JPS60485A - Graphic information processing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a graphical information processing system, and particularly to a graphical information processing system that can improve processing performance.

[Background of the invention]

In the conventional graphic information processing method used in graphic display devices, etc., when selecting display figures, all the figures are developed into vectors, and then a selection judgment (screening) is performed for each vector. When there are many figures that are not selected, as in the case of FIG.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to provide a graphical information processing method capable of solving the above-mentioned problems in conventional graphical information processing methods and improving processing performance. It's about doing.

[Summary of the invention]

The main points of the present invention are a means for storing graphic data, a means for displaying and converting the graphic data read from the storage means,
In a graphic display device having means for selecting graphic data to be displayed from among the graphic data converted by the converting means, each unit of the graphic data includes a graphic displayed by the unit. Add the existence area coordinates,
Intersect determination is made between the area indicated by the existing area coordinates and the area selected by the selection means, and the graphic data is read out from the storage means and converted only when the surface areas intersect. That's what I did.

[Embodiments of the invention]

EMBODIMENT OF THE INVENTION Below, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram of a display conversion section of a graphic display device showing one embodiment of the present invention. In the figure, 1 is a graphic data storage buffer (Display) that stores graphic data.
Data Buffer: DDB), 2 is an arithmetic unit (Arithmetic unit) that expands graphic data into vectors.
cLogical Unit: ALU), 3 is a microprogram storage device that stores a microprogram that controls the operation of the entire display conversion section.
storage: MS), 4 is a sequencer that controls the order of microprograms.
S E Q ), 5 is a selection determination device (Select, or: 5EL) that determines the display selection of graphics, and 6 is an opcode storage device t (OpecodeRegiste) that temporarily stores the first word of the graphics data being processed.
r: OP R).

FIG. 2 shows the format of the graphic data, and shows a case (A) where there is a vector existence area designation, which will be described later, and a case (B) where there is no designation. In FIGS. 2(A) and 2(B), the first word is called an opcode and indicates what kind of figure (for example, character string 9 arc, etc.) the unit figure data represents.

In this embodiment, the final bit of the operation code is made to correspond to the presence or absence of designation of a vector existence area (hereinafter simply referred to as "existence area"). That is, when the last bit of the operation code is 1', it is defined that the existence area is not specified, and when the last bit is 0', it is defined that the existence area is specified.

As an example is shown in FIG. 3, the existence area indicates a rectangle 8 that completely encompasses the figure 7 when the unit figure data is developed into a vector, and the coordinates of both ends of the diagonal of this rectangle 8 are The coordinates are the existence area coordinates.

Operands are set following the above operation code or existence area coordinates. The operand is a general term for data attached to the figure defined by the above operation code (radius of a circle, center coordinates, character code of a character string, etc.).

The operation of this embodiment will be described below with reference to the flowchart shown in FIG. 4 regarding the process of processing one unit figure.

When the first word (opcode) of the graphic data of a certain unit figure is input from the graphic data storage buffer l to the arithmetic unit 2, this data is transferred to the opcode storage device 6 and held until the next opcode is input. Ru. The least significant bit of the operation code storage device 6 is directly connected to the sequencer 4, and the sequencer 4 branches the microprogram as follows depending on the contents of the least significant bit of the operation code. That is, the least significant bit above is
(corresponding to "No Existence Area Specified"), the microprogram that processes the existence area is skipped. Furthermore, when the least significant bit is 0' (corresponding to the "existence area specified"), the following existence area processing is performed.

When the existing area coordinates are input from the graphic data storage buffer 1 to the arithmetic unit 2, this data is transferred to the selection determining unit 5 and compared with the display selection area stored therein. As a result of the above comparison, whether or not the existence area intersects with the display selection area is reported to the sequencer 4, and the microprogram is branched. If the existing region and the display selection region do not intersect, the processing after the intersection determination shown in FIG. 4 (operand input, vector expansion, vector display selection, etc.) is skipped.

As is clear from the above explanation, according to the graphic display processing method using the display converter shown in this embodiment, display performance is determined not by the amount of graphic data to be scanned but by the amount of data (vectors) displayed on the display screen. This makes it possible to improve responsiveness when enlarging a drawing.

It goes without saying that each means shown in the above embodiments is shown as an example, and the present invention should not be limited thereto.

In addition, whether or not to include the data in the above existing area in the graphic data depends on the processing time when inputting the data in the above existing area added to the graphic data, and the processing time when inputting the data in the above existing area in the graphic data without adding the data in the above existing area. This is a problem that is determined by comparing the processing time when inputting data and calculating the existing area each time.Generally, for simple figures (so-called unit figures, etc.), it is more advantageous to calculate each time. It can be said that In the case of graphic data corresponding to a figure of a special shape, it is advantageous to include the existing region in advance in the graphic data.

〔Effect of the invention〕

As described above, according to the present invention, in a graphic display device, an existence area defined as a rectangle that includes a vector expanded for each unit movement of graphic data is calculated in advance, and graphic data that requires this is calculated in advance. Since the input information is added to the input data, it is possible to realize a graphic information processing method with improved processing performance, which is a remarkable effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 (
A) and (B) are diagrams showing a graphic data format, FIG. 3 is a diagram showing an example of an existence area, and FIG. 4 is a processing flowchart. 1: Graphic data storage buffer, 2: Arithmetic unit, 3: Microprogram storage device, 4: Sequencer. 5: Selection determination device, 6: Operation code storage device, 8: Existence area. Figure 1 Figure 2

Claims (1)

[Claims] A graphic display having means for storing graphic data, means for display-converting the graphic data read from the storage means, and means for selecting graphic data to be displayed from among the graphic data converted by the converting means. In the apparatus, for each unit of the graphic data, existence area coordinates that include the figure displayed by the unit are added, and an intersection determination between the area indicated by the existence area coordinates and the area selected by the selection means is performed. A graphic information processing method characterized in that the graphic data is read out from the storage means and converted only when the two regions intersect.