import pytest from PIL import ImageQt from .helper import assert_image_equal, assert_image_equal_tofile, hopper pytestmark = pytest.mark.skipif( not ImageQt.qt_is_installed, reason="Qt bindings are not installed" ) if ImageQt.qt_is_installed: from PIL.ImageQt import QImage def test_sanity(tmp_path): for mode in ("RGB", "RGBA", "L", "P", "1"): src = hopper(mode) data = ImageQt.toqimage(src) assert isinstance(data, QImage) assert not data.isNull() # reload directly from the qimage rt = ImageQt.fromqimage(data) if mode in ("L", "P", "1"): assert_image_equal(rt, src.convert("RGB")) else: assert_image_equal(rt, src) if mode == "1": # BW appears to not save correctly on QT4 and QT5 # kicks out errors on console: # libpng warning: Invalid color type/bit depth combination # in IHDR # libpng error: Invalid IHDR data continue # Test saving the file tempfile = str(tmp_path / f"temp_{mode}.png") data.save(tempfile) # Check that it actually worked. assert_image_equal_tofile(src, tempfile)