hdf5 support

backend/importers/gwy.py

@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+import numpy as np
+
+from backend.data_types import DataField
+
+
+extensions = frozenset({".gwy"})
+calibrated = True
+
+
+def load(path: Path) -> list[DataField]:
+    import gwyfile
+    obj = gwyfile.load(str(path))
+    channels = gwyfile.util.get_datafields(obj)
+    if not channels:
+        raise ValueError(f"No data channels found in {path.name}")
+
+    fields = []
+    for ch in channels.values():
+        data = np.array(ch.data, dtype=np.float64).reshape(ch.yres, ch.xres)
+        fields.append(DataField(
+            data=data,
+            xreal=float(ch.xreal),
+            yreal=float(ch.yreal),
+            xoff=float(getattr(ch, "xoff", 0.0)),
+            yoff=float(getattr(ch, "yoff", 0.0)),
+            si_unit_xy="m",
+            si_unit_z="m",
+        ))
+    return fields
+
+
+def channel_names(path: Path) -> list[str]:
+    import gwyfile
+    try:
+        obj = gwyfile.load(str(path))
+        channels = gwyfile.util.get_datafields(obj)
+        if channels:
+            return list(channels.keys())
+    except Exception:
+        pass
+    return []