mutter/cogl/cogl-poll.c
Robert Bragg ed90c6fed9 Move event polling into CoglRenderer
This updates the cogl_poll_ apis to allow dispatching events before we
have a CoglContext and to also enables pollfd state to be changed in a
more add-hoc way by different Cogl components by replacing the
winsys->get_poll_info with _cogl_poll_renderer_add/remove_fd functions
and a winsys->get_dispatch_timeout vfunc.

One of the intentions here is that applications should be able to run
their mainloop before creating a CoglContext to potentially get events
relating to CoglOutputs.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 667e58c9cb2662aef5f44e580a9eda42dc8d0176)
2013-04-30 16:39:31 +01:00

144 lines
3.7 KiB
C

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2012 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, see <http://www.gnu.org/licenses/>.
*
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-poll.h"
#include "cogl-poll-private.h"
#include "cogl-winsys-private.h"
#include "cogl-renderer-private.h"
#include "cogl-context-private.h"
int
cogl_poll_renderer_get_info (CoglRenderer *renderer,
CoglPollFD **poll_fds,
int *n_poll_fds,
int64_t *timeout)
{
const CoglWinsysVtable *winsys;
_COGL_RETURN_VAL_IF_FAIL (cogl_is_renderer (renderer), 0);
_COGL_RETURN_VAL_IF_FAIL (poll_fds != NULL, 0);
_COGL_RETURN_VAL_IF_FAIL (n_poll_fds != NULL, 0);
_COGL_RETURN_VAL_IF_FAIL (timeout != NULL, 0);
*poll_fds = (void *)renderer->poll_fds->data;
*n_poll_fds = renderer->poll_fds->len;
/* NB: This will be NULL until the renderer has been connected,
* associated with a CoglDisplay and then a CoglContext is
* created from that display. */
if (renderer->context)
{
if (!COGL_TAILQ_EMPTY (&renderer->context->onscreen_events_queue))
{
*timeout = 0;
return renderer->poll_fds_age;
}
}
winsys = renderer->winsys_vtable;
if (winsys->get_dispatch_timeout)
*timeout = winsys->get_dispatch_timeout (renderer);
else
*timeout = -1;
return renderer->poll_fds_age;
}
void
cogl_poll_renderer_dispatch (CoglRenderer *renderer,
const CoglPollFD *poll_fds,
int n_poll_fds)
{
const CoglWinsysVtable *winsys;
_COGL_RETURN_IF_FAIL (cogl_is_renderer (renderer));
/* FIXME: arbitrary cogl components should just be able to queue
* idle functions so that we don't have to explicitly poke into
* CoglContext here and understand about the CoglOnscreen event
* queue... */
if (renderer->context)
{
CoglContext *context = renderer->context;
if (!COGL_TAILQ_EMPTY (&context->onscreen_events_queue))
_cogl_dispatch_onscreen_events (context);
}
winsys = renderer->winsys_vtable;
if (winsys->poll_dispatch)
winsys->poll_dispatch (renderer, poll_fds, n_poll_fds);
}
static int
find_pollfd (CoglRenderer *renderer, int fd)
{
int i;
for (i = 0; i < renderer->poll_fds->len; i++)
{
CoglPollFD *pollfd = &g_array_index (renderer->poll_fds, CoglPollFD, i);
if (pollfd->fd == fd)
return i;
}
return -1;
}
void
_cogl_poll_renderer_remove_fd (CoglRenderer *renderer, int fd)
{
int i = find_pollfd (renderer, fd);
if (i < 0)
return;
g_array_remove_index_fast (renderer->poll_fds, i);
renderer->poll_fds_age++;
}
void
_cogl_poll_renderer_add_fd (CoglRenderer *renderer,
int fd,
CoglPollFDEvent events)
{
CoglPollFD pollfd = {
fd,
events
};
_cogl_poll_renderer_remove_fd (renderer, fd);
g_array_append_val (renderer->poll_fds, pollfd);
renderer->poll_fds_age++;
}