asicon.sh

#!/bin/bash
# According to https://developer.apple.com/library/ios/#qa/qa1686/_index.html
# Install ImageMagick with MacPort: sudo port install ImageMagick
# Install ImageMagick with Homebrew: brew install ImageMagick
# Assume source icon is 1024x1024
blur0=""
blur3="-gaussian-blur 3x3"
blur4="-gaussian-blur 4x4"
blur7="-gaussian-blur 7x7"
blur8="-gaussian-blur 8x8"
blur12="-gaussian-blur 12x12"
convert $1 $blur3 -resize 152x152 Icon-76@2x.png        # Home screen for Retina iPad - iOS7
convert $1 $blur3 -resize 144x144 Icon-72@2x.png        # Home screen for Retina iPad
convert $1 $blur3 -resize 120x120 Icon-60@2x.png        # Retina iPhone - iOS7
convert $1 $blur3 -resize 114x114 Icon-57@2x.png        # Home screen for Retina display iPhone/iPod
convert $1 $blur3 -resize 100x100 Icon-50@2x.png        # Spotlight on Retina iPad
convert $1 $blur4 -resize 80x80   Icon-40@2x.png        # Spotlight Retina iPad, iPhone - iOS7
convert $1 $blur4 -resize 76x76   Icon-76.png           # App Store and Home screen for iPad - iOS7
convert $1 $blur4 -resize 72x72   Icon-72.png           # App Store and Home screen for iPad
convert $1 $blur7 -resize 58x58   Icon-29@2x.png        # Spotlight and Settings for Retina display
convert $1 $blur8 -resize 57x57   Icon-57.png           # Home screen on non-Retina iPhone/iPod
convert $1 $blur7 -resize 50x50   Icon-50.png           # Spotlight on non-Retina iPad 1/2/mini
convert $1 $blur12 -resize 40x40  Icon-40.png           # Spotlight iPad - iOS7
convert $1 $blur12 -resize 29x29  Icon-29.png           # Settings on iPad and iPhone, and Spotlight on iPhone