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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 2013-2014 Paulo Henrique Silva <ph.silva@gmail.com>
# 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 .parser import CommentStmt, UnknownStmt, EofStmt, ParamStmt, CoordStmt, ApertureStmt
IMAGE_POLARITY_POSITIVE = 1
IMAGE_POLARITY_NEGATIVE = 2
LEVEL_POLARITY_DARK = 1
LEVEL_POLARITY_CLEAR = 2
NOTATION_ABSOLUTE = 1
NOTATION_INCREMENTAL = 2
UNIT_INCH = 1
UNIT_MM = 2
INTERPOLATION_LINEAR = 1
INTERPOLATION_ARC = 2
class GerberCoordFormat(object):
def __init__(self, zeroes, x, y):
self.omit_leading_zeroes = True if zeroes == "L" else False
self.omit_trailing_zeroes = True if zeroes == "T" else False
self.x_int_digits, self.x_dec_digits = [int(d) for d in x]
self.y_int_digits, self.y_dec_digits = [int(d) for d in y]
def resolve(self, x, y):
new_x = x.replace("+", "") if x else None
new_y = y.replace("+", "") if y else None
if new_x is not None:
negative = "-" in new_x
new_x = new_x.replace("-", "")
missing_zeroes = (self.x_int_digits + self.x_dec_digits) - len(new_x)
if missing_zeroes and self.omit_leading_zeroes:
new_x = (missing_zeroes * "0") + new_x
elif missing_zeroes and self.omit_trailing_zeroes:
new_x += missing_zeroes * "0"
new_x = float("{0}{1}.{2}".format("-" if negative else "",
new_x[:self.x_int_digits],
new_x[self.x_int_digits:]))
if new_y is not None:
negative = "-" in new_y
new_y = new_y.replace("-", "")
missing_zeroes = (self.y_int_digits + self.y_dec_digits) - len(new_y)
if missing_zeroes and self.omit_leading_zeroes:
new_y = (missing_zeroes * "0") + new_y
elif missing_zeroes and self.omit_trailing_zeroes:
new_y += missing_zeroes * "0"
new_y = float("{0}{1}.{2}".format("-" if negative else "",
new_y[:self.y_int_digits],
new_y[self.y_int_digits:]))
return new_x, new_y
class GerberContext(object):
coord_format = None
coord_notation = NOTATION_ABSOLUTE
coord_unit = None
x = 0
y = 0
aperture = 0
interpolation = INTERPOLATION_LINEAR
image_polarity = IMAGE_POLARITY_POSITIVE
level_polarity = LEVEL_POLARITY_DARK
def __init__(self):
pass
def set_coord_format(self, zeroes, x, y):
self.coord_format = GerberCoordFormat(zeroes, x, y)
def set_coord_notation(self, notation):
self.coord_notation = NOTATION_ABSOLUTE if notation == "A" else NOTATION_INCREMENTAL
def set_coord_unit(self, unit):
self.coord_unit = UNIT_INCH if unit == "IN" else UNIT_MM
def set_image_polarity(self, polarity):
self.image_polarity = IMAGE_POLARITY_POSITIVE if polarity == "POS" else IMAGE_POLARITY_NEGATIVE
def set_level_polarity(self, polarity):
self.level_polarity = LEVEL_POLARITY_DARK if polarity == "D" else LEVEL_POLARITY_CLEAR
def set_interpolation(self, interpolation):
self.interpolation = INTERPOLATION_LINEAR if interpolation in ("G01", "G1") else INTERPOLATION_ARC
def set_aperture(self, d):
self.aperture = d
def resolve(self, x, y):
x, y = self.coord_format.resolve(x, y)
return x or self.x, y or self.y
def define_aperture(self, d, shape, modifiers):
pass
def move(self, x, y, resolve=True):
if resolve:
self.x, self.y = self.resolve(x, y)
else:
self.x, self.y = x, y
def stroke(self, x, y):
pass
def line(self, x, y):
pass
def arc(self, x, y):
pass
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)
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