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build_game_icons.sh

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  • build_game_icons.sh 1.96 KiB
    #! /bin/bash
    
    # Check dependencies
    command -v inkscape >/dev/null 2>&1 || { echo >&2 "I require inkscape but it's not installed. Aborting."; exit 1; }
    command -v scour >/dev/null 2>&1 || { echo >&2 "I require scour but it's not installed. Aborting."; exit 1; }
    command -v optipng >/dev/null 2>&1 || { echo >&2 "I require optipng but it's not installed. Aborting."; exit 1; }
    
    CURRENT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
    BASE_DIR="$(dirname "${CURRENT_DIR}")"
    ASSETS_DIR="${BASE_DIR}/assets"
    
    OPTIPNG_OPTIONS="-preserve -quiet -o7"
    ICON_SIZE=192
    
    #######################################################
    
    # Game images
    AVAILABLE_GAME_IMAGES="
      button_back
      button_start
      button_resume_game
      button_delete_saved_game
      game_fail
      game_win
      placeholder
    "
    
    #######################################################
    
    # optimize svg
    function optimize_svg() {
      SOURCE="$1"
    
      cp ${SOURCE} ${SOURCE}.tmp
      scour \
          --remove-descriptive-elements \
          --enable-id-stripping \
          --enable-viewboxing \
          --enable-comment-stripping \
          --nindent=4 \
          --quiet \
          -i ${SOURCE}.tmp \
          -o ${SOURCE}
      rm ${SOURCE}.tmp
    }
    
    # build icons
    function build_icon() {
      SOURCE="$1"
      TARGET="$2"
    
      echo "Building ${TARGET}"
    
      if [ ! -f "${SOURCE}" ]; then
        echo "Missing file: ${SOURCE}"
        exit 1
      fi
    
      optimize_svg "${SOURCE}"
    
      inkscape \
          --export-width=${ICON_SIZE} \
          --export-height=${ICON_SIZE} \
          --export-filename=${TARGET} \
          ${SOURCE}
    
      optipng ${OPTIPNG_OPTIONS} ${TARGET}
    }
    
    #######################################################
    
    # Create output folders
    mkdir -p ${ASSETS_DIR}/icons
    mkdir -p ${ASSETS_DIR}/skins
    
    # Delete existing generated images
    find ${ASSETS_DIR}/icons -type f -name "*.png" -delete
    find ${ASSETS_DIR}/skins -type f -name "*.png" -delete
    
    # build game images
    for GAME_IMAGE in ${AVAILABLE_GAME_IMAGES}
    do
      build_icon ${CURRENT_DIR}/${GAME_IMAGE}.svg ${ASSETS_DIR}/icons/${GAME_IMAGE}.png
    done