feat: ✨ Add Lynx headset support

README.md

@@ -15,6 +15,7 @@ This is a fork of [ALVR](https://github.com/polygraphene/ALVR).
 |     Pico 4/Neo 3      |                              :heavy_check_mark:                               |
 | Vive Focus 3/XR Elite |                              :heavy_check_mark:                               |
 |        YVR 1/2        |                              :heavy_check_mark:                               |
+|        Lynx R1        |                              :heavy_check_mark:                               |
 |   Google Cardboard    | :heavy_check_mark: ([PhoneVR](https://github.com/PhoneVR-Developers/PhoneVR)) |
 |   Smartphone/Monado   |                               :construction: *                                |
 |        GearVR         |                           :construction: * (maybe)                            |

alvr/client_core/cpp/bindings.h

@@ -22,6 +22,7 @@ struct FfiStreamConfig {
     float foveationCenterShiftY;
     float foveationEdgeRatioX;
     float foveationEdgeRatioY;
+    unsigned int enableSrgbCorrection;
 };
 
 // gltf_model.h

alvr/client_core/cpp/graphics.cpp

@@ -62,7 +62,7 @@ typedef struct {
 enum ovrProgramType {
     STREAMER_PROG,
     LOBBY_PROG,
-    MAX_PROGS // Not to be used as a type, just a placeholder for len    
+    MAX_PROGS // Not to be used as a type, just a placeholder for len
 };
 
 typedef struct {
@@ -95,12 +95,11 @@ typedef struct {
 } ovrVertexAttribute;
 
 ovrVertexAttribute ProgramVertexAttributes[] = {
-    {VERTEX_ATTRIBUTE_LOCATION_POSITION, "vertexPosition",      {true,  true }},
-    {VERTEX_ATTRIBUTE_LOCATION_COLOR, "vertexColor",            {true,  false}},
-    {VERTEX_ATTRIBUTE_LOCATION_UV, "vertexUv",                  {true,  true }},
-    {VERTEX_ATTRIBUTE_LOCATION_TRANSFORM, "vertexTransform",    {false, false}},
-    {VERTEX_ATTRIBUTE_LOCATION_NORMAL, "vertexNormal",          {false, true }}
-};
+    {VERTEX_ATTRIBUTE_LOCATION_POSITION, "vertexPosition", {true, true}},
+    {VERTEX_ATTRIBUTE_LOCATION_COLOR, "vertexColor", {true, false}},
+    {VERTEX_ATTRIBUTE_LOCATION_UV, "vertexUv", {true, true}},
+    {VERTEX_ATTRIBUTE_LOCATION_TRANSFORM, "vertexTransform", {false, false}},
+    {VERTEX_ATTRIBUTE_LOCATION_NORMAL, "vertexNormal", {false, true}}};
 
 enum E1test {
     UNIFORM_VIEW_ID,
@@ -428,7 +427,10 @@ void ovrGeometry_DestroyVAO(ovrGeometry *geometry) {
 
 static const char *programVersion = "#version 300 es\n";
 
-bool ovrProgram_Create(ovrProgram *program, const char *vertexSource, const char *fragmentSource, ovrProgramType progType) {
+bool ovrProgram_Create(ovrProgram *program,
+                       const char *vertexSource,
+                       const char *fragmentSource,
+                       ovrProgramType progType) {
     GLint r;
 
     LOGI("Compiling shaders.");
@@ -468,12 +470,16 @@ bool ovrProgram_Create(ovrProgram *program, const char *vertexSource, const char
     // Bind the vertex attribute locations.
     for (size_t i = 0; i < sizeof(ProgramVertexAttributes) / sizeof(ProgramVertexAttributes[0]);
          i++) {
-        // Only bind vertex attributes which are used/active in shader else causes uncessary bugs via compiler optimization/aliasing
+        // Only bind vertex attributes which are used/active in shader else causes uncessary bugs
+        // via compiler optimization/aliasing
         if (ProgramVertexAttributes[i].usedInProg[progType]) {
             GL(glBindAttribLocation(program->streamProgram,
-                                ProgramVertexAttributes[i].location,
-                                ProgramVertexAttributes[i].name));
-            LOGD("Binding ProgramVertexAttribute [id.%d] %s to location %d", i, ProgramVertexAttributes[i].name, ProgramVertexAttributes[i].location);
+                                    ProgramVertexAttributes[i].location,
+                                    ProgramVertexAttributes[i].name));
+            LOGD("Binding ProgramVertexAttribute [id.%d] %s to location %d",
+                 i,
+                 ProgramVertexAttributes[i].name,
+                 ProgramVertexAttributes[i].location);
         }
     }
 
@@ -551,19 +557,22 @@ void ovrRenderer_Create(ovrRenderer *renderer,
                         int hudTexture,
                         std::vector<GLuint> textures[2],
                         FFRData ffrData,
-                        bool isLobby) {
+                        bool isLobby,
+                        bool enableSrgbCorrection) {
     if (!isLobby) {
         renderer->srgbCorrectionPass = std::make_unique<SrgbCorrectionPass>(streamTexture);
         renderer->enableFFR = ffrData.enabled;
         if (renderer->enableFFR) {
             FoveationVars fv = CalculateFoveationVars(ffrData);
-            renderer->srgbCorrectionPass->Initialize(fv.optimizedEyeWidth, fv.optimizedEyeHeight);
+            renderer->srgbCorrectionPass->Initialize(
+                fv.optimizedEyeWidth, fv.optimizedEyeHeight, !enableSrgbCorrection);
             renderer->ffr = std::make_unique<FFR>(renderer->srgbCorrectionPass->GetOutputTexture());
             renderer->ffr->Initialize(fv);
             renderer->streamRenderTexture = renderer->ffr->GetOutputTexture()->GetGLTexture();
         } else {
-            renderer->srgbCorrectionPass->Initialize(width, height);
-            renderer->streamRenderTexture = renderer->srgbCorrectionPass->GetOutputTexture()->GetGLTexture();
+            renderer->srgbCorrectionPass->Initialize(width, height, !enableSrgbCorrection);
+            renderer->streamRenderTexture =
+                renderer->srgbCorrectionPass->GetOutputTexture()->GetGLTexture();
         }
     }
 
@@ -580,7 +589,8 @@ void ovrRenderer_Create(ovrRenderer *renderer,
 
     ovrProgram_Create(&renderer->streamProgram, VERTEX_SHADER, FRAGMENT_SHADER, STREAMER_PROG);
 
-    ovrProgram_Create(&renderer->lobbyProgram, LOBBY_VERTEX_SHADER, LOBBY_FRAGMENT_SHADER, LOBBY_PROG);
+    ovrProgram_Create(
+        &renderer->lobbyProgram, LOBBY_VERTEX_SHADER, LOBBY_FRAGMENT_SHADER, LOBBY_PROG);
 
     ovrGeometry_CreatePanel(&renderer->Panel);
     ovrGeometry_CreateVAO(&renderer->Panel);
@@ -734,7 +744,7 @@ void initGraphicsNative() {
     g_ctx.streamTexture = std::make_unique<Texture>(false, 0, true);
     g_ctx.hudTexture = std::make_unique<Texture>(
         false, 0, false, 1280, 720, GL_RGBA8, GL_RGBA, std::vector<uint8_t>(1280 * 720 * 4, 0));
-    
+
     const GLubyte *sVendor, *sRenderer, *sVersion, *sExts;
 
     GL(sVendor = glGetString(GL_VENDOR));
@@ -747,10 +757,14 @@ void initGraphicsNative() {
 }
 
 void destroyGraphicsNative() {
-    LOGV("Resetting stream texture and hud texture %p, %p", g_ctx.streamTexture.get(), g_ctx.hudTexture.get());
+    LOGV("Resetting stream texture and hud texture %p, %p",
+         g_ctx.streamTexture.get(),
+         g_ctx.hudTexture.get());
     g_ctx.streamTexture.reset();
     g_ctx.hudTexture.reset();
-    LOGV("Resetted stream texture and hud texture to %p, %p", g_ctx.streamTexture.get(), g_ctx.hudTexture.get());
+    LOGV("Resetted stream texture and hud texture to %p, %p",
+         g_ctx.streamTexture.get(),
+         g_ctx.hudTexture.get());
 }
 
 // on resume
@@ -774,7 +788,8 @@ void prepareLobbyRoom(int viewWidth,
                        g_ctx.hudTexture->GetGLTexture(),
                        g_ctx.lobbySwapchainTextures,
                        {false},
-                       true);
+                       true,
+                       false);
 }
 
 // on pause
@@ -819,7 +834,8 @@ void streamStartNative(FfiStreamConfig config) {
                         config.foveationCenterShiftY,
                         config.foveationEdgeRatioX,
                         config.foveationEdgeRatioY},
-                       false);
+                       false,
+                       config.enableSrgbCorrection);
 }
 
 void updateLobbyHudTexture(const unsigned char *data) {
@@ -838,14 +854,14 @@ void renderLobbyNative(const FfiViewInput eyeInputs[2]) {
         if (!g_ctx.hudTextureBitmap.empty()) {
             GL(glBindTexture(GL_TEXTURE_2D, g_ctx.hudTexture->GetGLTexture()));
             GL(glTexSubImage2D(GL_TEXTURE_2D,
-                            0,
-                            0,
-                            0,
-                            HUD_TEXTURE_WIDTH,
-                            HUD_TEXTURE_HEIGHT,
-                            GL_RGBA,
-                            GL_UNSIGNED_BYTE,
-                            &g_ctx.hudTextureBitmap[0]));
+                               0,
+                               0,
+                               0,
+                               HUD_TEXTURE_WIDTH,
+                               HUD_TEXTURE_HEIGHT,
+                               GL_RGBA,
+                               GL_UNSIGNED_BYTE,
+                               &g_ctx.hudTextureBitmap[0]));
         }
         g_ctx.hudTextureBitmap.clear();
     }

alvr/client_core/cpp/srgb_correction_pass.cpp

@@ -32,15 +32,29 @@ const string SRGB_CORRECTION_FRAGMENT_SHADER = R"glsl(#version 300 es
             color.rgb = condition * lowValues + (1.0 - condition) * highValues;
         }
     )glsl";
-}
+const string PASSTHOUGH_FRAGMENT_SHADER = R"glsl(#version 300 es
+        #extension GL_OES_EGL_image_external_essl3 : enable
+        precision mediump float;
+
+        uniform samplerExternalOES tex0;
+        in vec2 uv;
+        out vec4 color;
+
+        void main()
+        {
+            color = texture(tex0, uv);
+        }
+    )glsl";
+} // namespace
 
 SrgbCorrectionPass::SrgbCorrectionPass(Texture *inputSurface) : mInputSurface(inputSurface) {}
 
-void SrgbCorrectionPass::Initialize(uint32_t width, uint32_t height) {
+void SrgbCorrectionPass::Initialize(uint32_t width, uint32_t height, bool passthrough) {
     mOutputTexture.reset(new Texture(false, 0, false, width * 2, height));
     mOutputTextureState = make_unique<RenderState>(mOutputTexture.get());
 
-    auto fragmentShader = SRGB_CORRECTION_FRAGMENT_SHADER;
+    auto fragmentShader =
+        passthrough ? PASSTHOUGH_FRAGMENT_SHADER : SRGB_CORRECTION_FRAGMENT_SHADER;
     mStagingPipeline = unique_ptr<RenderPipeline>(
         new RenderPipeline({mInputSurface}, QUAD_2D_VERTEX_SHADER, fragmentShader));
 }

alvr/client_core/cpp/srgb_correction_pass.h

@@ -9,7 +9,7 @@ class SrgbCorrectionPass {
   public:
     SrgbCorrectionPass(gl_render_utils::Texture *inputSurface);
 
-    void Initialize(uint32_t width, uint32_t height);
+    void Initialize(uint32_t width, uint32_t height, bool passthrough);
 
     void Render() const;
 

alvr/client_core/src/c_api.rs

@@ -535,7 +535,12 @@ pub unsafe extern "C" fn alvr_start_stream_opengl(config: AlvrStreamConfig) {
         edge_ratio_y: config.foveation_edge_ratio_y,
     });
 
-    opengl::start_stream(view_resolution, swapchain_textures, foveated_rendering);
+    opengl::start_stream(
+        view_resolution,
+        swapchain_textures,
+        foveated_rendering,
+        true,
+    );
 }
 
 #[no_mangle]

alvr/client_core/src/opengl.rs

@@ -71,6 +71,7 @@ pub fn start_stream(
     view_resolution: UVec2,
     swapchain_textures: [Vec<u32>; 2],
     foveated_rendering: Option<FoveatedRenderingConfig>,
+    enable_srgb_correction: bool,
 ) {
     #[cfg(target_os = "android")]
     unsafe {
@@ -107,6 +108,7 @@ pub fn start_stream(
                 .as_ref()
                 .map(|f| f.edge_ratio_y)
                 .unwrap_or_default(),
+            enableSrgbCorrection: enable_srgb_correction as u32,
         };
 
         streamStartNative(config);

alvr/client_openxr/Cargo.toml

@@ -155,4 +155,12 @@ value = "1"
 # Yvr entries
 [[package.metadata.android.application.meta_data]]
 name = "com.yvr.intent.category.VR"
-value = "vr_only"
+value = "vr_only"
+
+# Lynx entries
+[[package.metadata.android.queries.intent]]
+actions = ["org.khronos.openxr.OpenXRRuntimeService"]
+[[package.metadata.android.queries.package]]
+name = "com.ultraleap.tracking.service"
+[[package.metadata.android.queries.package]]
+name = "com.ultraleap.openxr.api_layer"

alvr/client_openxr/src/interaction.rs

@@ -45,7 +45,7 @@ pub fn initialize_hands_interaction(
         Platform::Pico4 => PICO4_CONTROLLER_PROFILE_PATH,
         Platform::Focus3 => FOCUS3_CONTROLLER_PROFILE_PATH,
         Platform::Yvr => YVR_CONTROLLER_PROFILE_PATH,
-        Platform::Other => QUEST_CONTROLLER_PROFILE_PATH,
+        _ => QUEST_CONTROLLER_PROFILE_PATH,
     };
     let interaction_profile_id = alvr_common::hash_string(interaction_profile_path);
 

alvr/client_openxr/src/lib.rs

@@ -35,6 +35,7 @@ pub enum Platform {
     Pico4,
     Focus3,
     Yvr,
+    Lynx,
     Other,
 }
 
@@ -350,29 +351,30 @@ fn update_streaming_input(ctx: &mut StreamingInputContext) {
 pub fn entry_point() {
     alvr_client_core::init_logging();
 
-    let platform = match (
-        alvr_client_core::manufacturer_name().as_str(),
-        alvr_client_core::device_model().as_str(),
-    ) {
+    let manufacturer_name = alvr_client_core::manufacturer_name();
+    let device_model = alvr_client_core::device_model();
+
+    info!("Manufacturer: {manufacturer_name}, device model: {device_model}");
+
+    let platform = match (manufacturer_name.as_str(), device_model.as_str()) {
         ("Oculus", _) => Platform::Quest,
         ("Pico", "Pico Neo 3") => Platform::PicoNeo3,
         ("Pico", _) => Platform::Pico4,
         ("HTC", _) => Platform::Focus3,
         ("YVR", _) => Platform::Yvr,
+        ("Lynx Mixed Reality", _) => Platform::Lynx,
         _ => Platform::Other,
     };
 
-    let xr_entry = match platform {
-        Platform::Quest => unsafe {
-            xr::Entry::load_from(Path::new("libopenxr_loader_quest.so")).unwrap()
-        },
-        Platform::PicoNeo3 | Platform::Pico4 => unsafe {
-            xr::Entry::load_from(Path::new("libopenxr_loader_pico.so")).unwrap()
-        },
-        Platform::Yvr => unsafe {
-            xr::Entry::load_from(Path::new("libopenxr_loader_yvr.so")).unwrap()
-        },
-        _ => unsafe { xr::Entry::load().unwrap() },
+    let loader_suffix = match platform {
+        Platform::Quest => "quest",
+        Platform::PicoNeo3 | Platform::Pico4 => "pico",
+        Platform::Yvr => "yvr",
+        Platform::Lynx => "lynx",
+        _ => "generic",
+    };
+    let xr_entry = unsafe {
+        xr::Entry::load_from(Path::new(&format!("libopenxr_loader_{loader_suffix}.so"))).unwrap()
     };
 
     #[cfg(target_os = "android")]
@@ -784,6 +786,7 @@ pub fn entry_point() {
                                     .collect(),
                             ],
                             settings.video.foveated_rendering.into_option(),
+                            platform != Platform::Lynx,
                         );
 
                         alvr_client_core::send_playspace(

alvr/xtask/src/command.rs

@@ -21,19 +21,16 @@ pub fn download(sh: &Shell, url: &str, destination: &Path) -> Result<(), xshell:
     cmd!(sh, "curl -L -o {destination} --url {url}").run()
 }
 
-pub fn download_and_extract_zip(
-    sh: &Shell,
-    url: &str,
-    destination: &Path,
-) -> Result<(), xshell::Error> {
+pub fn download_and_extract_zip(url: &str, destination: &Path) -> Result<(), xshell::Error> {
+    let sh = Shell::new().unwrap();
     let temp_dir_guard = sh.create_temp_dir()?;
 
     let zip_file = temp_dir_guard.path().join("temp_download.zip");
-    download(sh, url, &zip_file)?;
+    download(&sh, url, &zip_file)?;
 
     sh.remove_path(destination).ok();
     sh.create_dir(destination)?;
-    unzip(sh, &zip_file, destination)
+    unzip(&sh, &zip_file, destination)
 }
 
 pub fn date_utc_yyyymmdd(sh: &Shell) -> Result<String, xshell::Error> {