Allow negative render of soldermask per #50

Update example code and rendering to show change

1 files changed, 39 insertions, 27 deletions

diff --git a/gerber/rs274x.py b/gerber/rs274x.py
index 9fd63da..d9fd317 100644
--- a/gerber/rs274x.py
+++ b/gerber/rs274x.py
@@ -26,7 +26,7 @@ try:
     from cStringIO import StringIO
 except(ImportError):
     from io import StringIO
-    
+
 from .gerber_statements import *
 from .primitives import *
 from .cam import CamFile, FileSettings
@@ -49,8 +49,21 @@ def read(filename):
 
 
 def loads(data):
+    """ Generate a GerberFile object from rs274x data in memory
+
+    Parameters
+    ----------
+    data : string
+        string containing gerber file contents
+
+    Returns
+    -------
+    file : :class:`gerber.rs274x.GerberFile`
+        A GerberFile created from the specified file.
+    """
     return GerberParser().parse_raw(data)
 
+
 class GerberFile(CamFile):
     """ A class representing a single gerber file
 
@@ -215,7 +228,7 @@ class GerberParser(object):
     def parse(self, filename):
         with open(filename, "rU") as fp:
             data = fp.read()
-        return self.parse_raw(data, filename=None)
+        return self.parse_raw(data, filename)
 
     def parse_raw(self, data, filename=None):
         lines = [line for line in StringIO(data)]
@@ -254,27 +267,10 @@ class GerberParser(object):
                 oldline = line
                 continue
 
-
             did_something = True  # make sure we do at least one loop
             while did_something and len(line) > 0:
                 did_something = False
 
-                # Region Mode
-                (mode, r) = _match_one(self.REGION_MODE_STMT, line)
-                if mode:
-                    yield RegionModeStmt.from_gerber(line)
-                    line = r
-                    did_something = True
-                    continue
-
-                # Quadrant Mode
-                (mode, r) = _match_one(self.QUAD_MODE_STMT, line)
-                if mode:
-                    yield QuadrantModeStmt.from_gerber(line)
-                    line = r
-                    did_something = True
-                    continue
-
                 # coord
                 (coord, r) = _match_one(self.COORD_STMT, line)
                 if coord:
@@ -292,14 +288,6 @@ class GerberParser(object):
                     line = r
                     continue
 
-                # comment
-                (comment, r) = _match_one(self.COMMENT_STMT, line)
-                if comment:
-                    yield CommentStmt(comment["comment"])
-                    did_something = True
-                    line = r
-                    continue
-
                 # parameter
                 (param, r) = _match_one_from_many(self.PARAM_STMT, line)
 
@@ -350,6 +338,30 @@ class GerberParser(object):
                     line = r
                     continue
 
+                # Region Mode
+                (mode, r) = _match_one(self.REGION_MODE_STMT, line)
+                if mode:
+                    yield RegionModeStmt.from_gerber(line)
+                    line = r
+                    did_something = True
+                    continue
+
+                # Quadrant Mode
+                (mode, r) = _match_one(self.QUAD_MODE_STMT, line)
+                if mode:
+                    yield QuadrantModeStmt.from_gerber(line)
+                    line = r
+                    did_something = True
+                    continue
+
+                # comment
+                (comment, r) = _match_one(self.COMMENT_STMT, line)
+                if comment:
+                    yield CommentStmt(comment["comment"])
+                    did_something = True
+                    line = r
+                    continue
+
                 # deprecated codes
                 (deprecated_unit, r) = _match_one(self.DEPRECATED_UNIT, line)
                 if deprecated_unit: