JPS62235687A - Scroll displaying system for image data - Google Patents

Abstract

PURPOSE:To bring a great deal of image data to a scroll display at a high speed by providing plural pieces of buffers for reading successively an image data from a file device, and transferring successively the contents of the buffer to an image memory. CONSTITUTION:An image processing system is constituted of a control part 1, line counters 2, 3, an instruction issuing part 4, a file device 5, buffers 6, 7, a transfer part 8, an image memory 9, a display area moving part 10, count-up parts 11, 12, a stepping part 13, and selectors 14-16. In this state, an image data in the file device 5 is transferred continuously to the buffers 6, 7, data in its buffers 6, 7 are transferred successively to the image memory 9, and also, a display area in a display part is moved successively by the display area moving part 10.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a scroll display method for image data.

[Conventional technology]

Conventionally, in an image processing system, as shown in FIG. 4, when image data stored in a file device 100 is scroll-displayed using an image processing device, the display area is moved on the display unit and then displayed in units of one line. The image data is transferred from the file device 100 to the image storage section 300 via the main storage section 200.

[Problem that the invention seeks to solve]

In the conventional image data scroll display method described above, the transfer unit of image data to the image processing storage section in the image processing device is one line of display area on the display section. The disadvantage is that the transfer time becomes very slow and continuous scrolling is difficult.

[Means for solving problems]

The present invention is aimed at solving the above-mentioned drawbacks, and includes securing one line of image data in an area that can be displayed on a display unit in an image processing device as a buffer in a main storage unit for multiple lines; 1. A plurality of lines of image data stored in the file device are asynchronously and continuously transferred to a buffer in the main memory.

2. Transfer one line of the buffer in the main memory to the image storage in the image processing device.

3. After the data is input to the image memory, move the display area of the display unit by one line.

The above operations are repeated on the image data stored in the file device up to the required scroll display area. In order to asynchronously transfer multiple lines from the magnetic disk to the main memory buffer section in operation 1,
A processing method is used in which the next transfer command is issued before one transfer operation is completed.

〔Example〕

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

FIG. 1 shows a block diagram of one embodiment of the invention.

Referring to FIG. 1, this embodiment includes a control section 1, two line counters 2 and 3, an instruction issuing section 4, a file device 5, two buffers 6 and 7, a transfer section 8,
It can be seen that it is composed of an image memory, a display area moving section 10, two count up sections 11 and 12, an increment section 13, and three selectors 14, 15 and 16.

The file device 5 stores a lot of image data, and one part of the image memory 9 is
The contents of the buffers 6 and 7 are monitored by the control unit 1, and when one line of image data is input, an instruction from the control unit 1 is sent to the buffer 6 or 7. is transferred to the image memory 9 by the transfer unit 8 based on the display area moving unit 10.
The line counter 2 and the line counter 3, which are written and displayed at the address specified by , indicate the address of the file device 5 to be read into the buffer 6 and the buffer 7, respectively. Line counter 2゜Line counter 3 and display area moving unit 10 operate based on instructions from control unit 1.
Count-up section 11, 12 and step-up section 13, respectively.
It is counted up by. Selectors 14, 15 and 16 respectively correspond to line counters 2. This is provided for initializing the line counter 3 and display area moving section 10 from the control section 1. Switching signals from the control unit 1 to the selectors 14, 15 and 16 and signals unnecessary for the explanation of this embodiment are omitted to avoid complication of the drawings.

FIG. 2 is a flowchart of this embodiment.

The processing operation of this embodiment will be explained below with reference to FIG.

When a scrolling instruction is given along with a scroll width specification, first, in step (3), the control unit 1 sets the content i of the line counter 2 to 1 and the content j of the line counter 3 to 2 via the selector 14 and the selector 15. After each initialization, the i in the file device 5 is sent to the instruction execution unit 4.
Issue a read command for the image data of the line (
step ■), and then issue a read command for the j-th line of image data in the file device 5 (step Instructs to input the image data of each line into the buffer 7.

By monitoring the buffer 6, the control unit 1 waits for the completion of the read command to the buffer 6 issued in step (2) (step (2)). When it is determined that the input processing to the buffer 6 has been completed, the control section 1 causes the transfer section 8 to transfer the image data in the buffer 1 to the image memory 9 (step 2).

Next, the contents of the display area moving unit 10 are incremented by the operation of the increment unit 13 and the selector 16 to move the display area by one line.
6, the line i is counted up by two (step ■). The control unit 1 determines whether the line i after the run-up is the final line (step ■). If it is the final line, the process ends, but if not, the command execution unit 4 is instructed to A read command for the image data of the i-th line is issued (step 2).

Next, the same processing as steps ① to ① is performed regarding the transfer of the image data specified by the line counter 3 in the file device 5 to the image memory 9 via the buffer 7 (step [stock] to step ②). .

In this embodiment, two buffers are provided, but it goes without saying that there may be three or more buffers. FIG. 3 is a block diagram showing a comparison with the conventional example shown in FIG. 4 in the case where three buffers are provided.

〔Effect of the invention〕

As explained above, according to the present invention, a plurality of buffers are provided for sequentially reading image data from the file device, and the contents of the buffers into which image data is input from the file device are sequentially transferred to the image memory. The influence of the slow output time of the file device on the scrolling display of image data is reduced, and a large amount of image data can be scrolled and displayed at higher speed.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 2 is a flowchart of this embodiment, FIG. 3 shows an embodiment of the pond of the present invention, and FIG. 4 shows a conventional example. 1...Control unit, 2.3...Line counter, 4...
・Instruction issuing unit, 5.100...File device, 6.7
... Buffer, 8... Transfer section, 9... Image memory, 10... Display area moving section, 11.12... Count up section, 13... Stepping section, 14.15. 16...
-Selector, 200...main storage section, 300...image storage section. Figure 1

Claims (1)

[Claims] An image processing system comprising an image processing device including an image storage unit, a display unit having means for sequentially moving and displaying image data stored in the image storage unit, and a central processing unit having a main storage unit. , the image data in the file device connected to the system is continuously transferred to a plurality of buffer units in the main storage unit, and the data in the buffers is sequentially transferred to the image storage unit, and the display area in the display unit is A scrolling display method for image data, characterized in that images are sequentially moved.