mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-11-10 19:56:47 +03:00
336 lines
8.1 KiB
Python
336 lines
8.1 KiB
Python
import pytest
|
|
|
|
from PIL import Image
|
|
|
|
from .helper import assert_image, assert_image_equal, assert_image_similar, hopper
|
|
|
|
|
|
def test_sanity():
|
|
def convert(im, mode):
|
|
out = im.convert(mode)
|
|
assert out.mode == mode
|
|
assert out.size == im.size
|
|
|
|
modes = (
|
|
"1",
|
|
"L",
|
|
"LA",
|
|
"P",
|
|
"PA",
|
|
"I",
|
|
"F",
|
|
"RGB",
|
|
"RGBA",
|
|
"RGBX",
|
|
"CMYK",
|
|
"YCbCr",
|
|
"HSV",
|
|
)
|
|
|
|
for input_mode in modes:
|
|
im = hopper(input_mode)
|
|
for output_mode in modes:
|
|
convert(im, output_mode)
|
|
|
|
# Check 0
|
|
im = Image.new(input_mode, (0, 0))
|
|
for output_mode in modes:
|
|
convert(im, output_mode)
|
|
|
|
|
|
def test_unsupported_conversion():
|
|
im = hopper()
|
|
with pytest.raises(ValueError):
|
|
im.convert("INVALID")
|
|
|
|
|
|
def test_default():
|
|
im = hopper("P")
|
|
assert im.mode == "P"
|
|
converted_im = im.convert()
|
|
assert_image(converted_im, "RGB", im.size)
|
|
converted_im = im.convert()
|
|
assert_image(converted_im, "RGB", im.size)
|
|
|
|
im.info["transparency"] = 0
|
|
converted_im = im.convert()
|
|
assert_image(converted_im, "RGBA", im.size)
|
|
|
|
|
|
# ref https://github.com/python-pillow/Pillow/issues/274
|
|
|
|
|
|
def _test_float_conversion(im):
|
|
orig = im.getpixel((5, 5))
|
|
converted = im.convert("F").getpixel((5, 5))
|
|
assert orig == converted
|
|
|
|
|
|
def test_8bit():
|
|
with Image.open("Tests/images/hopper.jpg") as im:
|
|
_test_float_conversion(im.convert("L"))
|
|
|
|
|
|
def test_16bit():
|
|
with Image.open("Tests/images/16bit.cropped.tif") as im:
|
|
_test_float_conversion(im)
|
|
|
|
for color in (65535, 65536):
|
|
im = Image.new("I", (1, 1), color)
|
|
im_i16 = im.convert("I;16")
|
|
assert im_i16.getpixel((0, 0)) == 65535
|
|
|
|
|
|
def test_16bit_workaround():
|
|
with Image.open("Tests/images/16bit.cropped.tif") as im:
|
|
_test_float_conversion(im.convert("I"))
|
|
|
|
|
|
def test_opaque():
|
|
alpha = hopper("P").convert("PA").getchannel("A")
|
|
|
|
solid = Image.new("L", (128, 128), 255)
|
|
assert_image_equal(alpha, solid)
|
|
|
|
|
|
def test_rgba_p():
|
|
im = hopper("RGBA")
|
|
im.putalpha(hopper("L"))
|
|
|
|
converted = im.convert("P")
|
|
comparable = converted.convert("RGBA")
|
|
|
|
assert_image_similar(im, comparable, 20)
|
|
|
|
|
|
def test_rgba():
|
|
with Image.open("Tests/images/transparent.png") as im:
|
|
assert im.mode == "RGBA"
|
|
|
|
assert_image_similar(im.convert("RGBa").convert("RGB"), im.convert("RGB"), 1.5)
|
|
|
|
|
|
def test_trns_p(tmp_path):
|
|
im = hopper("P")
|
|
im.info["transparency"] = 0
|
|
|
|
f = str(tmp_path / "temp.png")
|
|
|
|
im_l = im.convert("L")
|
|
assert im_l.info["transparency"] == 1 # undone
|
|
im_l.save(f)
|
|
|
|
im_rgb = im.convert("RGB")
|
|
assert im_rgb.info["transparency"] == (0, 1, 2) # undone
|
|
im_rgb.save(f)
|
|
|
|
|
|
# ref https://github.com/python-pillow/Pillow/issues/664
|
|
|
|
|
|
@pytest.mark.parametrize("mode", ("LA", "PA", "RGBA"))
|
|
def test_trns_p_transparency(mode):
|
|
# Arrange
|
|
im = hopper("P")
|
|
im.info["transparency"] = 128
|
|
|
|
# Act
|
|
converted_im = im.convert(mode)
|
|
|
|
# Assert
|
|
assert "transparency" not in converted_im.info
|
|
if mode == "PA":
|
|
assert converted_im.palette is not None
|
|
else:
|
|
# https://github.com/python-pillow/Pillow/issues/2702
|
|
assert converted_im.palette is None
|
|
|
|
|
|
def test_trns_l(tmp_path):
|
|
im = hopper("L")
|
|
im.info["transparency"] = 128
|
|
|
|
f = str(tmp_path / "temp.png")
|
|
|
|
im_la = im.convert("LA")
|
|
assert "transparency" not in im_la.info
|
|
im_la.save(f)
|
|
|
|
im_rgb = im.convert("RGB")
|
|
assert im_rgb.info["transparency"] == (128, 128, 128) # undone
|
|
im_rgb.save(f)
|
|
|
|
im_p = im.convert("P")
|
|
assert "transparency" in im_p.info
|
|
im_p.save(f)
|
|
|
|
im_p = im.convert("P", palette=Image.Palette.ADAPTIVE)
|
|
assert "transparency" in im_p.info
|
|
im_p.save(f)
|
|
|
|
|
|
def test_trns_RGB(tmp_path):
|
|
im = hopper("RGB")
|
|
im.info["transparency"] = im.getpixel((0, 0))
|
|
|
|
f = str(tmp_path / "temp.png")
|
|
|
|
im_l = im.convert("L")
|
|
assert im_l.info["transparency"] == im_l.getpixel((0, 0)) # undone
|
|
im_l.save(f)
|
|
|
|
im_p = im.convert("P")
|
|
assert "transparency" in im_p.info
|
|
im_p.save(f)
|
|
|
|
im_rgba = im.convert("RGBA")
|
|
assert "transparency" not in im_rgba.info
|
|
im_rgba.save(f)
|
|
|
|
im_p = pytest.warns(UserWarning, im.convert, "P", palette=Image.Palette.ADAPTIVE)
|
|
assert "transparency" not in im_p.info
|
|
im_p.save(f)
|
|
|
|
im = Image.new("RGB", (1, 1))
|
|
im.info["transparency"] = im.getpixel((0, 0))
|
|
im_p = im.convert("P", palette=Image.Palette.ADAPTIVE)
|
|
assert im_p.info["transparency"] == im_p.getpixel((0, 0))
|
|
im_p.save(f)
|
|
|
|
|
|
@pytest.mark.parametrize("convert_mode", ("L", "LA", "I"))
|
|
def test_l_macro_rounding(convert_mode):
|
|
for mode in ("P", "PA"):
|
|
im = Image.new(mode, (1, 1))
|
|
im.palette.getcolor((0, 1, 2))
|
|
|
|
converted_im = im.convert(convert_mode)
|
|
px = converted_im.load()
|
|
converted_color = px[0, 0]
|
|
if convert_mode == "LA":
|
|
converted_color = converted_color[0]
|
|
assert converted_color == 1
|
|
|
|
|
|
def test_gif_with_rgba_palette_to_p():
|
|
# See https://github.com/python-pillow/Pillow/issues/2433
|
|
with Image.open("Tests/images/hopper.gif") as im:
|
|
im.info["transparency"] = 255
|
|
im.load()
|
|
assert im.palette.mode == "RGB"
|
|
im_p = im.convert("P")
|
|
|
|
# Should not raise ValueError: unrecognized raw mode
|
|
im_p.load()
|
|
|
|
|
|
def test_p_la():
|
|
im = hopper("RGBA")
|
|
alpha = hopper("L")
|
|
im.putalpha(alpha)
|
|
|
|
comparable = im.convert("P").convert("LA").getchannel("A")
|
|
|
|
assert_image_similar(alpha, comparable, 5)
|
|
|
|
|
|
def test_p2pa_alpha():
|
|
with Image.open("Tests/images/tiny.png") as im:
|
|
assert im.mode == "P"
|
|
|
|
im_pa = im.convert("PA")
|
|
assert im_pa.mode == "PA"
|
|
|
|
im_a = im_pa.getchannel("A")
|
|
for x in range(4):
|
|
alpha = 255 if x > 1 else 0
|
|
for y in range(4):
|
|
assert im_a.getpixel((x, y)) == alpha
|
|
|
|
|
|
def test_p2pa_palette():
|
|
with Image.open("Tests/images/tiny.png") as im:
|
|
im_pa = im.convert("PA")
|
|
assert im_pa.getpalette() == im.getpalette()
|
|
|
|
|
|
def test_matrix_illegal_conversion():
|
|
# Arrange
|
|
im = hopper("CMYK")
|
|
# fmt: off
|
|
matrix = (
|
|
0.412453, 0.357580, 0.180423, 0,
|
|
0.212671, 0.715160, 0.072169, 0,
|
|
0.019334, 0.119193, 0.950227, 0)
|
|
# fmt: on
|
|
assert im.mode != "RGB"
|
|
|
|
# Act / Assert
|
|
with pytest.raises(ValueError):
|
|
im.convert(mode="CMYK", matrix=matrix)
|
|
|
|
|
|
def test_matrix_wrong_mode():
|
|
# Arrange
|
|
im = hopper("L")
|
|
# fmt: off
|
|
matrix = (
|
|
0.412453, 0.357580, 0.180423, 0,
|
|
0.212671, 0.715160, 0.072169, 0,
|
|
0.019334, 0.119193, 0.950227, 0)
|
|
# fmt: on
|
|
assert im.mode == "L"
|
|
|
|
# Act / Assert
|
|
with pytest.raises(ValueError):
|
|
im.convert(mode="L", matrix=matrix)
|
|
|
|
|
|
@pytest.mark.parametrize("mode", ("RGB", "L"))
|
|
def test_matrix_xyz(mode):
|
|
# Arrange
|
|
im = hopper("RGB")
|
|
im.info["transparency"] = (255, 0, 0)
|
|
# fmt: off
|
|
matrix = (
|
|
0.412453, 0.357580, 0.180423, 0,
|
|
0.212671, 0.715160, 0.072169, 0,
|
|
0.019334, 0.119193, 0.950227, 0)
|
|
# fmt: on
|
|
assert im.mode == "RGB"
|
|
|
|
# Act
|
|
# Convert an RGB image to the CIE XYZ colour space
|
|
converted_im = im.convert(mode=mode, matrix=matrix)
|
|
|
|
# Assert
|
|
assert converted_im.mode == mode
|
|
assert converted_im.size == im.size
|
|
with Image.open("Tests/images/hopper-XYZ.png") as target:
|
|
if converted_im.mode == "RGB":
|
|
assert_image_similar(converted_im, target, 3)
|
|
assert converted_im.info["transparency"] == (105, 54, 4)
|
|
else:
|
|
assert_image_similar(converted_im, target.getchannel(0), 1)
|
|
assert converted_im.info["transparency"] == 105
|
|
|
|
|
|
def test_matrix_identity():
|
|
# Arrange
|
|
im = hopper("RGB")
|
|
# fmt: off
|
|
identity_matrix = (
|
|
1, 0, 0, 0,
|
|
0, 1, 0, 0,
|
|
0, 0, 1, 0)
|
|
# fmt: on
|
|
assert im.mode == "RGB"
|
|
|
|
# Act
|
|
# Convert with an identity matrix
|
|
converted_im = im.convert(mode="RGB", matrix=identity_matrix)
|
|
|
|
# Assert
|
|
# No change
|
|
assert_image_equal(converted_im, im)
|