ci: Create layout image with klayout
diff --git a/scripts/klayout_save_image.py b/scripts/klayout_save_image.py
new file mode 100644
index 0000000..9f68f15
--- /dev/null
+++ b/scripts/klayout_save_image.py
@@ -0,0 +1,28 @@
+# SPDX-FileCopyrightText: 2022 Greg Davill
+#
+# 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+lv = pya.LayoutView.current()
+ly = pya.CellView.active().layout()
+
+# top cell bounding box in micrometer units
+bbox = ly.top_cell().dbbox()
+
+# compute an image size having the same aspect ratio than
+# the bounding box
+w = 1200
+h = int(0.5 + w * bbox.height() / bbox.width())
+
+lv.save_image_with_options('layout.png', w, h, 0, 0, 0, bbox, False)