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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from dataclasses import dataclass
@dataclass
class FileSettings:
output_axes : str = 'AXBY' # For deprecated AS statement
image_polarity : str = 'positive'
image_rotation: int = 0
mirror_image : tuple = (False, False)
scale_factor : tuple = (1.0, 1.0) # For deprecated SF statement
notation : str = 'absolute'
units : str = 'inch'
angle_units : str = 'degrees'
zeros : bool = None
number_format : tuple = (2, 5)
# input validation
def __setattr__(self, name, value):
if name == 'output_axes' and value not in [None, 'AXBY', 'AYBX']:
raise ValueError('output_axes must be either "AXBY", "AYBX" or None')
if name == 'image_rotation' and value not in [0, 90, 180, 270]:
raise ValueError('image_rotation must be 0, 90, 180 or 270')
elif name == 'image_polarity' and value not in ['positive', 'negative']:
raise ValueError('image_polarity must be either "positive" or "negative"')
elif name == 'mirror_image' and len(value) != 2:
raise ValueError('mirror_image must be 2-tuple of bools: (mirror_a, mirror_b)')
elif name == 'scale_factor' and len(value) != 2:
raise ValueError('scale_factor must be 2-tuple of floats: (scale_a, scale_b)')
elif name == 'notation' and value not in ['inch', 'mm']:
raise ValueError('Units must be either "inch" or "mm"')
elif name == 'units' and value not in ['absolute', 'incremental']:
raise ValueError('Notation must be either "absolute" or "incremental"')
elif name == 'angle_units' and value not in ('degrees', 'radians'):
raise ValueError('Angle units may be "degrees" or "radians"')
elif name == 'zeros' and value not in [None, 'leading', 'trailing']:
raise ValueError('zero_suppression must be either "leading" or "trailing" or None')
elif name == 'number_format' and len(value) != 2:
raise ValueError('Number format must be a (integer, fractional) tuple of integers')
super().__setattr__(name, value)
def __str__(self):
return f'<File settings: units={self.units}/{self.angle_units} notation={self.notation} zeros={self.zeros} number_format={self.number_format}>'
class CamFile(object):
""" Base class for Gerber/Excellon files.
Provides a common set of settings parameters.
Parameters
----------
settings : FileSettings
The current file configuration.
primitives : iterable
List of primitives in the file.
filename : string
Name of the file that this CamFile represents.
layer_name : string
Name of the PCB layer that the file represents
Attributes
----------
settings : FileSettings
File settings as a FileSettings object
notation : string
File notation setting. May be either 'absolute' or 'incremental'
units : string
File units setting. May be 'inch' or 'mm'
zero_suppression : string
File zero-suppression setting. May be either 'leading' or 'trailling'
format : tuple (<int>, <int>)
File decimal representation format as a tuple of (integer digits,
decimal digits)
"""
def __init__(self, statements=None, settings=None, primitives=None,
filename=None, layer_name=None):
if settings is not None:
self.notation = settings['notation']
self.units = settings['units']
self.zero_suppression = settings['zero_suppression']
self.zeros = settings['zeros']
self.format = settings['format']
else:
self.notation = 'absolute'
self.units = 'inch'
self.zero_suppression = 'trailing'
self.zeros = 'leading'
self.format = (2, 5)
self.statements = statements if statements is not None else []
if primitives is not None:
self.primitives = primitives
self.filename = filename
self.layer_name = layer_name
@property
def settings(self):
""" File settings
Returns
-------
settings : FileSettings (dict-like)
A FileSettings object with the specified configuration.
"""
return FileSettings(self.notation, self.units, self.zero_suppression,
self.format)
@property
def bounds(self):
""" File boundaries
"""
pass
@property
def bounding_box(self):
pass
def to_inch(self):
pass
def to_metric(self):
pass
def render(self, ctx=None, invert=False, filename=None):
""" Generate image of layer.
Parameters
----------
ctx : :class:`GerberContext`
GerberContext subclass used for rendering the image
filename : string <optional>
If provided, save the rendered image to `filename`
"""
if ctx is None:
from .render import GerberCairoContext
ctx = GerberCairoContext()
ctx.set_bounds(self.bounding_box)
ctx.paint_background()
ctx.invert = invert
ctx.new_render_layer()
for p in self.primitives:
ctx.render(p)
ctx.flatten()
if filename is not None:
ctx.dump(filename)
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