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-rwxr-xr-xgerber/excellon.py180
-rw-r--r--gerber/parser.py48
-rw-r--r--gerber/render.py48
-rw-r--r--gerber/render_svg.py12
-rw-r--r--gerber/utils.py178
5 files changed, 417 insertions, 49 deletions
diff --git a/gerber/excellon.py b/gerber/excellon.py
new file mode 100755
index 0000000..1e746ad
--- /dev/null
+++ b/gerber/excellon.py
@@ -0,0 +1,180 @@
+#!/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.
+
+
+import re
+from itertools import tee, izip
+from .utils import parse_gerber_value
+
+
+
+
+class Tool(object):
+
+ @classmethod
+ def from_line(cls, line, settings):
+ commands = re.split('([BCFHSTZ])', line)[1:]
+ commands = [(command, value) for command, value in pairwise(commands)]
+ args = {}
+ format = settings['format']
+ zero_suppression = settings['zero_suppression']
+ for cmd, val in commands:
+ if cmd == 'B':
+ args['retract_rate'] = parse_gerber_value(val, format, zero_suppression)
+ elif cmd == 'C':
+ args['diameter'] = parse_gerber_value(val, format, zero_suppression)
+ elif cmd == 'F':
+ args['feed_rate'] = parse_gerber_value(val, format, zero_suppression)
+ elif cmd == 'H':
+ args['max_hit_count'] = parse_gerber_value(val, format, zero_suppression)
+ elif cmd == 'S':
+ args['rpm'] = 1000 * parse_gerber_value(val, format, zero_suppression)
+ elif cmd == 'T':
+ args['number'] = int(val)
+ elif cmd == 'Z':
+ args['depth_offset'] = parse_gerber_value(val, format, zero_suppression)
+ return cls(settings, **args)
+
+ def __init__(self, settings, **kwargs):
+ self.number = kwargs.get('number')
+ self.feed_rate = kwargs.get('feed_rate')
+ self.retract_rate = kwargs.get('retract_rate')
+ self.rpm = kwargs.get('rpm')
+ self.diameter = kwargs.get('diameter')
+ self.max_hit_count = kwargs.get('max_hit_count')
+ self.depth_offset = kwargs.get('depth_offset')
+ self.units = settings.get('units', 'inch')
+
+ def __repr__(self):
+ unit = 'in.' if self.units == 'inch' else 'mm'
+ return '<Tool %d: %0.3f%s dia.>' % (self.number, self.diameter, unit)
+
+
+
+class ExcellonParser(object):
+ def __init__(self, ctx=None):
+ self.ctx=ctx
+ self.notation = 'absolute'
+ self.units = 'inch'
+ self.zero_suppression = 'trailing'
+ self.format = (2,5)
+ self.state = 'INIT'
+ self.tools = {}
+ self.hits = []
+ self.active_tool = None
+ self.pos = [0., 0.]
+ if ctx is not None:
+ zeros = 'L' if self.zero_suppression == 'leading' else 'T'
+ x = self.format
+ y = self.format
+ self.ctx.set_coord_format(zeros, x, y)
+ def parse(self, filename):
+ with open(filename, 'r') as f:
+ for line in f:
+ self._parse(line)
+
+ def dump(self, filename='teste.svg'):
+ if self.ctx is not None:
+ self.ctx.dump(filename)
+
+ def _parse(self, line):
+ if 'M48' in line:
+ self.state = 'HEADER'
+
+ if 'G00' in line:
+ self.state = 'ROUT'
+
+ if 'G05' in line:
+ self.state = 'DRILL'
+
+ elif line[0] == '%' and self.state == 'HEADER':
+ self.state = 'DRILL'
+
+ if 'INCH' in line or line.strip() == 'M72':
+ self.units = 'inch'
+
+ elif 'METRIC' in line or line.strip() == 'M71':
+ self.units = 'metric'
+
+ if 'LZ' in line:
+ self.zero_suppression = 'trailing'
+
+ elif 'TZ' in line:
+ self.zero_suppression = 'leading'
+
+ if 'ICI' in line and 'ON' in line or line.strip() == 'G91':
+ self.notation = 'incremental'
+
+ if 'ICI' in line and 'OFF' in line or line.strip() == 'G90':
+ self.notation = 'absolute'
+
+ zs = self._settings()['zero_suppression']
+ fmt = self._settings()['format']
+
+ # tool definition
+ if line[0] == 'T' and self.state == 'HEADER':
+ tool = Tool.from_line(line,self._settings())
+ self.tools[tool.number] = tool
+
+ elif line[0] == 'T' and self.state != 'HEADER':
+ self.active_tool = self.tools[int(line.strip().split('T')[1])]
+
+
+ if line[0] in ['X', 'Y']:
+ x = None
+ y = None
+ if line[0] == 'X':
+ splitline = line.strip('X').split('Y')
+ x = parse_gerber_value(splitline[0].strip(), fmt, zs)
+ if len(splitline) == 2:
+ y = parse_gerber_value(splitline[1].strip(), fmt,zs)
+ else:
+ y = parse_gerber_value(line.strip(' Y'), fmt,zs)
+
+ if self.notation == 'absolute':
+ if x is not None:
+ self.pos[0] = x
+ if y is not None:
+ self.pos[1] = y
+ else:
+ if x is not None:
+ self.pos[0] += x
+ if y is not None:
+ self.pos[1] += y
+ if self.state == 'DRILL':
+ self.hits.append((self.active_tool, self.pos))
+ if self.ctx is not None:
+ self.ctx.drill(self.pos[0], self.pos[1],
+ self.active_tool.diameter)
+
+ def _settings(self):
+ return {'units':self.units, 'zero_suppression':self.zero_suppression,
+ 'format': self.format}
+
+def pairwise(iterator):
+ itr = iter(iterator)
+ while True:
+ yield tuple([itr.next() for i in range(2)])
+
+if __name__ == '__main__':
+ from .render_svg import GerberSvgContext
+ tools = []
+ p = ExcellonParser(GerberSvgContext())
+ p.parse('examples/ncdrill.txt')
+ p.dump('excellon.svg')
+
+ \ No newline at end of file
diff --git a/gerber/parser.py b/gerber/parser.py
index 5dc3a73..8f89211 100644
--- a/gerber/parser.py
+++ b/gerber/parser.py
@@ -242,7 +242,7 @@ class GerberParser(object):
for stmt in self._parse(data):
self.statements.append(stmt)
if self.ctx:
- self._evaluate(stmt)
+ self.ctx.evaluate(stmt)
def dump_json(self):
stmts = {"statements": [stmt.__dict__ for stmt in self.statements]}
@@ -361,49 +361,3 @@ class GerberParser(object):
return (match.groupdict(), data[match.end(0):])
return ({}, None)
-
-
- # really this all belongs in another class - the GerberContext class
- def _evaluate(self, stmt):
- if isinstance(stmt, (CommentStmt, UnknownStmt, EofStmt)):
- return
-
- elif isinstance(stmt, ParamStmt):
- self._evaluate_param(stmt)
-
- elif isinstance(stmt, CoordStmt):
- self._evaluate_coord(stmt)
-
- elif isinstance(stmt, ApertureStmt):
- self._evaluate_aperture(stmt)
-
- else:
- raise Exception("Invalid statement to evaluate")
-
- def _evaluate_param(self, stmt):
- if stmt.param == "FS":
- self.ctx.set_coord_format(stmt.zero, stmt.x, stmt.y)
- self.ctx.set_coord_notation(stmt.notation)
- elif stmt.param == "MO:":
- self.ctx.set_coord_unit(stmt.mo)
- elif stmt.param == "IP:":
- self.ctx.set_image_polarity(stmt.ip)
- elif stmt.param == "LP:":
- self.ctx.set_level_polarity(stmt.lp)
- elif stmt.param == "AD":
- self.ctx.define_aperture(stmt.d, stmt.shape, stmt.modifiers)
-
- def _evaluate_coord(self, stmt):
-
- if stmt.function in ("G01", "G1", "G02", "G2", "G03", "G3"):
- self.ctx.set_interpolation(stmt.function)
-
- if stmt.op == "D01":
- self.ctx.stroke(stmt.x, stmt.y)
- elif stmt.op == "D02":
- self.ctx.move(stmt.x, stmt.y)
- elif stmt.op == "D03":
- self.ctx.flash(stmt.x, stmt.y)
-
- def _evaluate_aperture(self, stmt):
- self.ctx.set_aperture(stmt.d)
diff --git a/gerber/render.py b/gerber/render.py
index dd30ae0..183a59f 100644
--- a/gerber/render.py
+++ b/gerber/render.py
@@ -15,6 +15,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
+from .parser import CommentStmt, UnknownStmt, EofStmt, ParamStmt, CoordStmt, ApertureStmt
IMAGE_POLARITY_POSITIVE = 1
IMAGE_POLARITY_NEGATIVE = 2
@@ -138,3 +139,50 @@ class GerberContext(object):
def flash(self, x, y):
pass
+
+ def drill(self, x, y, diameter):
+ pass
+
+ def evaluate(self, stmt):
+ if isinstance(stmt, (CommentStmt, UnknownStmt, EofStmt)):
+ return
+
+ elif isinstance(stmt, ParamStmt):
+ self._evaluate_param(stmt)
+
+ elif isinstance(stmt, CoordStmt):
+ self._evaluate_coord(stmt)
+
+ elif isinstance(stmt, ApertureStmt):
+ self._evaluate_aperture(stmt)
+
+ else:
+ raise Exception("Invalid statement to evaluate")
+
+ def _evaluate_param(self, stmt):
+ if stmt.param == "FS":
+ self.set_coord_format(stmt.zero, stmt.x, stmt.y)
+ self.set_coord_notation(stmt.notation)
+ elif stmt.param == "MO:":
+ self.set_coord_unit(stmt.mo)
+ elif stmt.param == "IP:":
+ self.set_image_polarity(stmt.ip)
+ elif stmt.param == "LP:":
+ self.set_level_polarity(stmt.lp)
+ elif stmt.param == "AD":
+ self.define_aperture(stmt.d, stmt.shape, stmt.modifiers)
+
+ def _evaluate_coord(self, stmt):
+
+ if stmt.function in ("G01", "G1", "G02", "G2", "G03", "G3"):
+ self.set_interpolation(stmt.function)
+
+ if stmt.op == "D01":
+ self.stroke(stmt.x, stmt.y)
+ elif stmt.op == "D02":
+ self.move(stmt.x, stmt.y)
+ elif stmt.op == "D03":
+ self.flash(stmt.x, stmt.y)
+
+ def _evaluate_aperture(self, stmt):
+ self.set_aperture(stmt.d)
diff --git a/gerber/render_svg.py b/gerber/render_svg.py
index bfe6859..cb42371 100644
--- a/gerber/render_svg.py
+++ b/gerber/render_svg.py
@@ -44,6 +44,9 @@ class Rect(Shape):
stroke_width=2, stroke_linecap="butt")
def flash(self, ctx, x, y):
+ # Center the rectange on x,y
+ x -= (self.size[0] / 2.0)
+ y -= (self.size[0] / 2.0)
return ctx.dwg.rect(insert=(300*x, 300*y), size=(300*float(self.size[0]), 300*float(self.size[1])),
fill="rgb(184, 115, 51)")
@@ -102,5 +105,10 @@ class GerberSvgContext(GerberContext):
self.move(x, y, resolve=False)
- def dump(self):
- self.dwg.saveas("teste.svg")
+ def drill(self, x, y, diameter):
+ hit = self.dwg.circle(center=(x*300, y*300), r=300*(diameter/2.0), fill="gray")
+ self.dwg.add(hit)
+
+
+ def dump(self,filename='teste.svg'):
+ self.dwg.saveas(filename)
diff --git a/gerber/utils.py b/gerber/utils.py
new file mode 100644
index 0000000..00b821b
--- /dev/null
+++ b/gerber/utils.py
@@ -0,0 +1,178 @@
+#!/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.
+"""
+gerber.utils
+============
+**Gerber and Excellon file handling utilities**
+
+This module provides utility functions for working with Gerber and Excellon
+files.
+"""
+
+
+def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
+ """ Convert gerber/excellon formatted string to floating-point number
+
+ .. note::
+ Format and zero suppression are configurable. Note that the Excellon
+ and Gerber formats use opposite terminology with respect to leading
+ and trailing zeros. The Gerber format specifies which zeros are
+ suppressed, while the Excellon format specifies which zeros are
+ included. This function uses the Gerber-file convention, so an
+ Excellon file in LZ (leading zeros) mode would use
+ `zero_suppression='trailing'`
+
+
+ Parameters
+ ----------
+ value : string
+ A Gerber/Excellon-formatted string representing a numerical value.
+
+ format : tuple (int,int)
+ Gerber/Excellon precision format expressed as a tuple containing:
+ (number of integer-part digits, number of decimal-part digits)
+
+ zero_suppression : string
+ Zero-suppression mode. May be 'leading' or 'trailing'
+
+ Returns
+ -------
+ value : float
+ The specified value as a floating-point number.
+
+ """
+ # Format precision
+ integer_digits, decimal_digits = format
+ MAX_DIGITS = integer_digits + decimal_digits
+
+ # Absolute maximum number of digits supported. This will handle up to
+ # 6:7 format, which is somewhat supported, even though the gerber spec
+ # only allows up to 6:6
+ if MAX_DIGITS > 13 or integer_digits > 6 or decimal_digits > 7:
+ raise ValueError('Parser only supports precision up to 6:7 format')
+
+ # Remove extraneous information
+ value = value.strip()
+ value = value.strip(' +')
+ negative = '-' in value
+ if negative:
+ value = value.strip(' -')
+
+ # Handle excellon edge case with explicit decimal. "That was easy!"
+ if '.' in value:
+ return float(value)
+
+ digits = [digit for digit in '0' * MAX_DIGITS]
+ offset = 0 if zero_suppression == 'trailing' else (MAX_DIGITS - len(value))
+ for i, digit in enumerate(value):
+ digits[i + offset] = digit
+
+
+ result = float(''.join(digits[:integer_digits] + ['.'] + digits[integer_digits:]))
+ return -1.0 * result if negative else result
+
+
+def write_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
+ """ Convert a floating point number to a Gerber/Excellon-formatted string.
+
+ .. note::
+ Format and zero suppression are configurable. Note that the Excellon
+ and Gerber formats use opposite terminology with respect to leading
+ and trailing zeros. The Gerber format specifies which zeros are
+ suppressed, while the Excellon format specifies which zeros are
+ included. This function uses the Gerber-file convention, so an
+ Excellon file in LZ (leading zeros) mode would use
+ `zero_suppression='trailing'`
+
+ Parameters
+ ----------
+ value : float
+ A floating point value.
+
+ format : tuple (n=2)
+ Gerber/Excellon precision format expressed as a tuple containing:
+ (number of integer-part digits, number of decimal-part digits)
+
+ zero_suppression : string
+ Zero-suppression mode. May be 'leading' or 'trailing'
+
+ Returns
+ -------
+ value : string
+ The specified value as a Gerber/Excellon-formatted string.
+ """
+ # Format precision
+ integer_digits, decimal_digits = format
+ MAX_DIGITS = integer_digits + decimal_digits
+
+ if MAX_DIGITS > 13 or integer_digits > 6 or decimal_digits > 7:
+ raise ValueError('Parser only supports precision up to 6:7 format')
+
+ # negative sign affects padding, so deal with it at the end...
+ negative = value < 0.0
+ if negative:
+ value = -1.0 * value
+
+ # Format string for padding out in both directions
+ fmtstring = '%%0%d.0%df' % (MAX_DIGITS + 1, decimal_digits)
+
+ digits = [val for val in fmtstring % value if val != '.']
+
+ # Suppression...
+ if zero_suppression == 'trailing':
+ while digits[-1] == '0':
+ digits.pop()
+ else:
+ while digits[0] == '0':
+ digits.pop(0)
+
+ return ''.join(digits) if not negative else ''.join(['-'] + digits)
+
+
+
+def decimal_string(value, precision=6):
+ """ Convert float to string with limited precision
+
+ Parameters
+ ----------
+ value : float
+ A floating point value.
+
+ precision :
+ Maximum number of decimal places to print
+
+ Returns
+ -------
+ value : string
+ The specified value as a string.
+
+ """
+ floatstr = '%0.20g' % value
+ integer = None
+ decimal = None
+ if '.' in floatstr:
+ integer, decimal = floatstr.split('.')
+ elif ',' in floatstr:
+ integer, decimal = floatstr.split(',')
+ if len(decimal) > precision:
+ decimal = decimal[:precision]
+ if integer or decimal:
+ return ''.join([integer, '.', decimal])
+ else:
+ return int(floatstr)
+
+
generated by cgit (git 2.34.1) at 2024-11-08 10:56:19 +0000