static void maybe_do_clip_tri( struct brw_clip_compile *c ) { struct brw_compile *p = &c->func; brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_NZ, c->reg.planemask, brw_imm_ud(0)); brw_IF(p, BRW_EXECUTE_1); { do_clip_tri(c); } brw_ENDIF(p); }
static void clip_tri( struct draw_stage *stage, struct prim_header *header ) { unsigned clipmask = (header->v[0]->clipmask | header->v[1]->clipmask | header->v[2]->clipmask); if (clipmask == 0) { /* no clipping needed */ stage->next->tri( stage->next, header ); } else if ((header->v[0]->clipmask & header->v[1]->clipmask & header->v[2]->clipmask) == 0) { do_clip_tri(stage, header, clipmask); } }
void brw_emit_tri_clip( struct brw_clip_compile *c ) { struct brw_instruction *neg_rhw; struct brw_compile *p = &c->func; brw_clip_tri_alloc_regs(c, 3 + c->key.nr_userclip + 6); brw_clip_tri_init_vertices(c); brw_clip_init_clipmask(c); brw_clip_init_ff_sync(c); /* if -ve rhw workaround bit is set, do cliptest */ if (c->chipset.is_965) { brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); brw_AND(p, brw_null_reg(), get_element_ud(c->reg.R0, 2), brw_imm_ud(1<<20)); neg_rhw = brw_IF(p, BRW_EXECUTE_1); { brw_clip_test(c); } brw_ENDIF(p, neg_rhw); } /* Can't push into do_clip_tri because with polygon (or quad) * flatshading, need to apply the flatshade here because we don't * respect the PV when converting to trifan for emit: */ if (c->key.do_flat_shading) brw_clip_tri_flat_shade(c); if ((c->key.clip_mode == BRW_CLIPMODE_NORMAL) || (c->key.clip_mode == BRW_CLIPMODE_KERNEL_CLIP)) do_clip_tri(c); else maybe_do_clip_tri(c); brw_clip_tri_emit_polygon(c); /* Send an empty message to kill the thread: */ brw_clip_kill_thread(c); }