CN101226549A - Method and device for loading picture resource in embedded system - Google Patents
Method and device for loading picture resource in embedded system Download PDFInfo
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- CN101226549A CN101226549A CNA2008100569021A CN200810056902A CN101226549A CN 101226549 A CN101226549 A CN 101226549A CN A2008100569021 A CNA2008100569021 A CN A2008100569021A CN 200810056902 A CN200810056902 A CN 200810056902A CN 101226549 A CN101226549 A CN 101226549A
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Abstract
The invention discloses a method of picture resource loading in an imbedded system, which comprises: dividing picture resources into small pictures and large pictures according to pictures' resolution or system memory limit; in storing picture resources, storing small pictures data into a memory and storing large picture data into a file system; in loading picture resources, directly loading small picture data from the memory and loading large picture data from the file system. The invention accordingly provides a device for picture resources loading in an imbedded system. The invention realizes picture resources flexible loading and best optimizes picture resources visiting speed and memory cost.
Description
Technical field
The present invention relates to field of computer technology, relate in particular to the method and apparatus that picture resource loads in a kind of embedded system.
Background technology
As everyone knows, the loading of picture resource is a very important ring in the embedded system, and this system mainly contains two kinds of picture resource load modes at present.
First kind of picture resource load mode: picture resource is stored in the internal memory.
It realizes that fundamental mechanism is to convert picture resource to a global structure, wherein comprise picture height, wide, the shared byte number of each pixel, the dot matrix array of each pixel color value of picture etc. is described.When Showing Picture, directly from structure, take out the dot matrix array and just can output to screen.The advantage of this method is that access speed is fast, and interface is simple.But, because image data is directly to be stored in the global variable, so need take certain memory headroom.And photo resolution is high more, and shared memory headroom is just big more.Because the memory headroom of embedded system is limited, when existing in the system simultaneously than the high picture of multiresolution, the shared memory headroom of picture resource will be quite huge, will occur the situation of Installed System Memory insufficient space like this, limited application flexibility.
Second kind of picture resource load mode: picture resource is stored in the file system.
It realizes that fundamental mechanism is that picture resource is stored in the file system, and joins a resource ID for each picture, when needs use this picture, it is loaded into from file system in the internal memory again, and its advantage is to save memory headroom.But,, when only needing to obtain picture height, basic pictorial information such as wide, also need from file system, Load Image data, so this method efficient is lower because read data is compared from internal memory read data and wanted slow many from file system.Also want frequent carry out Memory Allocation and release simultaneously, can cause memory fragmentation.And be to avoid memory fragmentation to need to distribute a fixing space to carry out picture loading and release specially.
In summary, picture resource loading technique in the existing embedded system obviously exists inconvenience and defective, so be necessary to be improved on reality is used.
Summary of the invention
At above-mentioned defective, the object of the present invention is to provide the method and apparatus that picture resource loads in a kind of embedded system, it has realized the flexible loading of picture resource, has optimized the access speed and the memory cost of picture resource the biglyyest.
To achieve these goals, the invention provides the method that picture resource loads in a kind of embedded system, described method comprises:
A, according to the restriction of photo resolution and/or Installed System Memory, picture resource is divided into little picture and big picture;
B, when the picture resource, the image data of little picture is stored in the internal memory, and the image data of big picture is stored in the file system;
C, when Loading Image resource, then directly from internal memory, load the image data of this little picture for little picture, then from file system, load the image data of this big picture for big picture.
The method according to this invention further comprises among the described step B:
B1, during one picture resource, judge the classification of this picture resource earlier in storage, if little picture execution in step B2 then, if big picture execution in step B3 then;
B2, convert the image data of little picture to first bitmap structure and the first dot matrix array, and with this first dot matrix storage of array in internal memory, and be provided with the first dot matrix pointer of a non-NULL in described first bitmap structure, the first dot matrix array in this first dot matrix pointed internal memory;
B3, convert the image data of big picture to second bitmap structure and the second dot matrix array, and with this second dot matrix storage of array in a file system, and be provided with one in described second bitmap structure and put the picture pointer that the second empty dot matrix pointer and points to the picture resource mapping table in this document system, and the mapping relations of this picture pointer and resource ID are added in this picture resource mapping table.
The method according to this invention, described step C further comprises:
C1, then need to load this picture resource during one picture resource in visit, judge earlier whether the dot matrix pointer in the bitmap structure of this picture resource is sky, if for sky then the representative picture resource be little picture and execution in step C2, if sky then the representative picture resource be big picture and execution in step C3;
The first dot matrix pointer access memory in C2, basis first bitmap structure of this little picture directly loads this first dot matrix pointer first dot matrix array pointed from internal memory;
Picture pointer visit picture resource mapping table in second bitmap structure of C3, the big picture of basis loads this second dot matrix array according to this resource ID again to find corresponding resource ID from file system.
The method according to this invention also comprises after the described step C:
D, when the visit of described big picture is finished, the image data from the big picture of this document system loads in the described internal memory is discharged.
The method according to this invention, described step C also comprises the step of visiting basic pictorial information, when visit one picture resource, if only need the basic pictorial information of this picture resource, then directly obtains basic pictorial information from the bitmap structure of described picture resource.
The present invention also provides the device that picture resource loads in a kind of embedded system, and this device comprises:
The picture resource sort module is used for according to photo resolution and/or Installed System Memory restriction picture resource being divided into little picture and big picture;
The picture resource memory module is used for when the picture resource, the image data of little picture is stored in the internal memory, and the image data of big picture is stored in the file system;
The picture resource load-on module is used for when Loading Image resource, for the then direct image data that loads this little picture from internal memory of little picture, then loads the image data of this big picture for big picture from file system.
According to device of the present invention, described picture resource memory module is further used for judging the classification of this picture resource earlier when storage one picture resource:
If little picture, described picture resource memory module then is used for converting the image data of this little picture to first bitmap structure and the first dot matrix array, and with this first dot matrix storage of array in internal memory, and be provided with the first dot matrix pointer of a non-NULL in described first bitmap structure, the first dot matrix array in this first dot matrix pointed internal memory;
If big picture, described picture resource memory module then is used for converting the image data of this big picture to second bitmap structure and the second dot matrix array, and with this second dot matrix storage of array in a file system, and be provided with one in described second bitmap structure and put the picture pointer that the second empty dot matrix pointer and points to the picture resource mapping table in this document system, and the mapping relations of this picture pointer and resource ID are added in this picture resource mapping table.
According to device of the present invention, described picture resource load-on module is further used for loading this picture resource during one picture resource in visit, and judges earlier whether the dot matrix pointer in the bitmap structure of this picture resource is sky:
If this dot matrix pointer non-NULL, described picture resource load-on module then are used for first bitmap structure, the first dot matrix pointer access memory according to this little picture, directly should from internal memory, load this first dot matrix pointer first dot matrix array pointed;
If this dot matrix pointer is empty, described picture resource load-on module then is used for visiting this picture resource mapping table to find corresponding resource ID according to the picture pointer of second bitmap structure of this big picture, loads this second dot matrix array according to this resource ID from this document system again.
According to device of the present invention, described device also comprises the picture resource release module, is used for when the visit of described big picture is finished, and the image data from the big picture of this document system loads in the described internal memory is discharged.
According to device of the present invention, described picture resource load-on module also is used for when visit one picture resource, if only need the basic pictorial information of this picture resource, then directly obtains basic pictorial information from the bitmap structure of described picture resource.
The present invention is by being divided into picture resource big picture and little picture two classes, and it is stored in the image data of little picture in the internal memory, and the image data of big picture is stored in the file system when the picture resource; When Loading Image resource, then directly from internal memory, load its image data for little picture, then from file system, load its image data for big picture.Whereby, the present invention has realized the flexible loading of picture resource, than the mode that all picture resources all is stored in internal memory, can save memory headroom effectively; Mode than all picture resources all being stored in file system then can improve access speed, thereby has optimized the access speed and the memory cost of picture resource the biglyyest.
Description of drawings
Fig. 1 is the structure drawing of device that picture resource loads in the embedded system of the present invention;
Fig. 2 is the mapping relations instance graph of picture pointer of the present invention and picture resource mapping table;
Fig. 3 is the method flow diagram that picture resource loads in the embedded system of the present invention;
Fig. 4 is the method flow diagram that picture resource loads in the preferred embedded system of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Basic thought of the present invention is: the restriction according to what and/or Installed System Memory space of photo resolution is divided into two kinds of situations and considers.For little picture, because its resolution is low, it is little to convert the memory headroom that takies after the dot matrix array to, it directly can be stored in the internal memory in the mode of dot matrix array; And for big picture, because its resolution height, it is big to convert memory headroom shared after the dot matrix array to, therefore it can be stored in the file system, it is read out when needs show again.In addition, handle, visit all picture resources and all preferably realize by bitmap structure in order to realize the unified of interface.
Fig. 1 shows the apparatus structure that picture resource loads in the embedded system of the present invention, and the device 10 that this picture resource loads comprises picture resource sort module 11, picture resource memory module 12, picture resource load-on module 13 at least, wherein:
Picture resource sort module 11 is used for according to photo resolution and/or Installed System Memory restriction picture resource being divided into little picture and big picture.So-called little picture is meant the picture that photo resolution is relatively little and/or the Installed System Memory restriction is few relatively, for example some small icons etc.; So-called big picture is meant the picture that photo resolution is big relatively and/or the Installed System Memory restriction is many relatively, for example some full frame pictures etc.
Picture resource memory module 12 is used for when the picture resource, the image data of little picture is stored in the internal memory, and the image data of big picture is stored in the file system.Wherein, picture resource is stored in first kind of load mode in the internal memory, it realizes that principle is to convert picture resource to bitmap structure and the dot matrix array directly is stored in the internal memory, and described dot matrix array generally is used to describe each pixel color value of picture.When Showing Picture, directly from internal memory, take out the dot matrix array and just can output to screen.The advantage of first kind of load mode is that access speed is fast, and interface is simple; Its shortcoming is to take certain memory headroom.Picture resource is stored in second kind of load mode of file system, it realizes that principle is that picture resource is stored in the file system, and join a resource ID (sign) for each picture, when needs use this picture, again it is loaded in the internal memory from file system.The advantage of second kind of load mode is to save memory headroom; Its shortcoming is that treatment effeciency is lower.
Preferably, described picture resource memory module 12 is further used for judging the classification of this picture resource earlier that when storage one picture resource promptly this picture resource is little picture or big picture:
If little picture, 12 of described picture resource memory modules are used for converting the image data of this little picture to first bitmap structure and the first dot matrix array, and with this first dot matrix storage of array in internal memory, and be provided with the first dot matrix pointer of a non-NULL in described first bitmap structure, the first dot matrix array in this first dot matrix pointed internal memory.
If big picture, 12 of described picture resource memory modules are used for converting the image data of this big picture to second bitmap structure and the second dot matrix array, and with this second dot matrix storage of array in a file system, computer memory for example, and be provided with one in described second bitmap structure and put the picture pointer that the second empty dot matrix pointer and points to the picture resource mapping table in this document system, and the mapping relations of this picture pointer and resource ID are added in this picture resource mapping table.In having access to the picture resource mapping table, during the picture pointer, from file system, read the dot matrix array again.
Picture resource load-on module 13 is used for when Loading Image resource, for the then direct image data that loads this little picture from internal memory of little picture, then loads the image data of this big picture for big picture from file system.Described picture resource load-on module 13 also is used for when visit one picture resource, if only need the basic pictorial information of this picture resource, then directly obtain basic pictorial information from the bitmap structure of described picture resource, described basic picture packets of information contains the height of picture, wide, Transparent color etc.
Preferably, described picture resource load-on module 13 is further used for loading this picture resource during one picture resource in visit, and judges earlier whether the dot matrix pointer in the bitmap structure of this picture resource is sky:
If this dot matrix pointer non-NULL, described picture resource load-on module then are used for first bitmap structure, the first dot matrix pointer access memory according to this little picture, directly should from internal memory, load this first dot matrix pointer first dot matrix array pointed.
If this dot matrix pointer is empty, described picture resource load-on module then is used for visiting this picture resource mapping table to find corresponding resource ID according to the picture pointer of second bitmap structure of this big picture, loads the second dot matrix array according to this resource ID from this document system again.
Fig. 2 shows the mapping relations of picture pointer and picture resource mapping table in one embodiment of the invention, this picture pointer (ptr) 1～N and its corresponding resource ID 1～N are stored in the picture resource mapping table 21, have mapping relations one to one between picture pointer 1～N and the resource ID 1～N.Described picture pointer is visited this picture resource mapping table 21 to inquire about corresponding resource ID.If find that this picture pointer not in picture resource mapping table 21, then turns back to bitmap structure 22 and deals with in addition, this bitmap structure 22 is the second above-mentioned bitmap structure; And if this picture pointer in picture resource mapping table 21, then according to this resource ID from present embodiment, Load Image among the FLASH (flash memory) 23 as file system data, the just second dot matrix array of this big picture.
Described device 10 also can comprise picture resource release module 14, is used for when the visit of described big picture is finished, and the image data from the big picture of this document system loads in the described internal memory is completely discharged, to improve the space and the utilization rate thereof of internal memory.
Fig. 3 shows the method flow that picture resource loads in the embedded system of the present invention, and it is realized by device shown in Figure 1 10, comprises that specifically step has:
Step S301 according to photo resolution and/or Installed System Memory restriction, is divided into little picture and big picture with picture resource.This step realizes by installing 10 picture resource sort module 11.
Step S302 when the picture resource, is stored in the image data of little picture in the internal memory, and the image data of big picture is stored in the file system.This step realizes by installing 10 picture resource memory module 12.
Step S303 when Loading Image resource, for the then direct image data that loads this little picture from internal memory of little picture, then loads the image data of this big picture from file system for big picture.This step realizes by installing 10 picture resource load-on module 13.This step S303 also comprises the step of visiting basic pictorial information, when visit one picture resource, if only need the basic pictorial information of this picture resource, then can directly obtain basic pictorial information from the bitmap structure of described picture resource.
Fig. 4 shows the method flow that picture resource loads in the preferred embedded system of the present invention, and it is also realized by device shown in Figure 1 10, comprises that specifically step has:
Step S401, picture resource sort module 11 is divided into little picture and big picture according to photo resolution and/or Installed System Memory restriction with picture resource.
Step S402, picture resource memory module 12 during one picture resource, is judged the classification of this picture resource in storage earlier, if little picture execution in step S403 then, if big picture execution in step S404 then.
Step S403, picture resource memory module 12 converts the image data of little picture to first bitmap structure and the first dot matrix array, and with this first dot matrix storage of array in internal memory, and be provided with the first dot matrix pointer of a non-NULL in described first bitmap structure, the first dot matrix array in this first dot matrix pointed internal memory.
Step S404, picture resource memory module 12 converts the image data of big picture to second bitmap structure and the second dot matrix array, and with this second dot matrix storage of array in a file system, and be provided with one in described second bitmap structure and put the picture pointer that the second empty dot matrix pointer and points to the picture resource mapping table in this document system, and the mapping relations of this picture pointer and resource ID are added in this picture resource mapping table.
Step S405, when visit one picture resource, then need to load this picture resource, picture resource load-on module 13 judges earlier whether the dot matrix pointer in the bitmap structure of this picture resource is sky, if the dot matrix pointer is not empty, then the representative picture resource is that little picture and image data all are loaded in the internal memory, directly access associated data in internal memory, and execution in step S406; If described dot matrix pointer be a sky, then the representative picture resource is big picture and being stored in the file system of this image data is described, and execution in step S407.
Step S406, picture resource load-on module 13 directly load this first dot matrix pointer first dot matrix array pointed according to the first dot matrix pointer access memory in first bitmap structure of this little picture from internal memory.
Step S407, picture resource load-on module 13 to find corresponding resource ID, loads this second dot matrix array according to this resource ID according to the visit of the picture pointer in second bitmap structure of big picture picture resource mapping table again from file system.That is to say, be that key word mates with the picture pointer in the picture resource mapping table at first, finds out corresponding resource ID, loads the image data of described resource ID correspondence again from file system.
Step S408, when the visit of described big picture was finished, picture resource release module 14 was discharged the image data from the big picture of this document system loads in the described internal memory, to improve memory headroom.
In sum, the present invention is by being divided into picture resource big picture and little picture two classes, and it is stored in the image data of little picture in the internal memory, and the image data of big picture is stored in the file system when the picture resource; When Loading Image resource, then directly from internal memory, load its image data for little picture, then from file system, load its image data for big picture.Whereby, the present invention has realized the flexible loading of picture resource, than the mode that all picture resources all is stored in internal memory, can save memory headroom effectively; Mode than all picture resources all being stored in file system then can improve access speed, thereby has optimized the access speed and the memory cost of picture resource the biglyyest.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. the method that picture resource loads in the embedded system is characterized in that described method comprises:
A, according to the restriction of photo resolution and/or Installed System Memory, picture resource is divided into little picture and big picture;
B, when the picture resource, the image data of little picture is stored in the internal memory, and the image data of big picture is stored in the file system;
C, when Loading Image resource, then directly from internal memory, load the image data of this little picture for little picture, then from file system, load the image data of this big picture for big picture.
2. method according to claim 1 is characterized in that, further comprises among the described step B:
B1, during one picture resource, judge the classification of this picture resource earlier in storage, if little picture execution in step B2 then, if big picture execution in step B3 then;
B2, convert the image data of little picture to first bitmap structure and the first dot matrix array, and with this first dot matrix storage of array in internal memory, and be provided with the first dot matrix pointer of a non-NULL in described first bitmap structure, the first dot matrix array in this first dot matrix pointed internal memory;
B3, convert the image data of big picture to second bitmap structure and the second dot matrix array, and with this second dot matrix storage of array in a file system, and be provided with one in described second bitmap structure and put the picture pointer that the second empty dot matrix pointer and points to the picture resource mapping table in this document system, and the mapping relations of this picture pointer and resource ID are added in this picture resource mapping table.
3. method according to claim 2 is characterized in that, described step C further comprises:
C1, then need to load this picture resource during one picture resource in visit, judge earlier whether the dot matrix pointer in the bitmap structure of this picture resource is sky, if for sky then the representative picture resource be little picture and execution in step C2, if sky then the representative picture resource be big picture and execution in step C3;
The first dot matrix pointer access memory in C2, basis first bitmap structure of this little picture directly loads this first dot matrix pointer first dot matrix array pointed from internal memory;
Picture pointer visit picture resource mapping table in second bitmap structure of C3, the big picture of basis loads this second dot matrix array according to this resource ID again to find corresponding resource ID from file system.
4. method according to claim 3 is characterized in that, also comprises after the described step C:
D, when the visit of described big picture is finished, the image data from the big picture of this document system loads in the described internal memory is discharged.
5. method according to claim 3, it is characterized in that described step C also comprises the step of visiting basic pictorial information, when visit one picture resource, if only need the basic pictorial information of this picture resource, then directly from the bitmap structure of described picture resource, obtain basic pictorial information.
6. the device that picture resource loads in the embedded system is characterized in that this device comprises:
The picture resource sort module is used for according to photo resolution and/or Installed System Memory restriction picture resource being divided into little picture and big picture;
The picture resource memory module is used for when the picture resource, the image data of little picture is stored in the internal memory, and the image data of big picture is stored in the file system;
The picture resource load-on module is used for when Loading Image resource, for the then direct image data that loads this little picture from internal memory of little picture, then loads the image data of this big picture for big picture from file system.
7. device according to claim 6 is characterized in that, described picture resource memory module is further used for judging the classification of this picture resource earlier when storage one picture resource:
If little picture, described picture resource memory module then is used for converting the image data of this little picture to first bitmap structure and the first dot matrix array, and with this first dot matrix storage of array in internal memory, and be provided with the first dot matrix pointer of a non-NULL in described first bitmap structure, the first dot matrix array in this first dot matrix pointed internal memory;
If big picture, described picture resource memory module then is used for converting the image data of this big picture to second bitmap structure and the second dot matrix array, and with this second dot matrix storage of array in a file system, and be provided with one in described second bitmap structure and put the picture pointer that the second empty dot matrix pointer and points to the picture resource mapping table in this document system, and the mapping relations of this picture pointer and resource ID are added in this picture resource mapping table.
8. device according to claim 7 is characterized in that, described picture resource load-on module is further used for loading this picture resource during one picture resource in visit, and judges earlier whether the dot matrix pointer in the bitmap structure of this picture resource is sky:
If this dot matrix pointer non-NULL, described picture resource load-on module then are used for first bitmap structure, the first dot matrix pointer access memory according to this little picture, directly should from internal memory, load this first dot matrix pointer first dot matrix array pointed;
If this dot matrix pointer is empty, described picture resource load-on module then is used for visiting this picture resource mapping table to find corresponding resource ID according to the picture pointer of second bitmap structure of this big picture, loads this second dot matrix array according to this resource ID from this document system again.
9. device according to claim 8 is characterized in that described device also comprises the picture resource release module, is used for when the visit of described big picture is finished, and the image data from the big picture of this document system loads in the described internal memory is discharged.
10. device according to claim 8, it is characterized in that, described picture resource load-on module also is used for when visit one picture resource, if only need the basic pictorial information of this picture resource, then directly obtains basic pictorial information from the bitmap structure of described picture resource.
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| CN200810056902A CN100589104C (en) | 2008-01-25 | 2008-01-25 | Method and device for loading picture resource in embedded system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354660A (en) * | 2008-09-12 | 2009-01-28 | 北京中星微电子有限公司 | Method, apparatus and system for operating embedded software program |
| CN102508892A (en) * | 2011-10-25 | 2012-06-20 | 深圳市万兴软件有限公司 | System and method for quickly previewing pictures |
| CN104267996A (en) * | 2014-09-29 | 2015-01-07 | 广州金山网络科技有限公司 | Image resource processing method, device and terminal |
| CN104602103A (en) * | 2014-12-29 | 2015-05-06 | 深圳创维数字技术有限公司 | Set top box memory distribution method and device |
| CN107656699A (en) * | 2017-08-18 | 2018-02-02 | 上海车音智能科技有限公司 | Picture call method and device |
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2008
- 2008-01-25 CN CN200810056902A patent/CN100589104C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354660A (en) * | 2008-09-12 | 2009-01-28 | 北京中星微电子有限公司 | Method, apparatus and system for operating embedded software program |
| CN102508892A (en) * | 2011-10-25 | 2012-06-20 | 深圳市万兴软件有限公司 | System and method for quickly previewing pictures |
| CN102508892B (en) * | 2011-10-25 | 2014-01-22 | 深圳万兴信息科技股份有限公司 | System and method for quickly previewing pictures |
| CN104267996A (en) * | 2014-09-29 | 2015-01-07 | 广州金山网络科技有限公司 | Image resource processing method, device and terminal |
| CN104602103A (en) * | 2014-12-29 | 2015-05-06 | 深圳创维数字技术有限公司 | Set top box memory distribution method and device |
| CN107656699A (en) * | 2017-08-18 | 2018-02-02 | 上海车音智能科技有限公司 | Picture call method and device |
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|---|---|
| CN100589104C (en) | 2010-02-10 |
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