added sketch2PNG

pysketcher/shapes.py

@@ -15,6 +15,7 @@ import pprint, copy, glob, os
 from math import radians
 from io import BytesIO
 from ruamel.yaml import YAML
+from PIL import Image
 
 from .MatplotlibDraw import MatplotlibDraw
 drawing_tool = MatplotlibDraw()
@@ -24,6 +25,12 @@ def sketch2SVG():
     drawing_tool.mpl.savefig(f, format="svg")
     return f.getvalue()
 
+def sketch2PNG():
+    f = BytesIO()
+    drawing_tool.mpl.gcf().canvas.print_png(f)
+    img = Image.open(f)
+    return img
+
 def sketchParse(sketch, container):
     yaml = YAML()
     gwd = yaml.load(sketch)