mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-11-04 09:57:43 +03:00
65 lines
1.9 KiB
Python
65 lines
1.9 KiB
Python
import pytest
|
|
|
|
from PIL import Image, ImagePalette
|
|
|
|
from .helper import assert_image_equal, assert_image_equal_tofile, hopper
|
|
|
|
|
|
def test_putpalette():
|
|
def palette(mode):
|
|
im = hopper(mode).copy()
|
|
im.putpalette(list(range(256)) * 3)
|
|
p = im.getpalette()
|
|
if p:
|
|
return im.mode, p[:10]
|
|
return im.mode
|
|
|
|
with pytest.raises(ValueError):
|
|
palette("1")
|
|
for mode in ["L", "LA", "P", "PA"]:
|
|
assert palette(mode) == (
|
|
"PA" if "A" in mode else "P",
|
|
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
|
|
)
|
|
with pytest.raises(ValueError):
|
|
palette("I")
|
|
with pytest.raises(ValueError):
|
|
palette("F")
|
|
with pytest.raises(ValueError):
|
|
palette("RGB")
|
|
with pytest.raises(ValueError):
|
|
palette("RGBA")
|
|
with pytest.raises(ValueError):
|
|
palette("YCbCr")
|
|
|
|
|
|
def test_imagepalette():
|
|
im = hopper("P")
|
|
im.putpalette(ImagePalette.negative())
|
|
assert_image_equal_tofile(im.convert("RGB"), "Tests/images/palette_negative.png")
|
|
|
|
im.putpalette(ImagePalette.random())
|
|
|
|
im.putpalette(ImagePalette.sepia())
|
|
assert_image_equal_tofile(im.convert("RGB"), "Tests/images/palette_sepia.png")
|
|
|
|
im.putpalette(ImagePalette.wedge())
|
|
assert_image_equal_tofile(im.convert("RGB"), "Tests/images/palette_wedge.png")
|
|
|
|
|
|
def test_putpalette_with_alpha_values():
|
|
with Image.open("Tests/images/transparent.gif") as im:
|
|
expected = im.convert("RGBA")
|
|
|
|
palette = im.getpalette()
|
|
transparency = im.info.pop("transparency")
|
|
|
|
palette_with_alpha_values = []
|
|
for i in range(256):
|
|
color = palette[i * 3 : i * 3 + 3]
|
|
alpha = 0 if i == transparency else 255
|
|
palette_with_alpha_values += color + [alpha]
|
|
im.putpalette(palette_with_alpha_values, "RGBA")
|
|
|
|
assert_image_equal(im.convert("RGBA"), expected)
|