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41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
# Image utils
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from io import BytesIO
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from PIL import Image, ExifTags
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# from exceptions import IOError
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import PIL
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from django.core.files.base import ContentFile
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def scale_dimension(width, height, long_edge):
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if width > height:
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ratio = long_edge * 1. / width
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else:
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ratio = long_edge * 1. / height
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return int(width * ratio), int(height * ratio)
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def resize_image(im, edge, format):
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(w, h) = im.size
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(width, height) = scale_dimension(w, h, long_edge=edge)
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content = BytesIO()
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im = im.resize((width, height), PIL.Image.ANTIALIAS)
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try:
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im.save(fp=content, format=format.upper(), quality=90, optimize=True, progressive=True)
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except IOError:
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PIL.ImageFile.MAXBLOCK = im.size[0] * im.size[1]
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im.save(fp=content, format=format.upper(), quality=90, optimize=True, progressive=True)
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return ContentFile(content.getvalue())
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def exif_auto_rotate(image):
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for orientation in ExifTags.TAGS.keys() :
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if ExifTags.TAGS[orientation]=='Orientation' : break
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exif=dict(image._getexif().items())
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if exif[orientation] == 3 :
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image=image.rotate(180, expand=True)
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elif exif[orientation] == 6 :
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image=image.rotate(270, expand=True)
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elif exif[orientation] == 8 :
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image=image.rotate(90, expand=True)
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return image
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