//---------------------------------------------------------------------
public T this[int row,
int column]
{
set {
byte[] bytes = toBytes(value);
// TODO: The logic below is a crude write-one-pixel at a
// time approach. But hey, it works. Eventually, we need
// to use the block-sized buffer of the base class for
// performance. The trick is that we need will likely be
// filling more than one block at a time (if raster XSize
// > BlockXSize). How? Multiple buffers in the base class?
// Or multiple buffers at this class level?
Gdal.CPLErr result = gdalBand.RasterIO(Gdal.RWFlag.Write,
column - 1,
row - 1,
bytes.Length,
1,
bytes,
bytes.Length,
1,
PixelType.GDALType,
0, // pixelSpace
0); // lineSpace
// Will the call above work for a partial block? e.g.,
// raster's XSize does not divide evenly by BlockXSize
if (result != Gdal.CPLErr.None)
{
throw new System.ApplicationException();
}
// TODO: define a Landis.Raster.Exception class
// TODO: maybe create a function to create a
// Landis.Raster.Exception, and fills it in
// with info from CPLGetLastError[No|Type|Msg]
}
}
//---------------------------------------------------------------------
public T this[int row,
int column]
{
get {
int index;
BlockLocation desiredBlockLoc = GetBlockLocation(row,
column,
out index);
if (desiredBlockLoc != currentBlockLoc)
{
Gdal.CPLErr result = gdalBand.RasterIO(Gdal.RWFlag.Read,
column - 1,
row - 1,
BlockXSize,
BlockYSize,
buffer,
BlockXSize,
BlockYSize,
PixelType.GDALType,
0, // pixelSpace
0); // lineSpace
// Will the call above work for a partial block? e.g.,
// raster's XSize does not divide evenly by BlockXSize
if (result != Gdal.CPLErr.None)
{
throw new System.ApplicationException();
}
// TODO: define a Landis.Raster.Exception class
// TODO: maybe create a function to create a
// Landis.Raster.Exception, and fills it in
// with info from CPLGetLastError[No|Type|Msg]
currentBlockLoc = desiredBlockLoc;
}
return(fromBytes(buffer, index));;
}
}