2
* Copyright © 2017 Intel Corporation
4
* Permission is hereby granted, free of charge, to any person obtaining a
5
* copy of this software and associated documentation files (the "Software"),
6
* to deal in the Software without restriction, including without limitation
7
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
8
* and/or sell copies of the Software, and to permit persons to whom the
9
* Software is furnished to do so, subject to the following conditions:
11
* The above copyright notice and this permission notice (including the next
12
* paragraph) shall be included in all copies or substantial portions of the
15
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25
#include "anv_private.h"
27
#include "nir/nir_builder.h"
28
#include "nir/nir_vulkan.h"
32
nir_ssa_def *image_size;
33
nir_tex_instr *origin_tex;
34
nir_deref_instr *tex_deref;
35
struct anv_ycbcr_conversion *conversion;
38
/* TODO: we should probably replace this with a push constant/uniform. */
40
get_texture_size(struct ycbcr_state *state, nir_deref_instr *texture)
42
if (state->image_size)
43
return state->image_size;
45
nir_builder *b = state->builder;
46
const struct glsl_type *type = texture->type;
47
nir_tex_instr *tex = nir_tex_instr_create(b->shader, 1);
49
tex->op = nir_texop_txs;
50
tex->sampler_dim = glsl_get_sampler_dim(type);
51
tex->is_array = glsl_sampler_type_is_array(type);
52
tex->is_shadow = glsl_sampler_type_is_shadow(type);
53
tex->dest_type = nir_type_int32;
55
tex->src[0].src_type = nir_tex_src_texture_deref;
56
tex->src[0].src = nir_src_for_ssa(&texture->dest.ssa);
58
nir_ssa_dest_init(&tex->instr, &tex->dest,
59
nir_tex_instr_dest_size(tex), 32, NULL);
60
nir_builder_instr_insert(b, &tex->instr);
62
state->image_size = nir_i2f32(b, &tex->dest.ssa);
64
return state->image_size;
68
implicit_downsampled_coord(nir_builder *b,
70
nir_ssa_def *max_value,
76
nir_imm_float(b, 1.0f),
78
nir_imm_float(b, div_scale),
83
implicit_downsampled_coords(struct ycbcr_state *state,
84
nir_ssa_def *old_coords,
85
const struct anv_format_plane *plane_format)
87
nir_builder *b = state->builder;
88
struct anv_ycbcr_conversion *conversion = state->conversion;
89
nir_ssa_def *image_size = get_texture_size(state, state->tex_deref);
90
nir_ssa_def *comp[4] = { NULL, };
93
for (c = 0; c < ARRAY_SIZE(conversion->chroma_offsets); c++) {
94
if (plane_format->denominator_scales[c] > 1 &&
95
conversion->chroma_offsets[c] == VK_CHROMA_LOCATION_COSITED_EVEN) {
96
comp[c] = implicit_downsampled_coord(b,
97
nir_channel(b, old_coords, c),
98
nir_channel(b, image_size, c),
99
plane_format->denominator_scales[c]);
101
comp[c] = nir_channel(b, old_coords, c);
105
/* Leave other coordinates untouched */
106
for (; c < old_coords->num_components; c++)
107
comp[c] = nir_channel(b, old_coords, c);
109
return nir_vec(b, comp, old_coords->num_components);
113
create_plane_tex_instr_implicit(struct ycbcr_state *state,
116
nir_builder *b = state->builder;
117
struct anv_ycbcr_conversion *conversion = state->conversion;
118
const struct anv_format_plane *plane_format =
119
&conversion->format->planes[plane];
120
nir_tex_instr *old_tex = state->origin_tex;
121
nir_tex_instr *tex = nir_tex_instr_create(b->shader, old_tex->num_srcs + 1);
123
for (uint32_t i = 0; i < old_tex->num_srcs; i++) {
124
tex->src[i].src_type = old_tex->src[i].src_type;
126
switch (old_tex->src[i].src_type) {
127
case nir_tex_src_coord:
128
if (plane_format->has_chroma && conversion->chroma_reconstruction) {
129
assert(old_tex->src[i].src.is_ssa);
131
nir_src_for_ssa(implicit_downsampled_coords(state,
132
old_tex->src[i].src.ssa,
138
nir_src_copy(&tex->src[i].src, &old_tex->src[i].src);
142
tex->src[tex->num_srcs - 1].src = nir_src_for_ssa(nir_imm_int(b, plane));
143
tex->src[tex->num_srcs - 1].src_type = nir_tex_src_plane;
145
tex->sampler_dim = old_tex->sampler_dim;
146
tex->dest_type = old_tex->dest_type;
148
tex->op = old_tex->op;
149
tex->coord_components = old_tex->coord_components;
150
tex->is_new_style_shadow = old_tex->is_new_style_shadow;
151
tex->component = old_tex->component;
153
tex->texture_index = old_tex->texture_index;
154
tex->sampler_index = old_tex->sampler_index;
155
tex->is_array = old_tex->is_array;
157
nir_ssa_dest_init(&tex->instr, &tex->dest,
158
old_tex->dest.ssa.num_components,
159
nir_dest_bit_size(old_tex->dest), NULL);
160
nir_builder_instr_insert(b, &tex->instr);
162
return &tex->dest.ssa;
166
channel_to_component(enum isl_channel_select channel)
169
case ISL_CHANNEL_SELECT_RED:
171
case ISL_CHANNEL_SELECT_GREEN:
173
case ISL_CHANNEL_SELECT_BLUE:
175
case ISL_CHANNEL_SELECT_ALPHA:
178
unreachable("invalid channel");
183
static enum isl_channel_select
184
swizzle_channel(struct isl_swizzle swizzle, unsigned channel)
196
unreachable("invalid channel");
202
anv_nir_lower_ycbcr_textures_instr(nir_builder *builder,
206
const struct anv_pipeline_layout *layout = cb_data;
208
if (instr->type != nir_instr_type_tex)
211
nir_tex_instr *tex = nir_instr_as_tex(instr);
213
int deref_src_idx = nir_tex_instr_src_index(tex, nir_tex_src_texture_deref);
214
assert(deref_src_idx >= 0);
215
nir_deref_instr *deref = nir_src_as_deref(tex->src[deref_src_idx].src);
217
nir_variable *var = nir_deref_instr_get_variable(deref);
218
const struct anv_descriptor_set_layout *set_layout =
219
layout->set[var->data.descriptor_set].layout;
220
const struct anv_descriptor_set_binding_layout *binding =
221
&set_layout->binding[var->data.binding];
223
/* For the following instructions, we don't apply any change and let the
224
* instruction apply to the first plane.
226
if (tex->op == nir_texop_txs ||
227
tex->op == nir_texop_query_levels ||
228
tex->op == nir_texop_lod)
231
if (binding->immutable_samplers == NULL)
234
assert(tex->texture_index == 0);
235
unsigned array_index = 0;
236
if (deref->deref_type != nir_deref_type_var) {
237
assert(deref->deref_type == nir_deref_type_array);
238
if (!nir_src_is_const(deref->arr.index))
240
array_index = nir_src_as_uint(deref->arr.index);
241
array_index = MIN2(array_index, binding->array_size - 1);
243
const struct anv_sampler *sampler = binding->immutable_samplers[array_index];
245
if (sampler->conversion == NULL)
248
struct ycbcr_state state = {
252
.conversion = sampler->conversion,
255
builder->cursor = nir_before_instr(&tex->instr);
257
const struct anv_format *format = state.conversion->format;
258
const struct isl_format_layout *y_isl_layout = NULL;
259
for (uint32_t p = 0; p < format->n_planes; p++) {
260
if (!format->planes[p].has_chroma)
261
y_isl_layout = isl_format_get_layout(format->planes[p].isl_format);
263
assert(y_isl_layout != NULL);
264
uint8_t y_bpc = y_isl_layout->channels_array[0].bits;
266
/* |ycbcr_comp| holds components in the order : Cr-Y-Cb */
267
nir_ssa_def *zero = nir_imm_float(builder, 0.0f);
268
nir_ssa_def *one = nir_imm_float(builder, 1.0f);
269
/* Use extra 2 channels for following swizzle */
270
nir_ssa_def *ycbcr_comp[5] = { zero, zero, zero, one, zero };
272
uint8_t ycbcr_bpcs[5];
273
memset(ycbcr_bpcs, y_bpc, sizeof(ycbcr_bpcs));
275
/* Go through all the planes and gather the samples into a |ycbcr_comp|
276
* while applying a swizzle required by the spec:
278
* R, G, B should respectively map to Cr, Y, Cb
280
for (uint32_t p = 0; p < format->n_planes; p++) {
281
const struct anv_format_plane *plane_format = &format->planes[p];
282
nir_ssa_def *plane_sample = create_plane_tex_instr_implicit(&state, p);
284
for (uint32_t pc = 0; pc < 4; pc++) {
285
enum isl_channel_select ycbcr_swizzle =
286
swizzle_channel(plane_format->ycbcr_swizzle, pc);
287
if (ycbcr_swizzle == ISL_CHANNEL_SELECT_ZERO)
290
unsigned ycbcr_component = channel_to_component(ycbcr_swizzle);
291
ycbcr_comp[ycbcr_component] = nir_channel(builder, plane_sample, pc);
293
/* Also compute the number of bits for each component. */
294
const struct isl_format_layout *isl_layout =
295
isl_format_get_layout(plane_format->isl_format);
296
ycbcr_bpcs[ycbcr_component] = isl_layout->channels_array[pc].bits;
300
/* Now remaps components to the order specified by the conversion. */
301
nir_ssa_def *swizzled_comp[4] = { NULL, };
302
uint32_t swizzled_bpcs[4] = { 0, };
304
for (uint32_t i = 0; i < ARRAY_SIZE(state.conversion->mapping); i++) {
305
/* Maps to components in |ycbcr_comp| */
306
static const uint32_t swizzle_mapping[] = {
307
[VK_COMPONENT_SWIZZLE_ZERO] = 4,
308
[VK_COMPONENT_SWIZZLE_ONE] = 3,
309
[VK_COMPONENT_SWIZZLE_R] = 0,
310
[VK_COMPONENT_SWIZZLE_G] = 1,
311
[VK_COMPONENT_SWIZZLE_B] = 2,
312
[VK_COMPONENT_SWIZZLE_A] = 3,
314
const VkComponentSwizzle m = state.conversion->mapping[i];
316
if (m == VK_COMPONENT_SWIZZLE_IDENTITY) {
317
swizzled_comp[i] = ycbcr_comp[i];
318
swizzled_bpcs[i] = ycbcr_bpcs[i];
320
swizzled_comp[i] = ycbcr_comp[swizzle_mapping[m]];
321
swizzled_bpcs[i] = ycbcr_bpcs[swizzle_mapping[m]];
325
nir_ssa_def *result = nir_vec(builder, swizzled_comp, 4);
326
if (state.conversion->ycbcr_model != VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY) {
327
result = nir_convert_ycbcr_to_rgb(builder,
328
state.conversion->ycbcr_model,
329
state.conversion->ycbcr_range,
334
nir_ssa_def_rewrite_uses(&tex->dest.ssa, result);
335
nir_instr_remove(&tex->instr);
341
anv_nir_lower_ycbcr_textures(nir_shader *shader,
342
const struct anv_pipeline_layout *layout)
344
return nir_shader_instructions_pass(shader,
345
anv_nir_lower_ycbcr_textures_instr,
346
nir_metadata_block_index |
347
nir_metadata_dominance,