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feat(vr-poc): Phase 1 scaffold — native OpenXR passthrough + quad panel

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NDK/C++ NativeActivity, arm64-v8a, Gradle 8.12 + AGP 8.7.3 + CMake 3.22.1.

Implementacja (main.cpp):
- EGL headless PBuffer context (wymagany przez OpenXR GLES binding)
- xrCreateInstance z XR_FB_passthrough + XR_KHR_opengl_es_enable
- xrCreateSession → XrGraphicsBindingOpenGLESAndroidKHR
- XR_FB_passthrough: xrCreatePassthroughFB / xrCreatePassthroughLayerFB
  (dynamiczne PFN, graceful fallback gdy extension niedostępna)
- Quad swapchain 512×256 — statyczny ciemnoniebieski panel 80×40 cm,
  1 m przed użytkownikiem (przygotowany pod stb_truetype w fazie 5)
- Pętla klatek: xrWaitFrame / xrBeginFrame / [passthrough + quad] / xrEndFrame
- environmentBlendMode = OPAQUE (passthrough przez warstwę FB_passthrough)

Brakujące pliki SDK (nie w git, lista w vr-poc/README.md):
- libs/arm64-v8a/libopenxr_loader.so   — z Meta OpenXR Mobile SDK
- ovr_sdk/OpenXR/Include/openxr/*.h    — nagłówki OpenXR

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Oskar Kapala 2026-06-10 15:33:27 +02:00
parent eaf49270c2
commit cc3d066854
17 changed files with 1195 additions and 0 deletions
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local.properties
.gradle/
build/
app/build/
app/.cxx/
*.keystore
# SDK files (prebuilt binaries i headery — nie w git)
libs/arm64-v8a/*.so
ovr_sdk/OpenXR/Include/openxr/*.h
ovr_sdk/OpenXR/Libs/**/*.so

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# vr-poc — Phase 1: passthrough + quad panel (native OpenXR, Quest 3)
Natywna apka C++/NDK, arm64-v8a. Renderuje passthrough + jeden statyczny panel
przed użytkownikiem. Brak LLM, brak TTS — czysty baseline do pomiaru FPS.
Szczegóły architektury: `../docs/POC_VR_SPEC.md`.
---
## Wymagane pliki SDK
Przed `./gradlew assembleDebug` musisz zainstalować toolchain i wrzucić dwa
zestawy plików. Poniżej dokładna lista — bez tych plików build nie przejdzie.
### 1. Android SDK + NDK + CMake
Zainstaluj przez Android Studio (SDK Manager) lub `sdkmanager`:
```bash
# Jeśli masz sdkmanager (cmdline-tools):
sdkmanager "platforms;android-35" \
"build-tools;35.0.0" \
"ndk;27.2.12479018" \
"cmake;3.22.1"
```
Oczekiwane lokalizacje (domyślna instalacja Linux):
```
~/Android/Sdk/platforms/android-35/
~/Android/Sdk/build-tools/35.0.0/
~/Android/Sdk/ndk/27.2.12479018/
~/Android/Sdk/cmake/3.22.1/
```
Następnie skopiuj `local.properties.template` → `local.properties`
(plik jest w `.gitignore`):
```bash
cp local.properties.template local.properties
# Upewnij się że sdk.dir wskazuje na Twój Android/Sdk
```
### 2. Meta OpenXR Mobile SDK — headery
Pobierz **Meta OpenXR Mobile SDK** z:
> https://developer.oculus.com/downloads/package/oculus-openxr-mobile-sdk/
Aktualnie testowana wersja: **v71** (lub nowsza).
Po pobraniu i rozpakowaniu skopiuj **dokładnie te 4 pliki**:
| Źródło w archiwum SDK | Cel w projekcie |
|--------------------------------------------------|-----------------------------------------------------|
| `OpenXR/Include/openxr/openxr.h` | `ovr_sdk/OpenXR/Include/openxr/openxr.h` |
| `OpenXR/Include/openxr/openxr_platform.h` | `ovr_sdk/OpenXR/Include/openxr/openxr_platform.h` |
| `OpenXR/Include/openxr/openxr_platform_defines.h`| `ovr_sdk/OpenXR/Include/openxr/openxr_platform_defines.h` |
| `OpenXR/Include/openxr/openxr_reflection.h` | `ovr_sdk/OpenXR/Include/openxr/openxr_reflection.h`|
Szybko przez jeden `cp -r`:
```bash
SDK_DIR=~/Downloads/ovr_sdk_mobile_openxr_v71 # dopasuj nazwę folderu
cp "$SDK_DIR"/OpenXR/Include/openxr/openxr*.h \
/home/oskar/projects/ipin-vr/vr-poc/ovr_sdk/OpenXR/Include/openxr/
```
### 3. Meta OpenXR Mobile SDK — loader `.so`
Z tego samego archiwum SDK skopiuj **loader** do `libs/arm64-v8a/`:
| Źródło w archiwum SDK | Cel w projekcie |
|--------------------------------------------------------------------------|----------------------------------------|
| `OpenXR/Libs/Android/arm64-v8a/Release/libopenxr_loader.so` | `libs/arm64-v8a/libopenxr_loader.so` |
```bash
cp "$SDK_DIR"/OpenXR/Libs/Android/arm64-v8a/Release/libopenxr_loader.so \
/home/oskar/projects/ipin-vr/vr-poc/libs/arm64-v8a/
```
Ten plik musi być w **dwóch miejscach** (albo możesz zrobić symlink):
- `libs/arm64-v8a/libopenxr_loader.so` — dla Gradle (pakuje do APK jako `lib/arm64-v8a/`)
- CMakeLists.txt czyta go z tej samej lokalizacji do linkowania
---
## Build i deploy
```bash
cd vr-poc/
# Weryfikacja: upewnij się że te pliki istnieją
ls libs/arm64-v8a/libopenxr_loader.so
ls ovr_sdk/OpenXR/Include/openxr/openxr.h
# Build APK (debug)
./gradlew assembleDebug
# Install na Quest 3 (włącz Developer Mode, podłącz USB)
adb install -r app/build/outputs/apk/debug/app-debug.apk
# Logi z apki
adb logcat -s ipin-vr-poc
```
APK output: `app/build/outputs/apk/debug/app-debug.apk`
---
## Weryfikacja Phase 1 (Definition of Done)
- [ ] `./gradlew assembleDebug` — SUCCESS
- [ ] `adb install` — wchodzi na urządzenie
- [ ] Apka startuje w passthrough (widać świat przez kamery)
- [ ] Pływający ciemnoniebieski panel widoczny ~1 m przed użytkownikiem
- [ ] OVR Metrics Tool pokazuje ≥ 72 FPS (brak stale frames)
Obserwacja FPS: uruchom OVR Metrics Tool na urządzeniu przed startem apki.
---
## Struktura kodu
```
vr-poc/
app/
CMakeLists.txt # CMake: native_app_glue + openxr_loader + ipin_vr_poc
src/main/
AndroidManifest.xml # NativeActivity, com.oculus.feature.PASSTHROUGH
cpp/
main.cpp # Cały OpenXR: EGL + passthrough + quad layer
res/values/strings.xml
libs/
arm64-v8a/
libopenxr_loader.so # [WRZUĆ TU — patrz §2/§3 powyżej]
ovr_sdk/
OpenXR/Include/openxr/ # [WRZUĆ TU headery — patrz §2 powyżej]
```
---
## Następne fazy (wg POC_VR_SPEC.md §12)
| Faza | Co dodajemy |
|------|-------------------------------------------------------|
| 2 | llama.cpp worker, generacja na trigger (log tok/s) |
| 3 | CPU affinity konfigurowalna, pomiar wpływu na FPS |
| 4 | sherpa-onnx + Oboe TTS |
| 5 | stb_truetype — tekst polecenia na panelu |
| 6 | Soak 15 min, logowanie, wykres FPS/temp |

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cmake_minimum_required(VERSION 3.22)
project(ipin_vr_poc VERSION 1 LANGUAGES C CXX)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
# ── Paths into ovr_sdk/ (one directory above app/) ───────────────────────────
set(OVR_SDK_ROOT "${CMAKE_SOURCE_DIR}/../ovr_sdk")
set(OPENXR_INCLUDE "${OVR_SDK_ROOT}/OpenXR/Include")
set(OPENXR_LIB_DIR "${CMAKE_SOURCE_DIR}/../libs/arm64-v8a")
if (NOT EXISTS "${OPENXR_INCLUDE}/openxr/openxr.h")
message(FATAL_ERROR
"openxr.h not found at ${OPENXR_INCLUDE}/openxr/openxr.h\n"
"See vr-poc/README.md §'Wymagane pliki SDK' for setup instructions.")
endif()
# ── android_native_app_glue (from NDK) ───────────────────────────────────────
add_library(native_app_glue STATIC
${ANDROID_NDK}/sources/android/native_app_glue/android_native_app_glue.c
)
target_include_directories(native_app_glue PUBLIC
${ANDROID_NDK}/sources/android/native_app_glue
)
target_link_libraries(native_app_glue PUBLIC android log)
# ── OpenXR loader (prebuilt, from Meta OVR SDK → libs/arm64-v8a/) ─────────────
add_library(openxr_loader SHARED IMPORTED)
set_target_properties(openxr_loader PROPERTIES
IMPORTED_LOCATION "${OPENXR_LIB_DIR}/libopenxr_loader.so"
)
# ── NDK system libraries ──────────────────────────────────────────────────────
find_library(LIB_ANDROID android)
find_library(LIB_LOG log)
find_library(LIB_EGL EGL)
find_library(LIB_GLES3 GLESv3)
# ── Main native library ───────────────────────────────────────────────────────
add_library(ipin_vr_poc SHARED
src/main/cpp/main.cpp
)
target_include_directories(ipin_vr_poc PRIVATE
${OPENXR_INCLUDE}
${ANDROID_NDK}/sources/android/native_app_glue
)
target_compile_definitions(ipin_vr_poc PRIVATE
XR_USE_PLATFORM_ANDROID
XR_USE_GRAPHICS_API_OPENGL_ES
)
target_link_libraries(ipin_vr_poc PRIVATE
native_app_glue
openxr_loader
${LIB_ANDROID}
${LIB_LOG}
${LIB_EGL}
${LIB_GLES3}
)
# Force export of android_main (entry point for NativeActivity)
target_link_options(ipin_vr_poc PRIVATE "-Wl,--undefined=android_main")

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plugins {
id 'com.android.application'
}
android {
namespace 'com.ipin.vr.poc'
compileSdk 35
defaultConfig {
applicationId "com.ipin.vr.poc"
minSdk 29
targetSdk 32
versionCode 1
versionName "1.0.0-phase1"
ndk {
abiFilters "arm64-v8a"
}
externalNativeBuild {
cmake {
cppFlags "-std=c++17 -O2 -fvisibility=hidden"
arguments "-DANDROID_STL=c++_shared",
"-DANDROID_ARM_NEON=TRUE"
}
}
}
ndkVersion "27.2.12479018"
externalNativeBuild {
cmake {
path "CMakeLists.txt"
version "3.22.1"
}
}
buildTypes {
debug {
debuggable true
jniDebuggable true
minifyEnabled false
}
release {
minifyEnabled false
signingConfig signingConfigs.debug
}
}
sourceSets {
main {
// Prebuilt libopenxr_loader.so — user drops it in libs/arm64-v8a/
jniLibs.srcDirs += ['../libs']
}
}
// Keep .so symbols in debug builds for logcat crash symbolication
packagingOptions {
doNotStrip "**/*.so"
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_11
targetCompatibility JavaVersion.VERSION_11
}
}

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Quest 3: passthrough requires this feature declaration -->
<uses-feature
android:name="com.oculus.feature.PASSTHROUGH"
android:required="true" />
<!-- Standard VR head-tracking -->
<uses-feature
android:name="android.hardware.vr.headtracking"
android:required="true"
android:version="1" />
<application
android:label="@string/app_name"
android:hasCode="false"
android:extractNativeLibs="true">
<activity
android:name="android.app.NativeActivity"
android:exported="true"
android:label="@string/app_name"
android:screenOrientation="landscape"
android:configChanges="density|keyboard|keyboardHidden|navigation|orientation|screenLayout|screenSize|uiMode"
android:launchMode="singleTask">
<!-- NativeActivity loads this .so as entry point -->
<meta-data
android:name="android.app.lib_name"
android:value="ipin_vr_poc" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<!-- Marks this as a VR app for Horizon OS home menu -->
<category android:name="com.oculus.intent.category.VR" />
</intent-filter>
</activity>
</application>
</manifest>

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// ipin-vr-poc — Phase 1: passthrough + static quad panel
// No LLM, no TTS. Render-only baseline for FPS measurement (§12 Phase 1).
//
// Build requires:
// - Meta OpenXR Mobile SDK headers in ovr_sdk/OpenXR/Include/
// - libopenxr_loader.so in libs/arm64-v8a/
// See README.md §"Wymagane pliki SDK".
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES3/gl3.h>
#include <android/log.h>
#include <android_native_app_glue.h>
#include <openxr/openxr.h>
#include <openxr/openxr_platform.h>
#include <array>
#include <cassert>
#include <cstring>
#include <vector>
#define TAG "ipin-vr-poc"
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, TAG, __VA_ARGS__)
#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, TAG, __VA_ARGS__)
#define LOGW(...) __android_log_print(ANDROID_LOG_WARN, TAG, __VA_ARGS__)
// Aborts on XrResult failure — only used during init where recovery is not possible.
#define CHK_XR(expr) \
do { \
XrResult _r = (expr); \
if (XR_FAILED(_r)) { \
LOGE("XR FAIL %d at " __FILE__ ":%d " #expr, _r, __LINE__); \
return false; \
} \
} while (0)
// ── XR_FB_passthrough dynamic function pointers ───────────────────────────────
static PFN_xrCreatePassthroughFB pfn_xrCreatePassthroughFB = nullptr;
static PFN_xrDestroyPassthroughFB pfn_xrDestroyPassthroughFB = nullptr;
static PFN_xrPassthroughStartFB pfn_xrPassthroughStartFB = nullptr;
static PFN_xrPassthroughPauseFB pfn_xrPassthroughPauseFB = nullptr;
static PFN_xrCreatePassthroughLayerFB pfn_xrCreatePassthroughLayerFB = nullptr;
static PFN_xrDestroyPassthroughLayerFB pfn_xrDestroyPassthroughLayerFB = nullptr;
static PFN_xrPassthroughLayerResumeFB pfn_xrPassthroughLayerResumeFB = nullptr;
static PFN_xrPassthroughLayerPauseFB pfn_xrPassthroughLayerPauseFB = nullptr;
// ── EGL context (headless PBuffer — required by OpenXR GLES binding) ─────────
struct EglCtx {
EGLDisplay display = EGL_NO_DISPLAY;
EGLConfig config = {};
EGLContext context = EGL_NO_CONTEXT;
EGLSurface surface = EGL_NO_SURFACE;
bool init() {
display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (display == EGL_NO_DISPLAY) { LOGE("eglGetDisplay failed"); return false; }
EGLint major = 0, minor = 0;
if (!eglInitialize(display, &major, &minor)) {
LOGE("eglInitialize failed"); return false;
}
LOGI("EGL %d.%d", major, minor);
const EGLint cfg_attrs[] = {
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT,
EGL_RED_SIZE, 8, EGL_GREEN_SIZE, 8, EGL_BLUE_SIZE, 8, EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, 0,
EGL_NONE
};
EGLint n = 0;
if (!eglChooseConfig(display, cfg_attrs, &config, 1, &n) || n == 0) {
LOGE("eglChooseConfig failed"); return false;
}
const EGLint ctx_attrs[] = { EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE };
context = eglCreateContext(display, config, EGL_NO_CONTEXT, ctx_attrs);
if (context == EGL_NO_CONTEXT) { LOGE("eglCreateContext failed"); return false; }
// Tiny PBuffer — we never render to it, OpenXR swapchain images are the real targets
const EGLint pb_attrs[] = { EGL_WIDTH, 16, EGL_HEIGHT, 16, EGL_NONE };
surface = eglCreatePbufferSurface(display, config, pb_attrs);
if (surface == EGL_NO_SURFACE) { LOGE("eglCreatePbufferSurface failed"); return false; }
if (!eglMakeCurrent(display, surface, surface, context)) {
LOGE("eglMakeCurrent failed"); return false;
}
LOGI("GLES3 context ready");
return true;
}
void destroy() {
if (display != EGL_NO_DISPLAY) {
eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (context != EGL_NO_CONTEXT) eglDestroyContext(display, context);
if (surface != EGL_NO_SURFACE) eglDestroySurface(display, surface);
eglTerminate(display);
}
display = EGL_NO_DISPLAY;
context = EGL_NO_CONTEXT;
surface = EGL_NO_SURFACE;
}
};
// ── Application state ─────────────────────────────────────────────────────────
struct App {
android_app* native_app = nullptr;
EglCtx egl;
XrInstance instance = XR_NULL_HANDLE;
XrSystemId system_id = XR_NULL_SYSTEM_ID;
XrSession session = XR_NULL_HANDLE;
XrSpace ref_space = XR_NULL_HANDLE;
// XR_FB_passthrough
XrPassthroughFB passthrough = XR_NULL_HANDLE;
XrPassthroughLayerFB passthrough_layer = XR_NULL_HANDLE;
bool has_passthrough = false;
// Quad swapchain — one 2D panel floating in front of the user
XrSwapchain quad_swapchain = XR_NULL_HANDLE;
uint32_t quad_w = 512;
uint32_t quad_h = 256;
std::vector<XrSwapchainImageOpenGLESKHR> quad_images;
// Session state machine
XrSessionState session_state = XR_SESSION_STATE_UNKNOWN;
bool session_running = false;
bool exit_requested = false;
};
static App g_app;
// ─────────────────────────────────────────────────────────────────────────────
static void load_ext_fns(XrInstance inst) {
#define LOAD(fn) xrGetInstanceProcAddr(inst, #fn, (PFN_xrVoidFunction*)&pfn_##fn)
LOAD(xrCreatePassthroughFB);
LOAD(xrDestroyPassthroughFB);
LOAD(xrPassthroughStartFB);
LOAD(xrPassthroughPauseFB);
LOAD(xrCreatePassthroughLayerFB);
LOAD(xrDestroyPassthroughLayerFB);
LOAD(xrPassthroughLayerResumeFB);
LOAD(xrPassthroughLayerPauseFB);
#undef LOAD
if (!pfn_xrCreatePassthroughFB)
LOGW("XR_FB_passthrough functions not loaded — passthrough disabled");
}
// ── Init ──────────────────────────────────────────────────────────────────────
static bool create_instance(App& app) {
XrInstanceCreateInfoAndroidKHR android_info{XR_TYPE_INSTANCE_CREATE_INFO_ANDROID_KHR};
android_info.applicationVM = app.native_app->activity->vm;
android_info.applicationContext = app.native_app->activity->clazz;
const char* extensions[] = {
XR_KHR_ANDROID_CREATE_INSTANCE_EXTENSION_NAME, // "XR_KHR_android_create_instance"
XR_KHR_OPENGL_ES_ENABLE_EXTENSION_NAME, // "XR_KHR_opengl_es_enable"
XR_FB_PASSTHROUGH_EXTENSION_NAME, // "XR_FB_passthrough"
};
XrApplicationInfo app_info{};
strncpy(app_info.applicationName, "ipin-vr-poc", XR_MAX_APPLICATION_NAME_SIZE - 1);
app_info.apiVersion = XR_CURRENT_API_VERSION;
XrInstanceCreateInfo ci{XR_TYPE_INSTANCE_CREATE_INFO};
ci.next = &android_info;
ci.applicationInfo = app_info;
ci.enabledExtensionCount = static_cast<uint32_t>(std::size(extensions));
ci.enabledExtensionNames = extensions;
CHK_XR(xrCreateInstance(&ci, &app.instance));
XrInstanceProperties ip{XR_TYPE_INSTANCE_PROPERTIES};
xrGetInstanceProperties(app.instance, &ip);
LOGI("XrInstance OK — runtime: %s", ip.runtimeName);
return true;
}
static bool get_system(App& app) {
XrSystemGetInfo sgi{XR_TYPE_SYSTEM_GET_INFO};
sgi.formFactor = XR_FORM_FACTOR_HEAD_MOUNTED_DISPLAY;
CHK_XR(xrGetSystem(app.instance, &sgi, &app.system_id));
XrSystemProperties sp{XR_TYPE_SYSTEM_PROPERTIES};
xrGetSystemProperties(app.instance, app.system_id, &sp);
LOGI("System: %s", sp.systemName);
return true;
}
static bool create_session(App& app) {
// Verify GLES is supported by this system
XrGraphicsRequirementsOpenGLESKHR gfx_req{XR_TYPE_GRAPHICS_REQUIREMENTS_OPENGL_ES_KHR};
PFN_xrGetOpenGLESGraphicsRequirementsKHR pfn_gfx_req = nullptr;
xrGetInstanceProcAddr(app.instance, "xrGetOpenGLESGraphicsRequirementsKHR",
(PFN_xrVoidFunction*)&pfn_gfx_req);
if (pfn_gfx_req)
pfn_gfx_req(app.instance, app.system_id, &gfx_req);
XrGraphicsBindingOpenGLESAndroidKHR binding{XR_TYPE_GRAPHICS_BINDING_OPENGL_ES_ANDROID_KHR};
binding.display = app.egl.display;
binding.config = app.egl.config;
binding.context = app.egl.context;
XrSessionCreateInfo sci{XR_TYPE_SESSION_CREATE_INFO};
sci.next = &binding;
sci.systemId = app.system_id;
CHK_XR(xrCreateSession(app.instance, &sci, &app.session));
LOGI("XrSession created");
// LOCAL space: floating panel stays fixed relative to room origin at startup
XrReferenceSpaceCreateInfo rsci{XR_TYPE_REFERENCE_SPACE_CREATE_INFO};
rsci.referenceSpaceType = XR_REFERENCE_SPACE_TYPE_LOCAL;
rsci.poseInReferenceSpace = {{0.f, 0.f, 0.f, 1.f}, {0.f, 0.f, 0.f}};
CHK_XR(xrCreateReferenceSpace(app.session, &rsci, &app.ref_space));
return true;
}
static bool init_passthrough(App& app) {
if (!pfn_xrCreatePassthroughFB) {
app.has_passthrough = false;
return true;
}
XrPassthroughCreateInfoFB ptci{XR_TYPE_PASSTHROUGH_CREATE_INFO_FB};
ptci.flags = XR_PASSTHROUGH_IS_RUNNING_AT_CREATION_BIT_FB;
if (XR_FAILED(pfn_xrCreatePassthroughFB(app.session, &ptci, &app.passthrough))) {
LOGW("xrCreatePassthroughFB failed — running without passthrough");
app.has_passthrough = false;
return true;
}
XrPassthroughLayerCreateInfoFB ptlci{XR_TYPE_PASSTHROUGH_LAYER_CREATE_INFO_FB};
ptlci.passthrough = app.passthrough;
ptlci.flags = XR_PASSTHROUGH_IS_RUNNING_AT_CREATION_BIT_FB;
ptlci.purpose = XR_PASSTHROUGH_LAYER_PURPOSE_RECONSTRUCTION_FB;
if (XR_FAILED(pfn_xrCreatePassthroughLayerFB(app.session, &ptlci, &app.passthrough_layer))) {
LOGW("xrCreatePassthroughLayerFB failed — running without passthrough");
pfn_xrDestroyPassthroughFB(app.passthrough);
app.passthrough = XR_NULL_HANDLE;
app.has_passthrough = false;
return true;
}
app.has_passthrough = true;
LOGI("Passthrough enabled (XR_FB_passthrough)");
return true;
}
static bool create_quad_swapchain(App& app) {
// Pick a supported swapchain format — prefer SRGB8_ALPHA8
uint32_t fmt_count = 0;
xrEnumerateSwapchainFormats(app.session, 0, &fmt_count, nullptr);
std::vector<int64_t> fmts(fmt_count);
xrEnumerateSwapchainFormats(app.session, fmt_count, &fmt_count, fmts.data());
int64_t chosen = fmts.empty() ? GL_RGBA8 : fmts[0];
for (int64_t f : fmts) {
if (f == GL_SRGB8_ALPHA8) { chosen = f; break; }
if (f == GL_RGBA8) { chosen = f; }
}
LOGI("Quad swapchain format: 0x%llx", (unsigned long long)chosen);
XrSwapchainCreateInfo sci{XR_TYPE_SWAPCHAIN_CREATE_INFO};
sci.usageFlags = XR_SWAPCHAIN_USAGE_COLOR_ATTACHMENT_BIT | XR_SWAPCHAIN_USAGE_SAMPLED_BIT;
sci.format = chosen;
sci.sampleCount = 1;
sci.width = app.quad_w;
sci.height = app.quad_h;
sci.faceCount = 1;
sci.arraySize = 1;
sci.mipCount = 1;
CHK_XR(xrCreateSwapchain(app.session, &sci, &app.quad_swapchain));
uint32_t img_count = 0;
xrEnumerateSwapchainImages(app.quad_swapchain, 0, &img_count, nullptr);
app.quad_images.resize(img_count, {XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_ES_KHR});
xrEnumerateSwapchainImages(app.quad_swapchain, img_count, &img_count,
reinterpret_cast<XrSwapchainImageBaseHeader*>(app.quad_images.data()));
// Paint all swapchain images once: dark semi-transparent panel.
// Phase 5 will rasterise Polish text here with stb_truetype.
GLuint fbo = 0;
glGenFramebuffers(1, &fbo);
for (const auto& img : app.quad_images) {
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, img.image, 0);
glViewport(0, 0, (GLsizei)app.quad_w, (GLsizei)app.quad_h);
// Navy panel: R=0.05 G=0.05 B=0.18 A=0.88 — visible on passthrough, not blinding
glClearColor(0.05f, 0.05f, 0.18f, 0.88f);
glClear(GL_COLOR_BUFFER_BIT);
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDeleteFramebuffers(1, &fbo);
LOGI("Quad swapchain OK: %ux%u, %u images", app.quad_w, app.quad_h, img_count);
return true;
}
static bool openxr_init(App& app) {
if (!app.egl.init()) return false;
if (!create_instance(app)) return false;
load_ext_fns(app.instance);
if (!get_system(app)) return false;
if (!create_session(app)) return false;
if (!init_passthrough(app)) return false;
if (!create_quad_swapchain(app)) return false;
return true;
}
// ── Frame loop ────────────────────────────────────────────────────────────────
static void render_frame(App& app) {
XrFrameWaitInfo fwi{XR_TYPE_FRAME_WAIT_INFO};
XrFrameState fs {XR_TYPE_FRAME_STATE};
if (XR_FAILED(xrWaitFrame(app.session, &fwi, &fs))) return;
XrFrameBeginInfo fbi{XR_TYPE_FRAME_BEGIN_INFO};
if (XR_FAILED(xrBeginFrame(app.session, &fbi))) return;
std::vector<XrCompositionLayerBaseHeader*> layers;
// ── Layer 0: passthrough (world background) ───────────────────────────────
XrCompositionLayerPassthroughFB pt_layer{XR_TYPE_COMPOSITION_LAYER_PASSTHROUGH_FB};
if (app.has_passthrough) {
pt_layer.flags = 0;
pt_layer.space = XR_NULL_HANDLE; // required by spec
pt_layer.layerHandle = app.passthrough_layer;
layers.push_back(reinterpret_cast<XrCompositionLayerBaseHeader*>(&pt_layer));
}
// ── Layer 1: quad panel ────────────────────────────────────────────────────
XrCompositionLayerQuad quad_layer{XR_TYPE_COMPOSITION_LAYER_QUAD};
if (fs.shouldRender) {
XrSwapchainImageAcquireInfo ai{XR_TYPE_SWAPCHAIN_IMAGE_ACQUIRE_INFO};
uint32_t idx = 0;
xrAcquireSwapchainImage(app.quad_swapchain, &ai, &idx);
XrSwapchainImageWaitInfo wi{XR_TYPE_SWAPCHAIN_IMAGE_WAIT_INFO};
wi.timeout = XR_INFINITE_DURATION;
xrWaitSwapchainImage(app.quad_swapchain, &wi);
// Content is static (painted at init).
// Phase 5: re-render text here when polecenie changes.
XrSwapchainImageReleaseInfo ri{XR_TYPE_SWAPCHAIN_IMAGE_RELEASE_INFO};
xrReleaseSwapchainImage(app.quad_swapchain, &ri);
// Panel position: centred, 1 m in front, 25 cm below eye level
XrPosef pose{};
pose.orientation = {0.f, 0.f, 0.f, 1.f}; // identity — faces the user
pose.position = {0.f, -0.25f, -1.0f}; // x=0, y=-25cm, z=-1m
quad_layer.layerFlags = XR_COMPOSITION_LAYER_BLEND_TEXTURE_SOURCE_ALPHA_BIT;
quad_layer.space = app.ref_space;
quad_layer.eyeVisibility = XR_EYE_VISIBILITY_BOTH;
quad_layer.subImage.swapchain = app.quad_swapchain;
quad_layer.subImage.imageRect.offset = {0, 0};
quad_layer.subImage.imageRect.extent = {(int32_t)app.quad_w, (int32_t)app.quad_h};
quad_layer.subImage.imageArrayIndex = 0;
quad_layer.pose = pose;
quad_layer.size = {0.80f, 0.40f}; // 80 cm × 40 cm
layers.push_back(reinterpret_cast<XrCompositionLayerBaseHeader*>(&quad_layer));
}
XrFrameEndInfo fei{XR_TYPE_FRAME_END_INFO};
fei.displayTime = fs.predictedDisplayTime;
// OPAQUE + passthrough layer = real world visible through FB_passthrough
fei.environmentBlendMode = XR_ENVIRONMENT_BLEND_MODE_OPAQUE;
fei.layerCount = static_cast<uint32_t>(layers.size());
fei.layers = layers.empty() ? nullptr : layers.data();
xrEndFrame(app.session, &fei);
}
// ── Event handling ────────────────────────────────────────────────────────────
static void poll_xr_events(App& app) {
XrEventDataBuffer ev{XR_TYPE_EVENT_DATA_BUFFER};
while (xrPollEvent(app.instance, &ev) == XR_SUCCESS) {
switch (ev.type) {
case XR_TYPE_EVENT_DATA_SESSION_STATE_CHANGED: {
const auto* e = reinterpret_cast<XrEventDataSessionStateChanged*>(&ev);
app.session_state = e->state;
LOGI("Session state → %d", (int)app.session_state);
switch (e->state) {
case XR_SESSION_STATE_READY: {
XrSessionBeginInfo sbi{XR_TYPE_SESSION_BEGIN_INFO};
sbi.primaryViewConfigurationType =
XR_VIEW_CONFIGURATION_TYPE_PRIMARY_STEREO;
if (XR_SUCCEEDED(xrBeginSession(app.session, &sbi))) {
app.session_running = true;
LOGI("Session started");
}
break;
}
case XR_SESSION_STATE_STOPPING:
xrEndSession(app.session);
app.session_running = false;
break;
case XR_SESSION_STATE_EXITING:
case XR_SESSION_STATE_LOSS_PENDING:
app.exit_requested = true;
break;
default:
break;
}
break;
}
case XR_TYPE_EVENT_DATA_INSTANCE_LOSS_PENDING:
app.exit_requested = true;
break;
default:
break;
}
ev = {XR_TYPE_EVENT_DATA_BUFFER};
}
}
// ── Android lifecycle ─────────────────────────────────────────────────────────
static void on_app_cmd(android_app* a, int32_t cmd) {
(void)a; (void)cmd;
// NativeActivity lifecycle: OpenXR session state machine drives rendering.
}
// ── Entry point ───────────────────────────────────────────────────────────────
void android_main(android_app* state) {
LOGI("=== ipin-vr-poc phase 1 start ===");
g_app.native_app = state;
state->userData = &g_app;
state->onAppCmd = on_app_cmd;
if (!openxr_init(g_app)) {
LOGE("OpenXR init failed — aborting");
return;
}
LOGI("Entering main loop");
while (!g_app.exit_requested) {
// Drain Android event queue (0 = non-blocking poll)
int events = 0;
android_poll_source* src = nullptr;
while (ALooper_pollAll(0, nullptr, &events,
reinterpret_cast<void**>(&src)) >= 0) {
if (src) src->process(state, src);
if (state->destroyRequested) {
g_app.exit_requested = true;
break;
}
}
poll_xr_events(g_app);
const bool can_render =
g_app.session_running &&
(g_app.session_state == XR_SESSION_STATE_VISIBLE ||
g_app.session_state == XR_SESSION_STATE_FOCUSED);
if (can_render) render_frame(g_app);
}
LOGI("Shutting down");
if (g_app.passthrough_layer != XR_NULL_HANDLE)
pfn_xrDestroyPassthroughLayerFB(g_app.passthrough_layer);
if (g_app.passthrough != XR_NULL_HANDLE)
pfn_xrDestroyPassthroughFB(g_app.passthrough);
if (g_app.quad_swapchain != XR_NULL_HANDLE)
xrDestroySwapchain(g_app.quad_swapchain);
if (g_app.ref_space != XR_NULL_HANDLE)
xrDestroySpace(g_app.ref_space);
if (g_app.session != XR_NULL_HANDLE)
xrDestroySession(g_app.session);
if (g_app.instance != XR_NULL_HANDLE)
xrDestroyInstance(g_app.instance);
g_app.egl.destroy();
LOGI("=== ipin-vr-poc phase 1 exit ===");
}

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<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">ipin-vr poc</string>
</resources>

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plugins {
id 'com.android.application' version '8.7.3' apply false
}

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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
networkTimeout=10000
validateDistributionUrl=true
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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#!/bin/sh
#
# Copyright © 2015-2021 the original authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
##############################################################################
#
# Gradle start up script for POSIX generated by Gradle.
#
# Important for running:
#
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
# noncompliant, but you have some other compliant shell such as ksh or
# bash, then to run this script, type that shell name before the whole
# command line, like:
#
# ksh Gradle
#
# Busybox and similar reduced shells will NOT work, because this script
# requires all of these POSIX shell features:
# * functions;
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
# * compound commands having a testable exit status, especially «case»;
# * various built-in commands including «command», «set», and «ulimit».
#
# Important for patching:
#
# (2) This script targets any POSIX shell, so it avoids extensions provided
# by Bash, Ksh, etc; in particular arrays are avoided.
#
# The "traditional" practice of packing multiple parameters into a
# space-separated string is a well documented source of bugs and security
# problems, so this is (mostly) avoided, by progressively accumulating
# options in "$@", and eventually passing that to Java.
#
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
# see the in-line comments for details.
#
# There are tweaks for specific operating systems such as AIX, CygWin,
# Darwin, MinGW, and NonStop.
#
# (3) This script is generated from the Groovy template
# https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
# within the Gradle project.
#
# You can find Gradle at https://github.com/gradle/gradle/.
#
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
app_path=$0
# Need this for daisy-chained symlinks.
while
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
[ -h "$app_path" ]
do
ls=$( ls -ld "$app_path" )
link=${ls#*' -> '}
case $link in #(
/*) app_path=$link ;; #(
*) app_path=$APP_HOME$link ;;
esac
done
# This is normally unused
# shellcheck disable=SC2034
APP_BASE_NAME=${0##*/}
# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD=maximum
warn () {
echo "$*"
} >&2
die () {
echo
echo "$*"
echo
exit 1
} >&2
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "$( uname )" in #(
CYGWIN* ) cygwin=true ;; #(
Darwin* ) darwin=true ;; #(
MSYS* | MINGW* ) msys=true ;; #(
NONSTOP* ) nonstop=true ;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD=$JAVA_HOME/jre/sh/java
else
JAVACMD=$JAVA_HOME/bin/java
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD=java
if ! command -v java >/dev/null 2>&1
then
die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
fi
# Increase the maximum file descriptors if we can.
if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
case $MAX_FD in #(
max*)
# In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC2039,SC3045
MAX_FD=$( ulimit -H -n ) ||
warn "Could not query maximum file descriptor limit"
esac
case $MAX_FD in #(
'' | soft) :;; #(
*)
# In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC2039,SC3045
ulimit -n "$MAX_FD" ||
warn "Could not set maximum file descriptor limit to $MAX_FD"
esac
fi
# Collect all arguments for the java command, stacking in reverse order:
# * args from the command line
# * the main class name
# * -classpath
# * -D...appname settings
# * --module-path (only if needed)
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
# For Cygwin or MSYS, switch paths to Windows format before running java
if "$cygwin" || "$msys" ; then
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
JAVACMD=$( cygpath --unix "$JAVACMD" )
# Now convert the arguments - kludge to limit ourselves to /bin/sh
for arg do
if
case $arg in #(
-*) false ;; # don't mess with options #(
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
[ -e "$t" ] ;; #(
*) false ;;
esac
then
arg=$( cygpath --path --ignore --mixed "$arg" )
fi
# Roll the args list around exactly as many times as the number of
# args, so each arg winds up back in the position where it started, but
# possibly modified.
#
# NB: a `for` loop captures its iteration list before it begins, so
# changing the positional parameters here affects neither the number of
# iterations, nor the values presented in `arg`.
shift # remove old arg
set -- "$@" "$arg" # push replacement arg
done
fi
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Collect all arguments for the java command:
# * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
# and any embedded shellness will be escaped.
# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
# treated as '${Hostname}' itself on the command line.
set -- \
"-Dorg.gradle.appname=$APP_BASE_NAME" \
-classpath "$CLASSPATH" \
org.gradle.wrapper.GradleWrapperMain \
"$@"
# Stop when "xargs" is not available.
if ! command -v xargs >/dev/null 2>&1
then
die "xargs is not available"
fi
# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
# set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#
# This will of course break if any of these variables contains a newline or
# an unmatched quote.
#
eval "set -- $(
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
xargs -n1 |
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
tr '\n' ' '
)" '"$@"'
exec "$JAVACMD" "$@"

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@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%"=="" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%"=="" set DIRNAME=.
@rem This is normally unused
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if %ERRORLEVEL% equ 0 goto execute
echo. 1>&2
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
echo. 1>&2
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
echo location of your Java installation. 1>&2
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo. 1>&2
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
echo. 1>&2
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
echo location of your Java installation. 1>&2
goto fail
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
:end
@rem End local scope for the variables with windows NT shell
if %ERRORLEVEL% equ 0 goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
set EXIT_CODE=%ERRORLEVEL%
if %EXIT_CODE% equ 0 set EXIT_CODE=1
if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
exit /b %EXIT_CODE%
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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# Tu wrzuć libopenxr_loader.so z Meta OpenXR Mobile SDK
# Szczegóły: vr-poc/README.md §"Wymagane pliki SDK"

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# Skopiuj do local.properties (nie trafia do git)
sdk.dir=/home/oskar/Android/Sdk
# ndk.dir jest opcjonalne gdy ndkVersion jest w build.gradle

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vr-poc/ovr_sdk/OpenXR/Include/openxr/.gitkeep Normal file
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# Tu wrzuć headery z Meta OpenXR Mobile SDK:
# openxr.h openxr_platform.h openxr_reflection.h openxr_platform_defines.h
# Szczegóły: vr-poc/README.md §"Wymagane pliki SDK"

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vr-poc/ovr_sdk/OpenXR/Libs/Android/arm64-v8a/.gitkeep Normal file
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# Tu wrzuć libopenxr_loader.so (Release)
# Ale prościej: skopiuj do vr-poc/libs/arm64-v8a/ — jeden plik, jedno miejsce.
# Szczegóły: vr-poc/README.md §"Wymagane pliki SDK"

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pluginManagement {
repositories {
google()
mavenCentral()
gradlePluginPortal()
}
}
dependencyResolutionManagement {
repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
repositories {
google()
mavenCentral()
}
}
rootProject.name = "ipin-vr-poc"
include ':app'