libs: display: egl: add gst_vaapi_display_egl_set_current_display()

Adds a new function that changes the internal EGL display to the
current one (eglGetCurrentDisplay()) and sets the current context
too (eglGetCurrentContext()).

This new function is called by gst_vaapi_texture_egl_create() updating
the GstVaapiDisplayEGL with the current EGL display.

https://bugzilla.gnome.org/show_bug.cgi?id=773453

3 files changed, 28 insertions, 14 deletions

diff --git a/gst-libs/gst/vaapi/gstvaapidisplay_egl.c b/gst-libs/gst/vaapi/gstvaapidisplay_egl.c
index 883257aa..c4fdbc24 100644
--- a/gst-libs/gst/vaapi/gstvaapidisplay_egl.c
+++ b/gst-libs/gst/vaapi/gstvaapidisplay_egl.c
@@ -414,3 +414,26 @@ gst_vaapi_display_egl_set_gl_context (GstVaapiDisplayEGL * display,
 
   return ensure_context_is_wrapped (display, gl_context);
 }
+
+gboolean
+gst_vaapi_display_egl_set_current_display (GstVaapiDisplayEGL * display)
+{
+  EglDisplay *egl_display;
+
+  g_return_val_if_fail (GST_VAAPI_IS_DISPLAY_EGL (display), FALSE);
+
+  if (G_UNLIKELY (eglGetCurrentDisplay () == EGL_NO_DISPLAY))
+    return TRUE;
+  if (G_LIKELY (display->egl_display->base.handle.p == eglGetCurrentDisplay ()))
+    return TRUE;
+
+  egl_display = egl_display_new_wrapped (eglGetCurrentDisplay ());
+  if (!egl_display)
+    return FALSE;
+  egl_object_replace (&display->egl_display, egl_display);
+  egl_object_unref (egl_display);
+  if (!gst_vaapi_display_egl_set_gl_context (display, eglGetCurrentContext ()))
+    return FALSE;
+
+  return TRUE;
+}
diff --git a/gst-libs/gst/vaapi/gstvaapidisplay_egl.h b/gst-libs/gst/vaapi/gstvaapidisplay_egl.h
index 22a80deb..ccabf0f8 100644
--- a/gst-libs/gst/vaapi/gstvaapidisplay_egl.h
+++ b/gst-libs/gst/vaapi/gstvaapidisplay_egl.h
@@ -51,6 +51,9 @@ gboolean
 gst_vaapi_display_egl_set_gl_context (GstVaapiDisplayEGL * display,
     EGLContext gl_context);
 
+gboolean
+gst_vaapi_display_egl_set_current_display (GstVaapiDisplayEGL * display);
+
 GType
 gst_vaapi_display_egl_get_type (void) G_GNUC_CONST;
 
diff --git a/gst-libs/gst/vaapi/gstvaapitexture_egl.c b/gst-libs/gst/vaapi/gstvaapitexture_egl.c
index c50bb85d..efeced4a 100644
--- a/gst-libs/gst/vaapi/gstvaapitexture_egl.c
+++ b/gst-libs/gst/vaapi/gstvaapitexture_egl.c
@@ -256,20 +256,8 @@ gst_vaapi_texture_egl_create (GstVaapiTextureEGL * texture)
       GST_VAAPI_DISPLAY_EGL (GST_VAAPI_OBJECT_DISPLAY (texture));
 
   if (GST_VAAPI_TEXTURE (texture)->is_wrapped) {
-    if (G_UNLIKELY (display->egl_display->base.handle.p !=
-            eglGetCurrentDisplay ())) {
-      EglDisplay *current_egl_display =
-          egl_display_new_wrapped (eglGetCurrentDisplay ());
-      if (!current_egl_display)
-        return FALSE;
-
-      egl_object_replace (&display->egl_display, current_egl_display);
-      egl_object_unref (current_egl_display);
-
-      if (!gst_vaapi_display_egl_set_gl_context (display,
-              eglGetCurrentContext ()))
-        return FALSE;
-    }
+    if (!gst_vaapi_display_egl_set_current_display (display))
+      return FALSE;
   }
 
   egl_object_replace (&texture->egl_context,