void GraphicsLayerClutter::flushCompositingStateForThisLayerOnly()
{
float pageScaleFactor;
FloatPoint offset = computePositionRelativeToBase(pageScaleFactor);
commitLayerChangesBeforeSublayers(pageScaleFactor, offset);
commitLayerChangesAfterSublayers();
}
void CoordinatedGraphicsLayer::computePixelAlignment(FloatPoint& position, FloatSize& size, FloatPoint3D& anchorPoint, FloatSize& alignmentOffset)
{
if (isIntegral(effectiveContentsScale())) {
position = m_position;
size = m_size;
anchorPoint = m_anchorPoint;
alignmentOffset = FloatSize();
return;
}
FloatPoint positionRelativeToBase = computePositionRelativeToBase();
FloatRect baseRelativeBounds(positionRelativeToBase, m_size);
FloatRect scaledBounds = baseRelativeBounds;
// Scale by the effective scale factor to compute the screen-relative bounds.
scaledBounds.scale(effectiveContentsScale());
// Round to integer boundaries.
// NOTE: When using enclosingIntRect (as mac) it will have different sizes depending on position.
FloatRect alignedBounds = enclosingIntRect(scaledBounds);
// Convert back to layer coordinates.
alignedBounds.scale(1 / effectiveContentsScale());
// Convert back to layer coordinates.
alignmentOffset = baseRelativeBounds.location() - alignedBounds.location();
position = m_position - alignmentOffset;
size = alignedBounds.size();
// Now we have to compute a new anchor point which compensates for rounding.
float anchorPointX = m_anchorPoint.x();
float anchorPointY = m_anchorPoint.y();
if (alignedBounds.width())
anchorPointX = (baseRelativeBounds.width() * anchorPointX + alignmentOffset.width()) / alignedBounds.width();
if (alignedBounds.height())
anchorPointY = (baseRelativeBounds.height() * anchorPointY + alignmentOffset.height()) / alignedBounds.height();
anchorPoint = FloatPoint3D(anchorPointX, anchorPointY, m_anchorPoint.z() * effectiveContentsScale());
}
