drawing procedure for redrawing only a necessary portion of the drawn data and a transfer procedure for transferring only the redrawn drawing data to the display device are performed.

With this configuration, by executing a drawing program on a computer, it is possible to update input information in real time and to update a large amount of information at high speed.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration of a drawing processing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the drawing processing apparatus comprises a GP
A GPS receiver 1 that receives S radio waves and creates location information;
A RAM 2 used as a work area for data processing, a drawing control unit 3 for performing drawing control of each unit, a background drawing area 4 for drawing only background information, and a dynamic drawing area 5 for drawing background information and additional information. And a display device 6 for displaying information drawn in the dynamic drawing area.

The GPS receiving section 1 has a GPS antenna and a GP
The position information of the additional information to be drawn on the background information is created. Note that information other than the position information related to the additional information is input from an external input device such as a keyboard, a tablet device, or another computer (not shown).

The RAM 2 has an additional information table 21 in which additional information is registered, and a drawing range information table 22 in which drawing range information is registered. FIG. 2 is a schematic diagram illustrating an example of the additional information table 21 according to the present embodiment. As shown in FIG. 2, each of the additional information numbers a to d corresponds to the information of the drawing symbol, the drawing position, and the priority.

The drawing control means 3 includes a signal input unit 31, an update necessity determining unit 32, an update source drawing instruction unit 33, an update source background transfer unit 34, an update source drawing execution unit 35, an update destination drawing unit It has an instruction unit 36, an update destination drawing execution unit 37, and a display information transfer unit 38.

The signal input section 31 receives the position information of the additional information created by the GPS receiving section 1 and updates the information.
2 and the update destination drawing instruction unit 36.

The update necessity determining unit 32 determines whether or not the additional information has been updated based on the signal input from the signal input unit 31 and the position of the additional information registered in the additional information table 21.

When the position of the additional information is updated, the update source drawing instructing unit 33 determines the corresponding area portion of the background drawing area 4 and the dynamic drawing area 5 from the position of the additional information registered in the additional information table. Judge, and instruct the update source background transfer unit 34 and the update source drawing execution unit 35 on the area.

The update source background transfer unit 34 transfers the drawing data corresponding to the area specified by the update source drawing instruction unit 33 from the background drawing area 4 to the dynamic drawing area 5.

When additional information is present in the area of the dynamic drawing area 5 specified by the update source drawing instructing section 34, the update source drawing execution section 35 After determining the order, the drawing data of the additional information is drawn again.

When the additional information is updated, the update destination drawing instructing section 36 determines a corresponding area portion of the dynamic drawing area 5 from the position of the additional information from the signal input section 31, and updates the additional destination information. An area part is designated to 37. Further, the position of the additional information written in the additional information table 21 is updated.

The update destination drawing execution unit 37 draws the drawing data of the additional information corresponding to the area of the dynamic drawing area 5 specified by the update destination drawing instruction unit 36 after judging the priority order.

When the update of the drawing data of the dynamic drawing area 5 is completed, the display information transfer section 38 transfers only the drawing data of the updated area to the display device 6.

Next, the drawing state of each drawing area and display screen in the present embodiment will be described with reference to FIG. 3, using a map as background information and a mark as additional information as an example.
FIG. 3 is a drawing state diagram showing an example of each drawing area and display screen in the present embodiment.

The mark a is a target mark to be updated, and marks other than a are other marks whose positions are not updated. The background drawing area draws a map as background information,
The dynamic drawing area draws the same size and the same information as the background drawing area, and further draws a mark thereon as additional information.

In FIG. 3, the drawing area 301 shows the initial state of the dynamic drawing area, the drawing area 302 shows the initial state of the background drawing area, and the screen 303 shows the initial state of the screen of the display device.

When the position of the target mark a in the additional information is updated, the partial background information 311 corresponding to the position before the update of the target mark a is transferred from the background drawing area to the dynamic drawing area, and the target mark a is updated. The image is erased and the dynamic drawing area becomes the drawing area 304.

Next, other marks in the area erased by the transfer of the partial background information are redrawn in consideration of the drawing priority of each mark, and the dynamic drawing area becomes the drawing area 305.

Next, at the updated position of the mark a, the mark a and another mark overlapping the mark a are drawn in consideration of the drawing priority of each mark, and the dynamic drawing area becomes the drawing area 306. .

When the drawing is completed, only the partial information 311, 312 in which the dynamic drawing area has been updated is transferred to the screen of the display device. The screen of the display device is the screen 307.

Next, the operation of the drawing control means 3 in this embodiment will be described with reference to FIG. FIG. 4 is a flowchart showing a flow of the operation of the drawing control unit 3 in the present embodiment.

First, the GPS receiver 1 receives the G
Position information of additional information is created from the PS radio wave, and is input to the signal input unit 31 (S401).

Next, the update necessity judging section 32 compares the position information of the additional information in the additional information table 21 with the signal input section 3.
1 is compared with the position information of the additional information sent, and it is determined whether or not the position of the additional information has been updated (S40).
2). If the position of the additional information has not changed, the following processing is not performed because the update processing is not necessary.

If the position of the input additional information has changed, the updated additional information is already stored in the dynamic drawing area by the update source drawing instructing unit 33 from the drawing range information extracted from the drawing range information table 22. It is determined whether or not drawing has been completed in S5 (S403). If the input additional information is not drawn, the following processing from S404 to S407 is not performed.

If the position of the input additional information has already been drawn, the update source drawing instructing unit 33 instructs the update source background transfer unit 34 of an area corresponding to the position of the additional information before update. You. Then, the drawing data of the corresponding area portion is transferred from the background drawing area 4 to the dynamic update area 5 by the update source background transfer unit 34 (S404).

By transferring only necessary portions from the drawing data of the background information being stored and erasing the additional information, the drawing process can be performed at high speed.

Next, the update source drawing instructing section 33 determines from the position information of the additional information in the additional information table 21 whether or not there is other additional information in the range of the transferred background information drawing data. (S405).

If there is other additional information, the update source drawing instructing unit 33 determines the priority from the priority information of the additional information in the additional information table 21 (S406). On the other hand, redrawing of the drawing data of the additional information to be drawn is instructed. The additional information to be drawn is redrawn by the update source drawing execution unit 35 in consideration of the priority order (S407).

Next, based on the input information and the drawing range information retrieved from the drawing range information table 22, the position of the updated additional information is within the range of the dynamic drawing area 5 by the update destination drawing instructing section 36. It is determined whether or not this is the case (S408). If the position of the updated additional information is not within the range of the dynamic drawing area 5, the following processing from S409 to S412 is not performed.

When the updated additional information is within the range of the dynamic drawing area 5, the update destination drawing instructing unit 36 determines another additional information based on the input information and the position information of the additional information in the additional information table 21. It is determined whether or not the information overlaps (S40)
9).

When the updated additional information overlaps with other additional information, the update destination drawing instruction unit 36 gives priority to the additional information included in the target range over the priority information of the additional information in the additional information table 21. The order is determined (S410), and the update destination drawing execution unit 37 is instructed to redraw the drawing data of the additional information to be drawn, including the updated additional information. The additional information to be drawn is redrawn by the update destination drawing execution unit 37 in consideration of the priority (S41).
1).

If there is no additional information other than the updated additional information in the update destination area, the update destination drawing instruction unit 36 sends the update destination drawing execution unit 37 only the drawing data of the updated additional information. Redraw is instructed. The updated additional information is redrawn by the update destination drawing execution unit 37 (S412).

When the update processing of the information of the dynamic drawing area 5 is completed, only the drawing data of the update area in the dynamic drawing area 5 is transferred to the display screen by the display information transfer section 38 (S413).

As described above, the drawing processing apparatus according to the present invention updates drawing data only in an area where redrawing is required, so that drawing processing can be performed at high speed.
It is possible to suppress the occurrence of delay in the drawing process.

In the present invention, two drawing areas such as the background drawing area 4 and the dynamic drawing area 5 are prepared. In particular, depending on the update information, it is also possible to divide the drawing area into a plurality of pieces according to information such as information updated in real time and information not updated for a long time.

[0058]

As described above, according to the present invention, when information is partially updated, unnecessary drawing processing is not performed, drawing processing is performed at high speed, and drawing processing that prevents delays in drawing processing is prevented. It is possible to provide a recording medium in which an apparatus and a drawing processing program are recorded.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a drawing processing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of an additional information table according to the embodiment.

FIG. 3 is a drawing state diagram showing an example of each drawing area and a display screen in the present embodiment.

FIG. 4 is a flowchart showing a flow of an operation of a drawing control unit according to the embodiment.

FIG. 5 is a block diagram showing a configuration of a conventional drawing processing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 GPS receiving part 2 RAM 3 Drawing control means 4 Background drawing area 5 Dynamic drawing area 6 Display device 21 Additional information table 22 Drawing range table 31 Signal input part 32 Update necessity judging part 33 Update source drawing instruction part 34 Update source background Transfer unit 35 Update source drawing execution unit 36 Update destination drawing instruction unit 37 Update destination drawing execution unit 38 Display information transfer unit

Claims (8)

[Claims] 1. A receiving means for receiving additional information, a dynamic drawing area for storing drawing data of additional information and background information, and, when the position of the additional information is updated, among the stored drawing data, Drawing means for redrawing only a portion requiring redrawing in the dynamic drawing area, a display device for displaying drawing data, and display information for transferring the drawing data stored in the dynamic drawing area to the display device A drawing processing apparatus comprising: a transfer unit. 2. A display information transfer unit, wherein when a part of a dynamic drawing area is redrawn, only the redrawn part of the drawing data stored in the dynamic drawing area is transferred to a display device. 2. The drawing processing apparatus according to claim 1, wherein: 3. A background drawing area for storing only the drawing data of the background information, and when the position of the additional information is updated, the background drawing area corresponds to the position of the additional information before the update in the stored drawing data of the background information. Background transfer means for transferring only the portion to the dynamic drawing area, and if there is other additional information in the transferred drawing area portion, the drawing data of the additional information is stored in the dynamic drawing area. 3. The drawing processing device according to claim 1, wherein the drawing processing is performed again. 4. The apparatus according to claim 1, wherein each additional information has a priority as information, and the drawing unit considers the priority when redrawing the drawing data of the overlapping additional information. 3. The drawing processing apparatus according to any one of 3. 5. The drawing data of additional information and background information is stored in a dynamic drawing area, and when the position of the received additional information is updated, only the drawing data of a portion that needs to be redrawn is stored in the dynamic drawing area. A drawing processing method, characterized by redrawing a drawing and displaying drawing data. 6. When a part of the dynamic drawing area is redrawn, only the redrawn part of the drawing data stored in the dynamic drawing area is transferred to the display device. 5. The drawing processing method according to 5. 7. A drawing data of background information is stored in a background drawing area, and when a position of the additional information is updated, a portion of the stored drawing data of the background information corresponding to the position of the additional information before the update. 6. The method according to claim 5, further comprising: transferring only the additional information to the dynamic drawing area, and redrawing the drawing data of the additional information in the dynamic drawing area if there is other additional information in the transferred drawing area. The drawing processing method according to claim 6. 8. A drawing procedure for causing the computer to redraw only a necessary portion of the drawing data stored in the dynamic drawing area when the position of the received additional information is updated, and a redrawn drawing A machine-readable recording medium storing a drawing program for executing a transfer procedure for transferring only data to a display device.