JPS6159484A - Segment control system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device that displays figures and the like using a rask scanning method, and particularly to a control method for managing figure data in segments.

Generally a graphic data file (generally memory) on a display device
If you have a graphic, it becomes possible to perform local processing on the display device, such as enlarging, reducing, rotating, indexing, and redisplaying the graphic. When a graphic data file is provided, the graphic data can be subdivided and defined into units that can be enlarged, reduced, rotated, displayed/hidden, etc., and these units are called segments.

If the display device has a graphic data file and segments are defined in this graphic data file, it is possible to locally process the graphic at the segment level as described above, but this makes operations from the host device complicated. It is necessary that the amount of data transferred does not increase.

[Conventional technology]

In conventional display devices, when a segment is defined in a graphic data file, adding, deleting, or inserting a partial figure to that segment becomes complicated.
When adding this, define a new segment, or if you do not want to increase the number of segments, delete the segment that corresponds to the shape to which you want to add a vector, and define a segment that corresponds to the new shape to which one vector has been added. The only way to do this was to send it from the host device.

Furthermore, when deleting part of a segment, it was necessary to delete the relevant segment, define the part that will not be deleted again as a new segment, and send it out.

[Problem that the invention seeks to solve]

In any case, when partially defining a new segment, segment definition data such as display position and enlargement ratio, attribute data and scale data that specify display color, line type, etc. are required, and data from the host device is required. There is a problem that the number of transfers increases and the first graphic data operation becomes VG(1,).

[Means for solving problems]

The above-mentioned problem Ij also has a memory, a hector generating means, and an image memory for storing the drawing generated by the hector generating means (6iI). In a display device that performs segment control by defining segments in the memory, Means for storing figure attribute information created by the hector generating means in the memory is provided, and when figure data to be changed of segment +-+tq is given, the part that needs to be changed is stored in the image memory based on the figure attribute information. This problem is solved by the segment control method according to the present invention, in which the drawing result generated by the vector generating means is written in the segment control method according to the present invention.

[Effect]

That is, it is possible to read the graphic attribute information from a register storing the graphic attribute information used in the hector generation circuit into the memory and hold it, and also to write this graphic attribute information from the memory to the register. By making it possible to instruct whether or not to write the drawing generated by the generation circuit to the image memory, vectors are generated again only for the graphic data whose segment is changed and the graphic data connected to it, and the image In this method, the graphic data is erased from the memory, or after the data is erased, a changed part is filled in, an additional part is written, or these data are combined.

〔Example〕

FIG. 1 is a block diagram of a circuit showing an embodiment of the present invention.

The case of defining and displaying a segment corresponding to a new 41' figure will be explained.

Graphic data including definition data, attribute data, and vector data is sent from the second-order device via the interface control circuit 3 as described above. Processor 1 stores this graphic data in memory 2, performs necessary conversion, and then sets the result in hector generation circuit 4.

The hector output circuit 4 draws vectors or characters, and if the instruction of the mode register 6 (to be described later) instructs writing, the drawing can be written into the image memory 7, and if the instruction to write H1 is not specified, the drawing is drawn. Perform only actions. At this time, graphic attribute information such as the current address point, color, line type, character size, etc. is held in the register 5. This figure attribute information is Brocesoza 1
is held in the memory 2 as figure attribute information Δ.

The mode register 6 is a register for instructing whether or not the characters, characters, etc. generated by the vector generating circuit 4 are to be written into the image memory 7, and the conditions thereof are set by the processor 1. Command a is defined as an instruction to write to the image memory 7, and command b is an instruction not to write to the image memory 7.

The processor 1 independently performs local processing of segments according to instructions from an operator, regardless of the host device. In this case, the addition of partial figures that is frequently performed from the host device is processed at high speed, and the Bekulele generation time rl? In order to cope with the situation where the information in I4 changes, the graphic attribute information in register 5 changes accordingly, and the graphic attribute information before local processing is not saved, graphic attribute information A is held for each segment as described above.

Next, the case of changing the contents of a certain figure will be explained.

FIG. 2 is a diagram illustrating the relationship between segment graphic data and display graphics, and FIG. 3 is a diagram illustrating an example of display graphics when the display contents of FIG. 2 are changed.

FIG. 2 (·) shows a segment 9 defined in the graphic data file 8. Figure 2 (h+ is segnon 1 of (a)
- In the example when displaying 〇, figure data I in (a)
This is the data that displays the outline I of the house (Kayama), and the graphic data ■
Suppose that - double window I+, graphic data ■1 or double window ■ are displayed.

In this case, figure data n is in figure data ■, figure data H is
Figures -) - One evening ■ are joining people.

For example, except for the - double window ■ in [h] that displays the graphic data I of the second figure t, i+, for example, the third centroid, the double double-like I"A (designated as the graphic data ■), ．Explain the case when you want to do it.

'' Only the address of the segment to be changed, the start address and data length of the graphic data H of the changed part, and the graphic data of the changed part are sent from the three-position device via the ink face control circuit 3. The selector 1 selects the target segment. Then, (2) the heckle generation circuit 4 is brought into an initialized state;

■Set command 1) to mode register 6.

(2) The graphic data generating circuit 4 is caused to perform a drawing operation based on the graphic data (2) of the segment 9 of the graphic data file 8 stored in the memory 2, and the graphic attribute information 11UB at that time is stored in the register 5.

(2) The figure attribute information IIB stored in the register 5 is read out by the operation (2) above and held in the memory 2.

(2) Input command a to mode register 6.

■According to the graphic attribute information B held in the memory 2 in the above ■, the graphic data ■ and
The image is drawn using the value of , and written into the image memory 7. By this operation, the graphic data (■) and (2) can be erased. The reason why the graphic data ■ is deleted is because the display position of the graphic data ■ may change due to the deletion and addition of the graphic data ■.

(2) The graphic data (2) is deleted from segment 9 of the graphic data file 8 stored in the area of the memory 2, and the graphic data (2) of the door sent from the host device via the interface segment circuit 3 is inserted.

■The figure attribute information B is transferred to the hector generation circuit 4, and the drawing operation of the figure data ■ is performed following the figure data ■.
It is written into the image memory 7.

(2) Read the graphic attribute information from the register 5, update the graphic attribute information stored in the memory 2, and end the process.

FIG. 4 is a diagram illustrating an example of adding graphic data to FIG. 2.

The processor 1 inputs, for example, the fourth
When additionally displaying the tree shape data shown in figure (b),
As shown in FIG. 4 (al), the graphic data (2) sent from the host device via the ink face control circuit 3 is stored in the area of the graphic data file 8 next to segment 9 to form segment 9''.

(2) Set the graphic attribute information 113A stored in the memory 2 in the vector generation circuit 4;

■Sent command A to mode register 6.

■As shown in FIG. 4(b), the graphic data V is additionally drawn from the address after the graphic data I, ■, and ■ are depicted, and is written into the image memory 7. Let it happen.

(2) Read the graphic attribute information from the register 5, update the graphic attribute information stored in the memory 2, and end the process.

Although the above explanation has been made for the case where there is one segment 9 in the graphic data file 8, it is clear that even if a plurality of segments 9 exist, the same processing can be performed.

〔Effect of the invention〕

As explained above, according to the present invention, the amount of data transferred from the three-way device is minimized, and display graphics can be easily deleted, inserted, and added.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a circuit showing an embodiment of the present invention, Fig. 2 is a diagram explaining the relationship between segment graphic data and display figures, and Fig. 3 shows a case where the display contents of Fig. 2 are changed. FIG. 4 is a diagram illustrating an example of adding graphic data to FIG. 2. In the figure, 1 is a processor, 2 is a memory, and 3 is an interface.
4 is a hector output register, 6 is a storage register, and 7 is an image memory. □□”

Claims (1)

[Claims] A display device comprising a memory, a vector generating means, and an image memory for storing a drawing generated by the vector generating means, and performing segment control by defining segments in the memory, a graphic attribute created by the vector generating means. Means for storing information in the memory is provided, and when given graphic data to be changed within a segment, the vector generating means generates a drawing result generated in a portion of the image memory that requires modification based on the graphic attribute information. A segment control method characterized by writing.