diff options
Diffstat (limited to 'src/intel/compiler/brw_interpolation_map.c')
| -rw-r--r-- | src/intel/compiler/brw_interpolation_map.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/src/intel/compiler/brw_interpolation_map.c b/src/intel/compiler/brw_interpolation_map.c new file mode 100644 index 00000000000..7b9f58eb6ee --- /dev/null +++ b/src/intel/compiler/brw_interpolation_map.c @@ -0,0 +1,109 @@ +/* + * Copyright © 2013 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include "brw_compiler.h" +#include "compiler/nir/nir.h" + +static char const *get_qual_name(int mode) +{ + switch (mode) { + case INTERP_MODE_NONE: return "none"; + case INTERP_MODE_FLAT: return "flat"; + case INTERP_MODE_SMOOTH: return "smooth"; + case INTERP_MODE_NOPERSPECTIVE: return "nopersp"; + default: return "???"; + } +} + +static void +gen4_frag_prog_set_interp_modes(struct brw_wm_prog_data *prog_data, + struct brw_vue_map *vue_map, + unsigned location, unsigned slot_count, + enum glsl_interp_mode interp) +{ + for (unsigned k = 0; k < slot_count; k++) { + unsigned slot = vue_map->varying_to_slot[location + k]; + if (slot != -1 && prog_data->interp_mode[slot] == INTERP_MODE_NONE) { + prog_data->interp_mode[slot] = interp; + + if (prog_data->interp_mode[slot] == INTERP_MODE_FLAT) { + prog_data->contains_flat_varying = true; + } else if (prog_data->interp_mode[slot] == INTERP_MODE_NOPERSPECTIVE) { + prog_data->contains_noperspective_varying = true; + } + } + } +} + +/* Set up interpolation modes for every element in the VUE */ +void +brw_setup_vue_interpolation(struct brw_vue_map *vue_map, nir_shader *nir, + struct brw_wm_prog_data *prog_data, + const struct gen_device_info *devinfo) +{ + /* Initialise interp_mode. INTERP_MODE_NONE == 0 */ + memset(prog_data->interp_mode, 0, sizeof(prog_data->interp_mode)); + + if (!vue_map) + return; + + /* HPOS always wants noperspective. setting it up here allows + * us to not need special handling in the SF program. + */ + unsigned pos_slot = vue_map->varying_to_slot[VARYING_SLOT_POS]; + if (pos_slot != -1) {; + prog_data->interp_mode[pos_slot] = INTERP_MODE_NOPERSPECTIVE; + prog_data->contains_noperspective_varying = true; + } + + foreach_list_typed(nir_variable, var, node, &nir->inputs) { + unsigned location = var->data.location; + unsigned slot_count = glsl_count_attribute_slots(var->type, false); + + gen4_frag_prog_set_interp_modes(prog_data, vue_map, location, slot_count, + var->data.interpolation); + + if (location == VARYING_SLOT_COL0 || location == VARYING_SLOT_COL1) { + location = location + VARYING_SLOT_BFC0 - VARYING_SLOT_COL0; + gen4_frag_prog_set_interp_modes(prog_data, vue_map, location, + slot_count, var->data.interpolation); + } + } + + bool debug = false; + if (debug) { + fprintf(stderr, "VUE map:\n"); + for (int i = 0; i < vue_map->num_slots; i++) { + int varying = vue_map->slot_to_varying[i]; + if (varying == -1) { + fprintf(stderr, "%d: --\n", i); + continue; + } + + fprintf(stderr, "%d: %d %s ofs %d\n", + i, varying, + get_qual_name(prog_data->interp_mode[i]), + brw_vue_slot_to_offset(i)); + } + } +} |