JPS62202266A - Graphic processing system - Google Patents

Abstract

PURPOSE:To discriminate a graphic element to be selected with a good responsiveness by storing inputted coordinate information into a segment buffer memory and executing continuously the identification and display by a display device while it monitors input coordinates. CONSTITUTION:The graphic information from a CPU 100 is stored into a segment buffer 120. When a graphic display processor (GDP) 140 is started from the CPU 100, the GDP 140 retrieves and selects the graphic element included in a small area with the coordinate information inputted from a tablet 180 as a center out of the graphic information stored in a buffer 120 and identifies and displays the selected graphic element into a display device 160. At such a time, the coordinate information inputted from the tablet 180 is stored into the buffer 120, a GDP 170 identifies and displays while it monitors the input coordinates, thereby, being able to discriminate the graphic element to be selected with a good responsiveness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a graphic display device that selects a graphical element from graphical information displayed on a CRT screen based on the coordinates of an input device. (pick) and display methods.

[Conventional technology]

In graphic display devices in the CAD (computer aided design) field, gates and ICs are displayed on the display, for example when creating a pattern diagram for a printed circuit board.

In the process of creating mode lines while arranging or wiring them,
If a user wants to change a mode line, he or she must select that mode line. However, when the lines are crowded as in the mode diagram, even if the user uses an input device such as a tablet to move the cursor corresponding to the screen onto the mode line to be changed and gives a pick command, the graphic will not be displayed. Display devices have the problem of selecting a mode line that is different from the mode line that the user wants to change.To solve this problem, conventional graphic display devices move the cursor without giving a pick command. From the coordinates of the cursor,
By echo displaying (displaying in a different color, displaying a marker, etc.) the graphic elements close to the coordinates, the user is informed of which graphic element is currently selected. It has a function that makes it easy to distinguish (dynamic big function).

The above principle will be explained below. CPU - Graphic display processor (hereinafter referred to as GDP) software
The hard interface is shown in Figure 2. As a pre-interface step, tablet controller 270 reports input coordinates from tablet 280 onto M-8 (main memory) 290. Based on the reported coordinates, the CPU 200 picks the startup mode 221 in the startup information in the segment buffer 220 and selects the start address 222 and end address 223 so as to execute all of the currently displayed graphic data 227. , and activates the GDP 240 via the graphic interface 230. The G D P 240 extrudes the graphical element covering the designated pick area 224 and reports the graphical element information to the pick report area 225 in the segment buffer 220 . Here, the configuration of the graphic elements of the graphic data 227 is shown in FIG. 3(a). The graphic elements include a graphic element attribute 310, a graphic element number 320, a drawn graphic attribute 330,
Consisting of graphic drawing commands 340, pick report area 2
25, the graphic element number 320 and the segment buffer address where the graphic element exists are reported. Here, FIG. 3(b) is an example of a graphic element for drawing a circle.

Upon receiving the pick report, the CPU 200 determines whether there is a picked graphical element, and if so, determines whether it is the same as the graphical element currently echoed, and if it is the same, erases the current echoed display. A command is given to GDP240. Then, a command is issued to the GDP 240 to echo-display the graphic element picked this time. When this is completed, the same process is performed for the next coordinate from the tablet controller 270, and by repeating this process, the dynamic pick function is realized.

In this way, the CPU 200 controls the tablet controller 2.
Based on the input coordinates from 70, for one coordinate, G
The DP 240 is activated one to three times. 210 is a system bus, 250 is a frame memory,
260 is a display. Related devices of this type are, for example, Japanese Patent Application Laid-open Nos. 60-194488 and 60-194488.
0-159790 and the like.

[Problem that the invention seeks to solve]

The processing of the dynamic pick function described above is performed when the CPU selects GD for one of the input coordinates from the tablet controller.
If activation is applied to P at least once and echo display is performed, activation occurs three times, so the processing time from input to echo display is quite long, and the user has to move the cursor. Problems have been pointed out that, due to this, the followability of the echo display is poor and the followability of the cursor display is also poor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a graphic display device that allows the dynamic pick function to be echo-displayed smoothly and responsively to the user.

[Means for solving problems]

This is achieved by having the dynamic pick function on the buffer and by having the dynamic pick processing function while monitoring the input coordinates from the tablet.

[Effect]

The tablet controller reports input coordinates from the tablet into the specified segment buffer and flags the coordinates as valid. After GDP confirms that the flag is valid, it captures the coordinates and
Set the pick area from the coordinates, find the graphic element that falls on the pick area in the given graphic data,
If found, the currently echoed graphical element is deleted and a new echoed display is performed. By repeating steps 1 and 2, dynamic pick operation can be performed without the intervention of the CPU.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of the CPU-GDP of the present invention. C
The PU 100 sets the top and last addresses of the graphic data 127 to be processed in the start address 122 and end address 123 in the segment buffer 120, selects the startup mode 121, and sets the start address register 131 in the graphic interface 130. (not shown) and the data word number register 132 (not shown) are set with the start address of the start information and the number of data words for the entire process, and the GDP 140 is started. Then, the hardware operates, the contents of the segment buffer address (instruction pattern) specified by the start address register 131 are entered into the read-only FIF○ 1133 (not shown), and the G
The instructions are decoded by the DP 140 microprogram. First, the GDP 14.0 receives the activation information, stores it in the internal memory, jumps to the address indicated by the start address 122, and writes the processing of each graphic element data to the display 150. 16
Displayed to 0. Also, in the pick mode, each graphic element data is placed in the pick area 1 designated by the CPU 100.
24, information about the graphical element is written to the pick report area 125 using write FIFO 2 (not shown) 134 in the graphic interface 130. Also, GDP140 is 1
After completing one startup operation, the CPU sends a termination interrupt.
Go to 100. After that, the CPU 100 starts the next
Until it goes to DP 140, G DP 140 will:
When tablet controller 170 writes the coordinates input from tablet 180 onto tablet coordinate data 126 in segment buffer 120, it decodes the coordinates and displays a cursor on display 160.

Under such a configuration, a dynamic pick mode is provided as a startup mode, and first, CPU1 is set to GDP140.
00 sets the startup mode 121 to dynamic pick mode, the start address 122 and end address 123 are set to process all the graphic data 127, and GDP 1
Start up to 40. The processing flow of the activated GDP 140 is shown in FIG.

The GDP 140 first determines that it is in the dynamic mode and stores the start address 122 and end address 123 in internal memory. This is stored internally for repeated processing. Next, the current tablet coordinate data is taken in, a cursor is displayed, and the pick area is set in the internal memory based on the tablet coordinates.

Here, the tablet coordinate data includes a flag indicating the end of activation of the dynamic pick mode, which is controlled by the CPU 100. If it ends, the CPU 10 writes the information of the graphical element currently being echoed to the pick report area
0 can be notified of the selected graphical element. If not completed, a graphic element corresponding to the pick area is searched in the graphic data. If that graphical element does not exist, or if the picked graphical element is the same as the graphical element currently being echoed, the next tablet coordinates are imported.

When a new graphical element is picked, the currently displayed echo display must be cleared. for that purpose,
It is necessary to save the address of the picked graphic element and the graphic drawing attribute information at that time. Thereafter, the address and graphic drawing attribute information of the graphic element currently being echoed are recovered, and only that graphic element is executed and erased. Then, the address and graphic drawing attributes of the currently picked graphical element are restored, and only that graphical element is executed for echo display. Here, the address and graphic drawing attribute of this graphic element must be saved in the internal memory because they will be erased during the next echo display. When this is completed, the process returns to the process of taking in the next tablet coordinates, and the process is repeated in the same manner, thereby realizing the dynamic big function without the intervention of the CPU 100.

〔Effect of the invention〕

According to the book, Zenkai, the functions of Dyna 1 Mitsukubitsuku can be realized by processing only GDP without the intervention of is effective.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of the present invention, Figure 2 is a configuration diagram of the conventional system,
FIG. 3 is a diagram showing the configuration of graphical elements, and FIG. 4 is a diagram showing the flow of graphic display processing according to the present invention. 100...CPU, 120...Segment buffer memory, 126...Tablet coordinate data, 130...
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Claims (1)

[Claims] 1. A central processing unit for processing graphic information, an input device for inputting coordinate information, a display device for displaying graphic information, and a segment buffer memory for storing graphic information from the central processing unit for the display device; A graphic display device that searches for and selects a graphical element included in a small area centered on the coordinate information input from the input device from among graphical information stored in a segment buffer memory, and identifies and displays the selected graphical element. In the graphic processing method, coordinate information input from the input device is stored in the segment buffer memory, and the display device continuously displays the identification while monitoring the input coordinates. .