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[mesa.git] / src / gallium / auxiliary / gallivm / lp_bld_sample_soa.c
1 /**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 /**
29 * @file
30 * Texture sampling -- SoA.
31 *
32 * @author Jose Fonseca <jfonseca@vmware.com>
33 * @author Brian Paul <brianp@vmware.com>
34 */
35
36 #include "pipe/p_defines.h"
37 #include "pipe/p_state.h"
38 #include "pipe/p_shader_tokens.h"
39 #include "util/u_debug.h"
40 #include "util/u_dump.h"
41 #include "util/u_memory.h"
42 #include "util/u_math.h"
43 #include "util/u_format.h"
44 #include "util/u_cpu_detect.h"
45 #include "lp_bld_debug.h"
46 #include "lp_bld_type.h"
47 #include "lp_bld_const.h"
48 #include "lp_bld_conv.h"
49 #include "lp_bld_arit.h"
50 #include "lp_bld_bitarit.h"
51 #include "lp_bld_logic.h"
52 #include "lp_bld_printf.h"
53 #include "lp_bld_swizzle.h"
54 #include "lp_bld_flow.h"
55 #include "lp_bld_gather.h"
56 #include "lp_bld_format.h"
57 #include "lp_bld_sample.h"
58 #include "lp_bld_sample_aos.h"
59 #include "lp_bld_struct.h"
60 #include "lp_bld_quad.h"
61 #include "lp_bld_pack.h"
62
63
64 /**
65 * Generate code to fetch a texel from a texture at int coords (x, y, z).
66 * The computation depends on whether the texture is 1D, 2D or 3D.
67 * The result, texel, will be float vectors:
68 * texel[0] = red values
69 * texel[1] = green values
70 * texel[2] = blue values
71 * texel[3] = alpha values
72 */
73 static void
74 lp_build_sample_texel_soa(struct lp_build_sample_context *bld,
75 unsigned sampler_unit,
76 LLVMValueRef width,
77 LLVMValueRef height,
78 LLVMValueRef depth,
79 LLVMValueRef x,
80 LLVMValueRef y,
81 LLVMValueRef z,
82 LLVMValueRef y_stride,
83 LLVMValueRef z_stride,
84 LLVMValueRef data_ptr,
85 LLVMValueRef mipoffsets,
86 LLVMValueRef texel_out[4])
87 {
88 const struct lp_static_sampler_state *static_state = bld->static_sampler_state;
89 const unsigned dims = bld->dims;
90 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
91 LLVMBuilderRef builder = bld->gallivm->builder;
92 LLVMValueRef offset;
93 LLVMValueRef i, j;
94 LLVMValueRef use_border = NULL;
95
96 /* use_border = x < 0 || x >= width || y < 0 || y >= height */
97 if (lp_sampler_wrap_mode_uses_border_color(static_state->wrap_s,
98 static_state->min_img_filter,
99 static_state->mag_img_filter)) {
100 LLVMValueRef b1, b2;
101 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, x, int_coord_bld->zero);
102 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, x, width);
103 use_border = LLVMBuildOr(builder, b1, b2, "b1_or_b2");
104 }
105
106 if (dims >= 2 &&
107 lp_sampler_wrap_mode_uses_border_color(static_state->wrap_t,
108 static_state->min_img_filter,
109 static_state->mag_img_filter)) {
110 LLVMValueRef b1, b2;
111 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, y, int_coord_bld->zero);
112 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, y, height);
113 if (use_border) {
114 use_border = LLVMBuildOr(builder, use_border, b1, "ub_or_b1");
115 use_border = LLVMBuildOr(builder, use_border, b2, "ub_or_b2");
116 }
117 else {
118 use_border = LLVMBuildOr(builder, b1, b2, "b1_or_b2");
119 }
120 }
121
122 if (dims == 3 &&
123 lp_sampler_wrap_mode_uses_border_color(static_state->wrap_r,
124 static_state->min_img_filter,
125 static_state->mag_img_filter)) {
126 LLVMValueRef b1, b2;
127 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, z, int_coord_bld->zero);
128 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, z, depth);
129 if (use_border) {
130 use_border = LLVMBuildOr(builder, use_border, b1, "ub_or_b1");
131 use_border = LLVMBuildOr(builder, use_border, b2, "ub_or_b2");
132 }
133 else {
134 use_border = LLVMBuildOr(builder, b1, b2, "b1_or_b2");
135 }
136 }
137
138 /* convert x,y,z coords to linear offset from start of texture, in bytes */
139 lp_build_sample_offset(&bld->int_coord_bld,
140 bld->format_desc,
141 x, y, z, y_stride, z_stride,
142 &offset, &i, &j);
143 if (mipoffsets) {
144 offset = lp_build_add(&bld->int_coord_bld, offset, mipoffsets);
145 }
146
147 if (use_border) {
148 /* If we can sample the border color, it means that texcoords may
149 * lie outside the bounds of the texture image. We need to do
150 * something to prevent reading out of bounds and causing a segfault.
151 *
152 * Simply AND the texture coords with !use_border. This will cause
153 * coords which are out of bounds to become zero. Zero's guaranteed
154 * to be inside the texture image.
155 */
156 offset = lp_build_andnot(&bld->int_coord_bld, offset, use_border);
157 }
158
159 lp_build_fetch_rgba_soa(bld->gallivm,
160 bld->format_desc,
161 bld->texel_type,
162 data_ptr, offset,
163 i, j,
164 texel_out);
165
166 /*
167 * Note: if we find an app which frequently samples the texture border
168 * we might want to implement a true conditional here to avoid sampling
169 * the texture whenever possible (since that's quite a bit of code).
170 * Ex:
171 * if (use_border) {
172 * texel = border_color;
173 * }
174 * else {
175 * texel = sample_texture(coord);
176 * }
177 * As it is now, we always sample the texture, then selectively replace
178 * the texel color results with the border color.
179 */
180
181 if (use_border) {
182 /* select texel color or border color depending on use_border */
183 LLVMValueRef border_color_ptr =
184 bld->dynamic_state->border_color(bld->dynamic_state,
185 bld->gallivm, sampler_unit);
186 int chan;
187 for (chan = 0; chan < 4; chan++) {
188 LLVMValueRef border_chan =
189 lp_build_array_get(bld->gallivm, border_color_ptr,
190 lp_build_const_int32(bld->gallivm, chan));
191 LLVMValueRef border_chan_vec =
192 lp_build_broadcast_scalar(&bld->float_vec_bld, border_chan);
193
194 if (!bld->texel_type.floating) {
195 border_chan_vec = LLVMBuildBitCast(builder, border_chan_vec,
196 bld->texel_bld.vec_type, "");
197 }
198 texel_out[chan] = lp_build_select(&bld->texel_bld, use_border,
199 border_chan_vec, texel_out[chan]);
200 }
201 }
202 }
203
204
205 /**
206 * Helper to compute the mirror function for the PIPE_WRAP_MIRROR modes.
207 */
208 static LLVMValueRef
209 lp_build_coord_mirror(struct lp_build_sample_context *bld,
210 LLVMValueRef coord)
211 {
212 struct lp_build_context *coord_bld = &bld->coord_bld;
213 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
214 LLVMValueRef fract, flr, isOdd;
215
216 lp_build_ifloor_fract(coord_bld, coord, &flr, &fract);
217
218 /* isOdd = flr & 1 */
219 isOdd = LLVMBuildAnd(bld->gallivm->builder, flr, int_coord_bld->one, "");
220
221 /* make coord positive or negative depending on isOdd */
222 coord = lp_build_set_sign(coord_bld, fract, isOdd);
223
224 /* convert isOdd to float */
225 isOdd = lp_build_int_to_float(coord_bld, isOdd);
226
227 /* add isOdd to coord */
228 coord = lp_build_add(coord_bld, coord, isOdd);
229
230 return coord;
231 }
232
233
234 /**
235 * Helper to compute the first coord and the weight for
236 * linear wrap repeat npot textures
237 */
238 void
239 lp_build_coord_repeat_npot_linear(struct lp_build_sample_context *bld,
240 LLVMValueRef coord_f,
241 LLVMValueRef length_i,
242 LLVMValueRef length_f,
243 LLVMValueRef *coord0_i,
244 LLVMValueRef *weight_f)
245 {
246 struct lp_build_context *coord_bld = &bld->coord_bld;
247 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
248 LLVMValueRef half = lp_build_const_vec(bld->gallivm, coord_bld->type, 0.5);
249 LLVMValueRef length_minus_one = lp_build_sub(int_coord_bld, length_i,
250 int_coord_bld->one);
251 LLVMValueRef mask;
252 /* wrap with normalized floats is just fract */
253 coord_f = lp_build_fract(coord_bld, coord_f);
254 /* mul by size and subtract 0.5 */
255 coord_f = lp_build_mul(coord_bld, coord_f, length_f);
256 coord_f = lp_build_sub(coord_bld, coord_f, half);
257 /*
258 * we avoided the 0.5/length division before the repeat wrap,
259 * now need to fix up edge cases with selects
260 */
261 /* convert to int, compute lerp weight */
262 lp_build_ifloor_fract(coord_bld, coord_f, coord0_i, weight_f);
263 mask = lp_build_compare(int_coord_bld->gallivm, int_coord_bld->type,
264 PIPE_FUNC_LESS, *coord0_i, int_coord_bld->zero);
265 *coord0_i = lp_build_select(int_coord_bld, mask, length_minus_one, *coord0_i);
266 }
267
268
269 /**
270 * Build LLVM code for texture wrap mode for linear filtering.
271 * \param x0_out returns first integer texcoord
272 * \param x1_out returns second integer texcoord
273 * \param weight_out returns linear interpolation weight
274 */
275 static void
276 lp_build_sample_wrap_linear(struct lp_build_sample_context *bld,
277 LLVMValueRef coord,
278 LLVMValueRef length,
279 LLVMValueRef length_f,
280 boolean is_pot,
281 unsigned wrap_mode,
282 LLVMValueRef *x0_out,
283 LLVMValueRef *x1_out,
284 LLVMValueRef *weight_out)
285 {
286 struct lp_build_context *coord_bld = &bld->coord_bld;
287 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
288 LLVMBuilderRef builder = bld->gallivm->builder;
289 LLVMValueRef half = lp_build_const_vec(bld->gallivm, coord_bld->type, 0.5);
290 LLVMValueRef length_minus_one = lp_build_sub(int_coord_bld, length, int_coord_bld->one);
291 LLVMValueRef coord0, coord1, weight;
292
293 switch(wrap_mode) {
294 case PIPE_TEX_WRAP_REPEAT:
295 if (is_pot) {
296 /* mul by size and subtract 0.5 */
297 coord = lp_build_mul(coord_bld, coord, length_f);
298 coord = lp_build_sub(coord_bld, coord, half);
299 /* convert to int, compute lerp weight */
300 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
301 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
302 /* repeat wrap */
303 coord0 = LLVMBuildAnd(builder, coord0, length_minus_one, "");
304 coord1 = LLVMBuildAnd(builder, coord1, length_minus_one, "");
305 }
306 else {
307 LLVMValueRef mask;
308 lp_build_coord_repeat_npot_linear(bld, coord,
309 length, length_f,
310 &coord0, &weight);
311 mask = lp_build_compare(int_coord_bld->gallivm, int_coord_bld->type,
312 PIPE_FUNC_NOTEQUAL, coord0, length_minus_one);
313 coord1 = LLVMBuildAnd(builder,
314 lp_build_add(int_coord_bld, coord0, int_coord_bld->one),
315 mask, "");
316 }
317 break;
318
319 case PIPE_TEX_WRAP_CLAMP:
320 if (bld->static_sampler_state->normalized_coords) {
321 /* scale coord to length */
322 coord = lp_build_mul(coord_bld, coord, length_f);
323 }
324
325 /* clamp to [0, length] */
326 coord = lp_build_clamp(coord_bld, coord, coord_bld->zero, length_f);
327
328 coord = lp_build_sub(coord_bld, coord, half);
329
330 /* convert to int, compute lerp weight */
331 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
332 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
333 break;
334
335 case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
336 {
337 struct lp_build_context abs_coord_bld = bld->coord_bld;
338 abs_coord_bld.type.sign = FALSE;
339
340 if (bld->static_sampler_state->normalized_coords) {
341 /* mul by tex size */
342 coord = lp_build_mul(coord_bld, coord, length_f);
343 }
344 /* clamp to length max */
345 coord = lp_build_min(coord_bld, coord, length_f);
346 /* subtract 0.5 */
347 coord = lp_build_sub(coord_bld, coord, half);
348 /* clamp to [0, length - 0.5] */
349 coord = lp_build_max(coord_bld, coord, coord_bld->zero);
350 /* convert to int, compute lerp weight */
351 lp_build_ifloor_fract(&abs_coord_bld, coord, &coord0, &weight);
352 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
353 /* coord1 = min(coord1, length-1) */
354 coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one);
355 break;
356 }
357
358 case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
359 if (bld->static_sampler_state->normalized_coords) {
360 /* scale coord to length */
361 coord = lp_build_mul(coord_bld, coord, length_f);
362 }
363 /* was: clamp to [-0.5, length + 0.5], then sub 0.5 */
364 /* can skip clamp (though might not work for very large coord values */
365 coord = lp_build_sub(coord_bld, coord, half);
366 /* convert to int, compute lerp weight */
367 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
368 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
369 break;
370
371 case PIPE_TEX_WRAP_MIRROR_REPEAT:
372 /* compute mirror function */
373 coord = lp_build_coord_mirror(bld, coord);
374
375 /* scale coord to length */
376 coord = lp_build_mul(coord_bld, coord, length_f);
377 coord = lp_build_sub(coord_bld, coord, half);
378
379 /* convert to int, compute lerp weight */
380 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
381 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
382
383 /* coord0 = max(coord0, 0) */
384 coord0 = lp_build_max(int_coord_bld, coord0, int_coord_bld->zero);
385 /* coord1 = min(coord1, length-1) */
386 coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one);
387 break;
388
389 case PIPE_TEX_WRAP_MIRROR_CLAMP:
390 coord = lp_build_abs(coord_bld, coord);
391
392 if (bld->static_sampler_state->normalized_coords) {
393 /* scale coord to length */
394 coord = lp_build_mul(coord_bld, coord, length_f);
395 }
396
397 /* clamp to [0, length] */
398 coord = lp_build_min(coord_bld, coord, length_f);
399
400 coord = lp_build_sub(coord_bld, coord, half);
401
402 /* convert to int, compute lerp weight */
403 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
404 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
405 break;
406
407 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
408 {
409 LLVMValueRef min, max;
410 struct lp_build_context abs_coord_bld = bld->coord_bld;
411 abs_coord_bld.type.sign = FALSE;
412 coord = lp_build_abs(coord_bld, coord);
413
414 if (bld->static_sampler_state->normalized_coords) {
415 /* scale coord to length */
416 coord = lp_build_mul(coord_bld, coord, length_f);
417 }
418
419 /* clamp to [0.5, length - 0.5] */
420 min = half;
421 max = lp_build_sub(coord_bld, length_f, min);
422 coord = lp_build_clamp(coord_bld, coord, min, max);
423
424 coord = lp_build_sub(coord_bld, coord, half);
425
426 /* convert to int, compute lerp weight */
427 lp_build_ifloor_fract(&abs_coord_bld, coord, &coord0, &weight);
428 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
429 }
430 break;
431
432 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
433 {
434 coord = lp_build_abs(coord_bld, coord);
435
436 if (bld->static_sampler_state->normalized_coords) {
437 /* scale coord to length */
438 coord = lp_build_mul(coord_bld, coord, length_f);
439 }
440
441 /* was: clamp to [-0.5, length + 0.5] then sub 0.5 */
442 /* skip clamp - always positive, and other side
443 only potentially matters for very large coords */
444 coord = lp_build_sub(coord_bld, coord, half);
445
446 /* convert to int, compute lerp weight */
447 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
448 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
449 }
450 break;
451
452 default:
453 assert(0);
454 coord0 = NULL;
455 coord1 = NULL;
456 weight = NULL;
457 }
458
459 *x0_out = coord0;
460 *x1_out = coord1;
461 *weight_out = weight;
462 }
463
464
465 /**
466 * Build LLVM code for texture wrap mode for nearest filtering.
467 * \param coord the incoming texcoord (nominally in [0,1])
468 * \param length the texture size along one dimension, as int vector
469 * \param is_pot if TRUE, length is a power of two
470 * \param wrap_mode one of PIPE_TEX_WRAP_x
471 */
472 static LLVMValueRef
473 lp_build_sample_wrap_nearest(struct lp_build_sample_context *bld,
474 LLVMValueRef coord,
475 LLVMValueRef length,
476 LLVMValueRef length_f,
477 boolean is_pot,
478 unsigned wrap_mode)
479 {
480 struct lp_build_context *coord_bld = &bld->coord_bld;
481 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
482 LLVMBuilderRef builder = bld->gallivm->builder;
483 LLVMValueRef length_minus_one = lp_build_sub(int_coord_bld, length, int_coord_bld->one);
484 LLVMValueRef icoord;
485
486 switch(wrap_mode) {
487 case PIPE_TEX_WRAP_REPEAT:
488 if (is_pot) {
489 coord = lp_build_mul(coord_bld, coord, length_f);
490 icoord = lp_build_ifloor(coord_bld, coord);
491 icoord = LLVMBuildAnd(builder, icoord, length_minus_one, "");
492 }
493 else {
494 /* take fraction, unnormalize */
495 coord = lp_build_fract_safe(coord_bld, coord);
496 coord = lp_build_mul(coord_bld, coord, length_f);
497 icoord = lp_build_itrunc(coord_bld, coord);
498 }
499 break;
500
501 case PIPE_TEX_WRAP_CLAMP:
502 case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
503 if (bld->static_sampler_state->normalized_coords) {
504 /* scale coord to length */
505 coord = lp_build_mul(coord_bld, coord, length_f);
506 }
507
508 /* floor */
509 /* use itrunc instead since we clamp to 0 anyway */
510 icoord = lp_build_itrunc(coord_bld, coord);
511
512 /* clamp to [0, length - 1]. */
513 icoord = lp_build_clamp(int_coord_bld, icoord, int_coord_bld->zero,
514 length_minus_one);
515 break;
516
517 case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
518 if (bld->static_sampler_state->normalized_coords) {
519 /* scale coord to length */
520 coord = lp_build_mul(coord_bld, coord, length_f);
521 }
522 /* no clamp necessary, border masking will handle this */
523 icoord = lp_build_ifloor(coord_bld, coord);
524 break;
525
526 case PIPE_TEX_WRAP_MIRROR_REPEAT:
527 /* compute mirror function */
528 coord = lp_build_coord_mirror(bld, coord);
529
530 /* scale coord to length */
531 assert(bld->static_sampler_state->normalized_coords);
532 coord = lp_build_mul(coord_bld, coord, length_f);
533
534 /* itrunc == ifloor here */
535 icoord = lp_build_itrunc(coord_bld, coord);
536
537 /* clamp to [0, length - 1] */
538 icoord = lp_build_min(int_coord_bld, icoord, length_minus_one);
539 break;
540
541 case PIPE_TEX_WRAP_MIRROR_CLAMP:
542 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
543 coord = lp_build_abs(coord_bld, coord);
544
545 if (bld->static_sampler_state->normalized_coords) {
546 /* scale coord to length */
547 coord = lp_build_mul(coord_bld, coord, length_f);
548 }
549
550 /* itrunc == ifloor here */
551 icoord = lp_build_itrunc(coord_bld, coord);
552
553 /* clamp to [0, length - 1] */
554 icoord = lp_build_min(int_coord_bld, icoord, length_minus_one);
555 break;
556
557 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
558 coord = lp_build_abs(coord_bld, coord);
559
560 if (bld->static_sampler_state->normalized_coords) {
561 /* scale coord to length */
562 coord = lp_build_mul(coord_bld, coord, length_f);
563 }
564
565 /* itrunc == ifloor here */
566 icoord = lp_build_itrunc(coord_bld, coord);
567 break;
568
569 default:
570 assert(0);
571 icoord = NULL;
572 }
573
574 return icoord;
575 }
576
577
578 /**
579 * Generate code to sample a mipmap level with nearest filtering.
580 * If sampling a cube texture, r = cube face in [0,5].
581 */
582 static void
583 lp_build_sample_image_nearest(struct lp_build_sample_context *bld,
584 unsigned sampler_unit,
585 LLVMValueRef size,
586 LLVMValueRef row_stride_vec,
587 LLVMValueRef img_stride_vec,
588 LLVMValueRef data_ptr,
589 LLVMValueRef mipoffsets,
590 LLVMValueRef s,
591 LLVMValueRef t,
592 LLVMValueRef r,
593 LLVMValueRef colors_out[4])
594 {
595 const unsigned dims = bld->dims;
596 LLVMValueRef width_vec;
597 LLVMValueRef height_vec;
598 LLVMValueRef depth_vec;
599 LLVMValueRef flt_size;
600 LLVMValueRef flt_width_vec;
601 LLVMValueRef flt_height_vec;
602 LLVMValueRef flt_depth_vec;
603 LLVMValueRef x, y = NULL, z = NULL;
604
605 lp_build_extract_image_sizes(bld,
606 &bld->int_size_bld,
607 bld->int_coord_type,
608 size,
609 &width_vec, &height_vec, &depth_vec);
610
611 flt_size = lp_build_int_to_float(&bld->float_size_bld, size);
612
613 lp_build_extract_image_sizes(bld,
614 &bld->float_size_bld,
615 bld->coord_type,
616 flt_size,
617 &flt_width_vec, &flt_height_vec, &flt_depth_vec);
618
619 /*
620 * Compute integer texcoords.
621 */
622 x = lp_build_sample_wrap_nearest(bld, s, width_vec, flt_width_vec,
623 bld->static_texture_state->pot_width,
624 bld->static_sampler_state->wrap_s);
625 lp_build_name(x, "tex.x.wrapped");
626
627 if (dims >= 2) {
628 y = lp_build_sample_wrap_nearest(bld, t, height_vec, flt_height_vec,
629 bld->static_texture_state->pot_height,
630 bld->static_sampler_state->wrap_t);
631 lp_build_name(y, "tex.y.wrapped");
632
633 if (dims == 3) {
634 z = lp_build_sample_wrap_nearest(bld, r, depth_vec, flt_depth_vec,
635 bld->static_texture_state->pot_depth,
636 bld->static_sampler_state->wrap_r);
637 lp_build_name(z, "tex.z.wrapped");
638 }
639 }
640 if (bld->static_texture_state->target == PIPE_TEXTURE_CUBE ||
641 bld->static_texture_state->target == PIPE_TEXTURE_1D_ARRAY ||
642 bld->static_texture_state->target == PIPE_TEXTURE_2D_ARRAY) {
643 z = r;
644 lp_build_name(z, "tex.z.layer");
645 }
646
647 /*
648 * Get texture colors.
649 */
650 lp_build_sample_texel_soa(bld, sampler_unit,
651 width_vec, height_vec, depth_vec,
652 x, y, z,
653 row_stride_vec, img_stride_vec,
654 data_ptr, mipoffsets, colors_out);
655 }
656
657
658 /**
659 * Generate code to sample a mipmap level with linear filtering.
660 * If sampling a cube texture, r = cube face in [0,5].
661 */
662 static void
663 lp_build_sample_image_linear(struct lp_build_sample_context *bld,
664 unsigned sampler_unit,
665 LLVMValueRef size,
666 LLVMValueRef row_stride_vec,
667 LLVMValueRef img_stride_vec,
668 LLVMValueRef data_ptr,
669 LLVMValueRef mipoffsets,
670 LLVMValueRef s,
671 LLVMValueRef t,
672 LLVMValueRef r,
673 LLVMValueRef colors_out[4])
674 {
675 const unsigned dims = bld->dims;
676 LLVMValueRef width_vec;
677 LLVMValueRef height_vec;
678 LLVMValueRef depth_vec;
679 LLVMValueRef flt_size;
680 LLVMValueRef flt_width_vec;
681 LLVMValueRef flt_height_vec;
682 LLVMValueRef flt_depth_vec;
683 LLVMValueRef x0, y0 = NULL, z0 = NULL, x1, y1 = NULL, z1 = NULL;
684 LLVMValueRef s_fpart, t_fpart = NULL, r_fpart = NULL;
685 LLVMValueRef neighbors[2][2][4];
686 int chan;
687
688 lp_build_extract_image_sizes(bld,
689 &bld->int_size_bld,
690 bld->int_coord_type,
691 size,
692 &width_vec, &height_vec, &depth_vec);
693
694 flt_size = lp_build_int_to_float(&bld->float_size_bld, size);
695
696 lp_build_extract_image_sizes(bld,
697 &bld->float_size_bld,
698 bld->coord_type,
699 flt_size,
700 &flt_width_vec, &flt_height_vec, &flt_depth_vec);
701
702 /*
703 * Compute integer texcoords.
704 */
705 lp_build_sample_wrap_linear(bld, s, width_vec, flt_width_vec,
706 bld->static_texture_state->pot_width,
707 bld->static_sampler_state->wrap_s,
708 &x0, &x1, &s_fpart);
709 lp_build_name(x0, "tex.x0.wrapped");
710 lp_build_name(x1, "tex.x1.wrapped");
711
712 if (dims >= 2) {
713 lp_build_sample_wrap_linear(bld, t, height_vec, flt_height_vec,
714 bld->static_texture_state->pot_height,
715 bld->static_sampler_state->wrap_t,
716 &y0, &y1, &t_fpart);
717 lp_build_name(y0, "tex.y0.wrapped");
718 lp_build_name(y1, "tex.y1.wrapped");
719
720 if (dims == 3) {
721 lp_build_sample_wrap_linear(bld, r, depth_vec, flt_depth_vec,
722 bld->static_texture_state->pot_depth,
723 bld->static_sampler_state->wrap_r,
724 &z0, &z1, &r_fpart);
725 lp_build_name(z0, "tex.z0.wrapped");
726 lp_build_name(z1, "tex.z1.wrapped");
727 }
728 }
729 if (bld->static_texture_state->target == PIPE_TEXTURE_CUBE ||
730 bld->static_texture_state->target == PIPE_TEXTURE_1D_ARRAY ||
731 bld->static_texture_state->target == PIPE_TEXTURE_2D_ARRAY) {
732 z0 = z1 = r; /* cube face or array layer */
733 lp_build_name(z0, "tex.z0.layer");
734 lp_build_name(z1, "tex.z1.layer");
735 }
736
737
738 /*
739 * Get texture colors.
740 */
741 /* get x0/x1 texels */
742 lp_build_sample_texel_soa(bld, sampler_unit,
743 width_vec, height_vec, depth_vec,
744 x0, y0, z0,
745 row_stride_vec, img_stride_vec,
746 data_ptr, mipoffsets, neighbors[0][0]);
747 lp_build_sample_texel_soa(bld, sampler_unit,
748 width_vec, height_vec, depth_vec,
749 x1, y0, z0,
750 row_stride_vec, img_stride_vec,
751 data_ptr, mipoffsets, neighbors[0][1]);
752
753 if (dims == 1) {
754 /* Interpolate two samples from 1D image to produce one color */
755 for (chan = 0; chan < 4; chan++) {
756 colors_out[chan] = lp_build_lerp(&bld->texel_bld, s_fpart,
757 neighbors[0][0][chan],
758 neighbors[0][1][chan]);
759 }
760 }
761 else {
762 /* 2D/3D texture */
763 LLVMValueRef colors0[4];
764
765 /* get x0/x1 texels at y1 */
766 lp_build_sample_texel_soa(bld, sampler_unit,
767 width_vec, height_vec, depth_vec,
768 x0, y1, z0,
769 row_stride_vec, img_stride_vec,
770 data_ptr, mipoffsets, neighbors[1][0]);
771 lp_build_sample_texel_soa(bld, sampler_unit,
772 width_vec, height_vec, depth_vec,
773 x1, y1, z0,
774 row_stride_vec, img_stride_vec,
775 data_ptr, mipoffsets, neighbors[1][1]);
776
777 /* Bilinear interpolate the four samples from the 2D image / 3D slice */
778 for (chan = 0; chan < 4; chan++) {
779 colors0[chan] = lp_build_lerp_2d(&bld->texel_bld,
780 s_fpart, t_fpart,
781 neighbors[0][0][chan],
782 neighbors[0][1][chan],
783 neighbors[1][0][chan],
784 neighbors[1][1][chan]);
785 }
786
787 if (dims == 3) {
788 LLVMValueRef neighbors1[2][2][4];
789 LLVMValueRef colors1[4];
790
791 /* get x0/x1/y0/y1 texels at z1 */
792 lp_build_sample_texel_soa(bld, sampler_unit,
793 width_vec, height_vec, depth_vec,
794 x0, y0, z1,
795 row_stride_vec, img_stride_vec,
796 data_ptr, mipoffsets, neighbors1[0][0]);
797 lp_build_sample_texel_soa(bld, sampler_unit,
798 width_vec, height_vec, depth_vec,
799 x1, y0, z1,
800 row_stride_vec, img_stride_vec,
801 data_ptr, mipoffsets, neighbors1[0][1]);
802 lp_build_sample_texel_soa(bld, sampler_unit,
803 width_vec, height_vec, depth_vec,
804 x0, y1, z1,
805 row_stride_vec, img_stride_vec,
806 data_ptr, mipoffsets, neighbors1[1][0]);
807 lp_build_sample_texel_soa(bld, sampler_unit,
808 width_vec, height_vec, depth_vec,
809 x1, y1, z1,
810 row_stride_vec, img_stride_vec,
811 data_ptr, mipoffsets, neighbors1[1][1]);
812
813 /* Bilinear interpolate the four samples from the second Z slice */
814 for (chan = 0; chan < 4; chan++) {
815 colors1[chan] = lp_build_lerp_2d(&bld->texel_bld,
816 s_fpart, t_fpart,
817 neighbors1[0][0][chan],
818 neighbors1[0][1][chan],
819 neighbors1[1][0][chan],
820 neighbors1[1][1][chan]);
821 }
822
823 /* Linearly interpolate the two samples from the two 3D slices */
824 for (chan = 0; chan < 4; chan++) {
825 colors_out[chan] = lp_build_lerp(&bld->texel_bld,
826 r_fpart,
827 colors0[chan], colors1[chan]);
828 }
829 }
830 else {
831 /* 2D tex */
832 for (chan = 0; chan < 4; chan++) {
833 colors_out[chan] = colors0[chan];
834 }
835 }
836 }
837 }
838
839
840 /**
841 * Sample the texture/mipmap using given image filter and mip filter.
842 * data0_ptr and data1_ptr point to the two mipmap levels to sample
843 * from. width0/1_vec, height0/1_vec, depth0/1_vec indicate their sizes.
844 * If we're using nearest miplevel sampling the '1' values will be null/unused.
845 */
846 static void
847 lp_build_sample_mipmap(struct lp_build_sample_context *bld,
848 unsigned sampler_unit,
849 unsigned img_filter,
850 unsigned mip_filter,
851 LLVMValueRef s,
852 LLVMValueRef t,
853 LLVMValueRef r,
854 LLVMValueRef ilevel0,
855 LLVMValueRef ilevel1,
856 LLVMValueRef lod_fpart,
857 LLVMValueRef *colors_out)
858 {
859 LLVMBuilderRef builder = bld->gallivm->builder;
860 LLVMValueRef size0 = NULL;
861 LLVMValueRef size1 = NULL;
862 LLVMValueRef row_stride0_vec = NULL;
863 LLVMValueRef row_stride1_vec = NULL;
864 LLVMValueRef img_stride0_vec = NULL;
865 LLVMValueRef img_stride1_vec = NULL;
866 LLVMValueRef data_ptr0 = NULL;
867 LLVMValueRef data_ptr1 = NULL;
868 LLVMValueRef mipoff0 = NULL;
869 LLVMValueRef mipoff1 = NULL;
870 LLVMValueRef colors0[4], colors1[4];
871 unsigned chan;
872
873 /* sample the first mipmap level */
874 lp_build_mipmap_level_sizes(bld, ilevel0,
875 &size0,
876 &row_stride0_vec, &img_stride0_vec);
877 if (bld->num_lods == 1) {
878 data_ptr0 = lp_build_get_mipmap_level(bld, ilevel0);
879 }
880 else {
881 /* This path should work for num_lods 1 too but slightly less efficient */
882 data_ptr0 = bld->base_ptr;
883 mipoff0 = lp_build_get_mip_offsets(bld, ilevel0);
884 }
885 if (img_filter == PIPE_TEX_FILTER_NEAREST) {
886 lp_build_sample_image_nearest(bld, sampler_unit,
887 size0,
888 row_stride0_vec, img_stride0_vec,
889 data_ptr0, mipoff0, s, t, r,
890 colors0);
891 }
892 else {
893 assert(img_filter == PIPE_TEX_FILTER_LINEAR);
894 lp_build_sample_image_linear(bld, sampler_unit,
895 size0,
896 row_stride0_vec, img_stride0_vec,
897 data_ptr0, mipoff0, s, t, r,
898 colors0);
899 }
900
901 /* Store the first level's colors in the output variables */
902 for (chan = 0; chan < 4; chan++) {
903 LLVMBuildStore(builder, colors0[chan], colors_out[chan]);
904 }
905
906 if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
907 struct lp_build_if_state if_ctx;
908 LLVMValueRef need_lerp;
909 unsigned num_quads = bld->coord_bld.type.length / 4;
910
911 /* need_lerp = lod_fpart > 0 */
912 if (num_quads == 1) {
913 need_lerp = LLVMBuildFCmp(builder, LLVMRealUGT,
914 lod_fpart, bld->perquadf_bld.zero,
915 "need_lerp");
916 }
917 else {
918 /*
919 * We'll do mip filtering if any of the quads need it.
920 * It might be better to split the vectors here and only fetch/filter
921 * quads which need it.
922 */
923 /*
924 * We unfortunately need to clamp lod_fpart here since we can get
925 * negative values which would screw up filtering if not all
926 * lod_fpart values have same sign.
927 */
928 lod_fpart = lp_build_max(&bld->perquadf_bld, lod_fpart,
929 bld->perquadf_bld.zero);
930 need_lerp = lp_build_compare(bld->gallivm, bld->perquadf_bld.type,
931 PIPE_FUNC_GREATER,
932 lod_fpart, bld->perquadf_bld.zero);
933 need_lerp = lp_build_any_true_range(&bld->perquadi_bld, num_quads, need_lerp);
934 }
935
936 lp_build_if(&if_ctx, bld->gallivm, need_lerp);
937 {
938 /* sample the second mipmap level */
939 lp_build_mipmap_level_sizes(bld, ilevel1,
940 &size1,
941 &row_stride1_vec, &img_stride1_vec);
942 if (bld->num_lods == 1) {
943 data_ptr1 = lp_build_get_mipmap_level(bld, ilevel1);
944 }
945 else {
946 data_ptr1 = bld->base_ptr;
947 mipoff1 = lp_build_get_mip_offsets(bld, ilevel1);
948 }
949 if (img_filter == PIPE_TEX_FILTER_NEAREST) {
950 lp_build_sample_image_nearest(bld, sampler_unit,
951 size1,
952 row_stride1_vec, img_stride1_vec,
953 data_ptr1, mipoff1, s, t, r,
954 colors1);
955 }
956 else {
957 lp_build_sample_image_linear(bld, sampler_unit,
958 size1,
959 row_stride1_vec, img_stride1_vec,
960 data_ptr1, mipoff1, s, t, r,
961 colors1);
962 }
963
964 /* interpolate samples from the two mipmap levels */
965
966 lod_fpart = lp_build_unpack_broadcast_aos_scalars(bld->gallivm,
967 bld->perquadf_bld.type,
968 bld->texel_bld.type,
969 lod_fpart);
970
971 for (chan = 0; chan < 4; chan++) {
972 colors0[chan] = lp_build_lerp(&bld->texel_bld, lod_fpart,
973 colors0[chan], colors1[chan]);
974 LLVMBuildStore(builder, colors0[chan], colors_out[chan]);
975 }
976 }
977 lp_build_endif(&if_ctx);
978 }
979 }
980
981
982 /**
983 * Clamp layer coord to valid values.
984 */
985 static LLVMValueRef
986 lp_build_layer_coord(struct lp_build_sample_context *bld,
987 unsigned texture_unit,
988 LLVMValueRef layer)
989 {
990 LLVMValueRef maxlayer;
991
992 maxlayer = bld->dynamic_state->depth(bld->dynamic_state,
993 bld->gallivm, texture_unit);
994 maxlayer = lp_build_sub(&bld->int_bld, maxlayer, bld->int_bld.one);
995 maxlayer = lp_build_broadcast_scalar(&bld->int_coord_bld, maxlayer);
996 return lp_build_clamp(&bld->int_coord_bld, layer,
997 bld->int_coord_bld.zero, maxlayer);
998
999 }
1000
1001
1002 /**
1003 * Calculate cube face, lod, mip levels.
1004 */
1005 static void
1006 lp_build_sample_common(struct lp_build_sample_context *bld,
1007 unsigned texture_index,
1008 unsigned sampler_index,
1009 LLVMValueRef *s,
1010 LLVMValueRef *t,
1011 LLVMValueRef *r,
1012 const struct lp_derivatives *derivs,
1013 LLVMValueRef lod_bias, /* optional */
1014 LLVMValueRef explicit_lod, /* optional */
1015 LLVMValueRef *lod_ipart,
1016 LLVMValueRef *lod_fpart,
1017 LLVMValueRef *ilevel0,
1018 LLVMValueRef *ilevel1)
1019 {
1020 const unsigned mip_filter = bld->static_sampler_state->min_mip_filter;
1021 const unsigned min_filter = bld->static_sampler_state->min_img_filter;
1022 const unsigned mag_filter = bld->static_sampler_state->mag_img_filter;
1023 const unsigned target = bld->static_texture_state->target;
1024 LLVMValueRef first_level;
1025 struct lp_derivatives face_derivs;
1026
1027 /*
1028 printf("%s mip %d min %d mag %d\n", __FUNCTION__,
1029 mip_filter, min_filter, mag_filter);
1030 */
1031
1032 /*
1033 * Choose cube face, recompute texcoords and derivatives for the chosen face.
1034 */
1035 if (target == PIPE_TEXTURE_CUBE) {
1036 LLVMValueRef face, face_s, face_t;
1037 lp_build_cube_lookup(bld, *s, *t, *r, &face, &face_s, &face_t);
1038 *s = face_s; /* vec */
1039 *t = face_t; /* vec */
1040 /* use 'r' to indicate cube face */
1041 *r = face; /* vec */
1042
1043 /* recompute ddx, ddy using the new (s,t) face texcoords */
1044 face_derivs.ddx_ddy[0] = lp_build_packed_ddx_ddy_twocoord(&bld->coord_bld, *s, *t);
1045 face_derivs.ddx_ddy[1] = NULL;
1046 derivs = &face_derivs;
1047 }
1048 else if (target == PIPE_TEXTURE_1D_ARRAY) {
1049 *r = lp_build_iround(&bld->coord_bld, *t);
1050 *r = lp_build_layer_coord(bld, texture_index, *r);
1051 }
1052 else if (target == PIPE_TEXTURE_2D_ARRAY) {
1053 *r = lp_build_iround(&bld->coord_bld, *r);
1054 *r = lp_build_layer_coord(bld, texture_index, *r);
1055 }
1056
1057 /*
1058 * Compute the level of detail (float).
1059 */
1060 if (min_filter != mag_filter ||
1061 mip_filter != PIPE_TEX_MIPFILTER_NONE) {
1062 /* Need to compute lod either to choose mipmap levels or to
1063 * distinguish between minification/magnification with one mipmap level.
1064 */
1065 lp_build_lod_selector(bld, texture_index, sampler_index,
1066 derivs, lod_bias, explicit_lod,
1067 mip_filter,
1068 lod_ipart, lod_fpart);
1069 } else {
1070 *lod_ipart = bld->perquadi_bld.zero;
1071 }
1072
1073 /*
1074 * Compute integer mipmap level(s) to fetch texels from: ilevel0, ilevel1
1075 */
1076 switch (mip_filter) {
1077 default:
1078 assert(0 && "bad mip_filter value in lp_build_sample_soa()");
1079 /* fall-through */
1080 case PIPE_TEX_MIPFILTER_NONE:
1081 /* always use mip level 0 */
1082 if (target == PIPE_TEXTURE_CUBE) {
1083 /* XXX this is a work-around for an apparent bug in LLVM 2.7.
1084 * We should be able to set ilevel0 = const(0) but that causes
1085 * bad x86 code to be emitted.
1086 * XXX should probably disable that on other llvm versions.
1087 */
1088 assert(*lod_ipart);
1089 lp_build_nearest_mip_level(bld, texture_index, *lod_ipart, ilevel0);
1090 }
1091 else {
1092 first_level = bld->dynamic_state->first_level(bld->dynamic_state,
1093 bld->gallivm, texture_index);
1094 first_level = lp_build_broadcast_scalar(&bld->perquadi_bld, first_level);
1095 *ilevel0 = first_level;
1096 }
1097 break;
1098 case PIPE_TEX_MIPFILTER_NEAREST:
1099 assert(*lod_ipart);
1100 lp_build_nearest_mip_level(bld, texture_index, *lod_ipart, ilevel0);
1101 break;
1102 case PIPE_TEX_MIPFILTER_LINEAR:
1103 assert(*lod_ipart);
1104 assert(*lod_fpart);
1105 lp_build_linear_mip_levels(bld, texture_index,
1106 *lod_ipart, lod_fpart,
1107 ilevel0, ilevel1);
1108 break;
1109 }
1110 }
1111
1112 /**
1113 * General texture sampling codegen.
1114 * This function handles texture sampling for all texture targets (1D,
1115 * 2D, 3D, cube) and all filtering modes.
1116 */
1117 static void
1118 lp_build_sample_general(struct lp_build_sample_context *bld,
1119 unsigned sampler_unit,
1120 LLVMValueRef s,
1121 LLVMValueRef t,
1122 LLVMValueRef r,
1123 LLVMValueRef lod_ipart,
1124 LLVMValueRef lod_fpart,
1125 LLVMValueRef ilevel0,
1126 LLVMValueRef ilevel1,
1127 LLVMValueRef *colors_out)
1128 {
1129 struct lp_build_context *int_bld = &bld->int_bld;
1130 LLVMBuilderRef builder = bld->gallivm->builder;
1131 const unsigned mip_filter = bld->static_sampler_state->min_mip_filter;
1132 const unsigned min_filter = bld->static_sampler_state->min_img_filter;
1133 const unsigned mag_filter = bld->static_sampler_state->mag_img_filter;
1134 LLVMValueRef texels[4];
1135 unsigned chan;
1136
1137 /*
1138 * Get/interpolate texture colors.
1139 */
1140
1141 for (chan = 0; chan < 4; ++chan) {
1142 texels[chan] = lp_build_alloca(bld->gallivm, bld->texel_bld.vec_type, "");
1143 lp_build_name(texels[chan], "sampler%u_texel_%c_var", sampler_unit, "xyzw"[chan]);
1144 }
1145
1146 if (min_filter == mag_filter) {
1147 /* no need to distinguish between minification and magnification */
1148 lp_build_sample_mipmap(bld, sampler_unit,
1149 min_filter, mip_filter,
1150 s, t, r,
1151 ilevel0, ilevel1, lod_fpart,
1152 texels);
1153 }
1154 else {
1155 /* Emit conditional to choose min image filter or mag image filter
1156 * depending on the lod being > 0 or <= 0, respectively.
1157 */
1158 struct lp_build_if_state if_ctx;
1159 LLVMValueRef minify;
1160
1161 /*
1162 * XXX this should to all lods into account, if some are min
1163 * some max probably could hack up the coords/weights in the linear
1164 * path with selects to work for nearest.
1165 * If that's just two quads sitting next to each other it seems
1166 * quite ok to do the same filtering method on both though, at
1167 * least unless we have explicit lod (and who uses different
1168 * min/mag filter with that?)
1169 */
1170 if (bld->num_lods > 1)
1171 lod_ipart = LLVMBuildExtractElement(builder, lod_ipart,
1172 lp_build_const_int32(bld->gallivm, 0), "");
1173
1174 /* minify = lod >= 0.0 */
1175 minify = LLVMBuildICmp(builder, LLVMIntSGE,
1176 lod_ipart, int_bld->zero, "");
1177
1178 lp_build_if(&if_ctx, bld->gallivm, minify);
1179 {
1180 /* Use the minification filter */
1181 lp_build_sample_mipmap(bld, sampler_unit,
1182 min_filter, mip_filter,
1183 s, t, r,
1184 ilevel0, ilevel1, lod_fpart,
1185 texels);
1186 }
1187 lp_build_else(&if_ctx);
1188 {
1189 /* Use the magnification filter */
1190 lp_build_sample_mipmap(bld, sampler_unit,
1191 mag_filter, PIPE_TEX_MIPFILTER_NONE,
1192 s, t, r,
1193 ilevel0, NULL, NULL,
1194 texels);
1195 }
1196 lp_build_endif(&if_ctx);
1197 }
1198
1199 for (chan = 0; chan < 4; ++chan) {
1200 colors_out[chan] = LLVMBuildLoad(builder, texels[chan], "");
1201 lp_build_name(colors_out[chan], "sampler%u_texel_%c", sampler_unit, "xyzw"[chan]);
1202 }
1203 }
1204
1205
1206 /**
1207 * Texel fetch function.
1208 * In contrast to general sampling there is no filtering, no coord minification,
1209 * lod (if any) is always explicit uint, coords are uints (in terms of texel units)
1210 * directly to be applied to the selected mip level (after adding texel offsets).
1211 * This function handles texel fetch for all targets where texel fetch is supported
1212 * (no cube maps, but 1d, 2d, 3d are supported, arrays and buffers should be too).
1213 */
1214 static void
1215 lp_build_fetch_texel(struct lp_build_sample_context *bld,
1216 unsigned texture_unit,
1217 const LLVMValueRef *coords,
1218 LLVMValueRef explicit_lod,
1219 const LLVMValueRef *offsets,
1220 LLVMValueRef *colors_out)
1221 {
1222 struct lp_build_context *perquadi_bld = &bld->perquadi_bld;
1223 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
1224 unsigned dims = bld->dims, chan;
1225 unsigned target = bld->static_texture_state->target;
1226 LLVMValueRef size, ilevel;
1227 LLVMValueRef row_stride_vec = NULL, img_stride_vec = NULL;
1228 LLVMValueRef x = coords[0], y = coords[1], z = coords[2];
1229 LLVMValueRef width, height, depth, i, j;
1230 LLVMValueRef offset, out_of_bounds, out1;
1231
1232 /* XXX just like ordinary sampling, we don't handle per-pixel lod (yet). */
1233 if (explicit_lod && bld->static_texture_state->target != PIPE_BUFFER) {
1234 ilevel = lp_build_pack_aos_scalars(bld->gallivm, int_coord_bld->type,
1235 perquadi_bld->type, explicit_lod, 0);
1236 lp_build_nearest_mip_level(bld, texture_unit, ilevel, &ilevel);
1237 }
1238 else {
1239 bld->num_lods = 1;
1240 ilevel = lp_build_const_int32(bld->gallivm, 0);
1241 }
1242 lp_build_mipmap_level_sizes(bld, ilevel,
1243 &size,
1244 &row_stride_vec, &img_stride_vec);
1245 lp_build_extract_image_sizes(bld, &bld->int_size_bld, int_coord_bld->type,
1246 size, &width, &height, &depth);
1247
1248 if (target == PIPE_TEXTURE_1D_ARRAY ||
1249 target == PIPE_TEXTURE_2D_ARRAY) {
1250 if (target == PIPE_TEXTURE_1D_ARRAY) {
1251 z = lp_build_layer_coord(bld, texture_unit, y);
1252 }
1253 else {
1254 z = lp_build_layer_coord(bld, texture_unit, z);
1255 }
1256 }
1257
1258 /* This is a lot like border sampling */
1259 if (offsets[0]) {
1260 /* XXX coords are really unsigned, offsets are signed */
1261 x = lp_build_add(int_coord_bld, x, offsets[0]);
1262 }
1263 out_of_bounds = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, x, int_coord_bld->zero);
1264 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, x, width);
1265 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1266
1267 if (dims >= 2) {
1268 if (offsets[1]) {
1269 y = lp_build_add(int_coord_bld, y, offsets[1]);
1270 }
1271 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, y, int_coord_bld->zero);
1272 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1273 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, y, height);
1274 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1275
1276 if (dims >= 3) {
1277 if (offsets[2]) {
1278 z = lp_build_add(int_coord_bld, z, offsets[2]);
1279 }
1280 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, z, int_coord_bld->zero);
1281 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1282 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, z, depth);
1283 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1284 }
1285 }
1286
1287 lp_build_sample_offset(int_coord_bld,
1288 bld->format_desc,
1289 x, y, z, row_stride_vec, img_stride_vec,
1290 &offset, &i, &j);
1291
1292 if (bld->static_texture_state->target != PIPE_BUFFER) {
1293 offset = lp_build_add(int_coord_bld, offset,
1294 lp_build_get_mip_offsets(bld, ilevel));
1295 }
1296
1297 offset = lp_build_andnot(int_coord_bld, offset, out_of_bounds);
1298
1299 lp_build_fetch_rgba_soa(bld->gallivm,
1300 bld->format_desc,
1301 bld->texel_type,
1302 bld->base_ptr, offset,
1303 i, j,
1304 colors_out);
1305
1306 if (0) {
1307 /*
1308 * Not needed except for ARB_robust_buffer_access_behavior.
1309 * Could use min/max above instead of out-of-bounds comparisons
1310 * (in fact cast to unsigned and min only is sufficient)
1311 * if we don't care about the result returned for out-of-bounds.
1312 */
1313 for (chan = 0; chan < 4; chan++) {
1314 colors_out[chan] = lp_build_select(&bld->texel_bld, out_of_bounds,
1315 bld->texel_bld.zero, colors_out[chan]);
1316 }
1317 }
1318 }
1319
1320
1321 /**
1322 * Do shadow test/comparison.
1323 * \param coords incoming texcoords
1324 * \param texel the texel to compare against (use the X channel)
1325 * Ideally this should really be done per-sample.
1326 */
1327 static void
1328 lp_build_sample_compare(struct lp_build_sample_context *bld,
1329 const LLVMValueRef *coords,
1330 LLVMValueRef texel[4])
1331 {
1332 struct lp_build_context *texel_bld = &bld->texel_bld;
1333 LLVMBuilderRef builder = bld->gallivm->builder;
1334 LLVMValueRef res, p;
1335 const unsigned chan = 0;
1336
1337 if (bld->static_sampler_state->compare_mode == PIPE_TEX_COMPARE_NONE)
1338 return;
1339
1340 if (bld->static_texture_state->target == PIPE_TEXTURE_2D_ARRAY ||
1341 bld->static_texture_state->target == PIPE_TEXTURE_CUBE) {
1342 p = coords[3];
1343 }
1344 else {
1345 p = coords[2];
1346 }
1347
1348 /* debug code */
1349 if (0) {
1350 LLVMValueRef indx = lp_build_const_int32(bld->gallivm, 0);
1351 LLVMValueRef coord = LLVMBuildExtractElement(builder, p, indx, "");
1352 LLVMValueRef tex = LLVMBuildExtractElement(builder, texel[chan], indx, "");
1353 lp_build_printf(bld->gallivm, "shadow compare coord %f to texture %f\n",
1354 coord, tex);
1355 }
1356
1357 /* Clamp p coords to [0,1] */
1358 p = lp_build_clamp(&bld->coord_bld, p,
1359 bld->coord_bld.zero,
1360 bld->coord_bld.one);
1361
1362 /* result = (p FUNC texel) ? 1 : 0 */
1363 res = lp_build_cmp(texel_bld, bld->static_sampler_state->compare_func,
1364 p, texel[chan]);
1365 res = lp_build_select(texel_bld, res, texel_bld->one, texel_bld->zero);
1366
1367 /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */
1368 texel[0] =
1369 texel[1] =
1370 texel[2] = res;
1371 texel[3] = texel_bld->one;
1372 }
1373
1374
1375 /**
1376 * Just set texels to white instead of actually sampling the texture.
1377 * For debugging.
1378 */
1379 void
1380 lp_build_sample_nop(struct gallivm_state *gallivm,
1381 struct lp_type type,
1382 const LLVMValueRef *coords,
1383 LLVMValueRef texel_out[4])
1384 {
1385 LLVMValueRef one = lp_build_one(gallivm, type);
1386 unsigned chan;
1387
1388 for (chan = 0; chan < 4; chan++) {
1389 texel_out[chan] = one;
1390 }
1391 }
1392
1393
1394 /**
1395 * Build texture sampling code.
1396 * 'texel' will return a vector of four LLVMValueRefs corresponding to
1397 * R, G, B, A.
1398 * \param type vector float type to use for coords, etc.
1399 * \param is_fetch if this is a texel fetch instruction.
1400 * \param derivs partial derivatives of (s,t,r,q) with respect to x and y
1401 */
1402 void
1403 lp_build_sample_soa(struct gallivm_state *gallivm,
1404 const struct lp_static_texture_state *static_texture_state,
1405 const struct lp_static_sampler_state *static_sampler_state,
1406 struct lp_sampler_dynamic_state *dynamic_state,
1407 struct lp_type type,
1408 boolean is_fetch,
1409 unsigned texture_index,
1410 unsigned sampler_index,
1411 const LLVMValueRef *coords,
1412 const LLVMValueRef *offsets,
1413 const struct lp_derivatives *derivs,
1414 LLVMValueRef lod_bias, /* optional */
1415 LLVMValueRef explicit_lod, /* optional */
1416 LLVMValueRef texel_out[4])
1417 {
1418 unsigned dims = texture_dims(static_texture_state->target);
1419 unsigned num_quads = type.length / 4;
1420 unsigned mip_filter;
1421 struct lp_build_sample_context bld;
1422 struct lp_static_sampler_state derived_sampler_state = *static_sampler_state;
1423 LLVMTypeRef i32t = LLVMInt32TypeInContext(gallivm->context);
1424 LLVMBuilderRef builder = gallivm->builder;
1425 LLVMValueRef tex_width, tex_height, tex_depth;
1426 LLVMValueRef s;
1427 LLVMValueRef t;
1428 LLVMValueRef r;
1429
1430 if (0) {
1431 enum pipe_format fmt = static_texture_state->format;
1432 debug_printf("Sample from %s\n", util_format_name(fmt));
1433 }
1434
1435 assert(type.floating);
1436
1437 /* Setup our build context */
1438 memset(&bld, 0, sizeof bld);
1439 bld.gallivm = gallivm;
1440 bld.static_sampler_state = &derived_sampler_state;
1441 bld.static_texture_state = static_texture_state;
1442 bld.dynamic_state = dynamic_state;
1443 bld.format_desc = util_format_description(static_texture_state->format);
1444 bld.dims = dims;
1445
1446 bld.vector_width = lp_type_width(type);
1447
1448 bld.float_type = lp_type_float(32);
1449 bld.int_type = lp_type_int(32);
1450 bld.coord_type = type;
1451 bld.int_coord_type = lp_int_type(type);
1452 bld.float_size_in_type = lp_type_float(32);
1453 bld.float_size_in_type.length = dims > 1 ? 4 : 1;
1454 bld.int_size_in_type = lp_int_type(bld.float_size_in_type);
1455 bld.texel_type = type;
1456 bld.perquadf_type = type;
1457 /* we want native vector size to be able to use our intrinsics */
1458 bld.perquadf_type.length = type.length > 4 ? ((type.length + 15) / 16) * 4 : 1;
1459 bld.perquadi_type = lp_int_type(bld.perquadf_type);
1460
1461 /* always using the first channel hopefully should be safe,
1462 * if not things WILL break in other places anyway.
1463 */
1464 if (bld.format_desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB &&
1465 bld.format_desc->channel[0].pure_integer) {
1466 if (bld.format_desc->channel[0].type == UTIL_FORMAT_TYPE_SIGNED) {
1467 bld.texel_type = lp_type_int_vec(type.width, type.width * type.length);
1468 }
1469 else if (bld.format_desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED) {
1470 bld.texel_type = lp_type_uint_vec(type.width, type.width * type.length);
1471 }
1472 }
1473
1474 if (!static_texture_state->level_zero_only) {
1475 derived_sampler_state.min_mip_filter = static_sampler_state->min_mip_filter;
1476 } else {
1477 derived_sampler_state.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
1478 }
1479 mip_filter = derived_sampler_state.min_mip_filter;
1480
1481 if (0) {
1482 debug_printf(" .min_mip_filter = %u\n", derived_sampler_state.min_mip_filter);
1483 }
1484
1485 /*
1486 * There are other situations where at least the multiple int lods could be
1487 * avoided like min and max lod being equal.
1488 */
1489 if ((is_fetch && explicit_lod && bld.static_texture_state->target != PIPE_BUFFER) ||
1490 (!is_fetch && mip_filter != PIPE_TEX_MIPFILTER_NONE)) {
1491 bld.num_lods = num_quads;
1492 }
1493 else {
1494 bld.num_lods = 1;
1495 }
1496
1497 bld.float_size_type = bld.float_size_in_type;
1498 bld.float_size_type.length = bld.num_lods > 1 ? type.length :
1499 bld.float_size_in_type.length;
1500 bld.int_size_type = lp_int_type(bld.float_size_type);
1501
1502 lp_build_context_init(&bld.float_bld, gallivm, bld.float_type);
1503 lp_build_context_init(&bld.float_vec_bld, gallivm, type);
1504 lp_build_context_init(&bld.int_bld, gallivm, bld.int_type);
1505 lp_build_context_init(&bld.coord_bld, gallivm, bld.coord_type);
1506 lp_build_context_init(&bld.int_coord_bld, gallivm, bld.int_coord_type);
1507 lp_build_context_init(&bld.int_size_in_bld, gallivm, bld.int_size_in_type);
1508 lp_build_context_init(&bld.float_size_in_bld, gallivm, bld.float_size_in_type);
1509 lp_build_context_init(&bld.int_size_bld, gallivm, bld.int_size_type);
1510 lp_build_context_init(&bld.float_size_bld, gallivm, bld.float_size_type);
1511 lp_build_context_init(&bld.texel_bld, gallivm, bld.texel_type);
1512 lp_build_context_init(&bld.perquadf_bld, gallivm, bld.perquadf_type);
1513 lp_build_context_init(&bld.perquadi_bld, gallivm, bld.perquadi_type);
1514
1515 /* Get the dynamic state */
1516 tex_width = dynamic_state->width(dynamic_state, gallivm, texture_index);
1517 tex_height = dynamic_state->height(dynamic_state, gallivm, texture_index);
1518 tex_depth = dynamic_state->depth(dynamic_state, gallivm, texture_index);
1519 bld.row_stride_array = dynamic_state->row_stride(dynamic_state, gallivm, texture_index);
1520 bld.img_stride_array = dynamic_state->img_stride(dynamic_state, gallivm, texture_index);
1521 bld.base_ptr = dynamic_state->base_ptr(dynamic_state, gallivm, texture_index);
1522 bld.mip_offsets = dynamic_state->mip_offsets(dynamic_state, gallivm, texture_index);
1523 /* Note that mip_offsets is an array[level] of offsets to texture images */
1524
1525 s = coords[0];
1526 t = coords[1];
1527 r = coords[2];
1528
1529 /* width, height, depth as single int vector */
1530 if (dims <= 1) {
1531 bld.int_size = tex_width;
1532 }
1533 else {
1534 bld.int_size = LLVMBuildInsertElement(builder, bld.int_size_in_bld.undef,
1535 tex_width, LLVMConstInt(i32t, 0, 0), "");
1536 if (dims >= 2) {
1537 bld.int_size = LLVMBuildInsertElement(builder, bld.int_size,
1538 tex_height, LLVMConstInt(i32t, 1, 0), "");
1539 if (dims >= 3) {
1540 bld.int_size = LLVMBuildInsertElement(builder, bld.int_size,
1541 tex_depth, LLVMConstInt(i32t, 2, 0), "");
1542 }
1543 }
1544 }
1545
1546 if (0) {
1547 /* For debug: no-op texture sampling */
1548 lp_build_sample_nop(gallivm,
1549 bld.texel_type,
1550 coords,
1551 texel_out);
1552 }
1553
1554 else if (is_fetch) {
1555 lp_build_fetch_texel(&bld, texture_index, coords,
1556 explicit_lod, offsets,
1557 texel_out);
1558 }
1559
1560 else {
1561 LLVMValueRef lod_ipart = NULL, lod_fpart = NULL;
1562 LLVMValueRef ilevel0 = NULL, ilevel1 = NULL;
1563 boolean use_aos = util_format_fits_8unorm(bld.format_desc) &&
1564 lp_is_simple_wrap_mode(static_sampler_state->wrap_s) &&
1565 lp_is_simple_wrap_mode(static_sampler_state->wrap_t);
1566
1567 if ((gallivm_debug & GALLIVM_DEBUG_PERF) &&
1568 !use_aos && util_format_fits_8unorm(bld.format_desc)) {
1569 debug_printf("%s: using floating point linear filtering for %s\n",
1570 __FUNCTION__, bld.format_desc->short_name);
1571 debug_printf(" min_img %d mag_img %d mip %d wraps %d wrapt %d\n",
1572 static_sampler_state->min_img_filter,
1573 static_sampler_state->mag_img_filter,
1574 static_sampler_state->min_mip_filter,
1575 static_sampler_state->wrap_s,
1576 static_sampler_state->wrap_t);
1577 }
1578
1579 lp_build_sample_common(&bld, texture_index, sampler_index,
1580 &s, &t, &r,
1581 derivs, lod_bias, explicit_lod,
1582 &lod_ipart, &lod_fpart,
1583 &ilevel0, &ilevel1);
1584
1585 /*
1586 * we only try 8-wide sampling with soa as it appears to
1587 * be a loss with aos with AVX (but it should work).
1588 * (It should be faster if we'd support avx2)
1589 */
1590 if (num_quads == 1 || !use_aos) {
1591
1592 if (num_quads > 1) {
1593 if (mip_filter == PIPE_TEX_MIPFILTER_NONE) {
1594 LLVMValueRef index0 = lp_build_const_int32(gallivm, 0);
1595 /*
1596 * These parameters are the same for all quads,
1597 * could probably simplify.
1598 */
1599 lod_ipart = LLVMBuildExtractElement(builder, lod_ipart, index0, "");
1600 ilevel0 = LLVMBuildExtractElement(builder, ilevel0, index0, "");
1601 }
1602 }
1603 if (use_aos) {
1604 /* do sampling/filtering with fixed pt arithmetic */
1605 lp_build_sample_aos(&bld, sampler_index,
1606 s, t, r,
1607 lod_ipart, lod_fpart,
1608 ilevel0, ilevel1,
1609 texel_out);
1610 }
1611
1612 else {
1613 lp_build_sample_general(&bld, sampler_index,
1614 s, t, r,
1615 lod_ipart, lod_fpart,
1616 ilevel0, ilevel1,
1617 texel_out);
1618 }
1619 }
1620 else {
1621 unsigned j;
1622 struct lp_build_sample_context bld4;
1623 struct lp_type type4 = type;
1624 unsigned i;
1625 LLVMValueRef texelout4[4];
1626 LLVMValueRef texelouttmp[4][LP_MAX_VECTOR_LENGTH/16];
1627
1628 type4.length = 4;
1629
1630 /* Setup our build context */
1631 memset(&bld4, 0, sizeof bld4);
1632 bld4.gallivm = bld.gallivm;
1633 bld4.static_texture_state = bld.static_texture_state;
1634 bld4.static_sampler_state = bld.static_sampler_state;
1635 bld4.dynamic_state = bld.dynamic_state;
1636 bld4.format_desc = bld.format_desc;
1637 bld4.dims = bld.dims;
1638 bld4.row_stride_array = bld.row_stride_array;
1639 bld4.img_stride_array = bld.img_stride_array;
1640 bld4.base_ptr = bld.base_ptr;
1641 bld4.mip_offsets = bld.mip_offsets;
1642 bld4.int_size = bld.int_size;
1643
1644 bld4.vector_width = lp_type_width(type4);
1645
1646 bld4.float_type = lp_type_float(32);
1647 bld4.int_type = lp_type_int(32);
1648 bld4.coord_type = type4;
1649 bld4.int_coord_type = lp_int_type(type4);
1650 bld4.float_size_in_type = lp_type_float(32);
1651 bld4.float_size_in_type.length = dims > 1 ? 4 : 1;
1652 bld4.int_size_in_type = lp_int_type(bld4.float_size_in_type);
1653 bld4.texel_type = bld.texel_type;
1654 bld4.texel_type.length = 4;
1655 bld4.perquadf_type = type4;
1656 /* we want native vector size to be able to use our intrinsics */
1657 bld4.perquadf_type.length = 1;
1658 bld4.perquadi_type = lp_int_type(bld4.perquadf_type);
1659
1660 bld4.num_lods = 1;
1661 bld4.int_size_type = bld4.int_size_in_type;
1662 bld4.float_size_type = bld4.float_size_in_type;
1663
1664 lp_build_context_init(&bld4.float_bld, gallivm, bld4.float_type);
1665 lp_build_context_init(&bld4.float_vec_bld, gallivm, type4);
1666 lp_build_context_init(&bld4.int_bld, gallivm, bld4.int_type);
1667 lp_build_context_init(&bld4.coord_bld, gallivm, bld4.coord_type);
1668 lp_build_context_init(&bld4.int_coord_bld, gallivm, bld4.int_coord_type);
1669 lp_build_context_init(&bld4.int_size_in_bld, gallivm, bld4.int_size_in_type);
1670 lp_build_context_init(&bld4.float_size_in_bld, gallivm, bld4.float_size_in_type);
1671 lp_build_context_init(&bld4.int_size_bld, gallivm, bld4.int_size_type);
1672 lp_build_context_init(&bld4.float_size_bld, gallivm, bld4.float_size_type);
1673 lp_build_context_init(&bld4.texel_bld, gallivm, bld4.texel_type);
1674 lp_build_context_init(&bld4.perquadf_bld, gallivm, bld4.perquadf_type);
1675 lp_build_context_init(&bld4.perquadi_bld, gallivm, bld4.perquadi_type);
1676
1677 for (i = 0; i < num_quads; i++) {
1678 LLVMValueRef s4, t4, r4;
1679 LLVMValueRef lod_iparts, lod_fparts = NULL;
1680 LLVMValueRef ilevel0s, ilevel1s = NULL;
1681 LLVMValueRef indexi = lp_build_const_int32(gallivm, i);
1682
1683 s4 = lp_build_extract_range(gallivm, s, 4*i, 4);
1684 t4 = lp_build_extract_range(gallivm, t, 4*i, 4);
1685 r4 = lp_build_extract_range(gallivm, r, 4*i, 4);
1686 lod_iparts = LLVMBuildExtractElement(builder, lod_ipart, indexi, "");
1687 ilevel0s = LLVMBuildExtractElement(builder, ilevel0, indexi, "");
1688 if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
1689 ilevel1s = LLVMBuildExtractElement(builder, ilevel1, indexi, "");
1690 lod_fparts = LLVMBuildExtractElement(builder, lod_fpart, indexi, "");
1691 }
1692
1693 if (use_aos) {
1694 /* do sampling/filtering with fixed pt arithmetic */
1695 lp_build_sample_aos(&bld4, sampler_index,
1696 s4, t4, r4,
1697 lod_iparts, lod_fparts,
1698 ilevel0s, ilevel1s,
1699 texelout4);
1700 }
1701
1702 else {
1703 lp_build_sample_general(&bld4, sampler_index,
1704 s4, t4, r4,
1705 lod_iparts, lod_fparts,
1706 ilevel0s, ilevel1s,
1707 texelout4);
1708 }
1709 for (j = 0; j < 4; j++) {
1710 texelouttmp[j][i] = texelout4[j];
1711 }
1712 }
1713
1714 for (j = 0; j < 4; j++) {
1715 texel_out[j] = lp_build_concat(gallivm, texelouttmp[j], type4, num_quads);
1716 }
1717 }
1718
1719 lp_build_sample_compare(&bld, coords, texel_out);
1720 }
1721
1722 if (static_texture_state->target != PIPE_BUFFER) {
1723 apply_sampler_swizzle(&bld, texel_out);
1724 }
1725
1726 /*
1727 * texel type can be a (32bit) int/uint (for pure int formats only),
1728 * however we are expected to always return floats (storage is untyped).
1729 */
1730 if (!bld.texel_type.floating) {
1731 unsigned chan;
1732 for (chan = 0; chan < 4; chan++) {
1733 texel_out[chan] = LLVMBuildBitCast(builder, texel_out[chan],
1734 lp_build_vec_type(gallivm, type), "");
1735 }
1736 }
1737 }
1738
1739 void
1740 lp_build_size_query_soa(struct gallivm_state *gallivm,
1741 const struct lp_static_texture_state *static_state,
1742 struct lp_sampler_dynamic_state *dynamic_state,
1743 struct lp_type int_type,
1744 unsigned texture_unit,
1745 boolean need_nr_mips,
1746 LLVMValueRef explicit_lod,
1747 LLVMValueRef *sizes_out)
1748 {
1749 LLVMValueRef lod;
1750 LLVMValueRef size;
1751 LLVMValueRef first_level = NULL;
1752 int dims, i;
1753 boolean has_array;
1754 struct lp_build_context bld_int_vec;
1755
1756 dims = texture_dims(static_state->target);
1757
1758 switch (static_state->target) {
1759 case PIPE_TEXTURE_1D_ARRAY:
1760 case PIPE_TEXTURE_2D_ARRAY:
1761 has_array = TRUE;
1762 break;
1763 default:
1764 has_array = FALSE;
1765 break;
1766 }
1767
1768 assert(!int_type.floating);
1769
1770 lp_build_context_init(&bld_int_vec, gallivm, lp_type_int_vec(32, 128));
1771
1772 if (explicit_lod) {
1773 lod = LLVMBuildExtractElement(gallivm->builder, explicit_lod, lp_build_const_int32(gallivm, 0), "");
1774 first_level = dynamic_state->first_level(dynamic_state, gallivm, texture_unit);
1775 lod = lp_build_broadcast_scalar(&bld_int_vec,
1776 LLVMBuildAdd(gallivm->builder, lod, first_level, "lod"));
1777
1778 } else {
1779 lod = bld_int_vec.zero;
1780 }
1781
1782 if (need_nr_mips) {
1783 size = bld_int_vec.zero;
1784 }
1785 else {
1786 size = bld_int_vec.undef;
1787 }
1788
1789 size = LLVMBuildInsertElement(gallivm->builder, size,
1790 dynamic_state->width(dynamic_state, gallivm, texture_unit),
1791 lp_build_const_int32(gallivm, 0), "");
1792
1793 if (dims >= 2) {
1794 size = LLVMBuildInsertElement(gallivm->builder, size,
1795 dynamic_state->height(dynamic_state, gallivm, texture_unit),
1796 lp_build_const_int32(gallivm, 1), "");
1797 }
1798
1799 if (dims >= 3) {
1800 size = LLVMBuildInsertElement(gallivm->builder, size,
1801 dynamic_state->depth(dynamic_state, gallivm, texture_unit),
1802 lp_build_const_int32(gallivm, 2), "");
1803 }
1804
1805 size = lp_build_minify(&bld_int_vec, size, lod);
1806
1807 if (has_array)
1808 size = LLVMBuildInsertElement(gallivm->builder, size,
1809 dynamic_state->depth(dynamic_state, gallivm, texture_unit),
1810 lp_build_const_int32(gallivm, dims), "");
1811
1812 /*
1813 * XXX for out-of-bounds lod, should set size to zero vector here
1814 * (for dx10-style only, i.e. need_nr_mips)
1815 */
1816
1817 for (i = 0; i < dims + (has_array ? 1 : 0); i++) {
1818 sizes_out[i] = lp_build_extract_broadcast(gallivm, bld_int_vec.type, int_type,
1819 size,
1820 lp_build_const_int32(gallivm, i));
1821 }
1822
1823 /*
1824 * if there's no explicit_lod (buffers, rects) queries requiring nr of
1825 * mips would be illegal.
1826 */
1827 if (need_nr_mips && explicit_lod) {
1828 struct lp_build_context bld_int_scalar;
1829 LLVMValueRef num_levels;
1830 lp_build_context_init(&bld_int_scalar, gallivm, lp_type_int(32));
1831
1832 if (static_state->level_zero_only) {
1833 num_levels = bld_int_scalar.one;
1834 }
1835 else {
1836 LLVMValueRef last_level;
1837
1838 last_level = dynamic_state->last_level(dynamic_state, gallivm, texture_unit);
1839 num_levels = lp_build_sub(&bld_int_scalar, last_level, first_level);
1840 num_levels = lp_build_add(&bld_int_scalar, num_levels, bld_int_scalar.one);
1841 }
1842 sizes_out[3] = lp_build_broadcast(gallivm, lp_build_vec_type(gallivm, int_type),
1843 num_levels);
1844 }
1845 }