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Bug 1231972 - Document how the apz.fling_friction pref is used. r=kats. DONTBUILD for comment change

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extra : source : 740993b673df97ac590b5bc481bacefc634919a6
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Botond Ballo 2015-12-11 11:50:52 -05:00
parent 23a4ed497e
commit b60060e864
1 changed files with 5 additions and 2 deletions
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7
gfx/layers/apz/src/AsyncPanZoomController.cpp
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@ -194,8 +194,11 @@ using mozilla::gfx::PointTyped;
* http://mxr.mozilla.org/mozilla-central/source/layout/style/nsStyleStruct.cpp?rev=21282be9ad95#2462
*
* \li\b apz.fling_friction
* Amount of friction applied during flings.
*
* Amount of friction applied during flings. This is used in the following
* formula: v(t1) = v(t0) * (1 - f)^(t1 - t0), where v(t1) is the velocity
* for a new sample, v(t0) is the velocity at the previous sample, f is the
* value of this pref, and (t1 - t0) is the amount of time, in milliseconds,
* that has elapsed between the two samples.
*
* \li\b apz.fling_repaint_interval
* Maximum amount of time flinging before sending a viewport change. This will