mirror of
https://github.com/python-pillow/Pillow.git
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337 lines
10 KiB
Python
337 lines
10 KiB
Python
from io import BytesIO
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import pytest
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from PIL import EpsImagePlugin, Image, ImageFile, features
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from .helper import (
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assert_image,
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assert_image_equal,
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assert_image_similar,
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fromstring,
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hopper,
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skip_unless_feature,
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tostring,
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)
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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:
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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), Image.NEAREST)
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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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assert_image_equal(*roundtrip("BMP"))
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im1, im2 = roundtrip("GIF")
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assert_image_similar(im1.convert("P"), im2, 1)
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assert_image_equal(*roundtrip("IM"))
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assert_image_equal(*roundtrip("MSP"))
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if features.check("zlib"):
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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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assert_image_equal(*roundtrip("PNG"))
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finally:
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ImageFile.MAXBLOCK = MAXBLOCK
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assert_image_equal(*roundtrip("PPM"))
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assert_image_equal(*roundtrip("TIFF"))
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assert_image_equal(*roundtrip("XBM"))
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assert_image_equal(*roundtrip("TGA"))
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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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assert_image_similar(im1, im2.convert("L"), 20)
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if features.check("jpg"):
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im1, im2 = roundtrip("JPEG") # lossy compression
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assert_image(im1, im2.mode, im2.size)
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with pytest.raises(OSError):
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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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assert (48, 48) == p.image.size
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@skip_unless_feature("zlib")
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def test_safeblock(self):
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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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assert_image_equal(im1, im2)
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def test_raise_ioerror(self):
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with pytest.raises(IOError):
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with pytest.warns(DeprecationWarning) as record:
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ImageFile.raise_ioerror(1)
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assert len(record) == 1
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def test_raise_oserror(self):
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with pytest.raises(OSError):
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ImageFile.raise_oserror(1)
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def test_raise_typeerror(self):
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with pytest.raises(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 pytest.raises(OSError):
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p.close()
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@skip_unless_feature("zlib")
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def test_truncated_with_errors(self):
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with Image.open("Tests/images/truncated_image.png") as im:
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with pytest.raises(OSError):
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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 pytest.raises(OSError):
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im.load()
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@skip_unless_feature("zlib")
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def test_truncated_without_errors(self):
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with Image.open("Tests/images/truncated_image.png") as im:
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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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@skip_unless_feature("zlib")
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def test_broken_datastream_with_errors(self):
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with Image.open("Tests/images/broken_data_stream.png") as im:
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with pytest.raises(OSError):
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im.load()
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@skip_unless_feature("zlib")
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def test_broken_datastream_without_errors(self):
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with Image.open("Tests/images/broken_data_stream.png") as im:
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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:
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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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assert d.state.xoff == xoff
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assert d.state.yoff == yoff
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assert d.state.xsize == xsize
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assert d.state.ysize == ysize
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with pytest.raises(ValueError):
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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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assert d.state.xoff == 0
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assert d.state.yoff == 0
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assert d.state.xsize == 200
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assert 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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with pytest.raises(ValueError):
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im.load()
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im.tile = [("MOCK", (xoff, yoff, xoff + xsize, -10), 32, None)]
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with pytest.raises(ValueError):
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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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with pytest.raises(ValueError):
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im.load()
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im.tile = [("MOCK", (xoff, yoff, xoff + xsize, yoff + ysize + 100), 32, None)]
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with pytest.raises(ValueError):
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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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assert im.format is None
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assert im.get_format_mimetype() is None
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def test_exif_jpeg(self, tmp_path):
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with Image.open("Tests/images/exif-72dpi-int.jpg") as im: # Little endian
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exif = im.getexif()
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assert 258 not in exif
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assert 40960 in exif
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assert exif[40963] == 450
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assert exif[11] == "gThumb 3.0.1"
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out = str(tmp_path / "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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assert reloaded_exif[258] == 8
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assert 40960 not in exif
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assert reloaded_exif[40963] == 455
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assert exif[11] == "Pillow test"
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with Image.open("Tests/images/no-dpi-in-exif.jpg") as im: # Big endian
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exif = im.getexif()
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assert 258 not in exif
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assert 40962 in exif
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assert exif[40963] == 200
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assert exif[305] == "Adobe Photoshop CC 2017 (Macintosh)"
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out = str(tmp_path / "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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assert reloaded_exif[258] == 8
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assert 40960 not in exif
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assert reloaded_exif[40963] == 455
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assert exif[305] == "Pillow test"
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@skip_unless_feature("webp")
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@skip_unless_feature("webp_anim")
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def test_exif_webp(self, tmp_path):
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with Image.open("Tests/images/hopper.webp") as im:
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exif = im.getexif()
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assert exif == {}
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out = str(tmp_path / "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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assert reloaded_exif[258] == 8
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assert reloaded_exif[40963] == 455
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assert 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, tmp_path):
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with Image.open("Tests/images/exif.png") as im:
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exif = im.getexif()
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assert exif == {274: 1}
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out = str(tmp_path / "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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assert 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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assert exif.get_ifd(0xA005) == {
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1: "R98",
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2: b"0100",
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4097: 2272,
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4098: 1704,
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}
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