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// 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
#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();
// 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
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