[WIP] [Wayland] Add support for fullscreen surface unredirect (direct scanout)

clutter/clutter/clutter-actor.c

@@ -20019,6 +20019,24 @@ clutter_actor_get_transition (ClutterActor *self,
   return clos->transition;
 }
 
+/**
+ * clutter_actor_has_transitions: (skip)
+ */
+
+gboolean
+clutter_actor_has_transitions (ClutterActor *self)
+{
+  const ClutterAnimationInfo *info;
+
+  g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
+
+  info = _clutter_actor_get_animation_info_or_defaults (self);
+  if (info->transitions == NULL)
+    return FALSE;
+
+  return g_hash_table_size (info->transitions) > 0;
+}
+
 /**
  * clutter_actor_save_easing_state:
  * @self: a #ClutterActor

clutter/clutter/clutter-muffin.h

@@ -75,9 +75,16 @@ void clutter_stage_thaw_updates (ClutterStage *stage);
 CLUTTER_EXPORT
 void clutter_stage_update_resource_scales (ClutterStage *stage);
 
+CLUTTER_EXPORT
+void clutter_stage_view_assign_next_scanout (ClutterStageView *stage_view,
+                                             CoglScanout      *scanout);
+
 CLUTTER_EXPORT
 gboolean clutter_actor_has_damage (ClutterActor *actor);
 
+CLUTTER_EXPORT
+gboolean clutter_actor_has_transitions (ClutterActor *actor);
+
 CLUTTER_EXPORT
 void clutter_stage_get_device_coords (ClutterStage         *stage,
                                       ClutterInputDevice   *device,

clutter/clutter/clutter-stage-view-private.h

@@ -43,4 +43,6 @@ const cairo_region_t * clutter_stage_view_peek_redraw_clip (ClutterStageView *vi
 
 cairo_region_t * clutter_stage_view_take_redraw_clip (ClutterStageView *view);
 
+CoglScanout * clutter_stage_view_take_scanout (ClutterStageView *view);
+
 #endif /* __CLUTTER_STAGE_VIEW_PRIVATE_H__ */

clutter/clutter/clutter-stage-view.c

@@ -24,6 +24,8 @@
 #include <math.h>
 
 #include "clutter/clutter-private.h"
+#include "clutter/clutter-muffin.h"
+#include "cogl/cogl.h"
 
 enum
 {
@@ -52,6 +54,8 @@ typedef struct _ClutterStageViewPrivate
   CoglOffscreen *shadowfb;
   CoglPipeline *shadowfb_pipeline;
 
+  CoglScanout *next_scanout;
+
   gboolean has_redraw_clip;
   cairo_region_t *redraw_clip;
 
@@ -407,6 +411,25 @@ clutter_stage_default_get_offscreen_transformation_matrix (ClutterStageView *vie
   cogl_matrix_init_identity (matrix);
 }
 
+void
+clutter_stage_view_assign_next_scanout (ClutterStageView *view,
+                                        CoglScanout      *scanout)
+{
+  ClutterStageViewPrivate *priv =
+    clutter_stage_view_get_instance_private (view);
+
+  g_set_object (&priv->next_scanout, scanout);
+}
+
+CoglScanout *
+clutter_stage_view_take_scanout (ClutterStageView *view)
+{
+  ClutterStageViewPrivate *priv =
+    clutter_stage_view_get_instance_private (view);
+
+  return g_steal_pointer (&priv->next_scanout);
+}
+
 static void
 clutter_stage_view_get_property (GObject    *object,
                                  guint       prop_id,

clutter/clutter/cogl/clutter-stage-cogl.c

@@ -989,6 +989,20 @@ clutter_stage_cogl_redraw_view (ClutterStageWindow *stage_window,
     }
 }
 
+static void
+clutter_stage_cogl_scanout_view (ClutterStageCogl *stage_cogl,
+                                 ClutterStageView *view,
+                                 CoglScanout      *scanout)
+{
+  CoglFramebuffer *framebuffer = clutter_stage_view_get_framebuffer (view);
+  CoglOnscreen *onscreen;
+
+  g_return_if_fail (cogl_is_onscreen (framebuffer));
+
+  onscreen = COGL_ONSCREEN (framebuffer);
+  cogl_onscreen_direct_scanout (onscreen, scanout);
+}
+
 static void
 clutter_stage_cogl_redraw (ClutterStageWindow *stage_window)
 {
@@ -1016,10 +1030,24 @@ clutter_stage_cogl_redraw (ClutterStageWindow *stage_window)
   for (l = _clutter_stage_window_get_views (stage_window); l; l = l->next)
     {
       ClutterStageView *view = l->data;
+      g_autoptr (CoglScanout) scanout = NULL;
 
       if (!clutter_stage_view_has_redraw_clip (view))
         continue;
 
+      scanout = clutter_stage_view_take_scanout (view);
+      if (scanout)
+        {
+          clutter_stage_cogl_scanout_view (stage_cogl,
+                                           view,
+                                           scanout);
+          swap_event = TRUE;
+        }
+      else
+        {
+          swap_event |= clutter_stage_cogl_redraw_view (stage_window, view);
+        }
+
       swap_event |= clutter_stage_cogl_redraw_view (stage_window, view);
     }
 

cogl/cogl/cogl-onscreen.c

@@ -405,6 +405,27 @@ cogl_onscreen_get_buffer_age (CoglOnscreen *onscreen)
   return winsys->onscreen_get_buffer_age (onscreen);
 }
 
+void
+cogl_onscreen_direct_scanout (CoglOnscreen *onscreen,
+                              CoglScanout  *scanout)
+{
+  CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
+  const CoglWinsysVtable *winsys;
+  CoglFrameInfo *info;
+
+  g_return_if_fail (framebuffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN);
+  g_return_if_fail (_cogl_winsys_has_feature (COGL_WINSYS_FEATURE_SYNC_AND_COMPLETE_EVENT));
+
+  info = _cogl_frame_info_new ();
+  info->frame_counter = onscreen->frame_counter;
+  g_queue_push_tail (&onscreen->pending_frame_infos, info);
+
+  winsys = _cogl_framebuffer_get_winsys (framebuffer);
+  winsys->onscreen_direct_scanout (onscreen, scanout);
+
+  onscreen->frame_counter++;
+}
+
 #ifdef COGL_HAS_X11_SUPPORT
 uint32_t
 cogl_x11_onscreen_get_window_xid (CoglOnscreen *onscreen)

cogl/cogl/cogl-onscreen.h

@@ -50,6 +50,8 @@ G_BEGIN_DECLS
 typedef struct _CoglOnscreen CoglOnscreen;
 #define COGL_ONSCREEN(X) ((CoglOnscreen *)(X))
 
+typedef struct _CoglScanout CoglScanout;
+
 /**
  * cogl_onscreen_get_gtype:
  *
@@ -284,6 +286,13 @@ cogl_onscreen_swap_buffers_with_damage (CoglOnscreen *onscreen,
                                         const int *rectangles,
                                         int n_rectangles);
 
+/**
+ * cogl_onscreen_direct_scanout: (skip)
+ */
+COGL_EXPORT void
+cogl_onscreen_direct_scanout (CoglOnscreen *onscreen,
+                              CoglScanout  *scanout);
+
 /**
  * cogl_onscreen_swap_region:
  * @onscreen: A #CoglOnscreen framebuffer

cogl/cogl/cogl-scanout.c

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2019 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cogl-config.h"
+
+#include "cogl-scanout.h"
+
+G_DEFINE_INTERFACE (CoglScanout, cogl_scanout, G_TYPE_OBJECT)
+
+static void
+cogl_scanout_default_init (CoglScanoutInterface *iface)
+{
+}

cogl/cogl/cogl-scanout.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2019 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef COGL_SCANOUT_H
+#define COGL_SCANOUT_H
+
+#include "cogl/cogl-types.h"
+
+#include <glib-object.h>
+
+#define COGL_TYPE_SCANOUT (cogl_scanout_get_type ())
+COGL_EXPORT
+G_DECLARE_INTERFACE (CoglScanout, cogl_scanout,
+                     COGL, SCANOUT, GObject)
+
+struct _CoglScanoutInterface
+{
+    GTypeInterface parent_iface;
+};
+
+#endif /* COGL_SCANOUT_H */

cogl/cogl/cogl.h

@@ -122,6 +122,7 @@
 #include <cogl/cogl-fence.h>
 #include <cogl/cogl-glib-source.h>
 #include <cogl/cogl-trace.h>
+#include <cogl/cogl-scanout.h>
 /* XXX: This will definitly go away once all the Clutter winsys
  * code has been migrated down into Cogl! */
 #include <cogl/deprecated/cogl-clutter.h>

cogl/cogl/meson.build

@@ -122,6 +122,7 @@ cogl_nonintrospected_headers = [
   'cogl-version.h',
   'cogl-gtype-private.h',
   'cogl-glib-source.h',
+  'cogl-scanout.h',
 ]
 
 cogl_nodist_headers = [
@@ -347,6 +348,7 @@ cogl_sources = [
   'cogl-closure-list.c',
   'cogl-fence.c',
   'cogl-fence-private.h',
+  'cogl-scanout.c',
   'deprecated/cogl-material-compat.c',
   'deprecated/cogl-program.c',
   'deprecated/cogl-program-private.h',

cogl/cogl/winsys/cogl-winsys-private.h

@@ -33,6 +33,7 @@
 
 #include "cogl-renderer.h"
 #include "cogl-onscreen.h"
+#include "cogl-scanout.h"
 
 #ifdef COGL_HAS_XLIB_SUPPORT
 #include "cogl-texture-pixmap-x11-private.h"
@@ -117,6 +118,10 @@ typedef struct _CoglWinsysVtable
                                         const int *rectangles,
                                         int n_rectangles);
 
+  void
+  (*onscreen_direct_scanout) (CoglOnscreen *onscreen,
+                              CoglScanout  *scanout);
+
   void
   (*onscreen_set_visibility) (CoglOnscreen *onscreen,
                               gboolean visibility);