From d78072fcd46943288a6007cd6f4ab1f98f446b1d Mon Sep 17 00:00:00 2001
From: Ivan Mogilko <[EMAIL REDACTED]>
Date: Sat, 18 Mar 2023 00:39:02 +0300
Subject: [PATCH] Fixed SDL_RenderSetVSync does not update flags if simulated
vsync is on
This lets the user to correctly detect current vsync state by reading SDL_RendererInfo.
Also fixes SetVSync's return value check (it may be positive for error too).
---
src/render/SDL_render.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
index 2df36c69a305..422e37a9b390 100644
--- a/src/render/SDL_render.c
+++ b/src/render/SDL_render.c
@@ -4510,8 +4510,13 @@ int SDL_RenderSetVSync(SDL_Renderer *renderer, int vsync)
renderer->wanted_vsync = vsync ? SDL_TRUE : SDL_FALSE;
if (!renderer->SetVSync ||
- renderer->SetVSync(renderer, vsync) < 0) {
+ renderer->SetVSync(renderer, vsync) != 0) {
renderer->simulate_vsync = vsync ? SDL_TRUE : SDL_FALSE;
+ if (renderer->simulate_vsync) {
+ renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
+ } else {
+ renderer->info.flags &= ~SDL_RENDERER_PRESENTVSYNC;
+ }
} else {
renderer->simulate_vsync = SDL_FALSE;
}