bool writes_stencil; /**< does fragment shader write stencil value? */
bool writes_samplemask; /**< does fragment shader write sample mask? */
bool writes_edgeflag; /**< vertex shader outputs edgeflag */
- bool uses_kill; /**< KILL or KILL_IF instruction used? */
bool uses_persp_center;
bool uses_persp_centroid;
bool uses_persp_sample;