From d0ad5ea18bb02112837bcdf7270d58d8ad235a4d Mon Sep 17 00:00:00 2001
From: "Owen W. Taylor" <otaylor@fishsoup.net>
Date: Thu, 8 May 2014 18:44:15 -0400
Subject: [PATCH] Add support for quad-buffer stereo
Track the stereo status of windows using the new EXT_stereo_tree
GLX extension.
When stereo is enabled or disabled, a restart is triggered via
meta_restart() after a timeout, setting a _META_ENABLE_STEREO
property on the root window to indicate whether we should
turn on a stereo stage for clutter. The property avoids a loop,
since we need to enable stereo *before* initializing Clutter and GL,
but we need GL to figure out whether we have stereo windows.
Stereo windows are drawn to the stage using new functionality
in Cogl to setup a stereo context, select which buffer to draw
to, and draw either the left or right buffer of a stereo
texture_from_pixmap.
---
src/compositor/compositor-private.h | 9 ++
src/compositor/compositor.c | 125 +++++++++++++++
src/compositor/meta-shaped-texture-private.h | 5 +-
src/compositor/meta-shaped-texture.c | 84 +++++++++-
src/compositor/meta-surface-actor-wayland.c | 2 +-
src/compositor/meta-surface-actor-x11.c | 54 ++++++-
src/compositor/meta-surface-actor-x11.h | 5 +
src/compositor/meta-window-actor-private.h | 5 +
src/compositor/meta-window-actor.c | 22 +++
src/core/main.c | 4 +
src/core/stereo.c | 154 +++++++++++++++++++
src/core/stereo.h | 28 ++++
src/meson.build | 2 +
src/wayland/meta-wayland-surface.c | 2 +-
14 files changed, 481 insertions(+), 20 deletions(-)
create mode 100644 src/core/stereo.c
create mode 100644 src/core/stereo.h
diff --git a/src/compositor/compositor-private.h b/src/compositor/compositor-private.h
index 6ab33416c..f70087512 100644
--- a/src/compositor/compositor-private.h
+++ b/src/compositor/compositor-private.h
@@ -24,6 +24,10 @@ struct _MetaCompositor
gint64 server_time_query_time;
gint64 server_time_offset;
+ int glx_opcode;
+ guint stereo_tree_ext : 1;
+ guint have_stereo_windows : 1;
+
guint server_time_is_monotonic_time : 1;
ClutterActor *stage, *window_group, *top_window_group, *feedback_group;
@@ -63,6 +67,11 @@ void meta_end_modal_for_plugin (MetaCompositor *compositor,
gint64 meta_compositor_monotonic_time_to_server_time (MetaDisplay *display,
gint64 monotonic_time);
+gboolean meta_compositor_window_is_stereo (MetaDisplay *display,
+ Window xwindow);
+void meta_compositor_select_stereo_notify (MetaDisplay *display,
+ Window xwindow);
+
void meta_compositor_flash_window (MetaCompositor *compositor,
MetaWindow *window);
diff --git a/src/compositor/compositor.c b/src/compositor/compositor.c
index 2a2c8fb3b..6c08c8fe4 100644
--- a/src/compositor/compositor.c
+++ b/src/compositor/compositor.c
@@ -69,6 +69,8 @@
#include "core/core.h"
#include "core/display-private.h"
#include "core/frame.h"
+#include "core/stack-tracker.h"
+#include "core/stereo.h"
#include "core/util-private.h"
#include "core/window-private.h"
#include "meta/compositor-mutter.h"
@@ -514,6 +516,94 @@ redirect_windows (MetaX11Display *x11_display)
}
}
+#define GLX_STEREO_TREE_EXT 0x20F5
+#define GLX_STEREO_NOTIFY_MASK_EXT 0x00000001
+#define GLX_STEREO_NOTIFY_EXT 0x00000000
+
+typedef struct {
+ int type;
+ unsigned long serial;
+ Bool send_event;
+ Display *display;
+ int extension;
+ int evtype;
+ Drawable window;
+ Bool stereo_tree;
+} StereoNotifyEvent;
+
+static gboolean
+display_has_stereo_tree_ext (MetaX11Display *x11_display)
+{
+ Display *xdisplay = x11_display->xdisplay;
+ const char *extensions_string;
+
+ static const char * (*query_extensions_string) (Display *display,
+ int screen);
+
+ if (query_extensions_string == NULL)
+ query_extensions_string =
+ (const char * (*) (Display *, int))
+ cogl_get_proc_address ("glXQueryExtensionsString");
+
+ extensions_string = query_extensions_string (xdisplay,
+ meta_x11_display_get_screen_number (x11_display));
+
+ return extensions_string && strstr (extensions_string, "EXT_stereo_tree") != 0;
+}
+
+#include <GL/gl.h>
+
+gboolean
+meta_compositor_window_is_stereo (MetaDisplay *display,
+ Window xwindow)
+{
+ MetaCompositor *compositor = get_compositor_for_display (display);
+ Display *xdisplay = meta_x11_display_get_xdisplay (display->x11_display);
+
+ static int (*query_drawable) (Display *dpy,
+ Drawable draw,
+ int attribute,
+ unsigned int *value);
+
+ if (compositor->stereo_tree_ext)
+ {
+ unsigned int stereo_tree = 0;
+
+ if (query_drawable == NULL)
+ query_drawable =
+ (int (*) (Display *, Drawable, int, unsigned int *))
+ cogl_get_proc_address ("glXQueryDrawable");
+
+ query_drawable (xdisplay, xwindow, GLX_STEREO_TREE_EXT, &stereo_tree);
+
+ return stereo_tree != 0;
+ }
+ else
+ return FALSE;
+}
+
+void
+meta_compositor_select_stereo_notify (MetaDisplay *display,
+ Window xwindow)
+{
+ MetaCompositor *compositor = get_compositor_for_display (display);
+ Display *xdisplay = meta_x11_display_get_xdisplay (display->x11_display);
+
+ static void (*select_event) (Display *dpy,
+ Drawable draw,
+ unsigned long event_mask);
+
+ if (compositor->stereo_tree_ext)
+ {
+ if (select_event == NULL)
+ select_event =
+ (void (*) (Display *, Drawable, unsigned long))
+ cogl_get_proc_address ("glXSelectEvent");
+
+ select_event (xdisplay, xwindow, GLX_STEREO_NOTIFY_MASK_EXT);
+ }
+}
+
void
meta_compositor_manage (MetaCompositor *compositor)
{
@@ -525,6 +615,8 @@ meta_compositor_manage (MetaCompositor *compositor)
{
xdisplay = display->x11_display->xdisplay;
meta_x11_display_set_cm_selection (display->x11_display);
+
+ compositor->stereo_tree_ext = display_has_stereo_tree_ext (display->x11_display);
}
compositor->stage = meta_backend_get_stage (backend);
@@ -822,6 +914,23 @@ meta_compositor_process_event (MetaCompositor *compositor,
if (window)
process_damage (compositor, (XDamageNotifyEvent *) event, window);
}
+ else if (!meta_is_wayland_compositor () &&
+ event->type == GenericEvent &&
+ event->xcookie.extension == compositor->glx_opcode)
+ {
+ if (event->xcookie.evtype == GLX_STEREO_NOTIFY_EXT)
+ {
+ StereoNotifyEvent *stereo_event = (StereoNotifyEvent *)(event->xcookie.data);
+ window = meta_x11_display_lookup_x_window (x11_display, stereo_event->window);
+
+ if (window != NULL)
+ {
+ MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window));
+ meta_window_actor_stereo_notify (window_actor, stereo_event->stereo_tree);
+ meta_stack_tracker_queue_sync_stack (window->display->stack_tracker);
+ }
+ }
+ }
if (compositor->have_x11_sync_object)
meta_sync_ring_handle_event (event);
@@ -1038,6 +1147,7 @@ meta_compositor_sync_stack (MetaCompositor *compositor,
GList *stack)
{
GList *old_stack;
+ int stereo_window_count = 0;
/* This is painful because hidden windows that we are in the process
* of animating out of existence. They'll be at the bottom of the
@@ -1113,6 +1223,8 @@ meta_compositor_sync_stack (MetaCompositor *compositor,
* near the front of the other.)
*/
compositor->windows = g_list_prepend (compositor->windows, actor);
+ if (meta_window_actor_is_stereo (actor))
+ stereo_window_count++;
stack = g_list_remove (stack, window);
old_stack = g_list_remove (old_stack, actor);
@@ -1120,6 +1232,8 @@ meta_compositor_sync_stack (MetaCompositor *compositor,
sync_actor_stacking (compositor);
+ meta_stereo_set_have_stereo_windows (stereo_window_count > 0);
+
if (compositor->top_window_actor)
g_signal_handlers_disconnect_by_func (compositor->top_window_actor,
on_top_window_actor_destroyed,
@@ -1325,6 +1439,17 @@ meta_compositor_new (MetaDisplay *display)
meta_post_paint_func,
compositor,
NULL);
+ if (!meta_is_wayland_compositor ())
+ {
+ Display *xdisplay = meta_x11_display_get_xdisplay (display->x11_display);
+ int glx_major_opcode, glx_first_event, glx_first_error;
+
+ if (XQueryExtension (xdisplay,
+ "GLX",
+ &glx_major_opcode, &glx_first_event, &glx_first_error))
+ compositor->glx_opcode = glx_major_opcode;
+ }
+
return compositor;
}
diff --git a/src/compositor/meta-shaped-texture-private.h b/src/compositor/meta-shaped-texture-private.h
index a86a2bff0..d0efdd4dc 100644
--- a/src/compositor/meta-shaped-texture-private.h
+++ b/src/compositor/meta-shaped-texture-private.h
@@ -31,8 +31,9 @@
#include "meta/meta-shaped-texture.h"
ClutterActor *meta_shaped_texture_new (void);
-void meta_shaped_texture_set_texture (MetaShapedTexture *stex,
- CoglTexture *texture);
+void meta_shaped_texture_set_textures (MetaShapedTexture *stex,
+ CoglTexture *texture,
+ CoglTexture *texture_right);
void meta_shaped_texture_set_is_y_inverted (MetaShapedTexture *stex,
gboolean is_y_inverted);
void meta_shaped_texture_set_snippet (MetaShapedTexture *stex,
diff --git a/src/compositor/meta-shaped-texture.c b/src/compositor/meta-shaped-texture.c
index ea8daa03d..9a00ccd6d 100644
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -102,8 +102,10 @@ struct _MetaShapedTexture
ClutterActor parent;
MetaTextureTower *paint_tower;
+ MetaTextureTower *paint_tower_right;
CoglTexture *texture;
+ CoglTexture *texture_right;
CoglTexture *mask_texture;
CoglSnippet *snippet;
@@ -192,6 +194,7 @@ meta_shaped_texture_init (MetaShapedTexture *stex)
clutter_backend_get_cogl_context (clutter_backend);
stex->paint_tower = meta_texture_tower_new ();
+ stex->paint_tower_right = NULL; /* demand create */
stex->texture = NULL;
stex->mask_texture = NULL;
@@ -335,6 +338,9 @@ meta_shaped_texture_dispose (GObject *object)
meta_texture_tower_free (stex->paint_tower);
stex->paint_tower = NULL;
+ g_clear_pointer (&stex->paint_tower, meta_texture_tower_free);
+ g_clear_pointer (&stex->paint_tower_right, meta_texture_tower_free);
+
g_clear_pointer (&stex->texture, cogl_object_unref);
g_clear_pointer (&stex->opaque_region, cairo_region_destroy);
@@ -611,8 +617,9 @@ paint_clipped_rectangle (MetaShapedTexture *stex,
}
static void
-set_cogl_texture (MetaShapedTexture *stex,
- CoglTexture *cogl_tex)
+set_cogl_textures (MetaShapedTexture *stex,
+ CoglTexture *cogl_tex,
+ CoglTexture *cogl_tex_right)
{
int width, height;
@@ -620,10 +627,13 @@ set_cogl_texture (MetaShapedTexture *stex,
if (stex->texture)
cogl_object_unref (stex->texture);
+ if (stex->texture_right)
+ cogl_object_unref (stex->texture_right);
g_clear_pointer (&stex->saved_base_surface, cairo_surface_destroy);
stex->texture = cogl_tex;
+ stex->texture_right = cogl_tex_right;
if (cogl_tex != NULL)
{
@@ -637,6 +647,9 @@ set_cogl_texture (MetaShapedTexture *stex,
height = 0;
}
+ if (cogl_tex_right != NULL)
+ cogl_object_ref (cogl_tex_right);
+
if (stex->tex_width != width ||
stex->tex_height != height)
{
@@ -650,8 +663,23 @@ set_cogl_texture (MetaShapedTexture *stex,
* previous buffer. We only queue a redraw in response to surface
* damage. */
+ if (cogl_tex_right != NULL)
+ {
+ if (stex->paint_tower_right == NULL)
+ stex->paint_tower_right = meta_texture_tower_new ();
+ }
+ else
+ {
+ g_clear_pointer (&stex->paint_tower_right, meta_texture_tower_free);
+ }
+
if (stex->create_mipmaps)
- meta_texture_tower_set_base_texture (stex->paint_tower, cogl_tex);
+ {
+ meta_texture_tower_set_base_texture (stex->paint_tower, cogl_tex);
+
+ if (stex->paint_tower_right)
+ meta_texture_tower_set_base_texture (stex->paint_tower_right, cogl_tex_right);
+ }
}
static gboolean
@@ -927,7 +955,9 @@ meta_shaped_texture_paint (ClutterActor *actor)
{
MetaShapedTexture *stex = META_SHAPED_TEXTURE (actor);
CoglTexture *paint_tex;
+ CoglTexture *paint_tex_right = NULL;
CoglFramebuffer *fb;
+ gboolean stereo;
if (!stex->texture)
return;
@@ -989,7 +1019,32 @@ meta_shaped_texture_paint (ClutterActor *actor)
return;
fb = cogl_get_draw_framebuffer ();
- do_paint (META_SHAPED_TEXTURE (actor), fb, paint_tex, stex->clip_region);
+
+ stereo = stex->texture_right && cogl_framebuffer_get_is_stereo (fb);
+
+ if (stereo)
+ {
+ if (stex->create_mipmaps)
+ paint_tex_right = meta_texture_tower_get_paint_texture (stex->paint_tower_right);
+
+ if (!paint_tex_right)
+ paint_tex_right = COGL_TEXTURE (stex->texture_right);
+ }
+ else
+ paint_tex_right = NULL;
+
+ if (stereo)
+ cogl_framebuffer_set_stereo_mode (fb, COGL_STEREO_LEFT);
+ do_paint (stex, fb, paint_tex, stex->clip_region);
+ if (stereo)
+ cogl_framebuffer_set_stereo_mode (fb, COGL_STEREO_BOTH);
+
+ if (paint_tex_right != NULL)
+ {
+ cogl_framebuffer_set_stereo_mode (fb, COGL_STEREO_RIGHT);
+ do_paint (stex, fb, paint_tex_right, stex->clip_region);
+ cogl_framebuffer_set_stereo_mode (fb, COGL_STEREO_BOTH);
+ }
}
static void
@@ -1063,6 +1118,12 @@ meta_shaped_texture_set_create_mipmaps (MetaShapedTexture *stex,
stex->create_mipmaps = create_mipmaps;
base_texture = create_mipmaps ? stex->texture : NULL;
meta_texture_tower_set_base_texture (stex->paint_tower, base_texture);
+
+ if (stex->paint_tower_right)
+ {
+ base_texture = create_mipmaps ? stex->texture_right : NULL;
+ meta_texture_tower_set_base_texture (stex->paint_tower_right, base_texture);
+ }
}
}
@@ -1256,6 +1317,12 @@ meta_shaped_texture_update_area (MetaShapedTexture *stex,
clip.y,
clip.width,
clip.height);
+ if (stex->paint_tower_right)
+ meta_texture_tower_update_area (stex->paint_tower_right,
+ clip.x,
+ clip.y,
+ clip.width,
+ clip.height);
stex->prev_invalidation = stex->last_invalidation;
stex->last_invalidation = g_get_monotonic_time ();
@@ -1302,17 +1369,18 @@ meta_shaped_texture_update_area (MetaShapedTexture *stex,
}
/**
- * meta_shaped_texture_set_texture:
+ * meta_shaped_texture_set_textures:
* @stex: The #MetaShapedTexture
* @pixmap: The #CoglTexture to display
*/
void
-meta_shaped_texture_set_texture (MetaShapedTexture *stex,
- CoglTexture *texture)
+meta_shaped_texture_set_textures (MetaShapedTexture *stex,
+ CoglTexture *texture,
+ CoglTexture *texture_right)
{
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
- set_cogl_texture (stex, texture);
+ set_cogl_textures (stex, texture, texture_right);
}
/**
diff --git a/src/compositor/meta-surface-actor-wayland.c b/src/compositor/meta-surface-actor-wayland.c
index f8d6c32b7..a75c4dd09 100644
--- a/src/compositor/meta-surface-actor-wayland.c
+++ b/src/compositor/meta-surface-actor-wayland.c
@@ -182,7 +182,7 @@ meta_surface_actor_wayland_dispose (GObject *object)
MetaShapedTexture *stex =
meta_surface_actor_get_texture (META_SURFACE_ACTOR (self));
- meta_shaped_texture_set_texture (stex, NULL);
+ meta_shaped_texture_set_textures (stex, NULL, NULL);
if (self->surface)
{
g_object_remove_weak_pointer (G_OBJECT (self->surface),
diff --git a/src/compositor/meta-surface-actor-x11.c b/src/compositor/meta-surface-actor-x11.c
index 244b1e885..3cd164d77 100644
--- a/src/compositor/meta-surface-actor-x11.c
+++ b/src/compositor/meta-surface-actor-x11.c
@@ -32,6 +32,7 @@
#include "cogl/winsys/cogl-texture-pixmap-x11.h"
#include "compositor/meta-cullable.h"
#include "compositor/meta-shaped-texture-private.h"
+#include "compositor-private.h"
#include "core/window-private.h"
#include "meta/meta-x11-errors.h"
#include "x11/meta-x11-display-private.h"
@@ -46,6 +47,7 @@ struct _MetaSurfaceActorX11
MetaDisplay *display;
CoglTexture *texture;
+ CoglTexture *texture_right;
Pixmap pixmap;
Damage damage;
@@ -61,6 +63,8 @@ struct _MetaSurfaceActorX11
guint size_changed : 1;
guint unredirected : 1;
+
+ guint stereo : 1;
};
G_DEFINE_TYPE (MetaSurfaceActorX11,
@@ -96,7 +100,7 @@ detach_pixmap (MetaSurfaceActorX11 *self)
* you are supposed to be able to free a GLXPixmap after freeing the underlying
* pixmap, but it certainly doesn't work with current DRI/Mesa
*/
- meta_shaped_texture_set_texture (stex, NULL);
+ meta_shaped_texture_set_textures (stex, NULL, NULL);
cogl_flush ();
meta_x11_error_trap_push (display->x11_display);
@@ -105,6 +109,7 @@ detach_pixmap (MetaSurfaceActorX11 *self)
meta_x11_error_trap_pop (display->x11_display);
g_clear_pointer (&self->texture, cogl_object_unref);
+ g_clear_pointer (&self->texture_right, cogl_object_unref);
}
static void
@@ -114,23 +119,37 @@ set_pixmap (MetaSurfaceActorX11 *self,
CoglContext *ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
MetaShapedTexture *stex = meta_surface_actor_get_texture (META_SURFACE_ACTOR (self));
CoglError *error = NULL;
- CoglTexture *texture;
+ CoglTexturePixmapX11 *texture;
+ CoglTexturePixmapX11 *texture_right;
g_assert (self->pixmap == None);
self->pixmap = pixmap;
- texture = COGL_TEXTURE (cogl_texture_pixmap_x11_new (ctx, self->pixmap, FALSE, &error));
+ if (self->stereo)
+ texture = cogl_texture_pixmap_x11_new_left (ctx, pixmap, FALSE, &error);
+ else
+ texture = cogl_texture_pixmap_x11_new (ctx, pixmap, FALSE, &error);
+
+ if (self->stereo)
+ texture_right = cogl_texture_pixmap_x11_new_right (texture);
+ else
+ texture_right = NULL;
if (error != NULL)
{
g_warning ("Failed to allocate stex texture: %s", error->message);
cogl_error_free (error);
}
- else if (G_UNLIKELY (!cogl_texture_pixmap_x11_is_using_tfp_extension (COGL_TEXTURE_PIXMAP_X11 (texture))))
+ else if (G_UNLIKELY (!cogl_texture_pixmap_x11_is_using_tfp_extension (texture)))
g_warning ("NOTE: Not using GLX TFP!\n");
- self->texture = texture;
- meta_shaped_texture_set_texture (stex, texture);
+ self->texture = COGL_TEXTURE (texture);
+ if (self->stereo)
+ self->texture_right = COGL_TEXTURE (texture_right);
+
+ meta_shaped_texture_set_textures (stex,
+ COGL_TEXTURE (texture),
+ COGL_TEXTURE (texture_right));;
}
static void
@@ -419,8 +438,8 @@ reset_texture (MetaSurfaceActorX11 *self)
/* Setting the texture to NULL will cause all the FBO's cached by the
* shaped texture's MetaTextureTower to be discarded and recreated.
*/
- meta_shaped_texture_set_texture (stex, NULL);
- meta_shaped_texture_set_texture (stex, self->texture);
+ meta_shaped_texture_set_textures (stex, NULL, NULL);
+ meta_shaped_texture_set_textures (stex, self->texture, self->texture_right);
}
MetaSurfaceActor *
@@ -428,12 +447,17 @@ meta_surface_actor_x11_new (MetaWindow *window)
{
MetaSurfaceActorX11 *self = g_object_new (META_TYPE_SURFACE_ACTOR_X11, NULL);
MetaDisplay *display = meta_window_get_display (window);
+ Window xwindow;
g_assert (!meta_is_wayland_compositor ());
self->window = window;
self->display = display;
+ xwindow = meta_window_x11_get_toplevel_xwindow (window);
+ self->stereo = meta_compositor_window_is_stereo (display, xwindow);
+ meta_compositor_select_stereo_notify (display, xwindow);
+
g_signal_connect_object (self->display, "gl-video-memory-purged",
G_CALLBACK (reset_texture), self, G_CONNECT_SWAPPED);
@@ -463,3 +487,17 @@ meta_surface_actor_x11_set_size (MetaSurfaceActorX11 *self,
self->last_height = height;
meta_shaped_texture_set_fallback_size (stex, width, height);
}
+
+void
+meta_surface_actor_x11_stereo_notify (MetaSurfaceActorX11 *self,
+ gboolean stereo_tree)
+{
+ self->stereo = stereo_tree != FALSE;
+ detach_pixmap (self);
+}
+
+gboolean
+meta_surface_actor_x11_is_stereo (MetaSurfaceActorX11 *self)
+{
+ return self->stereo;
+}
diff --git a/src/compositor/meta-surface-actor-x11.h b/src/compositor/meta-surface-actor-x11.h
index 2c4ed4dd6..3bdd5fdb0 100644
--- a/src/compositor/meta-surface-actor-x11.h
+++ b/src/compositor/meta-surface-actor-x11.h
@@ -47,6 +47,11 @@ MetaSurfaceActor * meta_surface_actor_x11_new (MetaWindow *window);
void meta_surface_actor_x11_set_size (MetaSurfaceActorX11 *self,
int width, int height);
+void meta_surface_actor_x11_stereo_notify (MetaSurfaceActorX11 *self,
+ gboolean stereo_tree);
+
+gboolean meta_surface_actor_x11_is_stereo (MetaSurfaceActorX11 *self);
+
G_END_DECLS
#endif /* __META_SURFACE_ACTOR_X11_H__ */
diff --git a/src/compositor/meta-window-actor-private.h b/src/compositor/meta-window-actor-private.h
index 6333f43db..9c1c12d09 100644
--- a/src/compositor/meta-window-actor-private.h
+++ b/src/compositor/meta-window-actor-private.h
@@ -76,4 +76,9 @@ MetaSurfaceActor *meta_window_actor_get_surface (MetaWindowActor *self);
void meta_window_actor_update_surface (MetaWindowActor *self);
MetaWindowActor *meta_window_actor_from_window (MetaWindow *window);
+void meta_window_actor_stereo_notify (MetaWindowActor *actor,
+ gboolean stereo_tree);
+
+gboolean meta_window_actor_is_stereo (MetaWindowActor *actor);
+
#endif /* META_WINDOW_ACTOR_PRIVATE_H */
diff --git a/src/compositor/meta-window-actor.c b/src/compositor/meta-window-actor.c
index 1c8dc8fe5..11686d00b 100644
--- a/src/compositor/meta-window-actor.c
+++ b/src/compositor/meta-window-actor.c
@@ -2031,3 +2031,25 @@ screen_cast_window_iface_init (MetaScreenCastWindowInterface *iface)
iface->capture_into = meta_window_actor_capture_into;
iface->has_damage = meta_window_actor_has_damage;
}
+
+void
+meta_window_actor_stereo_notify (MetaWindowActor *self,
+ gboolean stereo_tree)
+{
+ MetaWindowActorPrivate *priv = meta_window_actor_get_instance_private (self);
+
+ if (META_IS_SURFACE_ACTOR_X11 (priv->surface))
+ meta_surface_actor_x11_stereo_notify (META_SURFACE_ACTOR_X11 (priv->surface),
+ stereo_tree);
+}
+
+gboolean
+meta_window_actor_is_stereo (MetaWindowActor *self)
+{
+ MetaWindowActorPrivate *priv = meta_window_actor_get_instance_private (self);
+
+ if (META_IS_SURFACE_ACTOR_X11 (priv->surface))
+ return meta_surface_actor_x11_is_stereo (META_SURFACE_ACTOR_X11 (priv->surface));
+ else
+ return FALSE;
+}
diff --git a/src/core/main.c b/src/core/main.c
index e8464720f..629f8e94e 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -81,6 +81,7 @@
#include "meta/meta-backend.h"
#include "meta/meta-x11-errors.h"
#include "meta/prefs.h"
+#include "stereo.h"
#include "ui/ui.h"
#include "x11/session.h"
@@ -589,6 +590,9 @@ meta_init (void)
meta_init_backend (backend_gtype);
+ if (!meta_is_wayland_compositor ())
+ meta_stereo_init ();
+
meta_clutter_init ();
#ifdef HAVE_WAYLAND
diff --git a/src/core/stereo.c b/src/core/stereo.c
new file mode 100644
index 000000000..817056527
--- /dev/null
+++ b/src/core/stereo.c
@@ -0,0 +1,154 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2014 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * SECTION:stereo
+ * @short_description: Keep track of whether we are a stereo compositor
+ *
+ * With GLX, we need to use a different GL context for stereo and
+ * non-stereo support. Support for multiple GL contexts is unfinished
+ * in Cogl and entirely lacking in Clutter, so it's by far easier
+ * to just restart Mutter when we detect a stereo window.
+ *
+ * A property _MUTTER_ENABLE_STEREO is maintained on the root window
+ * to know whether we should initialize clutter for stereo or not.
+ * When the presence or absence of stereo windows mismatches the
+ * stereo-enabled state for a sufficiently long period of time,
+ * we restart Mutter.
+ */
+
+#include <config.h>
+
+#include <clutter/x11/clutter-x11.h>
+#include <gio/gunixinputstream.h>
+#include <X11/Xatom.h>
+
+#include "display-private.h"
+#include <meta/main.h>
+#include <meta/meta-x11-display.h>
+#include <meta/util.h>
+#include "stereo.h"
+#include "ui/ui.h"
+#include "util-private.h"
+
+static guint stereo_switch_id = 0;
+static gboolean stereo_enabled = FALSE;
+/* -1 so the first time meta_stereo_set_have_stereo_windows() is called
+ * we avoid the short-circuit and set up a timeout to restart
+ * if necessary */
+static gboolean stereo_have_windows = (gboolean)-1;
+static gboolean stereo_restart = FALSE;
+
+#define STEREO_ENABLE_WAIT 1000
+#define STEREO_DISABLE_WAIT 5000
+
+void
+meta_stereo_init (void)
+{
+ Display *xdisplay;
+ Window root;
+ Atom atom_enable_stereo;
+ Atom type;
+ int format;
+ unsigned long n_items, bytes_after;
+ guchar *data;
+
+ xdisplay = XOpenDisplay (NULL);
+ if (xdisplay == NULL)
+ meta_fatal ("Unable to open X display %s\n", XDisplayName (NULL));
+
+ root = DefaultRootWindow (xdisplay);
+ atom_enable_stereo = XInternAtom (xdisplay, "_MUTTER_ENABLE_STEREO", False);
+
+ XGetWindowProperty (xdisplay, root, atom_enable_stereo,
+ 0, 1, False, XA_INTEGER,
+ &type, &format, &n_items, &bytes_after, &data);
+ if (type == XA_INTEGER)
+ {
+ if (format == 32 && n_items == 1 && bytes_after == 0)
+ {
+ stereo_enabled = *(long *)data;
+ }
+ else
+ {
+ meta_warning ("Bad value for _MUTTER_ENABLE_STEREO property\n");
+ }
+
+ XFree (data);
+ }
+ else if (type != None)
+ {
+ meta_warning ("Bad type for _MUTTER_ENABLE_STEREO property\n");
+ }
+
+ meta_verbose ("On startup, _MUTTER_ENABLE_STEREO=%s",
+ stereo_enabled ? "yes" : "no");
+ clutter_x11_set_use_stereo_stage (stereo_enabled);
+ XCloseDisplay (xdisplay);
+}
+
+static gboolean
+meta_stereo_switch (gpointer data)
+{
+ stereo_switch_id = 0;
+ stereo_restart = TRUE;
+
+ meta_restart (stereo_have_windows ?
+ _("Enabling stereo...") :
+ _("Disabling stereo..."));
+
+ return FALSE;
+}
+
+void
+meta_stereo_set_have_stereo_windows (gboolean have_windows)
+{
+ have_windows = have_windows != FALSE;
+
+ if (!stereo_restart && have_windows != stereo_have_windows)
+ {
+ MetaDisplay *display = meta_get_display ();
+ Display *xdisplay = meta_x11_display_get_xdisplay (display->x11_display);
+ Window root = DefaultRootWindow (xdisplay);
+ Atom atom_enable_stereo = XInternAtom (xdisplay, "_MUTTER_ENABLE_STEREO", False);
+ long value;
+
+ stereo_have_windows = have_windows;
+
+ if (stereo_have_windows)
+ meta_verbose ("Detected stereo windows\n");
+ else
+ meta_verbose ("No stereo windows detected\n");
+
+ value = stereo_have_windows;
+ XChangeProperty (xdisplay, root,
+ atom_enable_stereo, XA_INTEGER, 32,
+ PropModeReplace, (guchar *)&value, 1);
+
+ if (stereo_switch_id != 0)
+ {
+ g_source_remove (stereo_switch_id);
+ stereo_switch_id = 0;
+ }
+
+ if (stereo_have_windows != stereo_enabled)
+ stereo_switch_id = g_timeout_add (stereo_have_windows ? STEREO_ENABLE_WAIT : STEREO_DISABLE_WAIT,
+ meta_stereo_switch, NULL);
+ }
+}
diff --git a/src/core/stereo.h b/src/core/stereo.h
new file mode 100644
index 000000000..ccd1d702a
--- /dev/null
+++ b/src/core/stereo.h
@@ -0,0 +1,28 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2014 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef META_STEREO_H
+#define META_STEREO_H
+
+void meta_stereo_init (void);
+void meta_stereo_set_have_stereo_windows (gboolean have_windows);
+gboolean meta_stereo_is_restart (void);
+void meta_stereo_finish_restart (void);
+
+#endif
diff --git a/src/meson.build b/src/meson.build
index 9919b5cfb..7cced8f53 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -353,6 +353,8 @@ mutter_sources = [
'core/stack.h',
'core/stack-tracker.c',
'core/stack-tracker.h',
+ 'core/stereo.c',
+ 'core/stereo.h',
'core/startup-notification.c',
'core/startup-notification-private.h',
'core/util.c',
diff --git a/src/wayland/meta-wayland-surface.c b/src/wayland/meta-wayland-surface.c
index da0acfcbb..ddad1a45c 100644
--- a/src/wayland/meta-wayland-surface.c
+++ b/src/wayland/meta-wayland-surface.c
@@ -731,7 +731,7 @@ meta_wayland_surface_apply_pending_state (MetaWaylandSurface *surface,
snippet = meta_wayland_buffer_create_snippet (pending->buffer);
is_y_inverted = meta_wayland_buffer_is_y_inverted (pending->buffer);
- meta_shaped_texture_set_texture (stex, texture);
+ meta_shaped_texture_set_textures (stex, texture, NULL);
meta_shaped_texture_set_snippet (stex, snippet);
meta_shaped_texture_set_is_y_inverted (stex, is_y_inverted);
g_clear_pointer (&snippet, cogl_object_unref);
--
2.23.0