Fix a bunch of rendering bugs.

  - 'clear' polarity primitives no longer erase background
  - Added aperture macro support for polygons
  - Added aperture macro rendring support
  - Renderer now creates a new surface for each layer and merges them instead of working
    directly on a single surface
  - Updated examples accordingly

1 files changed, 6 insertions, 3 deletions

diff --git a/gerber/tests/test_rs274x.py b/gerber/tests/test_rs274x.py
index c084e80..d5acfe8 100644
--- a/gerber/tests/test_rs274x.py
+++ b/gerber/tests/test_rs274x.py
@@ -9,31 +9,35 @@ from .tests import *
 
 
 TOP_COPPER_FILE = os.path.join(os.path.dirname(__file__),
-                                'resources/top_copper.GTL')
+                               'resources/top_copper.GTL')
 
 MULTILINE_READ_FILE = os.path.join(os.path.dirname(__file__),
-                                'resources/multiline_read.ger')
+                                   'resources/multiline_read.ger')
 
 
 def test_read():
     top_copper = read(TOP_COPPER_FILE)
     assert(isinstance(top_copper, GerberFile))
 
+
 def test_multiline_read():
     multiline = read(MULTILINE_READ_FILE)
     assert(isinstance(multiline, GerberFile))
     assert_equal(10, len(multiline.statements))
 
+
 def test_comments_parameter():
     top_copper = read(TOP_COPPER_FILE)
     assert_equal(top_copper.comments[0], 'This is a comment,:')
 
+
 def test_size_parameter():
     top_copper = read(TOP_COPPER_FILE)
     size = top_copper.size
     assert_almost_equal(size[0], 2.256900, 6)
     assert_almost_equal(size[1], 1.500000, 6)
 
+
 def test_conversion():
     import copy
     top_copper = read(TOP_COPPER_FILE)
@@ -50,4 +54,3 @@ def test_conversion():
 
     for i, m in zip(top_copper.primitives, top_copper_inch.primitives):
         assert_equal(i, m)
-