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Diffstat (limited to 'src/gui/painting/qcolorspace_p.h')
| -rw-r--r-- | src/gui/painting/qcolorspace_p.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/gui/painting/qcolorspace_p.h b/src/gui/painting/qcolorspace_p.h new file mode 100644 index 0000000000..e7add19ed3 --- /dev/null +++ b/src/gui/painting/qcolorspace_p.h @@ -0,0 +1,160 @@ +/**************************************************************************** +** +** 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 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 "qcolormatrix_p.h" +#include "qcolortrc_p.h" +#include "qcolortrclut_p.h" + +#include <QtCore/qmutex.h> +#include <QtCore/qpoint.h> +#include <QtCore/qshareddata.h> + +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 fun, float gamma); + QColorSpacePrivate(const QColorSpacePrimaries &primaries, QColorSpace::TransferFunction fun, float gamma); + QColorSpacePrivate(const QColorSpacePrivate &other) = default; + + // named different from get to avoid accidental detachs + static QColorSpacePrivate *getWritable(QColorSpace &colorSpace) + { + if (!colorSpace.d_ptr) { + colorSpace.d_ptr = new QColorSpacePrivate; + colorSpace.d_ptr->ref.ref(); + } else if (colorSpace.d_ptr->ref.loadRelaxed() != 1) { + colorSpace.d_ptr->ref.deref(); + colorSpace.d_ptr = new QColorSpacePrivate(*colorSpace.d_ptr); + colorSpace.d_ptr->ref.ref(); + } + Q_ASSERT(colorSpace.d_ptr->ref.loadRelaxed() == 1); + return colorSpace.d_ptr; + } + + static const QColorSpacePrivate *get(const QColorSpace &colorSpace) + { + return colorSpace.d_ptr; + } + + void initialize(); + void setToXyzMatrix(); + void setTransferFunction(); + void identifyColorSpace(); + QColorTransform transformationToColorSpace(const QColorSpacePrivate *out) const; + + static constexpr QColorSpace::NamedColorSpace Unknown = QColorSpace::NamedColorSpace(0); + QColorSpace::NamedColorSpace namedColorSpace = Unknown; + + QColorSpace::Primaries primaries = QColorSpace::Primaries::Custom; + QColorSpace::TransferFunction transferFunction = QColorSpace::TransferFunction::Custom; + float gamma = 0.0f; + QColorVector whitePoint; + + QColorTrc trc[3]; + QColorMatrix toXyz; + + QString description; + QByteArray iccProfile; + + 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); + } + } + QSharedPointer<QColorTrcLut> &operator[](int i) { return table[i]; } + const QSharedPointer<QColorTrcLut> &operator[](int i) const { return table[i]; } + QSharedPointer<QColorTrcLut> table[3]; + QAtomicInt generated; + } mutable lut; +}; + +QT_END_NAMESPACE + +#endif // QCOLORSPACE_P_H |