deno icons

build.sh

#!/bin/sh

# This script generates multi-size .ico files from the highly stylized "simple"
# Deno logos, designed by HashRock.

# The complication stems from the fact the the dimensions of the original .png
# files is 252x252 pixels. Naively rescaling these images to 256x256 or any
# other power of 2 produces ugly artifacts.

# Note that the output of the black-and-white logo transformation isn't
# entirely artifact-free because the source image has some glitches already.

# ImageMagick must be installed and available in $PATH to run this script.
# It was written for imagemagick 7.x, but version 6.x probably works too.

convert                                                                    \
  -size 256x256                                                            \
  \( xc:transparent -fill black -draw "circle 127.5,127.5 127.5,0.1" \)    \
  \( ./bw.png -repage +2+2 \)                                              \
  -background transparent -compose src-over -flatten                       \
  +repage -depth 8                                                         \
  -define icon:auto-resize="256,128,96,64,48,40,32,24,20,16" -compress zip \
  bw.ico

convert                                                                    \
  -size 256x256                                                            \
  \( xc:transparent -fill white -draw "circle 127.5,127.5 127.5,0.1" \)    \
  \( ./color.png -repage +2+2 \)                                           \
  -background transparent -compose src-over -flatten                       \
  +repage -depth 8                                                         \
  -define icon:auto-resize="256,128,96,64,48,40,32,24,20,16" -compress zip \
  color.ico

bw.ico

bw.png

color.ico

color.png