from .helper import PillowTestCase, hopper from PIL import Image, ImageSequence, TiffImagePlugin class TestImageSequence(PillowTestCase): def test_sanity(self): test_file = self.tempfile("temp.im") im = hopper("RGB") im.save(test_file) seq = ImageSequence.Iterator(im) index = 0 for frame in seq: self.assert_image_equal(im, frame) self.assertEqual(im.tell(), index) index += 1 self.assertEqual(index, 1) self.assertRaises(AttributeError, ImageSequence.Iterator, 0) def test_iterator(self): im = Image.open('Tests/images/multipage.tiff') i = ImageSequence.Iterator(im) for index in range(0, im.n_frames): self.assertEqual(i[index], next(i)) self.assertRaises(IndexError, lambda: i[index+1]) self.assertRaises(StopIteration, next, i) def _test_multipage_tiff(self): im = Image.open('Tests/images/multipage.tiff') for index, frame in enumerate(ImageSequence.Iterator(im)): frame.load() self.assertEqual(index, im.tell()) frame.convert('RGB') def test_tiff(self): self._test_multipage_tiff() def test_libtiff(self): codecs = dir(Image.core) if "libtiff_encoder" not in codecs or "libtiff_decoder" not in codecs: self.skipTest("tiff support not available") TiffImagePlugin.READ_LIBTIFF = True self._test_multipage_tiff() TiffImagePlugin.READ_LIBTIFF = False def test_consecutive(self): im = Image.open('Tests/images/multipage.tiff') firstFrame = None for frame in ImageSequence.Iterator(im): if firstFrame is None: firstFrame = frame.copy() for frame in ImageSequence.Iterator(im): self.assert_image_equal(frame, firstFrame) break def test_palette_mmap(self): # Using mmap in ImageFile can require to reload the palette. im = Image.open('Tests/images/multipage-mmap.tiff') color1 = im.getpalette()[0:3] im.seek(0) color2 = im.getpalette()[0:3] self.assertEqual(color1, color2)