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39
40#include "qdeclarativecamerapreviewprovider_p.h"
41#include <QtCore/qmutex.h>
42#include <QtCore/qdebug.h>
43
44QT_BEGIN_NAMESPACE
45
46struct QDeclarativeCameraPreviewProviderPrivate
47{
48 QString id;
49 QImage image;
50 QMutex mutex;
51};
52
53Q_GLOBAL_STATIC(QDeclarativeCameraPreviewProviderPrivate, qDeclarativeCameraPreviewProviderPrivate)
54
55QDeclarativeCameraPreviewProvider::QDeclarativeCameraPreviewProvider()
56: QQuickImageProvider(QQuickImageProvider::Image)
57{
58}
59
60QDeclarativeCameraPreviewProvider::~QDeclarativeCameraPreviewProvider()
61{
62 QDeclarativeCameraPreviewProviderPrivate *d = qDeclarativeCameraPreviewProviderPrivate();
63 QMutexLocker lock(&d->mutex);
64 d->id.clear();
65 d->image = QImage();
66}
67
68QImage QDeclarativeCameraPreviewProvider::requestImage(const QString &id, QSize *size, const QSize& requestedSize)
69{
70 QDeclarativeCameraPreviewProviderPrivate *d = qDeclarativeCameraPreviewProviderPrivate();
71 QMutexLocker lock(&d->mutex);
72
73 if (d->id != id)
74 return QImage();
75
76 QImage res = d->image;
77 if (!requestedSize.isEmpty())
78 res = res.scaled(s: requestedSize, aspectMode: Qt::KeepAspectRatio, mode: Qt::SmoothTransformation);
79
80 if (size)
81 *size = res.size();
82
83 return res;
84}
85
86void QDeclarativeCameraPreviewProvider::registerPreview(const QString &id, const QImage &preview)
87{
88 //only the last preview is kept
89 QDeclarativeCameraPreviewProviderPrivate *d = qDeclarativeCameraPreviewProviderPrivate();
90 QMutexLocker lock(&d->mutex);
91 d->id = id;
92 d->image = preview;
93}
94
95QT_END_NAMESPACE
96

source code of qtmultimedia/src/imports/multimedia/qdeclarativecamerapreviewprovider.cpp