| 156 | } |
| 157 | |
| 158 | static void WriteAlphaBlock7(int alpha0, int alpha1, uint8_t const* indices, void* block) |
| 159 | { |
| 160 | // check the relative values of the endpoints |
| 161 | if (alpha0 < alpha1) |
| 162 | { |
| 163 | // swap the indices |
| 164 | uint8_t swapped[16]; |
| 165 | for (int i = 0; i < 16; ++i) |
| 166 | { |
| 167 | uint8_t index = indices[i]; |
| 168 | if (index == 0) |
| 169 | swapped[i] = 1; |
| 170 | else if (index == 1) |
| 171 | swapped[i] = 0; |
| 172 | else |
| 173 | swapped[i] = 9 - index; |
| 174 | } |
| 175 | |
| 176 | // write the block |
| 177 | WriteAlphaBlock(alpha1, alpha0, swapped, block); |
| 178 | } |
| 179 | else |
| 180 | { |
| 181 | // write the block |
| 182 | WriteAlphaBlock(alpha0, alpha1, indices, block); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | |
| 187 | static void CompressAlphaDxt5(uint8_t* tile, void* block) |
no test coverage detected