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// Copyright (C) 2024 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
#ifndef QCOLORSPACE_P_H
#define QCOLORSPACE_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 "qcolorspace.h"
#include "qcolorclut_p.h"
#include "qcolormatrix_p.h"
#include "qcolortrc_p.h"
#include "qcolortrclut_p.h"
#include <QtCore/qmutex.h>
#include <QtCore/qpoint.h>
#include <QtCore/qshareddata.h>
#include <memory>
QT_BEGIN_NAMESPACE
class Q_AUTOTEST_EXPORT QColorSpacePrimaries
{
public:
QColorSpacePrimaries() = default;
QColorSpacePrimaries(QColorSpace::Primaries primaries);
QColorSpacePrimaries(QPointF whitePoint,
QPointF redPoint,
QPointF greenPoint,
QPointF bluePoint)
: whitePoint(whitePoint)
, redPoint(redPoint)
, greenPoint(greenPoint)
, bluePoint(bluePoint)
{ }
QColorMatrix toXyzMatrix() const;
bool areValid() const;
QPointF whitePoint;
QPointF redPoint;
QPointF greenPoint;
QPointF bluePoint;
};
class QColorSpacePrivate : public QSharedData
{
public:
QColorSpacePrivate();
QColorSpacePrivate(QColorSpace::NamedColorSpace namedColorSpace);
QColorSpacePrivate(QColorSpace::Primaries primaries, QColorSpace::TransferFunction transferFunction, float gamma);
QColorSpacePrivate(QColorSpace::Primaries primaries, const QList<uint16_t> &transferFunctionTable);
QColorSpacePrivate(const QColorSpacePrimaries &primaries, QColorSpace::TransferFunction transferFunction, float gamma);
QColorSpacePrivate(const QColorSpacePrimaries &primaries, const QList<uint16_t> &transferFunctionTable);
QColorSpacePrivate(const QColorSpacePrimaries &primaries,
const QList<uint16_t> &redTransferFunctionTable,
const QList<uint16_t> &greenTransferFunctionTable,
const QList<uint16_t> &blueRransferFunctionTable);
QColorSpacePrivate(const QPointF &whitePoint, QColorSpace::TransferFunction transferFunction, float gamma);
QColorSpacePrivate(const QPointF &whitePoint, const QList<uint16_t> &transferFunctionTable);
QColorSpacePrivate(const QColorSpacePrivate &other) = default;
static const QColorSpacePrivate *get(const QColorSpace &colorSpace)
{
return colorSpace.d_ptr.get();
}
static QColorSpacePrivate *get(QColorSpace &colorSpace)
{
return colorSpace.d_ptr.get();
}
bool equals(const QColorSpacePrivate *other) const;
bool isValid() const noexcept;
void initialize();
void setToXyzMatrix();
void setTransferFunction();
void identifyColorSpace();
void setTransferFunctionTable(const QList<uint16_t> &transferFunctionTable);
void setTransferFunctionTables(const QList<uint16_t> &redTransferFunctionTable,
const QList<uint16_t> &greenTransferFunctionTable,
const QList<uint16_t> &blueTransferFunctionTable);
QColorTransform transformationToColorSpace(const QColorSpacePrivate *out) const;
QColorTransform transformationToXYZ() const;
bool isThreeComponentMatrix() const;
void clearElementListProcessingForEdit();
static constexpr QColorSpace::NamedColorSpace Unknown = QColorSpace::NamedColorSpace(0);
QColorSpace::NamedColorSpace namedColorSpace = Unknown;
QColorSpace::Primaries primaries = QColorSpace::Primaries::Custom;
QColorSpace::TransferFunction transferFunction = QColorSpace::TransferFunction::Custom;
QColorSpace::TransformModel transformModel = QColorSpace::TransformModel::ThreeComponentMatrix;
QColorSpace::ColorModel colorModel = QColorSpace::ColorModel::Undefined;
float gamma = 0.0f;
QColorVector whitePoint;
// Three component matrix data:
QColorTrc trc[3];
QColorMatrix toXyz;
QColorMatrix chad;
// Element list processing data:
struct TransferElement {
QColorTrc trc[4];
};
using Element = std::variant<TransferElement, QColorMatrix, QColorVector, QColorCLUT>;
bool isPcsLab = false;
// A = device, B = PCS
QList<Element> mAB, mBA;
// Metadata
QString description;
QString userDescription;
QByteArray iccProfile;
// Cached tables for three component matrix transform:
Q_CONSTINIT static QBasicMutex s_lutWriteLock;
struct LUT {
LUT() = default;
~LUT() = default;
LUT(const LUT &other)
{
if (other.generated.loadAcquire()) {
table[0] = other.table[0];
table[1] = other.table[1];
table[2] = other.table[2];
generated.storeRelaxed(1);
}
}
std::shared_ptr<QColorTrcLut> &operator[](int i) { return table[i]; }
const std::shared_ptr<QColorTrcLut> &operator[](int i) const { return table[i]; }
std::shared_ptr<QColorTrcLut> table[3];
QAtomicInt generated;
} mutable lut;
};
QT_END_NAMESPACE
#endif // QCOLORSPACE_P_H
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