Possible to get the capture texture from the framepool on init? about windows.ui.composition-win32-samples HOT 2 CLOSED

Keep in mind that the frame pool represents shared textures between your application and the DWM. We don't allow applications indiscriminate access to the underlying textures because we wouldn't be able to guarantee that they aren't currently being drawn to by the compositor. This is also why you should never cache the texture we provide. However, as long as you are holding onto the Direct3D11CaptureFrame object, the texture is yours. When you're done with it, call Close/Dispose (for C++/C# respectively) to return the frame back to the frame pool. Although I'm not familiar with OpenGL/DirectX interop, so I can't advice if it's safe to create interop handles for each frame pool texture.

Unfortunately, I think you won't be able to avoid the copy here. I would create one interop texture that matches the dimensions of the frame pool's textures and copy frames into that texture when frames arrive. Then you can turn around and draw the contents of the interop texture using OpenGL.

from windows.ui.composition-win32-samples.

Thank you for taking the time to answer, Robert.

I agree that it's best not to expose the underlying textures outside of the controlled way it's being done now with TryGetNextFrame, most times than not it would probably cause issues. I guess my issue lies more with the interop. Technically I think that it should work if I create the interop on the frame pool textures and ensure that they are not being modified outside of the newFrameCallback, but only if A) The underlying textures are created with flags that are supported, B) the ID3D11Texture2D object returned by getFrame stays the same in memory so that it will always be the same I get from the frame.

I suspect that it's A) that fails here. I suppose I'll leave it as it is, the CopyResource function doesn't move it to the CPU in the end so the overhead is not that bad I suppose, the bottleneck lies somewhere else.

Thank you!

from windows.ui.composition-win32-samples.