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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QVECTORPATH_P_H
#define QVECTORPATH_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtGui/qpaintengine.h>
#include <private/qpaintengine_p.h>
#include <private/qstroker_p.h>
#include <private/qpainter_p.h>
QT_BEGIN_NAMESPACE
class QPaintEngineEx;
typedef void (*qvectorpath_cache_cleanup)(QPaintEngineEx *engine, void *data);
struct QRealRect {
qreal x1, y1, x2, y2;
};
class Q_GUI_EXPORT QVectorPath
{
public:
enum Hint {
// Shape hints, in 0x000000ff, access using shape()
AreaShapeMask = 0x0001, // shape covers an area
NonConvexShapeMask = 0x0002, // shape is not convex
CurvedShapeMask = 0x0004, // shape contains curves...
LinesShapeMask = 0x0008,
RectangleShapeMask = 0x0010,
ShapeMask = 0x001f,
// Shape hints merged into basic shapes..
LinesHint = LinesShapeMask,
RectangleHint = AreaShapeMask | RectangleShapeMask,
EllipseHint = AreaShapeMask | CurvedShapeMask,
ConvexPolygonHint = AreaShapeMask,
PolygonHint = AreaShapeMask | NonConvexShapeMask,
RoundedRectHint = AreaShapeMask | CurvedShapeMask,
ArbitraryShapeHint = AreaShapeMask | NonConvexShapeMask | CurvedShapeMask,
// Other hints
IsCachedHint = 0x0100, // Set if the cache hint is set
ShouldUseCacheHint = 0x0200, // Set if the path should be cached when possible..
ControlPointRect = 0x0400, // Set if the control point rect has been calculated...
// Shape rendering specifiers...
OddEvenFill = 0x1000,
WindingFill = 0x2000,
ImplicitClose = 0x4000
};
// ### Falcon: introduca a struct XY for points so lars is not so confused...
QVectorPath(const qreal *points,
int count,
const QPainterPath::ElementType *elements = 0,
uint hints = ArbitraryShapeHint)
: m_elements(elements),
m_points(points),
m_count(count),
m_hints(hints)
{
}
~QVectorPath();
QRectF controlPointRect() const;
inline Hint shape() const { return (Hint) (m_hints & ShapeMask); }
inline bool isConvex() const { return (m_hints & NonConvexShapeMask) == 0; }
inline bool isCurved() const { return m_hints & CurvedShapeMask; }
inline bool isCacheable() const { return m_hints & ShouldUseCacheHint; }
inline bool hasImplicitClose() const { return m_hints & ImplicitClose; }
inline bool hasWindingFill() const { return m_hints & WindingFill; }
inline void makeCacheable() const { m_hints |= ShouldUseCacheHint; m_cache = 0; }
inline uint hints() const { return m_hints; }
inline const QPainterPath::ElementType *elements() const { return m_elements; }
inline const qreal *points() const { return m_points; }
inline bool isEmpty() const { return m_points == 0; }
inline int elementCount() const { return m_count; }
inline const QPainterPath convertToPainterPath() const;
static inline uint polygonFlags(QPaintEngine::PolygonDrawMode mode)
{
switch (mode) {
case QPaintEngine::ConvexMode: return ConvexPolygonHint | ImplicitClose;
case QPaintEngine::OddEvenMode: return PolygonHint | OddEvenFill | ImplicitClose;
case QPaintEngine::WindingMode: return PolygonHint | WindingFill | ImplicitClose;
case QPaintEngine::PolylineMode: return PolygonHint;
default: return 0;
}
}
struct CacheEntry {
QPaintEngineEx *engine;
void *data;
qvectorpath_cache_cleanup cleanup;
CacheEntry *next;
};
CacheEntry *addCacheData(QPaintEngineEx *engine, void *data, qvectorpath_cache_cleanup cleanup) const;
inline CacheEntry *lookupCacheData(QPaintEngineEx *engine) const {
Q_ASSERT(m_hints & ShouldUseCacheHint);
CacheEntry *e = m_cache;
while (e) {
if (e->engine == engine)
return e;
e = e->next;
}
return 0;
}
template <typename T> static inline bool isRect(const T *pts, int elementCount) {
return (elementCount == 5 // 5-point polygon, check for closed rect
&& pts[0] == pts[8] && pts[1] == pts[9] // last point == first point
&& pts[0] == pts[6] && pts[2] == pts[4] // x values equal
&& pts[1] == pts[3] && pts[5] == pts[7] // y values equal...
&& pts[0] < pts[4] && pts[1] < pts[5]
) ||
(elementCount == 4 // 4-point polygon, check for unclosed rect
&& pts[0] == pts[6] && pts[2] == pts[4] // x values equal
&& pts[1] == pts[3] && pts[5] == pts[7] // y values equal...
&& pts[0] < pts[4] && pts[1] < pts[5]
);
}
inline bool isRect() const
{
const QPainterPath::ElementType * const types = elements();
return (shape() == QVectorPath::RectangleHint)
|| (isRect(points(), elementCount())
&& (!types || (types[0] == QPainterPath::MoveToElement
&& types[1] == QPainterPath::LineToElement
&& types[2] == QPainterPath::LineToElement
&& types[3] == QPainterPath::LineToElement)));
}
private:
Q_DISABLE_COPY(QVectorPath)
const QPainterPath::ElementType *m_elements;
const qreal *m_points;
const int m_count;
mutable uint m_hints;
mutable QRealRect m_cp_rect;
mutable CacheEntry *m_cache;
};
Q_GUI_EXPORT const QVectorPath &qtVectorPathForPath(const QPainterPath &path);
QT_END_NAMESPACE
#endif
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