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mutter/SOURCES/glx-stereo-support.patch

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From 768818c8d071f066a2ab68f83381829838b5bf29 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 1/2] 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.
---
clutter/clutter/clutter-paint-nodes.c | 103 +++++++++++
clutter/clutter/clutter-paint-nodes.h | 13 ++
src/compositor/compositor.c | 8 +
src/compositor/meta-compositor-x11.c | 127 +++++++++++++
src/compositor/meta-compositor-x11.h | 6 +
src/compositor/meta-shaped-texture-private.h | 5 +-
src/compositor/meta-shaped-texture.c | 176 +++++++++++++++----
src/compositor/meta-surface-actor-wayland.c | 2 +-
src/compositor/meta-surface-actor-x11.c | 55 +++++-
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-actor-surface.c | 4 +-
17 files changed, 667 insertions(+), 52 deletions(-)
create mode 100644 src/core/stereo.c
create mode 100644 src/core/stereo.h
diff --git a/clutter/clutter/clutter-paint-nodes.c b/clutter/clutter/clutter-paint-nodes.c
index f1f7fce318..29a673e9c7 100644
--- a/clutter/clutter/clutter-paint-nodes.c
+++ b/clutter/clutter/clutter-paint-nodes.c
@@ -1970,3 +1970,106 @@ clutter_blur_node_new (unsigned int width,
out:
return (ClutterPaintNode *) blur_node;
}
+
+/*
+ * ClutterStereoNode
+ */
+
+struct _ClutterStereoNode
+{
+ ClutterPaintNode parent_instance;
+
+ CoglStereoMode stereo_mode;
+};
+
+struct _ClutterStereoNodeClass
+{
+ ClutterPaintNodeClass parent_class;
+};
+
+G_DEFINE_TYPE (ClutterStereoNode, clutter_stereo_node, CLUTTER_TYPE_PAINT_NODE)
+
+static gboolean
+clutter_stereo_node_pre_draw (ClutterPaintNode *node,
+ ClutterPaintContext *paint_context)
+{
+ ClutterStereoNode *stereo_node = CLUTTER_STEREO_NODE (node);
+ CoglFramebuffer *fb =
+ clutter_paint_context_get_framebuffer (paint_context);
+
+ g_warn_if_fail (cogl_framebuffer_get_is_stereo (fb));
+
+ cogl_framebuffer_set_stereo_mode (fb, stereo_node->stereo_mode);
+
+ return TRUE;
+}
+
+static void
+clutter_stereo_node_post_draw (ClutterPaintNode *node,
+ ClutterPaintContext *paint_context)
+{
+ CoglFramebuffer *fb =
+ clutter_paint_context_get_framebuffer (paint_context);
+
+ cogl_framebuffer_set_stereo_mode (fb, COGL_STEREO_BOTH);
+}
+
+static const char *
+stereo_mode_to_string (CoglStereoMode stereo_mode)
+{
+ switch (stereo_mode)
+ {
+ case COGL_STEREO_BOTH:
+ return "both";
+ case COGL_STEREO_LEFT:
+ return "left";
+ case COGL_STEREO_RIGHT:
+ return "right";
+ }
+
+ g_assert_not_reached ();
+}
+
+static JsonNode *
+clutter_stereo_node_serialize (ClutterPaintNode *node)
+{
+ ClutterStereoNode *stereo_node = CLUTTER_STEREO_NODE (node);
+ g_autoptr (JsonBuilder) builder = NULL;
+ const char *stereo_mode_str;
+
+ builder = json_builder_new ();
+ json_builder_begin_object (builder);
+ json_builder_set_member_name (builder, "stereo-mode");
+ stereo_mode_str = stereo_mode_to_string (stereo_node->stereo_mode);
+ json_builder_add_string_value (builder, stereo_mode_str);
+ json_builder_end_object (builder);
+
+ return json_builder_get_root (builder);
+}
+
+static void
+clutter_stereo_node_class_init (ClutterStereoNodeClass *klass)
+{
+ ClutterPaintNodeClass *node_class;
+
+ node_class = CLUTTER_PAINT_NODE_CLASS (klass);
+ node_class->pre_draw = clutter_stereo_node_pre_draw;
+ node_class->post_draw = clutter_stereo_node_post_draw;
+ node_class->serialize = clutter_stereo_node_serialize;
+}
+
+static void
+clutter_stereo_node_init (ClutterStereoNode *stereo_node)
+{
+}
+
+ClutterPaintNode *
+clutter_stereo_node_new (CoglStereoMode stereo_mode)
+{
+ ClutterStereoNode *stereo_node;
+
+ stereo_node = _clutter_paint_node_create (CLUTTER_TYPE_STEREO_NODE);
+ stereo_node->stereo_mode = stereo_mode;
+
+ return CLUTTER_PAINT_NODE (stereo_node);
+}
diff --git a/clutter/clutter/clutter-paint-nodes.h b/clutter/clutter/clutter-paint-nodes.h
index 7f0d12857a..77d1ab05b6 100644
--- a/clutter/clutter/clutter-paint-nodes.h
+++ b/clutter/clutter/clutter-paint-nodes.h
@@ -284,6 +284,19 @@ ClutterPaintNode * clutter_blur_node_new (unsigned int width,
unsigned int height,
float sigma);
+#define CLUTTER_TYPE_STEREO_NODE (clutter_stereo_node_get_type ())
+#define CLUTTER_STEREO_NODE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_STEREO_NODE, ClutterStereoNode))
+#define CLUTTER_IS_STEREO_NODE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_STEREO_NODE))
+
+typedef struct _ClutterStereoNode ClutterStereoNode;
+typedef struct _ClutterStereoNodeClass ClutterStereoNodeClass;
+
+CLUTTER_EXPORT
+GType clutter_stereo_node_get_type (void) G_GNUC_CONST;
+
+CLUTTER_EXPORT
+ClutterPaintNode * clutter_stereo_node_new (CoglStereoMode stereo_mode);
+
G_END_DECLS
#endif /* __CLUTTER_PAINT_NODES_H__ */
diff --git a/src/compositor/compositor.c b/src/compositor/compositor.c
index 1770550d4c..a4bd1252ae 100644
--- a/src/compositor/compositor.c
+++ b/src/compositor/compositor.c
@@ -66,6 +66,7 @@
#include "compositor/meta-window-actor-private.h"
#include "compositor/meta-window-group-private.h"
#include "core/frame.h"
+#include "core/stereo.h"
#include "core/util-private.h"
#include "core/window-private.h"
#include "meta/compositor-mutter.h"
@@ -910,6 +911,7 @@ meta_compositor_sync_stack (MetaCompositor *compositor,
meta_compositor_get_instance_private (compositor);
MetaWindowActor *top_window_actor;
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
@@ -986,12 +988,18 @@ meta_compositor_sync_stack (MetaCompositor *compositor,
*/
priv->windows = g_list_prepend (priv->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);
}
sync_actor_stacking (compositor);
+ if (!meta_is_wayland_compositor ())
+ meta_stereo_set_have_stereo_windows (stereo_window_count > 0);
+
top_window_actor = get_top_visible_window_actor (compositor);
if (priv->top_window_actor == top_window_actor)
diff --git a/src/compositor/meta-compositor-x11.c b/src/compositor/meta-compositor-x11.c
index 1d0ba4c8d8..afbe3f57e2 100644
--- a/src/compositor/meta-compositor-x11.c
+++ b/src/compositor/meta-compositor-x11.c
@@ -31,6 +31,8 @@
#include "compositor/meta-sync-ring.h"
#include "compositor/meta-window-actor-x11.h"
#include "core/display-private.h"
+#include "core/stack-tracker.h"
+#include "core/stereo.h"
#include "x11/meta-x11-display-private.h"
struct _MetaCompositorX11
@@ -50,8 +52,24 @@ struct _MetaCompositorX11
gboolean xserver_uses_monotonic_clock;
int64_t xserver_time_query_time_us;
int64_t xserver_time_offset_us;
+
+ int glx_opcode;
+ gboolean stereo_tree_ext;
+ gboolean have_stereo_windows;
};
+typedef struct
+{
+ int type;
+ unsigned long serial;
+ Bool send_event;
+ Display *display;
+ int extension;
+ int evtype;
+ Drawable window;
+ Bool stereo_tree;
+} StereoNotifyEvent;
+
G_DEFINE_TYPE (MetaCompositorX11, meta_compositor_x11, META_TYPE_COMPOSITOR)
static void
@@ -95,6 +113,27 @@ meta_compositor_x11_process_xevent (MetaCompositorX11 *compositor_x11,
if (window)
process_damage (compositor_x11, (XDamageNotifyEvent *) xevent, window);
}
+ else if (xevent->type == GenericEvent &&
+ xevent->xcookie.extension == compositor_x11->glx_opcode)
+ {
+ if (xevent->xcookie.evtype == GLX_STEREO_NOTIFY_EXT)
+ {
+ StereoNotifyEvent *stereo_event =
+ (StereoNotifyEvent *) (xevent->xcookie.data);
+
+ window = meta_x11_display_lookup_x_window (x11_display,
+ stereo_event->window);
+ if (window)
+ {
+ MetaWindowActor *window_actor = meta_window_actor_from_window (window);
+ MetaDisplay *display = meta_window_get_display (window);
+
+ meta_window_actor_stereo_notify (window_actor,
+ stereo_event->stereo_tree);
+ meta_stack_tracker_queue_sync_stack (display->stack_tracker);
+ }
+ }
+ }
if (compositor_x11->have_x11_sync_object)
meta_sync_ring_handle_event (xevent);
@@ -107,6 +146,85 @@ meta_compositor_x11_process_xevent (MetaCompositorX11 *compositor_x11,
meta_x11_handle_event (xevent);
}
+#define GLX_STEREO_TREE_EXT 0x20F5
+#define GLX_STEREO_NOTIFY_MASK_EXT 0x00000001
+#define GLX_STEREO_NOTIFY_EXT 0x00000000
+
+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_x11_window_is_stereo (MetaCompositorX11 *compositor_x11,
+ Window xwindow)
+{
+ MetaCompositor *compositor = META_COMPOSITOR (compositor_x11);
+ MetaDisplay *display = meta_compositor_get_display (compositor);
+ 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_x11->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_x11_select_stereo_notify (MetaCompositorX11 *compositor_x11,
+ Window xwindow)
+{
+ MetaCompositor *compositor = META_COMPOSITOR (compositor_x11);
+ MetaDisplay *display = meta_compositor_get_display (compositor);
+ Display *xdisplay = meta_x11_display_get_xdisplay (display->x11_display);
+
+ static void (*select_event) (Display *dpy,
+ Drawable draw,
+ unsigned long event_mask);
+
+ if (compositor_x11->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);
+ }
+}
+
static void
determine_server_clock_source (MetaCompositorX11 *compositor_x11)
{
@@ -142,6 +260,7 @@ meta_compositor_x11_manage (MetaCompositor *compositor,
MetaX11Display *x11_display = display->x11_display;
Display *xdisplay = meta_x11_display_get_xdisplay (x11_display);
int composite_version;
+ int glx_major_opcode, glx_first_event, glx_first_error;
MetaBackend *backend = meta_get_backend ();
Window xwindow;
@@ -166,10 +285,18 @@ meta_compositor_x11_manage (MetaCompositor *compositor,
return FALSE;
}
+ if (XQueryExtension (xdisplay,
+ "GLX",
+ &glx_major_opcode, &glx_first_event, &glx_first_error))
+ compositor_x11->glx_opcode = glx_major_opcode;
+
determine_server_clock_source (compositor_x11);
meta_x11_display_set_cm_selection (display->x11_display);
+ compositor_x11->stereo_tree_ext =
+ display_has_stereo_tree_ext (display->x11_display);
+
compositor_x11->output = display->x11_display->composite_overlay_window;
xwindow = meta_backend_x11_get_xwindow (META_BACKEND_X11 (backend));
diff --git a/src/compositor/meta-compositor-x11.h b/src/compositor/meta-compositor-x11.h
index 42554feb39..61f3cd5950 100644
--- a/src/compositor/meta-compositor-x11.h
+++ b/src/compositor/meta-compositor-x11.h
@@ -36,4 +36,10 @@ void meta_compositor_x11_process_xevent (MetaCompositorX11 *compositor_x11,
Window meta_compositor_x11_get_output_xwindow (MetaCompositorX11 *compositor_x11);
+gboolean meta_compositor_x11_window_is_stereo (MetaCompositorX11 *compositor_x11,
+ Window xwindow);
+
+void meta_compositor_x11_select_stereo_notify (MetaCompositorX11 *compositor_x11,
+ Window xwindow);
+
#endif /* META_COMPOSITOR_X11_H */
diff --git a/src/compositor/meta-shaped-texture-private.h b/src/compositor/meta-shaped-texture-private.h
index 2fe1b8ea48..fadad07d69 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"
MetaShapedTexture *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 6a8af828f0..43170a195d 100644
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -83,8 +83,10 @@ struct _MetaShapedTexture
GObject parent;
MetaTextureTower *paint_tower;
+ MetaTextureTower *paint_tower_right;
CoglTexture *texture;
+ CoglTexture *texture_right;
CoglTexture *mask_texture;
CoglSnippet *snippet;
@@ -151,6 +153,7 @@ static void
meta_shaped_texture_init (MetaShapedTexture *stex)
{
stex->paint_tower = meta_texture_tower_new ();
+ stex->paint_tower_right = NULL;
stex->buffer_scale = 1;
stex->texture = NULL;
@@ -251,11 +254,11 @@ meta_shaped_texture_dispose (GObject *object)
g_clear_handle_id (&stex->remipmap_timeout_id, g_source_remove);
- if (stex->paint_tower)
- 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->texture_right, cogl_object_unref);
meta_shaped_texture_set_mask_texture (stex, NULL);
meta_shaped_texture_reset_pipelines (stex);
@@ -521,14 +524,19 @@ paint_clipped_rectangle_node (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;
cogl_clear_object (&stex->texture);
+ cogl_clear_object (&stex->texture_right);
- if (cogl_tex != NULL)
+ stex->texture = cogl_tex;
+ stex->texture_right = cogl_tex_right;
+
+ if (cogl_tex)
{
stex->texture = cogl_object_ref (cogl_tex);
width = cogl_texture_get_width (COGL_TEXTURE (cogl_tex));
@@ -540,6 +548,9 @@ set_cogl_texture (MetaShapedTexture *stex,
height = 0;
}
+ if (cogl_tex_right)
+ cogl_object_ref (cogl_tex_right);
+
if (stex->tex_width != width ||
stex->tex_height != height)
{
@@ -553,8 +564,23 @@ set_cogl_texture (MetaShapedTexture *stex,
* previous buffer. We only queue a redraw in response to surface
* damage. */
+ if (cogl_tex_right)
+ {
+ if (!stex->paint_tower_right)
+ 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
@@ -582,6 +608,19 @@ flip_ints (int *x,
*y = tmp;
}
+static CoglFramebuffer *
+get_target_framebuffer (ClutterPaintNode *root_node,
+ ClutterPaintContext *paint_context)
+{
+ CoglFramebuffer *framebuffer;
+
+ framebuffer = clutter_paint_node_get_framebuffer (root_node);
+ if (!framebuffer)
+ framebuffer = clutter_paint_context_get_framebuffer (paint_context);
+
+ return framebuffer;
+}
+
static void
do_paint_content (MetaShapedTexture *stex,
ClutterPaintNode *root_node,
@@ -622,9 +661,7 @@ do_paint_content (MetaShapedTexture *stex,
* improves performance, especially with software rendering.
*/
- framebuffer = clutter_paint_node_get_framebuffer (root_node);
- if (!framebuffer)
- framebuffer = clutter_paint_context_get_framebuffer (paint_context);
+ framebuffer = get_target_framebuffer (root_node, paint_context);
if (stex->has_viewport_src_rect)
{
@@ -826,13 +863,27 @@ do_paint_content (MetaShapedTexture *stex,
static CoglTexture *
select_texture_for_paint (MetaShapedTexture *stex,
- ClutterPaintContext *paint_context)
+ ClutterPaintContext *paint_context,
+ CoglStereoMode stereo_mode)
{
CoglTexture *texture = NULL;
int64_t now;
+ gboolean use_right_texture = FALSE;
- if (!stex->texture)
- return NULL;
+ switch (stereo_mode)
+ {
+ case COGL_STEREO_LEFT:
+ case COGL_STEREO_BOTH:
+ if (!stex->texture)
+ return NULL;
+ use_right_texture = FALSE;
+ break;
+ case COGL_STEREO_RIGHT:
+ if (!stex->texture_right)
+ return NULL;
+ use_right_texture = TRUE;
+ break;
+ }
now = g_get_monotonic_time ();
@@ -843,14 +894,24 @@ select_texture_for_paint (MetaShapedTexture *stex,
if (age >= MIN_MIPMAP_AGE_USEC ||
stex->fast_updates < MIN_FAST_UPDATES_BEFORE_UNMIPMAP)
{
- texture = meta_texture_tower_get_paint_texture (stex->paint_tower,
+ MetaTextureTower *paint_tower;
+
+ if (use_right_texture)
+ paint_tower = stex->paint_tower_right;
+ else
+ paint_tower = stex->paint_tower;
+
+ texture = meta_texture_tower_get_paint_texture (paint_tower,
paint_context);
}
}
if (!texture)
{
- texture = stex->texture;
+ if (use_right_texture)
+ texture = stex->texture_right;
+ else
+ texture = stex->texture;
if (stex->create_mipmaps)
{
@@ -876,35 +937,57 @@ meta_shaped_texture_paint_content (ClutterContent *content,
{
MetaShapedTexture *stex = META_SHAPED_TEXTURE (content);
ClutterActorBox alloc;
- CoglTexture *paint_tex = NULL;
uint8_t opacity;
+ CoglFramebuffer *framebuffer;
+ gboolean is_stereo;
if (stex->clip_region && cairo_region_is_empty (stex->clip_region))
return;
- /* The GL EXT_texture_from_pixmap extension does allow for it to be
- * used together with SGIS_generate_mipmap, however this is very
- * rarely supported. Also, even when it is supported there
- * are distinct performance implications from:
- *
- * - Updating mipmaps that we don't need
- * - Having to reallocate pixmaps on the server into larger buffers
- *
- * So, we just unconditionally use our mipmap emulation code. If we
- * wanted to use SGIS_generate_mipmap, we'd have to query COGL to
- * see if it was supported (no API currently), and then if and only
- * if that was the case, set the clutter texture quality to HIGH.
- * Setting the texture quality to high without SGIS_generate_mipmap
- * support for TFP textures will result in fallbacks to XGetImage.
- */
- paint_tex = select_texture_for_paint (stex, paint_context);
- if (!paint_tex)
+ if (!stex->texture)
return;
opacity = clutter_actor_get_paint_opacity (actor);
clutter_actor_get_content_box (actor, &alloc);
- do_paint_content (stex, root_node, paint_context, paint_tex, &alloc, opacity);
+ framebuffer = get_target_framebuffer (root_node, paint_context);
+ is_stereo = (stex->texture_right &&
+ cogl_framebuffer_get_is_stereo (framebuffer));
+
+ if (is_stereo)
+ {
+ CoglTexture *texture_left;
+ CoglTexture *texture_right;
+ g_autoptr (ClutterPaintNode) left_node = NULL;
+ g_autoptr (ClutterPaintNode) right_node = NULL;
+
+ texture_left = select_texture_for_paint (stex, paint_context,
+ COGL_STEREO_LEFT);
+ texture_right = select_texture_for_paint (stex, paint_context,
+ COGL_STEREO_RIGHT);
+
+ left_node = clutter_stereo_node_new (COGL_STEREO_LEFT);
+ clutter_paint_node_set_static_name (left_node, "MetaShapedTexture (left)");
+ right_node = clutter_stereo_node_new (COGL_STEREO_RIGHT);
+ clutter_paint_node_set_static_name (right_node, "MetaShapedTexture (right)");
+
+ clutter_paint_node_add_child (root_node, left_node);
+ clutter_paint_node_add_child (root_node, right_node);
+
+ do_paint_content (stex, left_node, paint_context,
+ texture_left, &alloc, opacity);
+ do_paint_content (stex, right_node, paint_context,
+ texture_right, &alloc, opacity);
+ }
+ else
+ {
+ CoglTexture *texture;
+
+ texture = select_texture_for_paint (stex, paint_context,
+ COGL_STEREO_BOTH);
+ do_paint_content (stex, root_node, paint_context,
+ texture, &alloc, opacity);
+ }
}
static gboolean
@@ -946,6 +1029,12 @@ 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);
+ }
}
}
@@ -1079,6 +1168,14 @@ meta_shaped_texture_update_area (MetaShapedTexture *stex,
y,
width,
height);
+ if (stex->paint_tower_right)
+ {
+ meta_texture_tower_update_area (stex->paint_tower_right,
+ x,
+ y,
+ width,
+ height);
+ }
stex->prev_invalidation = stex->last_invalidation;
stex->last_invalidation = g_get_monotonic_time ();
@@ -1098,20 +1195,21 @@ 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));
- if (stex->texture == texture)
+ if (stex->texture == texture && stex->texture_right == texture_right)
return;
- 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 a182ad8513..1ddc83db2b 100644
--- a/src/compositor/meta-surface-actor-wayland.c
+++ b/src/compositor/meta-surface-actor-wayland.c
@@ -148,7 +148,7 @@ meta_surface_actor_wayland_dispose (GObject *object)
stex = meta_surface_actor_get_texture (META_SURFACE_ACTOR (self));
if (stex)
- meta_shaped_texture_set_texture (stex, NULL);
+ meta_shaped_texture_set_textures (stex, NULL, NULL);
if (self->surface)
{
diff --git a/src/compositor/meta-surface-actor-x11.c b/src/compositor/meta-surface-actor-x11.c
index 41ae2dffbc..c7c3d08c36 100644
--- a/src/compositor/meta-surface-actor-x11.c
+++ b/src/compositor/meta-surface-actor-x11.c
@@ -30,6 +30,7 @@
#include <X11/extensions/Xcomposite.h>
#include "cogl/winsys/cogl-texture-pixmap-x11.h"
+#include "compositor/meta-compositor-x11.h"
#include "compositor/meta-cullable.h"
#include "compositor/meta-shaped-texture-private.h"
#include "compositor/meta-window-actor-private.h"
@@ -47,6 +48,7 @@ struct _MetaSurfaceActorX11
MetaDisplay *display;
CoglTexture *texture;
+ CoglTexture *texture_right;
Pixmap pixmap;
Damage damage;
@@ -62,6 +64,8 @@ struct _MetaSurfaceActorX11
guint size_changed : 1;
guint unredirected : 1;
+
+ guint stereo : 1;
};
G_DEFINE_TYPE (MetaSurfaceActorX11,
@@ -101,7 +105,7 @@ 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);
@@ -110,6 +114,7 @@ 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
@@ -119,23 +124,37 @@ 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));
GError *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);
g_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!");
- 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
@@ -372,8 +391,8 @@ 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 *
@@ -381,12 +400,18 @@ 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);
+ MetaCompositorX11 *compositor_x11 = META_COMPOSITOR_X11 (display->compositor);
+ 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_x11_window_is_stereo (compositor_x11, xwindow);
+ meta_compositor_x11_select_stereo_notify (compositor_x11, xwindow);
+
g_signal_connect_object (self->display, "gl-video-memory-purged",
G_CALLBACK (reset_texture), self, G_CONNECT_SWAPPED);
@@ -420,3 +445,17 @@ 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 0a8517236a..369f631ae0 100644
--- a/src/compositor/meta-surface-actor-x11.h
+++ b/src/compositor/meta-surface-actor-x11.h
@@ -57,6 +57,11 @@ gboolean meta_surface_actor_x11_is_visible (MetaSurfaceActorX11 *self);
void meta_surface_actor_x11_handle_updates (MetaSurfaceActorX11 *self);
+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 64741e4167..d498879902 100644
--- a/src/compositor/meta-window-actor-private.h
+++ b/src/compositor/meta-window-actor-private.h
@@ -99,4 +99,9 @@ void meta_window_actor_update_regions (MetaWindowActor *self);
gboolean meta_window_actor_can_freeze_commits (MetaWindowActor *self);
+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 d4fc9a43a0..56c85e1788 100644
--- a/src/compositor/meta-window-actor.c
+++ b/src/compositor/meta-window-actor.c
@@ -1557,3 +1557,25 @@ out:
clutter_actor_uninhibit_culling (actor);
return surface;
}
+
+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 6dabcfe73e..a07dda9ecc 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -88,6 +88,7 @@
#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"
@@ -848,6 +849,9 @@ meta_init (void)
if (!meta_is_wayland_compositor ())
meta_select_display (opt_display_name);
+ if (!meta_is_wayland_compositor ())
+ meta_stereo_init ();
+
meta_init_backend (backend_gtype, n_properties, prop_names, prop_values);
for (i = 0; i < n_properties; i++)
diff --git a/src/core/stereo.c b/src/core/stereo.c
new file mode 100644
index 0000000000..817056527f
--- /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 0000000000..ccd1d702a1
--- /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 284bdf5220..c56438fbbe 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -394,6 +394,8 @@ 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-actor-surface.c b/src/wayland/meta-wayland-actor-surface.c
index 797795f861..d8d1f3ce16 100644
--- a/src/wayland/meta-wayland-actor-surface.c
+++ b/src/wayland/meta-wayland-actor-surface.c
@@ -193,7 +193,7 @@ meta_wayland_actor_surface_real_sync_actor_state (MetaWaylandActorSurface *actor
snippet = meta_wayland_buffer_create_snippet (buffer);
is_y_inverted = meta_wayland_buffer_is_y_inverted (buffer);
- meta_shaped_texture_set_texture (stex, surface->texture);
+ meta_shaped_texture_set_textures (stex, surface->texture, NULL);
meta_shaped_texture_set_snippet (stex, snippet);
meta_shaped_texture_set_is_y_inverted (stex, is_y_inverted);
meta_shaped_texture_set_buffer_scale (stex, surface->scale);
@@ -201,7 +201,7 @@ meta_wayland_actor_surface_real_sync_actor_state (MetaWaylandActorSurface *actor
}
else
{
- meta_shaped_texture_set_texture (stex, NULL);
+ meta_shaped_texture_set_textures (stex, NULL, NULL);
}
surface_rect = (cairo_rectangle_int_t) {
--
2.31.1
From 36517cd245584c5bcd3b730efaf6c3d2e7c9472d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20=C3=85dahl?= <jadahl@gmail.com>
Date: Wed, 2 Jun 2021 16:55:45 +0200
Subject: [PATCH 2/2] compositor: Only check for stereo when using GLX
If EGL Xlib is used, we'll get bogus return value and crash.
---
src/compositor/meta-compositor-x11.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/compositor/meta-compositor-x11.c b/src/compositor/meta-compositor-x11.c
index afbe3f57e2..4345f38b6f 100644
--- a/src/compositor/meta-compositor-x11.c
+++ b/src/compositor/meta-compositor-x11.c
@@ -153,9 +153,17 @@ meta_compositor_x11_process_xevent (MetaCompositorX11 *compositor_x11,
static gboolean
display_has_stereo_tree_ext (MetaX11Display *x11_display)
{
+ MetaBackend *backend = meta_get_backend ();
+ ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend);
+ CoglContext *cogl_context =
+ clutter_backend_get_cogl_context (clutter_backend);
+ CoglRenderer *cogl_renderer = cogl_context_get_renderer (cogl_context);
Display *xdisplay = x11_display->xdisplay;
const char *extensions_string;
+ if (cogl_renderer_get_winsys_id (cogl_renderer) != COGL_WINSYS_ID_GLX)
+ return FALSE;
+
static const char * (*query_extensions_string) (Display *display,
int screen);
--
2.31.1
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