JPH02166497A - Conversion system for graphic segment drawn character - Google Patents

Abstract

PURPOSE:To improve the representation effect of segment drawn character by converting a segment drawn character strings into a set of control instruction strings for graphic drawing depending upon a device with thickness corresponding to the size of the segment drawn characters. CONSTITUTION:A storage means 1 is stored with control instruction strings for graphic drawing to be converted which are independent by devices and a storage means 2 is stored with relative coordinate values of segments when the characters are developed into segments in one-character units. A conversion processing means 3 converts the device-independent control instruction strings for graphic drawing into device-dependent control instruction strings for graphic drawing and a segment drawn character converting circuit 4 converts device-independent control instructions for segment drawn character string drawing which are read out of a converting means 3 into a set of device-dependent control instructions for segment drawn character drawing by referring to the storage means 2 and determines the thickness of segment drawn characters according to the size of the segment drawn characters. Then a graphic output device 5 outputs device-dependent control instruction strings for graphic drawing as a graphic form. Consequently, the representation effect of the segment drawn characters is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a graphic line segment drawing character conversion method, and particularly to a method for converting a device-independent graphic drawing control command string into a device-dependent graphic drawing control command string. The present invention relates to a graphic line segment drawing character conversion system drawn by line segments in a conversion system for a graphic line segment drawing control command sequence that is output as line segment drawing information to a graphic output device such as a CRT, an XY plotter, or a Japanese printer.

(Prior art) Conventionally, in the conversion method of figure line segment drawn characters drawn by this type of line segments, even if the size of the line segment drawn characters is changed, the thickness of the line segments constituting the line segment drawn characters is changed. remained constant.

(Problems to be Solved by the Invention) The above-mentioned conventional graphic line segment drawing character conversion method that is drawn using line segments does not change the thickness of the line segments that constitute the line segment drawing character even if the size of the line segment drawing character is changed. Since the value remains constant,
When the size of line segment drawn characters increases, there is a drawback that the line segment drawn characters become less noticeable compared to the size of the character.

The present invention has been proposed in view of the above, and its purpose is to improve the expressive effect of line segment drawn characters by device-dependently drawing line segment drawn character strings with a thickness corresponding to the size of the line segment drawn characters. The object of the present invention is to provide a graphic line segment drawing character conversion method that converts a graphic line segment drawing control command sequence into a set of graphic drawing control command sequences.

(Means for Solving the Problems) A figure line segment drawing character conversion method according to the present invention converts a line segment drawing character string drawing control command drawn by a line segment in a device-independent figure drawing control command string into a device-dependent drawing control command. In a figure line segment drawing character conversion method for converting into a set of control commands for drawing line segment drawing characters drawn by line segments, a first storage means stores a device-independent figure drawing control command sequence to be converted; Relative F of a line segment when a single character is expanded into a line segment
a second storage means in which an i-standard value is stored; a graphic output device that outputs the converted device-dependent graphic drawing control command string as a graphic; and a graphic output device that outputs the device-independent graphic drawing control command string as a graphic. a conversion processing means for converting a line segment drawing character string drawing control command that is called from the conversion processing means and is device-independent into a device-dependent line segment drawing control instruction string by referring to the second storage device; a line segment drawing character conversion processing means for converting the line segment drawing character into a set of control commands for drawing the line segment drawing character; and determining the thickness of the line segment drawing character according to the size of the line segment drawing character in the line segment drawing character conversion processing means. and processing means for.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the graphic line segment drawing character conversion method according to the present invention.

In FIG. 1, a storage means 1 is set, for example, on a core memory, and stores a device-independent graphic drawing control instruction string to be converted into a device-dependent graphic drawing control instruction string.

The storage means 2 is set, for example, on a core memory, and stores relative coordinate values of line segments when characters of one character size are developed into a set of line segments.

The conversion processing means 3 takes out the graphic drawing control command string stored in the storage means 1 one by one and converts it into a device-dependent graphic drawing control command string.

When a line segment drawing character string drawing command is detected, the necessary information is sent to the line segment drawing character conversion processing means 4 via the register 6.
pass it on to

Based on this information, the line segment drawing character conversion processing means 4 refers to the relative coordinate values of the line segments stored in the storage means 2 and converts the line segment drawing character string drawing command into a device-dependent line segment drawing command. Convert to a set. This conversion result is returned to the conversion processing means 3.

The conversion processing means 3 sends the converted device-dependent graphic drawing control command sequence to the graphic output bag fi5 at the stage when the conversion processing of all the graphic drawing control commands is completed.

The graphic output device 5 is constituted by, for example, a CRT, and decodes the device-dependent graphic drawing control command sequence received from the conversion processing means 3 and displays it on the screen.

The outline of the operation of this embodiment method has been explained above, but next, the first
The processing procedure of the conversion processing means 3 in the illustrated embodiment will be explained with reference to FIG. 2. Here, as shown in FIG. 4, the storage means 1 includes a character size command having the size of a line segment drawing character, a line segment drawing character string drawing command having coordinate values and character strings for drawing a line segment drawing character. and other graphic drawing control instructions are stored in any order, and there are no particular restrictions on the order or number of times these instructions appear.
A device-independent graphic drawing control instruction string created by an application program or the like is stored in the memory I'll, and then the conversion processing means 3 is activated.

Now, when the conversion processing means 3 is activated, it starts the process shown in FIG. 2, and inputs one command from the storage means 1 (SIO
), then it is determined whether or not the processing of all commands has been completed (520), and if the processing of all commands has been completed, the conversion data is output to the graphic output device 5 (S80), and the conversion processing is performed. finish.

If processing of all commands has not been completed, the command type is determined (530), and if it is a character size command, the current value of character size is stored in the work area (540).
), the process moves to reading the next instruction (310).

If the input command type is a line segment drawing character string drawing command,
A character string drawing coordinate value, a current character size value, a character string and a conversion matrix value for converting device-independent coordinate values into device-dependent coordinate values are set in the register 6, and the line segment drawing character conversion processing means 4 560), and the process moves to reading the next instruction (310).

If the input command type is neither character size, line segment drawing, nor character string drawing, the command is converted from a device-independent figure drawing control command to a device-dependent figure drawing control command (370); Various known methods are used for this conversion method, but their explanation will be omitted here.

Thereafter, the process moves to reading the next instruction (SIO).

Through the processing described above, a device-independent graphic drawing control instruction string is converted into a device-dependent graphic drawing control instruction string, which is output to the graphic output device.

Next, the processing procedure of the line segment drawing character conversion processing means 4 in the embodiment shown in FIG. 1 will be explained with reference to the flowchart shown in FIG. 3. This conversion process converts a line segment character string drawing command into a set of line segment drawing commands, which are one of device-dependent figure drawing control commands.

The current character size passed through the register 6 is calculated as a multiple of 2 of the arbitrarily determined basic size, and this value is set as n (FIO).

Next, let m be the thickness of the line segment drawn character when outputting the line segment drawn character to the device, and find the value of m from m=2n+l (
F20).

After that, a character is drawn based on the character string drawing coordinate value, character size value, character string and conversion matrix passed through the register 6, and the relative coordinate value obtained by expanding the character stored in the storage means 2 into a set of line segments. The column is converted into a device-dependent line segment drawing command group (F30).

Furthermore, check whether the thickness m of the line drawn character is 1 or not using F4.
0), if it is 1, it returns to the conversion processing means 3 that is the calling source.If 6m is not 1, it is determined whether m is an even number or not. The line segment drawing character string is converted into a device-dependent line segment drawing command group by shifting it to the left or below the line segment group drawn by the command group by the line thickness inherent to the device (F70).

If m is an odd number, similar processing is performed to shift the image to the right or upward or diagonally upward (F60).

In this way, the line drawn on the device in process F60 or F80 is thickened by the thickness of the line inherent in the device.The process for m=m-1 of the 0th order is performed, and the process moves on to process F80m and process F.

Through the above processing, device-independent line segment drawing character string drawing commands are converted onto the work area as a set of device-dependent line segment drawing commands.

By performing the above-mentioned processing, a device-dependent set of control command strings for drawing a line segment is created with a thickness corresponding to the size of the line segment drawing character as shown in FIGS. 5(A) to 5(C). can be converted to . Figure 5 (A) shows the characters in the basic size and line thickness; Figures 5 (B) and (C) show the characters at double size, three times the line thickness and four times the line thickness. The characters are twice as thick and five times as thick.

(Effects of the Invention) As explained above, the present invention converts line segment drawing character string drawing control commands in a device-independent figure drawing control command sequence into a set of device-dependent line segment drawing character string drawing control commands. A group of line segments whose coordinate values are obtained by shifting the coordinate values of a group of device-dependent line segment drawing commands to be converted alternately up and down, left and right, or diagonally up and down by the device-specific line thickness. By repeatedly outputting the line segment drawn character until it reaches the calculated thickness, the line segment drawn character output to the graphic output device is outputted with a thickness proportional to the nth root of 2 of the size. There is an effect that can be done.

Minute drawing character conversion processing means, 5...Graphic output device, 6.
··register.

Claims (1)

[Scope of Claims] A set of control commands for drawing character strings to draw line segments drawn by line segments in a device-independent string of control commands for drawing figures, and a control command for drawing character strings to draw line segments drawn by device-dependent line segments. In the figure line segment drawing character conversion method, the first storage means stores a device-independent figure drawing control command sequence to be converted, and a second storage means in which relative coordinate values are stored; a graphics output device that outputs the converted device-dependent graphics drawing control instruction string as a graphics; and a graphics output device that outputs the device-independent graphics drawing control instruction string to the device. a conversion processing means for converting into a dependent figure drawing control instruction string; a line segment drawing character conversion processing means for converting the line segment drawing character into a set of drawing control commands; A graphic line segment drawing character conversion method, comprising: a processing means for determining.