CN111273883A - Same-screen display method and device for multiple operating systems and terminal equipment - Google Patents
Same-screen display method and device for multiple operating systems and terminal equipment Download PDFInfo
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Abstract
The embodiment of the invention discloses a method, a device and a terminal device for displaying a same screen of multiple operating systems, wherein the method comprises the following steps: the main operating system allocates a continuous memory as a display cache region and splits the display cache region into cache subareas with corresponding number according to the total number of the operating systems; the master operating system allocates a buffer subarea for each slave operating system, so that each slave operating system maps the addresses of the allocated buffer subareas into respective image frame buffer areas; after each operating system stores the image data into the respective image frame buffer area, the main operating system controls the display screen controller to send all the image data to different display areas of the display screen through the bus so as to synchronously display the image data from different operating systems. The technical scheme of the invention can effectively solve the data synchronization among the operating systems, does not need to perform window division, data overlay and other processing, can realize one-time splitting and multiple use, and greatly reduces the extra expenses of a CPU (Central processing Unit) and an internal memory.
Description
Technical Field
The invention relates to the technical field of image display, in particular to a method and a device for displaying on the same screen of multiple operating systems and terminal equipment.
Background
At present, the main process of the scheme for displaying different operating systems on the same display screen is as follows: the data of the first operating system needs to be transmitted to the second operating system, then window division, UI interface overlay and other processing are completed in the second operating system, and then the data are transmitted to a frame buffer area of the second operating system, and finally the data are uniformly transmitted to a display screen. However, for this solution, the following drawbacks have been found in practical use: the transmission of image data streams between operating systems takes time, and the data synchronization effect between a plurality of operating systems is not good; meanwhile, window division, map overlay processing and the like are required in the second operating system, which not only takes time, but also increases extra consumption of memory and occupation of CPU resources and the like because a copy is required during map overlay, that is, a copy is required from one cache region to another cache region, which puts a certain pressure on the fluency of the system.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a method and an apparatus for displaying on the same screen of multiple operating systems, and a terminal device.
One embodiment of the invention provides a same-screen display method of a multi-operating system, wherein the multi-operating system comprises a main operating system and at least one slave operating system, the main operating system is used for driving and controlling a display screen controller, and the display screen controller is connected with a display screen through a bus; the method comprises the following steps:
the main operating system allocates a continuous memory as a display cache region and splits the display cache region into cache subareas with corresponding number according to the total number of the operating systems;
the main operating system allocates a buffer subarea for each slave operating system, so that each slave operating system maps the address of the allocated buffer subarea into a respective image frame buffer area;
and after each operating system stores the image data into the respective image frame buffer area, the main operating system controls the display screen controller to send all the image data to different display areas of the display screen through the bus so as to synchronously display the image data from different operating systems.
Further, in the above on-screen display method for multiple operating systems, the method further includes:
and the main operating system controls the display screen controller to acquire the image data of the display cache region at regular time and sends the image data to the corresponding display region of the display screen through the bus so as to realize synchronous display updating.
Further, in the above method for displaying on the same screen of a multi-operating system, the size of the display buffer is greater than or equal to the number of pixels of the display screen multiplied by the number of bytes of each pixel.
Further, in the above on-screen display method of multiple operating systems, the master operating system allocates buffer sub-areas of corresponding sizes according to the image frame size of each slave operating system.
Further, in the method for displaying on the same screen by using multiple operating systems, the bus supports that the pixels of the display screen are sequentially refreshed according to the memory address sequence.
Further, in the above-mentioned on-screen display method of multiple operating systems, the bus is an LVDS bus, an MIPI bus or an SPI bus.
Another embodiment of the present invention provides a display device on the same screen with multiple operating systems, where the multiple operating systems include a master operating system and at least one slave operating system, the master operating system is used to drive and control a display screen controller, and the display screen controller is connected to a display screen through a bus; the device is applied to a main operating system, and comprises:
the display cache region splitting module is used for allocating a continuous memory as a display cache region and splitting the display cache region into cache subregions with corresponding number according to the total number of the operating systems;
the buffer subarea allocation mapping module is used for allocating a buffer subarea for each slave operating system so that the slave operating systems map the addresses of the allocated buffer subareas into respective image frame buffer areas;
and the synchronous display control module is used for controlling the display screen controller to send all the image data to different display areas of the display screen through the bus after the image data are stored in respective image frame buffer areas by each operating system so as to synchronously display the image data from different operating systems.
Further, in the above-mentioned on-screen display device with multiple operating systems, the size of the display buffer is greater than or equal to the sum of pixels of the display screen multiplied by the number of bytes of each pixel.
Another embodiment of the present invention provides a terminal device, including: the display device comprises a processor and a memory, wherein the memory stores a computer program, and the processor is used for executing the computer program to implement the on-screen display method of the multi-operation system.
Yet another embodiment of the present invention provides a computer-readable storage medium storing a computer program, which, when executed, implements the on-screen display method according to the above-mentioned multi-operating system.
The technical scheme of the embodiment of the invention has the following beneficial effects:
the method provided by the embodiment of the invention realizes the repeated use of one-time splitting by taking a continuous memory in the main operating system as a display cache region and splitting the continuous memory into cache subareas which are respectively mapped to the slave operating systems to be used as image frame cache subareas of the slave operating systems, and compared with the prior art, the data transmission is not needed among the operating systems for the subsequent display sending, so that the transmission time is saved; and the data are sent to the display screen by using a hardware bus, so that the problem of data synchronization among operating systems can be effectively solved, and the additional expenses of a CPU (Central processing Unit) and an internal memory can be reduced because window division, data overlay and the like are not needed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
FIG. 1 is a schematic application diagram of a display method of multiple operating systems on the same screen according to an embodiment of the present invention;
FIG. 2 is a first flowchart of a method for on-screen display of multiple operating systems according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a split cache sub-area of a co-screen display method of a multi-operating system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an on-screen display device of a multi-operating system according to an embodiment of the present invention.
Description of the main element symbols:
10-one-screen display device of multiple operating systems; 110-display buffer splitting module; 120-cache sub-region allocation mapping module; 130-synchronous display control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides a method for displaying contents of multiple operating systems on the same screen, which can be applied to various electronic products such as a computer PC, a mobile phone, a vehicle-mounted image, and the like, and can display contents of multiple operating systems on the same screen. For example, in an on-vehicle scene, a central control instrument and a vehicle machine (for short, an on-vehicle infotainment product) generally used for displaying a speed of a vehicle and the like employ two different operating systems, and the existing designs use two display screens to respectively display corresponding contents. If the method of the embodiment is used, the display screen corresponding to the central control instrument can be omitted, the content of the central control instrument is displayed on the display screen of the vehicle machine, and certainly, the display screen of the vehicle machine can be omitted and simultaneously displayed on the display screen of the central control instrument, so that the space occupation of the screen is reduced, and the like.
Exemplarily, as shown in fig. 1, the multiple operating systems include a master operating system and at least one slave operating system, where the master operating system and each slave operating system are capable of communicating, and the master operating system has the control authority of the display screen controller and can be used to drive and control the display screen controller to perform related operations. And the display screen controller is connected with a display screen through a corresponding hardware bus. The display screen will be used to display different contents of a plurality of operating systems, such as may include but is not limited to LCD liquid crystal screens, OLED liquid crystal screens, and the like.
It can be understood that an operating system generally needs to run on a motherboard, and when the operating system needs to operate a hardware device, a corresponding driver needs to be installed in the system, so as to implement operation control on the hardware device. In this embodiment, the display screen controller is a hardware control circuit for performing display control on a display screen serving as a display device. For example, in the above vehicle-mounted scenario, the multi-operating system may include a QNX main operating system of the central control instrument and an Android slave operating system of the vehicle, so that the display screen is the display screen of the central control instrument, and the central control instrument further includes a controller of the display screen. Or, the Android operating system of the treadmill can be used as a master operating system, the exercise bracelet worn by the user and based on the Android operating system can be used as a slave operating system, and the generated motion image data can be sent to the treadmill in a wired or wireless mode for the exercise bracelet without a display screen or with a small display screen, so that the user can simultaneously play the video content of the master operating system through the display screen of the treadmill during running, and can also observe the motion image data of the user in real time, thereby improving the exercise experience of the user and the like.
The main steps of the method are explained in detail below, as shown in fig. 2.
Step S10, the main operating system allocates a continuous memory as a display buffer area, and splits the display buffer area into corresponding number of buffer sub-areas according to the total number of the operating systems.
For the above step S10, exemplarily, to control the display device, the main operating system may allocate a memory with continuous addresses as a display buffer through the corresponding display driver, so that the display controller sends the image data in the display buffer to the display for direct display through the bus. It is understood that the contiguous memory is owned and used by the host operating system.
Preferably, the size of the display buffer should be greater than or equal to the sum of the pixels of the display screen multiplied by the number of bytes of each pixel, that is, not less than the size of bytes occupied by all the pixels of the display screen. Typically, each pixel in a display screen consists of 3 bytes. It will be appreciated that the display buffer is also continuous and may be sized according to the actual display content or display screen, etc.
When the display cache region is divided, the display cache region can be divided into corresponding number of cache subregions according to the total number of the current operating systems, namely, one cache subregion corresponding to one operating system is met.
In a preferred embodiment, when each cache sub-region is split, the main operating system may split the display cache region into cache sub-regions of different sizes according to different requirements of each operating system. Exemplarily, it may be determined according to the size of the image frame of each operating system, etc. It can be understood that the operating systems with different sizes are split, so that the complete display requirements of the operating systems can be met, and when the operating systems are subsequently sent to a display screen for display, the content is relatively continuous, the overall visual effect of a user is better, and the like. Of course, the splitting of the contiguous memory may also adopt other splitting manners, such as average splitting.
In step S20, the master operating system allocates a buffer sub-area for each slave operating system, so that each slave operating system maps the addresses of the allocated buffer sub-areas to the respective image frame buffer areas.
For the above step S20, exemplarily, after the memory with consecutive addresses is divided into several cache subregions, the main operating system will allocate the cache subregions to the corresponding operating systems respectively. The storage addresses of the display buffer area are continuous, and the storage addresses of the divided buffer sub-areas are different. Illustratively, the master operating system may send the memory addresses of different cache subdivisions to different slave operating systems. For example, the cache partitions can be divided into private cache partitions and non-private cache partitions, wherein the private cache partitions are allocated to the master operating system itself, and the other non-private cache partitions are allocated to the slave operating systems respectively.
As shown in fig. 3, for each of the buffer sub-areas buffer a, buffer B, and buffer C … buffer N, the master operating system may sequentially allocate the split continuous memory to the slave operating system a, the slave operating system B, and the slave operating system C to the master operating system N, where the buffer N may be a private buffer sub-area. The size of the cache subdivisions may be the same or different, and is determined by the splitting manner described above.
The allocation means that each operating system can regard the allocated cache sub-area as its own memory for use. After each slave operating system obtains the data storage address of the allocated buffer subarea, the data storage address of the buffer subarea is mapped to the storage address of the image frame data of the slave operating system, namely the image frame buffer. Thus, when new image data is acquired, each operating system will fill the acquired image data into the buffer sub-area.
Step S30, after each operating system stores the image data into its respective image frame buffer, the main operating system controls the display screen controller to send all the image data to different display areas of the display screen through the bus, so as to synchronously display the image data from different operating systems.
Exemplarily, the main operating system controls the display controller to send all image data to the display screen for display. In this embodiment, the bus can support that the pixels of the display screen are sequentially refreshed according to the memory address sequence. Because the storage addresses of the display buffer area are continuous, all the image data are sequentially presented on the display screen in a row or a column by a bus connected to the display screen according to the address sequence of the continuous memory, so that the display screen is automatically divided into different display areas, and the image data of different operating systems are completely displayed. Illustratively, the bus may include, but is not limited to, an LVDS bus, a MIPI bus, or a SPI bus, etc.
In this embodiment, the source of the image data of each operating system is not limited, and the image data may be from an image shot by a camera, an image downloaded from the internet, a USB video, or the like. It can be understood that the embodiment is intended to solve the problem of how to implement the on-screen display inside the multi-operating system.
In consideration of the fact that after the display cache region is well split for the first time, each operating system only needs to store the acquired image data to the respective cache sub-region when the subsequent screen refreshing display is carried out. Further optionally, in the above method for displaying on the same screen of multiple operating systems, the method further includes: and the main operating system controls the display screen controller to acquire the image data of the display cache region at regular time and sends the image data to the corresponding display region of the display screen through a bus so as to realize synchronous display updating.
Exemplarily, when each operating system continuously stores image data into a corresponding buffer sub-area, in order to update display content in time, the main operating system may control the display screen controller to periodically obtain image data according to a preset time interval or a cyclic scanning manner, and control the display controller to send the new image data to a corresponding display area, thereby achieving the purpose of synchronous update.
The on-screen display method of the multi-operating system provided by the embodiment has the following characteristics:
(1) by taking a continuous memory in a main operating system as a display buffer area, splitting the continuous memory into buffer subareas and respectively mapping the buffer subareas to each slave operating system to be used as image frame buffer subareas of each slave operating system, the coordinates realize that one operating system is used for sending and displaying (short for the process from sending to displaying), the data transmission time consumed by sending and displaying the data by the existing operating systems is the same as that consumed by sending and displaying the data by the existing operating systems, the sending and displaying delay of certain operating system data does not exist, and the problem of sending and displaying asynchronization among the operating systems does not exist;
(2) the image data memory used by a plurality of operating systems can still be the byte size occupied by all pixels of the display screen, and other extra memories are not occupied; compared with the scheme of window division and graph folding of the existing operating system, the method does not need to copy from one cache region to another cache region, so that extra memory consumption is not required to be increased;
(3) different memory areas are displayed in different areas of the display screen by adopting a bus supporting that all pixel points are sequentially refreshed according to the address sequence on hardware, and the data from different operating systems do not need to be subjected to window division, data overlay and other processing through software, so that the consumption of CPU (Central processing Unit) resources can be greatly reduced;
(4) after each cache subarea is well split and mapped to each operating system for the first time, each operating system only needs to store the acquired image data in the corresponding cache subarea when the display content is updated subsequently, and data transmission among the operating systems is not needed, so that the data transmission time is saved, and the expenditure of a CPU (central processing unit) is further reduced.
Example 2
Referring to fig. 4, based on the on-screen display method of multiple operating systems in embodiment 1, this embodiment provides an on-screen display device 10 of multiple operating systems, where the multiple operating systems include a master operating system and at least one slave operating system, the master operating system is used to drive and control a display screen controller, and the display screen controller is connected to a display screen through a bus; the device is applied to a main operating system and comprises:
a display buffer splitting module 110, configured to allocate a continuous memory as a display buffer, and split the display buffer into buffer sub-regions with corresponding numbers according to the total number of operating systems;
a buffer subarea allocation mapping module 120, configured to allocate a buffer subarea for each slave operating system, so that each slave operating system maps addresses of the allocated buffer subareas to a respective image frame buffer area;
and a synchronous display control module 130, configured to control the display screen controller to send all image data to different display areas of the display screen through the bus after each operating system stores the image data in its respective image frame buffer, so as to synchronously display the image data from different operating systems.
It is to be understood that the on-screen display device 10 of the multi-os described above corresponds to the on-screen display method of the multi-os of embodiment 1. Any of the options in embodiment 1 are also applicable to this embodiment, and will not be described in detail here.
The invention also provides a terminal device, such as a computer, a mobile phone, a vehicle-mounted image and other electronic devices, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor enables the terminal device to execute the function of each module in the on-screen display method of the multi-operation system or the on-screen display device of the multi-operation system by running the computer program.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The present invention also provides a computer-readable storage medium for storing the computer program used in the above-mentioned terminal device.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. The multi-operating system is characterized by comprising a main operating system and at least one slave operating system, wherein the main operating system is used for driving and controlling a display screen controller which is connected with a display screen through a bus; the method comprises the following steps:
the main operating system allocates a continuous memory as a display cache region and splits the display cache region into cache subareas with corresponding number according to the total number of the operating systems;
the main operating system allocates a buffer subarea for each slave operating system, so that each slave operating system maps the address of the allocated buffer subarea into a respective image frame buffer area;
and after each operating system stores the image data into the respective image frame buffer area, the main operating system controls the display screen controller to send all the image data to different display areas of the display screen through the bus so as to synchronously display the image data from different operating systems.
2. The method for on-screen display of multiple operating systems according to claim 1, further comprising:
and the display screen controller acquires the image data of the display cache region at regular time and sends the image data to the corresponding display region of the display screen through the bus so as to realize synchronous display updating.
3. The method of claim 1, wherein the size of the display buffer is equal to or greater than the number of pixels of the display screen multiplied by the number of bytes per pixel.
4. The on-screen display method of multiple operating systems according to claim 1, wherein the master operating system allocates buffer sub-regions of corresponding sizes according to the image frame size of each slave operating system.
5. The method according to claim 1, wherein the bus supports sequential refreshing of pixels of the display screen according to a memory address order.
6. The on-screen display method of multiple operating systems according to claim 5, wherein the bus is an LVDS bus, an MIPI bus or an SPI bus.
7. The multi-operating system same-screen display device is characterized in that the multi-operating system comprises a main operating system and at least one slave operating system, wherein the main operating system is used for driving and controlling a display screen controller, and the display screen controller is connected with a display screen through a bus; the device is applied to a main operating system, and comprises:
the display cache region splitting module is used for allocating a continuous memory as a display cache region and splitting the display cache region into cache subregions with corresponding number according to the total number of the operating systems;
the buffer subarea allocation mapping module is used for allocating a buffer subarea for each slave operating system so that the slave operating systems map the addresses of the allocated buffer subareas into respective image frame buffer areas;
and the synchronous display control module is used for controlling the display screen controller to send all the image data to different display areas of the display screen through the bus after the image data are stored in respective image frame buffer areas by each operating system so as to synchronously display the image data from different operating systems.
8. The multi-os on-screen display device of claim 7, wherein the size of the display buffer is equal to or larger than the sum of pixels of the display screen multiplied by the number of bytes per pixel.
9. A terminal device, comprising: a processor and a memory, the memory storing a computer program for execution by the processor to implement the on-screen display method of the multi-operating system of any of claims 1 to 6.
10. A computer-readable storage medium characterized by storing a computer program which, when executed, implements the on-screen display method of a multi-operating system according to any one of claims 1 to 6.
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| CN114510294A (en) * | 2022-02-18 | 2022-05-17 | 蔚来汽车科技(安徽)有限公司 | Vehicle-mounted fusion display method, system and device |
| CN114567802A (en) * | 2021-12-29 | 2022-05-31 | 沈阳中科创达软件有限公司 | Data display method and device |
| WO2023198190A1 (en) * | 2022-04-16 | 2023-10-19 | 展讯半导体(成都)有限公司 | Image display method and apparatus, and terminal device and storage medium |
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