On Tue, 30 Dec 2025 at 23:53:58 +0000, Simon McVittie wrote:
On Tue, 30 Dec 2025 at 19:51:36 +0000, Simon McVittie wrote:
Actual result with Wayland: A black window. If I press Escape, I get
what appears to be the expected window on every 2nd frame, and a black
screen on the remaining frames.
This seems to be the same thing that was reported upstream as
<https://gitlab.com/domino-chain/domino-chain.gitlab.io/-/issues/20>.
See also <https://github.com/libsdl-org/sdl2-compat/issues/569>
looking at this from the SDL side.
According to SDL upstream, this is a game bug in domino-chain: it's
assuming that the backbuffer contents from each frame are preserved
after the frame is presented, but this is undefined behaviour in OpenGL
and Vulkan: with some platform/driver combinations it happens, but with
some it does not.
SDL's rendering API never guaranteed this either, but in practice it
usually worked in the past. Newer versions of sdl2-compat will work
around this by forcing use of SDL's software renderer for domino-chain,
which does have the backbuffer-preserving behaviour.
Reference:
https://github.com/libsdl-org/sdl2-compat/commit/61789ee297b0dd0fae298fb4fd8c86afff933c08
smcv
