JPH06301371A - Plotting process method - Google Patents

Abstract

PURPOSE:To improve display performance with clear letter-forms on one time screen, etc., and to decrease a memory capacity while the quality of the characters is not good at the time of the magnification or reduction of the screen by using raster font data with the ordinary one-time screen and using vector font data with the magnified or reduced screen. CONSTITUTION:A central processor 1 emits the raster font data from a raster font data storage means 5 and transfers the data to a graphic processor 2 in the case of the character display with the one-time screen when there is a request for the character display. The graphic processor 2 displays the character by this raster font data on a display device 3. Vector font data of a size meeting the magnification or reduction rate is emitted from a vector font data memory means 4 and the characters by this vector font data is executed when there is a request for the character display which is not a one-time screen (when there is the magnification or reduction of the screen).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing processing method for drawing information such as characters on a screen of a display device in a supervisory control system for monitoring and controlling a plant such as a power generation plant, and more particularly, to a display performance depending on a screen magnification. The present invention relates to a drawing processing method capable of changing.

[0002]

2. Description of the Related Art FIG. 10 is a block diagram showing a schematic configuration of a supervisory control system according to Conventional Example 1. In FIG. 10, 1 is a central processing unit that performs data processing for monitoring and controlling the plant, 3 is a display device that displays information necessary for monitoring and controlling the plant on a screen, and 2 is a display device 3. The graphic processor 4 which performs processing for displaying information on the screen has information on points corresponding to some of the pixels on the screen of the display device 3 for drawing various desired information, and those points It is a vector font data storage means that has distance information indicating a relative distance between them and stores vector font data regarding a font. In the conventional example 1 having such a configuration, even when the screen is enlarged or reduced, the vector font data used for the 1 × screen is used. In other words, vector font data that can be drawn on any screen size is used.

The operation of the prior art example 1 will be described below with reference to the flow chart of FIG. When there is a character display request in step S1, the central processing unit 1 determines in step S2 whether or not there is a screen enlargement or reduction operation, and if there is no enlargement or reduction operation, in step S3 the vector font data storage means. 4 issues vector font data of the current size and passes it to the graphic processor 2. In step S5, the graphic processor 2 displays a character on the display device 3 according to the vector font data. If there is an enlargement or reduction operation in step S2, vector font data of a size matching the enlargement or reduction ratio is issued in step S4, and characters are displayed according to the vector font data in step S5. .

FIG. 12 is a block diagram showing a schematic configuration of a supervisory control system according to the second conventional example. In FIG.
Components corresponding to those shown in FIG. 10 are designated by the same reference numerals, and their description will be omitted. In FIG. 12, reference numeral 5 is a raster font data storage means for storing raster font data relating to fonts corresponding to the pixels on the screen of the display device 3 for drawing various desired information. In the conventional example 2 as described above, the range in which the screen is enlarged or reduced is restricted and only the raster font data corresponding to the enlargement or reduction ratio is supported.

Next, the operation of the second conventional example will be described with reference to the flowchart of FIG. For example, in the enlargement or reduction operation, there is a restriction of 1/2 times, 1 times, 2 times,
When there is a character display request in step S11, the central processing unit 1 determines in step S12 whether or not there is a screen enlargement or reduction operation, and if there is no enlargement or reduction operation, the raster font data storage means in step S13. The raster font data of the current size is issued from 5 and passed to the graphic processor 2. In step S15, the graphic processor 2 displays characters on the display device 3 according to the raster font data. If there is an enlargement or reduction operation (for example, 1/2 times, 1 times, 2 times) in step S12, raster font data of the respective size is issued in step S14, and in step S15 the Characters are displayed using raster font data.

[0006]

As described above, the conventional example 1 is as follows.
The drawing processing method according to (1) has a problem in that, regardless of whether the screen is enlarged or reduced, for example, vector font data, which is difficult to see in a typeface, must be used even for the normally used 1 × screen. Further, the drawing processing method according to the conventional example 2 has a problem that the screen can only be enlarged or reduced at a limited magnification. Further, if the restriction range is increased, the number of raster font data to be supported increases, and there is a problem that the capacity of the memory as the raster font data storage means for storing those raster font data must be increased.

The present invention has been made in order to solve the above-mentioned problems, and in a 1 × screen or the like which is normally used, the font is beautiful and the raster font data having good display performance is used. An object of the present invention is to obtain a drawing processing method capable of drawing using vector font data capable of enlarging or reducing a character, since the quality of the font is not good at the time of enlarging or reducing the screen but the memory capacity is small.

[0008]

According to a first aspect of the present invention, there is provided raster font data storage means 5 for storing raster font data relating to fonts corresponding to pixels on a screen of a display device 3 for drawing various desired information. , Has vector information of points corresponding to some of the pixels on the screen in order to draw desired various information, and has distance information showing the relative distance between these points, and stores vector font data related to fonts The vector font data storage means 4 is provided to draw desired information on the screen by using the raster font data in the normal 1 × screen, and by using the vector font data in the enlarged or reduced screen. The information is switched so as to be drawn on the screen.

The second aspect of the present invention stores raster font data storage means 5 for storing raster font data relating to fonts corresponding to pixels on the screen of the display device 3 for drawing various desired information, and various desired information. Vector font data storage means for drawing and having information on points corresponding to some of the pixels on the screen and having distance information indicating a relative distance between these points and storing vector font data relating to a font. 4 and the normal 1x screen and 2
The desired information is drawn on the screen by using the raster font data in the double screen and the quad screen, and the desired information is displayed by using the vector font data in the other enlarged or reduced screens. This is to switch to draw on the top.

In a third aspect of the present invention, raster font data storage means 5 corresponding to pixels on the screen of the display device 3 for drawing desired various information and storing raster font data relating to a font and various desired information are displayed. Vector font data storage means for drawing and having information on points corresponding to some of the pixels on the screen and having distance information indicating a relative distance between these points and storing vector font data relating to a font. 4 is further provided, and a raster font designation table 6 which shows the relationship between the predetermined magnification and the raster font size and which allows the user to specify one of the predetermined magnifications. The raster font data from the raster font data storage means 5 designated and read by the raster font designation table 6 Draw the desired information on the screen using the, the desired information using the vector font data in which switching to draw on the screen in the enlarged or reduced screen of the other factor.

[0011]

In the first aspect of the invention, the raster font data of the raster font data storage means 5 is used in the normal 1 × screen, and desired information is displayed on the screen of the display device 3. Further, on the enlarged or reduced screen, the vector font data of the vector font data storage means 4 is used, and desired information is displayed on the screen of the display device 3.

In the second aspect of the invention, the raster font data of the raster font data storage means 5 is used in the normal 1 × screen, 2 × screen and 4 × screen, and desired information is displayed on the screen of the display device 3. To be done. On the other hand, the vector font data of the vector font data storage means 4 is used on the other screens for enlarging or reducing the magnification, and desired information is displayed on the screen of the display device 3.

In the third aspect of the invention, the raster font data storage means 5 designated and read by the raster font designation table 6 is used for a screen of a magnification which is usually used.
Using the raster font data from, the desired information is drawn on the screen of the display device 3. In addition, the vector font data of the vector font data storage means 5 is used on the screen for enlarging or reducing the magnification other than that, and desired information is drawn on the screen of the display device 3.

[0014]

【Example】

Example 1 (corresponding to claim 1). 1 is a block diagram showing a schematic configuration of a supervisory control system according to a first embodiment of the present invention. In the first embodiment, the central processing unit 1, the graphic processor 2, the display device 3
In addition to the raster font data storage means 5 that stores raster font data relating to fonts corresponding to the pixels on the screen of the display device 3, and the points corresponding to some of the pixels on the screen of the display device 3. And a vector font data storage means 4 which stores information and has distance information indicating a relative distance between these points and stores vector font data relating to a font.

FIG. 2 is a view showing a raster font of, for example, 16 dots × 16 dots based on the above raster font data. This 16 dot × 16 dot raster font is stored in the raster font data storage means 5 as a dot image. For this reason, it ’s as beautiful as the Mincho style,
Further, since it is an image that is copied to the screen when displayed on the screen, image processing can be performed at high speed, but as shown in FIG. 2, it also has a blank portion as an image. For example, if 1 dot is set to 1 bit, 16 × 1 screen
16 = 256 bits are required, and therefore the raster font data storage means 5 needs to have a large memory capacity.

FIG. 3 is a diagram showing a vector font of, for example, 16 dots × 16 dots based on the above vector font data. This vector font data has point information indicated by a circle in FIG. 3 and distance information indicating a relative distance between points. Since the vector font based on this vector font data is displayed by calculating the relative distance according to the specified size, the image processing speed is slower than the raster font, but
The amount of data is small, and since the points are connected by straight lines, it is difficult to see with angular fonts, but any size is possible.

Next, the operation of the drawing processing method according to the first embodiment will be described with reference to the flowchart of FIG. When there is a character display request in step S21, the central processing unit 1
In step S22, it is determined whether or not the screen is a 1 × screen. In the case of character display of the 1 × screen, raster font data is issued from the raster font data storage means 5 and passed to the graphic processor 2 in step S23. Step S25
Then, the graphic processor 2 displays a character on the display device 3 according to the raster font data. If the character display request is not a 1 × screen (when the screen is enlarged or reduced), the vector font data of the size corresponding to the enlargement or reduction ratio is issued from the vector font data storage means 4 in step S24, and the step is executed. In S25, the characters are displayed by the vector font data.

Embodiment 2 (corresponding to claim 2). The schematic configuration of the supervisory control system according to the second embodiment is shown in FIG.
Is the same as. The drawing processing method according to the second embodiment supports raster fonts corresponding to respective magnifications when the screen is 1, 2, or 4 times, and automatically issues vector fonts in other magnifications. It is something that is done.

Next, the operation of the second embodiment will be described with reference to the flowchart of FIG. The central processing unit 1 is step S
If there is a character display request in 31, it is determined in step S32 whether the screen magnification is 1 time, 2 times, or 4 times. If so, in step S33 raster font data of a size matching the magnification is selected. Raster font data storage means 5
Issued to the graphic processor 2. Then, in step S35, the graphic processor 2 displays the characters by the raster font data on the display device 3. In the case of a magnification other than 1 ×, 2 ×, and 4 ×, step S3
4. Issue vector font data of a size suitable for the enlargement or reduction ratio in 4, from the vector font data storage means 4,
In step S35, characters are displayed by the vector font data.

Embodiment 3 (corresponding to claim 3). FIG. 6 is a block diagram showing a schematic configuration of a supervisory control system according to the third embodiment, which is obtained by adding a raster font designation table 6 to the configuration of FIG. FIG. 7 shows an example of the raster font designation table 6. In the case of this raster font specification table 6, 8 × when the screen magnification is ½
Issue raster font data of 8 dot size, and
Raster font data with a size of 16x16 dots is issued from 2x to 1.5x, raster font data with a size of 32x32 dots is issued when doubled, and from 3.5x
This is a table meaning that up to 4 times the size of a raster font of 64 × 64 dots is issued. The raster font designation table 6 can be freely set by the user. For example, this table 6 is shown in FIG.
The magnification and raster font size can be set as shown in. In this case, when the screen is enlarged to, for example, three times the size, since it is not defined in the table 6, vector font data of, for example, 48 dots × 48 dots is used.

Next, the operation of the third embodiment will be described with reference to the flowchart of FIG. The central processing unit 1 is step S
If there is a character display request in 41, it is determined in step S42 whether or not there is a screen enlargement or reduction operation, and if so, whether the enlargement or reduction ratio is registered in the raster font designation table 6 in step S43. The determination process of is performed. If registered, the raster font data of the size registered in the raster font designation table 6 is issued from the raster font data storage means 5 and passed to the graphic processor 2 in step S44. The graphic processor 2 displays the characters by the raster font data on the display device 3 in step S47. If there is no screen enlargement or reduction operation in step S42, a font of the current font type and size is issued in step S45, and characters are displayed in step S47. Raster font specification table 6 in step S43
If the enlargement or reduction ratio is not registered in step S46, vector font data having a size suitable for the enlargement or reduction ratio is issued in step S46, and characters are displayed according to the vector font data in step S47.

[0022]

As described above, according to the first invention, the desired information is drawn on the screen by using the raster font data in the normal 1 × screen, and the vector font data is drawn in the enlarged or reduced screen. Since the desired information is switched to be drawn on the screen by using it, the font is beautiful and the display performance is good on the 1x screen that is usually used, and the raster font data is used only for the 1x screen. The memory capacity of the data storage means can be small, while the memory capacity of the vector font data storage means can be small, and therefore, the effect that the overall memory capacity can be reduced can be obtained.

According to the second aspect of the invention, in normal 1 ×, 2 × and 4 × screens, raster font data is used to draw desired information on the screen, and the other information is drawn. On the enlarged or reduced screen, the desired information is drawn on the screen using vector font data, so on the screen of commonly used magnification, the font is clean and the display performance is good, and the raster font data The memory capacity of the storage means is smaller than that in the case of drawing a screen of all magnifications, while the memory capacity of the vector font data storage means is also small, and therefore, the effect that the overall memory capacity can be reduced can be obtained. .

Further, according to the third aspect of the invention, in the case of the screen of the magnification which is usually used, desired information is obtained by using the raster font data from the raster font data storage means designated and read by the raster font designation table. Is drawn on the screen, and the desired information is drawn on the screen by using vector font data on the screens that are enlarged or reduced at other magnifications, so the user can change the contents of the raster font specification table. , The effect that it can be used according to the purpose can be obtained, and the same effect as the above can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a supervisory control system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of a raster font.

FIG. 3 is a diagram showing an example of a vector font.

FIG. 4 is a flowchart showing the operation of the drawing processing method according to the first embodiment.

FIG. 5 is a flowchart showing an operation of a drawing processing method according to a second embodiment of the present invention.

FIG. 6 is a block diagram showing a schematic configuration of a supervisory control system according to a third embodiment of the present invention.

FIG. 7 is a diagram showing the contents of a raster font designation table in the third embodiment.

FIG. 8 is a diagram showing the contents of a raster font designation table in the third embodiment.

FIG. 9 is a flowchart showing the operation of the drawing processing method according to the third embodiment.

FIG. 10 is a block diagram showing a schematic configuration of a supervisory control system according to Conventional Example 1.

FIG. 11 is a flowchart showing an operation of the drawing processing method according to the conventional example 1.

FIG. 12 is a block diagram showing a schematic configuration of a supervisory control system according to Conventional Example 2.

FIG. 13 is a flowchart showing the operation of the drawing processing method according to the second conventional example.

[Explanation of symbols]

 1 central processing unit 2 graphic processor 3 display device 4 vector font data storage means 5 raster font data storage means 6 raster font specification table

Claims (3)

[Claims] 1. In a supervisory control system for displaying information on a screen of a display device to monitor and control a plant or the like, raster font data relating to fonts corresponding to pixels on the screen for drawing various desired information. And raster font data storing means for storing various information, and distance information indicating the relative distance between the points, which has information on points corresponding to some of the pixels on the screen for drawing various desired information. And vector font data storage means for storing vector font data relating to fonts are provided, and in a normal 1 × screen, desired information is drawn on the screen using the raster font data, and in an enlarged or reduced screen. Drawing processing method characterized by switching to draw desired information on the screen using the vector font data . 2. In a supervisory control system for displaying information on a screen of a display device to monitor and control a plant or the like, raster font data relating to fonts corresponding to pixels on the screen for drawing various desired information. And raster font data storing means for storing various information, and distance information indicating the relative distance between the points, which has information on points corresponding to some of the pixels on the screen for drawing various desired information. And vector font data storage means for storing vector font data relating to fonts are provided, and desired information is displayed on the screen by using the raster font data in a normal 1 × screen, 2 × screen, 4 × screen, etc. Draw, and on the other screens of enlargement or reduction of magnification, draw the desired information on the screen using the vector font data. A drawing processing method characterized by switching. 3. In a supervisory control system for displaying information on a screen of a display device to monitor and control a plant or the like, raster font data relating to fonts corresponding to pixels on the screen for drawing various desired information. And raster font data storing means for storing various information, and distance information indicating the relative distance between the points, which has information on points corresponding to some of the pixels on the screen for drawing various desired information. And a vector font data storage means for storing vector font data relating to a font, and further, a raster font specification table which shows a relationship between a predetermined scale factor and a raster font size and which allows a user to designate one of the predetermined scale factors. The raster font specified and read from the table above is provided on the screen of the magnification that is usually used. The desired information is drawn on the screen by using the raster font data from the data storage means, and the desired information is drawn on the screen by using the vector font data in the enlargement or reduction screen of other magnifications. A drawing processing method characterized by switching as follows.