Method SubmitLayer

Revive/CompositorBase.cpp:369–452

}

vr::VRCompositorError CompositorBase::SubmitLayer(ovrSession session, const ovrLayerHeader* baseLayer, const ovrViewScaleDesc* viewScaleDesc)
{
	MICROPROFILE_SCOPE(SubmitLayer);

	const ovrLayer_Union& layer = ToUnion(baseLayer);

	// Submit the scene layer.
	vr::VRCompositorError err;
	vr::Texture_t depthTexture;
	vr::Texture_t colorTexture;
	ovrTextureSwapChain colorChain = nullptr;
	ovrTextureSwapChain depthChain = nullptr;
	for (int i = 0; i < ovrEye_Count; i++)
	{
		if (layer.EyeFov.ColorTexture[i] && layer.EyeFov.ColorTexture[i] != colorChain)
		{
			colorChain = layer.EyeFov.ColorTexture[i];
			colorChain->Submit()->ToVRTexture(colorTexture);
		}

		ovrFovPort fov = baseLayer->Type == ovrLayerType_EyeMatrix ?
			REV::Matrix4f(layer.EyeMatrix.Matrix[i]).ToFovPort() : layer.EyeFov.Fov[i];

		vr::VRTextureBounds_t bounds = ViewportToTextureBounds(layer.EyeFov.Viewport[i], colorChain, baseLayer->Flags);

		// Get the descriptor for this eye
		const ovrEyeRenderDesc& desc = session->RenderDesc[i];

		// Shrink the bounds to account for the overlapping fov
		vr::VRTextureBounds_t fovBounds = FovPortToTextureBounds(desc.Fov, fov);

		// Combine the fov bounds with the viewport bounds
		bounds.uMin += fovBounds.uMin * (bounds.uMax - bounds.uMin);
		bounds.uMax = bounds.uMin + fovBounds.uMax * (bounds.uMax - bounds.uMin);
		bounds.vMin += fovBounds.vMin * (bounds.vMax - bounds.vMin);
		bounds.vMax = bounds.vMin + fovBounds.vMax * (bounds.vMax - bounds.vMin);

		unsigned int submitFlags = vr::Submit_Default;
		union
		{
			vr::Texture_t Color;
			vr::VRTextureWithPose_t Pose;
			vr::VRTextureWithDepth_t Depth;
			vr::VRTextureWithPoseAndDepth_t PoseDepth;
		} texture;
		texture.Color = colorTexture;

		// Add the pose data to the eye texture
		OVR::Matrix4f hmdToEye(viewScaleDesc ? viewScaleDesc->HmdToEyePose[i] : desc.HmdToEyePose);
		OVR::Matrix4f pose(baseLayer->Type == ovrLayerType_EyeMatrix ?
			layer.EyeMatrix.RenderPose[i] : layer.EyeFov.RenderPose[i]);
		texture.Pose.mDeviceToAbsoluteTracking = REV::Matrix4f(pose * hmdToEye.Inverted());
		submitFlags |= vr::Submit_TextureWithPose;

		// Add the depth data if present in the layer
		if (baseLayer->Type == ovrLayerType_EyeFovDepth)
		{
			if (layer.EyeFovDepth.DepthTexture[i] && layer.EyeFovDepth.DepthTexture[i] != depthChain)