CN101388107A

CN101388107A - Method for reducing flickering display for embedded browsers

Info

Publication number: CN101388107A
Application number: CNA2008103047860A
Authority: CN
Inventors: 严勇
Original assignee: Sichuan Changhong Electric Co Ltd
Current assignee: Sichuan Changhong Electric Co Ltd
Priority date: 2008-08-01
Filing date: 2008-10-08
Publication date: 2009-03-18
Anticipated expiration: 2028-10-08
Also published as: CN101388107B

Abstract

The invention relates to the computer technique, which solves the weakness of display flicker of embedded browsers and provides a method for reducing display flicker of embedded browsers. The technical scheme comprises that the method for reducing flicker display of embedded browsers is characterized by including the following steps: a, pre-defining a display region in the memory according to the size of a display terminal, b, designing and drawing the memory drawing function at the memory region via combining interface parameters of API of the bottom layer of graphic library of a browser, and corresponding to the drawing API function of the bottom layer to draw a picture part in the memory region, c, completing drawing the picture part, converting the picture in the memory region from internal memory to video memory by the drawing API of the graphic library and then displaying, d, displaying a word part, and performing output display directly via the interface function of the graphic library. The method has the advantages of high displaying efficiency with sound effect and little flicker, which is adaptable to embedded browsers.

Description

A kind of method that reduces flickering display for embedded browsers

Technical field

The present invention relates to computer technology, particularly the technology of built-in browser.

Background technology

As everyone knows, in Embedded facility environment, be subjected to the restriction of hardware condition, browser has almost been dominated all, become unique application software with user interactions, and built-in browser and general desktop browsers have nothing special on function difference, of paramount importance all is nothing but the tissue foundation of DOM (Document Object Model) tree, typesetting engine and display engine, wherein, allowing the user know from experience the most direct and deep should be the part of display engine, and the quality of its display effect and display efficiency will be directly connected to the height of whole browser quality assessment.In embedded limited hardware facility environment, browser is when resolving a webpage, owing to be in video memory, to carry out picture to draw, and video memory is in general all little, if therefore the picture of webpage the inside is many, when particularly network condition is not good, then each pictures is completed and is just shown, the phenomenon of flicker just appears showing very easily, on the technique for displaying principle, originally be unblamable, can be in a single day from user's angle, when using browser to browse EPG (the Electronic Program Guide) web page contents of oneself liking, frequent appearance flicker will allow people's vision accept, add if the display terminal size among the user own home is when bigger, show that the problem of flicker is just even more serious.

Summary of the invention

Technical matters to be solved by this invention exactly in order to solve the shortcoming of above-mentioned flickering display for embedded browsers, provides a kind of method that reduces flickering display for embedded browsers.

The present invention solves its technical matters, and the technical scheme of employing is that a kind of method that reduces flickering display for embedded browsers is characterized in that, may further comprise the steps:

A. according to the size of display terminal, pre-definedly in internal memory go out a viewing area;

B. in conjunction with the interface parameters of browser graphic bottom of the reservior layer API (Application Programming Interface), the internal memory drafting function of region of memory and the drawing API function correspondence of bottom are drawn in design, and the picture part is drawn in region of memory;

C. after finishing the drafting of picture, the picture in the internal memory viewing area is transferred to shape library drawing API carry out the conversion of internal memory, show to video memory;

D. word segment is shown, directly transfer to the shape library interface function and export demonstration;

Further, further comprising the steps of between step b and the step c:

E. set the threshold values that a threshold value is used as filling the internal memory viewing area, and whether decision enters next step according to threshold value;

Further comprising the steps of after the steps d:

F. part had before been failed the picture drawn in internal memory, treat its backstage download finish after, directly transfer to API shape library interface function and be plotted to video memory and show;

Concrete, the described threshold settings standard of step e is the stand-by period or the download rate of download pictures.

The invention has the beneficial effects as follows, can effectively reduce flickering display for embedded browsers, and owing to adopted the thinking of threshold value, also the browser unlike direct demonstration is slow on speed of displaying by above step, display efficiency height, effective, and glitter is few.

Description of drawings

Fig. 1 is the system flowchart of embodiment;

Embodiment

Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.

The invention provides a kind of method that reduces flickering display for embedded browsers, at first according to the size of display terminal, pre-definedly in internal memory go out a viewing area, then in conjunction with the interface parameters of browser graphic bottom of the reservior layer API, design is drawn the internal memory of region of memory and is drawn function, drawing API function correspondence with bottom, the picture part is drawn in region of memory, and after the drafting of finishing picture, picture in the internal memory viewing area is transferred to shape library drawing API carry out the conversion of internal memory to video memory, show, at last word segment is shown, directly transfer to the shape library interface function and export demonstration.

Embodiment

This example provides a kind of method that reduces flickering display for embedded browsers, earlier save as virtual video memory with interior, treat with all pictures to be shown in internal memory, draw populated after, again with the bitmap of this internal memory as one " greatly ", the drawing API that transfers to bottom draws demonstration and gets final product, because network environment is poor sometimes, can not by the time all pictures all be downloaded and show again after getting off to be filled in the internal memory, so original framework in conjunction with the browser display module, the notion that adds threshold value, carry out internal memory filling demonstration earlier with downloading to local picture within most of threshold value, remaining transfer to the I/O module and display module continues to download on the backstage, directly transfer to shape library bottom API then and carry out independent video memory demonstration, its system flowchart such as Fig. 1.

At first according to the size of display terminal, pre-definedly in internal memory go out a viewing area, drawing after being provided with is used, as display terminal size be 640*480 often, be that definable one block size is the region of memory of 640*480, later background colour, background picture, picture are all here filled earlier; In conjunction with the interface parameters of browser graphic bottom of the reservior layer API, oneself design is drawn the internal memory of region of memory and drawn function, and is corresponding one by one with the drawing API function of former bottom, but is noted that using and changing of drawing coordinate; Set the threshold values that a threshold value is used as filling region of memory again, because will take into account display speed simultaneously, so can not wait until all at every turn that all pictures are all populated in internal memory, show output again, choosing according to can be of this threshold value according to the stand-by period, also the download rate that can download according to picture (picture of having downloaded accounts for the ratio of the sum that needs the picture that shows altogether) is carried out; After the drafting of finishing picture, the picture in the internal memory viewing area is transferred to shape library drawing API carry out internal memory and show, and word segment is directly transferred to the shape library interface function export demonstration to the conversion of video memory; Part had before been failed the picture drawn in internal memory, treat its backstage download finish after, directly transfer to the shape library interface function and be plotted to video memory and show.

Claims

[claim 1] a kind of method that reduces flickering display for embedded browsers is characterized in that, may further comprise the steps:

A. according to the size of display terminal, pre-definedly in internal memory go out a viewing area;

B. in conjunction with the interface parameters of browser graphic bottom of the reservior layer API, the internal memory drafting function of region of memory and the drawing API function correspondence of bottom are drawn in design, and the picture part is drawn in region of memory;

C. after finishing the drafting of picture, the picture in the internal memory viewing area is transferred to shape library drawing API carry out the conversion of internal memory, show to video memory;

D. word segment is shown, directly transfer to the shape library interface function and export demonstration.
[claim 2] is characterized in that according to the described a kind of method that reduces flickering display for embedded browsers of claim 1, and be further comprising the steps of between step b and the step c:

E. set the threshold values that a threshold value is used as filling the internal memory viewing area, and whether decision enters next step according to threshold value;

Further comprising the steps of after the steps d:

F. part had before been failed the picture drawn in internal memory, treat its backstage download finish after, directly transfer to API shape library interface function and be plotted to video memory and show.
[claim 3] is characterized in that according to the described a kind of method that reduces flickering display for embedded browsers of claim 2 the described threshold settings standard of step e is the stand-by period.
[claim 4] is characterized in that according to the described a kind of method that reduces flickering display for embedded browsers of claim 2, the download rate that the described threshold settings standard of step e is a download pictures.