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use a box from draft in thumbnail

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Alexander 2019-11-24 05:24:00 +03:00
parent 4126f6cdf7
commit 375556ffb5
2 changed files with 17 additions and 3 deletions
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13
Tests/test_image_thumbnail.py
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@ -1,6 +1,6 @@
from PIL import Image
from .helper import PillowTestCase, hopper
from .helper import PillowTestCase, hopper, fromstring, tostring
class TestImageThumbnail(PillowTestCase):
@ -47,3 +47,14 @@ class TestImageThumbnail(PillowTestCase):
im = Image.open("Tests/images/hopper.jpg")
im.thumbnail((64, 64))
self.assert_image(im, im.mode, (64, 64))
def test_DCT_scaling_edges(self):
# Make an image with red borders with size (N * 8) + 1 to cross DCT grid
im = Image.new('RGB', (97, 97), 'red')
im.paste(Image.new('RGB', (95, 95)), (1, 1))
thumb = fromstring(tostring(im, "JPEG", quality=95))
thumb.thumbnail((24, 24), Image.BICUBIC)
ref = im.resize((24, 24), Image.BICUBIC)
self.assert_image_similar(thumb, ref, 2)

7
src/PIL/Image.py
View File

@ -2212,14 +2212,17 @@ class Image(object):
x = int(max(x * size[1] / y, 1))
y = int(size[1])
size = x, y
box = None
if size == self.size:
return
self.draft(None, size)
res = self.draft(None, size)
if res is not None:
box = res[1]
if self.size != size:
im = self.resize(size, resample)
im = self.resize(size, resample, box=box)
self.im = im.im
self._size = size