hud_fps.c revision af69d88d 
1/**************************************************************************
2 *
3 * Copyright 2013 Marek Olšák <maraeo@gmail.com>
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/* This file contains code for calculating framerate for displaying on the HUD.
29 */
30
31#include "hud/hud_private.h"
32#include "os/os_time.h"
33#include "util/u_memory.h"
34
35struct fps_info {
36   int frames;
37   uint64_t last_time;
38};
39
40static void
41query_fps(struct hud_graph *gr)
42{
43   struct fps_info *info = gr->query_data;
44   uint64_t now = os_time_get();
45
46   info->frames++;
47
48   if (info->last_time) {
49      if (info->last_time + gr->pane->period <= now) {
50         double fps = (uint64_t)info->frames * 1000000 /
51                      (double)(now - info->last_time);
52         info->frames = 0;
53         info->last_time = now;
54
55         hud_graph_add_value(gr, (uint64_t) fps);
56      }
57   }
58   else {
59      info->last_time = now;
60   }
61}
62
63static void
64free_query_data(void *p)
65{
66   FREE(p);
67}
68
69void
70hud_fps_graph_install(struct hud_pane *pane)
71{
72   struct hud_graph *gr = CALLOC_STRUCT(hud_graph);
73
74   if (!gr)
75      return;
76
77   strcpy(gr->name, "fps");
78   gr->query_data = CALLOC_STRUCT(fps_info);
79   if (!gr->query_data) {
80      FREE(gr);
81      return;
82   }
83
84   gr->query_new_value = query_fps;
85
86   /* Don't use free() as our callback as that messes up Gallium's
87    * memory debugger.  Use simple free_query_data() wrapper.
88    */
89   gr->free_query_data = free_query_data;
90
91   hud_pane_add_graph(pane, gr);
92}
93