91 lines
3 KiB
C
91 lines
3 KiB
C
/*
|
|
Copyright (c) 2020, Lukas Holzbeierlein (Captain4LK)
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
|
|
|
|
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
|
|
|
|
3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
//External includes
|
|
#include <SDL2/SDL.h>
|
|
//-------------------------------------
|
|
|
|
//Internal includes
|
|
#include "../../include/SLK/SLK_functions.h"
|
|
//-------------------------------------
|
|
|
|
//#defines
|
|
//-------------------------------------
|
|
|
|
//Typedefs
|
|
//-------------------------------------
|
|
|
|
//Variables
|
|
int fps;
|
|
int frametime;
|
|
int framedelay;
|
|
int framestart;
|
|
float delta;
|
|
//-------------------------------------
|
|
|
|
//Function prototypes
|
|
//-------------------------------------
|
|
|
|
//Function implementations
|
|
|
|
//Sets the target fps.
|
|
//Pass a value of 0 or lower to set maximum fps.
|
|
//Hardlimited to 1000 fps because SDL_GetTicks can't go
|
|
//smaller than milliseconds.
|
|
void SLK_timer_set_fps(int FPS)
|
|
{
|
|
if(FPS<1||FPS>1000)
|
|
fps = 1000;
|
|
else
|
|
fps = FPS;
|
|
|
|
framedelay = 1000/fps;
|
|
}
|
|
|
|
//Returns the currently targeted fps.
|
|
//Don't know how this could be usefull,
|
|
//but anyway, here it is.
|
|
int SLK_timer_get_fps()
|
|
{
|
|
return fps;
|
|
}
|
|
|
|
//Updates the timings and sleeps
|
|
//the needed amount of time.
|
|
//Already gets called in SLK_update,
|
|
//only use if you know
|
|
//what you are doing.
|
|
void SLK_timer_update()
|
|
{
|
|
frametime = SDL_GetTicks()-framestart;
|
|
|
|
if(framedelay>frametime)
|
|
SDL_Delay(framedelay-frametime);
|
|
|
|
delta = (float)(SDL_GetTicks()-framestart)/1000.0f;
|
|
framestart = SDL_GetTicks();
|
|
}
|
|
|
|
//Returns the time the last frame has taken
|
|
//in seconds.
|
|
//SLK is designed to use fixed framerates,
|
|
//but if you desire to do something else
|
|
//I won't stop you.
|
|
float SLK_timer_get_delta()
|
|
{
|
|
return delta;
|
|
}
|
|
//-------------------------------------
|