mirror of
https://github.com/python-pillow/Pillow.git
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110 lines
2.8 KiB
Python
110 lines
2.8 KiB
Python
from __future__ import annotations
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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_deep_equal,
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assert_image_equal,
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hopper,
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)
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TYPE_CHECKING = False
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if TYPE_CHECKING:
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import pyarrow
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else:
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pyarrow = pytest.importorskip("pyarrow", reason="PyArrow not installed")
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TEST_IMAGE_SIZE = (10, 10)
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# really hard to get a non-nullable list type
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fl_uint8_4_type = pyarrow.field(
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"_", pyarrow.list_(pyarrow.field("_", pyarrow.uint8()).with_nullable(False), 4)
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).type
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@pytest.mark.parametrize(
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"mode, dtype, mask",
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(
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("L", pyarrow.uint8(), None),
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("I", pyarrow.int32(), None),
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("F", pyarrow.float32(), None),
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("LA", fl_uint8_4_type, [0, 3]),
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("RGB", fl_uint8_4_type, [0, 1, 2]),
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("RGBA", fl_uint8_4_type, None),
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("RGBX", fl_uint8_4_type, None),
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("CMYK", fl_uint8_4_type, None),
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("YCbCr", fl_uint8_4_type, [0, 1, 2]),
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("HSV", fl_uint8_4_type, [0, 1, 2]),
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),
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)
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def test_to_array(mode: str, dtype: pyarrow.DataType, mask: list[int] | None) -> None:
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img = hopper(mode)
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# Resize to non-square
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img = img.crop((3, 0, 124, 127))
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assert img.size == (121, 127)
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arr = pyarrow.array(img) # type: ignore[call-overload]
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assert arr.type == dtype
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assert img.height * img.width == len(arr)
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px = img.load()
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assert px is not None
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for x in range(0, img.size[0], int(img.size[0] / 10)):
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for y in range(0, img.size[1], int(img.size[1] / 10)):
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if mask:
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for ix, elt in enumerate(mask):
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pixel = px[x, y]
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assert isinstance(pixel, tuple)
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assert pixel[ix] == arr[y * img.width + x].as_py()[elt]
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else:
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assert_deep_equal(px[x, y], arr[y * img.width + x].as_py())
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reloaded = Image.fromarrow(arr, mode, img.size)
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assert reloaded
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assert_image_equal(img, reloaded)
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def test_lifetime() -> None:
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# valgrind shouldn't error out here.
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# arrays should be accessible after the image is deleted.
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img = hopper("L")
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arr_1 = pyarrow.array(img) # type: ignore[call-overload]
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arr_2 = pyarrow.array(img) # type: ignore[call-overload]
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del img
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assert arr_1.sum().as_py() > 0
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del arr_1
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assert arr_2.sum().as_py() > 0
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del arr_2
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def test_lifetime2() -> None:
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# valgrind shouldn't error out here.
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# img should remain after the arrays are collected.
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img = hopper("L")
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arr_1 = pyarrow.array(img) # type: ignore[call-overload]
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arr_2 = pyarrow.array(img) # type: ignore[call-overload]
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assert arr_1.sum().as_py() > 0
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del arr_1
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assert arr_2.sum().as_py() > 0
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del arr_2
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img2 = img.copy()
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px = img2.load()
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assert px # make mypy happy
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assert isinstance(px[0, 0], int)
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