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/****************************************************************************
**
** Copyright (C) 2018 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QCOLORTRC_P_H
#define QCOLORTRC_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 <QtGui/private/qtguiglobal_p.h>
#include "qcolortransferfunction_p.h"
#include "qcolortransfertable_p.h"
QT_BEGIN_NAMESPACE
// Defines an ICC TRC (Tone Reproduction Curve)
class Q_GUI_EXPORT QColorTrc
{
public:
QColorTrc() noexcept : m_type(Type::Uninitialized)
{ }
QColorTrc(const QColorTransferFunction &fun) : m_type(Type::Function), m_fun(fun)
{ }
QColorTrc(const QColorTransferTable &table) : m_type(Type::Table), m_table(table)
{ }
enum class Type {
Uninitialized,
Function,
Table
};
bool isLinear() const
{
return m_type == Type::Uninitialized || (m_type == Type::Function && m_fun.isLinear());
}
bool isValid() const
{
return m_type != Type::Uninitialized;
}
float apply(float x) const
{
if (m_type == Type::Table)
return m_table.apply(x);
if (m_type == Type::Function)
return m_fun.apply(x);
return x;
}
float applyInverse(float x) const
{
if (m_type == Type::Table)
return m_table.applyInverse(x);
if (m_type == Type::Function)
return m_fun.inverted().apply(x);
return x;
}
friend inline bool operator!=(const QColorTrc &o1, const QColorTrc &o2);
friend inline bool operator==(const QColorTrc &o1, const QColorTrc &o2);
Type m_type;
QColorTransferFunction m_fun;
QColorTransferTable m_table;
};
inline bool operator!=(const QColorTrc &o1, const QColorTrc &o2)
{
if (o1.m_type != o2.m_type)
return true;
if (o1.m_type == QColorTrc::Type::Function)
return o1.m_fun != o2.m_fun;
if (o1.m_type == QColorTrc::Type::Table)
return o1.m_table != o2.m_table;
return false;
}
inline bool operator==(const QColorTrc &o1, const QColorTrc &o2)
{
return !(o1 != o2);
}
QT_END_NAMESPACE
#endif // QCOLORTRC
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