projects / mesa.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
gallivm: (trivial) fix int/uint border color clamping
[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 "util/u_format_rgb9e5.h"
46 #include "lp_bld_debug.h"
47 #include "lp_bld_type.h"
48 #include "lp_bld_const.h"
49 #include "lp_bld_conv.h"
50 #include "lp_bld_arit.h"
51 #include "lp_bld_bitarit.h"
52 #include "lp_bld_logic.h"
53 #include "lp_bld_printf.h"
54 #include "lp_bld_swizzle.h"
55 #include "lp_bld_flow.h"
56 #include "lp_bld_gather.h"
57 #include "lp_bld_format.h"
58 #include "lp_bld_sample.h"
59 #include "lp_bld_sample_aos.h"
60 #include "lp_bld_struct.h"
61 #include "lp_bld_quad.h"
62 #include "lp_bld_pack.h"
63
64
65 /**
66 * Generate code to fetch a texel from a texture at int coords (x, y, z).
67 * The computation depends on whether the texture is 1D, 2D or 3D.
68 * The result, texel, will be float vectors:
69 * texel[0] = red values
70 * texel[1] = green values
71 * texel[2] = blue values
72 * texel[3] = alpha values
73 */
74 static void
75 lp_build_sample_texel_soa(struct lp_build_sample_context *bld,
76 unsigned sampler_unit,
77 LLVMValueRef width,
78 LLVMValueRef height,
79 LLVMValueRef depth,
80 LLVMValueRef x,
81 LLVMValueRef y,
82 LLVMValueRef z,
83 LLVMValueRef y_stride,
84 LLVMValueRef z_stride,
85 LLVMValueRef data_ptr,
86 LLVMValueRef mipoffsets,
87 LLVMValueRef texel_out[4])
88 {
89 const struct lp_static_sampler_state *static_state = bld->static_sampler_state;
90 const unsigned dims = bld->dims;
91 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
92 LLVMBuilderRef builder = bld->gallivm->builder;
93 LLVMValueRef offset;
94 LLVMValueRef i, j;
95 LLVMValueRef use_border = NULL;
96
97 /* use_border = x < 0 || x >= width || y < 0 || y >= height */
98 if (lp_sampler_wrap_mode_uses_border_color(static_state->wrap_s,
99 static_state->min_img_filter,
100 static_state->mag_img_filter)) {
101 LLVMValueRef b1, b2;
102 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, x, int_coord_bld->zero);
103 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, x, width);
104 use_border = LLVMBuildOr(builder, b1, b2, "b1_or_b2");
105 }
106
107 if (dims >= 2 &&
108 lp_sampler_wrap_mode_uses_border_color(static_state->wrap_t,
109 static_state->min_img_filter,
110 static_state->mag_img_filter)) {
111 LLVMValueRef b1, b2;
112 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, y, int_coord_bld->zero);
113 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, y, height);
114 if (use_border) {
115 use_border = LLVMBuildOr(builder, use_border, b1, "ub_or_b1");
116 use_border = LLVMBuildOr(builder, use_border, b2, "ub_or_b2");
117 }
118 else {
119 use_border = LLVMBuildOr(builder, b1, b2, "b1_or_b2");
120 }
121 }
122
123 if (dims == 3 &&
124 lp_sampler_wrap_mode_uses_border_color(static_state->wrap_r,
125 static_state->min_img_filter,
126 static_state->mag_img_filter)) {
127 LLVMValueRef b1, b2;
128 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, z, int_coord_bld->zero);
129 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, z, depth);
130 if (use_border) {
131 use_border = LLVMBuildOr(builder, use_border, b1, "ub_or_b1");
132 use_border = LLVMBuildOr(builder, use_border, b2, "ub_or_b2");
133 }
134 else {
135 use_border = LLVMBuildOr(builder, b1, b2, "b1_or_b2");
136 }
137 }
138
139 /* convert x,y,z coords to linear offset from start of texture, in bytes */
140 lp_build_sample_offset(&bld->int_coord_bld,
141 bld->format_desc,
142 x, y, z, y_stride, z_stride,
143 &offset, &i, &j);
144 if (mipoffsets) {
145 offset = lp_build_add(&bld->int_coord_bld, offset, mipoffsets);
146 }
147
148 if (use_border) {
149 /* If we can sample the border color, it means that texcoords may
150 * lie outside the bounds of the texture image. We need to do
151 * something to prevent reading out of bounds and causing a segfault.
152 *
153 * Simply AND the texture coords with !use_border. This will cause
154 * coords which are out of bounds to become zero. Zero's guaranteed
155 * to be inside the texture image.
156 */
157 offset = lp_build_andnot(&bld->int_coord_bld, offset, use_border);
158 }
159
160 lp_build_fetch_rgba_soa(bld->gallivm,
161 bld->format_desc,
162 bld->texel_type,
163 data_ptr, offset,
164 i, j,
165 texel_out);
166
167 /*
168 * Note: if we find an app which frequently samples the texture border
169 * we might want to implement a true conditional here to avoid sampling
170 * the texture whenever possible (since that's quite a bit of code).
171 * Ex:
172 * if (use_border) {
173 * texel = border_color;
174 * }
175 * else {
176 * texel = sample_texture(coord);
177 * }
178 * As it is now, we always sample the texture, then selectively replace
179 * the texel color results with the border color.
180 */
181
182 if (use_border) {
183 /* select texel color or border color depending on use_border. */
184 const struct util_format_description *format_desc = bld->format_desc;
185 int chan;
186 struct lp_type border_type = bld->texel_type;
187 border_type.length = 4;
188 /*
189 * Only replace channels which are actually present. The others should
190 * get optimized away eventually by sampler_view swizzle anyway but it's
191 * easier too.
192 */
193 for (chan = 0; chan < 4; chan++) {
194 unsigned chan_s;
195 /* reverse-map channel... */
196 for (chan_s = 0; chan_s < 4; chan_s++) {
197 if (chan_s == format_desc->swizzle[chan]) {
198 break;
199 }
200 }
201 if (chan_s <= 3) {
202 /* use the already clamped color */
203 LLVMValueRef idx = lp_build_const_int32(bld->gallivm, chan);
204 LLVMValueRef border_chan;
205
206 border_chan = lp_build_extract_broadcast(bld->gallivm,
207 border_type,
208 bld->texel_type,
209 bld->border_color_clamped,
210 idx);
211 texel_out[chan] = lp_build_select(&bld->texel_bld, use_border,
212 border_chan, texel_out[chan]);
213 }
214 }
215 }
216 }
217
218
219 /**
220 * Helper to compute the mirror function for the PIPE_WRAP_MIRROR modes.
221 */
222 static LLVMValueRef
223 lp_build_coord_mirror(struct lp_build_sample_context *bld,
224 LLVMValueRef coord)
225 {
226 struct lp_build_context *coord_bld = &bld->coord_bld;
227 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
228 LLVMValueRef fract, flr, isOdd;
229
230 lp_build_ifloor_fract(coord_bld, coord, &flr, &fract);
231
232 /* isOdd = flr & 1 */
233 isOdd = LLVMBuildAnd(bld->gallivm->builder, flr, int_coord_bld->one, "");
234
235 /* make coord positive or negative depending on isOdd */
236 coord = lp_build_set_sign(coord_bld, fract, isOdd);
237
238 /* convert isOdd to float */
239 isOdd = lp_build_int_to_float(coord_bld, isOdd);
240
241 /* add isOdd to coord */
242 coord = lp_build_add(coord_bld, coord, isOdd);
243
244 return coord;
245 }
246
247
248 /**
249 * Helper to compute the first coord and the weight for
250 * linear wrap repeat npot textures
251 */
252 void
253 lp_build_coord_repeat_npot_linear(struct lp_build_sample_context *bld,
254 LLVMValueRef coord_f,
255 LLVMValueRef length_i,
256 LLVMValueRef length_f,
257 LLVMValueRef *coord0_i,
258 LLVMValueRef *weight_f)
259 {
260 struct lp_build_context *coord_bld = &bld->coord_bld;
261 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
262 LLVMValueRef half = lp_build_const_vec(bld->gallivm, coord_bld->type, 0.5);
263 LLVMValueRef length_minus_one = lp_build_sub(int_coord_bld, length_i,
264 int_coord_bld->one);
265 LLVMValueRef mask;
266 /* wrap with normalized floats is just fract */
267 coord_f = lp_build_fract(coord_bld, coord_f);
268 /* mul by size and subtract 0.5 */
269 coord_f = lp_build_mul(coord_bld, coord_f, length_f);
270 coord_f = lp_build_sub(coord_bld, coord_f, half);
271 /*
272 * we avoided the 0.5/length division before the repeat wrap,
273 * now need to fix up edge cases with selects
274 */
275 /* convert to int, compute lerp weight */
276 lp_build_ifloor_fract(coord_bld, coord_f, coord0_i, weight_f);
277 mask = lp_build_compare(int_coord_bld->gallivm, int_coord_bld->type,
278 PIPE_FUNC_LESS, *coord0_i, int_coord_bld->zero);
279 *coord0_i = lp_build_select(int_coord_bld, mask, length_minus_one, *coord0_i);
280 }
281
282
283 /**
284 * Build LLVM code for texture wrap mode for linear filtering.
285 * \param x0_out returns first integer texcoord
286 * \param x1_out returns second integer texcoord
287 * \param weight_out returns linear interpolation weight
288 */
289 static void
290 lp_build_sample_wrap_linear(struct lp_build_sample_context *bld,
291 LLVMValueRef coord,
292 LLVMValueRef length,
293 LLVMValueRef length_f,
294 LLVMValueRef offset,
295 boolean is_pot,
296 unsigned wrap_mode,
297 LLVMValueRef *x0_out,
298 LLVMValueRef *x1_out,
299 LLVMValueRef *weight_out)
300 {
301 struct lp_build_context *coord_bld = &bld->coord_bld;
302 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
303 LLVMBuilderRef builder = bld->gallivm->builder;
304 LLVMValueRef half = lp_build_const_vec(bld->gallivm, coord_bld->type, 0.5);
305 LLVMValueRef length_minus_one = lp_build_sub(int_coord_bld, length, int_coord_bld->one);
306 LLVMValueRef coord0, coord1, weight;
307
308 switch(wrap_mode) {
309 case PIPE_TEX_WRAP_REPEAT:
310 if (is_pot) {
311 /* mul by size and subtract 0.5 */
312 coord = lp_build_mul(coord_bld, coord, length_f);
313 coord = lp_build_sub(coord_bld, coord, half);
314 if (offset) {
315 offset = lp_build_int_to_float(coord_bld, offset);
316 coord = lp_build_add(coord_bld, coord, offset);
317 }
318 /* convert to int, compute lerp weight */
319 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
320 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
321 /* repeat wrap */
322 coord0 = LLVMBuildAnd(builder, coord0, length_minus_one, "");
323 coord1 = LLVMBuildAnd(builder, coord1, length_minus_one, "");
324 }
325 else {
326 LLVMValueRef mask;
327 if (offset) {
328 offset = lp_build_int_to_float(coord_bld, offset);
329 offset = lp_build_div(coord_bld, offset, length_f);
330 coord = lp_build_add(coord_bld, coord, offset);
331 }
332 lp_build_coord_repeat_npot_linear(bld, coord,
333 length, length_f,
334 &coord0, &weight);
335 mask = lp_build_compare(int_coord_bld->gallivm, int_coord_bld->type,
336 PIPE_FUNC_NOTEQUAL, coord0, length_minus_one);
337 coord1 = LLVMBuildAnd(builder,
338 lp_build_add(int_coord_bld, coord0, int_coord_bld->one),
339 mask, "");
340 }
341 break;
342
343 case PIPE_TEX_WRAP_CLAMP:
344 if (bld->static_sampler_state->normalized_coords) {
345 /* scale coord to length */
346 coord = lp_build_mul(coord_bld, coord, length_f);
347 }
348 if (offset) {
349 offset = lp_build_int_to_float(coord_bld, offset);
350 coord = lp_build_add(coord_bld, coord, offset);
351 }
352
353 /* clamp to [0, length] */
354 coord = lp_build_clamp(coord_bld, coord, coord_bld->zero, length_f);
355
356 coord = lp_build_sub(coord_bld, coord, half);
357
358 /* convert to int, compute lerp weight */
359 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
360 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
361 break;
362
363 case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
364 {
365 struct lp_build_context abs_coord_bld = bld->coord_bld;
366 abs_coord_bld.type.sign = FALSE;
367
368 if (bld->static_sampler_state->normalized_coords) {
369 /* mul by tex size */
370 coord = lp_build_mul(coord_bld, coord, length_f);
371 }
372 if (offset) {
373 offset = lp_build_int_to_float(coord_bld, offset);
374 coord = lp_build_add(coord_bld, coord, offset);
375 }
376
377 /* clamp to length max */
378 coord = lp_build_min(coord_bld, coord, length_f);
379 /* subtract 0.5 */
380 coord = lp_build_sub(coord_bld, coord, half);
381 /* clamp to [0, length - 0.5] */
382 coord = lp_build_max(coord_bld, coord, coord_bld->zero);
383 /* convert to int, compute lerp weight */
384 lp_build_ifloor_fract(&abs_coord_bld, coord, &coord0, &weight);
385 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
386 /* coord1 = min(coord1, length-1) */
387 coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one);
388 break;
389 }
390
391 case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
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 if (offset) {
397 offset = lp_build_int_to_float(coord_bld, offset);
398 coord = lp_build_add(coord_bld, coord, offset);
399 }
400 /* was: clamp to [-0.5, length + 0.5], then sub 0.5 */
401 /* can skip clamp (though might not work for very large coord values */
402 coord = lp_build_sub(coord_bld, coord, half);
403 /* convert to int, compute lerp weight */
404 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
405 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
406 break;
407
408 case PIPE_TEX_WRAP_MIRROR_REPEAT:
409 /* compute mirror function */
410 coord = lp_build_coord_mirror(bld, coord);
411
412 /* scale coord to length */
413 coord = lp_build_mul(coord_bld, coord, length_f);
414 coord = lp_build_sub(coord_bld, coord, half);
415 if (offset) {
416 offset = lp_build_int_to_float(coord_bld, offset);
417 coord = lp_build_add(coord_bld, coord, offset);
418 }
419
420 /* convert to int, compute lerp weight */
421 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
422 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
423
424 /* coord0 = max(coord0, 0) */
425 coord0 = lp_build_max(int_coord_bld, coord0, int_coord_bld->zero);
426 /* coord1 = min(coord1, length-1) */
427 coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one);
428 break;
429
430 case PIPE_TEX_WRAP_MIRROR_CLAMP:
431 if (bld->static_sampler_state->normalized_coords) {
432 /* scale coord to length */
433 coord = lp_build_mul(coord_bld, coord, length_f);
434 }
435 if (offset) {
436 offset = lp_build_int_to_float(coord_bld, offset);
437 coord = lp_build_add(coord_bld, coord, offset);
438 }
439 coord = lp_build_abs(coord_bld, coord);
440
441 /* clamp to [0, length] */
442 coord = lp_build_min(coord_bld, coord, length_f);
443
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 break;
450
451 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
452 {
453 struct lp_build_context abs_coord_bld = bld->coord_bld;
454 abs_coord_bld.type.sign = FALSE;
455
456 if (bld->static_sampler_state->normalized_coords) {
457 /* scale coord to length */
458 coord = lp_build_mul(coord_bld, coord, length_f);
459 }
460 if (offset) {
461 offset = lp_build_int_to_float(coord_bld, offset);
462 coord = lp_build_add(coord_bld, coord, offset);
463 }
464 coord = lp_build_abs(coord_bld, coord);
465
466 /* clamp to length max */
467 coord = lp_build_min(coord_bld, coord, length_f);
468 /* subtract 0.5 */
469 coord = lp_build_sub(coord_bld, coord, half);
470 /* clamp to [0, length - 0.5] */
471 coord = lp_build_max(coord_bld, coord, coord_bld->zero);
472
473 /* convert to int, compute lerp weight */
474 lp_build_ifloor_fract(&abs_coord_bld, coord, &coord0, &weight);
475 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
476 /* coord1 = min(coord1, length-1) */
477 coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one);
478 }
479 break;
480
481 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
482 {
483 if (bld->static_sampler_state->normalized_coords) {
484 /* scale coord to length */
485 coord = lp_build_mul(coord_bld, coord, length_f);
486 }
487 if (offset) {
488 offset = lp_build_int_to_float(coord_bld, offset);
489 coord = lp_build_add(coord_bld, coord, offset);
490 }
491 coord = lp_build_abs(coord_bld, coord);
492
493 /* was: clamp to [-0.5, length + 0.5] then sub 0.5 */
494 /* skip clamp - always positive, and other side
495 only potentially matters for very large coords */
496 coord = lp_build_sub(coord_bld, coord, half);
497
498 /* convert to int, compute lerp weight */
499 lp_build_ifloor_fract(coord_bld, coord, &coord0, &weight);
500 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
501 }
502 break;
503
504 default:
505 assert(0);
506 coord0 = NULL;
507 coord1 = NULL;
508 weight = NULL;
509 }
510
511 *x0_out = coord0;
512 *x1_out = coord1;
513 *weight_out = weight;
514 }
515
516
517 /**
518 * Build LLVM code for texture wrap mode for nearest filtering.
519 * \param coord the incoming texcoord (nominally in [0,1])
520 * \param length the texture size along one dimension, as int vector
521 * \param length_f the texture size along one dimension, as float vector
522 * \param offset texel offset along one dimension (as int vector)
523 * \param is_pot if TRUE, length is a power of two
524 * \param wrap_mode one of PIPE_TEX_WRAP_x
525 */
526 static LLVMValueRef
527 lp_build_sample_wrap_nearest(struct lp_build_sample_context *bld,
528 LLVMValueRef coord,
529 LLVMValueRef length,
530 LLVMValueRef length_f,
531 LLVMValueRef offset,
532 boolean is_pot,
533 unsigned wrap_mode)
534 {
535 struct lp_build_context *coord_bld = &bld->coord_bld;
536 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
537 LLVMBuilderRef builder = bld->gallivm->builder;
538 LLVMValueRef length_minus_one = lp_build_sub(int_coord_bld, length, int_coord_bld->one);
539 LLVMValueRef icoord;
540
541 switch(wrap_mode) {
542 case PIPE_TEX_WRAP_REPEAT:
543 if (is_pot) {
544 coord = lp_build_mul(coord_bld, coord, length_f);
545 icoord = lp_build_ifloor(coord_bld, coord);
546 if (offset) {
547 icoord = lp_build_add(int_coord_bld, icoord, offset);
548 }
549 icoord = LLVMBuildAnd(builder, icoord, length_minus_one, "");
550 }
551 else {
552 if (offset) {
553 offset = lp_build_int_to_float(coord_bld, offset);
554 offset = lp_build_div(coord_bld, offset, length_f);
555 coord = lp_build_add(coord_bld, coord, offset);
556 }
557 /* take fraction, unnormalize */
558 coord = lp_build_fract_safe(coord_bld, coord);
559 coord = lp_build_mul(coord_bld, coord, length_f);
560 icoord = lp_build_itrunc(coord_bld, coord);
561 }
562 break;
563
564 case PIPE_TEX_WRAP_CLAMP:
565 case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
566 if (bld->static_sampler_state->normalized_coords) {
567 /* scale coord to length */
568 coord = lp_build_mul(coord_bld, coord, length_f);
569 }
570
571 /* floor */
572 /* use itrunc instead since we clamp to 0 anyway */
573 icoord = lp_build_itrunc(coord_bld, coord);
574 if (offset) {
575 icoord = lp_build_add(int_coord_bld, icoord, offset);
576 }
577
578 /* clamp to [0, length - 1]. */
579 icoord = lp_build_clamp(int_coord_bld, icoord, int_coord_bld->zero,
580 length_minus_one);
581 break;
582
583 case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
584 if (bld->static_sampler_state->normalized_coords) {
585 /* scale coord to length */
586 coord = lp_build_mul(coord_bld, coord, length_f);
587 }
588 /* no clamp necessary, border masking will handle this */
589 icoord = lp_build_ifloor(coord_bld, coord);
590 if (offset) {
591 icoord = lp_build_add(int_coord_bld, icoord, offset);
592 }
593 break;
594
595 case PIPE_TEX_WRAP_MIRROR_REPEAT:
596 if (offset) {
597 offset = lp_build_int_to_float(coord_bld, offset);
598 offset = lp_build_div(coord_bld, offset, length_f);
599 coord = lp_build_add(coord_bld, coord, offset);
600 }
601 /* compute mirror function */
602 coord = lp_build_coord_mirror(bld, coord);
603
604 /* scale coord to length */
605 assert(bld->static_sampler_state->normalized_coords);
606 coord = lp_build_mul(coord_bld, coord, length_f);
607
608 /* itrunc == ifloor here */
609 icoord = lp_build_itrunc(coord_bld, coord);
610
611 /* clamp to [0, length - 1] */
612 icoord = lp_build_min(int_coord_bld, icoord, length_minus_one);
613 break;
614
615 case PIPE_TEX_WRAP_MIRROR_CLAMP:
616 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
617 if (bld->static_sampler_state->normalized_coords) {
618 /* scale coord to length */
619 coord = lp_build_mul(coord_bld, coord, length_f);
620 }
621 if (offset) {
622 offset = lp_build_int_to_float(coord_bld, offset);
623 coord = lp_build_add(coord_bld, coord, offset);
624 }
625 coord = lp_build_abs(coord_bld, coord);
626
627 /* itrunc == ifloor here */
628 icoord = lp_build_itrunc(coord_bld, coord);
629
630 /* clamp to [0, length - 1] */
631 icoord = lp_build_min(int_coord_bld, icoord, length_minus_one);
632 break;
633
634 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
635 if (bld->static_sampler_state->normalized_coords) {
636 /* scale coord to length */
637 coord = lp_build_mul(coord_bld, coord, length_f);
638 }
639 if (offset) {
640 offset = lp_build_int_to_float(coord_bld, offset);
641 coord = lp_build_add(coord_bld, coord, offset);
642 }
643 coord = lp_build_abs(coord_bld, coord);
644
645 /* itrunc == ifloor here */
646 icoord = lp_build_itrunc(coord_bld, coord);
647 break;
648
649 default:
650 assert(0);
651 icoord = NULL;
652 }
653
654 return icoord;
655 }
656
657
658 /**
659 * Do shadow test/comparison.
660 * \param p shadow ref value
661 * \param texel the texel to compare against
662 */
663 static LLVMValueRef
664 lp_build_sample_comparefunc(struct lp_build_sample_context *bld,
665 LLVMValueRef p,
666 LLVMValueRef texel)
667 {
668 struct lp_build_context *texel_bld = &bld->texel_bld;
669 LLVMValueRef res;
670
671 if (0) {
672 //lp_build_print_value(bld->gallivm, "shadow cmp coord", p);
673 lp_build_print_value(bld->gallivm, "shadow cmp texel", texel);
674 }
675
676 /* result = (p FUNC texel) ? 1 : 0 */
677 /*
678 * honor d3d10 floating point rules here, which state that comparisons
679 * are ordered except NOT_EQUAL which is unordered.
680 */
681 if (bld->static_sampler_state->compare_func != PIPE_FUNC_NOTEQUAL) {
682 res = lp_build_cmp_ordered(texel_bld, bld->static_sampler_state->compare_func,
683 p, texel);
684 }
685 else {
686 res = lp_build_cmp(texel_bld, bld->static_sampler_state->compare_func,
687 p, texel);
688 }
689 return res;
690 }
691
692
693 /**
694 * Generate code to sample a mipmap level with nearest filtering.
695 * If sampling a cube texture, r = cube face in [0,5].
696 */
697 static void
698 lp_build_sample_image_nearest(struct lp_build_sample_context *bld,
699 unsigned sampler_unit,
700 LLVMValueRef size,
701 LLVMValueRef row_stride_vec,
702 LLVMValueRef img_stride_vec,
703 LLVMValueRef data_ptr,
704 LLVMValueRef mipoffsets,
705 LLVMValueRef *coords,
706 const LLVMValueRef *offsets,
707 LLVMValueRef colors_out[4])
708 {
709 const unsigned dims = bld->dims;
710 LLVMValueRef width_vec;
711 LLVMValueRef height_vec;
712 LLVMValueRef depth_vec;
713 LLVMValueRef flt_size;
714 LLVMValueRef flt_width_vec;
715 LLVMValueRef flt_height_vec;
716 LLVMValueRef flt_depth_vec;
717 LLVMValueRef x, y = NULL, z = NULL;
718
719 lp_build_extract_image_sizes(bld,
720 &bld->int_size_bld,
721 bld->int_coord_type,
722 size,
723 &width_vec, &height_vec, &depth_vec);
724
725 flt_size = lp_build_int_to_float(&bld->float_size_bld, size);
726
727 lp_build_extract_image_sizes(bld,
728 &bld->float_size_bld,
729 bld->coord_type,
730 flt_size,
731 &flt_width_vec, &flt_height_vec, &flt_depth_vec);
732
733 /*
734 * Compute integer texcoords.
735 */
736 x = lp_build_sample_wrap_nearest(bld, coords[0], width_vec,
737 flt_width_vec, offsets[0],
738 bld->static_texture_state->pot_width,
739 bld->static_sampler_state->wrap_s);
740 lp_build_name(x, "tex.x.wrapped");
741
742 if (dims >= 2) {
743 y = lp_build_sample_wrap_nearest(bld, coords[1], height_vec,
744 flt_height_vec, offsets[1],
745 bld->static_texture_state->pot_height,
746 bld->static_sampler_state->wrap_t);
747 lp_build_name(y, "tex.y.wrapped");
748
749 if (dims == 3) {
750 z = lp_build_sample_wrap_nearest(bld, coords[2], depth_vec,
751 flt_depth_vec, offsets[2],
752 bld->static_texture_state->pot_depth,
753 bld->static_sampler_state->wrap_r);
754 lp_build_name(z, "tex.z.wrapped");
755 }
756 }
757 if (bld->static_texture_state->target == PIPE_TEXTURE_CUBE ||
758 bld->static_texture_state->target == PIPE_TEXTURE_1D_ARRAY ||
759 bld->static_texture_state->target == PIPE_TEXTURE_2D_ARRAY) {
760 z = coords[2];
761 lp_build_name(z, "tex.z.layer");
762 }
763
764 /*
765 * Get texture colors.
766 */
767 lp_build_sample_texel_soa(bld, sampler_unit,
768 width_vec, height_vec, depth_vec,
769 x, y, z,
770 row_stride_vec, img_stride_vec,
771 data_ptr, mipoffsets, colors_out);
772
773 if (bld->static_sampler_state->compare_mode != PIPE_TEX_COMPARE_NONE) {
774 LLVMValueRef cmpval;
775 cmpval = lp_build_sample_comparefunc(bld, coords[4], colors_out[0]);
776 /* this is really just a AND 1.0, cmpval but llvm is clever enough */
777 colors_out[0] = lp_build_select(&bld->texel_bld, cmpval,
778 bld->texel_bld.one, bld->texel_bld.zero);
779 colors_out[1] = colors_out[2] = colors_out[3] = colors_out[0];
780 }
781
782 }
783
784
785 /**
786 * Like a lerp, but inputs are 0/~0 masks, so can simplify slightly.
787 */
788 static LLVMValueRef
789 lp_build_masklerp(struct lp_build_context *bld,
790 LLVMValueRef weight,
791 LLVMValueRef mask0,
792 LLVMValueRef mask1)
793 {
794 struct gallivm_state *gallivm = bld->gallivm;
795 LLVMBuilderRef builder = gallivm->builder;
796 LLVMValueRef weight2;
797
798 weight2 = lp_build_sub(bld, bld->one, weight);
799 weight = LLVMBuildBitCast(builder, weight,
800 lp_build_int_vec_type(gallivm, bld->type), "");
801 weight2 = LLVMBuildBitCast(builder, weight2,
802 lp_build_int_vec_type(gallivm, bld->type), "");
803 weight = LLVMBuildAnd(builder, weight, mask1, "");
804 weight2 = LLVMBuildAnd(builder, weight2, mask0, "");
805 weight = LLVMBuildBitCast(builder, weight, bld->vec_type, "");
806 weight2 = LLVMBuildBitCast(builder, weight2, bld->vec_type, "");
807 return lp_build_add(bld, weight, weight2);
808 }
809
810 /**
811 * Like a 2d lerp, but inputs are 0/~0 masks, so can simplify slightly.
812 */
813 static LLVMValueRef
814 lp_build_masklerp2d(struct lp_build_context *bld,
815 LLVMValueRef weight0,
816 LLVMValueRef weight1,
817 LLVMValueRef mask00,
818 LLVMValueRef mask01,
819 LLVMValueRef mask10,
820 LLVMValueRef mask11)
821 {
822 LLVMValueRef val0 = lp_build_masklerp(bld, weight0, mask00, mask01);
823 LLVMValueRef val1 = lp_build_masklerp(bld, weight0, mask10, mask11);
824 return lp_build_lerp(bld, weight1, val0, val1, 0);
825 }
826
827 /**
828 * Generate code to sample a mipmap level with linear filtering.
829 * If sampling a cube texture, r = cube face in [0,5].
830 */
831 static void
832 lp_build_sample_image_linear(struct lp_build_sample_context *bld,
833 unsigned sampler_unit,
834 LLVMValueRef size,
835 LLVMValueRef row_stride_vec,
836 LLVMValueRef img_stride_vec,
837 LLVMValueRef data_ptr,
838 LLVMValueRef mipoffsets,
839 LLVMValueRef *coords,
840 const LLVMValueRef *offsets,
841 LLVMValueRef colors_out[4])
842 {
843 const unsigned dims = bld->dims;
844 LLVMValueRef width_vec;
845 LLVMValueRef height_vec;
846 LLVMValueRef depth_vec;
847 LLVMValueRef flt_size;
848 LLVMValueRef flt_width_vec;
849 LLVMValueRef flt_height_vec;
850 LLVMValueRef flt_depth_vec;
851 LLVMValueRef x0, y0 = NULL, z0 = NULL, x1, y1 = NULL, z1 = NULL;
852 LLVMValueRef s_fpart, t_fpart = NULL, r_fpart = NULL;
853 LLVMValueRef neighbors[2][2][4];
854 int chan;
855
856 lp_build_extract_image_sizes(bld,
857 &bld->int_size_bld,
858 bld->int_coord_type,
859 size,
860 &width_vec, &height_vec, &depth_vec);
861
862 flt_size = lp_build_int_to_float(&bld->float_size_bld, size);
863
864 lp_build_extract_image_sizes(bld,
865 &bld->float_size_bld,
866 bld->coord_type,
867 flt_size,
868 &flt_width_vec, &flt_height_vec, &flt_depth_vec);
869
870 /*
871 * Compute integer texcoords.
872 */
873 lp_build_sample_wrap_linear(bld, coords[0], width_vec,
874 flt_width_vec, offsets[0],
875 bld->static_texture_state->pot_width,
876 bld->static_sampler_state->wrap_s,
877 &x0, &x1, &s_fpart);
878 lp_build_name(x0, "tex.x0.wrapped");
879 lp_build_name(x1, "tex.x1.wrapped");
880
881 if (dims >= 2) {
882 lp_build_sample_wrap_linear(bld, coords[1], height_vec,
883 flt_height_vec, offsets[1],
884 bld->static_texture_state->pot_height,
885 bld->static_sampler_state->wrap_t,
886 &y0, &y1, &t_fpart);
887 lp_build_name(y0, "tex.y0.wrapped");
888 lp_build_name(y1, "tex.y1.wrapped");
889
890 if (dims == 3) {
891 lp_build_sample_wrap_linear(bld, coords[2], depth_vec,
892 flt_depth_vec, offsets[2],
893 bld->static_texture_state->pot_depth,
894 bld->static_sampler_state->wrap_r,
895 &z0, &z1, &r_fpart);
896 lp_build_name(z0, "tex.z0.wrapped");
897 lp_build_name(z1, "tex.z1.wrapped");
898 }
899 }
900 if (bld->static_texture_state->target == PIPE_TEXTURE_CUBE ||
901 bld->static_texture_state->target == PIPE_TEXTURE_1D_ARRAY ||
902 bld->static_texture_state->target == PIPE_TEXTURE_2D_ARRAY) {
903 z0 = z1 = coords[2]; /* cube face or layer */
904 lp_build_name(z0, "tex.z0.layer");
905 lp_build_name(z1, "tex.z1.layer");
906 }
907
908
909 /*
910 * Get texture colors.
911 */
912 /* get x0/x1 texels */
913 lp_build_sample_texel_soa(bld, sampler_unit,
914 width_vec, height_vec, depth_vec,
915 x0, y0, z0,
916 row_stride_vec, img_stride_vec,
917 data_ptr, mipoffsets, neighbors[0][0]);
918 lp_build_sample_texel_soa(bld, sampler_unit,
919 width_vec, height_vec, depth_vec,
920 x1, y0, z0,
921 row_stride_vec, img_stride_vec,
922 data_ptr, mipoffsets, neighbors[0][1]);
923
924 if (dims == 1) {
925 if (bld->static_sampler_state->compare_mode == PIPE_TEX_COMPARE_NONE) {
926 /* Interpolate two samples from 1D image to produce one color */
927 for (chan = 0; chan < 4; chan++) {
928 colors_out[chan] = lp_build_lerp(&bld->texel_bld, s_fpart,
929 neighbors[0][0][chan],
930 neighbors[0][1][chan],
931 0);
932 }
933 }
934 else {
935 LLVMValueRef cmpval0, cmpval1;
936 cmpval0 = lp_build_sample_comparefunc(bld, coords[4], neighbors[0][0][0]);
937 cmpval1 = lp_build_sample_comparefunc(bld, coords[4], neighbors[0][1][0]);
938 /* simplified lerp, AND mask with weight and add */
939 colors_out[0] = lp_build_masklerp(&bld->texel_bld, s_fpart,
940 cmpval0, cmpval1);
941 colors_out[1] = colors_out[2] = colors_out[3] = colors_out[0];
942 }
943 }
944 else {
945 /* 2D/3D texture */
946 LLVMValueRef colors0[4];
947
948 /* get x0/x1 texels at y1 */
949 lp_build_sample_texel_soa(bld, sampler_unit,
950 width_vec, height_vec, depth_vec,
951 x0, y1, z0,
952 row_stride_vec, img_stride_vec,
953 data_ptr, mipoffsets, neighbors[1][0]);
954 lp_build_sample_texel_soa(bld, sampler_unit,
955 width_vec, height_vec, depth_vec,
956 x1, y1, z0,
957 row_stride_vec, img_stride_vec,
958 data_ptr, mipoffsets, neighbors[1][1]);
959
960 if (bld->static_sampler_state->compare_mode == PIPE_TEX_COMPARE_NONE) {
961 /* Bilinear interpolate the four samples from the 2D image / 3D slice */
962 for (chan = 0; chan < 4; chan++) {
963 colors0[chan] = lp_build_lerp_2d(&bld->texel_bld,
964 s_fpart, t_fpart,
965 neighbors[0][0][chan],
966 neighbors[0][1][chan],
967 neighbors[1][0][chan],
968 neighbors[1][1][chan],
969 0);
970 }
971 }
972 else {
973 LLVMValueRef cmpval00, cmpval01, cmpval10, cmpval11;
974 cmpval00 = lp_build_sample_comparefunc(bld, coords[4], neighbors[0][0][0]);
975 cmpval01 = lp_build_sample_comparefunc(bld, coords[4], neighbors[0][1][0]);
976 cmpval10 = lp_build_sample_comparefunc(bld, coords[4], neighbors[1][0][0]);
977 cmpval11 = lp_build_sample_comparefunc(bld, coords[4], neighbors[1][1][0]);
978 colors0[0] = lp_build_masklerp2d(&bld->texel_bld, s_fpart, t_fpart,
979 cmpval00, cmpval01, cmpval10, cmpval11);
980 colors0[1] = colors0[2] = colors0[3] = colors0[0];
981 }
982
983 if (dims == 3) {
984 LLVMValueRef neighbors1[2][2][4];
985 LLVMValueRef colors1[4];
986
987 /* get x0/x1/y0/y1 texels at z1 */
988 lp_build_sample_texel_soa(bld, sampler_unit,
989 width_vec, height_vec, depth_vec,
990 x0, y0, z1,
991 row_stride_vec, img_stride_vec,
992 data_ptr, mipoffsets, neighbors1[0][0]);
993 lp_build_sample_texel_soa(bld, sampler_unit,
994 width_vec, height_vec, depth_vec,
995 x1, y0, z1,
996 row_stride_vec, img_stride_vec,
997 data_ptr, mipoffsets, neighbors1[0][1]);
998 lp_build_sample_texel_soa(bld, sampler_unit,
999 width_vec, height_vec, depth_vec,
1000 x0, y1, z1,
1001 row_stride_vec, img_stride_vec,
1002 data_ptr, mipoffsets, neighbors1[1][0]);
1003 lp_build_sample_texel_soa(bld, sampler_unit,
1004 width_vec, height_vec, depth_vec,
1005 x1, y1, z1,
1006 row_stride_vec, img_stride_vec,
1007 data_ptr, mipoffsets, neighbors1[1][1]);
1008
1009 if (bld->static_sampler_state->compare_mode == PIPE_TEX_COMPARE_NONE) {
1010 /* Bilinear interpolate the four samples from the second Z slice */
1011 for (chan = 0; chan < 4; chan++) {
1012 colors1[chan] = lp_build_lerp_2d(&bld->texel_bld,
1013 s_fpart, t_fpart,
1014 neighbors1[0][0][chan],
1015 neighbors1[0][1][chan],
1016 neighbors1[1][0][chan],
1017 neighbors1[1][1][chan],
1018 0);
1019 }
1020 /* Linearly interpolate the two samples from the two 3D slices */
1021 for (chan = 0; chan < 4; chan++) {
1022 colors_out[chan] = lp_build_lerp(&bld->texel_bld,
1023 r_fpart,
1024 colors0[chan], colors1[chan],
1025 0);
1026 }
1027 }
1028 else {
1029 LLVMValueRef cmpval00, cmpval01, cmpval10, cmpval11;
1030 cmpval00 = lp_build_sample_comparefunc(bld, coords[4], neighbors[0][0][0]);
1031 cmpval01 = lp_build_sample_comparefunc(bld, coords[4], neighbors[0][1][0]);
1032 cmpval10 = lp_build_sample_comparefunc(bld, coords[4], neighbors[1][0][0]);
1033 cmpval11 = lp_build_sample_comparefunc(bld, coords[4], neighbors[1][1][0]);
1034 colors1[0] = lp_build_masklerp2d(&bld->texel_bld, s_fpart, t_fpart,
1035 cmpval00, cmpval01, cmpval10, cmpval11);
1036 /* Linearly interpolate the two samples from the two 3D slices */
1037 colors_out[0] = lp_build_lerp(&bld->texel_bld,
1038 r_fpart,
1039 colors0[0], colors1[0],
1040 0);
1041 colors_out[1] = colors_out[2] = colors_out[3] = colors_out[0];
1042 }
1043 }
1044 else {
1045 /* 2D tex */
1046 for (chan = 0; chan < 4; chan++) {
1047 colors_out[chan] = colors0[chan];
1048 }
1049 }
1050 }
1051 }
1052
1053
1054 /**
1055 * Sample the texture/mipmap using given image filter and mip filter.
1056 * data0_ptr and data1_ptr point to the two mipmap levels to sample
1057 * from. width0/1_vec, height0/1_vec, depth0/1_vec indicate their sizes.
1058 * If we're using nearest miplevel sampling the '1' values will be null/unused.
1059 */
1060 static void
1061 lp_build_sample_mipmap(struct lp_build_sample_context *bld,
1062 unsigned sampler_unit,
1063 unsigned img_filter,
1064 unsigned mip_filter,
1065 LLVMValueRef *coords,
1066 const LLVMValueRef *offsets,
1067 LLVMValueRef ilevel0,
1068 LLVMValueRef ilevel1,
1069 LLVMValueRef lod_fpart,
1070 LLVMValueRef *colors_out)
1071 {
1072 LLVMBuilderRef builder = bld->gallivm->builder;
1073 LLVMValueRef size0 = NULL;
1074 LLVMValueRef size1 = NULL;
1075 LLVMValueRef row_stride0_vec = NULL;
1076 LLVMValueRef row_stride1_vec = NULL;
1077 LLVMValueRef img_stride0_vec = NULL;
1078 LLVMValueRef img_stride1_vec = NULL;
1079 LLVMValueRef data_ptr0 = NULL;
1080 LLVMValueRef data_ptr1 = NULL;
1081 LLVMValueRef mipoff0 = NULL;
1082 LLVMValueRef mipoff1 = NULL;
1083 LLVMValueRef colors0[4], colors1[4];
1084 unsigned chan;
1085
1086 /* sample the first mipmap level */
1087 lp_build_mipmap_level_sizes(bld, ilevel0,
1088 &size0,
1089 &row_stride0_vec, &img_stride0_vec);
1090 if (bld->num_lods == 1) {
1091 data_ptr0 = lp_build_get_mipmap_level(bld, ilevel0);
1092 }
1093 else {
1094 /* This path should work for num_lods 1 too but slightly less efficient */
1095 data_ptr0 = bld->base_ptr;
1096 mipoff0 = lp_build_get_mip_offsets(bld, ilevel0);
1097 }
1098 if (img_filter == PIPE_TEX_FILTER_NEAREST) {
1099 lp_build_sample_image_nearest(bld, sampler_unit,
1100 size0,
1101 row_stride0_vec, img_stride0_vec,
1102 data_ptr0, mipoff0, coords, offsets,
1103 colors0);
1104 }
1105 else {
1106 assert(img_filter == PIPE_TEX_FILTER_LINEAR);
1107 lp_build_sample_image_linear(bld, sampler_unit,
1108 size0,
1109 row_stride0_vec, img_stride0_vec,
1110 data_ptr0, mipoff0, coords, offsets,
1111 colors0);
1112 }
1113
1114 /* Store the first level's colors in the output variables */
1115 for (chan = 0; chan < 4; chan++) {
1116 LLVMBuildStore(builder, colors0[chan], colors_out[chan]);
1117 }
1118
1119 if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
1120 struct lp_build_if_state if_ctx;
1121 LLVMValueRef need_lerp;
1122
1123 /* need_lerp = lod_fpart > 0 */
1124 if (bld->num_lods == 1) {
1125 need_lerp = LLVMBuildFCmp(builder, LLVMRealUGT,
1126 lod_fpart, bld->levelf_bld.zero,
1127 "need_lerp");
1128 }
1129 else {
1130 /*
1131 * We'll do mip filtering if any of the quads (or individual
1132 * pixel in case of per-pixel lod) need it.
1133 * It might be better to split the vectors here and only fetch/filter
1134 * quads which need it.
1135 */
1136 /*
1137 * We unfortunately need to clamp lod_fpart here since we can get
1138 * negative values which would screw up filtering if not all
1139 * lod_fpart values have same sign.
1140 */
1141 lod_fpart = lp_build_max(&bld->levelf_bld, lod_fpart,
1142 bld->levelf_bld.zero);
1143 need_lerp = lp_build_compare(bld->gallivm, bld->levelf_bld.type,
1144 PIPE_FUNC_GREATER,
1145 lod_fpart, bld->levelf_bld.zero);
1146 need_lerp = lp_build_any_true_range(&bld->leveli_bld, bld->num_lods, need_lerp);
1147 }
1148
1149 lp_build_if(&if_ctx, bld->gallivm, need_lerp);
1150 {
1151 /* sample the second mipmap level */
1152 lp_build_mipmap_level_sizes(bld, ilevel1,
1153 &size1,
1154 &row_stride1_vec, &img_stride1_vec);
1155 if (bld->num_lods == 1) {
1156 data_ptr1 = lp_build_get_mipmap_level(bld, ilevel1);
1157 }
1158 else {
1159 data_ptr1 = bld->base_ptr;
1160 mipoff1 = lp_build_get_mip_offsets(bld, ilevel1);
1161 }
1162 if (img_filter == PIPE_TEX_FILTER_NEAREST) {
1163 lp_build_sample_image_nearest(bld, sampler_unit,
1164 size1,
1165 row_stride1_vec, img_stride1_vec,
1166 data_ptr1, mipoff1, coords, offsets,
1167 colors1);
1168 }
1169 else {
1170 lp_build_sample_image_linear(bld, sampler_unit,
1171 size1,
1172 row_stride1_vec, img_stride1_vec,
1173 data_ptr1, mipoff1, coords, offsets,
1174 colors1);
1175 }
1176
1177 /* interpolate samples from the two mipmap levels */
1178
1179 if (bld->num_lods != bld->coord_type.length)
1180 lod_fpart = lp_build_unpack_broadcast_aos_scalars(bld->gallivm,
1181 bld->levelf_bld.type,
1182 bld->texel_bld.type,
1183 lod_fpart);
1184
1185 for (chan = 0; chan < 4; chan++) {
1186 colors0[chan] = lp_build_lerp(&bld->texel_bld, lod_fpart,
1187 colors0[chan], colors1[chan],
1188 0);
1189 LLVMBuildStore(builder, colors0[chan], colors_out[chan]);
1190 }
1191 }
1192 lp_build_endif(&if_ctx);
1193 }
1194 }
1195
1196
1197 /**
1198 * Build (per-coord) layer value.
1199 * Either clamp layer to valid values or fill in optional out_of_bounds
1200 * value and just return value unclamped.
1201 */
1202 static LLVMValueRef
1203 lp_build_layer_coord(struct lp_build_sample_context *bld,
1204 unsigned texture_unit,
1205 LLVMValueRef layer,
1206 LLVMValueRef *out_of_bounds)
1207 {
1208 LLVMValueRef num_layers;
1209 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
1210
1211 num_layers = bld->dynamic_state->depth(bld->dynamic_state,
1212 bld->gallivm, texture_unit);
1213
1214 if (out_of_bounds) {
1215 LLVMValueRef out1, out;
1216 num_layers = lp_build_broadcast_scalar(int_coord_bld, num_layers);
1217 out = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, layer, int_coord_bld->zero);
1218 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, layer, num_layers);
1219 *out_of_bounds = lp_build_or(int_coord_bld, out, out1);
1220 return layer;
1221 }
1222 else {
1223 LLVMValueRef maxlayer;
1224 maxlayer = lp_build_sub(&bld->int_bld, num_layers, bld->int_bld.one);
1225 maxlayer = lp_build_broadcast_scalar(int_coord_bld, maxlayer);
1226 return lp_build_clamp(int_coord_bld, layer, int_coord_bld->zero, maxlayer);
1227 }
1228 }
1229
1230
1231 /**
1232 * Calculate cube face, lod, mip levels.
1233 */
1234 static void
1235 lp_build_sample_common(struct lp_build_sample_context *bld,
1236 unsigned texture_index,
1237 unsigned sampler_index,
1238 LLVMValueRef *coords,
1239 const struct lp_derivatives *derivs, /* optional */
1240 LLVMValueRef lod_bias, /* optional */
1241 LLVMValueRef explicit_lod, /* optional */
1242 LLVMValueRef *lod_ipart,
1243 LLVMValueRef *lod_fpart,
1244 LLVMValueRef *ilevel0,
1245 LLVMValueRef *ilevel1)
1246 {
1247 const unsigned mip_filter = bld->static_sampler_state->min_mip_filter;
1248 const unsigned min_filter = bld->static_sampler_state->min_img_filter;
1249 const unsigned mag_filter = bld->static_sampler_state->mag_img_filter;
1250 const unsigned target = bld->static_texture_state->target;
1251 LLVMValueRef first_level, cube_rho = NULL;
1252
1253 /*
1254 printf("%s mip %d min %d mag %d\n", __FUNCTION__,
1255 mip_filter, min_filter, mag_filter);
1256 */
1257
1258 /*
1259 * Choose cube face, recompute texcoords for the chosen face and
1260 * compute rho here too (as it requires transform of derivatives).
1261 */
1262 if (target == PIPE_TEXTURE_CUBE) {
1263 boolean need_derivs;
1264 need_derivs = ((min_filter != mag_filter ||
1265 mip_filter != PIPE_TEX_MIPFILTER_NONE) &&
1266 !bld->static_sampler_state->min_max_lod_equal &&
1267 !explicit_lod);
1268 lp_build_cube_lookup(bld, coords, derivs, &cube_rho, need_derivs);
1269 }
1270 else if (target == PIPE_TEXTURE_1D_ARRAY ||
1271 target == PIPE_TEXTURE_2D_ARRAY) {
1272 coords[2] = lp_build_iround(&bld->coord_bld, coords[2]);
1273 coords[2] = lp_build_layer_coord(bld, texture_index, coords[2], NULL);
1274 }
1275
1276 if (bld->static_sampler_state->compare_mode != PIPE_TEX_COMPARE_NONE) {
1277 /*
1278 * Clamp p coords to [0,1] for fixed function depth texture format here.
1279 * Technically this is not entirely correct for unorm depth as the ref value
1280 * should be converted to the depth format (quantization!) and comparison
1281 * then done in texture format. This would actually help performance (since
1282 * only need to do it once and could save the per-sample conversion of texels
1283 * to floats instead), but it would need more messy code (would need to push
1284 * at least some bits down to actual fetch so conversion could be skipped,
1285 * and would have ugly interaction with border color, would need to convert
1286 * border color to that format too or do some other tricks to make it work).
1287 */
1288 const struct util_format_description *format_desc = bld->format_desc;
1289 unsigned chan_type;
1290 /* not entirely sure we couldn't end up with non-valid swizzle here */
1291 chan_type = format_desc->swizzle[0] <= UTIL_FORMAT_SWIZZLE_W ?
1292 format_desc->channel[format_desc->swizzle[0]].type :
1293 UTIL_FORMAT_TYPE_FLOAT;
1294 if (chan_type != UTIL_FORMAT_TYPE_FLOAT) {
1295 coords[4] = lp_build_clamp(&bld->coord_bld, coords[4],
1296 bld->coord_bld.zero, bld->coord_bld.one);
1297 }
1298 }
1299
1300 /*
1301 * Compute the level of detail (float).
1302 */
1303 if (min_filter != mag_filter ||
1304 mip_filter != PIPE_TEX_MIPFILTER_NONE) {
1305 /* Need to compute lod either to choose mipmap levels or to
1306 * distinguish between minification/magnification with one mipmap level.
1307 */
1308 lp_build_lod_selector(bld, texture_index, sampler_index,
1309 coords[0], coords[1], coords[2], cube_rho,
1310 derivs, lod_bias, explicit_lod,
1311 mip_filter,
1312 lod_ipart, lod_fpart);
1313 } else {
1314 *lod_ipart = bld->leveli_bld.zero;
1315 }
1316
1317 /*
1318 * Compute integer mipmap level(s) to fetch texels from: ilevel0, ilevel1
1319 */
1320 switch (mip_filter) {
1321 default:
1322 assert(0 && "bad mip_filter value in lp_build_sample_soa()");
1323 /* fall-through */
1324 case PIPE_TEX_MIPFILTER_NONE:
1325 /* always use mip level 0 */
1326 if (HAVE_LLVM == 0x0207 && target == PIPE_TEXTURE_CUBE) {
1327 /* XXX this is a work-around for an apparent bug in LLVM 2.7.
1328 * We should be able to set ilevel0 = const(0) but that causes
1329 * bad x86 code to be emitted.
1330 */
1331 assert(*lod_ipart);
1332 lp_build_nearest_mip_level(bld, texture_index, *lod_ipart, ilevel0, NULL);
1333 }
1334 else {
1335 first_level = bld->dynamic_state->first_level(bld->dynamic_state,
1336 bld->gallivm, texture_index);
1337 first_level = lp_build_broadcast_scalar(&bld->leveli_bld, first_level);
1338 *ilevel0 = first_level;
1339 }
1340 break;
1341 case PIPE_TEX_MIPFILTER_NEAREST:
1342 assert(*lod_ipart);
1343 lp_build_nearest_mip_level(bld, texture_index, *lod_ipart, ilevel0, NULL);
1344 break;
1345 case PIPE_TEX_MIPFILTER_LINEAR:
1346 assert(*lod_ipart);
1347 assert(*lod_fpart);
1348 lp_build_linear_mip_levels(bld, texture_index,
1349 *lod_ipart, lod_fpart,
1350 ilevel0, ilevel1);
1351 break;
1352 }
1353 }
1354
1355 static void
1356 lp_build_clamp_border_color(struct lp_build_sample_context *bld,
1357 unsigned sampler_unit)
1358 {
1359 struct gallivm_state *gallivm = bld->gallivm;
1360 LLVMBuilderRef builder = gallivm->builder;
1361 LLVMValueRef border_color_ptr =
1362 bld->dynamic_state->border_color(bld->dynamic_state,
1363 gallivm, sampler_unit);
1364 LLVMValueRef border_color;
1365 const struct util_format_description *format_desc = bld->format_desc;
1366 struct lp_type vec4_type = bld->texel_type;
1367 struct lp_build_context vec4_bld;
1368 LLVMValueRef min_clamp = NULL;
1369 LLVMValueRef max_clamp = NULL;
1370
1371 /*
1372 * For normalized format need to clamp border color (technically
1373 * probably should also quantize the data). Really sucks doing this
1374 * here but can't avoid at least for now since this is part of
1375 * sampler state and texture format is part of sampler_view state.
1376 * GL expects also expects clamping for uint/sint formats too so
1377 * do that as well (d3d10 can't end up here with uint/sint since it
1378 * only supports them with ld).
1379 */
1380 vec4_type.length = 4;
1381 lp_build_context_init(&vec4_bld, gallivm, vec4_type);
1382
1383 /*
1384 * Vectorized clamping of border color. Loading is a bit of a hack since
1385 * we just cast the pointer to float array to pointer to vec4
1386 * (int or float).
1387 */
1388 border_color_ptr = lp_build_array_get_ptr(gallivm, border_color_ptr,
1389 lp_build_const_int32(gallivm, 0));
1390 border_color_ptr = LLVMBuildBitCast(builder, border_color_ptr,
1391 LLVMPointerType(vec4_bld.vec_type, 0), "");
1392 border_color = LLVMBuildLoad(builder, border_color_ptr, "");
1393 /* we don't have aligned type in the dynamic state unfortunately */
1394 lp_set_load_alignment(border_color, 4);
1395
1396 /*
1397 * Instead of having some incredibly complex logic which will try to figure out
1398 * clamping necessary for each channel, simply use the first channel, and treat
1399 * mixed signed/unsigned normalized formats specially.
1400 * (Mixed non-normalized, which wouldn't work at all here, do not exist for a
1401 * good reason.)
1402 */
1403 if (format_desc->layout == UTIL_FORMAT_LAYOUT_PLAIN) {
1404 int chan;
1405 /* d/s needs special handling because both present means just sampling depth */
1406 if (util_format_is_depth_and_stencil(format_desc->format)) {
1407 chan = format_desc->swizzle[0];
1408 }
1409 else {
1410 chan = util_format_get_first_non_void_channel(format_desc->format);
1411 }
1412 if (chan >= 0 && chan <= UTIL_FORMAT_SWIZZLE_W) {
1413 unsigned chan_type = format_desc->channel[chan].type;
1414 unsigned chan_norm = format_desc->channel[chan].normalized;
1415 unsigned chan_pure = format_desc->channel[chan].pure_integer;
1416 if (chan_type == UTIL_FORMAT_TYPE_SIGNED) {
1417 if (chan_norm) {
1418 min_clamp = lp_build_const_vec(gallivm, vec4_type, -1.0F);
1419 max_clamp = vec4_bld.one;
1420 }
1421 else if (chan_pure) {
1422 /*
1423 * Border color was stored as int, hence need min/max clamp
1424 * only if chan has less than 32 bits..
1425 */
1426 unsigned chan_size = format_desc->channel[chan].size;
1427 if (chan_size < 32) {
1428 min_clamp = lp_build_const_int_vec(gallivm, vec4_type,
1429 0 - (1 << (chan_size - 1)));
1430 max_clamp = lp_build_const_int_vec(gallivm, vec4_type,
1431 (1 << (chan_size - 1)) - 1);
1432 }
1433 }
1434 /* TODO: no idea about non-pure, non-normalized! */
1435 }
1436 else if (chan_type == UTIL_FORMAT_TYPE_UNSIGNED) {
1437 if (chan_norm) {
1438 min_clamp = vec4_bld.zero;
1439 max_clamp = vec4_bld.one;
1440 }
1441 /*
1442 * Need a ugly hack here, because we don't have Z32_FLOAT_X8X24
1443 * we use Z32_FLOAT_S8X24 to imply sampling depth component
1444 * and ignoring stencil, which will blow up here if we try to
1445 * do a uint clamp in a float texel build...
1446 * And even if we had that format, mesa st also thinks using z24s8
1447 * means depth sampling ignoring stencil.
1448 */
1449 else if (chan_pure) {
1450 /*
1451 * Border color was stored as uint, hence never need min
1452 * clamp, and only need max clamp if chan has less than 32 bits.
1453 */
1454 unsigned chan_size = format_desc->channel[chan].size;
1455 if (chan_size < 32) {
1456 max_clamp = lp_build_const_int_vec(gallivm, vec4_type,
1457 (1 << chan_size) - 1);
1458 }
1459 /* TODO: no idea about non-pure, non-normalized! */
1460 }
1461 }
1462 else if (chan_type == UTIL_FORMAT_TYPE_FIXED) {
1463 /* TODO: I have no idea what clamp this would need if any! */
1464 }
1465 }
1466 /* mixed plain formats (or different pure size) */
1467 switch (format_desc->format) {
1468 case PIPE_FORMAT_B10G10R10A2_UINT:
1469 case PIPE_FORMAT_R10G10B10A2_UINT:
1470 {
1471 unsigned max10 = (1 << 10) - 1;
1472 max_clamp = lp_build_const_aos(gallivm, vec4_type, max10, max10,
1473 max10, (1 << 2) - 1, NULL);
1474 }
1475 break;
1476 case PIPE_FORMAT_R10SG10SB10SA2U_NORM:
1477 min_clamp = lp_build_const_aos(gallivm, vec4_type, -1.0F, -1.0F,
1478 -1.0F, 0.0F, NULL);
1479 max_clamp = vec4_bld.one;
1480 break;
1481 case PIPE_FORMAT_R8SG8SB8UX8U_NORM:
1482 case PIPE_FORMAT_R5SG5SB6U_NORM:
1483 min_clamp = lp_build_const_aos(gallivm, vec4_type, -1.0F, -1.0F,
1484 0.0F, 0.0F, NULL);
1485 max_clamp = vec4_bld.one;
1486 break;
1487 default:
1488 break;
1489 }
1490 }
1491 else {
1492 /* cannot figure this out from format description */
1493 if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
1494 /* s3tc formats are always unorm */
1495 min_clamp = vec4_bld.zero;
1496 max_clamp = vec4_bld.one;
1497 }
1498 else if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC ||
1499 format_desc->layout == UTIL_FORMAT_LAYOUT_ETC) {
1500 switch (format_desc->format) {
1501 case PIPE_FORMAT_RGTC1_UNORM:
1502 case PIPE_FORMAT_RGTC2_UNORM:
1503 case PIPE_FORMAT_LATC1_UNORM:
1504 case PIPE_FORMAT_LATC2_UNORM:
1505 case PIPE_FORMAT_ETC1_RGB8:
1506 min_clamp = vec4_bld.zero;
1507 max_clamp = vec4_bld.one;
1508 break;
1509 case PIPE_FORMAT_RGTC1_SNORM:
1510 case PIPE_FORMAT_RGTC2_SNORM:
1511 case PIPE_FORMAT_LATC1_SNORM:
1512 case PIPE_FORMAT_LATC2_SNORM:
1513 min_clamp = lp_build_const_vec(gallivm, vec4_type, -1.0F);
1514 max_clamp = vec4_bld.one;
1515 break;
1516 default:
1517 assert(0);
1518 break;
1519 }
1520 }
1521 /*
1522 * all others from subsampled/other group, though we don't care
1523 * about yuv (and should not have any from zs here)
1524 */
1525 else if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_YUV){
1526 switch (format_desc->format) {
1527 case PIPE_FORMAT_R8G8_B8G8_UNORM:
1528 case PIPE_FORMAT_G8R8_G8B8_UNORM:
1529 case PIPE_FORMAT_G8R8_B8R8_UNORM:
1530 case PIPE_FORMAT_R8G8_R8B8_UNORM:
1531 case PIPE_FORMAT_R1_UNORM: /* doesn't make sense but ah well */
1532 min_clamp = vec4_bld.zero;
1533 max_clamp = vec4_bld.one;
1534 break;
1535 case PIPE_FORMAT_R8G8Bx_SNORM:
1536 min_clamp = lp_build_const_vec(gallivm, vec4_type, -1.0F);
1537 max_clamp = vec4_bld.one;
1538 break;
1539 /*
1540 * Note smallfloat formats usually don't need clamping
1541 * (they still have infinite range) however this is not
1542 * true for r11g11b10 and r9g9b9e5, which can't represent
1543 * negative numbers (and additionally r9g9b9e5 can't represent
1544 * very large numbers). d3d10 seems happy without clamping in
1545 * this case, but gl spec is pretty clear: "for floating
1546 * point and integer formats, border values are clamped to
1547 * the representable range of the format" so do that here.
1548 */
1549 case PIPE_FORMAT_R11G11B10_FLOAT:
1550 min_clamp = vec4_bld.zero;
1551 break;
1552 case PIPE_FORMAT_R9G9B9E5_FLOAT:
1553 min_clamp = vec4_bld.zero;
1554 max_clamp = lp_build_const_vec(gallivm, vec4_type, MAX_RGB9E5);
1555 break;
1556 default:
1557 assert(0);
1558 break;
1559 }
1560 }
1561 }
1562
1563 if (min_clamp) {
1564 border_color = lp_build_max(&vec4_bld, border_color, min_clamp);
1565 }
1566 if (max_clamp) {
1567 border_color = lp_build_min(&vec4_bld, border_color, max_clamp);
1568 }
1569
1570 bld->border_color_clamped = border_color;
1571 }
1572
1573
1574 /**
1575 * General texture sampling codegen.
1576 * This function handles texture sampling for all texture targets (1D,
1577 * 2D, 3D, cube) and all filtering modes.
1578 */
1579 static void
1580 lp_build_sample_general(struct lp_build_sample_context *bld,
1581 unsigned sampler_unit,
1582 LLVMValueRef *coords,
1583 const LLVMValueRef *offsets,
1584 LLVMValueRef lod_ipart,
1585 LLVMValueRef lod_fpart,
1586 LLVMValueRef ilevel0,
1587 LLVMValueRef ilevel1,
1588 LLVMValueRef *colors_out)
1589 {
1590 struct lp_build_context *int_bld = &bld->int_bld;
1591 LLVMBuilderRef builder = bld->gallivm->builder;
1592 const struct lp_static_sampler_state *sampler_state = bld->static_sampler_state;
1593 const unsigned mip_filter = sampler_state->min_mip_filter;
1594 const unsigned min_filter = sampler_state->min_img_filter;
1595 const unsigned mag_filter = sampler_state->mag_img_filter;
1596 LLVMValueRef texels[4];
1597 unsigned chan;
1598
1599 /* if we need border color, (potentially) clamp it now */
1600 if (lp_sampler_wrap_mode_uses_border_color(sampler_state->wrap_s,
1601 min_filter,
1602 mag_filter) ||
1603 (bld->dims > 1 &&
1604 lp_sampler_wrap_mode_uses_border_color(sampler_state->wrap_t,
1605 min_filter,
1606 mag_filter)) ||
1607 (bld->dims > 2 &&
1608 lp_sampler_wrap_mode_uses_border_color(sampler_state->wrap_r,
1609 min_filter,
1610 mag_filter))) {
1611 lp_build_clamp_border_color(bld, sampler_unit);
1612 }
1613
1614
1615 /*
1616 * Get/interpolate texture colors.
1617 */
1618
1619 for (chan = 0; chan < 4; ++chan) {
1620 texels[chan] = lp_build_alloca(bld->gallivm, bld->texel_bld.vec_type, "");
1621 lp_build_name(texels[chan], "sampler%u_texel_%c_var", sampler_unit, "xyzw"[chan]);
1622 }
1623
1624 if (min_filter == mag_filter) {
1625 /* no need to distinguish between minification and magnification */
1626 lp_build_sample_mipmap(bld, sampler_unit,
1627 min_filter, mip_filter,
1628 coords, offsets,
1629 ilevel0, ilevel1, lod_fpart,
1630 texels);
1631 }
1632 else {
1633 /* Emit conditional to choose min image filter or mag image filter
1634 * depending on the lod being > 0 or <= 0, respectively.
1635 */
1636 struct lp_build_if_state if_ctx;
1637 LLVMValueRef minify;
1638
1639 /*
1640 * XXX this should take all lods into account, if some are min
1641 * some max probably could hack up the coords/weights in the linear
1642 * path with selects to work for nearest.
1643 * If that's just two quads sitting next to each other it seems
1644 * quite ok to do the same filtering method on both though, at
1645 * least unless we have explicit lod (and who uses different
1646 * min/mag filter with that?)
1647 */
1648 if (bld->num_lods > 1)
1649 lod_ipart = LLVMBuildExtractElement(builder, lod_ipart,
1650 lp_build_const_int32(bld->gallivm, 0), "");
1651
1652 /* minify = lod >= 0.0 */
1653 minify = LLVMBuildICmp(builder, LLVMIntSGE,
1654 lod_ipart, int_bld->zero, "");
1655
1656 lp_build_if(&if_ctx, bld->gallivm, minify);
1657 {
1658 /* Use the minification filter */
1659 lp_build_sample_mipmap(bld, sampler_unit,
1660 min_filter, mip_filter,
1661 coords, offsets,
1662 ilevel0, ilevel1, lod_fpart,
1663 texels);
1664 }
1665 lp_build_else(&if_ctx);
1666 {
1667 /* Use the magnification filter */
1668 lp_build_sample_mipmap(bld, sampler_unit,
1669 mag_filter, PIPE_TEX_MIPFILTER_NONE,
1670 coords, offsets,
1671 ilevel0, NULL, NULL,
1672 texels);
1673 }
1674 lp_build_endif(&if_ctx);
1675 }
1676
1677 for (chan = 0; chan < 4; ++chan) {
1678 colors_out[chan] = LLVMBuildLoad(builder, texels[chan], "");
1679 lp_build_name(colors_out[chan], "sampler%u_texel_%c", sampler_unit, "xyzw"[chan]);
1680 }
1681 }
1682
1683
1684 /**
1685 * Texel fetch function.
1686 * In contrast to general sampling there is no filtering, no coord minification,
1687 * lod (if any) is always explicit uint, coords are uints (in terms of texel units)
1688 * directly to be applied to the selected mip level (after adding texel offsets).
1689 * This function handles texel fetch for all targets where texel fetch is supported
1690 * (no cube maps, but 1d, 2d, 3d are supported, arrays and buffers should be too).
1691 */
1692 static void
1693 lp_build_fetch_texel(struct lp_build_sample_context *bld,
1694 unsigned texture_unit,
1695 const LLVMValueRef *coords,
1696 LLVMValueRef explicit_lod,
1697 const LLVMValueRef *offsets,
1698 LLVMValueRef *colors_out)
1699 {
1700 struct lp_build_context *perquadi_bld = &bld->leveli_bld;
1701 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
1702 unsigned dims = bld->dims, chan;
1703 unsigned target = bld->static_texture_state->target;
1704 boolean out_of_bound_ret_zero = TRUE;
1705 LLVMValueRef size, ilevel;
1706 LLVMValueRef row_stride_vec = NULL, img_stride_vec = NULL;
1707 LLVMValueRef x = coords[0], y = coords[1], z = coords[2];
1708 LLVMValueRef width, height, depth, i, j;
1709 LLVMValueRef offset, out_of_bounds, out1;
1710
1711 out_of_bounds = int_coord_bld->zero;
1712
1713 if (explicit_lod && bld->static_texture_state->target != PIPE_BUFFER) {
1714 if (bld->num_lods != int_coord_bld->type.length) {
1715 ilevel = lp_build_pack_aos_scalars(bld->gallivm, int_coord_bld->type,
1716 perquadi_bld->type, explicit_lod, 0);
1717 }
1718 else {
1719 ilevel = explicit_lod;
1720 }
1721 lp_build_nearest_mip_level(bld, texture_unit, ilevel, &ilevel,
1722 out_of_bound_ret_zero ? &out_of_bounds : NULL);
1723 }
1724 else {
1725 assert(bld->num_lods == 1);
1726 if (bld->static_texture_state->target != PIPE_BUFFER) {
1727 ilevel = bld->dynamic_state->first_level(bld->dynamic_state,
1728 bld->gallivm, texture_unit);
1729 }
1730 else {
1731 ilevel = lp_build_const_int32(bld->gallivm, 0);
1732 }
1733 }
1734 lp_build_mipmap_level_sizes(bld, ilevel,
1735 &size,
1736 &row_stride_vec, &img_stride_vec);
1737 lp_build_extract_image_sizes(bld, &bld->int_size_bld, int_coord_bld->type,
1738 size, &width, &height, &depth);
1739
1740 if (target == PIPE_TEXTURE_1D_ARRAY ||
1741 target == PIPE_TEXTURE_2D_ARRAY) {
1742 if (out_of_bound_ret_zero) {
1743 z = lp_build_layer_coord(bld, texture_unit, z, &out1);
1744 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1745 }
1746 else {
1747 z = lp_build_layer_coord(bld, texture_unit, z, NULL);
1748 }
1749 }
1750
1751 /* This is a lot like border sampling */
1752 if (offsets[0]) {
1753 /*
1754 * coords are really unsigned, offsets are signed, but I don't think
1755 * exceeding 31 bits is possible
1756 */
1757 x = lp_build_add(int_coord_bld, x, offsets[0]);
1758 }
1759 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, x, int_coord_bld->zero);
1760 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1761 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, x, width);
1762 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1763
1764 if (dims >= 2) {
1765 if (offsets[1]) {
1766 y = lp_build_add(int_coord_bld, y, offsets[1]);
1767 }
1768 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, y, int_coord_bld->zero);
1769 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1770 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, y, height);
1771 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1772
1773 if (dims >= 3) {
1774 if (offsets[2]) {
1775 z = lp_build_add(int_coord_bld, z, offsets[2]);
1776 }
1777 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, z, int_coord_bld->zero);
1778 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1779 out1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, z, depth);
1780 out_of_bounds = lp_build_or(int_coord_bld, out_of_bounds, out1);
1781 }
1782 }
1783
1784 lp_build_sample_offset(int_coord_bld,
1785 bld->format_desc,
1786 x, y, z, row_stride_vec, img_stride_vec,
1787 &offset, &i, &j);
1788
1789 if (bld->static_texture_state->target != PIPE_BUFFER) {
1790 offset = lp_build_add(int_coord_bld, offset,
1791 lp_build_get_mip_offsets(bld, ilevel));
1792 }
1793
1794 offset = lp_build_andnot(int_coord_bld, offset, out_of_bounds);
1795
1796 lp_build_fetch_rgba_soa(bld->gallivm,
1797 bld->format_desc,
1798 bld->texel_type,
1799 bld->base_ptr, offset,
1800 i, j,
1801 colors_out);
1802
1803 if (out_of_bound_ret_zero) {
1804 /*
1805 * Only needed for ARB_robust_buffer_access_behavior and d3d10.
1806 * Could use min/max above instead of out-of-bounds comparisons
1807 * if we don't care about the result returned for out-of-bounds.
1808 */
1809 for (chan = 0; chan < 4; chan++) {
1810 colors_out[chan] = lp_build_select(&bld->texel_bld, out_of_bounds,
1811 bld->texel_bld.zero, colors_out[chan]);
1812 }
1813 }
1814 }
1815
1816
1817 /**
1818 * Just set texels to white instead of actually sampling the texture.
1819 * For debugging.
1820 */
1821 void
1822 lp_build_sample_nop(struct gallivm_state *gallivm,
1823 struct lp_type type,
1824 const LLVMValueRef *coords,
1825 LLVMValueRef texel_out[4])
1826 {
1827 LLVMValueRef one = lp_build_one(gallivm, type);
1828 unsigned chan;
1829
1830 for (chan = 0; chan < 4; chan++) {
1831 texel_out[chan] = one;
1832 }
1833 }
1834
1835
1836 /**
1837 * Build texture sampling code.
1838 * 'texel' will return a vector of four LLVMValueRefs corresponding to
1839 * R, G, B, A.
1840 * \param type vector float type to use for coords, etc.
1841 * \param is_fetch if this is a texel fetch instruction.
1842 * \param derivs partial derivatives of (s,t,r,q) with respect to x and y
1843 */
1844 void
1845 lp_build_sample_soa(struct gallivm_state *gallivm,
1846 const struct lp_static_texture_state *static_texture_state,
1847 const struct lp_static_sampler_state *static_sampler_state,
1848 struct lp_sampler_dynamic_state *dynamic_state,
1849 struct lp_type type,
1850 boolean is_fetch,
1851 unsigned texture_index,
1852 unsigned sampler_index,
1853 const LLVMValueRef *coords,
1854 const LLVMValueRef *offsets,
1855 const struct lp_derivatives *derivs, /* optional */
1856 LLVMValueRef lod_bias, /* optional */
1857 LLVMValueRef explicit_lod, /* optional */
1858 enum lp_sampler_lod_property lod_property,
1859 LLVMValueRef texel_out[4])
1860 {
1861 unsigned target = static_texture_state->target;
1862 unsigned dims = texture_dims(target);
1863 unsigned num_quads = type.length / 4;
1864 unsigned mip_filter, i;
1865 struct lp_build_sample_context bld;
1866 struct lp_static_sampler_state derived_sampler_state = *static_sampler_state;
1867 LLVMTypeRef i32t = LLVMInt32TypeInContext(gallivm->context);
1868 LLVMBuilderRef builder = gallivm->builder;
1869 LLVMValueRef tex_width, newcoords[5];
1870
1871 if (0) {
1872 enum pipe_format fmt = static_texture_state->format;
1873 debug_printf("Sample from %s\n", util_format_name(fmt));
1874 }
1875
1876 assert(type.floating);
1877
1878 /* Setup our build context */
1879 memset(&bld, 0, sizeof bld);
1880 bld.gallivm = gallivm;
1881 bld.static_sampler_state = &derived_sampler_state;
1882 bld.static_texture_state = static_texture_state;
1883 bld.dynamic_state = dynamic_state;
1884 bld.format_desc = util_format_description(static_texture_state->format);
1885 bld.dims = dims;
1886
1887 bld.vector_width = lp_type_width(type);
1888
1889 bld.float_type = lp_type_float(32);
1890 bld.int_type = lp_type_int(32);
1891 bld.coord_type = type;
1892 bld.int_coord_type = lp_int_type(type);
1893 bld.float_size_in_type = lp_type_float(32);
1894 bld.float_size_in_type.length = dims > 1 ? 4 : 1;
1895 bld.int_size_in_type = lp_int_type(bld.float_size_in_type);
1896 bld.texel_type = type;
1897
1898 /* always using the first channel hopefully should be safe,
1899 * if not things WILL break in other places anyway.
1900 */
1901 if (bld.format_desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB &&
1902 bld.format_desc->channel[0].pure_integer) {
1903 if (bld.format_desc->channel[0].type == UTIL_FORMAT_TYPE_SIGNED) {
1904 bld.texel_type = lp_type_int_vec(type.width, type.width * type.length);
1905 }
1906 else if (bld.format_desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED) {
1907 bld.texel_type = lp_type_uint_vec(type.width, type.width * type.length);
1908 }
1909 }
1910 else if (util_format_has_stencil(bld.format_desc) &&
1911 !util_format_has_depth(bld.format_desc)) {
1912 /* for stencil only formats, sample stencil (uint) */
1913 bld.texel_type = lp_type_int_vec(type.width, type.width * type.length);
1914 }
1915
1916 if (!static_texture_state->level_zero_only) {
1917 derived_sampler_state.min_mip_filter = static_sampler_state->min_mip_filter;
1918 } else {
1919 derived_sampler_state.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
1920 }
1921 mip_filter = derived_sampler_state.min_mip_filter;
1922
1923 if (0) {
1924 debug_printf(" .min_mip_filter = %u\n", derived_sampler_state.min_mip_filter);
1925 }
1926
1927 /*
1928 * This is all a bit complicated different paths are chosen for performance
1929 * reasons.
1930 * Essentially, there can be 1 lod per element, 1 lod per quad or 1 lod for
1931 * everything (the last two options are equivalent for 4-wide case).
1932 * If there's per-quad lod but we split to 4-wide so we can use AoS, per-quad
1933 * lod is calculated then the lod value extracted afterwards so making this
1934 * case basically the same as far as lod handling is concerned for the
1935 * further sample/filter code as the 1 lod for everything case.
1936 * Different lod handling mostly shows up when building mipmap sizes
1937 * (lp_build_mipmap_level_sizes() and friends) and also in filtering
1938 * (getting the fractional part of the lod to the right texels).
1939 */
1940
1941 /*
1942 * There are other situations where at least the multiple int lods could be
1943 * avoided like min and max lod being equal.
1944 */
1945 if (explicit_lod && lod_property == LP_SAMPLER_LOD_PER_ELEMENT &&
1946 ((is_fetch && target != PIPE_BUFFER) ||
1947 (!is_fetch && mip_filter != PIPE_TEX_MIPFILTER_NONE)))
1948 bld.num_lods = type.length;
1949 /* TODO: for true scalar_lod should only use 1 lod value */
1950 else if ((is_fetch && explicit_lod && target != PIPE_BUFFER ) ||
1951 (!is_fetch && mip_filter != PIPE_TEX_MIPFILTER_NONE)) {
1952 bld.num_lods = num_quads;
1953 }
1954 else {
1955 bld.num_lods = 1;
1956 }
1957
1958 bld.levelf_type = type;
1959 /* we want native vector size to be able to use our intrinsics */
1960 if (bld.num_lods != type.length) {
1961 bld.levelf_type.length = type.length > 4 ? ((type.length + 15) / 16) * 4 : 1;
1962 }
1963 bld.leveli_type = lp_int_type(bld.levelf_type);
1964 bld.float_size_type = bld.float_size_in_type;
1965 /* Note: size vectors may not be native. They contain minified w/h/d/_ values,
1966 * with per-element lod that is w0/h0/d0/_/w1/h1/d1_/... so up to 8x4f32 */
1967 if (bld.num_lods > 1) {
1968 bld.float_size_type.length = bld.num_lods == type.length ?
1969 bld.num_lods * bld.float_size_in_type.length :
1970 type.length;
1971 }
1972 bld.int_size_type = lp_int_type(bld.float_size_type);
1973
1974 lp_build_context_init(&bld.float_bld, gallivm, bld.float_type);
1975 lp_build_context_init(&bld.float_vec_bld, gallivm, type);
1976 lp_build_context_init(&bld.int_bld, gallivm, bld.int_type);
1977 lp_build_context_init(&bld.coord_bld, gallivm, bld.coord_type);
1978 lp_build_context_init(&bld.int_coord_bld, gallivm, bld.int_coord_type);
1979 lp_build_context_init(&bld.int_size_in_bld, gallivm, bld.int_size_in_type);
1980 lp_build_context_init(&bld.float_size_in_bld, gallivm, bld.float_size_in_type);
1981 lp_build_context_init(&bld.int_size_bld, gallivm, bld.int_size_type);
1982 lp_build_context_init(&bld.float_size_bld, gallivm, bld.float_size_type);
1983 lp_build_context_init(&bld.texel_bld, gallivm, bld.texel_type);
1984 lp_build_context_init(&bld.levelf_bld, gallivm, bld.levelf_type);
1985 lp_build_context_init(&bld.leveli_bld, gallivm, bld.leveli_type);
1986
1987 /* Get the dynamic state */
1988 tex_width = dynamic_state->width(dynamic_state, gallivm, texture_index);
1989 bld.row_stride_array = dynamic_state->row_stride(dynamic_state, gallivm, texture_index);
1990 bld.img_stride_array = dynamic_state->img_stride(dynamic_state, gallivm, texture_index);
1991 bld.base_ptr = dynamic_state->base_ptr(dynamic_state, gallivm, texture_index);
1992 bld.mip_offsets = dynamic_state->mip_offsets(dynamic_state, gallivm, texture_index);
1993 /* Note that mip_offsets is an array[level] of offsets to texture images */
1994
1995 /* width, height, depth as single int vector */
1996 if (dims <= 1) {
1997 bld.int_size = tex_width;
1998 }
1999 else {
2000 bld.int_size = LLVMBuildInsertElement(builder, bld.int_size_in_bld.undef,
2001 tex_width, LLVMConstInt(i32t, 0, 0), "");
2002 if (dims >= 2) {
2003 LLVMValueRef tex_height =
2004 dynamic_state->height(dynamic_state, gallivm, texture_index);
2005 bld.int_size = LLVMBuildInsertElement(builder, bld.int_size,
2006 tex_height, LLVMConstInt(i32t, 1, 0), "");
2007 if (dims >= 3) {
2008 LLVMValueRef tex_depth =
2009 dynamic_state->depth(dynamic_state, gallivm, texture_index);
2010 bld.int_size = LLVMBuildInsertElement(builder, bld.int_size,
2011 tex_depth, LLVMConstInt(i32t, 2, 0), "");
2012 }
2013 }
2014 }
2015
2016 for (i = 0; i < 5; i++) {
2017 newcoords[i] = coords[i];
2018 }
2019
2020 if (0) {
2021 /* For debug: no-op texture sampling */
2022 lp_build_sample_nop(gallivm,
2023 bld.texel_type,
2024 newcoords,
2025 texel_out);
2026 }
2027
2028 else if (is_fetch) {
2029 lp_build_fetch_texel(&bld, texture_index, newcoords,
2030 explicit_lod, offsets,
2031 texel_out);
2032 }
2033
2034 else {
2035 LLVMValueRef lod_ipart = NULL, lod_fpart = NULL;
2036 LLVMValueRef ilevel0 = NULL, ilevel1 = NULL;
2037 boolean use_aos = util_format_fits_8unorm(bld.format_desc) &&
2038 /* not sure this is strictly needed or simply impossible */
2039 static_sampler_state->compare_mode == PIPE_TEX_COMPARE_NONE &&
2040 lp_is_simple_wrap_mode(static_sampler_state->wrap_s);
2041 if (dims > 1) {
2042 use_aos &= lp_is_simple_wrap_mode(static_sampler_state->wrap_t);
2043 if (dims > 2) {
2044 use_aos &= lp_is_simple_wrap_mode(static_sampler_state->wrap_r);
2045 }
2046 }
2047
2048 if ((gallivm_debug & GALLIVM_DEBUG_PERF) &&
2049 !use_aos && util_format_fits_8unorm(bld.format_desc)) {
2050 debug_printf("%s: using floating point linear filtering for %s\n",
2051 __FUNCTION__, bld.format_desc->short_name);
2052 debug_printf(" min_img %d mag_img %d mip %d wraps %d wrapt %d wrapr %d\n",
2053 static_sampler_state->min_img_filter,
2054 static_sampler_state->mag_img_filter,
2055 static_sampler_state->min_mip_filter,
2056 static_sampler_state->wrap_s,
2057 static_sampler_state->wrap_t,
2058 static_sampler_state->wrap_r);
2059 }
2060
2061 lp_build_sample_common(&bld, texture_index, sampler_index,
2062 newcoords,
2063 derivs, lod_bias, explicit_lod,
2064 &lod_ipart, &lod_fpart,
2065 &ilevel0, &ilevel1);
2066
2067 /*
2068 * we only try 8-wide sampling with soa as it appears to
2069 * be a loss with aos with AVX (but it should work).
2070 * (It should be faster if we'd support avx2)
2071 */
2072 if (num_quads == 1 || !use_aos) {
2073
2074 if (num_quads > 1) {
2075 if (mip_filter == PIPE_TEX_MIPFILTER_NONE) {
2076 LLVMValueRef index0 = lp_build_const_int32(gallivm, 0);
2077 /*
2078 * These parameters are the same for all quads,
2079 * could probably simplify.
2080 */
2081 lod_ipart = LLVMBuildExtractElement(builder, lod_ipart, index0, "");
2082 ilevel0 = LLVMBuildExtractElement(builder, ilevel0, index0, "");
2083 }
2084 }
2085 if (use_aos) {
2086 /* do sampling/filtering with fixed pt arithmetic */
2087 lp_build_sample_aos(&bld, sampler_index,
2088 newcoords[0], newcoords[1],
2089 newcoords[2],
2090 offsets, lod_ipart, lod_fpart,
2091 ilevel0, ilevel1,
2092 texel_out);
2093 }
2094
2095 else {
2096 lp_build_sample_general(&bld, sampler_index,
2097 newcoords, offsets,
2098 lod_ipart, lod_fpart,
2099 ilevel0, ilevel1,
2100 texel_out);
2101 }
2102 }
2103 else {
2104 unsigned j;
2105 struct lp_build_sample_context bld4;
2106 struct lp_type type4 = type;
2107 unsigned i;
2108 LLVMValueRef texelout4[4];
2109 LLVMValueRef texelouttmp[4][LP_MAX_VECTOR_LENGTH/16];
2110
2111 type4.length = 4;
2112
2113 /* Setup our build context */
2114 memset(&bld4, 0, sizeof bld4);
2115 bld4.gallivm = bld.gallivm;
2116 bld4.static_texture_state = bld.static_texture_state;
2117 bld4.static_sampler_state = bld.static_sampler_state;
2118 bld4.dynamic_state = bld.dynamic_state;
2119 bld4.format_desc = bld.format_desc;
2120 bld4.dims = bld.dims;
2121 bld4.row_stride_array = bld.row_stride_array;
2122 bld4.img_stride_array = bld.img_stride_array;
2123 bld4.base_ptr = bld.base_ptr;
2124 bld4.mip_offsets = bld.mip_offsets;
2125 bld4.int_size = bld.int_size;
2126
2127 bld4.vector_width = lp_type_width(type4);
2128
2129 bld4.float_type = lp_type_float(32);
2130 bld4.int_type = lp_type_int(32);
2131 bld4.coord_type = type4;
2132 bld4.int_coord_type = lp_int_type(type4);
2133 bld4.float_size_in_type = lp_type_float(32);
2134 bld4.float_size_in_type.length = dims > 1 ? 4 : 1;
2135 bld4.int_size_in_type = lp_int_type(bld4.float_size_in_type);
2136 bld4.texel_type = bld.texel_type;
2137 bld4.texel_type.length = 4;
2138 bld4.levelf_type = type4;
2139 /* we want native vector size to be able to use our intrinsics */
2140 bld4.levelf_type.length = 1;
2141 bld4.leveli_type = lp_int_type(bld4.levelf_type);
2142
2143 if (explicit_lod && lod_property == LP_SAMPLER_LOD_PER_ELEMENT &&
2144 ((is_fetch && target != PIPE_BUFFER) ||
2145 (!is_fetch && mip_filter != PIPE_TEX_MIPFILTER_NONE)))
2146 bld4.num_lods = type4.length;
2147 else
2148 bld4.num_lods = 1;
2149
2150 bld4.levelf_type = type4;
2151 /* we want native vector size to be able to use our intrinsics */
2152 if (bld4.num_lods != type4.length) {
2153 bld4.levelf_type.length = 1;
2154 }
2155 bld4.leveli_type = lp_int_type(bld4.levelf_type);
2156 bld4.float_size_type = bld4.float_size_in_type;
2157 if (bld4.num_lods > 1) {
2158 bld4.float_size_type.length = bld4.num_lods == type4.length ?
2159 bld4.num_lods * bld4.float_size_in_type.length :
2160 type4.length;
2161 }
2162 bld4.int_size_type = lp_int_type(bld4.float_size_type);
2163
2164 lp_build_context_init(&bld4.float_bld, gallivm, bld4.float_type);
2165 lp_build_context_init(&bld4.float_vec_bld, gallivm, type4);
2166 lp_build_context_init(&bld4.int_bld, gallivm, bld4.int_type);
2167 lp_build_context_init(&bld4.coord_bld, gallivm, bld4.coord_type);
2168 lp_build_context_init(&bld4.int_coord_bld, gallivm, bld4.int_coord_type);
2169 lp_build_context_init(&bld4.int_size_in_bld, gallivm, bld4.int_size_in_type);
2170 lp_build_context_init(&bld4.float_size_in_bld, gallivm, bld4.float_size_in_type);
2171 lp_build_context_init(&bld4.int_size_bld, gallivm, bld4.int_size_type);
2172 lp_build_context_init(&bld4.float_size_bld, gallivm, bld4.float_size_type);
2173 lp_build_context_init(&bld4.texel_bld, gallivm, bld4.texel_type);
2174 lp_build_context_init(&bld4.levelf_bld, gallivm, bld4.levelf_type);
2175 lp_build_context_init(&bld4.leveli_bld, gallivm, bld4.leveli_type);
2176
2177 for (i = 0; i < num_quads; i++) {
2178 LLVMValueRef s4, t4, r4;
2179 LLVMValueRef lod_ipart4, lod_fpart4 = NULL;
2180 LLVMValueRef ilevel04, ilevel14 = NULL;
2181 LLVMValueRef offsets4[4] = { NULL };
2182 unsigned num_lods = bld4.num_lods;
2183
2184 s4 = lp_build_extract_range(gallivm, newcoords[0], 4*i, 4);
2185 t4 = lp_build_extract_range(gallivm, newcoords[1], 4*i, 4);
2186 r4 = lp_build_extract_range(gallivm, newcoords[2], 4*i, 4);
2187
2188 if (offsets[0]) {
2189 offsets4[0] = lp_build_extract_range(gallivm, offsets[0], 4*i, 4);
2190 if (dims > 1) {
2191 offsets4[1] = lp_build_extract_range(gallivm, offsets[1], 4*i, 4);
2192 if (dims > 2) {
2193 offsets4[2] = lp_build_extract_range(gallivm, offsets[2], 4*i, 4);
2194 }
2195 }
2196 }
2197 lod_ipart4 = lp_build_extract_range(gallivm, lod_ipart, num_lods * i, num_lods);
2198 ilevel04 = lp_build_extract_range(gallivm, ilevel0, num_lods * i, num_lods);
2199 if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
2200 ilevel14 = lp_build_extract_range(gallivm, ilevel1, num_lods * i, num_lods);
2201 lod_fpart4 = lp_build_extract_range(gallivm, lod_fpart, num_lods * i, num_lods);
2202 }
2203
2204 if (use_aos) {
2205 /* do sampling/filtering with fixed pt arithmetic */
2206 lp_build_sample_aos(&bld4, sampler_index,
2207 s4, t4, r4, offsets4,
2208 lod_ipart4, lod_fpart4,
2209 ilevel04, ilevel14,
2210 texelout4);
2211 }
2212
2213 else {
2214 /* this path is currently unreachable and hence might break easily... */
2215 LLVMValueRef newcoords4[5];
2216 newcoords4[0] = s4;
2217 newcoords4[1] = t4;
2218 newcoords4[2] = r4;
2219 newcoords4[3] = lp_build_extract_range(gallivm, newcoords[3], 4*i, 4);
2220 newcoords4[4] = lp_build_extract_range(gallivm, newcoords[4], 4*i, 4);
2221
2222 lp_build_sample_general(&bld4, sampler_index,
2223 newcoords4, offsets4,
2224 lod_ipart4, lod_fpart4,
2225 ilevel04, ilevel14,
2226 texelout4);
2227 }
2228 for (j = 0; j < 4; j++) {
2229 texelouttmp[j][i] = texelout4[j];
2230 }
2231 }
2232
2233 for (j = 0; j < 4; j++) {
2234 texel_out[j] = lp_build_concat(gallivm, texelouttmp[j], type4, num_quads);
2235 }
2236 }
2237 }
2238
2239 if (target != PIPE_BUFFER) {
2240 apply_sampler_swizzle(&bld, texel_out);
2241 }
2242
2243 /*
2244 * texel type can be a (32bit) int/uint (for pure int formats only),
2245 * however we are expected to always return floats (storage is untyped).
2246 */
2247 if (!bld.texel_type.floating) {
2248 unsigned chan;
2249 for (chan = 0; chan < 4; chan++) {
2250 texel_out[chan] = LLVMBuildBitCast(builder, texel_out[chan],
2251 lp_build_vec_type(gallivm, type), "");
2252 }
2253 }
2254 }
2255
2256 void
2257 lp_build_size_query_soa(struct gallivm_state *gallivm,
2258 const struct lp_static_texture_state *static_state,
2259 struct lp_sampler_dynamic_state *dynamic_state,
2260 struct lp_type int_type,
2261 unsigned texture_unit,
2262 unsigned target,
2263 boolean is_sviewinfo,
2264 enum lp_sampler_lod_property lod_property,
2265 LLVMValueRef explicit_lod,
2266 LLVMValueRef *sizes_out)
2267 {
2268 LLVMValueRef lod, level, size;
2269 LLVMValueRef first_level = NULL;
2270 int dims, i;
2271 boolean has_array;
2272 unsigned num_lods = 1;
2273 struct lp_build_context bld_int_vec4;
2274
2275 /*
2276 * Do some sanity verification about bound texture and shader dcl target.
2277 * Not entirely sure what's possible but assume array/non-array
2278 * always compatible (probably not ok for OpenGL but d3d10 has no
2279 * distinction of arrays at the resource level).
2280 * Everything else looks bogus (though not entirely sure about rect/2d).
2281 * Currently disabled because it causes assertion failures if there's
2282 * nothing bound (or rather a dummy texture, not that this case would
2283 * return the right values).
2284 */
2285 if (0 && static_state->target != target) {
2286 if (static_state->target == PIPE_TEXTURE_1D)
2287 assert(target == PIPE_TEXTURE_1D_ARRAY);
2288 else if (static_state->target == PIPE_TEXTURE_1D_ARRAY)
2289 assert(target == PIPE_TEXTURE_1D);
2290 else if (static_state->target == PIPE_TEXTURE_2D)
2291 assert(target == PIPE_TEXTURE_2D_ARRAY);
2292 else if (static_state->target == PIPE_TEXTURE_2D_ARRAY)
2293 assert(target == PIPE_TEXTURE_2D);
2294 else if (static_state->target == PIPE_TEXTURE_CUBE)
2295 assert(target == PIPE_TEXTURE_CUBE_ARRAY);
2296 else if (static_state->target == PIPE_TEXTURE_CUBE_ARRAY)
2297 assert(target == PIPE_TEXTURE_CUBE);
2298 else
2299 assert(0);
2300 }
2301
2302 dims = texture_dims(target);
2303
2304 switch (target) {
2305 case PIPE_TEXTURE_1D_ARRAY:
2306 case PIPE_TEXTURE_2D_ARRAY:
2307 has_array = TRUE;
2308 break;
2309 default:
2310 has_array = FALSE;
2311 break;
2312 }
2313
2314 assert(!int_type.floating);
2315
2316 lp_build_context_init(&bld_int_vec4, gallivm, lp_type_int_vec(32, 128));
2317
2318 if (explicit_lod) {
2319 /* FIXME: this needs to honor per-element lod */
2320 lod = LLVMBuildExtractElement(gallivm->builder, explicit_lod, lp_build_const_int32(gallivm, 0), "");
2321 first_level = dynamic_state->first_level(dynamic_state, gallivm, texture_unit);
2322 level = LLVMBuildAdd(gallivm->builder, lod, first_level, "level");
2323 lod = lp_build_broadcast_scalar(&bld_int_vec4, level);
2324 } else {
2325 lod = bld_int_vec4.zero;
2326 }
2327
2328 size = bld_int_vec4.undef;
2329
2330 size = LLVMBuildInsertElement(gallivm->builder, size,
2331 dynamic_state->width(dynamic_state, gallivm, texture_unit),
2332 lp_build_const_int32(gallivm, 0), "");
2333
2334 if (dims >= 2) {
2335 size = LLVMBuildInsertElement(gallivm->builder, size,
2336 dynamic_state->height(dynamic_state, gallivm, texture_unit),
2337 lp_build_const_int32(gallivm, 1), "");
2338 }
2339
2340 if (dims >= 3) {
2341 size = LLVMBuildInsertElement(gallivm->builder, size,
2342 dynamic_state->depth(dynamic_state, gallivm, texture_unit),
2343 lp_build_const_int32(gallivm, 2), "");
2344 }
2345
2346 size = lp_build_minify(&bld_int_vec4, size, lod);
2347
2348 if (has_array)
2349 size = LLVMBuildInsertElement(gallivm->builder, size,
2350 dynamic_state->depth(dynamic_state, gallivm, texture_unit),
2351 lp_build_const_int32(gallivm, dims), "");
2352
2353 /*
2354 * d3d10 requires zero for x/y/z values (but not w, i.e. mip levels)
2355 * if level is out of bounds (note this can't cover unbound texture
2356 * here, which also requires returning zero).
2357 */
2358 if (explicit_lod && is_sviewinfo) {
2359 LLVMValueRef last_level, out, out1;
2360 struct lp_build_context leveli_bld;
2361
2362 /* everything is scalar for now */
2363 lp_build_context_init(&leveli_bld, gallivm, lp_type_int_vec(32, 32));
2364 last_level = dynamic_state->last_level(dynamic_state, gallivm, texture_unit);
2365
2366 out = lp_build_cmp(&leveli_bld, PIPE_FUNC_LESS, level, first_level);
2367 out1 = lp_build_cmp(&leveli_bld, PIPE_FUNC_GREATER, level, last_level);
2368 out = lp_build_or(&leveli_bld, out, out1);
2369 if (num_lods == 1) {
2370 out = lp_build_broadcast_scalar(&bld_int_vec4, out);
2371 }
2372 else {
2373 /* TODO */
2374 assert(0);
2375 }
2376 size = lp_build_andnot(&bld_int_vec4, size, out);
2377 }
2378 for (i = 0; i < dims + (has_array ? 1 : 0); i++) {
2379 sizes_out[i] = lp_build_extract_broadcast(gallivm, bld_int_vec4.type, int_type,
2380 size,
2381 lp_build_const_int32(gallivm, i));
2382 }
2383 if (is_sviewinfo) {
2384 for (; i < 4; i++) {
2385 sizes_out[i] = lp_build_const_vec(gallivm, int_type, 0.0);
2386 }
2387 }
2388
2389 /*
2390 * if there's no explicit_lod (buffers, rects) queries requiring nr of
2391 * mips would be illegal.
2392 */
2393 if (is_sviewinfo && explicit_lod) {
2394 struct lp_build_context bld_int_scalar;
2395 LLVMValueRef num_levels;
2396 lp_build_context_init(&bld_int_scalar, gallivm, lp_type_int(32));
2397
2398 if (static_state->level_zero_only) {
2399 num_levels = bld_int_scalar.one;
2400 }
2401 else {
2402 LLVMValueRef last_level;
2403
2404 last_level = dynamic_state->last_level(dynamic_state, gallivm, texture_unit);
2405 num_levels = lp_build_sub(&bld_int_scalar, last_level, first_level);
2406 num_levels = lp_build_add(&bld_int_scalar, num_levels, bld_int_scalar.one);
2407 }
2408 sizes_out[3] = lp_build_broadcast(gallivm, lp_build_vec_type(gallivm, int_type),
2409 num_levels);
2410 }
2411 }