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88 lines
2.1 KiB
Python
88 lines
2.1 KiB
Python
from tester import *
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from PIL import Image
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codecs = dir(Image.core)
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if "gif_encoder" not in codecs or "gif_decoder" not in codecs:
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skip("gif support not available") # can this happen?
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# sample gif stream
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file = "Images/lena.gif"
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with open(file, "rb") as f:
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data = f.read()
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def test_sanity():
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im = Image.open(file)
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im.load()
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assert_equal(im.mode, "P")
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assert_equal(im.size, (128, 128))
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assert_equal(im.format, "GIF")
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def test_optimize():
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def test(optimize):
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im = Image.new("L", (1, 1), 0)
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file = BytesIO()
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im.save(file, "GIF", optimize=optimize)
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return len(file.getvalue())
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assert_equal(test(0), 800)
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assert_equal(test(1), 38)
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def test_roundtrip():
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out = tempfile('temp.gif')
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im = lena()
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im.save(out)
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reread = Image.open(out)
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assert_image_similar(reread.convert('RGB'), im, 50)
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def test_roundtrip2():
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#see https://github.com/python-imaging/Pillow/issues/403
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out = tempfile('temp.gif')
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im = Image.open('Images/lena.gif')
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im2 = im.copy()
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im2.save(out)
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reread = Image.open(out)
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assert_image_similar(reread.convert('RGB'), lena(), 50)
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def test_palette_handling():
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# see https://github.com/python-imaging/Pillow/issues/513
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im = Image.open('Images/lena.gif')
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im = im.convert('RGB')
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im = im.resize((100,100), Image.ANTIALIAS)
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im2 = im.convert('P', palette=Image.ADAPTIVE, colors=256)
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f = tempfile('temp.gif')
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im2.save(f, optimize=True)
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reloaded = Image.open(f)
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assert_image_similar(im, reloaded.convert('RGB'), 10)
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def test_palette_434():
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# see https://github.com/python-imaging/Pillow/issues/434
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def roundtrip(im, *args, **kwargs):
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out = tempfile('temp.gif')
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im.save(out, *args, **kwargs)
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reloaded = Image.open(out)
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return [im, reloaded]
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orig = "Tests/images/test.colors.gif"
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im = Image.open(orig)
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assert_image_equal(*roundtrip(im))
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assert_image_equal(*roundtrip(im, optimize=True))
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im = im.convert("RGB")
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# check automatic P conversion
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reloaded = roundtrip(im)[1].convert('RGB')
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assert_image_equal(im, reloaded)
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