D871 - A two-channel 16_16 UNORM target is drawn through R16G16_UNORM

Status: decided Date: 2026-10-14

A colour target whose CB_COLOR0_INFO names COLOR_16_16, NUMBER_UNORM and SWAP_STD holds two normalised 16-bit channels a texel, red then green (XY__). It is four bytes a texel, placed by the 32-bpp layout, and drawn through R16G16_UNORM, its words moved in and out as they are held and red and green written - as its FLOAT twin is through R16G16_SFLOAT (D847).

Why: COLOR_16_16 is 5 and NUMBER_UNORM 0 (gfx103.json). Grand Theft Auto V's eighteenth submission draws into such a target once its first seventeen run (D866, D868-D870).