Gpu size calc helper (#1816)
Gpu size calc helper (#1816)

* add helper for calculating gpu memory requirement for textures
playcanvas/engine,sereepap2029/playcanvas,sereepap2029/playcanvas,playcanvas/engine,MicroWorldwide/PlayCanvas,aidinabedi/playcanvas-engine,MicroWorldwide/PlayCanvas,aidinabedi/playcanvas-engine,sereepap2029/playcanvas