775 #define AVG(a,b)  ( ((((a)^(b)) & 0xfefefefeUL) >> 1) + ((a)&(b)) )

   775 #define AVG(a,b)  ( ((((a)^(b)) & 0xfefefefeUL) >> 1) + ((a)&(b)) )

   776 #define AVG16(a,b)  ( ((((a)^(b)) & 0xf7deUL) >> 1) + ((a)&(b)) )

   776 #define AVG16(a,b)  ( ((((a)^(b)) & 0xf7deUL) >> 1) + ((a)&(b)) )

   777 

   777 

   778 Q_GUI_EXPORT QImage qt_halfScaled(const QImage &source)

   778 Q_GUI_EXPORT QImage qt_halfScaled(const QImage &source)

   779 {

   779 {

   780     QImage srcImage = source;

   783     QImage srcImage = source;

   781 

   784 

   782     if (source.format() == QImage::Format_Indexed8) {

   785     if (source.format() == QImage::Format_Indexed8) {

   783         // assumes grayscale

   786         // assumes grayscale

   784         QImage dest(source.width() / 2, source.height() / 2, srcImage.format());

   787         QImage dest(source.width() / 2, source.height() / 2, srcImage.format());

   867     {

   870     {

   868         blurImage = blurImage.convertToFormat(QImage::Format_ARGB32_Premultiplied);

   871         blurImage = blurImage.convertToFormat(QImage::Format_ARGB32_Premultiplied);

   869     }

   872     }

   870 

   873 

   871     qreal scale = 1;

   874     qreal scale = 1;

   873         blurImage = qt_halfScaled(blurImage);

   876         blurImage = qt_halfScaled(blurImage);

   874         scale = 2;

   877         scale = 2;

   875         radius *= qreal(0.5);

   878         radius *= qreal(0.5);

   876     }

   879     }

   877 

   880