Allow negative render of soldermask per #50

Update example code and rendering to show change

1 files changed, 31 insertions, 0 deletions

diff --git a/gerber/exceptions.py b/gerber/exceptions.py
new file mode 100644
index 0000000..71defd1
--- /dev/null
+++ b/gerber/exceptions.py
@@ -0,0 +1,31 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright 2015 Hamilton Kibbe <ham@hamiltonkib.be>
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+class ParseError(Exception):
+    pass
+
+class GerberParseError(ParseError):
+    pass
+
+class ExcellonParseError(ParseError):
+    pass
+
+class ExcellonFileError(IOError):
+    pass
+
+class GerberFileError(IOError):
+    pass