mirror of
https://github.com/ae-utbm/sith.git
synced 2024-11-24 18:14:22 +00:00
65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
# -*- coding:utf-8 -*
|
|
#
|
|
# Copyright 2016,2017
|
|
# - Skia <skia@libskia.so>
|
|
#
|
|
# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
|
|
# http://ae.utbm.fr.
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify it under
|
|
# the terms of the GNU General Public License a published by the Free Software
|
|
# Foundation; either version 3 of the License, or (at your option) any later
|
|
# version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful, but WITHOUT
|
|
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
# details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along with
|
|
# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
|
|
# Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
#
|
|
#
|
|
|
|
# Image utils
|
|
|
|
from io import BytesIO
|
|
from PIL import Image, ExifTags
|
|
# from exceptions import IOError
|
|
import PIL
|
|
from django.core.files.base import ContentFile
|
|
|
|
def scale_dimension(width, height, long_edge):
|
|
if width > height:
|
|
ratio = long_edge * 1. / width
|
|
else:
|
|
ratio = long_edge * 1. / height
|
|
return int(width * ratio), int(height * ratio)
|
|
|
|
def resize_image(im, edge, format):
|
|
(w, h) = im.size
|
|
(width, height) = scale_dimension(w, h, long_edge=edge)
|
|
content = BytesIO()
|
|
im = im.resize((width, height), PIL.Image.ANTIALIAS)
|
|
try:
|
|
im.save(fp=content, format=format.upper(), quality=90, optimize=True, progressive=True)
|
|
except IOError:
|
|
PIL.ImageFile.MAXBLOCK = im.size[0] * im.size[1]
|
|
im.save(fp=content, format=format.upper(), quality=90, optimize=True, progressive=True)
|
|
return ContentFile(content.getvalue())
|
|
|
|
def exif_auto_rotate(image):
|
|
for orientation in ExifTags.TAGS.keys() :
|
|
if ExifTags.TAGS[orientation]=='Orientation' : break
|
|
exif=dict(image._getexif().items())
|
|
|
|
if exif[orientation] == 3 :
|
|
image=image.rotate(180, expand=True)
|
|
elif exif[orientation] == 6 :
|
|
image=image.rotate(270, expand=True)
|
|
elif exif[orientation] == 8 :
|
|
image=image.rotate(90, expand=True)
|
|
|
|
return image
|