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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
# Modified from code by 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 ..gerber_statements import (
CommentStmt, UnknownStmt, EofStmt, ParamStmt, CoordStmt, ApertureStmt
)
class GerberContext(object):
settings = {}
x = 0
y = 0
aperture = 0
interpolation = 'linear'
image_polarity = 'positive'
level_polarity = 'dark'
def __init__(self):
pass
def set_format(self, settings):
self.settings = settings
def set_coord_format(self, zero_suppression, format, notation):
self.settings['zero_suppression'] = zero_suppression
self.settings['format'] = format
self.settings['notation'] = notation
def set_coord_notation(self, notation):
self.settings['notation'] = notation
def set_coord_unit(self, unit):
self.settings['units'] = unit
def set_image_polarity(self, polarity):
self.image_polarity = polarity
def set_level_polarity(self, polarity):
self.level_polarity = polarity
def set_interpolation(self, interpolation):
self.interpolation = 'linear' if interpolation in ("G01", "G1") else 'arc'
def set_aperture(self, d):
self.aperture = d
def resolve(self, x, y):
x = x if x is not None else self.x
y = y if y is not None else self.y
return x, 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_suppression, stmt.format, stmt.notation)
self.set_coord_notation(stmt.notation)
elif stmt.param == "MO:":
self.set_coord_unit(stmt.mode)
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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