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Feature for progressive JPEG. Issue #486

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This commit is contained in:
Yohan Graterol 2014-01-08 14:48:34 -04:30
parent a02c820c2d
commit 341e1e7a6d
1 changed files with 14 additions and 4 deletions
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18
mongoengine/fields.py
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@ -1312,6 +1312,16 @@ class ImageGridFsProxy(GridFSProxy):
except Exception, e:
raise ValidationError('Invalid image: %s' % e)
# Progressive JPEG
progressive = img.info.get('progressive') or False
if (kwargs.get('progressive') and
isinstance(kwargs.get('progressive'), bool) and
img_format == 'JPEG'):
progressive = True
else:
progressive = False
if (field.size and (img.size[0] > field.size['width'] or
img.size[1] > field.size['height'])):
size = field.size
@ -1339,14 +1349,14 @@ class ImageGridFsProxy(GridFSProxy):
Image.ANTIALIAS)
if thumbnail:
thumb_id = self._put_thumbnail(thumbnail, img_format)
thumb_id = self._put_thumbnail(thumbnail, img_format, progressive)
else:
thumb_id = None
w, h = img.size
io = StringIO()
img.save(io, img_format)
img.save(io, img_format, progressive=progressive)
io.seek(0)
return super(ImageGridFsProxy, self).put(io,
@ -1364,11 +1374,11 @@ class ImageGridFsProxy(GridFSProxy):
return super(ImageGridFsProxy, self).delete(*args, **kwargs)
def _put_thumbnail(self, thumbnail, format, **kwargs):
def _put_thumbnail(self, thumbnail, format, progressive, **kwargs):
w, h = thumbnail.size
io = StringIO()
thumbnail.save(io, format)
thumbnail.save(io, format, progressive=progressive)
io.seek(0)
return self.fs.put(io, width=w,