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Replaced tiff_jpeg with jpeg compression when saving TIFF images #4627

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Merged
hugovk merged 1 commit into from
Jun 20, 2020
Merged

Replaced tiff_jpeg with jpeg compression when saving TIFF images #4627

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8 changes: 8 additions & 0 deletions Tests/test_file_libtiff.py
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Original file line number Diff line number Diff line change
Expand Up @@ -448,6 +448,14 @@ def test_compressions(self, tmp_path):
assert size_compressed > size_jpeg
assert size_jpeg > size_jpeg_30

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

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

def test_quality(self, tmp_path):
im = hopper("RGB")
out = str(tmp_path / "temp.tif")
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3 changes: 3 additions & 0 deletions src/PIL/TiffImagePlugin.py
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Expand Up @@ -1427,6 +1427,9 @@ def _save(im, fp, filename):
compression = im.encoderinfo.get("compression", im.info.get("compression"))
if compression is None:
compression = "raw"
elif compression == "tiff_jpeg":
# OJPEG is obsolete, so use new-style JPEG compression instead
compression = "jpeg"

libtiff = WRITE_LIBTIFF or compression != "raw"

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