226 lines
7.3 KiB
C
226 lines
7.3 KiB
C
/*
|
|
* Copyright © 2016 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"
|
|
|
|
static nir_ssa_def *
|
|
load_frag_coord(const nir_input_attachment_options *options, nir_builder *b)
|
|
{
|
|
if (options->use_fragcoord_sysval)
|
|
return nir_load_frag_coord(b);
|
|
|
|
nir_variable *pos =
|
|
nir_find_variable_with_location(b->shader, nir_var_shader_in,
|
|
VARYING_SLOT_POS);
|
|
if (pos == NULL) {
|
|
pos = nir_variable_create(b->shader, nir_var_shader_in,
|
|
glsl_vec4_type(), NULL);
|
|
pos->data.location = VARYING_SLOT_POS;
|
|
}
|
|
/**
|
|
* From Vulkan spec:
|
|
* "The OriginLowerLeft execution mode must not be used; fragment entry
|
|
* points must declare OriginUpperLeft."
|
|
*
|
|
* So at this point origin_upper_left should be true
|
|
*/
|
|
assert(b->shader->info.fs.origin_upper_left == true);
|
|
|
|
return nir_load_var(b, pos);
|
|
}
|
|
|
|
static nir_ssa_def *
|
|
load_layer_id(const nir_input_attachment_options *options, nir_builder *b)
|
|
{
|
|
if (options->use_layer_id_sysval) {
|
|
if (options->use_view_id_for_layer)
|
|
return nir_load_view_index(b);
|
|
else
|
|
return nir_load_layer_id(b);
|
|
}
|
|
|
|
gl_varying_slot slot = options->use_view_id_for_layer ?
|
|
VARYING_SLOT_VIEW_INDEX : VARYING_SLOT_LAYER;
|
|
nir_variable *layer_id =
|
|
nir_find_variable_with_location(b->shader, nir_var_shader_in, slot);
|
|
|
|
if (layer_id == NULL) {
|
|
layer_id = nir_variable_create(b->shader, nir_var_shader_in,
|
|
glsl_int_type(), NULL);
|
|
layer_id->data.location = slot;
|
|
layer_id->data.interpolation = INTERP_MODE_FLAT;
|
|
layer_id->data.driver_location = b->shader->num_inputs++;
|
|
}
|
|
|
|
return nir_load_var(b, layer_id);
|
|
}
|
|
|
|
static bool
|
|
try_lower_input_load(nir_function_impl *impl, nir_intrinsic_instr *load,
|
|
const nir_input_attachment_options *options)
|
|
{
|
|
nir_deref_instr *deref = nir_src_as_deref(load->src[0]);
|
|
assert(glsl_type_is_image(deref->type));
|
|
|
|
enum glsl_sampler_dim image_dim = glsl_get_sampler_dim(deref->type);
|
|
if (image_dim != GLSL_SAMPLER_DIM_SUBPASS &&
|
|
image_dim != GLSL_SAMPLER_DIM_SUBPASS_MS)
|
|
return false;
|
|
|
|
const bool multisampled = (image_dim == GLSL_SAMPLER_DIM_SUBPASS_MS);
|
|
|
|
nir_builder b;
|
|
nir_builder_init(&b, impl);
|
|
b.cursor = nir_instr_remove(&load->instr);
|
|
|
|
nir_ssa_def *frag_coord = load_frag_coord(options, &b);
|
|
frag_coord = nir_f2i32(&b, frag_coord);
|
|
nir_ssa_def *offset = nir_ssa_for_src(&b, load->src[1], 2);
|
|
nir_ssa_def *pos = nir_iadd(&b, frag_coord, offset);
|
|
|
|
nir_ssa_def *layer = load_layer_id(options, &b);
|
|
nir_ssa_def *coord =
|
|
nir_vec3(&b, nir_channel(&b, pos, 0), nir_channel(&b, pos, 1), layer);
|
|
|
|
nir_tex_instr *tex = nir_tex_instr_create(b.shader, 3 + multisampled);
|
|
|
|
tex->op = nir_texop_txf;
|
|
tex->sampler_dim = image_dim;
|
|
|
|
switch (glsl_get_sampler_result_type(deref->type)) {
|
|
case GLSL_TYPE_FLOAT:
|
|
tex->dest_type = nir_type_float;
|
|
break;
|
|
case GLSL_TYPE_INT:
|
|
tex->dest_type = nir_type_int;
|
|
break;
|
|
case GLSL_TYPE_UINT:
|
|
tex->dest_type = nir_type_uint;
|
|
break;
|
|
default:
|
|
unreachable("Invalid image type");
|
|
}
|
|
tex->is_array = true;
|
|
tex->is_shadow = false;
|
|
|
|
tex->texture_index = 0;
|
|
tex->sampler_index = 0;
|
|
|
|
tex->src[0].src_type = nir_tex_src_texture_deref;
|
|
tex->src[0].src = nir_src_for_ssa(&deref->dest.ssa);
|
|
|
|
tex->src[1].src_type = nir_tex_src_coord;
|
|
tex->src[1].src = nir_src_for_ssa(coord);
|
|
tex->coord_components = 3;
|
|
|
|
tex->src[2].src_type = nir_tex_src_lod;
|
|
tex->src[2].src = nir_src_for_ssa(nir_imm_int(&b, 0));
|
|
|
|
if (image_dim == GLSL_SAMPLER_DIM_SUBPASS_MS) {
|
|
tex->op = nir_texop_txf_ms;
|
|
tex->src[3].src_type = nir_tex_src_ms_index;
|
|
tex->src[3].src = load->src[2];
|
|
}
|
|
|
|
tex->texture_non_uniform = nir_intrinsic_access(load) & ACCESS_NON_UNIFORM;
|
|
|
|
nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, NULL);
|
|
nir_builder_instr_insert(&b, &tex->instr);
|
|
|
|
nir_ssa_def_rewrite_uses(&load->dest.ssa,
|
|
nir_src_for_ssa(&tex->dest.ssa));
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
try_lower_input_texop(nir_function_impl *impl, nir_tex_instr *tex,
|
|
const nir_input_attachment_options *options)
|
|
{
|
|
nir_deref_instr *deref = nir_src_as_deref(tex->src[0].src);
|
|
|
|
if (glsl_get_sampler_dim(deref->type) != GLSL_SAMPLER_DIM_SUBPASS_MS)
|
|
return false;
|
|
|
|
nir_builder b;
|
|
nir_builder_init(&b, impl);
|
|
b.cursor = nir_before_instr(&tex->instr);
|
|
|
|
nir_ssa_def *frag_coord = load_frag_coord(options, &b);
|
|
frag_coord = nir_f2i32(&b, frag_coord);
|
|
|
|
nir_ssa_def *layer = load_layer_id(options, &b);
|
|
nir_ssa_def *coord = nir_vec3(&b, nir_channel(&b, frag_coord, 0),
|
|
nir_channel(&b, frag_coord, 1), layer);
|
|
|
|
tex->coord_components = 3;
|
|
|
|
nir_instr_rewrite_src(&tex->instr, &tex->src[1].src, nir_src_for_ssa(coord));
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nir_lower_input_attachments(nir_shader *shader,
|
|
const nir_input_attachment_options *options)
|
|
{
|
|
assert(shader->info.stage == MESA_SHADER_FRAGMENT);
|
|
bool progress = false;
|
|
|
|
nir_foreach_function(function, shader) {
|
|
if (!function->impl)
|
|
continue;
|
|
|
|
nir_foreach_block(block, function->impl) {
|
|
nir_foreach_instr_safe(instr, block) {
|
|
switch (instr->type) {
|
|
case nir_instr_type_tex: {
|
|
nir_tex_instr *tex = nir_instr_as_tex(instr);
|
|
|
|
if (tex->op == nir_texop_fragment_mask_fetch ||
|
|
tex->op == nir_texop_fragment_fetch) {
|
|
progress |= try_lower_input_texop(function->impl, tex,
|
|
options);
|
|
}
|
|
break;
|
|
}
|
|
case nir_instr_type_intrinsic: {
|
|
nir_intrinsic_instr *load = nir_instr_as_intrinsic(instr);
|
|
|
|
if (load->intrinsic == nir_intrinsic_image_deref_load) {
|
|
progress |= try_lower_input_load(function->impl, load,
|
|
options);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return progress;
|
|
}
|