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from __future__ import annotations
import pytest
from PIL import Image
from .helper import hopper
@pytest.mark.parametrize(
"mode, dest_modes",
(
("L", ["I", "F", "LA", "RGB", "RGBA", "RGBX", "CMYK", "YCbCr", "HSV"]),
("I", ["L", "F"]), # Technically I;32 can work for any 4x8bit storage.
("F", ["I", "L", "LA", "RGB", "RGBA", "RGBX", "CMYK", "YCbCr", "HSV"]),
("LA", ["L", "F"]),
("RGB", ["L", "F"]),
("RGBA", ["L", "F"]),
("RGBX", ["L", "F"]),
("CMYK", ["L", "F"]),
("YCbCr", ["L", "F"]),
("HSV", ["L", "F"]),
),
)
def test_invalid_array_type(mode: str, dest_modes: list[str]) -> None:
img = hopper(mode)
for dest_mode in dest_modes:
with pytest.raises(ValueError):
Image.fromarrow(img, dest_mode, img.size)
def test_invalid_array_size() -> None:
img = hopper("RGB")
assert img.size != (10, 10)
with pytest.raises(ValueError):
Image.fromarrow(img, "RGB", (10, 10))
def test_release_schema() -> None:
# these should not error out, valgrind should be clean
img = hopper("L")
schema = img.__arrow_c_schema__()
del schema
def test_release_array() -> None:
# these should not error out, valgrind should be clean
img = hopper("L")
array, schema = img.__arrow_c_array__()
del array
del schema
def test_readonly() -> None:
img = hopper("L")
reloaded = Image.fromarrow(img, img.mode, img.size)
assert reloaded.readonly == 1
reloaded._readonly = 0
assert reloaded.readonly == 1
def test_multiblock_l_image() -> None:
block_size = Image.core.get_block_size()
# check a 2 block image in single channel mode
size = (4096, 2 * block_size // 4096)
img = Image.new("L", size, 128)
with pytest.raises(ValueError):
(schema, arr) = img.__arrow_c_array__()
def test_multiblock_rgba_image() -> None:
block_size = Image.core.get_block_size()
# check a 2 block image in 4 channel mode
size = (4096, (block_size // 4096) // 2)
img = Image.new("RGBA", size, (128, 127, 126, 125))
with pytest.raises(ValueError):
(schema, arr) = img.__arrow_c_array__()
def test_multiblock_l_schema() -> None:
block_size = Image.core.get_block_size()
# check a 2 block image in single channel mode
size = (4096, 2 * block_size // 4096)
img = Image.new("L", size, 128)
with pytest.raises(ValueError):
img.__arrow_c_schema__()
def test_multiblock_rgba_schema() -> None:
block_size = Image.core.get_block_size()
# check a 2 block image in 4 channel mode
size = (4096, (block_size // 4096) // 2)
img = Image.new("RGBA", size, (128, 127, 126, 125))
with pytest.raises(ValueError):
img.__arrow_c_schema__()
def test_singleblock_l_image() -> None:
Image.core.set_use_block_allocator(1)
block_size = Image.core.get_block_size()
# check a 2 block image in 4 channel mode
size = (4096, 2 * (block_size // 4096))
img = Image.new("L", size, 128)
assert img.im.isblock()
(schema, arr) = img.__arrow_c_array__()
assert schema
assert arr
Image.core.set_use_block_allocator(0)
def test_singleblock_rgba_image() -> None:
Image.core.set_use_block_allocator(1)
block_size = Image.core.get_block_size()
# check a 2 block image in 4 channel mode
size = (4096, (block_size // 4096) // 2)
img = Image.new("RGBA", size, (128, 127, 126, 125))
assert img.im.isblock()
(schema, arr) = img.__arrow_c_array__()
assert schema
assert arr
Image.core.set_use_block_allocator(0)
def test_singleblock_l_schema() -> None:
Image.core.set_use_block_allocator(1)
block_size = Image.core.get_block_size()
# check a 2 block image in single channel mode
size = (4096, 2 * block_size // 4096)
img = Image.new("L", size, 128)
assert img.im.isblock()
schema = img.__arrow_c_schema__()
assert schema
Image.core.set_use_block_allocator(0)
def test_singleblock_rgba_schema() -> None:
Image.core.set_use_block_allocator(1)
block_size = Image.core.get_block_size()
# check a 2 block image in 4 channel mode
size = (4096, (block_size // 4096) // 2)
img = Image.new("RGBA", size, (128, 127, 126, 125))
assert img.im.isblock()
schema = img.__arrow_c_schema__()
assert schema
Image.core.set_use_block_allocator(0)
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