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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QCOSMETICSTROKER_P_H
#define QCOSMETICSTROKER_P_H
#include <private/qdrawhelper_p.h>
#include <private/qvectorpath_p.h>
#include <private/qpaintengine_raster_p.h>
#include <qpen.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Gui)
class QCosmeticStroker;
typedef void (*StrokeLine)(QCosmeticStroker *stroker, qreal x1, qreal y1, qreal x2, qreal y2, int caps);
class QCosmeticStroker
{
public:
struct Point {
int x;
int y;
};
struct PointF {
qreal x;
qreal y;
};
enum Caps {
NoCaps = 0,
CapBegin = 0x1,
CapEnd = 0x2,
};
// used to avoid drop outs or duplicated points
enum Direction {
TopToBottom,
BottomToTop,
LeftToRight,
RightToLeft
};
QCosmeticStroker(QRasterPaintEngineState *s, const QRect &dr)
: state(s),
clip(dr),
pattern(0),
reversePattern(0),
patternSize(0),
patternLength(0),
patternOffset(0),
current_span(0),
lastDir(LeftToRight),
lastAxisAligned(false)
{ setup(); }
~QCosmeticStroker() { free(pattern); free(reversePattern); }
void drawLine(const QPointF &p1, const QPointF &p2);
void drawPath(const QVectorPath &path);
void drawPoints(const QPoint *points, int num);
void drawPoints(const QPointF *points, int num);
QRasterPaintEngineState *state;
QRect clip;
// clip bounds in real
qreal xmin, xmax;
qreal ymin, ymax;
StrokeLine stroke;
bool drawCaps;
int *pattern;
int *reversePattern;
int patternSize;
int patternLength;
int patternOffset;
enum { NSPANS = 255 };
QT_FT_Span spans[NSPANS];
int current_span;
ProcessSpans blend;
int opacity;
uint color;
uint *pixels;
int ppl;
Direction lastDir;
Point lastPixel;
bool lastAxisAligned;
private:
void setup();
void renderCubic(const QPointF &p1, const QPointF &p2, const QPointF &p3, const QPointF &p4, int caps);
void renderCubicSubdivision(PointF *points, int level, int caps);
// used for closed subpaths
void calculateLastPoint(qreal rx1, qreal ry1, qreal rx2, qreal ry2);
public:
bool clipLine(qreal &x1, qreal &y1, qreal &x2, qreal &y2);
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // QCOSMETICLINE_H
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