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Question Copying a screenshot onto a quad in an ISystem

Discussion in 'General Graphics' started by xindexer2, Aug 2, 2023.

  1. xindexer2


    Nov 30, 2013
    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
  2. xindexer2


    Nov 30, 2013
    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);