Rendertarget does not reflect latest spritebatch draw

[bitkidinc]

When saving screenshots in my editor, I create a new RenderTarget2D, draw the scene to it with spritebatch, then save the renderTarget to disk. With SDL 3.0 it started being a state behind so to speak, meaning that when it draws the scene, its how it looked before I made the changes. I have to save twice to get it to correctly draw now. Changing graphics driver to D3D11 fixes the problem.

[AlexQ3D]

I also ran into this problem, here's a gist with a minimal repro example if it's useful

[flibitijibibo]

A few more people have run into this, so just as a starting point for anyone willing to dig into FNA3D: This is likely the result of timing issues with the copy pass and render pass; my guess is forcing a command flush and pipeline stall at the top of GetTextureData2D will "fix" it with a significant performance cost. We may need to forcibly end the render pass and flush commands so that we can start a copy pass that's submitted after rendering has occurred.

[flibitijibibo]

I think we need to do this but with render commands above the Download call: https://github.com/FNA-XNA/FNA3D/blob/master/src/FNA3D_Driver_SDL.c#L3513

[flibitijibibo]

Once CI is finished the artifacts at #243 may resolve this issue.

[bitkidinc]

Once CI is finished the artifacts at #243 may resolve this issue.

Awesome, thanks! That seems to have fixed it on my end. Will report back if there's any further issue.