nsRect
nsSVGUtils::FindFilterInvalidation(nsIFrame *aFrame, const nsRect& aRect)
{
PRInt32 appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
nsIntRect rect = aRect.ToOutsidePixels(appUnitsPerDevPixel);
while (aFrame) {
if (aFrame->GetStateBits() & NS_STATE_IS_OUTER_SVG)
break;
nsSVGFilterFrame *filter = nsSVGEffects::GetFilterFrame(aFrame);
if (filter) {
// When we are under AttributeChanged, we can no longer get the old bbox
// by calling GetBBox(), and we need that to set up the filter region
// with the correct position. :-(
//rect = filter->GetInvalidationBBox(aFrame, rect);
// XXX [perf] As a horrible workaround, for now we just invalidate the
// entire area of the nearest viewport establishing frame that doesnt
// have overflow:visible. See bug 463939.
nsSVGDisplayContainerFrame* viewportFrame = GetNearestSVGViewport(aFrame);
while (viewportFrame && !viewportFrame->GetStyleDisplay()->IsScrollableOverflow()) {
viewportFrame = GetNearestSVGViewport(viewportFrame);
}
if (!viewportFrame) {
viewportFrame = GetOuterSVGFrame(aFrame);
}
if (viewportFrame->GetType() == nsGkAtoms::svgOuterSVGFrame) {
nsRect r = viewportFrame->GetVisualOverflowRect();
// GetOverflowRect is relative to our border box, but we need it
// relative to our content box.
r.MoveBy(viewportFrame->GetPosition() - viewportFrame->GetContentRect().TopLeft());
return r;
}
NS_ASSERTION(viewportFrame->GetType() == nsGkAtoms::svgInnerSVGFrame,
"Wrong frame type");
nsSVGInnerSVGFrame* innerSvg = do_QueryFrame(static_cast<nsIFrame*>(viewportFrame));
nsSVGDisplayContainerFrame* innerSvgParent = do_QueryFrame(viewportFrame->GetParent());
float x, y, width, height;
static_cast<nsSVGSVGElement*>(innerSvg->GetContent())->
GetAnimatedLengthValues(&x, &y, &width, &height, nsnull);
gfxRect bounds = nsSVGUtils::GetCanvasTM(innerSvgParent).
TransformBounds(gfxRect(x, y, width, height));
bounds.RoundOut();
nsIntRect r;
if (gfxUtils::GfxRectToIntRect(bounds, &r)) {
rect = r;
} else {
NS_NOTREACHED("Not going to invalidate the correct area");
}
aFrame = viewportFrame;
}
aFrame = aFrame->GetParent();
}
nsRect r = rect.ToAppUnits(appUnitsPerDevPixel);
if (aFrame) {
NS_ASSERTION(aFrame->GetStateBits() & NS_STATE_IS_OUTER_SVG,
"outer SVG frame expected");
r.MoveBy(aFrame->GetContentRect().TopLeft() - aFrame->GetPosition());
}
return r;
}
