Decodes one read-back RGBA8 texel into the id value the pass wrote: 0 for "nothing" (the clear), otherwise the candidate's table index + 1 — encodePickId's inverse. Exact for every id up to MAX_PICK_CANDIDATES (the sum stays far below 2⁵³).
0
Decodes one read-back RGBA8 texel into the id value the pass wrote:
0for "nothing" (the clear), otherwise the candidate's table index + 1 — encodePickId's inverse. Exact for every id up to MAX_PICK_CANDIDATES (the sum stays far below 2⁵³).