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|
{ pkgs, ... }:
pkgs.writers.writeDashBin "generate-wallpaper" ''
set -euf
# usage: getimg FILENAME URL
fetch() {
echo "fetch $1"
curl -LsS -z "$1" -o "$1" "$2"
}
# usage: check_type FILENAME TYPE
check_type() {
if ! file -ib "$1" | grep -q "^$2/"; then
echo "$1 is not of type $2" >&2
rm "$1"
return 1
fi
}
# check if file exists and fetch only if missing
fetch_once() {
name=$1
url=$2
test -e "$name" || fetch "$name" "$url"
}
fetch_older_min() {
min=$1
name=$2
url=$3
if ! test "$(find $name -mmin -$min)"; then
fetch "$name" "$url"
fi
}
fetch_older_days() {
days=$1
name=$2
url=$3
if ! test "$(find $name -mmin -$days)"; then
fetch "$name" "$url"
fi
}
# usage: needs_rebuild DST SRC...
needs_rebuild() {
a="$1"
shift
if ! test -e "$a"; then
#echo " $a does not exist" >&2
result=0
else
result=1
for b; do
if test "$b" -nt "$a"; then
#echo " $b is newer than $a" >&2
result=0
fi
done
fi
#case $result in
# 0) echo "$a needs rebuild" >&2;;
#esac
return $result
}
get_neo_url() {
url=$1
curl -Ss "$url" | grep '3600 x 1800' | sed 's/.*href="\([^"]*\)".*/\1/'
}
main() {
cd "$working_dir"
# fetch source images in parallel
fetch_once sun-raw.png \
'http://simpleicon.com/wp-content/uploads/sun-64x64.png' &
fetch_once moon-raw.png \
'http://simpleicon.com/wp-content/uploads/moon__star-64x64.png' &
fetch_once nightmap-raw.jpg \
'https://eoimages.gsfc.nasa.gov/images/imagerecords/144000/144898/BlackMarble_2016_3km.jpg' &
fetch_once daymap-raw.tif \
'https://eoimages.gsfc.nasa.gov/images/imagerecords/57000/57752/land_shallow_topo_8192.tif' &
fetch_older_min 720 ice-raw.jpg $(get_neo_url \
'https://neo.sci.gsfc.nasa.gov/view.php?datasetId=NISE_D') &
fetch_older_days 3 snow-raw.jpg $(get_neo_url \
'https://neo.sci.gsfc.nasa.gov/view.php?datasetId=MOD10C1_E_SNOW') &
fetch_older_days 7 chlora-raw.jpg $(get_neo_url \
'https://neo.sci.gsfc.nasa.gov/view.php?datasetId=MY1DMM_CHLORA') &
fetch_older_days 3 fire-raw.jpg $(get_neo_url \
'https://neo.sci.gsfc.nasa.gov/view.php?datasetId=MOD14A1_E_FIRE') &
# regular fetches
fetch marker.json "$marker_url" &
wait
# fetch clouds if they are older than 3h
if ! test "$(find clouds-raw.png -mmin -180)"; then
${pkgs.nomads-cloud}/bin/nomads-cloud clouds-raw.png
fi
check_type sun-raw.png image
check_type moon-raw.png image
check_type nightmap-raw.jpg image
check_type daymap-raw.tif image
check_type ice-raw.jpg image
check_type snow-raw.jpg image
check_type chlora-raw.jpg image
check_type fire-raw.jpg image
check_type clouds-raw.png image
in_size=3600x1800
xplanet_out_size=1466x1200
out_geometry=1366x768+100+160
for raw in \
nightmap-raw.jpg \
daymap-raw.tif \
snow-raw.jpg \
chlora-raw.jpg \
clouds-raw.png \
;
do
normal=''${raw%-raw.*}.png
if needs_rebuild $normal $raw; then
echo "make $normal; normalize $raw" >&2
convert $raw -scale $in_size $normal
fi
done
# remove snow from ice map
if needs_rebuild ice.png ice-raw.jpg; then
convert ice-raw.jpg -fuzz 20% -fill black -opaque white -scale "$in_size" ice.png
fi
# make fire more red
if needs_rebuild fire.png fire-raw.jpg; then
convert fire-raw.jpg -fuzz 20% -fill '#ef840c' -opaque white -scale "$in_size" fire.png
fi
if needs_rebuild sun.png sun-raw.png; then
convert sun-raw.png -fill gold -opaque black -resize 50% PNG64:sun.png
fi
if needs_rebuild moon.png moon-raw.png; then
convert moon-raw.png -fill royalblue -opaque black -resize 50% PNG64:moon.png
fi
# -- Daymap --
# merge with water chlora layer
if needs_rebuild daymap-final.png daymap.png fire.png snow.png ice.png chlora.png; then
convert daymap.png fire.png -compose lighten -composite daymap-1.png
convert daymap-1.png ice.png -compose lighten -composite daymap-2.png
convert daymap-2.png snow.png -compose lighten -composite daymap-3.png
convert daymap-3.png chlora.png -compose lighten -composite daymap-final.png
fi
# -- Nightmap --
if needs_rebuild nightmap-final.png nightmap.png fire.png snow.png ice.png chlora.png; then
convert nightmap.png fire.png -compose lighten -composite nightmap-1.png
convert nightmap-1.png \( -fill black -colorize 70% ice.png \) -compose lighten -composite nightmap-2.png
convert nightmap-2.png \( -fill black -colorize 70% snow.png \) -compose lighten -composite nightmap-3.png
convert nightmap-3.png \( -fill black -colorize 70% chlora.png \) -compose lighten -composite nightmap-final.png
fi
# rebuild every time to update shadow
xplanet --num_times 1 --geometry $xplanet_out_size \
--output xplanet-output.png --projection merc \
-config ${pkgs.writeText "xplanet.config" ''
[earth]
"Earth"
map=daymap-final.png
night_map=nightmap-final.png
cloud_map=clouds.png
cloud_threshold=1
cloud_gamma=2.5
shade=15
''}
xplanet --num_times 1 --geometry $xplanet_out_size \
--output xplanet-krebs-output.png --projection merc \
-config ${pkgs.writeText "xplanet-krebs.config" ''
[earth]
"Earth"
map=daymap-final.png
night_map=nightmap-final.png
cloud_map=clouds.png
cloud_threshold=1
cloud_gamma=2.5
marker_file=marker_file
shade=15
''}
# trim xplanet output
if needs_rebuild realwallpaper.png xplanet-output.png; then
convert xplanet-output.png -crop $out_geometry \
realwallpaper-tmp.png
mv realwallpaper-tmp.png realwallpaper.png
fi
if needs_rebuild realwallpaper-krebs.png xplanet-krebs-output.png; then
convert xplanet-krebs-output.png -crop $out_geometry \
realwallpaper-krebs-tmp.png
mv realwallpaper-krebs-tmp.png realwallpaper-krebs.png
fi
}
main "$@"
''
|
