JPH052651A - Paint out plotting system - Google Patents

Abstract

PURPOSE:To reduce the burden of software and to plot a graphic at a high speed by registering the bit pattern of a paint out circle and copying it as it is at the time of plotting. CONSTITUTION:When there is the paint out circle, a central processing unit 1 judges whether the diameter is less than that of a reference circle or not. When the diameter is less than that of the reference circle, it is judged whether the circle in the size is registered or not in a pattern memory 4 to which the bit pattern is previously registered. When it is registered, an instruction is given the a paint out control part 2 and a display memory 3 is caused to execute plotting. When it is not registered, it is additionally registered in the pattern memory 4 if there is a space, and plotting is executed by using the paint out control part 2. When there is no space, the pattern which is recently least used is turned out, and the pattern is newly registered in the place. Then, circle is plotted by using the paint out control part 2. When the diameter of the circle is more than that of the reference circle, the circle is directly plotted from the central processing part 1 into the display memory 3. The circle plotted into the memory 2 is displayed in CRT 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid drawing method, and more particularly to a solid drawing method for a bitmap display device.

[0002]

2. Description of the Related Art Conventionally, this type of fill drawing method is
When a circle is drawn, the circle is approximated to a polygon, the polygon filling algorithm is used to calculate the address of the filled pixel in the circle, and the circle is drawn directly in the display memory by software.

[0003]

In the above-described conventional fill-drawing method, since all circles are drawn by software, it takes time to draw a figure in which many small circles are filled. There is a point.

[0004]

The fill drawing method of the present invention is set in advance in a fill drawing method of an information processing apparatus having a display memory in which a graphic is drawn and a display device for displaying the contents of the display memory. The pattern memory that has registered a plurality of bit patterns of circles that are smaller than the specified size but have different sizes and the insides are filled, and the position on the display memory where the input filled circles should be drawn. Instructing means for instructing, and a determining means for determining whether the circle to be drawn is the specific size or less when the input filled circle is drawn, and the determination result is not the specific size or less, Drawing means for drawing the filled circle at the designated position of the display memory;
If the determination result is less than or equal to the specific size, a bit pattern drawing means for reading a bit pattern corresponding to the size of the filled circle from the pattern memory and drawing a filled circle at the designated position in the display memory. And have.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of the central processing unit 1 of FIG.

The central processing unit 1 is a place for processing information by software, and can access the fill control unit 2, the display memory 3 and the pattern memory 4.
The pattern memory 4 is a memory for registering a bit pattern of a filled circle. When the fill control unit 2 receives a drawing instruction indicating the size of the filled circle and the position to be displayed, which is input from the central processing unit 1, the bit pattern corresponding to the input size of the filled circle is read from the pattern memory 4. It is read and drawn at the designated position in the display memory 3. The bitmap data on the display memory 3 is read out at once and displayed on the CRT 5.

Next, the operation of the embodiment will be described. When drawing a figure, a predetermined step (for example, 1 m)
The bit pattern of a filled circle having a diameter of 1 to 16 cm is registered in the pattern memory 4 in advance (m steps). When there is a filled circle during the graphic drawing process, the central processing unit 1 determines whether or not the diameter is 16 cm or less (step S1). At this time, if the diameter is 16 cm or less, it is determined whether or not a circle of that size is registered in the pattern memory 4 (step S2). If you are registered,
A bit pattern having a size corresponding to the drawing position is read out and is instructed to the filling control unit 2 to cause the display memory 3 to perform drawing (step S3).

When the pattern memory 4 is not registered (step S2), if there is a vacancy in the pattern memory 4 (step S4), the pattern memory 4 is additionally registered (step S5), and drawing is performed by using the fill controller 2 (step S3). If there is no space (step S
4) Eliminate patterns that are infrequently used (step S
6) After newly registering at the place where it was kicked out (step S
5) Draw a circle using the fill controller 2 (step S3). When the diameter of the circle exceeds 16 cm (step S1), the central processing unit 1 draws the circle directly on the display memory 3 (step S7). The circle drawn in the memory 3 is displayed on the CRT 5.

[0009]

As described above, according to the present invention, a bit pattern of a filled circle having a small area is registered in the pattern memory and copied as it is at the time of drawing, thereby reducing the load on software and speeding up graphic drawing. There is.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flow chart of a central processing unit in FIG.

[Explanation of symbols]

1 Central processing unit 2 Fill control section 3 display memory 4 pattern memory 5 CRT

Claims (2)

[Claims] 1. A fill drawing method of an information processing apparatus having a display memory on which a graphic is drawn and a display device for displaying the contents of the display memory, and the size is equal to or smaller than a specific size set in advance. Differently, a pattern memory in which a plurality of bit patterns of circles filled in inside are registered, an instruction means for instructing a position on the display memory in which an input filled circle is to be drawn, and the input fill When drawing a circle, a judgment means for judging whether or not the circle to be drawn is less than or equal to the specific size, and if the determination result is not less than or equal to the specific size, the filling is performed at the designated position in the display memory. Drawing means for drawing a circle, and a bit pattern corresponding to the size of the filled circle from the pattern memory if the determination result is less than or equal to the specific size. And a bit pattern drawing means for drawing a filled circle to the specified position of the display memory. 2. If the determination result is less than or equal to the specific size, a search unit that searches whether a circle of that size is registered in the registration unit, and if not registered by the search unit, the Pattern memory vacancy determining means for deciding whether the pattern memory has a vacancy, eviction means for erasing a bit pattern with low frequency of use when the pattern memory vacancy determination result is vacant, and vacancy for the pattern memory 2. The filled drawing method according to claim 1, further comprising additional registration means for additionally registering the bit pattern of the input filled circle in the pattern memory.