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* Copyright © 2016 Intel Corporation
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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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* 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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* 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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#include "nir_builder.h"
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#include "lvp_lower_vulkan_resource.h"
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load_frag_coord(nir_builder *b)
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nir_find_variable_with_location(b->shader, nir_var_shader_in,
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pos = nir_variable_create(b->shader, nir_var_shader_in,
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glsl_vec4_type(), NULL);
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pos->data.location = VARYING_SLOT_POS;
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* "The OriginLowerLeft execution mode must not be used; fragment entry
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* points must declare OriginUpperLeft."
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* So at this point origin_upper_left should be true
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assert(b->shader->info.fs.origin_upper_left == true);
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return nir_load_var(b, pos);
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try_lower_input_load(nir_function_impl *impl, nir_intrinsic_instr *load,
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bool use_fragcoord_sysval)
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nir_deref_instr *deref = nir_src_as_deref(load->src[0]);
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assert(glsl_type_is_image(deref->type));
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enum glsl_sampler_dim image_dim = glsl_get_sampler_dim(deref->type);
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if (image_dim != GLSL_SAMPLER_DIM_SUBPASS &&
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image_dim != GLSL_SAMPLER_DIM_SUBPASS_MS)
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nir_builder_init(&b, impl);
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b.cursor = nir_before_instr(&load->instr);
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nir_ssa_def *frag_coord = use_fragcoord_sysval ? nir_load_frag_coord(&b)
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: load_frag_coord(&b);
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frag_coord = nir_f2i32(&b, frag_coord);
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nir_ssa_def *offset = nir_ssa_for_src(&b, load->src[1], 2);
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nir_ssa_def *pos = nir_iadd(&b, frag_coord, offset);
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nir_ssa_def *layer = nir_load_view_index(&b);
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nir_vec4(&b, nir_channel(&b, pos, 0), nir_channel(&b, pos, 1), layer, nir_imm_int(&b, 0));
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nir_instr_rewrite_src(&load->instr, &load->src[1], nir_src_for_ssa(coord));
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lvp_lower_input_attachments(nir_shader *shader, bool use_fragcoord_sysval)
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assert(shader->info.stage == MESA_SHADER_FRAGMENT);
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bool progress = false;
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nir_foreach_function(function, shader) {
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nir_foreach_block(block, function->impl) {
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nir_foreach_instr_safe(instr, block) {
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if (instr->type != nir_instr_type_intrinsic)
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nir_intrinsic_instr *load = nir_instr_as_intrinsic(instr);
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if (load->intrinsic != nir_intrinsic_image_deref_load)
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progress |= try_lower_input_load(function->impl, load,
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use_fragcoord_sysval);