Make thumbnails.
Jason A. Donenfeld
parent
c05145aee2
commit
536bc214c0
114
PhotoAlbum.py
114
PhotoAlbum.py
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@ -6,6 +6,8 @@ from PIL.ExifTags import TAGS
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def set_cache_path_base(base):
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trim_base.base = base
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def untrim_base(path):
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return os.path.join(trim_base.base, path)
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def trim_base(path):
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if path.startswith(trim_base.base):
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path = path[len(trim_base.base):]
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@ -41,7 +43,7 @@ class Album(object):
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def date(self):
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self._sort()
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if len(self._photos) == 0 and len(self._albums) == 0:
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return datetime.min
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return datetime(1900, 1, 1)
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elif len(self._photos) == 0:
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return self._albums[-1].date
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elif len(self._albums) == 0:
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@ -77,7 +79,7 @@ class Album(object):
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def from_dict(dictionary, cripple=True):
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album = Album(dictionary["path"])
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for photo in dictionary["photos"]:
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album.add_photo(Photo.from_dict(photo, album.path))
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album.add_photo(Photo.from_dict(photo, untrim_base(album.path)))
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if not cripple:
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for subalbum in dictionary["albums"]:
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album.add_album(Album.from_dict(subalbum), cripple)
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@ -90,46 +92,104 @@ class Album(object):
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else:
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subalbums = self._albums
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return { "path": self.path, "date": self.date, "albums": subalbums, "photos": self._photos }
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def photo_from_path(self, path):
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for photo in self._photos:
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if trim_base(path) == photo._path:
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print "cache hit %s" % path
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return photo
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return None
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class Photo(object):
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def __init__(self, path, attributes=None):
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def __init__(self, path, thumb_path=None, attributes=None):
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self._path = trim_base(path)
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self.is_valid = True
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mtime = datetime.fromtimestamp(os.path.getmtime(path))
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if attributes is not None and attributes["FileTime"] >= mtime:
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if attributes is not None and attributes["DateTimeFile"] >= mtime:
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self._attributes = attributes
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return
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self._attributes = {}
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self._attributes["FileTime"] = mtime
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self._attributes["DateTimeFile"] = mtime
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try:
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i = Image.open(path)
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image = Image.open(path)
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except:
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self.is_valid = False
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return
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self._metadata(image)
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self._thumbnails(image, thumb_path)
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def _metadata(self, image):
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try:
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info = i._getexif()
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info = image._getexif()
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except:
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info = None
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if info:
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for tag, value in info.items():
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decoded = TAGS.get(tag, tag)
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if not isinstance(decoded, int) and decoded not in ['JPEGThumbnail', 'TIFFThumbnail', 'Filename', 'FileSource', 'MakerNote', 'UserComment', 'ImageDescription', 'ComponentsConfiguration']:
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if isinstance(value, str):
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value = value.strip()
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if decoded.startswith("DateTime"):
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try:
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value = datetime.strptime(value, '%Y:%m:%d %H:%M:%S')
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except:
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pass
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self._attributes[decoded] = value
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return
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for tag, value in info.items():
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decoded = TAGS.get(tag, tag)
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if not isinstance(decoded, int) and decoded not in ['JPEGThumbnail', 'TIFFThumbnail', 'Filename', 'FileSource', 'MakerNote', 'UserComment', 'ImageDescription', 'ComponentsConfiguration']:
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if isinstance(value, str):
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value = value.strip()
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if decoded.startswith("DateTime"):
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try:
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value = datetime.strptime(value, '%Y:%m:%d %H:%M:%S')
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except:
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pass
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self._attributes[decoded] = value
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def _thumbnail(self, image, thumb_path, size, square=False):
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if square:
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suffix = str(size) + "s"
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else:
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suffix = str(size)
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thumb_path = os.path.join(thumb_path, image_cache(self._path, suffix))
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if os.path.exists(thumb_path) and datetime.fromtimestamp(os.path.getmtime(thumb_path)) >= self._attributes["DateTimeFile"]:
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return
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image = image.copy()
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if square:
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if image.size[0] > image.size[1]:
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left = (image.size[0] - image.size[1]) / 2
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top = 0
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right = image.size[0] - ((image.size[0] - image.size[1]) / 2)
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bottom = image.size[1]
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else:
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left = 0
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top = (image.size[1] - image.size[0]) / 2
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right = image.size[0]
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bottom = image.size[1] - ((image.size[1] - image.size[0]) / 2)
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image = image.crop((left, top, right, bottom))
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image.thumbnail((size, size), Image.ANTIALIAS)
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image.save(thumb_path, "JPEG")
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print "saving %s" % thumb_path
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def _thumbnails(self, image, thumb_path):
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orientation = self._attributes["Orientation"]
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mirror = image
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if orientation == 2:
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# Vertical Mirror
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mirror = image.transpose(Image.FLIP_LEFT_RIGHT)
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elif orientation == 3:
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# Rotation 180
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mirror = image.transpose(Image.ROTATE_180)
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elif orientation == 4:
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# Horizontal Mirror
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mirror = image.transpose(Image.FLIP_TOP_BOTTOM)
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elif orientation == 5:
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# Horizontal Mirror + Rotation 270
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mirror = image.transpose(Image.FLIP_TOP_BOTTOM).transpose(Image.ROTATE_270)
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elif orientation == 6:
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# Rotation 270
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mirror = image.transpose(Image.ROTATE_270)
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elif orientation == 7:
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# Vertical Mirror + Rotation 270
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mirror = image.transpose(Image.FLIP_LEFT_RIGHT).transpose(Image.ROTATE_270)
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elif orientation == 8:
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# Rotation 90
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mirror = image.transpose(Image.ROTATE_90)
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self._thumbnail(mirror, thumb_path, 100, True)
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self._thumbnail(mirror, thumb_path, 640)
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self._thumbnail(mirror, thumb_path, 1024)
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@property
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def name(self):
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return os.path.basename(self._path)
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def __str__(self):
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return self.name
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def cache_path(self, size):
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return image_cache(self.path, size)
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@property
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def date(self):
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if "DateTimeOriginal" in self._attributes:
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@ -137,7 +197,7 @@ class Photo(object):
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elif "DateTime" in self._attributes:
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return self._attributes["DateTime"]
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else:
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return self._attributes["FileTime"]
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return self._attributes["DateTimeFile"]
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def __cmp__(self, other):
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return cmp(self.date, other.date)
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@property
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@ -148,6 +208,12 @@ class Photo(object):
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del dictionary["date"]
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path = os.path.join(basepath, dictionary["name"])
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del dictionary["name"]
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for key, value in dictionary.items():
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if key.startswith("DateTime"):
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try:
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dictionary[key] = datetime.strptime(dictionary[key], "%a %b %d %H:%M:%S %Y")
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except:
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pass
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return Photo(path, dictionary)
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def to_dict(self):
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photo = { "name": self.name, "date": self.date }
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@ -157,7 +223,7 @@ class Photo(object):
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class PhotoAlbumEncoder(json.JSONEncoder):
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def default(self, obj):
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if isinstance(obj, datetime):
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return obj.isoformat()
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return obj.strftime("%a %b %d %H:%M:%S %Y")
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if isinstance(obj, Album) or isinstance(obj, Photo):
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return obj.to_dict()
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return json.JSONEncoder.default(self, obj)
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@ -1,5 +1,6 @@
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import os
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import os.path
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from datetime import datetime
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from PhotoAlbum import Photo, Album, json_cache, set_cache_path_base
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class TreeWalker:
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@ -14,17 +15,27 @@ class TreeWalker:
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def walk(self, path):
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cache = os.path.join(self.cache_path, json_cache(path))
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cached = False
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if os.path.exists(cache) and os.path.getmtime(path) <= os.path.getmtime(cache):
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album = Album.from_cache(cache)
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cached = True
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else:
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cached_album = None
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if os.path.exists(cache):
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cached_album = Album.from_cache(cache)
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if os.path.getmtime(path) <= os.path.getmtime(cache):
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cached = True
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album = cached_album
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if not cached:
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album = Album(path)
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for entry in os.listdir(path):
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entry = os.path.join(path, entry)
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if os.path.isdir(entry):
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album.add_album(self.walk(entry))
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elif not cached and os.path.isfile(entry):
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photo = Photo(entry)
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cache_hit = False
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if cached_album:
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cached_photo = cached_album.photo_from_path(entry)
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if cached_photo and datetime.fromtimestamp(os.path.getmtime(entry)) <= cached_photo.attributes["DateTimeFile"]:
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cache_hit = True
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photo = cached_photo
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if not cache_hit:
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photo = Photo(entry, self.cache_path)
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if photo.is_valid:
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self.all_photos.append(photo)
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album.add_photo(photo)
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