From 3d7e0e6812b0398cb9bcc9c2d55cfef5d66a2e3f Mon Sep 17 00:00:00 2001
From: Johannes Schauer Marin Rodrigues <josch@mister-muffin.de>
Date: Mon, 14 Jun 2021 18:34:46 +0200
Subject: [PATCH] allow palette PNG images with ICC profile (closes: #107)

---
 src/img2pdf.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/img2pdf.py b/src/img2pdf.py
index bbaac34..8407221 100755
--- a/src/img2pdf.py
+++ b/src/img2pdf.py
@@ -823,7 +823,9 @@ class pdfdoc(object):
             elif color == Colorspace.CMYK or color == Colorspace["CMYK;I"]:
                 iccpdict[PdfName.N] = 4
             elif color == Colorspace.P:
-                raise Exception("Cannot have Palette images with ICC profile")
+                # Only the png format can have an icc profile as well as a
+                # color palette. A png palette is always RGB.
+                iccpdict[PdfName.N] = 3
             colorspace = [PdfName.ICCBased, iccpdict]
 
         # either embed the whole jpeg or deflate the bitmap representation