* directly access it but it is more than fast enough. */
for (y = 0; y < s->height; y++) {
double w = 1 / sqrt(nb_freq);
- int a = sqrt(w * sqrt(data[0][2 * y + 0] * data[0][2 * y + 0] + data[0][2 * y + 1] * data[0][2 * y + 1]));
- int b = (nb_display_channels == 2 ) ? sqrt(w * sqrt(data[1][2 * y + 0] * data[1][2 * y + 0]
- + data[1][2 * y + 1] * data[1][2 * y + 1])) : a;
+ int a = sqrt(w * hypot(data[0][2 * y + 0], data[0][2 * y + 1]));
+ int b = (nb_display_channels == 2 ) ? sqrt(w * hypot(data[1][2 * y + 0], data[1][2 * y + 1]))
+ : a;
a = FFMIN(a, 255);
b = FFMIN(b, 255);
fgcolor = SDL_MapRGB(screen->format, a, b, (a + b) / 2);