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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* render.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/24 09:54:59 by cacharle #+# #+# */
/* Updated: 2020/02/26 13:29:04 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "fractol.h"
#define SUPERSAMPLE_SIZE 3
static t_color st_take_sample(t_state *state, t_complex z, double step_r, double step_i)
{
double u;
double v;
t_complex sz;
t_color color;
t_color tmp;
int r;
int g;
int b;
color.hexcode = 0x0;
r = 0;
g = 0;
b = 0;
u = 0.0;
while (u < state->samples)
{
v = 0.0;
while (v < state->samples)
{
sz.i = z.i + step_i * (u / state->samples);
sz.r = z.r + step_r * (v / state->samples);
tmp = state->palette[state->func(state, sz)];
r += tmp.rgb.r;
g += tmp.rgb.g;
b += tmp.rgb.b;
v += 1.0;
}
u += 1.0;
}
int s = (int)(state->samples * state->samples);
color.rgb.r = r / s;
color.rgb.g = g / s;
color.rgb.b = b / s;
return (color);
}
static void *st_render_routine(void *void_arg)
{
int j;
t_complex z;
t_state *state;
int offset;
double step_r;
t_render_routine_arg *arg;
arg = void_arg;
state = arg->state;
z = arg->z;
offset = arg->offset;
j = -1;
step_r = state->plane.r / (double)WINDOW_WIDTH;
z.r = state->center.r - state->plane.r / 2.0;
while (++j < WINDOW_WIDTH)
{
((t_color*)state->window.data)[offset] = state->samples == 1.0 ?
state->palette[state->func(state, z)] : st_take_sample(state, z, step_r, arg->step_i);
offset++;
z.r += step_r;
}
return (NULL);
}
static void st_render_fractal(t_state *state)
{
int i;
pthread_t threads[WINDOW_HEIGHT];
t_render_routine_arg routine_args[WINDOW_HEIGHT];
double step_i;
double z_i;
step_i = state->plane.i / (double)WINDOW_HEIGHT;
z_i = state->center.i - state->plane.i / 2.0;
i = -1;
while (++i < WINDOW_HEIGHT)
{
routine_args[i].state = state;
routine_args[i].offset = i * WINDOW_WIDTH;
routine_args[i].z.i = z_i;
routine_args[i].step_i = step_i;
if (pthread_create(threads + i, NULL, st_render_routine, routine_args + i) < 0)
{
state->running = false;
break;
}
z_i += step_i;
}
while (i-- > 0)
pthread_join(threads[i], NULL);
}
int render_update(t_state *state)
{
if (!state->running)
{
state_destroy(state);
exit(EXIT_SUCCESS);
}
if (state->updated)
return (0);
st_render_fractal(state);
mlx_put_image_to_window(state->mlx_ptr, state->window_ptr, state->window.id, 0, 0);
state->updated = true;
return (0);
}
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