Track the buffer regions that require an update since the last buffer
commit, and copy only those parts from the window_surface to the buffer.

Create a buffer queue to hold the SHM buffers for each window_surface,
to be able to reuse released buffers instead of constantly creating new
ones.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53831Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Signed-off-by: Bernhard Kölbl <besentv@gmail.com>

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55114

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55124

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47089Signed-off-by: Fabian Maurer <dark.shadow4@web.de>

Signed-off-by: Bernhard Kölbl <bkoelbl@codeweavers.com>

And synchronize with thread display when necessary.

Resolves a scan-build warning.

Introduced in 36963b6d.

To reduce the number of casts required and avoid a scan-build warning.