From: Benjamin Otte <otte@redhat.com>
Date: Fri, 28 Apr 2023 20:40:39 +0000 (+0200)
Subject: wayland: Set EGL swap interval to 0.
X-Git-Tag: archive/raspbian/4.12.3+ds-1+rpi1~1^2^2^2~22^2~1^2~342^2~2
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=b4c859c0113f8802d9c6f047dcf2b689223848da;p=gtk4.git

wayland: Set EGL swap interval to 0.

There's no need for EGL to do any timing, we do it in GTK already.

This fixes hangs in Mesa when we hide a surface after a SwapBuffers()
but before the frame callback arrives.
If we then reshow the surface and immediately render to it, Mesa would
still have a frame callback from before the hiding and forever poll()
waiting for the compositor to send the callback.

Fixes #5761
---

diff --git a/gdk/wayland/gdkglcontext-wayland.c b/gdk/wayland/gdkglcontext-wayland.c
index b0ae79a0b7..b236854ba9 100644
--- a/gdk/wayland/gdkglcontext-wayland.c
+++ b/gdk/wayland/gdkglcontext-wayland.c
@@ -75,6 +75,9 @@ gdk_wayland_gl_context_end_frame (GdkDrawContext *draw_context,
       WL_SURFACE_OFFSET_SINCE_VERSION)
     wl_surface_offset (impl->display_server.wl_surface, dx, dy);
 
+  /* We should do ths when setting up the EGLSurface, but we don't make_current then */
+  eglSwapInterval (gdk_display_get_egl_display (gdk_draw_context_get_display (draw_context)), 0);
+
   GDK_DRAW_CONTEXT_CLASS (gdk_wayland_gl_context_parent_class)->end_frame (draw_context, painted);
 
   gdk_wayland_surface_notify_committed (surface);