[249/906] begin GstGLWindow in order to totally remove gstfreeglut

gst-libs/gst/gl/CMakeLists.txt

@@ -16,8 +16,19 @@ add_library (gstgl STATIC
 	gstglfilter.c
 	gstglshader.c)
 
+#FIXME: get ride of this condition
+if (WIN32)
 target_link_libraries(gstgl
-  general gstfreeglut
+  general ${OPENGL_LIBRARIES}
+  general ${GLEW_LIBRARY}
+  general ${GLIB2_LIBRARIES}
+  general ${GSTREAMER_LIBRARIES}
+  gdi32
+  winmm)
+else (WIN32)
+target_link_libraries(gstgl
+  general ${OPENGL_LIBRARIES}
   general ${GLEW_LIBRARY}
   general ${GLIB2_LIBRARIES}
   general ${GSTREAMER_LIBRARIES})
+endif (WIN32)

gst-libs/gst/gl/gstgldisplay.h

@@ -23,10 +23,7 @@
 #ifndef __GST_GL_H__
 #define __GST_GL_H__
 
-#include <GL/glew.h>
+#include <gstglwindow.h>
-#include <gstfreeglut.h>
-
-#include <gst/gst.h>
 #include <gst/video/video.h>
 
 #include "gstglshader.h"
@@ -114,9 +111,9 @@ struct _GstGLDisplay {
   GMutex* mutex;
 
   //gl context
-  gint glutWinId;
+  GThread* gl_thread;
+  GstGLWindow* gl_window;
   gulong winId;
-  GString* title;
   gint win_xpos;
   gint win_ypos;
   gboolean visible;
@@ -125,20 +122,6 @@ struct _GstGLDisplay {
 
   //conditions
   GCond* cond_create_context;
-  GCond* cond_destroy_context;
-  GCond* cond_change_context;
-  GCond* cond_generic;
-  GCond* cond_gen_texture;
-  GCond* cond_del_texture;
-  GCond* cond_init_upload;
-  GCond* cond_do_upload;
-  GCond* cond_init_download;
-  GCond* cond_do_download;
-  GCond* cond_gen_fbo;
-  GCond* cond_use_fbo;
-  GCond* cond_del_fbo;
-  GCond* cond_gen_shader;
-  GCond* cond_del_shader;
 
   //generic gl code
   GstGLDisplayThreadFunc generic_callback;

gst-libs/gst/gl/gstglwindow.h

@@ -0,0 +1,88 @@
+/* 
+ * GStreamer
+ * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_GL_WINDOW_H__
+#define __GST_GL_WINDOW_H__
+
+
+#include <GL/glew.h>
+#include <GL/gl.h>
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_GL_TYPE_WINDOW         (gst_gl_window_get_type())
+#define GST_GL_WINDOW(o)           (G_TYPE_CHECK_INSTANCE_CAST((o), GST_GL_TYPE_WINDOW, GstGLWindow))
+#define GST_GL_WINDOW_CLASS(k)     (G_TYPE_CHECK_CLASS((k), GST_GL_TYPE_WINDOW, GstGLWindowClass))
+#define GST_GL_IS_WINDOW(o)        (G_TYPE_CHECK_INSTANCE_TYPE((o), GST_GL_TYPE_WINDOW))
+#define GST_GL_IS_WINDOW_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE((k), GST_GL_TYPE_WINDOW))
+#define GST_GL_WINDOW_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS((o), GST_GL_TYPE_WINDOW, GstGLWindowClass))
+
+#define GST_GL_WINDOW_ERROR (gst_gl_window_error_quark ())
+
+typedef void (* GstGLWindowCB) ( gpointer );
+typedef void (* GstGLWindowCB2) ( gpointer, gint, gint );
+
+typedef struct _GstGLWindow        GstGLWindow;
+typedef struct _GstGLWindowPrivate GstGLWindowPrivate;
+typedef struct _GstGLWindowClass   GstGLWindowClass;
+
+struct _GstGLWindow {
+  /*< private >*/
+  GObject parent;
+  GstGLWindowPrivate *priv;
+};
+
+struct _GstGLWindowClass {
+  /*< private >*/
+  GObjectClass parent_class;
+  guint64 instance;
+};
+
+/* methods */
+
+GQuark gst_gl_window_error_quark (void);
+GType gst_gl_window_get_type (void);
+
+GstGLWindow * gst_gl_window_new (gint width, gint height);
+
+void gst_gl_window_set_external_window_id (GstGLWindow *window, guint64 id);
+void gst_gl_window_set_external_gl_context (GstGLWindow *window, guint64 context);
+void gst_gl_window_set_draw_callback (GstGLWindow *window, GstGLWindowCB callback, gpointer data);
+void gst_gl_window_set_resize_callback (GstGLWindow *window, GstGLWindowCB2 callback, gpointer data);
+void gst_gl_window_set_close_callback (GstGLWindow *window, GstGLWindowCB callback, gpointer data);
+
+gboolean gst_gl_window_has_internal_window_id (GstGLWindow *window);
+gboolean gst_gl_window_has_internal_gl_context (GstGLWindow *window);
+
+guint64 gst_gl_window_get_window_id (GstGLWindow *window);
+guint64 gst_gl_window_get_gl_context (GstGLWindow *window);
+
+void gst_gl_window_visible (GstGLWindow *window, gboolean visible);
+void gst_gl_window_draw (GstGLWindow *window);
+void gst_gl_window_resize (GstGLWindow *window, gint width, gint height);
+void gst_gl_window_run_loop (GstGLWindow *window);
+void gst_gl_window_quit_loop (GstGLWindow *window);
+
+void gst_gl_window_send_message (GstGLWindow *window, GstGLWindowCB callback, gpointer data);
+
+G_END_DECLS
+
+#endif /* __GST_GL_WINDOW_H__ */

gst-libs/gst/gl/gstglwindow_win32.c

@@ -0,0 +1,542 @@
+/* 
+ * GStreamer
+ * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#undef UNICODE
+#include <windows.h>
+#define UNICODE
+
+#include "gstglwindow.h"
+
+
+#define WM_GSTGLWINDOW (WM_APP+1)
+
+void gst_gl_window_set_pixel_format (GstGLWindow *window);
+LRESULT CALLBACK window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+
+#define GST_GL_WINDOW_GET_PRIVATE(o)  \
+  (G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_WINDOW, GstGLWindowPrivate))
+
+enum
+{
+  PROP_0
+};
+
+struct _GstGLWindowPrivate
+{
+  HWND internal_win_id;
+  HWND external_win_id;
+  HDC device;
+  HGLRC gl_context;
+  gboolean has_external_window_id;
+  gboolean has_external_gl_context;
+  GstGLWindowCB draw_cb;
+  gpointer draw_data;
+  GstGLWindowCB2 resize_cb;
+  gpointer resize_data;
+  GstGLWindowCB close_cb;
+  gpointer close_data;
+};
+
+G_DEFINE_TYPE (GstGLWindow, gst_gl_window, G_TYPE_OBJECT);
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "GstGLWindow"
+
+gboolean _gst_gl_window_debug = FALSE;
+
+/* Must be called in the gl thread */
+static void
+gst_gl_window_finalize (GObject * object)
+{
+  GstGLWindow *window = GST_GL_WINDOW (object);
+  GstGLWindowPrivate *priv = window->priv;
+
+  G_OBJECT_CLASS (gst_gl_window_parent_class)->finalize (object);
+}
+
+static void
+gst_gl_window_log_handler (const gchar *domain, GLogLevelFlags flags,
+                           const gchar *message, gpointer user_data)
+{
+  if (_gst_gl_window_debug) {
+    g_log_default_handler (domain, flags, message, user_data);
+  }
+}
+
+static void
+gst_gl_window_class_init (GstGLWindowClass * klass)
+{
+  WNDCLASS wc;
+  GObjectClass *obj_class = G_OBJECT_CLASS (klass);
+  klass->instance = (guint64) GetModuleHandle (NULL);
+
+  g_type_class_add_private (klass, sizeof (GstGLWindowPrivate));
+
+  obj_class->finalize = gst_gl_window_finalize;
+
+  GetClassInfo ((HINSTANCE)klass->instance, "GSTGL", &wc);
+
+  ZeroMemory (&wc, sizeof(WNDCLASS));
+
+  wc.lpfnWndProc = window_proc;
+  wc.cbClsExtra = 0;
+  wc.cbWndExtra = 0;
+  wc.hInstance = (HINSTANCE) klass->instance;
+  wc.hIcon = LoadIcon( NULL, IDI_WINLOGO );
+  wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
+  wc.hCursor = LoadCursor( NULL, IDC_ARROW );
+  wc.hbrBackground = NULL;
+  wc.lpszMenuName = NULL;
+  wc.lpszClassName = "GSTGL";
+
+  RegisterClass (&wc);
+}
+
+static void
+gst_gl_window_init (GstGLWindow *window)
+{
+  window->priv = GST_GL_WINDOW_GET_PRIVATE (window);
+
+  if (g_getenv ("GST_GL_WINDOW_DEBUG") != NULL)
+    _gst_gl_window_debug = TRUE;
+
+  g_log_set_handler ("GstGLWindow", G_LOG_LEVEL_DEBUG,
+    gst_gl_window_log_handler, NULL);
+}
+
+/* Must be called in the gl thread */
+GstGLWindow *
+gst_gl_window_new (gint width, gint height)
+{
+  GstGLWindow *window = g_object_new (GST_GL_TYPE_WINDOW, NULL);
+  GstGLWindowPrivate *priv = window->priv;
+  GstGLWindowClass* klass = GST_GL_WINDOW_GET_CLASS (window);
+  
+  static gint x = 50;
+  static gint y = 0;
+  y = 50 + height * y++;
+
+  priv->internal_win_id = 0;
+  priv->external_win_id = 0;
+  priv->device = 0;
+  priv->gl_context = 0;
+  priv->has_external_window_id = FALSE;
+  priv->has_external_gl_context = FALSE;
+  priv->draw_cb = NULL;
+  priv->draw_data = NULL;
+  priv->resize_cb = NULL;
+  priv->resize_data = NULL;
+  priv->close_cb = NULL;
+  priv->close_data = NULL;
+
+  width += 2 * GetSystemMetrics (SM_CXSIZEFRAME);
+  height += 2 * GetSystemMetrics (SM_CYSIZEFRAME) + GetSystemMetrics (SM_CYCAPTION);
+
+  priv->internal_win_id = CreateWindowEx (
+    0,
+    "GSTGL",
+    "OpenGL renderer",
+    WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW,
+    x, y, width, height,
+    (HWND) NULL,
+    (HMENU) NULL,
+    (HINSTANCE) klass->instance,
+    window
+  );
+
+  g_assert (priv->internal_win_id);
+
+  //device is set in the window_proc 
+  g_assert (priv->device);
+
+  UpdateWindow (priv->internal_win_id);
+  ShowCursor (TRUE);
+
+  wglMakeCurrent (priv->device, priv->gl_context);
+
+  return window;
+}
+
+GQuark
+gst_gl_window_error_quark (void)
+{
+  return g_quark_from_static_string ("gst-gl-window-error");
+}
+
+void 
+gst_gl_window_set_external_window_id (GstGLWindow *window, guint64 id)
+{
+  g_warning ("gst_gl_window_set_external_window_id: not implemented\n");
+}
+
+void 
+gst_gl_window_set_external_gl_context (GstGLWindow *window, guint64 context)
+{
+  g_warning ("gst_gl_window_set_external_gl_context: not implemented\n");
+}
+
+/* Must be called in the gl thread */
+void
+gst_gl_window_set_draw_callback (GstGLWindow *window, GstGLWindowCB callback, gpointer data)
+{
+  GstGLWindowPrivate *priv = window->priv;
+  
+  priv->draw_cb = callback;
+  priv->draw_data = data;
+}
+
+/* Must be called in the gl thread */
+void
+gst_gl_window_set_resize_callback (GstGLWindow *window, GstGLWindowCB2 callback , gpointer data)
+{
+  GstGLWindowPrivate *priv = window->priv;
+
+  priv->resize_cb = callback;
+  priv->resize_data = data;
+}
+
+/* Must be called in the gl thread */
+void
+gst_gl_window_set_close_callback (GstGLWindow *window, GstGLWindowCB callback, gpointer data)
+{
+  GstGLWindowPrivate *priv = window->priv;
+
+  priv->close_cb = callback;
+  priv->close_data = data;
+}
+
+/* Must be called in the gl thread */
+gboolean
+gst_gl_window_has_external_window_id (GstGLWindow *window)
+{
+  gboolean has_internal_window_id = TRUE;
+  GstGLWindowPrivate *priv = window->priv;
+  
+  has_internal_window_id = priv->has_external_window_id;
+
+  return has_internal_window_id;
+}
+
+/* Must be called in the gl thread */
+gboolean
+gst_gl_window_has_internal_gl_context (GstGLWindow *window)
+{
+  gboolean has_external_gl_context = TRUE;
+  GstGLWindowPrivate *priv = window->priv;
+  
+  
+  has_external_gl_context = priv->has_external_gl_context;
+  
+
+  return has_external_gl_context;
+}
+
+/* Must be called in the gl thread */
+guint64 gst_gl_window_get_window_id (GstGLWindow *window)
+{
+  g_warning ("gst_gl_window_get_window_id: not implemented\n");
+
+  return 0;
+}
+
+/* Must be called in the gl thread */
+guint64
+gst_gl_window_get_gl_context (GstGLWindow *window)
+{
+  g_warning ("gst_gl_window_get_gl_context: not implemented\n");
+
+  return 0;
+}
+
+/* Thread safe */
+void
+gst_gl_window_visible (GstGLWindow *window, gboolean visible)
+{
+  GstGLWindowPrivate *priv = window->priv;
+  BOOL ret = FALSE; 
+  
+  if (visible)
+    ret = ShowWindow (priv->internal_win_id, SW_SHOW);
+  else
+    ret = ShowWindow (priv->internal_win_id, SW_HIDE);
+}
+
+/* Thread safe */
+void
+gst_gl_window_draw (GstGLWindow *window)
+{
+  GstGLWindowPrivate *priv = window->priv;
+  
+  if (!priv->has_external_window_id)
+    RedrawWindow (priv->internal_win_id, NULL, NULL,
+      RDW_NOERASE | RDW_INTERNALPAINT | RDW_INVALIDATE /*| RDW_UPDATENOW*/);
+  else
+  {
+    PAINTSTRUCT ps;
+    
+    /*RECT destsurf_rect;
+    POINT dest_surf_point;
+
+    dest_surf_point.x = 0;
+    dest_surf_point.y = 0;
+    ClientToScreen (priv->external_win_id, &dest_surf_point);
+    GetClientRect (priv->external_win_id, &destsurf_rect);
+    OffsetRect (&destsurf_rect, dest_surf_point.x, dest_surf_point.y);
+
+    if (window->State.Width != (destsurf_rect.right - destsurf_rect.left) ||
+        window->State.Height != (destsurf_rect.bottom - destsurf_rect.top))
+    {
+        window->State.Width = destsurf_rect.right - destsurf_rect.left;
+        window->State.Height = destsurf_rect.bottom - destsurf_rect.top;
+        window->State.NeedToResize = GL_FALSE;
+        if( FETCH_WCB( *window, Reshape ) )
+            INVOKE_WCB( *window, Reshape, ( window->State.Width, window->State.Height ) );
+        glViewport( 0, 0, window->State.Width, window->State.Height );
+    }*/
+
+    BeginPaint (priv->external_win_id, &ps);
+    priv->draw_cb (priv->draw_data);  //FIXME: wrong thread caller
+    //glFlush();
+    SwapBuffers (priv->device);
+    EndPaint (priv->external_win_id, &ps);
+  }
+}
+
+/* Thread safe */
+void
+gst_gl_window_resize (GstGLWindow *window, gint width, gint height)
+{
+  GstGLWindowPrivate *priv = window->priv;
+  gint x = 0;
+  gint y = 0;
+  RECT winRect;
+
+  GetWindowRect (priv->internal_win_id, &winRect);
+  x = winRect.left;
+  y = winRect.top;
+
+  width += 2 * GetSystemMetrics (SM_CXSIZEFRAME);
+  height += 2 * GetSystemMetrics (SM_CYSIZEFRAME) + GetSystemMetrics (SM_CYCAPTION);
+
+  SetWindowPos (priv->internal_win_id, HWND_TOP, x, y, width, height,
+    SWP_ASYNCWINDOWPOS | SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOSENDCHANGING | SWP_NOZORDER);
+}
+
+void
+gst_gl_window_run_loop (GstGLWindow *window)
+{
+  GstGLWindowPrivate *priv = window->priv;
+  gboolean running = TRUE;
+  gboolean bRet = FALSE;
+  MSG msg;
+
+  g_debug ("start loop\n");
+
+  while (running && (bRet = GetMessage (&msg, NULL, 0, 0)) != 0)
+  { 
+      if (bRet == -1)
+      {
+          g_debug ("error in gst_gl_window_run_loop\n");
+          running = FALSE;
+      }
+      else
+      {
+          TranslateMessage (&msg); 
+          DispatchMessage (&msg); 
+      }
+  }
+  /*while (GetMessage (&msg, priv->internal_win_id, 0, 0))
+  { 
+    TranslateMessage (&msg); 
+    DispatchMessage (&msg); 
+  }*/
+  g_debug ("loop terminated\n");
+}
+
+/* Must be called in the gl thread */
+void
+gst_gl_window_quit_loop (GstGLWindow *window)
+{
+  PostQuitMessage(0);
+}
+
+void
+gst_gl_window_send_message (GstGLWindow *window, GstGLWindowCB callback, gpointer data)
+{
+  GstGLWindowPrivate *priv = NULL;
+  LRESULT res;
+  g_assert (window);
+  priv = window->priv;
+  res = SendMessage (priv->internal_win_id, WM_GSTGLWINDOW, (WPARAM) data, (LPARAM) callback);
+  g_assert (SUCCEEDED (res));
+}
+
+/* PRIVATE */
+
+void
+gst_gl_window_set_pixel_format (GstGLWindow *window)
+{
+    GstGLWindowPrivate *priv = window->priv;
+    PIXELFORMATDESCRIPTOR pfd;
+    gint pixelformat = 0;
+    gboolean res = FALSE;
+
+    pfd.nSize           = sizeof(PIXELFORMATDESCRIPTOR);
+    pfd.nVersion        = 1;
+    pfd.dwFlags         = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+    pfd.iPixelType      = PFD_TYPE_RGBA;
+    pfd.cColorBits      = 24;
+    pfd.cRedBits        = 0;
+    pfd.cRedShift       = 0;
+    pfd.cGreenBits      = 0;
+    pfd.cGreenShift     = 0;
+    pfd.cBlueBits       = 0;
+    pfd.cBlueShift      = 0;
+    pfd.cAlphaBits      = 0;
+    pfd.cAlphaShift     = 0;
+    pfd.cAccumBits      = 0;
+    pfd.cAccumRedBits   = 0;
+    pfd.cAccumGreenBits = 0;
+    pfd.cAccumBlueBits  = 0;
+    pfd.cAccumAlphaBits = 0;
+    pfd.cDepthBits      = 24;
+    pfd.cStencilBits    = 8;
+    pfd.cAuxBuffers     = 0;
+    pfd.iLayerType      = PFD_MAIN_PLANE;
+    pfd.bReserved       = 0;
+    pfd.dwLayerMask     = 0;
+    pfd.dwVisibleMask   = 0;
+    pfd.dwDamageMask    = 0;
+
+    pfd.cColorBits = (BYTE) GetDeviceCaps (priv->device, BITSPIXEL);
+
+    pixelformat = ChoosePixelFormat (priv->device, &pfd );
+    
+    g_assert (pixelformat);
+
+    res = SetPixelFormat (priv->device, pixelformat, &pfd);
+
+    g_assert (res);
+}
+
+LRESULT CALLBACK window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+  static gboolean created = FALSE;
+
+  if (uMsg == WM_CREATE) {
+
+    GstGLWindow *window = (GstGLWindow *) (((LPCREATESTRUCT) lParam)->lpCreateParams);
+
+    g_debug ("WM_CREATE\n");
+
+    SetWindowLongPtr (hWnd, GWLP_USERDATA, (LONG)(guint64)(gpointer) window);
+
+    g_assert (window);
+
+    {
+      GstGLWindowPrivate *priv = window->priv;
+      priv->device = GetDC (hWnd);
+      gst_gl_window_set_pixel_format (window);
+      priv->gl_context = wglCreateContext (priv->device);
+      ReleaseDC (hWnd, priv->device);
+    }
+
+    created = TRUE;
+  }
+  else if (created) {
+
+    GstGLWindow *window = (GstGLWindow *) (guint64) GetWindowLongPtr(hWnd, GWLP_USERDATA);
+    GstGLWindowPrivate *priv = NULL;
+
+    g_assert (window);
+
+    priv = window->priv;
+
+    g_assert (priv);
+
+    switch ( uMsg ) {
+
+      case WM_SIZE:
+      {
+        g_debug ("WM_SIZE\n");
+        if (priv->resize_cb)
+          priv->resize_cb (priv->resize_data, LOWORD(lParam), HIWORD(lParam));
+        break;
+      }
+
+      case WM_PAINT:
+      { 
+        g_debug ("WM_PAINT\n");
+        if (priv->draw_cb)
+        {
+          PAINTSTRUCT ps;
+          BeginPaint (hWnd, &ps);
+          priv->draw_cb (priv->draw_data);
+          SwapBuffers (priv->device);
+          EndPaint (hWnd, &ps);
+        }
+        break;
+      }
+
+      case WM_CLOSE:
+      {
+        g_debug ("WM_CLOSE\n");
+        if (priv->close_cb)
+          priv->close_cb (priv->close_data);
+        DestroyWindow(hWnd);
+        break;
+      }
+
+      case WM_DESTROY:
+      {
+        g_debug ("WM_DESTROY\n");
+        created = FALSE;
+        PostQuitMessage (0);
+        break;
+      }
+
+      case WM_CAPTURECHANGED:
+      {
+        g_debug ("WM_CAPTURECHANGED\n");
+        if (priv->draw_cb)
+          priv->draw_cb (priv->draw_data);
+        break;
+      }
+
+      case WM_GSTGLWINDOW:
+      {
+        GstGLWindowCB custom_cb = (GstGLWindowCB) lParam;
+        
+        g_debug ("WM_GSTGLWINDOW\n");
+        custom_cb ((gpointer) wParam);
+        break;
+      }
+
+      default:
+        break;
+    }
+  }
+
+  return DefWindowProc( hWnd, uMsg, wParam, lParam );
+}