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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 "os/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
  41. query_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.  
  63. static void
  64. free_query_data(void *p)
  65. {
  66.    FREE(p);
  67. }
  68.  
  69. void
  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.