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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include "Display/display_precomp.h"
#include "API/Display/frameratecounter.h"
#include "API/Core/System/system.h"
#include "frameratecounter_generic.h"
/////////////////////////////////////////////////////////////////////////////
// CL_FramerateCounter construction:
CL_FramerateCounter::CL_FramerateCounter()
: impl(new CL_FramerateCounter_Generic)
{
impl->start_time = CL_System::get_time();
impl->total_time = 0;
impl->frame_time = 0;
impl->fps_result = 0;
impl->fps_counter = 0;
}
CL_FramerateCounter::~CL_FramerateCounter ()
{
delete impl;
}
/////////////////////////////////////////////////////////////////////////////
// CL_FramerateCounter attributes:
int CL_FramerateCounter::get_fps()
{
return impl->fps_result;
}
void CL_FramerateCounter::set_fps_limit(int fps)
{
if (fps > 0)
impl->frame_time = 1000 / fps;
else
impl->frame_time = 0;
}
/////////////////////////////////////////////////////////////////////////////
// CL_FramerateCounter implementation:
void CL_FramerateCounter::keep_alive()
{
int cur_time = CL_System::get_time();
int delta_time = cur_time - impl->start_time;
impl->start_time = cur_time;
if (delta_time < impl->frame_time)
{
CL_System::sleep(impl->frame_time - delta_time);
impl->total_time += impl->frame_time;
}
else
{
impl->total_time += delta_time;
}
if(impl->total_time >= 1000) // One second has passed
{
impl->fps_result = impl->fps_counter + 1;
impl->fps_counter = impl->total_time = 0;
}
impl->fps_counter++; // Increase fps
}
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