API Reference

Auto-generated from Fortran source doc comments using FORMAL.

src/lib

• vtk_fortran — main module; re-exports vtk_file, pvtk_file, vtm_file, write_xml_volatile
• vtk_fortran_vtk_file — vtk_file derived type (serial writer)
• vtk_fortran_pvtk_file — pvtk_file derived type (parallel/partitioned writer)
• vtk_fortran_vtm_file — vtm_file derived type (multi-block composite writer)
• vtk_fortran_vtk_file_xml_writer_abstract — abstract base class defining the common writer interface
• vtk_fortran_vtk_file_xml_writer_ascii_local — ASCII writer
• vtk_fortran_vtk_file_xml_writer_binary_local — Base64-encoded binary writer
• vtk_fortran_vtk_file_xml_writer_appended — raw binary appended writer
• vtk_fortran_dataarray_encoder — encoding routines for ASCII and Base64 data arrays
• vtk_fortran_parameters — shared constants

Key type-bound procedures

vtk_file / pvtk_file

Procedure	Description
%initialize(format, filename, mesh_topology, ...)	Open the file, select the writer, write the XML header
%finalize()	Flush and close the file
%xml_writer%write_fielddata(...)	Write global FieldData (time, cycle, etc.)
%xml_writer%write_piece(...)	Open or close a Piece element
%xml_writer%write_geo(...)	Write geometry (coordinates)
%xml_writer%write_connectivity(...)	Write unstructured connectivity, offsets, and cell types
%xml_writer%write_dataarray(...)	Write a data array (overloaded for all kinds and ranks)
%xml_writer%write_parallel_geo(...)	Write a <P*> geometry piece reference (pvtk_file only)
%xml_writer%write_parallel_dataarray(...)	Write a parallel data array descriptor (pvtk_file only)

vtm_file

Procedure	Description
%initialize(filename)	Create the .vtm wrapper file
%write_block(filenames, names, name)	Add a named block referencing one or more partition files
%finalize()	Close the .vtm file

write_xml_volatile

A module-level function (not a type-bound procedure) that returns the full XML output as an allocatable character string instead of writing to disk. Useful for parallel I/O workflows where the calling code controls file access.