private void CheckArgIsOK(IRasterDataProvider dataProvider, CutArgument args)
{
if (dataProvider == null)
{
throw new ArgumentNullException("dataProvider");
}
if (args == null)
{
throw new ArgumentNullException("args");
}
string error = null;
if (!args.IsOK(out error))
{
throw new ArgumentException(error);
}
if (args.BandNos == null)
{
args.BandNos = new int[dataProvider.BandCount];
for (int b = 1; b <= dataProvider.BandCount; b++)
{
args.BandNos[b - 1] = b;
}
}
else
{
foreach (int bNo in args.BandNos)
{
if (bNo < 1 || bNo > dataProvider.BandCount)
{
throw new ArgumentOutOfRangeException("BandNos");
}
}
}
}
private object[] GetOptions(IRasterDataProvider dataProvider, CutArgument args, BlockItem item, out string extName, CoordEnvelope evp)
{
extName = null;
List <object> options = new List <object>();
if (args.Driver == "LDF")
{
extName = ".ldf";
if (dataProvider.SpatialRef != null)
{
string spRef = "SPATIALREF=" + dataProvider.SpatialRef.ToProj4String();
options.Add(spRef);
}
string mapInf = evp.ToMapInfoString(new Size(item.Width, item.Height));
options.Add(mapInf);
}
return(options.Count > 0 ? options.ToArray() : null);
}
private void Cut(IRasterDataProvider srcDataProvider, IRasterDataProvider dstDataProvider, CutArgument args, BlockItem item, Action <int, string> progressTracker)
{
int rowsOfBlock;
byte[] buffer = TryBuildBlockBuffer(dstDataProvider, out rowsOfBlock);
int bRow = 0;
int eRow = rowsOfBlock;
int actualRows = 0;
GCHandle handle = GCHandle.Alloc(_buffer, GCHandleType.Pinned);
int srcX = item.Left;
int srcY = item.Top;
try
{
IntPtr ptr = handle.AddrOfPinnedObject();
do
{
actualRows = eRow - bRow;
//
foreach (int bNo in args.BandNos)
{
srcDataProvider.GetRasterBand(bNo).Read(srcX, srcY + bRow, item.Width,
actualRows, ptr, srcDataProvider.DataType, dstDataProvider.Width, actualRows);
dstDataProvider.GetRasterBand(bNo).Write(0, bRow, dstDataProvider.Width, actualRows, ptr, dstDataProvider.DataType, dstDataProvider.Width, actualRows);
}
//
bRow += rowsOfBlock;
eRow = Math.Min(bRow + rowsOfBlock, srcDataProvider.Height);
}while (eRow < dstDataProvider.Height);
}
finally
{
handle.Free();
}
}
