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#define VRB_LOG(format, ...) __android_log_print(ANDROID_LOG_INFO, "VRB", format, ##__VA_ARGS__);

static already_AddRefed<SharedSurfaceTextureClient>
CloneSurface(gl::SharedSurface* src, gl::SurfaceFactory* factory)
{
    RefPtr<SharedSurfaceTextureClient> dest = factory->NewTexClient(src->mSize);
    if (!dest) {
      return nullptr;
    }

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// Android SurfaceView initialization example
void init(final Activity activity) {
  mSurfaceView = new SurfaceView(activity);
  mSurfaceView.getHolder().addCallback(OVRService.this);
  // Enabling setZOrderOnTop is very important! If not enabled a single swap_buffers
  // on the NativeActivity's window will make the SurfaceView invisible.
  mSurfaceView.setZOrderOnTop(true);
  activity.getApplication().registerActivityLifecycleCallbacks(OVRService.this);
}

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fn submit_frame(&mut self, layer: &VRLayer) {
    let mut frame_params = ovr::helpers::vrapi_DefaultFrameParms(self.render_ovr_java.handle(),
                                                                 ovr::ovrFrameInit::VRAPI_FRAME_INIT_DEFAULT,
                                                                 self.predicted_display_time,
                                                                 ptr::null_mut());
    frame_params.FrameIndex = self.frame_index;

    let eye_projection = self.eye_projection.get();
    for (i, eye) in self.eye_framebuffers.iter_mut().enumerate() {
        let swap_chain_index = (self.frame_index % eye.swap_chain_length as i64) as i32;

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--------- beginning of system
07-03 16:58:41.761   447   455 I QISL    : QSEE Interrupt Service Listener Thread is started
07-03 16:58:41.762   447   455 I QISL    : QSEE Interrupt Service Listener was activated successfully
07-03 16:58:43.880   545   545 I vold    : Vold 3.0 (the awakening) firing up
07-03 16:58:43.888   545   545 V vold    : Detected support for: ext4 vfat
07-03 16:58:43.942   545   552 I vold    : e4crypt_initialize_global_de
07-03 16:58:44.149   545   552 D vold    : Added key 353542628 (ext4:5a0dc95cb48db9de) to keyring 936389460 in process 545
07-03 16:58:44.204   545   552 D vold    : e4crypt_init_user0
07-03 16:58:44.204   545   552 D vold    : Preparing: /data/misc/vold/user_keys
07-03 16:58:44.205   545   552 D vold    : Preparing: /data/misc/vold/user_keys/ce

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pub trait VRGamepad {
   fn id(&self) -> u32;
   // Constant data for the gamepad.
   fn data(&self) -> VRGamepadData;
   // Data that should be polled every frame.
   fn state(&self) -> VRGamepadState;
}

pub struct VRGamepadState {
    pub connected: bool,

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if self.fbo_texture != layer.texture_id {
    // Attach external texture to the used later in BlitFramebuffer.
    gl::BindFramebuffer(gl::FRAMEBUFFER, self.fbo_id);
    gl::FramebufferTexture2D(gl::FRAMEBUFFER, gl::COLOR_ATTACHMENT0, gl::TEXTURE_2D, layer.texture_id,    0);
    self.fbo_texture = layer.texture_id;
}

let texture_size = layer.texture_size.unwrap_or_else(|| {
    (self.render_size.width as u32, self.render_size.height as u32)
});

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public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().takeSurface(null);
    FrameLayout layout = new FrameLayout(this);
    layout.setLayoutParams(new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
                                                        FrameLayout.LayoutParams.MATCH_PARENT));
    SurfaceView nativeSurface = new SurfaceView(this);
    nativeSurface.getHolder().addCallback(this);
    layout.addView(nativeSurface, new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
                                                               FrameLayout.LayoutParams.MATCH_PARENT));

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/// Creates a typed JS array from a Rust slice
pub fn slice_to_array_buffer_view<T>(cx: *mut JSContext, data: &[T]) -> *mut JSObject 
    where T: ArrayBufferViewContents
{
    unsafe {
        let js_object = T::new(cx, data.len() as u32);
        assert!(!js_object.is_null());
        update_array_buffer_view(js_object, data);
        js_object
    }

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#[dom_struct]
pub struct VRDisplay {
    eventtarget: EventTarget,
    #[ignore_heap_size_of = "Defined in rust-webvr"]
    display: DOMRefCell<WebVRDisplayData>,
    depth_near: Cell<f64>,
    depth_far: Cell<f64>,
    presenting: Cell<bool>,
    left_eye_params: MutHeap<JS<VREyeParameters>>,
    right_eye_params: MutHeap<JS<VREyeParameters>>,

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pub enum VRCompositorCommand {  
    Create(VRCompositorId),
    SyncPoses(VRCompositorId, f64, f64, IpcSender<Result<Vec<u8>,()>>),
    SubmitFrame(VRCompositorId, [f32; 4], [f32; 4]),
    Release(VRCompositorId)
}