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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, layer_signatures
+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)
+ name = os.path.splitext(filename)[0]
+ if len(os.path.splitext(filename)) > 1:
+ _name, ext = os.path.splitext(name)
+ if ext[1:] in layer_signatures(layer.layer_class):
+ name = _name
+ if layer.layer_class == 'drill' and 'drill' in ext:
+ name = _name
+ names.add(name)
+ 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