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Moved most of the love.timer code out of the sdl implementation folder.

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This commit is contained in:
Alex Szpakowski
2015-03-20 00:55:14 -03:00
parent d31168c0e0
commit 163d059305
6 changed files with 188 additions and 166 deletions
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src/modules/timer/Timer.cpp
+147
View File
@@ -0,0 +1,147 @@
/**
* Copyright (c) 2006-2015 LOVE Development 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.
**/
// LOVE
#include "common/config.h"
#include "common/int.h"
#include "Timer.h"
#if defined(LOVE_WINDOWS)
#include <windows.h>
#elif defined(LOVE_MACOSX) || defined(LOVE_IOS)
#include <mach/mach_time.h>
#include <sys/time.h>
#elif defined(LOVE_LINUX)
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#endif
#if defined(LOVE_LINUX)
static inline double getTimeOfDay()
{
timeval t;
gettimeofday(&t, NULL);
return (double) t.tv_sec + (double) t.tv_usec / 1000000.0;
}
#endif
namespace love
{
namespace timer
{
Timer::Timer()
: currTime(0)
, prevFpsUpdate(0)
, fps(0)
, averageDelta(0)
, fpsUpdateFrequency(1)
, frames(0)
, dt(0)
, timerPeriod(getTimerPeriod())
{
prevFpsUpdate = currTime = getTime();
}
void Timer::step()
{
// Frames rendered
frames++;
// "Current" time is previous time by now.
prevTime = currTime;
// Get time from system.
currTime = getTime();
// Convert to number of seconds.
dt = currTime - prevTime;
double timeSinceLast = currTime - prevFpsUpdate;
// Update FPS?
if (timeSinceLast > fpsUpdateFrequency)
{
fps = int((frames/timeSinceLast) + 0.5);
averageDelta = timeSinceLast/frames;
prevFpsUpdate = currTime;
frames = 0;
}
}
double Timer::getDelta() const
{
return dt;
}
int Timer::getFPS() const
{
return fps;
}
double Timer::getAverageDelta() const
{
return averageDelta;
}
double Timer::getTimerPeriod()
{
#if defined(LOVE_MACOSX) || defined(LOVE_IOS)
mach_timebase_info_data_t info;
mach_timebase_info(&info);
return (double) info.numer / (double) info.denom / 1000000000.0;
#elif defined(LOVE_WINDOWS)
LARGE_INTEGER temp;
if (QueryPerformanceFrequency(&temp) != 0 && temp.QuadPart != 0)
return 1.0 / (double) temp.QuadPart;
#endif
return 0;
}
double Timer::getTime() const
{
#if defined(LOVE_LINUX)
double mt;
// Check for POSIX timers and monotonic clocks. If not supported, use the gettimeofday fallback.
#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) \
&& (defined(CLOCK_MONOTONIC_RAW) || defined(CLOCK_MONOTONIC))
timespec t;
#ifdef CLOCK_MONOTONIC_RAW
clockid_t clk_id = CLOCK_MONOTONIC_RAW;
#else
clockid_t clk_id = CLOCK_MONOTONIC;
#endif
if (clock_gettime(clk_id, &t) == 0)
mt = (double) t.tv_sec + (double) t.tv_nsec / 1000000000.0;
else
#endif
mt = getTimeOfDay();
return mt;
#elif defined(LOVE_MACOSX) || defined(LOVE_IOS)
return (double) mach_absolute_time() * timerPeriod;
#elif defined(LOVE_WINDOWS)
LARGE_INTEGER microTime;
QueryPerformanceCounter(&microTime);
return (double) microTime.QuadPart * timerPeriod;
#endif
}
} // timer
} // love
src/modules/timer/Timer.h
+32 -5
View File
@@ -33,6 +33,7 @@ class Timer : public Module
{
public:
Timer();
virtual ~Timer() {}
// Implements Module.
@@ -42,7 +43,7 @@ public:
* Measures the time between this call and the previous call,
* and updates internal values accordinly.
**/
virtual void step() = 0;
virtual void step();
/**
* Tries to sleep for the specified amount of time. The precision is
@@ -55,19 +56,19 @@ public:
* Gets the time between the last two frames, assuming step is called
* each frame.
**/
virtual double getDelta() const = 0;
virtual double getDelta() const;
/**
* Gets the average FPS over the last second. Beucase the value is only updated
* once per second, it does not look erratic when displayed on screen.
* @return The "current" FPS.
**/
virtual int getFPS() const = 0;
virtual int getFPS() const;
/**
* Gets the average delta time (seconds per frame) over the last second.
**/
virtual double getAverageDelta() const = 0;
virtual double getAverageDelta() const;
/**
* Gets the amount of time passed since an unspecified time. Useful for
@@ -75,7 +76,33 @@ public:
* and increases monotonically.
* @return The time (in seconds)
**/
virtual double getTime() const = 0;
virtual double getTime() const;
private:
// Frame delta vars.
double currTime;
double prevTime;
double prevFpsUpdate;
// Updated with a certain frequency.
int fps;
double averageDelta;
// The frequency by which to update the FPS.
double fpsUpdateFrequency;
// Frames since last FPS update.
int frames;
// The current timestep.
double dt;
// The timer period (reciprocal of the frequency.)
const double timerPeriod;
// Returns the timer period on some platforms.
static double getTimerPeriod();
}; // Timer
src/modules/timer/sdl/Timer.cpp
-118
View File
@@ -19,38 +19,12 @@
**/
// LOVE
#include "common/config.h"
#include "Timer.h"
#include "common/delay.h"
#include "common/int.h"
// SDL
#include <SDL.h>
#if defined(LOVE_WINDOWS)
#include <windows.h>
#elif defined(LOVE_MACOSX) || defined(LOVE_IOS)
#include <mach/mach_time.h>
#include <sys/time.h>
#elif defined(LOVE_LINUX)
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#endif
namespace
{
#if defined(LOVE_LINUX)
inline double getTimeOfDay()
{
timeval t;
gettimeofday(&t, NULL);
return (double) t.tv_sec + (double) t.tv_usec / 1000000.0;
}
#endif
}
namespace love
{
namespace timer
@@ -59,20 +33,10 @@ namespace sdl
{
Timer::Timer()
: currTime(0)
, prevFpsUpdate(0)
, fps(0)
, averageDelta(0)
, fpsUpdateFrequency(1)
, frames(0)
, dt(0)
, timerPeriod(getTimerPeriod())
{
// Init the SDL timer system (needed for SDL_Delay.)
if (SDL_InitSubSystem(SDL_INIT_TIMER) < 0)
throw love::Exception("%s", SDL_GetError());
prevFpsUpdate = currTime = getTime();
}
Timer::~Timer()
@@ -86,94 +50,12 @@ const char *Timer::getName() const
return "love.timer.sdl";
}
void Timer::step()
{
// Frames rendered
frames++;
// "Current" time is previous time by now.
prevTime = currTime;
// Get time from system.
currTime = getTime();
// Convert to number of seconds.
dt = currTime - prevTime;
double timeSinceLast = currTime - prevFpsUpdate;
// Update FPS?
if (timeSinceLast > fpsUpdateFrequency)
{
fps = int((frames/timeSinceLast) + 0.5);
averageDelta = timeSinceLast/frames;
prevFpsUpdate = currTime;
frames = 0;
}
}
void Timer::sleep(double seconds) const
{
if (seconds > 0)
delay((unsigned int)(seconds*1000));
}
double Timer::getDelta() const
{
return dt;
}
int Timer::getFPS() const
{
return fps;
}
double Timer::getAverageDelta() const
{
return averageDelta;
}
double Timer::getTimerPeriod()
{
#if defined(LOVE_MACOSX) || defined(LOVE_IOS)
mach_timebase_info_data_t info;
mach_timebase_info(&info);
return (double) info.numer / (double) info.denom / 1000000000.0;
#elif defined(LOVE_WINDOWS)
LARGE_INTEGER temp;
if (QueryPerformanceFrequency(&temp) != 0 && temp.QuadPart != 0)
return 1.0 / (double) temp.QuadPart;
#endif
return 0;
}
double Timer::getTime() const
{
#if defined(LOVE_LINUX)
double mt;
// Check for POSIX timers and monotonic clocks. If not supported, use the gettimeofday fallback.
#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) \
&& (defined(CLOCK_MONOTONIC_RAW) || defined(CLOCK_MONOTONIC))
timespec t;
#ifdef CLOCK_MONOTONIC_RAW
clockid_t clk_id = CLOCK_MONOTONIC_RAW;
#else
clockid_t clk_id = CLOCK_MONOTONIC;
#endif
if (clock_gettime(clk_id, &t) == 0)
mt = (double) t.tv_sec + (double) t.tv_nsec / 1000000000.0;
else
#endif
mt = getTimeOfDay();
return mt;
#elif defined(LOVE_MACOSX) || defined(LOVE_IOS)
return (double) mach_absolute_time() * timerPeriod;
#elif defined(LOVE_WINDOWS)
LARGE_INTEGER microTime;
QueryPerformanceCounter(&microTime);
return (double) microTime.QuadPart * timerPeriod;
#endif
}
} // sdl
} // timer
} // love
src/modules/timer/sdl/Timer.h
+2 -43
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@@ -31,57 +31,16 @@ namespace timer
namespace sdl
{
/**
* An SDL timer module. Can keep track of time between certain function
* calls, and provides access to a FPS metric which updates once each second.
**/
class Timer : public love::timer::Timer
{
public:
/**
* Constructor. Initializes the SDL/timer subsystem.
**/
Timer();
/**
* Destructor.
**/
virtual ~Timer();
const char *getName() const;
void step();
void sleep(double seconds) const;
double getDelta() const;
int getFPS() const;
double getAverageDelta() const;
double getTime() const;
const char *getName() const override;
private:
// Frame delta vars.
double currTime;
double prevTime;
double prevFpsUpdate;
// Updated with a certain frequency.
int fps;
double averageDelta;
// The frequency by which to update the FPS.
double fpsUpdateFrequency;
// Frames since last FPS update.
int frames;
// The current timestep.
double dt;
// The timer period (reciprocal of the frequency.)
const double timerPeriod;
// Returns the timer period on some platforms.
static double getTimerPeriod();
void sleep(double seconds) const override;
}; // Timer