Source code for

#  Copyright (c) 2023 Mira Geoscience Ltd.
#  This file is part of geoh5py.
#  geoh5py is free software: you can redistribute it and/or modify
#  it under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#  geoh5py is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  GNU Lesser General Public License for more details.
#  You should have received a copy of the GNU Lesser General Public License
#  along with geoh5py.  If not, see <>.
from __future__ import annotations

from typing import TYPE_CHECKING

import numpy as np

from geoh5py.shared.exceptions import ShapeValidationError

    from .data_type import DataType

[docs]class ColorMap: """Records colors assigned to value ranges (where Value is the start of the range).""" _attribute_map = {"File name": "name"} _names = ["Value", "Red", "Green", "Blue", "Alpha"] _formats = ["<f8", "u1", "u1", "u1", "u1"] def __init__(self, **kwargs): self._values = np.empty((0, 5)) self._name = "geoh5py_custom.TBL" self._parent = None for attr, item in kwargs.items(): try: if attr in self._attribute_map: attr = self._attribute_map[attr] setattr(self, attr, item) except AttributeError: continue @property def values(self) -> np.ndarray | None: """ :obj:`numpy.array`: Colormap defined by values and corresponding RGBA: .. code-block:: python values = [ [V_1, R_1, G_1, B_1, A_1], ..., [V_i, R_i, G_i, B_i, A_i] ] where V (Values) are sorted floats defining the position of each RGBA. R (Red), G (Green), B (Blue) and A (Alpha) are integer values between [0, 255]. """ if self._values is None: return self._values return np.vstack([self._values[name] for name in self._names]) @values.setter def values(self, values: np.ndarray): if not isinstance(values, np.ndarray): raise TypeError(f"Input 'values' of ColorMap must be of type {np.ndarray}.") if np.issubdtype(values.dtype.base, np.number): if values.shape[1] != 5: raise ShapeValidationError("values", values.shape, "(*, 5)") self._values = np.core.records.fromarrays( values.T, names=self._names, formats=self._formats ) else: if values.dtype.names is None or not all( name in self._names for name in values.dtype.names ): raise ValueError( f"Input 'values' must contain fields with types {self._names}" ) self._values = np.asarray( values, dtype=list(zip(self._names, self._formats)) ) self.parent.modified_attributes = "color_map" if self.parent is not None: getattr(self.parent, "workspace").update_attribute(self, "color_map") @property def name(self) -> str: """ :obj:`str`: Name of the colormap """ return self._name @name.setter def name(self, value: str): self._name = value self.parent.modified_attributes = "color_map" @property def parent(self): """Parent data type""" return self._parent @parent.setter def parent(self, data_type: DataType): self._parent = data_type def __len__(self): return len(self._values)