diff options
| -rw-r--r-- | WebCore/rendering/RenderLayerCompositor.cpp | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/WebCore/rendering/RenderLayerCompositor.cpp b/WebCore/rendering/RenderLayerCompositor.cpp index 22118fe..8621c1e 100644 --- a/WebCore/rendering/RenderLayerCompositor.cpp +++ b/WebCore/rendering/RenderLayerCompositor.cpp @@ -462,6 +462,13 @@ bool RenderLayerCompositor::overlapsCompositedLayers(OverlapMap& overlapMap, con return false; } +#if ENABLE(COMPOSITED_FIXED_ELEMENTS) +static bool needsCompositingForFixedLayer(const RenderLayer* layer) +{ + return layer->isFixed() && layer->width() > 0 && layer->height() > 0; +} +#endif + // Recurse through the layers in z-index and overflow order (which is equivalent to painting order) // For the z-order children of a compositing layer: // If a child layers has a compositing layer, then all subsequent layers must @@ -505,7 +512,7 @@ void RenderLayerCompositor::computeCompositingRequirements(RenderLayer* layer, O #if ENABLE(COMPOSITED_FIXED_ELEMENTS) // If we are a fixed layer, signal it to our siblings - if (layer->isFixed()) + if (needsCompositingForFixedLayer(layer)) compositingState.m_fixedSibling = true; if (!willBeComposited && compositingState.m_fixedSibling) @@ -547,7 +554,7 @@ void RenderLayerCompositor::computeCompositingRequirements(RenderLayer* layer, O // subsequent siblings as we do for the normal flow // and positive z-order. for (size_t j = 0; j < listSize; ++j) { - if ((negZOrderList->at(j))->isFixed()) { + if (needsCompositingForFixedLayer(negZOrderList->at(j))) { childState.m_fixedSibling = true; break; } @@ -974,7 +981,7 @@ bool RenderLayerCompositor::needsToBeComposited(const RenderLayer* layer) const // if an ancestor is fixed positioned, we need to be composited... const RenderLayer* currLayer = layer; while ((currLayer = currLayer->parent())) { - if (currLayer->isComposited() && currLayer->isFixed()) + if (currLayer->isComposited() && needsCompositingForFixedLayer(currLayer)) return true; } #endif |