Element-texture width in texels — a session constant, forced to a multiple of the layout's texels-per-element so an element's texels always share one row (the shader fetches base + k on x only; a row straddle would read garbage).
base + k
Element-texture width in texels — a session constant, forced to a multiple of the layout's texels-per-element so an element's texels always share one row (the shader fetches
base + kon x only; a row straddle would read garbage).