Description: use rsvg-convert instead of imagemagick to reduce dependencies
Author: Johannes Schauer <j.schauer@email.de>
Forwarded: https://github.com/coolwanglu/pdf2htmlEX/issues/385

--- a/logo/update_png.sh
+++ b/logo/update_png.sh
@@ -1,8 +1,8 @@
 #!/bin/sh -ex
 
 # convert raw SVG into png of different sizes
-convert -background none -resize 64x64^ pdf2htmlEX.svg pdf2htmlEX-64x64.png
-convert -background none -resize 256x256^ pdf2htmlEX.svg pdf2htmlEX-256x256.png
+rsvg-convert --format png --width 64 --height 64 pdf2htmlEX.svg > pdf2htmlEX-64x64.png
+rsvg-convert --format png --width 256 --height 256 pdf2htmlEX.svg > pdf2htmlEX-256x256.png
 # optimize for web
 pngnq pdf2htmlEX-64x64.png
 mv pdf2htmlEX-64x64-nq8.png ../share/pdf2htmlEX-64x64.png
