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>

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

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

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.
  */

src/multimedia/controls/qcameraimageprocessingcontrol.h

@@ -66,6 +66,7 @@ public:
         BrightnessAdjustment,
         SharpeningAdjustment,
         DenoisingAdjustment,
+        ColorFilter,
         ExtendedParameter = 1000
     };