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https://github.com/gryf/pygtktalog.git
synced 2025-12-17 11:30:19 +01:00
* Refactored Img and Thumnail classes for new media storage.
This commit is contained in:
@@ -24,76 +24,49 @@
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from shutil import copy
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from os import path, mkdir
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from hashlib import sha512
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from tempfile import mkstemp
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from utils import EXIF
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import Image
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class Img(object):
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def __init__(self, filename=None, base=''):
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def __init__(self, filename, base=''):
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self.root = 'images'
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self.x = 160
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self.y = 160
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self.filename = filename
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self.base = base
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f = open(filename, "r")
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self.sha512 = sha512(f.read()).hexdigest()
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f.close()
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def save(self, image_id):
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def save(self):
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"""Save image and asociated thumbnail into specific directory structure
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return full path to the file and thumbnail or None"""
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returns filename for image"""
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base_path = self.__get_and_make_path(image_id)
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ext = self.filename.split('.')[-1].lower()
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image_filename = path.join(self.base, base_path + "." + ext)
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image_filename = path.join(self.base, self.sha512)
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thumbnail = path.join(self.base, self.sha512 + "_t")
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# check wheter image already exists
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if path.exists(image_filename) and path.exists(thumbnail):
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if __debug__:
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print "image", self.filename, "with hash", self.sha512, "already exist"
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return self.sha512
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thumbnail = path.join(self.base, base_path + "_t.jpg")
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returncode = -1
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im = self.__scale_image()
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if im:
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if not path.exists(thumbnail):
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im = self.__scale_image()
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im.save(thumbnail, "JPEG")
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returncode = 1
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if returncode != -1:
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# copy image
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# copy image
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if not path.exists(image_filename):
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copy(self.filename, image_filename)
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return thumbnail, image_filename, returncode
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return self.sha512
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# private class functions
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def __get_and_make_path(self, img_id):
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"""Make directory structure regards of id
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and return filepath and img filename WITHOUT extension"""
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t = path.join(self.base, self.root)
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try: mkdir(t)
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except: pass
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h = hex(img_id)
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if len(h[2:])>6:
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try: mkdir(path.join(t, h[2:4]))
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except: pass
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try: mkdir(path.join(t, h[2:4], h[4:6]))
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except: pass
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fpath = path.join(t, h[2:4], h[4:6], h[6:8])
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try: mkdir(fpath)
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except: pass
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img = "%s" % h[8:]
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elif len(h[2:])>4:
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try: mkdir(path.join(t, h[2:4]))
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except: pass
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fpath = path.join(t, h[2:4], h[4:6])
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try: mkdir(fpath)
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except: pass
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img = "%s" % h[6:]
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elif len(h[2:])>2:
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fpath = path.join(t, h[2:4])
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try: mkdir(fpath)
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except: pass
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img = "%s" % h[4:]
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else:
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fpath = ''
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img = "%s" % h[2:]
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return(path.join(t, fpath, img))
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def __scale_image(self):
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"""create thumbnail. returns image object or None"""
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try:
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@@ -22,189 +22,95 @@
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# -------------------------------------------------------------------------
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from tempfile import gettempdir
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from tempfile import mkstemp
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from hashlib import sha512
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from shutil import move
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from os import path, mkdir
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from datetime import datetime
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from os import path
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import sys
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from utils import EXIF
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import Image
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class Thumbnail(object):
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"""Class for generate/extract thumbnail from image file"""
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def __init__(self, filename=None, x=160, y=160,
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root='thumbnails', base=''):
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self.root = root
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self.x = x
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self.y = y
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def __init__(self, filename=None, base=''):
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self.thumb_x = 160
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self.thumb_y = 160
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self.filename = filename
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self.base = base
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self.sha512 = sha512(open(filename).read()).hexdigest()
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self.thumbnail_path = path.join(self.base, self.sha512 + "_t")
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def save(self, image_id):
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def save(self):
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"""Save thumbnail into specific directory structure
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return full path to the file and exif object or None"""
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filepath = path.join(self.base, self.__get_and_make_path(image_id))
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f = open(self.filename, 'rb')
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exif = None
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returncode = -1
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return filename base and exif object or None"""
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exif = {}
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orientations = {2: Image.FLIP_LEFT_RIGHT, # Mirrored horizontal
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3: Image.ROTATE_180, # Rotated 180
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4: Image.FLIP_TOP_BOTTOM, # Mirrored vertical
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5: Image.ROTATE_90, # Mirrored horizontal then
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# rotated 90 CCW
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6: Image.ROTATE_270, # Rotated 90 CW
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7: Image.ROTATE_270, # Mirrored horizontal then
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# rotated 90 CW
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8: Image.ROTATE_90} # Rotated 90 CCW
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flips = {7: Image.FLIP_LEFT_RIGHT, 5: Image.FLIP_LEFT_RIGHT}
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image_file = open(self.filename, 'rb')
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try:
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exif = EXIF.process_file(f)
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f.close()
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if 'JPEGThumbnail' in exif:
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thumbnail = exif['JPEGThumbnail']
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f = open(filepath,'wb')
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f.write(thumbnail)
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f.close()
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if 'Image Orientation' in exif:
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orientation = exif['Image Orientation'].values[0]
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if orientation > 1:
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# TODO: replace silly datetime function with tempfile
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ms = datetime.now().microsecond
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t = path.join(gettempdir(), "thumb%d.jpg" % ms)
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im_in = Image.open(filepath)
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im_out = None
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if orientation == 8:
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# Rotated 90 CCW
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im_out = im_in.transpose(Image.ROTATE_90)
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elif orientation == 6:
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# Rotated 90 CW
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im_out = im_in.transpose(Image.ROTATE_270)
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elif orientation == 3:
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# Rotated 180
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im_out = im_in.transpose(Image.ROTATE_180)
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elif orientation == 2:
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# Mirrored horizontal
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im_out = im_in.transpose(Image.FLIP_LEFT_RIGHT)
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elif orientation == 4:
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# Mirrored vertical
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im_out = im_in.transpose(Image.FLIP_TOP_BOTTOM)
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elif orientation == 5:
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# Mirrored horizontal then rotated 90 CCW
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op = Image.FLIP_LEFT_RIGHT
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rot = Image.ROTATE_90
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im_out = im_in.transpose(op).transpose(rot)
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elif orientation == 7:
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# Mirrored horizontal then rotated 90 CW
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op = Image.FLIP_LEFT_RIGHT
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rot = Image.ROTATE_270
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im_out = im_in.transpose(op).transpose(rot)
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if im_out:
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im_out.save(t, 'JPEG')
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move(t, filepath)
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else:
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f.close()
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returncode = 0
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else:
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im = self.__scale_image()
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if im:
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im.save(filepath, "JPEG")
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returncode = 1
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exif = EXIF.process_file(image_file)
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except:
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f.close()
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im = self.__scale_image()
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if im:
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im.save(filepath, "JPEG")
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returncode = 2
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return filepath, exif, returncode
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if __debug__:
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print "exception", sys.exc_info()[0], "raised with file:"
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print self.filename
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finally:
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image_file.close()
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# private class functions
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def __get_and_make_path(self, image_id):
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"""Make directory structure regards of id
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and return filepath WITHOUT extension"""
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t = path.join(self.base, self.root)
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try: mkdir(t)
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except: pass
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h = hex(image_id)
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if len(h[2:])>6:
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try: mkdir(path.join(t, h[2:4]))
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except: pass
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try: mkdir(path.join(t, h[2:4], h[4:6]))
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except: pass
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fpath = path.join(t, h[2:4], h[4:6], h[6:8])
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try: mkdir(fpath)
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except: pass
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img = "%s.%s" % (h[8:], 'jpg')
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elif len(h[2:])>4:
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try: mkdir(path.join(t, h[2:4]))
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except: pass
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fpath = path.join(t, h[2:4], h[4:6])
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try: mkdir(fpath)
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except: pass
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img = "%s.%s" % (h[6:], 'jpg')
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elif len(h[2:])>2:
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fpath = path.join(t, h[2:4])
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try: mkdir(fpath)
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except: pass
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img = "%s.%s" %(h[4:], 'jpg')
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if path.exists(self.thumbnail_path):
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if __debug__:
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print "file", self.filename, "with hash", self.sha512, "exists"
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return self.sha512, exif
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if 'JPEGThumbnail' in exif:
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if __debug__:
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print self.filename, "exif thumb"
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exif_thumbnail = exif['JPEGThumbnail']
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thumb_file = open(self.thumbnail_path, 'wb')
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thumb_file.write(exif_thumbnail)
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thumb_file.close()
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if 'Image Orientation' in exif:
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orient = exif['Image Orientation'].values[0]
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if orient > 1 and orient in orientations:
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temp_image_path = mkstemp()[1]
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thumb_image = Image.open(self.thumbnail_path)
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tmp_thumb_img = thumb_image.transpose(orientations[orient])
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if orient in flips:
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tmp_thumb_img = tmp_thumb_img.transpose(flips[orient])
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if tmp_thumb_img:
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tmp_thumb_img.save(temp_image_path, 'JPEG')
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move(temp_image_path, self.thumbnail_path)
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return self.sha512, exif
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else:
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fpath = ''
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img = "%s.%s" %(h[2:], 'jpg')
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return(path.join(t, fpath, img))
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if __debug__:
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print self.filename, "no exif thumb"
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thumb = self.__scale_image()
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if thumb:
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thumb.save(self.thumbnail_path, "JPEG")
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return self.sha512, exif
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return None, exif
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def __scale_image(self):
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"""create thumbnail. returns image object or None"""
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try:
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im = Image.open(self.filename).convert('RGB')
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image_thumb = Image.open(self.filename).convert('RGB')
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except:
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return None
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x, y = im.size
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if x > self.x or y > self.y:
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im.thumbnail((self.x, self.y), Image.ANTIALIAS)
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return im
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def __scale_image_deprecated(self, factor=True):
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"""generate scaled Image object for given file
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args:
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factor - if False, adjust height into self.y
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if True, use self.x for scale portrait pictures height.
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returns Image object, or None
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"""
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try:
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im = Image.open(self.filename).convert('RGB')
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except:
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return None
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x, y = im.size
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if x > self.x or y > self.y:
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if x==y:
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# square
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imt = im.resize((self.y, self.y), Image.ANTIALIAS)
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elif x > y:
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# landscape
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if int(y/(x/float(self.x))) > self.y:
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# landscape image: height is non standard
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self.x1 = int(float(self.y) * self.y / self.x)
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if float(self.y) * self.y / self.x - self.x1 > 0.49:
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self.x1 += 1
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imt = im.resize(((int(x/(y/float(self.y))), self.y)),
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Image.ANTIALIAS)
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elif x/self.x==y/self.y:
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# aspect ratio ok
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imt = im.resize((self.x, self.y), Image.ANTIALIAS)
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else:
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imt = im.resize((self.x, int(y/(x/float(self.x)))), 1)
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else:
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# portrait
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if factor:
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if y>self.x:
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imt = im.resize(((int(x/(y/float(self.x))),self.x)),
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Image.ANTIALIAS)
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else:
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imt = im
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else:
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self.x1 = int(float(self.y) * self.y / self.x)
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if float(self.y) * self.y / self.x - self.x1 > 0.49:
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self.x1 += 1
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if x/self.x1==y/self.y:
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# aspect ratio ok
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imt = im.resize((self.x1,self.y),Image.ANTIALIAS)
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else:
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imt = im.resize(((int(x/(y/float(self.y))), self.y)),
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Image.ANTIALIAS)
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return imt
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else:
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return im
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it_x, it_y = image_thumb.size
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if it_x > self.thumb_x or it_y > self.thumb_y:
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image_thumb.thumbnail((self.thumb_x, self.thumb_y), Image.ANTIALIAS)
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return image_thumb
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