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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 QVIDEOTRANSFORMATION_P_H
#define QVIDEOTRANSFORMATION_P_H
#include <qtvideo.h>
#include <optional>
//
// 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.
//
QT_BEGIN_NAMESPACE
struct VideoTransformation
{
QtVideo::Rotation rotation = QtVideo::Rotation::None;
bool mirroredHorizontallyAfterRotation = false;
void rotate(QtVideo::Rotation rotation)
{
if (rotation != QtVideo::Rotation::None) {
int angle = qToUnderlying(rotation);
if (mirroredHorizontallyAfterRotation && angle % 180 != 0)
angle += 180;
appendRotation(angle);
}
}
void mirrorHorizontally(bool mirror = true) { mirroredHorizontallyAfterRotation ^= mirror; }
void mirrorVertically(bool mirror = true)
{
if (mirror) {
mirroredHorizontallyAfterRotation ^= true;
appendRotation(180);
}
}
int rotationIndex() const { return qToUnderlying(rotation) / 90; }
private:
void appendRotation(quint32 angle)
{
rotation = QtVideo::Rotation((angle + qToUnderlying(rotation)) % 360);
}
};
using VideoTransformationOpt = std::optional<VideoTransformation>;
inline bool operator==(const VideoTransformation &lhs, const VideoTransformation &rhs)
{
return lhs.rotation == rhs.rotation
&& lhs.mirroredHorizontallyAfterRotation == rhs.mirroredHorizontallyAfterRotation;
}
inline bool operator!=(const VideoTransformation &lhs, const VideoTransformation &rhs)
{
return !(lhs == rhs);
}
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug dbg, const VideoTransformation &transform);
QT_END_NAMESPACE
#endif // QVIDEOTRANSFORMATION_P_H