#! /bin/bash
set -ueo pipefail

INKSCAPE="$(which inkscape)"
OPTIPNG="$(which optipng)"

if [[ "$1" == "dark" ]]; then
  SRC_FILE="assets-dark.svg"
  ASSETS_DIR="assets-dark"
else
  SRC_FILE="assets.svg"
  ASSETS_DIR="assets"
fi

i="$2"

GTK2_HIDPI=$(echo "${GTK2_HIDPI-False}" | tr '[:upper:]' '[:lower:]')
if [[ "${GTK2_HIDPI}" == "true" ]] ; then
  EXTRA_OPTIONS=("--export-dpi=192")
else
  EXTRA_OPTIONS=()
fi

if [[ -f "$ASSETS_DIR/$i.png" ]]; then
  echo "'$ASSETS_DIR/$i.png' exists."
else
  echo "Rendering '$ASSETS_DIR/$i.png'"
  "$INKSCAPE" --export-id="$i" \
              --export-id-only \
              --export-background-opacity=0 \
              ${EXTRA_OPTIONS+"${EXTRA_OPTIONS[@]}"} \
              --export-png="$ASSETS_DIR/$i.png" "$SRC_FILE" >/dev/null \
  && "$OPTIPNG" -o7 --quiet "$ASSETS_DIR/$i.png"
fi

exit 0