* the primitive was split (we split rendering into chunks of at
* most 4095-vertices) we need to back out the original start
* index out of our vertex id here.
+ * for ARB_shader_draw_parameters, base_vertex should be 0 for non-indexed draws.
*/
- system_values.basevertex = lp_build_broadcast_scalar(&blduivec,
- vertex_id_offset);
+ LLVMValueRef base_vertex = lp_build_select(&bld, have_elts, vertex_id_offset, lp_build_const_int32(gallivm, 0));;
+ system_values.basevertex = lp_build_broadcast_scalar(&blduivec, base_vertex);
system_values.vertex_id = true_index_array;
system_values.vertex_id_nobase = LLVMBuildSub(builder, true_index_array,
- system_values.basevertex, "");
+ lp_build_broadcast_scalar(&blduivec, vertex_id_offset), "");
ptr_aos = (const LLVMValueRef (*)[TGSI_NUM_CHANNELS]) inputs;
generate_vs(variant,
case nir_intrinsic_load_primitive_id:
case nir_intrinsic_load_instance_id:
case nir_intrinsic_load_base_instance:
+ case nir_intrinsic_load_base_vertex:
case nir_intrinsic_load_work_group_id:
case nir_intrinsic_load_local_invocation_id:
case nir_intrinsic_load_num_work_groups:
case nir_intrinsic_load_base_instance:
result[0] = lp_build_broadcast_scalar(&bld_base->uint_bld, bld->system_values.base_instance);
break;
+ case nir_intrinsic_load_base_vertex:
+ result[0] = bld->system_values.basevertex;
+ break;
case nir_intrinsic_load_vertex_id:
result[0] = bld->system_values.vertex_id;
break;