Question Copying a screenshot onto a quad in an ISystem

I need to copy a screenshot onto a quad and I’d prefer to do it all in an ISystem (or SystemBase) if able.

I have a version that works in mono using screenCapture.capturescreenshotastexture, however I have read and I’m seeing that it sometimes doesn’t work.

ideally I’d like to do it all on the GPU.

How do i get the screen as my source And how do I assign the texture to the quad?

Thank you

 

I have been working on this one for a while - finally got something that works, if somebody comes across this in the future here's what I did:

Code (CSharp):

1. var quad = EntityManager.Instantiate(SystemAPI.GetSingleton<Config>().QuadPrefab);
2. var hybridRenderer = World.GetExistingSystemManaged<EntitiesGraphicsSystem>();
3. var screenShotMaterial = new Material(Shader.Find("HDRP/Unlit"));
4. screenShotMaterial.mainTexture = UnityEngine.ScreenCapture.CaptureScreenshotAsTexture();
5. var materialID = hybridRenderer.RegisterMaterial(screenShotMaterial);
6. var mmi = EntityManager.GetComponentData<MaterialMeshInfo>(quad);
7. mmi.MaterialID = materialID;
8. var quadRma = EntityManager.GetSharedComponentManaged<RenderMeshArray>(quad);
9. var rmaMatList = quadRma.Materials.ToList();
10. rmaMatList.Add(screenShotMaterial);
11. var rma = new RenderMeshArray(rmaMatList.ToArray(), quadRma.Meshes);
12. var rmd = new RenderMeshDescription(UnityEngine.Rendering.ShadowCastingMode.Off, false);
13. RenderMeshUtility.AddComponents(quad, EntityManager, rmd, rma, mmi);