Merge pull request python-pillow#7317 from radarhere/pdf_alpha

Set SMaskInData to 1 for LA PDFs
nulano · Aug 4, 2023 · fc99a58 · fc99a58
2 parents 95257df + c5b4ad9
commit fc99a58
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/PIL/PdfImagePlugin.py b/src/PIL/PdfImagePlugin.py
@@ -162,8 +162,8 @@ def _save(im, fp, filename, save_all=False):
             elif im.mode == "LA":
                 filter = "JPXDecode"
                 # 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()