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#include "testtessellator.h"

#include <private/qtessellator_p.h>

#include "math.h"

class TestTessellator : public QTessellator

{

public:

    QVector<XTrapezoid> *traps;

    void addTrap(const Trapezoid &trap);

};

void TestTessellator::addTrap(const Trapezoid &trap)

{

    XTrapezoid xtrap;

    xtrap.top = Q27Dot5ToXFixed(trap.top);

    xtrap.bottom = Q27Dot5ToXFixed(trap.bottom);

    xtrap.left.p1.x = Q27Dot5ToXFixed(trap.topLeft->x);

    xtrap.left.p1.y = Q27Dot5ToXFixed(trap.topLeft->y);

    xtrap.left.p2.x = Q27Dot5ToXFixed(trap.bottomLeft->x);

    xtrap.left.p2.y = Q27Dot5ToXFixed(trap.bottomLeft->y);

    xtrap.right.p1.x = Q27Dot5ToXFixed(trap.topRight->x);

    xtrap.right.p1.y = Q27Dot5ToXFixed(trap.topRight->y);

    xtrap.right.p2.x = Q27Dot5ToXFixed(trap.bottomRight->x);

    xtrap.right.p2.y = Q27Dot5ToXFixed(trap.bottomRight->y);

    traps->append(xtrap);

}

void test_tesselate_polygon(QVector<XTrapezoid> *traps, const QPointF *points, int nPoints,

                         bool winding)

{

    TestTessellator t;

    t.traps = traps;

    t.setWinding(winding);

    t.tessellate(points, nPoints);

}

void test_tessellate_polygon_convex(QVector<XTrapezoid> *traps, const QPointF *points, int nPoints,

                                   bool winding)

{

    TestTessellator t;

    t.traps = traps;

    t.setWinding(winding);

    t.tessellateConvex(points, nPoints);

}

void test_tessellate_polygon_rect(QVector<XTrapezoid> *traps, const QPointF *points, int nPoints,

                                  bool winding)

{

    // 5 points per rect

    Q_ASSERT(nPoints % 5 == 0);

    TestTessellator t;

    t.traps = traps;

    t.setWinding(winding);

    for (int i = 0; i < nPoints / 5; ++i) {

        QPointF rectA = points[5*i];

        QPointF rectB = points[5*i+1];

        QPointF rectC = points[5*i+2];

        QPointF rectD = points[5*i+3];

        QPointF a = (rectA + rectD) * 0.5;

        QPointF b = (rectB + rectC) * 0.5;

        QPointF delta = rectA - rectD;

        qreal width = sqrt(delta.x() * delta.x() + delta.y() * delta.y());

        t.tessellateRect(a, b, width);

    }

}