// Splits the image in pieces and calls the corresponding algorithm
void *thread_launcher(void *arguments)
{
piece_args *args;
args = (piece_args *) arguments;
int x,y, small_res_x, small_res_y, init_x, init_y, limit_x, limit_y;
int split, piece_x, piece_y;
if(args->total_threads > 2)
{
split = sqrt(args->total_threads);
}
else if (args->total_threads == 2)
{
split = 2;
}
else
{
split = 1;
}
if (args->thread_number > 0)
{
piece_x = args->thread_number % split;
piece_y = floor((float)args->thread_number / (float)split);
}
else
{
piece_x = 0;
piece_y = 0;
}
small_res_x = floor((float)args->res_x / (float)split);
small_res_y = floor((float)args->res_y / (float)split);
init_x = small_res_x * piece_x;
init_y = small_res_y * piece_y;
limit_x = init_x + small_res_x;
limit_y = init_y + small_res_y;
for (y = init_y; y < limit_y; y++)
{
for (x = init_x; x < limit_x; x++)
{
if(args->julia_mode == 0)
iteration_pixels[x + (y * args->res_x)] = mandelbrot_point(args->res_x, args->res_y, x, y, args->zoom, args->max_iteration);
else
iteration_pixels[x + (y * args->res_x)] = julia_point(args->res_x, args->res_y, x, y, args->zoom, args->max_iteration);
}
}
}
void MandelbrotShower::mouseReleaseEvent(QMouseEvent *e){
moving = false;
update();
move_now = e->pos();
QPointF start(xmin + move_start.x()*xres, ymax - move_start.y()*yres);
QPointF stop(xmin + move_now.x()*xres, ymax - move_now.y()*yres);
QRectF new_rect(start, stop);
QSize new_size;
if (!lock_proportions){
new_size = size;
if (size.width() < size.height())
new_size.setHeight(size.width()*fabs(new_rect.height()/new_rect.width()));
else
new_size.setWidth(size.height()*fabs(new_rect.width()/new_rect.height()));
}
if (!new_rect.isNull())
emit region_selected(new_rect, new_size);
else if (!julia)
emit julia_point(stop);
}
