Add a color filter property to QCameraImageProcessing.

[ChangeLog] New color filter property for QCameraImageProcessing.

Change-Id: I999e349e3e4f284b533fa62ba50903fbd21cb400
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

9 files changed, 212 insertions, 7 deletions

diff --git a/src/imports/multimedia/multimedia.cpp b/src/imports/multimedia/multimedia.cpp
index 80dc4f82c..01b037a79 100644
--- a/src/imports/multimedia/multimedia.cpp
+++ b/src/imports/multimedia/multimedia.cpp
@@ -103,6 +103,9 @@ public:
         qmlRegisterUncreatableType<QDeclarativeCameraViewfinder>(uri, 5, 4, "CameraViewfinder",
                                 trUtf8("CameraViewfinder is provided by Camera"));
 
+        // 5.5 types
+        qmlRegisterUncreatableType<QDeclarativeCameraImageProcessing, 1>(uri, 5, 5, "CameraImageProcessing", trUtf8("CameraImageProcessing is provided by Camera"));
+
         qmlRegisterType<QDeclarativeMediaMetaData>();
     }
 
diff --git a/src/imports/multimedia/qdeclarativecameraimageprocessing.cpp b/src/imports/multimedia/qdeclarativecameraimageprocessing.cpp
index 26bac6ed4..d6d555887 100644
--- a/src/imports/multimedia/qdeclarativecameraimageprocessing.cpp
+++ b/src/imports/multimedia/qdeclarativecameraimageprocessing.cpp
@@ -220,6 +220,42 @@ void QDeclarativeCameraImageProcessing::setDenoisingLevel(qreal value)
 }
 
 /*!
+    \qmlproperty QtMultimedia::CameraImageProcessing::colorFilter
+
+    This property holds which color filter if any will be applied to image data captured by the camera.
+
+    It can be one of:
+
+    \table
+    \row \li CameraImageProcessing.ColorFilterNone       \li No filter is applied to images.
+    \row \li CameraImageProcessing.ColorFilterGrayscale  \li A grayscale filter.
+    \row \li CameraImageProcessing.ColorFilterNegative   \li A negative filter.
+    \row \li CameraImageProcessing.ColorFilterSolarize   \li A solarize filter.
+    \row \li CameraImageProcessing.ColorFilterSepia      \li A sepia filter.
+    \row \li CameraImageProcessing.ColorFilterPosterize  \li A posterize filter.
+    \row \li CameraImageProcessing.ColorFilterWhiteboard \li A whiteboard filter.
+    \row \li CameraImageProcessing.ColorFilterBlackboard \li A blackboard filter.
+    \row \li CameraImageProcessing.ColorFilterAqua       \li An aqua filter.
+    \row \li CameraImageProcessing.ColorFilterVendor     \li The base value for vendor defined filters.
+    \endtable
+
+    \since 5.5
+*/
+
+QDeclarativeCameraImageProcessing::ColorFilter QDeclarativeCameraImageProcessing::colorFilter() const
+{
+    return ColorFilter(m_imageProcessing->colorFilter());
+}
+
+void QDeclarativeCameraImageProcessing::setColorFilter(ColorFilter filter)
+{
+    if (this->colorFilter() != filter) {
+        m_imageProcessing->setColorFilter(QCameraImageProcessing::ColorFilter(filter));
+        emit colorFilterChanged();
+    }
+}
+
+/*!
     \qmlsignal QtMultimedia::Camera::whiteBalanceModeChanged(Camera::WhiteBalanceMode)
     This signal is emitted when the \c whiteBalanceMode property is changed.
 
diff --git a/src/imports/multimedia/qdeclarativecameraimageprocessing_p.h b/src/imports/multimedia/qdeclarativecameraimageprocessing_p.h
index a7521f60e..65c607670 100644
--- a/src/imports/multimedia/qdeclarativecameraimageprocessing_p.h
+++ b/src/imports/multimedia/qdeclarativecameraimageprocessing_p.h
@@ -56,6 +56,7 @@ class QDeclarativeCameraImageProcessing : public QObject
 {
     Q_OBJECT
     Q_ENUMS(WhiteBalanceMode)
+    Q_ENUMS(ColorFilter)
 
     Q_PROPERTY(WhiteBalanceMode whiteBalanceMode READ whiteBalanceMode WRITE setWhiteBalanceMode NOTIFY whiteBalanceModeChanged)
     Q_PROPERTY(qreal manualWhiteBalance READ manualWhiteBalance WRITE setManualWhiteBalance NOTIFY manualWhiteBalanceChanged)
@@ -63,7 +64,7 @@ class QDeclarativeCameraImageProcessing : public QObject
     Q_PROPERTY(qreal saturation READ saturation WRITE setSaturation NOTIFY saturationChanged)
     Q_PROPERTY(qreal sharpeningLevel READ sharpeningLevel WRITE setSharpeningLevel NOTIFY sharpeningLevelChanged)
     Q_PROPERTY(qreal denoisingLevel READ denoisingLevel WRITE setDenoisingLevel NOTIFY denoisingLevelChanged)
-
+    Q_PROPERTY(ColorFilter colorFilter READ colorFilter WRITE setColorFilter NOTIFY colorFilterChanged REVISION 1)
 public:
     enum WhiteBalanceMode {
         WhiteBalanceAuto = QCameraImageProcessing::WhiteBalanceAuto,
@@ -78,6 +79,19 @@ public:
         WhiteBalanceVendor = QCameraImageProcessing::WhiteBalanceVendor
     };
 
+    enum ColorFilter {
+        ColorFilterNone = QCameraImageProcessing::ColorFilterNone,
+        ColorFilterGrayscale = QCameraImageProcessing::ColorFilterGrayscale,
+        ColorFilterNegative = QCameraImageProcessing::ColorFilterNegative,
+        ColorFilterSolarize = QCameraImageProcessing::ColorFilterSolarize,
+        ColorFilterSepia = QCameraImageProcessing::ColorFilterSepia,
+        ColorFilterPosterize = QCameraImageProcessing::ColorFilterPosterize,
+        ColorFilterWhiteboard = QCameraImageProcessing::ColorFilterWhiteboard,
+        ColorFilterBlackboard = QCameraImageProcessing::ColorFilterBlackboard,
+        ColorFilterAqua = QCameraImageProcessing::ColorFilterAqua,
+        ColorFilterVendor = QCameraImageProcessing::ColorFilterVendor
+    };
+
     ~QDeclarativeCameraImageProcessing();
 
     WhiteBalanceMode whiteBalanceMode() const;
@@ -88,6 +102,8 @@ public:
     qreal sharpeningLevel() const;
     qreal denoisingLevel() const;
 
+    ColorFilter colorFilter() const;
+
 public Q_SLOTS:
     void setWhiteBalanceMode(QDeclarativeCameraImageProcessing::WhiteBalanceMode mode) const;
     void setManualWhiteBalance(qreal colorTemp) const;
@@ -97,6 +113,8 @@ public Q_SLOTS:
     void setSharpeningLevel(qreal value);
     void setDenoisingLevel(qreal value);
 
+    void setColorFilter(ColorFilter colorFilter);
+
 Q_SIGNALS:
     void whiteBalanceModeChanged(QDeclarativeCameraImageProcessing::WhiteBalanceMode) const;
     void manualWhiteBalanceChanged(qreal) const;
@@ -106,6 +124,8 @@ Q_SIGNALS:
     void sharpeningLevelChanged(qreal);
     void denoisingLevelChanged(qreal);
 
+    void colorFilterChanged();
+
 private:
     friend class QDeclarativeCamera;
     QDeclarativeCameraImageProcessing(QCamera *camera, QObject *parent = 0);
diff --git a/src/multimedia/camera/qcameraimageprocessing.cpp b/src/multimedia/camera/qcameraimageprocessing.cpp
index 35ea7f6d1..307fae522 100644
--- a/src/multimedia/camera/qcameraimageprocessing.cpp
+++ b/src/multimedia/camera/qcameraimageprocessing.cpp
@@ -49,6 +49,7 @@ QT_BEGIN_NAMESPACE
 static void qRegisterCameraImageProcessingMetaTypes()
         {
             qRegisterMetaType<QCameraImageProcessing::WhiteBalanceMode>();
+            qRegisterMetaType<QCameraImageProcessing::ColorFilter>();
         }
 
 Q_CONSTRUCTOR_FUNCTION(qRegisterCameraImageProcessingMetaTypes)
@@ -317,5 +318,63 @@ void QCameraImageProcessing::setDenoisingLevel(qreal level)
     \value WhiteBalanceVendor       Base value for vendor defined white balance modes.
 */
 
+/*!
+    \enum QCameraImageProcessing::Filter
+
+    \value ColorFilterNone               No filter is applied to images.
+    \value ColorFilterGrayscale          A grayscale filter.
+    \value ColorFilterNegative           A negative filter.
+    \value ColorFilterSolarize           A solarize filter.
+    \value ColorFilterSepia              A sepia filter.
+    \value ColorFilterPosterize          A posterize filter.
+    \value ColorFilterWhiteboard         A whiteboard filter.
+    \value ColorFilterBlackboard         A blackboard filter.
+    \value ColorFilterAqua               An aqua filter.
+    \value ColorFilterVendor             The base value for vendor defined filters.
+
+    \since 5.5
+*/
+
+/*!
+    Returns the color filter which will be applied to image data captured by the camera.
+
+    \since 5.5
+*/
+
+QCameraImageProcessing::ColorFilter QCameraImageProcessing::colorFilter() const
+{
+    return d_func()->imageControl->parameter(QCameraImageProcessingControl::ColorFilter)
+            .value<QCameraImageProcessing::ColorFilter>();
+}
+
+
+/*!
+    Sets the color \a filter which will be applied to image data captured by the camera.
+
+    \since 5.5
+*/
+
+void QCameraImageProcessing::setColorFilter(QCameraImageProcessing::ColorFilter filter)
+{
+    d_func()->imageControl->setParameter(
+                QCameraImageProcessingControl::ColorFilter,
+                QVariant::fromValue<QCameraImageProcessing::ColorFilter>(filter));
+}
+
+/*!
+    Returns true if a color \a filter is supported.
+
+    \since 5.5
+*/
+
+bool QCameraImageProcessing::isColorFilterSupported(QCameraImageProcessing::ColorFilter filter) const
+{
+    return d_func()->imageControl->isParameterValueSupported(
+                QCameraImageProcessingControl::ColorFilter,
+                QVariant::fromValue<QCameraImageProcessing::ColorFilter>(filter));
+
+}
+
+
 #include "moc_qcameraimageprocessing.cpp"
 QT_END_NAMESPACE
diff --git a/src/multimedia/camera/qcameraimageprocessing.h b/src/multimedia/camera/qcameraimageprocessing.h
index 4c3f71dcd..044e05f7c 100644
--- a/src/multimedia/camera/qcameraimageprocessing.h
+++ b/src/multimedia/camera/qcameraimageprocessing.h
@@ -54,7 +54,7 @@ class QCameraImageProcessingPrivate;
 class Q_MULTIMEDIA_EXPORT QCameraImageProcessing : public QObject
 {
     Q_OBJECT
-    Q_ENUMS(WhiteBalanceMode)
+    Q_ENUMS(WhiteBalanceMode ColorFilter)
 public:
     enum WhiteBalanceMode {
         WhiteBalanceAuto = 0,
@@ -69,6 +69,19 @@ public:
         WhiteBalanceVendor = 1000
     };
 
+    enum ColorFilter {
+        ColorFilterNone,
+        ColorFilterGrayscale,
+        ColorFilterNegative,
+        ColorFilterSolarize,
+        ColorFilterSepia,
+        ColorFilterPosterize,
+        ColorFilterWhiteboard,
+        ColorFilterBlackboard,
+        ColorFilterAqua,
+        ColorFilterVendor = 1000
+    };
+
     bool isAvailable() const;
 
     WhiteBalanceMode whiteBalanceMode() const;
@@ -90,6 +103,10 @@ public:
     qreal denoisingLevel() const;
     void setDenoisingLevel(qreal value);
 
+    ColorFilter colorFilter() const;
+    void setColorFilter(ColorFilter filter);
+    bool isColorFilterSupported(ColorFilter filter) const;
+
 private:
     friend class QCamera;
     friend class QCameraPrivate;
@@ -104,7 +121,9 @@ private:
 QT_END_NAMESPACE
 
 Q_DECLARE_METATYPE(QCameraImageProcessing::WhiteBalanceMode)
+Q_DECLARE_METATYPE(QCameraImageProcessing::ColorFilter)
 
 Q_MEDIA_ENUM_DEBUG(QCameraImageProcessing, WhiteBalanceMode)
+Q_MEDIA_ENUM_DEBUG(QCameraImageProcessing, ColorFilter)
 
 #endif  // QCAMERAIMAGEPROCESSING_H
diff --git a/src/multimedia/controls/qcameraimageprocessingcontrol.cpp b/src/multimedia/controls/qcameraimageprocessingcontrol.cpp
index 757f6e33d..859cab67e 100644
--- a/src/multimedia/controls/qcameraimageprocessingcontrol.cpp
+++ b/src/multimedia/controls/qcameraimageprocessingcontrol.cpp
@@ -171,6 +171,8 @@ QCameraImageProcessingControl::~QCameraImageProcessingControl()
     Adjustment of sharpening applied.
   \value DenoisingAdjustment
     Adjustment of denoising applied.
+  \value ColorFilter
+    Image filter applied.  Since 5.5
   \value ExtendedParameter
     The base value for platform specific extended parameters.
  */
diff --git a/src/multimedia/controls/qcameraimageprocessingcontrol.h b/src/multimedia/controls/qcameraimageprocessingcontrol.h
index 81409b6a6..0f9d2aed1 100644
--- a/src/multimedia/controls/qcameraimageprocessingcontrol.h
+++ b/src/multimedia/controls/qcameraimageprocessingcontrol.h
@@ -66,6 +66,7 @@ public:
         BrightnessAdjustment,
         SharpeningAdjustment,
         DenoisingAdjustment,
+        ColorFilter,
         ExtendedParameter = 1000
     };
 
diff --git a/src/plugins/gstreamer/camerabin/camerabinimageprocessing.cpp b/src/plugins/gstreamer/camerabin/camerabinimageprocessing.cpp
index 5e4b67b29..65b4af484 100644
--- a/src/plugins/gstreamer/camerabin/camerabinimageprocessing.cpp
+++ b/src/plugins/gstreamer/camerabin/camerabinimageprocessing.cpp
@@ -55,6 +55,30 @@ CameraBinImageProcessing::CameraBinImageProcessing(CameraBinSession *session)
       m_mappedWbValues[GST_PHOTOGRAPHY_WB_MODE_TUNGSTEN] = QCameraImageProcessing::WhiteBalanceTungsten;
       m_mappedWbValues[GST_PHOTOGRAPHY_WB_MODE_FLUORESCENT] = QCameraImageProcessing::WhiteBalanceFluorescent;
       unlockWhiteBalance();
+
+#if GST_CHECK_VERSION(1, 0, 0)
+      m_filterMap.insert(QCameraImageProcessing::ColorFilterNone, GST_PHOTOGRAPHY_COLOR_TONE_MODE_NORMAL);
+      if (m_session->photography()) {
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterSepia, GST_PHOTOGRAPHY_COLOR_TONE_MODE_SEPIA);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterGrayscale, GST_PHOTOGRAPHY_COLOR_TONE_MODE_GRAYSCALE);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterNegative, GST_PHOTOGRAPHY_COLOR_TONE_MODE_NEGATIVE);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterSolarize, GST_PHOTOGRAPHY_COLOR_TONE_MODE_SOLARIZE);
+#if GST_CHECK_VERSION(1, 2, 0)
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterPosterize, GST_PHOTOGRAPHY_COLOR_TONE_MODE_POSTERIZE);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterWhiteboard, GST_PHOTOGRAPHY_COLOR_TONE_MODE_WHITEBOARD);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterBlackboard, GST_PHOTOGRAPHY_COLOR_TONE_MODE_BLACKBOARD);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterAqua, GST_PHOTOGRAPHY_COLOR_TONE_MODE_AQUA);
+#endif
+      }
+#else
+      m_filterMap.insert(QCameraImageProcessing::ColorFilterNone, GST_PHOTOGRAPHY_COLOUR_TONE_MODE_NORMAL);
+      if (m_session->photography()) {
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterSepia, GST_PHOTOGRAPHY_COLOUR_TONE_MODE_SEPIA);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterGrayscale, GST_PHOTOGRAPHY_COLOUR_TONE_MODE_GRAYSCALE);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterNegative, GST_PHOTOGRAPHY_COLOUR_TONE_MODE_NEGATIVE);
+          m_filterMap.insert(QCameraImageProcessing::ColorFilterSolarize, GST_PHOTOGRAPHY_COLOUR_TONE_MODE_SOLARIZE);
+      }
+#endif
 #endif
 
     updateColorBalanceValues();
@@ -179,6 +203,14 @@ bool CameraBinImageProcessing::isParameterValueSupported(QCameraImageProcessingC
         return qAbs(value.toReal()) <= 1.0;
     case WhiteBalancePreset:
         return isWhiteBalanceModeSupported(value.value<QCameraImageProcessing::WhiteBalanceMode>());
+    case ColorFilter: {
+        const QCameraImageProcessing::ColorFilter filter = value.value<QCameraImageProcessing::ColorFilter>();
+#ifdef HAVE_GST_PHOTOGRAPHY
+        return m_filterMap.contains(filter);
+#else
+        return filter == QCameraImageProcessing::ColorFilterNone;
+#endif
+    }
     default:
         break;
     }
@@ -189,12 +221,28 @@ bool CameraBinImageProcessing::isParameterValueSupported(QCameraImageProcessingC
 QVariant CameraBinImageProcessing::parameter(
         QCameraImageProcessingControl::ProcessingParameter parameter) const
 {
-    if (parameter == QCameraImageProcessingControl::WhiteBalancePreset)
+    switch (parameter) {
+    case QCameraImageProcessingControl::WhiteBalancePreset:
         return QVariant::fromValue<QCameraImageProcessing::WhiteBalanceMode>(whiteBalanceMode());
-    else if (m_values.contains(parameter))
-        return m_values.value(parameter);
-    else
-        return QVariant();
+    case QCameraImageProcessingControl::ColorFilter:
+#ifdef HAVE_GST_PHOTOGRAPHY
+        if (GstPhotography *photography = m_session->photography()) {
+#if GST_CHECK_VERSION(1, 0, 0)
+            GstPhotographyColorToneMode mode = GST_PHOTOGRAPHY_COLOR_TONE_MODE_NORMAL;
+            gst_photography_get_color_tone_mode(photography, &mode);
+#else
+            GstColourToneMode mode = GST_PHOTOGRAPHY_COLOUR_TONE_MODE_NORMAL;
+            gst_photography_get_colour_tone_mode(photography, &mode);
+#endif
+            return QVariant::fromValue(m_filterMap.key(mode, QCameraImageProcessing::ColorFilterNone));
+        }
+#endif
+        return QVariant::fromValue(QCameraImageProcessing::ColorFilterNone);
+    default:
+        return m_values.contains(parameter)
+                ? QVariant(m_values.value(parameter))
+                : QVariant();
+    }
 }
 
 void CameraBinImageProcessing::setParameter(QCameraImageProcessingControl::ProcessingParameter parameter,
@@ -213,6 +261,21 @@ void CameraBinImageProcessing::setParameter(QCameraImageProcessingControl::Proce
     case WhiteBalancePreset:
         setWhiteBalanceMode(value.value<QCameraImageProcessing::WhiteBalanceMode>());
         break;
+    case QCameraImageProcessingControl::ColorFilter:
+#ifdef HAVE_GST_PHOTOGRAPHY
+        if (GstPhotography *photography = m_session->photography()) {
+#if GST_CHECK_VERSION(1, 0, 0)
+            gst_photography_set_color_tone_mode(photography, m_filterMap.value(
+                        value.value<QCameraImageProcessing::ColorFilter>(),
+                        GST_PHOTOGRAPHY_COLOR_TONE_MODE_NORMAL));
+#else
+            gst_photography_set_colour_tone_mode(photography, m_filterMap.value(
+                        value.value<QCameraImageProcessing::ColorFilter>(),
+                        GST_PHOTOGRAPHY_COLOUR_TONE_MODE_NORMAL));
+#endif
+        }
+#endif
+        break;
     default:
         break;
     }
diff --git a/src/plugins/gstreamer/camerabin/camerabinimageprocessing.h b/src/plugins/gstreamer/camerabin/camerabinimageprocessing.h
index 9a3c9513b..4f15c54e8 100644
--- a/src/plugins/gstreamer/camerabin/camerabinimageprocessing.h
+++ b/src/plugins/gstreamer/camerabin/camerabinimageprocessing.h
@@ -44,6 +44,7 @@
 # include <gst/interfaces/photography.h>
 # if !GST_CHECK_VERSION(1,0,0)
 typedef GstWhiteBalanceMode GstPhotographyWhiteBalanceMode;
+typedef GstColourToneMode GstPhotographyColorToneMode;
 # endif
 #endif
 
@@ -82,6 +83,7 @@ private:
     QMap<QCameraImageProcessingControl::ProcessingParameter, int> m_values;
 #ifdef HAVE_GST_PHOTOGRAPHY
     QMap<GstPhotographyWhiteBalanceMode, QCameraImageProcessing::WhiteBalanceMode> m_mappedWbValues;
+    QMap<QCameraImageProcessing::ColorFilter, GstPhotographyColorToneMode> m_filterMap;
 #endif
     QCameraImageProcessing::WhiteBalanceMode m_whiteBalanceMode;
 };