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-rw-r--r--gerber/render/svgwrite_backend.py165
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diff --git a/gerber/render/svgwrite_backend.py b/gerber/render/svgwrite_backend.py
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+#! /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 .apertures import Circle, Rect, Obround, Polygon
+import svgwrite
+
+SCALE = 300
+
+
+class SvgCircle(Circle):
+ def draw(self, ctx, x, y):
+ return ctx.dwg.line(start=(ctx.x * SCALE, -ctx.y * SCALE),
+ end=(x * SCALE, -y * SCALE),
+ stroke="rgb(184, 115, 51)",
+ stroke_width=SCALE * self.diameter,
+ stroke_linecap="round")
+
+ def flash(self, ctx, x, y):
+ return [ctx.dwg.circle(center=(x * SCALE, -y * SCALE),
+ r = SCALE * (self.diameter / 2.0),
+ fill='rgb(184, 115, 51)'), ]
+
+
+class SvgRect(Rect):
+ def draw(self, ctx, x, y):
+ return ctx.dwg.line(start=(ctx.x * SCALE, -ctx.y * SCALE),
+ end=(x * SCALE, -y * SCALE),
+ stroke="rgb(184, 115, 51)", stroke_width=2,
+ stroke_linecap="butt")
+
+ def flash(self, ctx, x, y):
+ xsize, ysize = self.size
+ return [ctx.dwg.rect(insert=(SCALE * (x - (xsize / 2)),
+ -SCALE * (y + (ysize / 2))),
+ size=(SCALE * xsize, SCALE * ysize),
+ fill="rgb(184, 115, 51)"), ]
+
+
+class SvgObround(Obround):
+ def draw(self, ctx, x, y):
+ pass
+
+ def flash(self, ctx, x, y):
+ xsize, ysize = self.size
+
+ # horizontal obround
+ if xsize == ysize:
+ return [ctx.dwg.circle(center=(x * SCALE, -y * SCALE),
+ r = SCALE * (x / 2.0),
+ fill='rgb(184, 115, 51)'), ]
+ if xsize > ysize:
+ rectx = xsize - ysize
+ recty = ysize
+ lcircle = ctx.dwg.circle(center=((x - (rectx / 2.0)) * SCALE,
+ -y * SCALE),
+ r = SCALE * (ysize / 2.0),
+ fill='rgb(184, 115, 51)')
+
+ rcircle = ctx.dwg.circle(center=((x + (rectx / 2.0)) * SCALE,
+ -y * SCALE),
+ r = SCALE * (ysize / 2.0),
+ fill='rgb(184, 115, 51)')
+
+ rect = ctx.dwg.rect(insert=(SCALE * (x - (xsize / 2.)),
+ -SCALE * (y + (ysize / 2.))),
+ size=(SCALE * xsize, SCALE * ysize),
+ fill='rgb(184, 115, 51)')
+ return [lcircle, rcircle, rect, ]
+
+ # Vertical obround
+ else:
+ rectx = xsize
+ recty = ysize - xsize
+ lcircle = ctx.dwg.circle(center=(x * SCALE,
+ (y - (recty / 2.)) * -SCALE),
+ r = SCALE * (xsize / 2.),
+ fill='rgb(184, 115, 51)')
+
+ ucircle = ctx.dwg.circle(center=(x * SCALE,
+ (y + (recty / 2.)) * -SCALE),
+ r = SCALE * (xsize / 2.),
+ fill='rgb(184, 115, 51)')
+
+ rect = ctx.dwg.rect(insert=(SCALE * (x - (xsize / 2.)),
+ -SCALE * (y + (ysize / 2.))),
+ size=(SCALE * xsize, SCALE * ysize),
+ fill='rgb(184, 115, 51)')
+ return [lcircle, ucircle, rect, ]
+
+
+class GerberSvgContext(GerberContext):
+ def __init__(self):
+ GerberContext.__init__(self)
+
+ self.apertures = {}
+ self.dwg = svgwrite.Drawing()
+ #self.dwg.add(self.dwg.rect(insert=(0, 0), size=(2000, 2000), fill="black"))
+
+ def set_bounds(self, bounds):
+ xbounds, ybounds = bounds
+ size = (SCALE * (xbounds[1] - xbounds[0]), SCALE * (ybounds[1] - ybounds[0]))
+ self.dwg.add(self.dwg.rect(insert=(SCALE * xbounds[0], -SCALE * ybounds[1]), size=size, fill="black"))
+
+ def define_aperture(self, d, shape, modifiers):
+ aperture = None
+ if shape == 'C':
+ aperture = SvgCircle(diameter=float(modifiers[0][0]))
+ elif shape == 'R':
+ aperture = SvgRect(size=modifiers[0][0:2])
+ elif shape == 'O':
+ aperture = SvgObround(size=modifiers[0][0:2])
+ self.apertures[d] = aperture
+
+ def stroke(self, x, y):
+ super(GerberSvgContext, self).stroke(x, y)
+
+ if self.interpolation == 'linear':
+ self.line(x, y)
+ elif self.interpolation == 'arc':
+ self.arc(x, y)
+
+ def line(self, x, y):
+ super(GerberSvgContext, self).line(x, y)
+ x, y = self.resolve(x, y)
+ ap = self.apertures.get(self.aperture, None)
+ if ap is None:
+ return
+ self.dwg.add(ap.draw(self, x, y))
+ self.move(x, y, resolve=False)
+
+ def arc(self, x, y):
+ super(GerberSvgContext, self).arc(x, y)
+
+ def flash(self, x, y):
+ super(GerberSvgContext, self).flash(x, y)
+ x, y = self.resolve(x, y)
+ ap = self.apertures.get(self.aperture, None)
+ if ap is None:
+ return
+ for shape in ap.flash(self, x, y):
+ self.dwg.add(shape)
+ self.move(x, y, resolve=False)
+
+ def drill(self, x, y, diameter):
+ hit = self.dwg.circle(center=(x*SCALE, -y*SCALE), r=SCALE*(diameter/2.0), fill='gray')
+ self.dwg.add(hit)
+
+ def dump(self, filename):
+ self.dwg.saveas(filename)