protected override void DirectRead(int xOffset, int yOffset, int xSize, int ySize, IntPtr buffer, enumDataType dataType, int xBufferSize, int yBufferSize)
{
if (xSize == xBufferSize && ySize == yBufferSize)
{
int[] start = new int[] { yOffset, xOffset };
int[] edges = new int[] { ySize, xSize };
_sds.Read(start, null, edges, buffer);
}
else
{
}
}
private void TestHelper()
{
int major_v;
int minor_v;
int release;
StringBuilder libraryversion = new StringBuilder();
HDF4API.Hgetlibversion(out major_v, out minor_v, out release, libraryversion);
string fullfilename = @"E:\Smart\CloudArgs\cloudsat\2007101034511_05065_CS_2B-GEOPROF_GRANULE_P_R04_E02.hdf";
int file_id = HDF4API.Hopen(fullfilename, DFACC.DFACC_READ, 0);
HDF4API.Hgetfileversion(file_id, out major_v, out minor_v, out release, libraryversion);
H4File hdf = new H4File(null, null, null, null);
hdf.Load(fullfilename);
//测试读取的全局属性
for (int i = 0; i < hdf.Num_Global_Attrs; i++)
{
dynamic attValue = hdf.GlobalAttrs[i].Value;
}
//测试读取的科学数据集及其属性
for (int i = 0; i < hdf.Num_Datasets; i++)
{
H4SDS sd = hdf.Datasets[i];
HDFAttribute[] attrs = sd.SDAttributes;
if (sd.Rank == 2)
{
int buffersize = (int)sd.Dimsizes[0] * sd.Dimsizes[1];
int typesize = HDFDataType.GetSize(sd.Datatype);
IntPtr ptr = Marshal.AllocHGlobal(buffersize * typesize);
sd.Read(new int[] { 0, 0 }, null, sd.Dimsizes, ptr);
short[] buffer = new short[buffersize];
Marshal.Copy(ptr, buffer, 0, buffersize);
Marshal.FreeHGlobal(ptr);
}
}
//测试读取的Vdata
}