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78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
from __future__ import annotations
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import re
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import pytest
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from PIL import Image, JpegXlImagePlugin, features
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from .helper import assert_image_similar_tofile, skip_unless_feature
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try:
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from PIL import _jpegxl
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except ImportError:
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pass
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# cjxl v0.9.2 41b8cdab
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# hopper.jxl: cjxl hopper.png hopper.jxl -q 75 -e 8
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# 16_bit_binary.jxl: cjxl 16_bit_binary.pgm 16_bit_binary.jxl -q 100 -e 9
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class TestUnsupportedJpegXl:
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def test_unsupported(self, monkeypatch: pytest.MonkeyPatch) -> None:
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monkeypatch.setattr(JpegXlImagePlugin, "SUPPORTED", False)
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with pytest.raises(OSError):
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with Image.open("Tests/images/hopper.jxl"):
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pass
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@skip_unless_feature("jpegxl")
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class TestFileJpegXl:
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def test_version(self) -> None:
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_jpegxl.JpegXlDecoderVersion()
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version = features.version_module("jpegxl")
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assert version is not None
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assert re.search(r"\d+\.\d+\.\d+$", version)
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def test_read_rgb(self) -> None:
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"""
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Can we read a RGB mode Jpeg XL file without error?
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Does it have the bits we expect?
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"""
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with Image.open("Tests/images/hopper.jxl") as im:
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assert im.mode == "RGB"
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assert im.size == (128, 128)
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assert im.format == "JPEG XL"
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im.load()
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im.getdata()
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# generated with:
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# djxl hopper.jxl hopper_jxl_bits.ppm
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assert_image_similar_tofile(im, "Tests/images/hopper_jxl_bits.ppm", 1)
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def test_read_i16(self) -> None:
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"""
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Can we read 16-bit Grayscale Jpeg XL image?
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"""
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with Image.open("Tests/images/jxl/16bit_subcutaneous.cropped.jxl") as im:
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assert im.mode == "I;16"
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assert im.size == (128, 64)
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assert im.format == "JPEG XL"
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im.load()
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im.getdata()
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assert_image_similar_tofile(
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im, "Tests/images/jxl/16bit_subcutaneous.cropped.png", 1
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)
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def test_JpegXlDecode_with_invalid_args(self) -> None:
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"""
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Calling decoder functions with no arguments should result in an error.
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"""
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with pytest.raises(TypeError):
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_jpegxl.PILJpegXlDecoder()
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