Update line primitive to take aperture parameter

This fixes the exception referenced in #12. Still need to add rendering
code for rectangle aperture lines and arcs.

Rectangle strokes will be drawn as polygons by the rendering backends.

1 files changed, 13 insertions, 7 deletions

diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py
index 125a125..c1df87a 100644
--- a/gerber/render/cairo_backend.py
+++ b/gerber/render/cairo_backend.py
@@ -20,6 +20,8 @@ from operator import mul
 import cairocffi as cairo

 import math

 

+from ..primitives import *

+

 SCALE = 400.

 

 

@@ -48,13 +50,17 @@ class GerberCairoContext(GerberContext):
     def _render_line(self, line, color):

         start = map(mul, line.start, self.scale)

         end = map(mul, line.end, self.scale)

-        width = line.width if line.width != 0 else 0.001

-        self.ctx.set_source_rgba(*color, alpha=self.alpha)

-        self.ctx.set_line_width(width * SCALE)

-        self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)

-        self.ctx.move_to(*start)

-        self.ctx.line_to(*end)

-        self.ctx.stroke()

+        if isinstance(line.aperture, Circle):

+            width = line.aperture.diameter if line.aperture.diameter != 0 else 0.001

+            self.ctx.set_source_rgba(*color, alpha=self.alpha)

+            self.ctx.set_line_width(width * SCALE)

+            self.ctx.set_line_cap(cairo.LINE_CAP_ROUND)

+            self.ctx.move_to(*start)

+            self.ctx.line_to(*end)

+            self.ctx.stroke()

+        elif isinstance(line.aperture, rectangle):

+            # TODO: Render rectangle strokes as a polygon...

+            pass

 

     def _render_arc(self, arc, color):

         center = map(mul, arc.center, self.scale)