KR940011657B1 - Image synthesizer and method thereof - Google Patents

Abstract

When a PC is used with a terminal of a host computer using an emulator, the device displays the special characters to a monitor by synthesizing a usual standard character image data stored in a ROM and a special attribute image data stored in a ROM (3). A decoder (4) decodes the attribute code from a video memory (1) and accesses the ROM (3). The accessed image from the ROM (3) and the character image data in the plane 2 of the video memory (1) are synthesized to an OR gate (5) and the synthesized image is displayed by a video display controller (2).

Description

Apparatus and Method for Shape Image Synthesis Using Attribute Codes

1 is a block diagram showing the main configuration of the magnetic image synthesizing apparatus according to an embodiment of the present invention.

2 is a block diagram of an attribute code decoder logic unit in a shape image synthesizing apparatus.

3 is the attribute bit allocation and the shape address value.

4 is a special attribute bit map and embodiments thereof.

* Explanation of symbols for main parts of the drawings

1: video memory 2: video display controller

3: special attribute shaped ROM 4: special attribute decoder

5: OR gate

The present invention synthesizes and displays character shapes and attribute shapes by character code (CODE) and attribute code values while providing special attribute shapes other than flickering, reversed phase, brightness, and underlining, which are standard attribute functions of alphanumeric image mode. The present invention relates to a device and a method for synthesizing a child image using character attribute codes.

It can be used in an emulator that can connect a personal computer to various host computers and operate it as a terminal, and it is convenient to input, modify and inquire various data in each field by configuring the host computer screen. Method and device.

In the prior art, since there was no hardware provision for the shape image synthesis, a software process was necessary.

Because of this, the software for various emulator equipments must have all the special character shapes needed, which causes a lot of difficulty in program production and delay in execution speed.

The present invention has been made in view of the above circumstances, and further includes a memory in which special attribute shapes are stored as data in addition to a memory in which a conventional general standard shape image is stored, and the special shape image data is addressed by a conventional attribute code. SUMMARY OF THE INVENTION An object of the present invention is to provide a device for synthesizing a magnetic image and a method thereof capable of synthesizing a magnetic image in a relatively simple manner.

According to the present invention for realizing the above object, an apparatus for synthesizing an image includes a character code corresponding to a key input and a first video memory and a first video memory for storing standard character image data and attribute codes of the character. A character-shaped output device having a controller for outputting a corresponding character as an image based on stored data, comprising: a second video memory for storing specific character image data and an output from the first memory under control of the controller; An image synthesizer which synthesizes and operates a decoder that accesses special image data stored in the second video memory according to an attribute code, and standard image data output from the first memory and child image data output from the second memory. Including means It features.

According to the present invention having the above configuration, it is possible to synthesize a special shape image in addition to the shape image provided in the related art at a relatively simple and fast processing speed.

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

FIG. 1 is a block diagram illustrating a main part of a magnetic image synthesizing apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a text area of plane 0 and an attribute area of a corresponding character corresponding to a user's key input. A video memory for dividing and storing each of plane 1, plane 2, which is a font area, and plane 3, an unused area, and 2 is a video display that outputs a corresponding character as an image based on data stored in each area of the video memory. The controller 3 is a special attribute type ROM which stores a specific shape separately input and stored at the time of manufacture of the device in addition to the standard attribute shape which is commonly used, and 4 is output from the video memory 1 under the control of the controller 2. Stored in the special attribute shape ROM (3) according to the attribute code signal being A decoder 5 for accessing the special shape image, 5, is an OR gate that synthesizes the general shape image output from the video memory 1 and the special shape image output from the special attribute shape ROM 3.

Next, the operation of the device having the above configuration will be described.

For example, when the user selects and inputs the letter 'A' by pressing a predetermined key installed on the keyboard, the controller 2 recognizes the letter A by outputting a predetermined control signal to the plane 0 in the memory 1 and the plane 2. In Figure 1, the image of the letter A is output, and in Inplane 1, the attribute codes such as reverse phase, back brightness, and blinking are selected and output according to the user's selection.

At this time, as shown in FIG. 3, four bits (0,1,4,5) which are not generally used among the 8-bit attribute codes output from plane 1 in the video memory 1 are assigned to the special shape image output. Bits 2, 3, and 7 of the input attribute's 8-bit inputs cause the standard attributes (blink, invert, back brightness, underline) to enter the video display controller through the buffer. Bits 0, 1, 4, and 5 allow the special attribute type ROM to be addressed through the buffer so that the special attribute type can be output.

That is, the attribute code decoder logic unit connects the data bits 0, 1, 4, and 5 of the plane 1 set in the video memory 1 with the address stage of the ROM to address the special attribute type ROM 3, Data bits 2, 3, and 7 of the plane 1 set in the video memory 1 are rearranged to 8 bits so as to represent a standard attribute, and output to the video display controller 2.

On the other hand, the shape image output from the plane 2 and the special attribute shape ROM 3 in the video memory 1 is, for example, 8 × 16 fonts, by outputting a signal of 0 or 1 to the corresponding dot out of a total of 128 dots. It means a dot signal forming a?, So when OR operation is performed on the normal shape image output from the plane 2 in the video memory 1 and the shape image output from the special attribute shape ROM 3, the two shape image is obtained. Overlapping composite shapes will be output.

In the special attribute ROM 3, a general character image and a special character image to be synthesized are programmed and stored, so that the special image and video memory 1 output from the special attribute ROM 3 are displayed on the screen. The general shape image output from plane 2 of) is synthesized in the OR gate 5 and displayed on the monitor.

FIG. 2 is a schematic diagram of an attribute code decoder logic unit. FIG. 2 shows a special attribute decoder in detail. FIG. 3 shows an assignment of attribute 8 bits and an address value of a special attribute shape. An embodiment is shown and in particular the following diagram of the bitmap shows an embodiment of a display image in which characters (8 bits), attributes (8 bits) and attributes (8 bits) are combined.

Therefore, according to the above embodiment, up to 16 special attribute shapes other than the standard attributes used in general personal computers can be used in combination with general character shapes, and thus can be usefully used in various application software.

The present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention.

As described above, according to the present invention, in addition to a memory in which a conventional general standard image is stored, a memory having a special attribute shape image as data is additionally provided, and the special shape image data is addressed with a conventional attribute code to generate a general shape image. By synthesizing with, it is possible to realize a magnetic image synthesizing apparatus and a method for synthesizing a magnetic image relatively simply.

Claims (2)

A controller that outputs the character as an image based on the character code corresponding to the key input and the data stored in the first video memory of the first video memory storing the standard shape image data and attribute code of the character. In the character-shaped output device having a second shape, the second video memory for storing a specific shape image data, and a special shape stored in the second video memory according to the attribute code output from the first memory under the control of the controller And a decoder for accessing the image data, and an image synthesizing means for synthesizing the standard shape image data output from the first memory and the shape image data output from the second memory. Synthesis device. The attribute code output from video memory plane 1 is input to the special attribute decoder through the data line, and some of the input attribute code is input to the video display controller through the buffer, and some of the attribute code is input through the buffer to the special attribute type ROM. And an ordinary character image inputted to a special attribute type ROM to output a special character image output from the special attribute type ROM and an ordinary coded image output from the plane 2 of the video memory at the OR gate.