Nikola Vasilev gashtio
zeux
/ edge-encode.cpp
Last active
December 8, 2018 06:25
8-bit (unsigned) floating point encoding that is designed to be very efficient to decode on DX9/GLES2 class GPUs
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| // Can be used to efficiently encode floating point values from a limited range ([0..65k]) into a byte | |
| // edgeDecode is optimized for GPUs (native exp2) | |
| // edgeEncode1 is optimized for GPUs (native log2) | |
| // edgeEncode2 is optimized for CPUs but is an approximation | |
| // edgeEncode3 is optimized for CPUs | |
| float edgeDecode(int e) | |
| { | |
| return exp2f(float(e) * (1 / 16.f)) - 1; | |
| } |