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      1 /**************************************************************************
      2  *
      3  * Copyright 2013 Marek Olk <maraeo (at) 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_graph_set_dump_file(gr);
     92 
     93    hud_pane_add_graph(pane, gr);
     94 }
     95