[REFERENCE] Real-Time-Normal-Map-Dxt-Compression

DXT5N & 3Dc(aka BC5) compression in common code & SIMD:

http://mrelusive.com/publications/papers/Real-Time-Normal-Map-Dxt-Compression.pdf

Others:

dxt1 real time compression

http://www.nvidia.com/object/real-time-ycocg-dxt-compression.html

real time compresion using SIMD & Intel TBB

https://software.intel.com/en-us/articles/fast-cpu-dxt-compression