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https://github.com/python-pillow/Pillow.git
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33dabf986f
The unittest in helper.py has not offered an interesting abstraction
since dbe9f85c7d so import from the more
typical stdlib location.
337 lines
10 KiB
Python
337 lines
10 KiB
Python
import unittest
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from io import BytesIO
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from PIL import EpsImagePlugin, Image, ImageFile
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from .helper import PillowTestCase, fromstring, hopper, tostring
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try:
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from PIL import _webp
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HAVE_WEBP = True
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except ImportError:
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HAVE_WEBP = False
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codecs = dir(Image.core)
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# save original block sizes
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MAXBLOCK = ImageFile.MAXBLOCK
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SAFEBLOCK = ImageFile.SAFEBLOCK
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class TestImageFile(PillowTestCase):
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def test_parser(self):
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def roundtrip(format):
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im = hopper("L").resize((1000, 1000))
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if format in ("MSP", "XBM"):
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im = im.convert("1")
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test_file = BytesIO()
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im.copy().save(test_file, format)
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data = test_file.getvalue()
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parser = ImageFile.Parser()
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parser.feed(data)
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imOut = parser.close()
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return im, imOut
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self.assert_image_equal(*roundtrip("BMP"))
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im1, im2 = roundtrip("GIF")
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self.assert_image_similar(im1.convert("P"), im2, 1)
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self.assert_image_equal(*roundtrip("IM"))
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self.assert_image_equal(*roundtrip("MSP"))
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if "zip_encoder" in codecs:
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try:
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# force multiple blocks in PNG driver
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ImageFile.MAXBLOCK = 8192
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self.assert_image_equal(*roundtrip("PNG"))
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finally:
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ImageFile.MAXBLOCK = MAXBLOCK
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self.assert_image_equal(*roundtrip("PPM"))
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self.assert_image_equal(*roundtrip("TIFF"))
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self.assert_image_equal(*roundtrip("XBM"))
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self.assert_image_equal(*roundtrip("TGA"))
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self.assert_image_equal(*roundtrip("PCX"))
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if EpsImagePlugin.has_ghostscript():
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im1, im2 = roundtrip("EPS")
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# This test fails on Ubuntu 12.04, PPC (Bigendian) It
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# appears to be a ghostscript 9.05 bug, since the
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# ghostscript rendering is wonky and the file is identical
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# to that written on ubuntu 12.04 x64
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# md5sum: ba974835ff2d6f3f2fd0053a23521d4a
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# EPS comes back in RGB:
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self.assert_image_similar(im1, im2.convert("L"), 20)
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if "jpeg_encoder" in codecs:
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im1, im2 = roundtrip("JPEG") # lossy compression
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self.assert_image(im1, im2.mode, im2.size)
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self.assertRaises(IOError, roundtrip, "PDF")
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def test_ico(self):
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with open("Tests/images/python.ico", "rb") as f:
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data = f.read()
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with ImageFile.Parser() as p:
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p.feed(data)
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self.assertEqual((48, 48), p.image.size)
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def test_safeblock(self):
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if "zip_encoder" not in codecs:
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self.skipTest("PNG (zlib) encoder not available")
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im1 = hopper()
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try:
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ImageFile.SAFEBLOCK = 1
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im2 = fromstring(tostring(im1, "PNG"))
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finally:
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ImageFile.SAFEBLOCK = SAFEBLOCK
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self.assert_image_equal(im1, im2)
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def test_raise_ioerror(self):
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self.assertRaises(IOError, ImageFile.raise_ioerror, 1)
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def test_raise_typeerror(self):
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with self.assertRaises(TypeError):
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parser = ImageFile.Parser()
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parser.feed(1)
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def test_negative_stride(self):
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with open("Tests/images/raw_negative_stride.bin", "rb") as f:
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input = f.read()
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p = ImageFile.Parser()
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p.feed(input)
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with self.assertRaises(IOError):
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p.close()
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def test_truncated_with_errors(self):
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if "zip_encoder" not in codecs:
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self.skipTest("PNG (zlib) encoder not available")
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with Image.open("Tests/images/truncated_image.png") as im:
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with self.assertRaises(IOError):
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im.load()
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# Test that the error is raised if loaded a second time
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with self.assertRaises(IOError):
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im.load()
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def test_truncated_without_errors(self):
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if "zip_encoder" not in codecs:
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self.skipTest("PNG (zlib) encoder not available")
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im = Image.open("Tests/images/truncated_image.png")
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ImageFile.LOAD_TRUNCATED_IMAGES = True
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try:
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im.load()
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finally:
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ImageFile.LOAD_TRUNCATED_IMAGES = False
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def test_broken_datastream_with_errors(self):
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if "zip_encoder" not in codecs:
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self.skipTest("PNG (zlib) encoder not available")
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im = Image.open("Tests/images/broken_data_stream.png")
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with self.assertRaises(IOError):
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im.load()
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def test_broken_datastream_without_errors(self):
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if "zip_encoder" not in codecs:
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self.skipTest("PNG (zlib) encoder not available")
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im = Image.open("Tests/images/broken_data_stream.png")
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ImageFile.LOAD_TRUNCATED_IMAGES = True
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try:
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im.load()
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finally:
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ImageFile.LOAD_TRUNCATED_IMAGES = False
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class MockPyDecoder(ImageFile.PyDecoder):
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def decode(self, buffer):
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# eof
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return -1, 0
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xoff, yoff, xsize, ysize = 10, 20, 100, 100
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class MockImageFile(ImageFile.ImageFile):
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def _open(self):
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self.rawmode = "RGBA"
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self.mode = "RGBA"
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self._size = (200, 200)
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self.tile = [("MOCK", (xoff, yoff, xoff + xsize, yoff + ysize), 32, None)]
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class TestPyDecoder(PillowTestCase):
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def get_decoder(self):
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decoder = MockPyDecoder(None)
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def closure(mode, *args):
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decoder.__init__(mode, *args)
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return decoder
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Image.register_decoder("MOCK", closure)
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return decoder
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def test_setimage(self):
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buf = BytesIO(b"\x00" * 255)
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im = MockImageFile(buf)
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d = self.get_decoder()
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im.load()
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self.assertEqual(d.state.xoff, xoff)
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self.assertEqual(d.state.yoff, yoff)
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self.assertEqual(d.state.xsize, xsize)
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self.assertEqual(d.state.ysize, ysize)
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self.assertRaises(ValueError, d.set_as_raw, b"\x00")
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def test_extents_none(self):
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buf = BytesIO(b"\x00" * 255)
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im = MockImageFile(buf)
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im.tile = [("MOCK", None, 32, None)]
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d = self.get_decoder()
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im.load()
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self.assertEqual(d.state.xoff, 0)
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self.assertEqual(d.state.yoff, 0)
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self.assertEqual(d.state.xsize, 200)
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self.assertEqual(d.state.ysize, 200)
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def test_negsize(self):
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buf = BytesIO(b"\x00" * 255)
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im = MockImageFile(buf)
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im.tile = [("MOCK", (xoff, yoff, -10, yoff + ysize), 32, None)]
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self.get_decoder()
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self.assertRaises(ValueError, im.load)
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im.tile = [("MOCK", (xoff, yoff, xoff + xsize, -10), 32, None)]
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self.assertRaises(ValueError, im.load)
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def test_oversize(self):
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buf = BytesIO(b"\x00" * 255)
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im = MockImageFile(buf)
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im.tile = [("MOCK", (xoff, yoff, xoff + xsize + 100, yoff + ysize), 32, None)]
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self.get_decoder()
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self.assertRaises(ValueError, im.load)
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im.tile = [("MOCK", (xoff, yoff, xoff + xsize, yoff + ysize + 100), 32, None)]
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self.assertRaises(ValueError, im.load)
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def test_no_format(self):
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buf = BytesIO(b"\x00" * 255)
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im = MockImageFile(buf)
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self.assertIsNone(im.format)
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self.assertIsNone(im.get_format_mimetype())
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def test_exif_jpeg(self):
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im = Image.open("Tests/images/exif-72dpi-int.jpg") # Little endian
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exif = im.getexif()
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self.assertNotIn(258, exif)
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self.assertIn(40960, exif)
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self.assertEqual(exif[40963], 450)
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self.assertEqual(exif[11], "gThumb 3.0.1")
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out = self.tempfile("temp.jpg")
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exif[258] = 8
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del exif[40960]
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exif[40963] = 455
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exif[11] = "Pillow test"
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im.save(out, exif=exif)
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with Image.open(out) as reloaded:
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reloaded_exif = reloaded.getexif()
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self.assertEqual(reloaded_exif[258], 8)
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self.assertNotIn(40960, exif)
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self.assertEqual(reloaded_exif[40963], 455)
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self.assertEqual(exif[11], "Pillow test")
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im = Image.open("Tests/images/no-dpi-in-exif.jpg") # Big endian
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exif = im.getexif()
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self.assertNotIn(258, exif)
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self.assertIn(40962, exif)
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self.assertEqual(exif[40963], 200)
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self.assertEqual(exif[305], "Adobe Photoshop CC 2017 (Macintosh)")
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out = self.tempfile("temp.jpg")
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exif[258] = 8
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del exif[34665]
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exif[40963] = 455
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exif[305] = "Pillow test"
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im.save(out, exif=exif)
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with Image.open(out) as reloaded:
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reloaded_exif = reloaded.getexif()
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self.assertEqual(reloaded_exif[258], 8)
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self.assertNotIn(40960, exif)
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self.assertEqual(reloaded_exif[40963], 455)
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self.assertEqual(exif[305], "Pillow test")
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@unittest.skipIf(
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not HAVE_WEBP or not _webp.HAVE_WEBPANIM,
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"WebP support not installed with animation",
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)
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def test_exif_webp(self):
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im = Image.open("Tests/images/hopper.webp")
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exif = im.getexif()
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self.assertEqual(exif, {})
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out = self.tempfile("temp.webp")
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exif[258] = 8
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exif[40963] = 455
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exif[305] = "Pillow test"
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def check_exif():
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with Image.open(out) as reloaded:
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reloaded_exif = reloaded.getexif()
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self.assertEqual(reloaded_exif[258], 8)
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self.assertEqual(reloaded_exif[40963], 455)
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self.assertEqual(exif[305], "Pillow test")
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im.save(out, exif=exif)
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check_exif()
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im.save(out, exif=exif, save_all=True)
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check_exif()
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def test_exif_png(self):
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im = Image.open("Tests/images/exif.png")
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exif = im.getexif()
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self.assertEqual(exif, {274: 1})
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out = self.tempfile("temp.png")
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exif[258] = 8
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del exif[274]
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exif[40963] = 455
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exif[305] = "Pillow test"
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im.save(out, exif=exif)
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with Image.open(out) as reloaded:
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reloaded_exif = reloaded.getexif()
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self.assertEqual(reloaded_exif, {258: 8, 40963: 455, 305: "Pillow test"})
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def test_exif_interop(self):
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with Image.open("Tests/images/flower.jpg") as im:
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exif = im.getexif()
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self.assertEqual(
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exif.get_ifd(0xA005), {1: "R98", 2: b"0100", 4097: 2272, 4098: 1704}
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)
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