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// Copyright (C) 2018 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
// Qt-Security score:significant reason:default
#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 "qcolortransfergeneric_p.h"
#include "qcolortransfertable_p.h"
QT_BEGIN_NAMESPACE
// Defines a TRC (Tone Reproduction Curve)
class Q_GUI_EXPORT QColorTrc
{
public:
QColorTrc() noexcept : m_type(Type::Uninitialized) { }
QColorTrc(const QColorTransferFunction &fun) : m_type(Type::ParameterizedFunction), m_fun(fun) { }
QColorTrc(const QColorTransferTable &table) : m_type(Type::Table), m_table(table) { }
QColorTrc(const QColorTransferGenericFunction &hdr) : m_type(Type::GenericFunction), m_hdr(hdr) { }
QColorTrc(QColorTransferFunction &&fun) noexcept : m_type(Type::ParameterizedFunction), m_fun(std::move(fun)) { }
QColorTrc(QColorTransferTable &&table) noexcept : m_type(Type::Table), m_table(std::move(table)) { }
QColorTrc(QColorTransferGenericFunction &&hdr) noexcept : m_type(Type::GenericFunction), m_hdr(std::move(hdr)) { }
enum class Type {
Uninitialized,
ParameterizedFunction,
GenericFunction,
Table,
};
bool isIdentity() const
{
return (m_type == Type::ParameterizedFunction && m_fun.isIdentity())
|| (m_type == Type::Table && m_table.isIdentity());
}
bool isValid() const
{
return m_type != Type::Uninitialized;
}
float apply(float x) const
{
switch (m_type) {
case Type::ParameterizedFunction:
return fun().apply(x);
case Type::GenericFunction:
return hdr().apply(x);
case Type::Table:
return table().apply(x);
default:
break;
}
return x;
}
float applyExtended(float x) const
{
switch (m_type) {
case Type::ParameterizedFunction:
return std::copysign(fun().apply(std::abs(x)), x);
case Type::GenericFunction:
return hdr().apply(x);
case Type::Table:
return table().apply(x);
default:
break;
}
return x;
}
float applyInverse(float x) const
{
switch (m_type) {
case Type::ParameterizedFunction:
return fun().inverted().apply(x);
case Type::GenericFunction:
return hdr().applyInverse(x);
case Type::Table:
return table().applyInverse(x);
default:
break;
}
return x;
}
float applyInverseExtended(float x) const
{
switch (m_type) {
case Type::ParameterizedFunction:
return std::copysign(applyInverse(std::abs(x)), x);
case Type::GenericFunction:
return hdr().applyInverse(x);
case Type::Table:
return table().applyInverse(x);
default:
break;
}
return x;
}
const QColorTransferTable &table() const { return m_table; }
const QColorTransferFunction &fun() const{ return m_fun; }
const QColorTransferGenericFunction &hdr() const { return m_hdr; }
Type type() const noexcept { return m_type; }
Type m_type;
friend inline bool comparesEqual(const QColorTrc &lhs, const QColorTrc &rhs);
Q_DECLARE_EQUALITY_COMPARABLE_NON_NOEXCEPT(QColorTrc)
QColorTransferFunction m_fun;
QColorTransferTable m_table;
QColorTransferGenericFunction m_hdr;
};
inline bool comparesEqual(const QColorTrc &o1, const QColorTrc &o2)
{
if (o1.m_type != o2.m_type)
return false;
if (o1.m_type == QColorTrc::Type::ParameterizedFunction)
return o1.m_fun == o2.m_fun;
if (o1.m_type == QColorTrc::Type::Table)
return o1.m_table == o2.m_table;
if (o1.m_type == QColorTrc::Type::GenericFunction)
return o1.m_hdr == o2.m_hdr;
return true;
}
QT_END_NAMESPACE
#endif // QCOLORTRC