| 278 | // --- PAA → DDS conversion (raw block copy for DXT) --- |
| 279 | |
| 280 | DDSFile DDSConverter::PAAFileToDDS(const std::string& paaPath) |
| 281 | { |
| 282 | DDSFile result; |
| 283 | |
| 284 | // Read PAA metadata |
| 285 | PAAInfo info; |
| 286 | if (!ReadPAAInfo(paaPath, info) || !info.formatName) |
| 287 | return result; |
| 288 | |
| 289 | // Map PAA format → PixelFormat |
| 290 | PixelFormat pf = PixelFormat::Unknown; |
| 291 | switch (info.magic) |
| 292 | { |
| 293 | case 0xFF01: |
| 294 | pf = PixelFormat::DXT1; |
| 295 | break; |
| 296 | case 0xFF03: |
| 297 | pf = PixelFormat::DXT3; |
| 298 | break; |
| 299 | case 0xFF05: |
| 300 | pf = PixelFormat::DXT5; |
| 301 | break; |
| 302 | default: |
| 303 | break; |
| 304 | } |
| 305 | |
| 306 | if (pf != PixelFormat::Unknown) |
| 307 | { |
| 308 | // DXT: extract raw compressed blocks from PAA mipmaps (no re-encoding) |
| 309 | std::ifstream f(paaPath, std::ios::binary); |
| 310 | if (!f.good()) |
| 311 | return result; |
| 312 | |
| 313 | // Skip magic word |
| 314 | uint16_t magic; |
| 315 | f.read(reinterpret_cast<char*>(&magic), 2); |
| 316 | |
| 317 | // Skip TAGGs |
| 318 | while (f.good()) |
| 319 | { |
| 320 | uint32_t tag; |
| 321 | f.read(reinterpret_cast<char*>(&tag), 4); |
| 322 | if (tag != 0x54414747) |
| 323 | { |
| 324 | f.seekg(-4, std::ios::cur); |
| 325 | break; |
| 326 | } |
| 327 | uint32_t tagName; |
| 328 | f.read(reinterpret_cast<char*>(&tagName), 4); |
| 329 | uint32_t tagSize; |
| 330 | f.read(reinterpret_cast<char*>(&tagSize), 4); |
| 331 | f.seekg(tagSize, std::ios::cur); |
| 332 | } |
| 333 | |
| 334 | // Skip palette |
| 335 | uint16_t palCount; |
| 336 | f.read(reinterpret_cast<char*>(&palCount), 2); |
| 337 | if (palCount > 0) |
nothing calls this directly
no test coverage detected