From 1ff2b6630a3d2e05a1f834b65ce2903689a2992f Mon Sep 17 00:00:00 2001 From: David Schmidt Date: Thu, 21 Mar 2013 16:54:04 +0100 Subject: [PATCH] fixed bug with png-images with transparency palette --- PIL/PngImagePlugin.py | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/PIL/PngImagePlugin.py b/PIL/PngImagePlugin.py index d556360a9..ace71d21d 100644 --- a/PIL/PngImagePlugin.py +++ b/PIL/PngImagePlugin.py @@ -550,11 +550,11 @@ def _save(im, fp, filename, chunk=putchunk, check=0): if "transparency" in im.encoderinfo: if im.mode == "P": - transparency = max(0, min(255, im.encoderinfo["transparency"])) - alpha = b'\xFF' * transparency + b'\0' - # limit to actual palette size - alpha_bytes = 2**bits - chunk(fp, b"tRNS", alpha[:alpha_bytes]) + if isinstance(im.encoderinfo["transparency"], bytes): + chunk(fp, b"tRNS", b'\xFF' + im.encoderinfo["transparency"] + b'\0') + else: + transparency = max(0, min(255, im.encoderinfo["transparency"])) + chunk(fp, b"tRNS", b'\xFF' + transparency + b'\0') elif im.mode == "L": transparency = max(0, min(65535, im.encoderinfo["transparency"])) chunk(fp, b"tRNS", o16(transparency))