Move BlendMode enum and functions to QgsMapRenderer

Author: nyalldawson

src/app/qgsrasterlayerproperties.cpp

@@ -825,7 +825,7 @@ void QgsRasterLayerProperties::apply()
   }
 
   //set the blend mode for the layer
-  mRasterLayer->setBlendMode(( QgsMapLayer::BlendMode ) mBlendModeComboBox->blendMode() );
+  mRasterLayer->setBlendMode(( QgsMapRenderer::BlendMode ) mBlendModeComboBox->blendMode() );
 
   //get the thumbnail for the layer
   pixmapThumbnail->setPixmap( mRasterLayer->previewAsPixmap( pixmapThumbnail->size() ) );

src/core/qgsmaplayer.cpp

@@ -50,7 +50,7 @@ QgsMapLayer::QgsMapLayer( QgsMapLayer::LayerType type,
     mLayerOrigName( lyrname ), // store the original name
     mID( "" ),
     mLayerType( type ),
-    mBlendMode( QgsMapLayer::BlendNormal ) // Default to normal blending
+    mBlendMode( QgsMapRenderer::BlendNormal ) // Default to normal blending
 {
   mCRS = new QgsCoordinateReferenceSystem();
 
@@ -135,57 +135,17 @@ QgsRectangle QgsMapLayer::extent()
 }
 
 /** Write blend mode for layer */
-void QgsMapLayer::setBlendMode( const QgsMapLayer::BlendMode blendMode )
+void QgsMapLayer::setBlendMode( const QgsMapRenderer::BlendMode blendMode )
 {
   mBlendMode = blendMode;
 }
 
 /** Read blend mode for layer */
-QgsMapLayer::BlendMode QgsMapLayer::blendMode() const
+QgsMapRenderer::BlendMode QgsMapLayer::blendMode() const
 {
   return mBlendMode;
 }
 
-/** Returns a QPainter::CompositionMode corresponding to the current
- * blend mode for this layer
- */
-QPainter::CompositionMode QgsMapLayer::getCompositionMode()
-{
-  // Map QgsMapLayer::BlendNormal to QPainter::CompositionMode
-  switch ( mBlendMode )
-  {
-    case QgsMapLayer::BlendNormal:
-      return QPainter::CompositionMode_SourceOver;
-    case QgsMapLayer::BlendLighten:
-      return QPainter::CompositionMode_Lighten;
-    case QgsMapLayer::BlendScreen:
-      return QPainter::CompositionMode_Screen;
-    case QgsMapLayer::BlendDodge:
-      return QPainter::CompositionMode_ColorDodge;
-    case QgsMapLayer::BlendAddition:
-      return QPainter::CompositionMode_Plus;
-    case QgsMapLayer::BlendDarken:
-      return QPainter::CompositionMode_Darken;
-    case QgsMapLayer::BlendMultiply:
-      return QPainter::CompositionMode_Multiply;
-    case QgsMapLayer::BlendBurn:
-      return QPainter::CompositionMode_ColorBurn;
-    case QgsMapLayer::BlendOverlay:
-      return QPainter::CompositionMode_Overlay;
-    case QgsMapLayer::BlendSoftLight:
-      return QPainter::CompositionMode_SoftLight;
-    case QgsMapLayer::BlendHardLight:
-      return QPainter::CompositionMode_HardLight;
-    case QgsMapLayer::BlendDifference:
-      return QPainter::CompositionMode_Difference;
-    case QgsMapLayer::BlendSubtract:
-      return QPainter::CompositionMode_Exclusion;
-    default:
-      return QPainter::CompositionMode_SourceOver;
-  }
-}
-
-
 bool QgsMapLayer::draw( QgsRenderContext& rendererContext )
 {
   Q_UNUSED( rendererContext );

src/core/qgsmaplayer.h

@@ -29,6 +29,7 @@
 #include "qgis.h"
 #include "qgserror.h"
 #include "qgsrectangle.h"
+#include "qgsmaprenderer.h"
 
 class QgsRenderContext;
 class QgsCoordinateReferenceSystem;
@@ -54,26 +55,6 @@ class CORE_EXPORT QgsMapLayer : public QObject
       PluginLayer // added in 1.5
     };
 
-    /** Blending modes enum defining the available composition modes that can
-     * be used when rendering a layer
-     */
-    enum BlendMode
-    {
-      BlendNormal,
-      BlendLighten,
-      BlendScreen,
-      BlendDodge,
-      BlendAddition,
-      BlendDarken,
-      BlendMultiply,
-      BlendBurn,
-      BlendOverlay,
-      BlendSoftLight,
-      BlendHardLight,
-      BlendDifference,
-      BlendSubtract
-    };
-
     /** Constructor
      * @param type Type of layer as defined in QgsMapLayer::LayerType enum
      * @param lyrname Display Name of the layer
@@ -116,13 +97,9 @@ class CORE_EXPORT QgsMapLayer : public QObject
     const QString& abstract() const { return mAbstract; }
 
     /* Set the blending mode used for rendering a layer */
-    void setBlendMode( const QgsMapLayer::BlendMode blendMode );
+    void setBlendMode( const QgsMapRenderer::BlendMode blendMode );
     /* Returns the current blending mode for a layer */
-    QgsMapLayer::BlendMode blendMode() const;
-    /** Returns a QPainter::CompositionMode corresponding to the
-     * current blending mode for the layer
-     */
-    QPainter::CompositionMode getCompositionMode();
+    QgsMapRenderer::BlendMode blendMode() const;
 
     /**Synchronises with changes in the datasource
         @note added in version 1.6*/
@@ -494,7 +471,7 @@ class CORE_EXPORT QgsMapLayer : public QObject
     QgsMapLayer::LayerType mLayerType;
 
     /** Blend mode for the layer */
-    QgsMapLayer::BlendMode mBlendMode;
+    QgsMapRenderer::BlendMode mBlendMode;
 
     /** Tag for embedding additional information */
     QString mTag;

src/core/qgsmaprenderer.cpp

@@ -388,7 +388,7 @@ void QgsMapRenderer::render( QPainter* painter, double* forceWidthScale )
 
     // Set the QPainter composition mode so that this layer is rendered using
     // the desired blending mode
-    mypContextPainter->setCompositionMode( ml->getCompositionMode() );
+    mypContextPainter->setCompositionMode( getCompositionMode( ml->blendMode() ) );
 
     if ( !ml->hasScaleBasedVisibility() || ( ml->minimumScale() <= mScale && mScale < ml->maximumScale() ) || mOverview )
     {
@@ -1152,4 +1152,42 @@ const QgsCoordinateTransform* QgsMapRenderer::tr( QgsMapLayer *layer )
   return QgsCoordinateTransformCache::instance()->transform( layer->crs().authid(), mDestCRS->authid() );
 }
 
+/** Returns a QPainter::CompositionMode corresponding to a QgsMapRenderer::BlendMode
+ */
+QPainter::CompositionMode QgsMapRenderer::getCompositionMode( const QgsMapRenderer::BlendMode blendMode )
+{
+  // Map QgsMapRenderer::BlendNormal to QPainter::CompositionMode
+  switch ( blendMode )
+  {
+    case QgsMapRenderer::BlendNormal:
+      return QPainter::CompositionMode_SourceOver;
+    case QgsMapRenderer::BlendLighten:
+      return QPainter::CompositionMode_Lighten;
+    case QgsMapRenderer::BlendScreen:
+      return QPainter::CompositionMode_Screen;
+    case QgsMapRenderer::BlendDodge:
+      return QPainter::CompositionMode_ColorDodge;
+    case QgsMapRenderer::BlendAddition:
+      return QPainter::CompositionMode_Plus;
+    case QgsMapRenderer::BlendDarken:
+      return QPainter::CompositionMode_Darken;
+    case QgsMapRenderer::BlendMultiply:
+      return QPainter::CompositionMode_Multiply;
+    case QgsMapRenderer::BlendBurn:
+      return QPainter::CompositionMode_ColorBurn;
+    case QgsMapRenderer::BlendOverlay:
+      return QPainter::CompositionMode_Overlay;
+    case QgsMapRenderer::BlendSoftLight:
+      return QPainter::CompositionMode_SoftLight;
+    case QgsMapRenderer::BlendHardLight:
+      return QPainter::CompositionMode_HardLight;
+    case QgsMapRenderer::BlendDifference:
+      return QPainter::CompositionMode_Difference;
+    case QgsMapRenderer::BlendSubtract:
+      return QPainter::CompositionMode_Exclusion;
+    default:
+      return QPainter::CompositionMode_SourceOver;
+  }
+}
+
 bool QgsMapRenderer::mDrawing = false;

src/core/qgsmaprenderer.h

@@ -20,6 +20,7 @@
 #include <QSize>
 #include <QStringList>
 #include <QVector>
+#include <QPainter>
 
 #include "qgis.h"
 #include "qgsrectangle.h"
@@ -123,6 +124,26 @@ class CORE_EXPORT QgsMapRenderer : public QObject
       //MAP_UNITS probably supported in future versions
     };
 
+    /** Blending modes enum defining the available composition modes that can
+     * be used when rendering a layer
+     */
+    enum BlendMode
+    {
+      BlendNormal,
+      BlendLighten,
+      BlendScreen,
+      BlendDodge,
+      BlendAddition,
+      BlendDarken,
+      BlendMultiply,
+      BlendBurn,
+      BlendOverlay,
+      BlendSoftLight,
+      BlendHardLight,
+      BlendDifference,
+      BlendSubtract
+    };
+
     //! constructor
     QgsMapRenderer();
 
@@ -230,6 +251,9 @@ class CORE_EXPORT QgsMapRenderer : public QObject
     //! Added in QGIS v1.4
     void setLabelingEngine( QgsLabelingEngineInterface* iface );
 
+    //! Returns a QPainter::CompositionMode corresponding to a BlendMode
+    QPainter::CompositionMode getCompositionMode( const QgsMapRenderer::BlendMode blendMode );
+
   signals:
 
     void drawingProgress( int current, int total );

src/core/qgsvectorlayer.cpp

@@ -2265,7 +2265,7 @@ bool QgsVectorLayer::readSymbology( const QDomNode& node, QString& errorMessage
     if ( !blendModeNode.isNull() )
     {
       QDomElement e = blendModeNode.toElement();
-      setBlendMode(( QgsMapLayer::BlendMode ) e.text().toInt() );
+      setBlendMode(( QgsMapRenderer::BlendMode ) e.text().toInt() );
     }
 
     // use scale dependent visibility flag

src/core/raster/qgsrasterlayer.cpp

@@ -2317,7 +2317,7 @@ bool QgsRasterLayer::readSymbology( const QDomNode& layer_node, QString& errorMe
   if ( !blendModeNode.isNull() )
   {
     QDomElement e = blendModeNode.toElement();
-    setBlendMode(( QgsMapLayer::BlendMode ) e.text().toInt() );
+    setBlendMode(( QgsMapRenderer::BlendMode ) e.text().toInt() );
   }
 
   return true;

src/gui/symbology-ng/qgsrendererv2propertiesdialog.cpp

@@ -182,7 +182,7 @@ void QgsRendererV2PropertiesDialog::apply()
   }
 
   // set the blend mode for the layer
-  mLayer->setBlendMode(( QgsMapLayer::BlendMode ) mBlendModeComboBox->blendMode() );
+  mLayer->setBlendMode(( QgsMapRenderer::BlendMode ) mBlendModeComboBox->blendMode() );
 }
 
 void QgsRendererV2PropertiesDialog::onOK()