private void Update()
{
if (Time.frameCount == prevFrameCount)
{
return;
}
prevFrameCount = Time.frameCount;
if (videostream.handle == 0)
{
return;
}
var vr = SteamVR.instance;
if (vr == null)
{
return;
}
var trackedCamera = OpenVR.TrackedCamera;
if (trackedCamera == null)
{
return;
}
var nativeTex = IntPtr.Zero;
var deviceTexture = (_texture != null) ? _texture : new Texture2D(2, 2);
var headerSize = (uint)Marshal.SizeOf(header.GetType());
if (vr.textureType == ETextureType.OpenGL)
{
if (glTextureId != 0)
{
trackedCamera.ReleaseVideoStreamTextureGL(videostream.handle, glTextureId);
}
if (
trackedCamera.GetVideoStreamTextureGL(videostream.handle, frameType, ref glTextureId, ref header, headerSize) !=
EVRTrackedCameraError.None)
{
return;
}
nativeTex = (IntPtr)glTextureId;
}
else if (vr.textureType == ETextureType.DirectX)
{
if (
trackedCamera.GetVideoStreamTextureD3D11(videostream.handle, frameType, deviceTexture.GetNativeTexturePtr(),
ref nativeTex, ref header, headerSize) != EVRTrackedCameraError.None)
{
return;
}
}
if (_texture == null)
{
_texture = Texture2D.CreateExternalTexture((int)header.nWidth, (int)header.nHeight, TextureFormat.RGBA32,
false, false, nativeTex);
uint width = 0, height = 0;
var frameBounds = new VRTextureBounds_t();
if (trackedCamera.GetVideoStreamTextureSize(deviceIndex, frameType, ref frameBounds, ref width, ref height) ==
EVRTrackedCameraError.None)
{
// Account for textures being upside-down in Unity.
frameBounds.vMin = 1.0f - frameBounds.vMin;
frameBounds.vMax = 1.0f - frameBounds.vMax;
this.frameBounds = frameBounds;
}
}
else
{
_texture.UpdateExternalTexture(nativeTex);
}
}
