109 lines
4.1 KiB
C
109 lines
4.1 KiB
C
/*
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* Copyright © 2013 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "brw_compiler.h"
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#include "compiler/nir/nir.h"
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static char const *get_qual_name(int mode)
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{
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switch (mode) {
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case INTERP_MODE_NONE: return "none";
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case INTERP_MODE_FLAT: return "flat";
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case INTERP_MODE_SMOOTH: return "smooth";
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case INTERP_MODE_NOPERSPECTIVE: return "nopersp";
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default: return "???";
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}
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}
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static void
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gfx4_frag_prog_set_interp_modes(struct brw_wm_prog_data *prog_data,
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const struct brw_vue_map *vue_map,
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unsigned location, unsigned slot_count,
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enum glsl_interp_mode interp)
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{
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for (unsigned k = 0; k < slot_count; k++) {
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unsigned slot = vue_map->varying_to_slot[location + k];
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if (slot != -1 && prog_data->interp_mode[slot] == INTERP_MODE_NONE) {
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prog_data->interp_mode[slot] = interp;
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if (prog_data->interp_mode[slot] == INTERP_MODE_FLAT) {
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prog_data->contains_flat_varying = true;
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} else if (prog_data->interp_mode[slot] == INTERP_MODE_NOPERSPECTIVE) {
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prog_data->contains_noperspective_varying = true;
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}
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}
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}
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}
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/* Set up interpolation modes for every element in the VUE */
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void
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brw_setup_vue_interpolation(const struct brw_vue_map *vue_map, nir_shader *nir,
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struct brw_wm_prog_data *prog_data)
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{
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/* Initialise interp_mode. INTERP_MODE_NONE == 0 */
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memset(prog_data->interp_mode, 0, sizeof(prog_data->interp_mode));
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if (!vue_map)
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return;
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/* HPOS always wants noperspective. setting it up here allows
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* us to not need special handling in the SF program.
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*/
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unsigned pos_slot = vue_map->varying_to_slot[VARYING_SLOT_POS];
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if (pos_slot != -1) {;
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prog_data->interp_mode[pos_slot] = INTERP_MODE_NOPERSPECTIVE;
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prog_data->contains_noperspective_varying = true;
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}
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nir_foreach_shader_in_variable(var, nir) {
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unsigned location = var->data.location;
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unsigned slot_count = glsl_count_attribute_slots(var->type, false);
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gfx4_frag_prog_set_interp_modes(prog_data, vue_map, location, slot_count,
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var->data.interpolation);
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if (location == VARYING_SLOT_COL0 || location == VARYING_SLOT_COL1) {
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location = location + VARYING_SLOT_BFC0 - VARYING_SLOT_COL0;
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gfx4_frag_prog_set_interp_modes(prog_data, vue_map, location,
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slot_count, var->data.interpolation);
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}
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}
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const bool debug = false;
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if (debug) {
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fprintf(stderr, "VUE map:\n");
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for (int i = 0; i < vue_map->num_slots; i++) {
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int varying = vue_map->slot_to_varying[i];
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if (varying == -1) {
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fprintf(stderr, "%d: --\n", i);
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continue;
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}
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fprintf(stderr, "%d: %d %s ofs %d\n",
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i, varying,
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get_qual_name(prog_data->interp_mode[i]),
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brw_vue_slot_to_offset(i));
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}
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}
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}
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