summaryrefslogtreecommitdiff
path: root/src/imports/multimedia/qdeclarativecameraexposure.cpp
blob: 92972e51264f2e2deaa47e3b569cf5b2a0c7e186 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdeclarativecamera_p.h"
#include "qdeclarativecameraexposure_p.h"

QT_BEGIN_NAMESPACE

/*!
    \qmltype CameraExposure
    \instantiates QDeclarativeCameraExposure
    \brief An interface for exposure related camera settings.
    \ingroup multimedia_qml
    \ingroup camera_qml
    \inqmlmodule QtMultimedia

    CameraExposure allows you to adjust exposure related settings
    like aperture and shutter speed, metering and ISO speed.

    It should not be constructed separately, instead the
    \c exposure property of the a \l Camera should be used.

    \qml

    Camera {
        id: camera

        exposure.exposureCompensation: -1.0
        exposure.exposureMode: Camera.ExposurePortrait
    }

    \endqml

    Several settings have both an automatic and a manual mode.  In
    the automatic modes the camera software itself will decide what
    a reasonable setting is, but in most cases these settings can
    be overridden with a specific manual setting.

    For example, to select automatic shutter speed selection:

    \code
        camera.exposure.setAutoShutterSpeed()
    \endcode

    Or for a specific shutter speed:

    \code
        camera.exposure.manualShutterSpeed = 0.01 // 10ms
    \endcode

    You can only choose one or the other mode.
*/

/*!
    \internal
    \class QDeclarativeCameraExposure
    \brief The CameraExposure provides interface for exposure related camera settings.

*/

/*!
    Construct a declarative camera exposure object using \a parent object.
 */
QDeclarativeCameraExposure::QDeclarativeCameraExposure(QCamera *camera, QObject *parent) :
    QObject(parent)
{
    m_exposure = camera->exposure();

    connect(m_exposure, SIGNAL(isoSensitivityChanged(int)), this, SIGNAL(isoSensitivityChanged(int)));
    connect(m_exposure, SIGNAL(apertureChanged(qreal)), this, SIGNAL(apertureChanged(qreal)));
    connect(m_exposure, SIGNAL(shutterSpeedChanged(qreal)), this, SIGNAL(shutterSpeedChanged(qreal)));

    connect(m_exposure, SIGNAL(exposureCompensationChanged(qreal)), this, SIGNAL(exposureCompensationChanged(qreal)));
}

QDeclarativeCameraExposure::~QDeclarativeCameraExposure()
{
}
/*!
    \property QDeclarativeCameraExposure::exposureCompensation

    This property holds the adjustment value for the automatically calculated exposure. The value is in EV units.
 */
/*!
    \qmlproperty real QtMultimedia::CameraExposure::exposureCompensation

    This property holds the adjustment value for the automatically calculated exposure.  The value is
    in EV units.
 */
qreal QDeclarativeCameraExposure::exposureCompensation() const
{
    return m_exposure->exposureCompensation();
}

void QDeclarativeCameraExposure::setExposureCompensation(qreal ev)
{
    m_exposure->setExposureCompensation(ev);
}
/*!
    \property QDeclarativeCameraExposure::iso

    This property holds the sensor's ISO sensitivity value.
 */
/*!
    \qmlproperty int QtMultimedia::CameraExposure::iso

    This property holds the sensor's ISO sensitivity value.
 */
int QDeclarativeCameraExposure::isoSensitivity() const
{
    return m_exposure->isoSensitivity();
}
/*!
    \property QDeclarativeCameraExposure::shutterSpeed

    This property holds the camera's shutter speed value in seconds.
    To affect the shutter speed you can use the \l manualShutterSpeed
    property and \l setAutoShutterSpeed().

*/
/*!
    \qmlproperty real QtMultimedia::CameraExposure::shutterSpeed

    This property holds the camera's current shutter speed value in seconds.
    To affect the shutter speed you can use the \l manualShutterSpeed
    property and \l setAutoShutterSpeed().

*/
qreal QDeclarativeCameraExposure::shutterSpeed() const
{
    return m_exposure->shutterSpeed();
}
/*!
    \property QDeclarativeCameraExposure::aperture

    This property holds the current lens aperture as an F number (the ratio of the focal length to effective aperture diameter).

    \sa manualAperture, setAutoAperture()
*/
/*!
    \qmlproperty real QtMultimedia::CameraExposure::aperture

    This property holds the current lens aperture as an F number (the ratio of
    the focal length to effective aperture diameter).

    \sa manualAperture, setAutoAperture()
*/
qreal QDeclarativeCameraExposure::aperture() const
{
    return m_exposure->aperture();
}
/*!
    \property QDeclarativeCameraExposure::manualIso

    This property holds the ISO settings for capturing photos.

    If the value is negative, the camera will
    automatically determine an appropriate value.

    \sa iso, setAutoIsoSensitivity()
*/
/*!
    \qmlproperty real QtMultimedia::CameraExposure::manualIso

    This property holds the ISO settings for capturing photos.

    If a negative value is specified, the camera will
    automatically determine an appropriate value.

    \sa iso, setAutoIsoSensitivity()
*/

int QDeclarativeCameraExposure::manualIsoSensitivity() const
{
    return m_manualIso;
}

void QDeclarativeCameraExposure::setManualIsoSensitivity(int iso)
{
    m_manualIso = iso;
    if (iso > 0)
        m_exposure->setManualIsoSensitivity(iso);
    else
        m_exposure->setAutoIsoSensitivity();

    emit manualIsoSensitivityChanged(iso);
}
/*!
    \property QDeclarativeCameraExposure::manualShutterSpeed

    This property holds the shutter speed value (in seconds).
    If the value is less than zero, the camera automatically
    determines an appropriate shutter speed.

    \l shutterSpeed, setAutoShutterSpeed()
*/
/*!
    \qmlproperty real QtMultimedia::CameraExposure::manualShutterSpeed

    This property holds the shutter speed value (in seconds).
    If the value is less than zero, the camera automatically
    determines an appropriate shutter speed.

    \l shutterSpeed, setAutoShutterSpeed()
*/
qreal QDeclarativeCameraExposure::manualShutterSpeed() const
{
    return m_manualShutterSpeed;
}

void QDeclarativeCameraExposure::setManualShutterSpeed(qreal speed)
{
    m_manualShutterSpeed = speed;
    if (speed > 0)
        m_exposure->setManualShutterSpeed(speed);
    else
        m_exposure->setAutoShutterSpeed();

    emit manualShutterSpeedChanged(speed);
}
/*!
    \property QDeclarativeCameraExposure::manualAperture

    This property holds aperture (F number) value
    for capturing photos.

    If the value is less than zero,
    the camera automatically determines an appropriate aperture value.

    \l aperture, setAutoAperture()
*/
/*!
    \qmlproperty real QtMultimedia::CameraExposure::manualAperture

    This property holds the aperture (F number) value
    for capturing photos.

    If the value is less than zero, the camera automatically
    determines an appropriate aperture value.

    \l aperture, setAutoAperture()
*/
qreal QDeclarativeCameraExposure::manualAperture() const
{
    return m_manualAperture;
}

void QDeclarativeCameraExposure::setManualAperture(qreal aperture)
{
    m_manualAperture = aperture;
    if (aperture > 0)
        m_exposure->setManualAperture(aperture);
    else
        m_exposure->setAutoAperture();

    emit manualApertureChanged(aperture);
}

/*!
    \qmlmethod QtMultimedia::CameraExposure::setAutoAperture()
  Turn on auto aperture selection. The manual aperture value is reset to -1.0
 */
void QDeclarativeCameraExposure::setAutoAperture()
{
    setManualAperture(-1.0);
}

/*!
    \qmlmethod QtMultimedia::CameraExposure::setAutoShutterSpeed()
  Turn on auto shutter speed selection. The manual shutter speed value is reset to -1.0
 */
void QDeclarativeCameraExposure::setAutoShutterSpeed()
{
    setManualShutterSpeed(-1.0);
}

/*!
    \qmlmethod QtMultimedia::CameraExposure::setAutoIsoSensitivity()
  Turn on auto ISO sensitivity selection. The manual ISO value is reset to -1.
 */
void QDeclarativeCameraExposure::setAutoIsoSensitivity()
{
    setManualIsoSensitivity(-1);
}
/*!
    \property QDeclarativeCameraExposure::exposureMode

    This property holds the camera exposure mode. The mode can one of the values in \l QCameraExposure::ExposureMode.
*/
/*!
    \qmlproperty enumeration QtMultimedia::CameraExposure::exposureMode

    This property holds the camera exposure mode.

    The mode can be one of the following:

    \table
    \header \li Value \li Description
    \row \li Camera.ExposureManual        \li Manual mode.
    \row \li Camera.ExposureAuto          \li Automatic mode.
    \row \li Camera.ExposureNight         \li Night mode.
    \row \li Camera.ExposureBacklight     \li Backlight exposure mode.
    \row \li Camera.ExposureSpotlight     \li Spotlight exposure mode.
    \row \li Camera.ExposureSports        \li Spots exposure mode.
    \row \li Camera.ExposureSnow          \li Snow exposure mode.
    \row \li Camera.ExposureBeach         \li Beach exposure mode.
    \row \li Camera.ExposureLargeAperture \li Use larger aperture with small depth of field.
    \row \li Camera.ExposureSmallAperture \li Use smaller aperture.
    \row \li Camera.ExposurePortrait      \li Portrait exposure mode.
    \row \li Camera.ExposureAction        \li Action exposure mode.  Since 5.5
    \row \li Camera.ExposureLandscape     \li Landscape exposure mode.  Since 5.5
    \row \li Camera.ExposureNightPortrait \li Night portrait exposure mode.  Since 5.5
    \row \li Camera.ExposureTheatre       \li Theatre exposure mode.  Since 5.5
    \row \li Camera.ExposureSunset        \li Sunset exposure mode.  Since 5.5
    \row \li Camera.ExposureSteadyPhoto   \li Steady photo exposure mode.  Since 5.5
    \row \li Camera.ExposureFireworks     \li Fireworks exposure mode.  Since 5.5
    \row \li Camera.ExposureParty         \li Party exposure mode.  Since 5.5
    \row \li Camera.ExposureCandlelight   \li Candlelight exposure mode.  Since 5.5
    \row \li Camera.ExposureBarcode       \li Barcode exposure mode.  Since 5.5
    \row \li Camera.ExposureModeVendor    \li The base value for device specific exposure modes.
    \endtable
*/

QDeclarativeCameraExposure::ExposureMode QDeclarativeCameraExposure::exposureMode() const
{
    return QDeclarativeCameraExposure::ExposureMode(m_exposure->exposureMode());
}

void QDeclarativeCameraExposure::setExposureMode(QDeclarativeCameraExposure::ExposureMode mode)
{
    if (exposureMode() != mode) {
        m_exposure->setExposureMode(QCameraExposure::ExposureMode(mode));
        emit exposureModeChanged(exposureMode());
    }
}
/*!
    \property QDeclarativeCameraExposure::spotMeteringPoint

    This property holds the relative frame coordinates of the point to use
    for exposure metering. This point is only used in spot metering mode, and it
    typically defaults to the center \c (0.5, 0.5).
 */
/*!
    \qmlproperty QPointF QtMultimedia::CameraExposure::spotMeteringPoint

    The property holds the frame coordinates of the point to use for exposure metering.
    This point is only used in spot metering mode, and it typically defaults
    to the center \c (0.5, 0.5).
 */

QPointF QDeclarativeCameraExposure::spotMeteringPoint() const
{
    return m_exposure->spotMeteringPoint();
}

void QDeclarativeCameraExposure::setSpotMeteringPoint(const QPointF &point)
{
    QPointF oldPoint(spotMeteringPoint());
    m_exposure->setSpotMeteringPoint(point);

    if (oldPoint != spotMeteringPoint())
        emit spotMeteringPointChanged(spotMeteringPoint());
}
/*!
    \property QDeclarativeCameraExposure::meteringMode

    This property holds the camera metering mode (how exposure is balanced).
    The mode can be one of the constants in \l QCameraExposure::MeteringMode.
*/
/*!
    \qmlproperty enumeration QtMultimedia::CameraExposure::meteringMode

    This property holds the camera metering mode (how exposure is balanced).

    The mode can be one of the following:

    \table
    \header \li Value \li Description
    \row \li Camera.MeteringMatrix       \li A matrix of sample points is used to measure exposure.
    \row \li Camera.MeteringAverage      \li An average is used to measure exposure.
    \row \li Camera.MeteringSpot         \li A specific location (\l spotMeteringPoint) is used to measure exposure.
    \endtable
*/
QDeclarativeCameraExposure::MeteringMode QDeclarativeCameraExposure::meteringMode() const
{
    return QDeclarativeCameraExposure::MeteringMode(m_exposure->meteringMode());
}

void QDeclarativeCameraExposure::setMeteringMode(QDeclarativeCameraExposure::MeteringMode mode)
{
    QDeclarativeCameraExposure::MeteringMode oldMode = meteringMode();
    m_exposure->setMeteringMode(QCameraExposure::MeteringMode(mode));
    if (oldMode != meteringMode())
        emit meteringModeChanged(meteringMode());
}

QT_END_NAMESPACE

#include "moc_qdeclarativecameraexposure_p.cpp"