Wrong No Data Value

[sgamperl]

The NullPixelValue Property of the OSGeo.FDO.Raster.IRaster interface is always 0 if i use the WMS Provider.

I think the code in the function _getNullPixelValue() in FdoWMSImage.cpp is wrong.

determine the bits per pixel double null_val = m_bands[0]->GetNoDataValue(&bSuccess); if (!bSuccess)

null_val = 0;

If a palette is used in the WMS and then the first color in the palette would be the no data value. That's wrong.

A NoDataValue of 0 is a valid value. It shouldn't be set in this function if bSuccess == false.

From outside I can check with the raster.NullPixelValue.IsNull() function if it has a correct value.

Is there a workaround for the problem?