diff options
Diffstat (limited to 'src/gui/painting/qcolortrclut.cpp')
-rw-r--r-- | src/gui/painting/qcolortrclut.cpp | 117 |
1 files changed, 59 insertions, 58 deletions
diff --git a/src/gui/painting/qcolortrclut.cpp b/src/gui/painting/qcolortrclut.cpp index 8e2235bfa0..8a7673bc00 100644 --- a/src/gui/painting/qcolortrclut.cpp +++ b/src/gui/painting/qcolortrclut.cpp @@ -1,41 +1,5 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtGui module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// 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 #include "qcolortrclut_p.h" #include "qcolortransferfunction_p.h" @@ -49,43 +13,80 @@ std::shared_ptr<QColorTrcLut> QColorTrcLut::create() return std::make_shared<Access>(); } -std::shared_ptr<QColorTrcLut> QColorTrcLut::fromGamma(qreal gamma) +std::shared_ptr<QColorTrcLut> QColorTrcLut::fromGamma(qreal gamma, Direction dir) { auto cp = create(); + cp->setFromGamma(gamma, dir); + return cp; +} - for (int i = 0; i <= (255 * 16); ++i) { - cp->m_toLinear[i] = ushort(qRound(qPow(i / qreal(255 * 16), gamma) * (255 * 256))); - cp->m_fromLinear[i] = ushort(qRound(qPow(i / qreal(255 * 16), qreal(1) / gamma) * (255 * 256))); - } - +std::shared_ptr<QColorTrcLut> QColorTrcLut::fromTransferFunction(const QColorTransferFunction &fun, Direction dir) +{ + auto cp = create(); + cp->setFromTransferFunction(fun, dir); return cp; } -std::shared_ptr<QColorTrcLut> QColorTrcLut::fromTransferFunction(const QColorTransferFunction &fun) +std::shared_ptr<QColorTrcLut> QColorTrcLut::fromTransferTable(const QColorTransferTable &table, Direction dir) { auto cp = create(); - QColorTransferFunction inv = fun.inverted(); + cp->setFromTransferTable(table, dir); + return cp; +} - for (int i = 0; i <= (255 * 16); ++i) { - cp->m_toLinear[i] = ushort(qRound(fun.apply(i / qreal(255 * 16)) * (255 * 256))); - cp->m_fromLinear[i] = ushort(qRound(inv.apply(i / qreal(255 * 16)) * (255 * 256))); +void QColorTrcLut::setFromGamma(qreal gamma, Direction dir) +{ + if (dir & ToLinear) { + if (!m_toLinear) + m_toLinear.reset(new ushort[Resolution + 1]); + for (int i = 0; i <= Resolution; ++i) + m_toLinear[i] = ushort(qRound(qPow(i / qreal(Resolution), gamma) * (255 * 256))); } - return cp; + if (dir & FromLinear) { + if (!m_fromLinear) + m_fromLinear.reset(new ushort[Resolution + 1]); + for (int i = 0; i <= Resolution; ++i) + m_fromLinear[i] = ushort(qRound(qPow(i / qreal(Resolution), qreal(1) / gamma) * (255 * 256))); + } } -std::shared_ptr<QColorTrcLut> QColorTrcLut::fromTransferTable(const QColorTransferTable &table) +void QColorTrcLut::setFromTransferFunction(const QColorTransferFunction &fun, Direction dir) { - auto cp = create(); + if (dir & ToLinear) { + if (!m_toLinear) + m_toLinear.reset(new ushort[Resolution + 1]); + for (int i = 0; i <= Resolution; ++i) + m_toLinear[i] = ushort(qRound(fun.apply(i / qreal(Resolution)) * (255 * 256))); + } - float minInverse = 0.0f; - for (int i = 0; i <= (255 * 16); ++i) { - cp->m_toLinear[i] = ushort(qBound(0, qRound(table.apply(i / qreal(255 * 16)) * (255 * 256)), 65280)); - minInverse = table.applyInverse(i / qreal(255 * 16), minInverse); - cp->m_fromLinear[i] = ushort(qBound(0, qRound(minInverse * (255 * 256)), 65280)); + if (dir & FromLinear) { + if (!m_fromLinear) + m_fromLinear.reset(new ushort[Resolution + 1]); + QColorTransferFunction inv = fun.inverted(); + for (int i = 0; i <= Resolution; ++i) + m_fromLinear[i] = ushort(qRound(inv.apply(i / qreal(Resolution)) * (255 * 256))); } +} - return cp; +void QColorTrcLut::setFromTransferTable(const QColorTransferTable &table, Direction dir) +{ + if (dir & ToLinear) { + if (!m_toLinear) + m_toLinear.reset(new ushort[Resolution + 1]); + for (int i = 0; i <= Resolution; ++i) + m_toLinear[i] = ushort(qBound(0, qRound(table.apply(i / qreal(Resolution)) * (255 * 256)), 65280)); + } + + if (dir & FromLinear) { + if (!m_fromLinear) + m_fromLinear.reset(new ushort[Resolution + 1]); + float minInverse = 0.0f; + for (int i = 0; i <= Resolution; ++i) { + minInverse = table.applyInverse(i / qreal(Resolution), minInverse); + m_fromLinear[i] = ushort(qBound(0, qRound(minInverse * (255 * 256)), 65280)); + } + } } QT_END_NAMESPACE |