Fade effect when switching tabs

[Ben Rockefeller]

Greetings,

I am working with Linux-gtk Chromium and trying to make a change which
would create a fade effect while transitioning from one tab to
another. Currently, webkit paints a white background before loading a
new page and rendering it. Instead of this white background, I want to
create a fade out of the previous tab content image before the now
current tab page is rendered.

Note I dont want to do this in Javascript. The point of the effort is
to make tab transitions on slower embedded systems smoother to the
user. I have looked at cairo alpha APIs but I am not currently sure
where the change should be in chromium sources. Any pointers on what
is the best way to go about this? Much appreciated.

Thanks!

[Brett Wilson]

Painting to the screen happens in
chrome/browser/renderer_host/backing_store and
render_widget_host_view_*

Your change will be challenging because this code has no knowledge of
page transitions and such. Even if it did, it will be difficult to
come up with a good definition of "page transition" to key off of.
Most knowledge of the pages is in
browser/tab_contents/navigation_controller.h

Brett

[Scott Violet]

On Sat, Jan 1, 2011 at 12:32 PM, Ben Rockefeller
<benrock...@gmail.com> wrote:

Take a look at TabContents::FadeForInstant. It fades out the
background. You might be able to use something like this to get the
effect you're after.

-Scott