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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef PaintPhase_h
#define PaintPhase_h
namespace blink {
// The painting of a layer occurs in 4 phases, Each involves a recursive descent
// into the layer's layout objects in painting order:
// 1. Background phase: backgrounds and borders of all blocks are painted.
// Inlines are not painted at all.
// 2. Float phase: floating objects are painted above block backgrounds but entirely
// below inline content that can overlap them.
// 3. Foreground phase: all inlines are fully painted. Atomic inline elements will
// get all 4 phases invoked on them during this phase, as if they were stacking
// contexts (see ObjectPainter::paintAllPhasesAtomically()).
// 4. Outline phase: outlines are painted over the foreground.
enum PaintPhase {
// Background phase
//
// Paint background of the current object and non-self-painting descendants.
PaintPhaseBlockBackground = 0,
//
// The following two values are added besides the normal PaintPhaseBlockBackground
// to distinguish backgrounds for the object itself and for descendants, because
// the two backgrounds are often painted with different scroll offsets and clips.
//
// Paint background of the current object only.
PaintPhaseSelfBlockBackgroundOnly = 1,
// Paint backgrounds of non-self-painting descendants only. The painter should call
// each non-self-painting child's paint method by passing paintInfo.forDescendants() which
// converts PaintPhaseDescendantsBlockBackgroundsOnly to PaintPhaseBlockBackground.
PaintPhaseDescendantBlockBackgroundsOnly = 2,
// Float phase
PaintPhaseFloat = 3,
// Foreground phase
PaintPhaseForeground = 4,
// Outline phase
//
// Paint outline for the current object and non-self-painting descendants.
PaintPhaseOutline = 5,
//
// Similar to the background phase, the following two values are added for painting
// outlines of the object itself and for descendants.
//
// Paint outline for the current object only.
PaintPhaseSelfOutlineOnly = 6,
// Paint outlines of non-self-painting descendants only. The painter should call each
// non-self-painting child's paint method by passing paintInfo.forDescendants() which
// converts PaintPhaseDescendantsOutlinesOnly to PaintPhaseBlockOutline.
PaintPhaseDescendantOutlinesOnly = 7,
// The below are auxiliary phases which are used to paint special effects.
PaintPhaseSelection = 8,
PaintPhaseTextClip = 9,
PaintPhaseMask = 10,
PaintPhaseClippingMask = 11,
PaintPhaseMax = PaintPhaseClippingMask,
// These values must be kept in sync with DisplayItem::Type and DisplayItem::typeAsDebugString().
};
inline bool shouldPaintSelfBlockBackground(PaintPhase phase)
{
return phase == PaintPhaseBlockBackground || phase == PaintPhaseSelfBlockBackgroundOnly;
}
inline bool shouldPaintSelfOutline(PaintPhase phase)
{
return phase == PaintPhaseOutline || phase == PaintPhaseSelfOutlineOnly;
}
inline bool shouldPaintDescendantBlockBackgrounds(PaintPhase phase)
{
return phase == PaintPhaseBlockBackground || phase == PaintPhaseDescendantBlockBackgroundsOnly;
}
inline bool shouldPaintDescendantOutlines(PaintPhase phase)
{
return phase == PaintPhaseOutline || phase == PaintPhaseDescendantOutlinesOnly;
}
// Those flags are meant as global tree operations. This means
// that they should be constant for a paint phase.
enum GlobalPaintFlag {
GlobalPaintNormalPhase = 0,
// Used when painting selection as part of a drag-image. This
// flag disables a lot of the painting code and specifically
// triggers a PaintPhaseSelection.
GlobalPaintSelectionOnly = 1 << 0,
// Used when painting a drag-image or printing in order to
// ignore the hardware layers and paint the whole tree
// into the topmost layer.
GlobalPaintFlattenCompositingLayers = 1 << 1,
// Used when printing in order to adapt the output to the medium, for
// instance by not painting shadows and selections on text, and add
// URL metadata for links.
GlobalPaintPrinting = 1 << 2
};
typedef unsigned GlobalPaintFlags;
} // namespace blink
#endif // PaintPhase_h
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