| 31 | } |
| 32 | |
| 33 | void Image::encode(const std::uint8_t *data, std::size_t size, EncodingLevel level, std::size_t offset) { |
| 34 | auto image = this->image.get() + offset; |
| 35 | |
| 36 | if (level == EncodingLevel::Low) { |
| 37 | for (auto i = 0; i < size; i++, image += 8) { |
| 38 | image[0] = (image[0] & ~0b1) | ((data[i] >> 0) & 0b1); |
| 39 | image[1] = (image[1] & ~0b1) | ((data[i] >> 1) & 0b1); |
| 40 | image[2] = (image[2] & ~0b1) | ((data[i] >> 2) & 0b1); |
| 41 | image[3] = (image[3] & ~0b1) | ((data[i] >> 3) & 0b1); |
| 42 | image[4] = (image[4] & ~0b1) | ((data[i] >> 4) & 0b1); |
| 43 | image[5] = (image[5] & ~0b1) | ((data[i] >> 5) & 0b1); |
| 44 | image[6] = (image[6] & ~0b1) | ((data[i] >> 6) & 0b1); |
| 45 | image[7] = (image[7] & ~0b1) | ((data[i] >> 7) & 0b1); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | else if (level == EncodingLevel::Med) { |
| 50 | for (auto i = 0; i < size; i++, image += 4) { |
| 51 | image[0] = (image[0] & ~0b11) | ((data[i] >> 0) & 0b11); |
| 52 | image[1] = (image[1] & ~0b11) | ((data[i] >> 2) & 0b11); |
| 53 | image[2] = (image[2] & ~0b11) | ((data[i] >> 4) & 0b11); |
| 54 | image[3] = (image[3] & ~0b11) | ((data[i] >> 6) & 0b11); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | // High |
| 59 | else { |
| 60 | for (auto i = 0; i < size / 2; i++, image += 4, data += 2) { |
| 61 | image[0] = (image[0] & ~0xf) | (data[0] & 0xf); |
| 62 | image[1] = (image[1] & ~0xf) | (data[0] >> 4); |
| 63 | image[2] = (image[2] & ~0xf) | (data[1] & 0xf); |
| 64 | image[3] = (image[3] & ~0xf) | (data[1] >> 4); |
| 65 | } |
| 66 | |
| 67 | if (size % 2) { |
| 68 | image[0] = (image[0] & ~0xf) | (*data & 0xf); |
| 69 | image[1] = (image[1] & ~0xf) | (*data >> 4); |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | std::unique_ptr<std::uint8_t[]> Image::decode(std::size_t size, EncodingLevel level, std::size_t offset) { |
| 75 | auto data = std::make_unique<std::uint8_t[]>(size); |