| 1 | // Copyright (C) 2022 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 | #include "qquickcolordialogutils_p.h" |
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| 5 | |
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| 6 | QT_BEGIN_NAMESPACE |
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| 7 | |
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| 8 | std::pair<qreal, qreal> getSaturationAndValue(qreal saturation, qreal lightness) |
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| 9 | { |
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| 10 | const qreal v = lightness + saturation * qMin(a: lightness, b: 1 - lightness); |
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| 11 | if (v == .0) |
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| 12 | return { .0, .0 }; |
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| 13 | const qreal s = 2 * (1 - lightness / v); |
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| 14 | return { s, v }; |
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| 15 | } |
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| 16 | |
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| 17 | std::pair<qreal, qreal> getSaturationAndLightness(qreal saturation, qreal value) |
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| 18 | { |
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| 19 | const qreal l = value * (1 - saturation / 2); |
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| 20 | if (l == .0) |
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| 21 | return { .0, .0 }; |
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| 22 | if (l == 1 && value == 1) |
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| 23 | return { saturation, l }; |
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| 24 | const qreal s = (value - l) / qMin(a: l, b: 1 - l); |
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| 25 | return { s, l }; |
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| 26 | } |
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| 27 | |
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| 28 | QT_END_NAMESPACE |
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| 29 | |
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