From 518294f01863de32209aa4fb8bcad99a9bf16020 Mon Sep 17 00:00:00 2001
From: Doug Felt <dougfelt@google.com>
Date: Thu, 25 May 2017 11:14:09 -0700
Subject: [PATCH] Fix emoji thumbnail generation to prevent grayscale pngs.
Same problem that we ran into previously with the emoji font--
imagemagick takes RGBA that contain only grayscale and converts
to grayscale with alpha, but although it can display these ok,
chrome can't. So force it to generate RGBA output.
---
generate_emoji_thumbnails.py | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/generate_emoji_thumbnails.py b/generate_emoji_thumbnails.py
index 8ca9d4523..4d292456f 100755
--- a/generate_emoji_thumbnails.py
+++ b/generate_emoji_thumbnails.py
@@ -38,10 +38,10 @@ logger = logging.getLogger('emoji_thumbnails')
def create_thumbnail(src_path, dst_path):
# uses imagemagik
- # we need imagex exactly 72x72 in size, with transparent background
+ # we need images exactly 72x72 in size, with transparent background
subprocess.check_call([
'convert', '-thumbnail', '72x72', '-gravity', 'center', '-background',
- 'none', '-extent', '72x72', src_path, dst_path])
+ 'none', '-extent', '72x72', src_path, 'PNG32:' + dst_path])
def get_inv_aliases():