Programmatically resize banners for MOCA app

resize.sh

#!/bin/bash

IMAGES=$@

resize() {
  local DENSITY=$1
  shift
  local SIZE=$1
  shift
  local UNSHARP=$1
  for i in ${IMAGES}; do
    IMG="`basename "$i"`"
    echo "[${DENSITY}] Resizing $i"
    if [ ${UNSHARP} -eq 1 ]; then
      convert "$i" -filter Lanczos -resize ${SIZE}\> -unsharp 0x2+0.2+0.314 -type Palette -format png8 -strip "${DENSITY}/${IMG}"
    else
      convert "$i" -filter Lanczos -resize ${SIZE}\> -type Palette -format png8 -strip "${DENSITY}/${IMG}"
    fi
  done
}

DENSITIES=( xhdpi hdpi mdpi ldpi )
SIZES=( 600x100 450x75 300x50 225x38 )
UNSHARP=( 0 0 1 1 )

mkdir -p ${DENSITIES[@]}

for i in `seq 0 $((${#DENSITIES[@]} - 1))`; do
  resize ${DENSITIES[$i]} ${SIZES[$i]} ${UNSHARP[$i]}
done

echo -n "Performing final optimization pass..."
for density in ${DENSITIES[@]}; do
  optipng -o7 ${density}/*.png 2>&1 >/dev/null
done

echo " done"

exit 0