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Diffstat (limited to 'gerber/render/rs274x_backend.py')
-rw-r--r--gerber/render/rs274x_backend.py23
1 files changed, 13 insertions, 10 deletions
diff --git a/gerber/render/rs274x_backend.py b/gerber/render/rs274x_backend.py
index 30048c4..c7af2ea 100644
--- a/gerber/render/rs274x_backend.py
+++ b/gerber/render/rs274x_backend.py
@@ -178,11 +178,11 @@ class Rs274xContext(GerberContext):
if hasattr(primitive, 'comment'):
self.body.append(CommentStmt(primitive.comment))
- def _render_line(self, line, color):
+ def _render_line(self, line, color, default_polarity='dark'):
self._select_aperture(line.aperture)
- self._render_level_polarity(line)
+ self._render_level_polarity(line, default_polarity)
# Get the right function
if self._func != CoordStmt.FUNC_LINEAR:
@@ -206,7 +206,7 @@ class Rs274xContext(GerberContext):
elif func:
self.body.append(CoordStmt.mode(func))
- def _render_arc(self, arc, color):
+ def _render_arc(self, arc, color, default_polarity='dark'):
# Optionally set the quadrant mode if it has changed:
if arc.quadrant_mode != self._quadrant_mode:
@@ -221,7 +221,7 @@ class Rs274xContext(GerberContext):
# Select the right aperture if not already selected
self._select_aperture(arc.aperture)
- self._render_level_polarity(arc)
+ self._render_level_polarity(arc, default_polarity)
# Find the right movement mode. Always set to be sure it is really right
dir = arc.direction
@@ -252,20 +252,23 @@ class Rs274xContext(GerberContext):
for p in region.primitives:
+ # Make programmatically generated primitives within a region with
+ # unset level polarity inherit the region's level polarity
if isinstance(p, Line):
- self._render_line(p, color)
+ self._render_line(p, color, default_polarity=region.level_polarity)
else:
- self._render_arc(p, color)
+ self._render_arc(p, color, default_polarity=region.level_polarity)
if self.explicit_region_move_end:
self.body.append(CoordStmt.move(None, None))
self.body.append(RegionModeStmt.off())
- def _render_level_polarity(self, region):
- if region.level_polarity != self._level_polarity:
- self._level_polarity = region.level_polarity
- self.body.append(LPParamStmt.from_region(region))
+ def _render_level_polarity(self, obj, default='dark'):
+ obj_polarity = obj.level_polarity if obj.level_polarity is not None else default
+ if obj_polarity != self._level_polarity:
+ self._level_polarity = obj_polarity
+ self.body.append(LPParamStmt('LP', obj_polarity))
def _render_flash(self, primitive, aperture):