Fix rendering for line with rectangular aperture per #12. Still need to do the same for arcs.

1 files changed, 9 insertions, 4 deletions

diff --git a/gerber/render/cairo_backend.py b/gerber/render/cairo_backend.py
index c1df87a..999269b 100644
--- a/gerber/render/cairo_backend.py
+++ b/gerber/render/cairo_backend.py
@@ -26,7 +26,7 @@ SCALE = 400.
 

 

 class GerberCairoContext(GerberContext):

-    def __init__(self, surface=None, size=(1000, 1000)):

+    def __init__(self, surface=None, size=(10000, 10000)):

         GerberContext.__init__(self)

         if surface is None:

             self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,

@@ -58,9 +58,14 @@ class GerberCairoContext(GerberContext):
             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

+        elif isinstance(line.aperture, Rectangle):

+            points = [tuple(map(mul, x, self.scale)) for x in line.vertices]

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

+            self.ctx.set_line_width(0)

+            self.ctx.move_to(*points[0])

+            for point in points[1:]:

+                self.ctx.line_to(*point)

+            self.ctx.fill()

 

     def _render_arc(self, arc, color):

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