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Fix thumbnails 

Fixes #97
This commit is contained in:
rubenwardy 2018-07-28 16:03:48 +01:00
parent e82166f87e
commit c298f64295
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1 changed files with 29 additions and 4 deletions
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33
app/views/thumbnails.py
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@ -18,7 +18,7 @@
from flask import *
from app import app
import glob, os
import os
from PIL import Image
ALLOWED_RESOLUTIONS=[(350,233)]
@ -29,6 +29,33 @@ def mkdir(path):
mkdir("app/public/thumbnails/")
def resize_and_crop(img_path, modified_path, size):
img = Image.open(img_path)
# Get current and desired ratio for the images
img_ratio = img.size[0] / float(img.size[1])
ratio = size[0] / float(size[1])
# Is more portrait than target, scale and crop
if ratio > img_ratio:
img = img.resize((int(size[0]), int(size[0] * img.size[1] / img.size[0])),
Image.BICUBIC)
box = (0, (img.size[1] - size[1]) / 2, img.size[0], (img.size[1] + size[1]) / 2)
img = img.crop(box)
# Is more landscape than target, scale and crop
elif ratio < img_ratio:
img = img.resize((int(size[1] * img.size[0] / img.size[1]), int(size[1])),
Image.BICUBIC)
box = ((img.size[0] - size[0]) / 2, 0, (img.size[0] + size[0]) / 2, img.size[1])
img = img.crop(box)
# Is exactly the same ratio as target
else:
img = img.resize(size, Image.BICUBIC)
img.save(modified_path)
@app.route("/thumbnails/<img>")
@app.route("/thumbnails/<int:w>x<int:h>/<img>")
def make_thumbnail(img, w=350, h=233):
@ -40,7 +67,5 @@ def make_thumbnail(img, w=350, h=233):
cache_filepath = "public/thumbnails/{}x{}/{}".format(w, h, img)
source_filepath = "public/uploads/" + img
im = Image.open("app/" + source_filepath)
im.thumbnail((w, h), Image.ANTIALIAS)
im.save("app/" + cache_filepath, optimize=True)
resize_and_crop("app/" + source_filepath, "app/" + cache_filepath, (w, h))
return send_file(cache_filepath)