From c4b98587387390658838beeac04559701f7f6df7 Mon Sep 17 00:00:00 2001
From: Gary Talent <gary@drinkingtea.net>
Date: Thu, 18 Mar 2021 02:02:40 -0500
Subject: [PATCH] [nostalgia/core/sdl] Make attempt to use adaptive vsync and
 fall back on vsync

---
 src/nostalgia/core/sdl/core.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/nostalgia/core/sdl/core.cpp b/src/nostalgia/core/sdl/core.cpp
index 465c4a72a..42273cba4 100644
--- a/src/nostalgia/core/sdl/core.cpp
+++ b/src/nostalgia/core/sdl/core.cpp
@@ -28,7 +28,10 @@ ox::Error init(Context *ctx) {
 
 ox::Error run(Context *ctx) {
 	auto id = ctx->windowerData<SdlImplData>();
-	SDL_GL_SetSwapInterval(1);
+	// try adaptive vsync
+	if (SDL_GL_SetSwapInterval(-1) < 0) {
+		SDL_GL_SetSwapInterval(1); // fallback on normal vsync
+	}
 	for (auto running = true; running;) {
 		SDL_Event event;
 		while (SDL_PollEvent(&event)) {