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Merge pull request #53 from curtacircuitos/pcb_interface

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Add PCB interface
This commit is contained in:
Paulo Henrique Silva 2016-01-05 22:05:19 -02:00
commit 7a53251463
20 changed files with 2435 additions and 500 deletions
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1
Makefile
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@ -31,4 +31,5 @@ doc-clean:
.PHONY: examples
examples:
PYTHONPATH=. $(PYTHON) examples/cairo_example.py
PYTHONPATH=. $(PYTHON) examples/pcb_example.py

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examples/cairo_example.py
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@ -36,7 +36,6 @@ mask = read(os.path.join(GERBER_FOLDER, 'soldermask.GTS'))
silk = read(os.path.join(GERBER_FOLDER, 'silkscreen.GTO'))
drill = read(os.path.join(GERBER_FOLDER, 'ncdrill.DRD'))
# Create a new drawing context
ctx = GerberCairoContext()

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examples/pcb_example.py Normal file
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@ -0,0 +1,39 @@
#! /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.
"""
This example demonstrates the use of pcb-tools with cairo to render composite
images using the PCB interface
"""
import os
from gerber import PCB
from gerber.render import GerberCairoContext, theme
GERBER_FOLDER = os.path.abspath(os.path.join(os.path.dirname(__file__), 'gerbers'))
# Create a new drawing context
ctx = GerberCairoContext()
# Create a new PCB
pcb = PCB.from_directory(GERBER_FOLDER)
pcb.theme = theme.THEMES['OSH Park']
ctx.render_layers(pcb.top_layers, os.path.join(os.path.dirname(__file__), 'pcb_top.png'))
ctx.render_layers(pcb.bottom_layers, os.path.join(os.path.dirname(__file__), 'pcb_bottom.png'))

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3
gerber/__init__.py
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@ -23,4 +23,5 @@ gerber-tools provides utilities for working with Gerber (RS-274X) and Excellon
files in python.
"""
from .common import read, loads
from .common import read, loads
from .pcb import PCB

3
gerber/common.py
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@ -17,6 +17,7 @@
from . import rs274x
from . import excellon
from . import ipc356
from .exceptions import ParseError
from .utils import detect_file_format
@ -43,6 +44,8 @@ def read(filename):
return rs274x.read(filename)
elif fmt == 'excellon':
return excellon.read(filename)
elif fmt == 'ipc_d_356':
return ipc356.read(filename)
else:
raise ParseError('Unable to detect file format')

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gerber/exceptions.py
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@ -15,6 +15,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
class ParseError(Exception):
pass

89
gerber/ipc356.py
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@ -27,8 +27,11 @@ _NNAME = re.compile(r'^NNAME\d+$')
# Board Edge Coordinates
_COORD = re.compile(r'X?(?P<x>[\d\s]*)?Y?(?P<y>[\d\s]*)?')
_SM_FIELD = {'0': 'none', '1': 'primary side', '2': 'secondary side', '3': 'both'}
_SM_FIELD = {
'0': 'none',
'1': 'primary side',
'2': 'secondary side',
'3': 'both'}
def read(filename):
@ -51,17 +54,17 @@ def read(filename):
class IPC_D_356(CamFile):
@classmethod
def from_file(self, filename):
p = IPC_D_356_Parser()
return p.parse(filename)
def from_file(cls, filename):
parser = IPC_D_356_Parser()
return parser.parse(filename)
def __init__(self, statements, settings, primitives=None):
def __init__(self, statements, settings, primitives=None, filename=None):
self.statements = statements
self.units = settings.units
self.angle_units = settings.angle_units
self.primitives = [TestRecord((rec.x_coord, rec.y_coord), rec.net_name,
rec.access) for rec in self.test_records]
self.filename = filename
@property
def settings(self):
@ -95,8 +98,6 @@ class IPC_D_356(CamFile):
adjacent_nets.add(record.net)
nets.append(IPC356_Net(net, adjacent_nets))
return nets
@property
def components(self):
@ -109,14 +110,12 @@ class IPC_D_356(CamFile):
@property
def outlines(self):
return [stmt for stmt in self.statements
return [stmt for stmt in self.statements
if isinstance(stmt, IPC356_Outline)]
@property
def adjacency_records(self):
return [record for record in self.statements
return [record for record in self.statements
if isinstance(record, IPC356_Adjacency)]
def render(self, ctx, layer='both', filename=None):
@ -133,6 +132,7 @@ class IPC_D_356(CamFile):
class IPC_D_356_Parser(object):
# TODO: Allow multi-line statements (e.g. Altium board edge)
def __init__(self):
self.units = 'inch'
self.angle_units = 'degrees'
@ -158,8 +158,7 @@ class IPC_D_356_Parser(object):
oldline = line
self._parse_line(oldline)
return IPC_D_356(self.statements, self.settings)
return IPC_D_356(self.statements, self.settings, filename=filename)
def _parse_line(self, line):
if not len(line):
@ -201,18 +200,23 @@ class IPC_D_356_Parser(object):
elif line[0:3] == '378':
# Conductor
self.statements.append(IPC356_Conductor.from_line(line, self.settings))
self.statements.append(
IPC356_Conductor.from_line(
line, self.settings))
elif line[0:3] == '379':
# Net Adjacency
self.statements.append(IPC356_Adjacency.from_line(line))
elif line[0:3] == '389':
# Outline
self.statements.append(IPC356_Outline.from_line(line, self.settings))
self.statements.append(
IPC356_Outline.from_line(
line, self.settings))
class IPC356_Comment(object):
@classmethod
def from_line(cls, line):
if line[0] != 'C':
@ -228,6 +232,7 @@ class IPC356_Comment(object):
class IPC356_Parameter(object):
@classmethod
def from_line(cls, line):
if line[0] != 'P':
@ -246,13 +251,14 @@ class IPC356_Parameter(object):
class IPC356_TestRecord(object):
@classmethod
def from_line(cls, line, settings):
offset = 0
units = settings.units
angle = settings.angle_units
feature_types = {'1':'through-hole', '2': 'smt',
'3':'tooling-feature', '4':'tooling-hole'}
feature_types = {'1': 'through-hole', '2': 'smt',
'3': 'tooling-feature', '4': 'tooling-hole'}
access = ['both', 'top', 'layer2', 'layer3', 'layer4', 'layer5',
'layer6', 'layer7', 'bottom']
record = {}
@ -290,21 +296,21 @@ class IPC356_TestRecord(object):
if len(line) >= (43 + offset):
end = len(line) - 1 if len(line) < (50 + offset) else (49 + offset)
coord = int(line[42 + offset:end].strip())
record['x_coord'] = (coord * 0.0001 if units == 'inch'
record['x_coord'] = (coord * 0.0001 if units == 'inch'
else coord * 0.001)
if len(line) >= (51 + offset):
end = len(line) - 1 if len(line) < (58 + offset) else (57 + offset)
coord = int(line[50 + offset:end].strip())
record['y_coord'] = (coord * 0.0001 if units == 'inch'
else coord * 0.001)
record['y_coord'] = (coord * 0.0001 if units == 'inch'
else coord * 0.001)
if len(line) >= (59 + offset):
end = len(line) - 1 if len(line) < (63 + offset) else (62 + offset)
dim = line[58 + offset:end].strip()
if dim != '':
record['rect_x'] = (int(dim) * 0.0001 if units == 'inch'
else int(dim) * 0.001)
else int(dim) * 0.001)
if len(line) >= (64 + offset):
end = len(line) - 1 if len(line) < (68 + offset) else (67 + offset)
@ -321,7 +327,7 @@ class IPC356_TestRecord(object):
else math.degrees(rot))
if len(line) >= (74 + offset):
end = 74 + offset
end = 74 + offset
sm_info = line[73 + offset:end].strip()
record['soldermask_info'] = _SM_FIELD.get(sm_info)
@ -337,7 +343,8 @@ class IPC356_TestRecord(object):
def __repr__(self):
return '<IPC-D-356 %s Test Record: %s>' % (self.net_name,
self.feature_type)
self.feature_type)
class IPC356_Outline(object):
@ -365,24 +372,27 @@ class IPC356_Outline(object):
class IPC356_Conductor(object):
@classmethod
def from_line(cls, line, settings):
if line[0:3] != '378':
raise ValueError('Not a valid IPC-D-356 Conductor statement')
scale = 0.0001 if settings.units == 'inch' else 0.001
net_name = line[3:17].strip()
layer = int(line[19:21])
# Parse out aperture definiting
raw_aperture = line[22:].split()[0]
aperture_dict = _COORD.match(raw_aperture).groupdict()
x = 0
y = 0
x = int(aperture_dict['x']) * scale if aperture_dict['x'] is not '' else None
y = int(aperture_dict['y']) * scale if aperture_dict['y'] is not '' else None
x = int(aperture_dict['x']) * \
scale if aperture_dict['x'] is not '' else None
y = int(aperture_dict['y']) * \
scale if aperture_dict['y'] is not '' else None
aperture = (x, y)
# Parse out conductor shapes
shapes = []
coord_list = ' '.join(line[22:].split()[1:])
@ -399,7 +409,7 @@ class IPC356_Conductor(object):
shape.append((x * scale, y * scale))
shapes.append(tuple(shape))
return cls(net_name, layer, aperture, tuple(shapes))
def __init__(self, net_name, layer, aperture, shapes):
self.net_name = net_name
self.layer = layer
@ -417,18 +427,19 @@ class IPC356_Adjacency(object):
if line[0:3] != '379':
raise ValueError('Not a valid IPC-D-356 Conductor statement')
nets = line[3:].strip().split()
return cls(nets[0], nets[1:])
def __init__(self, net, adjacent_nets):
self.net = net
self.adjacent_nets = adjacent_nets
def __repr__(self):
return '<IPC-D-356 %s Adjacency Record>' % self.net
class IPC356_EndOfFile(object):
def __init__(self):
pass
@ -437,12 +448,14 @@ class IPC356_EndOfFile(object):
def __repr__(self):
return '<IPC-D-356 EOF>'
class IPC356_Net(object):
def __init__(self, name, adjacent_nets):
self.name = name
self.adjacent_nets = set(adjacent_nets) if adjacent_nets is not None else set()
self.adjacent_nets = set(
adjacent_nets) if adjacent_nets is not None else set()
def __repr__(self):
return '<IPC-D-356 Net %s>' % self.name

240
gerber/layers.py
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@ -15,40 +15,212 @@
# See the License for the specific language governing permissions and
# limitations under the License.
top_copper_ext = ['gtl', 'cmp', 'top', ]
top_copper_name = ['art01', 'top', 'GTL', 'layer1', 'soldcom', 'comp', ]
import os
import re
from collections import namedtuple
bottom_copper_ext = ['gbl', 'sld', 'bot', 'sol', ]
bottom_coppper_name = ['art02', 'bottom', 'bot', 'GBL', 'layer2', 'soldsold', ]
internal_layer_ext = ['in', 'gt1', 'gt2', 'gt3', 'gt4', 'gt5', 'gt6', 'g1',
'g2', 'g3', 'g4', 'g5', 'g6', ]
internal_layer_name = ['art', 'internal']
power_plane_name = ['pgp', 'pwr', ]
ground_plane_name = ['gp1', 'gp2', 'gp3', 'gp4', 'gt5', 'gp6', 'gnd',
'ground', ]
top_silk_ext = ['gto', 'sst', 'plc', 'ts', 'skt', ]
top_silk_name = ['sst01', 'topsilk', 'silk', 'slk', 'sst', ]
bottom_silk_ext = ['gbo', 'ssb', 'pls', 'bs', 'skb', ]
bottom_silk_name = ['sst', 'bsilk', 'ssb', 'botsilk', ]
top_mask_ext = ['gts', 'stc', 'tmk', 'smt', 'tr', ]
top_mask_name = ['sm01', 'cmask', 'tmask', 'mask1', 'maskcom', 'topmask',
'mst', ]
bottom_mask_ext = ['gbs', 'sts', 'bmk', 'smb', 'br', ]
bottom_mask_name = ['sm', 'bmask', 'mask2', 'masksold', 'botmask', 'msb', ]
top_paste_ext = ['gtp', 'tm']
top_paste_name = ['sp01', 'toppaste', 'pst']
bottom_paste_ext = ['gbp', 'bm']
bottom_paste_name = ['sp02', 'botpaste', 'psb']
board_outline_ext = ['gko']
board_outline_name = ['BDR', 'border', 'out', ]
from .excellon import ExcellonFile
from .ipc356 import IPC_D_356
Hint = namedtuple('Hint', 'layer ext name')
hints = [
Hint(layer='top',
ext=['gtl', 'cmp', 'top', ],
name=['art01', 'top', 'GTL', 'layer1', 'soldcom', 'comp', ]
),
Hint(layer='bottom',
ext=['gbl', 'sld', 'bot', 'sol', 'bottom', ],
name=['art02', 'bottom', 'bot', 'GBL', 'layer2', 'soldsold', ]
),
Hint(layer='internal',
ext=['in', 'gt1', 'gt2', 'gt3', 'gt4', 'gt5', 'gt6', 'g1',
'g2', 'g3', 'g4', 'g5', 'g6', ],
name=['art', 'internal', 'pgp', 'pwr', 'gp1', 'gp2', 'gp3', 'gp4',
'gt5', 'gp6', 'gnd', 'ground', ]
),
Hint(layer='topsilk',
ext=['gto', 'sst', 'plc', 'ts', 'skt', 'topsilk', ],
name=['sst01', 'topsilk', 'silk', 'slk', 'sst', ]
),
Hint(layer='bottomsilk',
ext=['gbo', 'ssb', 'pls', 'bs', 'skb', 'bottomsilk', ],
name=['bsilk', 'ssb', 'botsilk', ]
),
Hint(layer='topmask',
ext=['gts', 'stc', 'tmk', 'smt', 'tr', 'topmask', ],
name=['sm01', 'cmask', 'tmask', 'mask1', 'maskcom', 'topmask',
'mst', ]
),
Hint(layer='bottommask',
ext=['gbs', 'sts', 'bmk', 'smb', 'br', 'bottommask', ],
name=['sm', 'bmask', 'mask2', 'masksold', 'botmask', 'msb', ]
),
Hint(layer='toppaste',
ext=['gtp', 'tm', 'toppaste', ],
name=['sp01', 'toppaste', 'pst']
),
Hint(layer='bottompaste',
ext=['gbp', 'bm', 'bottompaste', ],
name=['sp02', 'botpaste', 'psb']
),
Hint(layer='outline',
ext=['gko', 'outline', ],
name=['BDR', 'border', 'out', ]
),
Hint(layer='ipc_netlist',
ext=['ipc'],
name=[],
),
]
def guess_layer_class(filename):
try:
directory, name = os.path.split(filename)
name, ext = os.path.splitext(name.lower())
for hint in hints:
patterns = [r'^(\w*[.-])*{}([.-]\w*)?$'.format(x) for x in hint.name]
if ext[1:] in hint.ext or any(re.findall(p, name, re.IGNORECASE) for p in patterns):
return hint.layer
except:
pass
return 'unknown'
def sort_layers(layers):
layer_order = ['outline', 'toppaste', 'topsilk', 'topmask', 'top',
'internal', 'bottom', 'bottommask', 'bottomsilk',
'bottompaste', 'drill', ]
output = []
drill_layers = [layer for layer in layers if layer.layer_class == 'drill']
internal_layers = list(sorted([layer for layer in layers if layer.layer_class == 'internal']))
for layer_class in layer_order:
if layer_class == 'internal':
output += internal_layers
elif layer_class == 'drill':
output += drill_layers
else:
for layer in layers:
if layer.layer_class == layer_class:
output.append(layer)
return output
class PCBLayer(object):
""" Base class for PCB Layers
Parameters
----------
source : CAMFile
CAMFile representing the layer
Attributes
----------
filename : string
Source Filename
"""
@classmethod
def from_gerber(cls, camfile):
filename = camfile.filename
layer_class = guess_layer_class(filename)
if isinstance(camfile, ExcellonFile) or (layer_class == 'drill'):
return DrillLayer.from_gerber(camfile)
elif layer_class == 'internal':
return InternalLayer.from_gerber(camfile)
if isinstance(camfile, IPC_D_356):
layer_class = 'ipc_netlist'
return cls(filename, layer_class, camfile)
def __init__(self, filename=None, layer_class=None, cam_source=None, **kwargs):
super(PCBLayer, self).__init__(**kwargs)
self.filename = filename
self.layer_class = layer_class
self.cam_source = cam_source
self.surface = None
self.primitives = cam_source.primitives if cam_source is not None else []
@property
def bounds(self):
if self.cam_source is not None:
return self.cam_source.bounds
else:
return None
class DrillLayer(PCBLayer):
@classmethod
def from_gerber(cls, camfile):
return cls(camfile.filename, camfile)
def __init__(self, filename=None, cam_source=None, layers=None, **kwargs):
super(DrillLayer, self).__init__(filename, 'drill', cam_source, **kwargs)
self.layers = layers if layers is not None else ['top', 'bottom']
class InternalLayer(PCBLayer):
@classmethod
def from_gerber(cls, camfile):
filename = camfile.filename
try:
order = int(re.search(r'\d+', filename).group())
except:
order = 0
return cls(filename, camfile, order)
def __init__(self, filename=None, cam_source=None, order=0, **kwargs):
super(InternalLayer, self).__init__(filename, 'internal', cam_source, **kwargs)
self.order = order
def __eq__(self, other):
if not hasattr(other, 'order'):
raise TypeError()
return (self.order == other.order)
def __ne__(self, other):
if not hasattr(other, 'order'):
raise TypeError()
return (self.order != other.order)
def __gt__(self, other):
if not hasattr(other, 'order'):
raise TypeError()
return (self.order > other.order)
def __lt__(self, other):
if not hasattr(other, 'order'):
raise TypeError()
return (self.order < other.order)
def __ge__(self, other):
if not hasattr(other, 'order'):
raise TypeError()
return (self.order >= other.order)
def __le__(self, other):
if not hasattr(other, 'order'):
raise TypeError()
return (self.order <= other.order)
class LayerSet(object):
def __init__(self, name, layers, **kwargs):
super(LayerSet, self).__init__(**kwargs)
self.name = name
self.layers = list(layers)
def __len__(self):
return len(self.layers)
def __getitem__(self, item):
return self.layers[item]
def to_render(self):
return self.layers
def apply_theme(self, theme):
pass

94
gerber/pcb.py Normal file
View file

@ -0,0 +1,94 @@
#! /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, LayerSet, 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_gerber(camfile)
layers.append(layer)
names.add(os.path.splitext(filename)[0])
if verbose:
print('Added {} layer <{}>'.format(layer.layer_class, filename))
except ParseError:
if verbose:
print('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]
return board_layers + drill_layers
@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]
return board_layers + drill_layers
@property
def drill_layers(self):
return [l for l in self.layers if l.layer_class == 'drill']
@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

124
gerber/render/cairo_backend.py
View file

@ -21,7 +21,8 @@ from operator import mul
import math
import tempfile
from .render import GerberContext
from .render import GerberContext, RenderSettings
from .theme import THEMES
from ..primitives import *
try:
@ -39,16 +40,25 @@ class GerberCairoContext(GerberContext):
self.bg = False
self.mask = None
self.mask_ctx = None
self.origin_in_pixels = None
self.size_in_pixels = None
self.origin_in_inch = None
self.size_in_inch = None
self._xform_matrix = None
def set_bounds(self, bounds):
@property
def origin_in_pixels(self):
return tuple(map(mul, self.origin_in_inch, self.scale)) if self.origin_in_inch is not None else (0.0, 0.0)
@property
def size_in_pixels(self):
return tuple(map(mul, self.size_in_inch, self.scale)) if self.size_in_inch is not None else (0.0, 0.0)
def set_bounds(self, bounds, new_surface=False):
origin_in_inch = (bounds[0][0], bounds[1][0])
size_in_inch = (abs(bounds[0][1] - bounds[0][0]), abs(bounds[1][1] - bounds[1][0]))
size_in_pixels = map(mul, size_in_inch, self.scale)
self.origin_in_pixels = tuple(map(mul, origin_in_inch, self.scale)) if self.origin_in_pixels is None else self.origin_in_pixels
self.size_in_pixels = size_in_pixels if self.size_in_pixels is None else self.size_in_pixels
if self.surface is None:
size_in_pixels = tuple(map(mul, size_in_inch, self.scale))
self.origin_in_inch = origin_in_inch if self.origin_in_inch is None else self.origin_in_inch
self.size_in_inch = size_in_inch if self.size_in_inch is None else self.size_in_inch
if (self.surface is None) or new_surface:
self.surface_buffer = tempfile.NamedTemporaryFile()
self.surface = cairo.SVGSurface(self.surface_buffer, size_in_pixels[0], size_in_pixels[1])
self.ctx = cairo.Context(self.surface)
@ -60,6 +70,58 @@ class GerberCairoContext(GerberContext):
self.mask_ctx.set_fill_rule(cairo.FILL_RULE_EVEN_ODD)
self.mask_ctx.scale(1, -1)
self.mask_ctx.translate(-(origin_in_inch[0] * self.scale[0]), (-origin_in_inch[1]*self.scale[0]) - size_in_pixels[1])
self._xform_matrix = cairo.Matrix(xx=1.0, yy=-1.0, x0=-self.origin_in_pixels[0], y0=self.size_in_pixels[1] + self.origin_in_pixels[1])
def render_layers(self, layers, filename, theme=THEMES['default']):
""" Render a set of layers
"""
self.set_bounds(layers[0].bounds, True)
self._paint_background(True)
for layer in layers:
self._render_layer(layer, theme)
self.dump(filename)
def dump(self, filename):
""" Save image as `filename`
"""
is_svg = filename.lower().endswith(".svg")
if is_svg:
self.surface.finish()
self.surface_buffer.flush()
with open(filename, "w") as f:
self.surface_buffer.seek(0)
f.write(self.surface_buffer.read())
f.flush()
else:
self.surface.write_to_png(filename)
def dump_str(self):
""" Return a string containing the rendered image.
"""
fobj = StringIO()
self.surface.write_to_png(fobj)
return fobj.getvalue()
def dump_svg_str(self):
""" Return a string containg the rendered SVG.
"""
self.surface.finish()
self.surface_buffer.flush()
return self.surface_buffer.read()
def _render_layer(self, layer, theme=THEMES['default']):
settings = theme.get(layer.layer_class, RenderSettings())
self.color = settings.color
self.alpha = settings.alpha
self.invert = settings.invert
if settings.mirror:
raise Warning('mirrored layers aren\'t supported yet...')
if self.invert:
self._clear_mask()
for prim in layer.primitives:
self.render(prim)
if self.invert:
self._render_mask()
def _render_line(self, line, color):
start = map(mul, line.start, self.scale)
@ -178,12 +240,14 @@ class GerberCairoContext(GerberContext):
self._render_circle(circle, color)
def _render_test_record(self, primitive, color):
self.ctx.select_font_face('monospace', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL)
self.ctx.set_font_size(200)
self._render_circle(Circle(primitive.position, 0.01), color)
self.ctx.set_source_rgb(*color)
position = tuple(map(add, primitive.position, self.origin_in_inch))
self.ctx.set_operator(cairo.OPERATOR_OVER)
self.ctx.select_font_face('monospace', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD)
self.ctx.set_font_size(13)
self._render_circle(Circle(position, 0.015), color)
self.ctx.set_source_rgba(*color, alpha=self.alpha)
self.ctx.set_operator(cairo.OPERATOR_OVER if primitive.level_polarity == "dark" else cairo.OPERATOR_CLEAR)
self.ctx.move_to(*[self.scale[0] * (coord + 0.01) for coord in primitive.position])
self.ctx.move_to(*[self.scale[0] * (coord + 0.015) for coord in position])
self.ctx.scale(1, -1)
self.ctx.show_text(primitive.net_name)
self.ctx.scale(1, -1)
@ -196,38 +260,12 @@ class GerberCairoContext(GerberContext):
def _render_mask(self):
self.ctx.set_operator(cairo.OPERATOR_OVER)
ptn = cairo.SurfacePattern(self.mask)
ptn.set_matrix(cairo.Matrix(xx=1.0, yy=-1.0, x0=-self.origin_in_pixels[0], y0=self.size_in_pixels[1] + self.origin_in_pixels[1]))
ptn.set_matrix(self._xform_matrix)
self.ctx.set_source(ptn)
self.ctx.paint()
def _paint_background(self):
if not self.bg:
def _paint_background(self, force=False):
if (not self.bg) or force:
self.bg = True
self.ctx.set_source_rgba(*self.background_color)
self.ctx.set_source_rgba(*self.background_color, alpha=1.0)
self.ctx.paint()
def dump(self, filename):
is_svg = filename.lower().endswith(".svg")
if is_svg:
self.surface.finish()
self.surface_buffer.flush()
with open(filename, "w") as f:
self.surface_buffer.seek(0)
f.write(self.surface_buffer.read())
f.flush()
else:
self.surface.write_to_png(filename)
def dump_str(self):
""" Return a string containing the rendered image.
"""
fobj = StringIO()
self.surface.write_to_png(fobj)
return fobj.getvalue()
def dump_svg_str(self):
""" Return a string containg the rendered SVG.
"""
self.surface.finish()
self.surface_buffer.flush()
return self.surface_buffer.read()

15
gerber/render/render.py
View file

@ -60,7 +60,6 @@ class GerberContext(object):
def __init__(self, units='inch'):
self._units = units
self._color = (0.7215, 0.451, 0.200)
self._drill_color = (0.25, 0.25, 0.25)
self._background_color = (0.0, 0.0, 0.0)
self._alpha = 1.0
self._invert = False
@ -150,7 +149,7 @@ class GerberContext(object):
elif isinstance(primitive, Polygon):
self._render_polygon(primitive, color)
elif isinstance(primitive, Drill):
self._render_drill(primitive, self.drill_color)
self._render_drill(primitive, color)
elif isinstance(primitive, TestRecord):
self._render_test_record(primitive, color)
else:
@ -184,16 +183,10 @@ class GerberContext(object):
pass
class Renderable(object):
def __init__(self, color=None, alpha=None, invert=False):
class RenderSettings(object):
def __init__(self, color=(0.0, 0.0, 0.0), alpha=1.0, invert=False, mirror=False):
self.color = color
self.alpha = alpha
self.invert = invert
self.mirror = mirror
def to_render(self):
""" Override this in subclass. Should return a list of Primitives or Renderables
"""
raise NotImplementedError('to_render() must be implemented in subclass')
def apply_theme(self, theme):
raise NotImplementedError('apply_theme() must be implemented in subclass')

45
gerber/render/theme.py
View file

@ -16,9 +16,14 @@
# limitations under the License.
from .render import RenderSettings
COLORS = {
'black': (0.0, 0.0, 0.0),
'white': (1.0, 1.0, 1.0),
'red': (1.0, 0.0, 0.0),
'green': (0.0, 1.0, 0.0),
'blue' : (0.0, 0.0, 1.0),
'fr-4': (0.290, 0.345, 0.0),
'green soldermask': (0.0, 0.612, 0.396),
'blue soldermask': (0.059, 0.478, 0.651),
@ -30,30 +35,36 @@ COLORS = {
}
class RenderSettings(object):
def __init__(self, color, alpha=1.0, invert=False):
self.color = color
self.alpha = alpha
self.invert = False
class Theme(object):
def __init__(self, **kwargs):
self.background = kwargs.get('background', RenderSettings(COLORS['black'], 0.0))
def __init__(self, name=None, **kwargs):
self.name = 'Default' if name is None else name
self.background = kwargs.get('background', RenderSettings(COLORS['black'], alpha=0.0))
self.topsilk = kwargs.get('topsilk', RenderSettings(COLORS['white']))
self.bottomsilk = kwargs.get('bottomsilk', RenderSettings(COLORS['white']))
self.topmask = kwargs.get('topmask', RenderSettings(COLORS['green soldermask'], 0.8, True))
self.bottommask = kwargs.get('bottommask', RenderSettings(COLORS['green soldermask'], 0.8, True))
self.topmask = kwargs.get('topmask', RenderSettings(COLORS['green soldermask'], alpha=0.8, invert=True))
self.bottommask = kwargs.get('bottommask', RenderSettings(COLORS['green soldermask'], alpha=0.8, invert=True))
self.top = kwargs.get('top', RenderSettings(COLORS['hasl copper']))
self.bottom = kwargs.get('top', RenderSettings(COLORS['hasl copper']))
self.drill = kwargs.get('drill', self.background)
self.drill = kwargs.get('drill', RenderSettings(COLORS['black']))
self.ipc_netlist = kwargs.get('ipc_netlist', RenderSettings(COLORS['red']))
def __getitem__(self, key):
return getattr(self, key)
def get(self, key, noneval=None):
val = getattr(self, key)
return val if val is not None else noneval
THEMES = {
'Default': Theme(),
'Osh Park': Theme(top=COLORS['enig copper'],
bottom=COLORS['enig copper'],
topmask=COLORS['purple soldermask'],
bottommask=COLORS['purple soldermask']),
'default': Theme(),
'OSH Park': Theme(name='OSH Park',
top=RenderSettings(COLORS['enig copper']),
bottom=RenderSettings(COLORS['enig copper']),
topmask=RenderSettings(COLORS['purple soldermask'], alpha=0.8, invert=True),
bottommask=RenderSettings(COLORS['purple soldermask'], alpha=0.8, invert=True)),
'Blue': Theme(name='Blue',
topmask=RenderSettings(COLORS['blue soldermask'], alpha=0.8, invert=True),
bottommask=RenderSettings(COLORS['blue soldermask'], alpha=0.8, invert=True)),
}

33
gerber/tests/test_layers.py Normal file
View file

@ -0,0 +1,33 @@
#! /usr/bin/env python
# -*- coding: utf-8 -*-
# Author: Hamilton Kibbe <ham@hamiltonkib.be>
from .tests import *
from ..layers import guess_layer_class, hints
def test_guess_layer_class():
""" Test layer type inferred correctly from filename
"""
# Add any specific test cases here (filename, layer_class)
test_vectors = [(None, 'unknown'), ('NCDRILL.TXT', 'unknown'),
('example_board.gtl', 'top'),
('exampmle_board.sst', 'topsilk'),
('ipc-d-356.ipc', 'ipc_netlist'),]
for hint in hints:
for ext in hint.ext:
assert_equal(hint.layer, guess_layer_class('board.{}'.format(ext)))
for name in hint.name:
assert_equal(hint.layer, guess_layer_class('{}.pho'.format(name)))
for filename, layer_class in test_vectors:
assert_equal(layer_class, guess_layer_class(filename))
def test_sort_layers():
""" Test layer ordering
"""
pass

16
gerber/utils.py
View file

@ -26,6 +26,7 @@ files.
# Author: Hamilton Kibbe <ham@hamiltonkib.be>
# License:
import os
from math import radians, sin, cos
from operator import sub
@ -219,7 +220,10 @@ def detect_file_format(data):
if 'M48' in line:
return 'excellon'
elif '%FS' in line:
return'rs274x'
return 'rs274x'
elif ((len(line.split()) >= 2) and
(line.split()[0] == 'P') and (line.split()[1] == 'JOB')):
return 'ipc_d_356'
return 'unknown'
@ -288,3 +292,13 @@ def rotate_point(point, angle, center=(0.0, 0.0)):
x = center[0] + (cos(angle) * xdelta) - (sin(angle) * ydelta)
y = center[1] + (sin(angle) * xdelta) - (cos(angle) * ydelta)
return (x, y)
def listdir(directory, ignore_hidden=True, ignore_os=True):
os_files = ('.DS_Store', 'Thumbs.db', 'ethumbs.db')
files = os.listdir(directory)
if ignore_hidden:
files = [f for f in files if not f.startswith('.')]
if ignore_os:
files = [f for f in files if not f in os_files]
return files