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99 lines
3.3 KiB
Python
99 lines
3.3 KiB
Python
from PIL import Image, ImageSequence, TiffImagePlugin
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from .helper import PillowTestCase, assert_image_equal, hopper
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class TestImageSequence(PillowTestCase):
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def test_sanity(self):
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test_file = self.tempfile("temp.im")
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im = hopper("RGB")
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im.save(test_file)
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seq = ImageSequence.Iterator(im)
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index = 0
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for frame in seq:
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assert_image_equal(im, frame)
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self.assertEqual(im.tell(), index)
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index += 1
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self.assertEqual(index, 1)
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self.assertRaises(AttributeError, ImageSequence.Iterator, 0)
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def test_iterator(self):
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with Image.open("Tests/images/multipage.tiff") as im:
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i = ImageSequence.Iterator(im)
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for index in range(0, im.n_frames):
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self.assertEqual(i[index], next(i))
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self.assertRaises(IndexError, lambda: i[index + 1])
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self.assertRaises(StopIteration, next, i)
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def test_iterator_min_frame(self):
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with Image.open("Tests/images/hopper.psd") as im:
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i = ImageSequence.Iterator(im)
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for index in range(1, im.n_frames):
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self.assertEqual(i[index], next(i))
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def _test_multipage_tiff(self):
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with Image.open("Tests/images/multipage.tiff") as im:
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for index, frame in enumerate(ImageSequence.Iterator(im)):
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frame.load()
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self.assertEqual(index, im.tell())
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frame.convert("RGB")
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def test_tiff(self):
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self._test_multipage_tiff()
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def test_libtiff(self):
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codecs = dir(Image.core)
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if "libtiff_encoder" not in codecs or "libtiff_decoder" not in codecs:
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self.skipTest("tiff support not available")
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TiffImagePlugin.READ_LIBTIFF = True
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self._test_multipage_tiff()
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TiffImagePlugin.READ_LIBTIFF = False
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def test_consecutive(self):
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with Image.open("Tests/images/multipage.tiff") as im:
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firstFrame = None
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for frame in ImageSequence.Iterator(im):
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if firstFrame is None:
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firstFrame = frame.copy()
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for frame in ImageSequence.Iterator(im):
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assert_image_equal(frame, firstFrame)
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break
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def test_palette_mmap(self):
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# Using mmap in ImageFile can require to reload the palette.
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with Image.open("Tests/images/multipage-mmap.tiff") as im:
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color1 = im.getpalette()[0:3]
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im.seek(0)
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color2 = im.getpalette()[0:3]
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self.assertEqual(color1, color2)
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def test_all_frames(self):
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# Test a single image
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with Image.open("Tests/images/iss634.gif") as im:
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ims = ImageSequence.all_frames(im)
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self.assertEqual(len(ims), 42)
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for i, im_frame in enumerate(ims):
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self.assertFalse(im_frame is im)
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im.seek(i)
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assert_image_equal(im, im_frame)
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# Test a series of images
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ims = ImageSequence.all_frames([im, hopper(), im])
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self.assertEqual(len(ims), 85)
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# Test an operation
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ims = ImageSequence.all_frames(im, lambda im_frame: im_frame.rotate(90))
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for i, im_frame in enumerate(ims):
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im.seek(i)
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assert_image_equal(im.rotate(90), im_frame)
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