Initial public source release

Split reusable rendering and format support into vectorail-core and vectorail-gc.

tools/prepare_psp_demo.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env sh
+set -eu
+
+repo_dir=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+stage_path=${1:-"$repo_dir/GC/data/stage/ac_10pt8tion_easy.dat"}
+output_dir=${2:-"$repo_dir/dist/PSP/GAME/OpenRoller"}
+audio_path=${3:-}
+
+cmake -S "$repo_dir" -B "$repo_dir/build"
+cmake --build "$repo_dir/build" --target openroller-psp-pack
+"$repo_dir/tools/build_psp.sh"
+
+mkdir -p "$output_dir"
+cp "$repo_dir/psp/EBOOT.PBP" "$output_dir/EBOOT.PBP"
+"$repo_dir/build/openroller-psp-pack" "$stage_path" "$output_dir/stage.orps"
+
+if [ -z "$audio_path" ]; then
+    stage_name=$(basename "$stage_path" .dat)
+    song_token=${stage_name#ac_}
+    song_token=${song_token%_easy}
+    song_token=${song_token%_normal}
+    song_token=${song_token%_hard}
+    song_token=${song_token%_extra}
+    audio_path=$(find "$(dirname "$stage_path")/sound" -maxdepth 1 -type f \
+        -iname "*_${song_token}_BGM.wav" -print -quit)
+fi
+
+if [ -n "$audio_path" ] && [ -f "$audio_path" ]; then
+    ffmpeg -y -hide_banner -loglevel error -i "$audio_path" \
+        -map 0:a:0 -ar 44100 -ac 2 -c:a libmp3lame -b:a 128k \
+        -write_xing 0 -id3v2_version 0 "$output_dir/audio.mp3"
+else
+    echo "Warning: BGM WAV was not found; demo will use the fallback timer" >&2
+fi
+
+echo "Prepared: $output_dir"