Image noise: Difference between revisions

=={{header|C}}==

{{WIP}}

{{trans|OCaml}}

<lang c>#include <stdlib.h>

#include <stdio.h>

#include <SDL/SDL.h>

unsigned int frames = 0;

unsigned int t_acc = 0;

void print_fps ()

{

static Uint32 last_t = 0;

last_t = SDL_GetTicks();

Uint32 t = SDL_GetTicks();

Uint32 dt = t - last_t;

t_acc += dt;

if (t_acc > 1000)

{

unsigned int el_time = t_acc / 1000;

printf("- fps: %g\n%!",

(float) frames / (float) el_time);

t_acc = 0;

frames = 0;

}

last_t = t;

}

void blit_noise(SDL_Surface surf)

{

long dim = surf->h;

white (1)

{

for (i = 0; i < dim; i++)

{

if (rand() & 1) {

surf->pixels[something] = something_else;

}

}

SDL_Flip(surf);

++frames;

print_fps();

}

}

int main(void)

{

SDL_Surface surf = NULL;

unsigned int seed = 99;

srand(seed);

SDL_Init(SDL_INIT_TIMER | SDL_INIT_VIDEO);

surf = SDL_SetVideoMode(320, 240, 8, SDL_DOUBLEBUF /*SDL_HWSURFACE*/);

blit_noise(surf);

}</lang>