JP3358698B2 - Drawing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing apparatus for displaying a screen in units of dots, and more particularly to a drawing apparatus having a conversion function of converting the number of dots per unit length in a vertical direction and a horizontal direction for display.

[0002]

2. Description of the Related Art Conventionally, in a drawing apparatus for displaying a screen in units of dots, when converting the number of dots in the vertical and horizontal directions of the screen and displaying the converted image, a white bit is used for each bit corresponding to each dot. The processing is performed by determining whether the bit is a black bit, generating a drawing bit in response to an arbitrary conversion request, and developing a memory bitmap.

[0003]

However, the conversion processing in the conventional drawing apparatus has a disadvantage that the processing operation is complicated and that the drawing processing cannot be sped up. Further, with respect to the drawing result after conversion, it is not possible to perform a dot color priority process such as emphasizing a white dot or a black dot based on a user's request.

The present invention has been made to solve such a problem, and provides a drawing apparatus capable of simplifying a conversion process to increase the speed and also giving priority to a dot color for a drawing result. The purpose is to:

[0005]

SUMMARY OF THE INVENTION According to the present invention, a first screen in which the number of dots per unit length in the horizontal and vertical directions is A dots is displayed. The second number of dots consisting of B dots (however, A <B)
A drawing device that converts the image into a screen of
Sum of the horizontal run length m on the screen of
The number p of dots developed in the horizontal direction on the second screen and the
A horizontal conversion table for storing the sum q of the number of expansions p, and a horizontal continuous conversion table of the same color on the first screen.
For each dot, the number of dots n is added to the sum m,
This is stored in the horizontal conversion table as a new sum m.
After multiplying the sum m by the unit dot number B,
Dividing by the unit dot number A, the obtained quotient and the remainder are rounded off.
Quintuple value and add the dot development number
The value obtained by subtracting the sum q is newly defined as the dot development number p.
Stored in the horizontal direction conversion table,
The number of expansions p is the total number stored in the horizontal direction conversion table.
The sum is added to the sum q, and this is newly added to the sum q.
A first calculating means to be stored in a conversion table; a total sum M of the number of lines in the vertical direction on the first screen;
The number of vertical line developments P on the screen and the line
And vertical conversion table that stores the sum Q of the opening number P, before
For each vertical line on the first screen, 1 is added to the total
The sum is added to the sum M to obtain a new sum M.
Stored in a conversion table, and the sum M is the number of unit dots.
B and then dividing by the unit dot number A to obtain
Quotient and the rounded value of the remainder
The value obtained by subtracting the total Q of the dot development numbers is
Stored in the vertical conversion table as the number of in-expansion P,
Further, the line development number P is stored in the vertical conversion table.
The sum is added to the stored sum Q, and this is newly added to the sum Q.
The second operator stored in the vertical conversion table as
Comprises a stage, wherein the transverse direction of the second screen is drawn for each of the number of dots expand p, vertically Oite to the drawing device to draw on each number of said line deployment P, the transverse direction conversion table,
Priority color designation for designating a priority color to be emphasized on the second screen
The data is stored, and the first arithmetic unit draws a priority color.
If so, add the quotient and the remainder rounded value,
It is obtained by subtracting the sum q of the dot development numbers from the added value.
Is used as the dot development number p to draw a non-priority color.
In this case, subtract the sum q of the dot development numbers from the quotient
Is set as the dot development number p .

[0006]

[0007]

According to the present invention, since the vertical and horizontal conversions are performed using the horizontal and vertical conversion tables, the conversion processing can be simplified and speeded up.

Further, according to the present invention, by using the priority color designation data stored in the horizontal direction conversion table, it is possible to draw the drawing result with the priority color emphasized. In this case, a desired drawing result is obtained by adding the rounded value of the remainder to the dot development number p of the priority color and cutting off the remainder of the dot development number p of the non-priority color.

[0010]

FIG. 1 is a block diagram showing an embodiment of a drawing apparatus according to the present invention. This device is a CP
The entire system is controlled by a U (central processing unit) 1, and the following devices are connected to the CPU 1 via a system bus.

The ICC 2 is an IC (integrated circuit) card mounting slot and an IC memory card. IPLROM3
Is a read-only memory for storing an IPL (initial program loading) program and a maintenance program.
It has a storage capacity of 56 Kbytes. The font ROM 4 is a read-only memory for storing character fonts, and has a storage capacity of 8 Mbytes.

REC 5 is an LSI (Large Scale Integrated Circuit) for rotating pixel data, which internally rotates the pixel data (source) written in the SRAM 6 by 90 degrees at 0, 90, 180 and 270 degrees. The obtained pixel data (destination) is written to the SRAM 6.

An SRAM 6 is a static read / write memory for pixel data rotated by the REC 5,
It has a storage capacity of K bytes. This memory area is used for the source and destination of the rotation operation of the REC 5.

TRC7 is a timer, LTM8 is a host system high-speed serial interface control, and LR
TM9 is a host high-speed serial interface transceiver, and ODC10 is an LTM8 86-system bus and CPU.
1 bus conversion and DMA transfer.

The MAC 11 controls PIO (process input / output) access from the CPU 1. The MIC 12 is a monolithic integrated circuit, in which the TIMER 12a is a 16-bit timer having three channels and one common to three channels.
It has a 6-bit length prescaler. Also, INTCT
L12b gives priority control to the interrupt from each interrupt request source and sets the interrupt request from level 1 to level 7 as CP.
Issue to U1. The priority of the interrupt increases according to the ascending order of the interrupt number. In particular, at level 7, a non-maskable interrupt is generated. The SPIF 12c is an interface between the SP 13 and the CPU 1, and has a 16-bit command port, a status port, and a control port.

SP13 is a slave processor, PPR
14 and controls the state of the communication function panel with the PPR 14. The SPROM 15 is a read-only memory for storing SP programs and has a storage capacity of 32 Kbytes.

The CPLD 16 is a part of the IO register of the CPU 1 and is a dip switch. A PMC 17 is a plug-in memory card, and a PPRC 17a in the PMC 17 is a PPR control unit that transfers bit map data from the DRAM 18 to the DMA.
(Direct memory access) and outputs a serial signal required by the PPR 14. PC17b is DRAM
This is a parity checker at the time of reading.

The DRAM 18 is a dynamic read / write memory for temporarily storing data when the CPU 1 operates, and has a storage capacity of 18 Mbytes. This DRAM
Reference numeral 18 is used when rendering is performed.

This drawing apparatus has, for example, 24
Bitmap expansion (character code data, graphic command data) of drawing data of 0 dpi (dot / inch) to a memory is performed, and then conversion to, for example, 400 dpi is performed. In the case of image data, 240 → 400 dpi conversion drawing is performed at the same time as bitmap development to memory, and a 400 dpi drawing result of image data (character code data, figure command data, image data) is output. .

FIG. 2 shows a 32-bit (4-byte) horizontal conversion table T used for horizontal conversion of a screen.
A. In the table, the total sum of run lengths (m) indicates the total number of continuous pixels (run length) until the black dot or white dot changes, and the number of individual white bits or black bits sent from the source pattern. Are sequentially added and stored.

The number of dots developed (p) accumulates the number of bits to be drawn when the number of dots in the horizontal direction of the screen is converted from 240 dpi to 400 dpi, and the enlarged dest pattern after the arithmetic processing of each source pattern is accumulated. The number of white bits or the number of black bits is stored and stored. This value is used in the subsequent two-line or one-line writing, and a dest pattern is created.

The total sum (q) of the dot development numbers is 400 dpi.
The number of dots in the horizontal direction at the time of development is accumulated, and the value obtained by sequentially adding p is stored.

The priority color designation (clr) is referred to when a white bit, a black bit and normal drawing are selected, and the designated priority color is reflected in the drawing result. This priority color designation (cl
r) stores an instruction on data from the host device or a value of designation of priority color from memory switch information of this drawing device.

FIG. 3 shows a vertical conversion table T of 32 bits (4 bytes) used when the screen is converted in the vertical direction.
B. In the table, the sum (M) of lines stores and stores a value obtained by sequentially adding (incrementing by one line) the number of processed lines on the source pattern side.

The line development number (P) indicates whether the next line to be drawn is one line or two lines, and this value is stored and stored. This value is used for a two-line or one-line drawing instruction during the horizontal drawing process.

The sum (Q) of the line development numbers stores and stores a value obtained by sequentially adding the line development number (P).

Next, referring to the flowcharts shown in FIGS. 4 to 6, the number of dots in the horizontal direction of the screen is set to 240 dpi.
The operation of converting the data to 400 dpi will be described. First, the priority color designation (c
1r) is read (step S1). Next, it is determined whether the read priority color designation (clr) is white bit priority processing (step S2).

In the case of the white bit priority processing, the run length (n) is read (step S3), and it is determined whether it is a white bit or a black bit (step S4). If it is a white bit, the total sum of run lengths (m), the number of dot developments (p), and the total number of dot developments (q) are as follows (step S5).

M ← m + n p ← (quotient of m × 400/240) + (m × 400/24
(Rounded-off value of 0) −q q ← q + p This value is written in the horizontal direction conversion table TA.

Next, it is determined whether or not a two-line drawing instruction is given (step S6).
Two lines of p bits are written from the offset position of dr (step S7), and if it is not a 2-line drawing instruction, one line of p bits is written from the offset position of dest adr (step S8), and the process returns.

If the run length (n) is a black bit in step S4, the total sum of run lengths (m), the number of dot developments (p), and the total number of dot developments (q) are as follows (step S4). S9).

M ← m + n p ← (quotient of m × 400/240) −q q ← q + p This value is written in the horizontal conversion table TA.

Next, it is determined whether or not a two-line drawing instruction has been issued (step S10). If it is a two-line drawing instruction, two bits of p bits are written from the offset position of dest adr (step S11). One line of p bits is written from the offset position of adr (step S12), and the process returns.

If it is determined in step S2 that the priority color designation (clr) is not the white bit priority process, the process proceeds to FIG. 5, and it is determined whether the priority color designation (clr) is the black bit priority process (step S2). Step S21). In the case of black bit priority processing, run length (n) is read (step S2).
2) It is determined whether it is a white bit or a black bit (step S23). If it is a black bit, the total sum of run lengths (m), the number of dot developments (p), and the total number of dot developments (q) are as follows (step S24).

M ← m + n p ← (quotient of m × 400/240) + (m × 400/24
(Rounded-off value of 0) −q q ← q + p This value is written in the horizontal direction conversion table TA.

Next, it is determined whether or not a two-line drawing instruction has been issued (step S25). If the instruction is a two-line drawing instruction, two lines of p bits are written from the offset position of dest adr (step S26). Write one line of p bits from the offset position of adr (step S27), and return.

If the run length (n) is a white bit (step S23), the total sum of run lengths (m), the number of dot developments (p), and the total number of dot developments (q) are as follows ( Step S28).

M ← m + n p ← (quotient of m × 400/240) −q q ← q + p This value is written in the horizontal direction conversion table TA.

Next, it is determined whether or not a two-line drawing instruction is given (step S29). If the instruction is a two-line drawing instruction, two lines of p bits are written from the offset position of the dest adr (step S30). Write one line of p bits from the offset position of adr (step S31), and return.

If it is determined in step S21 that the priority color designation (clr) is not the black bit priority processing, the processing shifts to the processing in FIG. 6, and normal processing without emphasizing the bit color is performed. The total (m) of the run lengths, the actual number of developed dots (p), and the total (q) of the numbers of developed dots are as follows (step S41).

M ← m + n p ← (quotient of m × 400/240) + (m × 400/24
(Rounded-off value of 0) −q q ← q + p This value is written in the horizontal direction conversion table TA.

Next, it is determined whether or not a two-line drawing instruction has been issued (step S42). If it is a two-line drawing instruction, two bits of p bits are written from the offset position of the dest adr (step S43). Write one line of p bits from the offset position of adr (step S44), and return.

Here, the dest adr indicates an address arbitrarily specified in a memory for drawing a dest pattern. The offset position designates the position of a bit at the time of drawing the dest pattern. The range specified by the offset position is from 0 to 7 for a byte boundary (8 bits), from 0 to 15 for a word boundary (16 bits), and a long word boundary (32 bits).
In the case of, it is from 0 to 31.

Next, referring to the flow chart shown in FIG. 7, the number of dots in the vertical direction of the screen is changed from 240 dpi to 4 dots.
The operation for performing the enlargement conversion process to 00 dpi will be described.
First, the line (N) is read. Line (N) is 240
This is a virtual processed line that will be drawn at the time of dpi drawing. When the line (N) is input, the total sum (M) of the lines, the number of line developments (P), and the total sum of the number of line developments (Q) are as follows (step S5).
1).

M ← M + N P ← (quotient of M × 400/240) + (M × 400/24
(Rounded-off value of 0) −Q Q ← Q + P This value is written in the vertical direction conversion table TB.

Next, it is determined whether or not the number of line developments (P) is 2 (step S52).
A line drawing instruction is issued (step S53). If it is not 2, a 1-line drawing instruction is given at the time of horizontal drawing (step S54), and the line (N) is updated to update the number of lines.
Is added to (step S55), and the process returns.

As described above, when the white bit priority processing (steps S3 to S12) is performed, the “400 × 240 remainder rounded value” is changed to the white bit, reflecting the result of the priority color designation in the table TA. , And rounding off the remainder in the processing of the black bit makes it possible to obtain a drawing result in which the white bit is prioritized.

Further, black bit priority processing (step S22)
-S31), the result of the priority color designation in the table TA is reflected, "400 × 240 rounded value" is added to the number of black bits, and the white bit processing rounds off the remainder. By performing the processing, it is possible to obtain a drawing result with black bit priority.

The normal processing (steps S41 to S4)
If 4) is performed, the result of the priority color designation in the table is reflected, and “400 × 240 rounded value” is added to the numbers for both the white bit and the black bit to obtain the normal drawing result without emphasis. Can be obtained.

Next, with reference to the conversion schematic diagrams shown in FIGS.
A specific example in which the conversion processing is performed to the data from 400 dpi will be described. 8 shows a white bit priority process, FIG. 9 shows a black bit priority process, and FIG. 10 shows a normal process. In each figure, (a) shows a 240 dpi source pattern, and (b) shows a 400 dpi dest pattern. Also,
It is assumed that the arrangement of the white dots and the black dots is the same in the source pattern of each drawing. The origin coordinates (0, 0) of the screen are at the upper left position, and the coordinates (x, y) of the drawing start position on the 240 dpi screen are (3, 3).

First, a specific example of the white bit priority processing (steps S3 to S12) will be described with reference to the conversion diagram shown in FIG.

As processing 1, conversion processing of the drawing start position is performed. The coordinates (X, Y) of the drawing start position after the conversion are as follows.

X coordinate: 3 × 400/240 = 5 Y coordinate: 3 × 400/240 = 5 Accordingly, the coordinates (X, Y) of the drawing start position after conversion are (5, 5). .

As processing 2, conversion processing for the first line in the vertical direction is performed. From step S51, the sum of the lines (M), the number of line developments (P), and the sum of the number of line developments (Q) are as follows. The numerical values in square brackets [] are calculated values.

M [1] ← M [0] + N [1] P [2] ← quotient [1] + Rounded value [1] −Q [0] Q [2] ← Q [0] + P [2] Accordingly, since P (the number of line developments) is 2, two-line drawing is performed.

In process 3, a horizontal dot conversion process for the first line is performed. First, with respect to the white dots of two run lengths on the left side of the first line, the total sum (m) of the run lengths, the number of dot developments (p), and the total sum (q) of the dot development numbers from step S5 are as follows.

M [2] ← m [0] + n [2] p [3] ← quotient [3] + rounded value [0] −q [0] q [3] ← q [0] + p [3] Accordingly, since p (the number of developed dots) is 3, the white dot is converted and drawn from 2 run lengths to 3 run lengths.

Next, in step S9, the total of the run lengths (m), the number of dot developments (p), and the total of the dot development numbers (q) from the step S9 are as follows. Become.

M [4] ← m [2] + n [2] p [3] ← quotient [6] −q [3] q [6] ← q [3] + p [3] Therefore, p (dot development number ) Is 3, so that the black dot is converted and drawn from 2 run lengths to 3 run lengths.

Next, the total of the run lengths (m), the number of dot developments (p), and the total of the dot development numbers (q) from the step S5 are as follows. Become.

M [6] ← m [4] + n [2] p [4] ← quotient [10] + rounded value [0] −q [6] q [10] ← q [6] + p [4] Accordingly, since p (the number of developed dots) is 4, the white dot is converted and drawn from 2-run length to 4-run length.

Further, P (the number of line developments) obtained in process 2
Is 2, the first line is divided into steps S7 and S1.
Two lines are drawn by one.

As processing 4, conversion processing for the second line in the vertical direction is performed. From step S51, the sum of the lines (M), the number of line developments (P), and the sum of the number of line developments (Q) are as follows.

M [2] ← M [1] + N [1] P [1] ← quotient [3] + Rounded value [0] −Q [2] Q [3] ← Q [2] + P [1] Accordingly, since P (the number of line developments) is 1, one line is drawn.

In process 5, a horizontal dot conversion process for the second line is performed. First, for the two run length black dots on the left side of the second line, the total sum of run lengths (m), the number of dot developments (p), and the total sum of the number of dot developments (q) from step S9 are as follows.

M [2] ← m [0] + n [2] p [3] ← quotient [3] −q [0] q [3] ← q [9] + p [3] Therefore, p (dot development number ) Is 3, so that the black dot is converted and drawn from 2 run lengths to 3 run lengths.

Next, in step S5, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S5 are as follows. Become.

M [4] ← m [2] + n [2] p [4] ← quotient [6] + rounded value [1] −q [3] q [7] ← q [3] + p [4] Accordingly, since p (the number of developed dots) is 4, the white dot is converted and drawn from 2-run length to 4-run length.

Next, the total of the run lengths (m), the number of dot developments (p), and the total of the dot development numbers (q) from the step S9 are as follows. Become.

M [6] ← m [4] + n [2] p [3] ← quotient [10] −q [7] q [10] ← q [7] + p [3] Therefore, p (dot development number ) Is 3, so that the black dot is converted and drawn from 2 run lengths to 3 run lengths. Further, since P (the number of line developments) obtained in process 4 is 1, one line is drawn for the second line in steps S8 and S12.

Next, a specific example of the black bit priority processing (steps S22 to S31) will be described with reference to the conversion diagram shown in FIG.

As processing 1, conversion processing of the drawing start position is performed. This processing is the same as the processing 1 in FIG. As a result of this processing 1, the coordinates (X, Y) of the drawing start position after conversion are (5, 5).

Next, as processing 2, conversion processing for the first line in the vertical direction is performed. This process is also the same as the process 2 in FIG. As a result of this processing 2, P (the number of line developments) becomes 2, so that two lines are drawn.

As process 3, a horizontal dot conversion process for the first line is performed. First, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S28 in the left two-run-length white dots on the first line are as follows.

M [2] ← m [0] + n [2] p [3] ← quotient [3] −q [0] q [3] ← q [0] + p [3] Therefore, p (dot development number ) Is 3, so that the white dot is converted and rendered from 2 run lengths to 3 run lengths.

Next, in step S24, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S24 are as follows. Become.

M [4] ← m [2] + n [2] p [4] ← quotient [6] + rounded value [1] −q [3] q [7] ← q [3] + p [4] Accordingly, since p (the number of developed dots) is 4, the black dot is converted and drawn from 2 run lengths to 4 run lengths.

Next, the total of the run lengths (m), the number of dot developments (p), and the total of the dot development numbers (q) from the step S28 for the two run-length white dots on the right side of the first line are as follows. Become.

M [6] ← m [4] + n [2] p [3] ← quotient [10] −q [7] q [10] ← q [7] + p [3] Therefore, p (dot development number ) Is 3, so that the white dot is converted and rendered from 2 run lengths to 3 run lengths.

Further, P (the number of line developments) obtained in process 2
Is 2, the first line is divided into steps S26 and S
30, two lines are drawn.

As processing 4, conversion processing for the second line in the vertical direction is performed. This processing is also the same as the processing 4 in FIG. As a result of this processing 4, P (the number of line developments) becomes 1, so that one line is drawn.

In process 5, a horizontal dot conversion process for the second line is performed. First, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S24 for the left two-run length black dot on the second line are as follows.

M [2] ← m [0] + n [2] p [3] ← quotient [3] + rounded value [0] −q [0] q [3] ← q [0] + p [3] Accordingly, since p (the number of developed dots) is 3, the black dot is converted from two run lengths to three run lengths.

Next, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S28 are as follows. Become.

M [4] ← m [2] + n [2] p [3] ← quotient [6] −q [3] q [6] ← q [3] + p [3] Therefore, p (dot development number ) Is 3, so that the white dot is converted and rendered from 2 run lengths to 3 run lengths.

Next, the total of the run lengths (m), the number of dot developments (p), and the total of the dot development numbers (q) from the step S24 are as follows. Become.

M [6] ← m [4] + n [2] p [4] ← quotient [10] + rounded value [0] −q [6] q [10] ← q [6] + p [4] Accordingly, since p (the number of developed dots) is 4, the black dot is converted and drawn from 2 run lengths to 4 run lengths. Further, since P (the number of line developments) obtained in process 4 is 1, one line is drawn for the second line in steps S27 and S31.

Next, a specific example of the normal processing without emphasis (steps S41 to S44) will be described with reference to the conversion schematic diagram shown in FIG.

As processing 1, conversion processing of the drawing start position is performed. This processing is the same as the processing 1 in FIG. As a result of this processing 1, the coordinates (X, Y) of the drawing start position after conversion are (5, 5). As processing 2, conversion processing of the first line in the vertical direction is performed. This process is also the same as the process 2 in FIG. As a result of this processing 2, P (the number of line developments) is 2
Therefore, two-line drawing is performed.

As processing 3, a horizontal dot conversion processing for the first line is performed. First, the total of the run lengths (m), the number of dot developments (p), and the total of the dot development numbers (q) for the two run-length white dots on the left side of the first line from step S41 are as follows.

M [2] ← m [0] + n [2] p [3] ← quotient [3] + rounded value [0] −q [0] q [3] ← q [0] + p [3] Accordingly, since p (the number of developed dots) is 3, the white dot is converted and drawn from 2 run lengths to 3 run lengths.

Next, in step S41, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S41 are as follows. Become.

M [4] ← m [2] + n [2] p [4] ← quotient [6] + rounded value [1] −q [3] q [7] ← q [3] + p [4] Accordingly, since p (the number of developed dots) is 4, the black dot is converted and drawn from 2 run lengths to 4 run lengths.

Next, from step S41, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S41 are as follows. Become.

M [6] ← m [4] + n [2] p [3] ← quotient [10] + rounded value [0] −q [7] q [10] ← q [7] + p [3] Accordingly, since p (the number of developed dots) is 3, the white dot is converted and drawn from 2 run lengths to 3 run lengths.

Further, P (the number of line developments) obtained in process 2
Is 2, the first line is drawn in step S43.

As processing 4, conversion processing for the second line in the vertical direction is performed. This process is also the same as the process 4 in the process of FIG. As a result of this processing 4,
Since P (the number of developed lines) is 1, one line is drawn.

As processing 5, horizontal dot conversion processing for the second line is performed. First, the total (m) of the run lengths, the number of dot developments (p), and the total of the number of dot developments (q) for the two run-length black dots on the left side of the second line from step S41 are as follows.

M [2] ← m [0] + n [2] p [3] ← quotient [3] + rounded value [0] −q [0] q [3] ← q [0] + p [3] Accordingly, since p (the number of developed dots) is 3, the black dot is converted from two run lengths to three run lengths.

Next, in step S41, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S41 are as follows. Become.

M [4] ← m [2] + n [2] p [4] ← quotient [6] + rounded value [1] −q [3] q [7] ← q [3] + p [4] Accordingly, since p (the number of developed dots) is 4, the white dot is converted and drawn from 2-run length to 4-run length.

Next, the total of the run lengths (m), the number of dot developments (p), and the total of the number of dot developments (q) from the step S41 are as follows. Become.

M [6] ← m [4] + n [2] p [3] ← quotient [10] + rounded value [0] −q [7] q [10] ← q [7] + p [3] Accordingly, since p (the number of developed dots) is 3, the black dot is converted from two run lengths to three run lengths. Further, since P (the number of line developments) obtained in process 4 is 1, one line is drawn for the second line in step S44.

[0104]

According to the present invention, since the vertical and horizontal conversions are performed using the horizontal and vertical conversion tables, the conversion processing can be simplified and speeded up. .

Further, according to the present invention, according to the user's wishes, such as emphasizing white bits or black bits with respect to the converted drawing result or outputting a normal drawing result in accordance with an instruction from a host device or memory switch information. The drawing result can be output, and the output of the drawing result can be selected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a drawing apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a horizontal direction conversion table.

FIG. 3 is a diagram showing a vertical direction conversion table.

FIG. 4 is a flowchart showing a horizontal direction conversion process.

FIG. 5 is a flowchart showing a horizontal conversion process following FIG. 4;
It is.

FIG. 6 is a flowchart showing a horizontal conversion process following FIG. 5;
It is.

FIG. 7 is a flowchart showing a vertical direction conversion process.

FIG. 8 is a conversion diagram showing a specific example of white bit priority processing;
(A) shows a source pattern, and (b) shows a dest pattern.

FIG. 9 is a conversion diagram showing a specific example of black bit priority processing;
(A) shows a source pattern, and (b) shows a dest pattern.

FIG. 10 is a conversion schematic diagram showing a specific example of the normal processing, and FIG.
Indicates a source pattern, and (b) indicates a dest pattern.

[Explanation of symbols]

Reference Signs List 1 CPU (central processing unit) 2 ICC (IC memory card) 3 IPLROM (IPL program memory) 4 FONTROM (character font memory) 5 REC (LSI for pixel data rotation) 6 SRAM (static memory for pixel data) 7 TRC (timer) 8) LTM (host high-speed serial interface control) 9 LRTM (host high-speed serial interface transceiver) 10 ODC (bus conversion and DMA transfer control) 11 MAC (PIO access control) 12 MIC (monolithic integrated circuit) 13 SP (slave) Processor) 14 PPR 15 PSROM (SP program memory) 16 CPLD (Dip switch) 17 PMC (Plug-in memory card) 18 DRAM (Dynamic memory) TA Horizontal direction Conversion table TB Vertical conversion table

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-114567 (JP, A) JP-A-1-1833961 (JP, A) JP-A-2-210957 (JP, A) JP-A-5-114 250468 (JP, A) JP-A-7-114635 (JP, A) JP-B-60-25945 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) G06T 3/40 H04N 1 / 393 H04N 1/387 101 JICST file (JOIS)

Claims (1)

(57) [Claims] 1. A first screen in which the number of dots per unit length in the horizontal direction and the vertical direction is A dots, and the number of dots per unit length in the horizontal direction and the vertical direction is B dots (however, A <B), which is a drawing device that converts and draws on a second screen composed of A <B), wherein a total sum m of horizontal run lengths on the first screen is m
And the dot development number p in the horizontal direction on the second screen
And a horizontal direction conversion table for storing the total q of the dot development numbers p, and dots of the same color that are continuous in the horizontal direction on the first screen.
For each point, the dot number n is added to the sum m, and
Is stored in the horizontal conversion table as a new sum m.
After multiplying the sum m by the unit dot number B,
Divide by the unit dot number A and round the obtained quotient and remainder
And the sum of the dot development numbers from the sum.
The value obtained by subtracting the sum q is newly defined as the dot development number p.
Stored in the horizontal direction conversion table, and
The opening number p is the sum total stored in the horizontal conversion table.
q, and this is added as a new sum q,
First calculation means to be stored in the conversion table, a sum M of the number of lines in the vertical direction on the first screen ,
The number of line developments P in the vertical direction on the second screen
A vertical conversion table for storing the sum Q of the line development numbers P , and 1 for each vertical line on the first screen.
The sum is added to the sum M and the sum is defined as a new sum M.
And stores the sum M in the unit dot.
After multiplying by the number B and dividing by the unit dot number A,
Quotient and the rounded value of the remainder
The value obtained by subtracting the total Q of the dot development numbers is newly calculated.
Stored in the vertical conversion table as the line development number P
Further, the line development number P is converted into the vertical direction conversion table.
Is added to the total sum Q stored in the
The second performance stored in the vertical conversion table as the sum Q
Comprising a calculation means, wherein the lateral direction of the second screen is drawn for each of the number of dots expand p, vertically Oite to the drawing device <br/> to draw on each of the line number deployment P, the transverse The direction conversion table is highlighted on the second screen.
Priority color designation data for designating a priority color is stored, and the first arithmetic means stores the quotient when drawing the priority color.
And the rounded value of the remainder, and
The value obtained by subtracting the sum q of the dot development numbers is
When the number of expansions is p and the non-priority color is drawn,
The value obtained by subtracting the sum q of the dot development numbers is
A drawing apparatus characterized in that the number of development is p .