Pad PDF palette to 256 entries when saving

radarhere · Nov 15, 2023 · 55d8283 · 55d8283
1 parent da0b826
commit 55d8283
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/PIL/PdfImagePlugin.py b/src/PIL/PdfImagePlugin.py
@@ -93,6 +93,7 @@ def _write_image(im, filename, existing_pdf, image_refs):
     elif im.mode == "P":
         filter = "ASCIIHexDecode"
         palette = im.getpalette()
+        palette += (768 - len(palette)) * [0]
         dict_obj["ColorSpace"] = [
             PdfParser.PdfName("Indexed"),
             PdfParser.PdfName("DeviceRGB"),