client-side DIB copy?

[Damjan Jovanovic]

Hi

I'm trying to implement the "client-side DIB copy optimization"
mentioned in dlls/winex11.drv/bitblt.c, but I'm having trouble. The
patch (against wine-0.9.22) is attached.

The one app I know that uses it, Heroes of might and magic 4, runs
much faster with the patch, but the graphics come out wrong: mouse
droppings, black blocks, pictures drawn in wrong places (over panels)
etc.

Is there something else I am supposed to be doing, like holding some
lock, or doing something after I copy the pixels?

I'd really appreciate any help.

Damjan