Fix bug in quantisation code. 8Bit has now a very good visual quality

mhugent · Marco Hugentobler · commit 45fe0ec812f1 · 2012-10-02T09:18:21.000+02:00
diff --git a/src/mapserver/qgshttprequesthandler.cpp b/src/mapserver/qgshttprequesthandler.cpp
@@ -751,7 +751,7 @@ QRgb QgsHttpRequestHandler::boxColor( const QgsColorBox& box, int boxPixels )
   {
     currentColor = colorBoxIt->first;
     currentPixel = colorBoxIt->second;
-    weight = currentPixel / boxPixels;
+    weight = ( double )currentPixel / boxPixels;
     avRed += ( qRed( currentColor ) * weight );
     avGreen += ( qGreen( currentColor ) * weight );
     avBlue += ( qBlue( currentColor ) * weight );

Original file line number	Diff line number	Diff line change
`@@ -751,7 +751,7 @@ QRgb QgsHttpRequestHandler::boxColor( const QgsColorBox& box, int boxPixels )`
`751`	`751`	`{`
`752`	`752`	`currentColor = colorBoxIt->first;`
`753`	`753`	`currentPixel = colorBoxIt->second;`
`754`		`- weight = currentPixel / boxPixels;`
	`754`	`+ weight = ( double )currentPixel / boxPixels;`
`755`	`755`	`avRed += ( qRed( currentColor ) * weight );`
`756`	`756`	`avGreen += ( qGreen( currentColor ) * weight );`
`757`	`757`	`avBlue += ( qBlue( currentColor ) * weight );`