Merge branch 'ebassi/egl-display-get' into 'master'

Add backend-specific getter for the EGLDisplay

See merge request GNOME/gtk!3542

gdk/wayland/gdkglcontext-wayland.c

@@ -333,8 +333,31 @@ gdk_wayland_gl_context_init (GdkWaylandGLContext *self)
 {
 }
 
+/**
+ * gdk_wayland_display_get_egl_display:
+ * @display: (type GdkWaylandDisplay): a Wayland display
+ *
+ * Retrieves the EGL display connection object for the given GDK display.
+ *
+ * Returns: (nullable): the EGL display
+ */
+gpointer
+gdk_wayland_display_get_egl_display (GdkDisplay *display)
+{
+  GdkWaylandDisplay *display_wayland;
+
+  g_return_val_if_fail (GDK_IS_WAYLAND_DISPLAY (display), NULL);
+
+  if (!gdk_wayland_display_init_gl (display))
+    return NULL;
+
+  display_wayland = GDK_WAYLAND_DISPLAY (display);
+
+  return display_wayland->egl_display;
+}
+
 static EGLDisplay
-gdk_wayland_get_display (GdkWaylandDisplay *display_wayland)
+get_egl_display (GdkWaylandDisplay *display_wayland)
 {
   EGLDisplay dpy = NULL;
 
@@ -343,12 +366,12 @@ gdk_wayland_get_display (GdkWaylandDisplay *display_wayland)
       PFNEGLGETPLATFORMDISPLAYPROC getPlatformDisplay =
         (void *) eglGetProcAddress ("eglGetPlatformDisplay");
 
-      if (getPlatformDisplay)
+      if (getPlatformDisplay != NULL)
         dpy = getPlatformDisplay (EGL_PLATFORM_WAYLAND_EXT,
                                   display_wayland->wl_display,
                                   NULL);
-      if (dpy)
-        return dpy;
+      if (dpy != NULL)
+        goto out;
     }
 
   if (epoxy_has_egl_extension (NULL, "EGL_EXT_platform_base"))
@@ -356,15 +379,18 @@ gdk_wayland_get_display (GdkWaylandDisplay *display_wayland)
       PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplay =
         (void *) eglGetProcAddress ("eglGetPlatformDisplayEXT");
 
-      if (getPlatformDisplay)
+      if (getPlatformDisplay != NULL)
         dpy = getPlatformDisplay (EGL_PLATFORM_WAYLAND_EXT,
                                   display_wayland->wl_display,
                                   NULL);
-      if (dpy)
-        return dpy;
+      if (dpy != NULL)
+        goto out;
     }
 
-  return eglGetDisplay ((EGLNativeDisplayType) display_wayland->wl_display);
+  dpy = eglGetDisplay ((EGLNativeDisplayType) display_wayland->wl_display);
+
+out:
+  return dpy;
 }
 
 gboolean
@@ -377,7 +403,7 @@ gdk_wayland_display_init_gl (GdkDisplay *display)
   if (display_wayland->have_egl)
     return TRUE;
 
-  dpy = gdk_wayland_get_display (display_wayland);
+  dpy = get_egl_display (display_wayland);
 
   if (dpy == NULL)
     return FALSE;

gdk/wayland/gdkwaylanddisplay.h

@@ -63,6 +63,9 @@ GDK_AVAILABLE_IN_ALL
 gboolean                gdk_wayland_display_query_registry      (GdkDisplay  *display,
 								 const char *global);
 
+GDK_AVAILABLE_IN_4_4
+gpointer                gdk_wayland_display_get_egl_display     (GdkDisplay  *display);
+
 G_END_DECLS
 
 #endif /* __GDK_WAYLAND_DISPLAY_H__ */

gdk/x11/gdkglcontext-egl.c

@@ -84,12 +84,29 @@ drawable_info_free (gpointer data)
   g_free (info);
 }
 
-static EGLDisplay
+/**
+ * gdk_x11_display_get_egl_display:
+ * @display: (type GdkX11Display): an X11 display
+ *
+ * Retrieves the EGL display connection object for the given GDK display.
+ *
+ * This function returns `NULL` if GDK is using GLX.
+ *
+ * Returns: (nullable): the EGL display object
+ *
+ * Since: 4.4
+ */
+gpointer
 gdk_x11_display_get_egl_display (GdkDisplay *display)
 {
   EGLDisplay edpy = NULL;
   Display *dpy;
 
+  g_return_val_if_fail (GDK_IS_X11_DISPLAY (display), NULL);
+
+  if (GDK_X11_DISPLAY (display)->have_glx)
+    return NULL;
+
   edpy = g_object_get_data (G_OBJECT (display), "-gdk-x11-egl-display");
   if (edpy != NULL)
     return edpy;

gdk/x11/gdkx11glcontext.h

@@ -48,6 +48,9 @@ gboolean        gdk_x11_display_get_egl_version (GdkDisplay *display,
                                                  int        *major,
                                                  int        *minor);
 
+GDK_AVAILABLE_IN_4_4
+gpointer        gdk_x11_display_get_egl_display (GdkDisplay *display);
+
 G_END_DECLS
 
 #endif /* __GDK_X11_GL_CONTEXT_H__ */

testsuite/gtk/meson.build

@@ -223,7 +223,6 @@ endforeach
 if add_languages('cpp', required: false, native: false)
   test_exe = executable('autotestkeywords',
     sources: 'autotestkeywords.cc',
-    cpp_args: test_cargs,
     dependencies: libgtk_dep,
     install: get_option('install-tests'),
     install_dir: testexecdir,