From 0a98f9c69a5659b5a8f523c2f6d2a5eca37973ec Mon Sep 17 00:00:00 2001
From: toaster <rollerorbital@gmail.com>
Date: Wed, 26 Oct 2022 20:45:41 +0100
Subject: [PATCH] SDL: Support setting vsync at runtime
Allows vid_wait to work under software without having to switch to OpenGL and then back
---
src/sdl/i_video.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/src/sdl/i_video.c b/src/sdl/i_video.c
index 05cb385e9..f0a8a7194 100644
--- a/src/sdl/i_video.c
+++ b/src/sdl/i_video.c
@@ -102,7 +102,7 @@ rendermode_t rendermode = render_none;
boolean highcolor = false;
// synchronize page flipping with screen refresh
-consvar_t cv_vidwait = {"vid_wait", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
+consvar_t cv_vidwait = {"vid_wait", "Off", CV_SAVE|CV_CALL|CV_NOINIT, CV_OnOff, Impl_SetVsync, 0, NULL, NULL, 0, 0, NULL};
static consvar_t cv_stretch = {"stretch", "Off", CV_SAVE|CV_NOSHOWHELP, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
UINT8 graphics_started = 0; // Is used in console.c and screen.c
@@ -2131,4 +2131,9 @@ UINT32 I_GetRefreshRate(void)
return refresh_rate;
}
+static void Impl_SetVsync(void)
+{
+#if SDL_VERSION_ATLEAST(2,0,18)
+ if (renderer)
+ SDL_RenderSetVSync(renderer, cv_vidwait.value);
#endif
--
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