1 files changed, 31 insertions, 0 deletions
diff --git a/lib/svg/styles.py b/lib/svg/styles.py
new file mode 100644
index 00000000..c3daaf19
--- /dev/null
+++ b/lib/svg/styles.py
@@ -0,0 +1,31 @@
+# Authors: see git history
+#
+# Copyright (c) 2025 Authors
+# Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
+
+from shapely.geometry import JOIN_STYLE
+
+
+def get_join_style_args(element):
+    """Convert svg line join style to shapely offset_curve arguments."""
+
+    args = {
+        # mitre is the default per SVG spec
+        'join_style': JOIN_STYLE.mitre
+    }
+
+    element_join_style = element.get_style('stroke-linejoin')
+
+    if element_join_style is not None:
+        if element_join_style == "miter":
+            args['join_style'] = JOIN_STYLE.mitre
+
+            # 4 is the default per SVG spec
+            miter_limit = float(element.get_style('stroke-miterlimit', 4))
+            args['mitre_limit'] = miter_limit
+        elif element_join_style == "bevel":
+            args['join_style'] = JOIN_STYLE.bevel
+        elif element_join_style == "round":
+            args['join_style'] = JOIN_STYLE.round
+
+    return args