Hi,
I try to write a VTK compressed file (uncompressed works fine), but I
have the following error when I open it in Paraview:
ERROR: In /build/buildd/paraview-3.2.2/VTK/IO/vtkXMLDataParser.cxx, line
434
vtkXMLDataParser (0xa02c998): Error reading beginning of compression
header. Read 0 of 12 bytes.
ERROR: In
/build/buildd/paraview-3.2.2/VTK/IO/vtkXMLUnstructuredDataReader.cxx,
line 515
vtkXMLUnstructuredGridReader (0xa030228): Cannot read points array from
Points in piece 0. The data array in the element may be too short.
I don't understand what is wrong. I followed instructions from
(http://www.vtkedge.org/Wiki/VTK_XML_Formats), using only one block at
the moment. I read the header with GHex and it seems OK. The critical
part of the code is (zlib_compress is a function I implemented to
compress the buffer). :
#ifdef HAVE_ZLIB
if (compression_level!=0){
unsigned int header[4];
header[0]=1;
header[1]=data_size;
header[2]=0;
header[3] = ((int)(data_size*1.002))+13;
unsigned char *compressed_sol = (unsigned char*)malloc (header[3]);
zlib_compress((unsigned
char*)buffer_sol.str().c_str(),compressed_sol,data_size,&header[3],compression_level);
fstream_sol.write((char *)header,4*sizeof(unsigned int));
fstream_sol.write((char*)compressed_sol,header[3]);
free(compressed_sol);
}else
#endif
{
fstream_sol.write((char *)(&data_size),sizeof(unsigned int));
fstream_sol.write(buffer_sol.str().c_str(),pos_end-pos_start);
}
Do you have any idea of what can be wrong?
Thanks for any help,
Sébastien
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