24733abf68
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)
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2012 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-poll.h"
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#include "cogl-winsys-private.h"
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#include "cogl-context-private.h"
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void
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cogl_poll_get_info (CoglContext *context,
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CoglPollFD **poll_fds,
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int *n_poll_fds,
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int64_t *timeout)
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{
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const CoglWinsysVtable *winsys;
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_COGL_RETURN_IF_FAIL (cogl_is_context (context));
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_COGL_RETURN_IF_FAIL (poll_fds != NULL);
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_COGL_RETURN_IF_FAIL (n_poll_fds != NULL);
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_COGL_RETURN_IF_FAIL (timeout != NULL);
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if (!COGL_TAILQ_EMPTY (&context->onscreen_events_queue))
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{
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*n_poll_fds = 0;
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*timeout = 0;
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return;
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}
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winsys = _cogl_context_get_winsys (context);
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if (winsys->poll_get_info)
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{
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winsys->poll_get_info (context,
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poll_fds,
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n_poll_fds,
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timeout);
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return;
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}
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/* By default we'll assume Cogl doesn't need to block on anything */
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*poll_fds = NULL;
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*n_poll_fds = 0;
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*timeout = -1; /* no timeout */
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}
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void
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cogl_poll_dispatch (CoglContext *context,
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const CoglPollFD *poll_fds,
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int n_poll_fds)
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{
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const CoglWinsysVtable *winsys;
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_COGL_RETURN_IF_FAIL (cogl_is_context (context));
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if (!COGL_TAILQ_EMPTY (&context->onscreen_events_queue))
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_cogl_dispatch_onscreen_events (context);
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winsys = _cogl_context_get_winsys (context);
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if (winsys->poll_dispatch)
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winsys->poll_dispatch (context, poll_fds, n_poll_fds);
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}
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