Fix #9641 (broken contrast enhancement)

wonder-sk · wonder-sk · commit 71a799f0c199 · 2014-02-25T16:03:24.000+07:00
diff --git a/src/core/raster/qgscontrastenhancement.cpp b/src/core/raster/qgscontrastenhancement.cpp
@@ -63,7 +63,7 @@ QgsContrastEnhancement::QgsContrastEnhancement( const QgsContrastEnhancement& ce
   mMaximumValue = ce.mMaximumValue;
   mRasterDataTypeRange = ce.mRasterDataTypeRange;
 
-  mLookupTableOffset = mMinimumValue * -1;
+  mLookupTableOffset = minimumValuePossible( mRasterDataType ) * -1;
 
   // setContrastEnhancementAlgorithm sets also QgsContrastEnhancementFunction
   setContrastEnhancementAlgorithm( ce.mContrastEnhancementAlgorithm, false );
