539276 - white grid-lines during fuzzy zoom out

Status: RESOLVED INVALID

(Firefox for Android Graveyard :: Panning/Zooming, defect)

Description

[Madhava Enros [:madhava]]

When zooming out with the latest as of 2010-01-12, if I have an image on the screen, I get some white grid lines during the fuzzy portion of the zoom.

Example: http://www.flickr.com/photos/madhava_work/4269688214/
another: http://www.flickr.com/photos/madhava_work/4269759016/in/photostream/

Comment 1

[Aakash Desai [:aakashd]]

Yep, here's a steps to reproduce:

1. Go to www.slashdot.org/
2. Double-tap on the title of an entry there to zoom in
3. Double-tap again on the screen

Actual Results:
White grid lines will show up after the initial zoom out and before the rest of the tiles are updated.

Comment 2

[Brad Lassey [:blassey] (use needinfo?)]

Attachment: patch to overpaint

not sure how I feel about this.

Comment 3

[Brad Lassey [:blassey] (use needinfo?)]

Attachment: patch to double buffer

I like this patch a lot better.  The downside is it adds another canvas.

Comment 4

[Brad Lassey [:blassey] (use needinfo?)]

a third option which doesn't require the second canvas but only fixes us for zooming in (which is the case where the lines are more obvious due to them being bigger).

http://people.mozilla.org/~blassey/patches/white-lines-half-n-half.patch

Comment 5

[Aakash Desai [:aakashd]]

I'm not seeing this anymore and I can't find a bug about this being fixed. Mark or Matt, would you have any idea if we have one? If not, we can move this to WFM.

Comment 6

[Brad Lassey [:blassey] (use needinfo?)]

Comment on attachment 421478 [details] [diff] [review]
patch to double buffer

we don't want this patch anymore

Comment 7

[Brad Lassey [:blassey] (use needinfo?)]

bug 437957 changed how this works entirely, resolving as fixed

Comment 8

[Aakash Desai [:aakashd]]

This is more an invalid bug rather than fixed because bug 437957 changed the approach entirely.