CN108009977B - Method and system for supporting multiple remote graphic terminals in multi-thread environment - Google Patents
Method and system for supporting multiple remote graphic terminals in multi-thread environment Download PDFInfo
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Abstract
The invention provides a method and a system for supporting a plurality of remote graphic terminals in a multithreading environment. The window instance module is loaded to a target system and is bound on the virtual graphic terminal; the target system executes window instance drawing through an event callback mechanism, synchronizes an event to the multi-terminal manager, and the multi-terminal manager distributes a drawing result to corresponding virtual graphic terminal equipment; and activating each remote graphic terminal, sending the drawing result received by the virtual graphic terminal equipment to the remote graphic terminal, and displaying the drawing result and providing a graphical interactive environment by the remote graphic terminal. The invention has low requirements on software and hardware resources, and reduces the system cost and power consumption; and multi-terminal graphic display support is provided for the multi-thread embedded operating system, and the application capability of the embedded operating system is improved.
Description
Technical Field
The invention relates to the field of computer application, in particular to basic display control and window system management interaction of a remote graphic terminal, and particularly relates to a method and a system for supporting a plurality of remote graphic terminals (simple graphic terminals) without operating systems in a multithread embedded operating system environment.
Background
Multithreading is a frugal multitask operation mode, the multithreading environment has the advantages of simple program logic and control mode, shared memory of all threads, no need of crossing process boundaries, less resource consumption compared with a process mode and the like, and is generally applied to lightweight embedded equipment. However, each thread and the main program share an address space, the target system can only have one GUI thread, and all windows can only be created, controlled and destroyed in the GUI thread, so that code involvement is strong, development must be transparent, system resources occupy a large amount, and the breakdown of a single window causes the breakdown of the whole GUI thread, even the system breakdown.
A remote graphic terminal is mainly applied to remote computer graphic interface interaction, and a relatively common solution at present is a mode that a graphic system (such as X Window) based on a C/S framework and a local system intercept display data and transmit the display data to the remote display terminal. For the X Window class C/S architecture, the remote graphic terminal equipment needs hardware resources such as a CPU (central processing unit), a memory and the like, and also needs to be provided with an operating system, so that the hardware cost is high, the resource consumption is high, and the method is not suitable for a multi-thread embedded operating system; the solution of intercepting and capturing the display data cannot meet the requirement of multiple terminals, namely, a scheme for managing and controlling multiple remote graphic terminal nodes is lacked.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to provide a method and system for supporting multiple remote graphics terminals in a multi-threaded environment.
The method for supporting a plurality of remote graphic terminals in a multithreading environment provided by the invention comprises the following steps:
step 1: establishing a multi-terminal manager in a multi-thread environment, and realizing interconnection with a remote graphic terminal;
step 2: and activating each remote graphic terminal to provide a graphical interactive environment.
Preferably, the step 1 comprises:
step 1.1: creating at least one window instance module for the target system;
step 1.2: a multi-terminal manager is established in a target system, and a plurality of virtual graphic terminals are established according to the number of the remote graphic terminals and are in one-to-one correspondence with the remote graphic terminals;
step 1.3: configuring the attribute of the virtual graphic terminal according to the physical parameters of the remote graphic terminal, and allocating an independent memory space for each virtual graphic terminal;
step 1.4: the window instance module is loaded to a target system and bound on the virtual graphic terminal;
step 1.5: and the target system executes window instance drawing through an event callback mechanism, synchronizes the event to the multi-terminal manager, and the multi-terminal manager distributes a drawing result to corresponding virtual graphic terminal equipment.
Preferably, the step 1.4 comprises:
one-to-one binding: a single window instance is displayed on a single virtual graphic terminal;
binding one to many, and displaying a single window instance on a plurality of virtual graphic terminals;
many-to-one binding, multiple window instances are displayed on a single virtual graphical terminal.
Preferably, in step 1.3, the attributes of the virtual graphic terminal include the length and width of the screen, the resolution and bit depth of the image.
Preferably, the step 2 comprises:
step 2.1: constructing a virtual graphic terminal context resource;
step 2.2: the multi-terminal manager and the virtual graphic terminal messages are aggregated and managed, and pre-starting is carried out;
step 2.3: the multi-terminal manager is in communication interconnection with each remote graphic terminal, graphical data and equipment acquisition data are interacted, and the related interaction states of the multi-terminal manager and the remote graphic terminals of the target system are updated;
step 2.4: and (3) carrying out graphic data transmission, wherein the drawing result received by the virtual graphic terminal equipment is sent to the remote graphic terminal, and the remote graphic terminal interprets and displays the drawing result after receiving the data.
Preferably, said step 2.1 comprises:
the human engineering equipment brings in non-necessary but important resources, and the rest resources are automatically distributed by the virtual graphic terminal on the basis of not influencing the interaction of the basic graphic;
the graphic display basic module and the internal communication protocol incorporate necessary and important resources, and carry out the most basic initialization and the connectivity test.
Preferably, the pre-starting in step 2.2 comprises:
and finishing information registration and interconnection confirmation, abstracting the remote graphic terminal into layers, and constructing a basic mapping matrix of the actual remote graphic terminal equipment coordinate, the target system world coordinate and the logical coordinate.
Preferably, in step 2.3:
the format of the graphical data is negotiated and determined by the remote graphic terminal and the multi-terminal manager, so that the consistency of the graphic data stream is controlled together, and the synchronous updating of the two ends is ensured;
the data collected by the equipment is generated by the interactive operation of users, real-time feedback is adopted, and full duplex communication is realized.
Preferably, the remote graphic terminal is a remote simple graphic terminal, and the virtual graphic terminal is a virtual simple graphic terminal.
According to the present invention, there is provided a system for supporting a plurality of remote graphic terminals in a multi-threaded environment, comprising:
the multi-terminal manager: establishing a multithreading environment and interconnecting with a remote graphic terminal;
a plurality of virtual graphic terminals: the number of the remote graphic terminals is equal to that of the remote graphic terminals and the remote graphic terminals correspond to each other one by one;
a window instance module: creating at least one window instance module to a target system;
the window instance module is loaded to a target system and is bound on the virtual graphic terminal; the target system executes window instance drawing through an event callback mechanism, synchronizes an event to the multi-terminal manager, and the multi-terminal manager distributes a drawing result to corresponding virtual graphic terminal equipment; and activating each remote graphic terminal, sending the drawing result received by the virtual graphic terminal equipment to the remote graphic terminal, and displaying the drawing result and providing a graphical interactive environment by the remote graphic terminal.
Compared with the prior art, the invention has the following beneficial effects:
1. the requirements on software and hardware resources are low, and the system cost and the power consumption are reduced;
2. multi-terminal graphic display support is provided for a multi-thread embedded operating system, and the application capability of the embedded operating system is improved;
3. the graphic terminal is realized on a terminal (simple terminal) without an operating system, the application scene of the embedded equipment is expanded, and the expandable capability of the graphic terminal prolongs the life cycle of the embedded product.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a flow chart of step 1 of the present invention;
FIG. 2 is a flow chart of step 2 of the present invention;
FIG. 3 is a system diagram of one-to-one binding of a window instance module with a virtual simple graphic terminal in accordance with the present invention;
FIG. 4 is a system diagram of one-to-many binding of a window instance module with a virtual simple graphic terminal in accordance with the present invention;
FIG. 5 is a block diagram of a system for many-to-one binding of a window instance module with a virtual simple graph terminal in accordance with the present invention;
FIG. 6 is a timing diagram illustrating the synchronous interaction of the multi-terminal manager with a remote simple graphic terminal according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention provides a method for supporting a plurality of remote graphic terminals in a multithreading environment, which mainly comprises the following steps:
step 1: establishing a multi-terminal manager in a multi-thread environment, and realizing interconnection with a remote graphic terminal;
step 2: and activating each remote graphic terminal to provide a graphical interactive environment.
As shown in fig. 1, step 1 includes:
step 1.1: at least one window instance module is created for the target system, and can be dynamically loaded and unloaded to the target system, so that flexibility, closure and independence are provided for the target system.
The stretchability means: a user can dynamically load or unload the module according to the resource use condition of the target system so as to ensure the performance of the system;
the sealing property is as follows: the modules are independent from each other and can be provided in a binary form to support module source program confidentiality, the application can be divided into a plurality of modules according to an application structure, and the modules can be developed in parallel;
the independence means that: the target graphic system is independent of the code of the window program, the dynamic loading module creates a window, the dynamic unloading module destroys the window, and the target system provides a modular management mechanism for the window instance.
Step 1.2: and a multi-terminal manager is established in the target system, and a plurality of virtual graphic terminals are established according to the number of the remote graphic terminals and are in one-to-one correspondence with the remote graphic terminals.
Step 1.3: according to the physical parameters of the remote graphic terminal, the attributes of the virtual graphic terminal are configured, including the length and the width of a screen, the resolution ratio and the bit depth of an image and the like, and an independent memory space is allocated for each virtual graphic terminal.
Step 1.4: and the window instance module is loaded to the target system and is bound on the virtual graphic terminal.
The binding of the window instance module and the virtual graphic terminal is as follows:
one-to-one binding as shown in FIG. 3: a single window instance is displayed on a single virtual graphical terminal, as shown in fig. 4 for one-to-many binding: a single window instance is displayed on multiple virtual graphical terminals, and a many-to-one binding as shown in fig. 5: multiple window instances are displayed on a single virtual graphics terminal.
Step 1.5: and the target system executes window instance drawing through an event callback mechanism, synchronizes the event to the multi-terminal manager, and the multi-terminal manager distributes a drawing result to corresponding virtual graphic terminal equipment.
As shown in fig. 2, step 2 includes:
step 2.1: and constructing virtual graphic terminal context resources.
The human engineering equipment brings in non-necessary but important resources, and the rest resources are automatically distributed by the virtual graphic terminal on the basis of not influencing the interaction of the basic graphic;
the graphic display basic module and the internal communication protocol incorporate necessary and important resources, and carry out the most basic initialization and the connectivity test.
Step 2.2: and the multi-terminal manager and the virtual graphic terminal messages are aggregated and managed, and the pre-starting is carried out.
Pre-starting a state similar to 'handshake completion', mainly completing information registration and interconnection confirmation, abstracting and layering the remote graphic terminal, and constructing a basic mapping matrix of actual remote graphic terminal equipment coordinates, target system world coordinates and logical coordinates.
Step 2.3: as shown in fig. 6, the multi-terminal manager communicates with each remote graphic terminal, interacts graphic data and device acquisition data, and updates the related interaction state of the multi-terminal manager and the remote graphic terminal of the target system.
The format of the graphical data is negotiated and determined by the remote graphic terminal and the multi-terminal manager, the part has updating delay and is influenced by network bandwidth and transmission rate, a 'producer consumer' strategy is adopted, the multi-terminal manager and the remote graphic terminal jointly control the consistency of the graphical data stream, and the synchronous updating of the two ends is ensured;
the data collected by the equipment is generated by user interactive operation, real-time feedback is adopted, and full duplex communication is realized, so that the synchronization of two ends can be well kept.
Step 2.4: and (3) carrying out graphic data transmission, wherein the drawing result received by the virtual graphic terminal equipment is sent to the remote graphic terminal, and the remote graphic terminal interprets and displays the drawing result after receiving the data.
On the basis of the method for supporting a plurality of remote graphic terminals in the multithreading environment, the invention also provides a system for supporting a plurality of remote graphic terminals in the multithreading environment, which comprises the following steps:
the multi-terminal manager: establishing a multithreading environment and interconnecting with a remote graphic terminal;
a plurality of virtual graphic terminals: the number of the remote graphic terminals is equal to that of the remote graphic terminals and the remote graphic terminals correspond to each other one by one;
a window instance module: creating at least one window instance module to a target system;
the window instance module is loaded to a target system and is bound on the virtual graphic terminal; the target system executes window instance drawing through an event callback mechanism, synchronizes an event to the multi-terminal manager, and the multi-terminal manager distributes a drawing result to corresponding virtual graphic terminal equipment; and activating each remote graphic terminal, sending the drawing result received by the virtual graphic terminal equipment to the remote graphic terminal, and displaying the drawing result and providing a graphical interactive environment by the remote graphic terminal.
In the invention, the remote graphic terminal is a remote simple graphic terminal, the virtual graphic terminal is a virtual simple graphic terminal, and the simple terminal is a terminal without an operating system. The graphic terminal is realized on the simple terminal, the application scene of the embedded equipment is expanded, and the expandable capability of the graphic terminal prolongs the life cycle of the embedded product.
The invention provides a solution for managing and controlling the display and interaction of a plurality of remote graphic terminals by taking a multi-thread target system as a main control module aiming at the multi-terminal requirements on an embedded multi-thread operating system, thereby not only giving consideration to the pain of insufficient resources of the embedded system, but also effectively solving the problems of requirements on the management, control, interaction and the like of a remote graphic system and fully meeting the requirements of a lightweight embedded system.
Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, units provided by the present invention as pure computer readable program code, the system and its various devices, modules, units provided by the present invention can be fully implemented by logically programming method steps in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units included in the system for realizing various functions can also be regarded as structures in the hardware component; means, modules, units for performing the various functions may also be regarded as structures within both software modules and hardware components for performing the method.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (8)
1. A method for supporting a plurality of remote graphics terminals in a multithreaded environment, comprising the steps of:
step 1: establishing a multi-terminal manager in a multi-thread environment, and realizing interconnection with a remote graphic terminal;
step 2: activating each remote graphic terminal to provide a graphical interaction environment;
the step 1 comprises the following steps:
step 1.1: creating at least one window instance module for the target system;
step 1.2: a multi-terminal manager is established in a target system, and a plurality of virtual graphic terminals are established according to the number of the remote graphic terminals and are in one-to-one correspondence with the remote graphic terminals;
step 1.3: configuring the attribute of the virtual graphic terminal according to the physical parameters of the remote graphic terminal, and allocating an independent memory space for each virtual graphic terminal;
step 1.4: the window instance module is loaded to a target system and bound on the virtual graphic terminal;
step 1.5: the target system executes window instance drawing through an event callback mechanism, synchronizes an event to the multi-terminal manager, and the multi-terminal manager distributes a drawing result to corresponding virtual graphic terminal equipment;
the step 2 comprises the following steps:
step 2.1: constructing a virtual graphic terminal context resource;
step 2.2: the multi-terminal manager and the virtual graphic terminal messages are aggregated and managed, and pre-starting is carried out;
step 2.3: the multi-terminal manager is in communication interconnection with each remote graphic terminal, graphical data and equipment acquisition data are interacted, and the related interaction states of the multi-terminal manager and the remote graphic terminals of the target system are updated;
step 2.4: and (3) carrying out graphic data transmission, wherein the drawing result received by the virtual graphic terminal equipment is sent to the remote graphic terminal, and the remote graphic terminal interprets and displays the drawing result after receiving the data.
2. The method for supporting multiple remote graphics terminals in a multithreaded environment of claim 1, wherein step 1.4 comprises:
one-to-one binding: a single window instance is displayed on a single virtual graphic terminal;
binding one to many, and displaying a single window instance on a plurality of virtual graphic terminals;
many-to-one binding, multiple window instances are displayed on a single virtual graphical terminal.
3. The method for supporting multiple remote graphics terminals in a multithreaded environment as recited in claim 1, wherein in step 1.3, the attributes of the virtual graphics terminal include length and width of a screen, resolution and bit depth of an image.
4. The method of claim 1, wherein the step 2.1 comprises:
the human engineering equipment brings in non-necessary but important resources, and the rest resources are automatically distributed by the virtual graphic terminal on the basis of not influencing the interaction of the basic graphic;
the graphic display basic module and the internal communication protocol incorporate necessary and important resources, and carry out the most basic initialization and the connectivity test.
5. The method of claim 1, wherein the pre-booting in step 2.2 comprises:
and finishing information registration and interconnection confirmation, abstracting the remote graphic terminal into layers, and constructing a basic mapping matrix of the actual remote graphic terminal equipment coordinate, the target system world coordinate and the logical coordinate.
6. The method for supporting multiple remote graphics terminals in a multithreaded environment as recited in claim 1, wherein in step 2.3:
the format of the graphical data is negotiated and determined by the remote graphic terminal and the multi-terminal manager, so that the consistency of the graphic data stream is controlled together, and the synchronous updating of the two ends is ensured;
the data collected by the equipment is generated by the interactive operation of users, real-time feedback is adopted, and full duplex communication is realized.
7. The method of claim 1, wherein the remote graphics terminal is a remote simple graphics terminal and the virtual graphics terminal is a virtual simple graphics terminal.
8. A system for supporting a plurality of remote graphics terminals in a multithreaded environment, comprising:
the multi-terminal manager: establishing a multithreading environment and interconnecting with a remote graphic terminal;
a plurality of virtual graphic terminals: the number of the remote graphic terminals is equal to that of the remote graphic terminals and the remote graphic terminals correspond to each other one by one;
a window instance module: creating at least one window instance module to a target system;
the window instance module is loaded to a target system and is bound on the virtual graphic terminal; the target system executes window instance drawing through an event callback mechanism, synchronizes an event to the multi-terminal manager, and the multi-terminal manager distributes a drawing result to corresponding virtual graphic terminal equipment; activating each remote graphic terminal, sending the drawing result received by the virtual graphic terminal equipment to the remote graphic terminal, and displaying the drawing result and providing a graphical interactive environment by the remote graphic terminal;
the system supporting a plurality of remote graphics terminals in a multithreaded environment performing the method of claim 1.
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| CN109726023B (en) * | 2018-12-12 | 2023-05-23 | 中国航空工业集团公司西安航空计算技术研究所 | Graphic task synchronous management method supporting multithreading and multiple contexts |
| CN109886867A (en) * | 2019-01-16 | 2019-06-14 | 周口师范学院 | A kind of image processing method for mobile intelligent terminal |
| CN111580816B (en) * | 2020-05-08 | 2022-08-09 | 深圳市九洲智和科技有限公司 | Intelligent tablet terminal based on interactive graphic software |
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