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kernel.cl
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kernel.cl
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#define ABS(Value) (Value >= 0) ? (Value) : -(Value)
#define MAX_ITER 30
#define MAX_ITER1 700
double ft_get_world_pos(double screen_coord, double widheight, double zoom)
{
return (((screen_coord - widheight / 2) / zoom));
}
int burning_ship(unsigned int max_iter, double c_x, double c_y)
{
double real;
double imaginary;
double tmpreal;
unsigned int i;
i = 0;
imaginary = 0;
real = 0;
while (i < max_iter)
{
tmpreal = ABS(real * real - imaginary * imaginary + c_x);
imaginary = ABS(2 * real * imaginary + c_y);
real = tmpreal;
if (real * real + imaginary * imaginary > 4)
return (i);
i++;
}
return (0);
}
int julia_set(const double2 juliapos, unsigned int max_iter, double real, double imaginary)
{
double c_x;
double c_y;
double tmpreal;
unsigned int i;
// int col;
// col = 0;
c_x = juliapos.x;
c_y = juliapos.y;
i = 0;
while (i < max_iter)
{
tmpreal = real * real - imaginary * imaginary + c_x;
imaginary = 2 * real * imaginary + c_y;
real = tmpreal;
// col += exp(ABS(-z));
if (real * real + imaginary * imaginary > 4)
return (i);
i++;
}
return (0);
}
int tricorn(unsigned int max_iter, double c_x, double c_y)
{
double real;
double imaginary;
double tmpreal;
unsigned int i;
i = 0;
imaginary = 0;
real = 0;
while (i < max_iter)
{
tmpreal = real * real - imaginary * imaginary + c_x;
imaginary = -2 * real * imaginary + c_y;
real = tmpreal;
if (real * real + imaginary * imaginary > 4)
return (i);
i++;
}
return (0);
}
int mandelbrot_set(unsigned int max_iter, double c_x, double c_y)
{
double real;
double imaginary;
double tmpreal;
unsigned int i;
i = 0;
imaginary = 0;
real = 0;
while (i < max_iter)
{
tmpreal = real * real - imaginary * imaginary + c_x;
imaginary = 2 * real * imaginary + c_y;
real = tmpreal;
if (real * real + imaginary * imaginary > 4)
return (i);
i++;
}
return (0);
}
void ft_color_change(int *col, uchar3 color, const double zoom, unsigned int max_iter)
{
int tmp;
unsigned char *ptr;
tmp = *col;
ptr = (unsigned char*)col;
ptr[0] = (tmp) * (color.z / (MAX_ITER - 10));
ptr[1] = (tmp) * (color.y / (MAX_ITER - 10));
ptr[2] = (tmp) * (color.x / (MAX_ITER - 10));
}
int ft_checkif_in_set(const char set, const double2 juliapos, unsigned int max_iter, double a, double b)
{
if (set == 'j')
return (julia_set(juliapos, max_iter, a, b));
else if (set == 'm')
return (mandelbrot_set(max_iter, a, b));
else if (set == 'b')
return (burning_ship(max_iter, a, b));
else if (set == 't')
return (tricorn(max_iter, a, b));
return (0);
}
__kernel void fractol(
__global int* results,
const unsigned int width,
const unsigned int height,
const unsigned int max_iter,
const double movex,
const double movey,
const double zoom,
const double2 juliapos,
const char set,
uchar3 color)
{
const int i = get_global_id(0);
int col;
int x = i % width;
int y = i / width;
double w_x = ft_get_world_pos(x, (double)width, zoom) - movex;
double w_y = ft_get_world_pos(y, (double)height, zoom) - movey;
if (col = ft_checkif_in_set(set, juliapos, max_iter, w_x, w_y))
{
ft_color_change(&col, color, zoom, max_iter);
results[i] = col;// % 2 == 0 ? 0xFFFFFF : 0x0;
}
else
results[i] = 0x0;
}