CN110148391A - A kind of method and terminal device avoiding image display tearing - Google Patents
A kind of method and terminal device avoiding image display tearing Download PDFInfo
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- CN110148391A CN110148391A CN201910249749.2A CN201910249749A CN110148391A CN 110148391 A CN110148391 A CN 110148391A CN 201910249749 A CN201910249749 A CN 201910249749A CN 110148391 A CN110148391 A CN 110148391A
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- 238000001514 detection method Methods 0.000 claims 3
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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Abstract
In order to solve the problems, such as that the image that manual mode updates shows tearing, the embodiment of the invention provides a kind of methods for avoiding image display tearing, and the generation of tearing problem can be shown to avoid image, improves display effect and user experience.Under the manual mode that display parameters update, service update shadow register is interrupted with vertical blanking area to user's request and does mutual exclusion processing to two independent behaviors of the display register currently to come into force, system performance is influenced smaller, it ensure that the concurrent safety that user's request is interrupted with vertical blanking area, it avoids image from showing the generation of tearing problem, improves image display effect and user experience.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of method and terminal device for avoiding image display tearing.
Background technique
On the more embedded real-time device of display parameters configuration, nothing is possible within the period in a vertical blanking area
Method completes all configurations in time.Such as graphic user interface, the size of each figure layer, color data are changing all the time.
It is temporarily first to be buffered in shadow register, as what when of shadow register when user updates display register at any time
Wait to update and arrive the display register currently to come into force, at present there are two types of renewal model, respectively automatically and manually mode.First to certainly
Dynamic model formula explains: in the previous short time of vertical blanking end of extent, viewing hardware automatic trigger shadow register is updated to working as
Before the display register that comes into force；Followed by manual mode (software program operation register is needed to update), usage mode is vertical
In blanking zone interrupt service subroutine, as long as operation updates the position of coming into force of shadow register, display controller obtains newest
Display parameters, then display will show new image frame data at once, it is specific as shown in Figure 1.
Traditional display parameters update under manual mode operation, are vertical blanking interrupt section updates at any time
To the display register currently to come into force, operation does not guarantee that whether the display parameters of user have updated and finishes shadow register,
Therefore can have certain probability causes new picture frame display parameters not right.Such as the display parameters of user's request at this time are more
New half, vertical blanking area interrupt service and just generate the enabled shadow register that updates to the display register currently to come into force, then
The phenomenon that it is not right to will lead to new picture frame display parameters, causes image display tearing, display effect is poor.
Summary of the invention
In order to solve the problems, such as that the image that manual mode updates shows tearing, the embodiment of the invention provides one kind to avoid image
The method for showing tearing can show the generation of tearing problem to avoid image, improve display effect and user experience.
To achieve the above object, the technical scheme is that
A method of image display tearing is avoided, operational order is updated to request and vertical blanking area interrupts service and updates
Mutual exclusion processing is done on shadow register to two independent behaviors of the display register currently to come into force.
Compared with prior art, the present invention the beneficial effect is that:
Under the manual mode that display parameters update, service is interrupted with vertical blanking area to user's request and updates shadow deposit
Device does mutual exclusion processing to two independent behaviors of the display register currently to come into force, smaller on system performance influence, ensure that user
The concurrent safety that request is interrupted with vertical blanking area avoids image from showing the generation of tearing problem, improves image display effect
And user experience.
Detailed description of the invention
Fig. 1 is the schematic diagram that a kind of image display parameters update；
Fig. 2 is that user requests to update the flow chart of shadow register；
Fig. 3 is that the flow chart for servicing and updating shadow register to the display register that currently comes into force is interrupted in vertical blanking area；
Fig. 4 is the schematic diagram of the terminal device provided in an embodiment of the present invention for avoiding image display tearing.
Specific embodiment
The contents of the present invention are described in further details with reference to the accompanying drawings and detailed description.
" interrupting service in vertical blanking area " described herein specifically refers to: the complete image scanning signals of a width, by water
The separated row signal sequence of flat blanking interval is constituted, a referred to as frame.After scanning element scans through a frame, to be returned from the lower right corner of image
The upper left corner of image is returned to, the scanning of a new frame is started, this time interval is called vertical blanking, and hardware does this signal
The generation behavior of interruption is exactly to enter vertically in terms of software respective so will generate hardware interrupts when vertical blanking arrives
Blanking zone interrupts service to execute specific task.
Embodiment one:
Aiming at the problem that traditional display parameters update the existing image display tearing under manual mode operation, this implementation
Example provides a kind of method for avoiding image display tearing, specifically includes that, first to start viewing hardware initialization, initialization is used
Family request interrupts the mutual exclusion lock (hereinafter referred to as mutual exclusion lock) of service with vertical blanking area and updates shadow register mark and more
New the currently active display register mark, the mode that configuration display parameters update perform image display for manual mode, and first,
During service execution is interrupted in vertical blanking area, other places cannot have the place of operation viewing hardware register, otherwise can exist
Show the risk probability of tearing.Second, during non-perpendicular blanking zone interrupts service execution, in operation viewing hardware register
When, it is ensured that service is interrupted in vertical blanking area cannot update on shadow register to the display register currently to come into force.Also
It is to say, by using double mutual exclusion Processing Algorithms, under the manual mode that display parameters update, to user's request and vertical blanking
Area interrupts and does mutual exclusion processing on service update shadow register to two independent behaviors of the display register currently to come into force, to system
Performance influence is smaller, ensure that the concurrent safety that user's request is interrupted with vertical blanking area, image is avoided to show tearing problem
Occur, improves image display effect and user experience.
Specifically, as shown in fig.2, user requests the process for updating shadow register to include the following steps:
201, user requests to update a frame image data, finishes it in all display parameters that user updates new image frame
Before, it is ensured that service is interrupted in vertical blanking area cannot update shadow register to the display register currently to come into force.User can
The early stage condition for updating all display parameters of new image frame seeks to obtain mutual exclusion lock, otherwise recycles always until obtaining mutual exclusion
After lock, and updates shadow register mark and meet condition and could update all display parameters of new image frame；
202, after user's request to mutual exclusion lock, but this when of vertical blanking area interrupts service and may also update
During shadow register to the display register currently to come into force, so also needing to add condition judgement: vertical blanking area again
The service of interruption updates whether shadow register is completed to the display register currently to come into force, does not complete such as, then circulation is sentenced always
It is disconnected to be such as completed until completing, then enter next link；
203, after the completion of above, update shadow register mark can be added 1 operation, shadow will be updated behind user by, which indicating, posts
Storage, service is interrupted in vertical blanking area cannot update on shadow register to the display register currently to come into force；
204, mutual exclusion lock can be discharged to this current step, reduces the control range of lock, avoids the granularity of mutual exclusion lock
It is excessive；Due to releasing mutual exclusion lock, service is interrupted in vertical blanking area can obtain mutual exclusion lock, but due to updating shadow register mark
Have plus 1 operation, that is to say, that be greater than 0, so vertical blanking area interrupts service and do not update shadow register still to working as previous existence
The display register of effect.
205, at this time can safety update shadow register, even if vertical blanking area interrupt produce because update shadow
Sub- register flag is greater than 0, so shadow register will not be updated to the display register currently to come into force；
206, after the completion of above, the operation that subtracts 1 of update shadow register mark, indicate that user has completed to update shadow and post
The operation of storage, vertical blanking area interrupt to service available mutual exclusion lock at this time and update shadow register and show to what is currently come into force
Show register.That is, during vertical blanking area interruption service execution can be entered.
Specifically, as shown in fig.3, during interrupting service execution into vertical blanking area, then enter following steps:
301, service is interrupted in vertical blanking area can obtain mutual exclusion lock, then enters next link；Otherwise it abandons this and interrupts clothes
Business processing；
302, judge that user requests to update whether new display frame parameter is completed, is such as completed, that is to say, that update shadow
Register flag is equal to 0, then enters next link；Otherwise it abandons this and interrupts service processing；
303, after the completion of above, add 1 operation the display register mark currently to come into force is updated, indicate mutual exclusion lock quilt at present
Vertical blanking area interrupts service and temporarily occupies, and user's request does not update shadow register temporarily.It interrupts and takes in vertical blanking area
Before business updates shadow register to the display register currently to come into force, it ensure that user requests all displays of more new image frame
Parameter is completed；
304, mutual exclusion lock can be discharged to this current step, reduces the control range of lock, avoids the granularity of mutual exclusion lock
It is excessive.Because updating the display register mark currently to come into force is greater than 1, user's request is also not update shadow deposit
Device；
305, update shadow register that at this time can be safe is to the display register currently to come into force, even if there is user at this time
Request, and shadow register is not updated, also it is avoided that leading to the problem of image display tearing；
306, after the completion of above, the operation that subtracts 1 of the display register mark that currently comes into force is updated, indicate in vertical blanking area
Disconnected service has been completed to update the operation of shadow register to the display register currently to come into force, if user has new display at this time
The request that frame parameter updates, is available mutual exclusion lock and updates shadow register, so that will not interrupt to vertical blanking area
The operation that service updates shadow register to the display register currently to come into force impacts, that is, avoids generation image and show
The problem of showing tearing.
Embodiment two
Corresponding to the method for avoiding image display tearing described in foregoing embodiments one, Fig. 4 shows the embodiment of the present invention
What is provided avoids the running environment schematic diagram of image display tearing program.For ease of description, it illustrates only and the present embodiment phase
The part of pass.
Fig. 4 is the schematic diagram of the terminal device provided in an embodiment of the present invention for avoiding image display tearing.As shown in figure 4,
The terminal device 40 for avoiding image display tearing of the present embodiment includes: processor 400, memory 401 and is stored in described
In memory 401 and the computer program 402 that can run on the processor 400, such as avoid image display tearing program.
The processor 400 realizes the step in above-described embodiment one, such as step shown in Fig. 2 when executing the computer program 402
Rapid 201 to 206 and step 301-306 shown in Fig. 3.
Illustratively, the computer program 402 can be divided into one or more modules, one or more of
Module is stored in the memory 401, and is executed by the processor 400, to complete the present invention.It is one or more of
Module can be the series of computation machine program instruction section that can complete specific function, and the instruction segment is for describing the computer
Implementation procedure of the program 402 in the terminal device 40 for avoiding image display tearing.
The terminal device 40 for avoiding image display tearing may include, but be not limited only to, processor 400, memory
401.It will be understood by those skilled in the art that Fig. 4 is only the example for avoiding the terminal device 40 of image display tearing, not structure
The restriction for avoiding the terminal device 30 of image display tearing in pairs, may include than illustrating more or fewer components or group
Certain components or different components are closed, such as the terminal device 40 for avoiding image display tearing can also include input
Output equipment, network access equipment, bus etc..
Alleged processor 400 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array
(FieldProgrammable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor are patrolled
Collect device, discrete hardware components etc..General processor can be microprocessor or the processor be also possible to it is any conventional
Processor etc..
The memory 401 can be the internal storage unit of the terminal device 40 for avoiding image display tearing, example
Such as avoid the hard disk or memory of the terminal device 40 of image display tearing.The memory 301 avoids image described in being also possible to
It shows the External memory equipment of the terminal device 40 of tearing, such as is equipped on the terminal device 40 for avoiding image display tearing
Plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (SecureDigital, SD) card, dodge
Deposit card (Flash Card) etc..Further, the memory 401 can also both include the end for avoiding image display tearing
The internal storage unit of end equipment 40 also includes External memory equipment.The memory 401 is for storing the computer program
402 and it is described avoid image display tearing terminal device 30 needed for other programs and data.The memory 401 may be used also
For temporarily storing the data that has exported or will export.
Those of ordinary skill in the art may be aware that each exemplary algorithm described in conjunction with the examples disclosed in this document
Step can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions actually with hardware also
It is software mode to execute, the specific application and design constraint depending on technical solution.Professional technician can be to every
A specific application uses different methods to achieve the described function, but this realizes it is not considered that beyond of the invention
Range.
The present invention realizes all or part of the process in above-described embodiment method, can also be instructed by computer program
Relevant hardware is completed, and the computer program can be stored in a computer readable storage medium, the computer program
When being executed by processor, it can be achieved that the step of above-mentioned each embodiment of the method.Wherein, the computer program includes calculating
Machine program code, the computer program code can for source code form, object identification code form, executable file or it is certain in
Between form etc..The computer-readable medium may include: any entity or dress that can carry the computer program code
It sets, recording medium, USB flash disk, mobile hard disk, magnetic disk, CD, computer storage, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, RandomAccess Memory), electric carrier signal, telecommunication signal and software point
Send out medium etc..It should be noted that the computer-readable medium include content can according in jurisdiction legislation and
The requirement of patent practice carries out increase and decrease appropriate, such as in certain jurisdictions, can according to legislation and patent practice, computer
Reading medium does not include electric carrier signal and telecommunication signal.
Simply to illustrate that technical concepts and features of the invention, its purpose is allows in the art above-described embodiment
Those of ordinary skill cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent changes or modifications that the essence of content according to the present invention is made, should be covered by the scope of protection of the present invention.
Claims (8)
1. a kind of method for avoiding image display tearing, which is characterized in that updated in operational order and vertical blanking area to request
Disconnected service, which updates, does mutual exclusion processing on shadow register to two independent behaviors of the display register currently to come into force.
2. as described in claim 1 avoid image display tearing method, which is characterized in that it is described do mutual exclusion processing include:
During non-perpendicular blanking zone interrupts service execution, when request updates the shadow register of display, vertical blanking area
The service of interruption cannot update on the shadow register to the display register currently to come into force of display；
During service execution is interrupted in vertical blanking area, the shadow register currently shown, which cannot receive request and update to operate, to be referred to
It enables.
3. avoiding the method for image display tearing as claimed in claim 2, which is characterized in that described in non-perpendicular blanking zone
During disconnected service execution, when request updates the shadow register of display, service is interrupted in vertical blanking area cannot update display
Shadow register to the display register currently to come into force on include:
201, acquisition request updates a frame image data operational order
202, detection judges whether to get mutual exclusion lock, recycles always until obtaining mutual exclusion lock；After getting mutual exclusion lock, detection is sentenced
Disconnected vertical blanking area interrupts service and updates whether shadow register is completed to the display register currently to come into force, and circulation is sentenced always
Break until completing；
203, after the completion of vertical blanking area interrupts and updates shadow register to the display register currently to come into force, update shadow
Register flag adds 1 operation, so that service is interrupted in vertical blanking area cannot update shadow register to the display currently to come into force
On register.
4. avoiding the method for image display tearing as claimed in claim 3, which is characterized in that further include:
204, mutual exclusion lock is discharged；
205, shadow register is updated；
206, the operation that subtracts 1 of update shadow register mark, so that service available mutual exclusion at this time is interrupted in vertical blanking area
During lock interrupts service execution entering vertical blanking area, and shadow register is updated to the display register currently to come into force.
5. avoiding the method for image display tearing as claimed in claim 4, which is characterized in that described to be interrupted in vertical blanking area
During service execution, the shadow register currently shown cannot receive request update operational order and include:
301, detection judges that vertical blanking area interrupts whether service gets mutual exclusion lock, if getting, enters next step；It is no
It then abandons this and interrupts service processing；
302, judge that request updates whether new display frame parameter operational order is completed, and is such as completed, then enter next step；It is no
It then abandons this and interrupts service processing；
303, after the completion of above, add 1 operation the display register mark currently to come into force is updated, to indicate that mutual exclusion lock is hung down at present
Straight blanking zone, which interrupts service, temporarily to be occupied, and request operational order does not update shadow register temporarily.
6. avoiding the method for image display tearing as claimed in claim 5, which is characterized in that
304, mutual exclusion lock is discharged；
305, shadow register is updated to the display register currently to come into force；
306, above to complete, the display register mark currently to come into force the operation that subtracts 1 is updated, to indicate that clothes are interrupted in vertical blanking area
Business has been completed to update the operation of shadow register to the display register currently to come into force.
7. a kind of terminal device for avoiding image display tearing, including memory, processor and storage are in the memory
And the computer program that can be run on the processor, which is characterized in that when the processor executes the computer program
Realize any method and step of claim 1-6.
8. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In method and step of the realization as described in claim 1-6 is any when the computer program is executed by processor.
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Cited By (4)
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| CN113052749A (en) * | 2021-03-02 | 2021-06-29 | 长沙景嘉微电子股份有限公司 | Video display method and graphics processor |
| CN113066450A (en) * | 2021-03-16 | 2021-07-02 | 长沙景嘉微电子股份有限公司 | Image display method, device, electronic equipment and storage medium |
| CN114005395A (en) * | 2021-10-11 | 2022-02-01 | 珠海亿智电子科技有限公司 | Image real-time display fault-tolerant system, method and chip |
| CN115113931A (en) * | 2022-07-22 | 2022-09-27 | 瀚博半导体(上海)有限公司 | Data processing system, method, artificial intelligence chip, electronic device and medium |
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