2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
4 * Portions are Copyright (C) 1998 Netscape Communications Corporation.
7 * Robert O'Callahan <roc+@cs.cmu.edu>
8 * David Baron <dbaron@fas.harvard.edu>
9 * Christian Biesinger <cbiesinger@web.de>
10 * Randall Jesup <rjesup@wgate.com>
11 * Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
12 * Josh Soref <timeless@mac.com>
13 * Boris Zbarsky <bzbarsky@mit.edu>
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16 * modify it under the terms of the GNU Lesser General Public
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45 #include "core/rendering/RenderLayerRepainter.h"
47 #include "core/rendering/FilterEffectRenderer.h"
48 #include "core/rendering/RenderLayer.h"
49 #include "core/rendering/RenderView.h"
50 #include "core/rendering/compositing/CompositedLayerMapping.h"
54 RenderLayerRepainter::RenderLayerRepainter(RenderLayerModelObject& renderer)
55 : m_renderer(renderer)
59 void RenderLayerRepainter::computePaintInvalidationRectsIncludingNonCompositingDescendants()
61 // FIXME: boundsRectForPaintInvalidation() has to walk up the parent chain
62 // for every layer to compute the rects. We should make this more efficient.
63 // FIXME: it's wrong to call this when layout is not up-to-date, which we do.
64 m_renderer.setPreviousPaintInvalidationRect(m_renderer.boundsRectForPaintInvalidation(m_renderer.containerForPaintInvalidation()));
65 // FIXME: We are only updating the paint invalidation bounds but not
66 // the positionFromPaintInvalidationContainer. This means that we may
67 // forcing a full invaliation of the new position. Is this really correct?
69 for (RenderLayer* layer = m_renderer.layer()->firstChild(); layer; layer = layer->nextSibling()) {
70 if (layer->compositingState() != PaintsIntoOwnBacking && layer->compositingState() != PaintsIntoGroupedBacking)
71 layer->paintInvalidator().computePaintInvalidationRectsIncludingNonCompositingDescendants();
75 // Since we're only painting non-composited layers, we know that they all share the same repaintContainer.
76 void RenderLayerRepainter::paintInvalidationIncludingNonCompositingDescendants()
78 repaintIncludingNonCompositingDescendantsInternal(m_renderer.containerForPaintInvalidation());
81 void RenderLayerRepainter::repaintIncludingNonCompositingDescendantsInternal(const RenderLayerModelObject* repaintContainer)
83 m_renderer.invalidatePaintUsingContainer(repaintContainer, m_renderer.previousPaintInvalidationRect(), InvalidationLayer);
85 // Disable for reading compositingState() below.
86 DisableCompositingQueryAsserts disabler;
88 for (RenderLayer* curr = m_renderer.layer()->firstChild(); curr; curr = curr->nextSibling()) {
89 if (curr->compositingState() != PaintsIntoOwnBacking && curr->compositingState() != PaintsIntoGroupedBacking)
90 curr->paintInvalidator().repaintIncludingNonCompositingDescendantsInternal(repaintContainer);
94 LayoutRect RenderLayerRepainter::repaintRectIncludingNonCompositingDescendants() const
96 LayoutRect repaintRect = m_renderer.previousPaintInvalidationRect();
98 for (RenderLayer* child = m_renderer.layer()->firstChild(); child; child = child->nextSibling()) {
99 // Don't include repaint rects for composited child layers; they will paint themselves and have a different origin.
100 if (child->compositingState() == PaintsIntoOwnBacking || child->compositingState() == PaintsIntoGroupedBacking)
103 repaintRect.unite(child->paintInvalidator().repaintRectIncludingNonCompositingDescendants());
108 void RenderLayerRepainter::setBackingNeedsRepaintInRect(const LayoutRect& r)
110 // https://bugs.webkit.org/show_bug.cgi?id=61159 describes an unreproducible crash here,
111 // so assert but check that the layer is composited.
112 ASSERT(m_renderer.compositingState() != NotComposited);
113 if (m_renderer.compositingState() == NotComposited) {
114 // If we're trying to repaint the placeholder document layer, propagate the
115 // repaint to the native view system.
116 LayoutRect absRect(r);
118 m_renderer.layer()->convertToLayerCoords(m_renderer.layer()->root(), delta);
119 absRect.moveBy(delta);
121 if (absRect.isEmpty())
124 RenderView* view = m_renderer.view();
126 view->invalidatePaintForRectangle(absRect);
129 // FIXME: generalize accessors to backing GraphicsLayers so that this code is squasphing-agnostic.
130 if (m_renderer.layer()->groupedMapping()) {
131 LayoutRect repaintRect = r;
132 repaintRect.move(m_renderer.layer()->subpixelAccumulation());
133 if (GraphicsLayer* squashingLayer = m_renderer.layer()->groupedMapping()->squashingLayer())
134 squashingLayer->setNeedsDisplayInRect(pixelSnappedIntRect(repaintRect));
136 m_renderer.layer()->compositedLayerMapping()->setContentsNeedDisplayInRect(r);
140 void RenderLayerRepainter::setFilterBackendNeedsRepaintingInRect(const LayoutRect& rect)
144 LayoutRect rectForRepaint = rect;
145 m_renderer.style()->filterOutsets().expandRect(rectForRepaint);
147 ASSERT(m_renderer.layer()->filterInfo());
149 RenderLayer* parentLayer = enclosingFilterRepaintLayer();
151 FloatQuad repaintQuad(rectForRepaint);
152 LayoutRect parentLayerRect = m_renderer.localToContainerQuad(repaintQuad, parentLayer->renderer()).enclosingBoundingBox();
154 if (parentLayerRect.isEmpty())
157 if (parentLayer->hasCompositedLayerMapping()) {
158 parentLayer->paintInvalidator().setBackingNeedsRepaintInRect(parentLayerRect);
162 if (parentLayer->paintsWithFilters()) {
163 parentLayer->paintInvalidator().setFilterBackendNeedsRepaintingInRect(parentLayerRect);
167 if (parentLayer->isRootLayer()) {
168 RenderView* view = toRenderView(parentLayer->renderer());
169 view->invalidatePaintForRectangle(parentLayerRect);
173 ASSERT_NOT_REACHED();
176 RenderLayer* RenderLayerRepainter::enclosingFilterRepaintLayer() const
178 for (const RenderLayer* curr = m_renderer.layer(); curr; curr = curr->parent()) {
179 if ((curr != m_renderer.layer() && curr->requiresFullLayerImageForFilters()) || curr->compositingState() == PaintsIntoOwnBacking || curr->isRootLayer())
180 return const_cast<RenderLayer*>(curr);