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mutter-performance-source/cogl/cogl-renderer-xlib.c
Neil Roberts f6ae9decaa cogl-renderer: Move the XEvent filters to be generic for all renderers
Instead of having cogl_renderer_xlib_add_filter and friends there is
now cogl_renderer_add_native_filter which can be used regardless of
the backend. The callback function for the filter now just takes a
void pointer instead of an XEvent pointer which should be interpreted
differently depending on the backend. For example, on Xlib it would
still be an XEvent but on Windows it could be a MSG. This simplifies
the code somewhat because the _cogl_xlib_add_filter no longer needs to
have its own filter list when a stub renderer is used because there is
always a renderer available.

cogl_renderer_xlib_handle_event has also been renamed to
cogl_renderer_handle_native_event. This just forwards the event on to
all of the listeners. The backend renderer is expected to register its
own event filter if it wants to process the events in some way.
2011-04-20 18:17:06 +01:00

200 lines
4.8 KiB
C

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2008,2009,2010 Intel Corporation.
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-object.h"
#include "cogl-renderer-private.h"
#include "cogl-renderer-xlib-private.h"
#include "cogl-renderer-x11-private.h"
#include "cogl-winsys-private.h"
#include <X11/Xlib.h>
#include <X11/extensions/Xdamage.h>
static char *_cogl_x11_display_name = NULL;
static GList *_cogl_xlib_renderers = NULL;
static void
register_xlib_renderer (CoglRenderer *renderer)
{
GList *l;
for (l = _cogl_xlib_renderers; l; l = l->next)
if (l->data == renderer)
return;
_cogl_xlib_renderers = g_list_prepend (_cogl_xlib_renderers, renderer);
}
static void
unregister_xlib_renderer (CoglRenderer *renderer)
{
_cogl_xlib_renderers = g_list_remove (_cogl_xlib_renderers, renderer);
}
static CoglRenderer *
get_renderer_for_xdisplay (Display *xdpy)
{
GList *l;
for (l = _cogl_xlib_renderers; l; l = l->next)
{
CoglRenderer *renderer = l->data;
CoglRendererXlib *xlib_renderer = renderer->winsys;
if (xlib_renderer->xdpy == xdpy)
return renderer;
}
return NULL;
}
static int
error_handler (Display *xdpy,
XErrorEvent *error)
{
CoglRenderer *renderer;
CoglRendererXlib *xlib_renderer;
renderer = get_renderer_for_xdisplay (xdpy);
xlib_renderer = renderer->winsys;
g_assert (xlib_renderer->trap_state);
xlib_renderer->trap_state->trapped_error_code = error->error_code;
return 0;
}
void
_cogl_renderer_xlib_trap_errors (CoglRenderer *renderer,
CoglXlibTrapState *state)
{
CoglRendererXlib *xlib_renderer;
xlib_renderer = renderer->winsys;
state->trapped_error_code = 0;
state->old_error_handler = XSetErrorHandler (error_handler);
state->old_state = xlib_renderer->trap_state;
xlib_renderer->trap_state = state;
}
int
_cogl_renderer_xlib_untrap_errors (CoglRenderer *renderer,
CoglXlibTrapState *state)
{
CoglRendererXlib *xlib_renderer;
xlib_renderer = renderer->winsys;
g_assert (state == xlib_renderer->trap_state);
XSetErrorHandler (state->old_error_handler);
xlib_renderer->trap_state = state->old_state;
return state->trapped_error_code;
}
static Display *
assert_xlib_display (CoglRenderer *renderer, GError **error)
{
Display *xdpy = cogl_renderer_xlib_get_foreign_display (renderer);
CoglRendererXlib *xlib_renderer = renderer->winsys;
/* A foreign display may have already been set... */
if (xdpy)
{
xlib_renderer->xdpy = xdpy;
return xdpy;
}
xdpy = XOpenDisplay (_cogl_x11_display_name);
if (xdpy == NULL)
{
g_set_error (error,
COGL_RENDERER_ERROR,
COGL_RENDERER_ERROR_XLIB_DISPLAY_OPEN,
"Failed to open X Display %s", _cogl_x11_display_name);
return NULL;
}
xlib_renderer->xdpy = xdpy;
return xdpy;
}
gboolean
_cogl_renderer_xlib_connect (CoglRenderer *renderer, GError **error)
{
CoglRendererXlib *xlib_renderer = renderer->winsys;
CoglRendererX11 *x11_renderer = renderer->winsys;
int damage_error;
if (!assert_xlib_display (renderer, error))
return FALSE;
/* Check whether damage events are supported on this display */
if (!XDamageQueryExtension (xlib_renderer->xdpy,
&x11_renderer->damage_base,
&damage_error))
x11_renderer->damage_base = -1;
xlib_renderer->trap_state = NULL;
register_xlib_renderer (renderer);
return TRUE;
}
void
_cogl_renderer_xlib_disconnect (CoglRenderer *renderer)
{
CoglRendererXlib *xlib_renderer = renderer->winsys;
if (!renderer->foreign_xdpy)
XCloseDisplay (xlib_renderer->xdpy);
unregister_xlib_renderer (renderer);
}
Display *
cogl_renderer_xlib_get_display (CoglRenderer *renderer)
{
CoglRendererXlib *xlib_renderer;
g_return_val_if_fail (cogl_is_renderer (renderer), NULL);
xlib_renderer = renderer->winsys;
return xlib_renderer->xdpy;
}