Add Flatpak build

dist/linux/io.github.fgsfdsfgs.perfect_dark.desktop

@@ -0,0 +1,9 @@
+[Desktop Entry]
+Name=Perfect Dark
+Comment=Modern source port of Perfect Dark
+Exec=pd
+Icon=io.github.fgsfdsfgs.perfect_dark
+Terminal=false
+Type=Application
+Categories=Game;ActionGame;
+StartupNotify=false

dist/linux/io.github.fgsfdsfgs.perfect_dark.metainfo.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>io.github.fgsfdsfgs.perfect_dark</id>
+  <name>Perfect Dark</name>
+  <developer id="io.github.fgsfdsfgs.perfect_dark">
+    <name>Perfect Dark Contributors</name>
+    <url>https://github.com/fgsfdsfgs/perfect_dark/graphs/contributors</url>
+  </developer>
+  <launchable type="desktop-id">io.github.fgsfdsfgs.perfect_dark.desktop</launchable>
+  <summary>Modern cross-platform port of Perfect Dark</summary>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>MIT</project_license>
+  <url type="homepage">https://github.com/fgsfdsfgs/perfect_dark/</url>
+  <description>
+      <p>This is a port of Ryan Dywer's decompilation of classic N64 shooter Perfect Dark to modern systems.</p>
+  </description>
+  <!--
+  <screenshots>
+    <screenshot type="default">
+      <image type="source">https://gitlab.com/fpiesche/dxx-rebirth-assets/-/raw/c6e7e79eebe92905f84f07a635ffab5122a94bd1/d1x/screenshots/retromode.png</image>
+      <caption>"Retro mode": the default graphics setup, like the original game but in high resolution</caption>
+  <screenshots>
+  -->
+  <categories>
+    <category>Game</category>
+    <category>ActionGame</category>
+    <category>Shooter</category>
+  </categories>
+  <keywords>
+    <keyword>n64</keyword>
+    <keyword>scifi</keyword>
+    <keyword>cyberpunk</keyword>
+    <keyword>retro</keyword>
+    <keyword>sourceport</keyword>
+    <keyword>port</keyword>
+  </keywords>
+  <releases>
+    <release version="latest" date="2024-05-14"/>
+  </releases>
+  <content_rating type="oars-1.1">
+    <content_attribute id="violence-realistic">moderate</content_attribute>
+    <content_attribute id="violence-bloodshed">mild</content_attribute>
+  </content_rating>
+  <update_contact>https://github.com/fgsfdsfgs/perfect_dark/</update_contact>
+</component>

dist/linux/io.github.fgsfdsfgs.perfect_dark.py

@@ -0,0 +1,15 @@
+#!/usr/bin/python
+import argparse
+import subprocess
+
+parser = argparse.ArgumentParser()
+
+for directory in ["data", "saves", "mods"]:
+    abs_dir = os.path.join(os.environ["XDG_DATA_HOME"], directory
+    if not os.path.isdir(abs_dir):
+        os.makedirs(abs_dir)
+
+xdg_data_home = os.environ["XDG_XATA_HOME"]
+default_args = ["--basedir", f"{xdg_data_home}/data", "--savedir", f"{xdg_data_home}/saves"]
+
+subprocess.run(["pd"] + default_args)

dist/linux/io.github.fgsfdsfgs.perfect_dark.yaml

@@ -0,0 +1,93 @@
+app-id: io.github.fgsfdsfgs.perfect_dark
+runtime: org.freedesktop.Platform
+runtime-version: &runtime-version '23.08'
+sdk: org.freedesktop.Sdk
+command: io.github.fgsfdsfgs.perfect_dark.py
+
+finish-args:
+  # multiarch is required for 32bit binaries
+  - --allow=multiarch
+  # hardware 3D and controller access
+  - --device=all
+  # X11 + XShm access
+  - --share=ipc
+  - --socket=x11
+  # Audio
+  - --socket=pulseaudio
+  # Enable network for multiplayer
+  - --share=network
+
+# Parameters for 32-bit extensions
+x-gl-version: &gl-version '1.4'
+x-gl-versions: &gl-versions 23.08;1.4
+x-gl-merge-dirs: &gl-merge-dirs vulkan/icd.d;glvnd/egl_vendor.d;egl/egl_external_platform.d;OpenCL/vendors;lib/dri;lib/d3d;lib/gbm;vulkan/explicit_layer.d;vulkan/implicit_layer.d
+
+add-extensions:
+  org.freedesktop.Platform.Compat.i386:
+    directory: lib/i386-linux-gnu
+    version: '23.08'
+
+  org.freedesktop.Platform.GL32:
+    directory: lib/i386-linux-gnu/GL
+    version: *gl-version
+    versions: *gl-versions
+    subdirectories: true
+    no-autodownload: true
+    autodelete: false
+    add-ld-path: lib
+    merge-dirs: *gl-merge-dirs
+    download-if: active-gl-driver
+    enable-if: active-gl-driver
+    autoprune-unless: active-gl-driver
+
+  org.freedesktop.Platform.GL32.Debug:
+    directory: lib/debug/lib/i386-linux-gnu/GL
+    version: *gl-version
+    versions: *gl-versions
+    subdirectories: true
+    no-autodownload: true
+    merge-dirs: *gl-merge-dirs
+    enable-if: active-gl-driver
+    autoprune-unless: active-gl-driver
+
+  org.freedesktop.Platform.VAAPI.Intel.i386:
+    directory: lib/i386-linux-gnu/dri/intel-vaapi-driver
+    version: *runtime-version
+    versions: *runtime-version
+    autodelete: false
+    no-autodownload: true
+    add-ld-path: lib
+    download-if: have-intel-gpu
+    autoprune-unless: have-intel-gpu
+
+modules:
+  - name: perfect_dark
+    buildsystem: simple
+    sources:
+      - type: file
+        path: bin/pd
+      - type: file
+        path: bin/pd.jpn
+      - type: file
+        path: bin/pd.pal
+      - type: file
+        path: io.github.fgsfdsfgs.perfect_dark.py
+      - type: file
+        path: io.github.fgsfdsfgs.perfect_dark.png
+      - type: file
+        path: io.github.fgsfdsfgs.perfect_dark.metainfo.xml
+      - type: file
+        path: io.github.fgsfdsfgs.perfect_dark.desktop
+    build-commands: []
+    post-install:
+      # create extension mountpoints
+      - mkdir -p /app/lib/i386-linux-gnu
+      - mkdir -p /app/lib/i386-linux-gnu/GL
+      - mkdir -p /app/lib/debug/lib/i386-linux-gnu/GL
+      - mkdir -p /app/lib/i386-linux-gnu/dri/intel-vaapi-driver
+      # port
+      - install -Dm 755 -t /app/bin/ pd*
+      - install -Dm 644 ${FLATPAK_ID}.py /app/bin/${FLATPAK_ID}.py
+      - install -Dm 644 ${FLATPAK_ID}.desktop /app/share/applications/${FLATPAK_ID}.desktop
+      - install -Dm 644 ${FLATPAK_ID}.metainfo.xml /app/share/metainfo/${FLATPAK_ID}.metainfo.xml
+      - install -Dm 644 ${FLATPAK_ID}.png /app/share/icons/hicolor/256x256/apps/${FLATPAK_ID}.png