Exemplo n.º 1
0
void color::blend(const color &other) {
  if (other.is_invisible()) return;
  r = alpha_over_c(other.r, other.a, r, a);
  g = alpha_over_c(other.g, other.a, g, a);
  b = alpha_over_c(other.b, other.a, b, a);
  a = a + (other.a * (0xff - a)) / 0xff;
  r = ((r * 0xff) / a);
  g = ((g * 0xff) / a);
  b = ((b * 0xff) / a);
}
Exemplo n.º 2
0
void image_operations::add_pixel(pos_t x, pos_t y, color &c)
{
  if (c.is_invisible()) {
    return;
  }
  
  if (!(x >= min_x)) { return; }
  if (!(y >= min_y)) { return; }
  if (!(x < max_x)) { return; }
  if (!(y < max_y)) { return; }

  color n = color(c);

  // tag with depth.
  n.z = z;
  
  image_operation oper;
  
  oper.x = (uint16_t)x;
  oper.y = (uint16_t)y;
  oper.c = n;
  
  operations.push_back(oper);
}