diff options
Diffstat (limited to 'components/script/dom/document.rs')
| -rw-r--r-- | components/script/dom/document.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/components/script/dom/document.rs b/components/script/dom/document.rs index da3b5db052c..2015a2f919a 100644 --- a/components/script/dom/document.rs +++ b/components/script/dom/document.rs @@ -1596,6 +1596,22 @@ impl Document { ReflowQueryType::NoQuery, ReflowReason::RequestAnimationFrame); + if spurious && !was_faking_animation_frames { + // If the rAF callbacks did not mutate the DOM, then the + // reflow call above means that layout will not be invoked, + // and therefore no new frame will be sent to the compositor. + // If this happens, the compositor will not tick the animation + // and the next rAF will never be called! When this happens + // for several frames, then the spurious rAF detection below + // will kick in and use a timer to tick the callbacks. However, + // for the interim frames where we are deciding whether this rAF + // is considered spurious, we need to ensure that the layout + // and compositor *do* tick the animation. + self.window.force_reflow(ReflowGoal::ForDisplay, + ReflowQueryType::NoQuery, + ReflowReason::RequestAnimationFrame); + } + // Only send the animation change state message after running any callbacks. // This means that if the animation callback adds a new callback for // the next frame (which is the common case), we won't send a NoAnimationCallbacksPresent |