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add tests and docs

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This commit is contained in:
Herb 2014-11-08 14:49:50 +08:00
parent b38c8e0df2
commit 79c7c7a01a
3 changed files with 27 additions and 8 deletions
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12
PIL/IcoImagePlugin.py
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@ -25,10 +25,7 @@
__version__ = "0.1" __version__ = "0.1"
import struct import struct
try: from io import BytesIO
from io import BytesIO
except ImportError:
from cStringIO import StringIO as BytesIO
from PIL import Image, ImageFile, BmpImagePlugin, PngImagePlugin, _binary from PIL import Image, ImageFile, BmpImagePlugin, PngImagePlugin, _binary
from math import log, ceil from math import log, ceil
@ -51,7 +48,7 @@ def _save(im, fp, filename):
width, height = im.size width, height = im.size
filter(lambda x: False if (x[0] > width or x[1] > height or filter(lambda x: False if (x[0] > width or x[1] > height or
x[0] > 255 or x[1] > 255) else True, sizes) x[0] > 255 or x[1] > 255) else True, sizes)
sizes = sorted(sizes, key=lambda x: x[0], reverse=True) sizes = sorted(sizes, key=lambda x: x[0])
fp.write(struct.pack("H", len(sizes))) # idCount(2) fp.write(struct.pack("H", len(sizes))) # idCount(2)
offset = fp.tell() + len(sizes)*16 offset = fp.tell() + len(sizes)*16
for size in sizes: for size in sizes:
@ -64,8 +61,9 @@ def _save(im, fp, filename):
fp.write(struct.pack("H", 32)) # wBitCount(2) fp.write(struct.pack("H", 32)) # wBitCount(2)
image_io = BytesIO() image_io = BytesIO()
im.thumbnail(size, Image.ANTIALIAS) tmp = im.copy()
im.save(image_io, "png") tmp.thumbnail(size, Image.ANTIALIAS)
tmp.save(image_io, "png")
image_io.seek(0) image_io.seek(0)
image_bytes = image_io.read() image_bytes = image_io.read()
bytes_len = len(image_bytes) bytes_len = len(image_bytes)

15
Tests/test_file_ico.py
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@ -1,5 +1,6 @@
from helper import unittest, PillowTestCase from helper import unittest, PillowTestCase, hopper
import io
from PIL import Image from PIL import Image
# sample ppm stream # sample ppm stream
@ -16,6 +17,18 @@ class TestFileIco(PillowTestCase):
self.assertEqual(im.size, (16, 16)) self.assertEqual(im.size, (16, 16))
self.assertEqual(im.format, "ICO") self.assertEqual(im.format, "ICO")
def test_save_to_bytes(self):
output = io.BytesIO()
im = hopper()
im.save(output, "ico", sizes=[(32, 32), (64, 64)])
output.seek(0)
reloaded = Image.open(output)
self.assertEqual(im.mode, reloaded.mode)
self.assertEqual((64, 64), reloaded.size)
self.assertEqual(reloaded.format, "ICO")
if __name__ == '__main__': if __name__ == '__main__':
unittest.main() unittest.main()

8
docs/handbook/image-file-formats.rst
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@ -589,6 +589,14 @@ ICO
ICO is used to store icons on Windows. The largest available icon is read. ICO is used to store icons on Windows. The largest available icon is read.
The :py:meth:`~PIL.Image.Image.save` method supports the following options:
**sizes**
A list of sizes including in this ico file; these are a 2-tuple,
``(width, height)``; Default to ``[(16, 16), (24, 24), (32, 32), (48, 48),
(64, 64), (128, 128), (255, 255)]``. Any size is bigger then the original
size or 255 will be ignored.
ICNS ICNS
^^^^ ^^^^