[webkit-dev] Event firing and repainting of saved Images in webkit

Myles C. Maxfield mmaxfield at apple.com
Wed Mar 4 06:50:36 PST 2015

You might want to look at how the onLoad JavaScript event gets fired as well as how ImageLoader updates the contents of images as more bytes are downloaded. Investigating how animated gifs cause repaints might also be helpful.

As far as the control of reacting to page load and setting up timers, you might want to investigate doing that part in script, and implementing only the image manipulation algorithm itself in native code.

> On Mar 4, 2015, at 12:44 AM, ankit srivastav <ank.cpp at gmail.com> wrote:
> Hi All,
> We are working on manipulation of images(falling under a certain criteria) on a web page, but the algorithms being used for the purpose are a bit slow.
> So, the idea is to save the images/renderImage objects and continue to render/paint the entire page  and once the page has been loaded/rendered we will trigger an event which will read the saved images one by one, apply the algorithm on them, and then finally repaint them. 
> For this mechanism to work correctly we need :
> 1) An event after the whole page will get rendered.
> 2) A procedure by which we can trigger the repainting of the saved images.
> Will it be possible to achieve this using events? If yes, what could be the possible approach? 
> Thanks and Regards
> Ankit
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