// 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 QMATH_P_H

#define QMATH_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 <qmath.h>

#include <private/qglobal_p.h>

#include <qtransform.h>

QT_BEGIN_NAMESPACE

static const qreal Q_PI   = qreal(M_PI);     // pi

static const qreal Q_MM_PER_INCH = 25.4;

inline QRect qt_mapFillRect(const QRectF &rect, const QTransform &xf)

{

    // Only for xf <= scaling or 90 degree rotations

    Q_ASSERT(xf.type() <= QTransform::TxScale

             || (xf.type() == QTransform::TxRotate && qFuzzyIsNull(xf.m11()) && qFuzzyIsNull(xf.m22())));

    // Transform the corners instead of the rect to avoid hitting numerical accuracy limit

    // when transforming topleft and size separately and adding afterwards,

    // as that can sometimes be slightly off around the .5 point, leading to wrong rounding

    QPoint pt1 = xf.map(rect.topLeft()).toPoint();

    QPoint pt2 = xf.map(rect.bottomRight()).toPoint();

    // cut short if the result will be an empty QRect anyway

    // side effect: avoids overflows in the calculations below

    if (Q_UNLIKELY(pt1.x() == pt2.x() || pt1.y() == pt2.y()))

        return QRect();

    // Normalize and adjust for the QRect vs. QRectF bottomright

    return QRect::span(pt1, pt2).adjusted(0, 0, -1, -1);

}

QT_END_NAMESPACE

#endif // QMATH_P_H