feat: бинокулярный видеорендер в app-glasses + иммерсивный режим + тест-план

- render/: Grafika-связка (EglCore/WindowSurface/FullFrameRect/Texture2dProgram/GlUtil/Drawable2d/EglSurfaceBase) — перенос из pair-view
- ui/BinocularVideoPlayer: один SimpleExoPlayer → SurfaceTexture → EGL-блит в оба глаза (EglVideoRenderer шарится между LEFT/RIGHT)
- ui/ViewUtils: Binocular/BinocularScreenSide/BinocularScreenSize (Compose, из pair-view)
- ui/GlassesMovieScreen: «нос к носу», calculateVideoSizeFull, FLAG_KEEP_SCREEN_ON
- MovieController: PlayVideo/MediaCommand (PLAY/PAUSE/TOGGLE/SEEK/CLOSE), доступ к ExoPlayer только с main-потока
- HostConnection: PlayVideo→плеер, реальная позиция в PlaybackPosition (withContext Main)
- MainActivity: иммерсивный режим (setDecorFitsSystemWindows(false) + hide systemBars)
- TESTING.md: 10 тест-кейсов human-style; QA-прогон (opencode, 88.19) — 10/10 ПРОЙДЕН

TESTING.md

@@ -0,0 +1,189 @@
+# TESTING.md — view-mate, app-glasses (очки RayNeo X2)
+
+Тест-план для стенда (88.19): AVD `glasses35` (emulator-5554, 1280×480), app-host на :8080
+(консоль FIFO `/tmp/host.in`, лог `/tmp/host.log`), http.server :8081 с `test-video.mp4`,
+APK `pw.binom.viewmate.glasses` установлен.
+
+Кейсы написаны человеческим языком, без координат. Координаты/точные значения агент
+добывает сам (скрины, logcat, uiautomator). «Консоль хоста» = FIFO `/tmp/host.in`
+(команды: `play <url>`, `mode <MODE>`, `cmd <CMD> [ms]`, `catalog`, `watch`, `mirror`).
+
+## Общие предусловия
+
+- Стенд поднят: app-host слушает :8080, http.server :8081, AVD загружен
+- Приложение очков установлено (последняя сборка) и запущено
+- Logcat очищен перед кейсом (`adb logcat -c`)
+
+---
+
+## TC-01 Подключение очков к серверу
+
+**Предусловия:** app-host запущен и слушает :8080.
+
+**Шаги:**
+1. Запусти приложение очков (launch `pw.binom.viewmate.glasses/.MainActivity`)
+2. Подожди 5–10 секунд
+3. Посмотри на экран очков (скрин)
+4. Загляни в лог приложения (logcat) и в лог хоста
+
+**Ожидаемо:**
+- На экране статус «подключено к телефону» (ConnectionScreen, без системных панелей)
+- В logcat: «соединение установлено», «Welcome: режим MOVIE...»
+- В `/tmp/host.log` приходят периодические `glasses статус: батарея 80%...`
+- Крашей и ошибок нет
+
+---
+
+## TC-02 Воспроизведение тестового видео (play по прямому URL)
+
+**Предусловия:** TC-01 пройден.
+
+**Шаги:**
+1. Через консоль хоста пошли: `play http://10.0.2.2:8081/test-video.mp4`
+2. Подожди 5–10 секунд
+3. Сними скрин экрана очков
+4. Проверь logcat и лог хоста
+
+**Ожидаемо:**
+- В обеих половинах экрана (левой и правой) — **одинаковое** видеоизображение
+  (движущийся тестовый паттерн: цветные полосы, сетка)
+- В logcat: «получено видео», «SimpleExoPlayer создан», «EglVideoRenderer: GL-стэйт создан»
+- Крашей нет; процесс жив
+
+---
+
+## TC-03 Воспроизведение видео из живого Jellyfin
+
+**Предусловия:** TC-01 пройден. Живой стрим-URL (например, фильм «Акира»:
+`https://jellyfin.binom.pw/Videos/a3ca9fbf926fe9f60448f591ea945ac8/stream?static=true&MediaSourceId=a3ca9fbf926fe9f60448f591ea945ac8&api_key=59e6380a96a94364ae25d2b7cf9f1359`).
+
+**Шаги:**
+1. Через консоль хоста пошли: `play <jellyfin-url>`
+2. Подожди 10–15 секунд (стрим с сетевой задержкой)
+3. Сними скрин экрана очков
+4. Проверь logcat: ошибок загрузки быть не должно (если была ошибка — проверь, что приложение не упало)
+
+**Ожидаемо:**
+- На экране кадр фильма (не чёрный экран), одинаковый в обеих половинах
+- Приложение живо, крашей нет
+- В логе хоста позиция растёт
+
+---
+
+## TC-04 Полноэкранный режим (без системных панелей)
+
+**Предусловия:** приложение запущено (любой экран: статус или кино).
+
+**Шаги:**
+1. Посмотри на экран очков (скрин) — и на статус-экране, и во время кино
+2. Убедись, что сверху нет системной панели (часы, зарядка, иконки)
+3. Убедись, что снизу нет навигационной панели
+
+**Ожидаемо:**
+- Системные панели скрыты: приложение занимает весь экран 1280×480
+- Даже после паузы/воспроизведения панели не появляются сами
+- ⚠️ При первом входе в иммерсивный режим система может показать разовый оверлей
+  «Viewing full screen / To exit, swipe down... [Got it]» — это НЕ баг приложения,
+  это системная подсказка. Нажми «Got it» (или свайпни) и проверь, что панели скрыты.
+
+---
+
+## TC-05 Пауза и продолжение (media PAUSE / PLAY)
+
+**Предусловия:** TC-02 пройден (видео играет).
+
+**Шаги:**
+1. Через консоль хоста пошли: `cmd PAUSE`
+2. Подожди 3–5 секунд
+3. Проверь лог хоста (позиция) и сними скрин
+4. Через консоль пошли: `cmd PLAY`
+5. Подожди 3–5 секунд, снова проверь лог хоста
+
+**Ожидаемо:**
+- После PAUSE: в логе хоста `позиция: N мс, пауза` (playing=false), позиция не растёт
+- После PLAY: позиция снова растёт (playing=true)
+- Кадр на экране не меняется на паузе (стоп-кадр)
+
+---
+
+## TC-06 Перемотка вперёд (media SEEK_FWD)
+
+**Предусловия:** TC-02 пройден.
+
+**Шаги:**
+1. Запомни текущую позицию из лога хоста
+2. Через консоль пошли: `cmd SEEK_FORWARD 10000`
+3. Подожди 3–5 секунд
+4. Проверь позицию в логе хоста
+
+**Ожидаемо:**
+- Позиция выросла примерно на 10 секунд относительно запомненной
+- Видео продолжает играть, крашей нет
+
+---
+
+## TC-07 Закрытие фильма (media CLOSE)
+
+**Предусловия:** TC-02 пройден.
+
+**Шаги:**
+1. Через консоль пошли: `cmd CLOSE`
+2. Подожди 3–5 секунд
+3. Посмотри на экран очков (скрин)
+4. Проверь лог хоста (позиция)
+
+**Ожидаемо:**
+- Экран вернулся на статус-экран (ConnectionScreen)
+- Позиция сброшена (0 мс / нет плеера)
+- В logcat: «CLOSE: плеер остановлен и освобождён» (или эквивалент)
+- Приложение живо
+
+---
+
+## TC-08 Ошибка загрузки (битый URL) — приложение не падает
+
+**Предусловия:** TC-01 пройден.
+
+**Шаги:**
+1. Через консоль хоста пошли: `play http://10.0.2.2:8081/nonexistent.mp4`
+2. Подожди 10–15 секунд
+3. Проверь logcat и живость процесса
+4. Сними скрин
+
+**Ожидаемо:**
+- В logcat ошибка загрузки (ExoPlaybackException / 404), НО:
+- Приложение живо (pid существует), краша нет
+- Экран не «завис» — можно вернуться в рабочее состояние командой `play <валидный url>`
+
+---
+
+## TC-09 Реконнект при обрыве связи
+
+**Предусловия:** TC-01 пройден.
+
+**Шаги:**
+1. Останови app-host (убить процесс) — очки потеряют сервер
+2. Подожди 10–15 секунд
+3. Проверь logcat (сообщение о разрыве/реконнекте)
+4. Запусти app-host заново
+5. Подожди 10–15 секунд
+6. Проверь logcat и экран
+
+**Ожидаемо:**
+- При обрыве: в logcat сообщение о потере соединения, приложение живо
+- После подъёма хоста: «соединение установлено» снова, Welcome получен
+- Повторный `play` работает
+
+---
+
+## TC-10 Статус очков уходит на хост
+
+**Предусловия:** TC-01 пройден, видео играет.
+
+**Шаги:**
+1. Подожди 10–15 секунд
+2. Загляни в `/tmp/host.log`
+
+**Ожидаемо:**
+- В логе периодически (раз в ~5 секунд): `glasses статус: батарея 80%, память 10.5/32.0 ГБ`
+- И `glasses позиция: NNN мс, играет/пауза` с реально растущей позицией во время воспроизведения

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/GlassesApp.kt

@@ -17,10 +17,14 @@ class GlassesApp : Application() {
     lateinit var hostConnection: HostConnection
         private set
 
+    lateinit var movieController: MovieController
+        private set
+
     override fun onCreate() {
         super.onCreate()
         instance = this
-        hostConnection = HostConnection(GlassesConfig.HOST_URL)
+        movieController = MovieController(applicationContext)
+        hostConnection = HostConnection(GlassesConfig.HOST_URL, movieController)
         hostConnection.start()
         log("app", "HostConnection стартует: ${GlassesConfig.HOST_URL}")
     }

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/HostConnection.kt

@@ -7,6 +7,7 @@ import kotlinx.coroutines.cancel
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
@@ -26,10 +27,11 @@ import pw.binom.viewmate.core.protocol.Welcome
 /**
  * Обвязка над [GlassesWsClient] для UI очков:
  * реконнект, Hello при подключении, периодический статус/позиция,
- * обработка входящих HostToGlasses в StateFlow (пока — лог).
+ * обработка входящих HostToGlasses (PlayVideo/MediaCommand выполняются плеером).
  */
 class HostConnection(
     private val url: String,
+    private val movieController: MovieController,
 ) {
     private val client = GlassesWsClient(url)
     private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
@@ -62,9 +64,10 @@ class HostConnection(
         scope.launch {
             while (isActive) {
                 delay(5_000)
-                // статус/позиция — заглушки (реальные батарея/память/таймкод — позже)
+                // статус/позиция — заглушки (реальные батарея/память — позже)
                 client.send(GlassesStatus(batteryPercent = 80, storageUsedGb = 10.5, storageTotalGb = 32.0))
-                client.send(PlaybackPosition(positionMs = 0, playing = false))
+                val (positionMs, playing) = withContext(Dispatchers.Main) { movieController.playbackPosition() }
+                client.send(PlaybackPosition(positionMs = positionMs, playing = playing))
             }
         }
     }
@@ -78,9 +81,15 @@ class HostConnection(
 
             is SetMode -> addMessage("SetMode: ${msg.mode}")
 
-            is PlayVideo -> addMessage("получено видео: «${msg.title}» — ${msg.videoUrl}")
+            is PlayVideo -> {
+                addMessage("получено видео: «${msg.title}» — ${msg.videoUrl}")
+                movieController.playVideo(msg)
+            }
 
-            is MediaCommandMsg -> addMessage("MediaCommand: ${msg.command} (seekMs=${msg.seekMs})")
+            is MediaCommandMsg -> {
+                addMessage("MediaCommand: ${msg.command} (seekMs=${msg.seekMs})")
+                movieController.applyMediaCommand(msg.command, msg.seekMs)
+            }
 
             is AssistantStateMsg -> addMessage("AssistantState: ${msg.state} (${msg.recordingSeconds}с)")
 

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/MainActivity.kt

@@ -3,6 +3,9 @@ package pw.binom.viewmate.glasses
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.core.view.WindowCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.WindowInsetsControllerCompat
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
@@ -17,16 +20,43 @@ import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
+import pw.binom.viewmate.glasses.ui.GlassesMovieScreen
 
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        WindowCompat.setDecorFitsSystemWindows(window, false)
         setContent {
             MaterialTheme {
+                val controller = GlassesApp.instance.movieController
+                val movieActive by controller.movieActive.collectAsState()
+                val title by controller.title.collectAsState()
+                val player = controller.player
+                if (movieActive && player != null) {
+                    GlassesMovieScreen(player = player, title = title)
+                } else {
                     ConnectionScreen()
                 }
             }
         }
+        hideSystemBars()
+        log("ui", "иммерсивный режим включён")
+    }
+
+    override fun onResume() {
+        super.onResume()
+        hideSystemBars()
+    }
+
+    private fun hideSystemBars() {
+        window.decorView.post {
+            WindowInsetsControllerCompat(window, window.decorView).apply {
+                hide(WindowInsetsCompat.Type.systemBars())
+                systemBarsBehavior =
+                    WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
+            }
+        }
+    }
 }
 
 @Composable

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/MovieController.kt

@@ -0,0 +1,102 @@
+package pw.binom.viewmate.glasses
+
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import com.google.android.exoplayer2.MediaItem
+import com.google.android.exoplayer2.SimpleExoPlayer
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import pw.binom.viewmate.core.MediaCommand
+import pw.binom.viewmate.core.protocol.PlayVideo
+
+/**
+ * Держатель плеера фильма: создаёт/освобождает SimpleExoPlayer,
+ * выполняет команды из WS-протокола. Сам плеер создаётся только по PlayVideo.
+ */
+class MovieController(private val context: Context) {
+
+    private val _movieActive = MutableStateFlow(false)
+    val movieActive: StateFlow<Boolean> = _movieActive.asStateFlow()
+
+    private val _title = MutableStateFlow<String?>(null)
+    val title: StateFlow<String?> = _title.asStateFlow()
+
+    private var _player: SimpleExoPlayer? = null
+    val player: SimpleExoPlayer? get() = _player
+
+    private val mainHandler = Handler(Looper.getMainLooper())
+
+    fun playVideo(msg: PlayVideo) {
+        mainHandler.post {
+            val player = _player ?: SimpleExoPlayer.Builder(context).build().also {
+                _player = it
+                log("glasses", "SimpleExoPlayer создан")
+            }
+            _title.value = msg.title
+            log("glasses", "PlayVideo: «${msg.title}» — ${msg.videoUrl}")
+            player.setMediaItem(MediaItem.fromUri(msg.videoUrl))
+            player.prepare()
+            player.seekTo(msg.startPositionMs)
+            player.playWhenReady = true
+            _movieActive.value = true
+        }
+    }
+
+    fun applyMediaCommand(command: MediaCommand, seekMs: Long) {
+        mainHandler.post {
+            val player = _player ?: run {
+                log("glasses", "MediaCommand $command проигнорирован: плеер не активен")
+                return@post
+            }
+            when (command) {
+                MediaCommand.PLAY -> player.play()
+
+                MediaCommand.PAUSE -> player.pause()
+
+                MediaCommand.TOGGLE -> {
+                    if (player.isPlaying) player.pause() else player.play()
+                }
+
+                MediaCommand.SEEK_FORWARD -> {
+                    val target = player.currentPosition + seekMs
+                    player.seekTo(target)
+                }
+
+                MediaCommand.SEEK_BACKWARD -> {
+                    val target = (player.currentPosition - seekMs).coerceAtLeast(0L)
+                    player.seekTo(target)
+                }
+
+                // Звук — на телефоне, переключение аудио-дорожек очкам не нужно.
+                MediaCommand.NEXT_AUDIO, MediaCommand.PREV_AUDIO -> {
+                    log("glasses", "MediaCommand $command игнорируется (звук на телефоне)")
+                }
+
+                MediaCommand.CLOSE -> close()
+            }
+        }
+    }
+
+    fun close() {
+        mainHandler.post {
+            val player = _player
+            _player = null
+            if (player != null) {
+                log("glasses", "CLOSE: плеер остановлен и освобождён")
+                player.playWhenReady = false
+                player.stop()
+                player.release()
+            }
+            _movieActive.value = false
+            _title.value = null
+        }
+    }
+
+    /** Читать ТОЛЬКО с главного потока. */
+    fun playbackPosition(): Pair<Long, Boolean> {
+        val player = _player ?: return 0L to false
+        return player.currentPosition to player.isPlaying
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/render/Drawable2d.kt

@@ -0,0 +1,180 @@
+package pw.binom.viewmate.glasses.render
+
+import java.nio.FloatBuffer
+
+class Drawable2d(shape: Prefab) {
+    companion object {
+        private const val SIZEOF_FLOAT: Int = 4
+
+        /**
+         * Simple equilateral triangle (1.0 per side).  Centered on (0,0).
+         */
+        private val TRIANGLE_COORDS: FloatArray = floatArrayOf(
+            0.0f, 0.577350269f,  // 0 top
+            -0.5f, -0.288675135f,  // 1 bottom left
+            0.5f, -0.288675135f // 2 bottom right
+        )
+
+        private val TRIANGLE_TEX_COORDS: FloatArray = floatArrayOf(
+            0.5f, 0.0f,  // 0 top center
+            0.0f, 1.0f,  // 1 bottom left
+            1.0f, 1.0f,  // 2 bottom right
+        )
+
+        private val TRIANGLE_BUF: FloatBuffer = GlUtil.createFloatBuffer(TRIANGLE_COORDS)
+
+        private val TRIANGLE_TEX_BUF = GlUtil.createFloatBuffer(TRIANGLE_TEX_COORDS)
+
+        /**
+         * Simple square, specified as a triangle strip.  The square is centered on (0,0) and has
+         * a size of 1x1.
+         *
+         * Triangles are 0-1-2 and 2-1-3 (counter-clockwise winding).
+         */
+        private val RECTANGLE_COORDS = floatArrayOf(
+            -0.5f, -0.5f,  // 0 bottom left
+            0.5f, -0.5f,  // 1 bottom right
+            -0.5f, 0.5f,  // 2 top left
+            0.5f, 0.5f,  // 3 top right
+        )
+
+        private val RECTANGLE_TEX_COORDS = floatArrayOf(
+            0.0f, 1.0f,  // 0 bottom left
+            1.0f, 1.0f,  // 1 bottom right
+            0.0f, 0.0f,  // 2 top left
+            1.0f, 0.0f // 3 top right
+        )
+
+        private val RECTANGLE_BUF = GlUtil.createFloatBuffer(RECTANGLE_COORDS)
+
+        private val RECTANGLE_TEX_BUF = GlUtil.createFloatBuffer(RECTANGLE_TEX_COORDS)
+
+        /**
+         * A "full" square, extending from -1 to +1 in both dimensions.  When the model/view/projection
+         * matrix is identity, this will exactly cover the viewport.
+         *
+         * The texture coordinates are Y-inverted relative to RECTANGLE.  (This seems to work out
+         * right with external textures from SurfaceTexture.)
+         */
+        private val FULL_RECTANGLE_COORDS = floatArrayOf(
+            -1.0f, -1.0f,  // 0 bottom left
+            1.0f, -1.0f,  // 1 bottom right
+            -1.0f, 1.0f,  // 2 top left
+            1.0f, 1.0f,  // 3 top right
+        )
+
+        private val FULL_RECTANGLE_TEX_COORDS = floatArrayOf(
+            0.0f, 0.0f,  // 0 bottom left
+            1.0f, 0.0f,  // 1 bottom right
+            0.0f, 1.0f,  // 2 top left
+            1.0f, 1.0f // 3 top right
+        )
+
+        private val FULL_RECTANGLE_BUF = GlUtil.createFloatBuffer(FULL_RECTANGLE_COORDS)
+
+        private val FULL_RECTANGLE_TEX_BUF = GlUtil.createFloatBuffer(FULL_RECTANGLE_TEX_COORDS)
+    }
+
+    val mVertexArray: FloatBuffer
+    val mTexCoordArray: FloatBuffer
+
+    private var mPrefab: Prefab? = null
+    val mVertexCount: Int
+    val mCoordsPerVertex: Int
+    val mVertexStride: Int
+    val mTexCoordStride: Int
+
+    /**
+     * Enum values for constructor.
+     */
+    enum class Prefab {
+        TRIANGLE, RECTANGLE, FULL_RECTANGLE
+    }
+
+    /**
+     * Prepares a drawable from a "pre-fabricated" shape definition.
+     *
+     * Does no EGL/GL operations, so this can be done at any time.
+     */
+    init {
+        when (shape) {
+            Prefab.TRIANGLE -> {
+                mVertexArray = TRIANGLE_BUF
+                mTexCoordArray = TRIANGLE_TEX_BUF
+                mCoordsPerVertex = 2
+                mVertexStride = mCoordsPerVertex * SIZEOF_FLOAT
+                mVertexCount = TRIANGLE_COORDS.size / mCoordsPerVertex
+            }
+
+            Prefab.RECTANGLE -> {
+                mVertexArray = RECTANGLE_BUF
+                mTexCoordArray = RECTANGLE_TEX_BUF
+                mCoordsPerVertex = 2
+                mVertexStride = mCoordsPerVertex * SIZEOF_FLOAT
+                mVertexCount = RECTANGLE_COORDS.size / mCoordsPerVertex
+            }
+
+            Prefab.FULL_RECTANGLE -> {
+                mVertexArray = FULL_RECTANGLE_BUF
+                mTexCoordArray = FULL_RECTANGLE_TEX_BUF
+                mCoordsPerVertex = 2
+                mVertexStride = mCoordsPerVertex * SIZEOF_FLOAT
+                mVertexCount = FULL_RECTANGLE_COORDS.size / mCoordsPerVertex
+            }
+
+            else -> throw RuntimeException("Unknown shape $shape")
+        }
+        mTexCoordStride = 2 * SIZEOF_FLOAT
+        mPrefab = shape
+    }
+
+    /**
+     * Returns the array of vertices.
+     *
+     * To avoid allocations, this returns internal state.  The caller must not modify it.
+     */
+    fun getVertexArray() = mVertexArray
+
+    /**
+     * Returns the array of texture coordinates.
+     *
+     * To avoid allocations, this returns internal state.  The caller must not modify it.
+     */
+    fun getTexCoordArray() = mTexCoordArray
+
+    /**
+     * Returns the number of vertices stored in the vertex array.
+     */
+    fun getVertexCount(): Int {
+        return mVertexCount
+    }
+
+    /**
+     * Returns the width, in bytes, of the data for each vertex.
+     */
+    fun getVertexStride(): Int {
+        return mVertexStride
+    }
+
+    /**
+     * Returns the width, in bytes, of the data for each texture coordinate.
+     */
+    fun getTexCoordStride(): Int {
+        return mTexCoordStride
+    }
+
+    /**
+     * Returns the number of position coordinates per vertex.  This will be 2 or 3.
+     */
+    fun getCoordsPerVertex(): Int {
+        return mCoordsPerVertex
+    }
+
+    override fun toString(): String {
+        return if (mPrefab != null) {
+            "[Drawable2d: $mPrefab]"
+        } else {
+            "[Drawable2d: ...]"
+        }
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/render/EglCore.kt

@@ -0,0 +1,348 @@
+package pw.binom.viewmate.glasses.render
+
+import android.graphics.SurfaceTexture
+import android.opengl.EGL14
+import android.opengl.EGLConfig
+import android.opengl.EGLContext
+import android.opengl.EGLDisplay
+import android.opengl.EGLExt
+import android.opengl.EGLSurface
+import android.view.Surface
+import pw.binom.viewmate.glasses.log
+
+class EglCore {
+    companion object {
+        const val TAG = "GlUtil"
+
+        /**
+         * Constructor flag: surface must be recordable.  This discourages EGL from using a
+         * pixel format that cannot be converted efficiently to something usable by the video
+         * encoder.
+         */
+        const val FLAG_RECORDABLE: Int = 0x01
+
+        /**
+         * Constructor flag: ask for GLES3, fall back to GLES2 if not available.  Without this
+         * flag, GLES2 is used.
+         */
+        const val FLAG_TRY_GLES3: Int = 0x02
+
+        // Android-specific extension.
+        const val EGL_RECORDABLE_ANDROID: Int = 0x3142
+    }
+
+    private var mEGLDisplay: EGLDisplay? = EGL14.EGL_NO_DISPLAY
+    private var mEGLContext: EGLContext = EGL14.EGL_NO_CONTEXT
+    private var mEGLConfig: EGLConfig? = null
+    private var mGlVersion = -1
+
+    /**
+     * Prepares EGL display and context.
+     *
+     * Equivalent to EglCore(null, 0).
+     */
+    constructor() : this(null, 0) {
+    }
+
+    /**
+     * Prepares EGL display and context.
+     *
+     * @param sharedContext The context to share, or null if sharing is not desired.
+     * @param flags Configuration bit flags, e.g. FLAG_RECORDABLE.
+     */
+    constructor(sharedContext: EGLContext?, flags: Int) {
+        var sharedContext: EGLContext? = sharedContext
+        if (mEGLDisplay !== EGL14.EGL_NO_DISPLAY) {
+            throw RuntimeException("EGL already set up")
+        }
+
+        if (sharedContext == null) {
+            sharedContext = EGL14.EGL_NO_CONTEXT
+        }
+
+        mEGLDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY)
+        if (mEGLDisplay === EGL14.EGL_NO_DISPLAY) {
+            throw RuntimeException("unable to get EGL14 display")
+        }
+        val version = IntArray(2)
+        if (!EGL14.eglInitialize(mEGLDisplay, version, 0, version, 1)) {
+            mEGLDisplay = null
+            throw RuntimeException("unable to initialize EGL14")
+        }
+
+        // Try to get a GLES3 context, if requested.
+        if ((flags and FLAG_TRY_GLES3) != 0) {
+            val config: EGLConfig? = getConfig(flags, 3)
+            if (config != null) {
+                val attrib3_list = intArrayOf(
+                    EGL14.EGL_CONTEXT_CLIENT_VERSION, 3,
+                    EGL14.EGL_NONE
+                )
+                val context: EGLContext = EGL14.eglCreateContext(
+                    mEGLDisplay, config, sharedContext,
+                    attrib3_list, 0
+                )
+
+                if (EGL14.eglGetError() == EGL14.EGL_SUCCESS) {
+                    mEGLConfig = config
+                    mEGLContext = context
+                    mGlVersion = 3
+                }
+            }
+        }
+        if (mEGLContext === EGL14.EGL_NO_CONTEXT) {  // GLES 2 only, or GLES 3 attempt failed
+            val config: EGLConfig = getConfig(flags, 2)
+                ?: throw RuntimeException("Unable to find a suitable EGLConfig")
+            val attrib2_list = intArrayOf(
+                EGL14.EGL_CONTEXT_CLIENT_VERSION, 2,
+                EGL14.EGL_NONE
+            )
+            val context: EGLContext = EGL14.eglCreateContext(
+                mEGLDisplay, config, sharedContext,
+                attrib2_list, 0
+            )
+            checkEglError("eglCreateContext")
+            mEGLConfig = config
+            mEGLContext = context
+            mGlVersion = 2
+        }
+
+        // Confirm with query.
+        val values = IntArray(1)
+        EGL14.eglQueryContext(
+            mEGLDisplay, mEGLContext, EGL14.EGL_CONTEXT_CLIENT_VERSION,
+            values, 0
+        )
+        log(TAG, "EGLContext created, client version " + values[0])
+    }
+
+    /**
+     * Finds a suitable EGLConfig.
+     *
+     * @param flags Bit flags from constructor.
+     * @param version Must be 2 or 3.
+     */
+    private fun getConfig(flags: Int, version: Int): EGLConfig? {
+        var renderableType = EGL14.EGL_OPENGL_ES2_BIT
+        if (version >= 3) {
+            renderableType = renderableType or EGLExt.EGL_OPENGL_ES3_BIT_KHR
+        }
+
+        // The actual surface is generally RGBA or RGBX, so situationally omitting alpha
+        // doesn't really help.  It can also lead to a huge performance hit on glReadPixels()
+        // when reading into a GL_RGBA buffer.
+        val attribList = intArrayOf(
+            EGL14.EGL_RED_SIZE, 8,
+            EGL14.EGL_GREEN_SIZE, 8,
+            EGL14.EGL_BLUE_SIZE, 8,
+            EGL14.EGL_ALPHA_SIZE, 8,  //EGL14.EGL_DEPTH_SIZE, 16,
+            //EGL14.EGL_STENCIL_SIZE, 8,
+            EGL14.EGL_RENDERABLE_TYPE, renderableType,
+            EGL14.EGL_NONE, 0,  // placeholder for recordable [@-3]
+            EGL14.EGL_NONE
+        )
+        if ((flags and FLAG_RECORDABLE) != 0) {
+            attribList[attribList.size - 3] = EGL_RECORDABLE_ANDROID
+            attribList[attribList.size - 2] = 1
+        }
+        val configs: Array<EGLConfig?> = arrayOfNulls<EGLConfig>(1)
+        val numConfigs = IntArray(1)
+        if (!EGL14.eglChooseConfig(
+                mEGLDisplay, attribList, 0, configs, 0, configs.size,
+                numConfigs, 0
+            )
+        ) {
+            log(TAG, "unable to find RGB8888 / $version EGLConfig")
+            return null
+        }
+        return configs[0]
+    }
+
+    /**
+     * Discards all resources held by this class, notably the EGL context.  This must be
+     * called from the thread where the context was created.
+     *
+     * On completion, no context will be current.
+     */
+    fun release() {
+        if (mEGLDisplay !== EGL14.EGL_NO_DISPLAY) {
+            // Android is unusual in that it uses a reference-counted EGLDisplay.  So for
+            // every eglInitialize() we need an eglTerminate().
+            EGL14.eglMakeCurrent(
+                mEGLDisplay, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE,
+                EGL14.EGL_NO_CONTEXT
+            )
+            EGL14.eglDestroyContext(mEGLDisplay, mEGLContext)
+            EGL14.eglReleaseThread()
+            EGL14.eglTerminate(mEGLDisplay)
+        }
+
+        mEGLDisplay = EGL14.EGL_NO_DISPLAY
+        mEGLContext = EGL14.EGL_NO_CONTEXT
+        mEGLConfig = null
+    }
+
+    /**
+     * Destroys the specified surface.  Note the EGLSurface won't actually be destroyed if it's
+     * still current in a context.
+     */
+    fun releaseSurface(eglSurface: EGLSurface?) {
+        EGL14.eglDestroySurface(mEGLDisplay, eglSurface)
+    }
+
+    fun createWindowSurface(surface: Surface): EGLSurface = createWindowSurface(surface)
+    fun createWindowSurface(surface: SurfaceTexture): EGLSurface = createWindowSurface(surface)
+
+    /**
+     * Creates an EGL surface associated with a Surface.
+     *
+     * If this is destined for MediaCodec, the EGLConfig should have the "recordable" attribute.
+     */
+    fun createWindowSurface(surface: Any): EGLSurface {
+        if (surface !is Surface && surface !is SurfaceTexture) {
+            throw RuntimeException("invalid surface: $surface")
+        }
+
+        // Create a window surface, and attach it to the Surface we received.
+        val surfaceAttribs = intArrayOf(
+            EGL14.EGL_NONE
+        )
+        val eglSurface: EGLSurface? = EGL14.eglCreateWindowSurface(
+            mEGLDisplay, mEGLConfig, surface,
+            surfaceAttribs, 0
+        )
+        checkEglError("eglCreateWindowSurface")
+        if (eglSurface == null) {
+            throw RuntimeException("surface was null")
+        }
+        return eglSurface
+    }
+
+    /**
+     * Creates an EGL surface associated with an offscreen buffer.
+     */
+    fun createOffscreenSurface(width: Int, height: Int): EGLSurface {
+        val surfaceAttribs = intArrayOf(
+            EGL14.EGL_WIDTH, width,
+            EGL14.EGL_HEIGHT, height,
+            EGL14.EGL_NONE
+        )
+        val eglSurface: EGLSurface? = EGL14.eglCreatePbufferSurface(
+            mEGLDisplay, mEGLConfig,
+            surfaceAttribs, 0
+        )
+        checkEglError("eglCreatePbufferSurface")
+        if (eglSurface == null) {
+            throw RuntimeException("surface was null")
+        }
+        return eglSurface
+    }
+
+    /**
+     * Makes our EGL context current, using the supplied surface for both "draw" and "read".
+     */
+    fun makeCurrent(eglSurface: EGLSurface?) {
+        if (mEGLDisplay === EGL14.EGL_NO_DISPLAY) {
+            // called makeCurrent() before create?
+            log(TAG, "NOTE: makeCurrent w/o display")
+        }
+        if (!EGL14.eglMakeCurrent(mEGLDisplay, eglSurface, eglSurface, mEGLContext)) {
+            throw RuntimeException("eglMakeCurrent failed")
+        }
+    }
+
+    /**
+     * Makes our EGL context current, using the supplied "draw" and "read" surfaces.
+     */
+    fun makeCurrent(drawSurface: EGLSurface?, readSurface: EGLSurface?) {
+        if (mEGLDisplay === EGL14.EGL_NO_DISPLAY) {
+            // called makeCurrent() before create?
+            log(TAG, "NOTE: makeCurrent w/o display")
+        }
+        if (!EGL14.eglMakeCurrent(mEGLDisplay, drawSurface, readSurface, mEGLContext)) {
+            throw RuntimeException("eglMakeCurrent(draw,read) failed")
+        }
+    }
+
+    /**
+     * Makes no context current.
+     */
+    fun makeNothingCurrent() {
+        if (!EGL14.eglMakeCurrent(
+                mEGLDisplay, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE,
+                EGL14.EGL_NO_CONTEXT
+            )
+        ) {
+            throw RuntimeException("eglMakeCurrent failed")
+        }
+    }
+
+    /**
+     * Calls eglSwapBuffers.  Use this to "publish" the current frame.
+     *
+     * @return false on failure
+     */
+    fun swapBuffers(eglSurface: EGLSurface?): Boolean {
+        return EGL14.eglSwapBuffers(mEGLDisplay, eglSurface)
+    }
+
+    /**
+     * Sends the presentation time stamp to EGL.  Time is expressed in nanoseconds.
+     */
+    fun setPresentationTime(eglSurface: EGLSurface?, nsecs: Long) {
+        EGLExt.eglPresentationTimeANDROID(mEGLDisplay, eglSurface, nsecs)
+    }
+
+    /**
+     * Returns true if our context and the specified surface are current.
+     */
+    fun isCurrent(eglSurface: EGLSurface): Boolean {
+        return mEGLContext.equals(EGL14.eglGetCurrentContext()) &&
+                eglSurface.equals(EGL14.eglGetCurrentSurface(EGL14.EGL_DRAW))
+    }
+
+    /**
+     * Performs a simple surface query.
+     */
+    fun querySurface(eglSurface: EGLSurface?, what: Int): Int {
+        val value = IntArray(1)
+        EGL14.eglQuerySurface(mEGLDisplay, eglSurface, what, value, 0)
+        return value[0]
+    }
+
+    /**
+     * Queries a string value.
+     */
+    fun queryString(what: Int): String {
+        return EGL14.eglQueryString(mEGLDisplay, what)
+    }
+
+    /**
+     * Returns the GLES version this context is configured for (currently 2 or 3).
+     */
+    fun getGlVersion(): Int {
+        return mGlVersion
+    }
+
+    /**
+     * Writes the current display, context, and surface to the log.
+     */
+    fun logCurrent(msg: String) {
+        val display: EGLDisplay = EGL14.eglGetCurrentDisplay()
+        val context: EGLContext = EGL14.eglGetCurrentContext()
+        val surface: EGLSurface = EGL14.eglGetCurrentSurface(EGL14.EGL_DRAW)
+        log(
+            TAG, "Current EGL ($msg): display=$display, context=$context, surface=$surface"
+        )
+    }
+
+    /**
+     * Checks for EGL errors.  Throws an exception if an error has been raised.
+     */
+    private fun checkEglError(msg: String) {
+        val error: Int
+        if ((EGL14.eglGetError().also { error = it }) != EGL14.EGL_SUCCESS) {
+            throw RuntimeException(msg + ": EGL error: 0x" + Integer.toHexString(error))
+        }
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/render/EglSurfaceBase.kt

@@ -0,0 +1,178 @@
+package pw.binom.viewmate.glasses.render
+
+import android.graphics.Bitmap
+import android.opengl.EGL14
+import android.opengl.EGLSurface
+import android.opengl.GLES20
+import pw.binom.viewmate.glasses.log
+import java.io.BufferedOutputStream
+import java.io.File
+import java.io.FileOutputStream
+import java.io.IOException
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+
+open class EglSurfaceBase {
+    companion object {
+        const val TAG: String = "GlUtil"
+    }
+
+    // EglCore object we're associated with.  It may be associated with multiple surfaces.
+    protected lateinit var mEglCore: EglCore
+
+    private var mEGLSurface: EGLSurface = EGL14.EGL_NO_SURFACE
+    private var mWidth = -1
+    private var mHeight = -1
+
+    protected constructor(eglCore: EglCore) {
+        mEglCore = eglCore
+    }
+
+    /**
+     * Creates a window surface.
+     *
+     * @param surface May be a Surface or SurfaceTexture.
+     */
+    fun createWindowSurface(surface: Any) {
+        check(mEGLSurface === EGL14.EGL_NO_SURFACE) { "surface already created" }
+        mEGLSurface = mEglCore.createWindowSurface(surface)
+
+        // Don't cache width/height here, because the size of the underlying surface can change
+        // out from under us (see e.g. HardwareScalerActivity).
+        //mWidth = mEglCore.querySurface(mEGLSurface, EGL14.EGL_WIDTH);
+        //mHeight = mEglCore.querySurface(mEGLSurface, EGL14.EGL_HEIGHT);
+    }
+
+    /**
+     * Creates an off-screen surface.
+     */
+    fun createOffscreenSurface(width: Int, height: Int) {
+        check(mEGLSurface === EGL14.EGL_NO_SURFACE) { "surface already created" }
+        mEGLSurface = mEglCore.createOffscreenSurface(width, height)
+        mWidth = width
+        mHeight = height
+    }
+
+    /**
+     * Returns the surface's width, in pixels.
+     *
+     * If this is called on a window surface, and the underlying surface is in the process
+     * of changing size, we may not see the new size right away (e.g. in the "surfaceChanged"
+     * callback).  The size should match after the next buffer swap.
+     */
+    fun getWidth(): Int {
+        return if (mWidth < 0) {
+            mEglCore.querySurface(mEGLSurface, EGL14.EGL_WIDTH)
+        } else {
+            mWidth
+        }
+    }
+
+    /**
+     * Returns the surface's height, in pixels.
+     */
+    fun getHeight(): Int {
+        return if (mHeight < 0) {
+            mEglCore.querySurface(mEGLSurface, EGL14.EGL_HEIGHT)
+        } else {
+            mHeight
+        }
+    }
+
+    /**
+     * Release the EGL surface.
+     */
+    fun releaseEglSurface() {
+        mEglCore.releaseSurface(mEGLSurface)
+        mEGLSurface = EGL14.EGL_NO_SURFACE
+        mHeight = -1
+        mWidth = mHeight
+    }
+
+    /**
+     * Makes our EGL context and surface current.
+     */
+    fun makeCurrent() {
+        mEglCore.makeCurrent(mEGLSurface)
+    }
+
+    /**
+     * Makes our EGL context and surface current for drawing, using the supplied surface
+     * for reading.
+     */
+    fun makeCurrentReadFrom(readSurface: EglSurfaceBase) {
+        mEglCore.makeCurrent(mEGLSurface, readSurface.mEGLSurface)
+    }
+
+    /**
+     * Calls eglSwapBuffers.  Use this to "publish" the current frame.
+     *
+     * @return false on failure
+     */
+    fun swapBuffers(): Boolean {
+        val result: Boolean = mEglCore.swapBuffers(mEGLSurface)
+        if (!result) {
+            log(TAG, "WARNING: swapBuffers() failed")
+        }
+        return result
+    }
+
+    /**
+     * Sends the presentation time stamp to EGL.
+     *
+     * @param nsecs Timestamp, in nanoseconds.
+     */
+    fun setPresentationTime(nsecs: Long) {
+        mEglCore.setPresentationTime(mEGLSurface, nsecs)
+    }
+
+    /**
+     * Saves the EGL surface to a file.
+     *
+     * Expects that this object's EGL surface is current.
+     */
+    @Throws(IOException::class)
+    fun saveFrame(file: File) {
+        if (!mEglCore.isCurrent(mEGLSurface)) {
+            throw RuntimeException("Expected EGL context/surface is not current")
+        }
+
+        // glReadPixels fills in a "direct" ByteBuffer with what is essentially big-endian RGBA
+        // data (i.e. a byte of red, followed by a byte of green...).  While the Bitmap
+        // constructor that takes an int[] wants little-endian ARGB (blue/red swapped), the
+        // Bitmap "copy pixels" method wants the same format GL provides.
+        val filename = file.toString()
+
+        val width = getWidth()
+        val height = getHeight()
+        val buf = ByteBuffer.allocateDirect(width * height * 4)
+        buf.order(ByteOrder.LITTLE_ENDIAN)
+        GLES20.glReadPixels(
+            0, 0, width, height,
+            GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, buf
+        )
+        checkGlError("glReadPixels")
+        buf.rewind()
+
+        var bos: BufferedOutputStream? = null
+        try {
+            bos = BufferedOutputStream(FileOutputStream(filename))
+            val bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
+            bmp.copyPixelsFromBuffer(buf)
+            bmp.compress(Bitmap.CompressFormat.PNG, 90, bos)
+            bmp.recycle()
+        } finally {
+            bos?.close()
+        }
+        log(TAG, "Saved $width" + "x" + "$height frame as '$filename'")
+    }
+
+    private fun checkGlError(op: String) {
+        val error = GLES20.glGetError()
+        if (error != GLES20.GL_NO_ERROR) {
+            val msg = op + ": glError 0x" + Integer.toHexString(error)
+            log(TAG, msg)
+            throw RuntimeException(msg)
+        }
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/render/FullFrameRect.kt

@@ -0,0 +1,70 @@
+package pw.binom.viewmate.glasses.render
+
+/**
+ * @param program The program to use.  FullFrameRect takes ownership, and will release
+ * the program when no longer needed.
+ */
+class FullFrameRect(program: Texture2dProgram) {
+    private val mRectDrawable = Drawable2d(Drawable2d.Prefab.FULL_RECTANGLE)
+    private var mProgram: Texture2dProgram? = program
+
+    /**
+     * Releases resources.
+     *
+     * This must be called with the appropriate EGL context current (i.e. the one that was
+     * current when the constructor was called).  If we're about to destroy the EGL context,
+     * there's no value in having the caller make it current just to do this cleanup, so you
+     * can pass a flag that will tell this function to skip any EGL-context-specific cleanup.
+     */
+    fun release(doEglCleanup: Boolean) {
+        if (doEglCleanup) {
+            mProgram?.release()
+        }
+        mProgram = null
+    }
+
+    /**
+     * Returns the program currently in use.
+     */
+    fun getProgram(): Texture2dProgram? = mProgram
+
+    /**
+     * Changes the program.  The previous program will be released.
+     *
+     * The appropriate EGL context must be current.
+     */
+    fun changeProgram(program: Texture2dProgram?) {
+        mProgram?.release()
+        mProgram = program
+    }
+
+    /**
+     * Creates a texture object suitable for use with drawFrame().
+     */
+    fun createTextureObject(): Int {
+        val mProgram = mProgram
+        checkNotNull(mProgram) { "FrameRect already closed" }
+        return mProgram.createTextureObject()
+    }
+
+    /**
+     * Draws a viewport-filling rect, texturing it with the specified texture object.
+     */
+    fun drawFrame(textureId: Int, texMatrix: FloatArray) {
+        val mProgram = mProgram
+        checkNotNull(mProgram) { "FrameRect already closed" }
+        // Use the identity matrix for MVP so our 2x2 FULL_RECTANGLE covers the viewport.
+        mProgram.draw(
+            mvpMatrix = GlUtil.IDENTITY_MATRIX,
+            vertexBuffer = mRectDrawable.mVertexArray,
+            firstVertex = 0,
+            vertexCount = mRectDrawable.mVertexCount,
+            coordsPerVertex = mRectDrawable.mCoordsPerVertex,
+            vertexStride = mRectDrawable.mVertexStride,
+            texMatrix = texMatrix,
+            texBuffer = mRectDrawable.mTexCoordArray,
+            textureId = textureId,
+            texStride = mRectDrawable.mTexCoordStride,
+        )
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/render/GlUtil.kt

@@ -0,0 +1,177 @@
+package pw.binom.viewmate.glasses.render
+
+import android.opengl.GLES20
+import android.opengl.GLES30
+import android.opengl.Matrix
+import pw.binom.viewmate.glasses.log
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+import java.nio.FloatBuffer
+
+object GlUtil {
+    const val TAG: String = "Grafika"
+
+    /** Identity matrix for general use.  Don't modify or life will get weird.  */
+    val IDENTITY_MATRIX = FloatArray(16).also {
+        Matrix.setIdentityM(it, 0)
+    }
+
+    private const val SIZEOF_FLOAT: Int = 4
+
+    /**
+     * Creates a new program from the supplied vertex and fragment shaders.
+     *
+     * @return A handle to the program, or 0 on failure.
+     */
+    fun createProgram(vertexSource: String?, fragmentSource: String?): Int {
+        val vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource)
+        if (vertexShader == 0) {
+            error("Can't create Vertex Shader")
+            return 0
+        }
+        val pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource)
+        if (pixelShader == 0) {
+            error("Can't create Pixel Shader")
+            return 0
+        }
+
+        var program = GLES20.glCreateProgram()
+        checkGlError("glCreateProgram")
+        if (program == 0) {
+            log(TAG, "Could not create program")
+        }
+        GLES20.glAttachShader(program, vertexShader)
+        checkGlError("glAttachShader")
+        GLES20.glAttachShader(program, pixelShader)
+        checkGlError("glAttachShader")
+        GLES20.glLinkProgram(program)
+        val linkStatus = IntArray(1)
+        GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0)
+        if (linkStatus[0] != GLES20.GL_TRUE) {
+            log(TAG, "Could not link program: ")
+            log(TAG, GLES20.glGetProgramInfoLog(program))
+            GLES20.glDeleteProgram(program)
+            program = 0
+        }
+        return program
+    }
+
+    /**
+     * Compiles the provided shader source.
+     *
+     * @return A handle to the shader, or 0 on failure.
+     */
+    fun loadShader(shaderType: Int, source: String?): Int {
+        var shader = GLES20.glCreateShader(shaderType)
+        checkGlError("glCreateShader type=$shaderType")
+        GLES20.glShaderSource(shader, source)
+        GLES20.glCompileShader(shader)
+        val compiled = IntArray(1)
+        GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0)
+        if (compiled[0] == 0) {
+            log(TAG, "Could not compile shader $shaderType:")
+            log(TAG, " " + GLES20.glGetShaderInfoLog(shader))
+            GLES20.glDeleteShader(shader)
+            shader = 0
+        }
+        return shader
+    }
+
+    /**
+     * Checks to see if a GLES error has been raised.
+     */
+    fun checkGlError(op: String) {
+        val error = GLES20.glGetError()
+        if (error != GLES20.GL_NO_ERROR) {
+            val msg = op + ": glError 0x" + Integer.toHexString(error)
+            log(TAG, msg)
+            throw RuntimeException(msg)
+        }
+    }
+
+    /**
+     * Checks to see if the location we obtained is valid.  GLES returns -1 if a label
+     * could not be found, but does not set the GL error.
+     *
+     * Throws a RuntimeException if the location is invalid.
+     */
+    fun checkLocation(location: Int, label: String) {
+        if (location < 0) {
+            throw RuntimeException("Unable to locate '$label' in program")
+        }
+    }
+
+    /**
+     * Creates a texture from raw data.
+     *
+     * @param data Image data, in a "direct" ByteBuffer.
+     * @param width Texture width, in pixels (not bytes).
+     * @param height Texture height, in pixels.
+     * @param format Image data format (use constant appropriate for glTexImage2D(), e.g. GL_RGBA).
+     * @return Handle to texture.
+     */
+    fun createImageTexture(data: ByteBuffer?, width: Int, height: Int, format: Int): Int {
+        val textureHandles = IntArray(1)
+
+        GLES20.glGenTextures(1, textureHandles, 0)
+        val textureHandle = textureHandles[0]
+        GlUtil.checkGlError("glGenTextures")
+
+        // Bind the texture handle to the 2D texture target.
+        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle)
+
+        // Configure min/mag filtering, i.e. what scaling method do we use if what we're rendering
+        // is smaller or larger than the source image.
+        GLES20.glTexParameteri(
+            GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER,
+            GLES20.GL_LINEAR
+        )
+        GLES20.glTexParameteri(
+            GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER,
+            GLES20.GL_LINEAR
+        )
+        GlUtil.checkGlError("loadImageTexture")
+
+        // Load the data from the buffer into the texture handle.
+        GLES20.glTexImage2D(
+            GLES20.GL_TEXTURE_2D,  /*level*/0, format,
+            width, height,  /*border*/0, format, GLES20.GL_UNSIGNED_BYTE, data
+        )
+        GlUtil.checkGlError("loadImageTexture")
+
+        return textureHandle
+    }
+
+    /**
+     * Allocates a direct float buffer, and populates it with the float array data.
+     */
+    fun createFloatBuffer(coords: FloatArray): FloatBuffer {
+        // Allocate a direct ByteBuffer, using 4 bytes per float, and copy coords into it.
+        val bb = ByteBuffer.allocateDirect(coords.size * SIZEOF_FLOAT)
+        bb.order(ByteOrder.nativeOrder())
+        val fb = bb.asFloatBuffer()
+        fb.put(coords)
+        fb.position(0)
+        return fb
+    }
+
+    /**
+     * Writes GL version info to the log.
+     */
+    fun logVersionInfo() {
+        log(TAG, "vendor  : " + GLES20.glGetString(GLES20.GL_VENDOR))
+        log(TAG, "renderer: " + GLES20.glGetString(GLES20.GL_RENDERER))
+        log(TAG, "version : " + GLES20.glGetString(GLES20.GL_VERSION))
+
+        if (false) {
+            val values = IntArray(1)
+            GLES30.glGetIntegerv(GLES30.GL_MAJOR_VERSION, values, 0)
+            val majorVersion = values[0]
+            GLES30.glGetIntegerv(GLES30.GL_MINOR_VERSION, values, 0)
+            val minorVersion = values[0]
+            if (GLES30.glGetError() == GLES30.GL_NO_ERROR) {
+                log(TAG, "iversion: $majorVersion.$minorVersion")
+            }
+        }
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/render/Texture2dProgram.kt

@@ -0,0 +1,311 @@
+package pw.binom.viewmate.glasses.render
+
+import android.opengl.GLES11Ext
+import android.opengl.GLES20
+import pw.binom.viewmate.glasses.log
+import pw.binom.viewmate.glasses.render.GlUtil.checkGlError
+import pw.binom.viewmate.glasses.render.GlUtil.checkLocation
+import pw.binom.viewmate.glasses.render.GlUtil.createProgram
+import java.nio.FloatBuffer
+
+class Texture2dProgram(private val mProgramType: ProgramType) {
+    companion object {
+        private const val TAG: String = GlUtil.TAG
+
+        // Simple vertex shader, used for all programs.
+        private const val VERTEX_SHADER = "uniform mat4 uMVPMatrix;\n" +
+                "uniform mat4 uTexMatrix;\n" +
+                "attribute vec4 aPosition;\n" +
+                "attribute vec4 aTextureCoord;\n" +
+                "varying vec2 vTextureCoord;\n" +
+                "void main() {\n" +
+                "    gl_Position = uMVPMatrix * aPosition;\n" +
+                "    vTextureCoord = (uTexMatrix * aTextureCoord).xy;\n" +
+                "}\n"
+
+        // Simple fragment shader for use with "normal" 2D textures.
+        private const val FRAGMENT_SHADER_2D = "precision mediump float;\n" +
+                "varying vec2 vTextureCoord;\n" +
+                "uniform sampler2D sTexture;\n" +
+                "void main() {\n" +
+                "    gl_FragColor = texture2D(sTexture, vTextureCoord);\n" +
+                "}\n"
+
+        // Simple fragment shader for use with external 2D textures (e.g. what we get from
+        // SurfaceTexture).
+        private const val FRAGMENT_SHADER_EXT = "#extension GL_OES_EGL_image_external : require\n" +
+                "precision mediump float;\n" +
+                "varying vec2 vTextureCoord;\n" +
+                "uniform samplerExternalOES sTexture;\n" +
+                "void main() {\n" +
+                "    gl_FragColor = texture2D(sTexture, vTextureCoord);\n" +
+                "}\n"
+
+        // Fragment shader that converts color to black & white with a simple transformation.
+        private val FRAGMENT_SHADER_EXT_BW = "#extension GL_OES_EGL_image_external : require\n" +
+                "precision mediump float;\n" +
+                "varying vec2 vTextureCoord;\n" +
+                "uniform samplerExternalOES sTexture;\n" +
+                "void main() {\n" +
+                "    vec4 tc = texture2D(sTexture, vTextureCoord);\n" +
+                "    float color = tc.r * 0.3 + tc.g * 0.59 + tc.b * 0.11;\n" +
+                "    gl_FragColor = vec4(color, color, color, 1.0);\n" +
+                "}\n"
+
+        // Fragment shader with a convolution filter.  The upper-left half will be drawn normally,
+        // the lower-right half will have the filter applied, and a thin red line will be drawn
+        // at the border.
+        const val KERNEL_SIZE = 9
+        private val FRAGMENT_SHADER_EXT_FILT = "#extension GL_OES_EGL_image_external : require\n" +
+                "#define KERNEL_SIZE " + KERNEL_SIZE + "\n" +
+                "precision highp float;\n" +
+                "varying vec2 vTextureCoord;\n" +
+                "uniform samplerExternalOES sTexture;\n" +
+                "uniform float uKernel[KERNEL_SIZE];\n" +
+                "uniform vec2 uTexOffset[KERNEL_SIZE];\n" +
+                "uniform float uColorAdjust;\n" +
+                "void main() {\n" +
+                "    int i = 0;\n" +
+                "    vec4 sum = vec4(0.0);\n" +
+                "    if (vTextureCoord.x < vTextureCoord.y - 0.005) {\n" +
+                "        for (i = 0; i < KERNEL_SIZE; i++) {\n" +
+                "            vec4 texc = texture2D(sTexture, vTextureCoord + uTexOffset[i]);\n" +
+                "            sum += texc * uKernel[i];\n" +
+                "        }\n" +
+                "    sum += uColorAdjust;\n" +
+                "    } else if (vTextureCoord.x > vTextureCoord.y + 0.005) {\n" +
+                "        sum = texture2D(sTexture, vTextureCoord);\n" +
+                "    } else {\n" +
+                "        sum.r = 1.0;\n" +
+                "    }\n" +
+                "    gl_FragColor = sum;\n" +
+                "}\n"
+    }
+
+    enum class ProgramType {
+        TEXTURE_2D, TEXTURE_EXT, TEXTURE_EXT_BW, TEXTURE_EXT_FILT
+    }
+
+    // Handles to the GL program and various components of it.
+    private var mProgramHandle = 0
+    private val muMVPMatrixLoc: Int
+    private val muTexMatrixLoc: Int
+    private var muKernelLoc = 0
+    private val muTexOffsetLoc: Int
+    private val muColorAdjustLoc: Int
+    private val maPositionLoc: Int
+    private val maTextureCoordLoc: Int
+
+    private val mTextureTarget: Int
+
+    private val mKernel = FloatArray(KERNEL_SIZE)
+    private var mTexOffset: FloatArray? = null
+    private var mColorAdjust = 0f
+
+    /**
+     * Prepares the program in the current EGL context.
+     */
+    init {
+        when (mProgramType) {
+            ProgramType.TEXTURE_2D -> {
+                mTextureTarget = GLES20.GL_TEXTURE_2D
+                mProgramHandle = createProgram(VERTEX_SHADER, FRAGMENT_SHADER_2D)
+            }
+
+            ProgramType.TEXTURE_EXT -> {
+                mTextureTarget = GLES11Ext.GL_TEXTURE_EXTERNAL_OES
+                mProgramHandle = createProgram(VERTEX_SHADER, FRAGMENT_SHADER_EXT)
+            }
+
+            ProgramType.TEXTURE_EXT_BW -> {
+                mTextureTarget = GLES11Ext.GL_TEXTURE_EXTERNAL_OES
+                mProgramHandle = createProgram(VERTEX_SHADER, FRAGMENT_SHADER_EXT_BW)
+            }
+
+            ProgramType.TEXTURE_EXT_FILT -> {
+                mTextureTarget = GLES11Ext.GL_TEXTURE_EXTERNAL_OES
+                mProgramHandle = createProgram(VERTEX_SHADER, FRAGMENT_SHADER_EXT_FILT)
+            }
+
+            else -> throw RuntimeException("Unhandled type " + mProgramType)
+        }
+        if (mProgramHandle == 0) {
+            throw RuntimeException("Unable to create program")
+        }
+        log(TAG, "Created program $mProgramHandle ($mProgramType)")
+
+        // get locations of attributes and uniforms
+        maPositionLoc = GLES20.glGetAttribLocation(mProgramHandle, "aPosition")
+        checkLocation(maPositionLoc, "aPosition")
+        maTextureCoordLoc = GLES20.glGetAttribLocation(mProgramHandle, "aTextureCoord")
+        checkLocation(maTextureCoordLoc, "aTextureCoord")
+        muMVPMatrixLoc = GLES20.glGetUniformLocation(mProgramHandle, "uMVPMatrix")
+        checkLocation(muMVPMatrixLoc, "uMVPMatrix")
+        muTexMatrixLoc = GLES20.glGetUniformLocation(mProgramHandle, "uTexMatrix")
+        checkLocation(muTexMatrixLoc, "uTexMatrix")
+        muKernelLoc = GLES20.glGetUniformLocation(mProgramHandle, "uKernel")
+        if (muKernelLoc < 0) {
+            // no kernel in this one
+            muKernelLoc = -1
+            muTexOffsetLoc = -1
+            muColorAdjustLoc = -1
+        } else {
+            // has kernel, must also have tex offset and color adj
+            muTexOffsetLoc = GLES20.glGetUniformLocation(mProgramHandle, "uTexOffset")
+            checkLocation(muTexOffsetLoc, "uTexOffset")
+            muColorAdjustLoc = GLES20.glGetUniformLocation(mProgramHandle, "uColorAdjust")
+            checkLocation(muColorAdjustLoc, "uColorAdjust")
+
+            // initialize default values
+            setKernel(floatArrayOf(0f, 0f, 0f, 0f, 1f, 0f, 0f, 0f, 0f), 0f)
+            setTexSize(256, 256)
+        }
+    }
+
+    /**
+     * Releases the program.
+     *
+     * The appropriate EGL context must be current (i.e. the one that was used to create
+     * the program).
+     */
+    fun release() {
+        log(TAG, "deleting program $mProgramHandle")
+        GLES20.glDeleteProgram(mProgramHandle)
+        mProgramHandle = -1
+    }
+
+    /**
+     * Returns the program type.
+     */
+    fun getProgramType() = mProgramType
+
+    /**
+     * Creates a texture object suitable for use with this program.
+     *
+     * On exit, the texture will be bound.
+     */
+    fun createTextureObject(): Int {
+        val textures = IntArray(1)
+        GLES20.glGenTextures(1, textures, 0)
+        checkGlError("glGenTextures")
+
+        val texId = textures[0]
+        GLES20.glBindTexture(mTextureTarget, texId)
+        checkGlError("glBindTexture $texId")
+
+        GLES20.glTexParameterf(
+            GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER,
+            GLES20.GL_NEAREST.toFloat()
+        )
+        GLES20.glTexParameterf(
+            GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER,
+            GLES20.GL_LINEAR.toFloat()
+        )
+        GLES20.glTexParameteri(
+            GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S,
+            GLES20.GL_CLAMP_TO_EDGE
+        )
+        GLES20.glTexParameteri(
+            GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T,
+            GLES20.GL_CLAMP_TO_EDGE
+        )
+        checkGlError("glTexParameter")
+
+        return texId
+    }
+
+    /**
+     * Configures the convolution filter values.
+     *
+     * @param values Normalized filter values; must be KERNEL_SIZE elements.
+     */
+    fun setKernel(values: FloatArray, colorAdj: Float) {
+        require(values.size == KERNEL_SIZE) {
+            "Kernel size is " + values.size +
+                    " vs. " + KERNEL_SIZE
+        }
+        System.arraycopy(values, 0, mKernel, 0, KERNEL_SIZE)
+        mColorAdjust = colorAdj
+    }
+
+    /**
+     * Sets the size of the texture.  This is used to find adjacent texels when filtering.
+     */
+    fun setTexSize(width: Int, height: Int) {
+        val rw = 1.0f / width
+        val rh = 1.0f / height
+
+        // Don't need to create a new array here, but it's syntactically convenient.
+        mTexOffset = floatArrayOf(
+            -rw, -rh, 0f, -rh, rw, -rh,
+            -rw, 0f, 0f, 0f, rw, 0f,
+            -rw, rh, 0f, rh, rw, rh
+        )
+    }
+
+    /**
+     * Issues the draw call.  Does the full setup on every call.
+     */
+    fun draw(
+        mvpMatrix: FloatArray?, vertexBuffer: FloatBuffer, firstVertex: Int,
+        vertexCount: Int, coordsPerVertex: Int, vertexStride: Int,
+        texMatrix: FloatArray?, texBuffer: FloatBuffer, textureId: Int, texStride: Int
+    ) {
+        checkGlError("draw start")
+
+        // Select the program.
+        GLES20.glUseProgram(mProgramHandle)
+        checkGlError("glUseProgram")
+
+        // Set the texture.
+        GLES20.glActiveTexture(GLES20.GL_TEXTURE0)
+        GLES20.glBindTexture(mTextureTarget, textureId)
+
+        // Copy the model / view / projection matrix over.
+        GLES20.glUniformMatrix4fv(muMVPMatrixLoc, 1, false, mvpMatrix, 0)
+        checkGlError("glUniformMatrix4fv")
+
+        // Copy the texture transformation matrix over.
+        GLES20.glUniformMatrix4fv(muTexMatrixLoc, 1, false, texMatrix, 0)
+        checkGlError("glUniformMatrix4fv")
+
+        // Enable the "aPosition" vertex attribute.
+        GLES20.glEnableVertexAttribArray(maPositionLoc)
+        checkGlError("glEnableVertexAttribArray")
+
+        // Connect vertexBuffer to "aPosition".
+        GLES20.glVertexAttribPointer(
+            maPositionLoc, coordsPerVertex,
+            GLES20.GL_FLOAT, false, vertexStride, vertexBuffer
+        )
+        checkGlError("glVertexAttribPointer")
+
+        // Enable the "aTextureCoord" vertex attribute.
+        GLES20.glEnableVertexAttribArray(maTextureCoordLoc)
+        checkGlError("glEnableVertexAttribArray")
+
+        // Connect texBuffer to "aTextureCoord".
+        GLES20.glVertexAttribPointer(
+            maTextureCoordLoc, 2,
+            GLES20.GL_FLOAT, false, texStride, texBuffer
+        )
+        checkGlError("glVertexAttribPointer")
+
+        // Populate the convolution kernel, if present.
+        if (muKernelLoc >= 0) {
+            GLES20.glUniform1fv(muKernelLoc, KERNEL_SIZE, mKernel, 0)
+            GLES20.glUniform2fv(muTexOffsetLoc, KERNEL_SIZE, mTexOffset, 0)
+            GLES20.glUniform1f(muColorAdjustLoc, mColorAdjust)
+        }
+
+        // Draw the rect.
+        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, firstVertex, vertexCount)
+        checkGlError("glDrawArrays")
+
+        // Done -- disable vertex array, texture, and program.
+        GLES20.glDisableVertexAttribArray(maPositionLoc)
+        GLES20.glDisableVertexAttribArray(maTextureCoordLoc)
+        GLES20.glBindTexture(mTextureTarget, 0)
+        GLES20.glUseProgram(0)
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/render/WindowSurface.kt

@@ -0,0 +1,67 @@
+package pw.binom.viewmate.glasses.render
+
+import android.graphics.SurfaceTexture
+import android.view.Surface
+
+class WindowSurface : EglSurfaceBase {
+    private var mSurface: Surface? = null
+    private var mReleaseSurface = false
+
+    /**
+     * Associates an EGL surface with the native window surface.
+     *
+     * Set releaseSurface to true if you want the Surface to be released when release() is
+     * called.  This is convenient, but can interfere with framework classes that expect to
+     * manage the Surface themselves (e.g. if you release a SurfaceView's Surface, the
+     * surfaceDestroyed() callback won't fire).
+     */
+    constructor(eglCore: EglCore, surface: Surface, releaseSurface: Boolean) : super(eglCore) {
+        createWindowSurface(surface)
+        mSurface = surface
+        mReleaseSurface = releaseSurface
+    }
+
+    /**
+     * Associates an EGL surface with the SurfaceTexture.
+     */
+    constructor(eglCore: EglCore, surfaceTexture: SurfaceTexture) : super(eglCore) {
+        createWindowSurface(surfaceTexture)
+    }
+
+    /**
+     * Releases any resources associated with the EGL surface (and, if configured to do so,
+     * with the Surface as well).
+     *
+     * Does not require that the surface's EGL context be current.
+     */
+    fun release() {
+        releaseEglSurface()
+        val mSurface = mSurface
+        if (mSurface != null) {
+            if (mReleaseSurface) {
+                mSurface.release()
+            }
+            this.mSurface = null
+        }
+    }
+
+    /**
+     * Recreate the EGLSurface, using the new EglBase.  The caller should have already
+     * freed the old EGLSurface with releaseEglSurface().
+     *
+     * This is useful when we want to update the EGLSurface associated with a Surface.
+     * For example, if we want to share with a different EGLContext, which can only
+     * be done by tearing down and recreating the context.  (That's handled by the caller;
+     * this just creates a new EGLSurface for the Surface we were handed earlier.)
+     *
+     * If the previous EGLSurface isn't fully destroyed, e.g. it's still current on a
+     * context somewhere, the create call will fail with complaints from the Surface
+     * about already being connected.
+     */
+    fun recreate(newEglCore: EglCore) {
+        val mSurface = mSurface
+        checkNotNull(mSurface) { "not yet implemented for SurfaceTexture" }
+        mEglCore = newEglCore // switch to new context
+        createWindowSurface(mSurface) // create new surface
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/ui/BinocularVideoPlayer.kt

@@ -0,0 +1,181 @@
+package pw.binom.viewmate.glasses.ui
+
+import android.graphics.SurfaceTexture
+import android.opengl.GLES20
+import android.view.Surface
+import android.view.SurfaceHolder
+import android.view.SurfaceView
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.viewinterop.AndroidView
+import com.google.android.exoplayer2.SimpleExoPlayer
+import pw.binom.viewmate.glasses.log
+import pw.binom.viewmate.glasses.render.EglCore
+import pw.binom.viewmate.glasses.render.FullFrameRect
+import pw.binom.viewmate.glasses.render.Texture2dProgram
+import pw.binom.viewmate.glasses.render.WindowSurface
+
+/**
+ * Бинокулярный видеорендер: один [SimpleExoPlayer] → SurfaceTexture → EGL-блит
+ * в несколько выводов. Внутри [Binocular] content вызывается ДВАЖДЫ (левый/правый
+ * глаз), поэтому [EglVideoRenderer] создаётся ОДИН на экран и шарится между
+ * двумя экземплярами [BinocularVideoPlayer] — иначе второй setVideoSurface
+ * перезаписал бы первый.
+ */
+@Composable
+fun BinocularVideoPlayer(
+    player: SimpleExoPlayer,
+    renderer: EglVideoRenderer,
+    modifier: Modifier = Modifier,
+) {
+    Box(modifier = modifier) {
+        // Два SurfaceView на экземпляр (левый/правый глаз). Все они
+        // регистрируются в общем рендерере и получают один и тот же кадр.
+        AndroidView(
+            modifier = Modifier.fillMaxSize(),
+            factory = { context ->
+                SurfaceView(context).also { sv ->
+                    sv.holder.addCallback(renderer.createCallback())
+                }
+            }
+        )
+        AndroidView(
+            modifier = Modifier.fillMaxSize(),
+            factory = { context ->
+                SurfaceView(context).also { sv ->
+                    sv.holder.addCallback(renderer.createCallback())
+                }
+            }
+        )
+    }
+}
+
+/**
+ * Общее GL-состояние: один EglCore + FullFrameRect + SurfaceTexture для плеера,
+ * кадр дублируется во все готовые выводы (окна поверхностей).
+ *
+ * Всё создаётся на главном потоке (SurfaceHolder.Callback и OnFrameAvailableListener),
+ * поэтому защита от гонок — null-проверки: кадр может прийти между созданиями выводов.
+ */
+class EglVideoRenderer(private val player: SimpleExoPlayer) {
+
+    private var eglCore: EglCore? = null
+    private var fullFrameBlit: FullFrameRect? = null
+    private var textureId = 0
+    private var videoSurfaceTexture: SurfaceTexture? = null
+    private val transformMatrix = FloatArray(16)
+    private var playerSurface: Surface? = null
+
+    private val outputs = mutableListOf<Output>()
+
+    private class Output(
+        val holder: SurfaceHolder,
+        val surface: WindowSurface,
+    ) {
+        var width = 0
+        var height = 0
+    }
+
+    private var released = false
+
+    private val frameAvailableListener = SurfaceTexture.OnFrameAvailableListener { _ ->
+        if (released) return@OnFrameAvailableListener
+        val st = videoSurfaceTexture
+        val blit = fullFrameBlit
+        if (st == null || blit == null) return@OnFrameAvailableListener
+
+        st.updateTexImage()
+        st.getTransformMatrix(transformMatrix)
+
+        outputs.forEach { output ->
+            if (output.width > 0 && output.height > 0) {
+                drawFrame(blit, output.surface, output.width, output.height)
+            }
+        }
+    }
+
+    /** Колбэк для очередного SurfaceView (каждая половина экрана регистрирует свой вывод). */
+    fun createCallback(): SurfaceHolder.Callback = object : SurfaceHolder.Callback {
+        override fun surfaceCreated(holder: SurfaceHolder) = attach(holder)
+
+        override fun surfaceChanged(
+            holder: SurfaceHolder, format: Int, width: Int, height: Int
+        ) {
+            outputs.firstOrNull { it.holder === holder }?.let {
+                it.width = width
+                it.height = height
+            }
+        }
+
+        override fun surfaceDestroyed(holder: SurfaceHolder) {
+            val index = outputs.indexOfFirst { it.holder === holder }
+            if (index >= 0) {
+                val output = outputs.removeAt(index)
+                output.surface.release()
+                log("glasses", "EglVideoRenderer: вывод удалён")
+            }
+        }
+    }
+
+    private fun attach(holder: SurfaceHolder) {
+        if (released) return
+        val egl = eglCore ?: EglCore().also { eglCore = it }
+        val ws = WindowSurface(egl, holder.surface, false)
+        outputs.add(Output(holder, ws))
+
+        if (fullFrameBlit == null) {
+            // Первый вывод: создаём общий GL-стэйт, текущий контекст — его.
+            ws.makeCurrent()
+            fullFrameBlit = FullFrameRect(Texture2dProgram(Texture2dProgram.ProgramType.TEXTURE_EXT))
+            textureId = fullFrameBlit!!.createTextureObject()
+            videoSurfaceTexture = SurfaceTexture(textureId).also {
+                it.setOnFrameAvailableListener(frameAvailableListener)
+            }
+            playerSurface = Surface(videoSurfaceTexture).also {
+                player.setVideoSurface(it)
+            }
+            log("glasses", "EglVideoRenderer: GL-стэйт создан, плеер привязан к SurfaceTexture")
+        }
+    }
+
+    private fun drawFrame(blit: FullFrameRect, windowSurface: WindowSurface, viewWidth: Int, viewHeight: Int) {
+        windowSurface.makeCurrent()
+        GLES20.glViewport(0, 0, viewWidth, viewHeight)
+        blit.drawFrame(textureId, transformMatrix)
+        windowSurface.swapBuffers()
+    }
+
+    fun release() {
+        if (released) return
+        released = true
+        log("glasses", "EglVideoRenderer: release")
+
+        // Отвязать плеер (плеер мог быть уже освобождён — не падаем).
+        val ps = playerSurface
+        if (ps != null) {
+            try {
+                player.setVideoSurface(null)
+            } catch (e: Throwable) {
+                log("glasses", "setVideoSurface(null) пропущен: ${e.message}")
+            }
+            ps.release()
+            playerSurface = null
+        }
+
+        videoSurfaceTexture?.release()
+        videoSurfaceTexture = null
+
+        outputs.forEach { it.surface.release() }
+        outputs.clear()
+
+        fullFrameBlit?.release(false)
+        fullFrameBlit = null
+
+        eglCore?.release()
+        eglCore = null
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/ui/GlassesMovieScreen.kt

@@ -0,0 +1,124 @@
+package pw.binom.viewmate.glasses.ui
+
+import android.app.Activity
+import android.view.WindowManager
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import com.google.android.exoplayer2.Player
+import com.google.android.exoplayer2.SimpleExoPlayer
+import com.google.android.exoplayer2.video.VideoSize
+import pw.binom.viewmate.glasses.log
+
+/**
+ * Экран кино: один плеер, вывод — дважды (левый/правый глаз) через [Binocular].
+ * «Дубль» на эмуляторе 1280×480 — ожидаемое поведение.
+ */
+@Composable
+fun GlassesMovieScreen(
+    player: SimpleExoPlayer,
+    title: String?,
+) {
+    log("glasses", "GlassesMovieScreen: ${title ?: "без названия"}")
+
+    val context = LocalContext.current
+    val window = (context as Activity).window
+    DisposableEffect(window) {
+        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+        onDispose {
+            window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+        }
+    }
+
+    var videoWidth by remember { mutableIntStateOf(640) }
+    var videoHeight by remember { mutableIntStateOf(480) }
+
+    // Один рендерер на экран: оба экземпляра BinocularVideoPlayer (левый/правый
+    // глаз из Binocular) регистрируют в нём свои SurfaceView.
+    val renderer = remember { EglVideoRenderer(player) }
+
+    DisposableEffect(player) {
+        val listener = object : Player.Listener {
+            override fun onVideoSizeChanged(videoSize: VideoSize) {
+                if (videoSize.width > 0 && videoSize.height > 0) {
+                    log("glasses", "videoSize: ${videoSize.width}x${videoSize.height}")
+                    videoWidth = videoSize.width
+                    videoHeight = videoSize.height
+                }
+            }
+        }
+        player.addListener(listener)
+        onDispose {
+            player.removeListener(listener)
+            renderer.release()
+        }
+    }
+
+    Binocular(scale = true) {
+        val screenWidthPx = BinocularScreenSize.current.width
+        val screenHeightPx = BinocularScreenSize.current.height
+
+        val (playerWidth, playerHeight) = calculateVideoSizeFull(
+            videoWidth = videoWidth,
+            videoHeight = videoHeight,
+            maxWidth = screenWidthPx, // padding = 0
+            maxHeight = screenHeightPx - 25,
+        )
+
+        // «Нос к носу»: окно каждого глаза прижато к центру экрана.
+        val horizontalArrangement = when (BinocularScreenSide.current) {
+            Side.LEFT -> Arrangement.End
+            Side.RIGHT -> Arrangement.Start
+        }
+
+        Row(
+            modifier = Modifier
+                .background(Color.Black)
+                .width((screenWidthPx).px),
+            horizontalArrangement = horizontalArrangement,
+        ) {
+            BinocularVideoPlayer(
+                player = player,
+                renderer = renderer,
+                modifier = Modifier.size(playerWidth.px, playerHeight.px),
+            )
+        }
+    }
+}
+
+/** Fit с сохранением пропорций: вариант по ширине/по высоте, берём помещающийся. */
+fun calculateVideoSizeFull(
+    videoWidth: Int, videoHeight: Int,
+    maxWidth: Int, maxHeight: Int,
+    paddingStart: Int = 0, paddingEnd: Int = 0,
+    paddingTop: Int = 0, paddingBottom: Int = 0
+): Pair<Int, Int> {
+    val availableWidth = maxWidth - (paddingStart + paddingEnd)
+    val availableHeight = maxHeight - (paddingTop + paddingBottom)
+    val aspectRatio = videoWidth.toFloat() / videoHeight.toFloat()
+
+    // Вариант: ширина по максимальной ширине
+    val widthByWidth = availableWidth
+    val heightByWidth = (widthByWidth / aspectRatio).toInt()
+    // Вариант: высота по максимальной высоте
+    val heightByHeight = availableHeight
+    val widthByHeight = (heightByHeight * aspectRatio).toInt()
+
+    // Выбираем вариант, который помещается целиком
+    return if (heightByWidth <= availableHeight) {
+        Pair(widthByWidth, heightByWidth)
+    } else {
+        Pair(widthByHeight, heightByHeight)
+    }
+}

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/ui/Utils.kt

@@ -0,0 +1,10 @@
+package pw.binom.viewmate.glasses.ui
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.unit.Dp
+
+/** Перевод пикселей (например, из расчёта размера видео) в Dp текущей плотности. */
+@get:Composable
+val Int.px: Dp
+    get() = with(LocalDensity.current) { this@px.toDp() }

app-glasses/src/main/kotlin/pw/binom/viewmate/glasses/ui/ViewUtils.kt

@@ -0,0 +1,161 @@
+package pw.binom.viewmate.glasses.ui
+
+import android.app.Activity
+import androidx.compose.foundation.focusable
+import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.ProvidableCompositionLocal
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.staticCompositionLocalOf
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.TransformOrigin
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.layout.Layout
+import androidx.compose.ui.platform.LocalContext
+import kotlin.reflect.KProperty
+
+enum class Side {
+    LEFT, RIGHT,
+}
+
+val BinocularScreenSide = staticCompositionLocalOf<Side> {
+    error("Rayneo Layout not active")
+}
+
+@Composable
+fun <T> ProvidableCompositionLocal<T>.getValue(thisRef: Any?, property: KProperty<*>): T = current
+
+data class ScreenSize(
+    val width: Int,
+    val height: Int,
+)
+
+val BinocularScreenSize = staticCompositionLocalOf<ScreenSize> {
+    error("Rayneo Layout not active")
+}
+
+@Composable
+fun BinocularSize(scale: Boolean, func: @Composable () -> Unit) {
+    val context = LocalContext.current
+    val screenWidthPx =
+        remember { (context as Activity).windowManager.currentWindowMetrics.bounds.width() }
+    val screenHeightPx =
+        remember { (context as Activity).windowManager.currentWindowMetrics.bounds.height() }
+    if (scale) {
+        CompositionLocalProvider(
+            BinocularScreenSize provides ScreenSize(
+                width = screenWidthPx,
+                height = screenHeightPx,
+            )
+        ) {
+            func()
+        }
+    } else {
+        CompositionLocalProvider(
+            BinocularScreenSize provides ScreenSize(
+                width = screenWidthPx / 2,
+                height = screenHeightPx,
+            )
+        ) {
+            func()
+        }
+    }
+}
+
+@Composable
+@Suppress("UnusedBoxWithConstraintsScope")
+fun Binocular(
+    modifier: Modifier = Modifier,
+    eachModifier: Modifier = Modifier,
+    leftModifier: Modifier = Modifier,
+    rightModifier: Modifier = Modifier,
+    leftRotation: Float = 0f,
+    rightRotation: Float = 0f,
+    scale: Boolean,
+    content: @Composable () -> Unit,
+) {
+    BinocularSize(scale) {
+        if (scale) {
+            BoxWithConstraints {
+                val parentWidth = constraints.maxWidth
+                PositionedBox(
+                    x = 0, y = 0, modifier = modifier
+                        .graphicsLayer {
+                            scaleX = 0.5f
+                            transformOrigin = TransformOrigin(0f, 0.5f)
+                        }
+                        .graphicsLayer {
+                            transformOrigin = TransformOrigin.Center
+                            rotationZ = leftRotation
+                        }
+                ) {
+                    CompositionLocalProvider(
+                        BinocularScreenSide provides Side.LEFT
+                    ) {
+                        content()
+                    }
+                }
+
+                PositionedBox(
+                    x = (parentWidth),
+                    y = 0,
+                    modifier = modifier
+                        .graphicsLayer {
+                            scaleX = 0.5f
+                            transformOrigin = TransformOrigin(0f, 0.5f)
+                        }
+                        .graphicsLayer {
+                            transformOrigin = TransformOrigin.Center
+                            rotationZ = rightRotation
+                        }
+                ) {
+                    CompositionLocalProvider(
+                        BinocularScreenSide provides Side.RIGHT
+                    ) {
+                        content()
+                    }
+                }
+            }
+        } else {
+            Row(modifier = modifier.focusable()) {
+                CompositionLocalProvider(
+                    BinocularScreenSide provides Side.LEFT
+                ) {
+                    Column(
+                        modifier = eachModifier
+                            .weight(1f, true)
+                            .then(leftModifier)
+                    ) { content() }
+                }
+//        Box(modifier = Modifier.width(1.dp).fillMaxHeight().background(color= Color.Green)) { Text("") }
+                CompositionLocalProvider(
+                    BinocularScreenSide provides Side.RIGHT
+                ) {
+                    Column(
+                        modifier = eachModifier
+                            .weight(1f, true)
+                            .then(rightModifier)
+                    ) { content() }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun PositionedBox(
+    x: Int,
+    y: Int,
+    modifier: Modifier = Modifier,
+    content: @Composable () -> Unit,
+) {
+    Layout(content = content, modifier = modifier) { measurables, constraints ->
+        val placeable = measurables.first().measure(constraints)
+        layout(constraints.maxWidth, constraints.maxHeight) {
+            placeable.placeRelative(x, y)
+        }
+    }
+}