JPH02133882A - Image data editing device - Google Patents

Abstract

PURPOSE:To contrive the diversification of an editing mode by constituting the editing device so that a two-dimensional pattern for showing an arbitrary picture pattern can be written through a mask function. CONSTITUTION:The editing device is provided with a CPU 1, a system bus 2, a main memory 3, a mouse 4 and a bit map memory 5. In this state, the CPU 1 generates write data to an editing area by leaving bit information of a part in which an effective bit of a mask pattern in a hatching pattern is set and clearing others, clears the bit information of a part in which an effective bit of a mask pattern in image data corresponding to area data is set, and writes generated write data, that is, a hatching pattern masked by a mask pattern, in an area in which the bit information is cleared. In such a way, by preparing various hatching patterns, and designating one of them, a two-dimensional pattern for showing an arbitrary picture pattern can be written through a mask function.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image data editing device that is applied to a system that handles image data such as a personal computer, word processor, or workstation.

(Prior Art) In this type of image data editing device, generally,
Move the cursor on the screen using a pointing device such as a mouse or tablet, specify the area corresponding to the image at the cursor position or the area around it as the editing area, and select the bitmap memory corresponding to the editing area. It is now possible to edit the image by erasing or inverting the image data using a mask function, etc.

However, erasing/inverting image data in this conventional device means turning on/off bits in a designated area.
It's just off. Computer graphics have advanced to the point where increasingly complex images can be displayed, and conventional equipment is becoming unable to handle the variety in editing such images.

(Problems to be Solved by the Invention) As described above, the conventional editing device has a problem in that it lacks diversity in editing functions.

The present invention was made in view of these problems, and
The object is to provide an image data editing device that can write a two-dimensional pattern representing an arbitrary picture, that is, a hatching pattern, through a mask function.

[Structure of the invention]

(Means for Solving the Problems) An image data editing device of the present invention includes a bitmap memory that stores image data in a bit image format;
a pointing device that encodes coordinates on a screen displaying the image data; a cursor data storage memory that stores cursor data representing the position of the cursor on the screen; and a cursor data storage memory that monitors the output of the pointing device and controls the movement of the cursor. a cursor data storage memory that updates the cursor data based on the amount of movement of the cursor when detected; an area data storage memory that stores area data that specifies an editing area based on the cursor data in the cursor data storage means; a mask pattern storage memory that stores a mask pattern for the area; a hatching pattern storage memory that stores a hatching pattern for the editing area;
a first calculation means that performs an AND operation between the mask pattern and the hatching pattern; a second calculation means that performs an AND operation between inverted data of the mask pattern and image data corresponding to the area data; , a third calculation means for performing a logical OR operation between the calculation result of the first calculation means and the calculation result of the second calculation means.

(Function) In this configuration, the result of the calculation by the first calculation means,
The bit information of only the part of the hatching pattern where the valid bit of the mask pattern is set is left, and the other parts are cleared, and the data to be written to the editing area is created.

The second calculation means clears the bit information of the portion of the image data corresponding to the area data where the valid bit of the mask pattern is set.

Then, the write data created by the first calculation means, that is, the hatching pattern masked by the mask pattern, is written into the area where the bit information has been cleared by the second calculation means.

Therefore, according to the present invention, by preparing various hatching patterns and specifying them as appropriate, a two-dimensional pattern representing an arbitrary picture, that is, a hatching pattern, can be written through the mask function.

(Example) Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of an image data editing device according to the present invention.

First, in FIG. 1, 1 is the CPU, 2 is the system bus, 3 is the main memory, 4 is the mouse, 5 is the bitmap memory, 6 is the CRT controller, 7 is the parallel-to-serial converter, and 8 is the CRT controller.
It is an RT display.

The CPU controls the CRT controller 6 and passes the image data stored in the bit image format in the bitmap memory 5 to the CRT display 8 through the parallel-to-serial conversion circuit 7, so that it is displayed on the CRT display 8.

The mouse 4 is used to move the cursor and specify an editing area to the CPU when editing the screen of the CRT display 8.The mouse 4 is used to specify an editing area to the CPU by moving the cursor. , hatching patterns, etc. are stored in the main memory 3.

FIG. 3 shows a memory map of this main memory 3.

In this figure, the main memory 3 is a cursor data area 31
, block data area 32 and editing area data area 33
, offset data area 34 , mask pattern data area 35 , hatching pattern area 36 , and work area 37
Each area stores various data necessary for data editing.

Here, the concept of these various data will be explained with reference to FIGS. 4 to 7.

In these figures, 41 is a screen, 42 is a block, and 4
3 is an editing area, 44 is a mask pattern, and 45 is a hatching pattern.

The coordinates (X, Y) in the screen 41 are the cursor points, and this cursor point is in the cursor data area 31.
is stored in.

The block 42 defines the maximum range of the editing area 43 that is updated per CPU editing process (described later), and the dimensions (Wx, Wy) are the block size, the dimension (O
x, Oy) is the block offset. This block offset defines the position occupied by the block based on the cursor point, and includes the dimension Ox from the cursor point to the starting edge along the horizontal scanning line, and the dimension Ox from the cursor point to the starting edge along the vertical scanning line. It consists of the dimension oy up to the edge. These block size and block offset are stored in the block data area 32.

Coordinates (a, b) are editing area start coordinates, dimensions (A,
B) is the editing area size. The start coordinates represent the start point of the editing area 43, and the size data indicates the dimensions of the editing area in the X and Y directions. This is because it is not included in area 43. These area data are stored in the editing area data area 33.

The mask pattern 44 is a bit pattern for clearing bit information at a position targeted for data update in the editing area 43, or for editing updated data in a form that applies to the cleared position. For example, Fifth
As shown in the figure, its size matches that of the block 42, and the area surrounded by the dashed-dotted line is marked with "1", and the area outside of it is marked with "0". If this is applied to the area, the image data in the area corresponding to the area where the valid bit "1" is set remains as is, and the image data in the area corresponding to the area where the bit "0" is set is deleted. The mask pattern 44 is used in this way, and its offset (Mx, My) is information for applying this mask pattern 44 to the editing area 43, and matches the editing area start coordinates (a, b). do.

The hatching pattern 45 is a two-dimensional bit pattern representing an arbitrary picture to be written in the editing area 43, and has a size twice the size of the block 42 in each of the X and Y directions. The blocks are arranged virtually across the screen 41,
It is used to write a pattern in a portion where the editing areas 43 overlap into the editing area 43. The hatching pattern offset (Hx, Hy) is set in the editing area 43.
This defines the position within one hatching pattern 45, and is determined as the remainder when the start coordinates (a, b) are divided by the size (2W x , 2 W y ).

These mask pattern offsets and hatching pattern offsets are stored in the offset data area 34,
Further, various patterns of the mask pattern 44 are stored in the mask pattern data area 35, and the hatching pattern 45 is stored in the mask pattern data area 35.
Various patterns are stored in the hatching pattern data area 36.

FIG. 2 is a flowchart showing the processing contents of the CPUI, and the data editing operation under the control of the CPU 1 will be explained with reference to this flowchart.

The CPU 1 monitors the position of the cursor by reading the output of the mouse 4 at regular intervals (step Sl,
S2). That is, in step S1, the output of the mouse 4 is read, and then in step S2, it is determined whether the amount of movement is zero. If the result of this determination is YES, the process is restarted from the next step S1.

If the result of the determination in step S2 is No, the cursor point (X, Y) is calculated based on the amount of movement of the cursor represented by the mouse 4, and the data in the cursor data area 31 of the main memory 3 is rewritten (step S3 ).

In response to this update of the cursor point (x, y), based on the new cursor point (X, Y), the block size (Wx, Wy) and block offset (Ox
, Oy) to start coordinates (a, Oy) of the editing area 43.
b) and area sizes (A, B) are determined and stored in corresponding locations in the area data area 33 (step S4).

Next, the mask pattern offset (Mx, My) and the half-hatching pattern offset (Hx, Hy) are determined (step S5). As mentioned above, the mask pattern offset (Mx, My) is determined by matching the start coordinates (a, b), and the hatching pattern offset (Hx, Hy) is calculated by changing the start coordinates (a, b) to the hatching pattern size. It is calculated as the remainder when divided by (2W x , 2 W y ).

Then, the process enters data update processing in step S6.

First, a logical AND operation is performed between the mask pattern 44 and the hatching pattern 45, and the bit information of only the part of the hatching pattern 45 where the valid bit of the mask pattern 45 is set is left, while the other bit information is cleared. write data is created (step 561).
, the write data is then stored in the work area 37 of the main memory 3 (step 562).

Next, an AND operation is performed on the inverted data of the mask pattern 44 and the image data in the editing area 43 specified by the start coordinates (a, b) and size (A, B), and the mask pattern 44 in this image data is Clear the bit information in the part where the valid bit is set (
step 863).

Then, a logical OR operation is performed between the write data stored in the work area 37 and the operation result in step S64 (step 564). As a result, the write data created in step S64, that is, the hatching pattern masked with the mask pattern, is written in the area in which the bit information of the editing area 43 has been cleared.

When the mask pattern shown in FIG. 5 is used and the hatch pattern shown in FIG. 6 is used, the image data is updated as shown in FIG.

Therefore, by preparing various mask patterns and hatching patterns and combining them in various ways, considerable diversification can be achieved.

〔Effect of the invention〕

As described above, according to the present invention, by preparing various hatching patterns, various two-dimensional patterns can be written as image data, and editing modes can be diversified.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the image data editing device according to the present invention, FIG. 2 is a flowchart showing the processing contents of the CPU shown in FIG. 1, and FIG. 3 is a memory map of the main memory shown in FIG. 4 conceptual explanations of the screen, Figure 4 is a conceptual diagram of the screen, the editing area on this screen, and various data used for editing, Figure 5 is a conceptual diagram of the mask pattern,
FIG. 6 is a conceptual explanatory diagram of a hatching pattern, and FIG. 7 is a conceptual explanatory diagram of an aspect after screen editing. 1...CPU, 2...System bus, 3...Main memory, 4...Mouse, 5...Bitmap memory,
6...CRT controller, 7...Parallel-serial converter,
8 is a CRT display.

Claims (1)

[Scope of Claims] A bitmap memory that stores image data in a bit image format, a pointing device that encodes coordinates on a screen that displays the image data, and stores cursor data that represents the position of a cursor on the screen. cursor data storage memory that monitors the output of the pointing device and updates the cursor data based on the amount of movement of the cursor when it detects movement of the cursor; Store area data that specifies the editing area based on the criteria,
An area data storage memory, a mask pattern storage memory that stores a mask pattern for the editing area, a hatching pattern storage memory that stores a hatching pattern for the editing area, and performs an AND operation between the mask pattern and the hatching pattern. a first arithmetic means; a second arithmetic means for performing an AND operation between the inverted data of the mask pattern and the image data corresponding to the area data; An image data editing device comprising: third calculation means that performs a logical sum operation with the calculation result of the calculation means.