[gdal-dev] convert one band data in rgba

[Kees Kling]

Hi,

I want to convert an indexed image to  a rgba color image with help of a 
colortable

so I created a GDALDataset

drv = (GDALDriver *) GDALGetDriverByName("MEM");
if (!drv) {
      throw "Unable to register GDAL Memory Driver";
}
GDALDataset* tmpdata = 
drv->Create("rawRadar",mysqlData.columns,mysqlData.rows,1,GDT_Byte,NULL);

// Added the colortable
CPLErr err = tmpdata->GetRasterBand(1)->SetColorTable(cTable);

// Inserted the data from a byte array
tmpdata->RasterIO(GF_Write,0,0,mysqlData.columns,mysqlData.rows,
             (unsigned char 
*)mysqlData.data.c_str(),mysqlData.columns,mysqlData.rows,
             GDT_Byte,1, NULL, 0, 0,0);

 From here on I'm stuck.
How do I go on to convert this data to a in memory GDALDataset with 4 
channels (R,G,B,A)

Thanks

Kees Kling