CompositingReasons CompositingReasonFinder::nonStyleDeterminedDirectReasons(const RenderLayer* layer, bool* needToRecomputeCompositingRequirements) const
{
CompositingReasons directReasons = CompositingReasonNone;
RenderObject* renderer = layer->renderer();
if (requiresCompositingForAnimation(renderer))
directReasons |= CompositingReasonActiveAnimation;
if (m_renderView.compositorDrivenAcceleratedScrollingEnabled()) {
if (requiresCompositingForOutOfFlowClipping(layer))
directReasons |= CompositingReasonOutOfFlowClipping;
if (requiresCompositingForOverflowScrollingParent(layer))
directReasons |= CompositingReasonOverflowScrollingParent;
}
if (requiresCompositingForOverflowScrolling(layer))
directReasons |= CompositingReasonOverflowScrollingTouch;
if (requiresCompositingForPosition(renderer, layer, 0, needToRecomputeCompositingRequirements))
directReasons |= renderer->style()->position() == FixedPosition ? CompositingReasonPositionFixed : CompositingReasonPositionSticky;
directReasons |= renderer->additionalCompositingReasons(m_compositingTriggers);
ASSERT(!(directReasons & CompositingReasonComboAllStyleDeterminedReasons));
return directReasons;
}
CompositingReasons CompositingReasonFinder::nonStyleDeterminedDirectReasons(const RenderLayer* layer, bool* needToRecomputeCompositingRequirements) const
{
CompositingReasons directReasons = CompositingReasonNone;
RenderObject* renderer = layer->renderer();
if (hasOverflowScrollTrigger()) {
if (requiresCompositingForOutOfFlowClipping(layer))
directReasons |= CompositingReasonOutOfFlowClipping;
if (requiresCompositingForOverflowScrollingParent(layer))
directReasons |= CompositingReasonOverflowScrollingParent;
}
if (requiresCompositingForOverflowScrolling(layer))
directReasons |= CompositingReasonOverflowScrollingTouch;
if (requiresCompositingForPositionSticky(renderer, layer))
directReasons |= CompositingReasonPositionSticky;
if (requiresCompositingForPositionFixed(renderer, layer, 0, needToRecomputeCompositingRequirements))
directReasons |= CompositingReasonPositionFixed;
directReasons |= renderer->additionalCompositingReasons(m_compositingTriggers);
ASSERT(!(directReasons & CompositingReasonComboAllStyleDeterminedReasons));
return directReasons;
}