--- /dev/null
+/*
+ * Copyright © 2017 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 "anv_nir.h"
+#include "anv_private.h"
+#include "nir.h"
+#include "nir/nir_builder.h"
+
+struct ycbcr_state {
+ nir_builder *builder;
+ nir_ssa_def *image_size;
+ nir_tex_instr *origin_tex;
+ struct anv_ycbcr_conversion *conversion;
+};
+
+static nir_ssa_def *
+y_range(nir_builder *b,
+ nir_ssa_def *y_channel,
+ int bpc,
+ VkSamplerYcbcrRangeKHR range)
+{
+ switch (range) {
+ case VK_SAMPLER_YCBCR_RANGE_ITU_FULL_KHR:
+ return y_channel;
+ case VK_SAMPLER_YCBCR_RANGE_ITU_NARROW_KHR:
+ return nir_fmul(b,
+ nir_fadd(b,
+ nir_fmul(b, y_channel,
+ nir_imm_float(b, pow(2, bpc) - 1)),
+ nir_imm_float(b, -16.0f * pow(2, bpc - 8))),
+ nir_frcp(b, nir_imm_float(b, 219.0f * pow(2, bpc - 8))));
+ default:
+ unreachable("missing Ycbcr range");
+ return NULL;
+ }
+}
+
+static nir_ssa_def *
+chroma_range(nir_builder *b,
+ nir_ssa_def *chroma_channel,
+ int bpc,
+ VkSamplerYcbcrRangeKHR range)
+{
+ switch (range) {
+ case VK_SAMPLER_YCBCR_RANGE_ITU_FULL_KHR:
+ return nir_fadd(b, chroma_channel,
+ nir_imm_float(b, -pow(2, bpc - 1) / (pow(2, bpc) - 1.0f)));
+ case VK_SAMPLER_YCBCR_RANGE_ITU_NARROW_KHR:
+ return nir_fmul(b,
+ nir_fadd(b,
+ nir_fmul(b, chroma_channel,
+ nir_imm_float(b, pow(2, bpc) - 1)),
+ nir_imm_float(b, -128.0f * pow(2, bpc - 8))),
+ nir_frcp(b, nir_imm_float(b, 224.0f * pow(2, bpc - 8))));
+ default:
+ unreachable("missing Ycbcr range");
+ return NULL;
+ }
+}
+
+static const nir_const_value *
+ycbcr_model_to_rgb_matrix(VkSamplerYcbcrModelConversionKHR model)
+{
+ switch (model) {
+ case VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_601_KHR: {
+ static const nir_const_value bt601[3] = {
+ { .f32 = { 1.402f, 1.0f, 0.0f, 0.0f } },
+ { .f32 = { -0.714136286201022f, 1.0f, -0.344136286201022f, 0.0f } },
+ { .f32 = { 0.0f, 1.0f, 1.772f, 0.0f } }
+ };
+
+ return bt601;
+ }
+ case VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_709_KHR: {
+ static const nir_const_value bt709[3] = {
+ { .f32 = { 1.5748031496063f, 1.0f, 0.0, 0.0f } },
+ { .f32 = { -0.468125209181067f, 1.0f, -0.187327487470334f, 0.0f } },
+ { .f32 = { 0.0f, 1.0f, 1.85563184264242f, 0.0f } }
+ };
+
+ return bt709;
+ }
+ case VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_2020_KHR: {
+ static const nir_const_value bt2020[3] = {
+ { .f32 = { 1.4746f, 1.0f, 0.0f, 0.0f } },
+ { .f32 = { -0.571353126843658f, 1.0f, -0.164553126843658f, 0.0f } },
+ { .f32 = { 0.0f, 1.0f, 1.8814f, 0.0f } }
+ };
+
+ return bt2020;
+ }
+ default:
+ unreachable("missing Ycbcr model");
+ return NULL;
+ }
+}
+
+static nir_ssa_def *
+convert_ycbcr(struct ycbcr_state *state,
+ nir_ssa_def *raw_channels,
+ uint32_t *bpcs)
+{
+ nir_builder *b = state->builder;
+ struct anv_ycbcr_conversion *conversion = state->conversion;
+
+ nir_ssa_def *expanded_channels =
+ nir_vec4(b,
+ chroma_range(b, nir_channel(b, raw_channels, 0),
+ bpcs[0], conversion->ycbcr_range),
+ y_range(b, nir_channel(b, raw_channels, 1),
+ bpcs[1], conversion->ycbcr_range),
+ chroma_range(b, nir_channel(b, raw_channels, 2),
+ bpcs[2], conversion->ycbcr_range),
+ nir_imm_float(b, 1.0f));
+
+ if (conversion->ycbcr_model == VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_IDENTITY_KHR)
+ return expanded_channels;
+
+ const nir_const_value *conversion_matrix =
+ ycbcr_model_to_rgb_matrix(conversion->ycbcr_model);
+
+ nir_ssa_def *converted_channels[] = {
+ nir_fdot4(b, expanded_channels, nir_build_imm(b, 4, 32, conversion_matrix[0])),
+ nir_fdot4(b, expanded_channels, nir_build_imm(b, 4, 32, conversion_matrix[1])),
+ nir_fdot4(b, expanded_channels, nir_build_imm(b, 4, 32, conversion_matrix[2]))
+ };
+
+ return nir_vec4(b,
+ converted_channels[0], converted_channels[1],
+ converted_channels[2], nir_imm_float(b, 1.0f));
+}
+
+/* TODO: we should probably replace this with a push constant/uniform. */
+static nir_ssa_def *
+get_texture_size(struct ycbcr_state *state, nir_deref_var *texture)
+{
+ if (state->image_size)
+ return state->image_size;
+
+ nir_builder *b = state->builder;
+ const struct glsl_type *type = nir_deref_tail(&texture->deref)->type;
+ nir_tex_instr *tex = nir_tex_instr_create(b->shader, 0);
+
+ tex->op = nir_texop_txs;
+ tex->sampler_dim = glsl_get_sampler_dim(type);
+ tex->is_array = glsl_sampler_type_is_array(type);
+ tex->is_shadow = glsl_sampler_type_is_shadow(type);
+ tex->texture = nir_deref_var_clone(texture, tex);
+ tex->dest_type = nir_type_int;
+
+ nir_ssa_dest_init(&tex->instr, &tex->dest,
+ nir_tex_instr_dest_size(tex), 32, NULL);
+ nir_builder_instr_insert(b, &tex->instr);
+
+ state->image_size = nir_i2f32(b, &tex->dest.ssa);
+
+ return state->image_size;
+}
+
+static nir_ssa_def *
+implicit_downsampled_coord(nir_builder *b,
+ nir_ssa_def *value,
+ nir_ssa_def *max_value,
+ int div_scale)
+{
+ return nir_fadd(b,
+ value,
+ nir_fdiv(b,
+ nir_imm_float(b, 1.0f),
+ nir_fmul(b,
+ nir_imm_float(b, div_scale),
+ max_value)));
+}
+
+static nir_ssa_def *
+implicit_downsampled_coords(struct ycbcr_state *state,
+ nir_ssa_def *old_coords,
+ const struct anv_format_plane *plane_format)
+{
+ nir_builder *b = state->builder;
+ struct anv_ycbcr_conversion *conversion = state->conversion;
+ nir_ssa_def *image_size = get_texture_size(state,
+ state->origin_tex->texture);
+ nir_ssa_def *comp[4] = { NULL, };
+ int c;
+
+ for (c = 0; c < ARRAY_SIZE(conversion->chroma_offsets); c++) {
+ if (plane_format->denominator_scales[c] > 1 &&
+ conversion->chroma_offsets[c] == VK_CHROMA_LOCATION_COSITED_EVEN_KHR) {
+ comp[c] = implicit_downsampled_coord(b,
+ nir_channel(b, old_coords, c),
+ nir_channel(b, image_size, c),
+ plane_format->denominator_scales[c]);
+ } else {
+ comp[c] = nir_channel(b, old_coords, c);
+ }
+ }
+
+ /* Leave other coordinates untouched */
+ for (; c < old_coords->num_components; c++)
+ comp[c] = nir_channel(b, old_coords, c);
+
+ return nir_vec(b, comp, old_coords->num_components);
+}
+
+static nir_ssa_def *
+create_plane_tex_instr_implicit(struct ycbcr_state *state,
+ uint32_t plane)
+{
+ nir_builder *b = state->builder;
+ struct anv_ycbcr_conversion *conversion = state->conversion;
+ const struct anv_format_plane *plane_format =
+ &conversion->format->planes[plane];
+ nir_tex_instr *old_tex = state->origin_tex;
+ nir_tex_instr *tex = nir_tex_instr_create(b->shader, old_tex->num_srcs + 1);
+
+ for (uint32_t i = 0; i < old_tex->num_srcs; i++) {
+ tex->src[i].src_type = old_tex->src[i].src_type;
+
+ switch (old_tex->src[i].src_type) {
+ case nir_tex_src_coord:
+ if (plane_format->has_chroma && conversion->chroma_reconstruction) {
+ assert(old_tex->src[i].src.is_ssa);
+ tex->src[i].src =
+ nir_src_for_ssa(implicit_downsampled_coords(state,
+ old_tex->src[i].src.ssa,
+ plane_format));
+ break;
+ }
+ /* fall through */
+ default:
+ nir_src_copy(&tex->src[i].src, &old_tex->src[i].src, tex);
+ break;
+ }
+ }
+ tex->src[tex->num_srcs - 1].src = nir_src_for_ssa(nir_imm_int(b, plane));
+ tex->src[tex->num_srcs - 1].src_type = nir_tex_src_plane;
+
+ tex->sampler_dim = old_tex->sampler_dim;
+ tex->dest_type = old_tex->dest_type;
+
+ tex->op = old_tex->op;
+ tex->coord_components = old_tex->coord_components;
+ tex->is_new_style_shadow = old_tex->is_new_style_shadow;
+ tex->component = old_tex->component;
+
+ tex->texture_index = old_tex->texture_index;
+ tex->texture_array_size = old_tex->texture_array_size;
+ tex->texture = nir_deref_var_clone(old_tex->texture, tex);
+
+ tex->sampler_index = old_tex->sampler_index;
+ tex->sampler = nir_deref_var_clone(old_tex->sampler, tex);
+
+ nir_ssa_dest_init(&tex->instr, &tex->dest,
+ old_tex->dest.ssa.num_components,
+ nir_dest_bit_size(old_tex->dest), NULL);
+ nir_builder_instr_insert(b, &tex->instr);
+
+ return &tex->dest.ssa;
+}
+
+static unsigned
+channel_to_component(enum isl_channel_select channel)
+{
+ switch (channel) {
+ case ISL_CHANNEL_SELECT_RED:
+ return 0;
+ case ISL_CHANNEL_SELECT_GREEN:
+ return 1;
+ case ISL_CHANNEL_SELECT_BLUE:
+ return 2;
+ case ISL_CHANNEL_SELECT_ALPHA:
+ return 3;
+ default:
+ unreachable("invalid channel");
+ return 0;
+ }
+}
+
+static enum isl_channel_select
+swizzle_channel(struct isl_swizzle swizzle, unsigned channel)
+{
+ switch (channel) {
+ case 0:
+ return swizzle.r;
+ case 1:
+ return swizzle.g;
+ case 2:
+ return swizzle.b;
+ case 3:
+ return swizzle.a;
+ default:
+ unreachable("invalid channel");
+ return 0;
+ }
+}
+
+static bool
+try_lower_tex_ycbcr(struct anv_pipeline *pipeline,
+ nir_builder *builder,
+ nir_tex_instr *tex)
+{
+ nir_variable *var = tex->texture->var;
+ const struct anv_descriptor_set_layout *set_layout =
+ pipeline->layout->set[var->data.descriptor_set].layout;
+ const struct anv_descriptor_set_binding_layout *binding =
+ &set_layout->binding[var->data.binding];
+
+ /* For the following instructions, we don't apply any change and let the
+ * instruction apply to the first plane.
+ */
+ if (tex->op == nir_texop_txs ||
+ tex->op == nir_texop_query_levels ||
+ tex->op == nir_texop_lod)
+ return false;
+
+ if (binding->immutable_samplers == NULL)
+ return false;
+
+ unsigned texture_index = tex->texture_index;
+ if (tex->texture->deref.child) {
+ assert(tex->texture->deref.child->deref_type == nir_deref_type_array);
+ nir_deref_array *deref_array = nir_deref_as_array(tex->texture->deref.child);
+ if (deref_array->deref_array_type != nir_deref_array_type_direct)
+ return false;
+ size_t hw_binding_size =
+ anv_descriptor_set_binding_layout_get_hw_size(binding);
+ texture_index += MIN2(deref_array->base_offset, hw_binding_size - 1);
+ }
+ const struct anv_sampler *sampler =
+ binding->immutable_samplers[texture_index];
+
+ if (sampler->conversion == NULL)
+ return false;
+
+ struct ycbcr_state state = {
+ .builder = builder,
+ .origin_tex = tex,
+ .conversion = sampler->conversion,
+ };
+
+ builder->cursor = nir_before_instr(&tex->instr);
+
+ const struct anv_format *format = state.conversion->format;
+ const struct isl_format_layout *y_isl_layout = NULL;
+ for (uint32_t p = 0; p < format->n_planes; p++) {
+ if (!format->planes[p].has_chroma)
+ y_isl_layout = isl_format_get_layout(format->planes[p].isl_format);
+ }
+ assert(y_isl_layout != NULL);
+ uint8_t y_bpc = y_isl_layout->channels_array[0].bits;
+
+ /* |ycbcr_comp| holds components in the order : Cr-Y-Cb */
+ nir_ssa_def *ycbcr_comp[5] = { NULL, NULL, NULL,
+ /* Use extra 2 channels for following swizzle */
+ nir_imm_float(builder, 1.0f),
+ nir_imm_float(builder, 0.0f),
+ };
+ uint8_t ycbcr_bpcs[5];
+ memset(ycbcr_bpcs, y_bpc, sizeof(ycbcr_bpcs));
+
+ /* Go through all the planes and gather the samples into a |ycbcr_comp|
+ * while applying a swizzle required by the spec:
+ *
+ * R, G, B should respectively map to Cr, Y, Cb
+ */
+ for (uint32_t p = 0; p < format->n_planes; p++) {
+ const struct anv_format_plane *plane_format = &format->planes[p];
+ nir_ssa_def *plane_sample = create_plane_tex_instr_implicit(&state, p);
+
+ for (uint32_t pc = 0; pc < 4; pc++) {
+ enum isl_channel_select ycbcr_swizzle =
+ swizzle_channel(plane_format->ycbcr_swizzle, pc);
+ if (ycbcr_swizzle == ISL_CHANNEL_SELECT_ZERO)
+ continue;
+
+ unsigned ycbcr_component = channel_to_component(ycbcr_swizzle);
+ ycbcr_comp[ycbcr_component] = nir_channel(builder, plane_sample, pc);
+
+ /* Also compute the number of bits for each component. */
+ const struct isl_format_layout *isl_layout =
+ isl_format_get_layout(plane_format->isl_format);
+ ycbcr_bpcs[ycbcr_component] = isl_layout->channels_array[pc].bits;
+ }
+ }
+
+ /* Now remaps components to the order specified by the conversion. */
+ nir_ssa_def *swizzled_comp[4] = { NULL, };
+ uint32_t swizzled_bpcs[4] = { 0, };
+
+ for (uint32_t i = 0; i < ARRAY_SIZE(state.conversion->mapping); i++) {
+ /* Maps to components in |ycbcr_comp| */
+ static const uint32_t swizzle_mapping[] = {
+ [VK_COMPONENT_SWIZZLE_ZERO] = 4,
+ [VK_COMPONENT_SWIZZLE_ONE] = 3,
+ [VK_COMPONENT_SWIZZLE_R] = 0,
+ [VK_COMPONENT_SWIZZLE_G] = 1,
+ [VK_COMPONENT_SWIZZLE_B] = 2,
+ [VK_COMPONENT_SWIZZLE_A] = 3,
+ };
+ const VkComponentSwizzle m = state.conversion->mapping[i];
+
+ if (m == VK_COMPONENT_SWIZZLE_IDENTITY) {
+ swizzled_comp[i] = ycbcr_comp[i];
+ swizzled_bpcs[i] = ycbcr_bpcs[i];
+ } else {
+ swizzled_comp[i] = ycbcr_comp[swizzle_mapping[m]];
+ swizzled_bpcs[i] = ycbcr_bpcs[swizzle_mapping[m]];
+ }
+ }
+
+ nir_ssa_def *result = nir_vec(builder, swizzled_comp, 4);
+ if (state.conversion->ycbcr_model != VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY_KHR)
+ result = convert_ycbcr(&state, result, swizzled_bpcs);
+
+ nir_ssa_def_rewrite_uses(&tex->dest.ssa, nir_src_for_ssa(result));
+ nir_instr_remove(&tex->instr);
+
+ return true;
+}
+
+bool
+anv_nir_lower_ycbcr_textures(nir_shader *shader, struct anv_pipeline *pipeline)
+{
+ bool progress = false;
+
+ nir_foreach_function(function, shader) {
+ if (!function->impl)
+ continue;
+
+ bool function_progress = false;
+ nir_builder builder;
+ nir_builder_init(&builder, function->impl);
+
+ nir_foreach_block(block, function->impl) {
+ nir_foreach_instr_safe(instr, block) {
+ if (instr->type != nir_instr_type_tex)
+ continue;
+
+ nir_tex_instr *tex = nir_instr_as_tex(instr);
+ function_progress |= try_lower_tex_ycbcr(pipeline, &builder, tex);
+ }
+ }
+
+ if (function_progress) {
+ nir_metadata_preserve(function->impl,
+ nir_metadata_block_index |
+ nir_metadata_dominance);
+ }
+
+ progress |= function_progress;
+ }
+
+ return progress;
+}
projects / platform / upstream / mesa.git / commitdiff