| 332 | } |
| 333 | |
| 334 | RawImage DngDecoder::decodeRawInternal() { |
| 335 | vector<const TiffIFD*> data = mRootIFD->getIFDsWithTag(COMPRESSION); |
| 336 | |
| 337 | if (data.empty()) |
| 338 | ThrowRDE("No image data found"); |
| 339 | |
| 340 | dropUnsuportedChunks(&data); |
| 341 | |
| 342 | if (data.empty()) |
| 343 | ThrowRDE("No RAW chunks found"); |
| 344 | |
| 345 | if (data.size() > 1) { |
| 346 | writeLog(DEBUG_PRIO_EXTRA, "Multiple RAW chunks found - using first only!"); |
| 347 | } |
| 348 | |
| 349 | const TiffIFD* raw = data[0]; |
| 350 | |
| 351 | bps = raw->getEntry(BITSPERSAMPLE)->getU32(); |
| 352 | if (bps < 1 || bps > 32) |
| 353 | ThrowRDE("Unsupported bit per sample count: %u.", bps); |
| 354 | |
| 355 | uint32_t sample_format = 1; |
| 356 | if (raw->hasEntry(SAMPLEFORMAT)) |
| 357 | sample_format = raw->getEntry(SAMPLEFORMAT)->getU32(); |
| 358 | |
| 359 | compression = raw->getEntry(COMPRESSION)->getU16(); |
| 360 | |
| 361 | switch (sample_format) { |
| 362 | case 1: |
| 363 | mRaw = RawImage::create(TYPE_USHORT16); |
| 364 | break; |
| 365 | case 3: |
| 366 | mRaw = RawImage::create(TYPE_FLOAT32); |
| 367 | break; |
| 368 | default: |
| 369 | ThrowRDE("Only 16 bit unsigned or float point data supported. Sample " |
| 370 | "format %u is not supported.", |
| 371 | sample_format); |
| 372 | } |
| 373 | |
| 374 | mRaw->isCFA = (raw->getEntry(PHOTOMETRICINTERPRETATION)->getU16() == 32803); |
| 375 | |
| 376 | if (mRaw->isCFA) |
| 377 | writeLog(DEBUG_PRIO_EXTRA, "This is a CFA image"); |
| 378 | else { |
| 379 | writeLog(DEBUG_PRIO_EXTRA, "This is NOT a CFA image"); |
| 380 | } |
| 381 | |
| 382 | if (sample_format == 1 && bps > 16) |
| 383 | ThrowRDE("Integer precision larger than 16 bits currently not supported."); |
| 384 | |
| 385 | if (sample_format == 3 && bps != 16 && bps != 24 && bps != 32) |
| 386 | ThrowRDE("Floating point must be 16/24/32 bits per sample."); |
| 387 | |
| 388 | mRaw->dim.x = raw->getEntry(IMAGEWIDTH)->getU32(); |
| 389 | mRaw->dim.y = raw->getEntry(IMAGELENGTH)->getU32(); |
| 390 | |
| 391 | if (!mRaw->dim.hasPositiveArea()) |
nothing calls this directly
no test coverage detected