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* Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
* Copyright (C) 2013 Intel Corporation. All rights reserved.
* Portions are Copyright (C) 1998 Netscape Communications Corporation.
* Other contributors:
* Robert O'Callahan <>
* David Baron <>
* Christian Biesinger <>
* Randall Jesup <>
* Roland Mainz <>
* Josh Soref <>
* Boris Zbarsky <>
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Alternatively, the contents of this file may be used under the terms
* of either the Mozilla Public License Version 1.1, found at
* (the "MPL") or the GNU General Public
* License Version 2.0, found at
* (the "GPL"), in which case the provisions of the MPL or the GPL are
* applicable instead of those above. If you wish to allow use of your
* version of this file only under the terms of one of those two
* licenses (the MPL or the GPL) and not to allow others to use your
* version of this file under the LGPL, indicate your decision by
* deletingthe provisions above and replace them with the notice and
* other provisions required by the MPL or the GPL, as the case may be.
* If you do not delete the provisions above, a recipient may use your
* version of this file under any of the LGPL, the MPL or the GPL.
#ifndef RenderLayerRepainter_h
#define RenderLayerRepainter_h
#include "platform/geometry/LayoutRect.h"
#include "wtf/Noncopyable.h"
namespace WebCore {
enum RepaintStatus {
NeedsNormalRepaint = 0,
NeedsFullRepaint = 1 << 0,
NeedsFullRepaintForPositionedMovementLayout = 1 << 1
class RenderGeometryMap;
class RenderLayer;
class RenderLayerModelObject;
class RenderLayerRepainter {
// Return a cached repaint rect, computed relative to the layer renderer's containerForRepaint.
LayoutRect repaintRect() const { return m_repaintRect; }
LayoutRect repaintRectIncludingNonCompositingDescendants() const;
void repaintAfterLayout(RenderGeometryMap*, bool shouldCheckForRepaint);
void repaintIncludingNonCompositingDescendants(RenderLayerModelObject* repaintContainer);
void repaintIncludingDescendants();
void setRepaintStatus(RepaintStatus status) { m_repaintStatus = status; }
void computeRepaintRects(const RenderLayerModelObject* repaintContainer, const RenderGeometryMap* = 0);
void computeRepaintRectsIncludingDescendants();
// Indicate that the layer contents need to be repainted. Only has an effect
// if layer compositing is being used,
void setBackingNeedsRepaint();
void setBackingNeedsRepaintInRect(const LayoutRect&); // r is in the coordinate space of the layer's render object
void setFilterBackendNeedsRepaintingInRect(const LayoutRect&);
bool shouldRepaintAfterLayout() const;
void clearRepaintRects();
RenderLayer* enclosingFilterRepaintLayer() const;
RenderLayerModelObject* m_renderer;
unsigned m_repaintStatus; // RepaintStatus
LayoutRect m_repaintRect; // Cached repaint rects. Used by layout.
LayoutRect m_outlineBox;
} // namespace WebCore
#endif // RenderLayerRepainter_h