Calculate compressed byte size per-mip, not always from top mip size
Calculate compressed byte size per-mip, not always from top mip size

googlestadia/renderdoc,Velro/renderdoc,TurtleRockStudios/renderdoc_public,etnlGD/renderdoc,victor-moya/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,googlestadia/renderdoc,etnlGD/renderdoc,cgmb/renderdoc,TurtleRockStudios/renderdoc_public,Zorro666/renderdoc,michaelrgb/renderdoc,baldurk/renderdoc,victor-moya/renderdoc,cgmb/renderdoc,michaelrgb/renderdoc,cgmb/renderdoc,victor-moya/renderdoc,Velro/renderdoc,Zorro666/renderdoc,michaelrgb/renderdoc,Yours3lf/renderdoc,baldurk/renderdoc,TurtleRockStudios/renderdoc_public,Velro/renderdoc,googlestadia/renderdoc,Velro/renderdoc,Yours3lf/renderdoc,Lssikkes/renderdoc,etnlGD/renderdoc,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,Yours3lf/renderdoc,Velro/renderdoc,baldurk/renderdoc,googlestadia/renderdoc,michaelrgb/renderdoc,etnlGD/renderdoc,Yours3lf/renderdoc,TurtleRockStudios/renderdoc_public,Velro/renderdoc,victor-moya/renderdoc,Zorro666/renderdoc,Lssikkes/renderdoc,Lssikkes/renderdoc,michaelrgb/renderdoc,Lssikkes/renderdoc,googlestadia/renderdoc,victor-moya/renderdoc,etnlGD/renderdoc,Lssikkes/renderdoc,cgmb/renderdoc,etnlGD/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,Yours3lf/renderdoc,Yours3lf/renderdoc,victor-moya/renderdoc,Zorro666/renderdoc,cgmb/renderdoc,Lssikkes/renderdoc,baldurk/renderdoc,baldurk/renderdoc