Beispiel #1
0
    def put(self, file_obj, **kwargs):
        """
        Insert a image in database
        applying field properties (size, thumbnail_size)
        """
        field = self.instance._fields[self.key]

        try:
            img = Image.open(file_obj)
            img_format = img.format
        except:
            raise ValidationError('Invalid image')

        if (field.size and (img.size[0] > field.size['width'] or
                            img.size[1] > field.size['height'])):
            size = field.size

            if size['force']:
                img = ImageOps.fit(img,
                                   (size['width'],
                                    size['height']),
                                   Image.ANTIALIAS)
            else:
                img.thumbnail((size['width'],
                               size['height']),
                              Image.ANTIALIAS)

        thumbnail = None
        if field.thumbnail_size:
            size = field.thumbnail_size

            if size['force']:
                thumbnail = ImageOps.fit(img,
                                   (size['width'],
                                    size['height']),
                                   Image.ANTIALIAS)
            else:
                thumbnail = img.copy()
                thumbnail.thumbnail((size['width'],
                                     size['height']),
                                    Image.ANTIALIAS)

        if thumbnail:
            thumb_id = self._put_thumbnail(thumbnail,
                                          img_format)
        else:
            thumb_id = None

        w, h = img.size

        io = StringIO()
        img.save(io, img_format)
        io.seek(0)

        return super(ImageGridFsProxy, self).put(io,
                                                 width=w,
                                                 height=h,
                                                 format=img_format,
                                                 thumbnail_id=thumb_id,
                                                 **kwargs)
Beispiel #2
0
    def _put_thumbnail(self, thumbnail, format, **kwargs):
        w, h = thumbnail.size

        io = StringIO()
        thumbnail.save(io, format)
        io.seek(0)

        return self.fs.put(io, width=w,
                           height=h,
                           format=format,
                           **kwargs)