qscreencapture.cpp

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// Copyright (C) 2022 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
 
#include "qscreencapture.h"
#include "qmediacapturesession.h"
#include <private/qplatformmediaintegration_p.h>
#include <private/qplatformsurfacecapture_p.h>
#include <private/qobject_p.h>
 
QT_BEGIN_NAMESPACE
 
static QScreenCapture::Error toScreenCaptureError(QPlatformSurfaceCapture::Error error)
{
    return static_cast<QScreenCapture::Error>(error);
}
 
class QScreenCapturePrivate : public QObjectPrivate
{
public:
    QMediaCaptureSession *captureSession = nullptr;
    std::unique_ptr<QPlatformSurfaceCapture> platformScreenCapture;
};
 
QScreenCapture::QScreenCapture(QObject *parent)
    : QObject(*new QScreenCapturePrivate, parent)
{
    Q_D(QScreenCapture);
 
    auto platformCapture = QPlatformMediaIntegration::instance()->createScreenCapture(this);
    if (platformCapture) {
        connect(platformCapture, &QPlatformSurfaceCapture::activeChanged, this,
                &QScreenCapture::activeChanged);
        connect(platformCapture, &QPlatformSurfaceCapture::errorChanged, this,
                &QScreenCapture::errorChanged);
        connect(platformCapture, &QPlatformSurfaceCapture::errorOccurred, this,
                [this](QPlatformSurfaceCapture::Error error, QString errorString) {
                    emit errorOccurred(toScreenCaptureError(error), errorString);
                });
 
        connect(platformCapture,
                qOverload<QPlatformSurfaceCapture::ScreenSource>(
                        &QPlatformSurfaceCapture::sourceChanged),
                this, &QScreenCapture::screenChanged);
 
        d->platformScreenCapture.reset(platformCapture);
    }
}
 
QScreenCapture::~QScreenCapture()
{
    Q_D(QScreenCapture);
 
    // Reset platformScreenCapture in the destructor to avoid having broken ref in the object.
    d->platformScreenCapture.reset();
 
    if (d->captureSession)
        d->captureSession->setScreenCapture(nullptr);
}
 
QMediaCaptureSession *QScreenCapture::captureSession() const
{
    Q_D(const QScreenCapture);
 
    return d->captureSession;
}
 
void QScreenCapture::setActive(bool active)
{
    Q_D(QScreenCapture);
 
    if (d->platformScreenCapture)
        d->platformScreenCapture->setActive(active);
}
 
bool QScreenCapture::isActive() const
{
    Q_D(const QScreenCapture);
 
    return d->platformScreenCapture && d->platformScreenCapture->isActive();
}
 
void QScreenCapture::setScreen(QScreen *screen)
{
    Q_D(QScreenCapture);
 
    if (d->platformScreenCapture)
        d->platformScreenCapture->setSource(QPlatformSurfaceCapture::ScreenSource(screen));
}
 
QScreen *QScreenCapture::screen() const
{
    Q_D(const QScreenCapture);
 
    return d->platformScreenCapture
            ? d->platformScreenCapture->source<QPlatformSurfaceCapture::ScreenSource>()
            : nullptr;
}
 
QScreenCapture::Error QScreenCapture::error() const
{
    Q_D(const QScreenCapture);
 
    return d->platformScreenCapture ? toScreenCaptureError(d->platformScreenCapture->error())
                                    : CapturingNotSupported;
}
 
QString QScreenCapture::errorString() const
{
    Q_D(const QScreenCapture);
 
    return d->platformScreenCapture ? d->platformScreenCapture->errorString()
                                    : QLatin1StringView("Capturing is not support on this platform");
}
void QScreenCapture::setCaptureSession(QMediaCaptureSession *captureSession)
{
    Q_D(QScreenCapture);
 
    d->captureSession = captureSession;
}
 
class QPlatformSurfaceCapture *QScreenCapture::platformScreenCapture() const
{
    Q_D(const QScreenCapture);
 
    return d->platformScreenCapture.get();
}
 
QT_END_NAMESPACE
 
#include "moc_qscreencapture.cpp"