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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 "util/os_time.h"
33 #include "util/u_memory.h"
34 
35 struct fps_info {
36    int frames;
37    uint64_t last_time;
38 };
39 
40 static void
query_fps(struct hud_graph * gr,struct pipe_context * pipe)41 query_fps(struct hud_graph *gr, struct pipe_context *pipe)
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, fps);
56       }
57    }
58    else {
59       info->last_time = now;
60    }
61 }
62 
63 static void
free_query_data(void * p,struct pipe_context * pipe)64 free_query_data(void *p, struct pipe_context *pipe)
65 {
66    FREE(p);
67 }
68 
69 void
hud_fps_graph_install(struct hud_pane * pane)70 hud_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