JPH04148285A - Clip process system in graphic process system - Google Patents

Abstract

PURPOSE:To execute a clip process as a whole graphic process system efficiently by adopting a clip frame processible by a graphic display device as the reference of the execution judgement of a clip process simulate means when displaying graphic data. CONSTITUTION:A graphic process system 20 calls out a graphic data display area judging means 24 to the coordinate-transformed graphic data. The graphic data display area judging means 24 judges whether simulating the clip process or not in the graphic process system 20 before executing a clip process function in a graphic display device 30. In case having judged to simulate the clip process, a graphic data transfer means 26 is called out after calling a clip process simulate means 25, and in case having judged not to simulate the clip process, the graphic data transfer means 26 is called out. Thus, the performance of the clip process as the whole graphic process system 20 including the graphic display device 30 is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a clip processing method in a graphic processing system, and in particular to a process of deleting graphic data outside a specified area (hereinafter referred to as device clip frame). below,
The present invention relates to a clip processing method in a graphic processing system having a graphic display device that performs display processing of graphic data while performing clip processing.

[Conventional technology]

For example, as shown in FIG. 6, the clipping frame includes a limp frame 80, which is the maximum area that can be processed by the clipping function of the graphic display device. User specified clip frame 81 specified by the user. There is a window clip frame 83 specified by the window stem. Note that in FIG. 6, reference numeral 82 indicates a display screen.

When fishing on a boat, the clip frame 80 that can be processed by the graphic display device has certain specific values (coordinates), and the user-designated clip frame 81 can take any value (coordinates). The window clip frame 83 can also take any value (coordinates), but in a graphics processing system it is assumed that the window clip frame 83 is always included within the clip frame 80 that can be processed by the graphics display device. .

Conventionally, in graphic processing systems, user-specified clip frames 8
If there is a registration request of 1, the user-specified clip frame 8
1 was registered in the clip frame management table, and at the same time, a window clip frame 83 determined by the window system was registered in the graphic display device as a device clip frame. Specifically, as shown in FIG. 4, the clip frame registration means of the conventional isomorphic processing system, when there is a request to register a user-specified clip frame 81 from an application program,
First, the user-specified clip frame 81 is registered in the clip frame management table (step 560), and then the clip frame registration means specifies the clip frame of the graphic display device as the device clip frame, using the window clip frame 83 specified by the window system. If the parameter is registered (step 561), the process ends.

In addition, in conventional graphic processing systems, when there is a request to display graphic data from an application program, the display area of the coordinate-converted graphic data is divided between the clip frame 80 that can be processed by the graphic display device and the clip frame specified by the user. 8
1, and performs the clipping process of the graphic display device. Before executing the function, it is determined whether or not to execute the clip processing simulating means of the graphics processing system. Specifically, when a graphic data display request is received from an application program, a conventional graphic processing system calls a graphic data conversion processing means for the graphic data sent from the application program. The graphic data conversion processing means executes processing such as coordinate transformation on the graphic data.Next, the graphic processing system calls the graphic data display area determination means.The graphic data display area determination means is as shown in FIG. As shown in , one of the graphic data converted by the graphic data conversion processing means is read (step 570), and the display area of the graphic data is managed in a clip frame 80 and a clip frame management table that can be processed by the graphic display device. User specified clip frame 8
1 (step 571).

If the graphic data display area does not exist within the intersection area, the graphic data display area determination means calls the clip processing simulating means (step 572), and then calls the graphic data transfer means (step 573). If the data display area exists within the intersection area, the graphic data display area determination means calls the graphic data transfer means (stennob 373), and then the graphic data display area determination means transfers the coordinate-transformed It is checked whether the data still exists (step 574), and if the data still exists, the control is returned to step S70 and one of the next graphic data is read.In step S74, the coordinate-transformed graphic data is present. If not, the graphic data display area determining means ends the process.

By the way, the clip processing simulating means is for simulating the clip processing function of the graphic display device in software and clips the graphic data using the clip frame 80 that can be processed by the graphic display device. Processing is much slower than the functionality.

[Problem to be solved by the invention]

In the clip processing method in the conventional graphic processing system described above, when there is a request to display graphic data from an application program, the display area of the coordinate-converted graphic data is divided into a clip frame that can be processed by the graphic display device and a user-specified display area. Since it is determined whether or not to execute the clip processing simulation means based on whether or not the clipping frame is included in the intersecting area, if the intersecting area is small, the clipping process of the graphic display device is not executed. The clip processing simulator is often called before the function is executed, and the clip processing simulator is much slower in processing than the clip processing function, so the graphics processing system as a whole including the graphics display device is This has the disadvantage that the efficiency of clip processing is reduced.

In view of the above-mentioned points, an object of the present invention is to reduce the number of executions of a clip processing simulating means for simulating the clip processing function of a graphic display device in a graphic processing system, thereby improving the overall graphic processing system including the graphic display device. An object of the present invention is to provide a clip processing method in a graphic processing system that improves the performance of clip processing.

[Means to solve the problem]

The clip processing method in the graphic processing system of the present invention is a graphic display bag that performs display processing of graphic data while performing clip processing of graphic data! In a graphics processing system with a clip frame registration means for registering in the graphic display device as a graphic data display device; a graphic data conversion processing device for performing coordinate conversion processing of graphic data when there is a request to display graphic data; and a clip processing function for simulating the clip processing function of the graphic display device. clip processing simulating means for clipping graphic data with a clip frame that can be processed by the graphic display device, graphic data transfer means for transferring the graphic data to the graphic display device, and coordinate transformation by the graphic data conversion processing means. It is determined whether the display area of the graphic data is within the clip frame that can be processed by the graphic display device, and if the display area of the graphic data is not within the clip frame that can be processed by the graphic display device, the above-mentioned A graphic data display area that calls the graphic data transfer means after calling the clip processing simulating means, and calls the graphic data transfer means when the display area of the graphic data exists within a clip frame that can be processed by the graphic display device. and a determination means.

[Effect]

In the clip processing method in the graphic processing system of the present invention, when there is a request to register a user-specified clip frame, the clip frame registration means registers the user-specified clip frame in the clip frame management table, and combines the user-specified clip frame with the window. The intersecting area with the clip frame is registered in the graphic display device as a device clip frame, the graphic data conversion processing means performs coordinate conversion processing of the graphic data when there is a request to display graphic data, and the clip processing simulating means The clip processing function of the display device is simulated, the graphic data is clipped using a clip frame that can be processed by the graphic display device, the graphic data transfer means transfers the graphic data to the graphic display device, and the graphic data display area determination means Determining whether the display area of the graphic data whose coordinates have been transformed by the data conversion processing means exists within a clip frame that can be processed by the graphic display device;
If the graphic data display area does not exist within the clipping frame that can be processed by the graphic display device, the graphic data transfer device is called after calling the clip processing simulator, and the graphic data display area can be processed by the graphic display device. If it exists within a clip frame, call the graphic data transfer means.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a graphic processing system 20 to which a clip processing method according to an embodiment of the present invention is applied. This graphic processing system 20 is connected to an ablication program 10 and a graphic display device 30, and includes a clip frame registration means 21, a clip frame management table 22, a graphic data conversion processing means 23, and a graphic data display area. It is configured to include a determining means 24, a clip processing simulating means 25, and a graphic data transferring means 26.

Referring to FIG. 2, the processing of the clip frame registration means 21 includes a user specified clip frame registration step S40, an intersection area calculation step S41, and an intersection area registration step S43.
It consists of

Referring to FIG. 3, the graphic data display area determining means 24
This process consists of a graphic data reading step S50, a graphic data display area determination step S51, a clip processing simulating means calling step S52, a graphic data transfer means calling step S53, and a graphic data existence determining step S54. .

Next, the operation of the crimp processing method in the graphic processing system of this embodiment configured as described above will be explained.

When there is a request to register a user-specified clip frame 81 from the application program 10, the graphic processing system 2
0 calls the clip frame registration means 21.

The clip frame registration means 21 updates the contents of the clip frame management table 22 and registers the device clip frame in the graphic display device 30. Specifically, the clip frame registration means 21 updates the contents of the clip frame management table 22 and registers the device clip frame in the graphic display device 30. If there is a request for registration of frame 81, user specified clip frame 8
1 in the clip frame management table 22 (step 540
), next, the clip frame registration means 21 calculates the intersection μ area between the user specified clip frame 81 and the window clip frame 83 specified by the window system (step 341).
), register this intersection area as a device clip frame in the clip frame specification parameter of the graphic display device 30.Step 5
42), the process ends.

When there is a request to display graphic data from the application program 10, the graphic processing system 20 first calls the graphic data conversion processing means 23.

The graphic data conversion processing means 23 executes coordinate conversion processing and the like on the graphic data.

Next, the graphic processing system 20 calls the graphic data display area determining means 24 for the coordinate-transformed graphic data.

The graphic data display area determining means 24 includes a graphic display bag 230
Before executing the clip processing function, it is determined whether clip processing is to be simulated in the graphic processing system 20, and if it is determined that the clip processing is to be simulated, the graphic data is transferred after calling the clip processing simulating means 25. If it is determined that the crimp processing is not to be simulated, the graphic data transfer means 26 is called.More specifically, the graphic data display area determining means 24 converts the coordinates of the graphic data by the graphic data conversion processing means 23. (Step 5)
50), it is determined whether the display area of the graphic data exists within the clip frame 80 that can be processed by the graphic display device (
Step 551).

If the display area of the graphic data does not exist within the clip frame 80 that can be processed by the graphic display device, the graphic data display area determining means 24 uses the clip processing simulating means 25
(step 552), calls the graphic data transfer means 26 (step 553), and if the graphic data display area is within the clip frame 80 that can be processed by the graphic display device, the graphic data display area is The determination means 24 calls the graphic data transfer means 26 (step 553).
)0 Next, the graphic data display area determining means 24 checks whether the coordinate-transformed graphic data still exists (step 554), and if it still exists, the process proceeds to step S5.
In step 354, where the control is returned to 0 and the next piece of graphic data is read, if the coordinate-converted graphic data no longer exists, the graphic data display area determining means 24:
Finish the process.

The clip processing simulating means 25 includes the graphic display device 3
The clip processing function of 0 is simulated by software, and clip processing of graphic data is executed using a clip frame 80 that can be processed by the graphic display device.

The graphic data transfer means 26 transfers the graphic data sent from the graphic data display area determining means 24 to the graphic display device 30.
Transfer to.

Finally, the graphic display device 30 clips the received graphic data using the device clip frame registered by the clip frame registration means 21 (the intersection area of the user-specified clip frame 81 and the window clip frame 83). Display processing of graphic data is performed while executing processing functions.

In this way, in this embodiment, the graphic data display area determining means 24 determines the graphic data display area (step 5).
51), in place of the intersection area between the clip frame 80 that can be processed by the graphic processing device used in the conventional graphic processing system and the user-specified window frame 81, a clip frame that can be processed by the graphic display device. By employing 80, the area for satisfying the conditions for determining the graphic data display area (step 551) becomes wider, thereby reducing the number of times the clip processing simulator 25 is called compared to the conventional clip processing method.

The clip processing simulating means 25 includes the graphic display device 3
Since the processing is much slower than the clip processing function of 0,
By reducing the number of times the clip processing simulator 25 is called, the performance of the clip processing as a whole of the graphic processing system 20 including the graphic display device 30 is improved.

〔Effect of the invention〕

As described above, the present invention provides a graphic processing system having a graphic display device that performs display processing of graphic data while performing clip processing of graphic data. By registering the clip frame as a frame in the graphic display device and using the clip frame that can be processed by the graphic display device when displaying graphic data as the criterion for execution judgment of the clip processing simulator, clip processing simulation in the graphic processing system can be performed. This has the effect of reducing the number of times the clipping means is executed as much as possible, thereby making it possible to efficiently perform the clipping process in the entire graphics processing system including the graphics display device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a graphic processing system to which a clip processing method according to an embodiment of the present invention is applied; FIG. 2 is a flow chart showing an example of processing by the clip frame registration means in FIG. 1; 3 is a flowchart showing an example of processing by the graphic data display area determination means in FIG. 1, FIG. 4 is a flowchart showing an example of processing by the conventional clip frame registration means, and FIG. 5 is a flowchart showing an example of the processing by the conventional graphic data display area determination means. FIG. 6 is a diagram illustrating various clip frames. In the figure, 10. Abbreviation program, 20. Graphic processing system, 21. Clip frame registration means, 22. Clip frame management table, 23. Graphic data conversion processing means, 24. Graphic data display. Area determination means, 25, 26, 30, 80, 81, 82, 83, ・Clip processing simulation means, ・Graphic data transfer means, ・Graphic display device, ・Clip frame that can be processed by the graphic display device, ・User Specified clip frame: ・Display screen, ・Window clip frame.

Claims (1)

[Scope of Claims] In a graphic processing system having a graphic display device that displays graphic data while performing clip processing of graphic data, when a request to register a user-specified clip frame is received, the user-specified clip frame is registered. Clip frame registration means registers in a clip frame management table and registers the intersecting area of the user-specified clip frame and the window clip frame in the graphic display device as a device clip frame; a graphic data conversion processing means that performs coordinate conversion processing of the graphic data; a clip processing simulator that simulates the clip processing function of the graphic display device and clips the graphic data with a clip frame that can be processed by the graphic display device; a graphic data transfer means for transferring the graphic data to the graphic display device; If the display area of the graphic data does not exist within a clip frame that can be processed by the graphic display device, the clip processing simulating means is called, and then the graphic data transfer means is called, so that the display area of the graphic data does not exist within the clip frame that can be processed by the graphic display device. 1. A clip processing method in a graphics processing system, comprising: graphics data display area determining means for calling the graphics data transfer means when the graphics data exists within a processable clip frame.