JPH0443397A - Graphic display device - Google Patents

Abstract

PURPOSE:To display optional image graphic data and vector graphic data on a raster scan display at the same time by providing an image memory and a segment memory in addition to an image memory. CONSTITUTION:Figure data which need to be edited graphically is stored as the vector graphic data in the segment memory 8 and other graphic data are stored as the image figure data in the image memory. When the area of image figure data to be displayed in the image memory 21 is an area shown by vertexes A, B, C, and D, the image figure data in the data area are transferred to the image memory 6 through a high-speed image transfer bus 12. Vector graphic data E to be displayed in the segment memory 22, on the other hand, are transferred to the image memory 6 through a system bus 14. Consequently, the image graphic data and vector graphic data to be displayed are transferred to the image memory 23 at the same time and displayed on the raster scan display.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is mainly used for processing large amounts of graphic data by transferring image figures and vector figures to an image memory and simultaneously displaying the image figures and vector figures on a raster scan display. The mapping direction dealt with is related to graphical display devices.

[Summary of the invention]

In a device for displaying image data stored in an image memory on a raster scan display, the present invention provides an image memory that can hold a large amount of image figures expressed in pixels by a scanner or the like, in addition to an image memory that stores image data. , a control circuit for the image memory, a high-speed image transfer bus that transfers pixels from the image memory to the image memory at high speed, a segment memory that holds logical vector figures separate from the image memory, and control of the segment memory. The circuit simultaneously transfers the image figure and the hector figure to the image memory, and displays the image figure and the vector figure simultaneously on the raster scan display.

C. Prior Art] In conventional manipulating devices, a large amount of graphic data has been processed entirely as image graphic data or as vector graphic data. Some items that are processed entirely as image graphic data express high-speed display, but because they are image graphic data, there is a problem in that graphic editing is difficult.

In order to make it possible to edit figures, the best way is to handle everything as vector figure data, but the amount of data is huge, the cost of data input is high, the figure display is slow, and Problems such as difficulty in expressing images have occurred. Although each of these problems has been improved individually, they are not realistic.

[The problem that the invention aims to solve]

The present invention does not attempt to solve the above-mentioned problems of image graphic data and vector graphic data individually, but to take advantage of the respective strengths of image graphic data and vector graphic data and mutually assist each other in solving their respective problems. , provides a graphic display device that simultaneously processes image graphic data and vector graphic data. As a result, the graphic data that is subject to graphic editing is treated as vector graphic data, and the graphic data and image depictions of landscapes etc. after editing are
It is treated as image graphic data and represents a graphic display device with better overall efficiency.

[Means to solve the problem]

In order to solve the conventional problems, the present invention provides an image memory control device that controls writing and reading of an image memory for displaying images on a raster scan display, and an image memory control device that controls writing and reading of an image memory for displaying images on a raster scan display, and an image memory control device that is expressed in pixel data separately from the image memory. An image memory that can hold a large amount of image graphic data, an image memory control circuit that controls writing and reading from the image memory, and a segment memory that can hold logical vector graphic data, separate from the image memory. a segment control circuit that controls writing to and reading from the image memory control circuit, and a microprocessor that issues startup instructions to the image memory control circuit, the image control circuit, and the segment control circuit;
Video I that performs display control to display image data stored in image memory on a raster scan display
/F.

(Function) With the above configuration, image graphic data is transmitted from the image memory to the image memory via the image memory control circuit and the image memory control circuit, and vector graphic data is transmitted from the segment memory to the image memory control circuit and the image memory control circuit. , are transferred to the image memory, and the image graphic data and vector graphic data can be displayed simultaneously.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. 1st
In the figure, image data displayed on a raster scan display is stored in an image memory 6 under the control of an image memory control circuit 5 and displayed on the screen by a video I/F 9. On the other hand, the pixel-expressed image graphic data 11 transferred from the storage device 2 via the system bus 14 is controlled by the image memory control circuit 3 to have an area several times to several tens of times larger than the image memory 6. It is written into the image memory 4. Furthermore, the image memory control circuit 3 and the image memory control circuit 5 are connected by a high-speed image transfer bus 12 that transfers image graphic data held in the image memory 4 pixel-wise at high speed. Next, the logical vector graphic data 13 transferred from the storage device 2 via the system bus 14 is written into the segment memory 8 by the segment memory control circuit 7. The microprocessor 1 issues startup commands to the image memory control circuit 5, image memory control circuit 3, and segment memory control circuit 7, and also issues start-up commands to the image memory control circuit 5, image memory control circuit 3, and segment memory control circuit 7, and also issues startup instructions to the storage device 2 and the image memory control circuit 3. It performs interface control with the segment memory control circuit 7 and the image memory control circuit 5.

FIG. 2 is an explanatory diagram of simultaneous display of image graphic data and vector graphic data using the hardware configuration shown in FIG.

In advance, graphic data that requires graphic editing is stored in the segment memory 8 shown in FIG. 1 as vector graphic data, and other graphic data is stored in the image memory 4 shown in FIG. 1 as image graphic data. Here, if the area of image graphic data to be displayed in the image memory 21 is jJM indicated by the vertex ABCD, the image graphic data in the data research area is transferred to the image memory 6 via the high speed image transfer bus 12 shown in FIG. will be forwarded to.

On the other hand, vector graphic data E to be displayed in the segment memory 22 is transferred to the image memory 6 shown in FIG. 1 via the system bus 14 shown in FIG. The image graphic data and vector graphic data to be displayed are simultaneously transferred to the image memory 23 and displayed on the Lascouscan display.

〔Effect of the invention〕

As explained above, in the graphic display device of the present invention, by providing an image memory and a segment memory separately from the image memory, arbitrary image graphic data and vector graphic data can be simultaneously displayed on a raster scan display.

Therefore, when handling a large amount of graphic data and needing graphic editing, such as in map information processing, by efficiently separating image shapes and vector shapes and using this device, a large amount of processing related to map information can be performed. The effect increases.

[Brief explanation of drawings]

FIG. 1 is a hardware configuration diagram of a graphic display device for simultaneously displaying image graphics and vector graphics according to the present invention, and FIG. 2 is a diagram illustrating simultaneous display. ! ...Micro processor sensor 2...Storage device 3...Image memory control circuit 4...Image memory 5...Image memory control circuit 6...Image memory 7...Segment memory system jHIgJB8...Segment Memory 9...Video l/F lO...Image data 11...Image figure data 12...Image transfer bus 13...Vector figure data 14...Stem bus 21...Image memory 22... Segment memory 23...Image memory and above Applicant: Seiko Electronic Industries Co., Ltd. Patent attorney: Keinosuke Hayashi

Claims (1)

[Claims] In a graphic display device that displays graphic data stored in an image memory on a raster scan display, an image memory that holds image graphics expressed in pixel data by a scanner or the like, separate from the image memory;
A control circuit that controls the timing of the image memory, a high-speed image transfer bus that transfers image figures represented by pixel data from the image memory to the image memory at high speed, and a logical vector figure separate from the image memory. and a control circuit that controls the timing of the segment memory, extracts any image figure in the image memory and any vector figure in the segment memory, and stores the above image figure in the image memory. A figure display device characterized by simultaneously transferring image figures and vector figures and displaying image figures and vector figures simultaneously on a raster scan display.