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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# copyright 2015 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.
import os
from .exceptions import ParseError
from .layers import PCBLayer, sort_layers
from .common import read as gerber_read
from .utils import listdir
class PCB(object):
@classmethod
def from_directory(cls, directory, board_name=None, verbose=False):
layers = []
names = set()
# Validate
directory = os.path.abspath(directory)
if not os.path.isdir(directory):
raise TypeError('{} is not a directory.'.format(directory))
# Load gerber files
for filename in listdir(directory, True, True):
try:
camfile = gerber_read(os.path.join(directory, filename))
layer = PCBLayer.from_cam(camfile)
layers.append(layer)
names.add(os.path.splitext(filename)[0])
if verbose:
print('[PCB]: Added {} layer <{}>'.format(layer.layer_class,
filename))
except ParseError:
if verbose:
print('[PCB]: Skipping file {}'.format(filename))
except IOError:
if verbose:
print('[PCB]: Skipping file {}'.format(filename))
# Try to guess board name
if board_name is None:
if len(names) == 1:
board_name = names.pop()
else:
board_name = os.path.basename(directory)
# Return PCB
return cls(layers, board_name)
def __init__(self, layers, name=None):
self.layers = sort_layers(layers)
self.name = name
def __len__(self):
return len(self.layers)
@property
def top_layers(self):
board_layers = [l for l in reversed(self.layers) if l.layer_class in
('topsilk', 'topmask', 'top')]
drill_layers = [l for l in self.drill_layers if 'top' in l.layers]
# Drill layer goes under soldermask for proper rendering of tented vias
return [board_layers[0]] + drill_layers + board_layers[1:]
@property
def bottom_layers(self):
board_layers = [l for l in self.layers if l.layer_class in
('bottomsilk', 'bottommask', 'bottom')]
drill_layers = [l for l in self.drill_layers if 'bottom' in l.layers]
# Drill layer goes under soldermask for proper rendering of tented vias
return [board_layers[0]] + drill_layers + board_layers[1:]
@property
def drill_layers(self):
return [l for l in self.layers if l.layer_class == 'drill']
@property
def copper_layers(self):
return list(reversed([layer for layer in self.layers if
layer.layer_class in
('top', 'bottom', 'internal')]))
@property
def outline_layer(self):
for layer in self.layers:
if layer.layer_class == 'outline':
return layer
@property
def layer_count(self):
""" Number of *COPPER* layers
"""
return len([l for l in self.layers if l.layer_class in
('top', 'bottom', 'internal')])
@property
def board_bounds(self):
for layer in self.layers:
if layer.layer_class == 'outline':
return layer.bounds
for layer in self.layers:
if layer.layer_class == 'top':
return layer.bounds
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