Example #1
0
        //---------------------------------------------------------------------

        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]
            }
        }
Example #2
0
        //---------------------------------------------------------------------

        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));;
            }
        }