1 /*
2 * Copyright © Microsoft Corporation
3 * Copyright © 2022 Valve Corporation
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include "nir_builder.h"
26 #include "nir_builtin_builder.h"
27
28
29 static const struct glsl_type *
make_2darray_sampler_from_cubemap(const struct glsl_type * type)30 make_2darray_sampler_from_cubemap(const struct glsl_type *type)
31 {
32 return glsl_get_sampler_dim(type) == GLSL_SAMPLER_DIM_CUBE ?
33 glsl_sampler_type(
34 GLSL_SAMPLER_DIM_2D,
35 false, true,
36 glsl_get_sampler_result_type(type)) : type;
37 }
38
39 static const struct glsl_type *
make_2darray_from_cubemap_with_array(const struct glsl_type * type)40 make_2darray_from_cubemap_with_array(const struct glsl_type *type)
41 {
42 if (glsl_type_is_array(type)) {
43 const struct glsl_type *new_type = glsl_without_array(type);
44 return new_type != type ? glsl_array_type(make_2darray_from_cubemap_with_array(glsl_without_array(type)),
45 glsl_get_length(type), 0) : type;
46 }
47 return make_2darray_sampler_from_cubemap(type);
48 }
49
50 static bool
lower_cubemap_to_array_filter(const nir_instr * instr,const void * mask)51 lower_cubemap_to_array_filter(const nir_instr *instr, const void *mask)
52 {
53 const uint32_t *nonseamless_cube_mask = mask;
54 if (instr->type == nir_instr_type_tex) {
55 nir_tex_instr *tex = nir_instr_as_tex(instr);
56
57 if (tex->sampler_dim != GLSL_SAMPLER_DIM_CUBE)
58 return false;
59
60 switch (tex->op) {
61 case nir_texop_tex:
62 case nir_texop_txb:
63 case nir_texop_txd:
64 case nir_texop_txl:
65 case nir_texop_txs:
66 case nir_texop_lod:
67 case nir_texop_tg4:
68 break;
69 default:
70 return false;
71 }
72 return (BITFIELD_BIT(tex->sampler_index) & (*nonseamless_cube_mask)) != 0;
73 }
74
75 return false;
76 }
77
78 typedef struct {
79 nir_ssa_def *rx;
80 nir_ssa_def *ry;
81 nir_ssa_def *rz;
82 nir_ssa_def *arx;
83 nir_ssa_def *ary;
84 nir_ssa_def *arz;
85 nir_ssa_def *array;
86 } coord_t;
87
88
89 /* This is taken from from sp_tex_sample:convert_cube */
90 static nir_ssa_def *
evaluate_face_x(nir_builder * b,coord_t * coord)91 evaluate_face_x(nir_builder *b, coord_t *coord)
92 {
93 nir_ssa_def *sign = nir_fsign(b, coord->rx);
94 nir_ssa_def *positive = nir_fge(b, coord->rx, nir_imm_float(b, 0.0));
95 nir_ssa_def *ima = nir_fdiv(b, nir_imm_float(b, -0.5), coord->arx);
96
97 nir_ssa_def *x = nir_fadd(b, nir_fmul(b, nir_fmul(b, sign, ima), coord->rz), nir_imm_float(b, 0.5));
98 nir_ssa_def *y = nir_fadd(b, nir_fmul(b, ima, coord->ry), nir_imm_float(b, 0.5));
99 nir_ssa_def *face = nir_bcsel(b, positive, nir_imm_float(b, 0.0), nir_imm_float(b, 1.0));
100
101 if (coord->array)
102 face = nir_fadd(b, face, coord->array);
103
104 return nir_vec3(b, x,y, face);
105 }
106
107 static nir_ssa_def *
evaluate_face_y(nir_builder * b,coord_t * coord)108 evaluate_face_y(nir_builder *b, coord_t *coord)
109 {
110 nir_ssa_def *sign = nir_fsign(b, coord->ry);
111 nir_ssa_def *positive = nir_fge(b, coord->ry, nir_imm_float(b, 0.0));
112 nir_ssa_def *ima = nir_fdiv(b, nir_imm_float(b, 0.5), coord->ary);
113
114 nir_ssa_def *x = nir_fadd(b, nir_fmul(b, ima, coord->rx), nir_imm_float(b, 0.5));
115 nir_ssa_def *y = nir_fadd(b, nir_fmul(b, nir_fmul(b, sign, ima), coord->rz), nir_imm_float(b, 0.5));
116 nir_ssa_def *face = nir_bcsel(b, positive, nir_imm_float(b, 2.0), nir_imm_float(b, 3.0));
117
118 if (coord->array)
119 face = nir_fadd(b, face, coord->array);
120
121 return nir_vec3(b, x,y, face);
122 }
123
124 static nir_ssa_def *
evaluate_face_z(nir_builder * b,coord_t * coord)125 evaluate_face_z(nir_builder *b, coord_t *coord)
126 {
127 nir_ssa_def *sign = nir_fsign(b, coord->rz);
128 nir_ssa_def *positive = nir_fge(b, coord->rz, nir_imm_float(b, 0.0));
129 nir_ssa_def *ima = nir_fdiv(b, nir_imm_float(b, -0.5), coord->arz);
130
131 nir_ssa_def *x = nir_fadd(b, nir_fmul(b, nir_fmul(b, sign, ima), nir_fneg(b, coord->rx)), nir_imm_float(b, 0.5));
132 nir_ssa_def *y = nir_fadd(b, nir_fmul(b, ima, coord->ry), nir_imm_float(b, 0.5));
133 nir_ssa_def *face = nir_bcsel(b, positive, nir_imm_float(b, 4.0), nir_imm_float(b, 5.0));
134
135 if (coord->array)
136 face = nir_fadd(b, face, coord->array);
137
138 return nir_vec3(b, x,y, face);
139 }
140
141 static nir_ssa_def *
create_array_tex_from_cube_tex(nir_builder * b,nir_tex_instr * tex,nir_ssa_def * coord,nir_texop op)142 create_array_tex_from_cube_tex(nir_builder *b, nir_tex_instr *tex, nir_ssa_def *coord, nir_texop op)
143 {
144 nir_tex_instr *array_tex;
145
146 unsigned num_srcs = tex->num_srcs;
147 if (op == nir_texop_txf && nir_tex_instr_src_index(tex, nir_tex_src_comparator) != -1)
148 num_srcs--;
149 array_tex = nir_tex_instr_create(b->shader, num_srcs);
150 array_tex->op = op;
151 array_tex->sampler_dim = GLSL_SAMPLER_DIM_2D;
152 array_tex->is_array = true;
153 array_tex->is_shadow = tex->is_shadow;
154 array_tex->is_sparse = tex->is_sparse;
155 array_tex->is_new_style_shadow = tex->is_new_style_shadow;
156 array_tex->texture_index = tex->texture_index;
157 array_tex->sampler_index = tex->sampler_index;
158 array_tex->dest_type = tex->dest_type;
159 array_tex->coord_components = 3;
160
161 nir_src coord_src = nir_src_for_ssa(coord);
162 unsigned s = 0;
163 for (unsigned i = 0; i < tex->num_srcs; i++) {
164 if (op == nir_texop_txf && tex->src[i].src_type == nir_tex_src_comparator)
165 continue;
166 nir_src *psrc = (tex->src[i].src_type == nir_tex_src_coord) ?
167 &coord_src : &tex->src[i].src;
168
169 array_tex->src[s].src_type = tex->src[i].src_type;
170 if (psrc->ssa->num_components != nir_tex_instr_src_size(array_tex, s)) {
171 nir_ssa_def *c = nir_channels(b, psrc->ssa, BITFIELD_MASK(nir_tex_instr_src_size(array_tex, s)));
172 array_tex->src[s].src = nir_src_for_ssa(c);
173 } else
174 nir_src_copy(&array_tex->src[s].src, psrc);
175 s++;
176 }
177
178 nir_ssa_dest_init(&array_tex->instr, &array_tex->dest,
179 nir_tex_instr_dest_size(array_tex), nir_dest_bit_size(tex->dest), NULL);
180 nir_builder_instr_insert(b, &array_tex->instr);
181 return &array_tex->dest.ssa;
182 }
183
184 static nir_ssa_def *
handle_cube_edge(nir_builder * b,nir_ssa_def * x,nir_ssa_def * y,nir_ssa_def * face,nir_ssa_def * array_slice_cube_base,nir_ssa_def * tex_size)185 handle_cube_edge(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *face, nir_ssa_def *array_slice_cube_base, nir_ssa_def *tex_size)
186 {
187 enum cube_remap
188 {
189 cube_remap_zero = 0,
190 cube_remap_x,
191 cube_remap_y,
192 cube_remap_tex_size,
193 cube_remap_tex_size_minus_x,
194 cube_remap_tex_size_minus_y,
195
196 cube_remap_size,
197 };
198
199 struct cube_remap_table
200 {
201 enum cube_remap remap_x;
202 enum cube_remap remap_y;
203 uint32_t remap_face;
204 };
205
206 static const struct cube_remap_table cube_remap_neg_x[6] =
207 {
208 {cube_remap_tex_size, cube_remap_y, 4},
209 {cube_remap_tex_size, cube_remap_y, 5},
210 {cube_remap_y, cube_remap_zero, 1},
211 {cube_remap_tex_size_minus_y, cube_remap_tex_size, 1},
212 {cube_remap_tex_size, cube_remap_y, 1},
213 {cube_remap_tex_size, cube_remap_y, 0},
214 };
215
216 static const struct cube_remap_table cube_remap_pos_x[6] =
217 {
218 {cube_remap_zero, cube_remap_y, 5},
219 {cube_remap_zero, cube_remap_y, 4},
220 {cube_remap_tex_size_minus_y, cube_remap_zero, 0},
221 {cube_remap_y, cube_remap_tex_size, 0},
222 {cube_remap_zero, cube_remap_y, 0},
223 {cube_remap_zero, cube_remap_y, 1},
224 };
225
226 static const struct cube_remap_table cube_remap_neg_y[6] =
227 {
228 {cube_remap_tex_size, cube_remap_tex_size_minus_x, 2},
229 {cube_remap_zero, cube_remap_x, 2},
230 {cube_remap_tex_size_minus_x, cube_remap_zero, 5},
231 {cube_remap_x, cube_remap_tex_size, 4},
232 {cube_remap_x, cube_remap_tex_size, 2},
233 {cube_remap_tex_size_minus_x, cube_remap_zero, 2},
234 };
235
236 static const struct cube_remap_table cube_remap_pos_y[6] =
237 {
238 {cube_remap_tex_size, cube_remap_x, 3},
239 {cube_remap_zero, cube_remap_tex_size_minus_x, 3},
240 {cube_remap_x, cube_remap_zero, 4},
241 {cube_remap_tex_size_minus_x, cube_remap_tex_size, 5},
242 {cube_remap_x, cube_remap_zero, 3},
243 {cube_remap_tex_size_minus_x, cube_remap_tex_size, 3},
244 };
245
246 static const struct cube_remap_table* remap_tables[4] = {
247 cube_remap_neg_x,
248 cube_remap_pos_x,
249 cube_remap_neg_y,
250 cube_remap_pos_y
251 };
252
253 nir_ssa_def *zero = nir_imm_int(b, 0);
254
255 /* Doesn't matter since the texture is square */
256 tex_size = nir_channel(b, tex_size, 0);
257
258 nir_ssa_def *x_on = nir_iand(b, nir_ige(b, x, zero), nir_ige(b, tex_size, x));
259 nir_ssa_def *y_on = nir_iand(b, nir_ige(b, y, zero), nir_ige(b, tex_size, y));
260 nir_ssa_def *one_on = nir_ixor(b, x_on, y_on);
261
262 /* If the sample did not fall off the face in either dimension, then set output = input */
263 nir_ssa_def *x_result = x;
264 nir_ssa_def *y_result = y;
265 nir_ssa_def *face_result = face;
266
267 /* otherwise, if the sample fell off the face in either the X or the Y direction, remap to the new face */
268 nir_ssa_def *remap_predicates[4] =
269 {
270 nir_iand(b, one_on, nir_ilt(b, x, zero)),
271 nir_iand(b, one_on, nir_ilt(b, tex_size, x)),
272 nir_iand(b, one_on, nir_ilt(b, y, zero)),
273 nir_iand(b, one_on, nir_ilt(b, tex_size, y)),
274 };
275
276 nir_ssa_def *remap_array[cube_remap_size];
277
278 remap_array[cube_remap_zero] = zero;
279 remap_array[cube_remap_x] = x;
280 remap_array[cube_remap_y] = y;
281 remap_array[cube_remap_tex_size] = tex_size;
282 remap_array[cube_remap_tex_size_minus_x] = nir_isub(b, tex_size, x);
283 remap_array[cube_remap_tex_size_minus_y] = nir_isub(b, tex_size, y);
284
285 /* For each possible way the sample could have fallen off */
286 for (unsigned i = 0; i < 4; i++) {
287 const struct cube_remap_table* remap_table = remap_tables[i];
288
289 /* For each possible original face */
290 for (unsigned j = 0; j < 6; j++) {
291 nir_ssa_def *predicate = nir_iand(b, remap_predicates[i], nir_ieq(b, face, nir_imm_int(b, j)));
292
293 x_result = nir_bcsel(b, predicate, remap_array[remap_table[j].remap_x], x_result);
294 y_result = nir_bcsel(b, predicate, remap_array[remap_table[j].remap_y], y_result);
295 face_result = nir_bcsel(b, predicate, remap_array[remap_table[j].remap_face], face_result);
296 }
297 }
298
299 return nir_vec3(b, x_result, y_result, nir_iadd(b, face_result, array_slice_cube_base));
300 }
301
302 static nir_ssa_def *
handle_cube_gather(nir_builder * b,nir_tex_instr * tex,nir_ssa_def * coord)303 handle_cube_gather(nir_builder *b, nir_tex_instr *tex, nir_ssa_def *coord)
304 {
305 tex->is_array = true;
306 nir_ssa_def *tex_size = nir_get_texture_size(b, tex);
307
308 /* nir_get_texture_size puts the cursor before the tex op */
309 b->cursor = nir_after_instr(coord->parent_instr);
310
311 nir_ssa_def *const_05 = nir_imm_float(b, 0.5f);
312 nir_ssa_def *texel_coords = nir_fmul(b, nir_channels(b, coord, 3),
313 nir_i2f32(b, nir_channels(b, tex_size, 3)));
314
315 nir_ssa_def *x_orig = nir_channel(b, texel_coords, 0);
316 nir_ssa_def *y_orig = nir_channel(b, texel_coords, 1);
317
318 nir_ssa_def *x_pos = nir_f2i32(b, nir_fadd(b, x_orig, const_05));
319 nir_ssa_def *x_neg = nir_f2i32(b, nir_fsub(b, x_orig, const_05));
320 nir_ssa_def *y_pos = nir_f2i32(b, nir_fadd(b, y_orig, const_05));
321 nir_ssa_def *y_neg = nir_f2i32(b, nir_fsub(b, y_orig, const_05));
322 nir_ssa_def *coords[4][2] = {
323 { x_neg, y_pos },
324 { x_pos, y_pos },
325 { x_pos, y_neg },
326 { x_neg, y_neg },
327 };
328
329 nir_ssa_def *array_slice_2d = nir_f2i32(b, nir_channel(b, coord, 2));
330 nir_ssa_def *face = nir_imod(b, array_slice_2d, nir_imm_int(b, 6));
331 nir_ssa_def *array_slice_cube_base = nir_isub(b, array_slice_2d, face);
332
333 nir_ssa_def *channels[4];
334 for (unsigned i = 0; i < 4; ++i) {
335 nir_ssa_def *final_coord = handle_cube_edge(b, coords[i][0], coords[i][1], face, array_slice_cube_base, tex_size);
336 nir_ssa_def *sampled_val = create_array_tex_from_cube_tex(b, tex, final_coord, nir_texop_txf);
337 channels[i] = nir_channel(b, sampled_val, tex->component);
338 }
339
340 return nir_vec(b, channels, 4);
341 }
342
343 static nir_ssa_def *
lower_cube_coords(nir_builder * b,nir_ssa_def * coord,bool is_array)344 lower_cube_coords(nir_builder *b, nir_ssa_def *coord, bool is_array)
345 {
346 coord_t coords;
347 coords.rx = nir_channel(b, coord, 0);
348 coords.ry = nir_channel(b, coord, 1);
349 coords.rz = nir_channel(b, coord, 2);
350 coords.arx = nir_fabs(b, coords.rx);
351 coords.ary = nir_fabs(b, coords.ry);
352 coords.arz = nir_fabs(b, coords.rz);
353 coords.array = NULL;
354 if (is_array)
355 coords.array = nir_fmul(b, nir_channel(b, coord, 3), nir_imm_float(b, 6.0f));
356
357 nir_ssa_def *use_face_x = nir_iand(b,
358 nir_fge(b, coords.arx, coords.ary),
359 nir_fge(b, coords.arx, coords.arz));
360
361 nir_if *use_face_x_if = nir_push_if(b, use_face_x);
362 nir_ssa_def *face_x_coord = evaluate_face_x(b, &coords);
363 nir_if *use_face_x_else = nir_push_else(b, use_face_x_if);
364
365 nir_ssa_def *use_face_y = nir_iand(b,
366 nir_fge(b, coords.ary, coords.arx),
367 nir_fge(b, coords.ary, coords.arz));
368
369 nir_if *use_face_y_if = nir_push_if(b, use_face_y);
370 nir_ssa_def *face_y_coord = evaluate_face_y(b, &coords);
371 nir_if *use_face_y_else = nir_push_else(b, use_face_y_if);
372
373 nir_ssa_def *face_z_coord = evaluate_face_z(b, &coords);
374
375 nir_pop_if(b, use_face_y_else);
376 nir_ssa_def *face_y_or_z_coord = nir_if_phi(b, face_y_coord, face_z_coord);
377 nir_pop_if(b, use_face_x_else);
378
379 // This contains in xy the normalized sample coordinates, and in z the face index
380 nir_ssa_def *coord_and_face = nir_if_phi(b, face_x_coord, face_y_or_z_coord);
381
382 return coord_and_face;
383 }
384
385 static void
rewrite_cube_var_type(nir_builder * b,nir_tex_instr * tex)386 rewrite_cube_var_type(nir_builder *b, nir_tex_instr *tex)
387 {
388 unsigned index = tex->texture_index;
389 nir_variable *sampler = NULL;
390 int highest = -1;
391 nir_foreach_variable_with_modes(var, b->shader, nir_var_uniform) {
392 if (!glsl_type_is_sampler(glsl_without_array(var->type)))
393 continue;
394 unsigned size = glsl_type_is_array(var->type) ? glsl_get_length(var->type) : 1;
395 if (var->data.driver_location == index ||
396 (var->data.driver_location < index && var->data.driver_location + size > index)) {
397 sampler = var;
398 break;
399 }
400 /* handle array sampler access: use the next-closest sampler */
401 if (var->data.driver_location > highest && var->data.driver_location < index) {
402 highest = var->data.driver_location;
403 sampler = var;
404 }
405 }
406 assert(sampler);
407 sampler->type = make_2darray_from_cubemap_with_array(sampler->type);
408 }
409
410 /* txb(s, coord, bias) = txl(s, coord, lod(s, coord).y + bias) */
411 /* tex(s, coord) = txl(s, coord, lod(s, coord).x) */
412 static nir_tex_instr *
lower_tex_to_txl(nir_builder * b,nir_tex_instr * tex)413 lower_tex_to_txl(nir_builder *b, nir_tex_instr *tex)
414 {
415 b->cursor = nir_after_instr(&tex->instr);
416 int bias_idx = nir_tex_instr_src_index(tex, nir_tex_src_bias);
417 unsigned num_srcs = bias_idx >= 0 ? tex->num_srcs : tex->num_srcs + 1;
418 nir_tex_instr *txl = nir_tex_instr_create(b->shader, num_srcs);
419
420 txl->op = nir_texop_txl;
421 txl->sampler_dim = tex->sampler_dim;
422 txl->dest_type = tex->dest_type;
423 txl->coord_components = tex->coord_components;
424 txl->texture_index = tex->texture_index;
425 txl->sampler_index = tex->sampler_index;
426 txl->is_array = tex->is_array;
427 txl->is_shadow = tex->is_shadow;
428 txl->is_sparse = tex->is_sparse;
429 txl->is_new_style_shadow = tex->is_new_style_shadow;
430
431 unsigned s = 0;
432 for (int i = 0; i < tex->num_srcs; i++) {
433 if (i == bias_idx)
434 continue;
435 nir_src_copy(&txl->src[s].src, &tex->src[i].src);
436 txl->src[s].src_type = tex->src[i].src_type;
437 s++;
438 }
439 nir_ssa_def *lod = nir_get_texture_lod(b, tex);
440
441 if (bias_idx >= 0)
442 lod = nir_fadd(b, lod, nir_ssa_for_src(b, tex->src[bias_idx].src, 1));
443 lod = nir_fadd_imm(b, lod, -1.0);
444 txl->src[s].src = nir_src_for_ssa(lod);
445 txl->src[s].src_type = nir_tex_src_lod;
446
447 b->cursor = nir_before_instr(&tex->instr);
448 nir_ssa_dest_init(&txl->instr, &txl->dest, nir_dest_num_components(tex->dest),
449 nir_dest_bit_size(tex->dest), NULL);
450 nir_builder_instr_insert(b, &txl->instr);
451 nir_ssa_def_rewrite_uses(&tex->dest.ssa, &txl->dest.ssa);
452 return txl;
453 }
454
455 static nir_ssa_def *
lower_cube_sample(nir_builder * b,nir_tex_instr * tex)456 lower_cube_sample(nir_builder *b, nir_tex_instr *tex)
457 {
458 if (!tex->is_shadow && (tex->op == nir_texop_txb || tex->op == nir_texop_tex)) {
459 tex = lower_tex_to_txl(b, tex);
460 }
461
462 int coord_index = nir_tex_instr_src_index(tex, nir_tex_src_coord);
463 assert(coord_index >= 0);
464
465 /* Evaluate the face and the xy coordinates for a 2D tex op */
466 nir_ssa_def *coord = tex->src[coord_index].src.ssa;
467 nir_ssa_def *coord_and_face = lower_cube_coords(b, coord, tex->is_array);
468
469 rewrite_cube_var_type(b, tex);
470
471 if (tex->op == nir_texop_tg4 && !tex->is_shadow)
472 return handle_cube_gather(b, tex, coord_and_face);
473 else
474 return create_array_tex_from_cube_tex(b, tex, coord_and_face, tex->op);
475 }
476
477 static nir_ssa_def *
lower_cube_txs(nir_builder * b,nir_tex_instr * tex)478 lower_cube_txs(nir_builder *b, nir_tex_instr *tex)
479 {
480 b->cursor = nir_after_instr(&tex->instr);
481
482 rewrite_cube_var_type(b, tex);
483 unsigned num_components = tex->dest.ssa.num_components;
484 /* force max components to unbreak textureSize().xy */
485 tex->dest.ssa.num_components = 3;
486 tex->is_array = true;
487 nir_ssa_def *array_dim = nir_channel(b, &tex->dest.ssa, 2);
488 nir_ssa_def *cube_array_dim = nir_idiv(b, array_dim, nir_imm_int(b, 6));
489 nir_ssa_def *size = nir_vec3(b, nir_channel(b, &tex->dest.ssa, 0),
490 nir_channel(b, &tex->dest.ssa, 1),
491 cube_array_dim);
492 return nir_channels(b, size, BITFIELD_MASK(num_components));
493 }
494
495 static nir_ssa_def *
lower_cubemap_to_array_tex(nir_builder * b,nir_tex_instr * tex)496 lower_cubemap_to_array_tex(nir_builder *b, nir_tex_instr *tex)
497 {
498 switch (tex->op) {
499 case nir_texop_tex:
500 case nir_texop_txb:
501 case nir_texop_txd:
502 case nir_texop_txl:
503 case nir_texop_lod:
504 case nir_texop_tg4:
505 return lower_cube_sample(b, tex);
506 case nir_texop_txs:
507 return lower_cube_txs(b, tex);
508 default:
509 unreachable("Unsupported cupe map texture operation");
510 }
511 }
512
513 static nir_ssa_def *
lower_cubemap_to_array_impl(nir_builder * b,nir_instr * instr,UNUSED void * _options)514 lower_cubemap_to_array_impl(nir_builder *b, nir_instr *instr,
515 UNUSED void *_options)
516 {
517 if (instr->type == nir_instr_type_tex)
518 return lower_cubemap_to_array_tex(b, nir_instr_as_tex(instr));
519 return NULL;
520 }
521
522 bool
523 zink_lower_cubemap_to_array(nir_shader *s, uint32_t nonseamless_cube_mask);
524 bool
zink_lower_cubemap_to_array(nir_shader * s,uint32_t nonseamless_cube_mask)525 zink_lower_cubemap_to_array(nir_shader *s, uint32_t nonseamless_cube_mask)
526 {
527 return nir_shader_lower_instructions(s,
528 lower_cubemap_to_array_filter,
529 lower_cubemap_to_array_impl,
530 &nonseamless_cube_mask);
531 }
532