From 80fae1058ffedc5e2ab03abf8de710eaf1e7ecda Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@slint.dev>
Date: Wed, 20 Sep 2023 11:03:39 +0200
Subject: [PATCH] Default to vsync for OpenGL rendering

Fixes #3516

(cherry picked from commit fd123b27bdb9a1a263499524bfceb8fe41e40de9)
---
 internal/backends/winit/renderer/femtovg/glcontext.rs | 8 ++++++++
 internal/renderers/skia/opengl_surface.rs             | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/internal/backends/winit/renderer/femtovg/glcontext.rs b/internal/backends/winit/renderer/femtovg/glcontext.rs
index 795424ad46..5bb8f1972a 100644
--- a/internal/backends/winit/renderer/femtovg/glcontext.rs
+++ b/internal/backends/winit/renderer/femtovg/glcontext.rs
@@ -179,6 +179,14 @@ impl OpenGLContext {
             );
         }
 
+        // Try to default to vsync and ignore if the driver doesn't support it.
+        surface
+            .set_swap_interval(
+                &context,
+                glutin::surface::SwapInterval::Wait(NonZeroU32::new(1).unwrap()),
+            )
+            .ok();
+
         Ok((window, Self { context, surface }))
     }
 }
diff --git a/internal/renderers/skia/opengl_surface.rs b/internal/renderers/skia/opengl_surface.rs
index fb9584fbaa..ed31202765 100644
--- a/internal/renderers/skia/opengl_surface.rs
+++ b/internal/renderers/skia/opengl_surface.rs
@@ -340,6 +340,14 @@ impl OpenGLSurface {
             .into());
         }
 
+        // Try to default to vsync and ignore if the driver doesn't support it.
+        surface
+            .set_swap_interval(
+                &context,
+                glutin::surface::SwapInterval::Wait(NonZeroU32::new(1).unwrap()),
+            )
+            .ok();
+
         Ok((context, surface))
     }