Pillow/Tests/test_image_quantize.py
nulano a3ab868b0f xfail tests failing on ppc64le on GHA
(cherry picked from commit 9c7fb5bd14c3064fede96131a0f7f67abf26a4e7)
2020-12-12 15:26:42 +01:00

77 lines
2.3 KiB
Python

import pytest
from PIL import Image
from .helper import assert_image, assert_image_similar, hopper, is_ppc64le
def test_sanity():
image = hopper()
converted = image.quantize()
assert_image(converted, "P", converted.size)
assert_image_similar(converted.convert("RGB"), image, 10)
image = hopper()
converted = image.quantize(palette=hopper("P"))
assert_image(converted, "P", converted.size)
assert_image_similar(converted.convert("RGB"), image, 60)
@pytest.mark.xfail(is_ppc64le(), reason="failing on ppc64le on GHA")
def test_libimagequant_quantize():
image = hopper()
try:
converted = image.quantize(100, Image.LIBIMAGEQUANT)
except ValueError as ex: # pragma: no cover
if "dependency" in str(ex).lower():
pytest.skip("libimagequant support not available")
else:
raise
assert_image(converted, "P", converted.size)
assert_image_similar(converted.convert("RGB"), image, 15)
assert len(converted.getcolors()) == 100
def test_octree_quantize():
image = hopper()
converted = image.quantize(100, Image.FASTOCTREE)
assert_image(converted, "P", converted.size)
assert_image_similar(converted.convert("RGB"), image, 20)
assert len(converted.getcolors()) == 100
def test_rgba_quantize():
image = hopper("RGBA")
with pytest.raises(ValueError):
image.quantize(method=0)
assert image.quantize().convert().mode == "RGBA"
def test_quantize():
with Image.open("Tests/images/caption_6_33_22.png") as image:
image = image.convert("RGB")
converted = image.quantize()
assert_image(converted, "P", converted.size)
assert_image_similar(converted.convert("RGB"), image, 1)
def test_quantize_no_dither():
image = hopper()
with Image.open("Tests/images/caption_6_33_22.png") as palette:
palette = palette.convert("P")
converted = image.quantize(dither=0, palette=palette)
assert_image(converted, "P", converted.size)
def test_quantize_dither_diff():
image = hopper()
with Image.open("Tests/images/caption_6_33_22.png") as palette:
palette = palette.convert("P")
dither = image.quantize(dither=1, palette=palette)
nodither = image.quantize(dither=0, palette=palette)
assert dither.tobytes() != nodither.tobytes()