Doc: Lossless JPEG clarifications
- Clarify that lossless JPEG is slower than and doesn't compress as well as lossy JPEG. (That should be obvious, because "lossy" literally means that data is thrown away.) - Re-generate TurboJPEG C API documentation using Doxygen 1.9.8. - Clarify that setting the data_precision field in jpeg_compress_struct to 16 requires lossless mode. - Explain what the predictor selection value actually does. (Refer to Recommendation ITU-T T.81 (1992) | ISO/IEC 10918-1:1994, Section H.1.2.1.)
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