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df8b0f8a7a
This makes APZ behave nicely with most uses of a css transform:scale.
Summary of changes:
- FrameMetrics::mCumulativeResolution now includes the css-driven resolution
in addition to the pres-shell resolution.
- Displayports are now stored in Screen pixels rather than Layer pixels.
This is what we want anyways (as we'd like the displayport size to remain
constant as a fraction of the screen size), but it was necessary to make
this change as part of this patch because continuing to store them in
Layer pixels in the presence of a css-driven resolution would have
required a bunch of infrastructure to implement correctly.
Remaining work:
- Layout painting a scrollable layer at a resolution different from the
scale induced by the css transform causes problems. These will go away
with bug 1076192.
- Different resolutions on the x and y axes are not supported. This is
tracked by bug 1039967.
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| .. | ||
| apps | ||
| base | ||
| canvas | ||
| core | ||
| css | ||
| devicestorage | ||
| events | ||
| gamepad | ||
| geolocation | ||
| html | ||
| json | ||
| notification | ||
| offline | ||
| permission | ||
| range | ||
| security | ||
| settings | ||
| sidebar | ||
| smil | ||
| storage | ||
| stylesheets | ||
| svg | ||
| traversal | ||
| xbl | ||
| xpath | ||
| xul | ||