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mutter/clutter/gdk/clutter-stage-gdk.c
Emmanuele Bassi c91621e8c2 gdk: Use the Cogl visual on Xlib winsys 
GDK 3.16 started selecting different visuals, to best comply with the
requirements for OpenGL, and this has broken Clutter on GLX drivers that
are fairly picky in how they select visuals and GLXFBConfig.

GDK selects GLXFBConfig that do not include depth or stencil buffers;
Cogl, on the other hand, needs both depth and stencil buffers, and keeps
selecting the first available visual, assuming that the GLX driver will
give us the best compliant one, as per specification. Sadly, some
drivers will return incompatible configurations, and then bomb out when
you try to embed Clutter inside GTK+, because of mismatched visuals.

Cogl has an old, deprecated, Clutter-only API that allows us to retrieve
the XVisualInfo mapping to the GLXFBConfig it uses; this means we should
look up the GdkVisual for it when creating our own GdkWindows, instead
of relying on the RGBA and system GdkVisuals exposed by GDK — at least
on X11.

https://bugzilla.gnome.org/show_bug.cgi?id=747489
2015-06-10 19:06:25 +01:00

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/* Clutter.
* An OpenGL based 'interactive canvas' library.
* Authored By Matthew Allum <mallum@openedhand.com>
* Copyright (C) 2006-2007 OpenedHand
*
* 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 "config.h"
#include <math.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <cogl/cogl.h>
#ifdef COGL_HAS_XLIB_SUPPORT
#include <cogl/cogl-xlib.h>
#endif
#define GDK_DISABLE_DEPRECATION_WARNINGS
#include <gdk/gdk.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h>
#endif
#ifdef GDK_WINDOWING_WAYLAND
#include <gdk/gdkwayland.h>
#endif
#ifdef GDK_WINDOWING_WIN32
#include <gdk/gdkwin32.h>
#endif
#include "clutter-backend-gdk.h"
#include "clutter-stage-gdk.h"
#include "clutter-gdk.h"
#include "clutter-actor-private.h"
#include "clutter-debug.h"
#include "clutter-device-manager-private.h"
#include "clutter-enum-types.h"
#include "clutter-event-translator.h"
#include "clutter-event-private.h"
#include "clutter-feature.h"
#include "clutter-main.h"
#include "clutter-paint-volume-private.h"
#include "clutter-private.h"
#include "clutter-stage-private.h"
static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
static ClutterStageWindowIface *clutter_stage_window_parent_iface = NULL;
#define clutter_stage_gdk_get_type _clutter_stage_gdk_get_type
G_DEFINE_TYPE_WITH_CODE (ClutterStageGdk,
clutter_stage_gdk,
CLUTTER_TYPE_STAGE_COGL,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_STAGE_WINDOW,
clutter_stage_window_iface_init));
#if defined(GDK_WINDOWING_X11) && defined(COGL_HAS_XLIB_SUPPORT)
static void
clutter_stage_gdk_update_foreign_event_mask (CoglOnscreen *onscreen,
guint32 event_mask,
void *user_data)
{
ClutterStageGdk *stage_gdk = user_data;
/* we assume that a GDK event mask is bitwise compatible with X11
event masks */
gdk_window_set_events (stage_gdk->window, event_mask | CLUTTER_STAGE_GDK_EVENT_MASK);
}
#endif
static void
clutter_stage_gdk_set_gdk_geometry (ClutterStageGdk *stage)
{
GdkGeometry geometry;
ClutterStage *wrapper = CLUTTER_STAGE_COGL (stage)->wrapper;
gboolean resize = clutter_stage_get_user_resizable (wrapper);
if (!resize)
{
geometry.min_width = geometry.max_width = gdk_window_get_width (stage->window);
geometry.min_height = geometry.max_height = gdk_window_get_height (stage->window);
gdk_window_set_geometry_hints (stage->window,
&geometry,
GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE);
}
else
{
clutter_stage_get_minimum_size (wrapper,
(guint *)&geometry.min_width,
(guint *)&geometry.min_height);
gdk_window_set_geometry_hints (stage->window,
&geometry,
GDK_HINT_MIN_SIZE);
}
}
static void
clutter_stage_gdk_get_geometry (ClutterStageWindow *stage_window,
cairo_rectangle_int_t *geometry)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
if (stage_gdk->window != NULL)
{
geometry->width = gdk_window_get_width (stage_gdk->window);
geometry->height = gdk_window_get_height (stage_gdk->window);
}
else
{
geometry->width = 640;
geometry->height = 480;
}
}
static void
clutter_stage_gdk_resize (ClutterStageWindow *stage_window,
gint width,
gint height)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
if (width == 0 || height == 0)
{
/* Should not happen, if this turns up we need to debug it and
* determine the cleanest way to fix.
*/
g_warning ("GDK stage not allowed to have 0 width or height");
width = 1;
height = 1;
}
CLUTTER_NOTE (BACKEND, "New size received: (%d, %d)", width, height);
gdk_window_resize (stage_gdk->window, width, height);
}
static void
clutter_stage_gdk_unrealize (ClutterStageWindow *stage_window)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
if (stage_gdk->window != NULL)
{
g_object_set_data (G_OBJECT (stage_gdk->window),
"clutter-stage-window", NULL);
if (stage_gdk->foreign_window)
g_object_unref (stage_gdk->window);
else
gdk_window_destroy (stage_gdk->window);
stage_gdk->window = NULL;
}
return clutter_stage_window_parent_iface->unrealize (stage_window);
}
static gboolean
clutter_stage_gdk_realize (ClutterStageWindow *stage_window)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
ClutterStageCogl *stage_cogl = CLUTTER_STAGE_COGL (stage_window);
ClutterBackend *backend = CLUTTER_BACKEND (stage_cogl->backend);
ClutterBackendGdk *backend_gdk = CLUTTER_BACKEND_GDK (backend);
GdkWindowAttr attributes;
gboolean cursor_visible;
gboolean use_alpha;
gfloat width, height;
if (backend->cogl_context == NULL)
{
g_warning ("Missing Cogl context: was Clutter correctly initialized?");
return FALSE;
}
if (!stage_gdk->foreign_window)
{
if (stage_gdk->window != NULL)
{
/* complete realizing the stage */
cairo_rectangle_int_t geometry;
clutter_stage_gdk_get_geometry (stage_window, &geometry);
clutter_actor_set_size (CLUTTER_ACTOR (stage_cogl->wrapper),
geometry.width,
geometry.height);
gdk_window_ensure_native (stage_gdk->window);
gdk_window_set_events (stage_gdk->window, CLUTTER_STAGE_GDK_EVENT_MASK);
return TRUE;
}
else
{
attributes.title = NULL;
g_object_get (stage_cogl->wrapper,
"cursor-visible", &cursor_visible,
"title", &attributes.title,
"width", &width,
"height", &height,
"use-alpha", &use_alpha,
NULL);
attributes.width = width;
attributes.height = height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.window_type = GDK_WINDOW_TOPLEVEL;
attributes.event_mask = CLUTTER_STAGE_GDK_EVENT_MASK;
attributes.cursor = NULL;
if (!cursor_visible)
{
if (stage_gdk->blank_cursor == NULL)
stage_gdk->blank_cursor = gdk_cursor_new_for_display (backend_gdk->display, GDK_BLANK_CURSOR);
attributes.cursor = stage_gdk->blank_cursor;
}
/* If the ClutterStage:use-alpha is set, but GDK does not have an
* RGBA visual, then we unset the property on the Stage
*/
if (use_alpha)
{
if (gdk_screen_get_rgba_visual (backend_gdk->screen) == NULL)
{
clutter_stage_set_use_alpha (stage_cogl->wrapper, FALSE);
use_alpha = FALSE;
}
}
#if defined(GDK_WINDOWING_X11) && defined(COGL_HAS_XLIB_SUPPORT)
if (GDK_IS_X11_DISPLAY (backend_gdk->display))
{
XVisualInfo *xvisinfo = cogl_clutter_winsys_xlib_get_visual_info ();
if (xvisinfo != NULL)
{
attributes.visual = gdk_x11_screen_lookup_visual (backend_gdk->screen,
xvisinfo->visualid);
}
}
else
#endif
{
attributes.visual = use_alpha
? gdk_screen_get_rgba_visual (backend_gdk->screen)
: gdk_screen_get_system_visual (backend_gdk->screen);
}
if (attributes.visual == NULL)
{
/* This could still be an RGBA visual, although normally it's not */
attributes.visual = gdk_screen_get_system_visual (backend_gdk->screen);
}
stage_gdk->foreign_window = FALSE;
stage_gdk->window = gdk_window_new (NULL, &attributes,
GDK_WA_TITLE | GDK_WA_CURSOR | GDK_WA_VISUAL);
g_free (attributes.title);
}
clutter_stage_gdk_set_gdk_geometry (stage_gdk);
}
else
{
width = gdk_window_get_width (stage_gdk->window);
height = gdk_window_get_height (stage_gdk->window);
}
gdk_window_ensure_native (stage_gdk->window);
g_object_set_data (G_OBJECT (stage_gdk->window), "clutter-stage-window", stage_gdk);
stage_cogl->onscreen = cogl_onscreen_new (backend->cogl_context,
width, height);
#if defined(GDK_WINDOWING_X11) && defined(COGL_HAS_XLIB_SUPPORT)
if (GDK_IS_X11_WINDOW (stage_gdk->window))
{
cogl_x11_onscreen_set_foreign_window_xid (stage_cogl->onscreen,
GDK_WINDOW_XID (stage_gdk->window),
clutter_stage_gdk_update_foreign_event_mask,
stage_gdk);
}
else
#endif
#if defined(GDK_WINDOWING_WAYLAND) && defined(COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT)
if (GDK_IS_WAYLAND_WINDOW (stage_gdk->window))
{
cogl_wayland_onscreen_set_foreign_surface (stage_cogl->onscreen,
gdk_wayland_window_get_wl_surface (stage_gdk->window));
}
else
#endif
#if defined(GDK_WINDOWING_WIN32) && defined(COGL_HAS_WIN32_SUPPORT)
if (GDK_IS_WIN32_WINDOW (stage_gdk->window))
{
cogl_win32_onscreen_set_foreign_window (stage_cogl->onscreen,
gdk_win32_window_get_handle (stage_gdk->window));
}
else
#endif
{
g_warning ("Cannot find an appropriate CoglWinsys for a "
"GdkWindow of type %s", G_OBJECT_TYPE_NAME (stage_gdk->window));
cogl_object_unref (stage_cogl->onscreen);
stage_cogl->onscreen = NULL;
if (!stage_gdk->foreign_window)
gdk_window_destroy (stage_gdk->window);
stage_gdk->window = NULL;
return FALSE;
}
return clutter_stage_window_parent_iface->realize (stage_window);
}
static void
clutter_stage_gdk_set_fullscreen (ClutterStageWindow *stage_window,
gboolean is_fullscreen)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
ClutterStage *stage = CLUTTER_STAGE_COGL (stage_window)->wrapper;
if (stage == NULL || CLUTTER_ACTOR_IN_DESTRUCTION (stage))
return;
if (stage_gdk->window == NULL)
return;
CLUTTER_NOTE (BACKEND, "%ssetting fullscreen", is_fullscreen ? "" : "un");
if (is_fullscreen)
gdk_window_fullscreen (stage_gdk->window);
else
gdk_window_unfullscreen (stage_gdk->window);
}
static void
clutter_stage_gdk_set_cursor_visible (ClutterStageWindow *stage_window,
gboolean cursor_visible)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
if (stage_gdk->window == NULL)
return;
if (cursor_visible)
{
gdk_window_set_cursor (stage_gdk->window, NULL);
}
else
{
if (stage_gdk->blank_cursor == NULL)
{
GdkDisplay *display = clutter_gdk_get_default_display ();
stage_gdk->blank_cursor = gdk_cursor_new_for_display (display, GDK_BLANK_CURSOR);
}
gdk_window_set_cursor (stage_gdk->window, stage_gdk->blank_cursor);
}
}
static void
clutter_stage_gdk_set_title (ClutterStageWindow *stage_window,
const gchar *title)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
if (stage_gdk->window == NULL)
return;
gdk_window_set_title (stage_gdk->window, title);
}
static void
clutter_stage_gdk_set_user_resizable (ClutterStageWindow *stage_window,
gboolean is_resizable)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
GdkWMFunction function;
if (stage_gdk->window == NULL)
return;
function = GDK_FUNC_MOVE | GDK_FUNC_MINIMIZE | GDK_FUNC_CLOSE;
if (is_resizable)
function |= GDK_FUNC_RESIZE | GDK_FUNC_MAXIMIZE;
gdk_window_set_functions (stage_gdk->window, function);
clutter_stage_gdk_set_gdk_geometry (stage_gdk);
}
static void
clutter_stage_gdk_set_accept_focus (ClutterStageWindow *stage_window,
gboolean accept_focus)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
if (stage_gdk->window == NULL)
return;
gdk_window_set_accept_focus (stage_gdk->window, accept_focus);
}
static void
clutter_stage_gdk_show (ClutterStageWindow *stage_window,
gboolean do_raise)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
g_return_if_fail (stage_gdk->window != NULL);
clutter_actor_map (CLUTTER_ACTOR (CLUTTER_STAGE_COGL (stage_gdk)->wrapper));
if (do_raise)
gdk_window_show (stage_gdk->window);
else
gdk_window_show_unraised (stage_gdk->window);
}
static void
clutter_stage_gdk_hide (ClutterStageWindow *stage_window)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
g_return_if_fail (stage_gdk->window != NULL);
clutter_actor_unmap (CLUTTER_ACTOR (CLUTTER_STAGE_COGL (stage_gdk)->wrapper));
gdk_window_hide (stage_gdk->window);
}
static gboolean
clutter_stage_gdk_can_clip_redraws (ClutterStageWindow *stage_window)
{
return TRUE;
}
static int
clutter_stage_gdk_get_scale_factor (ClutterStageWindow *stage_window)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
if (stage_gdk->window == NULL)
return 1;
return gdk_window_get_scale_factor (stage_gdk->window);
}
static void
clutter_stage_gdk_redraw (ClutterStageWindow *stage_window)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
GdkFrameClock *clock;
if (stage_gdk->window == NULL ||
(clock = gdk_window_get_frame_clock (stage_gdk->window)) == NULL)
{
clutter_stage_window_parent_iface->redraw (stage_window);
return;
}
gdk_frame_clock_begin_updating (clock);
clutter_stage_window_parent_iface->redraw (stage_window);
gdk_frame_clock_end_updating (clock);
}
static void
clutter_stage_gdk_schedule_update (ClutterStageWindow *stage_window,
gint sync_delay)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
GdkFrameClock *clock;
if (stage_gdk->window == NULL ||
(clock = gdk_window_get_frame_clock (stage_gdk->window)) == NULL)
{
clutter_stage_window_parent_iface->schedule_update (stage_window, sync_delay);
return;
}
gdk_frame_clock_request_phase (clock, GDK_FRAME_CLOCK_PHASE_UPDATE);
clutter_stage_window_parent_iface->schedule_update (stage_window, sync_delay);
}
static gint64
clutter_stage_gdk_get_update_time (ClutterStageWindow *stage_window)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (stage_window);
GdkFrameClock *frame_clock;
GdkFrameTimings *frame_timings;
if (stage_gdk->window == NULL ||
(frame_clock = gdk_window_get_frame_clock (stage_gdk->window)) == NULL ||
(frame_timings = gdk_frame_clock_get_current_timings (frame_clock)) == NULL ||
!gdk_frame_timings_get_complete (frame_timings))
return -1; /* No data, indefinite */
return (gdk_frame_timings_get_presentation_time (frame_timings) +
gdk_frame_timings_get_refresh_interval (frame_timings));
}
static void
clutter_stage_gdk_dispose (GObject *gobject)
{
ClutterStageGdk *stage_gdk = CLUTTER_STAGE_GDK (gobject);
if (stage_gdk->window != NULL)
{
g_object_set_data (G_OBJECT (stage_gdk->window),
"clutter-stage-window", NULL);
if (stage_gdk->foreign_window)
g_object_unref (stage_gdk->window);
else
gdk_window_destroy (stage_gdk->window);
stage_gdk->window = NULL;
}
if (stage_gdk->blank_cursor != NULL)
{
g_object_unref (stage_gdk->blank_cursor);
stage_gdk->blank_cursor = NULL;
}
G_OBJECT_CLASS (clutter_stage_gdk_parent_class)->dispose (gobject);
}
static void
clutter_stage_gdk_class_init (ClutterStageGdkClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose = clutter_stage_gdk_dispose;
}
static void
clutter_stage_gdk_init (ClutterStageGdk *stage)
{
/* nothing to do here */
}
static void
clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
{
clutter_stage_window_parent_iface = g_type_interface_peek_parent (iface);
iface->set_title = clutter_stage_gdk_set_title;
iface->set_fullscreen = clutter_stage_gdk_set_fullscreen;
iface->set_cursor_visible = clutter_stage_gdk_set_cursor_visible;
iface->set_user_resizable = clutter_stage_gdk_set_user_resizable;
iface->set_accept_focus = clutter_stage_gdk_set_accept_focus;
iface->show = clutter_stage_gdk_show;
iface->hide = clutter_stage_gdk_hide;
iface->resize = clutter_stage_gdk_resize;
iface->get_geometry = clutter_stage_gdk_get_geometry;
iface->realize = clutter_stage_gdk_realize;
iface->unrealize = clutter_stage_gdk_unrealize;
iface->can_clip_redraws = clutter_stage_gdk_can_clip_redraws;
iface->get_scale_factor = clutter_stage_gdk_get_scale_factor;
iface->redraw = clutter_stage_gdk_redraw;
iface->schedule_update = clutter_stage_gdk_schedule_update;
iface->get_update_time = clutter_stage_gdk_get_update_time;
}
/**
* clutter_gdk_get_stage_window:
* @stage: a #ClutterStage
*
* Gets the stages GdkWindow.
*
* Return value: (transfer none): A GdkWindow* for the stage window.
*
* Since: 1.10
*/
GdkWindow *
clutter_gdk_get_stage_window (ClutterStage *stage)
{
ClutterStageWindow *impl;
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
impl = _clutter_stage_get_window (stage);
if (!CLUTTER_IS_STAGE_GDK (impl))
{
g_critical ("The Clutter backend is not a GDK backend");
return NULL;
}
return CLUTTER_STAGE_GDK (impl)->window;
}
/**
* clutter_gdk_get_stage_from_window:
* @window: a #GtkWindow
*
* Gets the stage for a particular X window.
*
* Return value: (transfer none): A #ClutterStage, or% NULL if a stage
* does not exist for the window
*
* Since: 1.10
*/
ClutterStage *
clutter_gdk_get_stage_from_window (GdkWindow *window)
{
ClutterStageGdk *stage_gdk = g_object_get_data (G_OBJECT (window), "clutter-stage-window");
if (stage_gdk != NULL && CLUTTER_IS_STAGE_GDK (stage_gdk))
return CLUTTER_STAGE_COGL (stage_gdk)->wrapper;
return NULL;
}
typedef struct
{
ClutterStageGdk *stage_gdk;
GdkWindow *window;
} ForeignWindowClosure;
static void
set_foreign_window_callback (ClutterActor *actor,
void *data)
{
ForeignWindowClosure *closure = data;
ClutterStageGdk *stage_gdk = closure->stage_gdk;
stage_gdk->window = closure->window;
stage_gdk->foreign_window = TRUE;
/* calling this with the stage unrealized will unset the stage
* from the GL context; once the stage is realized the GL context
* will be set again
*/
clutter_stage_ensure_current (CLUTTER_STAGE (actor));
}
/**
* clutter_gdk_set_stage_foreign:
* @stage: a #ClutterStage
* @window: an existing #GdkWindow
*
* Target the #ClutterStage to use an existing external #GdkWindow
*
* Return value: %TRUE if foreign window is valid
*
* Since: 1.10
*/
gboolean
clutter_gdk_set_stage_foreign (ClutterStage *stage,
GdkWindow *window)
{
ForeignWindowClosure closure;
ClutterStageGdk *stage_gdk;
ClutterStageWindow *impl;
ClutterActor *actor;
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), FALSE);
g_return_val_if_fail (!CLUTTER_ACTOR_IN_DESTRUCTION (stage), FALSE);
g_return_val_if_fail (GDK_IS_WINDOW (window), FALSE);
impl = _clutter_stage_get_window (stage);
if (!CLUTTER_IS_STAGE_GDK (impl))
{
g_critical ("The Clutter backend is not a GDK backend");
return FALSE;
}
stage_gdk = CLUTTER_STAGE_GDK (impl);
if (g_object_get_data (G_OBJECT (window), "clutter-stage-window") != NULL)
{
g_critical ("The provided GdkWindow is already in use by another ClutterStage");
return FALSE;
}
closure.stage_gdk = stage_gdk;
closure.window = g_object_ref (window);
actor = CLUTTER_ACTOR (stage);
_clutter_actor_rerealize (actor,
set_foreign_window_callback,
&closure);
/* Queue a relayout - so the stage will be allocated the new
* window size.
*
* Note also that when the stage gets allocated the new
* window size that will result in the stage's
* priv->viewport being changed, which will in turn result
* in the Cogl viewport changing when _clutter_do_redraw
* calls _clutter_stage_maybe_setup_viewport().
*/
clutter_actor_queue_relayout (actor);
return TRUE;
}
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