kopia lustrzana https://gitlab.com/gerbolyze/gerbonara
262 wiersze
8.3 KiB
Python
262 wiersze
8.3 KiB
Python
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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CAM File
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============
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**AM file classes**
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This module provides common base classes for Excellon/Gerber CNC files
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"""
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class FileSettings(object):
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""" CAM File Settings
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Provides a common representation of gerber/excellon file settings
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Parameters
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----------
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notation: string
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notation format. either 'absolute' or 'incremental'
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units : string
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Measurement units. 'inch' or 'metric'
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zero_suppression: string
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'leading' to suppress leading zeros, 'trailing' to suppress trailing zeros.
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This is the convention used in Gerber files.
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format : tuple (int, int)
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Decimal format
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zeros : string
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'leading' to include leading zeros, 'trailing to include trailing zeros.
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This is the convention used in Excellon files
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Notes
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-----
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Either `zeros` or `zero_suppression` should be specified, there is no need to
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specify both. `zero_suppression` will take on the opposite value of `zeros`
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and vice versa
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"""
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def __init__(self, notation='absolute', units='inch',
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zero_suppression=None, format=(2, 5), zeros=None,
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angle_units='degrees'):
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if notation not in ['absolute', 'incremental']:
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raise ValueError('Notation must be either absolute or incremental')
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self.notation = notation
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if units not in ['inch', 'metric']:
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raise ValueError('Units must be either inch or metric')
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self.units = units
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if zero_suppression is None and zeros is None:
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self.zero_suppression = 'trailing'
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elif zero_suppression == zeros:
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raise ValueError('Zeros and Zero Suppression must be different. \
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Best practice is to specify only one.')
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elif zero_suppression is not None:
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if zero_suppression not in ['leading', 'trailing']:
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raise ValueError('Zero suppression must be either leading or \
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trailling')
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self.zero_suppression = zero_suppression
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elif zeros is not None:
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if zeros not in ['leading', 'trailing']:
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raise ValueError('Zeros must be either leading or trailling')
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self.zeros = zeros
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if len(format) != 2:
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raise ValueError('Format must be a tuple(n=2) of integers')
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self.format = format
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if angle_units not in ('degrees', 'radians'):
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raise ValueError('Angle units may be degrees or radians')
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self.angle_units = angle_units
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@property
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def zero_suppression(self):
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return self._zero_suppression
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@zero_suppression.setter
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def zero_suppression(self, value):
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self._zero_suppression = value
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self._zeros = 'leading' if value == 'trailing' else 'trailing'
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@property
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def zeros(self):
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return self._zeros
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@zeros.setter
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def zeros(self, value):
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self._zeros = value
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self._zero_suppression = 'leading' if value == 'trailing' else 'trailing'
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def __getitem__(self, key):
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if key == 'notation':
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return self.notation
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elif key == 'units':
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return self.units
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elif key == 'zero_suppression':
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return self.zero_suppression
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elif key == 'zeros':
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return self.zeros
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elif key == 'format':
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return self.format
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elif key == 'angle_units':
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return self.angle_units
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else:
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raise KeyError()
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def __setitem__(self, key, value):
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if key == 'notation':
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if value not in ['absolute', 'incremental']:
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raise ValueError('Notation must be either \
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absolute or incremental')
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self.notation = value
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elif key == 'units':
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if value not in ['inch', 'metric']:
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raise ValueError('Units must be either inch or metric')
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self.units = value
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elif key == 'zero_suppression':
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if value not in ['leading', 'trailing']:
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raise ValueError('Zero suppression must be either leading or \
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trailling')
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self.zero_suppression = value
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elif key == 'zeros':
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if value not in ['leading', 'trailing']:
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raise ValueError('Zeros must be either leading or trailling')
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self.zeros = value
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elif key == 'format':
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if len(value) != 2:
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raise ValueError('Format must be a tuple(n=2) of integers')
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self.format = value
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elif key == 'angle_units':
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if value not in ('degrees', 'radians'):
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raise ValueError('Angle units may be degrees or radians')
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self.angle_units = value
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else:
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raise KeyError('%s is not a valid key' % key)
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def __eq__(self, other):
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return (self.notation == other.notation and
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self.units == other.units and
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self.zero_suppression == other.zero_suppression and
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self.format == other.format and
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self.angle_units == other.angle_units)
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class CamFile(object):
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""" Base class for Gerber/Excellon files.
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Provides a common set of settings parameters.
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Parameters
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----------
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settings : FileSettings
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The current file configuration.
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primitives : iterable
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List of primitives in the file.
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filename : string
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Name of the file that this CamFile represents.
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layer_name : string
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Name of the PCB layer that the file represents
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Attributes
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----------
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settings : FileSettings
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File settings as a FileSettings object
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notation : string
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File notation setting. May be either 'absolute' or 'incremental'
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units : string
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File units setting. May be 'inch' or 'metric'
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zero_suppression : string
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File zero-suppression setting. May be either 'leading' or 'trailling'
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format : tuple (<int>, <int>)
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File decimal representation format as a tuple of (integer digits,
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decimal digits)
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"""
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def __init__(self, statements=None, settings=None, primitives=None,
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filename=None, layer_name=None):
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if settings is not None:
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self.notation = settings['notation']
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self.units = settings['units']
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self.zero_suppression = settings['zero_suppression']
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self.zeros = settings['zeros']
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self.format = settings['format']
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else:
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self.notation = 'absolute'
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self.units = 'inch'
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self.zero_suppression = 'trailing'
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self.zeros = 'leading'
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self.format = (2, 5)
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self.statements = statements if statements is not None else []
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self.primitives = primitives
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self.filename = filename
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self.layer_name = layer_name
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@property
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def settings(self):
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""" File settings
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Returns
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-------
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settings : FileSettings (dict-like)
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A FileSettings object with the specified configuration.
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"""
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return FileSettings(self.notation, self.units, self.zero_suppression,
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self.format)
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@property
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def bounds(self):
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""" File boundaries
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"""
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pass
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def render(self, ctx, filename=None):
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""" Generate image of layer.
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Parameters
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----------
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ctx : :class:`GerberContext`
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GerberContext subclass used for rendering the image
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filename : string <optional>
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If provided, save the rendered image to `filename`
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"""
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bounds = [tuple([x * 1.2, y*1.2]) for x, y in self.bounds]
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ctx.set_bounds(bounds)
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for p in self.primitives:
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ctx.render(p)
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if filename is not None:
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ctx.dump(filename)
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