JP2780384B2 - Contour editing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for processing an outline font formed by expressing the outline of a two-dimensional graphic with a closed curve, and in particular, to an outline editing apparatus for editing an outline font. About.

[Summary of the Invention] The present invention provides a contour line editing apparatus, in which two points on a closed curve constituting a contour of a figure are specified on the same closed curve or on two different closed curves. If two points are present on two different closed curves, a process is performed to combine the two closed curves into one closed curve. If two points are present on the same contour line, this process is performed. A process for dividing one closed curve into two closed curves is performed.

[Prior art] Conventionally, as a method of expressing a figure such as a character font,
A method of expressing the outline of a figure by vector data, a so-called outline font method, is known.

FIG. 3A shows a graphic of the character font "A", which is represented by two closed curves (contours). FIG. 5A shows a graphic obtained by extracting a part of a certain character font, and this graphic is represented by only one closed curve.

By the way, when the font shown in FIG. 3 (A) or FIG. 5 (A) is edited to the font shown in FIG. 3 (B) or FIG. 5 (B), the number of closed curves, that is, the number of contour lines increases or decreases. I will be.

Conventionally, such font editing has been performed by a method such as insertion, deletion, or movement.

[Problems to be Solved by the Invention] However, such an editing method has a disadvantage that the editing operation is extremely troublesome, and the editing operation cannot be performed efficiently.

Therefore, it is clear that the editing operation can be performed efficiently if the editing can be performed with simple instructions so that the number of closed curves constituting the outline of the font increases or decreases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an editing method in which the number of closed curves constituting the outline of a font is increased or decreased by simply designating two points on an arbitrary closed curve.

[Means for Solving the Problems] The means of the present invention are as follows.

The designating means 1 (refer to the functional block diagram of FIG. 1; the same applies hereinafter) is used to edit an outline font formed by expressing the outline of a two-dimensional graphic with a closed curve, and to edit two points existing on the closed curve. A mouse or a keyboard using a crosshair cursor as a pointing device to be designated is used.

The determining means 2 determines whether the two points specified by the specifying means 1 exist on different closed curves or on the same closed curve.

When the determining means 2 determines that the two closed curves exist on different closed curves, the combining processing means 3 performs a process of combining the two different closed curves into one closed curve.

When it is determined by the determination means 2 that they exist on the same closed curve, the division processing means 4 performs processing for dividing this one closed curve into two closed curves.

[Operation] The operation of the means of the present invention is as follows.

 Hereinafter, description will be made with reference to specific examples of FIGS. 3 and 5.

Now, when editing the font shown in FIG. 3 (A) into the font shown in FIG. 3 (B), that is, when editing a font consisting of two closed curves into a font consisting of one closed curve, As shown in the figure, two points a and b are designated by the designation means 1.

In this case, since the designated two points a and b exist on two different closed curves, the determination means 2 determines that. Then, the combining processing unit 3 performs a process of combining the two closed curves into one closed curve. as a result,
The two closed curves are joined along the line connecting the two points a and b shown in FIG. 3 (A), and a font consisting of only the closed curves is obtained as shown in FIG. 3 (B).

When the font shown in FIG. 5A is edited into the font shown in FIG. 5B, that is, when a font consisting of one closed curve is edited into a font consisting of two closed curves, As shown in the figure, two points a and b are designated by the designation means 1.

In this case, since the two designated points a and b exist on one and the same closed curve, the determination means 2 determines that. Then, the division processing means 4 performs a process of dividing this one closed curve into two closed curves. As a result, one closed curve is divided along the line connecting the two points a and b shown in FIG. 5A, and a font composed of two closed curves is obtained as shown in FIG. 5B.

Therefore, when editing such that the number of closed curves constituting the outline of the font increases or decreases, the editing can be performed only by designating two points on an arbitrary closed curve.

Embodiment An embodiment will be described below with reference to FIGS. 2 to 19.

FIG. 2 is a block diagram showing the configuration of the contour line editing device.

The CPU 11 controls the operation of the contour line editing device in accordance with the editing program stored in the program memory 12.When a font editing command is given from the keyboard 13 via the keyboard control unit 14, the CPU 11 changes the font memory. A process for editing outline font data stored in 15 using the work memory 16 and the address management unit 17 is performed. In this case, font memory 15
Is displayed on the CRT display device 19 via the display control unit 18. When two points on the font are designated from the coordinate input unit 20, the CPU 11 Performs editing processing.

The address management unit 17 has a configuration having various registers.
Point registers a and b store the addresses on the font memory 15 corresponding to the two points specified by the coordinate input unit 20, and the start point register S1 and the end point register E1 are the start points on one closed curve. Stores the address on the font memory 15 corresponding to S1, the end point E1, and furthermore, the start point register
The S2 and end point register E2 stores addresses on the font memory 15 corresponding to the start point S2 and the end point E2 on another closed curve. The address register i stores the write / read address of the font memory 15, and the address register ix
Stores a write / read address of the work memory 16 or the like.

4 (A) and 4 (B) show the points constituting the outline of the outline font shown in FIGS. 3 (A) and 3 (B), and a straight line between the points shown. Alternatively, the outline font shown in FIGS. 3A and 3B is reproduced by interpolation with a curve.

In this embodiment, the order in which the points constituting the closed curve are arranged is clockwise in the contour line (outer ring line) of the portion blackened inside, and counterclockwise in the contour line (inner ring line) with white inside. It is predetermined to be clockwise. This is to simplify the editing process, and does not necessarily have to be the same. This is because when the editing instruction is given, the method of determining whether the contour to which the specified point belongs is the outer contour or the inner contour, or if there is data for each point, change the method of rotating the contour before starting editing That is because it is good.

FIGS. 7A and 7B show data formats on the font memory 15 for storing data of respective points corresponding to FIGS. 4A and 4B, wherein A (n), X ( n) and Y (n) represent an attribute of each point and an X coordinate value and a Y coordinate value indicating the position of each point. The point where the value of the attribute A (n) is “1” indicates a closed curve, the start point of, the point of “2” indicates the end point, and “0” is a point between the start point and the end point. Is shown. When the value of the attribute A (n) is "-1", it indicates the end of the font data. X (n), Y
The value of (n) is a plane coordinate value of each point.

FIGS. 6 (A) and 6 (B) show points constituting the outline of the outline font shown in FIGS. 5 (A) and 5 (B), and a straight line is provided between the points shown. Alternatively, the outline font shown in FIGS. 5A and 5B is reproduced by interpolation with a curve. In this case as well, the order in which the points constituting the closed curve are arranged differs depending on the outer ring line and the inner ring line as described above.

4 (B) and FIG. 6 (B), the point "1"
"2" and "12 '", "8" and "8'" or "4" and "4 '", "8" and "8'" are the same position data in the font memory 15, but after editing, The process of moving each point to the illustrated position can be easily realized by a known technique.

FIGS. 8A and 8B show the data format on the font memory 15 for storing the data of each point corresponding to FIGS. 6A and 6B.

FIG. 9 shows the configuration of the work memory 16, in which WA
(N), WX (n) and WY (n) represent the attribute of each point read from the font memory 15 and the X coordinate value and the Y coordinate value indicating the position of each point.

Next, the operation of this embodiment will be described with reference to FIGS.

FIG. 10 is a general flowchart showing the entire operation of the contour line editing process.

Now, when the font shown in FIG. 3 (A) is edited into the font shown in FIG. 3 (B) (combination of closed curves), and the font shown in FIG. 5 (A) is changed to the font shown in FIG. The case of editing (dividing a closed curve) will be specifically described as an example.

In this case, as shown in FIGS. 3 (A) and 5 (A), two points a and b on an arbitrary contour are specified from the coordinate input unit 20, and then an editing command is given from the keyboard 13. Then, the editing process according to the stable state of the two points is performed. Here, since two points are on two different closed curves in FIG. 3 (A), a process of connecting the two closed curves to one closed curve is performed, and in FIG. 5 (A), the two points are the same. Since it is on a closed curve, a process of dividing the closed curve into two closed curves is performed. As a result, as shown in FIGS. 3 (B) and 5 (B), in any case, an edit result is obtained in which the character "black" is cut off along the line connecting the two points a and b. Can be

 Hereinafter, the editing process will be described in detail with reference to FIG.

That is, in response to the edit command, the operation according to the flowchart of FIG. 10 is started.

First, since the addresses on the font memory 15 corresponding to the two points a and b input and specified from the coordinate input unit 20 are set in the a point registers a and b point registers b in the address management unit 17, If the value is not a <b, the value of the a-point register a is stored in the b-point register b, and the value of the b-point register b is stored in the a-point register unless a <b. a and the addresses are exchanged with each other (step A2).

Then, the value of the point a register a is taken into the N register in the CPU 11 (step A3), and based on this value, a closed curve detection process is executed according to the subroutine of FIG. 11 (step A4). As a result, the start point S and the end point E of the closed curve having the point a are obtained, and are set in the start point register S1 and the end point register E1 in the address management unit 17 (step A5).

Similarly, the value of the point b register b is fetched into the N register (step A6), and based on this value, a closed curve detection process is executed according to the subroutine of FIG. 11 (step A7). As a result, the start point S and the end point E of the closed curve having the point b are obtained, and are set in the start point register S2 and the end point register E2 in the address management unit 17 (step A).
8).

Then, in the next step A9, the values in the start point registers S1 and S2 are compared. That is, it is determined whether the start point of the closed curve having the point a is equal to the start point of the closed curve having the point b, that is, whether the points a and b are on the same contour line.
If the points a and b are on the same closed curve, the closed curve is divided (step A10), and if they are on two different closed curves, the closed curve is combined (step A11).

FIG. 11 is a flowchart detailing the details of the closed curve detection processing shown in steps A4 and A7 in FIG.

This detection processing is based on the value of the point a or the point b set in the N register and the starting point S of the closed curve to which they belong.
And the end point E from the font memory 15 in steps B1 to B4.
B8 indicates an end point detection process.

That is, in steps B1 to B4, the value of the N register is set in the address register i in the address management unit 17, and then the font memory 15 is accessed while decrementing the value of the address register i by "1". Area A of the font memory 15 specified by the value of
The attribute data is read from (i), and it is checked whether it is "1" indicating the start point of the closed curve. As a result, A
If (i) = 1, the value of the address register i is the starting point S.

Therefore, in the case of the data example shown in FIG.
For example, if the value of the N register is “n = 8”, the font memory 15 is accessed while decrementing the address by “−1” from this value. As a result, when A (i) = 1 is detected, The value of the register i is “n = 1”, and this value is the starting point.

Similarly, in steps B5 to B8, the value of the N register is set in the address register i, and then the value of the address register i is incremented by "1", and the font memory 15 is incremented.
Is read from the attribute area A (i) of the font memory 15 designated by the value of the address register i, and it is checked whether or not it is "2" indicating the end point of the closed curve. , A (i) = 2, the value of the address register i is the end point E.

Therefore, in the case of the data example shown in FIG.
For example, if the value of the N register is “n = 8”, “n = 1
The value of "0" is the end point.

FIG. 12 is a flowchart detailing the closed curve dividing process shown in step A10 of FIG.

FIG. 13 is a diagram for schematically illustrating the concept of the closed curve division processing shown in FIG. That is, the font data of the closed curve on the right side of the line connecting the two points a and b specified in FIG. 13A is extracted in steps C1 to C9 in FIG. 12 and written into the work memory 16 (see FIG. (See Fig. 13 (B))
Subsequently, the font data of the closed curve on the left side is extracted in steps C10 to C14 in FIG. 12 and written into the work memory 16 (see FIG. 13C). That is, one closed curve is divided into two closed curves along two points a and b,
Transferred to 16. Then, the font data of FIG. 13B in which the closed curve font data (data before editing) in the font memory 15 shown in FIG. Fig. 13 (C)
Is replaced by the font data. Thus, the data in the font memory 15 is edited into a desired font.

Hereinafter, the closed curve division processing will be described in further detail according to the flowchart of FIG.

In this embodiment, WA (ix), WX (ix),
WY (ix), X (S1), Y (S1), X (i), Y (i),
X (a) and Y (a) are defined as follows.
That is, WA (ix), WX (ix), and WY (ix) are the attribute area of the work memory 16 specified by the value of the address register ix, X
Represents a coordinate area and a Y coordinate area. Also, X (S1),
Y (S1) represents the X coordinate area and Y coordinate area of the font memory 15 specified by the value of the start point register S1, and similarly, X (i), Y (i) or X (a), Y (a) Represents an X coordinate area and a Y coordinate area of the font memory 15 specified by the value of the address register i or the value of the a point register a.

Now, a case in which the font of FIG. 5A is edited to the font of FIG. 5B will be described with reference to FIGS.

In this case, two points a and b are designated on one closed curve,
As shown in FIG. 6 (A), point a is at position "4" and point b is at position "8".

In this state, first, an initial value "1" is set in an address register ix specifying the work memory 16 (step C1). As a result, the address "1" of the work memory 16 is designated, "1" indicating the start point of the closed curve is set in the attribute area WA (ix), and the X coordinate area WX
In (ix), the X coordinate value read from the area X (S1) of the font memory 15 is set, and further, the Y coordinate area WY
In (ix), the Y coordinate value read from the area Y (S1) of the font memory 15 is set, and then the value of the address register ix is incremented (step C2). As a result, the font data (x ₁ , y ₁ ) at the start point “1” shown in FIG.

Next, "1" is added to the value of the start point register S1, and the value is transferred to the address register i (step C3). Then, while incrementing the values of the address registers i and ix by one, the X coordinate area X of the font memory 15 is maintained until the value of the address register i reaches the value of the point a register a.
(I) A process of writing data in the Y coordinate area Y (i) to the X coordinate area WX (ix) and the Y coordinate area WY (ix) of the work memory 16 is performed (steps C4 and C5). In this case, data of "0" is written in each attribute area WA (ix) of the work memory 16. As a result, the font data (x ₂ , x ₂ ) of points “2”, “3”, and “4” shown in FIG.
(y ₂ ), (x ₃ , y ₃ ), (x ₄ , y ₄ ) are sequentially written to the work memory 16.

Next, the value of the point b register b is set in the address register i (step C6). As a result, the value of the address register i is changed from "4" to "8". Then, while incrementing the values of the address registers i and ix, while the value of the address register i is less than the value of the end point register E1,
The data in the X coordinate area X (i) and the Y coordinate area Y (i) of the font memory 15 are stored in the X coordinate area of the work memory 16.
A process of writing to the WX (ix) and Y coordinate areas WY (ix) is performed (steps C7 and C8). Work memory also in this case
Data of "0" is written in each of the 16 attribute areas WA (ix). As a result, the point “8” shown in FIG.
The font data of “9” (x ₈ , y ₈ ) and (x ₉ , y ₉ ) are sequentially written to the work memory 16.

Thus, the value of the address register i is
When the value of E1 is reached, the process proceeds to step C9, where the work memory 16
Is set in the attribute area WA (ix) of the font memory 15 to indicate the end point of the closed curve, and the area X (i), Y
Data read from _{(i) (x 10, y} 10) the area of the work memory 16 WX (ix), set to WY (ix), then,
Increment the value of address register ix. As a result, the points "1", "2",
Closed curve font data indicated by "3", "4 '", "8", "9", and "10" are read from the font memory 15 and sequentially transferred to the work memory 16.

Then, the process proceeds to steps C10 to C14, in which a process of reading the font data of the remaining contour lines from the font memory 15 and sequentially transferring the font data to the work memory 16 is performed.

First, "1" indicating the starting point is set in the attribute area WA (ix) of the work memory 16, and the X coordinate area X in the font memory 15 indicated by the value "4" of the point a register a is set.
Data x ₄ from (a), data from Y coordinate area Y (a)
y ₄ is read and the areas WX (ix) and WY in the work memory 16 are read.
(Ix), and then increment the address register ix (step C10). Then, the value of the address register i is updated.
The address is updated by adding "1" to the value (step C11).

Then, the values of the address registers i and ix are incremented, and while the value is less than the value of the point b register b,
Area X of font memory 15 (i), Y (i ) in the data _{(x 5, y 5),} (x 6, y 6), a work memory (x _7, y ₇₎
Write to 16 areas WX (ix) and WY (ix) (step C1
2, C13). In this case, the area WA (ix) of the work memory 16
Are set to data "0". Thereafter, when the value of the address register i reaches the value of the point b register b,
Proceeding to step C14, the attribute area WA (i
The data of “2” indicating the end point is set in x), and the data (x ₈ , y ₈ ) in the areas X (i) and Y (i) of the font memory 15 are stored in the area WX (ix) of the work memory 16. , WY (i
Write to x).

As a result, the points “4”, “5”,
The font data of the closed curves indicated by “6”, “7”, and “8” are read from the font memory 15 and are stored in the work memory.
Transferred to 16 sequentially.

Then, the process proceeds to step C15 to perform a process of replacing the data of S1 to E1 according to the subroutine of FIG.

FIG. 16 shows the state before editing stored in the font memory 15.
The data from S1 to E1, that is, the data from the start point to the end point on the closed curve including the two points specified for editing in the work memory
16 shows a flowchart for performing a process of replacing the edited data in 16. In this case, before performing the above-described replacement processing, in steps D1 to D4, if data of another closed curve constituting the glyph to be edited is stored in the font memory 15, that is, all data until the end of the font data is stored. A process for writing to the work memory 16 is performed.

First, the values of the address registers i and ix are updated. In this case, the value of the address register ix is updated to “ix + 1” and the value of the address register i is updated to “E1 + 1” (step D1). In this case, the value of the address register i is “n = 11”, and the area A of the font memory 15 is
From (i), X (i) and Y (i), data (-1, 0,
0) is read out and the corresponding area WA of the work memory 16 is read.
(Ix), WX (ix), WY (ix) (step
D2). Then, the attribute area A (i) of the font memory 15
It is checked whether the data read from is "-1", that is, the end of the font data (step D3). If not, the process proceeds to step D4, where the values of the address registers ix and i are incremented, and the process returns to step D2. The above operation is repeated until the end of the font data is detected. However, since the end of the font data is now detected, the process proceeds to step D5.

Here, initial values are set in the address registers ix and i. That is, "1" is set in the address register ix, and the value of the start point register S1 is set in the address register i. And
The data in the work memory 16 is sequentially transferred to the font memory 15, and processing for replacing the font data before editing stored in the font memory 15 with the font data after editing is performed. That is, the area WA (i
x), WX (ix), and WY (ix) are read from the corresponding areas A (i), X (i), Y
The process of writing (i) (step D6) proceeds to step D8 until the end of the font data is detected in step D7, and is repeated while incrementing the values of the address registers ix and i by one.

As a result, the font data in the font memory 15 is edited from the font data shown in FIG. 6A to the font data shown in FIG. Therefore, as shown in FIG.
The font consisting of two closed curves is cut off along the line connecting the points a and b, and is changed to a font consisting of two closed curves as shown in FIG. 6 (B).

Next, referring to FIGS. 14 and 15, step A1 in FIG.
The process of combining the closed curves shown in 1 will be described in detail. FIG. 14 is a flowchart showing the process of joining closed curves, and FIG. 15 is a diagram schematically showing the concept of this joining process. That is,
As shown in FIG. 15 (A), when points a and b are specified one by one on two different closed curves, the two closed curves are
By connecting the points a and b, as shown in FIG.
Is written to. Such a closed curve joining process is executed by steps E1 to E15 in FIG.

Hereinafter, the process of combining closed curves will be described in further detail with reference to the flowchart of FIG.

Now, a case where the font shown in FIG. 3A is edited into the font shown in FIG. 3B will be described with reference to FIGS.

In this case, there are two closed curves, an outer contour and an inner contour, and a point b is designated for the closed curve and a point a is designated for the closed curve.
As shown in FIG. 4A, the point a is at the position "12" and the point b is at the position "8". In this case, since a> b, the tenth
At step A2 in the figure, the value of the a-point register a and the
Are exchanged with each other, and the value of the point a is “8” and the value of the point b is “12”.

Steps E1 to E5 are the same as steps C1 to C5 of the closed curve division processing shown in FIG. 12, whereby the font memory 15 outputs the value "1" of the start point register S1 to the value of the a point register a. XY coordinate value of up to the value "8" (x _1, y ₁₎ ~
(X ₈ , y ₈ ) are sequentially written to the work memory 16.

Then, the process proceeds to step E6, in which the value "8" of the address register i is changed to the value "12" of the b-point register b, and then the font memory is updated until the value of the address register i reaches the value "13" of the end point register E2. Data read from 15 (x
_12, y _12), sequentially written in the work memory 16 (x _13, y ₁₃₎ (step E7, E8). As a result, the font data of points "12" and "13" are written into the work memory 16 following the font data of points "1" to "8" shown in FIG. In this case, the attribute area of the work memory 16
"0" to indicate that WA (ix) has one closed curve
Is set.

Next, the value “13” of the address register i is changed to the value “11” of the start point register S2 (step E9). And
Data (x) read from the font memory 15 until the value of the address register i reaches the value “12” of the point b register b
_11, y _11), sequentially written in the work memory 16 (x _12, y ₁₂₎ (step E10, E11). In this case as well, data “0” is set in the attribute area WA (ix) of the work memory 16.

Subsequently, the value “12” of the address register i is changed to the value “8” of the point a register a (step E12). The data (x ₈ , y ₈ ) and (x ₉ , y ₉ ) read from the font memory 15 are stored in the work memory 16 until the value of the address register i becomes less than the value “10” of the end point register E 1.
(Steps E13 and E14).

Thus, the value of the address register i is
When the value of E1 becomes "10", the process proceeds to step E15, where the data of "2" indicating the end of the closed curve is set in the attribute area WA (ix) of the work memory 16, and the font memory 15
Data read from the (x _10, y ₁₀₎ of the work memory 16
Write to areas WA (ix) and WY (ix).

As a result, the points “1” to “8”, “12”, “13”, “11”, “12”,
Font data “8”, “9”, and “10” are sequentially written, and become data representing one closed curve.

Then, the process proceeds to step E16 to perform a process of deleting S2 to E2 according to the subroutine of FIG. 17, and then perform a process of replacing S1 to E1 according to the subroutine of FIG. 16 described above (step E17). Completed.

FIG. 17 is a flowchart for explaining in detail the deletion processing of S2 to E2 shown in FIG. Note that this deletion processing is performed from the data in the font memory 15 indicated by the value of the start point register S2 to the font memory indicated by the value of the end point register E2.
This is a process for deleting the data in 15.

First, the value (n = 11) of the start point register S2 is set in the address register ix as an initial value of the address registers ix and i, and the end point register E2 is set in the address register i.
A value (n = 14) obtained by adding "1" to the content (n = 13) is set (step F1). Next, font memory 15
The data in the areas A (i), X (i) and Y (i) are read out from the
x) and Y (ix) are written (step F2). Then, the content of the attribute area A (i) indicates the end of the font “−”.
1 (step F3), and proceeds to step F4 until the end of the font is detected.
After performing an increment process of adding “1” to the value of i, the process returns to step F2, and the same operation is repeated thereafter.

As a result, the read address of the font memory 15 is specified according to the value of the address register i, and the write address thereof is specified according to the value of the address register ix.
Subsequent font data is “n =
11 ”is overwritten sequentially. Therefore, data from “n = 11” to “n = 13” (data from S2 to E2) in the font memory 15 is deleted from the font memory 15 before editing.

Then, after the replacement processing of S1 to E1 is performed according to the subroutine of FIG. 16, the editing is completed.

FIGS. 18 and 19 are examples of another outline font. As in the case described above, when an edit command is given by designating the points a and b in each figure (A), the editing result shown in the figure (B) is obtained. This is an editing result in which the black portion of the character shape is connected by a line connecting point a and b. In the figure,
,... Indicate closed curves.

Therefore, in the present embodiment, it is possible to easily perform editing in which the black portions of the character shape are separated or connected only by designating the two points a and b.

[Effects of the Invention] The present invention is directed to editing such that two closed curves are combined into one or one closed curve is divided into two by the same designation method for designating two points on an arbitrary closed curve, that is, Editing such as increasing or decreasing the number of closed curves forming the outline of the font can be easily performed. In other words, the editing for cutting off or connecting the black portion of the character can be easily realized by a simple method of specifying two points.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of the present invention, FIGS. 2 to 19 show an embodiment, FIG. 2 is a block diagram showing a configuration of an outline editing process, and FIGS. 3 (A) and 3 (B). FIGS. 4A and 4B are diagrams showing examples of outline fonts, and FIGS. 4A and 4B are diagrams showing each point of an outline constituting the outline font in FIGS. 3A and 3B. 5 (A) and 5 (B) show examples of other outline fonts, FIG. 6 (A),
(B) is a diagram showing each point of the outline constituting the outline font of FIGS. 5 (A) and (B), FIG. 7 (A),
(B) is a diagram showing the data format on the font memory 15 corresponding to each point in FIGS. 4 (A) and (B).
(B) is a diagram showing the data format on the font memory 15 corresponding to each point in FIGS. 6 (A) and (B), FIG. 9 is a diagram showing the structure of the work memory, and FIG. FIG. 11 is a general flowchart showing the overall operation of the editing process.
Flow chart showing the detection processing of the closed curve shown in FIG. 10,
FIG. 12 is a flowchart showing the process of dividing the closed curve shown in FIG. 10, FIG. 13 is a conceptual diagram of this dividing process, FIG. 14 is a flowchart showing the process of combining the closed curves shown in FIG. FIG. 15 is a conceptual diagram of this combining process, FIG. 16 is a flowchart showing the replacement process of S1 to E1 shown in FIGS. 12 and 14, and FIG. 17 is a deletion of S2 to E2 shown in FIG. FIGS. 18 (A) and (B), and FIGS. 19 (A) and (B) are flowcharts showing the processing, showing other outline fonts. 11 ... CPU, 12 ... Program memory, 13 ... Keyboard, 15 ... Font memory, 16 ... Work memory, 17 ...
... Address management unit, 20... Coordinate input unit, a... A point register, b.

Claims (1)

(57) [Claims] 1. An apparatus for processing an outline font in which a contour of a two-dimensional figure is represented by a closed curve, a designating means for designating two points existing on the closed curve to edit the outline font, Discriminating means for discriminating whether the two points specified by the specifying means are present on different closed curves or on the same closed curve; and when the discriminating means determines that the two points are present on different closed curves, A combination processing unit that performs a process of combining two different closed curves into one closed curve; and a division that performs a process of dividing the one closed curve into two closed curves when the determination unit determines that the two exist on the same closed curve. A contour line editing apparatus comprising: processing means.