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97 lines
2.8 KiB
Python
97 lines
2.8 KiB
Python
from __future__ import annotations
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from io import BytesIO
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from pathlib import Path
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from typing import IO
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import pytest
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from PIL import Image, ImageFile, WmfImagePlugin
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from .helper import assert_image_similar_tofile, hopper
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def test_load_raw() -> None:
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# Test basic EMF open and rendering
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with Image.open("Tests/images/drawing.emf") as im:
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if hasattr(Image.core, "drawwmf"):
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# Currently, support for WMF/EMF is Windows-only
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im.load()
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# Compare to reference rendering
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assert_image_similar_tofile(im, "Tests/images/drawing_emf_ref.png", 0)
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# Test basic WMF open and rendering
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with Image.open("Tests/images/drawing.wmf") as im:
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if hasattr(Image.core, "drawwmf"):
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# Currently, support for WMF/EMF is Windows-only
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im.load()
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# Compare to reference rendering
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assert_image_similar_tofile(im, "Tests/images/drawing_wmf_ref.png", 2.0)
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def test_load() -> None:
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with Image.open("Tests/images/drawing.emf") as im:
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if hasattr(Image.core, "drawwmf"):
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assert im.load()[0, 0] == (255, 255, 255)
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def test_load_zero_inch() -> None:
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b = BytesIO(b"\xd7\xcd\xc6\x9a\x00\x00" + b"\x00" * 10)
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with pytest.raises(ValueError):
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with Image.open(b):
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pass
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def test_register_handler(tmp_path: Path) -> None:
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class TestHandler(ImageFile.StubHandler):
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methodCalled = False
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def load(self, im: ImageFile.StubImageFile) -> Image.Image:
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return Image.new("RGB", (1, 1))
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def save(self, im: Image.Image, fp: IO[bytes], filename: str) -> None:
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self.methodCalled = True
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handler = TestHandler()
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original_handler = WmfImagePlugin._handler
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WmfImagePlugin.register_handler(handler)
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im = hopper()
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tmpfile = str(tmp_path / "temp.wmf")
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im.save(tmpfile)
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assert handler.methodCalled
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# Restore the state before this test
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WmfImagePlugin.register_handler(original_handler)
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def test_load_float_dpi() -> None:
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with Image.open("Tests/images/drawing.emf") as im:
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assert im.info["dpi"] == 1423.7668161434979
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with open("Tests/images/drawing.emf", "rb") as fp:
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data = fp.read()
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b = BytesIO(data[:8] + b"\x06\xFA" + data[10:])
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with Image.open(b) as im:
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assert im.info["dpi"][0] == 2540
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def test_load_set_dpi() -> None:
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with Image.open("Tests/images/drawing.wmf") as im:
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assert im.size == (82, 82)
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if hasattr(Image.core, "drawwmf"):
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im.load(144)
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assert im.size == (164, 164)
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assert_image_similar_tofile(im, "Tests/images/drawing_wmf_ref_144.png", 2.1)
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@pytest.mark.parametrize("ext", (".wmf", ".emf"))
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def test_save(ext: str, tmp_path: Path) -> None:
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im = hopper()
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tmpfile = str(tmp_path / ("temp" + ext))
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with pytest.raises(OSError):
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im.save(tmpfile)
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