From 42f33c1b0ec543eba3e564d7f96498648e283fff Mon Sep 17 00:00:00 2001
From: Phireh <phireh@fukurokuju.dev>
Date: Mon, 18 Nov 2024 16:06:15 +0100
Subject: [PATCH] Set EGL swap interval to 0

---
 wayland.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/wayland.c b/wayland.c
index 8133c47..6e8c4ec 100644
--- a/wayland.c
+++ b/wayland.c
@@ -251,11 +251,19 @@ int main()
     wl_region_add(region, 0, 0, 480, 360);
     wl_surface_set_opaque_region(surface, region);
 
+    /* NOTE: It would seem that having a non-zero swap interval can hang the Mesa driver forever, according to this SDL GH issue:
+       https://github.com/libsdl-org/SDL/issues/4335#issuecomment-829789881
+     */
+    if (eglSwapInterval(egl_display, 0) != EGL_TRUE)
+      fprintf(stderr, "Could not set EGL swap interval\n");
+
+    int framecount = 0;
+    
     // Main event loop
     while (1)
     {
         wl_display_dispatch_pending(display);
-        fprintf(stdout, "Dispatching event...\n");
+        fprintf(stdout, "Frame %d\n", framecount++);
         glClearColor(0.5, 0.3, 0.0, 1.0);
         glClear(GL_COLOR_BUFFER_BIT);
         glFlush();