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110 lines
3.1 KiB
Python
110 lines
3.1 KiB
Python
from .helper import PillowTestCase, hopper
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from PIL import Image
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class TestModeI16(PillowTestCase):
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original = hopper().resize((32, 32)).convert('I')
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def verify(self, im1):
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im2 = self.original.copy()
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self.assertEqual(im1.size, im2.size)
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pix1 = im1.load()
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pix2 = im2.load()
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for y in range(im1.size[1]):
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for x in range(im1.size[0]):
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xy = x, y
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p1 = pix1[xy]
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p2 = pix2[xy]
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if im1.mode[0] != "I" and im2.mode[0] == "I":
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p2 //= 256
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self.assertEqual(
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p1, p2,
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("got %r from mode %s at %s, expected %r" %
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(p1, im1.mode, xy, p2)))
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def test_basic(self):
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# PIL 1.1 has limited support for 16-bit image data. Check that
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# create/copy/transform and save works as expected.
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def basic(mode):
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imIn = self.original.convert(mode)
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self.verify(imIn)
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w, h = imIn.size
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imOut = imIn.copy()
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self.verify(imOut) # copy
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imOut = imIn.transform((w, h), Image.EXTENT, (0, 0, w, h))
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self.verify(imOut) # transform
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filename = self.tempfile("temp.im")
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imIn.save(filename)
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imOut = Image.open(filename)
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self.verify(imIn)
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self.verify(imOut)
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imOut = imIn.crop((0, 0, w, h))
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self.verify(imOut)
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imOut = Image.new(mode, (w, h), None)
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imOut.paste(imIn.crop((0, 0, w//2, h)), (0, 0))
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imOut.paste(imIn.crop((w//2, 0, w, h)), (w//2, 0))
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self.verify(imIn)
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self.verify(imOut)
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imIn = Image.new(mode, (1, 1), 1)
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self.assertEqual(imIn.getpixel((0, 0)), 1)
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imIn.putpixel((0, 0), 2)
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self.assertEqual(imIn.getpixel((0, 0)), 2)
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if mode == "L":
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maximum = 255
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else:
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maximum = 32767
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imIn = Image.new(mode, (1, 1), 256)
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self.assertEqual(imIn.getpixel((0, 0)), min(256, maximum))
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imIn.putpixel((0, 0), 512)
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self.assertEqual(imIn.getpixel((0, 0)), min(512, maximum))
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basic("L")
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basic("I;16")
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basic("I;16B")
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basic("I;16L")
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basic("I")
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def test_tobytes(self):
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def tobytes(mode):
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return Image.new(mode, (1, 1), 1).tobytes()
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order = 1 if Image._ENDIAN == '<' else -1
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self.assertEqual(tobytes("L"), b"\x01")
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self.assertEqual(tobytes("I;16"), b"\x01\x00")
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self.assertEqual(tobytes("I;16B"), b"\x00\x01")
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self.assertEqual(tobytes("I"), b"\x01\x00\x00\x00"[::order])
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def test_convert(self):
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im = self.original.copy()
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self.verify(im.convert("I;16"))
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self.verify(im.convert("I;16").convert("L"))
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self.verify(im.convert("I;16").convert("I"))
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self.verify(im.convert("I;16B"))
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self.verify(im.convert("I;16B").convert("L"))
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self.verify(im.convert("I;16B").convert("I"))
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