Fix #11455 (Crash when setting transparency for WMS layer)

Layer transparency instance was not copied when renderers were cloned.

Author: wonder-sk

src/core/raster/qgsmultibandcolorrenderer.cpp

@@ -57,7 +57,7 @@ QgsRasterInterface * QgsMultiBandColorRenderer::clone() const
   }
   renderer->setOpacity( mOpacity );
   renderer->setAlphaBand( mAlphaBand );
-  renderer->setRasterTransparency( mRasterTransparency );
+  renderer->setRasterTransparency( new QgsRasterTransparency( *mRasterTransparency ) );
 
   return renderer;
 }

src/core/raster/qgspalettedrasterrenderer.cpp

@@ -51,7 +51,7 @@ QgsRasterInterface * QgsPalettedRasterRenderer::clone() const
   QgsPalettedRasterRenderer * renderer = new QgsPalettedRasterRenderer( 0, mBand, rgbArray(), mNColors );
   renderer->setOpacity( mOpacity );
   renderer->setAlphaBand( mAlphaBand );
-  renderer->setRasterTransparency( mRasterTransparency );
+  renderer->setRasterTransparency( new QgsRasterTransparency( *mRasterTransparency ) );
   renderer->mLabels = mLabels;
   return renderer;
 }

src/core/raster/qgssinglebandcolordatarenderer.cpp

@@ -16,6 +16,7 @@
  ***************************************************************************/
 
 #include "qgssinglebandcolordatarenderer.h"
+#include "qgsrastertransparency.h"
 #include "qgsrasterviewport.h"
 #include <QDomDocument>
 #include <QDomElement>
@@ -36,7 +37,7 @@ QgsRasterInterface * QgsSingleBandColorDataRenderer::clone() const
   QgsSingleBandColorDataRenderer * renderer = new QgsSingleBandColorDataRenderer( 0, mBand );
   renderer->setOpacity( mOpacity );
   renderer->setAlphaBand( mAlphaBand );
-  renderer->setRasterTransparency( mRasterTransparency );
+  renderer->setRasterTransparency( new QgsRasterTransparency( *mRasterTransparency ) );
   return renderer;
 }
 

src/core/raster/qgssinglebandgrayrenderer.cpp

@@ -37,7 +37,7 @@ QgsRasterInterface * QgsSingleBandGrayRenderer::clone() const
   QgsSingleBandGrayRenderer * renderer = new QgsSingleBandGrayRenderer( 0, mGrayBand );
   renderer->setOpacity( mOpacity );
   renderer->setAlphaBand( mAlphaBand );
-  renderer->setRasterTransparency( mRasterTransparency );
+  renderer->setRasterTransparency( new QgsRasterTransparency( *mRasterTransparency ) );
   renderer->setGradient( mGradient );
   if ( mContrastEnhancement )
   {

src/core/raster/qgssinglebandpseudocolorrenderer.cpp

@@ -63,7 +63,7 @@ QgsRasterInterface * QgsSingleBandPseudoColorRenderer::clone() const
 
   renderer->setOpacity( mOpacity );
   renderer->setAlphaBand( mAlphaBand );
-  renderer->setRasterTransparency( mRasterTransparency );
+  renderer->setRasterTransparency( new QgsRasterTransparency( *mRasterTransparency ) );
 
   return renderer;
 }