+++ /dev/null
-/*
- * Copyright (C) 2005-2007 Brian Paul All Rights Reserved.
- * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
- * Copyright © 2014 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 "nir.h"
-#include "nir_builder.h"
-#include "../program.h"
-#include "program/hash_table.h"
-#include "ir_uniform.h"
-
-extern "C" {
-#include "main/compiler.h"
-#include "main/mtypes.h"
-#include "program/prog_parameter.h"
-#include "program/program.h"
-}
-
-/* Calculate the sampler index based on array indicies and also
- * calculate the base uniform location for struct members.
- */
-static void
-calc_sampler_offsets(nir_deref *tail, nir_tex_instr *instr,
- unsigned *array_elements, nir_ssa_def **indirect,
- nir_builder *b, unsigned *location)
-{
- if (tail->child == NULL)
- return;
-
- switch (tail->child->deref_type) {
- case nir_deref_type_array: {
- nir_deref_array *deref_array = nir_deref_as_array(tail->child);
-
- assert(deref_array->deref_array_type != nir_deref_array_type_wildcard);
-
- calc_sampler_offsets(tail->child, instr, array_elements,
- indirect, b, location);
- instr->sampler_index += deref_array->base_offset * *array_elements;
-
- if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
- nir_ssa_def *mul =
- nir_imul(b, nir_imm_int(b, *array_elements),
- nir_ssa_for_src(b, deref_array->indirect, 1));
-
- nir_instr_rewrite_src(&instr->instr, &deref_array->indirect,
- NIR_SRC_INIT);
-
- if (*indirect) {
- *indirect = nir_iadd(b, *indirect, mul);
- } else {
- *indirect = mul;
- }
- }
-
- *array_elements *= glsl_get_length(tail->type);
- break;
- }
-
- case nir_deref_type_struct: {
- nir_deref_struct *deref_struct = nir_deref_as_struct(tail->child);
- *location += tail->type->record_location_offset(deref_struct->index);
- calc_sampler_offsets(tail->child, instr, array_elements,
- indirect, b, location);
- break;
- }
-
- default:
- unreachable("Invalid deref type");
- break;
- }
-}
-
-static void
-lower_sampler(nir_tex_instr *instr, const struct gl_shader_program *shader_program,
- gl_shader_stage stage, nir_builder *builder)
-{
- if (instr->sampler == NULL)
- return;
-
- instr->sampler_index = 0;
- unsigned location = instr->sampler->var->data.location;
- unsigned array_elements = 1;
- nir_ssa_def *indirect = NULL;
-
- builder->cursor = nir_before_instr(&instr->instr);
- calc_sampler_offsets(&instr->sampler->deref, instr, &array_elements,
- &indirect, builder, &location);
-
- if (indirect) {
- /* First, we have to resize the array of texture sources */
- nir_tex_src *new_srcs = rzalloc_array(instr, nir_tex_src,
- instr->num_srcs + 1);
-
- for (unsigned i = 0; i < instr->num_srcs; i++) {
- new_srcs[i].src_type = instr->src[i].src_type;
- nir_instr_move_src(&instr->instr, &new_srcs[i].src,
- &instr->src[i].src);
- }
-
- ralloc_free(instr->src);
- instr->src = new_srcs;
-
- /* Now we can go ahead and move the source over to being a
- * first-class texture source.
- */
- instr->src[instr->num_srcs].src_type = nir_tex_src_sampler_offset;
- instr->num_srcs++;
- nir_instr_rewrite_src(&instr->instr,
- &instr->src[instr->num_srcs - 1].src,
- nir_src_for_ssa(indirect));
-
- instr->sampler_array_size = array_elements;
- }
-
- if (location > shader_program->NumUniformStorage - 1 ||
- !shader_program->UniformStorage[location].sampler[stage].active) {
- assert(!"cannot return a sampler");
- return;
- }
-
- instr->sampler_index +=
- shader_program->UniformStorage[location].sampler[stage].index;
-
- instr->sampler = NULL;
-}
-
-typedef struct {
- nir_builder builder;
- const struct gl_shader_program *shader_program;
- gl_shader_stage stage;
-} lower_state;
-
-static bool
-lower_block_cb(nir_block *block, void *_state)
-{
- lower_state *state = (lower_state *) _state;
-
- nir_foreach_instr(block, instr) {
- if (instr->type == nir_instr_type_tex) {
- nir_tex_instr *tex_instr = nir_instr_as_tex(instr);
- lower_sampler(tex_instr, state->shader_program, state->stage,
- &state->builder);
- }
- }
-
- return true;
-}
-
-static void
-lower_impl(nir_function_impl *impl, const struct gl_shader_program *shader_program,
- gl_shader_stage stage)
-{
- lower_state state;
-
- nir_builder_init(&state.builder, impl);
- state.shader_program = shader_program;
- state.stage = stage;
-
- nir_foreach_block(impl, lower_block_cb, &state);
-}
-
-extern "C" void
-nir_lower_samplers(nir_shader *shader,
- const struct gl_shader_program *shader_program)
-{
- nir_foreach_overload(shader, overload) {
- if (overload->impl)
- lower_impl(overload->impl, shader_program, shader->stage);
- }
-}
projects / mesa.git / blobdiff