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wayland: Throttle to 20hz if the frame callback never fires 

Matches SDL2, and should be enough to keep most games from desyncing/timing out.

A proper fix for FIFO presentation without the frame callback mess is being worked on upstream, so this whole hack should be rendered obsolete in the near future.
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Frank Praznik 2024-01-30 17:12:20 -05:00
parent 4a759b340f
commit 482a27bc00
1 changed files with 2 additions and 2 deletions
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4
src/video/wayland/SDL_waylandopengles.c
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@ -124,8 +124,8 @@ int Wayland_GLES_SwapWindow(SDL_VideoDevice *_this, SDL_Window *window)
if (swap_interval != 0 && data->surface_status == WAYLAND_SURFACE_STATUS_SHOWN) { if (swap_interval != 0 && data->surface_status == WAYLAND_SURFACE_STATUS_SHOWN) {
SDL_VideoData *videodata = _this->driverdata; SDL_VideoData *videodata = _this->driverdata;
struct wl_display *display = videodata->display; struct wl_display *display = videodata->display;
/* 1 sec, so we'll progress even if throttled to zero. */ /* 20hz, so we'll progress even if throttled to zero. */
const Uint64 max_wait = SDL_GetTicksNS() + SDL_NS_PER_SECOND; const Uint64 max_wait = SDL_GetTicksNS() + (SDL_NS_PER_SECOND / 20);
while (SDL_AtomicGet(&data->swap_interval_ready) == 0) { while (SDL_AtomicGet(&data->swap_interval_ready) == 0) {
Uint64 now; Uint64 now;