STR: 1. Load about:addons 2. Scroll the page with a mouse wheel or trackpad RESULT: The list of addons disappeared, but the rest of the page is still visible. This bug also affects the "Edit Page" textarea of wiki.mozilla.org but Wikipedia: https://wiki.mozilla.org/index.php?title=Firefox&action=edit https://en.wikipedia.org/w/index.php?title=Firefox&action=edit This bug look like another regression from OSX texture bug 900133. This is a regression in Nightly build 2013-08-21. I bisected the TBPL builds from mozilla-inbound from the prior day and the regression range is includes bug 900133: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=0f68b32be429&tochange=252dbb41d609

We get a cairo error on smaller strides and cairo refuses to draw our mask.

This works around some weird Quartz bugs with A8 surfaces. Previously we just manually cleared these surfaces instead (see the #ifdef XP_MACOSX in ISurfaceAllocator.cpp), but I think this makes more sense.

Comment on attachment 794448 [details] [diff] [review] Align strides to at least 4 Review of attachment 794448 [details] [diff] [review]: ----------------------------------------------------------------- ::: gfx/layers/ImageDataSerializer.cpp @@ +73,5 @@ > gfx::SurfaceFormat aFormat) > { > // Note that at the moment we pack the image data with the minimum possible > // stride, we may decide to change that if we want aligned stride. > + uint32_t bufsize = aSize.height * ComputeStride(aFormat, aSize.width); please remove the comment above now that we have an aligned stride.

> please remove the comment above now that we have an aligned stride. Actually never mind, it is Saturday for Matt so I fixed the comment and will land as soon as inbound reopens

https://hg.mozilla.org/integration/mozilla-inbound/rev/c61fe8e1f887 https://hg.mozilla.org/integration/mozilla-inbound/rev/aed22a2d8353

Backed out for Linux and OSX reftest failures. https://hg.mozilla.org/integration/mozilla-inbound/rev/76a5ca209147 https://tbpl.mozilla.org/php/getParsedLog.php?id=26934249&tree=Mozilla-Inbound

Just relanding the first part, since the latter caused a bunch of fuzz failures. https://hg.mozilla.org/integration/mozilla-inbound/rev/8358b10c9b4f