From a4c0df1b591c5b28ef855b25006a3ff3e1bee4d9 Mon Sep 17 00:00:00 2001
From: Gert-dev <Gert-dev@anonymous.com>
Date: Wed, 2 Oct 2024 17:39:32 +0200
Subject: [PATCH] egl: Add helpers to manage and wait for EGLSync objects

This adds meta_egl_create_sync and meta_egl_destroy_sync to be able to
create and dispose EGLSync objects, respectively, as well as
meta_egl_wait_sync to be able to wait for an EGLSync on the GPU.

(cherry picked from commit d2e70c15ec1cf6b6f7cd8c8825a5d92a1f89b35b)
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4015>
Signed-off-by: Mingi Sung <sungmg@saltyming.net>
---
 src/backends/meta-egl.c | 71 +++++++++++++++++++++++++++++++++++++++++
 src/backends/meta-egl.h | 18 +++++++++++
 2 files changed, 89 insertions(+)

diff --git a/src/backends/meta-egl.c b/src/backends/meta-egl.c
index cc023f705..50da9c464 100644
--- a/src/backends/meta-egl.c
+++ b/src/backends/meta-egl.c
@@ -44,6 +44,10 @@ struct _MetaEgl
   PFNEGLCREATEIMAGEKHRPROC eglCreateImageKHR;
   PFNEGLDESTROYIMAGEKHRPROC eglDestroyImageKHR;
 
+  PFNEGLCREATESYNCPROC eglCreateSync;
+  PFNEGLDESTROYSYNCPROC eglDestroySync;
+  PFNEGLWAITSYNCPROC eglWaitSync;
+
   PFNEGLBINDWAYLANDDISPLAYWL eglBindWaylandDisplayWL;
   PFNEGLQUERYWAYLANDBUFFERWL eglQueryWaylandBufferWL;
 
@@ -1162,6 +1166,69 @@ meta_egl_query_display_attrib (MetaEgl     *egl,
   return TRUE;
 }
 
+gboolean
+meta_egl_create_sync (MetaEgl           *egl,
+                      EGLDisplay         display,
+                      EGLenum            type,
+                      const EGLAttrib   *attrib_list,
+                      EGLSync           *egl_sync,
+                      GError           **error)
+{
+  EGLSync sync;
+
+  if (!is_egl_proc_valid (egl->eglCreateSync, error))
+    return FALSE;
+
+  sync = egl->eglCreateSync (display, type, attrib_list);
+
+  if (sync == EGL_NO_SYNC)
+    {
+      set_egl_error (error);
+      return FALSE;
+    }
+
+  *egl_sync = sync;
+
+  return TRUE;
+}
+
+gboolean
+meta_egl_destroy_sync (MetaEgl     *egl,
+                       EGLDisplay   display,
+                       EGLSync      sync,
+                       GError     **error)
+{
+  if (!is_egl_proc_valid (egl->eglDestroySync, error))
+    return FALSE;
+
+  if (!egl->eglDestroySync (display, sync))
+    {
+      set_egl_error (error);
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
+gboolean
+meta_egl_wait_sync (MetaEgl     *egl,
+                    EGLDisplay   display,
+                    EGLSync      sync,
+                    EGLint       flags,
+                    GError     **error)
+{
+  if (!is_egl_proc_valid (egl->eglWaitSync, error))
+    return FALSE;
+
+  if (!egl->eglWaitSync (display, sync, flags))
+    {
+      set_egl_error (error);
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
 #define GET_EGL_PROC_ADDR(proc) \
   egl->proc = (void *) eglGetProcAddress (#proc);
 
@@ -1175,6 +1242,10 @@ meta_egl_constructed (GObject *object)
   GET_EGL_PROC_ADDR (eglCreateImageKHR);
   GET_EGL_PROC_ADDR (eglDestroyImageKHR);
 
+  GET_EGL_PROC_ADDR (eglCreateSync);
+  GET_EGL_PROC_ADDR (eglDestroySync);
+  GET_EGL_PROC_ADDR (eglWaitSync);
+
   GET_EGL_PROC_ADDR (eglBindWaylandDisplayWL);
   GET_EGL_PROC_ADDR (eglQueryWaylandBufferWL);
 
diff --git a/src/backends/meta-egl.h b/src/backends/meta-egl.h
index 8b955c90c..af3150c3c 100644
--- a/src/backends/meta-egl.h
+++ b/src/backends/meta-egl.h
@@ -276,3 +276,21 @@ gboolean meta_egl_query_display_attrib (MetaEgl     *egl,
                                         EGLint       attribute,
                                         EGLAttrib   *value,
                                         GError     **error);
+
+gboolean meta_egl_create_sync (MetaEgl           *egl,
+                               EGLDisplay         display,
+                               EGLenum            type,
+                               const EGLAttrib   *attrib_list,
+                               EGLSync           *egl_sync,
+                               GError           **error);
+
+gboolean meta_egl_destroy_sync (MetaEgl     *egl,
+                                EGLDisplay   display,
+                                EGLSync      sync,
+                                GError     **error);
+
+gboolean meta_egl_wait_sync (MetaEgl     *egl,
+                             EGLDisplay   display,
+                             EGLSync      sync,
+                             EGLint       flags,
+                             GError     **error);