mirror of
https://github.com/python-pillow/Pillow.git
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283 lines
7.6 KiB
Python
283 lines
7.6 KiB
Python
from __future__ import annotations
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import warnings
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from io import BytesIO
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import pytest
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from PIL import Image
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from .helper import (
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assert_image_equal,
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assert_image_similar,
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is_pypy,
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skip_unless_feature,
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)
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test_files = ["Tests/images/sugarshack.mpo", "Tests/images/frozenpond.mpo"]
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pytestmark = skip_unless_feature("jpg")
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def roundtrip(im, **options):
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out = BytesIO()
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im.save(out, "MPO", **options)
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test_bytes = out.tell()
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out.seek(0)
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im = Image.open(out)
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im.bytes = test_bytes # for testing only
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return im
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@pytest.mark.parametrize("test_file", test_files)
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def test_sanity(test_file):
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with Image.open(test_file) as im:
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im.load()
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assert im.mode == "RGB"
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assert im.size == (640, 480)
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assert im.format == "MPO"
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@pytest.mark.skipif(is_pypy(), reason="Requires CPython")
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def test_unclosed_file():
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def open():
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im = Image.open(test_files[0])
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im.load()
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with pytest.warns(ResourceWarning):
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open()
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def test_closed_file():
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with warnings.catch_warnings():
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im = Image.open(test_files[0])
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im.load()
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im.close()
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def test_seek_after_close():
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im = Image.open(test_files[0])
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im.close()
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with pytest.raises(ValueError):
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im.seek(1)
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def test_context_manager():
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with warnings.catch_warnings():
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with Image.open(test_files[0]) as im:
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im.load()
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@pytest.mark.parametrize("test_file", test_files)
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def test_app(test_file):
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# Test APP/COM reader (@PIL135)
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with Image.open(test_file) as im:
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assert im.applist[0][0] == "APP1"
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assert im.applist[1][0] == "APP2"
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assert (
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im.applist[1][1][:16] == b"MPF\x00MM\x00*\x00\x00\x00\x08\x00\x03\xb0\x00"
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)
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assert len(im.applist) == 2
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@pytest.mark.parametrize("test_file", test_files)
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def test_exif(test_file):
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with Image.open(test_file) as im_original:
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im_reloaded = roundtrip(im_original, save_all=True, exif=im_original.getexif())
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for im in (im_original, im_reloaded):
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info = im._getexif()
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assert info[272] == "Nintendo 3DS"
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assert info[296] == 2
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assert info[34665] == 188
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def test_frame_size():
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# This image has been hexedited to contain a different size
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# in the EXIF data of the second frame
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with Image.open("Tests/images/sugarshack_frame_size.mpo") as im:
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assert im.size == (640, 480)
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im.seek(1)
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assert im.size == (680, 480)
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im.seek(0)
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assert im.size == (640, 480)
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def test_ignore_frame_size():
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# Ignore the different size of the second frame
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# since this is not a "Large Thumbnail" image
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with Image.open("Tests/images/ignore_frame_size.mpo") as im:
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assert im.size == (64, 64)
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im.seek(1)
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assert (
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im.mpinfo[0xB002][1]["Attribute"]["MPType"]
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== "Multi-Frame Image: (Disparity)"
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)
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assert im.size == (64, 64)
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def test_parallax():
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# Nintendo
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with Image.open("Tests/images/sugarshack.mpo") as im:
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exif = im.getexif()
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assert exif.get_ifd(0x927C)[0x1101]["Parallax"] == -44.798187255859375
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# Fujifilm
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with Image.open("Tests/images/fujifilm.mpo") as im:
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im.seek(1)
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exif = im.getexif()
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assert exif.get_ifd(0x927C)[0xB211] == -3.125
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def test_reload_exif_after_seek():
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with Image.open("Tests/images/sugarshack.mpo") as im:
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exif = im.getexif()
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del exif[296]
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im.seek(1)
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assert 296 in exif
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@pytest.mark.parametrize("test_file", test_files)
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def test_mp(test_file):
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with Image.open(test_file) as im:
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mpinfo = im._getmp()
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assert mpinfo[45056] == b"0100"
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assert mpinfo[45057] == 2
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def test_mp_offset():
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# This image has been manually hexedited to have an IFD offset of 10
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# in APP2 data, in contrast to normal 8
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with Image.open("Tests/images/sugarshack_ifd_offset.mpo") as im:
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mpinfo = im._getmp()
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assert mpinfo[45056] == b"0100"
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assert mpinfo[45057] == 2
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def test_mp_no_data():
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# This image has been manually hexedited to have the second frame
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# beyond the end of the file
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with Image.open("Tests/images/sugarshack_no_data.mpo") as im:
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with pytest.raises(ValueError):
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im.seek(1)
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@pytest.mark.parametrize("test_file", test_files)
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def test_mp_attribute(test_file):
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with Image.open(test_file) as im:
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mpinfo = im._getmp()
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for frame_number, mpentry in enumerate(mpinfo[0xB002]):
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mpattr = mpentry["Attribute"]
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if frame_number:
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assert not mpattr["RepresentativeImageFlag"]
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else:
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assert mpattr["RepresentativeImageFlag"]
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assert not mpattr["DependentParentImageFlag"]
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assert not mpattr["DependentChildImageFlag"]
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assert mpattr["ImageDataFormat"] == "JPEG"
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assert mpattr["MPType"] == "Multi-Frame Image: (Disparity)"
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assert mpattr["Reserved"] == 0
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@pytest.mark.parametrize("test_file", test_files)
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def test_seek(test_file):
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with Image.open(test_file) as im:
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assert im.tell() == 0
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# prior to first image raises an error, both blatant and borderline
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with pytest.raises(EOFError):
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im.seek(-1)
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with pytest.raises(EOFError):
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im.seek(-523)
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# after the final image raises an error,
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# both blatant and borderline
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with pytest.raises(EOFError):
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im.seek(2)
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with pytest.raises(EOFError):
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im.seek(523)
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# bad calls shouldn't change the frame
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assert im.tell() == 0
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# this one will work
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im.seek(1)
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assert im.tell() == 1
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# and this one, too
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im.seek(0)
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assert im.tell() == 0
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def test_n_frames():
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with Image.open("Tests/images/sugarshack.mpo") as im:
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assert im.n_frames == 2
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assert im.is_animated
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def test_eoferror():
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with Image.open("Tests/images/sugarshack.mpo") as im:
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n_frames = im.n_frames
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# Test seeking past the last frame
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with pytest.raises(EOFError):
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im.seek(n_frames)
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assert im.tell() < n_frames
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# Test that seeking to the last frame does not raise an error
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im.seek(n_frames - 1)
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@pytest.mark.parametrize("test_file", test_files)
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def test_image_grab(test_file):
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with Image.open(test_file) as im:
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assert im.tell() == 0
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im0 = im.tobytes()
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im.seek(1)
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assert im.tell() == 1
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im1 = im.tobytes()
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im.seek(0)
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assert im.tell() == 0
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im02 = im.tobytes()
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assert im0 == im02
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assert im0 != im1
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@pytest.mark.parametrize("test_file", test_files)
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def test_save(test_file):
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with Image.open(test_file) as im:
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assert im.tell() == 0
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jpg0 = roundtrip(im)
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assert_image_similar(im, jpg0, 30)
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im.seek(1)
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assert im.tell() == 1
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jpg1 = roundtrip(im)
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assert_image_similar(im, jpg1, 30)
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def test_save_all():
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for test_file in test_files:
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with Image.open(test_file) as im:
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im_reloaded = roundtrip(im, save_all=True)
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im.seek(0)
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assert_image_similar(im, im_reloaded, 30)
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im.seek(1)
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im_reloaded.seek(1)
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assert_image_similar(im, im_reloaded, 30)
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im = Image.new("RGB", (1, 1))
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im2 = Image.new("RGB", (1, 1), "#f00")
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im_reloaded = roundtrip(im, save_all=True, append_images=[im2])
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assert_image_equal(im, im_reloaded)
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assert im_reloaded.mpinfo[45056] == b"0100"
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im_reloaded.seek(1)
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assert_image_similar(im2, im_reloaded, 1)
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# Test that a single frame image will not be saved as an MPO
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jpg = roundtrip(im, save_all=True)
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assert "mp" not in jpg.info
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