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authorHamilton Kibbe <hkibbe@entic.com>2018-06-05 08:57:37 -0400
committerHamilton Kibbe <hkibbe@entic.com>2018-06-05 08:57:37 -0400
commit5245fb925684b4ebe056e6509bfeca6b167903b5 (patch)
tree56615e66b5a9a2b3e04cf58b0b94604bac7af3f4 /gerber/render/excellon_backend.py
parent31062ba2ce326bf3165c15b325b31b226dc69a11 (diff)
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Fix hard requirement of cairo per #83, and add stubs for required subclass methods to GerberContext per #84
Diffstat (limited to 'gerber/render/excellon_backend.py')
-rw-r--r--gerber/render/excellon_backend.py91
1 files changed, 45 insertions, 46 deletions
diff --git a/gerber/render/excellon_backend.py b/gerber/render/excellon_backend.py
index da5b22b..765d68c 100644
--- a/gerber/render/excellon_backend.py
+++ b/gerber/render/excellon_backend.py
@@ -4,13 +4,13 @@ from ..excellon import DrillSlot
from ..excellon_statements import *
class ExcellonContext(GerberContext):
-
+
MODE_DRILL = 1
- MODE_SLOT =2
-
+ MODE_SLOT =2
+
def __init__(self, settings):
GerberContext.__init__(self)
-
+
# Statements that we write
self.comments = []
self.header = []
@@ -18,57 +18,57 @@ class ExcellonContext(GerberContext):
self.body_start = [RewindStopStmt()]
self.body = []
self.start = [HeaderBeginStmt()]
-
+
# Current tool and position
self.handled_tools = set()
self.cur_tool = None
self.drill_mode = ExcellonContext.MODE_DRILL
self.drill_down = False
self._pos = (None, None)
-
+
self.settings = settings
self._start_header()
self._start_comments()
-
+
def _start_header(self):
"""Create the header from the settings"""
-
+
self.header.append(UnitStmt.from_settings(self.settings))
-
+
if self.settings.notation == 'incremental':
raise NotImplementedError('Incremental mode is not implemented')
else:
self.body.append(AbsoluteModeStmt())
-
+
def _start_comments(self):
-
+
# Write the digits used - this isn't valid Excellon statement, so we write as a comment
self.comments.append(CommentStmt('FILE_FORMAT=%d:%d' % (self.settings.format[0], self.settings.format[1])))
-
+
def _get_end(self):
"""How we end depends on our mode"""
-
+
end = []
-
+
if self.drill_down:
end.append(RetractWithClampingStmt())
end.append(RetractWithoutClampingStmt())
-
+
end.append(EndOfProgramStmt())
-
+
return end
-
+
@property
def statements(self):
return self.start + self.comments + self.header + self.body_start + self.body + self._get_end()
-
- def set_bounds(self, bounds):
+
+ def set_bounds(self, bounds, *args, **kwargs):
pass
-
- def _paint_background(self):
+
+ def paint_background(self):
pass
-
+
def _render_line(self, line, color):
raise ValueError('Invalid Excellon object')
def _render_arc(self, arc, color):
@@ -76,7 +76,7 @@ class ExcellonContext(GerberContext):
def _render_region(self, region, color):
raise ValueError('Invalid Excellon object')
-
+
def _render_level_polarity(self, region):
raise ValueError('Invalid Excellon object')
@@ -85,105 +85,104 @@ class ExcellonContext(GerberContext):
def _render_rectangle(self, rectangle, color):
raise ValueError('Invalid Excellon object')
-
+
def _render_obround(self, obround, color):
raise ValueError('Invalid Excellon object')
-
+
def _render_polygon(self, polygon, color):
raise ValueError('Invalid Excellon object')
-
+
def _simplify_point(self, point):
return (point[0] if point[0] != self._pos[0] else None, point[1] if point[1] != self._pos[1] else None)
def _render_drill(self, drill, color):
-
+
if self.drill_mode != ExcellonContext.MODE_DRILL:
self._start_drill_mode()
-
+
tool = drill.hit.tool
if not tool in self.handled_tools:
self.handled_tools.add(tool)
self.header.append(ExcellonTool.from_tool(tool))
-
+
if tool != self.cur_tool:
self.body.append(ToolSelectionStmt(tool.number))
self.cur_tool = tool
-
+
point = self._simplify_point(drill.position)
self._pos = drill.position
self.body.append(CoordinateStmt.from_point(point))
-
+
def _start_drill_mode(self):
"""
If we are not in drill mode, then end the ROUT so we can do basic drilling
"""
-
+
if self.drill_mode == ExcellonContext.MODE_SLOT:
-
+
# Make sure we are retracted before changing modes
last_cmd = self.body[-1]
if self.drill_down:
self.body.append(RetractWithClampingStmt())
self.body.append(RetractWithoutClampingStmt())
self.drill_down = False
-
+
# Switch to drill mode
self.body.append(DrillModeStmt())
self.drill_mode = ExcellonContext.MODE_DRILL
-
+
else:
raise ValueError('Should be in slot mode')
-
+
def _render_slot(self, slot, color):
-
+
# Set the tool first, before we might go into drill mode
tool = slot.hit.tool
if not tool in self.handled_tools:
self.handled_tools.add(tool)
self.header.append(ExcellonTool.from_tool(tool))
-
+
if tool != self.cur_tool:
self.body.append(ToolSelectionStmt(tool.number))
self.cur_tool = tool
-
+
# Two types of drilling - normal drill and slots
if slot.hit.slot_type == DrillSlot.TYPE_ROUT:
# For ROUT, setting the mode is part of the actual command.
-
+
# Are we in the right position?
if slot.start != self._pos:
if self.drill_down:
# We need to move into the right position, so retract
self.body.append(RetractWithClampingStmt())
self.drill_down = False
-
+
# Move to the right spot
point = self._simplify_point(slot.start)
self._pos = slot.start
self.body.append(CoordinateStmt.from_point(point, mode="ROUT"))
-
+
# Now we are in the right spot, so drill down
if not self.drill_down:
self.body.append(ZAxisRoutPositionStmt())
self.drill_down = True
-
+
# Do a linear move from our current position to the end position
point = self._simplify_point(slot.end)
self._pos = slot.end
self.body.append(CoordinateStmt.from_point(point, mode="LINEAR"))
self.drill_mode = ExcellonContext.MODE_SLOT
-
+
else:
# This is a G85 slot, so do this in normally drilling mode
if self.drill_mode != ExcellonContext.MODE_DRILL:
self._start_drill_mode()
-
+
# Slots don't use simplified points
self._pos = slot.end
self.body.append(SlotStmt.from_points(slot.start, slot.end))
def _render_inverted_layer(self):
pass
- \ No newline at end of file