v2: Better version which creates per-drawable DCs instead and fixes missing offscreen drawable resize. Fwiw this fixes GL display when DPI scaling is used, and will also work for display mode virtualization, which I also intend to implement with DPI, similarly to how Windows now implements it. I understand that using a display DC blit isn't great but it allows us to use XRender and to perform not too badly. Ideally this would be using some composition mechanism, but this will require a lot more work and could hopefully later replace it. It's also not clear whether a compositor is doable in every case, as for instance it will require being able to export/import surfaces as DMA buffers, which simply may not be possible with remote X sessions. -- https://gitlab.winehq.org/wine/wine/-/merge_requests/6398#note_81606