| 172 | } |
| 173 | |
| 174 | static void WriteAlphaBlock5( int alpha0, int alpha1, u8 const* indices, void* block ) |
| 175 | { |
| 176 | // check the relative values of the endpoints |
| 177 | if( alpha0 > alpha1 ) |
| 178 | { |
| 179 | // swap the indices |
| 180 | u8 swapped[16]; |
| 181 | for( int i = 0; i < 16; ++i ) |
| 182 | { |
| 183 | u8 index = indices[i]; |
| 184 | if( index == 0 ) |
| 185 | swapped[i] = 1; |
| 186 | else if( index == 1 ) |
| 187 | swapped[i] = 0; |
| 188 | else if( index <= 5 ) |
| 189 | swapped[i] = 7 - index; |
| 190 | else |
| 191 | swapped[i] = index; |
| 192 | } |
| 193 | |
| 194 | // write the block |
| 195 | WriteAlphaBlock( alpha1, alpha0, swapped, block ); |
| 196 | } |
| 197 | else |
| 198 | { |
| 199 | // write the block |
| 200 | WriteAlphaBlock( alpha0, alpha1, indices, block ); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | static void WriteAlphaBlock7( int alpha0, int alpha1, u8 const* indices, void* block ) |
| 205 | { |
no test coverage detected