v1.21.1

• BUG: Fixed read_topography not working with gzip streams (gzip.GzipFile objects have integer mode attribute, not string)

v1.21.0

• ENH: Added reader for Digital Surf Mountains MNT files
• ENH: Added readers for NMS, OS3D, SDF, TMF, and ZMG file formats
• ENH: Added OLE and Zlib helper classes for declarative binary file parsing
• ENH: MNT reader now extracts Z unit from file metadata instead of hardcoding
• BUG: Fixed treatment of masked values in MNT reader (data type tag now correctly determines masking behavior)
• MAINT: Converted FRT reader to declarative style
• MAINT: Use 1D capabilities of muGrid 0.105.x

v1.20.0

• API: Added MagicMatch enum and can_read() classmethod to reader infrastructure for magic-based format detection
• API: Added scan_line_align() pipeline function for line-by-line polynomial correction of AFM scan data (supports variable polynomial degree for scanner bow correction)
• API: Added DataKind enum and stable channel_id identifier for file reader channelsNo
• API: Added channel_id and height_channel_index parameters to topography() method for stable channel selection
• API: Added height_channels property to readers for backwards-compatible access to height data channels only
• API: Added height_index_to_channel_id() and channel_id_to_height_index() utility methods for database migration
• API: ChannelInfo now has data_kind, data_unit, lateral_unit, is_height_channel, channel_id, and height_index properties
• API: Added X3P writer (topography.to_x3p()) for ISO 5436-2 / ISO 25178-72 format
• API: Added Gwyddion writer (topography.to_gwy()) for GWY format
• ENH: File format detection now uses magic bytes for fast pre-filtering before attempting full parsing
• DOC: Added SUPPORTED_FORMATS.md documenting all 35+ supported file formats
• BUG: SurfaceContainer autocorrelation, power_spectrum, and variable_bandwidth methods now have proper docstrings
• BUG: Fixed open_topography passing communicator to readers that don't support it
• BUILD: Added PyPI keywords for instrument manufacturers and file formats (improves package discoverability)
• BUILD: Removed support for Python 3.9; minimum Python version is now 3.10
• BUILD: Added support for Python 3.14
• BUILD: Minimum muGrid version is now 0.103.0
• MAINT: Updated from muFFT to muGrid dependency (muFFT has been merged into muGrid)
• MAINT: Added numpy-based FFT engine for 1D topographies (muGrid only supports 2D/3D)
• MAINT: Pipeline functions now preserve docstrings and source code for IPython introspection

v1.19.1

• MAINT: Adjusted thresholds for mask data in OPD files to what Gwyddion uses
• BUG: Fixed reading of JPK files with thumbnails

v1.19.0

• ENH: Support for ZStandard compressed ZON files
• ENH: plot pipeline function for line scans
• BUG: Reading ZIP file with multiple containers

v1.18.3

• BUILD: Removed support for Python 3.8; require numpy>=2.0.0
• ENH: Encoding masked arrays

v1.18.2

• MAINT: Pass generic keyword arguments from container scale-dependent statistical properties function to the underlying functions for topographies

v1.18.1

• BUG: Fixed regression in reading single-column text files in new-style reader

v1.18.0

• ENH: Reading Wyko text files (#399)
• MAINT: Text reader is now a new style, class-based reader
• MAINT: Bumped muFFT dependency to 0.93.0; updated code to reflect API changes

v1.17.1

• BUG: Mangling Angstrom unit to ascii
• BUG: Missing Meson build files for CLI