chore: init clean tree

.editorconfig

@@ -0,0 +1,5 @@
+[*]
+root = true
+indent_size = 4
+indent_style = tab
+insert_final_newline = true

.gitignore

@@ -0,0 +1,19 @@
+node_modules
+out
+dist
+*.tgz
+coverage
+*.lcov
+logs
+_.log
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+.eslintcache
+.cache
+*.tsbuildinfo
+.idea
+.DS_Store

.prettierignore

@@ -0,0 +1 @@
+*.sh

.prettierrc

@@ -0,0 +1,7 @@
+{
+	"trailingComma": "none",
+	"tabWidth": 4,
+	"useTabs": true,
+	"semi": true,
+	"singleQuote": false
+}

LICENSE

@@ -0,0 +1,25 @@
+MIT License
+
+Copyright (c) 2025 OCbwoy3
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+Additional Asset Disclaimer
+
+The MIT license in this repository applies only to the original source code and documentation, not the assets.

README.md

@@ -0,0 +1,26 @@
+![](asset/preview.png)
+
+# DEVICE_CONTACT
+
+greetd greeter inspired by Deltarune. For ricing purposes or similar.
+
+***LINUX ONLY***
+
+## Setup
+
+***WARNING: THIS IS NOT SECURE.*** This project is intended for Linux ricing purposes.
+It will automatically log into your account because it uses plaintext credentials WHICH ARE NOT SECURE!
+
+Put your username in `/etc/deltaboot/private/username`.
+
+Put your password in `/etc/deltaboot/private/password`.
+
+Private credentials are expected to be owned by root:
+- `/etc/deltaboot/private` - `chmod 700` - `u+rx` `(dr-x------)`
+- `/etc/deltaboot/private/*` - `chmod 600` - `u+r` `(-r--------)`
+
+## ASSETS
+
+This repo does not contain any Deltarune assets. You will need to obtain them manually.
+
+See `asset/README.md` for details.

asset/.gitignore

@@ -0,0 +1,13 @@
+font/*
+AUDIO_APPEARANCE.png
+AUDIO_ANOTHERHIM.ogg
+AUDIO_DRONE.ogg
+goner_bg_loop.mkv
+snd_menumove.wav
+snd_select.wav
+*
+!chr/
+!.gitignore
+!icon.png
+!preview.png
+!README.md

asset/README.md

@@ -0,0 +1,61 @@
+## Asset & Copyright Disclaimer
+
+This repository does **not** include any copyrighted assets from *DELTARUNE*. No game assets are distributed here.
+
+No game assets are distributed with this repository. You will need to find and extract the assets yourself, provided you bought [the game](https://store.steampowered.com/app/1671210/DELTARUNE/). (Or are using the free demo from Steam)
+
+
+*DELTARUNE* and all related assets are © Toby Fox. 
+
+This is a fan-made, non-commercial project and is not affiliated with or endorsed by the game’s creators.
+
+### Asset layout
+
+These files are not included in this repository and must be supplied by the user.
+
+```
+src/asset
+├── AUDIO_ANOTHERHIM.ogg
+├── AUDIO_APPEARANCE.wav
+├── AUDIO_DRONE.ogg
+├── bg_fountain1_0.png
+├── chr
+│   ├── kris.png
+│   ├── noelle.png
+│   ├── ralsei.png
+│   └── susie.png
+├── font
+│   ├── fnt_comicsans.png
+│   ├── fnt_dotumche.png
+│   ├── fnt_ja_comicsans.png
+│   ├── fnt_ja_dotumche.png
+│   ├── fnt_ja_mainbig.png
+│   ├── fnt_ja_main.png
+│   ├── fnt_ja_small.png
+│   ├── fnt_ja_tinynoelle.png
+│   ├── fnt_mainbig.png
+│   ├── fnt_main.png
+│   ├── fnt_small.png
+│   ├── fnt_tinynoelle.png
+│   ├── glyphs_fnt_comicsans.csv
+│   ├── glyphs_fnt_dotumche.csv
+│   ├── glyphs_fnt_ja_comicsans.csv
+│   ├── glyphs_fnt_ja_dotumche.csv
+│   ├── glyphs_fnt_ja_mainbig.csv
+│   ├── glyphs_fnt_ja_main.csv
+│   ├── glyphs_fnt_ja_small.csv
+│   ├── glyphs_fnt_ja_tinynoelle.csv
+│   ├── glyphs_fnt_mainbig.csv
+│   ├── glyphs_fnt_main.csv
+│   ├── glyphs_fnt_small.csv
+│   └── glyphs_fnt_tinynoelle.csv
+├── goner_bg_loop.mp4
+├── goner_bg.mkv
+├── icon.png
+├── IMAGE_DEPTH_0.png
+├── IMAGE_SOUL_BLUR_0.png
+├── preview.png
+├── README.md
+├── snd_menumove.wav
+└── snd_select.wav
+```

asset/chr/.gitignore

@@ -0,0 +1,5 @@
+kris.png
+noelle.png
+ralsei.png
+susie.png
+!.gitignore

build.sh

@@ -0,0 +1,4 @@
+# trap "rm -r dist" EXIT
+mkdir dist
+bun build --compile --production --outfile=dist/deltarune_device_contact ./src/index.ts
+bun build --compile --outfile=dist/deltarune_device_contact_devel ./src/index.ts

bun.lock

@@ -0,0 +1,66 @@
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+  "configVersion": 1,
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+      },
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+      },
+      "peerDependencies": {
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+      },
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+
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+
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+  }
+}

install-dev.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+INSTALL_DIR="/opt/deltabootd_DEVICE_CONTACT"
+BIN_NAME="deltarune_device_contact"
+OUT_BIN="$INSTALL_DIR/dist/$BIN_NAME"
+GREETD_CONFIG="${GREETD_CONFIG:-/etc/greetd/config.toml}"
+GREETD_USER="${GREETD_USER:-greeter}"
+BACKUP_SUFFIX="$(date +%Y%m%d%H%M%S)"
+
+log() { printf '[install] %s\n' "$*"; }
+
+command -v bun >/dev/null 2>&1 || { echo "bun is required on PATH"; exit 1; }
+
+log "Copying project to $INSTALL_DIR"
+sudo mkdir -p "$INSTALL_DIR"
+sudo rsync -a --delete \
+--exclude node_modules \
+--exclude dist \
+--exclude .git \
+"$REPO_DIR"/ "$INSTALL_DIR"/
+
+log "Installing dependencies in $INSTALL_DIR"
+sudo env -C "$INSTALL_DIR" bun install
+
+log "Installing N-API dependencies in $INSTALL_DIR"
+sudo env -C "$INSTALL_DIR" bun pm trust --all
+
+
+log "Building binary -> $OUT_BIN"
+sudo env -C "$INSTALL_DIR" bun build --compile --production --outfile="$OUT_BIN" ./src/index.ts
+sudo chmod +x "$OUT_BIN"
+
+if [[ -f "$GREETD_CONFIG" ]]; then
+    log "Backing up greetd config to ${GREETD_CONFIG}.${BACKUP_SUFFIX}.bak"
+    sudo cp "$GREETD_CONFIG" "${GREETD_CONFIG}.${BACKUP_SUFFIX}.bak"
+else
+    log "greetd config not found, creating $GREETD_CONFIG"
+    sudo mkdir -p "$(dirname "$GREETD_CONFIG")"
+fi
+
+log "Writing greetd config to launch $OUT_BIN as $GREETD_USER"
+sudo tee "$GREETD_CONFIG" >/dev/null <<EOF
+[terminal]
+vt = 1
+
+[default_session]
+command = "bash -c 'IS_CAGE=1 SDL_VIDEODRIVER=wayland cage -s -- $OUT_BIN --debug --debug-log-file=/deltaboot-debug.txt'"
+user = "root"
+EOF
+
+log "Done. Restart greetd to apply changes."

install.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+INSTALL_DIR="/opt/deltabootd_DEVICE_CONTACT"
+BIN_NAME="deltarune_device_contact"
+OUT_BIN="$INSTALL_DIR/dist/$BIN_NAME"
+GREETD_CONFIG="${GREETD_CONFIG:-/etc/greetd/config.toml}"
+GREETD_USER="${GREETD_USER:-greeter}"
+BACKUP_SUFFIX="$(date +%Y%m%d%H%M%S)"
+
+log() { printf '[install] %s\n' "$*"; }
+
+command -v bun >/dev/null 2>&1 || { echo "bun is required on PATH"; exit 1; }
+
+log "Copying project to $INSTALL_DIR"
+sudo mkdir -p "$INSTALL_DIR"
+sudo rsync -a --delete \
+--exclude node_modules \
+--exclude dist \
+--exclude .git \
+"$REPO_DIR"/ "$INSTALL_DIR"/
+
+log "Installing dependencies in $INSTALL_DIR"
+sudo env -C "$INSTALL_DIR" bun install
+
+log "Installing N-API dependencies in $INSTALL_DIR"
+sudo env -C "$INSTALL_DIR" bun pm trust --all
+
+
+log "Building binary -> $OUT_BIN"
+sudo env -C "$INSTALL_DIR" bun build --compile --production --outfile="$OUT_BIN" ./src/index.ts
+sudo chmod +x "$OUT_BIN"
+
+if [[ -f "$GREETD_CONFIG" ]]; then
+    log "Backing up greetd config to ${GREETD_CONFIG}.${BACKUP_SUFFIX}.bak"
+    sudo cp "$GREETD_CONFIG" "${GREETD_CONFIG}.${BACKUP_SUFFIX}.bak"
+else
+    log "greetd config not found, creating $GREETD_CONFIG"
+    sudo mkdir -p "$(dirname "$GREETD_CONFIG")"
+fi
+
+log "Writing greetd config to launch $OUT_BIN as $GREETD_USER"
+sudo tee "$GREETD_CONFIG" >/dev/null <<EOF
+[terminal]
+vt = 1
+
+[default_session]
+command = "bash -c 'IS_CAGE=1 SDL_VIDEODRIVER=wayland cage -s -- $OUT_BIN'"
+user = "root"
+EOF
+
+log "Done. Restart greetd to apply changes."

package.json

@@ -0,0 +1,21 @@
+{
+	"name": "device_contact",
+	"module": "src/index.ts",
+	"type": "module",
+	"private": true,
+	"license": "MIT",
+	"scripts": {
+		"start": "bun run src/index.ts",
+		"dev": "SDL_VIDEODRIVER=wayland NODE_ENV=development bun run --watch src/ui/app.ts"
+	},
+	"devDependencies": {
+		"@types/bun": "latest"
+	},
+	"peerDependencies": {
+		"typescript": "^5"
+	},
+	"dependencies": {
+		"@kmamal/sdl": "^0.11.13",
+		"@napi-rs/canvas": "^0.1.84"
+	}
+}

src/audio/decoder.ts

@@ -0,0 +1,82 @@
+import { spawn } from 'child_process'
+
+export type DecodedAudio = {
+	pcm: Buffer
+	sampleRate: number
+	channels: number
+	format: 's16'
+	bytesPerSample: number
+	bytesPerFrame: number
+	durationSeconds: number
+}
+
+export type DecodeOptions = {
+	sampleRate?: number
+	channels?: number
+}
+
+const ffmpegPath = Bun.which("ffmpeg");
+console.debug("[debug] [audio/decoder] FFmpeg installed in:", ffmpegPath);
+
+export async function decodeOggToPCM(
+	filePath: string,
+	{ sampleRate = 48_000, channels = 2 }: DecodeOptions = {},
+): Promise<DecodedAudio> {
+	console.debug("[debug] [audio/decoder] decodeOggToPCM", { filePath, sampleRate, channels })
+	const args = [
+		'-v',
+		'error',
+		'-i',
+		filePath,
+		'-f',
+		's16le',
+		'-ac',
+		String(channels),
+		'-ar',
+		String(sampleRate),
+		'pipe:1',
+	]
+
+	if (!ffmpegPath) {
+		throw "FFmpeg is not installed!"
+	}
+
+	console.debug("[debug] [audio/decoder] spawn ffmpeg", args)
+
+	const ffmpeg = spawn(ffmpegPath, args, { stdio: ['ignore', 'pipe', 'pipe'] })
+	const chunks: Buffer[] = []
+	const stderr: Buffer[] = []
+
+	ffmpeg.stdout?.on('data', (chunk: Buffer) => chunks.push(chunk))
+	ffmpeg.stderr?.on('data', (chunk: Buffer) => stderr.push(chunk))
+
+	const exitCode: number = await new Promise((resolve, reject) => {
+		ffmpeg.on('error', reject)
+		ffmpeg.on('close', resolve)
+	})
+
+	console.debug("[debug] [audio/decoder] ffmpeg exited with code", exitCode)
+
+	if (exitCode !== 0) {
+		const message = Buffer.concat(stderr).toString() || `ffmpeg exited with code ${exitCode}`
+		throw new Error(`Failed to decode audio: ${message}`)
+	}
+
+
+	const pcm = Buffer.concat(chunks)
+	const bytesPerSample = 2
+	const bytesPerFrame = channels * bytesPerSample
+	const durationSeconds = pcm.length / (bytesPerFrame * sampleRate)
+
+	console.debug("[debug] [audio/decoder] successfully decoded pcm")
+
+	return {
+		pcm,
+		sampleRate,
+		channels,
+		format: 's16',
+		bytesPerSample,
+		bytesPerFrame,
+		durationSeconds,
+	}
+}

src/audio/pitch.ts

@@ -0,0 +1,51 @@
+import type { DecodedAudio } from './decoder'
+
+export type PitchRampOptions = {
+	durationSeconds?: number
+	startRatio?: number
+	endRatio?: number
+}
+
+export function createPitchRampBuffer(
+	audio: DecodedAudio,
+	{
+		durationSeconds = 1,
+		startRatio = 0,
+		endRatio = 1.0,
+	}: PitchRampOptions = {},
+): Buffer {
+	console.debug("[debug] [audio/pitch] new PitchRampBuffer", { durationSeconds, startRatio, endRatio })
+	const totalFrames = Math.min(
+		Math.floor(durationSeconds * audio.sampleRate),
+		Math.floor(audio.pcm.length / audio.bytesPerFrame),
+	)
+
+	if (totalFrames <= 0) return Buffer.alloc(0)
+
+	const result = Buffer.alloc(totalFrames * audio.bytesPerFrame)
+	let sourcePosition = 0
+
+	for (let frame = 0; frame < totalFrames; frame++) {
+		const progress = totalFrames > 1 ? frame / (totalFrames - 1) : 1
+		const rate = startRatio + (endRatio - startRatio) * progress
+
+		const baseFrame = Math.floor(sourcePosition)
+		const nextFrame = Math.min(baseFrame + 1, Math.floor(audio.pcm.length / audio.bytesPerFrame) - 1)
+		const fraction = sourcePosition - baseFrame
+
+		for (let channel = 0; channel < audio.channels; channel++) {
+			const baseIndex = (baseFrame * audio.channels + channel) * audio.bytesPerSample
+			const nextIndex = (nextFrame * audio.channels + channel) * audio.bytesPerSample
+
+			const sampleA = audio.pcm.readInt16LE(baseIndex)
+			const sampleB = audio.pcm.readInt16LE(nextIndex)
+			const sample = sampleA + (sampleB - sampleA) * fraction
+
+			result.writeInt16LE(Math.round(sample), (frame * audio.channels + channel) * audio.bytesPerSample)
+		}
+
+		sourcePosition += rate
+	}
+
+	return result
+}

src/audio/player.ts

@@ -0,0 +1,124 @@
+import sdl, { type Sdl } from '@kmamal/sdl'
+
+import { resolveAssetPath } from '../renderer/assets'
+import { createPitchRampBuffer, type PitchRampOptions } from './pitch'
+import { decodeOggToPCM } from './decoder'
+
+export type AudioLoopOptions = {
+	sampleRate?: number
+	channels?: number
+	pitchRamp?: PitchRampOptions
+}
+
+export class AudioLoopPlayer {
+	#playbacks: Sdl.Audio.AudioPlaybackInstance[] = []
+	#firstBuffer: Buffer
+	#baseBuffer: Buffer
+	#queueCheck: ReturnType<typeof setInterval> | undefined
+	#stopped = false
+	#usedFirstFor = new WeakSet<Sdl.Audio.AudioPlaybackInstance>()
+
+	private constructor(firstBuffer: Buffer, baseBuffer: Buffer, playbacks: Sdl.Audio.AudioPlaybackInstance[]) {
+		console.debug("[debug] [audio/player] new AudioLoopPlayer")
+		playbacks.forEach((pb) => {
+			console.debug(`[debug] [audio/player] ctor: provided audio device: ${pb.device.name}`)
+		})
+		this.#firstBuffer = firstBuffer
+		this.#baseBuffer = baseBuffer
+		this.#playbacks = playbacks
+	}
+
+	static async fromAsset(relativePath: string, options: AudioLoopOptions = {}): Promise<AudioLoopPlayer> {
+		console.debug("[debug] [audio/player] fromAsset", relativePath, options)
+		const { sampleRate = 48_000, channels = 2, pitchRamp } = options
+		const assetPath = resolveAssetPath(relativePath)
+		const decoded = await decodeOggToPCM(assetPath, { sampleRate, channels })
+
+		const rampBuffer = createPitchRampBuffer(decoded, pitchRamp)
+		const replacedBytes = rampBuffer.length > 0 ? Math.min(rampBuffer.length, decoded.pcm.length) : 0
+		const tail = decoded.pcm.subarray(replacedBytes)
+		const firstBuffer = rampBuffer.length > 0 ? Buffer.concat([rampBuffer, tail]) : decoded.pcm
+		const baseBuffer = decoded.pcm
+
+		const devices = selectPlaybackDevices()
+		const playbacks = devices.map((device) =>
+			sdl.audio.openDevice(device, {
+				format: decoded.format,
+				channels: decoded.channels as 1 | 2 | 4 | 6,
+				frequency: decoded.sampleRate,
+			})
+		)
+
+		return new AudioLoopPlayer(firstBuffer, baseBuffer, playbacks)
+	}
+
+	start(): void {
+		if (this.#playbacks.length === 0) return
+		if (this.#queueCheck) clearInterval(this.#queueCheck)
+		console.debug("[debug] [audio/player] start")
+
+		this.#playbacks.forEach((pb) => pb.clearQueue())
+		this.#stopped = false
+		this.#usedFirstFor = new WeakSet()
+
+		// Prime queue for seamless start.
+		this.#playbacks.forEach((pb) => {
+			this.#enqueueNextLoop(pb)
+			this.#enqueueNextLoop(pb)
+			pb.play(true)
+		})
+
+		this.#queueCheck = setInterval(() => this.#ensureQueued(), 100)
+		this.#queueCheck.unref?.()
+	}
+
+	stop(): void {
+		console.debug("[debug] [audio/player] stop")
+		if (this.#playbacks.length === 0) return
+		this.#stopped = true
+		if (this.#queueCheck) {
+			clearInterval(this.#queueCheck)
+			this.#queueCheck = undefined
+		}
+		this.#playbacks.forEach((pb) => {
+			pb.clearQueue()
+			pb.close()
+		})
+		this.#playbacks = []
+	}
+
+	get playing(): boolean {
+		return this.#playbacks.some((pb) => pb.playing)
+	}
+
+	#enqueueNextLoop(playback: Sdl.Audio.AudioPlaybackInstance): void {
+		if (!playback) return
+		const alreadyUsedFirst = this.#usedFirstFor.has(playback)
+		const buffer = alreadyUsedFirst ? this.#baseBuffer : this.#firstBuffer
+
+		playback.enqueue(buffer)
+		this.#usedFirstFor.add(playback)
+		console.debug("[debug] [audio/player] enqueued next loop")
+	}
+
+	#ensureQueued(): void {
+		if (this.#playbacks.length === 0 || this.#stopped) return
+		const minQueueBytes = this.#baseBuffer.length * 2
+		this.#playbacks.forEach((pb) => {
+			while (pb.queued < minQueueBytes) {
+				this.#enqueueNextLoop(pb)
+			}
+		})
+	}
+}
+
+function selectPlaybackDevices(): Sdl.Audio.PlaybackDevice[] {
+	const playbackDevices = sdl.audio.devices.filter(
+		(d): d is Sdl.Audio.PlaybackDevice => d.type === 'playback'
+	)
+
+	if (playbackDevices.length > 0) return playbackDevices
+
+	// last resort
+	return [{ type: 'playback' }]
+}

src/bootsequence/dia.ts

@@ -0,0 +1,156 @@
+type ResolvableText = string | ((answers: Record<string, string>) => string);
+
+type Question = {
+	t: "q",
+	text: ResolvableText,
+	answers: {
+		text: string,
+		value: string
+	}[],
+	id: string
+}
+
+type Dia = {
+	t: "d",
+	text: ResolvableText
+}
+
+type Wai = {
+	t: "w",
+	time: number
+}
+
+type Fun = {
+	t: "f",
+	f: () => any
+}
+
+type chrt = "kris" | "susie" | "ralsei" | "noelle"
+type desktopt = "hyprland" | "plasma"
+
+let chr: chrt = "kris";
+let desktop: desktopt = "hyprland";
+
+export function setChar(newchr: chrt) {
+	chr = newchr;
+}
+
+export function setDesktop(newdesktop: desktopt) {
+	desktop = newdesktop;
+}
+
+// TODO: Work on this a bit more
+export const QUESTIONS: (Question | Dia | Wai | Fun)[] = [
+	{
+		t: "w",
+		time: 4000
+	},
+	{
+		t: "q",
+		id: "char",
+		text: "SELECT THE VESSEL YOU PREFER.",
+		answers: [
+			{
+				text: "RALSEI",
+				value: "ralsei"
+			},
+			{
+				text: "SUSIE",
+				value: "susie"
+			},
+			{
+				text: "KRIS",
+				value: "kris"
+			},
+			{
+				text: "NOELLE",
+				value: "noelle"
+			}
+		]
+	},
+	{
+		t: "d",
+		text: "YOU HAVE CHOSEN A WONDERFUL FORM."
+	},
+	{
+		t: "d",
+		text: () => `NOW LET US SHAPE ${(["noelle", "susie"]).includes(chr) ? "HER" : chr === "ralsei" ? "HIS" : "THEIR"} MIND AS YOUR OWN.`
+	},
+	{
+		t: "q",
+		id: "desktop",
+		text: () => `WHAT IS ${(["noelle", "susie"]).includes(chr) ? "HER" : chr === "ralsei" ? "HIS" : "THEIR"} FAVORITE DESKTOP ENVIRONMENT?`,
+		answers: [
+			{
+				text: "HYPRLAND",
+				value: "hyprland"
+			},
+			{
+				text: "KDE",
+				value: "plasma"
+			}
+		]
+	},
+	{
+		t: "d",
+		text: () => `${desktop === "hyprland" ? "HYPRLAND" : "KDE"}, INTERESTING CHOICE..`
+	},
+	{
+		t: "q",
+		id: "color",
+		text: "YOUR FAVORITE COLOR PALETTE?",
+		answers: [
+			{
+				text: "LATTE",
+				value: "latte"
+			},
+			{
+				text: "FRAPPE",
+				value: "frappe"
+			},
+			{
+				text: "MACCHIATO",
+				value: "macchiato"
+			},
+			{
+				text: "MOCHA",
+				value: "mocha"
+			}
+		]
+	},
+	{
+		t: "q",
+		id: "gift",
+		text: () => `PLEASE GIVE ${(["noelle", "susie"]).includes(chr) ? "HER" : chr === "ralsei" ? "HIM" : "THEM"} A GIFT.`,
+		answers: [
+			{
+				text: "KINDNESS",
+				value: "kindness"
+			},
+			{
+				text: "MIND",
+				value: "mind"
+			},
+			{
+				text: "AMBITION",
+				value: "ambition"
+			},
+			{
+				text: "BRAVERY",
+				value: "bravery"
+			}
+		]
+	},
+	{
+		t: "d",
+		text: "THANK YOU FOR YOUR TIME."
+	},
+	{
+		t: "d",
+		text: () => `YOUR WONDERFUL CREATION, ${chr.toUpperCase()}`
+	},
+	{
+		t: "d",
+		text: "WILL NOW BE"
+	}
+]

src/bootsequence/font.ts

@@ -0,0 +1,216 @@
+import fs from "fs";
+import { type CanvasRenderingContext2D, type Image } from "@napi-rs/canvas";
+import { loadImageAsset, resolveAssetPath } from "../renderer/assets";
+
+type Glyph = {
+	x: number;
+	y: number;
+	w: number;
+	h: number;
+	shift: number;
+	offset: number;
+};
+
+export type GlyphMap = Map<number, Glyph>;
+
+export type BitmapFont = {
+	atlas: Image;
+	glyphs: GlyphMap;
+	lineHeight: number;
+};
+
+function loadGlyphs(csvRelativePath: string): GlyphMap {
+	const csvPath = resolveAssetPath(csvRelativePath);
+	const raw = fs.readFileSync(csvPath, "utf8");
+	const lines = raw.split(/\r?\n/).filter((l) => l.trim().length > 0);
+	const glyphs: GlyphMap = new Map();
+
+	for (let i = 1; i < lines.length; i++) {
+		const parts = lines[i]!.split(";");
+		if (parts.length < 7) continue;
+
+		const [
+			charCodeStr,
+			xStr,
+			yStr,
+			wStr,
+			hStr,
+			shiftStr,
+			offsetStr
+		] = parts;
+
+		const code = Number(charCodeStr);
+		const glyph: Glyph = {
+			x: Number(xStr),
+			y: Number(yStr),
+			w: Number(wStr),
+			h: Number(hStr),
+			shift: Number(shiftStr),
+			offset: Number(offsetStr)
+		};
+
+		if (Number.isFinite(code)) glyphs.set(code, glyph);
+	}
+
+	return glyphs;
+}
+
+function computeLineHeight(glyphs: GlyphMap): number {
+	let maxHeight = 0;
+	for (const glyph of glyphs.values()) {
+		if (glyph.h > maxHeight) maxHeight = glyph.h;
+	}
+	return maxHeight + 4;
+}
+
+export async function loadBitmapFont(
+	atlasRelativePath = "font/fnt_main.png",
+	glyphsRelativePath = "font/glyphs_fnt_main.csv"
+): Promise<BitmapFont> {
+	const glyphs = loadGlyphs(glyphsRelativePath);
+	const lineHeight = computeLineHeight(glyphs);
+	const atlas = await loadImageAsset(atlasRelativePath);
+	return { atlas, glyphs, lineHeight };
+}
+
+type DrawOptions = {
+	align?: "left" | "center";
+	color?: string;
+	alpha?: number;
+	scale?: number; // <— TEXT SCALE
+};
+
+function normScale(scale: number | undefined): number {
+	const s = scale ?? 1;
+	return Number.isFinite(s) && s > 0 ? s : 1;
+}
+
+export function measureTextWidth(
+	text: string,
+	font: BitmapFont,
+	options: Pick<DrawOptions, "scale"> = {}
+): number {
+	const scale = normScale(options.scale);
+	let width = 0;
+	for (const ch of text) {
+		const glyph = font.glyphs.get(ch.codePointAt(0) ?? 0);
+		width += (glyph?.shift ?? 0) * scale;
+	}
+	return width;
+}
+
+export function drawBitmapText(
+	ctx: CanvasRenderingContext2D,
+	font: BitmapFont,
+	text: string,
+	x: number,
+	y: number,
+	options: DrawOptions = {}
+): void {
+	const { atlas, glyphs, lineHeight } = font;
+	const align = options.align ?? "left";
+	const color = options.color;
+	const alpha = options.alpha ?? 1;
+	const scale = normScale(options.scale);
+
+	let cursor = x;
+	if (align === "center") {
+		cursor = x - measureTextWidth(text, font, { scale }) / 2;
+	}
+
+	const previousAlpha = ctx.globalAlpha;
+	ctx.globalAlpha = previousAlpha * alpha;
+
+	const startX = cursor;
+
+	for (const ch of text) {
+		const glyph = glyphs.get(ch.codePointAt(0) ?? 0);
+		if (!glyph) {
+			cursor += 8 * scale;
+			continue;
+		}
+
+		(ctx as any).drawImage(
+			atlas as any,
+			glyph.x,
+			glyph.y,
+			glyph.w,
+			glyph.h,
+			cursor + glyph.offset * scale,
+			y,
+			glyph.w * scale,
+			glyph.h * scale
+		);
+
+		cursor += glyph.shift * scale;
+	}
+
+	if (color && color.toLowerCase() !== "white") {
+		const width = cursor - startX;
+		ctx.save();
+		ctx.globalAlpha = previousAlpha * alpha;
+		ctx.globalCompositeOperation = "source-atop";
+		ctx.fillStyle = color;
+		ctx.fillRect(startX, y, width, lineHeight * scale);
+		ctx.restore();
+	}
+
+	ctx.globalAlpha = previousAlpha;
+}
+
+export function drawBitmapTextPerGlyph(
+	ctx: CanvasRenderingContext2D,
+	font: BitmapFont,
+	text: string,
+	startX: number,
+	y: number,
+	options: DrawOptions = {}
+): void {
+	const { atlas, glyphs } = font;
+	const color = options.color;
+	const alpha = options.alpha ?? 1;
+	const scale = normScale(options.scale);
+
+	let cursor = startX;
+
+	const previousAlpha = ctx.globalAlpha;
+	ctx.globalAlpha = previousAlpha * alpha;
+
+	for (const ch of text) {
+		const glyph = glyphs.get(ch.codePointAt(0) ?? 0);
+		if (!glyph) {
+			cursor += 8 * scale;
+			continue;
+		}
+
+		(ctx as any).drawImage(
+			atlas as any,
+			glyph.x,
+			glyph.y,
+			glyph.w,
+			glyph.h,
+			cursor + glyph.offset * scale,
+			y,
+			glyph.w * scale,
+			glyph.h * scale
+		);
+
+		if (color && color.toLowerCase() !== "white") {
+			ctx.save();
+			ctx.globalAlpha = previousAlpha * alpha;
+			ctx.globalCompositeOperation = "source-atop";
+			ctx.fillStyle = color;
+			ctx.fillRect(
+				cursor + glyph.offset * scale,
+				y,
+				glyph.w * scale,
+				glyph.h * scale
+			);
+			ctx.restore();
+		}
+
+		cursor += glyph.shift * scale;
+	}
+
+	ctx.globalAlpha = previousAlpha;
+}

src/bootsequence/questions.ts

@@ -0,0 +1,466 @@
+import sdl from "@kmamal/sdl";
+import { type CanvasRenderingContext2D, type Image } from "@napi-rs/canvas";
+
+import { loadImageAsset } from "../renderer/assets";
+import { type BitmapFont, drawBitmapTextPerGlyph, loadBitmapFont, measureTextWidth } from "./font";
+import { QUESTIONS, setChar, setDesktop } from "./dia";
+import { homedir } from "os";
+import { join } from "path";
+import { writeFileSync } from "fs";
+
+type ResolvableText = string | ((answers: Record<string, string>) => string);
+type BootsequenceAnswerKey = keyof BootsequenceAnswers;
+
+type QuestionAnswer = {
+	text: string;
+	value: string;
+};
+
+type QuestionEntry = {
+	t: "q";
+	id: string;
+	text: ResolvableText;
+	answers: QuestionAnswer[];
+};
+
+type DialogueEntry = {
+	t: "d";
+	text: ResolvableText;
+};
+
+type FunctionEntry = {
+	t: "f",
+	f: () => any
+}
+
+type WaitEntry = {
+	t: "w";
+	time: number;
+};
+
+type SequenceEntry = QuestionEntry | DialogueEntry | WaitEntry | FunctionEntry;
+
+const TYPEWRITER_SPEED = 16; // chars/s
+const DIALOGUE_HOLD_MS = 1200;
+const HEART_SCALE = 1.1;
+const TYPEWRITER_DISABLED = false;
+const ANSWER_FADE_MS = 220;
+const BLUR_OFFSETS = [
+	[-1, 0],
+	[1, 0],
+	[0, -1],
+	[0, 1]
+] as const;
+
+type KeyInput = {
+	key: string | null;
+	scancode: number;
+	ctrl: number;
+	shift: number;
+	alt: number;
+	super: number;
+};
+
+import type { BootsequenceAnswers } from "../types";
+
+export type BootSequenceUI = {
+	update: (deltaMs: number) => void;
+	render: (ctx: CanvasRenderingContext2D) => void;
+	handleKey: (input: KeyInput) => void;
+	isFinished: () => boolean;
+	getAnswers: () => BootsequenceAnswers;
+};
+
+function wrapLines(text: string, font: BitmapFont, maxWidth: number): string[] {
+	const tokens = text.split(/(\s+)/);
+	const lines: string[] = [];
+	let current = "";
+
+	for (const token of tokens) {
+		const next = current + token;
+		if (measureTextWidth(next.trimEnd(), font) <= maxWidth) {
+			current = next;
+			continue;
+		}
+		if (current.trim().length > 0) {
+			lines.push(current.trimEnd());
+		}
+		current = token.trimStart();
+	}
+
+	if (current.trim().length > 0) {
+		lines.push(current.trimEnd());
+	}
+
+	if (lines.length === 0) return [text];
+	return lines;
+}
+
+export async function createBootSequenceUI(
+	baseWidth: number,
+	baseHeight: number
+): Promise<BootSequenceUI> {
+	const questionFont = await loadBitmapFont();
+	const answerFont = await loadBitmapFont();
+	const heart = await loadImageAsset("IMAGE_SOUL_BLUR_0.png");
+	const CHARACTER_IDS = ["ralsei", "susie", "kris", "noelle"] as const;
+	type CharacterId = (typeof CHARACTER_IDS)[number];
+	const characterSprites: Record<CharacterId, Image> = {
+		ralsei: await loadImageAsset("chr/ralsei.png"),
+		susie: await loadImageAsset("chr/susie.png"),
+		kris: await loadImageAsset("chr/kris.png"),
+		noelle: await loadImageAsset("chr/noelle.png")
+	};
+	const isCharacterId = (value: string | undefined): value is CharacterId =>
+		CHARACTER_IDS.includes(value as CharacterId);
+
+	let currentIndex = 0;
+	let visibleChars = 0;
+	let selection = 0;
+	let finished = false;
+	const answers: BootsequenceAnswers = {
+		char: "",
+		desktop: "",
+		color: "",
+		gift: ""
+	};
+	let dialogueHold = 0;
+	let loggedCompletion = false;
+	const textCache = new WeakMap<SequenceEntry, string>();
+	const graphemeCache = new WeakMap<SequenceEntry, string[]>();
+	let waitElapsed = 0;
+	let answerAlpha = 0;
+	const lineCache = new WeakMap<SequenceEntry, string[]>();
+
+	const currentEntry = (): SequenceEntry | FunctionEntry | undefined => QUESTIONS[currentIndex];
+	const resolveText = (entry: QuestionEntry | DialogueEntry): string => {
+		const cached = textCache.get(entry);
+		if (cached) return cached;
+		const rawText = entry.text;
+		const resolved = typeof rawText === "function" ? rawText(answers) : rawText;
+		textCache.set(entry, resolved);
+		return resolved;
+	};
+	const graphemesForEntry = (entry: SequenceEntry | undefined): string[] => {
+		if (!entry) return [];
+		if (entry.t === "w") return [];
+		if (entry.t === "f") return [];
+		const cached = graphemeCache.get(entry);
+		if (cached) return cached;
+		const graphemes = Array.from(resolveText(entry));
+		graphemeCache.set(entry, graphemes);
+		return graphemes;
+	};
+	const linesForEntry = (entry: SequenceEntry): string[] => {
+		if (entry.t === "w") return [];
+		if (entry.t === "f") return [];
+		const cached = lineCache.get(entry);
+		if (cached) return cached;
+		const lines = wrapLines(resolveText(entry), questionFont, baseWidth * 0.9);
+		lineCache.set(entry, lines);
+		return lines;
+	};
+	const resetForEntry = () => {
+		visibleChars = 0;
+		selection = 0;
+		dialogueHold = 0;
+		waitElapsed = 0;
+		answerAlpha = 0;
+	};
+
+	const advance = () => {
+		currentIndex += 1;
+		if (currentIndex >= QUESTIONS.length) {
+			finished = true;
+		} else {
+			resetForEntry();
+		}
+	};
+
+	const skipTypewriter = () => {
+		const entry = currentEntry();
+		if (!entry) return;
+		if (entry.t === "w") {
+			waitElapsed = entry.time;
+			return;
+		}
+		if (entry.t === "f") {
+			entry.f();
+			return;
+		}
+		visibleChars = graphemesForEntry(entry).length;
+	};
+
+	const handleConfirm = () => {
+		const entry = currentEntry();
+		if (!entry) return;
+		if (entry.t === "f") {
+			advance();
+			return;
+		}
+		const fullyRevealed =
+			entry.t === "w" ? waitElapsed >= entry.time : visibleChars >= graphemesForEntry(entry).length;
+		if (!fullyRevealed) {
+			skipTypewriter();
+			return;
+		}
+		if (entry.t === "d") {
+			advance();
+			return;
+		}
+		if (entry.t === "w") {
+			advance();
+			return;
+		}
+		const picked = entry.answers[selection];
+		if (picked) {
+			if (isAnswerKey(entry.id)) {
+				answers[entry.id] = picked.value;
+			}
+			if (entry.id === "char" && isCharacterId(picked.value)) {
+				setChar(picked.value);
+			}
+			if (entry.id === "desktop") {
+				setDesktop(picked.value as any);
+			}
+			console.debug(`[debug] [bootsequence/questions] answer ${entry.id}: ${picked.value} (${picked.text})`);
+		}
+		advance();
+	};
+
+	const handleMove = (dir: -1 | 1) => {
+		const entry = currentEntry();
+		if (!entry || entry.t !== "q") return;
+		const fullyRevealed = visibleChars >= graphemesForEntry(entry).length;
+		if (!fullyRevealed) return;
+		const next = (selection + dir + entry.answers.length) % entry.answers.length;
+		selection = next;
+	};
+
+	const update = (deltaMs: number) => {
+		if (finished) {
+			console.debug("[debug] [bootsequence/questions] finish", deltaMs, finished, loggedCompletion)
+			if (!loggedCompletion) {
+				loggedCompletion = true;
+				console.info("[debug] [bootsequence/questions] finished questions", answers);
+				writeFileSync(join(homedir(), ".deltaboot.json"), JSON.stringify(answers))
+			}
+			return;
+		}
+		const entry = currentEntry();
+		if (!entry) return;
+		if (entry.t === "w") {
+			waitElapsed += deltaMs;
+			if (waitElapsed >= entry.time) advance();
+			return;
+		}
+		if (entry.t === "f") {
+			entry.f();
+			return;
+		}
+		const totalGraphemes = graphemesForEntry(entry).length;
+		if (TYPEWRITER_DISABLED) {
+			visibleChars = totalGraphemes;
+		} else {
+			const step = (deltaMs / 1000) * TYPEWRITER_SPEED;
+			visibleChars = Math.min(totalGraphemes, visibleChars + step);
+		}
+		const fullyRevealed = visibleChars >= totalGraphemes;
+		if (entry.t === "d" && fullyRevealed) {
+			dialogueHold += deltaMs;
+			if (dialogueHold >= DIALOGUE_HOLD_MS) {
+				advance();
+			}
+		}
+		const targetAlpha =
+			entry.t === "q" && fullyRevealed
+				? 1
+				: 0;
+		const delta = deltaMs / ANSWER_FADE_MS;
+		if (targetAlpha > answerAlpha) {
+			answerAlpha = Math.min(targetAlpha, answerAlpha + delta);
+		} else {
+			answerAlpha = Math.max(targetAlpha, answerAlpha - delta);
+		}
+	};
+
+	const renderQuestionText = (ctx: CanvasRenderingContext2D, entry: SequenceEntry) => {
+		const graphemes = graphemesForEntry(entry);
+		const visibleCount = Math.floor(visibleChars);
+		const linesFull = linesForEntry(entry);
+		let remaining = visibleCount;
+		const startX = baseWidth * 0.08;
+		const startY = baseHeight * 0.04;
+
+		for (let i = 0; i < linesFull.length; i++) {
+			const fullLine = linesFull[i] ?? "";
+			const lineGraphemes = Array.from(fullLine);
+			const take = Math.max(0, Math.min(lineGraphemes.length, remaining));
+			remaining = Math.max(0, remaining - take);
+			const line = lineGraphemes.slice(0, take).join("");
+			const y = startY + i * questionFont.lineHeight;
+
+			let cursor = startX;
+			for (const ch of line) {
+				const glyph = questionFont.glyphs.get(ch.codePointAt(0) ?? 0);
+				const glyphWidth = glyph?.shift ?? 8;
+				const drawX = cursor + (glyph?.offset ?? 0);
+
+				ctx.save();
+				ctx.globalAlpha = 0.3;
+				for (const [ox, oy] of BLUR_OFFSETS) {
+					drawBitmapTextPerGlyph(ctx, questionFont, ch, (drawX + ox), (y + oy) - 15, { align: "left" });
+				}
+				ctx.restore();
+
+				drawBitmapTextPerGlyph(ctx, questionFont, ch, drawX, y - 15, { align: "left" });
+
+				cursor += glyphWidth;
+			}
+		}
+	};
+
+	const renderAnswers = (
+		ctx: CanvasRenderingContext2D,
+		answersList: QuestionAnswer[],
+		visible: boolean
+	) => {
+		if (!visible && answerAlpha <= 0) return;
+		const startX = baseWidth * 0.28;
+		const startY = baseHeight * 0.45;
+		const alpha = answerAlpha;
+		for (let i = 0; i < answersList.length; i++) {
+			const answer = answersList[i]!;
+			const y = startY + i * answerFont.lineHeight * 1.1;
+			const isActive = i === selection;
+			const color = "white";
+			let cursor = startX;
+			ctx.save();
+			ctx.globalAlpha = alpha;
+			for (const ch of answer.text) {
+				const glyph = answerFont.glyphs.get(ch.codePointAt(0) ?? 0);
+				const glyphWidth = glyph?.shift ?? 8;
+				const drawX = cursor + (glyph?.offset ?? 0);
+
+				ctx.save();
+				ctx.globalAlpha = alpha * 0.3;
+				for (const [ox, oy] of BLUR_OFFSETS) {
+					drawBitmapTextPerGlyph(ctx, answerFont, ch, (drawX + ox) - 30, y + oy, { align: "left" });
+				}
+				ctx.restore();
+
+				drawBitmapTextPerGlyph(ctx, answerFont, ch, drawX - 30, y, { align: "left" });
+				cursor += glyphWidth;
+			}
+			ctx.restore();
+			if (isActive) {
+				const heartX = startX - heart.width * HEART_SCALE - 12;
+				const heartY = y - heart.height * HEART_SCALE * 0.2;
+				ctx.save();
+				ctx.globalAlpha = alpha;
+				drawHeart(ctx, heart, heartX - 25, heartY + 2);
+				ctx.restore();
+			}
+		}
+	};
+
+	const renderDialogue = (ctx: CanvasRenderingContext2D, entry: DialogueEntry) => {
+		renderQuestionText(ctx, entry);
+	};
+
+	const renderCharacterPreview = (ctx: CanvasRenderingContext2D, character: CharacterId) => {
+		const sprite = characterSprites[character];
+		if (!sprite) return;
+		const maxWidth = baseWidth * 0.35;
+		const maxHeight = baseHeight * 0.55;
+		const scale = Math.min(2, Math.min(maxWidth / sprite.width, maxHeight / sprite.height));
+		const drawWidth = sprite.width * scale;
+		const drawHeight = sprite.height * scale;
+		const drawX = (baseWidth - drawWidth) / 2;
+		const drawY = (baseHeight - drawHeight) / 2;
+
+		ctx.save();
+		ctx.globalAlpha = 0.9;
+		(ctx as any).drawImage(sprite, drawX + 30, drawY + 30, drawWidth, drawHeight);
+		ctx.restore();
+	};
+
+	const render = (ctx: CanvasRenderingContext2D) => {
+		if (finished) return;
+		const entry = currentEntry();
+		if (!entry) return;
+		const selectedChar = answers["char"];
+		const showCharacter =
+			entry.t === "q" && entry.id === "char" && visibleChars >= graphemesForEntry(entry).length
+				? entry.answers[selection]?.value
+				: selectedChar;
+		if (isCharacterId(showCharacter)) {
+			renderCharacterPreview(ctx, showCharacter);
+		}
+		if (entry.t === "w") return;
+		if (entry.t === "f") return;
+		if (entry.t === "d") {
+			renderDialogue(ctx, entry);
+		} else {
+			renderQuestionText(ctx, entry);
+			const fullyRevealed = visibleChars >= graphemesForEntry(entry).length;
+			renderAnswers(ctx, entry.answers, fullyRevealed);
+		}
+	};
+
+	const handleKey = (input: KeyInput) => {
+		if (finished) return;
+		const key = (input.key ?? "").toLowerCase();
+		const sc = input.scancode;
+		const ctrlHeld = input.ctrl > 0 || key === "control" || key === "ctrl";
+
+		if (ctrlHeld) {
+			skipTypewriter();
+			return;
+		}
+
+		if (
+			key === "arrowup" ||
+			key === "up" ||
+			sc === sdl.keyboard.SCANCODE.UP
+		) {
+			handleMove(-1);
+			return;
+		}
+		if (
+			key === "arrowdown" ||
+			key === "down" ||
+			sc === sdl.keyboard.SCANCODE.DOWN
+		) {
+			handleMove(1);
+			return;
+		}
+		if (
+			key === "enter" ||
+			key === "return" ||
+			key === "z" ||
+			sc === sdl.keyboard.SCANCODE.RETURN ||
+			sc === sdl.keyboard.SCANCODE.SPACE
+		) {
+			handleConfirm();
+		}
+	};
+
+	return {
+		update,
+		render,
+		handleKey,
+		isFinished: () => finished,
+		getAnswers: () => ({ ...answers })
+	};
+}
+
+function isAnswerKey(value: string): value is BootsequenceAnswerKey {
+	return value === "char" || value === "desktop" || value === "color" || value === "gift";
+}
+
+function drawHeart(ctx: CanvasRenderingContext2D, heart: Image, x: number, y: number): void {
+	ctx.save();
+	(ctx as any).drawImage(heart, x, y, heart.width * HEART_SCALE, heart.height * HEART_SCALE);
+	ctx.restore();
+}

src/config.ts

@@ -0,0 +1,40 @@
+import { readFileSync } from "node:fs";
+
+const PASSWORD_PATH = "/etc/deltaboot/private/password";
+const USERNAME_PATH = "/etc/deltaboot/private/username";
+
+/**
+ * Private credentials are expected to be owned by root:
+ * /etc/deltaboot/private -root 700 (dr-x------)
+ * /etc/deltaboot/private/* - root 600 (-r--------)
+ */
+
+export function getDefaultPassword(): string {
+	try {
+		return readFileSync(PASSWORD_PATH, "utf8").trim();
+	} catch (error) {
+		if (isIgnorableFsError(error)) {
+			return "";
+		}
+		console.warn(`[config] failed to read default password from ${PASSWORD_PATH}`, error);
+		return "";
+	}
+}
+
+export function getDefaultUser(): string {
+	try {
+		const value = readFileSync(USERNAME_PATH, "utf8").trim();
+		return value || "ralsei";
+	} catch (error) {
+		if (isIgnorableFsError(error)) {
+			return "ralsei";
+		}
+		console.warn(`[config] failed to read default user from ${USERNAME_PATH}`, error);
+		return "ralsei";
+	}
+}
+
+function isIgnorableFsError(error: unknown): error is { code?: string } {
+	const code = (error as { code?: string } | undefined)?.code;
+	return code === "ENOENT" || code === "EACCES";
+}

src/desktop.ts

@@ -0,0 +1,47 @@
+import { getDefaultPassword, getDefaultUser } from "./config";
+import { GreetdClient } from "./lib/greetd";
+
+export const GREETD_SOCKET = process.env.GREETD_SOCK ?? "/run/dummy-greetd.sock";
+const KNOWN_SESSIONS: Record<string, string> = {
+	hyprland: "Hyprland",
+	plasma: "startplasma-wayland"
+};
+const GREETD_TIMEOUT_MS = Number(process.env.GREETD_TIMEOUT_MS ?? 5_000);
+
+export async function handoffToGreetd(desktopHint?: string): Promise<void> {
+	console.debug("[desktop] starting greetd handoff", {
+		socket: GREETD_SOCKET,
+		desktopHint
+	});
+	const username =
+		process.env.GREETD_USERNAME ??
+		getDefaultUser() ??
+		process.env.USER ??
+		"greeter";
+	const password = getDefaultPassword();
+	const sessionCommand = resolveSessionCommand(desktopHint);
+
+	console.debug("[desktop] using credentials", { username, sessionCommand });
+	const client = new GreetdClient({ ipcSocketPath: GREETD_SOCKET, timeoutMs: GREETD_TIMEOUT_MS });
+	await client.login({
+		username,
+		password,
+		cmd: sessionCommand,
+		env: []
+	});
+}
+
+function resolveSessionCommand(desktopHint?: string): string {
+	const candidate =
+		desktopHint ??
+		process.env.DESKTOP_SESSION_FRIENDLY_NAME ??
+		process.env.XDG_CURRENT_DESKTOP ??
+		"";
+	const normalized = candidate.trim().toLowerCase();
+	const mapped = KNOWN_SESSIONS[normalized];
+	if (mapped) return mapped;
+	if (!candidate.trim()) {
+		throw new Error("No desktop session hint available for greetd handoff");
+	}
+	return candidate.trim();
+}

src/index.ts

@@ -0,0 +1,3 @@
+import { runDeviceContactUI } from "./ui/app";
+
+await runDeviceContactUI();

src/intro/text-layer.ts

@@ -0,0 +1,174 @@
+import fs from "fs";
+
+import {
+	createCanvas,
+	type Canvas,
+	type CanvasRenderingContext2D,
+	type Image
+} from "@napi-rs/canvas";
+
+import { loadImageAsset, resolveAssetPath } from "../renderer/assets";
+
+type Glyph = {
+	x: number;
+	y: number;
+	w: number;
+	h: number;
+	shift: number;
+	offset: number;
+};
+
+type GlyphMap = Map<number, Glyph>;
+
+const FONT_ATLAS_PATH = "font/fnt_main.png";
+const FONT_GLYPHS_PATH = "font/glyphs_fnt_main.csv";
+const BLUR_SCALE = 1;
+const BLUR_RADIUS = 2;
+
+function loadGlyphs(): GlyphMap {
+	const csvPath = resolveAssetPath(FONT_GLYPHS_PATH);
+	const raw = fs.readFileSync(csvPath, "utf8");
+	const lines = raw.split(/\r?\n/).filter((l) => l.trim().length > 0);
+	const glyphs: GlyphMap = new Map();
+
+	// First line is metadata; skip it.
+	for (let i = 1; i < lines.length; i++) {
+		const parts = lines[i]!.split(";");
+		if (parts.length < 7) continue;
+		const [
+			charCodeStr,
+			xStr,
+			yStr,
+			wStr,
+			hStr,
+			shiftStr,
+			offsetStr
+		] = parts;
+
+		const code = Number(charCodeStr);
+		const glyph: Glyph = {
+			x: Number(xStr),
+			y: Number(yStr),
+			w: Number(wStr),
+			h: Number(hStr),
+			shift: Number(shiftStr),
+			offset: Number(offsetStr)
+		};
+		if (Number.isFinite(code)) glyphs.set(code, glyph);
+	}
+
+	return glyphs;
+}
+
+function computeLineHeight(glyphs: GlyphMap): number {
+	let maxHeight = 0;
+	for (const glyph of glyphs.values()) {
+		if (glyph.h > maxHeight) maxHeight = glyph.h;
+	}
+	return maxHeight + 4; // seperation between lines
+}
+
+function measureTextWidth(text: string, glyphs: GlyphMap): number {
+	let width = 0;
+	for (const ch of text) {
+		const glyph = glyphs.get(ch.codePointAt(0) ?? 0);
+		width += glyph?.shift ?? 0;
+	}
+	return width;
+}
+
+function drawBitmapText(
+	ctx: CanvasRenderingContext2D,
+	text: string,
+	atlas: Image,
+	glyphs: GlyphMap,
+	x: number,
+	y: number
+): void {
+	let cursor = x;
+	for (const ch of text) {
+		const glyph = glyphs.get(ch.codePointAt(0) ?? 0);
+		if (!glyph) {
+			cursor += 8; // missing glyph?
+			continue;
+		}
+		(ctx as any).drawImage(
+			atlas as any,
+			glyph.x,
+			glyph.y,
+			glyph.w,
+			glyph.h,
+			cursor + glyph.offset,
+			y,
+			glyph.w,
+			glyph.h
+		);
+		cursor += glyph.shift;
+	}
+}
+
+export type IntroTextLayer = {
+	canvas: Canvas;
+	redraw: (text: string) => void;
+};
+
+export async function createIntroTextLayer(
+	width: number,
+	height: number,
+	initialText: string
+): Promise<IntroTextLayer> {
+	const glyphs = loadGlyphs();
+	const lineHeight = computeLineHeight(glyphs);
+	const atlas = await loadImageAsset(FONT_ATLAS_PATH);
+	const canvas = createCanvas(width, height); // final composite
+	const ctx = canvas.getContext("2d");
+	const textCanvas = createCanvas(width, height); // crisp text only
+	const textCtx = textCanvas.getContext("2d");
+
+	const blurCanvas = createCanvas(
+		Math.max(1, Math.round(width * BLUR_SCALE)),
+		Math.max(1, Math.round(height * BLUR_SCALE))
+	);
+	const blurCtx = blurCanvas.getContext("2d");
+
+	const redraw = (text: string) => {
+		textCtx.clearRect(0, 0, width, height);
+		textCtx.imageSmoothingEnabled = false;
+		blurCtx.clearRect(0, 0, blurCanvas.width, blurCanvas.height);
+
+		const lines = text.split(/\r?\n/);
+		const totalHeight = lines.length * lineHeight;
+		const startY = (height - totalHeight) / 2;
+
+		for (let i = 0; i < lines.length; i++) {
+			const line = lines[i] ?? "";
+			const textWidth = measureTextWidth(line, glyphs);
+			const x = (width - textWidth) / 2;
+			const y = startY + i * lineHeight;
+			drawBitmapText(textCtx, line, atlas, glyphs, x, y);
+		}
+
+		// Pixelated blur: downscale the text, blur at the lower resolution, upscale without smoothing.
+		blurCtx.imageSmoothingEnabled = false;
+		blurCtx.filter = `blur(${BLUR_RADIUS}px)`;
+		blurCtx.drawImage(
+			textCanvas as any,
+			0,
+			0,
+			blurCanvas.width,
+			blurCanvas.height
+		);
+		blurCtx.filter = "none";
+
+		ctx.clearRect(0, 0, width, height);
+		ctx.imageSmoothingEnabled = false;
+		ctx.globalAlpha = 0.9;
+		ctx.drawImage(blurCanvas as any, 0, 0, width, height);
+		ctx.globalAlpha = 1;
+		ctx.drawImage(textCanvas as any, 0, 0, width, height);
+	};
+
+	redraw(initialText);
+
+	return { canvas, redraw };
+}

src/lib/greetd.ts

@@ -0,0 +1,260 @@
+import net from "node:net";
+import os from "node:os";
+
+export interface GreetdLoginOptions {
+	username: string;
+	password: string;
+	cmd: string | string[];
+	env?: string[];
+}
+
+export const GREETD_IPC_SOCKET_PATH_ENV_NAME = "GREETD_SOCK";
+
+export type AuthenticationMsgType = "visible" | "secret" | "info" | "error";
+export type ResponseErrorType = "auth_error" | "error";
+
+export type Request =
+	| { type: "create_session"; username: string }
+	| { type: "post_auth_message_response"; response: string | null }
+	| { type: "start_session"; cmd: string[]; env: string[] }
+	| { type: "cancel_session" };
+
+export type Response =
+	| { type: "success" }
+	| { type: "error"; error_type: ResponseErrorType; description: string }
+	| { type: "auth_message"; auth_message_type: AuthenticationMsgType; auth_message: string };
+
+type Endianness = "LE" | "BE";
+
+function getNativeEndianness(): Endianness {
+	return os.endianness();
+}
+
+function writeU32(buffer: Buffer, value: number, endian: Endianness, offset = 0): void {
+	if (endian === "LE") buffer.writeUInt32LE(value >>> 0, offset);
+	else buffer.writeUInt32BE(value >>> 0, offset);
+}
+
+function readU32(buffer: Buffer, endian: Endianness, offset = 0): number {
+	return endian === "LE" ? buffer.readUInt32LE(offset) : buffer.readUInt32BE(offset);
+}
+
+function parseResponse(value: unknown): Response {
+	if (!value || typeof value !== "object") {
+		throw new Error("Invalid greetd response: not an object");
+	}
+	const record = value as Record<string, unknown>;
+	const type = record.type;
+	if (type === "success") {
+		return { type: "success" };
+	}
+	if (type === "error") {
+		const errorType = record.error_type;
+		const description = record.description;
+		if (errorType !== "auth_error" && errorType !== "error") {
+			throw new Error(`Invalid greetd response: unknown error_type ${String(errorType)}`);
+		}
+		if (typeof description !== "string") {
+			throw new Error("Invalid greetd response: missing description");
+		}
+		return { type: "error", error_type: errorType, description };
+	}
+	if (type === "auth_message") {
+		const authMessageType = record.auth_message_type;
+		const authMessage = record.auth_message;
+		if (
+			authMessageType !== "visible" &&
+			authMessageType !== "secret" &&
+			authMessageType !== "info" &&
+			authMessageType !== "error"
+		) {
+			throw new Error(
+				`Invalid greetd response: unknown auth_message_type ${String(authMessageType)}`
+			);
+		}
+		if (typeof authMessage !== "string") {
+			throw new Error("Invalid greetd response: missing auth_message");
+		}
+		return { type: "auth_message", auth_message_type: authMessageType, auth_message: authMessage };
+	}
+
+	throw new Error(`Invalid greetd response type: ${String(type)}`);
+}
+
+function withTimeout<T>(promise: Promise<T>, timeoutMs: number, message: string): Promise<T> {
+	if (!Number.isFinite(timeoutMs) || timeoutMs <= 0) return promise;
+	let timeout: NodeJS.Timeout | undefined;
+	return Promise.race([
+		promise.finally(() => {
+			if (timeout) clearTimeout(timeout);
+		}),
+		new Promise<T>((_, reject) => {
+			timeout = setTimeout(() => reject(new Error(message)), timeoutMs).unref();
+		})
+	]);
+}
+
+export class GreetdIPC {
+	private readonly socket: net.Socket;
+	private readonly endian: Endianness;
+	private buffer = Buffer.alloc(0);
+	private frameQueue: Buffer[] = [];
+	private frameWaiters: Array<{ resolve: (frame: Buffer) => void; reject: (err: unknown) => void }> =
+		[];
+	private closedError: unknown | null = null;
+
+	private constructor(socket: net.Socket, endian: Endianness) {
+		this.socket = socket;
+		this.endian = endian;
+
+		socket.on("data", (chunk: Buffer) => {
+			const data = Buffer.from(chunk);
+			this.buffer = this.buffer.length === 0 ? data : Buffer.concat([this.buffer, data]);
+			this.drainFrames();
+		});
+		socket.on("error", (error) => this.closeWithError(error));
+		socket.on("close", () => this.closeWithError(new Error("greetd socket closed")));
+	}
+
+	static async new(socketPath: string | null, endian: Endianness = getNativeEndianness()): Promise<GreetdIPC> {
+		const path =
+			socketPath ??
+			(process.env[GREETD_IPC_SOCKET_PATH_ENV_NAME] as string | undefined) ??
+			null;
+		if (!path) {
+			throw new Error(`${GREETD_IPC_SOCKET_PATH_ENV_NAME} is not set and no socketPath was provided`);
+		}
+
+		const socket = net.createConnection({ path });
+		await new Promise<void>((resolve, reject) => {
+			socket.once("connect", resolve);
+			socket.once("error", reject);
+		});
+		return new GreetdIPC(socket, endian);
+	}
+
+	close(): void {
+		this.closeWithError(null);
+	}
+
+	private closeWithError(error: unknown | null): void {
+		if (this.closedError !== null) return;
+		this.closedError = error ?? new Error("greetd socket closed");
+
+		for (const waiter of this.frameWaiters.splice(0)) {
+			waiter.reject(this.closedError);
+		}
+		this.frameQueue = [];
+		this.buffer = Buffer.alloc(0);
+		this.socket.destroy();
+	}
+
+	private drainFrames(): void {
+		while (this.buffer.length >= 4) {
+			const payloadLen = readU32(this.buffer, this.endian, 0);
+			if (!Number.isFinite(payloadLen) || payloadLen < 0) {
+				this.closeWithError(new Error("Invalid greetd frame length"));
+				return;
+			}
+			const totalLen = 4 + payloadLen;
+			if (this.buffer.length < totalLen) return;
+			const frame = this.buffer.subarray(4, totalLen);
+			this.buffer = this.buffer.subarray(totalLen);
+			if (this.frameWaiters.length > 0) {
+				const waiter = this.frameWaiters.shift();
+				waiter?.resolve(frame);
+			} else {
+				this.frameQueue.push(frame);
+			}
+		}
+	}
+
+	private async readFrame(): Promise<Buffer> {
+		if (this.closedError) throw this.closedError;
+		if (this.frameQueue.length > 0) return this.frameQueue.shift() as Buffer;
+		return await new Promise<Buffer>((resolve, reject) => {
+			this.frameWaiters.push({ resolve, reject });
+		});
+	}
+
+	async sendMsg(request: Request): Promise<void> {
+		if (this.closedError) throw this.closedError;
+		const payload = Buffer.from(JSON.stringify(request), "utf8");
+		const header = Buffer.alloc(4);
+		writeU32(header, payload.length, this.endian, 0);
+		const msg = payload.length === 0 ? header : Buffer.concat([header, payload]);
+		await new Promise<void>((resolve, reject) => {
+			this.socket.write(msg, (err) => (err ? reject(err) : resolve()));
+		});
+	}
+
+	async readMsg(): Promise<Response> {
+		const frame = await this.readFrame();
+		let parsed: unknown;
+		try {
+			parsed = JSON.parse(frame.toString("utf8"));
+		} catch (error) {
+			throw new Error(`Failed to parse greetd JSON response: ${String(error)}`);
+		}
+		return parseResponse(parsed);
+	}
+}
+
+export class GreetdClient {
+	private ipcSocketPath: string;
+	private timeoutMs: number;
+
+	constructor(options: { ipcSocketPath?: string; timeoutMs?: number } = {}) {
+		const { ipcSocketPath = "/run/greetd.sock", timeoutMs = 5_000 } = options;
+		this.ipcSocketPath = ipcSocketPath;
+		this.timeoutMs = timeoutMs;
+	}
+
+	async login(options: GreetdLoginOptions): Promise<void> {
+		if (!options.username) throw new Error("username is a required parameter.");
+		const cmd = Array.isArray(options.cmd) ? options.cmd : [options.cmd];
+		if (cmd.length === 0 || cmd.every((part) => !part.trim())) {
+			throw new Error("cmd is a required parameter.");
+		}
+
+		const ipc = await GreetdIPC.new(this.ipcSocketPath);
+		try {
+			let stage: "create_session" | "start_session" = "create_session";
+			await ipc.sendMsg({ type: "create_session", username: options.username });
+
+			while (true) {
+				const response = await withTimeout(
+					ipc.readMsg(),
+					this.timeoutMs,
+					`greetd timeout waiting for ${stage} response`
+				);
+
+				if (response.type === "error") {
+					throw new Error(`greetd error: ${response.description}`);
+				}
+
+				if (response.type === "auth_message") {
+					const reply =
+						response.auth_message_type === "secret"
+							? (options.password ?? "")
+							: response.auth_message_type === "visible"
+								? ""
+								: null;
+					await ipc.sendMsg({ type: "post_auth_message_response", response: reply });
+					continue;
+				}
+
+				if (response.type === "success") {
+					if (stage === "create_session") {
+						stage = "start_session";
+						await ipc.sendMsg({ type: "start_session", cmd, env: options.env ?? [] });
+						continue;
+					}
+					return;
+				}
+			}
+		} finally {
+			ipc.close();
+		}
+	}
+}

src/renderer/assets.ts

@@ -0,0 +1,15 @@
+import path from "path";
+
+import { loadImage, type Image } from "@napi-rs/canvas";
+
+const ASSET_ROOT = path.resolve(__dirname, "..", "..", "asset");
+
+export function resolveAssetPath(relativePath: string): string {
+	return path.join(ASSET_ROOT, relativePath);
+}
+
+export async function loadImageAsset(relativePath: string): Promise<Image> {
+	console.debug("[debug] [renderer/assets] loadImageAsset " + relativePath)
+	const assetPath = resolveAssetPath(relativePath);
+	return loadImage(assetPath);
+}

src/renderer/cli.ts

@@ -0,0 +1,104 @@
+export type CliConfig = {
+	rendererId?: string;
+	debugGlobalHud: boolean;
+	debugRendererHud: boolean;
+	crashRecoverySession?: string | true;
+	errorScreenRequested?: boolean;
+	errorScreenMessage?: string;
+	errorScreenTitle?: string;
+	errorScreenHint?: string;
+	debugLogFile?: string;
+	helpRequested: boolean;
+};
+
+export function parseCli(argv: string[]): CliConfig {
+	// Bun passes: [bunPath, scriptPath, ...]
+	const args = argv.slice(2);
+	const config: CliConfig = {
+		debugGlobalHud: false,
+		debugRendererHud: false,
+		helpRequested: false
+	};
+
+	for (let i = 0; i < args.length; i++) {
+		const arg = args[i] ?? "";
+		if (arg === "--help" || arg === "-h") {
+			config.helpRequested = true;
+			continue;
+		}
+		if (arg === "--renderer" && args[i + 1] && !args[i + 1]!.startsWith("--")) {
+			config.rendererId = args[i + 1]!;
+			i += 1;
+			continue;
+		}
+		if (arg.startsWith("--renderer=")) {
+			config.rendererId = arg.split("=")[1];
+			continue;
+		}
+		if (arg === "--debug") {
+			config.debugGlobalHud = true;
+			config.debugRendererHud = true;
+			continue;
+		}
+		if (arg === "--debug-global") {
+			config.debugGlobalHud = true;
+			continue;
+		}
+		if (arg === "--debug-renderer") {
+			config.debugRendererHud = true;
+			continue;
+		}
+		if (arg === "--error-screen") {
+			config.errorScreenRequested = true;
+			if (args[i + 1] && !args[i + 1]!.startsWith("--")) {
+				config.errorScreenMessage = args[i + 1]!;
+				i += 1;
+			}
+			continue;
+		}
+		if (arg.startsWith("--error-screen=")) {
+			config.errorScreenRequested = true;
+			config.errorScreenMessage = arg.split("=").slice(1).join("=");
+			continue;
+		}
+		if (arg === "--error-title" && args[i + 1] && !args[i + 1]!.startsWith("--")) {
+			config.errorScreenTitle = args[i + 1]!;
+			i += 1;
+			continue;
+		}
+		if (arg.startsWith("--error-title=")) {
+			config.errorScreenTitle = arg.split("=").slice(1).join("=");
+			continue;
+		}
+		if (arg === "--error-hint" && args[i + 1] && !args[i + 1]!.startsWith("--")) {
+			config.errorScreenHint = args[i + 1]!;
+			i += 1;
+			continue;
+		}
+		if (arg.startsWith("--error-hint=")) {
+			config.errorScreenHint = arg.split("=").slice(1).join("=");
+			continue;
+		}
+		if (arg === "--debug-log-file" && args[i + 1] && !args[i + 1]!.startsWith("--")) {
+			config.debugLogFile = args[i + 1]!;
+			i += 1;
+			continue;
+		}
+		if (arg.startsWith("--debug-log-file=")) {
+			config.debugLogFile = arg.split("=").slice(1).join("=");
+			continue;
+		}
+		if (arg === "--crash-recovery") {
+			const maybeSession = args[i + 1];
+			if (maybeSession && !maybeSession.startsWith("--")) {
+				config.crashRecoverySession = maybeSession;
+				i += 1;
+			} else {
+				config.crashRecoverySession = "Hyprland";
+			}
+			continue;
+		}
+	}
+
+	return config;
+}

src/renderer/debug-hud.ts

@@ -0,0 +1,103 @@
+import type { CanvasRenderingContext2D } from "@napi-rs/canvas";
+
+import type { Layout } from "./layout";
+
+export type DebugStats = Record<string, string | number | boolean | undefined>;
+
+export type DebugHudOptions = {
+	showGlobal: boolean;
+	showRenderer: boolean;
+	showCustom?: boolean;
+};
+
+export type DebugHudData = {
+	global: DebugStats | string[];
+	renderer: {
+		id: string;
+		label: string;
+		stats: DebugStats;
+		fps: number;
+	};
+	custom?: DebugStats;
+};
+
+export type DebugHud = {
+	draw: (ctx: CanvasRenderingContext2D, layout: Layout, data: DebugHudData) => void;
+};
+
+export function createDebugHud(options: DebugHudOptions): DebugHud {
+	const padding = 8;
+	const lineHeight = 16;
+	const bg = "rgba(0, 0, 0, 0.65)";
+	const fg = "yellow"; // global
+	const rendererFg = "#ff66cc"; // renderer
+	const customFg = "#00c6ff"; // custom
+
+	const drawBlock = (
+		ctx: CanvasRenderingContext2D,
+		x: number,
+		y: number,
+		title: string,
+		stats: DebugStats | string[],
+		color: string
+	): { width: number; height: number } => {
+		let lines: string[] = [];
+		if (Array.isArray(stats)) {
+			lines = stats
+		} else {
+			const keys = Object.keys(stats);
+			lines = [title, ...keys.map((k) => `${k}: ${String(stats[k])}`)];
+		}
+		ctx.font = "14px \"JetBrains Mono\", monospace";
+		const textWidth = Math.max(...lines.map((l) => ctx.measureText(l).width));
+		const height = lines.length * lineHeight + padding * 2;
+		const width = textWidth + padding * 2;
+
+		ctx.save();
+		ctx.fillStyle = bg;
+		ctx.fillRect(x, y, width, height);
+		ctx.fillStyle = color;
+		ctx.textBaseline = "top";
+		lines.forEach((line, i) => {
+			ctx.fillText(line, x + padding, y + padding + i * lineHeight);
+		});
+		ctx.restore();
+
+		return { width, height };
+	};
+
+	const draw = (ctx: CanvasRenderingContext2D, layout: Layout, data: DebugHudData) => {
+		if (!options.showGlobal && !options.showRenderer && !options.showCustom) return;
+		ctx.save();
+		ctx.imageSmoothingEnabled = false;
+		ctx.globalAlpha = 0.9;
+
+		let cursorY = padding;
+		const originX = padding;
+
+		if (options.showGlobal) {
+			const { height } = drawBlock(ctx, originX, cursorY, "Global", data.global, fg);
+			cursorY += height + padding;
+		}
+
+		if (options.showRenderer) {
+			const { height } = drawBlock(
+				ctx,
+				originX,
+				cursorY,
+				`Renderer: ${data.renderer.label}`,
+				{ fps: data.renderer.fps.toFixed(2), ...data.renderer.stats },
+				rendererFg
+			);
+			cursorY += height + padding;
+		}
+
+		if (options.showCustom && data.custom) {
+			drawBlock(ctx, originX, cursorY, "Custom", data.custom, customFg);
+		}
+
+		ctx.restore();
+	};
+
+	return { draw };
+}

src/renderer/fps.ts

@@ -0,0 +1,27 @@
+export type FpsCounter = {
+	tick: (nowMs: number) => void;
+	value: number;
+};
+
+export function createFpsCounter(sampleWindowMs = 500): FpsCounter {
+	let lastSampleStart = Date.now();
+	let frameCount = 0;
+	let currentFps = 0;
+
+	const tick = (nowMs: number) => {
+		frameCount += 1;
+		const elapsed = nowMs - lastSampleStart;
+		if (elapsed >= sampleWindowMs) {
+			currentFps = (frameCount * 1000) / elapsed;
+			frameCount = 0;
+			lastSampleStart = nowMs;
+		}
+	};
+
+	return {
+		tick,
+		get value() {
+			return currentFps;
+		}
+	};
+}

src/renderer/index.ts

@@ -0,0 +1,155 @@
+import type { Events } from "@kmamal/sdl";
+import {
+	createCanvas,
+	type Canvas,
+	type CanvasRenderingContext2D
+} from "@napi-rs/canvas";
+
+import { SDLWindow, type WindowProps } from "./window";
+
+type RenderFrame = (
+	ctx: CanvasRenderingContext2D,
+	size: { width: number; height: number }
+) => void | Promise<void>;
+type RendererOptions = WindowProps & { window?: SDLWindow };
+
+export class Renderer {
+	readonly window: SDLWindow;
+	readonly canvas: Canvas;
+	readonly ctx: CanvasRenderingContext2D;
+	#animation: ReturnType<typeof setInterval> | undefined;
+	#pixelBuffer: Buffer | undefined;
+	#stride = 0;
+	#size: { width: number; height: number };
+	#stop: (() => void) | undefined;
+
+	constructor(options: RendererOptions = {}) {
+		console.debug("[debug] [renderer] new Renderer")
+		const { window: providedWindow, ...windowProps } = options;
+		this.window = providedWindow ?? new SDLWindow(windowProps);
+
+		const { width, height } = this.window.size;
+		this.#size = { width, height };
+		this.canvas = createCanvas(width, height);
+		this.ctx = this.canvas.getContext("2d");
+		this.ctx.imageSmoothingEnabled = false;
+		this.#syncPixelBuffer();
+	}
+
+	get size(): { width: number; height: number } {
+		return this.#size;
+	}
+
+	resize(width: number, height: number): void {
+		this.#size = { width, height };
+		if (this.canvas.width === width && this.canvas.height === height) {
+			return;
+		}
+		this.canvas.width = width;
+		this.canvas.height = height;
+		this.ctx.imageSmoothingEnabled = false;
+		this.#syncPixelBuffer();
+	}
+
+	present(): void {
+		if (!this.#pixelBuffer) {
+			this.#syncPixelBuffer();
+		}
+		this.window.renderFromBuffer(
+			this.canvas.width,
+			this.canvas.height,
+			this.#stride,
+			this.#pixelBuffer!
+		);
+	}
+
+	#syncPixelBuffer(): void {
+		this.#pixelBuffer = this.canvas.data();
+		this.#stride = Math.floor(
+			this.#pixelBuffer.byteLength / Math.max(1, this.canvas.height)
+		);
+	}
+
+	requestStop(): void {
+		this.#stop?.();
+	}
+
+	async run(renderFrame: RenderFrame): Promise<void> {
+		console.debug("[debug] [renderer] starting render")
+
+		const listeners: Array<() => void> = [];
+		let rendering = false;
+		const addListener = <E extends Events.Window.Any["type"]>(
+			event: E,
+			handler: (event: Extract<Events.Window.Any, { type: E }>) => void
+		) => {
+			listeners.push(this.window.on(event, handler));
+		};
+
+		const renderOnce = async () => {
+			await renderFrame(this.ctx, this.size);
+			this.present();
+		};
+
+		await renderOnce();
+
+		await new Promise<void>((resolve) => {
+			let stopped = false;
+
+			const cleanup = () => {
+				if (this.#animation) {
+					clearInterval(this.#animation);
+					this.#animation = undefined;
+				}
+				this.#stop = undefined;
+				listeners.splice(0).forEach((off) => off());
+			};
+
+			const stop = () => {
+				if (stopped) return;
+				stopped = true;
+				cleanup();
+				this.window.destroy();
+				resolve();
+			};
+			this.#stop = stop;
+
+			const tick = () => {
+				if (rendering) return;
+				rendering = true;
+				void renderOnce().finally(() => {
+					rendering = false;
+				});
+			};
+
+			this.#animation = setInterval(tick, 1000 / 60);
+			this.#animation.unref?.();
+
+			addListener("resize", async (event) => {
+				this.resize(event.pixelWidth, event.pixelHeight);
+				tick();
+			});
+
+			addListener("expose", () => {
+				tick();
+			});
+
+			addListener("keyDown", (event) => {
+				if (event.key === "Escape" || event.key === "Q") {
+					stop();
+				}
+			});
+
+			addListener("beforeClose", (event) => {
+				event.prevent();
+				stop();
+			});
+
+			addListener("close", () => stop());
+		});
+	}
+}
+
+export function createRenderer(options: RendererOptions = {}): Renderer {
+	return new Renderer(options);
+}

src/renderer/layout.ts

@@ -0,0 +1,65 @@
+export type Layout = {
+	width: number;
+	height: number;
+	viewScale: number;
+	boxWidth: number;
+	boxHeight: number;
+	boxX: number;
+	boxY: number;
+	contentScale: number;
+	drawWidth: number;
+	drawHeight: number;
+	x: number;
+	y: number;
+	centerX: number;
+	centerY: number;
+};
+
+export function createLayoutCalculator(options: {
+	baseWidth: number;
+	baseHeight: number;
+	viewWidth: number;
+	viewHeight: number;
+}): (size: { width: number; height: number }) => Layout {
+	let cachedLayout: Layout | undefined;
+
+	return (size: { width: number; height: number }): Layout => {
+		const { width, height } = size;
+		if (cachedLayout && cachedLayout.width === width && cachedLayout.height === height) {
+			return cachedLayout;
+		}
+
+		const viewScale = Math.min(width / options.viewWidth, height / options.viewHeight);
+		const boxWidth = options.viewWidth * viewScale;
+		const boxHeight = options.viewHeight * viewScale;
+		const boxX = (width - boxWidth) / 2;
+		const boxY = (height - boxHeight) / 2;
+
+		const contentScale = Math.min(boxWidth / options.baseWidth, boxHeight / options.baseHeight);
+		const drawWidth = options.baseWidth * contentScale;
+		const drawHeight = options.baseHeight * contentScale;
+		const x = boxX + (boxWidth - drawWidth) / 2;
+		const y = boxY + (boxHeight - drawHeight) / 2;
+		const centerX = boxX + boxWidth / 2;
+		const centerY = boxY + boxHeight / 2;
+
+		cachedLayout = {
+			width,
+			height,
+			viewScale,
+			boxWidth,
+			boxHeight,
+			boxX,
+			boxY,
+			contentScale,
+			drawWidth,
+			drawHeight,
+			x,
+			y,
+			centerX,
+			centerY
+		};
+
+		return cachedLayout;
+	};
+}

src/renderer/lazy-resource.ts

@@ -0,0 +1,45 @@
+export type LazyResource<T> = {
+	load: () => Promise<T>;
+	unload: () => void;
+	isLoaded: () => boolean;
+};
+
+export function createLazyResource<T>(
+	loader: () => Promise<T>,
+	dispose?: (value: T) => void
+): LazyResource<T> {
+	let cached: T | null = null;
+	let inflight: Promise<T> | null = null;
+
+	const load = async (): Promise<T> => {
+		if (cached) return cached;
+		if (inflight) return inflight;
+
+		inflight = (async () => {
+			const value = await loader();
+			cached = value;
+			inflight = null;
+			return value;
+		})();
+
+		return inflight;
+	};
+
+	const unload = () => {
+		if (cached && dispose) {
+			try {
+				dispose(cached);
+			} catch (error) {
+				console.error("[lazy-resource] failed to dispose resource", error);
+			}
+		}
+		cached = null;
+		inflight = null;
+	};
+
+	return {
+		load,
+		unload,
+		isLoaded: () => cached !== null
+	};
+}

src/renderer/video.ts

@@ -0,0 +1,94 @@
+import { ImageData } from "@napi-rs/canvas";
+
+import { resolveAssetPath } from "./assets";
+
+type VideoLoaderOptions = {
+	width: number;
+	height: number;
+	fps?: number;
+	maxFramesInMemory?: number;
+	frameSampleStep?: number;
+};
+
+export type VideoFrameSequence = {
+	width: number;
+	height: number;
+	fps: number;
+	durationMs: number;
+	frames: ImageData[];
+};
+
+export async function loadVideoFrames(
+	relativePath: string,
+	options: VideoLoaderOptions
+): Promise<VideoFrameSequence> {
+	const targetFps = options.fps ?? 30;
+	const assetPath = resolveAssetPath(relativePath);
+	const maxFrames = options.maxFramesInMemory ?? 0;
+	const sampleStep = Math.max(1, options.frameSampleStep ?? 1);
+
+	const ffmpeg = Bun.spawn(
+		[
+			"ffmpeg",
+			"-v", "error",
+			"-i", assetPath,
+			"-an",
+			"-vf", `scale=${options.width}:${options.height}`,
+			"-r", `${targetFps}`,
+			"-f", "rawvideo",
+			"-pix_fmt", "rgba",
+			"-"
+		],
+		{ stdout: "pipe", stderr: "pipe" }
+	);
+
+	const frameSize = options.width * options.height * 4;
+	const frames: ImageData[] = [];
+	let residual = new Uint8Array(0);
+	let decodedFrameCount = 0;
+
+	const stderrPromise = ffmpeg.stderr ? Bun.readableStreamToText(ffmpeg.stderr) : Promise.resolve("");
+
+	for await (const chunk of ffmpeg.stdout) {
+		const merged = new Uint8Array(residual.length + chunk.length);
+		merged.set(residual, 0);
+		merged.set(chunk, residual.length);
+		residual = merged;
+
+		while (residual.length >= frameSize) {
+			const frameBytes = residual.slice(0, frameSize);
+			residual = residual.slice(frameSize);
+			decodedFrameCount += 1;
+
+			if (decodedFrameCount % sampleStep !== 0) {
+				continue;
+			}
+
+			const clamped = new Uint8ClampedArray(frameBytes.buffer, frameBytes.byteOffset, frameBytes.byteLength);
+			const image = new ImageData(clamped, options.width, options.height);
+			if (maxFrames > 0 && frames.length >= maxFrames) {
+				frames.shift();
+			}
+			frames.push(image);
+		}
+	}
+
+	const exitCode = await ffmpeg.exited;
+	const stderr = await stderrPromise;
+	if (exitCode !== 0) {
+		throw new Error(`ffmpeg exited with code ${exitCode}${stderr ? `: ${stderr}` : ""}`);
+	}
+
+	if (frames.length === 0) {
+		throw new Error("No frames decoded from video");
+	}
+
+	const effectiveFrameCount = decodedFrameCount;
+	return {
+		width: options.width,
+		height: options.height,
+		fps: targetFps,
+		durationMs: (effectiveFrameCount / targetFps) * 1000,
+		frames
+	};
+}

src/renderer/window.ts

@@ -0,0 +1,98 @@
+import assert from "assert";
+
+import sdl, { type Events, type Sdl } from "@kmamal/sdl";
+import { createCanvas, Image, type CanvasRenderingContext2D } from "@napi-rs/canvas";
+
+export type WindowProps = {
+	title?: string;
+	width?: number;
+	height?: number;
+	visible?: boolean;
+	fullscreen?: boolean;
+	resizable?: boolean;
+	borderless?: boolean;
+	alwaysOnTop?: boolean;
+};
+
+export class SDLWindow {
+	#window: Sdl.Video.Window | undefined;
+
+	constructor(props: WindowProps = {}) {
+		console.debug("[debug] [renderer/window] new SDLWindow", props)
+		this.#window = sdl.video.createWindow({
+			...props,
+			title: props.title ?? "SDL Application"
+		});
+		if (process.env.NODE_ENV === "development") {
+			this.#window.on("resize", (e) => {
+				this.#window?.setTitle(`${props.title ?? "SDL Application"} [${e.pixelWidth}x${e.pixelHeight}]`)
+			})
+		}
+	}
+
+	get size(): { width: number; height: number } {
+		const { pixelWidth, pixelHeight } = this.Window;
+		return { width: pixelWidth, height: pixelHeight };
+	}
+
+	get Window(): Sdl.Video.Window {
+		if (!this.#window) throw "Window not present";
+		return this.#window;
+	}
+
+	on<EventName extends Events.Window.Any["type"]>(
+		event: EventName,
+		handler: (
+			event: Extract<Events.Window.Any, { type: EventName }>
+		) => void
+	): () => void {
+		const target = this.Window as unknown as {
+			on: (event: Events.Window.Any["type"], listener: (event: Events.Window.Any) => void) => void;
+			off?: (
+				event: Events.Window.Any["type"],
+				listener: (event: Events.Window.Any) => void
+			) => void;
+			removeListener?: (
+				event: Events.Window.Any["type"],
+				listener: (event: Events.Window.Any) => void
+			) => void;
+		};
+
+		target.on(event, handler as (event: Events.Window.Any) => void);
+		return () => {
+			if (typeof target.off === "function") {
+				target.off(event, handler as (event: Events.Window.Any) => void);
+				return;
+			}
+			if (typeof target.removeListener === "function") {
+				target.removeListener(
+					event,
+					handler as (event: Events.Window.Any) => void
+				);
+			}
+		};
+	}
+
+	renderFromBuffer(width: number, height: number, stride: number, buffer: Buffer): void {
+		this.Window.render(width, height, stride, "rgba32", buffer);
+	}
+
+	renderFromContext(ctx: CanvasRenderingContext2D): void {
+		const { width, height } = this.size;
+		const buffer = Buffer.from(ctx.getImageData(0, 0, width, height).data);
+		this.renderFromBuffer(width, height, width * 4, buffer);
+	}
+
+	setIconFromImage(image: Image): void {
+		const canvas = createCanvas(image.width, image.height);
+		const ctx = canvas.getContext("2d");
+		ctx.drawImage(image as any, 0, 0);
+		const data = ctx.getImageData(0, 0, image.width, image.height).data;
+		this.Window.setIcon(image.width, image.height, image.width * 4, "rgba32", Buffer.from(data));
+	}
+
+	destroy(): void {
+		this.Window.destroy();
+		this.#window = undefined;
+	}
+}

src/renderers/device_contact/index.ts

@@ -0,0 +1,240 @@
+import {
+	createCanvas,
+	type Canvas,
+	type CanvasRenderingContext2D
+} from "@napi-rs/canvas";
+
+import { createLazyResource } from "../../renderer/lazy-resource";
+import type { Layout } from "../../renderer/layout";
+import { loadVideoFrames, type VideoFrameSequence } from "../../renderer/video";
+import { AudioLoopPlayer } from "../../audio/player";
+import type { RendererInstance, RendererProps } from "../types";
+
+const BACKGROUND_VIDEO = {
+	path: "goner_bg_loop.mp4",
+	width: 160 * 2,
+	height: 90 * 2,
+	fps: 30
+} as const;
+const MAX_FRAMES_IN_MEMORY = Number(process.env.GONER_VIDEO_MAX_FRAMES ?? "0");
+const FRAME_SAMPLE_STEP = Number(process.env.GONER_VIDEO_FRAME_SAMPLE ?? "1");
+
+const VIDEO_LOOP_CROSSFADE_MS = 600;
+const OVERLAY_FADE_DURATION_MS = 2500;
+
+type GonerBackgroundResources = {
+	video: VideoFrameSequence;
+	videoCanvas: Canvas;
+	videoCtx: CanvasRenderingContext2D;
+	videoBlendCanvas: Canvas;
+	videoBlendCtx: CanvasRenderingContext2D;
+	audio?: AudioLoopPlayer;
+};
+
+export function createDeviceContactBackgroundRenderer(_props: RendererProps = {}): RendererInstance {
+	console.debug(`[debug] [renderers/device_contact] new RendererInstance`, _props);
+	let overlayStart = Date.now();
+	let videoTimeMs = 0;
+
+	let lastVideoMeta: { durationMs: number; width: number; height: number; fps: number } | undefined;
+	const resources = createLazyResource<GonerBackgroundResources>(
+		async () => {
+			const video = await loadVideoFrames(BACKGROUND_VIDEO.path, {
+				width: BACKGROUND_VIDEO.width,
+				height: BACKGROUND_VIDEO.height,
+				fps: BACKGROUND_VIDEO.fps,
+				maxFramesInMemory: Number.isFinite(MAX_FRAMES_IN_MEMORY) ? MAX_FRAMES_IN_MEMORY : 0,
+				frameSampleStep: Number.isFinite(FRAME_SAMPLE_STEP) && FRAME_SAMPLE_STEP > 0 ? FRAME_SAMPLE_STEP : 1
+			});
+			lastVideoMeta = {
+				durationMs: video.durationMs,
+				width: video.width,
+				height: video.height,
+				fps: video.fps
+			};
+
+			const videoCanvas = createCanvas(video.width, video.height);
+			const videoCtx = videoCanvas.getContext("2d");
+			const videoBlendCanvas = createCanvas(video.width, video.height);
+			const videoBlendCtx = videoBlendCanvas.getContext("2d");
+			let audio: AudioLoopPlayer | undefined;
+			try {
+				audio = await AudioLoopPlayer.fromAsset("AUDIO_ANOTHERHIM.ogg");
+				audio.start();
+			} catch (error) {
+				console.error("[renderers/device_contact] failed to start audio loop", error);
+			}
+
+			return {
+				video,
+				videoCanvas,
+				videoCtx,
+				videoBlendCanvas,
+				videoBlendCtx,
+				audio
+			};
+		},
+		(resource) => {
+			if (resource.audio) {
+				try {
+					resource.audio.stop();
+				} catch (error) {
+					console.error("[renderers/device_contact] failed to stop audio loop", error);
+				}
+			}
+			resource.video.frames.length = 0;
+			resource.videoCanvas.width = 0;
+			resource.videoCanvas.height = 0;
+			resource.videoBlendCanvas.width = 0;
+			resource.videoBlendCanvas.height = 0;
+		}
+	);
+
+	const render = async ({ ctx, deltaMs, layout }: { ctx: CanvasRenderingContext2D; deltaMs: number; layout: Layout; }) => {
+		const {
+			video,
+			videoCanvas,
+			videoCtx,
+			videoBlendCanvas,
+			videoBlendCtx
+		} = await resources.load();
+
+		const clampedDelta = Math.max(0, deltaMs);
+		videoTimeMs += clampedDelta;
+		while (videoTimeMs >= video.durationMs) {
+			videoTimeMs -= video.durationMs;
+		}
+
+		drawVideoBackground(
+			ctx,
+			layout,
+			videoTimeMs,
+			video,
+			videoCanvas,
+			videoCtx,
+			videoBlendCanvas,
+			videoBlendCtx
+		);
+
+		drawOverlay(ctx, layout, overlayStart);
+	};
+
+	return {
+		id: "device_contact",
+		label: "DEVICE CONTACT",
+		render,
+		unload: () => {
+			overlayStart = Date.now();
+			videoTimeMs = 0;
+			resources.unload();
+		},
+		isLoaded: resources.isLoaded,
+		getDebugStats: () => {
+			const meta = lastVideoMeta;
+			return {
+				loaded: resources.isLoaded(),
+				videoMs: Number.isFinite(videoTimeMs) ? videoTimeMs.toFixed(2) : 0,
+				durationMs: meta?.durationMs,
+				fps: meta?.fps,
+				width: meta?.width,
+				height: meta?.height,
+				maxFrames: MAX_FRAMES_IN_MEMORY || "all",
+				sampleStep: FRAME_SAMPLE_STEP
+			};
+		},
+		getDebugHudStats: () => ({
+			offsetMs: videoTimeMs.toFixed(0),
+			sample: FRAME_SAMPLE_STEP
+		})
+	} as RendererInstance;
+}
+
+function drawOverlay(
+	ctx: CanvasRenderingContext2D,
+	layout: Layout,
+	overlayStart: number
+) {
+	const overlayProgress = Math.min(
+		1,
+		Math.max(0, (Date.now() - overlayStart) / OVERLAY_FADE_DURATION_MS)
+	);
+	const overlayAlpha = 1 - overlayProgress * 0.7; // fade 1 -> 0.3
+	ctx.save();
+	ctx.globalAlpha = overlayAlpha;
+	ctx.fillStyle = "black";
+	ctx.fillRect(0, 0, layout.width, layout.height);
+	ctx.restore();
+}
+
+function drawVideoBackground(
+	ctx: CanvasRenderingContext2D,
+	layout: Layout,
+	videoTimeMs: number,
+	video: VideoFrameSequence,
+	videoCanvas: Canvas,
+	videoCtx: CanvasRenderingContext2D,
+	videoBlendCanvas: Canvas,
+	videoBlendCtx: CanvasRenderingContext2D
+) {
+	const {
+		boxX,
+		boxY,
+		boxWidth,
+		boxHeight
+	} = layout;
+
+	const elapsed = videoTimeMs % video.durationMs;
+	const frameIndex = Math.floor((elapsed / 1000) * video.fps) % video.frames.length;
+	const frame = video.frames[frameIndex] ?? video.frames[0];
+
+	let blendFrame: VideoFrameSequence["frames"][number] | undefined;
+	let blendAlpha = 0;
+	if (elapsed >= video.durationMs - VIDEO_LOOP_CROSSFADE_MS) {
+		const fadeT = (elapsed - (video.durationMs - VIDEO_LOOP_CROSSFADE_MS)) / VIDEO_LOOP_CROSSFADE_MS;
+		blendAlpha = Math.min(1, Math.max(0, fadeT));
+		const loopElapsed = elapsed - (video.durationMs - VIDEO_LOOP_CROSSFADE_MS); // 0..crossfade
+		const blendIndex = Math.floor((loopElapsed / 1000) * video.fps) % video.frames.length;
+		blendFrame = video.frames[blendIndex] ?? video.frames[0];
+	}
+
+	// Draw the raw frame to an offscreen canvas, then scale to the target size.
+	videoCtx.clearRect(0, 0, video.width, video.height);
+	videoCtx.putImageData(frame as any, 0, 0);
+	if (blendFrame && blendAlpha > 0) {
+		videoBlendCtx.clearRect(0, 0, video.width, video.height);
+		videoBlendCtx.putImageData(blendFrame as any, 0, 0);
+		videoCtx.save();
+		videoCtx.globalAlpha = blendAlpha;
+		(videoCtx as any).drawImage(videoBlendCanvas as any, 0, 0);
+		videoCtx.restore();
+	}
+
+	const scale = boxHeight / video.height;
+	const scaledWidth = video.width * scale;
+
+	// crop horizontal
+	let srcX = 0;
+	let srcWidth = video.width;
+	let destWidth = scaledWidth;
+	if (scaledWidth > boxWidth) {
+		const cropWidth = boxWidth / scale;
+		srcX = (video.width - cropWidth) / 2;
+		srcWidth = cropWidth;
+		destWidth = boxWidth;
+	}
+
+	const drawX = boxX + (boxWidth - destWidth) / 2;
+	const drawY = boxY;
+
+	ctx.save();
+	ctx.imageSmoothingEnabled = false;
+	ctx.beginPath();
+	ctx.rect(boxX, boxY, boxWidth, boxHeight);
+	ctx.clip();
+	(ctx as any).drawImage(
+		videoCanvas as any,
+		srcX, 0, srcWidth, video.height,
+		drawX, drawY, destWidth, boxHeight
+	);
+	ctx.restore();
+}

src/renderers/error/index.ts

@@ -0,0 +1,192 @@
+import type { CanvasRenderingContext2D } from "@napi-rs/canvas";
+
+import {
+	drawBitmapTextPerGlyph,
+	loadBitmapFont,
+	measureTextWidth
+} from "../../bootsequence/font";
+import { loadImageAsset } from "../../renderer/assets";
+import { createLazyResource } from "../../renderer/lazy-resource";
+import type { Layout } from "../../renderer/layout";
+import type { RendererInstance, RendererProps } from "../types";
+
+type ErrorRendererProps = {
+	title?: string;
+	message?: string | string[];
+	hint?: string;
+};
+
+type ErrorResources = {
+	font: Awaited<ReturnType<typeof loadBitmapFont>>;
+	heart: Awaited<ReturnType<typeof loadImageAsset>>;
+};
+
+function wrapBitmapText(
+	text: string,
+	maxWidth: number,
+	measure: (t: string) => number
+): string[] {
+	const words = text.split(/\s+/);
+	const lines: string[] = [];
+
+	let current = "";
+
+	for (const w of words) {
+		const next = current ? `${current} ${w}` : w;
+		if (measure(next) <= maxWidth) {
+			current = next;
+		} else {
+			if (current) lines.push(current);
+			current = w;
+		}
+	}
+
+	if (current) lines.push(current);
+	return lines;
+}
+
+export function createErrorRenderer(props: RendererProps = {}): RendererInstance {
+	console.debug(`[debug] [renderers/error] new RendererInstance`, props);
+
+	const config: ErrorRendererProps = {
+		title: typeof props.title === "string" ? props.title : "ERROR",
+		message:
+			typeof props.message === "string"
+				? props.message
+				: Array.isArray(props.message)
+					? props.message.map(String).join("\n")
+					: "Something went wrong.",
+		hint: typeof props.hint === "string" ? props.hint : "Press Enter to exit."
+	};
+
+	const resources = createLazyResource<ErrorResources>(async () => {
+		const font = await loadBitmapFont();
+		const heart = await loadImageAsset("IMAGE_SOUL_BLUR_0.png");
+		return { font, heart };
+	});
+
+	let blinkMs = 0;
+	let acknowledged = false;
+
+	const render = async ({
+		ctx,
+		layout,
+		deltaMs
+	}: {
+		ctx: CanvasRenderingContext2D;
+		layout: Layout;
+		deltaMs: number;
+	}) => {
+		const { font, heart } = await resources.load();
+		blinkMs += deltaMs;
+		const pulse = 0.5 + Math.sin(blinkMs / 300) * 0.5;
+
+		ctx.save();
+		ctx.fillStyle = "black";
+		ctx.fillRect(0, 0, layout.width, layout.height);
+
+		ctx.translate(layout.x, layout.y);
+		ctx.imageSmoothingEnabled = false;
+		const scale = layout.contentScale;
+		ctx.scale(scale, scale);
+
+		const w = layout.drawWidth / scale;
+		const h = layout.drawHeight / scale;
+		const cx = w / 2;
+
+		/* ---------- title ---------- */
+		const title = config.title ?? "ERROR";
+		const titleScale = 1.2;
+		const titleWidth = measureTextWidth(title, font, { scale: titleScale });
+		const titleY = font.lineHeight * 1.5;
+
+		drawBitmapTextPerGlyph(
+			ctx,
+			font,
+			title,
+			cx - titleWidth / 2,
+			titleY,
+			{
+				scale: titleScale
+			}
+		);
+
+		/* ---------- body ---------- */
+		const bodyScale = 0.7;
+		const maxWidth = w * 0.9;
+		const messageText = Array.isArray(config.message)
+			? config.message.join(" ")
+			: config.message ?? "";
+		const wrapped = wrapBitmapText(
+			messageText,
+			maxWidth / bodyScale,
+			(t) => measureTextWidth(t, font)
+		);
+
+		ctx.save();
+		ctx.scale(bodyScale, bodyScale);
+		const bodyCx = cx / bodyScale;
+		const bodyStartY = h / bodyScale / 2 - (wrapped.length * font.lineHeight) / 2;
+
+		for (let i = 0; i < wrapped.length; i++) {
+			const line = wrapped[i] ?? "";
+			const lw = measureTextWidth(line, font);
+			drawBitmapTextPerGlyph(
+				ctx,
+				font,
+				line,
+				bodyCx - lw / 2,
+				bodyStartY + i * font.lineHeight
+			);
+		}
+
+		ctx.restore();
+
+		/* ---------- hint ---------- */
+		const hint = config.hint ?? "";
+		const hintScale = 0.2;
+		const hintWidth = measureTextWidth(hint, font, { scale: hintScale });
+		const hintY = h - font.lineHeight * 2;
+
+		ctx.globalAlpha = 0.7 + pulse * 0.3;
+
+		drawBitmapTextPerGlyph(
+			ctx,
+			font,
+			hint,
+			cx - hintWidth / 2,
+			hintY,
+			{
+				scale: hintScale
+			}
+		);
+
+		ctx.restore();
+	};
+
+	return {
+		id: "errormessage",
+		label: "Error",
+		render,
+		handleKey(key) {
+			if (!key) return true;
+		},
+		shouldExit() {
+			return acknowledged;
+		},
+		getResult() {
+			return { acknowledged, title: config.title, message: config.message };
+		},
+		unload() {
+			// nothing to dispose
+		},
+		isLoaded: resources.isLoaded,
+		getDebugStats() {
+			return {
+				loaded: resources.isLoaded(),
+				acknowledged,
+				blinkMs: Number(blinkMs.toFixed(1))
+			};
+		}
+	};
+}

src/renderers/index.ts

@@ -0,0 +1,55 @@
+import { createDeviceContactBackgroundRenderer } from "./device_contact";
+import { createErrorRenderer } from "./error";
+import { createRecoveryMenuRenderer } from "./recoverymenu";
+import type { RendererFactory, RendererInstance, RendererProps, RendererRegistry } from "./types";
+
+const registry: Record<string, { label: string; factory: RendererFactory }> = {
+	device_contact: { label: "DEVICE CONTACT", factory: createDeviceContactBackgroundRenderer },
+	recoverymenu: { label: "Recovery", factory: createRecoveryMenuRenderer },
+	errormessage: { label: "Error", factory: createErrorRenderer }
+};
+
+const aliases: Record<string, keyof typeof registry> = {
+	"goner-bg": "device_contact",
+	error: "errormessage"
+};
+
+const resolveId = (id: string): keyof typeof registry => {
+	return aliases[id] ?? (id as keyof typeof registry);
+};
+
+export function createRendererRegistry(options: { defaultId?: string; rendererProps?: Record<string, RendererProps> } = {}): RendererRegistry {
+	console.debug(`[debug] [renderers] new RendererRegistry`, options);
+	const rendererPropsById = options.rendererProps ?? {};
+	let activeId: keyof typeof registry | null = null;
+	let activeInstance: RendererInstance | null = null;
+
+	const switchTo = (id: string, propsOverride?: RendererProps): RendererInstance => {
+		const resolvedId = resolveId(id);
+		const target = registry[resolvedId];
+		if (!target) {
+			throw new Error(`[debug] [renderer] Renderer "${id}" not found`);
+		}
+		if (activeInstance) {
+			console.warn(`[debug] [renderers] unloading current ${activeInstance.id}`);
+			activeInstance.unload();
+		}
+		activeId = resolvedId;
+		activeInstance = target.factory(propsOverride ?? rendererPropsById[resolvedId]);
+		return activeInstance;
+	};
+
+	if (options.defaultId) {
+		switchTo(options.defaultId);
+	}
+
+	const getActive = () => {
+		if (!activeInstance || !activeId) {
+			throw new Error("No active renderer");
+		}
+		return activeInstance;
+	};
+	const list = () => Object.entries(registry).map(([id, meta]) => ({ id, label: meta.label }));
+
+	return { getActive, switchTo, list };
+}

src/renderers/recoverymenu/index.ts

@@ -0,0 +1,338 @@
+import type { CanvasRenderingContext2D } from "@napi-rs/canvas";
+import * as sdl from "@kmamal/sdl";
+
+import { decodeOggToPCM } from "../../audio/decoder";
+import { AudioLoopPlayer } from "../../audio/player";
+import { loadImageAsset, resolveAssetPath } from "../../renderer/assets";
+import { createLazyResource } from "../../renderer/lazy-resource";
+import type { Layout } from "../../renderer/layout";
+import {
+	drawBitmapTextPerGlyph,
+	loadBitmapFont,
+	measureTextWidth
+} from "../../bootsequence/font";
+import type { RendererInstance, RendererProps } from "../types";
+
+/* ---------------- */
+
+function wrapBitmapText(
+	text: string,
+	maxWidth: number,
+	measure: (t: string) => number
+): string[] {
+	const words = text.split(/\s+/);
+	const lines: string[] = [];
+
+	let current = "";
+
+	for (const w of words) {
+		const next = current ? `${current} ${w}` : w;
+		if (measure(next) <= maxWidth) {
+			current = next;
+		} else {
+			if (current) lines.push(current);
+			current = w;
+		}
+	}
+
+	if (current) lines.push(current);
+	return lines;
+}
+
+/* ---------------- */
+
+type AudioSamplePlayer = {
+	play(): void;
+	dispose(): void;
+};
+
+type MenuResources = {
+	font: Awaited<ReturnType<typeof loadBitmapFont>>;
+	heart: Awaited<ReturnType<typeof loadImageAsset>>;
+	drone: AudioLoopPlayer;
+	sndMove: AudioSamplePlayer;
+	sndSelect: AudioSamplePlayer;
+};
+
+type RecoveryMenuProps = {
+	question?: string;
+	yesLabel?: string;
+	noLabel?: string;
+};
+
+/* ---------------- */
+
+async function loadSample(alwaysTry: string[]): Promise<AudioSamplePlayer> {
+	for (const rel of alwaysTry) {
+		const path = resolveAssetPath(rel);
+		try {
+			const decoded = await decodeOggToPCM(path);
+			const playbackDevice =
+				sdl.audio.devices.find((d) => d.type === "playback") ??
+				{ type: "playback" as const };
+
+			const device = sdl.audio.openDevice(playbackDevice as any, {
+				format: decoded.format,
+				channels: decoded.channels as 1 | 2 | 4 | 6,
+				frequency: decoded.sampleRate
+			});
+
+			return {
+				play() {
+					device.clearQueue();
+					device.enqueue(decoded.pcm);
+					device.play(false);
+				},
+				dispose() {
+					device.clearQueue();
+					device.close();
+				}
+			};
+		} catch { }
+	}
+
+	throw new Error("sample load failed");
+}
+
+/* ---------------- */
+
+export function createRecoveryMenuRenderer(
+	props: RendererProps = {}
+): RendererInstance {
+	console.debug(`[debug] [renderers/recoverymenu] new RendererInstance`, props);
+
+	const config: RecoveryMenuProps = {
+		question:
+			typeof props.question === "string"
+				? props.question
+				: "????????/?",
+		yesLabel: typeof props.yesLabel === "string" ? props.yesLabel : "Yes",
+		noLabel: typeof props.noLabel === "string" ? props.noLabel : "No"
+	};
+
+	const resources = createLazyResource<MenuResources>(async () => {
+		const font = await loadBitmapFont();
+		const heart = await loadImageAsset("IMAGE_SOUL_BLUR_0.png");
+		const drone = await AudioLoopPlayer.fromAsset("AUDIO_DRONE.ogg");
+		const sndMove = await loadSample(["snd_menumove.wav", "snd_menumode.wav"]);
+		const sndSelect = await loadSample(["snd_select.wav"]);
+		return { font, heart, drone, sndMove, sndSelect };
+	});
+
+	let blinkMs = 0;
+	let selection: "yes" | "no" = "yes";
+	let confirmed = false;
+
+	const render = async ({
+		ctx,
+		layout,
+		deltaMs
+	}: {
+		ctx: CanvasRenderingContext2D;
+		layout: Layout;
+		deltaMs: number;
+	}) => {
+		const { font, heart, drone } = await resources.load();
+		if (!drone.playing) drone.start();
+
+		blinkMs += deltaMs;
+		const pulse = 0.5 + Math.sin(blinkMs / 300) * 0.5;
+
+		ctx.save();
+		ctx.fillStyle = "black";
+		ctx.fillRect(0, 0, layout.width, layout.height);
+
+		ctx.translate(layout.x, layout.y);
+		ctx.imageSmoothingEnabled = false;
+
+		const scale = layout.contentScale;
+		ctx.scale(scale, scale);
+
+		const w = layout.drawWidth / scale;
+		const h = layout.drawHeight / scale;
+		const cx = w / 2;
+
+		const question = config.question ?? "";
+		const yes = config.yesLabel ?? "Yes";
+		const no = config.noLabel ?? "No";
+
+		/* ---------- question ---------- */
+
+		const QUESTION_SCALE = 0.62;
+		const QUESTION_MAX_WIDTH = w * 0.9;
+
+		ctx.save();
+		ctx.scale(QUESTION_SCALE, QUESTION_SCALE);
+
+		const scx = cx / QUESTION_SCALE;
+		const sh = h / QUESTION_SCALE;
+
+		const wrapped = wrapBitmapText(
+			question,
+			QUESTION_MAX_WIDTH / QUESTION_SCALE,
+			(t) => measureTextWidth(t, font)
+		);
+
+		const qStartY = sh - font.lineHeight * 5;
+
+		for (let i = 0; i < wrapped.length; i++) {
+			const line = wrapped[i];
+			const lw = measureTextWidth(line ?? "", font);
+			drawBitmapTextPerGlyph(
+				ctx,
+				font,
+				line ?? "",
+				scx - lw / 2,
+				(qStartY + i * font.lineHeight) - 50
+			);
+		}
+
+		ctx.restore();
+
+		/* ---------- options ---------- */
+
+		const ANSWER_SCALE = 0.8;
+		const spacing = font.lineHeight * ANSWER_SCALE * 1.2;
+		const yesW = measureTextWidth(yes, font, { scale: ANSWER_SCALE });
+		const noW = measureTextWidth(no, font, { scale: ANSWER_SCALE });
+
+		const yesY = h - font.lineHeight * 3;
+		const noY = yesY + spacing;
+		const yesX = cx - yesW / 2;
+		const noX = cx - noW / 2;
+
+		drawBitmapTextPerGlyph(
+			ctx,
+			font,
+			yes,
+			yesX,
+			yesY,
+			{
+				scale: ANSWER_SCALE
+			}
+		);
+
+		drawBitmapTextPerGlyph(
+			ctx,
+			font,
+			no,
+			noX,
+			noY,
+			{
+				scale: ANSWER_SCALE
+			}
+		);
+
+		const heartSize = font.lineHeight * 0.75;
+		const selW = selection === "yes" ? yesW : noW;
+		const selY = selection === "yes" ? yesY : noY;
+		const heartX = cx - selW / 2 - heartSize - 6;
+		const heartY = selY + (font.lineHeight * ANSWER_SCALE - heartSize) / 2;
+
+		ctx.globalAlpha = 0.7 + pulse * 0.3;
+		(ctx as any).drawImage(
+			heart as any,
+			0,
+			0,
+			heart.width,
+			heart.height,
+			heartX,
+			heartY,
+			heartSize,
+			heartSize
+		);
+
+		ctx.restore();
+	};
+
+	const onSelect = (dir: "yes" | "no") => {
+		const changed = dir !== selection;
+		selection = dir;
+		void resources.load().then((r) => {
+			(changed ? r.sndMove : r.sndSelect).play();
+		});
+	};
+
+	return {
+		id: "recoverymenu",
+		label: "Recovery Menu",
+		render,
+		handleKey(key) {
+			if (!key) return true;
+
+			const k = key.toLowerCase();
+
+			if (
+				k === "arrowup" ||
+				k === "up" ||
+				k === "w" ||
+				k === "k"
+			) {
+				onSelect(selection === "yes" ? "no" : "yes");
+				return true;
+			}
+
+			if (
+				k === "arrowdown" ||
+				k === "down" ||
+				k === "s" ||
+				k === "j"
+			) {
+				onSelect(selection === "yes" ? "no" : "yes");
+				return true;
+			}
+
+			if (k === "arrowleft" || k === "left") {
+				onSelect("yes");
+				return true;
+			}
+
+			if (k === "arrowright" || k === "right") {
+				onSelect("no");
+				return true;
+			}
+
+			if (
+				k === "enter" ||
+				k === "return" ||
+				k === " " ||
+				k === "space" ||
+				k === "z"
+			) {
+				confirmed = true;
+				onSelect(selection);
+				return true;
+			}
+
+			return true;
+		},
+		shouldExit() {
+			return confirmed;
+		},
+		getResult() {
+			return selection;
+		},
+		unload() {
+			if (!resources.isLoaded()) return;
+			void resources.load().then((r) => {
+				r.drone.stop();
+				r.sndMove.dispose();
+				r.sndSelect.dispose();
+			});
+		},
+		isLoaded: resources.isLoaded,
+		getDebugStats() {
+			return {
+				loaded: resources.isLoaded(),
+				selection,
+				blinkMs: Number(blinkMs.toFixed(1))
+			};
+		},
+		getDebugHudStats() {
+			return {
+				selection,
+				dronePlaying: resources.isLoaded()
+			};
+		}
+	};
+}

src/renderers/types.ts

@@ -0,0 +1,35 @@
+import type { CanvasRenderingContext2D } from "@napi-rs/canvas";
+
+import type { Layout } from "../renderer/layout";
+
+export type RendererProps = Record<string, unknown>;
+
+export type RendererRenderArgs = {
+	ctx: CanvasRenderingContext2D;
+	layout: Layout;
+	deltaMs: number;
+};
+
+export type RendererDebugHud = (ctx: CanvasRenderingContext2D, layout: Layout) => void;
+
+export type RendererInstance = {
+	id: string;
+	label: string;
+	render: (args: RendererRenderArgs) => Promise<void> | void;
+	handleKey?: (key: string | null) => boolean | void;
+	unload: () => void;
+	isLoaded: () => boolean;
+	getDebugStats?: () => Record<string, string | number | boolean | undefined>;
+	getDebugHudStats?: () => Record<string, string | number | boolean | undefined>;
+
+	shouldExit?: () => boolean;
+	getResult?: () => unknown;
+};
+
+export type RendererFactory = (props?: RendererProps) => RendererInstance;
+
+export type RendererRegistry = {
+	getActive: () => RendererInstance;
+	switchTo: (id: string, propsOverride?: RendererProps) => RendererInstance;
+	list: () => Array<{ id: string; label: string }>;
+};

src/types.ts

@@ -0,0 +1,6 @@
+export type BootsequenceAnswers = {
+	char: string;
+	desktop: string;
+	color: string;
+	gift: string;
+};

src/ui/app.ts

@@ -0,0 +1,574 @@
+import { createWriteStream, mkdirSync } from "node:fs";
+import { dirname } from "node:path";
+import { type CanvasRenderingContext2D } from "@napi-rs/canvas";
+
+import { createBootSequenceUI } from "../bootsequence/questions";
+import { GREETD_SOCKET, handoffToGreetd } from "../desktop";
+import type { BootsequenceAnswers } from "../types";
+import { loadImageAsset } from "../renderer/assets";
+import { parseCli } from "../renderer/cli";
+import { createDebugHud } from "../renderer/debug-hud";
+import { createFpsCounter } from "../renderer/fps";
+import { createLayoutCalculator } from "../renderer/layout";
+import { createRenderer } from "../renderer/index";
+import { SDLWindow } from "../renderer/window";
+import { createRendererRegistry } from "../renderers";
+import type { RendererInstance, RendererProps } from "../renderers/types";
+
+const BUNVERS = `Bun ${Bun.version} ${process.platform} ${process.arch}`;
+const DEFAULT_DEBUG_LOG_FILE = "/tmp/device_contact.debug.log";
+const LOG_LIFETIME_MS = 8_000;
+const LOG_FADE_MS = 3_000;
+const LOG_MAX_LINES = 64;
+const debugLogEntries: DebugLogEntry[] = [];
+
+export async function runDeviceContactUI(argv: string[] = process.argv) {
+	const cli = parseCli(argv);
+	const isDev = process.env.NODE_ENV === "development";
+	const debugOptions = {
+		showGlobal: isDev || cli.debugGlobalHud || process.env.DEBUG_UI === "true",
+		showRenderer: isDev || cli.debugRendererHud || process.env.DEBUG_RENDERER === "true" || cli.debugGlobalHud,
+		showCustom: isDev || cli.debugGlobalHud || process.env.DEBUG_UI === "true"
+	};
+	const debugLoggingEnabled = debugHudOptionsEnabled(debugOptions);
+	const debugLogFile =
+		cli.debugLogFile ??
+		process.env.DEBUG_LOG_FILE ??
+		(debugLoggingEnabled ? DEFAULT_DEBUG_LOG_FILE : undefined);
+	const restoreDebug =
+		debugLoggingEnabled || debugLogFile
+			? hookDebugLogs({ filePath: debugLogFile })
+			: () => { };
+
+	console.debug("[debug] ESTABLISHING CONNECTION");
+	console.debug("[debug]", BUNVERS);
+
+	const isCrashRecovery = !!(cli.crashRecoverySession ?? process.env.CRASH_RECOVERY_SESSION);
+	const forcedErrorScreen = Boolean(cli.errorScreenRequested);
+	const requestedRenderer = cli.rendererId ?? "device_contact";
+	const defaultRendererId = forcedErrorScreen
+		? "errormessage"
+		: isCrashRecovery
+			? "recoverymenu"
+			: requestedRenderer;
+	const shouldRunBootSequence = defaultRendererId !== "recoverymenu" && defaultRendererId !== "errormessage";
+	const isTTY = process.env.SDL_VIDEODRIVER === "kmsdrm";
+	const isCage = process.env.IS_CAGE === "true";
+
+	const windowOptions = {
+		// DO NOT CHANGE TITLE
+		title: "DEVICE CONTACT (DELTARUNE Chapter 1)",
+		width: 1920,
+		height: 1080,
+		fullscreen: true
+	};
+
+	const window = new SDLWindow(windowOptions);
+	window.Window.setFullscreen(true);
+
+	// will segfault bun if ran in tty
+	if (!isTTY && !isCage) {
+		window.on("keyUp", (e) => {
+			if (e.key === "f11") {
+				window.Window.setFullscreen(!window.Window.fullscreen);
+			}
+		});
+	}
+
+	const icon = await loadImageAsset("icon.png");
+	window.setIconFromImage(icon);
+	window.Window.setResizable(true);
+	window.Window.setAccelerated(true);
+
+	if (isTTY) {
+		console.debug("[debug] KMSDRM detected, What the fuck?? Deltarune in the TTY?");
+	}
+	if (isCage) {
+		console.debug("[debug] Cage detected, are you trying to make a login manager or something?");
+		setInterval(() => {
+			try {
+				if (!window.Window.fullscreen) window.Window.setFullscreen(true);
+			} catch { }
+		}, 100)
+	}
+
+	// Base dim for UI/layout (matches the original background logical size).
+	const baseWidth = 160;
+	const baseHeight = 120;
+	const viewWidth = 1280;
+	const viewHeight = 960;
+	const uiScale = 0.6;
+	const crashRecoverySession = cli.crashRecoverySession ?? process.env.CRASH_RECOVERY_SESSION;
+
+	const renderer = createRenderer({ window });
+	renderer.ctx.imageSmoothingEnabled = false;
+
+	const rendererPropsById: Record<string, RendererProps> = {
+		recoverymenu: {
+			question: crashRecoverySession
+				? `${crashRecoverySession} crashed. Do you want to restart it?`
+				: "?????",
+			yesLabel: "Yes",
+			noLabel: "No",
+			session: crashRecoverySession
+		},
+		errormessage: {
+			title: cli.errorScreenTitle ?? process.env.ERROR_TITLE ?? "ERROR",
+			message: cli.errorScreenMessage ?? process.env.ERROR_MESSAGE ?? "An unexpected error occurred.",
+			hint: cli.errorScreenHint ?? process.env.ERROR_HINT ?? "Switch between VT's with CTRL+ALT+F[0-9]."
+		}
+	};
+
+	const rendererRegistry = createRendererRegistry({ rendererProps: rendererPropsById });
+	let activeRenderer: RendererInstance | null = null;
+	let rendererExit: { id: string; result: unknown } | null = null;
+	let fatalErrorProps: RendererProps | null = null;
+	const requireActiveRenderer = () => {
+		if (!activeRenderer) {
+			throw new Error("Active renderer not initialized");
+		}
+		return activeRenderer;
+	};
+	const logSelectedRenderer = () => {
+		const current = requireActiveRenderer();
+		console.debug("[debug] renderer selected", current.id);
+	};
+	if (crashRecoverySession) {
+		console.debug("[debug] crash recovery mode", crashRecoverySession);
+	}
+	if (debugLogFile) {
+		console.debug("[debug] writing debug log to", debugLogFile);
+	}
+
+	const debugHud = createDebugHud(debugOptions);
+	const globalFps = createFpsCounter();
+	const rendererFps = createFpsCounter();
+
+	const getLayout = createLayoutCalculator({
+		baseWidth,
+		baseHeight,
+		viewWidth,
+		viewHeight
+	});
+
+	let bootUI = shouldRunBootSequence
+		? await createBootSequenceUI(baseWidth, baseHeight)
+		: null;
+	let bootAnswers: BootsequenceAnswers | null = null;
+	let contactComplete = false;
+
+	const rendererIds = Array.from(new Set(rendererRegistry.list().map((r) => r.id)));
+	let lastFrameMs = Date.now();
+	const requestRendererExit = () => {
+		const current = requireActiveRenderer();
+		if (rendererExit) return;
+		rendererExit = {
+			id: current.id,
+			result: current.getResult ? current.getResult() : undefined
+		};
+		renderer.requestStop();
+	};
+	const switchRenderer = (id: string) => {
+		if (activeRenderer && id === activeRenderer.id) return activeRenderer;
+		rendererExit = null;
+		const next = rendererRegistry.switchTo(id, rendererPropsById[id]);
+		renderer.ctx.clearRect(0, 0, renderer.canvas.width, renderer.canvas.height);
+		activeRenderer = next;
+		lastFrameMs = Date.now();
+		return activeRenderer;
+	};
+	activeRenderer = switchRenderer(defaultRendererId);
+	logSelectedRenderer();
+
+	if (cli.helpRequested) {
+		console.log(`Usage: bun run src/ui/app.ts [options]
+Options:
+  --renderer <id>       Select renderer by id (default: ${defaultRendererId})
+  --debug               Enable all debug HUD panels
+  --debug-global        Enable global debug HUD
+  --debug-renderer      Enable renderer debug HUD
+  --error-screen [msg]  Start on error screen (optional message)
+  --error-title <t>     Set error screen title
+  --error-hint <h>      Set error screen hint
+  --debug-log-file <path>  Write debug logs to file (default: ${DEFAULT_DEBUG_LOG_FILE})
+  --crash-recovery [id] Start in crash recovery mode (optional session id)
+  --help, -h            Show this help message`);
+		process.exit(0);
+	}
+
+	window.on("keyDown", (e) => {
+		const currentRenderer = requireActiveRenderer();
+		currentRenderer.handleKey?.(e.key ?? null);
+		bootUI?.handleKey({
+			key: e.key ?? null,
+			scancode: e.scancode ?? 0,
+			ctrl: e.ctrl ?? 0,
+			shift: e.shift ?? 0,
+			alt: e.alt ?? 0,
+			super: e.super ?? 0
+		});
+	});
+
+	const drawFrame = async (
+		_ctx: CanvasRenderingContext2D,
+		size: { width: number; height: number }
+	): Promise<void> => {
+		const currentRenderer = requireActiveRenderer();
+		const { ctx } = renderer;
+		ctx.imageSmoothingEnabled = false;
+		const layout = getLayout(size);
+		const {
+			width,
+			height,
+			contentScale,
+			x,
+			y
+		} = layout;
+		const now = Date.now();
+		const deltaMs = now - lastFrameMs;
+		lastFrameMs = now;
+		globalFps.tick(now);
+
+		ctx.clearRect(0, 0, width, height);
+
+		await currentRenderer.render({ ctx, deltaMs, layout });
+		rendererFps.tick(now);
+		if (currentRenderer.shouldExit?.()) {
+			if (currentRenderer.id === "recoverymenu") {
+				activeRenderer = switchRenderer("device_contact");
+				logSelectedRenderer();
+				if (!bootUI) {
+					bootUI = await createBootSequenceUI(baseWidth, baseHeight);
+				}
+			} else {
+				requestRendererExit();
+			}
+		}
+
+		// Text/UI layer: above BG/overlay, below FPS.
+		ctx.save();
+		const uiOffsetX = (contentScale - contentScale * uiScale) * baseWidth * 0.5;
+		const uiOffsetY = (contentScale - contentScale * uiScale) * baseHeight * 0.5;
+		ctx.translate(x + uiOffsetX, y + uiOffsetY);
+		ctx.scale(contentScale * uiScale, contentScale * uiScale);
+		if (bootUI) {
+			bootUI.update(deltaMs);
+			bootUI.render(ctx);
+			if (bootUI.isFinished()) {
+				if (!bootAnswers) {
+					bootAnswers = bootUI.getAnswers();
+				}
+				contactComplete = true;
+				renderer.requestStop();
+				window.Window.destroy();
+			}
+		}
+		ctx.restore();
+
+		debugHud.draw(ctx, layout, {
+			global: [
+				`${globalFps.value.toFixed(2)} FPS`,
+				`${window.Window.display.name ? (process.env.MONITOR_SN ? window.Window.display.name.replaceAll((process.env.MONITOR_SN || "") + " ", "") : window.Window.display.name) : "unknown"} ${window.Window.display.frequency}hz [${process.env.SDL_VIDEODRIVER ?? "sdl2"}]`,
+				`activeRenderer: ${currentRenderer.id}`,
+				`crashRecoverySession: ${crashRecoverySession ?? "none"}`,
+				`${BUNVERS}`
+			],
+			renderer: {
+				id: currentRenderer.id,
+				label: currentRenderer.label,
+				stats: {
+					...(currentRenderer.getDebugStats ? currentRenderer.getDebugStats() : {}),
+					...(currentRenderer.getDebugHudStats ? currentRenderer.getDebugHudStats() : {})
+				},
+				fps: rendererFps.value
+			},
+			custom: {
+				greetdSocket: GREETD_SOCKET,
+				tty: isTTY,
+				cage: isCage
+			}
+		});
+		if (debugLoggingEnabled) {
+			drawDebugLogs(ctx, layout, now);
+		}
+	};
+
+	console.debug("[debug] reached main");
+	try {
+		await renderer.run(drawFrame);
+		if (rendererExit) {
+			console.debug("[debug] renderer exit requested", rendererExit);
+		}
+	} finally {
+		requireActiveRenderer().unload();
+	}
+
+	if (contactComplete) {
+		const desktopHintRaw =
+			(bootAnswers as BootsequenceAnswers | null | undefined)?.desktop ??
+			crashRecoverySession ??
+			process.env.DESKTOP_SESSION_FRIENDLY_NAME ??
+			process.env.XDG_CURRENT_DESKTOP;
+		const desktopHint = typeof desktopHintRaw === "string" ? desktopHintRaw : undefined;
+		try {
+			await handoffToGreetd(desktopHint);
+		} catch (error) {
+			console.error("[ui/app] greetd handoff failed\n", error);
+			console.error("[ui/app] Press CTRL+ALT+F[0-9] to switch to a different VT");
+			if (process.env.NODE_ENV !== "development") {
+				process.exit(1);
+			}
+		}
+	}
+
+	if (fatalErrorProps) {
+		return
+	}
+
+	restoreDebug();
+}
+
+if (import.meta.main) {
+	await runDeviceContactUI();
+}
+
+type DebugLogEntry = {
+	message: string;
+	ts: number;
+};
+
+function debugHudOptionsEnabled(options: { showGlobal: boolean; showRenderer: boolean; showCustom?: boolean }) {
+	return options.showGlobal || options.showRenderer || Boolean(options.showCustom);
+}
+
+function hookDebugLogs(options?: { filePath?: string }): () => void {
+	const originalDebug = console.debug;
+	let logStream = createDebugLogStream(options?.filePath, originalDebug);
+	if (logStream) {
+		logStream.on("error", (error) => {
+			originalDebug("[debug] debug log stream error", error);
+			logStream?.destroy();
+			logStream = null;
+		});
+	}
+
+	console.debug = (...args: unknown[]) => {
+		const message = formatDebugMessage(args);
+		const now = Date.now();
+		debugLogEntries.push({ message, ts: now });
+		pruneOldLogs(now);
+		if (debugLogEntries.length > 100) {
+			debugLogEntries.splice(0, debugLogEntries.length - 100);
+		}
+		if (logStream) {
+			try {
+				logStream.write(`[${new Date(now).toISOString()}] ${message}\n`);
+			} catch (error) {
+				originalDebug("[debug] failed to write debug log to file", error);
+				logStream = null;
+			}
+		}
+		originalDebug(...args);
+	};
+	return () => {
+		console.debug = originalDebug;
+		debugLogEntries.length = 0;
+		if (logStream) {
+			logStream.end();
+			logStream = null;
+		}
+	};
+}
+
+function formatDebugMessage(args: unknown[]): string {
+	return args
+		.map((arg) => {
+			if (typeof arg === "string") return arg;
+			if (arg instanceof Error) {
+				return `${arg.name}: ${arg.message}`;
+			}
+			try {
+				return JSON.stringify(arg, (_k, v) => {
+					if (typeof v === "bigint") return v.toString();
+					return v;
+				});
+			} catch {
+				return String(arg);
+			}
+		})
+		.join(" ");
+}
+
+function drawDebugLogs(ctx: CanvasRenderingContext2D, layout: { width: number; height: number }, now: number) {
+	const padding = 8;
+	const lineHeight = 18;
+	pruneOldLogs(now);
+	const visible = debugLogEntries.slice(-LOG_MAX_LINES);
+	if (visible.length === 0) return;
+
+	ctx.save();
+	ctx.font = "14px \"JetBrains Mono\", monospace";
+	ctx.textBaseline = "bottom";
+
+	let cursorY = layout.height - padding;
+	const cursorX = padding;
+
+	for (const entry of [...visible].reverse()) {
+		const age = now - entry.ts;
+		const fadeStart = LOG_LIFETIME_MS - LOG_FADE_MS;
+		const alpha = age <= fadeStart ? 1 : Math.max(0, (LOG_LIFETIME_MS - age) / LOG_FADE_MS);
+		const text = entry.message;
+
+		ctx.globalAlpha = alpha;
+		ctx.fillStyle = "#66ccff";
+		ctx.fillText(text, cursorX, cursorY);
+		cursorY -= lineHeight;
+	}
+
+	ctx.restore();
+}
+
+function pruneOldLogs(now: number) {
+	for (let i = debugLogEntries.length - 1; i >= 0; i--) {
+		if (now - debugLogEntries[i]!.ts >= LOG_LIFETIME_MS) {
+			debugLogEntries.splice(i, 1);
+		}
+	}
+}
+
+async function runErrorScreen(
+	props: RendererProps,
+	options?: { debugOptions?: { showGlobal: boolean; showRenderer: boolean; showCustom?: boolean } }
+) {
+	const isTTY = process.env.SDL_VIDEODRIVER === "kmsdrm";
+	const isCage = process.env.IS_CAGE === "true";
+	const windowOptions = {
+		// DO NOT CHANGE TITLE
+		title: "DEVICE CONTACT (DELTARUNE Chapter 1)",
+		width: 1920,
+		height: 1080,
+		fullscreen: true
+	};
+	const window = new SDLWindow(windowOptions);
+	window.Window.setFullscreen(true);
+	if (!isTTY && !isCage) {
+		window.on("keyUp", (e) => {
+			if (e.key === "f11") {
+				window.Window.setFullscreen(!window.Window.fullscreen);
+			}
+		});
+	}
+	const icon = await loadImageAsset("icon.png");
+	window.setIconFromImage(icon);
+	window.Window.setResizable(true);
+	window.Window.setAccelerated(true);
+
+	const renderer = createRenderer({ window });
+	const rendererRegistry = createRendererRegistry({ rendererProps: { errormessage: props } });
+	let activeRenderer: RendererInstance | null = rendererRegistry.switchTo("errormessage");
+	let rendererExit: { id: string; result: unknown } | null = null;
+	const requestRendererExit = () => {
+		const current = activeRenderer;
+		if (!current || rendererExit) return;
+		rendererExit = {
+			id: current.id,
+			result: current.getResult ? current.getResult() : undefined
+		};
+		renderer.requestStop();
+	};
+	window.on("keyDown", (e) => {
+		activeRenderer?.handleKey?.(e.key ?? null);
+	});
+
+	const baseWidth = 160;
+	const baseHeight = 120;
+	const viewWidth = 1280;
+	const viewHeight = 960;
+	const uiScale = 0.6;
+	const getLayout = createLayoutCalculator({
+		baseWidth,
+		baseHeight,
+		viewWidth,
+		viewHeight
+	});
+	const debugHud = createDebugHud(
+		options?.debugOptions ?? {
+			showGlobal: true,
+			showRenderer: true,
+			showCustom: true
+		}
+	);
+	const globalFps = createFpsCounter();
+	const rendererFps = createFpsCounter();
+	let lastFrameMs = Date.now();
+
+	const drawFrame = async (_ctx: CanvasRenderingContext2D, size: { width: number; height: number }) => {
+		const currentRenderer = activeRenderer!;
+		const { ctx } = renderer;
+		ctx.imageSmoothingEnabled = false;
+		const layout = getLayout(size);
+		const { width, height, contentScale, x, y } = layout;
+		const now = Date.now();
+		const deltaMs = now - lastFrameMs;
+		lastFrameMs = now;
+		globalFps.tick(now);
+
+		ctx.clearRect(0, 0, width, height);
+
+		await currentRenderer.render({ ctx, deltaMs, layout });
+		rendererFps.tick(now);
+		if (currentRenderer.shouldExit?.()) {
+			requestRendererExit();
+		}
+
+		ctx.save();
+		const uiOffsetX = (contentScale - contentScale * uiScale) * baseWidth * 0.5;
+		const uiOffsetY = (contentScale - contentScale * uiScale) * baseHeight * 0.5;
+		ctx.translate(x + uiOffsetX, y + uiOffsetY);
+		ctx.scale(contentScale * uiScale, contentScale * uiScale);
+		ctx.restore();
+
+		debugHud.draw(ctx, layout, {
+			global: [
+				`${globalFps.value.toFixed(2)} FPS`,
+				`${window.Window.display.name ? (process.env.MONITOR_SN ? window.Window.display.name.replaceAll((process.env.MONITOR_SN || "") + " ", "") : window.Window.display.name) : "unknown"} ${window.Window.display.frequency}hz [${process.env.SDL_VIDEODRIVER ?? "sdl2"}]`,
+				`activeRenderer: ${currentRenderer.id}`,
+				`${BUNVERS}`
+			],
+			renderer: {
+				id: currentRenderer.id,
+				label: currentRenderer.label,
+				stats: {
+					...(currentRenderer.getDebugStats ? currentRenderer.getDebugStats() : {}),
+					...(currentRenderer.getDebugHudStats ? currentRenderer.getDebugHudStats() : {})
+				},
+				fps: rendererFps.value
+			},
+			custom: {
+				greetdSocket: GREETD_SOCKET,
+				tty: isTTY,
+				cage: isCage
+			}
+		});
+		if (debugHudOptionsEnabled(options?.debugOptions ?? { showGlobal: true, showRenderer: true, showCustom: true })) {
+			drawDebugLogs(ctx, layout, now);
+		}
+	};
+
+	await renderer.run(drawFrame);
+	if (rendererExit) {
+		console.debug("[debug] error renderer exit requested", rendererExit);
+	}
+	activeRenderer?.unload();
+}
+
+function createDebugLogStream(filePath: string | undefined, debug: typeof console.debug) {
+	if (!filePath) return null;
+	try {
+		mkdirSync(dirname(filePath), { recursive: true });
+		return createWriteStream(filePath, { flags: "a" });
+	} catch (error) {
+		debug("[debug] failed to open debug log file", { filePath, error });
+		return null;
+	}
+}

tsconfig.json

@@ -0,0 +1,22 @@
+{
+	"compilerOptions": {
+		"lib": ["ESNext"],
+		"target": "ESNext",
+		"module": "Preserve",
+		"moduleDetection": "force",
+		"jsx": "react-jsx",
+		"allowJs": true,
+		"moduleResolution": "bundler",
+		"allowImportingTsExtensions": true,
+		"verbatimModuleSyntax": true,
+		"noEmit": true,
+		"strict": true,
+		"skipLibCheck": true,
+		"noFallthroughCasesInSwitch": true,
+		"noUncheckedIndexedAccess": true,
+		"noImplicitOverride": true,
+		"noUnusedLocals": false,
+		"noUnusedParameters": false,
+		"noPropertyAccessFromIndexSignature": false
+	}
+}

tty.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+export SDL_VIDEODRIVER=kmsdrm
+export SDL_KMSDRM_HWCURSOR=0
+export SDL_HINT_RENDER_SCALE_QUALITY=0
+export NODE_ENV=development
+bun run src/ui/app.ts