| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QMATH_P_H |
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| 5 | #define QMATH_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <qmath.h> |
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| 19 | #include <private/qglobal_p.h> |
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| 20 | #include <qtransform.h> |
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| 21 | |
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| 22 | QT_BEGIN_NAMESPACE |
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| 23 | |
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| 24 | static const qreal Q_PI = qreal(M_PI); // pi |
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| 25 | static const qreal Q_MM_PER_INCH = 25.4; |
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| 26 | |
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| 27 | inline QRect qt_mapFillRect(const QRectF &rect, const QTransform &xf) |
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| 28 | { |
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| 29 | // Only for xf <= scaling or 90 degree rotations |
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| 30 | Q_ASSERT(xf.type() <= QTransform::TxScale |
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| 31 | || (xf.type() == QTransform::TxRotate && qFuzzyIsNull(xf.m11()) && qFuzzyIsNull(xf.m22()))); |
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| 32 | // Transform the corners instead of the rect to avoid hitting numerical accuracy limit |
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| 33 | // when transforming topleft and size separately and adding afterwards, |
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| 34 | // as that can sometimes be slightly off around the .5 point, leading to wrong rounding |
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| 35 | QPoint pt1 = xf.map(p: rect.topLeft()).toPoint(); |
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| 36 | QPoint pt2 = xf.map(p: rect.bottomRight()).toPoint(); |
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| 37 | // Normalize and adjust for the QRect vs. QRectF bottomright |
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| 38 | return QRect::span(p1: pt1, p2: pt2).adjusted(xp1: 0, yp1: 0, xp2: -1, yp2: -1); |
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| 39 | } |
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| 40 | |
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| 41 | QT_END_NAMESPACE |
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| 42 | |
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| 43 | #endif // QMATH_P_H |
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| 44 | |
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