OnRenderImage() onBeforeRender() order

[orangeagain]

I want to get camera render position and ar position. Theoretically these two values are equal.

But I don't know why OnRenderImage() was called before onBeforeRender() in same frame count. Here is call order by frameCount:

OnRenderImage():197 OnBeforeRender():197 OnCameraFrameReceived():198 OnRenderImage():198

OnRenderImage():209 OnBeforeRender():209 OnCameraFrameReceived():210 OnRenderImage():210

[tdmowrer]

On what platform? On Android, I consistently get this ordering (which is what I would expect):

OnARCameraFrameReceived
Update
OnBeforeRender
OnRenderImage

In the Editor, I get the same ordering of OnBeforeRender and OnRenderImage.

This is my test script:

using UnityEngine;
using UnityEngine.XR.ARFoundation;

[RequireComponent(typeof(Camera))]
[RequireComponent(typeof(ARCameraManager))]
public class EventOrdering : MonoBehaviour
{
    void Start()
    {
        Application.onBeforeRender += OnBeforeRender;
        GetComponent<ARCameraManager>().frameReceived += OnARCameraFrameReceived;
    }

    void Update() => Debug.Log($"{Time.frameCount}: {nameof(Update)}");
    void OnRenderImage(RenderTexture a, RenderTexture b) => Debug.Log($"{Time.frameCount}: {nameof(OnRenderImage)}");
    void OnBeforeRender() => Debug.Log($"{Time.frameCount}: {nameof(OnBeforeRender)}");
    void OnARCameraFrameReceived(ARCameraFrameEventArgs _) => Debug.Log($"{Time.frameCount}: {nameof(OnARCameraFrameReceived)}");
}

[orangeagain]

On what platform? On Android, I consistently get this ordering (which is what I would expect):

OnARCameraFrameReceived
Update
OnBeforeRender
OnRenderImage

In the Editor, I get the same ordering of OnBeforeRender and OnRenderImage.

This is my test script:

using UnityEngine;
using UnityEngine.XR.ARFoundation;

[RequireComponent(typeof(Camera))]
[RequireComponent(typeof(ARCameraManager))]
public class EventOrdering : MonoBehaviour
{
    void Start()
    {
        Application.onBeforeRender += OnBeforeRender;
        GetComponent<ARCameraManager>().frameReceived += OnARCameraFrameReceived;
    }

    void Update() => Debug.Log($"{Time.frameCount}: {nameof(Update)}");
    void OnRenderImage(RenderTexture a, RenderTexture b) => Debug.Log($"{Time.frameCount}: {nameof(OnRenderImage)}");
    void OnBeforeRender() => Debug.Log($"{Time.frameCount}: {nameof(OnBeforeRender)}");
    void OnARCameraFrameReceived(ARCameraFrameEventArgs _) => Debug.Log($"{Time.frameCount}: {nameof(OnARCameraFrameReceived)}");
}

I test in editor.order was uncorrect. On ios build,order was correct.