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139 lines
3.7 KiB
Python
139 lines
3.7 KiB
Python
import io
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import pytest
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from PIL import BmpImagePlugin, Image
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from .helper import assert_image_equal, assert_image_equal_tofile, hopper
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def test_sanity(tmp_path):
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def roundtrip(im):
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outfile = str(tmp_path / "temp.bmp")
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im.save(outfile, "BMP")
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with Image.open(outfile) as reloaded:
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reloaded.load()
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assert im.mode == reloaded.mode
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assert im.size == reloaded.size
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assert reloaded.format == "BMP"
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assert reloaded.get_format_mimetype() == "image/bmp"
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roundtrip(hopper())
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roundtrip(hopper("1"))
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roundtrip(hopper("L"))
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roundtrip(hopper("P"))
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roundtrip(hopper("RGB"))
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def test_invalid_file():
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with open("Tests/images/flower.jpg", "rb") as fp:
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with pytest.raises(SyntaxError):
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BmpImagePlugin.BmpImageFile(fp)
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def test_save_to_bytes():
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output = io.BytesIO()
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im = hopper()
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im.save(output, "BMP")
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output.seek(0)
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with Image.open(output) as reloaded:
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assert im.mode == reloaded.mode
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assert im.size == reloaded.size
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assert reloaded.format == "BMP"
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def test_save_too_large(tmp_path):
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outfile = str(tmp_path / "temp.bmp")
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with Image.new("RGB", (1, 1)) as im:
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im._size = (37838, 37838)
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with pytest.raises(ValueError):
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im.save(outfile)
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def test_dpi():
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dpi = (72, 72)
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output = io.BytesIO()
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with hopper() as im:
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im.save(output, "BMP", dpi=dpi)
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output.seek(0)
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with Image.open(output) as reloaded:
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assert reloaded.info["dpi"] == dpi
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def test_save_bmp_with_dpi(tmp_path):
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# Test for #1301
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# Arrange
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outfile = str(tmp_path / "temp.jpg")
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with Image.open("Tests/images/hopper.bmp") as im:
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# Act
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im.save(outfile, "JPEG", dpi=im.info["dpi"])
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# Assert
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with Image.open(outfile) as reloaded:
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reloaded.load()
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assert im.info["dpi"] == reloaded.info["dpi"]
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assert im.size == reloaded.size
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assert reloaded.format == "JPEG"
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def test_load_dpi_rounding():
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# Round up
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with Image.open("Tests/images/hopper.bmp") as im:
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assert im.info["dpi"] == (96, 96)
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# Round down
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with Image.open("Tests/images/hopper_roundDown.bmp") as im:
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assert im.info["dpi"] == (72, 72)
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def test_save_dpi_rounding(tmp_path):
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outfile = str(tmp_path / "temp.bmp")
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with Image.open("Tests/images/hopper.bmp") as im:
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im.save(outfile, dpi=(72.2, 72.2))
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with Image.open(outfile) as reloaded:
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assert reloaded.info["dpi"] == (72, 72)
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im.save(outfile, dpi=(72.8, 72.8))
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with Image.open(outfile) as reloaded:
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assert reloaded.info["dpi"] == (73, 73)
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def test_load_dib():
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# test for #1293, Imagegrab returning Unsupported Bitfields Format
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with Image.open("Tests/images/clipboard.dib") as im:
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assert im.format == "DIB"
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assert im.get_format_mimetype() == "image/bmp"
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assert_image_equal_tofile(im, "Tests/images/clipboard_target.png")
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def test_save_dib(tmp_path):
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outfile = str(tmp_path / "temp.dib")
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with Image.open("Tests/images/clipboard.dib") as im:
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im.save(outfile)
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with Image.open(outfile) as reloaded:
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assert reloaded.format == "DIB"
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assert reloaded.get_format_mimetype() == "image/bmp"
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assert_image_equal(im, reloaded)
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def test_rgba_bitfields():
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# This test image has been manually hexedited
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# to change the bitfield compression in the header from XBGR to RGBA
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with Image.open("Tests/images/rgb32bf-rgba.bmp") as im:
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# So before the comparing the image, swap the channels
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b, g, r = im.split()[1:]
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im = Image.merge("RGB", (r, g, b))
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assert_image_equal_tofile(im, "Tests/images/bmp/q/rgb32bf-xbgr.bmp")
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