JPS61248177A - Graphic generating device - Google Patents

Abstract

PURPOSE:To smear a graphic at a high speed by obtaining automatically the starting point coordinates of smearing and the end point coordinates of the smearing corresponding to (y) coorinates to generate the (y) coordinate generating device. CONSTITUTION:When the section between segments l1 and L2 is smeared, a (y) coordinate generating device 1 changes (y) coordinates one by one between scopes y1 and y2 stipulated by a (y) range register 2. An (x) coordinate value xs of one point on a starting line l1 in which (y) coordinate value comes to be yo by a starting point generating device 4, is obtained and the l1 is defined by a starting line data register 3. An (x) coordinate value xe of one point on an end line l2 is obtained by an end point generating device 6 and the l2 defined by an end line data register 5. When yo is given to xs and xe, the starting point generating device 4 and the end point generating device 6 are composed so that they can be simultaneously obtained, a straight line generating device 7 generates the picture element between xs and xe, and a writing control device 8 obtains the address on a frame memory 9 from the (c) coordinate value and Yo obtained by the straight line generating device 7 and executes the writing control.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a figure generator for filling out the inside of a figure.

BACKGROUND OF THE INVENTION An example of figure filling in a conventional figure generator will be described below with reference to the drawings.

FIG. 4 is a block diagram of a conventional graphic generator. 1o
is a start and end point generator, 7 is a straight line generator, 8 is a write control circuit, 9 is a frame memory, 3 is a start line data register for defining the start line of blank filling, and 6 is a blank line generator. This is the end line data register for defining the end line of crushing.

The operation of the graphic generator configured as described above will be explained below.

For example, when filling out the space between the line segments 11 and j2 shown in FIG. Then, find the X coordinate 18 corresponding to the y coordinate value y0. Similarly, in the end line data register 5, "121" 1?
``22'' On the end line 12 defined by 72, find the X coordinate value X that corresponds to the y coordinate value y0.

Xs and X obtained in this way. During this time, as shown in FIG. 3, a straight line is generated by a straight line generator 7. The write controller 8 determines an address on the frame memory from the X coordinate value obtained by the linear generator and the y coordinate value obtained from 1o, and writes it into the frame memory 9.

Problems to be Solved by the Invention However, in the configuration shown in FIG. 4, the start and end point generators are realized by a computer program, and even if a high-speed processor is used, there is a limit to the speed.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a graphic generation device for high-speed graphic crushing.

Means for Solving the Problems In order to solve the above-mentioned problems, the figure generator of the present invention sets the starting point so that the coordinate values of the filling start point and end point corresponding to the y coordinate generated by the y coordinate generator are simultaneously determined. A generator and an endpoint generator were constructed.

Effect of the Invention With the above-described configuration, the present invention can simultaneously determine the starting point and ending point of filling, thereby making it possible to fill out figures at high speed.

EXAMPLE Hereinafter, a graphic generator according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a figure generator in an embodiment of the present invention, where 1 is a y-coordinate generator, 2 is an arrangement register that defines the upper and lower limits of the y-coordinate, and 3 defines a filling start line. 4 is the starting point generator that generates the coordinates of a point on the starting line, 5 is the ending line data register for defining the fill-in end line, and 6 is the starting point generator that generates the coordinates of one point on the route. with an endpoint generator for 7
8 is a linear generator that generates pixel data between the start point and the end point, and 8 is a write controller that controls when pixel data is written into the frame memory.

The operation of the graphic generator configured as described above will be explained below.

For example, when filling in between the line segments 11 and 12 shown in FIG. 2, the y-coordinate generator 1 changes the y-coordinate one by one within the y-coordinate range 71*72 defined by the arrangement register 2. The I coordinate value of a point on the starting line l whose y coordinate value at this time is yo! 8 is generated by the starting point generator 4 using the well-known DDA. 11 is the starting line data register 3, s, ! 11171#X21p 72
Defined using the value of Similarly, the I coordinate value of one point on the ending line lt2! The end point generator 6 calculates co. 1
2 is the end line data register 6 “12” “1” “22”
, 72 and x6 are determined simultaneously when yo is given, the starting point generator and the ending point generator are configured. The straight line generator 7 has x, and x. During this period, pixels are generated as shown in FIG. The write controller 8 controls the X-coordinate value obtained by the linear generator, 70, and the address of the medical frame memory 9← by weighting them by 11.

Effects of the Invention As described above, the present invention has a configuration in which the y-coordinate generator and the coordinates of the start point and the coordinate of the end point of punching are simultaneously determined in accordance with the y-coordinate generated by the y-coordinate generator. It is now possible to fill in shapes at high speed.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a figure generator according to an embodiment of the present invention, Fig. 2 is a diagram showing an example of a filled-in figure, Fig. 3 is a conceptual diagram of straight line generation, and Fig. 4 is a block diagram of a conventional figure generator. It is a diagram. 1...y coordinate generator, 2...mark/arrange register, 3...start line data register, 4...mountain...
Start point generator, 6... End line data register, 6.
・River/end point generator, 7...Line line generator, 8...
...Write control circuit, 9...Frame memory.

Claims (1)

[Claims] A y-range data register for defining the range of y-coordinates, a y-coordinate generator for continuously generating y-coordinates in the range defined by the above register, and a starting line for defining the line segment from which to start filling. Define a data register, a start point generator that generates an x coordinate corresponding to the y coordinate generated by the y coordinate generator on the line segment defined by the start line data register, and a line segment at which filling is to be completed. an end point generator that generates an x coordinate corresponding to the y coordinate generated by the y coordinate generator at the same time as the start point generator on the line segment defined by the end line data register; , a straight line generator that generates a straight line between the starting point and the ending point obtained from the starting point generator and the ending point generator, and the x coordinate generated by the straight line generator and the y coordinate generated by the y coordinate generator. A graphic generation device characterized by comprising a write control circuit for determining and writing an address on a memory, and a frame memory.