CN102929570B - Screen describing method and device - Google Patents
Screen describing method and device Download PDFInfo
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- CN102929570B CN102929570B CN201210364763.5A CN201210364763A CN102929570B CN 102929570 B CN102929570 B CN 102929570B CN 201210364763 A CN201210364763 A CN 201210364763A CN 102929570 B CN102929570 B CN 102929570B
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Abstract
The invention provides a kind of screen plotting method, for realizing the screen display content shown on the first display device on the second display device, described method comprises: the screen display content data sent from the second display device by network reception, and described screen display content data are data of the screen display content of the screen area changed in the on-screen display (osd) area of the second display device; Utilize the corresponding region in the full screen display content-data copy stored in the memory storage of screen display content data cover first display device received; And the first type surface full screen display content-data copy obtained after Mulching treatment being plotted to the first display device shows.Utilize method of the present invention, the requirement to video memory can be reduced, decrease the operations such as the Flip in description process, avoid occurring that between two surface, the problem of coupling coordinated by picture needs simultaneously.
Description
Technical field
The present invention relates to screen mirror image technology, more specifically, relate to a kind of screen describing method and device.
Background technology
Screen mirror image technology refers to the technology being transferred to by the screen display content of certain equipment (such as, smart mobile phone) and another equipment (as PC) carrying out show.Fig. 1 shows the schematic diagram of an application of screen mirror image technology.As shown in Figure 1, the display that the screen display content on smart mobile phone can be transferred to PC by WiFi shows.
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, first, device A obtains screen display content and is encapsulated as packet.Then, by Internet Transmission (wireless transmission and/or wire transmission, normally wireless transmission), by the data packet transmission after encapsulation to equipment B.Then, after equipment B receives packet, process is unpacked to received packet, and describe on the display screen of equipment B and screen content shown on display device A.
According to different platforms, realizing of each step above-mentioned is different.In order to improve description performance, " description " step of carrying out on device B is general by carrying out describing to realize based on DirectDraw under windows platform.In the prior art, in order to realize animation effect, the general Flip mode that adopts is described.The principle of work of Flip is similar to the display process of cinefilm.Every one page of film is a static picture.When these films are switched fast and rendered on screen successively, just create animation.Flip utilizes this principle to show animation just.Specifically, Flip plotting method mainly relies on continuous switching between two surfaces to show animation.Common way is: apply for two surfaces (Surface), and one is first type surface (PrimarySurface), and this content stored on the surface is the content that the screen of device A shows; Another is secondary surface (BackSurface), as a surface for subsequent use of first type surface.By constantly upgrading the content of secondary surface, and and first type surface carry out switching and tell on, as shown in Figure 3.
Fig. 4 shows the schematic diagram that Flip describes process.As shown in Figure 4, in step S410, after equipment B is by network reception to the packet transmitted from device A, process is unpacked to received packet.By the data copy that obtains after unpacking process to secondary surface (step S420), then screen updates notice is sent to windowing function (step S430).After sending screen updates notice, network-side proceeds to step S470, waits for new network data.Windowing function, after receiving screen updates notice (step S440), calls Flip function, secondary surface is switched to foreground (step S450), becomes first type surface and be presented on screen.Then, in step S460, windowing 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 to stash, and this completes the transition from a frame to another frame.Whole description process as shown in Figure 4.
But there is following problems in the plotting method of above-mentioned employing Flip mode.
First, this plotting method adopts the asynchronous description pattern of Effect-based operation notice, increases the expense of description process, can not tackle the occasion that performance requirement is strict.In asynchronous description pattern; in order to protect the context environmental of description process; need when entering description process to lock; need when exiting description process to unlock; latching operation belongs to the operation of read/write memory; compared to general CPU operates, need to spend more time of nearly 300 times of expense, this slow speed operation is inapplicable for the strict occasion of this performance requirement of description fast.
Secondly, in this plotting method, two surfaces are adopted to carry out rotation.In this case, there will be problem when screen only there occurs part change.As shown in Figure 5.Supposing in device A will display frame A, frame B and frame C successively, and wherein frame A compares with frame B, and whole picture there occurs change, and frame B compares with frame C and only changed a small region, the pink region namely in figure.The moment 1 time, device A display frame A, and by frame A by Internet Transmission to equipment B, equipment B is copied to secondary surface after receiving frame A, and then send screen updates request, whole process is as shown in Figure 5 a.The moment 2 time, equipment B there occurs major-minor surface and has switched, and the secondary surface of previous moment is switched to first type surface, and is presented on screen.Now, the positive display frame B of device A, and frame B is transferred to equipment B, equipment B is copied to secondary surface after receiving data, as shown in Figure 5 b.The moment 3 time, equally, the major-minor surface of equipment B there occurs switching, and secondary surface originally becomes present first type surface and is presented on screen.Now, the screen of device A only has sub-fraction to there occurs change, and in order to save the network bandwidth, device A only sends the region that there occurs change, the pink region namely in figure.Equipment B, after receiving this region, is transferred to secondary surface, as shown in Figure 5 c.Like this, the moment 4 time, the content in secondary surface will be shown on screen, as fig 5d.As can be seen here, the frame C in device A is transferred to display after in equipment B, has become the combination of frame A and pink region of variation, has occurred mistake.
In addition, in above-mentioned plotting method, call Flip function to switch two surfaces, the effect of this function is the switching carrying out major-minor surface.This switching needs to consume the regular hour.In addition, when picture localized variation, still need the switching carrying out whole surface, also result in certain wasting of resources.
Summary of the invention
In view of above-mentioned, the object of the present invention is to provide the surperficial plotting method of a kind of list of network-data driving and device, it after receiving network data, can use synchronization mechanism on single surface, realize two and shows the screen mirror image between arranging.
According to an aspect of the present invention, provide a kind of screen plotting method, for realizing the screen display content shown on the first display device on the second display device, described method comprises: the screen display content data sent from the second display device by network reception, and described screen display content data are data of the screen display content of the screen area changed 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 stored in the memory storage of screen display content data cover first display device received, the full screen display content-data copy stored in described memory storage is the copy of the full frame screen display content data of current display on the screen of the first display device before receiving described screen display content data; And the first type surface full screen display content-data copy obtained after Mulching treatment being plotted to the first display device shows, described first type surface is unique display surface that described first display device obtains.
In one or more examples in above-mentioned, send when the screen display content of described screen display content data only on the second display device changes.
In one or more examples in above-mentioned, the full screen display content-data copy obtained is plotted to when described first type surface shows, only draws the screen area corresponding with described screen display content data after Mulching treatment.
In one or more examples in above-mentioned, the data transmission rate of described second display device adjusts according to the real surplus buffer size of the impact damper for receiving data of described first display device.
According to a further aspect in the invention, provide a kind of screen drawing apparatus, for realizing the display data on the screen shown on the first display device on the second display device, described screen drawing apparatus comprises: receiving element, for the screen display content data sent from the second display device by network reception, described screen display content data are data of the screen display content of the screen area changed in the on-screen display (osd) area of the second display device; Storage unit, for storing full screen display content-data copy, described full screen display content-data copy is the copy of the full frame screen display content data of current display on described first display device before receiving described screen display content data; Capping unit, for after receiving described screen display content data, the corresponding region in the full screen display content-data copy stored in storage unit described in the screen display content data cover that utilization receives; And screen drawing unit, show for being plotted on described first type surface by the full screen display data trnascription after Mulching treatment, described first type surface is unique display surface that described first display device obtains.
In one or more examples in above-mentioned, send when the screen display of described screen display content data only on the second display device changes.
In one or more examples in above-mentioned, the full screen display content-data copy obtained is plotted to when described first type surface shows, only draws the screen area corresponding with described screen display content data after Mulching treatment.
In one or more examples in above-mentioned, the data transmission rate of described second display device adjusts according to the real surplus buffer size of the impact damper for receiving data of described first display device.
According to a further aspect in the invention, provide a kind of screen plotting method, for realizing the screen display content shown on the first display device on the second display device, described method comprises: the screen display content data sent from the second display device by network reception, the on-screen display (osd) area of described second display device is multiple segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas changed 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 stored in the memory storage of screen display content data cover first display device received, described full screen display content-data copy is the copy of the full frame screen display content data of current display on the screen of described first display device before receiving described screen display content data; Obtain the union of all corresponding segmented areas corresponding with described screen display content data; And first type surface screen area corresponding for this union being plotted to described first display device shows, described first type surface is unique display surface that described first display device obtains.
According to a further aspect in the invention, provide a kind of screen drawing apparatus, for realizing the screen display content shown on the first display device on the second display device, described screen tracing device comprises: receiving element, for the screen display content data sent from the second display device by network reception, the on-screen display (osd) area of described second display device is multiple segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas changed in the on-screen display (osd) area of the second display device; Storage unit, for storing full screen display content-data copy, described full screen display content-data copy is the copy of the full frame screen display content data of current display on described first display device before receiving described screen display content data; Capping unit, for after receiving described screen display content data, the corresponding segmented areas in the full screen display content-data copy stored in storage unit described in the screen display content data cover that utilization receives; Union acquiring unit, for obtaining the union of all corresponding segmented areas corresponding with described screen display content data; And screen drawing unit, show on first type surface screen area corresponding for this union being plotted to described first display device, described first type surface is unique display surface that described first display device obtains.
Utilize the surperficial plotting method of above-mentioned list and device, by utilizing single surface to describe, can be reduced the requirement to video memory, decreasing the operations such as the Flip in description process, avoid picture between two surface needs to coordinate the problem of coupling simultaneously.
In addition, in the present invention, adopt network-driven directly to describe, avoid using message trigger, simplify description flow process, decrease the dependence to operating system message mechanism.
In addition, in the present invention, by the full screen display data trnascription of the screen of current display before be stored in the display data on the screen that receives and change in the memory storage of the first display device, and after receiving the display data on the screen changed, the display data on the screen utilizing this to change covers the corresponding region of the full screen display data trnascription stored, then the full screen display data trnascription after covering is plotted in the first type surface of the first display device, single surface can be avoided to describe to occur the phenomenon of mosaic.
In order to realize above-mentioned and relevant object, will describe in detail and the feature particularly pointed out in the claims after one or more aspect of the present invention comprises.Explanation below and accompanying drawing describe some illustrative aspects of the present invention in detail.But what these aspects indicated is only some modes that can use in the various modes of principle of the present invention.In addition, the present invention is intended to comprise all these aspects and their equivalent.
Accompanying drawing explanation
According to following detailed description of carrying out with reference to accompanying drawing, above and other object of the present invention, feature and advantage will become more apparent.In the accompanying drawings:
Fig. 1 shows the schematic 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 schematic diagram of the continuous handoff procedure between two surfaces in Flip plotting method;
Fig. 4 shows the schematic diagram that Flip describes process;
Fig. 5 A-5D illustrates the design sketch of each process when a screen generating portion changes in Flip describing method;
Fig. 6 shows the process flow diagram of the screen plotting method according to the first embodiment of the present invention;
Fig. 7 A shows schematic diagram when not carry out mosaic Processing for removing when transmitting terminal only sends the region changed;
Fig. 7 B shows schematic diagram when to carry out mosaic Processing for removing when transmitting terminal only sends the region changed;
Fig. 8 shows by regulating the value of iSCSI receiving end window size to regulate transmitting terminal to send the process flow diagram of the speed of data;
Fig. 9 shows the block diagram of the screen drawing apparatus according to 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.
Label identical in all of the figs indicates similar or corresponding feature or function.
Embodiment
Various aspects of the present disclosure are described below.It is to be understood that instruction herein can with varied form imbody, and in this article disclosed any concrete structure, function or both be only representational.Based on instruction herein, those skilled in the art are it is to be understood that an aspect disclosed herein can realize independent of any other side, and the two or more aspects in these aspects can combine according to various mode.Such as, aspect, implement device or the hands-on approach of any number described in this paper can be used.In addition, other structure, function or except one or more aspect described in this paper or be not the 26S Proteasome Structure and Function of one or more aspect described in this paper can be used, realize this device or put into practice this method.In addition, any aspect described herein can comprise at least one element of claim.
Below with reference to Fig. 6 to Figure 11, each embodiment of the present invention is described.
First embodiment
Fig. 6 shows the process flow diagram according to the surperficial plotting method of the list of the network-data driving of the first embodiment of the present invention, the method is for realizing the display data on the screen shown on the first display device on the second display device, and the method is performed by the first display device.
As shown in Figure 6, in step S610, the display data on the screen sent from the second display device by network reception.Here, described screen display content data are data of the screen display content of the screen area changed 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, in step S620, after receiving described screen display content data, utilize the corresponding region in the full screen display content-data copy stored in the memory storage of screen display content data cover first display device received, the full screen display content-data copy stored in described memory storage is the copy of the full frame screen display content data of current display on the screen of the first display device before receiving described screen display content data.If the full frame screen display content data of current display are updated on the screen of the first display device, then the copy stored in memory storage also will upgrade.
Then, in step S630, the first type surface full screen display content-data copy obtained being plotted to the first display device shows, thus show the display data on the screen on the second display device after Mulching treatment on the first display device.Described first type surface is unique display surface that the first display device obtains.
When screen change scope is very little, in order to save bandwidth, transmitting terminal (that is, the second display device) only can send the region changed, and like this, just likely receives a lot of little rectangle belonging to same frame at receiving end (that is, the first display device).
In this case, if receive a little rectangle namely to describe at every turn, then describe the impact of process by network rate, add that description process is a process very fast, then will occur that some update area refreshes, and other update area have little time brush news.This processing mode is also referred to as the processing mode of not carrying out mosaic Processing for removing.Fig. 7 A shows schematic diagram when not carry out mosaic Processing for removing when transmitting terminal only sends the region changed.As shown in Figure 7 A, when changing in the region 1 in device A (that is, the second display device), region 2, region 3, region 4 and region 5, equipment B (that is, the first display device) only depicts region 1 and region 2.
And in processing procedure shown in Figure 6, to draw on the first display device and after showing full screen display data, in the memory storage of the first display device, to retain a copy (hereinafter referred to full screen display data trnascription) of these full screen display data completing.Like this, after receiving the multiple update area display data on the screens sent from the second display device, no matter be once receive simultaneously or repeatedly receive, all after receiving update area display data on the screen, the update area display data on the screen received is utilized to cover the respective regions of full screen display data trnascription.Such as, when once receiving simultaneously, by all data covers on respective regions.When repeatedly receiving, when receiving update area display data on the screen, all received renewal display data on the screen is covered on the full screen display data trnascription obtained after Mulching treatment last time at every turn.Such as, when receiving first update area display data on the screen, this first update area display data on the screen is covered on the full screen display data trnascription stored in the storage device, thus obtains the full screen display data trnascription after first time Mulching treatment.When receiving second update area display data on the screen, this second display data on the screen is covered after first time Mulching treatment to full screen display data trnascription on.The like, until complete the covering of all update area display data on the screens, obtain the full screen display data trnascription of all renewals thus.Like this, only need once to describe operation, just can be implemented in the display data on the screen the first display device shown on the second display device, thus eliminate the phenomenon that part describes will form mosaic.
Fig. 7 B shows schematic diagram when to carry out mosaic Processing for removing when transmitting terminal only sends the region changed.When changing in the region 1 in device A (that is, the second display device), region 2, region 3, region 4 and region 5, equipment B (that is, the first display device) depicts whole full screen display data.
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 is only exemplary, instead of restrictive.Various modification can also be carried out to the first embodiment.
In a modification of this embodiment, send when the screen display of described display data on the screen only on described second display device changes.
In another modification of this embodiment, the full screen display obtained after Mulching treatment content-data copy is plotted to described first type surface shows time, only draw the screen area corresponding with described screen display content data.
In addition, in another modification of this embodiment, the network data that can be through packing process from the display data on the screen of the second display device transmission comprises.In this case, screen plotting method according to the present invention can also comprise: after receiving described network packet, unpack process to received network packet, to obtain the display data on the screen on the second display device.
In addition, in another modification of this embodiment, when utilizing network-data driving screen to describe, if the description operation on the first display device does not complete, then the first display device can not read new data from network-side.In this case, the data transmission rate of described second display device can adjust according to the real surplus buffer size of the impact damper for receiving data of described first display device.
Fig. 8 shows by regulating the value of iSCSI receiving end window size to regulate transmitting terminal to send the process flow diagram of the speed of data, and namely described iSCSI receiving end window size is the real surplus buffer size of the impact damper for receiving data of the first display device.Such as, suppose at a time, the first display device is in screen and describes the stage, does not now read data from network side.When network data arrives 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 Transmission Control Protocol that " window size " data bit is to notify transmitting terminal, and the value of window size represents the number of the data volume that buffer zone can also receive.
As can be seen from Figure 8, data are not removed, 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.Until receiving end description has operated, meshwork buffering district data taken away, then receiving end has again new cushion space to may be used for receiving data.Therefore, the window size of receiving end renewal oneself, the data volume that notice transmitting terminal oneself can receive, like this, transmitting terminal starts again to send data to receiving end.Thus, by tcp window size adjustment mechanism, the receiving velocity of data can be adjusted to consistent with the speed that screen is described, thus realize rate-matched.
Fig. 9 shows the block diagram of the screen drawing apparatus 900 according to 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.
The screen display content data of receiving element 910 for being sent from the second display device by network reception, described screen display content data are data of the screen display content of the screen area changed in the on-screen display (osd) area of the second display device.
Storage unit 930 is for storing full screen display content-data copy, and described full screen display content-data copy is the copy of the full frame screen display content data of current display on described first display device before receiving described screen display content data.
Capping unit 920, for after receiving described screen display content data, utilizes the corresponding region in the full screen display content-data copy stored in storage unit described in the screen display content data cover that receives.
Screen drawing unit 940 shows for being plotted on described first type surface by the full screen display data trnascription after Mulching treatment, and described first type surface is unique display surface that described first display device obtains.
In addition, in other embodiments of the invention, modification can also be carried out to screen drawing apparatus 900.Such as, when the display data on the screen sent from the second display device is through the network packet of packing process, described screen drawing apparatus can also comprise unwrapper unit (not shown), for after receiving described network packet, process is unpacked to received network packet, to obtain the display data on the screen on the second display device.
In a first embodiment in accordance with the invention, utilize and synchronously describe the asynchronous description mechanism of mechanism replacement, reduce Message Transmission, description process need prevents the extra consumption such as competition, improve description performance.And only use a surface to describe, avoid and use two surface to describe the problem brought.Finally, synchronously describe mechanism owing to adopting, make network side can the speed of perception depicting speed, sent the speed of data by tcp window size adjustment mechanism adjustment transmitting terminal, thus coupling describes speed and network transmission speed.
In this embodiment, single surface is used to describe.The method ceaselessly does to redraw covering work fast on same one page.Two surface also needs constantly to redraw overlapping operation, only this operation is put into secondary surface and carries out, and after waiting the preliminary work of secondary surface to carry out, more whole page is switched to foreground display.When redrawing speed and being very fast, this working mechanism that two surface is described just seems very burdensome.And when the source of description data is network-side, for description speed, the speed of Internet Transmission is general slower.Meanwhile, the time delay shown again after Internet Transmission to make screen content is minimum, should carry out description operation immediately after receiving network data.Therefore need to consider to reduce data flow to video memory time loss from network interface.Single surface according to the present invention is described not only to reduce Flip operation, also reduces the requirement to video memory simultaneously.And, owing to only needing a first type surface, save a surperficial data space compared with describing with two surface, be specially adapted to the occasion that the video memorys such as embedded device are little.
In addition, in this embodiment, synchronous mechanism of describing is used to replace asynchronous description mechanism.As mentioned above, in the present invention, utilize network-data driving list surface to describe, that is, after receiving network data from the second display device, just drive the first display device to carry out screen drawing, this is that one synchronously describes mechanism.Asynchronous description mechanism needs to rely on message mechanism to notify the carrying out that description operates, and therefore depends on the message realization mechanism of operating system.And mechanism is synchronously described in use, directly describe when there is screen description and needing, and do not rely on Message Transmission to inform.Therefore, synchronous operation saves the regular hour.
In addition, in this embodiment, by utilizing the full screen display data trnascription of the cell stores screen of current display on the first display device before receiving the display data on the screen changed on the second display device in single surperficial drawing apparatus, and after receiving the display data on the screen changed, first Mulching treatment is carried out to stored full screen display data trnascription, then the full screen display data trnascription after Mulching treatment is utilized to draw, only need to do thus once to describe operation, thus eliminate part and describe to form the phenomenon of mosaic.
In addition, in this embodiment, network-data driving screen-refresh is utilized.Because sending ending equipment is only when screen display content changes, the just transmission of meeting trigger data bag.That is, static picture will not produce effective data packets (effective data packets refers to the packet containing screen frame information), and therefore receiving end does not need to carry out screen-refresh yet.Equally, any effective data packets that receiving end receives, all shows that the on-screen data frame of sending ending equipment there occurs change, and correspondingly, the screen of receiving end also needs to refresh.Network data receives and screen-refresh this dependence between the two just, makes the behavior receiving network data drive screen-refresh to become reasonable.Network-data driving screen-refresh can avoid unnecessary screen-refresh operation.
In addition, in this embodiment, the real surplus buffer size according to the impact damper for receiving data of described first display device adjusts, thus is adjusted to by the receiving velocity of data consistent with the speed that screen is described, and realizes rate-matched thus.
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, first, in step S1010, by the screen display content data that network reception sends from the second display device, the on-screen display (osd) area of described second display device is multiple segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas changed in the on-screen display (osd) area of the second display device.
After receiving described screen display content data, in step S1020, utilize the corresponding segmented areas in the full screen display content-data copy stored in the memory storage of screen display content data cover first display device received, described full screen display content-data copy is the copy of the full frame screen display content data of current display on the screen of described first display device before receiving described screen display content data.
After completing above-mentioned Mulching treatment, in step S1030, obtain the union of all corresponding segmented areas corresponding with described screen display content data.Then, in step S1040, first type surface screen area corresponding for this union being plotted to described first display device shows, described first type surface is unique display surface that described 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.
The screen display content data of receiving element 1110 for being sent from the second display device by network reception, the on-screen display (osd) area of described second display device is multiple segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas changed in the on-screen display (osd) area of the second display device.
Storage unit 1130 is for storing full screen display content-data copy, and described full screen display content-data copy is the copy of the full frame screen display content data of current display on described first display device before receiving described screen display content data.Capping unit 1120, for after receiving described screen display content data, utilizes the corresponding segmented areas in the full screen display content-data copy stored in storage unit described in the screen display content data cover that receives.
Union acquiring unit 1140 is for obtaining the union of all corresponding segmented areas corresponding with described screen display content data.Screen drawing unit 1150 shows on first type surface screen area corresponding for this union being plotted to described first display device, and described first type surface is unique display surface that described first display device obtains.
According to the screen plotting method of the second embodiment, the technique effect of the first embodiment can be realized equally.
Although disclosed content shows exemplary embodiment of the present invention above, it should be noted that under the prerequisite not deviating from the scope of the present invention that claim limits, can multiple change and amendment be carried out.Need not perform with any particular order according to the function of the claim to a method of inventive embodiments described herein, step and/or action.In addition, although element of the present invention can describe or requirement with individual form, also it is contemplated that multiple, is odd number unless explicitly limited.
Although describe each embodiment according to the present invention above with reference to figure to be described, it will be appreciated by those skilled in the art that each embodiment that the invention described above is proposed, various improvement can also be made on the basis not departing from content of the present invention.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (8)
1. a screen plotting method, for realizing the screen display content shown on the first display device on the second display device, described method comprises:
By the screen display content data that network reception sends from the second display device, described screen display content data are data of the screen display content of the screen area changed in the on-screen display (osd) area of the second display device, wherein, the data transmission rate of described second display device adjusts according to the real surplus buffer size of the impact damper for receiving data of described first display device;
After receiving described screen display content data, utilize the corresponding region in the full screen display content-data copy stored in the memory storage of screen display content data cover first display device received, the full screen display content-data copy stored in described memory storage is the copy of the full frame screen display content data of current display on the screen of the first display device before receiving described screen display content data, wherein, if the full frame screen display content data of current display are updated on the screen of described first display device, the copy then stored in memory storage also will upgrade, and
The first type surface full screen display content-data copy obtained after Mulching treatment being plotted to the first display device shows, and described first type surface is unique display surface that described first display device obtains.
2. screen plotting method as claimed in claim 1, wherein, sends when the screen display content of described screen display content data only on the second display device changes.
3. screen plotting method as claimed in claim 1, wherein, is plotted to the full screen display content-data copy obtained after Mulching treatment when described first type surface shows, only draws the screen area corresponding with described screen display content data.
4. a screen drawing apparatus, for realizing the display data on the screen shown on the first display device on the second display device, described screen drawing apparatus comprises:
Receiving element, for the screen display content data sent from the second display device by network reception, described screen display content data are data of the screen display content of the screen area changed in the on-screen display (osd) area of the second display device, wherein, the data transmission rate of described second display device adjusts according to the real surplus buffer size of the impact damper for receiving data of described first display device;
Storage unit, for storing full screen display content-data copy, described full screen display content-data copy is the copy of the full frame screen display content data of current display on described first display device before receiving described screen display content data;
Capping unit, for after receiving described screen display content data, corresponding region in the full screen display content-data copy stored in storage unit described in the screen display content data cover that utilization receives, wherein, if the full frame screen display content data of current display are updated on the screen of described first display device, then the copy stored in memory storage also will upgrade; And
Screen drawing unit, shows for being plotted on first type surface by the full screen display data trnascription after Mulching treatment, and described first type surface is unique display surface that described first display device obtains.
5. screen drawing apparatus as claimed in claim 4, wherein, sends when the screen display of described screen display content data only on the second display device changes.
6. screen drawing apparatus as claimed in claim 4, wherein, is plotted to the full screen display content-data copy obtained after Mulching treatment when described first type surface shows, only draws the screen area corresponding with described screen display content data.
7. a screen plotting method, for realizing the screen display content shown on the first display device on the second display device, described method comprises:
By the screen display content data that network reception sends from the second display device, the on-screen display (osd) area of described second display device is multiple segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas changed in the on-screen display (osd) area of the second display device, wherein, the data transmission rate of described second display device adjusts according to the real surplus buffer size of the impact damper for receiving data of described first display device;
After receiving described screen display content data, utilize the corresponding segmented areas in the full screen display content-data copy stored in the memory storage of screen display content data cover first display device received, described full screen display content-data copy is the copy of the full frame screen display content data of current display on the screen of described first display device before receiving described screen display content data, wherein, if the full frame screen display content data of current display are updated on the screen of described first display device, the copy then stored in memory storage also will upgrade,
Obtain the union of all corresponding segmented areas corresponding with described screen display content data;
First type surface screen area corresponding for this union being plotted to described first display device shows, and described first type surface is unique display surface that described first display device obtains.
8. a screen drawing apparatus, for realizing the screen display content shown on the first display device on the second display device, described screen drawing apparatus comprises:
Receiving element, for the screen display content data sent from the second display device by network reception, the on-screen display (osd) area of described second display device is multiple segmented areas by piecemeal, and described screen display content data are data of the screen display content of the segmented areas changed in the on-screen display (osd) area of the second display device, wherein, the data transmission rate of described second display device adjusts according to the real surplus buffer size of the impact damper for receiving data of described first display device;
Storage unit, for storing full screen display content-data copy, described full screen display content-data copy is the copy of the full frame screen display content data of current display on described first display device before receiving described screen display content data;
Capping unit, for after receiving described screen display content data, corresponding segmented areas in the full screen display content-data copy stored in storage unit described in the screen display content data cover that utilization receives, wherein, if the full frame screen display content data of current display are updated on the screen of described first display device, then the copy stored in memory storage also will upgrade;
Union acquiring unit, for obtaining the union of all corresponding segmented areas corresponding with described screen display content data;
Screen drawing unit, shows on first type surface screen area corresponding for this union being plotted to described first display device, and described first type surface is unique display surface that described first display device obtains.
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| CN104394387A (en) * | 2014-12-09 | 2015-03-04 | 中国电子科技集团公司第五十四研究所 | Multi-channel image display method supporting video superposition for ground control station of unmanned aerial vehicle |
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