1/* 2 * Copyright © 2015 Red Hat 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 */ 23 24#include "nir.h" 25#include "nir_builder.h" 26 27static void 28lower_impl(nir_function_impl *impl) 29{ 30 nir_shader *shader = impl->function->shader; 31 nir_builder b; 32 nir_variable *in, *out; 33 nir_ssa_def *def; 34 35 nir_builder_init(&b, impl); 36 b.cursor = nir_before_cf_list(&impl->body); 37 38 in = nir_variable_create(shader, nir_var_shader_in, 39 glsl_vec4_type(), "edgeflag_in"); 40 in->data.location = VERT_ATTRIB_EDGEFLAG; 41 42 out = nir_variable_create(shader, nir_var_shader_out, 43 glsl_vec4_type(), "edgeflag_out"); 44 out->data.location = VARYING_SLOT_EDGE; 45 46 def = nir_load_var(&b, in); 47 nir_store_var(&b, out, def, 0xf); 48 49 nir_metadata_preserve(impl, nir_metadata_block_index | 50 nir_metadata_dominance); 51} 52 53void nir_lower_passthrough_edgeflags(nir_shader *shader) 54{ 55 lower_impl(nir_shader_get_entrypoint(shader)); 56} 57