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Set SMaskInData to 1 for PDFs with alpha

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This commit is contained in:
Andrew Murray 2023-08-04 18:46:58 +10:00
parent 95257dff87
commit bc11b2d6a9
1 changed files with 1 additions and 0 deletions
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src/PIL/PdfImagePlugin.py
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@ -164,6 +164,7 @@ def _save(im, fp, filename, save_all=False):
# params = f"<< /Predictor 15 /Columns {width-2} >>"
colorspace = PdfParser.PdfName("DeviceGray")
procset = "ImageB" # grayscale
dict_obj["SMaskInData"] = 1
elif im.mode == "P":
filter = "ASCIIHexDecode"
palette = im.getpalette()