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Merge pull request #45 from curtacircuitos/remove-svgwrite-backend

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Remove svgwrite backend
This commit is contained in:
Hamilton Kibbe 2015-11-15 22:16:03 -05:00
commit ba82d60cb8
5 changed files with 4 additions and 137 deletions
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4
README.md
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@ -9,14 +9,14 @@ Tools to handle Gerber and Excellon files in Python.
Useage Example:
---------------
import gerber
from gerber.render import GerberSvgContext
from gerber.render import GerberCairoContext
# Read gerber and Excellon files
top_copper = gerber.read('example.GTL')
nc_drill = gerber.read('example.txt')
# Rendering context
ctx = GerberSvgContext()
ctx = GerberCairoContext()
# Create SVG image
top_copper.render(ctx)

4
gerber/__main__.py
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@ -17,14 +17,14 @@
if __name__ == '__main__':
from gerber.common import read
from gerber.render import GerberSvgContext
from gerber.render import GerberCairoContext
import sys
if len(sys.argv) < 2:
sys.stderr.write("Usage: python -m gerber <filename> <filename>...\n")
sys.exit(1)
ctx = GerberSvgContext()
ctx = GerberCairoContext()
ctx.alpha = 0.95
for filename in sys.argv[1:]:
print("parsing %s" % filename)

1
gerber/render/__init__.py
View file

@ -24,5 +24,4 @@ SVG is the only supported format.
"""
from .svgwrite_backend import GerberSvgContext
from .cairo_backend import GerberCairoContext

130
gerber/render/svgwrite_backend.py
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@ -1,130 +0,0 @@
#! /usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
# Based on render_svg.py 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 .render import GerberContext
from operator import mul
import math
import svgwrite
from ..primitives import *
SCALE = 400.
def svg_color(color):
color = tuple([int(ch * 255) for ch in color])
return 'rgb(%d, %d, %d)' % color
class GerberSvgContext(GerberContext):
def __init__(self):
GerberContext.__init__(self)
self.scale = (SCALE, -SCALE)
self.dwg = svgwrite.Drawing()
self.background = False
def dump(self, filename):
self.dwg.saveas(filename)
def set_bounds(self, bounds):
xbounds, ybounds = bounds
size = (SCALE * (xbounds[1] - xbounds[0]),
SCALE * (ybounds[1] - ybounds[0]))
if not self.background:
vbox = '%f, %f, %f, %f' % (SCALE * xbounds[0], -SCALE * ybounds[1],
size[0], size[1])
self.dwg = svgwrite.Drawing(viewBox=vbox)
rect = self.dwg.rect(insert=(SCALE * xbounds[0],
-SCALE * ybounds[1]),
size=size,
fill=svg_color(self.background_color))
self.dwg.add(rect)
self.background = True
def _render_line(self, line, color):
start = map(mul, line.start, self.scale)
end = map(mul, line.end, self.scale)
if isinstance(line.aperture, Circle):
width = line.aperture.diameter if line.aperture.diameter != 0 else 0.001
aline = self.dwg.line(start=start, end=end,
stroke=svg_color(color),
stroke_width=SCALE * width,
stroke_linecap='round')
aline.stroke(opacity=self.alpha)
self.dwg.add(aline)
elif isinstance(line.aperture, Rectangle):
points = [tuple(map(mul, point, self.scale)) for point in line.vertices]
path = self.dwg.path(d='M %f, %f' % points[0],
fill=svg_color(color),
stroke='none')
path.fill(opacity=self.alpha)
for point in points[1:]:
path.push('L %f, %f' % point)
self.dwg.add(path)
def _render_arc(self, arc, color):
start = tuple(map(mul, arc.start, self.scale))
end = tuple(map(mul, arc.end, self.scale))
radius = SCALE * arc.radius
width = arc.aperture.diameter if arc.aperture.diameter != 0 else 0.001
arc_path = self.dwg.path(d='M %f, %f' % start,
stroke=svg_color(color),
stroke_width=SCALE * width)
large_arc = arc.sweep_angle >= 2 * math.pi
direction = '-' if arc.direction == 'clockwise' else '+'
arc_path.push_arc(end, 0, radius, large_arc, direction, True)
self.dwg.add(arc_path)
def _render_region(self, region, color):
points = [tuple(map(mul, point, self.scale)) for point in region.points]
region_path = self.dwg.path(d='M %f, %f' % points[0],
fill=svg_color(color),
stroke='none')
region_path.fill(opacity=self.alpha)
for point in points[1:]:
region_path.push('L %f, %f' % point)
self.dwg.add(region_path)
def _render_circle(self, circle, color):
center = map(mul, circle.position, self.scale)
acircle = self.dwg.circle(center=center,
r = SCALE * circle.radius,
fill=svg_color(color))
acircle.fill(opacity=self.alpha)
self.dwg.add(acircle)
def _render_rectangle(self, rectangle, color):
center = tuple(map(mul, rectangle.position, self.scale))
size = tuple(map(mul, (rectangle.width, rectangle.height), map(abs, self.scale)))
insert = center[0] - size[0] / 2., center[1] - size[1] / 2.
arect = self.dwg.rect(insert=insert, size=size,
fill=svg_color(color))
arect.fill(opacity=self.alpha)
self.dwg.add(arect)
def _render_obround(self, obround, color):
self._render_circle(obround.subshapes['circle1'], color)
self._render_circle(obround.subshapes['circle2'], color)
self._render_rectangle(obround.subshapes['rectangle'], color)
def _render_drill(self, circle, color):
center = map(mul, circle.position, self.scale)
hit = self.dwg.circle(center=center, r=SCALE * circle.radius,
fill=svg_color(color))
self.dwg.add(hit)

2
requirements.txt
View file

@ -1,4 +1,2 @@
## The following requirements were added by pip --freeze:
cairocffi==0.6
svgwrite==1.1.6