CN113535104B - Multi-screen display switching method and device based on virtual machine - Google Patents
Multi-screen display switching method and device based on virtual machine Download PDFInfo
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- CN113535104B CN113535104B CN202110600660.3A CN202110600660A CN113535104B CN 113535104 B CN113535104 B CN 113535104B CN 202110600660 A CN202110600660 A CN 202110600660A CN 113535104 B CN113535104 B CN 113535104B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/04842—Selection of displayed objects or displayed text elements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
Abstract
The invention provides a multi-screen display switching method and device based on a virtual machine, wherein the method comprises the following steps: step 1, receiving a screen changing display instruction, and determining an initiating display screen and a target display screen; step 2, determining a corresponding client window after screen changing display of the initiating display screen and the target display screen; step 3, determining a second matching relationship according to the first matching relationship, wherein the first matching relationship is a matching relationship between a client window and a virtual touch device channel, and the second matching relationship is a target virtual touch device channel for mounting the virtual touch device corresponding to the initiating display screen and the target display screen; step 4, re-mounting virtual touch equipment corresponding to the initiating display screen and the target display screen according to the second matching relation; and step 5, the received touch data is sent to the corresponding client window through the corresponding virtual touch equipment channel. The invention realizes the user interface after the touch data channel is automatically matched with the screen changing display.
Description
Technical Field
The present invention relates to the field of virtual machines, and in particular, to a method and an apparatus for switching multi-screen display based on a virtual machine.
Background
In some application scenarios (for example, intelligent cabin products), a plurality of display screens are generally provided, information sharing such as song sharing and video sharing can be realized among different display screens, but in the prior art, a user cannot exchange user interfaces among the plurality of display screens at any time, for example, a user interface of a first display screen and a user interface of a second display screen are exchanged, if the user interface of two display screens is to be exchanged, a developer is required to fix touch screen channels corresponding to the user interface and the display screens in software in advance, then the product can be upgraded, and inconvenience is brought to the use of the user.
Accordingly, there is a need for further improvements in the art.
Disclosure of Invention
The invention provides a multi-screen display switching method and device based on a virtual machine, which aim to overcome the defects in the prior art and realize the automatic matching of touch data channels and a user interface after screen changing display.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
in one aspect, the present invention provides a method for switching multi-screen display based on a virtual machine, including:
step 1, receiving a screen changing display instruction, and determining an initiating display screen and a target display screen;
step 2, determining a corresponding client window after screen changing display of the initiating display screen and the target display screen;
step 3, determining a second matching relationship according to the first matching relationship, wherein the first matching relationship is a matching relationship between a client window and a virtual touch device channel, and the second matching relationship is a target virtual touch device channel for mounting the virtual touch device corresponding to the initiating display screen and the target display screen;
step 4, re-mounting virtual touch equipment corresponding to the initiating display screen and the target display screen according to the second matching relation;
and step 5, the received touch data is sent to the corresponding client window through the corresponding virtual touch equipment channel.
Specifically, the step 4 includes:
step 401, unloading virtual touch devices corresponding to the initiating display screen and the target display screen;
and step 402, re-mounting the corresponding virtual touch equipment according to the second matching relation.
Further, before the step 1, the method further comprises:
a1, acquiring mounting information of a display device and a touch device, and generating a corresponding virtual touch device according to the touch device;
a2, obtaining the corresponding relation between the display screen and the display output channel;
and A3, loading display content according to the display setting stored last time by the host system for display.
Specifically, the display device and the touch device are mounted in the same order.
Another aspect of the present invention provides a virtual machine-based multi-screen display switching apparatus, including:
the system comprises a first display component formed by a first display screen and a first touch screen, a second display component formed by a second display screen and a second touch screen, a host window set, a host window manager, a display data page, a shared display data page and a synthesizer, wherein the host window set at least comprises one host window, the host window manager, the display data page, the shared display data page and the synthesizer are arranged in a host system;
the host window set, the host window manager, the display data page, the shared display data page, the synthesizer and the first display component are sequentially connected, and the synthesizer is also connected with the shared display data page and the second display component; the client window set, the client window manager, the shared output configuration module, the touch matching module and the touch distribution module are sequentially connected, the client window manager is further connected with the switching module, the touch distribution module is further connected with the client window set, the shared output configuration module is connected with the shared display data page, and the touch matching module is further connected with the first display assembly and the second display assembly;
the display screen is used for receiving the display data sent by the synthesizer and displaying the display data;
the touch screen is used for receiving touch information and generating touch data;
the window set is used for drawing a user interface or presenting a video stream;
the window manager is used for managing the creation, destruction and parameter configuration of the windows in the host system and the client system;
the display data page is used for receiving the window data sent by the window manager and caching the window data;
the shared display data page is used for directly mapping the data to be displayed by the client system to the corresponding display data page in the host system;
the synthesizer is used for synthesizing the display data in the display data page or the shared display data page and outputting the synthesized display data to a corresponding display screen through the display output interface;
the shared output configuration module is used for acquiring the configuration parameters of the display change and sending the configuration parameters to the shared display data page and the touch matching module;
the touch matching module is used for matching a window in the virtual machine system with touch data generated by the touch screen;
the touch distribution module is used for distributing the received touch data to a window corresponding to the client system according to a preset matching relation between the window in the client system and the virtual touch equipment channel;
the switching module is used for initiating an instruction of screen changing display.
Specifically, the shared display data page and the display data page establish a one-to-one correspondence through a direct mapping mode.
Specifically, the touch matching module is a virtual hardware device bus, and is configured to mount a virtual touch device, and includes: the touch control device comprises a first virtual touch device, a second virtual touch device, a first virtual touch channel and a second virtual touch channel;
the first virtual touch device corresponds to the first touch screen, and the second virtual touch device corresponds to the second touch screen.
Specifically, the touch matching module determines a target virtual touch device channel on which the virtual touch device corresponding to the first display screen and the second display screen is mounted according to a matching relationship between the client window and the virtual touch device channel.
Specifically, the display data page includes at least one display output channel, the display output channel includes at least one hardware layer, the shared display data page includes at least one shared display output channel, and the display output channel includes at least one shared hardware layer.
The invention has the beneficial effects that: according to the method and the device for automatically matching the touch data channel with the user interface after screen changing display, the corresponding client windows after screen changing display of the initiating display screen and the target display screen are determined, and the target virtual touch device channels for mounting the virtual touch devices corresponding to the initiating display screen and the target display screen are determined according to the matching relation between the client windows and the virtual touch device channels, so that the corresponding virtual touch devices are mounted again, and the user interface after screen changing display is automatically matched with the touch data channels.
Drawings
FIG. 1 is a flow chart of a virtual machine-based multi-screen display switching method of the present invention;
fig. 2 is a schematic structural diagram of a multi-screen display switching device based on a virtual machine according to the present invention.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which are for reference and illustration only, and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, this embodiment provides a multi-screen display switching method based on a virtual machine, including:
step 1, receiving a screen changing display instruction, and determining an initiating display screen and a target display screen.
The screen changing display means that the content displayed on the initiating display screen (for example, the first display screen) which sends the screen changing display instruction currently and the content displayed on the target display screen (for example, the second display screen) are exchanged and displayed. Of course, in a system with more than two display screens, the first display screen may be displayed interchangeably with the content of any of the other display screens.
And 2, determining a corresponding client window after screen changing display of the initiating display screen and the target display screen.
For example, the initiating display (first display) corresponds to the client window 2_1 before the screen change display; after screen changing display, a client window 2_2 corresponds to the initiating display screen (first display screen); likewise, the target display (second display) corresponds to the client window 2_2 before the screen change display, and corresponds to the client window 2_1 after the screen change display.
And 3, determining a second matching relationship according to the first matching relationship, wherein the first matching relationship is a matching relationship between a client window and a virtual touch device channel, and the second matching relationship is a target virtual touch device channel for mounting the virtual touch device corresponding to the initiating display screen and the target display screen.
The first matching relationship may be set in advance and stored in the client system.
In one practical example, the first matching relationship is shown in table 1.
TABLE 1
| Window number | First virtual touch device channel (VCh _1) | Second virtual touch device channel (VCh _2) |
| Window 2_1 | √ | × |
| Window 2_2 | × | √ |
| Window 2_3 | × | √ |
| Window 2_4 | × | √ |
| Window 2_5 | √ | × |
Table 1 shows that data of the first virtual touch device channel (VCh _1) can be transmitted to the windows 2_1, 2_5, and data of the second virtual touch device channel (VCh _2) can be transmitted to the windows 2_2, 2_3, 2_4.
For example, if the target display (second display) is to display the content of the window 2_1, it can be seen from table 1 that the target virtual touch device channel of the second virtual touch device corresponding to the second touch screen matched with the target display (second display) is the first virtual touch device channel.
And 4, re-mounting the virtual touch devices corresponding to the initiating display screen and the target display screen according to the second matching relation.
In this embodiment, the step 4 includes:
and step 401, unloading the virtual touch devices corresponding to the initiating display screen and the target display screen.
And step 402, re-mounting the corresponding virtual touch equipment according to the second matching relation.
For example, when the second matching relationship is:
a first virtual touch device MUT second virtual touch device channel;
the second virtual touch device MUT is the first virtual touch device channel;
wherein MUT represents mount.
Then, the first virtual touch device is mounted to the second virtual touch device channel and the second virtual touch device is mounted to the first virtual touch device channel.
And step 5, the received touch data is sent to the corresponding client window through the corresponding virtual touch equipment channel.
After the virtual touch device is re-mounted, touch data on the first virtual touch device channel can be sent to the window 2_2, and touch data on the second virtual touch device channel can be sent to the window 2_1, so that self-adaptive matching of the user interface and the touch data is completed.
In another embodiment of the present invention, before the step 1, the method further includes:
and A1, acquiring mounting information of the display equipment and the touch equipment, and generating corresponding virtual touch equipment according to the touch equipment.
In this embodiment, the display device and the touch device are mounted in the same order.
For example, when the system is started, the host computer system mounts the first display screen first and then mounts the second display screen, and then the first touch screen and the second touch screen matched with the first display screen and the second display screen are mounted according to the same sequence. Of course, the display device and the touch device may be mounted in different orders.
After the host computer system finishes the mounting of the display equipment and the touch equipment, the mounting information is sent to the client computer system.
The virtual touch device corresponding to the first touch screen is a first virtual touch device VNm _a, and the virtual touch device corresponding to the second touch screen is a second virtual touch device VNm _b.
And A2, acquiring the corresponding relation between the display screen and the display output channel.
The corresponding relation between the display screen and the display output channel can be preset by the host system and sent to the client system.
For example, the target output display screen of the content in the first display output channel is a first display screen, and the target output display screen of the content in the second display output channel is a second display screen. That is, the content of the first display output channel is output to the first display screen for display, the content of the second display output channel is output to the second display screen for display, and so on.
And A3, loading display content according to the display setting stored last time by the host system for display.
For example, the last saved display setting is that the first display screen displays the content of window 2_1 in the client system and the second display screen displays the content of window 2_2 in the client system.
Example 2
As shown in fig. 2, this embodiment provides a multi-screen display switching device based on a virtual machine, including:
the system comprises a first display component formed by a first display screen and a first touch screen, a second display component formed by a second display screen and a second touch screen, a host window set, a host window manager, a display data page, a shared display data page and a synthesizer, wherein the host window set at least comprises one host window, the host window manager, the display data page, the shared display data page and the synthesizer are arranged in a host system;
the host window set, the host window manager, the display data page, the shared display data page, the synthesizer and the first display component are sequentially connected, and the synthesizer is also connected with the shared display data page and the second display component; the client window set, the client window manager, the shared output configuration module, the touch matching module and the touch distribution module are sequentially connected, the client window manager is further connected with the switching module, the touch distribution module is further connected with the client window set, the shared output configuration module is connected with the shared display data page, and the touch matching module is further connected with the first display assembly and the second display assembly;
the display screen is used for receiving the display data sent by the synthesizer and displaying the display data;
the touch screen is used for receiving touch information and generating touch data;
the window set is used for drawing a user interface or presenting a video stream;
the window manager is used for managing the creation, destruction and parameter configuration of the windows in the host system and the client system;
the display data page is used for receiving the window data sent by the window manager and caching the window data;
the shared display data page is used for directly mapping the data to be displayed by the client system to the corresponding display data page in the host system;
the synthesizer is used for synthesizing the display data in the display data page or the shared display data page and outputting the synthesized display data to a corresponding display screen through the display output interface;
the shared output configuration module is used for acquiring the configuration parameters of the display change and sending the configuration parameters to the shared display data page and the touch matching module;
the touch matching module is used for matching a window in the virtual machine system with touch data generated by the touch screen;
the touch distribution module is used for distributing the received touch data to a window corresponding to the client system according to a preset matching relation between the window in the client system and the virtual touch equipment channel;
the switching module is used for initiating an instruction of screen changing display.
In this embodiment, the shared display data page and the display data page establish a one-to-one correspondence in a direct mapping manner.
In this way, the client system can display the data of window 2_1, window 2_2 onto the corresponding display screen directly by sharing the hardware layers in the display data page.
In another embodiment of the present invention, the touch matching module is a virtual hardware device bus, configured to mount a virtual touch device, and includes: the touch control device comprises a first virtual touch device, a second virtual touch device, a first virtual touch channel and a second virtual touch channel;
the first virtual touch device corresponds to the first touch screen, and the second virtual touch device corresponds to the second touch screen.
The virtual touch device includes a device name and a channel number.
The name (VNm) of the virtual touch channel device can be set as desired at system design time. For example, the name of a first virtual touch channel device corresponding to a first touch screen that is paired with a first display screen is set to VNm _a, the name of a second virtual touch channel device corresponding to a second touch screen that is paired with a second display screen is set to VNm _b, and so on.
The channel numbers (VCh _1, VCh _ … VCh _n) of the virtual touch channel devices are determined according to the mounting sequence of the virtual touch channel devices, and the mounting sequence of the virtual touch channel devices can be changed according to the needs, so that the same virtual touch channel device can be mounted on virtual touch channels with different channel numbers according to the needs.
In another embodiment of the present invention, the touch matching module determines a target virtual touch device channel on which the virtual touch device corresponding to the first display screen and the second display screen is mounted according to a matching relationship between the client window and the virtual touch device channel.
In another embodiment of the present invention, the display data page includes at least one display output channel, the display output channel includes at least one hardware layer, the shared display data page includes at least one shared display output channel, and the display output channel includes at least one shared hardware layer.
In the implementation, the corresponding relation between the display output channel and the display screen includes the following situations, and the specific mode can be selected according to the actual design:
1) One display output channel corresponds to one display screen, for example: the hardware layers of the first display output channel are synthesized and output to the first display screen, and the hardware layers of the second display output channel are synthesized and output to the second display screen;
2) One display output channel corresponds to a plurality of display screens, and specifically includes:
a) Each hardware layer of each display output channel corresponds to a display screen.
For example, the hardware layer 1_1 in fig. 2 is synthesized and output to the first display screen, and the hardware layer 1_2 is output to the second display screen.
b) Each hardware layer of each display output channel corresponds to a plurality of display screens.
For example, the hardware layer 1_1 in fig. 2 is divided into two halves, the left half is synthesized and output to the first display screen, and the right half is synthesized and output to the second display screen.
For a clearer description of the operation of the device, examples are as follows:
the touch screen matched with the first display screen is a first touch screen, the name of a corresponding first virtual touch device is VNm _A, the touch screen matched with the second display screen is a second touch screen, and the name of a corresponding second virtual touch device is VNm _B.
The window 2_1 of the current client system sends display data (e.g., a web interface) to the shared hardware layer 1_1, displays it on the first display screen, and the first virtual touch device VNm _a is mounted on the first virtual touch channel VCh _1; the window 2_2 of the client system transmits display data (e.g., a video picture) to the shared hardware layer 2_1, displays it on the second display screen, and the second virtual touch channel device VNm _b is mounted on the second virtual touch channel VCh _2.
After the client window manager receives the instruction of screen changing display of the switching module:
1) Switching of display content
The method comprises the steps that a shared output configuration module obtains window configuration parameters of a shared hardware layer 1_1 and a shared hardware layer 2_1, and sends the window configuration parameters to a client window manager of a client system, wherein the window configuration parameters comprise window size, window number, layer longitudinal serial number and display format;
the client window manager of the client system sends window 2_1 to the shared hardware layer 2_1 with display data (e.g. video picture) and window configuration parameters of the shared hardware layer 1_1 according to the preset corresponding relation between the window and the shared hardware layer, the synthesizer synthesizes and outputs the display data according to the window configuration parameters to be displayed on the first display screen, and sends window 2_2 of the client system to the shared hardware layer 1_1 with display data (e.g. web page interface) and window configuration parameters of the shared hardware layer 2_1, and the synthesizer synthesizes and outputs the display data according to the window configuration parameters to be displayed on the first display screen.
2) Synchronous switching of touch data
a) The shared output configuration module outputs the window configuration parameters of the display change to the touch matching module while sending the window configuration parameters to a client window manager of the client system.
b) The touch matching module unloads virtual touch equipment corresponding to the touch screen matched with the display screen for exchanging display contents.
For example, in this proposal, if the display contents of the first display screen and the second display screen need to be exchanged, the first virtual touch device VNm _a corresponding to the first touch screen matched with the first display screen and the second virtual touch device VNm _b corresponding to the second touch screen matched with the second display screen are unloaded.
c) And determining windows in the client system corresponding to the display screens after the display is exchanged.
For example, after the exchange display, the first display corresponds to window 2_2, and the second display corresponds to window 2_1.
d) And the touch matching module determines a target virtual touch equipment channel for mounting the virtual touch equipment corresponding to the first display screen and the second display screen according to the matching relation between the client window and the virtual touch equipment channel, and mounts the corresponding virtual touch equipment.
For example, the virtual touch channel corresponding to the window 2_2 displayed on the first display screen is the second virtual touch channel VCh _2, so that the first virtual touch device VNm _a corresponding to the first touch screen matched with the first display screen is mounted on the second virtual touch channel VCh _2;
the virtual touch channel corresponding to the window 2_1 displayed on the second display screen is the first virtual touch channel VCh _1, and therefore, the second virtual touch device VNm _b corresponding to the second touch screen matched with the second display screen is mounted on the first virtual touch channel VCh _1.
d) And the touch distribution module sends the received touch data to the corresponding window through the corresponding virtual touch equipment channel.
For example, when touch data of the virtual touch device VNm _b (corresponding to the second touch screen) is received, then the touch data is distributed to the window 2_1 of the client system, and when touch data of the virtual touch device VNm _a (corresponding to the first touch screen) is received, the touch data is distributed to the window 2_2 of the client system.
The above disclosure is illustrative of the preferred embodiments of the present invention and should not be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (5)
1. A multi-screen display switching method based on a virtual machine is characterized by comprising the following steps:
step 1, receiving a screen changing display instruction, and determining an initiating display screen and a target display screen;
step 2, determining a corresponding client window after screen changing display of the initiating display screen and the target display screen;
step 3, determining a second matching relationship according to the first matching relationship, wherein the first matching relationship is a matching relationship between a client window and a virtual touch device channel, and the second matching relationship is a target virtual touch device channel for mounting the virtual touch device corresponding to the initiating display screen and the target display screen;
step 4, re-mounting virtual touch equipment corresponding to the initiating display screen and the target display screen according to the second matching relation;
step 5, the received touch data is sent to the corresponding client window through the corresponding virtual touch equipment channel;
before the step 1, the method further comprises the following steps:
a1, acquiring mounting information of a display device and a touch device, and generating a corresponding virtual touch device according to the touch device;
a2, obtaining the corresponding relation between the display screen and the display output channel;
step A3, the host system loads display content according to the display setting saved last time to display;
the display device and the touch device are mounted in the same order.
2. The virtual machine-based multi-screen display switching method according to claim 1, wherein the step 4 comprises:
step 401, unloading virtual touch devices corresponding to the initiating display screen and the target display screen;
and step 402, re-mounting the corresponding virtual touch equipment according to the second matching relation.
3. A virtual machine-based multi-screen display switching device, comprising:
the system comprises a first display component formed by a first display screen and a first touch screen, a second display component formed by a second display screen and a second touch screen, a host window set, a host window manager, a display data page, a shared display data page and a synthesizer, wherein the host window set at least comprises one host window, the host window manager, the display data page, the shared display data page and the synthesizer are arranged in a host system;
the host window set, the host window manager, the display data page, the shared display data page, the synthesizer and the first display component are sequentially connected, and the synthesizer is also connected with the shared display data page and the second display component; the client window set, the client window manager, the shared output configuration module, the touch matching module and the touch distribution module are sequentially connected, the client window manager is further connected with the switching module, the touch distribution module is further connected with the client window set, the shared output configuration module is connected with the shared display data page, and the touch matching module is further connected with the first display assembly and the second display assembly;
the display screen is used for receiving the display data sent by the synthesizer and displaying the display data;
the touch screen is used for receiving touch information and generating touch data;
the window set is used for drawing a user interface or presenting a video stream;
the window manager is used for managing the creation, destruction and parameter configuration of the windows in the host system and the client system;
the display data page is used for receiving the window data sent by the window manager and caching the window data;
the shared display data page is used for directly mapping the data to be displayed by the client system to the corresponding display data page in the host system;
the synthesizer is used for synthesizing the display data in the display data page or the shared display data page and outputting the synthesized display data to a corresponding display screen through the display output interface;
the shared output configuration module is used for acquiring the configuration parameters of the display change and sending the configuration parameters to the shared display data page and the touch matching module;
the touch matching module is used for matching a window in the virtual machine system with touch data generated by the touch screen;
the touch distribution module is used for distributing the received touch data to a window corresponding to the client system according to a preset matching relation between the window in the client system and the virtual touch equipment channel;
the switching module is used for initiating an instruction of screen changing display;
the touch matching module is a virtual hardware device bus and is used for mounting virtual touch devices, and comprises: the touch control device comprises a first virtual touch device, a second virtual touch device, a first virtual touch channel and a second virtual touch channel; the first virtual touch device corresponds to the first touch screen, and the second virtual touch device corresponds to the second touch screen;
and the touch matching module determines a target virtual touch equipment channel of the virtual touch equipment corresponding to the first display screen and the second display screen according to the matching relation between the client window and the virtual touch equipment channel.
4. A virtual machine based multi-screen display switching apparatus as recited in claim 3, wherein the display data page comprises at least one display output channel, the display output channel comprises at least one hardware layer, the shared display data page comprises at least one shared display output channel, and the display output channel comprises at least one shared hardware layer.
5. The virtual machine-based multi-screen display switching apparatus of claim 4, wherein the shared display data page and the display data page establish a one-to-one correspondence by way of direct mapping.
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