[gtk/wip/otte/gleanup: 30/70] x11: Store the EGL surface in the GdkSurfaceX11

[Chun-wei Fan <fanchunwei src gnome org>]

commit 7c91ed7064f131d0c76ccf6ee70cab80c10bcbf5
Author: Benjamin Otte <otte redhat com>
Date:   Thu Jun 10 23:10:22 2021 +0200

    x11: Store the EGL surface in the GdkSurfaceX11
    
    Avoids having to use private data, though the benefit is somewhat
    limited as we still have to put the destructor in the egl code and can't
    just put it in gdk_surface_x11_finalize().

 gdk/x11/gdkglcontext-egl.c | 35 +++++++++++++++++++++--------------
 gdk/x11/gdkglcontext-x11.h |  1 +
 gdk/x11/gdksurface-x11.c   |  6 +++++-
 gdk/x11/gdksurface-x11.h   |  1 +
 4 files changed, 28 insertions(+), 15 deletions(-)
---
diff --git a/gdk/x11/gdkglcontext-egl.c b/gdk/x11/gdkglcontext-egl.c
index fc1aaf6ad2..4ecdcf3fbd 100644
--- a/gdk/x11/gdkglcontext-egl.c
+++ b/gdk/x11/gdkglcontext-egl.c
@@ -277,27 +277,34 @@ gdk_x11_display_get_egl_dummy_surface (GdkDisplay *display,
 static EGLSurface
 gdk_x11_surface_get_egl_surface (GdkSurface *surface)
 {
-  GdkDisplay *display = gdk_surface_get_display (surface);
+  GdkX11Surface *self = GDK_X11_SURFACE (surface);
+  GdkDisplay *display = gdk_surface_get_display (GDK_SURFACE (self));
   GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
-  DrawableInfo *info;
 
-  info = g_object_get_data (G_OBJECT (surface), "-gdk-x11-egl-drawable");
-  if (info != NULL)
-    return info->egl_surface;
+  if (self->egl_surface)
+    return self->egl_surface;
 
-  info = g_new0 (DrawableInfo, 1);
-  info->egl_display = display_x11->egl_display;
-  info->egl_config = display_x11->egl_config;
-  info->egl_surface =
-    eglCreateWindowSurface (info->egl_display, info->egl_config,
+  self->egl_surface =
+    eglCreateWindowSurface (display_x11->egl_display, 
+                            display_x11->egl_config,
                             (EGLNativeWindowType) gdk_x11_surface_get_xid (surface),
                             NULL);
 
-  g_object_set_data_full (G_OBJECT (surface), "-gdk-x11-egl-drawable",
-                          info,
-                          drawable_info_free);
+  return self->egl_surface;
+}
 
-  return info->egl_surface;
+void
+gdk_x11_surface_destroy_egl_surface (GdkX11Surface *self)
+{
+  GdkX11Display *display_x11;
+
+  if (self->egl_surface == NULL)
+    return;
+
+  display_x11 = GDK_X11_DISPLAY (gdk_surface_get_display (GDK_SURFACE (self)));
+
+  eglDestroySurface (display_x11->egl_display, self->egl_surface);
+  self->egl_surface = NULL;
 }
 
 static void
diff --git a/gdk/x11/gdkglcontext-x11.h b/gdk/x11/gdkglcontext-x11.h
index 97583133f2..ca296a2c97 100644
--- a/gdk/x11/gdkglcontext-x11.h
+++ b/gdk/x11/gdkglcontext-x11.h
@@ -93,6 +93,7 @@ gboolean                gdk_x11_gl_context_glx_make_current     (GdkDisplay    *
 typedef struct _GdkX11GLContextEGL      GdkX11GLContextEGL;
 
 gboolean                gdk_x11_display_init_egl                (GdkX11Display *display_x11);
+void                    gdk_x11_surface_destroy_egl_surface     (GdkX11Surface *self);
 
 GType                   gdk_x11_gl_context_egl_get_type         (void) G_GNUC_CONST;
 GdkX11GLContext *       gdk_x11_gl_context_egl_new              (GdkSurface    *surface,
diff --git a/gdk/x11/gdksurface-x11.c b/gdk/x11/gdksurface-x11.c
index add72799f6..6edf839cf8 100644
--- a/gdk/x11/gdksurface-x11.c
+++ b/gdk/x11/gdksurface-x11.c
@@ -1368,7 +1368,11 @@ gdk_x11_surface_destroy (GdkSurface *surface,
     }
 
   if (!foreign_destroy)
-    XDestroyWindow (GDK_SURFACE_XDISPLAY (surface), GDK_SURFACE_XID (surface));
+    {
+      gdk_x11_surface_destroy_egl_surface (impl);
+
+      XDestroyWindow (GDK_SURFACE_XDISPLAY (surface), GDK_SURFACE_XID (surface));
+    }
 }
 
 /* This function is called when the XWindow is really gone.
diff --git a/gdk/x11/gdksurface-x11.h b/gdk/x11/gdksurface-x11.h
index 89f4b12845..cb8f92307f 100644
--- a/gdk/x11/gdksurface-x11.h
+++ b/gdk/x11/gdksurface-x11.h
@@ -87,6 +87,7 @@ struct _GdkX11Surface
   guint compute_size_source_id;
 
   cairo_surface_t *cairo_surface;
+  /* EGLSurface */ gpointer egl_surface;
 
   int abs_x;
   int abs_y;