mirror of https://gitlab.freedesktop.org/mesa/mesa
322 lines
11 KiB
C
322 lines
11 KiB
C
/*
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* Copyright © 2017 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 "nir/nir.h"
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#include "nir/nir_builder.h"
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#include "nir/nir_vulkan.h"
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#include "radv_private.h"
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#include "radv_shader.h"
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#include "vk_format.h"
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struct ycbcr_state {
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nir_builder *builder;
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nir_ssa_def *image_size;
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nir_tex_instr *origin_tex;
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nir_deref_instr *tex_deref;
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const struct radv_sampler_ycbcr_conversion_state *conversion;
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bool unnormalized_coordinates;
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};
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static nir_ssa_def *
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get_texture_size(struct ycbcr_state *state, nir_deref_instr *texture)
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{
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nir_builder *b = state->builder;
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const struct glsl_type *type = texture->type;
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nir_tex_instr *tex = nir_tex_instr_create(b->shader, 1);
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tex->op = nir_texop_txs;
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tex->sampler_dim = glsl_get_sampler_dim(type);
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tex->is_array = glsl_sampler_type_is_array(type);
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tex->is_shadow = glsl_sampler_type_is_shadow(type);
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tex->dest_type = nir_type_int32;
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tex->src[0].src_type = nir_tex_src_texture_deref;
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tex->src[0].src = nir_src_for_ssa(&texture->dest.ssa);
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nir_ssa_dest_init(&tex->instr, &tex->dest, nir_tex_instr_dest_size(tex), 32, NULL);
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nir_builder_instr_insert(b, &tex->instr);
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state->builder->shader->info.uses_resource_info_query = true;
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return nir_i2f32(b, &tex->dest.ssa);
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}
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static nir_ssa_def *
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implicit_downsampled_coord(nir_builder *b, nir_ssa_def *value, nir_ssa_def *max_value,
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int div_scale)
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{
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return nir_fadd(
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b, value,
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nir_fdiv(b, nir_imm_float(b, 1.0f), nir_fmul(b, nir_imm_float(b, div_scale), max_value)));
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}
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static nir_ssa_def *
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implicit_downsampled_coord_unnormalized(nir_builder *b, nir_ssa_def *value, int div_scale)
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{
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return nir_fadd(
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b, value,
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nir_imm_float(b, 1.0f / (float)div_scale));
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}
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static nir_ssa_def *
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implicit_downsampled_coords(struct ycbcr_state *state, nir_ssa_def *old_coords)
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{
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nir_builder *b = state->builder;
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const struct radv_sampler_ycbcr_conversion_state *conversion = state->conversion;
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nir_ssa_def *image_size = NULL;
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nir_ssa_def *comp[4] = {
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NULL,
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};
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enum pipe_video_chroma_format chroma_format =
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pipe_format_to_chroma_format(vk_format_to_pipe_format(state->conversion->format));
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const unsigned divisors[2] = {chroma_format <= PIPE_VIDEO_CHROMA_FORMAT_422 ? 2 : 1,
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chroma_format <= PIPE_VIDEO_CHROMA_FORMAT_420 ? 2 : 1};
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for (int c = 0; c < old_coords->num_components; c++) {
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comp[c] = nir_channel(b, old_coords, c);
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if (c < ARRAY_SIZE(divisors) && divisors[c] > 1) {
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if (state->unnormalized_coordinates)
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comp[c] = nir_fdiv(b, comp[c], nir_imm_float(b, divisors[c]));
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if (conversion->chroma_offsets[c] == VK_CHROMA_LOCATION_COSITED_EVEN) {
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if (state->unnormalized_coordinates) {
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comp[c] = implicit_downsampled_coord_unnormalized(b, comp[c], divisors[c]);
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} else {
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if (!image_size)
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image_size = get_texture_size(state, state->tex_deref);
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comp[c] = implicit_downsampled_coord(b, comp[c], nir_channel(b, image_size, c), divisors[c]);
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}
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}
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}
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}
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return nir_vec(b, comp, old_coords->num_components);
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}
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static nir_ssa_def *
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create_plane_tex_instr_implicit(struct ycbcr_state *state, uint32_t plane)
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{
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nir_builder *b = state->builder;
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nir_tex_instr *old_tex = state->origin_tex;
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nir_tex_instr *tex = nir_tex_instr_create(b->shader, old_tex->num_srcs + 1);
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for (uint32_t i = 0; i < old_tex->num_srcs; i++) {
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tex->src[i].src_type = old_tex->src[i].src_type;
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switch (old_tex->src[i].src_type) {
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case nir_tex_src_coord:
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if (plane && true /*state->conversion->chroma_reconstruction*/) {
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assert(old_tex->src[i].src.is_ssa);
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tex->src[i].src =
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nir_src_for_ssa(implicit_downsampled_coords(state, old_tex->src[i].src.ssa));
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break;
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}
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FALLTHROUGH;
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default:
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nir_src_copy(&tex->src[i].src, &old_tex->src[i].src, &tex->instr);
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break;
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}
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}
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tex->src[tex->num_srcs - 1].src = nir_src_for_ssa(nir_imm_int(b, plane));
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tex->src[tex->num_srcs - 1].src_type = nir_tex_src_plane;
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tex->sampler_dim = old_tex->sampler_dim;
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tex->dest_type = old_tex->dest_type;
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tex->is_array = old_tex->is_array;
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tex->op = old_tex->op;
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tex->coord_components = old_tex->coord_components;
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tex->is_new_style_shadow = old_tex->is_new_style_shadow;
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tex->component = old_tex->component;
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tex->texture_index = old_tex->texture_index;
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tex->sampler_index = old_tex->sampler_index;
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nir_ssa_dest_init(&tex->instr, &tex->dest, old_tex->dest.ssa.num_components,
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nir_dest_bit_size(old_tex->dest), NULL);
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nir_builder_instr_insert(b, &tex->instr);
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return &tex->dest.ssa;
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}
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struct swizzle_info {
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unsigned plane[4];
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unsigned swizzle[4];
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};
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static struct swizzle_info
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get_plane_swizzles(VkFormat format)
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{
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int planes = vk_format_get_plane_count(format);
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switch (planes) {
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case 3:
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return (struct swizzle_info){{2, 0, 1, 0}, {0, 0, 0, 3}};
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case 2:
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return (struct swizzle_info){{1, 0, 1, 0}, {1, 0, 0, 3}};
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case 1:
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return (struct swizzle_info){{0, 0, 0, 0}, {0, 1, 2, 3}};
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default:
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unreachable("unhandled plane count for ycbcr swizzling");
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}
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}
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static nir_ssa_def *
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build_swizzled_components(nir_builder *builder, VkFormat format, VkComponentMapping mapping,
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nir_ssa_def **plane_values)
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{
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struct swizzle_info plane_swizzle = get_plane_swizzles(format);
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enum pipe_swizzle swizzles[4];
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nir_ssa_def *values[4];
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vk_format_compose_swizzles(&mapping, (const unsigned char[4]){0, 1, 2, 3}, swizzles);
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nir_ssa_def *zero = nir_imm_float(builder, 0.0f);
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nir_ssa_def *one = nir_imm_float(builder, 1.0f);
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for (unsigned i = 0; i < 4; ++i) {
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switch (swizzles[i]) {
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case PIPE_SWIZZLE_X:
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case PIPE_SWIZZLE_Y:
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case PIPE_SWIZZLE_Z:
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case PIPE_SWIZZLE_W: {
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unsigned channel = swizzles[i] - PIPE_SWIZZLE_X;
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values[i] = nir_channel(builder, plane_values[plane_swizzle.plane[channel]],
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plane_swizzle.swizzle[channel]);
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break;
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}
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case PIPE_SWIZZLE_0:
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values[i] = zero;
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break;
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case PIPE_SWIZZLE_1:
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values[i] = one;
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break;
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default:
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unreachable("unhandled swizzle");
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}
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}
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return nir_vec(builder, values, 4);
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}
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static bool
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try_lower_tex_ycbcr(const struct radv_pipeline_layout *layout, nir_builder *builder,
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nir_tex_instr *tex)
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{
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int deref_src_idx = nir_tex_instr_src_index(tex, nir_tex_src_texture_deref);
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assert(deref_src_idx >= 0);
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nir_deref_instr *deref = nir_src_as_deref(tex->src[deref_src_idx].src);
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nir_variable *var = nir_deref_instr_get_variable(deref);
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const struct radv_descriptor_set_layout *set_layout =
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layout->set[var->data.descriptor_set].layout;
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const struct radv_descriptor_set_binding_layout *binding =
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&set_layout->binding[var->data.binding];
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const struct radv_sampler_ycbcr_conversion_state *ycbcr_samplers =
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radv_immutable_ycbcr_samplers(set_layout, var->data.binding);
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if (!ycbcr_samplers)
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return false;
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assert(binding->immutable_samplers_offset);
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const uint32_t *immutable_samplers =
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radv_immutable_samplers(set_layout, binding);
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/* For the following instructions, we don't apply any change and let the
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* instruction apply to the first plane.
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*/
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if (tex->op == nir_texop_txs || tex->op == nir_texop_query_levels || tex->op == nir_texop_lod)
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return false;
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assert(tex->texture_index == 0);
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unsigned array_index = 0;
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if (deref->deref_type != nir_deref_type_var) {
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assert(deref->deref_type == nir_deref_type_array);
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if (!nir_src_is_const(deref->arr.index))
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return false;
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array_index = nir_src_as_uint(deref->arr.index);
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array_index = MIN2(array_index, binding->array_size - 1);
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}
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const struct radv_sampler_ycbcr_conversion_state *ycbcr_sampler = ycbcr_samplers + array_index;
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if (ycbcr_sampler->format == VK_FORMAT_UNDEFINED)
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return false;
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bool unnormalized_coordinates = immutable_samplers[4 * array_index + 0] & S_008F30_FORCE_UNNORMALIZED(1);
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struct ycbcr_state state = {
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.builder = builder,
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.origin_tex = tex,
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.tex_deref = deref,
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.conversion = ycbcr_sampler,
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.unnormalized_coordinates = unnormalized_coordinates,
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};
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builder->cursor = nir_before_instr(&tex->instr);
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VkFormat format = state.conversion->format;
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const int plane_count = vk_format_get_plane_count(format);
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nir_ssa_def *plane_values[3];
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for (int p = 0; p < plane_count; ++p) {
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plane_values[p] = create_plane_tex_instr_implicit(&state, p);
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}
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nir_ssa_def *result =
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build_swizzled_components(builder, format, ycbcr_sampler->components, plane_values);
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if (state.conversion->ycbcr_model != VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY) {
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VkFormat first_format = vk_format_get_plane_format(format, 0);
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uint32_t bits =
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vk_format_get_component_bits(first_format, UTIL_FORMAT_COLORSPACE_RGB, PIPE_SWIZZLE_X);
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/* TODO: swizzle and bpcs */
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uint32_t bpcs[3] = {bits, bits, bits};
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result = nir_convert_ycbcr_to_rgb(builder, state.conversion->ycbcr_model,
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state.conversion->ycbcr_range, result, bpcs);
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}
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nir_ssa_def_rewrite_uses(&tex->dest.ssa, result);
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nir_instr_remove(&tex->instr);
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return true;
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}
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static bool
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radv_nir_lower_ycbcr_textures_instr(nir_builder *b, nir_instr *instr, void *layout)
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{
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if (instr->type != nir_instr_type_tex)
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return false;
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nir_tex_instr *tex = nir_instr_as_tex(instr);
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return try_lower_tex_ycbcr(layout, b, tex);
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}
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bool
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radv_nir_lower_ycbcr_textures(nir_shader *shader, const struct radv_pipeline_layout *layout)
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{
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return nir_shader_instructions_pass(shader,
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radv_nir_lower_ycbcr_textures_instr,
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nir_metadata_block_index |
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nir_metadata_dominance,
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(void *)layout);
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}
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