fps.c


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#include <time.h>

#include "SDL.h"
#include "SDL_opengl.h"

#include "text.h"
#include "fps.h"

static clock_t start;
static GLfloat fps;

void
GLPong_FPSInit() {
	start = SDL_GetTicks();
}

void
GLPong_FPSCount() {
	// 10.0f is the number of frames we let draw before calculating FPS
	fps = 10.0f / (SDL_GetTicks() - start) * 1000; // 1 sec / 1 millisec == 1000
	start = SDL_GetTicks();
}

void
GLPong_FPSPrint() {
	printf("%.2f frames per second\n", fps);
}