/* * 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/nir.h" #include "nir/nir_builder.h" struct ycbcr_state { nir_builder *builder; nir_ssa_def *image_size; nir_tex_instr *origin_tex; nir_deref_instr *tex_deref; 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: return y_channel; case VK_SAMPLER_YCBCR_RANGE_ITU_NARROW: 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: 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: 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: { 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: { 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: { 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) 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_instr *texture) { if (state->image_size) return state->image_size; nir_builder *b = state->builder; const struct glsl_type *type = texture->type; nir_tex_instr *tex = nir_tex_instr_create(b->shader, 1); 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->dest_type = nir_type_int; tex->src[0].src_type = nir_tex_src_texture_deref; tex->src[0].src = nir_src_for_ssa(&texture->dest.ssa); 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->tex_deref); 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) { 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->sampler_index = old_tex->sampler_index; 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_layout *layout, nir_builder *builder, nir_tex_instr *tex) { int deref_src_idx = nir_tex_instr_src_index(tex, nir_tex_src_texture_deref); assert(deref_src_idx >= 0); nir_deref_instr *deref = nir_src_as_deref(tex->src[deref_src_idx].src); nir_variable *var = nir_deref_instr_get_variable(deref); const struct anv_descriptor_set_layout *set_layout = 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; assert(tex->texture_index == 0); unsigned array_index = 0; if (deref->deref_type != nir_deref_type_var) { assert(deref->deref_type == nir_deref_type_array); if (!nir_src_is_const(deref->arr.index)) return false; array_index = nir_src_as_uint(deref->arr.index); array_index = MIN2(array_index, binding->array_size - 1); } const struct anv_sampler *sampler = binding->immutable_samplers[array_index]; if (sampler->conversion == NULL) return false; struct ycbcr_state state = { .builder = builder, .origin_tex = tex, .tex_deref = deref, .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 *zero = nir_imm_float(builder, 0.0f); nir_ssa_def *one = nir_imm_float(builder, 1.0f); /* Use extra 2 channels for following swizzle */ nir_ssa_def *ycbcr_comp[5] = { zero, zero, zero, one, zero }; 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) 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_layout *layout) { 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(layout, &builder, tex); } } if (function_progress) { nir_metadata_preserve(function->impl, nir_metadata_block_index | nir_metadata_dominance); } progress |= function_progress; } return progress; }