KR970003326B1 - Character graphics generating circuits - Google Patents

Abstract

None.

Description

Character shape generation circuit

1 is an explanatory diagram of a configuration of one embodiment of the present invention.

2 is an explanatory diagram showing a complex slave connection mechanism of a register and an operator.

3 is a flowchart showing an algorithm of data conversion circuits and operations.

4 is an explanatory diagram of an outline font development process.

5 is an explanatory diagram of an example of an outline font development process time;

6 is an explanatory diagram showing a method of externally updating the contents of a program ROM.

7 is an explanatory diagram of a configuration of another embodiment of the present invention.

8 is a flowchart showing an algorithm of operation of a data conversion circuit.

9 is an explanatory diagram of a configuration example of a raster converter circuit.

10 is a flowchart showing an algorithm of operation of the raster converter circuit.

FIG. 11 is an explanatory diagram of a configuration of another embodiment modified from the embodiment of FIG.

12 is an explanatory diagram of a configuration of another embodiment of a modified embodiment of FIG.

FIG. 13 is an explanatory diagram of a configuration of another embodiment further modified from the embodiment of FIG.

14 is an explanatory diagram of a configuration of another embodiment having two figure generating LSIs.

FIG. 15 is an explanatory diagram of another embodiment further modified from the embodiment of FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character figure generating circuit and a system for generating dot figure character figure data from outline information displayed in a vector form in an information processing device such as a character figure creating device.

Nagashima et al. "DESIGN OF AN OUTLINE FONT RASTERIZING LSI" (IEEE CUSTOM INTEGRATED CIRCUITS CONFERENCE 9-2 pp. 117-119. Is disclosed.

It is an object of the present invention to provide a data generation LSI circuit having a memory having a program for converting contour data into dot data corresponding to input of font data of a selected type.

It is another object of the present invention to provide a character figure generating circuit with reduced circuit scale or configuration of a processing circuit without compromising a series of processes for generating dot figure character figure data from outline information of a character or figure in a vector form. will be.

Another object of the present invention is a dot format that can generate dot-shaped character figure data at high speed and efficiency on a small circuit scale by executing a high-speed process using a dedicated circuit for processing with a high throughput such as contour generation. To provide a data generation circuit.

It is still another object of the present invention to provide a dot format data generation circuit capable of freely changing the contents of the program ROM and the like, even if the character graphic data in the vector format employs various formats.

A circuit block for converting contour data into bitmap data as a character figure generating circuit for achieving the above object is for storing a plurality of instructions for converting font data according to predetermined parameters (elongation / coordinate conversion, curve complement). A first data converting circuit means for performing a conversion, connected to said memory and said font data indicated by a plurality of instructions stored in said memory, said data connected to said register and said calculator and subjected to said conversion sequentially First-in, first-out means for accepting and retaining and outputting the data in the received order; second data conversion circuit means for converting the data connected to the first-in first-out means in order from the first-in first-out means into bitmap data; The bitmap data connected to a second data conversion circuit means A bitmap memory for holding a rudder, wherein the second data conversion circuit means is a raster conversion execution unit for rasterizing the corresponding data, and the second data conversion circuit means generates a paint end signal after finishing the paint of the inner portion of the contour. An end signal generating means, said first data converting circuit means having a register for storing said predetermined parameter and an arithmetic device for calculating said font data, said first data converting circuit means being held by said first-in first-out means; If the data is in a full state, data conversion stops and waits for an empty space; and if the data is empty in the first-in first-out means, the second data conversion circuit means waits until the data is retained therein. The bitmap menu with a controller to control the raster conversion execution unit. Running of the contour inner portion of the converted bit map data in the re-painted, and the circuit block is configured in a single large scale integrated circuit is characterized in that said memory is a programmable ROM.

In a character figure generating circuit that generates character figure data in dot format from outline information of a character or figure displayed in a vector format, a first storage area for storing each set of instructions, and instructions stored in the first storage area. 2nd logical unit which sequentially interprets and converts the contour information to create the target character, and the second logical unit and dot-form character which converts the converted contour information as dot-type data. A circuit having a configuration in which a second storage area for temporarily storing figure data is arranged on the same LSI substrate performs font data conversion at a high speed.

In addition, a configuration in which writeable storage means is used as the first storage area, and the storage means enables writing of necessary data outside of the character figure generating circuit is also contemplated. Moreover, the structure which used RAM as a 1st storage area may be sufficient.

First, a microcomputer of subtraction, addition, multiplication, and Bezier curve generation indicating a part of the processing necessary for generating dot character data from the outline information of the character graphic displayed in the vector format in the first storage area. Remember the instructions in advance.

Next, when the first logical unit receives the contour information in the vector format, the first logic unit interprets the instructions stored in the first storage area, and enlarges / reduces the zoom information according to the magnification held by the user in advance in the contour information. Make a conversion. Such changes include, for example, data extension, coordinate transformation, various correction processes, curve interpolation, and the like. The contour information after the conversion is transmitted to the second logical unit. The second logical unit further converts the transferred contour information to generate dot-shaped character figure data in the second storage area.

As described above, the second logic unit generates the contour information of the character map in the bitmap format in the second storage area from the contour information after various transformations received by the first logic unit, and processes such as painting inside the contour. Run

By providing a first logic unit, a second logic unit, a first storage area, and a second storage area on the same substrate which perform such a process, there is provided a figure generating circuit capable of small size and high speed processing. It becomes possible.

Next, one embodiment of the present invention will be described with reference to FIG.

The structural example shows the structural example of the character figure generation circuit which concerns on this invention used in various information processing apparatuses, such as a word processor, a personal computer, and a printer of FIG.

The character figure generating circuit 4 of this embodiment is connected to the CPU 1, the font RAM 2, and the output engine 3 via a bus 18. Here, the CPU 1 is a central processing unit that executes control of various processes such as character graphics generating circuits, printing, display, etc., and is composed of a semiconductor microprocessor or the like. The font RAM 2 is a means for storing character graphic data displayed in a vector format, and is composed of an electronic device such as a semiconductor IC. The output engine 3 is composed of electronic devices such as various TTLs, coils, power transistors, and the like as means for driving the printer for printing character figure data displayed in dot format, for example, by a printer or the like.

The character figure generating circuit 4 includes a program ROM 5, a data conversion circuit 6, a FIFO 16, and a raster conversion circuit 13.

The program ROM 5 is a means for storing a program which executes processes such as data decompression, coordinate transformation, correction, curve interpolation, and the like in character graphic data in a vector format, and is composed of an electronic device such as a semiconductor IC.

The data conversion circuit 6 has a data conversion control unit 7 and a data change execution unit 10 (multiplier, adder, etc.), reads and decodes the contents of the program ROM 5, and character graphics data in a vector format. It is a means to add various kinds of transformation to.

In addition, the data conversion control unit 7 is configured with an instruction decoder 8 and a program counter PC 9, and is a means for controlling the data conversion execution unit 10 in the data conversion circuit 6.

In addition, the instruction decoder 8 is an instruction decoding means for decoding the contents read from the program ROM 5, and is composed of electronic devices such as various TTL and semiconductor memories.

The program counter PC 9 is a means for controlling the read address of the program ROM 5 having the above-described microinstruction, and is composed of various electronic devices such as TTL and semiconductor memory.

In addition, the data conversion execution unit 10 has a register group 11 and an arithmetic unit 12, and is a means for executing various operations required for executing data conversion processing.

The register group 11 is a means for temporarily storing various instructions, processing results and the like, and is composed of electronic devices such as various TTL and semiconductor memories.

The calculator 12 is a means for performing various operations such as addition and subtraction, and is composed of electronic devices such as various TTL and semiconductor memories.

Next, the FIFO 16 is a so-called first-in first-out storage unit, and is composed of an electronic device such as a semiconductor memory.

The raster conversion circuit 13 is comprised with the control part 14 and the raster conversion execution unit 15, and is a means which generate | occur | produces the dot form character figure data from the data to which conversion was performed by the data conversion circuit 6, Actually, it consists of electronic devices, such as various TTL and semiconductor memories.

The control unit 14 is a means for controlling the execution unit 15 for raster conversion, and is composed of electronic devices such as various TTL and semiconductor memories.

The raster conversion execution unit 15 is a means for executing various operations necessary for executing raster conversion, and is composed of electronic devices such as various TTL and semiconductor memories.

The work memory 17 is a means for temporarily storing data of a character figure in dot format, and is composed of an electronic device such as a semiconductor memory.

It demonstrates by the procedure which outputs a character figure using the apparatus structure of this invention mentioned above.

First, the CPU 1 transmits certain contour information, that is, character graphic data, in vector format stored in the font ROM 2, to the character graphic generating circuit 4 in accordance with an instruction from a program running on the CPU.

The data converting circuit 6 in the character graphics generating circuit 4 reads the instruction group stored in the program ROM 5 according to the value stored in the PC 9, and the instruction decoder 8 reads the read instructions. Decode

The decoded instruction is executed using the register group 11 and the operator 12 in the data conversion execution unit 10. After the execution is completed, the converted data is stored in the FIFO 16.

The raster conversion circuit 13 generates the contour of the character figure on the work memory 17 from the data read from the FIFO 16 using the raster conversion control unit 14 and the raster conversion execution unit 15. The inside of the contour on the work memory 17 is painted.

Finally, the CPU 1 reads the dot-shaped character graphic data generated on the work memory 17, transfers it to the output engine 3, and executes printing, display, and the like.

Here, the reason why the FIFO 16 is provided between the data conversion circuit 6 and the raster conversion circuit 13 is as follows.

The data conversion circuit 6 and the raster conversion circuit 13 operate independently of each other, i.e., asynchronously. For this reason, in order to synchronize data transmission, it is necessary to provide and control the FIFO 16 in the middle. Of course, when the data conversion circuit 6 stores the data in the FIFO 16, if the storage area of the FIFO 16 is already in the full state, the data conversion circuit 6 does not store the data until the empty area is created in the storage area of the FIFO 16. Keep waiting.

When the raster conversion circuit 13 reads data from the FIFO 16, if no data enters the storage area of the FIFO 16 (empty state), the data cannot be read and the data is not written to the FIFO 16. It must wait until it is entered.

FIG. 2 shows the detailed slave connection configuration of the above-described register 11 and operator 12. As shown in FIG. Predetermined coordinate matrix data a, b, c, d, Tx, Ty are input in advance via a console (not shown) connected to the CPU 1 of the user's first diagram, and these data are stored in the register 11a. maintain. The temporary register 11b and the register 11c for point data X and Y are also included in the register 11 together with the register 11a, and are connected by the lines A and B shown. The data of these registers are all calculated by the multipliers 12a and ALU 12b connected in the calculator 12 and input to the FIFO 16 by the following method.

Next, the operation of the character figure generating circuit 4 constituting the main part of the present invention will be described in detail with reference to FIGS.

3 is a flowchart showing an algorithm of the operation of the data conversion circuit 6.

First, the CPU 1 starts the character figure generating circuit 4. If startup is not performed, the operation is waited as it is (step 21).

The data conversion circuit 6 reads the contents of the program ROM 5 sequentially at the address designated by the count value of the PC 9 (step 22), and decodes the read instructions (step 23).

According to the decoded instruction, a predetermined data extension (when the data in the font ROM is compressed) is applied to the character graphic data in the vector format using the register group 11 and the calculator 12 in the data conversion execution unit 10. (Step 24), coordinate transformation such as enlargement or reduction is added to the data after decompression (step 25).

Next, a correction process for matching the line width or the like is applied to the data after the coordinate transformation (step 26), and curve interpolation is applied to the data after the correction process (step 27).

Finally, the data after the curve interpolation is transferred to the FIFO 16 (step 28), and the processes from step 22 are repeated.

By performing the operations from step 21 to step 26, transformation of data decompression, coordinate transformation, correction, curve interpolation, and the like can be applied to character graphic data in a vector format.

Next, with reference to FIG. 4 and FIG. 5, the processing required for generating the bitmap data with painting performed on the outline font data for the creation of the character that is actually "P" will be used. Explain.

Painting is the process of scanning bitmap data from left to right, finding data representing value 1, and converting data 0 between odd-numbered and even-numbered 1's to 1's.

Incidentally, a process for generating dot graphic data in the data after curve interpolation will be described later using a dedicated circuit and a flowchart.

4 is a schematic diagram showing a flow of generating bitmap data on which painting is performed from compressed outer line font data.

5 is a circle graph showing the temporal ratio of each process to the entire process applied to the outline font.

In FIG. 4, reference numeral 201 denotes compressed outer line font data, and the outer line font data is compressed and stored for reducing the communication font ROM capacity.

Reference numeral 202 denotes data after the decompression processing is performed on the compressed outline font data.

Reference numeral 203 denotes data after coordinate transformation such as enlargement or reduction is applied to the decompressed data.

Reference numeral 204 denotes data after a correction process for matching the line width of the character figure to the coordinate-converted data.

In 203, the line width is 3 bits, whereas in 204, the line width is 2 bits.

Reference numeral 205 denotes data on which curve interpolation processing is performed to add smoothness to the corrected data.

Reference numeral 206 denotes data for which a straight line is generated between the data of 205 and a contour generation process for generating contours of character graphics.

Finally, 207 is data after applying a painting process to the data of 206, and the data of this 207 becomes bitmap data of a character figure.

The processing until the data 201 reaches 207 will be described.

First, since the outline line font data of 201 is usually compressed to relative coordinate values, the data decompression processing expands by adding the relative coordinate values sequentially.

For this reason, the processing necessary for data decompression is the addition of the increment values of the X and Y coordinates.

The coordinate change is based on the coordinate values (X, Y). XA = aX + bY + Tx, YA = cX + dY + Ty , d, Tx, and Ty are coordinate matrix data previously input to the register 11a, where a is a one-row, one-column element, b is a one-row, two-column element, c is a two-row, one-column element, and d is a two-row element. The linear conversion equation is a two-column element, Tx is a one-row, three-column element, and Ty is a two-row, three-column element). The data during the calculation on the right side of these two equations enters the temporary register 11b, and the final result, that is, the result on the left side, enters the register 11c. The register 11c has the coordinate value after 4 points of conversion.

As shown in the above formula, the processing necessary for the coordinate transformation is the multiplication and addition of the coefficients with respect to the X and Y coordinate values, and is executed by the multipliers and the ALUs 12a and 12b.

Next, the correction process is a process of matching the line width of the character figure by moving the designated coordinates inward.

Since the number of coordinates to be moved is hydrogen per one-character figure, the throughput is extremely small, but the processing itself is complicated by various determinations regarding the movement.

Next, curve interpolation is a process of generating a point for generating a new number of characters in a designated area and applying character smoothness to generate.

Since the designated area is a small amount per one-character figure, the number of processes itself is small, but the process itself is complicated by the determination of additional points.

The contour generation process then generates a straight line between the coordinates to generate the contour of the character figure.

Since the process of generating a straight line between the coordinates can connect the coordinates between the coordinates by a point sequence, the number of the generated point sequences is huge.

Finally, the painting process fills the inside of the outline of the character figure with dots (dots), and the number of dots generated (dots) is huge.

Therefore, the processing necessary for the generation of the contour and the painting is extremely large.

As described above, data decompression, coordinate transformation, correction, and curve interpolation have relatively low throughput, but the processing itself is complicated.

On the other hand, contouring, painting, etc., the processing itself is simple but the throughput is huge.

FIG. 5 shows a configuration of an approximate processing time for each process occupied by the entire outline line font development time.

As is clear from FIG. 5, although there are some errors, the contour generation and the painting process account for 65% of the total.

Relatively low throughput such as data decompression, coordinate conversion, correction, and curve interpolation are performed at low speed using a circuit that operates every step according to a predetermined program. It is preferable to perform a process requiring high speed execution at high speed using a dedicated circuit.

Therefore, only the contour generation and the painting process are executed at high speed by a dedicated circuit, and other processes are executed at a low speed by a circuit operating every step according to a predetermined program without degrading the processing speed and function. The circuit scale can be suppressed.

In addition, since a circuit that operates every step according to a predetermined program can share a calculator, a decoder, a register, a program ROM, and the like, the circuit scale may be extremely small compared with the case of having a dedicated calculator, register, or the like for each processing. .

In addition, although a circuit which operates every step according to a predetermined program has a lower execution speed than a dedicated circuit, a low speed is not a problem because the processing executed by the circuit is relatively small in throughput.

Next, if the character graphic data of the vector format stored in the font ROM 2 conforms to the font data not corresponding to the program stored in the program ROM 5, it may not operate correctly. Next, the corresponding method for font data in various formats will be described in detail with reference to FIGS.

First, the first method will be described with reference to FIG.

This embodiment has a data conversion circuit 6, a raster conversion circuit 13, a FIFO 16, a work memory 17, a rewritable program ROM 18, and a ROM writer 31.

Since the data conversion circuit 6, the raster conversion circuit 13, the FIFO 16, and the work memory 17 can be realized using the same components as those described in FIG. 1, detailed descriptions thereof are omitted here.

The program ROM 18 is constituted of a so-called PROM (program room) or the like which is a semiconductor IC as a means for storing a program.

The ROM writer 31 is a means for writing data to the program ROM 18. The ROM writer 31 is composed of an electronic device such as a CPU, various TTLs, a data bus, and an interface connector.

It is also assumed that the program ROM 18 stores a program that does not already correspond to the format of the font data.

Since it does not operate correctly in this state, the ROM writer 31 is used to rewrite the program corresponding to the font format.

Here, the ROM writer 31 and the character figure generator of FIG. 1 are separate devices, and the ROM writer 31 electrically writes data to the program ROM 18.

After writing the program corresponding to the font format, performing operations from step 21 to step 28 in FIG. 3 to perform transformations such as data extension, coordinate transformation, correction, and curve interpolation on the character graphic data in the vector format. It becomes possible.

In general, PROMs are rewritable and can respond to font changes.

If the manufacturer only needs to write the processing program corresponding to the font requested by the customer at the time of shipment, it is good to use a ROM that can be written only once.

Next, the second method will be described in detail with reference to FIGS. 7 and 8.

FIG. 7 is an example of a block diagram for performing the second method in an information processing apparatus such as a word processor, a personal computer, a printer, and the like. FIG. 8 is a flowchart showing an algorithm of the operation of the seventh figure generator.

In this embodiment, a CPU 1, a font ROM 2, an output engine 3, and a character graphics generating circuit 41 are configured. Here, the CPU 1, the font ROM 2, and the output engine 3 can use the same ones as the embodiment described in FIG.

In addition, the character figure generating circuit 41 includes a program RAM 42, a data conversion circuit 6, a FIFO 16, and a raster conversion circuit 13.

Since the data conversion circuit 6, the FIFO 16, and the raster conversion circuit 13 can use the same ones as the embodiment described in FIG. 1, detailed description thereof will be omitted.

The program RAM 42 is a means for storing a program for executing processing such as data decompression, coordinate transformation, correction, curve interpolation, and the like in character graphic data in a vector format, and is composed of an electronic device such as a semiconductor memory.

Next, the procedure of outputting a character figure using the character figure generating device 2 of FIG. 7 will be described in detail with reference to FIG.

First, the CPU 1 writes a program to the program RAM 42 (step 51), and starts the character figure generating circuit 41 (step 52).

If it does not start, it waits as it is.

The data conversion circuit 6 sequentially reads the contents of the program RAM 42 (step 53), and decodes the read instructions (step 54).

In accordance with the decoded instructions, the register group 11 and the operator 12 in the data conversion execution unit 10 are used to convert the data decompression (when the data is compressed in the font ROM 2) into character graphic data in a vector format. (Step 55), coordinate transformation such as enlargement or reduction is applied to the data after decompression (step 56).

Next, a correction process is performed to match the line width and the like to the data after the coordinate transformation (step 57), and a curve interpolation process is performed on the data after the correction process (step 58).

Finally, the data after the curve interpolation is transferred to the FIFO 16 (step 59), and the processing from step 53 is repeated.

By performing the operations from step 51 to step 59, data decompression, coordinate transformation, correction, curve interpolation, and the like can be performed on character graphic data in a vector format.

By using the first or the second method described above, even when the vector-format character graphic data has various formats, it is possible to easily generate the dot-shaped character graphic data.

As described above, the processing required and the throughput of each processing until the generation of the bitmap data in which the painting is performed from the outline font data with respect to the creation of the character that is actually "P" have been described using FIGS. 4 and 5. Finally, the procedure for generating the character figure data in dot format from the data after the curve interpolation will be described again using the dedicated circuit shown in FIG. 9 and the processing flowchart shown in FIG.

FIG. 9 is a detailed explanatory diagram of the raster conversion circuit 13 in FIG. 1, and FIG. 10 is a flowchart showing an algorithm of the operation of the raster conversion circuit 13. As shown in FIG.

The raster conversion circuit 13 shown in FIG. 9 is comprised with the control part 14 and the raster conversion execution unit 15. As shown in FIG.

Moreover, the control part 14 is comprised with the outline generation control part 61 and the painting control part 63. As shown in FIG.

Here, the contour generation control section 61 is a means for controlling a process of generating a straight line between coordinate points to generate an outline of a character figure on the work memory 17, and is composed of various TTL and other electronic devices.

Here, the painting control part 63 is a means for controlling the process of painting the inside of the outline of a character figure, and is comprised by electronic devices, such as various TTL.

Moreover, the raster conversion execution unit 15 is comprised with the outline generation execution unit 62 and the painting execution unit 64. As shown in FIG.

Here, the contour generation execution unit 62 is constituted of electronic devices such as various TTLs as means for actually executing a calculation required for contour generation.

Here, the painting execution unit 64 is constituted by electronic devices such as various TTLs as means for actually executing the calculations required for painting.

Next, the procedure from the data after curve interpolation using the raster conversion circuit 13 to generating the dot-shaped character figure data on the work memory 17 will be described with reference to FIG.

First, the contour generation control unit 61 reads the value of the FIFO 16 shown in FIG. 1 and accepts coordinate data (step 71).

Lines are generated between the coordinate data and drawn on the work memory 17 (step 72).

If the generation of the outline is finished for the single-character figure, the painting control unit 63 is started, and if not, the process from step 71 is repeated to continue the generation of the outline (steps 73 and 74).

The painting control part 63 which started up reads the data on the work memory 17 (step 75), and paints the inside of an outline (step 76).

If the interior of the outline of the one-character figure has been painted, the CPU 1 is notified that the painting is finished. If the painting has not been completed completely, the operation from step 75 is repeated to continue painting (steps 77 and 78).

By performing the operation from step 71 to step 78, the outline of the character figure can be generated on the work memory 17 and the interior can be painted.

Details of contour generation and painting are described in Japanese Patent Laid-Open No. 59-71093.

As described above, a process having the above-described circuit structure and having relatively low throughput such as data decompression, coordinate transformation, correction, curve interpolation, and the like may be implemented by using a program such as the data conversion circuit 6 to perform a circuit for each step. Processing at low speed.

As a result, the circuit scale can be suppressed.

On the other hand, processing with a high throughput such as contour generation and painting is performed at high speed by using a dedicated circuit such as the raster conversion circuit 13.

That is, a process with a small amount of processing executes a process by a circuit which performs a process every step using a program, suppressing a circuit size, and executes only a process with a large amount of throughput at high speed by the dedicated circuit.

This makes it possible to generate character graphic data in dot format quickly and efficiently without increasing the circuit scale.

In the present embodiment, four processes of data extension, coordinate transformation, correction, and curve interpolation have been described in the data conversion circuit 6, but only the configuration necessary for the above four processes is performed or other than these. It is good also as a structure which granulates a process.

11 shows another embodiment.

The program is stored in advance in a disk device 82 such as a hard disk HD or a floppy disk FD, and the programs of HD and FD are written to the program RAM 42 of the character generating LSI. The structure of other circuit blocks may be the same as that of FIG.

FIG. 12 shows another embodiment in which the character graphics generating circuit 4 is connected to the program ROM 5 as shown to verify that a predetermined current flows in the selected bit of the selected address in the ROM. Has a PROM write circuit 93 therefor. The write circuit is connected to the ROM writer 96, and the address and the bit are instructed by the ROM writer to write to the ROM 5 described above. Therefore, according to this embodiment, writing to the nonvolatile memory can be performed by the user of the character figure generating circuit.

13 shows A font data in accordance with the font type selected / input from both font ROMs A and B by the terminal device 101 connected to the program RAM 42 on the character graphics generating circuit 41 via a bus. Either one of the ROM 2 having the B font data or the ROM 2 having the B font data is selected, and a program corresponding to one of the font data is read from the disk device 82 and written to the program RAM 42. A character graphics system 102 is shown.

In the above-described embodiments, the description of the blocks having the same block number is the same as that of the functional description in the series of the embodiments described above, and thus the description thereof is omitted.

FIG. 14 shows another embodiment in which another LSI 4 is connected to the bus 18 in the system shown in FIG. The program holding unit 112, which is connected to the two LSIs 4 via the bus 18, has several instruction set A, B, C,... Which are to be stored in the program RAM 42 and 42. In accordance with a designation inputted through a terminal device (not shown) connected to the CPU 1, a desired set of instruction groups is loaded into the RAM 42 and 42 of each LSI 4. In this embodiment, a combination of several fonts desired by the user can be constructed on the system.

FIG. 15 shows two font cassette ROMs 132, 134 and one of which take the form of a cassette ROM corresponding to two font types instead of the font ROM 2 connected to the bus 18 shown in FIG. Another embodiment in which a floppy disk device 133 for sending a program in accordance with the font of the program to the program RAM 42 is connected.

The program corresponding to the other font is stored together with the font data in the other font cassette ROM. It is also possible to construct a system having a configuration in which several cassettes of the font ROM cassette 132 type or several cassettes of the font ROM cast 134 type are provided.

Claims (20)

A circuit block for converting outline data into bitmap data, the memory 5 for storing a plurality of instructions for converting font data according to predetermined parameters (a, b, ... Ty), and connected to said memory, First data converting circuit means 6 for converting font data indicated by a plurality of instructions stored in the memory, connected to the register and the calculator, and sequentially receiving and retaining the converted data; Second data conversion circuit means connected to the first-in first-out means 16 for outputting the data in the order in which the data is received and the first-in first-out means for converting the data output in order from the first-in first-out means into bitmap data ( 13) a bit map memory 17 connected to said second data converting circuit means and holding said bit map data; The first data converting circuit means has a register 11a for storing the predetermined parameter and an arithmetic unit 12 for calculating the font data, wherein the first data converting circuit means is selected by the first-in first-out means to be retained data. In the case of the state, the data conversion stops and waits for the empty area to be generated, and the second data conversion circuit means waits until the data is maintained therein if the data is empty in the first-in first-out means. Shape generation circuit. The method of claim 1, wherein the second data conversion circuit means has a raster conversion execution unit 15 for rasterizing the data and a controller 14 for controlling the raster conversion execution unit. Character-shape generating circuit which paints the inner part of the outline of the converted bitmap data in the map memory. The character figure generating circuit according to claim 2, wherein said second data converting circuit means has end signal generating means for generating a paint end signal after the end of paint of the inner portion of the contour. 2. A character graphics generating circuit as claimed in claim 1, wherein the circuit block is constructed in one large integrated circuit, and the memory is a programmable read-only memory. A character graphic according to claim 1, wherein the first data conversion circuit means comprises means for coordinate transformation of the decompressed data and curve interpolation means for generating a predetermined number of points of data for the decompressed data. Generation circuit. 2. The character graphics generating circuit of claim 1, wherein the circuit block is configured in one large scale integrated circuit, and the memory is a random access memory. A system for converting outline data into bitmap data, the system comprising: a font ROM (2) connected to the CPU (1), the CPU (1), having font data; A circuit block 4 for inputting and converting into bitmap data, said circuit block being connected to said font ROM, and for converting font data according to predetermined parameters (a, b, ..., Ty); A random access memory 42 for storing an instruction, first data converting circuit means 6 for performing conversion, which is connected to the memory and is indicated by fonts stored in the memory, and the register And first-in first-out means 16, which are connected to the calculator and sequentially receive and hold the converted data, and output the data in the order in which they have been received. A second data conversion circuit means 13 for converting the data sequentially output from the first-in first-out means into bit map data, and a bit connected to the second data conversion circuit means and holding the bit map data. And a map memory (17), said first data converting circuit means having a register (11a) for storing said predetermined parameter and an arithmetic unit (12) for calculating said font data, said first data converting circuit means Stops converting data when the first-in first-out means is full to hold data and waits for an empty area to be generated, and the second data conversion circuit means if data is empty in the first-in first-out means. A graphics conversion system that waits for a to remain in it. 8. The device according to claim 7, wherein the second data conversion circuit means has a raster conversion execution unit 15 for rasterizing the data and a controller 14 for controlling the raster conversion execution unit. A character graphics conversion system that paints inside contours of transformed bitmap data in map memory. A character graphics conversion system according to claim 8, wherein said second data conversion circuit means has an end signal generation means for generating a paint end signal after the end of paint of the inner portion of the contour. 8. A character figure according to claim 7, wherein the first data conversion circuit means has means for coordinate transformation of the decompressed data and curve interpolation means for generating a predetermined number of points of data for the decompressed data. Conversion system. A system for converting outline data into bitmap data, the system comprising: a CPU 1, a font ROM 2 connected to the CPU, having font data; and a font data connected to the CPU; A circuit block connected to the disk device 82, the CPU, the disk device, and the ROM for storing a plurality of instructions for decompression in accordance with Ty; 4), wherein the circuit block is connected to the disk device and the font ROM, for storing the several commands for converting font data according to the predetermined parameters (a, b, ..., Ty). A first data conversion circuit means (6) for connecting a random access memory (42) to said memory and for converting font data indicated by a plurality of instructions stored in said memory, and said register First-in, first-out means 16 connected to the first and second calculators, and sequentially connected to the first and second calculators to receive and maintain the converted data in sequence, and output the data in the order in which the data is received. A second data conversion circuit means 13 for converting the data output as it is to bit map data, a bit map memory 17 connected to the second data conversion circuit means, and holding the bit map data; The first data converting circuit means has a register 11a for storing the predetermined parameter and an arithmetic unit 12 for calculating the font data, wherein the first data converting circuit means is a preservation data. In the full state, data conversion is stopped and the amplifier region is waited to be generated. The second data conversion circuit means Based first-in, first-out during the election means that the data is the data status amp tee characters and graphics convert the system to wait to be maintained therein. 12. The apparatus according to claim 11, wherein the second data conversion circuit means has a raster conversion execution unit 15 for rasterizing the data and a controller 14 for controlling the raster conversion execution unit, and the bit A character graphics conversion system that paints inside contours of transformed bitmap data in map memory. 13. A character graphics conversion system according to claim 12, wherein said second data conversion circuit means has an end signal generating means for generating a paint end signal toward said CPU after the end of paint of said inner portion of the contour. 12. The apparatus of claim 11, further comprising a terminal device 101 connected to the CPU, a separate font ROM 2 'having font data different from the font data of the font ROM 2, The disk device stores a plurality of separate instructions for decompressing the other font data according to separate predetermined parameters (a, b, ..., Ty), and the random access memory has instructions for inputting to the terminal device. Therefore, a character graphics conversion system in which one of the two kinds of commands is stored. 12. The disk cassette of claim 11, wherein the disk device is a floppy disk device 133, the font ROM has a format of a cassette, and the font cassette ROM 134 having font data different from the cassette is provided. A character graphics conversion system which stores several separate commands for decompressing separate font data according to separate predetermined parameters (a, b, ..., Ty). A character graphics conversion system according to claim 15, further comprising an output engine (3) connected to said CPU, said disk device, and said ROM, for outputting said bitmap data. In a character figure generating circuit which generates character figure data in dot format from outline information displayed in a vector format, a first storage area for storing various commands and a command stored in the first storage area are sequentially analyzed. And a first logical unit for converting the contour information to create a target character, a second logical unit for converting the transformed contour information into dot data and the dot graphic data. And a second figure region on which one LSI chip is temporarily stored. The method according to claim 17, wherein the instruction for displaying a part of the processing necessary for generating the dot-shaped character figure data from the outline information of the character figure displayed in the vector form in the first storage area is stored in advance, The first logic unit is provided with a function of interpreting a command stored in the first storage area, applying a transformation to create a desired character in the contour information, and transmitting the transformed contour information to the second logic unit. And a logic figure generation circuit having a function of converting the transmitted contour information as dot data and generating dot-shaped character figure data in the second storage area. The character figure generating circuit according to claim 17, wherein the memory means writeable as the first storage area is used. A character graphics generating circuit according to claim 17, wherein RAM is used as the first storage area.