Allow change quality when RESIZE

gluon/contrib/imageutils.py

@@ -6,15 +6,17 @@
 #
 # Given the model
 #
-# db.define_table("table_name", Field("picture", "upload"), Field("thumbnail", "upload"))
+# db.define_table("table_name", Field("picture", "upload"),
+#                 Field("thumbnail", "upload"))
 #
-# # to resize the picture on upload
+# to resize the picture on upload
 #
 # from images import RESIZE
 #
 # db.table_name.picture.requires = RESIZE(200, 200)
 #
-# # to store original image in picture and create a thumbnail in 'thumbnail' field
+# to store original image in picture and create a thumbnail
+# in 'thumbnail' field
 #
 # from images import THUMB
 # db.table_name.thumbnail.compute = lambda row: THUMB(row.picture, 200, 200)
@@ -24,8 +26,11 @@ from gluon import current
 
 
 class RESIZE(object):
-    def __init__(self, nx=160, ny=80, error_message=' image resize'):
+
-        (self.nx, self.ny, self.error_message) = (nx, ny, error_message)
+    def __init__(self, nx=160, ny=80, quality=100,
+                 error_message=' image resize'):
+        (self.nx, self.ny, self.quality, self.error_message) = (
+            nx, ny, quality, error_message)
 
     def __call__(self, value):
         if isinstance(value, str) and len(value) == 0:
@@ -36,7 +41,7 @@ class RESIZE(object):
             img = Image.open(value.file)
             img.thumbnail((self.nx, self.ny), Image.ANTIALIAS)
             s = cStringIO.StringIO()
-            img.save(s, 'JPEG', quality=100)
+            img.save(s, 'JPEG', quality=self.quality)
             s.seek(0)
             value.file = s
         except:
@@ -51,7 +56,7 @@ def THUMB(image, nx=120, ny=120, gae=False, name='thumb'):
             request = current.request
             from PIL import Image
             import os
-            img = Image.open(os.path.join(request.folder,'uploads',image))
+            img = Image.open(os.path.join(request.folder, 'uploads', image))
             img.thumbnail((nx, ny), Image.ANTIALIAS)
             root, ext = os.path.splitext(image)
             thumb = '%s_%s%s' % (root, name, ext)