#!/usr/bin/env bash
# Compila o Transcend do fredygames.com: o jogo de tiro abstrato de Jason Rohrer (2005, GNU GPL) em
# WebAssembly, com o Emscripten 6.0.10. Este script e os arquivos de Builds/minorgems-web/ fazem parte do
# codigo-fonte publicado junto do jogo (GPL: o fonte exato do binario).
#
#   source <emsdk>/emsdk_env.sh      # emsdk install 6.0.10 && emsdk activate 6.0.10
#   src/FredGames.Bundler/Builds/build-transcend.sh
#
# Fonte: o tarball upstream do Debian (transcend_0.3.dfsg2.orig.tar.gz: o codigo da versao 0.3 do autor,
# com a biblioteca minorGems dele, sem a pasta do portaudio), conferido pelo SHA-256. O jogo nao leva
# nenhuma mudanca de codigo: o que o Emscripten nao tem fica nos arquivos de Builds/minorgems-web/ (GLUT
# que falta, portaudio sobre SDL2 audio, GLU e glBegin/glEnd, sleep, ver glut-compat.h).
#
# Saida: artifacts/build/transcend-0.3/transcend.{js,wasm,data}, que o bundle.yaml confere pelo SHA-256.

set -euo pipefail

SRC_SHA256=986093fcfc0babe4b758e77e60c633603de065b3e7c671758c37d0a1ea03a923
here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
if [ -f "$here/minorgems-web/common.sh" ]; then source "$here/minorgems-web/common.sh"; else source "$here/common.sh"; fi
mgw_init transcend

tarball="$(mgw_fetch "https://deb.debian.org/debian/pool/main/t/transcend/transcend_0.3.dfsg2.orig.tar.gz" \
  transcend_0.3.dfsg2.orig.tar.gz "$SRC_SHA256")"

out="$mgw_root/artifacts/build/transcend-0.3"
rm -rf "$out"
mkdir -p "$out/src" "$out/data"
tar xzf "$tarball" -C "$out/src" --strip-components 1
mgw_install_portaudio "$out/src"
# o Transcend inclui o portaudio pelo caminho Transcend/portaudio/ (a pasta nao vem no tarball do Debian)
mkdir -p "$out/src/Transcend/portaudio/pa_common" "$out/src/Transcend/portaudio/pablio"
cp "$mgw_compat/portaudio.h" "$out/src/Transcend/portaudio/pa_common/portaudio.h"
cp "$mgw_compat/pablio.h" "$out/src/Transcend/portaudio/pablio/pablio.h"

# As fases (o jogo le a pasta levels/ do diretorio de trabalho)
cp -R "$out/src/Transcend/levels" "$out/data/levels"

cd "$out"
mgw_flags
game="src/Transcend/game"
mg="src/minorGems"
sources=(
  $mg/graphics/openGL/ScreenGL.cpp $mg/io/linux/TypeIOLinux.cpp $mg/util/stringUtils.cpp
  $mg/util/StringBufferOutputStream.cpp $mg/io/file/linux/PathLinux.cpp $mg/system/unix/TimeUnix.cpp
  $mg/system/linux/ThreadLinux.cpp $mg/system/linux/MutexLockLinux.cpp
)
for f in game DrawableObject LevelDirectoryManager NamedColorFactory ParameterizedSpace \
  ParameterSpaceControlPoint ObjectParameterSpaceControlPoint ParameterizedObject ShipBullet \
  ShipBulletManager Enemy EnemyManager SculptureManager BossManager PortalManager SoundSamples \
  SoundPlayer ReverbSoundFilter SoundParameterSpaceControlPoint StereoSoundParameterSpaceControlPoint \
  ParameterizedStereoSound OnePointPlayableSound BulletSound MusicNoteWaveTable MusicPart MusicPlayer; do
  sources+=("$game/$f.cpp")
done
mgw_compile_all "${sources[@]}" "$mgw_compat/glut-compat.c" "$mgw_compat/pa_sdl.cpp"

em++ "${MGW_LINKFLAGS[@]}" "${MGW_OBJS[@]}" --preload-file data@/ -o transcend.js
rm -rf obj

shasum -a 256 transcend.js transcend.wasm transcend.data