KR900004949B1 - Output controller of interpolation dot pattern - Google Patents

Abstract

A dot interpolation control system for dot-interpolating a character pattern in a predetermined dot matrix form expressed by x and y coordinates at an y designated angle along at least the main scanning or subscanning direction so as to obtain a modified character pattern which is rotated or inclined, comprises a means for calculating an area of a rectangle along the x and y lines which circumscribe a frame of the character pattern converted at the designated angle, and a means for controlling the character interval in units of the rectangular areas.

Description

Output control device of interpolation dot pattern

1A to 1C are diagrams for explaining conventional dot interpolation processing means, respectively.

2 is a block diagram showing the configuration of main parts in an embodiment of the present invention.

3 to 11 illustrate the operation of the embodiment, respectively.

3A to 3F show the relationship between the dot information (dot pattern) of one grid and four points surrounding each new dot generated by the dot interpolation process, the level classification of the interpolation value set in the interpolation table ROM, and the table form. Figure.

4 is a diagram for explaining a selection switching operation in the form of a table.

5A to 5B show examples of pattern conversion, respectively.

6A and 6B are diagrams showing the main and sub scanning directions in contrast to the main and sub scanning directions when printed out and displayed in the CRT display.

Fig. 7 shows the relationship between the various setting data in Fig. 7;

8 is a diagram showing a relationship between a character pattern-converted by dot interpolation processing and a rectangle circumscribed to the character.

9 is a diagram showing an example of setting the character pitch and the row pitch for various modified characters.

FIG. 10 is a diagram showing an example of development of an underline for various deformed characters. FIG.

11 is a view for explaining zone dividing means.

* Explanation of symbols for main parts of the drawings

10: CPU 11: Main Memory (MM)

12: CPU bus 13: display control circuit (CRT-C °)

14 frame memory (FM) 15 parallel-to-serial conversion circuit (PS)

16: CRT display unit 17: print control unit

18: line buffer 19: serial dot printer

21,22,25,26,27,28,31,32,33,34,35,36,42,44,46,48,50,54,56: register

23: underline / radiation control unit 24: triangular function table

29: offset data generation unit

37,38,39,40: Addition circuit (ADD-A, ADD-B, ADD-C, ADD-D)

41, 43, 45, 47: Data selector 49: Selection control circuit (SC)

51 Kanji pattern memory (KPM) 52: 1 character buffer

53: bit select circuit 55: discrimination control circuit

57: dot discrimination circuit 58: interpolation table

59: comparator 60: shift register

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output control apparatus for an interpolation dot pattern used for a document producing apparatus and a character output apparatus for handling font information of a dot matrix structure.

In the apparatus which handles the character itself having a prescribed dot matrix structure, such as a document producing apparatus, in the conventional art, when giving a function capable of enlarging / reducing the character itself having a prescribed dot matrix structure at a certain magnification, FIGS. As shown in (b), the original character pattern dot SD... … The so-called simple zoom reduction method was used to simply increase or delete dots.

Such a conventional enlargement / reduction means can be realized relatively simply and inexpensively, but the pattern of the output pattern is distinguished from the original form of the character to be expressed, for example, the formation of the steps on the inclined line is prominent. There was a flaw in the unnatural character expression that was difficult to do. When the original character pattern in the conventional dot interpolation means as described above or a character pattern having an arbitrary magnification / reduction ratio is inclined or rotated at an arbitrary angle, it cannot be easily obtained. In addition, even if the deformation range is greatly limited, the converted character pattern is distorted, and the conversion accuracy is greatly reduced, and a pattern conversion with high fidelity cannot be performed.

In addition, for the above-described modified characters such as the rotation character and the oblique type character, the character width or the height of the interpolated character, or any one of them can always be defined as a dot structure in byte units. In this case, the scanning start position of the newly generated character pattern by dot interpolation does not coincide with the byte boundary on the memory side, and there is a defect in the handling of image data in character units. . In addition, since the image of the character after dot interpolation is fixedly developed on the position according to the scanning in the related art, for example, a ruby character (character smaller than the original character) that is printed out is to be moved in the vertical direction of the doot. There was a flaw that could not do it when desired.

The present invention has been studied in consideration of the above-described setting, and the writing start position of the character pattern dots generated by dot interpolation when the original character itself has high precision dot interpolation and is transformed according to arbitrary enlargement and reduction magnification, angle, etc. Output of an interpolation dot pattern that facilitates handling of image data in units of deformed characters by allowing correspondence with memory boundaries of the image memory at all times, and that arbitrary characters can be moved within the write width of the image memory. It is an object to provide a control device.

The present invention provides interpolation dot information generated based on dot interpolation addresses in the main and scanning directions represented by the x and y components, and dot interpolation addresses in the sub and scan directions represented by the x and y components. The bit length corresponding to the write width of the image memory developed into the processed character pattern is stored in the shift register, and the bit corresponding to the write width of the image memory prior to the writing of interpolation dots for each note and scan for the shift register. A offset data generation means for selectively generating an offset value within a range and writing to the shift register so that a correspondence can be made between a write start position of a character pattern dot generated by dot interpolation and a write boundary of the image memory; By doing this, the original character itself has a high accuracy dot interpolation. Correspondence between the writing start position of the character pattern dot caused by dot interpolation and the memory boundary of the image memory when transformed according to the large, reduced magnification, angle, etc. can be easily handled and the image data for each modified character can be easily handled. In addition, since arbitrary characters can be moved within the range of the write width of the image memory, the output function of the dot interpolated character pattern can be expanded.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

2 is a circuit block diagram showing an embodiment of the present invention. In the figure, reference numeral 10 denotes a CPU which controls the entire system, reference numeral 11 denotes a main memory MM, and reference numeral 12 denotes a CPU bus. Reference numeral 13 denotes a display control circuit (CRT-C), reference numeral 14 denotes a frame memory FM, reference numeral 15 denotes a serial / parallel conversion circuit, reference numeral 16 denotes a CRT display, and reference numeral Reference numeral 17 denotes a printing control unit, reference numeral 18 denotes a line buffer, and reference numeral 19 denotes a serial dot printer. Reference numeral 21 denotes a register indicating the size (V size) corresponding to the width in the sub-scanning direction (interval / scan interval x number of times) after conversion in pattern conversion, and reference numeral 22 denotes the same note. This register indicates the size (H size) corresponding to the width of the scanning direction. Reference numeral 23 denotes an underline / radiation control unit which has a length in accordance with the contents of the register 21 and generates an underline and a ray dot pattern and writes it to the line buffer 18. Reference numeral 24 denotes a trigonometric function table for storing angular information (triangle function data) corresponding to the designated angle in the case of the oblique rotation of characters. Reference numeral 25 is an area designation register for dividing the area of the character pattern after the conversion process exceeding the reference character height in units of the reference character height during pattern conversion. Reference numerals 26 and 27 denote registers for storing dot notation widths (dx, dy) according to the magnification and reduction ratio of characters, and reference numeral 28 is optional in the range of 0 to 7 dots for pattern converted characters. Offset register for giving an offset, reference numeral 29 is an offset data generator for generating offset data ("0" representing non-display) with the number of dots in accordance with the offset value of the offset register 28. .

Reference numerals 31 to 49 each constitute a component for generating a dot interpolation address, and reference numeral 31 denotes a register for storing dot writing width DX1 in the sub-scanning direction including an x component. , Reference numeral 32 denotes a register for storing dot engraving width DX2 in the scanning and scanning direction including x components, and reference numeral 33 denotes an initial value of the scanning and scanning direction including x components (initial address: X1). init), the reference numeral 34 denotes a register for storing the dot-indentation width DY1 in the sub-scanning direction containing the y component, and the reference numeral 36 denotes a register for the main / scanning direction containing the y component. A register for storing dot indentation width DY2, and reference numeral 36 are registers for storing an initial value (initial address: Y1 init) in the sub-scanning direction including the y component. The dot interpolation addresses stored in the above registers 31 to 36 are each composed of data of the integer part and data of the fractional part.

Reference numeral 37 denotes an addition circuit ADD-A for adding the contents of the register 31 and the contents of the register 42 indicating the dot position in the sub-scanning direction including the x component, and the reference number ( 38 is an addition circuit ADD-B which adds the contents of the register 32 and the contents of the register 44 indicating the dot position in the scanning and scanning direction including the x component, and reference numeral 39 denotes the above. An addition circuit (ADD-C) for adding the contents of the register 46 indicating the dot position in the sub-scanning direction including the contents of the register 34 and the y component, and reference numeral 40 denotes the register 35. An addition circuit (ADD-D) that adds the contents of the register 48 indicating the dot position in the main and scanning directions including the contents of and the y component.

Reference numeral 41 selects the contents of the register 33 when starting the dot interpolation process for one character, and then selects the output of the addition circuit 37 each time one main / scan is executed. Denotes an integer part containing the x component selected by the data selector 41 and a register for storing a new dot address at the time of dot interpolation represented by the decimal part. A data selector which selects the contents of the register 42, and then selects the output of the addition Hi 38 for every one-dot interpolation process; reference numeral 44 contains the x component selected by the data selector 43; This register stores the new dot address for dot interpolation. Reference numeral 45 selects the contents of the register 36 at the start of the dot interpolation process for one character, and then selects the output of the addition circuit 39 each time a main scan or scan is executed. And reference numeral 46 denotes a register for storing a new dot address at the time of dot interpolation represented by an integer part and a fractional part including the y component selected by the data selector 45, and reference numeral 47 denotes when starting an order scan. Selects the contents of the register 46 and selects the output of the addition circuit 40 each time the interpolation process is performed for one dot, and reference numeral 48 denotes the y selected by the data selector 47. This register is used to store a new dot address for dot interpolation that contains a component. Reference numeral 49 denotes a selection control circuit SC for controlling the respective data selectors 41, 43, 45, 47.

Reference numeral 50 is a register for storing a comparison value for performing comparison with an interpolation value described later, that is, a threshold value th.

Reference numeral 51 denotes a Chinese character pattern memory KPM in which character pattern data of a predetermined dot matrix unit (16 x 16 dots) containing Chinese characters is stored. Reference numeral 52 is a one-character buffer constructed by a high speed RAM that stores a dot pattern for one character read from the Chinese character pattern memory 51. Here, the dot pattern for one character is stored in the state filled with the bit pattern of the dot " 0 ". Reference numeral 53 selectively outputs dot information of four grids of one grid surrounding new dots according to the values of the respective integer portions of the registers 44 and 48 of the character pattern data stored in the one-character buffer 52. Bit selection circuit. Reference numeral 54 is a register that stores four bits of information output from the bit select circuit 53.

Reference numerals 55 to 57 recognize a pattern of dot information output from the bit select circuit 53, and a dot pattern recognition unit (DSP) for selectively switching and controlling the interpolation value of a new dot surrounded by four dots. Reference numeral 55 recognizes the dot pattern state of four points in the bit contents of the register 54, and at the time of the specific dot pattern state described later, It is a discrimination control circuit that controls the bit selection circuit 53 to sequentially select dot information. Reference numeral 56 is a register that stores 4-bit information read by the control of the discrimination control circuit 55. Reference numeral 57 denotes a dot for outputting a 1-bit interpolation value switching selection signal according to the dot pattern state between the two grid dot information read out under the control of the discrimination control circuit 55 and the dot information of the register 54. Discrimination circuit.

Reference numeral 58 denotes the value of the fractional part stored in the register 44 (the main / scan direction offset value including the 5-bit x component) and the dot information and the dot discrimination circuit 57 of the four points stored in the register 54. The interpolation table ROM outputs the interpolation value Qxy of a new dot in an area surrounded by the four points of dot information by using the 1-bit interpolation value switching selection signal output from the input information. Here, a mask ROM of 256K bits (32K x 8 bits) is used to output an 8-bit (0-255 level) interpolation value according to a 15-bit read address.

Reference numeral 59 is a comparator for comparing the interpolation value output from interpolation table ROM 58 with the threshold stored in register 50, and the dot (brightness point) on when the interpolation value exceeds the comparison value, that is, the threshold value. Outputs a signal of "1" level indicating.

Reference numeral 60 sequentially stores the dot information output from the comparator 59, and outputs it to the CPU bus 12 for each write bit unit (here, 8 bit units) of the memory in which the character pattern is developed. to be.

3 to 11 are diagrams for explaining the operation of the above embodiment, respectively.

3A to 3F show dot information (dot pattern) of one grid and four points surrounding each new dot generated by interpolation processing, the level classification of the interpolation value set in the interpolation table ROM 58, the table form and It is a figure which shows the relationship of. Here, the interpolation value is expressed by the luminance (contrast level) of 0 to 255 steps, and a part of the divided area is shown by the contour line.

4 is a view for explaining a table-type selection switching example when only one dot of one dot pattern of four grids is on ("1") or off ("0"), and the dot pattern recognition unit (DSP) For example, when only one of the above four dots D0, D1, D2, and D3 is off, that is, "0" (D0 denoted by a white circle in the drawing), and the dot (Da) of the surrounding grid is specified. Recognizes the on / off state of Db) and selects the co-owner type table T1 as shown in FIG. 3d when Da, Db = "0 ", and at least one of Da, Db is " 0 ", the inclined table T0 as shown in FIG. 3f is selected. In this way, the interpolation value of the new dot located in the dot region of four points is determined by the dot state around the dots when the four dots form the above-described specific pattern.

5A to 5B show various pattern conversion examples, in which Sm represents the main and scanning directions, Ss represents the sub and scanning directions, respectively, and FIG. Plane), drawing (b) shows an inclined body, drawing (c) shows a lower trimmed inclined body, and drawing (d) shows a rotating body, respectively.

6A and 6B are diagrams for explaining the relationship between the output object of the dot interpolation process, that is, the image output object and the main / scan direction Sm and the sub-scan direction Ss at the time of dot interpolation. (A) shows the directions of main, scanning and sub scanning at the time of dot interpolation at the time of CRT display, and (b) shows the main, scanning and sub scanning at the time of dot interpolation at the time of printing out. Each direction is shown. In this way, in the dot interpolation process at the time of CRT display output and the dot interpolation process at the time of printout, the main scanning direction and the sub scanning direction are inverted.

7 is a diagram showing a correspondence relationship between various types of setting data.

FIG. 8 is a diagram showing a relationship between a character pattern-transformed by dot interpolation processing and a rectangle (including a square) circumscribed to the character.

9 is a diagram showing an example of setting of the character pitch CP and the row pitch LP for various modified characters.

FIG. 10 is a diagram showing an example of development of underline for each type of deformed character.

11 is a diagram for explaining the zoning operation.

The operation of one embodiment of the present invention will now be described. At the time of dot interpolation, the CPU 10 performs initial setting of various registers in accordance with dot interpolation specification information input from the outside. That is, the CPU 10 sets the comparison value for comparison with the interpolation value generated in the interpolation table ROM 58, that is, the threshold value th in the register 50, and then sets the reference value according to the designated magnification. Calculate the dot indentation width (dx, dy: inverse of magnification / reduced magnification) and set it in the registers 26 and 27, and when it is rotated or inclined again, the trigonometric function data according to the designated angle ( sin, cos, tan) are set in the trigonometric function table 24.

Then, initial values (initial value addresses: X1 init, Y1 init) and dots for generating the dot interpolation address according to the setting data (sin, cos, tan) of these registers 26, 27 and the trigonometric function table 24. Indentation widths DX1, DY1, DX2, and DY2 are calculated, and their data are set in the registers 31 to 36, and at the same time, variations in character height and character width caused by pattern conversion such as enlargement and rotation are performed. The data of the V size and the H size is calculated and set in the registers 21 and 22, and when the zones are divided, the number of zones is calculated and this data is set in the register 25. Also, when the dot interpolated character is shifted within the range of 1 to 7 dots at the time of its output (for example, when printing out the interpolated ruby ruby character (small letter) and half-width character, etc., 1). The number of dots in the main / scanning direction of the pattern-converted character is not a multiple of the write width (8 dots) of the image memory to be outputted, and the bike on the image memory side When it is necessary to match the boundary (write width) or the like, an offset value is set in the offset register 28 within a range of 1 to 7 dots.

After finishing the initial setting of each register as described above, the CPU 10 starts the generation process of the boat interpolation address as follows.

First, the whole operation will be described taking the case where dot interpolation is performed with a stagnation (or a long body or a flat body) as shown in FIG. 5A as an output object (for example, simple enlargement / reduction). In this dot interpolation, the register 31 has a dot writing width "dx" in the "0" register 32, the initial value "sx" in the main / scanning direction sm in the register 33, and a dot in the register 34. FIG. The engraving width "dy", "0" in the register 35, and the initial value "sy" in the sub-scanning direction Ss are set in the register 36, respectively.

The dot notation widths dx and dy set in the registers 32 and 34 are given as inverse values of the enlargement / reduction ratio. In the register 33, Ix having [Ix = (dx-1) / 2] is given as an initial value Sx, and the register 36 has Iy having [Iy = (dy-1) / 2]. It is given by the initial value Sy. When dx or dy is less than or equal to "1" (that is, when enlarged), Ix or Iy becomes negative to display an address outside the original character pattern storage area of the one-character buffer 52, and dx or dy is " 1 'or more (i.e., at the time of reduction), Ix or Iy is positive to display the address in the original character pattern storage area of the one-character buffer 52. In addition, the register 50 is compared with the interpolation value output from the interpolation table ROM 58, and an arbitrary level (0-255 level) for determining which level or more of the new dot is a meaningful dot. The comparison value, i.e. threshold th, is set.

The CPU 10 reads the dot pattern data for one character to be interpolated from the Chinese character pattern memory 51 and writes the character pattern data into the one character buffer 52. At this time, the one-character buffer 52 stores the dot pattern data for one character to be the dot interpolation object as described above in a state where " 0 " which is meaningless is surrounded by dots.

After taking out the data to the registers 31 to 36 and the interpolation target character pattern to the one-character buffer 52, the data to be the initial address stored in the registers 33 and 36 under the control of the selection control circuit 49 ( Sx and Sy are selected by the data selectors 41 and 45 and stored in the corresponding registers 42 and 46, respectively. In addition, when starting scanning and scanning, the data Sx and Sy stored in the registers 42 and 46 are selected by the data selectors 43 and 47 and stored in the corresponding registers 44 and 48, respectively. .

The data Sx and Sy stored in these registers 44 and 48 are given the value of the integer part to the bit selection circuit 53, and the value of the fractional part is given to the interpolation table ROM 58.

The bit select circuit 53 selects the dot information of one grid and four points from the one-character buffer 52 according to the input value of the integer part, and supplies it to the interpolation table ROM 58. At this time, in magnification (dx, dy <1), since the bit selection circuit 53 is given a negative value indicating an address other than the original character pattern storage area of the one-character buffer 52, the original character pattern storage area Dot selection is started from dot information of one grid and four points including other dots. At the time of reduction (dx, dy> 1), since the bit selection circuit 53 is given a positive value indicating an address in the original character pattern storage area of the one-character buffer 52, the original character pattern storage area Dot selection is started from dot information of four points in one grid.

The interpolation table ROM 58 stores each offset (10 bits in total) from the registers 44 and 48, dot information of four points of surroundings from the bit selection circuit 53, and the dot pattern recognition unit DSP. The 1-bit interpolation value switching selection signal is used as input information, and an 8-bit interpolation value Qxy corresponding to the content is output. At this time, when the dot pattern of one grid and four points output from the bit selection circuit 53 is recognized by the dot pattern recognition unit DSP and is a specific dot pattern as shown in FIG. Recognizes the on / off state and outputs a 1-bit interpolation value switching selection signal corresponding to the dot state. That is, for example, as shown in FIG. 4, when only one point of the four surrounding dots D0, D1, D2, and D3 is off, that is, "0" (D0 indicated by white circles in the drawing), Recognizes the on / off state of the specific dots Da and Db of the lattice, and if Da, Db = " 1 ", selects the co-owner type table T1 as shown in FIG. 3d, and at least Da, Db If either is "0", the interpolation value switching selection signal is output so as to select the inclined table T0 as shown in FIG. 3F. In addition, when only one point among four surrounding dots D0, D1, D2, and D3 is on, that is, "1" (D0 shown as a circle drawn with a white circle in the drawing), a specific dot of the surrounding grid is again. Recognizing the on / off state of (Da, Db), and Da, Db = " 0 " selects a co-owner type table T1 as shown in FIG. 3a, and at least one of Da, Db is " 1 ", an interpolation value switching selection signal for selecting the inclined table T0 as shown in FIG. 3E is output. In this way, the interpolation value of the new dot located in the dot area of four points is determined by the dot state around it again when the four dots form a specific pattern as described above. The interpolation value of 8 bits (0 to 255 level) output from the interpolation table ROM 58 is input to the comparator 59, meaning that the interpolation value compared to the threshold stored in the register 36 exceeds the threshold. A signal of level "1" indicating that the dot is present is output, and a signal of level "0" indicating that the dot is meaningless if the interpolation value does not exceed the threshold.

On the other hand, after the interpolation value of one dot is output from the interpolation table ROM 58, the contents of the register 44 and the contents of the register 32 are added by the addition circuit 38, and at the same time, the contents of the register 48 and the register. The contents of (35) are added by the addition circuit 40, and the data of each addition result is selected by the corresponding data selectors 43 and 47 under the control of the selection control circuit 49, and the registers 44 and 48 ) At this time, among the registers 32 and 35 showing the dot engraving widths in the main and scanning directions, the dot writing width dx corresponding to the designated magnification / reduction ratio is set in the register 32, and the register 35 has a stagnation ( Or "0" is set as described above since the dot interpolation of the long body and the flat body, the contents (dot address) of the register 44 is the dot notation width (dx) in accordance with the enlargement and reduction ratio specified for each interpolation process of 1 dot. The contents of the register 48 are not updated as a result, but the data at the initial setting is maintained as it is. In addition, the contents of the register 42 and the contents of the register 31 are added by the addition circuit 37 at the end of one main scan / injection, and the contents of the register 46 and the contents of the register 34 are added. Is added by the addition circuit 39, and the data of each addition result is selected by the corresponding data selectors 41 and 45 under the control of the selection control circuit 49 and stored in the registers 42 and 46, respectively. . At this time, among the registers 31 and 34 indicating the dot-indentation widths in the sub-scanning direction, the dot-indentation width dy in accordance with the designated magnification / reduction ratio is set in the register 34, and the register 31 has a stagnation ( Or "0" is set as described above since the dot interpolation of the long body and the flat body, and the content (dot address) of the register 46 is the dot indentation width (depending on the designated magnification / reduction ratio each time one scanning or scanning is executed). dy), but the contents of the register 42 are not updated as a result and the data at the initial setting is retained.

In this way, interpolation values for the new dot addresses are sequentially output from the interpolation table ROM 58, and the interpolation values are compared with the threshold value th of the register 50 by the comparator 59 to generate new dot information.

The new dot information after interpolation processing output from the comparator 59 is stored in the shift register 60 in turn and sent to the CPU bus 12 in units of 1 byte.

At this time, in the case where the dot interpolated character pattern data sent to the CPU bus 12 is written into the line buffer 18 of the printing control unit 17, for example, for printout, it is set to 1 in the offset register 28. When an offset value within the range of 7 to 7 dots is set (for example, when the dot interpolated ruby letter is moved below i (i = 1, 2, ..., 7) dots at the time of printout), or a pattern The number of dots in the main / scanning direction of the converted characters does not need to be a multiple of the write width (8 dots) of the image memory to be output, and must be combined with the byte boundary (write width) on the image memory side. In the case where the offset value i is set or the like, the offset data generation unit 29 generates offset data (i " 0 " s) in accordance with the offset value i of the offset register 28. Before the start of the injection 60), and subsequently dot interpolated data, i.e., converted character pattern dots, is written.

The above operation was performed when stagnant (or long or flat) output targets were used. For example, when the dot interpolation address is generated when the rotating body is output target, each of the registers 31 to 36 is used. With respect to the predetermined rotation angle, data in which the predetermined trigonometric function data in the trigonometric function table 24 is included as one element is set.

That is, if the designated rotation angle is [θ °], the number of dots in the x direction of the original font is [a + 1] and the number of dots in the y direction of the original font is [b + 1], the register ( 31) DX1 = -dxsinθ °, register 32 is set to DX2 = dxcosθ °, register 34 is set to DY1 = dycosθ °, and register 35 is set to DY2 = dysinsinθ °. .

θ°

90°일 때 X1 init=1/2a-1/2(a+1-dx)cos2θ°, Y1 init=-1/2(1-dy)-1/2(a+1-dx)dy/dx sin2θ°, (2) 90°

θ°

180°일때 X1 init=a+1/2(1-dx)-1/2(b+1-by)dx/dy sin2θ°, Y1 init=1/2b+1/2(b+1-dy)cos2θ°, (3) 180°

θ°

270°일때 X1 init=1/2a+1/2(a+1-dx)cos2θ°, Y1 init=b+1/2(1-dy)+1/2(a+1-dx)dy/dx sin2θ°, (4) 270°<θ°<360°일때 X1 init=1/2(1-dx)+1/2(b+1-dy)dx/dy sin2θ°, Y1 init=1/2b-1/2(b+1-dy)cos2θ°를 각각 세트한다.In addition, the registers 33 and X1 init and the registers 36 and y1 init are (1) 0 °.

θ °

At 90 ° X1 init = 1 / 2a-1 / 2 (a + 1-dx) cos2θ °, Y1 init = -1 / 2 (1-dy) -1/2 (a + 1-dx) dy / dx sin2θ °, (2) 90 °

θ °

At 180 ° X1 init = a + 1/2 (1-dx) -1/2 (b + 1-by) dx / dy sin2θ °, Y1 init = 1 / 2b + 1/2 (b + 1-dy) cos2θ °, (3) 180 °

θ °

At 270 ° X1 init = 1 / 2a + 1/2 (a + 1-dx) cos2θ °, Y1 init = b + 1/2 (1-dy) +1/2 (a + 1-dx) dy / dx sin2θ °, (4) 270 ° <θ ° <360 ° X1 init = 1/2 (1-dx) +1/2 (b + 1-dy) dx / dy sin2θ °, Y1 init = 1 / 2b- 1/2 (b + 1-dy) cos2θ ° are set respectively.

As described above, each set value (DX1, DX2, DY1, DY2, X1 init, Y1 init), such as dot indentation width and initial address, including trigonometric function data according to the rotation angle (θ °), is calculated, respectively. After setting in the registers 31 to 36, a dot interpolation address generation process for the main, scanning direction and sub-scanning direction as described above is executed in sequence, thereby obtaining a rotating character pattern dot according to the designated angle (θ °). Lose.

In addition, during the generation process of the dot interpolation address when the oblique character is used as the output target, the predetermined trigonometric function in the trigonometric function table 24 according to the specified inclination angle is specified for the specific register in the registers 31 to 36. Data including data as one element is set.

That is, if the designated inclination angle is "θ °", the number of dots in the x direction of the original font is [a + 1] and the number of dots in the y direction of the original font is [b + 1], 0 ° <θ. In the range of ° <90 °, DX1 = dxtanθ ° in the register 31, DX2 = dx in the register 32, DY1 = dy in the register 34 and DY2 = 0 in the register 35, respectively. In the register 33, X1 init = 1/2 (1-dx)-(b + 1-dy) dx / dy tanθ °, and in the register 36, Y1 init = -1 / 2 (1-dy). Are set respectively.

As described above, each set value (DX1, DX2, DY1, DY2, X1 init, Y1 init), such as dot indentation width and initial address, including trigonometric function data according to the inclination angle θ °, is calculated, respectively. After setting in the registers 31 to 36, italic character pattern inclined according to the designated angle (θ °) by sequentially performing the above-described boat interpolation address generation processing for the main, scanning and sub-scanning directions. You can get a dot.

As described above, according to the set values (DX1, DX2, DY1, DY2, X1 init, Y1 init), such as dot indentation width and initial address, including trigonometric function data according to the designated angle (θ °). Boat interpolation address generation processing for the main, scanning and sub-scanning directions is executed in order to obtain new dot information based on the generated dot interpolation address. The new dot information is sequentially stored in the shift register 60 as described above, and becomes an output object via the CPU bus 12 in units of bytes (8 bits). For example, it is written to the line buffer 18 of the print control unit 17.

At this time, since the line buffer 18 is generally composed of the bit side (for example, 8 × 3 = 24 dots vertically) corresponding to the dot structure of the print character height, the modified characters such as the above-mentioned rotating body characters and italic characters. Is not accommodated in the size of 24 dots except for the reduction pattern. Therefore, in such a case, the characters converted by the CPU 10 to which the newly generated character pattern is divided into a plurality of zones at the time of initial setting of the register into a plurality of zones, and the angle, enlargement / reduction ratio, etc. of the character are converted. The data of the register 25 is decreased (-1) each time the pattern is written in the unit of the zone by calculating the number of zones for the zone and setting the data indicating the number of zones in the zone designation register 25. Until the contents become "0", the pattern data of each zone is treated as the same character pattern. In other words, for the area designated by the area designation register 25, continuous dot factor designation is executed without interleaving an area (line spacing) between the patterns. An example of the zone division at this time is shown in FIG.

The means for calculating the number of zones includes a rectangle (square) in the x and y directions that circumscribes the characters converted (deformed) at a designated rotation angle, tilt angle, enlargement, and reduction ratio, as shown in FIGS. 7 and 8. ), And the number of dots (x, y dots) of the two sides of the squares which are in contact with each other, and is set in the registers 21 and 22 as data of V size and H size at the initial register setting. Therefore, it can be easily recognized. That is, in a character converted at an angle, the writing (handling) of the character is performed based on an area of horizontal and vertical rectangles circumscribed to the character, for example, dot interpolation processing for a printout. In the city, the area number can be easily obtained by dividing the H size data stored in the register 22 by the bit width &quot; 24 &quot; of the line buffer 18, and in the case of dot interpolation processing at display output, the register ( The number of zones can be easily obtained by dividing the V size data stored in 21) by the bit width &quot; 24 &quot;

Further, by arbitrarily giving arbitrary zoning data to the zoning register 25, image data of the designated same zone can be continuously and repeatedly image developed. As a result, the character pattern deformed by the dot interpolation process can be printed or displayed as a modified character pattern which is partially or entirely redundant.

The V size and H size data described above are also referred to when setting the character pitch and when processing the underline / radiation. That is, the characters such as the inclination and rotation obtained by dot interpolation having an arbitrary inclination angle in the scanning direction as described above have the height (character height) and width (character width) of the entire character being inclined angle or in addition to that. It varies depending on the reduction factor. Therefore, when the above-described modified characters are outputted in the usual line, column direction (x, y direction), the character pitch, underline / line, etc. cannot be determined by the existing fixed parameter designation means.

Therefore, the above-mentioned circumscribed rectangles are also treated as the body face of the character in the processing of the character pitch, underline / radiation, and the like. These processing means will be described below.

First, the processing operation of the character pitch will be described. When the dot interpolation process for one character is executed as described above and a newly generated dot image for one character is to be outputted, for example, each time it is developed (written) in the line buffer 18 in the print control unit 17. The CPU 10 determines whether or not the contents V size of the register 21 have been updated. If the contents of the register 21 are not updated, the print control unit 17 serves as control data for displaying the character pitch of the data (V size) stored in the register 21, plus the value of the value 1/2. The pitch of the characters to be supplied to and expanded on the line buffer 18 is controlled. When the contents of the register 21 are updated, 1/4 of the sum of the data before the update and the updated data is stored in the specific register area at the time of the update and stored in the specific register area. Is added to the updated data stored in the register 21 again and supplied to the print control unit 17 as control data indicating character pitch, and the pitch of the characters developed on the line buffer 18 is controlled.

Thus, for a character converted at an angle, the writing (handling) of the character is performed based on the horizontal and vertical rectangular area that circumscribes the character, so that the width of the rectangle (in the case of printout) The pitch between adjacent characters is determined along V size and H size for display output. The pitch control as described above is also performed for the row pitch. FIG. 9 shows an example of setting the character pitch CP and the row pitch LP for various modified characters at this time.

In addition, the above pitch control always determines the pitch while considering the area occupied by adjacent characters (circumscribed rectangle). However, in order to simplify the processing, the pitch control is based on the value of the register 21 (or register 22) at that time. You may take control means for determining.

Next, the operation at the time of outputting the underline / radiation on the basis of the circumscribed rectangle described above will be described. In this case, the data V size stored in the register 21 is referred to in the case of printout, and the data H size stored in the register 22 is referred to in the case of display output. Here, the processing operation of the underline / radiation will be described taking the case of the printout as an example. The underline / radiation control unit 23 installed in the print control unit 17 draws a line of underline or radiation on the line buffer 18 according to the underline / radiation instruction included in the print control information input through the CPU bus 12. However, for the deformed characters such as rotation and italic type as described above, it is not possible to respond to the line expansion by the normal character width.

Therefore, when the contents (V size) of the register 21 are always inputted, and if there is an indication of the underline / radiation, the underline / radiation dot pattern is generated with the line length corresponding to the contents of the update data of the register 21 at that time. The pattern is developed on the buffer 18 in correspondence with the character.

FIG. 10 shows an example of development of underlines for various modified characters at this time.

As described above, according to the present invention, a dot interpolation device for dot interpolation of a character pattern having a predetermined dot matrix configuration in at least the main, scanning direction, or sub-scanning direction is used in the output control device of the interpolation dot pattern. Means for generating dot interpolation addresses in the main / scanning direction indicated by components, and interpolation dot address generating means for generating dot interpolation addresses in the sub-scanning directions indicated by the x and y components, and the interpolation dot address generating means. Interpolation dot generation means for generating interpolation dots of coordinate points corresponding to each of the dot interpolation addresses generated by the interpolation dot and interpolation dot information generated by the interpolation dot generation means. Shift register for storing with bit length corresponding to write width, and note A character pattern generated by dot interpolation, comprising offset data generating means for selectively generating an offset value within a bit range corresponding to a writing width of said image memory prior to writing interpolation dots for each phase, and writing to said shift register; The image for each deformed character when the original letter itself is transformed according to an arbitrary magnification, reduction factor, angle, etc. with high-precision dot interpolation, so that the dot writing start position can correspond to the writing boundary of the image memory. Since the data can be easily handled and arbitrary characters can be moved within the range of the write width of the image memory, the output function of the dot interpolated character pattern can be expanded.

Claims (1)

An output control device of an interpolation dot pattern of a dot interpolation device configured to dot interpolate a character pattern having a predetermined dot matrix configuration in at least the main, scanning direction, or sub-scanning direction, the main / scanning direction represented by the x component and the y component. Interpolation dot address generating means (31-49) for generating a dot interpolation address and generating a dot interpolation address in the sub-scanning direction represented by the x component and the y component; Interpolation dot generation means (58) for generating interpolation dots of coordinate points corresponding to the respective dot interpolation addresses generated by the interpolation dot address generating means; A shift register 60 for promoting interpolation dot information generated by the interpolation dot generating means with a bit length corresponding to the write width of the image memory in which the dot interpolated character pattern is developed; And offset data generating means 29 for selectively generating an offset value within a bit range corresponding to a write width of the image memory prior to writing interpolation dots for each scan and scan with respect to the shift register. And a write start position of the character pattern dot generated by the dot interpolation so as to correspond to a writing boundary of the image memory.

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