感谢 Timmy O'Mahony 提出的创建处理器来进行填充的建议。这是遇到类似问题的人的代码。为了让它工作,你需要在设置中这样的东西:
THUMBNAIL_PROCESSORS = (
'easy_thumbnails.processors.colorspace',
'common.thumbnail_processors.pad_image',
'easy_thumbnails.processors.autocrop',
'easy_thumbnails.processors.scale_and_crop',
'easy_thumbnails.processors.filters')
然后您可以将其添加到 common/thumbnail_processors.py(或任何地方)
import Image
def pad_image(image, **kwargs):
""" Pad an image to make it the same aspect ratio of the desired thumbnail.
"""
img_size = image.size
des_size = kwargs['size']
fit = [float(img_size[i])/des_size[i] for i in range(0,2)]
if fit[0] > fit[1]:
new_image = image.resize((image.size[0],
int(round(des_size[1]*fit[0]))))
top = int((new_image.size[1] - image.size[1])/2)
left = 0
elif fit[0] < fit[1]:
new_image = image.resize((int(round(des_size[0]*fit[1])),
image.size[1]))
top = 0
left = int((new_image.size[0] - image.size[0])/2)
else:
return image
# For transparent
#mask=Image.new('L', new_image.size, color=0)
#new_image.putalpha(mask)
# For white
new_image.paste((255, 255, 255, 255))
new_image.paste(image, (left, top))
return new_image