Changeset 5780 for branches

Timestamp:

Jul 29, 2015 9:25:28 PM (9 years ago)

Author:

mmh

Message:

compatibility fixes for older python PIL libraries

File:

• branches/uq/examples/zoo/image/image.py (modified) (2 diffs)

branches/uq/examples/zoo/image/image.py

@@ -16 +16 @@
 from Rappture.encoding import decode, encode
 
+
 # uncomment these for debugging
 # sys.stdout = open('image.out', 'w')
 # sys.stderr = open('image.err', 'w')
+
+
+# rotate image data
+def rotate_image(data, angle):
+
+    # bug workaround in some PIL versions
+    def fileno():
+        raise AttributeError
+
+    # open image from data and rotate
+    image = Image.open(BytesIO(data))
+    rot = image.rotate(angle, expand=True)
+    # save image to a file in memory
+    memfile = BytesIO()
+    memfile.fileno = fileno  # required in some broken PILs
+    rot.save(memfile, image.format)
+    return memfile.getvalue()
+
 
 # open the XML file containing the run parameters
@@ -30 +49 @@
 angle = float(Rappture.Units.convert(angle, to='deg', units='off'))
 
+rx['output.image(outi).about.label'] = "Rotated Image"
 
-rx['output.image(outi).about.label'] = "Rotated Image"
-image = Image.open(BytesIO(data))
-image = image.rotate(angle, expand=True)
-
-# save image to a file in memory
-memfile = BytesIO()
-image.save(memfile, 'GIF')
-data = memfile.getvalue()
+data = rotate_image(data, angle)
 
 # Image data must be B64 or ZB64 encoded.