// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QCOSMETICSTROKER_P_H

#define QCOSMETICSTROKER_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/private/qtguiglobal_p.h>

#include <private/qdrawhelper_p.h>

#include <private/qvectorpath_p.h>

#include <private/qpaintengine_raster_p.h>

#include <qpen.h>

QT_BEGIN_NAMESPACE

class QCosmeticStroker;

typedef bool (*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 {

        NoDirection = 0,

        TopToBottom = 0x1,

        BottomToTop = 0x2,

        LeftToRight = 0x4,

        RightToLeft = 0x8,

        VerticalMask = 0x3,

        HorizontalMask = 0xc

    };

    QCosmeticStroker(QRasterPaintEngineState *s, const QRect &dr, const QRect &dr_unclipped)

        : state(s),

          deviceRect(dr_unclipped),

          clip(dr),

          pattern(nullptr),

          reversePattern(nullptr),

          patternSize(0),

          patternLength(0),

          patternOffset(0),

          current_span(0),

          lastDir(NoDirection),

          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 deviceRect;

    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

#endif // QCOSMETICLINE_H