JPH04205386A - Image data edit control method - Google Patents

Abstract

PURPOSE:To reduce the number of interruptions against a CPU main body by executing the picture edit processing as a subroutine based on a branch instruction and generating the interruption once at the end of the entire processing. CONSTITUTION:When all the branch instruction to be executed are written in a bit map memory 13, the main body of a CPU 1 starts a picture edit processor 12. The picture edit processor 12 reads a branch instruction 1, performs transfer processing, and stores the transferred picture data in the bit map memory 13. Then, the picture edit processor 12 reads a branch instruction 2, performs the treble expansion of this transferred picture, transmits this to a frame memory 11, and displays the expanded picture on a display part 5. After the processing of the picture edit processor 12, the interruption is notified to the main body of the CPU1, and the main body of the CPU1 performs the processing against this interruption. Thus, the burden of the main body of the CPU1 can be reduced and the picture editing can be speeded up.

Description

[Detailed Description of the Invention] [Table of Contents Overview Industrial Application Fields Prior Art (Figures 4 and 5) Means for Solving the Problems to be Solved by the Invention (Figure 1) Working Examples (Figures 2 and 3) Effects of the invention [Summary] Regarding the image data editing control method, the number of processing interruptions in the image editing processor is reduced to speed up the processing, and the number of interruptions to the main CPU is also reduced. In an image data editing control method in which image processing is performed by sequentially running multiple programs that perform editing processing on image data, the multiple processing programs that perform editing processing are TECHNICAL FIELD The present invention relates to an image data editing control method, which is characterized in that it is sequentially called as a subroutine by a plurality of branch instructions, and based on which an image editing processor is operated. This is a control method for efficiently controlling an image editing processor that edits image data.

[Prior Art] When editing and controlling image data, there is an editing process in which image data on a bitmap memory is transferred, enlarged, reduced, rotated, mirrored, erased, etc., for example. When performing multiple processes like this, conventionally, an image editing processor is activated for each process to perform the editing process.

For example, as shown in FIG.
A microprogram for executing these processes 1 and 2 is set in 00, image data is transferred onto the bitmap memory 100, and the image editing processor is activated to perform reduction processing and rotation processing.

In this case, first enter the start address for process 1 (for example, "r□x0100") as the start address, and start up the image editing processor. The image editing processor reads this starting address field and sets the starting address rOx0100.
” and executes the microprogram of process 1. When the execution of process 1 is completed, an interrupt is notified to the main body CPU, and main body CI)U performs the interrupt process and notifies the end of process 1.

As a result, the main body CPU, as shown in FIG. 4(B),
In the start address area of the bitmap memory 100, the start address (for example, rOXO200) where the microprogram for process 2 is written is written, and the image editing processor is activated. The image editing processor now obtains the start address rOXO200J and executes the microprogram of process 2. When the execution of process 2 is completed, an interrupt is notified to the main body CPU, whereby the main body CPU performs the interrupt process and ends.

The processing of the image editing processor includes, for example, transfer processing,
There are enlargement/reduction processing, rotation processing, mirror image processing, erasure processing, etc. For this reason, bitmap memory is used for transfer processing,
Microprograms for enlargement/reduction processing, rotation processing, mirror image processing, and erasure processing are written in, and the processing is performed by writing the start address of the necessary item in the start address area.

At this time, for example, in the case of enlargement/reduction processing, the enlargement rate and
The reduction rate is set as a parameter, the rotation angle is set as a parameter in the case of rotation processing, and the coordinate data etc. specified on the display screen by a mouse, for example, are set in the case of transfer processing.

Then, as shown in FIG. 5, for each process (as described above), the main CPU waits for an interrupt notification that notifies the end of the process transmitted from the image editing processor, sets the next process start address, and starts the process. In this way, when the completion of all the desired processes is notified, the image editing process ends.

[Problems to be Solved by the Invention] Conventionally, interrupt processing is performed every time one process of an image editing processor is completed. Since the main body CPU executes interrupt processing with the highest priority, the more interrupt processing increases, the heavier the load on the main body CPU becomes, and the overall data processing becomes slower.

Moreover, the image editing processor cannot move on to the next process while this interrupt process is being executed, resulting in an interrupted state.

For example, after the process 1 in FIG. 4(A) ends, the process remains in an interrupted state until the process 2 in FIG. 4(B) is executed.

For this reason, for example, when processing such as transfer, enlargement, and erasing is performed continuously, the processing is interrupted twice, resulting in a problem that the image editing processing itself is delayed.

Therefore, an object of the present invention is to provide an image data editing method that can reduce the load on the main body CPU by reducing the number of interrupts to the main body CPU, and also reduce the interruption state of the image editing processor to speed up the processing. The object of the present invention is to provide a control method.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, as shown in FIG. As shown in FIG. 2, microprograms for processing to be executed for image editing processing, for example, a microprogram for processing 1 and a microprogram for processing 2, are set as subroutines using branch instructions.

That is, when the main body CPU 1 is notified from the keyboard 6 that the operator wishes to execute processing 1 and processing 2, the main body CPU 1 stores the microprogram for processing 1 and the processing in the bitmap memory 13 as shown in FIG. 1(B). Let microprogram No. 2 be a subroutine using branch instructions 1 and 2. Therefore, the main body CPUI sets branch instruction 1 and branch instruction 2 in the bitmap memory 13, and activates the image editing processor 12.

In FIG. 1(A), 2 is an external storage device, 3 is a display control section, 5 is a display section, 7 is a mouse, and 11 is a frame memory.

[Operation] With this activation, the image editing processor 12 is activated as shown in FIG.
As shown in B), read the start address area on the bitmap memory 13, read the start address ooxxo, recognize that the first instruction to be executed is branch instruction 1, and hold the return destination address. Then, it executes process 1, which is a subroutine of branch instruction 1. When the execution of process 1 is finished, it returns to the return destination address, reads the next instruction, recognizes that it is branch instruction 2, and executes the return destination again. The address is held and processing 2 is executed. When this is completed and the return destination address is returned, the next instruction does not exist, so the image editing processor 12 issues an interrupt to the main body CPU based on the completion of processing. .

As a result, the main body CPU performs processing for this, and the image editing process ends.

As described above, according to the present invention, image editing processing is executed as a subroutine based on a branch instruction, so an interrupt is generated only once at the end of all processing, which greatly reduces the number of interrupts to the main body CPU. Moreover, the interruption time of the image editing processor can also be shortened.

[Example] An example of the present invention will be described based on FIGS. 2 and 3.

FIG. 2 is a configuration diagram of an embodiment of the present invention, and FIG. 3 is an explanatory diagram of its operation.

In Figure 2, the same symbols as in Figure 1 indicate the same parts,
21 is a branch instruction creation section, 22 is an identification section, 23 is a return address holding section, and 24 is an IO space section.

In the branch instruction creation section 21, when an operator inputs an image editing command from the keyboard, the main body CPU reduces the command and creates a branch instruction.

The identification unit 22 identifies whether or not what is read from the bitmap memory 13 is a branch instruction, and if it is a branch instruction, writes the return address into the return address holding unit 23.

The IO room space 24 is a memory space part used for communicating with the main body CPU or the image control unit 4, and temporarily holds data transmitted from the main body CPU and stores data to be sent to the image control unit 4. It has functions such as temporarily holding data.

Next, a case will be described in which an image is cut out and enlarged according to the present invention.

First, the operator inputs an image code to be processed from the keyboard 6. The main body CPU thereby reads a predetermined image from the external storage device 2, stores it in the frame memory 11 via the space unit 24, and displays it on the display unit 5.

The operator then inputs an image editing command, a transfer command, and an enlargement/reduction command.

The main body CPU thereby causes the display unit 5 to display a request for inputting the transfer portion and the enlargement/reduction ratio.

The operator can then use the mouse 7, for example, to
The coordinates of the transfer target position on the display screen of the display section 5 are input, and the enlargement rate, for example, "2" is input from the keyboard 6. These position coordinates are sent from the display control section 3 to the main body CPU 5.

Based on this, the main body CPU determines that the command is for image editing processing, operates the branch instruction creation unit 21, and writes a transfer processing (e.g., corresponding to processing 1) command in the bitmap memory 13 in advance. The first address of the storage destination is written in branch instruction 1, and the coordinates of the transfer target position are written as a parameter. Also, as branch instruction 2, enter the start address of the storage destination of the same (enlargement/reduction processing (e.g., corresponding to processing 2) command) and enter "3" as a parameter. It is sent to the image control unit 4 via.

Based on this, the image control unit 4 writes the parameters and branch instruction 1.2 into the bitmap memory 13.

When all branch instructions to be executed have been written to the bitmap memory 13 in this way, the main body CPUI starts the image editing processor 12.

As a result, the image editing processor 12 first executes the branch instruction 1.
, performs transfer processing, and stores the transferred image data in the bitmap memory 13.

Next, the image editing processor 12 reads the branch instruction 2, enlarges the transferred image three times, sends it to the frame memory 11, and displays the enlarged image on the display section 5. Then, the processing of the image editing processor 12 is completed, and the main body CPU 1 is notified of the interruption.The main body CPU 1 then performs the processing in response to this interrupt, and the operation ends.

FIG. 3 is a flowchart showing these operations.

In the above description, two examples of image editing processing, transfer and enlargement/reduction, have been described, but the present invention is of course not limited to these (the number of processes can be determined as appropriate).

[Effects of the Invention] According to the present invention, necessary image editing processing can be performed continuously based on branch instructions, so that the main CPU
Not only can this greatly reduce the amount of interrupt processing required, but image editing can be performed continuously without interruption, reducing the load on the main body's CPU.
Image editing speed can be increased.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the present invention, FIG. 2 is a configuration diagram of an embodiment of the present invention. FIG. 3 is an explanatory diagram of the operation of the present invention, Fig. 4 is an explanatory diagram of a conventional example; FIG. 5 is an explanatory diagram of the operation of the conventional example. 1...Main CPU 2...External storage device 8...Display control section 4... Image control section

Claims (1)

[Claims] In an image data editing control method in which image processing is performed by sequentially operating a plurality of programs that perform image data editing processing, the plurality of processing programs that perform editing processing are executed as a subroutine by a plurality of consecutive branch instructions. 1. An image data editing control method characterized in that the image data editing processor is operated based on sequentially calling the image data editing processor.