JPH04175800A - Vector font drawing device - Google Patents

Abstract

PURPOSE:To simplify and accelerate the control of the side giving coordinate values by allowing the side giving the coordinate values to draw the contour of a character to paint out a rectangular region. CONSTITUTION:The side giving coordinate values to draw the contour of a character merely performs a process giving coordinate values to draw the contour of the character, scanning is performed in the horizontal direction from the left side on a memory. All dots after a black dot appears on the scanning line until the next black dot appears are converted into black, and a rectangular region converted by a coordinate converting circuit 15 is smeared away from the minimum value of the X-coordinates by using the judgment result of a position detecting circuit 14. It is not necessary to judge and process the deletion and addition of black dots to smear away the rectangular region. The control of the side giving the coordinate values can be simplified and accelerated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for dividing and drawing characters defined by a vector of rotation numbers.
The present invention relates to a character pattern generation device that draws the outline of a divided character and fills in the inside thereof, and particularly relates to a vector font drawing WJ device suitable for filling in the inside of the outline.

2. Description of the Related Art A character pattern generating device is known that generates a high quality character pattern by drawing the outline of a character (vector font) defined by a plurality of vectors and filling the inside thereof. In this type of device, after drawing the entire outline of a character, the drawing pattern is scanned in one direction, and all dots from the appearance of a black dot to the appearance of the next black dot are converted to black, thereby drawing the inside of the outline. The method of filling in the area is applied.
A conventional vector font drawing device will be explained below. Figure 4 shows a conventional vector font.
6 is a block diagram showing an example of a system including a picture device;
．． Y, ゎ6ooia, 1゜8□jo,a1, :□The current coordinate values of the given X and Y coordinates that are currently being drawn are within the rectangular area set by the coordinate values of two points. If it is within the rectangular area, the memory writing unit 4
Grant write permission to. 2 is a coordinate comparison circuit,
If there are only black dots in the filling direction, such as at the sharp end of a character (character pattern), □l@ (hereinafter,
1 dot (referred to as the sharp edge), if you fill it out, you will have the inconvenience of filling out all dots after that dot position. ! '
) 4 L f) h a (Q j!J F ′y
htl! '! ! If there are black dots lined up to connect the black dots of '□ (hereinafter referred to as □ intermediate points), then the starting point, intermediate point, and so on on the same scanning line exist.

Wow, a few months. 81 painting, crushing 1]・There is an inconvenience that the tapered part is rubbed off. Other than that, determine from the preceding coordinate value given one time before the current coordinate value and the current coordinate value! i1 gives write permission to the memory write circuit 4. 3 is a coordinate address conversion circuit which converts the obtained coordinate value 4 into an address on the memory 6 and a bit position on the address. When the write circuit 4 receives write permission from both the write control circuit 1 and the coordinate comparison circuit 2, it actually writes the data into the memory 6 using the address and the data indicating the bit position on the address. I do.

5 is a filling processing circuit which scans the memory 6 in one direction,
All dots from the time the black dot appears until the next male dot appears are converted to black. 7 is a register that holds the given preceding coordinate values and current coordinate values, the coordinate values of two points indicating a rectangular area, and data for filling in divided characters. A conventional vector font drawing device 8 is configured according to 1 to 4 above.

In the vector font drawing system configured as described above, a process of dividing a character, drawing an outline, and filling the inside thereof will be explained.

FIG. 5 shows the space in which the letter A is divided into nine parts, and each rectangular area is numbered from ■ to ■. 9 is the upper left coordinate value and indicates the origin (0, 0>; 1o is the upper left coordinate value @ (XA, YA) that specifies the rectangular area ■; 11 is the lower right coordinate value that specifies the rectangular area ■ ( XB.

'r'B), 12 is the coordinate value (XN.

YN).

FIG. 6 shows the outline of the rectangular area ■ in FIG. 5 using the conventional vector font drawing device 8 in FIG.
13 is the range of the rectangular area ■.

FIG. 7 is a diagram in which the rectangular area (2) in FIG. 5 is correctly filled in when the filling process is performed in the horizontal direction on the memory 6. In Fig. 6, if we scan in the horizontal direction and perform a narrowing process such as converting all dots f from the appearance of a black dot to the appearance of the next black dot to black, we will see Fig. 7. I can't get the fill result shown.

In a system including the conventional vector font drawing device shown in FIG. 4, in order to obtain a filling result like the 7th section, it is necessary to receive information about which part of FIG. 6 is to be filled out. An example is shown in FIG.

Figure 8 is a diagram created by deleting and adding black dots and gamma dots in Figure 6 to create a contour to obtain the filling result shown in Figure 7 when filling in the horizontal direction. .

As shown above, in the conventional vector font drawing system shown in FIG. It was being processed.

Problems to be Solved by the Invention However, in the above conventional configuration, when dividing a character and creating a part of the character, after contouring the divided character by rectangular areas, in addition to the black dots in the outline,
After receiving information about which part is to be filled in, the black dots are deleted and black dots are added for the filling process. In such a processing method, the side that provides the coordinate values for drawing the outline of the character not only gives the coordinate values for drawing the outline, but also divides the entire character into outlines, rectangular areas, and rectangular areas. Since the above-mentioned deletion or addition of the black dots is determined based on the outline of the character, the control becomes complicated and it is difficult to increase the speed.

The present invention solves the above-mentioned conventional problem, and the side that provides the coordinate values for drawing the outline of a character must delete black dots and judge whether the power is 0 or not and process them in order to fill in the rectangular area. A vector font drawing system that eliminates the need for fonts! It is a Shino whose purpose is to serve.

Means for Solving the Problems In order to solve the above problems, the vector font drawing device of the present invention uses a given X,
A door that compares the actual relationship between the current coordinate value of the coordinate and the previous thickness vP@ given before the current coordinate value and determines whether the current coordinate value needs to be drawn. If the current coordinate value is within the rectangular area specified by the target ratio $2 circuit and the current coordinate value and the coordinate values of two points (referred to as position detection result (1)), Y of locus a value
The coordinate value is within the Y%j standard value of the rectangular area fI, and the X coordinate value of the current coordinate value of vI is within the
If it is smaller than the minimum value of the coordinates (referred to as position detection result (2)), the Y coordinate value of the current location tIA value is smaller than the minimum value of the Y coordinates of the rectangular area, or larger than the maximum value of the Y coordinates, or a position detection circuit (3) that determines three types of positional relationships when the X coordinate value of the current coordinate value is larger than the maximum value of the X coordinates of the rectangular area (referred to as position detection result (3)); Leopard ranking using the judgment result of the circuit ■! Detection result (1) and previous position detection result (3)
a coordinate conversion circuit I that outputs the current coordinate value as it is in the case of the position detection result (2), and outputs the result after converting the X coordinate value of the current coordinate value to the minimum value of the X coordinates of the rectangular area; An address conversion circuit converts the coordinate values output from the previous coordinate conversion circuit into an address on the memory and a bit position on the address, and the determination result of the position detection port MI is converted into the position detection result ( 1) or the position detection result (2), and if the determination result of the coordinate comparison circuit determines that the current coordinate value needs to be drawn, the address and the bit position on the address are used to draw the memory. This is a memory control circuit that performs read and write operations.

Further, the vector font processing device of the present invention compares the positional relationship between the current coordinate value of the given x, yFi mark that is currently being drawn and the preceding coordinate value given one time before the current coordinate value. a coordinate comparison circuit that determines whether the current coordinate value needs to be drawn; and a coordinate comparison circuit that determines whether the current coordinate value needs to be drawn; (referred to as position detection result (1)) and the Y coordinate value of the current coordinate value is the Y value that the rectangular area has.
If the X coordinate value of the current coordinate value is within the range of the coordinate value and is smaller than the minimum value of the X coordinate of the rectangular area (referred to as position detection result (2)), the Y coordinate value of the current coordinate value is If the X coordinate value of the current coordinate value is within the range of the Y coordinate value of the rectangular area and is larger than the maximum value of the X coordinate value of the rectangular area (referred to as position detection result (4)), a position detection circuit II that determines four types of positional relationships when the Y coordinate value is smaller than the minimum value of the Y coordinate of the rectangular area or larger than the maximum value of the Y coordinate (referred to as position detection result (5)); , using the determination result of the position detection oF&n, in the case of the position detection result (1) and the position detection result (5), the current coordinate value is output as is, and in the case of the position detection result (2), the current coordinate value is output. The X coordinate value of the rectangular area is converted to the minimum value of the X coordinate and then output, and in the case of the position detection result (4), the X coordinate value of the current coordinate value is converted to the maximum value of the X coordinate of the rectangular leaning castle. Coordinate conversion circuit II that outputs after conversion, and the g! A coordinate address conversion circuit that converts the coordinate value output from the standard conversion circuit (■) into an address on the memory and a bit position on the address, and the determination result of the position detection circuit (■) is the position detection result (1) or the position Detection result (2) or the position detection result (
4) If the determination result of the coordinate comparison circuit is that the current coordinate value needs to be drawn, a memory control circuit that reads and writes to the memory using the address and the bit position on the address. It is equipped with the following.

Operation With the above configuration, the opening that provides the coordinate values for drawing the outline of the character simply performs the process of providing the coordinate value for drawing the outline of the character, and scans the memory horizontally from the left side, While converting all dots from the appearance of a black dot to the appearance of the next black dot on the same scanning line to black, the rectangular area transformed by the coordinate transformation circuit is converted using the determination result of the position detection circuit. The filling process is performed from the minimum value of the X coordinate that the rectangular area has.Therefore, there is no need to judge and process the deletion and addition of black dots to fill the rectangular area, simplifying and speeding up the control on the side that provides the coordinate values. It becomes possible to aim for.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

@ Figure 1 shows a configuration diagram of a system including a vector font drawing device according to the first embodiment of the present invention. In a rectangular area specified by the current coordinate value of and the coordinate value of two points, if the current coordinate value is within the rectangular area (referred to as position detection result (1)), and the X coordinate value of the current coordinate value is within the range of the X coordinate values of the v1 rectangular area and the X coordinate value of the current coordinate value is smaller than the minimum value of the X coordinates of the rectangular area (referred to as position detection result (2)); The X-coordinate value of the coordinate value is smaller than the minimum value of the Y-coordinate of the rectangular area, or the Y-coordinate is greater than the maximum value, or the X-coordinate value of the current coordinate value is of the X-coordinate of the rectangular area. When the value is larger than the maximum value (referred to as position detection result (3)), three types of positional relationships are determined. Reference numeral 15 denotes a coordinate conversion circuit ■, which converts the position detection result (1) using the judgment results of the position ylL detection circuits Jl and I.
In the case of the position detection circuit (3), the current coordinate value is output as is, and in the case of the position detection result (2), the X coordinate value of the current coordinate value is converted to the minimum value of the X coordinate of the rectangular II area. Output later. 2 is a coordinate comparison circuit. When there is only a black dot 1a in the filling direction, such as a sharp edge of a character (character pattern) (hereinafter referred to as a 1-dot sharp edge), when filling is performed, the dot position after that dot position is If the inconvenience of filling in all dots occurs, or if there are black dots (hereinafter referred to as intermediate points) lined up to connect the black dot at the starting point of filling and the black dot at the ending point, the starting point will be on the same scanning line. When the total number of end points and intermediate points is an odd number, there may be an inconvenience that parts that do not need to be filled in are filled in. Write permission is given to the memory control circuit 16 based on the previous coordinate value given one time before the current coordinate value and the current coordinate value. 3 is a coordinate conversion circuit 115;
The output coordinate values are converted into an address on the memory 6 and a pit position on the address. Memory control circuit 16
If the judgment result of the position detection result unit 14 is the position detection result (
1) or the position detection result (2), and if the determination result of the coordinate comparison circuit 2 grants permission for writing, reading and writing of the memory 6 is performed using the address and the pit position on the address.

19 is filled processing 01? At frI, the memory 6 is scanned horizontally from the left side, and all dots from the appearance of a black dot to the appearance of the next black dot on the same scanning line are converted to black. Reference numeral 17 denotes a filling control circuit which controls fJ so that only the rectangular area is filled.

18 is a register, 1? JM holds the previous coordinate value, the current coordinate value, and the coordinate values of two points indicating the rectangular area. 20 is a vector font drawing device according to an embodiment of the present invention constructed from 2.3.14 to 16 above! It is.

The operation of the system including the vector font drawing device according to the first embodiment configured as described above will be described below.

In FIG. 1, when the person providing the coordinate values for drawing the outline of a character sequentially gives the coordinate values (XN, YN) indicating the outline of the entire character A in FIG. 5 to the register 18,
The position detection circuit 14 receives coordinate values (XN, YN), coordinate values (XA, YA), coordinate values (XB,
YB), and depending on the result, the following three types of processing are performed.

1) The coordinate values (XN, YN) are inside the rectangular area (XA≦
If XN; XB and YA≦YN≦YB) (lrl
Ha rank! corresponding to the detection result (1)), the coordinate conversion circuit 115 converts the coordinate value (XN.

The coordinate address conversion circuit 3 converts the coordinate values (XN, YN) into an address on the memory 6 and a bit position on the address. At this time, if the coordinate comparison circuit 2 determines that the coordinate values (XN, YN) are other than the sharp edge of one dot or the black dot at the midpoint, the memory control circuit 16 uses the address to 2 and 11 of the address on the data.
Same bit position as mentioned above! The value of the bit is inverted and written to the same location on the memory 6.

2) Coordinate i! ! < X , '; , YN ) and coordinates @ (XA, YA), coordinates @ (
XB.

)′B) When the relationship XN<XA and YA≦YN≦YB (corresponds to the position detection result (2)), the coordinate conversion circuit 115 calculates the position gl<XN.

YN)S-(XA, YN) and output.

The subsequent operations are the same as those shown in 1).

3) Specify coordinate values (XN, YN) and rectangular area ■・Coordinate values <XA, YA), coordinate values (XB).

If the relationship of YB) is other than those shown in 1) and 2) (corresponding to the position detection result (3)), no write operation is performed to the memory 6.

However, it is assumed that there is no black dot in the memory 6 before the outline is drawn.

Figure 9 shows the outline of the rectangular area ■ in Figure 5 using the vector phone) and drawing device 2° in Figure 1.
Mo',,' 6: Two refusals, - this 7>
'), the range of 13v 2 squares 3 areas ↓ is l.

If you want to perform the lightning attack-barrel in Figure 9, use Figure 1's 1.16゜6□1゜□5, A5, 8, and 1,6. ,. :Ka1
．． . , 41.6 From □□, after o 7, 1 appears, the next black dot I appears;, the dot of M t t = l c:
□t8□ No. 51. ．． 716, Yo, 11 By controlling the control circuit 17 so that when it scans to the right outer □ of the range 13 of the rectangular area S, the filling process is not performed □ after that, a rectangle as shown in Section 7 is created. Here are the results of correctly rubbing and respecting the area S゛.
1 can be done.
'Also, the width of the rectangular area is 1 dot (the width of the rectangular area is 3 fingers).
:□ If the coordinates of the two points to be determined have the same X coordinate values)
1 shows that the contour obtained by the vector font drawing device 20 in Fig. 1 is the result of filling.
□. 21. □Yo□Yo, yo. 252. You need to do it.

According to the first example above, the side that provides the coordinate values for drawing the outline of the character does not have to judge and process the deletion and addition of black dots for flattening the rectangular area. It is only necessary to perform a process of providing coordinate values for drawing the outline of a character on the leather, and the control on the side that provides the coordinate values is simplified and speeding up can be achieved.

FIG. 2 shows a top view of a system including a vector font drawing device according to a second embodiment of the present invention. In FIG. , in a rectangular area specified by the current coordinate value of Yilj and the coordinate value of two points, if the current coordinate value is within the rectangular area (referred to as position detection result (1)),
If the X coordinate value of the current coordinate value is within the range of the X coordinate values of the rectangular area and the X coordinate value of the current coordinate value is smaller than the minimum value of the X coordinates of the rectangular area (position detection result (2) ), and the X coordinate value of the current coordinate value is within the range of the X coordinate values of the rectangular area, and the X coordinate value of the current coordinate value is greater than the maximum value of the X coordinates of the rectangular area. (referred to as position detection result (4)) and the current coordinate value (referred to as position detection result
□ Determine the relationship between the positions of Ka (5) and Hayashi (Su) in 4 ways.
・□24 is the position detection circuit [2
Judgment result of step 3: Use the result to determine the position detection result (1
) and said position detection □In case of output result (5), output said current coordinate value as is □and said position detection result (2)
In the case of FI, the X coordinate value of the current E coordinate value is converted to the minimum value of the X coordinate of the vI proof rectangular area and then output. In the case of the position detection result (4), lfJ' is the X coordinate value of the current oak marker value. is converted to the maximum value of the X coordinate of the rectangular area and then output. 25 is a memory control circuit in which the judgment result of the position detection circuit 1123 is the position detection result (1) or the position detection result (2) or the position detection result (4), and the judgment result of the superimposition comparison circuit 2 is When permission for writing is granted, the memory 6 is read and written using the address VI and the above and γ positions on the address. 22 is a filling processing circuit 2, which scans the memory 6 in the horizontal direction, All dots from the time a male dot appears until the next black dot appears on the same scanning line are converted to black.

2- is a vector font drawing system in -XuM of the present invention which was paddled by 2.3.23-25! 2.3.6.18 are the same as the embodiment of the present invention shown in FIG.

The operation of the system including the vector font drawing device in the second embodiment configured as described above will be described below.

In Figure 2, 9fIA for drawing the outline of the character
When the value provider gives the coordinates a@(XN, YN) indicating the outline of the entire letter A in Figure 5 to the register 18, the position detection circuit I [23 will be the coordinate value (XN, YN). Coordinate values (XA, YA>, coordinate values (
XB, YB), and based on the results, the following 4
The process is carried out as expected.

1) The coordinate values (XN, YN) are inside the rectangular area (XA≦
If XN≦XB and YA≦YN≦YB (corresponding to the position detection result (1)), the coordinate conversion circuit lI2
4 is the coordinate value (XN.

YN) is output as is, and the coordinate address conversion field EL! 1
3-゛゛2 Standard value (XN,)'N) in memory 6? Change I6 to address and bit position on said address! do. At this time, the coordinates @ (XN, YN
) is 1 bit sharp! When it is determined that there is a man dot at the end and an open voice [lid], the memory control times F! @25 reads the data on the memory 6 using the address, inverts the value of the bit at the same position as the bit position of the address on the data, and writes it to the same position on the memory 6.

2) Coordinate values (XN, YN) and coordinate values (XA, YA) and coordinate values (XB) that assume a rectangular area.

)′B) If the relationship XN<XA and YA≦YN≦YB (corresponds to the position detection result (2)), the coordinate conversion circuit [24 is the coordinate @ (XN.

)'N) is converted to <XA,'r'N) and output.

The subsequent operations are the same as those shown in 1).

3) Coordinate values (XN, YN) and coordinate values (XA, YA) that specify the rectangular area (XB).

When the relationship of XB<XN and YA≦YN≦YB (corresponds to the position detection result (4) described in llil), the coordinate conversion circuit I[24 converts the coordinate value (XN.

Convert YN) to (XB, YN) and output.

The subsequent operations are the same as those shown in 1).

4) Coordinate values (XN, YN) and coordinate values (XA, YA) that specify the rectangular area (XB).

If the relationship of YB) is other than those shown in 1), 2), and 3) (
(corresponding to the position detection result (5)), no write operation is performed on the memory 6.

However, it is assumed that no dots exist in the memory 6 before the outline is drawn.

FIG. 10 is a diagram in which the outline of the rectangular area (■) in FIG. 5 is drawn in the memory 6 in FIG. 2 using the vector font drawing device 21 in FIG. be.

When performing the 1021st filling process, the filling process circuit I22 of FIG. 2 is used to scan the memory 6 in one horizontal direction, and after a black dot appears on the same scanning line, the next black dot, h By performing the process of converting all dots until they appear into black, it is possible to obtain a result in which the rectangular area (2) shown in FIG. 7 is correctly filled in.

Also, the width of the rectangular area is 1 dot (2 dots specifying the rectangular area).
In a special case where the X coordinate values of the coordinate values of the points are equal), the system including the vector font drawing device in one embodiment of the present invention shown in FIG. 2 is not used.

According to the second embodiment, in the filling process, the memory 6 is scanned in one horizontal direction, and all dots from the time a black dot appears on the same scanning line until the next black dot appears are converted to black. This simplifies the filling process control and makes it possible to achieve higher speed. Further, other effects are the same as those of the first embodiment.

FIG. 3 shows a configuration diagram of a system including a vector font drawing device according to a third embodiment of the present invention. In FIG. If the width of the area is 1 bit, the position detection circuit (4) of the position detection circuit] 123 described in the second embodiment is connected to the position detection port (4). 5), 27 performs control to change to 2. 3
．． 16. This is a vector font drawing device according to an embodiment of the present invention, which is configured by 23 to 26. A few more
, 6, 18 degrees 22-25 are the same as the embodiment of the present invention shown in FIG.

The operation of the system including the vector font drawing device according to the third embodiment configured as described above will be described below.

In a special case where the convergence of a rectangular area is 1 dot (the X coordinate values of the two points specifying the rectangular area are equal), it is difficult to correctly draw the outline in a system that includes the vector font drawing device shown in Figure 2. This causes the inconvenience of not being able to draw.

The contents will be explained below using an example.

Figure 11 shows a diagram with a triangular outline. In Figure 11, 28 is the outline of the triangle, 29 is a rectangular area with a width of 1 dot, and 31 is the upper ia value specifying the rectangular area with a width of 1 dot. (XC, YC1), 32 is the lower coordinate value (XC, 'y'c2) that specifies the 1-dot width rectangular area.
, 30 is the area containing the outline of the triangle, 9 is @3
The origin (0,0) is indicated by the coordinate value at the top left of 30, and 12
are the coordinate values (XN, YN) of each black dot given for drawing the outline 28 of the triangle.

Now, when the vector font drawing device 21 of FIG. 2 is used to draw the outline of the rectangular area 29 of one dot width shown in FIG. Drawing at the same position an even number of times in order to invert the value of the corresponding bit in the memory 6 is the same as not drawing anything. Furthermore, the following can be said about the positional relationship between the entire outline and the rectangular area 29 having a width of one dot.

The Y position is within a rectangular area 29 with a value of 1 dot width (YC1≦YN
≦Y C2), and there are an odd number of coordinate values of contours with the same Y coordinate g value on both sides of the rectangular area 29 with a width of 1 dot, all the coordinate values on both sides are converted to (XC, YN). Therefore, the number of times drawing is performed at the same location in the memory 6 is an even number, which is the same as not drawing anything. As shown above, in a special case where the width of a rectangular area is one dot (the X coordinate values of the two points specifying the rectangular area are equal), the vector font drawing device shown in Figure 2 is used. In the system, a disadvantage arises in that the contour cannot be drawn correctly.

The above problem can be solved by the specified area determination circuit 26 in the vector font drawing device 27 shown in FIG.

If the specified area determination circuit 26 determines that the width of the rectangular area is 1 dot (the X coordinate values of the coordinate values of the two points specifying the rectangular area are equal), the outline shown in the second embodiment is Avoid performing 3) of the four drawing operations,
The position detection port path 1123 performs 4) instead of 3).
In addition, the fill processing circuit n2 is used to control the outline drawn by the vector font drawing device 27 so as not to perform the filling process.
Control 2.

When the width of the rectangle mkl is other than one dot, the operation is the same as that shown in the second embodiment.

According to the third embodiment, the width of the rectangular area is 1 dot (
Even in special cases such as when the coordinate values of two points specifying a rectangular area have the same X-coordinate WA values, it is now possible to draw a contour for filling, and other effects are shown in the second embodiment. The effect is the same.

Effects of the Invention As described above, according to the present invention, the side that provides coordinate values for drawing the outline of a character can simply delete and add black dots to fill in a rectangular area without having to judge and process them. It is only necessary to perform the process of providing coordinate values for drawing the outline of a character, and the control on the side that provides the coordinate values is simplified and speeding up can be achieved.

[Brief explanation of drawings]

1 to 3 are block diagrams of a system including a vector font drawing device in the first to third embodiments of the present invention, FIG. 4 is a block diagram of a system including a conventional vector font drawing device, and FIG. The figure is a diagram in which the character A is divided into nine parts from the rectangular area ■ by ■. Figure 6 is a diagram in which the outline of the rectangular area ■ in Figure 5 is drawn in memory using the conventional vector font drawing device in Figure 4. Figure 7 shows the correct filling of the rectangular area ■ in Figure 5 in memory, and Figure 8 shows the outline in Figure 6 to obtain the filling result as shown in Figure 7 when filling in the horizontal direction. Figure 9 is a diagram created by deleting and adding black dots, Figure 9 is a diagram using the Nohector font drawing device shown in Figure 1 to draw the outline of the rectangular area ■ in Figure 5 in memory, Figure 10 is a diagram created by adding and deleting black dots. Figure 2 shows the outline of the rectangle flkA in Figure 5 drawn in memory using the vector font drawing device, and Figure 11 shows the outline of the triangle.
...Write control circuit, 2...Coordinate comparison circuit, 3...
・Coordinate address conversion circuit, 6...Memory, 9...Origin <0.0), 10...Upper left coordinate value (XA, YA) specifying the rectangular area ■ in Figure 5, 11...・Bottom right coordinate values (XB, YB) specifying the rectangular area ■ in Figure 5, 1
2... Coordinate values (XN, YN) of each black dot given for drawing the outline, 13... Range of rectangular area ■ in Figure 5, 14... Position detection circuitry, 15.・
・Coordinate conversion circuit engineering, 16...Memory control circuit, 17.
...Filling control circuit, 18...Register, 19...
- Filling processing time BI, 20...Vector 7 ont drawing device in the first embodiment, 21...Vector font drawing device in the second embodiment! , 22... News crusher IN! Circuit ■, 23,... Position detection circuit ■, 24...
・・Coordinate conversion circuit ■, 25 ・・Memory control circuit, 26
. . . Designated area determination circuit, 27 . . . Vector font drawing device in the third embodiment. Agent Yoshi Morimoto Private use Figure 1 Figure 2/I? Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 < [ t3 13 Figure S Figure 9〆't3 〆3 Figure 1O

Claims (1)

[Scope of Claims] 1. Compare the positional relationship between the current coordinate values of the given X and Y coordinates that are the current drawing target and the preceding coordinate values given one time before the current coordinate values, and a coordinate comparison circuit that determines whether a coordinate value needs to be drawn; and a coordinate comparison circuit that determines whether a coordinate value needs to be drawn; (1
), and the Y coordinate value of the current coordinate value is within the range of Y coordinate values of the rectangular area, and the X coordinate value of the current coordinate value is smaller than the minimum value of the X coordinates of the rectangular area ( position detection result (2)) and the Y-coordinate value of the current coordinate value is smaller than the minimum Y-coordinate value of the rectangular area, or larger than the maximum Y-coordinate value, or the X-coordinate value of the current coordinate value is A position detection circuit I that determines three types of positional relationships when the X coordinate of the rectangular area is larger than the maximum value (referred to as position detection result (3)), and a position detection circuit I that uses the determination result of the position detection circuit I. In the case of the position detection result (1) and the position detection result (3), the current coordinate value is output as is, and in the case of the position detection result (2), the X coordinate value of the current coordinate value is output as the X coordinate of the rectangular area. a coordinate conversion circuit I that outputs after converting it to the minimum value of
A coordinate address conversion circuit converts the coordinate value output from I into an address on the memory and a bit position on the address, and the judgment result of the position detection circuit I is the position detection result (1) or the position detection result ( 2) If the determination result of the coordinate comparison circuit is that the current coordinate value needs to be drawn, a memory control circuit that reads and writes to the memory using the address and the bit position on the address. A vector font drawing device with 2. It is necessary to compare the positional relationship between the current coordinate values of the given X and Y coordinates that are the current drawing target and the preceding coordinate values given one time before the current coordinate values, and draw the current coordinate values. a coordinate comparison circuit that determines if the current coordinate value is within the rectangular area specified by the current coordinate value and the coordinate values of two points (position detection result (1);
)) and the Y coordinate value of the current coordinate value is within the range of Y coordinate values of the rectangular area, and the Y coordinate value of the current coordinate value is smaller than the minimum value of the X coordinate of the rectangular area ( (referred to as position detection result (2)) and the Y coordinate value of the current coordinate value is within the Y coordinate value range of the rectangular area, and the X coordinate value of the current coordinate value is the maximum of the X coordinate values of the rectangular area. (referred to as position detection result (4)) and when the Y coordinate value of the current coordinate value is smaller than the minimum value of the Y coordinate of the rectangular area or larger than the maximum value of the Y coordinate (referred to as position detection result). In the case of the position detection result (1) and the position detection result (5), the position detection circuit II determines the four positional relationships (referred to as (5)), and the determination result of the position detection circuit II is used. The current coordinate value is output as is, and in the case of the position detection result (2), the X coordinate value of the current coordinate value is converted to the minimum value of the X coordinates of the rectangular area and then output, and the position detection result (4) is output. In this case, a coordinate conversion circuit II converts the X coordinate value of the current coordinate value to the maximum value of the X coordinate of the rectangular area and then outputs the result, and the coordinate value output from the coordinate conversion circuit II is converted to the address on the memory and the coordinate value outputted from the coordinate conversion circuit II. A coordinate address conversion circuit that converts into a bit position on an address and a determination result of the position detection circuit II are the position detection result (1), the position detection result (2), or the position detection result (
4) If the determination result of the coordinate comparison circuit is that the current coordinate value needs to be drawn, a memory control circuit that reads and writes to the memory using the address and the bit position on the address. A vector font drawing device with 3. It is determined that the width of the rectangular area specified by the coordinate values of the two points is 1 bit, and if the width of the area is 1 bit, the position detection result (4) of the position detection circuit II is used as the position detection result. 3. The vector font drawing device according to claim 2, further comprising a designated area determination circuit that performs control to change to (5).