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/*
* Cogl
*
* A Low Level GPU Graphics and Utilities API
*
* Copyright (C) 2012 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*
*
* Authors:
* Owen Taylor <otaylor@redhat.com>
*/
#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
#error "Only <cogl/cogl.h> can be included directly."
#endif
#ifndef __COGL_FRAME_INFO_H
#define __COGL_FRAME_INFO_H
#include <cogl/cogl-types.h>
#include <cogl/cogl-output.h>
#ifdef COGL_HAS_GTYPE_SUPPORT
#include <glib-object.h>
#endif
#include <glib.h>
G_BEGIN_DECLS
typedef struct _CoglFrameInfo CoglFrameInfo;
#define COGL_FRAME_INFO(X) ((CoglFrameInfo *)(X))
#ifdef COGL_HAS_GTYPE_SUPPORT
/**
* cogl_frame_info_get_gtype:
*
* Returns: a #GType that can be used with the GLib type system.
*/
GType cogl_frame_info_get_gtype (void);
#endif
/**
* cogl_is_frame_info:
* @object: A #CoglObject pointer
*
* Gets whether the given object references a #CoglFrameInfo.
*
* Return value: %TRUE if the object references a #CoglFrameInfo
* and %FALSE otherwise.
* Since: 2.0
* Stability: unstable
*/
CoglBool
cogl_is_frame_info (void *object);
/**
* cogl_frame_info_get_frame_counter:
* @info: a #CoglFrameInfo object
*
* Gets the frame counter for the #CoglOnscreen that corresponds
* to this frame.
*
* Return value: The frame counter value
* Since: 1.14
* Stability: unstable
*/
int64_t cogl_frame_info_get_frame_counter (CoglFrameInfo *info);
/**
* cogl_frame_info_get_presentation_time:
* @info: a #CoglFrameInfo object
*
* Gets the presentation time for the frame. This is the time at which
* the frame became visible to the user.
*
* The presentation time measured in nanoseconds is based on a
* monotonic time source. The time source is not necessarily
* correlated with system/wall clock time and may represent the time
* elapsed since some undefined system event such as when the system
* last booted.
*
* <note>Linux kernel version less that 3.8 can result in
* non-monotonic timestamps being reported when using a drm based
* OpenGL driver. Also some buggy Mesa drivers up to 9.0.1 may also
* incorrectly report non-monotonic timestamps.</note>
*
* Return value: the presentation time for the frame
* Since: 1.14
* Stability: unstable
*/
int64_t cogl_frame_info_get_presentation_time (CoglFrameInfo *info);
/**
* cogl_frame_info_get_refresh_rate:
* @info: a #CoglFrameInfo object
*
* Gets the refresh rate in Hertz for the output that the frame was on
* at the time the frame was presented.
*
* <note>Some platforms can't associate a #CoglOutput with a
* #CoglFrameInfo object but are able to report a refresh rate via
* this api. Therefore if you need this information then this api is
* more reliable than using cogl_frame_info_get_output() followed by
* cogl_output_get_refresh_rate().</note>
*
* Return value: the refresh rate in Hertz
* Since: 1.14
* Stability: unstable
*/
float cogl_frame_info_get_refresh_rate (CoglFrameInfo *info);
/**
* cogl_frame_info_get_output:
* @info: a #CoglFrameInfo object
*
* Gets the #CoglOutput that the swapped frame was presented to.
*
* Return value: (transfer none): The #CoglOutput that the frame was
* presented to, or %NULL if this could not be determined.
* Since: 1.14
* Stability: unstable
*/
CoglOutput *
cogl_frame_info_get_output (CoglFrameInfo *info);
int cogl_frame_info_get_fd (CoglFrameInfo *info);
G_END_DECLS
#endif /* __COGL_FRAME_INFO_H */
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