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Replaced tiff_deflate with tiff_adobe_deflate compression when saving TIFF images #5343

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merged 1 commit into from Mar 19, 2021
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Replaced tiff_deflate with tiff_adobe_deflate compression when saving TIFF images #5343

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8 changes: 8 additions & 0 deletions Tests/test_file_libtiff.py
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Expand Up @@ -471,6 +471,14 @@ def test_tiff_jpeg_compression(self, tmp_path):
with Image.open(out) as reloaded:
assert reloaded.info["compression"] == "jpeg"

def test_tiff_deflate_compression(self, tmp_path):
im = hopper("RGB")
out = str(tmp_path / "temp.tif")
im.save(out, compression="tiff_deflate")

with Image.open(out) as reloaded:
assert reloaded.info["compression"] == "tiff_adobe_deflate"

def test_quality(self, tmp_path):
im = hopper("RGB")
out = str(tmp_path / "temp.tif")
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2 changes: 2 additions & 0 deletions src/PIL/TiffImagePlugin.py
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Expand Up @@ -1442,6 +1442,8 @@ def _save(im, fp, filename):
elif compression == "tiff_jpeg":
# OJPEG is obsolete, so use new-style JPEG compression instead
compression = "jpeg"
elif compression == "tiff_deflate":
compression = "tiff_adobe_deflate"

libtiff = WRITE_LIBTIFF or compression != "raw"

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