| 51 | |
| 52 | template<int N> |
| 53 | void addLayer() |
| 54 | { |
| 55 | auto siv = layers.back(); |
| 56 | buffers.emplace_back(siv.width() / N, siv.height() / N); |
| 57 | layers.push_back(buffers.back()); |
| 58 | auto& div = buffers.back(); |
| 59 | auto* d = div.data(); |
| 60 | |
| 61 | for (int dy = 0; dy < div.height(); ++dy) |
| 62 | for (int dx = 0; dx < div.width(); ++dx) { |
| 63 | int sum = (N * N) / 2; |
| 64 | for (int ty = 0; ty < N; ++ty) |
| 65 | for (int tx = 0; tx < N; ++tx) |
| 66 | sum += *siv.data(dx * N + tx, dy * N + ty); |
| 67 | *d++ = sum / (N * N); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | void addLayer(int factor) |
| 72 | { |