third_party/WebKit/Source/core/paint/PaintLayerPaintingInfo.h

/*
 * 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 <roc+@cs.cmu.edu>
 *   David Baron <dbaron@fas.harvard.edu>
 *   Christian Biesinger <cbiesinger@web.de>
 *   Randall Jesup <rjesup@wgate.com>
 *   Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
 *   Josh Soref <timeless@mac.com>
 *   Boris Zbarsky <bzbarsky@mit.edu>
 *
 * 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
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * 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
 * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
 * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
 * (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 PaintLayerPaintingInfo_h
#define PaintLayerPaintingInfo_h

#include "core/paint/PaintPhase.h"
#include "platform/geometry/LayoutRect.h"
#include "wtf/Allocator.h"

namespace blink {

class PaintLayer;
class LayoutObject;

enum PaintLayerFlag {
  PaintLayerNoFlag = 0,
  PaintLayerHaveTransparency = 1,
  PaintLayerAppliedTransform = 1 << 1,
  PaintLayerUncachedClipRects = 1 << 2,
  PaintLayerPaintingOverlayScrollbars = 1 << 3,
  PaintLayerPaintingCompositingBackgroundPhase = 1 << 4,
  PaintLayerPaintingCompositingForegroundPhase = 1 << 5,
  PaintLayerPaintingCompositingMaskPhase = 1 << 6,
  PaintLayerPaintingCompositingScrollingPhase = 1 << 7,
  PaintLayerPaintingOverflowContents = 1 << 8,
  PaintLayerPaintingRootBackgroundOnly = 1 << 9,
  PaintLayerPaintingSkipRootBackground = 1 << 10,
  PaintLayerPaintingChildClippingMaskPhase = 1 << 11,
  PaintLayerPaintingRenderingClipPathAsMask = 1 << 12,
  PaintLayerPaintingCompositingAllPhases =
      (PaintLayerPaintingCompositingBackgroundPhase |
       PaintLayerPaintingCompositingForegroundPhase |
       PaintLayerPaintingCompositingMaskPhase)
};

typedef unsigned PaintLayerFlags;

struct PaintLayerPaintingInfo {
  STACK_ALLOCATED();
  PaintLayerPaintingInfo(PaintLayer* inRootLayer,
                         const LayoutRect& inDirtyRect,
                         GlobalPaintFlags globalPaintFlags,
                         const LayoutSize& inSubPixelAccumulation)
      : rootLayer(inRootLayer),
        paintDirtyRect(inDirtyRect),
        subPixelAccumulation(inSubPixelAccumulation),
        clipToDirtyRect(true),
        ancestorHasClipPathClipping(false),
        m_globalPaintFlags(globalPaintFlags) {}

  GlobalPaintFlags getGlobalPaintFlags() const { return m_globalPaintFlags; }

  // TODO(jchaffraix): We should encapsulate all these fields.
  PaintLayer* rootLayer;
  LayoutRect paintDirtyRect;  // relative to rootLayer;
  LayoutSize subPixelAccumulation;
  IntSize scrollOffsetAccumulation;
  bool clipToDirtyRect;
  bool ancestorHasClipPathClipping;

 private:
  const GlobalPaintFlags m_globalPaintFlags;
};

}  // namespace blink

#endif  // PaintLayerPaintingInfo_h