mutter/cogl/cogl-frame-info.c
Owen W. Taylor 24733abf68 onscreen: Add CoglFrameInfo and _add_frame_callback() api
Add a CoglFrameInfo object that tracks timing information for frames
that are drawn. We track a frame counter and frame timing information
for each CoglOnscreen. Internally a CoglFrameInfo is automatically
created for each frame, delimited by cogl_onscreen_swap_buffers() or
cogl_onscreen_swap_region() calls.

CoglFrameInfos are delivered to applications via frame event callbacks
that can be registered with a new cogl_onscreen_add_frame_callback()
api. Two initial event types (dispatched on all platforms) have been
defined; a _SYNC event used for throttling the frame rate of
applications and a _COMPLETE event used so signify the end of a frame.

Note: This new _add_frame_callback() api makes the
cogl_onscreen_add_swap_complete_callback() api redundant and so it
should be considered deprecated. Since the _add_swap_complete_callback()
api is still experimental api, we will be looking to quickly migrate
users to the new api so we can remove the old api.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 700401667db2522045e4623d78797b17f9184501)
2013-01-30 20:09:49 +00:00

73 lines
1.6 KiB
C

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2012 Red Hat, Inc.
*
* 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/>.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-frame-info-private.h"
static void _cogl_frame_info_free (CoglFrameInfo *info);
COGL_OBJECT_DEFINE (FrameInfo, frame_info);
CoglFrameInfo *
_cogl_frame_info_new (void)
{
CoglFrameInfo *info;
info = g_slice_new0 (CoglFrameInfo);
return _cogl_frame_info_object_new (info);
}
static void
_cogl_frame_info_free (CoglFrameInfo *info)
{
g_slice_free (CoglFrameInfo, info);
}
int64_t
cogl_frame_info_get_frame_counter (CoglFrameInfo *info)
{
return info->frame_counter;
}
int64_t
cogl_frame_info_get_presentation_time (CoglFrameInfo *info)
{
return info->presentation_time;
}
float
cogl_frame_info_get_refresh_rate (CoglFrameInfo *info)
{
return info->refresh_rate;
}
CoglOutput *
cogl_frame_info_get_output (CoglFrameInfo *info)
{
return info->output;
}