CN102929570A - Screen drawing method and device - Google Patents
Screen drawing method and device Download PDFInfo
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- CN102929570A CN102929570A CN2012103647635A CN201210364763A CN102929570A CN 102929570 A CN102929570 A CN 102929570A CN 2012103647635 A CN2012103647635 A CN 2012103647635A CN 201210364763 A CN201210364763 A CN 201210364763A CN 102929570 A CN102929570 A CN 102929570A
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Abstract
The invention provides a screen drawing method which is used for enabling screen display content data on second display equipment to be displayed on first display equipment. The method comprises the steps as follows: screen display content data sent from the second display equipment are received through network, and the screen display content data are data of screen display contents in changed screen areas of screen display areas of the second display equipment; the received screen display content data are used to cover a corresponding area of full-screen display content data duplicate stored in a storage device of the first display equipment; and the full-screen display content data duplicate obtained after covering processing is drawn on the main surface of the first display equipment for displaying. By adoption of the method, requirements on video memory can be lowered, Flip and other operations are reduced during the drawing process, and meanwhile, the situation that pictures need to be coordinated and matched between the two surfaces can be avoided.
Description
Technical field
The present invention relates to the screen mirror image technology, more specifically, relate to a kind of screen describing method and device.
Background technology
The screen mirror image technology refers to the screen display content of certain equipment (such as, smart mobile phone) is transferred to the technology that shows on another equipment (such as PC).Fig. 1 shows the synoptic diagram of an application of screen mirror image technology.As shown in Figure 1, the screen display content on the smart mobile phone can be transferred on the display of PC by WiFi and show.
Fig. 2 shows the process flow diagram of the operation flow of screen mirror image technology.As shown in Figure 2, in this operation flow, at first, obtain screen display content and be encapsulated as packet in device A.Then, by Internet Transmission (wireless transmission and/or wire transmission, normally wireless transmission), with the encapsulation after data packet transmission to equipment B.Then, after equipment B receives packet, the packet that receives is unpacked processing, and the display screen of equipment B describe and display device A on shown screen content.
According to different platforms, the realization of above-mentioned each step is different.Describe performance in order to improve, " describing " step of carrying out in equipment B under windows platform generally by describing to realize based on DirectDraw.In the prior art, in order to realize animation effect, generally adopt the Flip mode to describe.The principle of work of Flip is similar to the projection process of cinefilm.Every one page of film is the picture of a static state.When these films being switched fast and render to successively on the screen, just produced animation.Flip utilizes this principle to show animation just.Particularly, the Flip plotting method mainly relies on the continuous switching between two surfaces to show animation.Common way is: apply for two surfaces (Surface), one is first type surface (Primary Surface), and the content of storing on this surface is the content that shows on the screen of device A; Another is secondary surface (Back Surface), as a surface for subsequent use of first type surface.By constantly upgrading the content of secondary surface, and and first type surface switch and tell on, as shown in Figure 3.
Fig. 4 shows the synoptic diagram that Flip describes process.As shown in Figure 4, at step S410, when equipment B receives by network behind the packet of device A transmission, the packet that receives is unpacked processing.To unpack the data copy that obtains after the processing to secondary surface (step S420), then the screen updates notice is sent to window treatments function (step S430).After sending the screen updates notice, network-side proceeds to step S470, waits for new network data.The window treatments function calls the Flip function after receiving screen updates notice (step S440), secondary surface is switched to foreground (step S450), becomes first type surface and is presented on the screen.Then, at step S460, the window treatments function blocks, and waits for new screen updates notice.After receiving new screen updates notice, turn back to step S440.Meanwhile, first type surface originally switches to secondary surface and stashes, and has finished thus the transition from a frame to another frame.Wholely describe process as shown in Figure 4.
Yet there is following problems in the plotting method of above-mentioned employing Flip mode.
At first, this plotting method adopts the asynchronous pattern of describing based on message informing, has increased the expense of the process of describing, and can not tackle the strict occasion of performance requirement.Describe in the pattern asynchronous; in order to protect the context environmental of the process of describing; need to lock when describing process entering; withdraw from and need release when describing process; latching operation belongs to the operation of read/write memory; need to spend more nearly 300 times time of expense than general CPU operation, this slow speed operation is inapplicable for describing fast the strict occasion of this performance requirement.
Secondly, in this plotting method, adopt two surfaces to rotate.In this case, when only having occured partly to change, screen can go wrong.As shown in Figure 5.Suppose on the device A successively display frame A, frame B and frame C, wherein frame A compares with frame B, and variation has occured whole picture, and frame B compares with frame C and only changed a small region, i.e. pink zone among the figure.At 1 o'clock constantly, device A display frame A, and with frame A by Internet Transmission to equipment B, equipment B copies it to secondary surface after receiving frame A, then sends the screen updates request, whole process is shown in Fig. 5 A.At 2 o'clock constantly, the major-minor surface has occured equipment B switched, and with the first type surface that switches to of the secondary surface of previous moment, and was presented on the screen.At this moment, the positive display frame B of device A, and frame B is transferred to equipment B, equipment B is copied to secondary surface with it after receiving data, shown in Fig. 5 D.At 3 o'clock constantly, same, switching occured in the major-minor surface of equipment B, and secondary surface originally becomes present first type surface and is presented on the screen.At this moment, the screen of device A only has sub-fraction that variation has occured, and in order to save the network bandwidth, device A only sends the zone that changes has occured, i.e. pink zone among the figure.Equipment B is transferred to secondary surface with it after receiving this zone, shown in Fig. 5 C.Like this, at 4 o'clock constantly, the content in the secondary surface will be shown on the screen, shown in Fig. 5 D.This shows, show after the frame C on the device A is transferred on the equipment B, become the combination of frame A and pink region of variation, mistake occurred.
In addition, in above-mentioned plotting method, call the Flip function and switch two surfaces, the effect of this function is the switching of carrying out the major-minor surface.This switches needs to consume the regular hour.In addition, in the situation of picture localized variation, still need to carry out the switching on whole surface, also caused certain wasting of resources.
Summary of the invention
In view of above-mentioned, the object of the present invention is to provide a kind of surperficial plotting method of list and device of network-data driving, it can after receiving network data, come to realize that on single surface two show the screen mirror image between arranging with synchronization mechanism.
According to an aspect of the present invention, a kind of screen plotting method is provided, be used for being implemented in the screen display content that shows on the first display device on the second display device, described method comprises: receive the screen display content data that send from the second display device by network, described screen display content data are data of the screen display content of the screen area that changes in the on-screen display (osd) area of the second display device; After receiving described screen display content data, utilize the corresponding region in the full screen display content-data copy of storing in the memory storage of screen display content data cover the first display device receive, the full screen display content-data copy of storing in the described memory storage be before receiving described screen display content data on the screen of the first display device the copy of the full frame screen display content data of current demonstration; And will be plotted to through the full screen display content-data copy that will obtain after cover processing on the first type surface of the first display device and show that described first type surface is unique display surface that described the first display device obtains.
In one or more examples aspect above-mentioned, described screen display content data send when only the screen display content on the second display device changes.
In one or more examples aspect above-mentioned, the full screen display content-data copy that will obtain after will processing through covering is plotted to when showing on the described first type surface, only draws the screen area corresponding with described screen display content data.
In one or more examples aspect above-mentioned, the data transmission rate of described the second display device is adjusted according to the real surplus buffer size of the impact damper that is used for receive data of described the first display device.
According to a further aspect in the invention, a kind of screen drawing apparatus is provided, be used for being implemented in the display data on the screen that shows on the first display device on the second display device, described screen drawing apparatus comprises: receiving element, be used for receiving the screen display content data that send from the second display device by network, described screen display content data are data of the screen display content of the screen area that changes in the on-screen display (osd) area of the second display device; Storage unit is used for storage full screen display content-data copy, described full screen display content-data copy be before receiving described screen display content data on described the first display device the copy of the full frame screen display content data of current demonstration; Capping unit is used for utilizing the corresponding region in the full screen display content-data copy of storing in the described storage unit of screen display content data cover that receives after receiving described screen display content data; And the screen drawing unit, the full screen display data trnascription after being used for processing through covering is plotted on the described first type surface and shows that described first type surface is unique display surface that described the first display device obtains.
In one or more examples aspect above-mentioned, described screen display content data send when only the screen display on the second display device changes.
In one or more examples aspect above-mentioned, the full screen display content-data copy that will obtain after will processing through covering is plotted to when showing on the described first type surface, only draws the screen area corresponding with described screen display content data.
In one or more examples aspect above-mentioned, the data transmission rate of described the second display device is adjusted according to the real surplus buffer size of the impact damper that is used for receive data of described the first display device.
According to a further aspect in the invention, a kind of screen plotting method is provided, be used for being implemented in the screen display content that shows on the first display device on the second display device, described method comprises: receive the screen display content data that send from the second display device by network, the on-screen display (osd) area of described the second display device is a plurality of segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas that changes in the on-screen display (osd) area of the second display device; After receiving described screen display content data, utilize the corresponding segmented areas in the full screen display content-data copy of storing in the memory storage of screen display content data cover the first display device receive, described full screen display content-data copy be before receiving described screen display content data on the screen of described the first display device the copy of the full frame screen display content data of current demonstration; Obtain the union of all the corresponding segmented areas corresponding with described screen display content data; And the screen area that this union is corresponding is plotted on the first type surface of described the first display device and shows that described first type surface is unique display surface that described the first display device obtains.
According to a further aspect in the invention, a kind of screen drawing apparatus is provided, be used for being implemented in the screen display content that shows on the first display device on the second display device, described screen tracing device comprises: receiving element, be used for receiving the screen display content data that send from the second display device by network, the on-screen display (osd) area of described the second display device is a plurality of segmented areas by piecemeal, and the data of the screen display content of the segmented areas that changes in the described screen display content data on-screen display (osd) area that is second display devices; Storage unit is used for storage full screen display content-data copy, described full screen display content-data copy be before receiving described screen display content data on described the first display device the copy of the full frame screen display content data of current demonstration; Capping unit is used for utilizing the corresponding segmented areas in the full screen display content-data copy of storing in the described storage unit of screen display content data cover that receives after receiving described screen display content data; The union acquiring unit is for the union of obtaining all the corresponding segmented areas corresponding with described screen display content data; And the screen drawing unit, be used for showing that described first type surface is unique display surface that described the first display device obtains on the first type surface that the screen area that this union is corresponding is plotted to described the first display device.
Utilize the surperficial plotting method of above-mentioned list and device, describe by utilizing single surface, can reduce the requirement to video memory, reduced the operations such as Flip of describing in the process, avoided simultaneously the problem that picture need to be coordinated to mate between two surfaces.
In addition, in the present invention, Adoption Network drives and directly describes, and avoids using message trigger, has simplified and has described flow process, has also reduced the dependence to the operating system message mechanism.
In addition, in the present invention, by in the memory storage of the first display device, being stored in the full screen display data trnascription that receives the screen of current demonstration before the display data on the screen that changes, and after receiving the display data on the screen that changes, utilize this display data on the screen that changes to cover the corresponding region of the full screen display data trnascription of storing, then the full screen display data trnascription after will covering is plotted in the first type surface of the first display device, can avoid single surface to describe to occur the phenomenon of mosaic.
In order to realize above-mentioned and relevant purpose, one or more aspects of the present invention comprise the feature that the back will describe in detail and particularly point out in the claims.Following explanation and accompanying drawing describe some illustrative aspects of the present invention in detail.Yet, the indication of these aspects only be some modes that can use in the variety of way of principle of the present invention.In addition, the present invention is intended to comprise all these aspects and their equivalent.
Description of drawings
According to following detailed description of carrying out with reference to accompanying drawing, above and other purpose of the present invention, feature and advantage will become more apparent.In the accompanying drawings:
Fig. 1 shows the synoptic diagram of an application of screen mirror image technology;
Fig. 2 shows the process flow diagram of the operation flow of screen mirror image technology;
Fig. 3 shows the synoptic diagram of the continuous handoff procedure between two surfaces in the Flip plotting method;
Fig. 4 shows the synoptic diagram that Flip describes process;
Fig. 5 A-5D illustrates the design sketch of each process in the Flip describing method when screen only occurs partly to change;
Fig. 6 shows the process flow diagram according to the screen plotting method of the first embodiment of the present invention;
Fig. 7 A shows the synoptic diagram when not carrying out the mosaic Processing for removing when transmitting terminal only sends change regional;
Fig. 7 B shows the synoptic diagram when carrying out the mosaic Processing for removing when transmitting terminal only sends change regional;
Fig. 8 shows by the value of regulating the iSCSI receiving end window size and regulates the process flow diagram that transmitting terminal sends the speed of data;
Fig. 9 shows the block diagram according to the screen drawing apparatus of the first embodiment of the present invention;
Figure 10 shows the process flow diagram of screen plotting method according to a second embodiment of the present invention; With
Figure 11 shows the block diagram of screen drawing apparatus according to a second embodiment of the present invention.
Identical label is indicated similar or corresponding feature or function in institute's drawings attached.
Embodiment
Various aspects of the present disclosure are described below.Should be understood that the instruction of this paper can be with varied form imbody, and disclosed any concrete structure, function or both only are representational in this article.Based on the instruction of this paper, those skilled in the art should be understood that an aspect disclosed herein can be independent of any other side and realize, and the two or more aspects in these aspects can make up according to variety of way.For example, can use the aspect of any number described in this paper, implement device or hands-on approach.In addition, can use other structure, function or except one or more aspects described in this paper or be not the 26S Proteasome Structure and Function of one or more aspects described in this paper, realize this device or put into practice this method.In addition, any aspect described herein can comprise at least one element of claim.
The below describes each embodiment of the present invention with reference to Fig. 6 to Figure 11.
The first embodiment
Fig. 6 shows the process flow diagram according to the surperficial plotting method of list of the network-data driving of the first embodiment of the present invention, the method is used for being implemented in the display data on the screen that shows on the first display device on the second display device, and the method is carried out by the first display device.
As shown in Figure 6, at step S610, receive the display data on the screen that sends from the second display device by network.Here, described screen display content data are data of the screen display content of the screen area that changes in the on-screen display (osd) area of the second display device.Described network can be wireless network or cable network.Described wireless network can be WiFi, bluetooth, 2G communication network, 3G communication network or other cordless communication network.Described cable network can be communication network or cable TV network etc.
After receiving described display data on the screen, at step S620, after receiving described screen display content data, utilize the corresponding region in the full screen display content-data copy of storing in the memory storage of screen display content data cover the first display device receive, the full screen display content-data copy of storing in the described memory storage be before receiving described screen display content data on the screen of the first display device the copy of the full frame screen display content data of current demonstration.If the full frame screen display content data of current demonstration are updated on the screen of the first display device, the copy of then storing in the memory storage also will upgrade.
Then, at step S630, will be plotted to through the full screen display content-data copy that will obtain after cover processing on the first type surface of the first display device and show, thereby show display data on the screen on the second display device at the first display device.Described first type surface is unique display surface that the first display device obtains.
When the screen change scope was very little, in order to save bandwidth, transmitting terminal (that is, the second display device) only can send the zone that changes, and like this, just might receive a lot of little rectangle that belongs to same frame at receiving end (that is, the first display device).
In this case, namely describe if receive a little rectangle at every turn, the process of then describing is subjected to the impact of network rate, adds that the process of describing is a very fast process, some renewal zone then will occur and refresh, and other upgrade the situation that the zone has little time to refresh.This processing mode is also referred to as the processing mode of not carrying out the mosaic Processing for removing.Fig. 7 A shows the synoptic diagram when not carrying out the mosaic Processing for removing when transmitting terminal only sends change regional.Shown in Fig. 7 A, when when changing in the zone 1 on the device A (that is, the second display device), zone 2, zone 3, zone 4 and the zone 5, on equipment B (that is, the first display device), only depict zone 1 and zone 2.
And in the processing procedure shown in Figure 6, finish after the first display device is drawn and shown the full screen display data, in the memory storage of the first display device, keep a copy (hereinafter being called the full screen display data trnascription) of these full screen display data.Like this, after receiving the regional display data on the screen of a plurality of renewals that sends from the second display device, no matter be once to receive simultaneously or repeatedly receive, all after receiving the regional display data on the screen of renewal, utilize the renewal zone display data on the screen that receives to cover the respective regions of full screen display data trnascription.For example, when once receiving simultaneously, with all data covers on respective regions.When repeatedly receiving, receive when upgrading regional display data on the screen at every turn, all the renewal display data on the screen that receives is covered last time through covering on the full screen display data trnascription that obtains after the processing.For example, when receiving first and upgrade regional display data on the screen, upgrade regional display data on the screen with this first and cover on the full screen display data trnascription of storing in the memory storage, thereby obtain through covering for the first time the full screen display data trnascription after processing.Receiving second when upgrading regional display data on the screen, with this second display data on the screen cover through cover for the first time after processing to the full screen display data trnascription on.The like, until finish the covering that all upgrade regional display data on the screen, obtain thus finishing the full screen display data trnascription of all renewals.Like this, only need to once describe operation, just can be implemented in the display data on the screen that shows on the first display device on the second display device, partly describe and to form the phenomenon of mosaic thereby eliminated.
Fig. 7 B shows the synoptic diagram when carrying out the mosaic Processing for removing when transmitting terminal only sends change regional.When changing in the zone 1 on the device A (that is, the second display device), zone 2, zone 3, zone 4 and the zone 5, on equipment B (that is, the first display device), depict whole full screen display data.
As above with reference to Fig. 6, Fig. 7 A and 7B the screen describing method according to the first embodiment of the present invention is described.Foregoing description only is exemplary, rather than restrictive.Can also carry out various modification to the first embodiment.
In the modification of this embodiment, described display data on the screen sends when only the screen display on described the second display device changes.
In another modification of this embodiment, in the time will being plotted to described first type surface through the full screen display content-data copy that will obtain after cover processing and showing, only draw the screen area corresponding with described screen display content data.
In addition, in another modification of this embodiment, the display data on the screen that sends from the second display device can be to comprise through the network data that packing is processed.In this case, screen plotting method according to the present invention can also comprise: after receiving described network packet, the network packet that receives is unpacked processing, to obtain the display data on the screen on the second display device.
In addition, in another modification of this embodiment, when utilizing the network-data driving screen to describe, if the operation of describing on the first display device is not finished, then the first display device can not read new data from network-side.In this case, the data transmission rate of described the second display device can be adjusted according to the real surplus buffer size of the impact damper that is used for receive data of described the first display device.
Fig. 8 shows by the value of regulating the iSCSI receiving end window size and regulates the process flow diagram that transmitting terminal sends the speed of data, and described iSCSI receiving end window size namely is the real surplus buffer size of the impact damper that is used for receive data of the first display device.For example, suppose at a time that the first display device is in screen and describes the stage, this moment is not from the network side reading out data.When network data arrived continuously, the buffer zone of TCP can take gradually because of the arrival of data, and namely residual buffer district size diminishes gradually.In this case, transmitting terminal can utilize in the Transmission Control Protocol " window size " data bit to notify transmitting terminal, what of the data volume that the value representation buffer zone of window size can also receive.
As can be seen from Figure 8, data are not removed, and then window size diminishes gradually, and the transmission rate of transmitting terminal also diminishes gradually, after window size becomes 0, then suspend data and send.Finish until receiving end is described operation, meshwork buffering district data are taken away, then receiving end has again new cushion space can be used for receive data.Therefore, receiving end upgrades the window size of oneself, the data volume that notice transmitting terminal oneself can receive, and like this, transmitting terminal begins again to send data to receiving end.Thus, by tcp window size adjustment mechanism, it is consistent the receiving velocity of data can be adjusted to the speed of describing with screen, thereby realizes rate-matched.
Fig. 9 shows the block diagram according to the screen drawing apparatus 900 of the first embodiment of the present invention.As shown in Figure 9, screen drawing apparatus 900 can comprise receiving element 910, capping unit 920, storage unit 930 and screen drawing unit 940.
Receiving element 910 is used for receiving the screen display content data that send from the second display device by network, and described screen display content data are data of the screen display content of the screen area that changes in the on-screen display (osd) area of the second display device.
Storage unit 930 is used for storage full screen display content-data copy, described full screen display content-data copy be before receiving described screen display content data on described the first display device the copy of the full frame screen display content data of current demonstration.
Capping unit 920 is used for utilizing the corresponding region in the full screen display content-data copy of storing in the described storage unit of screen display content data cover that receives after receiving described screen display content data.
Full screen display data trnascription after screen drawing unit 940 is used for processing through covering is plotted on the described first type surface and shows that described first type surface is unique display surface that described the first display device obtains.
In addition, in other embodiments of the invention, can also carry out modification to screen drawing apparatus 900.For example, when the display data on the screen that sends from the second display device is the network packet of processing through packing, described screen drawing apparatus can also comprise the unwrapper unit (not shown), be used for after receiving described network packet, the network packet that receives is unpacked processing, to obtain the display data on the screen on the second display device.
In according to the first embodiment of the present invention, utilize the mechanism described synchronously to replace the asynchronous mechanism of describing, reduced the message transmission, describe that process need prevents from competing etc. additionally consumes, and improved and described performance.And only use a surface to describe, avoided the problem of using two surfaces to describe to bring.At last, describe synchronously mechanism owing to adopt, so that network side can perception be described the speed of speed, adjust the speed that transmitting terminal sends data by tcp window size adjustment mechanism, thereby coupling to be described speed and network transmission speed.
In this embodiment, use single surface to describe.The method is ceaselessly to redraw fast covering work doing with one page.Two surfaces also need constantly to do and redraw overlapping operation, only this operation are put into secondary surface and carry out, wait the preliminary work of secondary surface to carry out after, more whole page or leaf is switched to the foreground and shows.When the speed that redraws was very fast, this working mechanism that two surfaces are described just seemed very burdensome.And when being network-side in the source of describing data, for describing speed, the speed of Internet Transmission is generally slower.Simultaneously, minimum through the time delay that shows again behind the Internet Transmission in order to make screen content, should describe immediately operation after receiving network data.Therefore need to consider to reduce data flow to video memory from network interface time loss.The Flip operation is described not only can reduce in single surface according to the present invention, has also reduced the requirement to video memory simultaneously.And, owing to only need a first type surface, describe to compare the data space of having saved a surface with two surfaces, be specially adapted to the little occasions of video memory such as embedded device.
In addition, in this embodiment, use the mechanism described synchronously to replace the asynchronous mechanism of describing.As mentioned above, in the present invention, utilize network-data driving list surface to describe, that is to say, after receiving network data from the second display device, just drive the first display device and carry out screen drawing, this is a kind of mechanism of describing synchronously.The asynchronous mechanism of describing need to rely on message mechanism to notify to describe the carrying out that operates, and therefore depends on the message realization mechanism of operating system.Describe synchronously mechanism and use, when existing screen need to describe, directly describe, and do not rely on the message transmission to inform.Therefore, the regular hour has been saved in synchronous operation.
In addition, in this embodiment, by utilizing the full screen display data trnascription of the cell stores screen of current demonstration on the first display device before the display data on the screen that changes that receives on the second display device in single surperficial drawing apparatus, and after receiving the display data on the screen that changes, at first the full screen display data trnascription of storing is covered processing, then utilize the full screen display data trnascription that covers after processing to draw, only need to do thus and once describe operation, partly describe and to form the phenomenon of mosaic thereby eliminated.
In addition, in this embodiment, utilize the network-data driving screen-refresh.Because sending ending equipment only when screen display content changes, is just understood the transmission of trigger data bag.That is, static picture will not produce effective data packets (effective data packets has referred to comprise the packet of screen frame information), so receiving end does not need to carry out screen-refresh yet.Equally, any effective data packets that receiving end is received shows that all variation has occured the on-screen data frame of sending ending equipment, and correspondingly, the screen of receiving end also needs to refresh.Network data receives and screen-refresh this dependence between the two just, becomes reasonable so that receive the behavior driving screen-refresh of network data.The network-data driving screen-refresh can be avoided unnecessary screen-refresh operation.
In addition, in this embodiment, adjust according to the real surplus buffer size of the impact damper that is used for receive data of described the first display device, thereby it is consistent that the receiving velocity of data is adjusted to the speed of describing with screen, realizes thus rate-matched.
The second embodiment
Figure 10 shows the process flow diagram of screen plotting method according to a second embodiment of the present invention.
As shown in figure 10, at first, in step S1010, receive the screen display content data that send from the second display device by network, the on-screen display (osd) area of described the second display device is a plurality of segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas that changes in the on-screen display (osd) area of the second display device.
After receiving described screen display content data, at step S1020, utilize the corresponding segmented areas in the full screen display content-data copy of storing in the memory storage of screen display content data cover the first display device receive, described full screen display content-data copy be before receiving described screen display content data on the screen of described the first display device the copy of the full frame screen display content data of current demonstration.
After finishing above-mentioned covering processing, at step S1030, obtain the union of all the corresponding segmented areas corresponding with described screen display content data.Then, at step S1040, the screen area that this union is corresponding is plotted on the first type surface of described the first display device and shows that described first type surface is unique display surface that described the first display device obtains.
Figure 11 shows the block diagram of screen drawing apparatus 1100 according to a second embodiment of the present invention.As shown in figure 11, screen drawing apparatus 1100 comprises receiving element 1110, capping unit 1120, storage unit 1130, union acquiring unit 1140 and screen drawing unit 1150.
Receiving element 1110 is used for receiving the screen display content data that send from the second display device by network, the on-screen display (osd) area of described the second display device is a plurality of segmented areas by piecemeal, and the data of the screen display content of the segmented areas that changes in the described screen display content data on-screen display (osd) area that is second display devices.
Union acquiring unit 1140 is used for obtaining the union of all the corresponding segmented areas corresponding with described screen display content data.Screen drawing unit 1150 is used for showing that described first type surface is unique display surface that described the first display device obtains on the first type surface that the screen area that this union is corresponding is plotted to described the first display device.
According to the screen plotting method of the second embodiment, can realize equally the technique effect of the first embodiment.
Although the disclosed content in front shows exemplary embodiment of the present invention, should be noted that under the prerequisite of the scope of the present invention that does not deviate from the claim restriction, can carry out multiple change and modification.Function, step and/or action according to the claim to a method of inventive embodiments described herein do not need to carry out with any particular order.In addition, although element of the present invention can be with individual formal description or requirement, also it is contemplated that a plurality of, unless clearly be restricted to odd number.
Be described although as above described each embodiment according to the present invention with reference to figure, it will be appreciated by those skilled in the art that each embodiment that the invention described above is proposed, can also make various improvement on the basis that does not break away from content of the present invention.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (10)
1. a screen plotting method is used for being implemented in the screen display content that shows on the first display device on the second display device, and described method comprises:
Receive the screen display content data that send from the second display device by network, described screen display content data are data of the screen display content of the screen area that changes in the on-screen display (osd) area of the second display device;
After receiving described screen display content data, utilize the corresponding region in the full screen display content-data copy of storing in the memory storage of screen display content data cover the first display device receive, the full screen display content-data copy of storing in the described memory storage be before receiving described screen display content data on the screen of the first display device the copy of the full frame screen display content data of current demonstration; And
To be plotted to through the full screen display content-data copy that will obtain after cover processing on the first type surface of the first display device and show that described first type surface is unique display surface that described the first display device obtains.
2. screen plotting method as claimed in claim 1, wherein, described screen display content data send when only the screen display content on the second display device changes.
3. screen describing method as claimed in claim 1 wherein, will be plotted to through the full screen display content-data copy that will obtain after the covering processing when showing on the described first type surface, only draw the screen area corresponding with described screen display content data.
4. screen plotting method as claimed in claim 1, wherein, the data transmission rate of described the second display device is adjusted according to the real surplus buffer size of the impact damper that is used for receive data of described the first display device.
5. a screen drawing apparatus is used for being implemented in the display data on the screen that shows on the first display device on the second display device, and described screen drawing apparatus comprises:
Receiving element is used for receiving the screen display content data that send from the second display device by network, and described screen display content data are data of the screen display content of the screen area that changes in the on-screen display (osd) area of the second display device;
Storage unit is used for storage full screen display content-data copy, described full screen display content-data copy be before receiving described screen display content data on described the first display device the copy of the full frame screen display content data of current demonstration;
Capping unit is used for utilizing the corresponding region in the full screen display content-data copy of storing in the described storage unit of screen display content data cover that receives after receiving described screen display content data; And
The screen drawing unit, the full screen display data trnascription after being used for processing through covering is plotted on the described first type surface and shows that described first type surface is unique display surface that described the first display device obtains.
6. screen tracing device as claimed in claim 5, wherein, described screen display content data send when only the screen display on the second display device changes.
7. screen tracing device as claimed in claim 5 wherein, will be plotted to through the full screen display content-data copy that will obtain after the covering processing when showing on the described first type surface, only draw the screen area corresponding with described screen display content data.
8. screen drawing apparatus as claimed in claim 5, wherein, the data transmission rate of described the second display device is adjusted according to the real surplus buffer size of the impact damper that is used for receive data of described the first display device.
9. a screen plotting method is used for being implemented in the screen display content that shows on the first display device on the second display device, and described method comprises:
Receive the screen display content data that send from the second display device by network, the on-screen display (osd) area of described the second display device is a plurality of segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas that changes in the on-screen display (osd) area of the second display device;
After receiving described screen display content data, utilize the corresponding segmented areas in the full screen display content-data copy of storing in the memory storage of screen display content data cover the first display device receive, described full screen display content-data copy be before receiving described screen display content data on the screen of described the first display device the copy of the full frame screen display content data of current demonstration;
Obtain the union of all the corresponding segmented areas corresponding with described screen display content data;
The screen area that this union is corresponding is plotted on the first type surface of described the first display device and shows that described first type surface is unique display surface that described the first display device obtains.
10. a screen drawing apparatus is used for being implemented in the screen display content that shows on the first display device on the second display device, and described screen tracing device comprises:
Receiving element, be used for receiving the screen display content data that send from the second display device by network, the on-screen display (osd) area of described the second display device is a plurality of segmented areas by piecemeal, and the data of the screen display content of the segmented areas that changes in the described screen display content data on-screen display (osd) area that is second display devices;
Storage unit is used for storage full screen display content-data copy, described full screen display content-data copy be before receiving described screen display content data on described the first display device the copy of the full frame screen display content data of current demonstration;
Capping unit is used for utilizing the corresponding segmented areas in the full screen display content-data copy of storing in the described storage unit of screen display content data cover that receives after receiving described screen display content data;
The union acquiring unit is for the union of obtaining all the corresponding segmented areas corresponding with described screen display content data;
The screen drawing unit is used for showing that described first type surface is unique display surface that described the first display device obtains on the first type surface that the screen area that this union is corresponding is plotted to described the first display device.
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| CN102929570B (en) | 2016-01-27 |
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