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/**************************************************************************
*
* Copyright 2013 Marek Olšák <maraeo@gmail.com>
* All Rights Reserved.
*
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
/* This file contains code for calculating framerate for displaying on the HUD.
*/
#include "hud/hud_private.h"
#include "os/os_time.h"
#include "util/u_memory.h"
struct fps_info {
int frames;
uint64_t last_time;
};
static void
query_fps(struct hud_graph *gr)
{
struct fps_info *info = gr->query_data;
uint64_t now = os_time_get();
info->frames++;
if (info->last_time) {
if (info->last_time + gr->pane->period <= now) {
double fps = info->frames * 1000000 / (double)(now - info->last_time);
info->frames = 0;
info->last_time = now;
hud_graph_add_value(gr, fps);
}
}
else {
info->last_time = now;
}
}
void
hud_fps_graph_install(struct hud_pane *pane)
{
struct hud_graph *gr = CALLOC_STRUCT(hud_graph);
if (!gr)
return;
strcpy(gr->name, "fps");
gr->query_data = CALLOC_STRUCT(fps_info);
if (!gr->query_data) {
FREE(gr);
return;
}
gr->query_new_value = query_fps;
gr->free_query_data = free;
hud_pane_add_graph(pane, gr);
}
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