Bug 114323 - TileController doesn't remove tiles when the view is resized, leading to stale content
Summary: TileController doesn't remove tiles when the view is resized, leading to stal...
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Tim Horton
Keywords: InRadar
Depends on:
Reported: 2013-04-09 17:12 PDT by Tim Horton
Modified: 2013-04-10 09:31 PDT (History)
3 users (show)

See Also:

patch (3.83 KB, patch)
2013-04-09 18:02 PDT, Tim Horton
simon.fraser: review+
Details | Formatted Diff | Diff

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Description Tim Horton 2013-04-09 17:12:53 PDT
You can see this when browsing around Amazon with Aggressive Tile Retention on:

1. Go to http://www.amazon.com/Best-Sellers-Video-Games-PlayStation-Hardware/zgbs/videogames/14210751/
2. Scroll to the bottom.
3. Click on the next page of results.
4. Scroll to the bottom.
5. Move the mouse around. You'll probably see stale content start repainting.

Comment 1 Tim Horton 2013-04-09 18:02:14 PDT
Created attachment 197194 [details]
Comment 2 Simon Fraser (smfr) 2013-04-09 18:09:18 PDT
Comment on attachment 197194 [details]

View in context: https://bugs.webkit.org/attachment.cgi?id=197194&action=review

> Source/WebCore/platform/graphics/ca/mac/TileController.mm:736
> +            if (it->key.y() < topLeftForBounds.y()
> +                || it->key.y() > bottomRightForBounds.y()
> +                || it->key.x() < topLeftForBounds.x()
> +                || it->key.x() > bottomRightForBounds.x())

Would be cleaner if you copied it->key into a TileIndex variable.
Comment 3 Tim Horton 2013-04-10 09:31:41 PDT