JPH03129393A - Multi-window display system - Google Patents

Abstract

PURPOSE:To use a desired color to be displayed without considering other application programs by storing color codes and performing color conversion when image data are transferred from an image memory to a display memory. CONSTITUTION:When an image which is stored in an area secured at an image memory part 4 is displayed on a display device 7, a window control part 2 which operates according to the information of the application program stores a storage means 4a with the position and size of the area where the image is stored and the color code of the image and those are specified to an image data conversion and transfer part 6, which is actuated. The image data conversion and transfer part 6 reads image data 3 on the image out, reads the color code corresponding to the image data 3 out from a storage means 4a, and transfers the image data 3 and color code to a display memory part 5 to display the image on the display device 7 in color, so that display colors can be prevented from changing by windows even when a color multi-window display is made.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-window displayed on a color display device of an information processing device, for example, and particularly to color display of the multi-window.

[Prior Art] In the multi-window display of a conventional information processing device, for example, as shown in the block diagram of FIG. Specify the number of pixels in the image and request to reserve image memory of that size. Window management section (12)
Allocates an image memory of the requested size in the image memory unit (13>) and stores the size and location of the image memory in a window and a management table (not shown).

Further, the application program (11) generates an image to be displayed in the image memory secured on the image memory unit (13), and stores the image memory in the display memory unit (13).
15), the window management unit (12)
In addition to specifying the location of the image memory on the display memory section (15) and the size to be displayed, the display is requested.
) starts the image data transfer unit (14) according to the instruction information from the application program (11>) and transfers the image data in the image memory from the image memory unit (13) to the display memory unit (15).Display memory unit (15)
The image data transferred to is stored in a specified position in a specified size and displayed in color on a color display device (17) via a color palette (1B).

The window management unit (12) receives and operates the requests from the plurality of application programs (11), thereby creating multi-windows on the display memory unit (15) and displaying them on the color display device (17). ) shown above.

Note that the display memory section (15) usually has a one-to-one correspondence with the screen displayed on the color display device t(1γ),
One pixel is made up of multiple bits to represent a color code. Furthermore, the image data on the display memory section (15) is converted into luminance information of each color of R (red), G (green) and B (blue) by the color palette (1B>), and is displayed on the color display device (17>). Displayed in color. Color palette (
1B) has a structure that allows writing from the application program (11).

[Problems to be Solved by the Invention] However, in the multi-window display method described above, the application program (11) rewrites the color palette (1B) to display windows created and managed by other application programs (11). There was a problem that the display color changed.

The present invention has been made in order to solve such problems.It is an object of the present invention to obtain a multi-window display method in which the display color of each window does not change even if there are multiple color windows displayed based on the request of an application program. With the goal.

[Means for Solving the Problems] The multi-window display method according to the present invention includes a window management unit that sequentially operates based on information from a plurality of application programs, and an area where images are stored in an area secured by the window management unit. a display memory section in which image data of the image to be displayed on the display device is stored; and a size and position of the secured area of the image memory section based on instructions from the window management section. storage means for storing information on the area and further storing a color code corresponding to the image stored in the area; and a storage means for reading image data from the area of the image memory section and a color code corresponding to the image data. an image data converter for reading the image data and the color code from the color conversion code section of the storage means and transferring the image data and the color code to the display memory section;
It is equipped with a transfer section.

[Operation] In the present invention, when displaying an image stored by an application program in an area secured in the image memory unit on a display device, the image data conversion/transfer unit reads the image data of the image and The image is displayed in color on the display device by reading the color code corresponding to the image data from the storage means and transferring the image data and color code to the display memory section. this is,
The window management unit that operates based on the information of the application program stores the location and size of the area where the image is stored and the color code of the image in the storage means, specifies this to the image data conversion/transfer unit, and starts it. This is to make it happen.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing details of a window management table, and FIG. 3 is a diagram showing details of an image data conversion/transfer section.

・In the figure, (1) is an application program,
(2) is a window management unit that is called by the application program (1) and manages the image memory unit (4) and display memory unit (5), which will be described later, based on the request.
A multi-window is displayed on the color display device (7).

(3) is a storage means (hereinafter referred to as a "window management table") in which information from the window management section (2) is stored, such as the size of the image memory (4a) secured in the window management section (2), etc. The location is memorized, and
The color code of the image memory (4a) is stored in the corresponding color conversion code section.

(4> is an image memory section in which images are stored in the image memory (4a) secured in the window management section (2), and (5) corresponds one-to-one with the color display device (7), and its color display This is a display memory unit that stores an image to be displayed on the device (7>) in a size specified by the application program (1) and at a specified position.

(6) is an image data conversion/transfer unit that reads the image data specified by the window management unit (2) from the image memory unit (4), and also reads the color conversion code of the image data specified by the window management unit (2). Reads the color code from the memory section and displays the image data and color code.
Transfer to 5).

Next, the operation will be explained based on FIGS. 1 to 3. First, when the application program (1) requests the window management unit (2>) for an image memory (4a) of the required size (number of horizontal pixels x number of vertical pixels x number of colors per pixel), The window management unit (2) supplies the image memory unit (4a) with the requested size to the image memory unit (4).
At the same time, information on the position and size (number of horizontal pixels x number of vertical pixels x number of colors per pixel) of the image memory (4a) is stored in the window management table (3).

Further, when the application program (1) notifies the window management unit (2) of the color code corresponding to the requested image memory (4a), the window management unit (2)
is stored in the color conversion code section of the window management table (3>) corresponding to the color code.

Furthermore, the application program CL> creates an image to be displayed in the image memory (4a) secured on the image memory unit (4), and stores the image in the display memory unit (5).
), the window management unit (2) specifies the location of the image memory (4a), and also specifies the location and display size in the display memory unit (5) and requests display.Display The window management section that requested (2)
The image data conversion/transfer unit (
6), and also specify the location on the display memory section (5) and the size to be displayed in the image data conversion/transfer section (8).
Specify and start it.

The image data conversion/transfer section (6) includes a window management section (
Based on the specification in 2), one pixel or multiple pixels worth of image data is read from the image memory (4a), and the read one pixel or multiple pixels worth of image data is converted into a color code from the specified color conversion code section. is read and the image data and color code are transferred to the display memory section (5).

The image data transferred to the display memory section (5) is written in a designated position, and this operation is repeated for the designated size. The data written to the display memory section (5) is displayed on the color display device (7>).The window management section (2) receives and accepts the above-mentioned requests from the plurality of application programs (1>). By operating, a multi-window is displayed on the color display device (7).

[Effects of the Invention] As described above, according to the present invention, color conversion is performed when image data is transferred from the image memory to the display memory, so the application program can display the data without being aware of other applications. The effect is that you can use any color you want.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing details of a window management table, FIG. 3 is a diagram showing details of an image data conversion/transfer section, and FIG. 4 is a diagram showing a conventional FIG. 1 is a block diagram showing an example of the configuration of an information processing device. In the figure, (1) is an application program, (
2) is a window management section, (3) is a window management table, <4) is an image memory section, (5) is a display memory section,
([1] is an image data conversion/transfer unit, and (7>) is a color display device.

Claims (1)

[Scope of Claims] A window management unit that sequentially operates based on information from a plurality of application programs; an image memory unit that stores images in an area secured by the window management unit; and an image that is displayed on a display device. a display memory section in which image data of the image is stored; information on the size and position of a secured area of the image memory section is stored based on instructions from the window management section; a storage means for storing a color code corresponding to an image; and a storage means for reading image data from the area of the image memory section and reading a color code corresponding to the image data from a color conversion code section of the storage means; A multi-window display system comprising: an image data conversion/transfer section that transfers data and color codes to the display memory section.