- Author:
- ThisbeTom
- Posted:
- December 9, 2008
- Language:
- HTML/template
- Version:
- Not specified
- Score:
- 2 (after 2 ratings)
Couldn't get the original to work, and wanted more functionality (scale on x or y coordinates)
<img src="{{ object.image.url }}" alt="original image">
<img src="{{ object.image|thumbnail:"250w" }}" alt="image resized to 250w x (calculated/scaled)h ">
<img src="{{ object.image|thumbnail:"250h" }}" alt="image resized to (calculated/scaled)w x 250h h ">
<img src="{{ object.image|thumbnail:"250x200" }}" alt="image resized to 250wx200h ">
<img src="{{ object.image|thumbnail }}" alt="image resized to default 200w (or whatever you default it to) format">
Original http://www.djangosnippets.org/snippets/192/ Adapted http://www.djangosnippets.org/snippets/955/ Sampled From: http://batiste.dosimple.ch/blog/2007-05-13-1/ http://vaig.be/2008/05/17/stdimagefield-improved-image-field-for-django/
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | import os
import Image
from django.template import Library
register = Library()
SCALE_WIDTH = 'w'
SCALE_HEIGHT = 'h'
SCALE_BOTH = 'both'
def scale(max_x, pair):
x, y = pair
new_y = (float(max_x) / x) * y
return (int(max_x), int(new_y))
@register.filter
def thumbnail(file, size='200w'):
# defining the size
if (size.lower().endswith('h')):
mode = 'h'
size = size[:-1]
max_size = int(size.strip())
elif (size.lower().endswith('w')):
mode = 'w'
size = size[:-1]
max_size = int(size.strip())
else:
mode = 'both'
# defining the filename and the miniature filename
filehead, filetail = os.path.split(file.path)
basename, format = os.path.splitext(filetail)
miniature = basename + '_' + size + format
filename = file.path
miniature_filename = os.path.join(filehead, miniature)
filehead, filetail = os.path.split(file.url)
miniature_url = filehead + '/' + miniature
if os.path.exists(miniature_filename) and os.path.getmtime(filename)>os.path.getmtime(miniature_filename):
os.unlink(miniature_filename)
# if the image wasn't already resized, resize it
if not os.path.exists(miniature_filename):
image = Image.open(filename)
image_x, image_y = image.size
if mode == SCALE_HEIGHT:
image_y, image_x = scale(max_size, (image_y, image_x))
elif mode == SCALE_WIDTH:
image_x, image_y = scale(max_size, (image_x, image_y))
elif mode == SCALE_BOTH:
image_x, image_y = [int(x) for x in size.split('x')]
else:
raise Exception("Thumbnail size must be in ##w, ##h, or ##x## format.")
image.thumbnail([image_x, image_y], Image.ANTIALIAS)
try:
image.save(miniature_filename, image.format, quality=90, optimize=1)
except:
image.save(miniature_filename, image.format, quality=90)
return miniature_url
|
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Comments
Just what I wanted, thanks. In case the original image does not exist, I added a try and except block around the whole thing so it return a empty string.
def thumbnail(file, size='200w'):
#
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