sys/glsink/: Reenable video/x-raw-rgb and x-raw-yuv for glimagesink. Enable vblank synchronization. Remove unused c...

Original commit message from CVS:
* sys/glsink/glextensions.c:
* sys/glsink/glextensions.h:
* sys/glsink/glimagesink.c:
* sys/glsink/glimagesink.h:
* sys/glsink/gstgldisplay.c:
* sys/glsink/gstgldisplay.h:
* sys/glsink/gstopengl.c:
Reenable video/x-raw-rgb and x-raw-yuv for glimagesink.  Enable
vblank synchronization.  Remove unused code.

7 files changed, 113 insertions, 291 deletions

diff --git a/sys/glsink/glextensions.c b/sys/glsink/glextensions.c
index ccf55726..c5bde8a1 100644
--- a/sys/glsink/glextensions.c
+++ b/sys/glsink/glextensions.c
@@ -6,6 +6,7 @@
 #include <GL/glx.h>
 #include <GL/glxext.h>
 #include <string.h>
+#include <glib.h>
 
 #include "glextensions.h"
 
diff --git a/sys/glsink/glextensions.h b/sys/glsink/glextensions.h
index e161b8c4..8ac880fd 100644
--- a/sys/glsink/glextensions.h
+++ b/sys/glsink/glextensions.h
@@ -2,7 +2,7 @@
 #define __GST_GLEXTENSIONS_H__
 
 #include <GL/gl.h>
-#include <glib.h>
+//#include <glib.h>
 
 int gl_have_extension (const char *name);
 
diff --git a/sys/glsink/glimagesink.c b/sys/glsink/glimagesink.c
index 365e4c4e..0ce65a27 100644
--- a/sys/glsink/glimagesink.c
+++ b/sys/glsink/glimagesink.c
@@ -83,15 +83,15 @@ GST_ELEMENT_DETAILS ("OpenGL video sink",
 #define YUV_CAPS
 #endif
 static GstStaticPadTemplate gst_glimage_sink_template =
-GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
-    GST_STATIC_CAPS (GST_GL_VIDEO_CAPS)
+    GST_STATIC_CAPS (GST_GL_VIDEO_CAPS ";"
+        GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx ";"
+        GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
+        GST_VIDEO_CAPS_YUV ("{ AYUV, UYVY, YUY2 }"))
     );
 
-//GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx ";"
-//GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR YUV_CAPS)
-
 enum
 {
   ARG_0,
@@ -287,24 +287,13 @@ gst_glimage_sink_start (GstBaseSink * bsink)
 {
   GstGLImageSink *glimage_sink;
 
-  //gboolean ret;
-
   GST_DEBUG ("start");
 
   glimage_sink = GST_GLIMAGE_SINK (bsink);
 
-#if 0
-  glimage_sink->display = gst_gl_display_new ();
-  ret = gst_gl_display_connect (glimage_sink->display,
-      glimage_sink->display_name);
-  if (!ret) {
-    GST_ERROR ("failed to open display");
-    return FALSE;
-  }
-#endif
-
   if (glimage_sink->display && glimage_sink->window_id) {
     gst_gl_display_set_window (glimage_sink->display, glimage_sink->window_id);
+    gst_gl_display_set_visible (glimage_sink->display, TRUE);
   }
 
   GST_DEBUG ("start done");
@@ -322,6 +311,7 @@ gst_glimage_sink_stop (GstBaseSink * bsink)
   glimage_sink = GST_GLIMAGE_SINK (bsink);
 
   if (glimage_sink->display) {
+    gst_gl_display_set_visible (glimage_sink->display, FALSE);
     g_object_unref (glimage_sink->display);
     glimage_sink->display = NULL;
   }
@@ -390,29 +380,34 @@ gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
   int par_n, par_d;
   GstVideoFormat format;
   GstStructure *structure;
+  gboolean is_gl;
 
   GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
 
   glimage_sink = GST_GLIMAGE_SINK (bsink);
 
   structure = gst_caps_get_structure (caps, 0);
-  if (0) {
-    ok = gst_video_format_parse_caps (caps, &format, &width, &height);
-    ok &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
-    ok &= gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d);
-  } else {
+  if (gst_structure_has_name (structure, "video/x-raw-gl")) {
+    is_gl = TRUE;
+    format = GST_VIDEO_FORMAT_UNKNOWN;
     ok = gst_structure_get_int (structure, "width", &width);
     ok &= gst_structure_get_int (structure, "height", &height);
-    ok &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
-    ok &= gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d);
+  } else {
+    is_gl = FALSE;
+    ok = gst_video_format_parse_caps (caps, &format, &width, &height);
   }
+  ok &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
+  ok &= gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d);
 
   if (!ok)
     return FALSE;
 
   GST_VIDEO_SINK_WIDTH (glimage_sink) = width;
   GST_VIDEO_SINK_HEIGHT (glimage_sink) = height;
-  //glimage_sink->format = format;
+  glimage_sink->is_gl = is_gl;
+  glimage_sink->format = format;
+  glimage_sink->width = width;
+  glimage_sink->height = height;
   glimage_sink->fps_n = fps_n;
   glimage_sink->fps_d = fps_d;
   glimage_sink->par_n = par_n;
@@ -425,73 +420,53 @@ static GstFlowReturn
 gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf)
 {
   GstGLImageSink *glimage_sink;
-  GstGLBuffer *gl_buffer = GST_GL_BUFFER (buf);
+  GstGLBuffer *gl_buffer;
   GstGLDisplay *display;
 
-  GST_DEBUG ("render");
-
   glimage_sink = GST_GLIMAGE_SINK (bsink);
 
-  if (glimage_sink->display == NULL) {
-    glimage_sink->display = g_object_ref (gl_buffer->display);
-#if 1
-    if (glimage_sink->window_id) {
-      gst_gl_display_set_window (glimage_sink->display,
-          glimage_sink->window_id);
-    }
-#endif
-  } else {
-    g_assert (gl_buffer->display == glimage_sink->display);
-  }
-
-  display = gl_buffer->display;
-
-  /* FIXME polling causes a round-trip delay.  This should be changed
-   * to catch structure events */
-  gst_gl_display_update_attributes (display);
-
-  gst_gl_display_lock (display);
-  glViewport (0, 0, display->win_width, display->win_height);
-
-  glClearColor (0.3, 0.3, 0.3, 1.0);
-  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
-  glMatrixMode (GL_PROJECTION);
-  glLoadIdentity ();
-
-  glMatrixMode (GL_MODELVIEW);
-  glLoadIdentity ();
-
-  glDisable (GL_CULL_FACE);
-  glEnableClientState (GL_TEXTURE_COORD_ARRAY);
-
-  glColor4f (1, 1, 1, 1);
+  if (glimage_sink->is_gl) {
+    gl_buffer = GST_GL_BUFFER (gst_buffer_ref (buf));
 
-  glEnable (GL_TEXTURE_RECTANGLE_ARB);
-  glBindTexture (GL_TEXTURE_RECTANGLE_ARB, gl_buffer->texture);
-  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP);
-  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP);
-  glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+    if (glimage_sink->display == NULL) {
+      glimage_sink->display = g_object_ref (gl_buffer->display);
+      if (glimage_sink->window_id) {
+        gst_gl_display_set_window (glimage_sink->display,
+            glimage_sink->window_id);
+      }
+    } else {
+      g_assert (gl_buffer->display == glimage_sink->display);
+    }
+    display = gl_buffer->display;
 
-  glColor4f (1, 0, 1, 1);
+  } else {
+    if (glimage_sink->display == NULL) {
+      gboolean ret;
+
+      glimage_sink->display = gst_gl_display_new ();
+      ret = gst_gl_display_connect (glimage_sink->display, NULL);
+      if (!ret) {
+        g_object_unref (glimage_sink->display);
+        return GST_FLOW_ERROR;
+      }
+      if (glimage_sink->window_id) {
+        gst_gl_display_set_window (glimage_sink->display,
+            glimage_sink->window_id);
+      }
+      gst_gl_display_set_visible (glimage_sink->display, TRUE);
+    }
+    display = glimage_sink->display;
 
-  glBegin (GL_QUADS);
-  glNormal3f (0, 0, -1);
-  glTexCoord2f (gl_buffer->width, 0);
-  glVertex3f (1.0, 1.0, 0);
-  glTexCoord2f (0, 0);
-  glVertex3f (-1.0, 1.0, 0);
-  glTexCoord2f (0, gl_buffer->height);
-  glVertex3f (-1.0, -1.0, 0);
-  glTexCoord2f (gl_buffer->width, gl_buffer->height);
-  glVertex3f (1.0, -1.0, 0);
-  glEnd ();
+    gl_buffer = gst_gl_buffer_new_from_video_format (display,
+        glimage_sink->format, glimage_sink->width, glimage_sink->height);
+    gst_gl_buffer_upload (gl_buffer, glimage_sink->format,
+        GST_BUFFER_DATA (buf));
+  }
 
-  glXSwapBuffers (display->display, display->window);
+  gst_gl_display_draw_texture (display, gl_buffer->texture,
+      gl_buffer->width, gl_buffer->height);
 
-  gst_gl_display_unlock (display);
+  gst_buffer_unref (GST_BUFFER (gl_buffer));
 
   return GST_FLOW_OK;
 }
@@ -557,65 +532,3 @@ gst_glimage_sink_implements_init (GstImplementsInterfaceClass * klass)
 {
   klass->supported = gst_glimage_sink_interface_supported;
 }
-
-
-/*
- * helper functions
- */
-
-#if 0
-static void
-gst_caps_set_all (GstCaps * caps, char *field, ...)
-{
-  GstStructure *structure;
-  va_list var_args;
-  int i;
-
-  for (i = 0; i < gst_caps_get_size (caps); i++) {
-    structure = gst_caps_get_structure (caps, i);
-
-    va_start (var_args, field);
-    gst_structure_set_valist (structure, field, var_args);
-    va_end (var_args);
-  }
-}
-#endif
-
-#if 0
-static void
-gst_glimage_sink_update_caps (GstGLImageSink * glimage_sink)
-{
-  GstCaps *caps;
-  int max_size;
-
-  if (glimage_sink->display == NULL) {
-    caps = gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SINK_PAD
-            (glimage_sink)));
-    gst_caps_replace (&glimage_sink->caps, caps);
-    return;
-  }
-
-  caps =
-      gst_caps_from_string (GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx ";"
-      GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR);
-#ifdef GL_YCBCR_MESA
-  if (glimage_sink->display->have_ycbcr_texture) {
-    GstCaps *ycaps =
-        gst_caps_from_string (GST_VIDEO_CAPS_YUV ("{ AYUV, UYVY, YUY2 }"));
-    gst_caps_append (ycaps, caps);
-    caps = ycaps;
-  }
-#endif
-
-  max_size = glimage_sink->display->max_texture_size;
-  if (max_size == 0) {
-    max_size = 1024;
-  }
-
-  gst_caps_set_all (caps,
-      "width", GST_TYPE_INT_RANGE, 16, max_size,
-      "height", GST_TYPE_INT_RANGE, 16, max_size, NULL);
-
-  gst_caps_replace (&glimage_sink->caps, caps);
-}
-#endif
diff --git a/sys/glsink/glimagesink.h b/sys/glsink/glimagesink.h
index 3a5effe9..74ec3308 100644
--- a/sys/glsink/glimagesink.h
+++ b/sys/glsink/glimagesink.h
@@ -54,6 +54,9 @@ struct _GstGLImageSink
   /* caps */
   GstCaps *caps;
   GstVideoFormat format;
+  int width;
+  int height;
+  gboolean is_gl;
   int fps_n, fps_d;
   int par_n, par_d;
 
diff --git a/sys/glsink/gstgldisplay.c b/sys/glsink/gstgldisplay.c
index f0995c1b..d90e5e72 100644
--- a/sys/glsink/gstgldisplay.c
+++ b/sys/glsink/gstgldisplay.c
@@ -85,7 +85,7 @@ gst_gl_display_new (void)
   return g_object_new (GST_TYPE_GL_DISPLAY, NULL);
 }
 
-#define HANDLE_X_ERRORS
+//#define HANDLE_X_ERRORS
 #ifdef HANDLE_X_ERRORS
 static int
 x_error_handler (Display * display, XErrorEvent * event)
@@ -167,28 +167,11 @@ gst_gl_display_check_features (GstGLDisplay * display)
     GST_DEBUG ("No GLX extension");
     return FALSE;
   }
-#if 0
-  {
-    int i;
-    int n;
-
-    visinfo = XGetVisualInfo (display->display, 0, NULL, &n);
-    for (i = 0; i < n; i++) {
-      GST_ERROR ("%d: %d %ld", i, visinfo[i].depth, visinfo[i].visualid);
-      if (visinfo[i].depth == 32)
-        break;
-    }
-
-    visinfo += i;
-  }
-#endif
 
-  if (1) {
-    visinfo = glXChooseVisual (display->display, scrnum, attrib);
-    if (visinfo == NULL) {
-      GST_DEBUG ("No usable visual");
-      return FALSE;
-    }
+  visinfo = glXChooseVisual (display->display, scrnum, attrib);
+  if (visinfo == NULL) {
+    GST_DEBUG ("No usable visual");
+    return FALSE;
   }
 
   display->visinfo = visinfo;
@@ -204,7 +187,7 @@ gst_gl_display_check_features (GstGLDisplay * display)
 
   mask = CWBackPixel | CWBorderPixel | CWColormap | CWOverrideRedirect;
 
-  GST_ERROR ("creating window with visual %ld", visinfo->visualid);
+  GST_DEBUG ("creating window with visual %ld", visinfo->visualid);
 
   window = XCreateWindow (display->display, root, 0, 0,
       100, 100, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
@@ -331,7 +314,9 @@ gst_gl_display_init_tmp_window (GstGLDisplay * display)
       parent_window, 0, 0, width, height,
       0, display->visinfo->depth, InputOutput,
       display->visinfo->visual, mask, &attr);
-  XMapWindow (display->display, display->window);
+  if (display->visible) {
+    XMapWindow (display->display, display->window);
+  }
   XSync (display->display, FALSE);
 }
 
@@ -342,34 +327,31 @@ gst_gl_display_destroy_tmp_window (GstGLDisplay * display)
 }
 
 void
+gst_gl_display_set_visible (GstGLDisplay * display, gboolean visible)
+{
+  if (display->visible == visible)
+    return;
+  display->visible = visible;
+  if (display->visible) {
+    XMapWindow (display->display, display->window);
+  } else {
+    XUnmapWindow (display->display, display->window);
+  }
+  XSync (display->display, FALSE);
+}
+
+void
 gst_gl_display_set_window (GstGLDisplay * display, Window window)
 {
   g_mutex_lock (display->lock);
 
-#if 0
-  if (window != display->assigned_window) {
-    if (display->assigned_window == None) {
-      gst_gl_display_destroy_tmp_window (display);
-    }
-    display->assigned_window = window;
-    if (display->assigned_window == None) {
-      gst_gl_display_init_tmp_window (display);
-    } else {
-      display->window = window;
-    }
-  }
-#else
   if (window != display->parent_window) {
     gst_gl_display_destroy_tmp_window (display);
 
     display->parent_window = window;
 
     gst_gl_display_init_tmp_window (display);
-
-    //XReparentWindow (display->display, display->window,
-    //  display->assigned_window, 0, 0);
   }
-#endif
 
   g_mutex_unlock (display->lock);
 }
@@ -478,6 +460,7 @@ gst_gl_display_upload_texture_rectangle (GstGLDisplay * display,
 }
 
 
+#if 0
 static void
 draw_rect_texture (GstGLDisplay * display, GstVideoFormat type,
     void *data, int width, int height)
@@ -689,7 +672,9 @@ draw_pow2_texture (GstGLDisplay * display, GstVideoFormat type,
   glEnd ();
   glDeleteTextures (1, &texture);
 }
+#endif
 
+#if 0
 void
 gst_gl_display_draw_image (GstGLDisplay * display, GstVideoFormat type,
     void *data, int width, int height)
@@ -710,7 +695,7 @@ gst_gl_display_draw_image (GstGLDisplay * display, GstVideoFormat type,
 
     ret = glXGetSyncValuesOML (display->display, display->window,
         &ust, &mst, &sbc);
-    GST_DEBUG ("sync values %d %lld %lld %lld", ret, ust, mst, sbc);
+    GST_ERROR ("sync values %d %lld %lld %lld", ret, ust, mst, sbc);
   }
 #endif
 
@@ -763,17 +748,15 @@ gst_gl_display_draw_image (GstGLDisplay * display, GstVideoFormat type,
 
   gst_gl_display_unlock (display);
 }
+#endif
 
 void
-gst_gl_display_draw_rbo (GstGLDisplay * display, GLuint rbo,
+gst_gl_display_draw_texture (GstGLDisplay * display, GLuint texture,
     int width, int height)
 {
-  GLuint texture;
-  GLuint fbo;
-
   g_return_if_fail (width > 0);
   g_return_if_fail (height > 0);
-  g_return_if_fail (rbo != None);
+  g_return_if_fail (texture != None);
 
   gst_gl_display_lock (display);
 
@@ -781,103 +764,24 @@ gst_gl_display_draw_rbo (GstGLDisplay * display, GLuint rbo,
   g_assert (display->context != NULL);
 
   gst_gl_display_update_attributes (display);
-
-  glViewport (0, 0, display->win_width, display->win_height);
-
-  glClearColor (0.3, 0.3, 0.3, 1.0);
-  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
-  glMatrixMode (GL_PROJECTION);
-  glLoadIdentity ();
-
-  glMatrixMode (GL_MODELVIEW);
-  glLoadIdentity ();
-
-  glDisable (GL_CULL_FACE);
-  glEnableClientState (GL_TEXTURE_COORD_ARRAY);
-
-  glColor4f (1, 1, 1, 1);
-
-  glGenFramebuffersEXT (1, &fbo);
-  glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, fbo);
-
-  glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
-      GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, rbo);
-
-  glDrawBuffer (GL_COLOR_ATTACHMENT0_EXT);
-  glReadBuffer (GL_COLOR_ATTACHMENT0_EXT);
-
-  g_assert (glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT) ==
-      GL_FRAMEBUFFER_COMPLETE_EXT);
-
-#if 1
+#if 0
+  /* Doesn't work */
   {
-    void *buffer;
+    int64_t ust = 1234;
+    int64_t mst = 1234;
+    int64_t sbc = 1234;
+    gboolean ret;
 
-    buffer = malloc (320 * 240 * 4);
-    memset (buffer, random (), 320 * 240 * 4);
-    free (buffer);
+    ret = glXGetSyncValuesOML (display->display, display->window,
+        &ust, &mst, &sbc);
+    GST_ERROR ("sync values %d %lld %lld %lld", ret, ust, mst, sbc);
   }
 #endif
 
-  glEnable (GL_TEXTURE_RECTANGLE_ARB);
-  glGenTextures (1, &texture);
-  glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
-  glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGB, width, height, 0,
-      GL_RGB, GL_UNSIGNED_BYTE, NULL);
-  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP);
-  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP);
-  glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
-  glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
-      GL_TEXTURE_RECTANGLE_ARB, texture, 0);
-
-  glDrawBuffer (0);
-  glReadBuffer (0);
-  glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
-  glColor4f (1, 0, 1, 1);
-  gst_gl_display_check_error (display, __LINE__);
-//glBindTexture (GL_TEXTURE_RECTANGLE_ARB, 0);
-  glBegin (GL_QUADS);
-
-  glNormal3f (0, 0, -1);
-
-  glTexCoord2f (width, 0);
-  glVertex3f (0.9, 0.9, 0);
-  glTexCoord2f (0, 0);
-  glVertex3f (-0.9, 0.9, 0);
-  glTexCoord2f (0, height);
-  glVertex3f (-0.9, -0.9, 0);
-  glTexCoord2f (width, height);
-  glVertex3f (0.9, -0.9, 0);
-  glEnd ();
-  gst_gl_display_check_error (display, __LINE__);
-  glDeleteTextures (1, &texture);
-
-  glDeleteFramebuffersEXT (1, &fbo);
-  gst_gl_display_check_error (display, __LINE__);
-
-  glXSwapBuffers (display->display, display->window);
-
-  gst_gl_display_unlock (display);
-}
-
-void
-gst_gl_display_draw_texture (GstGLDisplay * display, GLuint texture,
-    int width, int height)
-{
-  g_return_if_fail (width > 0);
-  g_return_if_fail (height > 0);
-  g_return_if_fail (texture != None);
-
-  gst_gl_display_lock (display);
-
-  g_assert (display->window != None);
-  g_assert (display->context != NULL);
-
-  gst_gl_display_update_attributes (display);
+#if 1
+  /* Doesn't work */
+  glXSwapIntervalSGI (1);
+#endif
 
   glViewport (0, 0, display->win_width, display->win_height);
 
@@ -910,13 +814,13 @@ gst_gl_display_draw_texture (GstGLDisplay * display, GLuint texture,
   glNormal3f (0, 0, -1);
 
   glTexCoord2f (width, 0);
-  glVertex3f (0.9, 0.9, 0);
+  glVertex3f (1.0, 1.0, 0);
   glTexCoord2f (0, 0);
-  glVertex3f (-0.9, 0.9, 0);
+  glVertex3f (-1.0, 1.0, 0);
   glTexCoord2f (0, height);
-  glVertex3f (-0.9, -0.9, 0);
+  glVertex3f (-1.0, -1.0, 0);
   glTexCoord2f (width, height);
-  glVertex3f (0.9, -0.9, 0);
+  glVertex3f (1.0, -1.0, 0);
   glEnd ();
   gst_gl_display_check_error (display, __LINE__);
 
diff --git a/sys/glsink/gstgldisplay.h b/sys/glsink/gstgldisplay.h
index 907f2c8f..5886884d 100644
--- a/sys/glsink/gstgldisplay.h
+++ b/sys/glsink/gstgldisplay.h
@@ -46,7 +46,7 @@ struct _GstGLDisplay {
   gboolean have_color_matrix;
 
   Window window;
-  //Window assigned_window;
+  gboolean visible;
   Window parent_window;
 
   int win_width;
@@ -80,6 +80,7 @@ void gst_gl_display_draw_texture (GstGLDisplay * display, GLuint texture,
 void gst_gl_display_check_error (GstGLDisplay *display, int line);
 GLuint gst_gl_display_upload_texture_rectangle (GstGLDisplay *display,
     GstVideoFormat type, void *data, int width, int height);
+void gst_gl_display_set_visible (GstGLDisplay *display, gboolean visible);
 
 #endif
 
diff --git a/sys/glsink/gstopengl.c b/sys/glsink/gstopengl.c
index 7acbe1fd..6c73f4f4 100644
--- a/sys/glsink/gstopengl.c
+++ b/sys/glsink/gstopengl.c
@@ -46,7 +46,7 @@ plugin_init (GstPlugin * plugin)
       "glimagesink element");
 
   if (!gst_element_register (plugin, "glimagesink",
-          GST_RANK_MARGINAL, GST_TYPE_GLIMAGE_SINK)) {
+          GST_RANK_SECONDARY, GST_TYPE_GLIMAGE_SINK)) {
     return FALSE;
   }
   if (!gst_element_register (plugin, "glupload",