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gallivm: More comprehensive border usage logic.
[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 "util/u_debug.h"
39 #include "util/u_dump.h"
40 #include "util/u_memory.h"
41 #include "util/u_math.h"
42 #include "util/u_format.h"
43 #include "lp_bld_debug.h"
44 #include "lp_bld_type.h"
45 #include "lp_bld_const.h"
46 #include "lp_bld_conv.h"
47 #include "lp_bld_arit.h"
48 #include "lp_bld_bitarit.h"
49 #include "lp_bld_logic.h"
50 #include "lp_bld_printf.h"
51 #include "lp_bld_swizzle.h"
52 #include "lp_bld_flow.h"
53 #include "lp_bld_gather.h"
54 #include "lp_bld_format.h"
55 #include "lp_bld_sample.h"
56 #include "lp_bld_sample_aos.h"
57 #include "lp_bld_struct.h"
58 #include "lp_bld_quad.h"
59
60
61 /**
62 * Generate code to fetch a texel from a texture at int coords (x, y, z).
63 * The computation depends on whether the texture is 1D, 2D or 3D.
64 * The result, texel, will be float vectors:
65 * texel[0] = red values
66 * texel[1] = green values
67 * texel[2] = blue values
68 * texel[3] = alpha values
69 */
70 static void
71 lp_build_sample_texel_soa(struct lp_build_sample_context *bld,
72 unsigned unit,
73 LLVMValueRef width,
74 LLVMValueRef height,
75 LLVMValueRef depth,
76 LLVMValueRef x,
77 LLVMValueRef y,
78 LLVMValueRef z,
79 LLVMValueRef y_stride,
80 LLVMValueRef z_stride,
81 LLVMValueRef data_ptr,
82 LLVMValueRef texel_out[4])
83 {
84 const struct lp_sampler_static_state *static_state = bld->static_state;
85 const int dims = texture_dims(static_state->target);
86 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
87 LLVMValueRef offset;
88 LLVMValueRef i, j;
89 LLVMValueRef use_border = NULL;
90
91 /* use_border = x < 0 || x >= width || y < 0 || y >= height */
92 if (lp_sampler_wrap_mode_uses_border_color(static_state->wrap_s,
93 static_state->min_img_filter,
94 static_state->mag_img_filter)) {
95 LLVMValueRef b1, b2;
96 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, x, int_coord_bld->zero);
97 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, x, width);
98 use_border = LLVMBuildOr(bld->builder, b1, b2, "b1_or_b2");
99 }
100
101 if (dims >= 2 &&
102 lp_sampler_wrap_mode_uses_border_color(static_state->wrap_t,
103 static_state->min_img_filter,
104 static_state->mag_img_filter)) {
105 LLVMValueRef b1, b2;
106 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, y, int_coord_bld->zero);
107 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, y, height);
108 if (use_border) {
109 use_border = LLVMBuildOr(bld->builder, use_border, b1, "ub_or_b1");
110 use_border = LLVMBuildOr(bld->builder, use_border, b2, "ub_or_b2");
111 }
112 else {
113 use_border = LLVMBuildOr(bld->builder, b1, b2, "b1_or_b2");
114 }
115 }
116
117 if (dims == 3 &&
118 lp_sampler_wrap_mode_uses_border_color(static_state->wrap_r,
119 static_state->min_img_filter,
120 static_state->mag_img_filter)) {
121 LLVMValueRef b1, b2;
122 b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, z, int_coord_bld->zero);
123 b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, z, depth);
124 if (use_border) {
125 use_border = LLVMBuildOr(bld->builder, use_border, b1, "ub_or_b1");
126 use_border = LLVMBuildOr(bld->builder, use_border, b2, "ub_or_b2");
127 }
128 else {
129 use_border = LLVMBuildOr(bld->builder, b1, b2, "b1_or_b2");
130 }
131 }
132
133 /* convert x,y,z coords to linear offset from start of texture, in bytes */
134 lp_build_sample_offset(&bld->uint_coord_bld,
135 bld->format_desc,
136 x, y, z, y_stride, z_stride,
137 &offset, &i, &j);
138
139 if (use_border) {
140 /* If we can sample the border color, it means that texcoords may
141 * lie outside the bounds of the texture image. We need to do
142 * something to prevent reading out of bounds and causing a segfault.
143 *
144 * Simply AND the texture coords with !use_border. This will cause
145 * coords which are out of bounds to become zero. Zero's guaranteed
146 * to be inside the texture image.
147 */
148 offset = lp_build_andnot(&bld->uint_coord_bld, offset, use_border);
149 }
150
151 lp_build_fetch_rgba_soa(bld->builder,
152 bld->format_desc,
153 bld->texel_type,
154 data_ptr, offset,
155 i, j,
156 texel_out);
157
158 /*
159 * Note: if we find an app which frequently samples the texture border
160 * we might want to implement a true conditional here to avoid sampling
161 * the texture whenever possible (since that's quite a bit of code).
162 * Ex:
163 * if (use_border) {
164 * texel = border_color;
165 * }
166 * else {
167 * texel = sample_texture(coord);
168 * }
169 * As it is now, we always sample the texture, then selectively replace
170 * the texel color results with the border color.
171 */
172
173 if (use_border) {
174 /* select texel color or border color depending on use_border */
175 LLVMValueRef border_color_ptr =
176 bld->dynamic_state->border_color(bld->dynamic_state,
177 bld->builder, unit);
178 int chan;
179 for (chan = 0; chan < 4; chan++) {
180 LLVMValueRef border_chan =
181 lp_build_array_get(bld->builder, border_color_ptr,
182 lp_build_const_int32(chan));
183 LLVMValueRef border_chan_vec =
184 lp_build_broadcast_scalar(&bld->float_vec_bld, border_chan);
185 texel_out[chan] = lp_build_select(&bld->texel_bld, use_border,
186 border_chan_vec, texel_out[chan]);
187 }
188 }
189
190 apply_sampler_swizzle(bld, texel_out);
191 }
192
193
194 /**
195 * Helper to compute the mirror function for the PIPE_WRAP_MIRROR modes.
196 */
197 static LLVMValueRef
198 lp_build_coord_mirror(struct lp_build_sample_context *bld,
199 LLVMValueRef coord)
200 {
201 struct lp_build_context *coord_bld = &bld->coord_bld;
202 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
203 LLVMValueRef fract, flr, isOdd;
204
205 /* fract = coord - floor(coord) */
206 fract = lp_build_sub(coord_bld, coord, lp_build_floor(coord_bld, coord));
207
208 /* flr = ifloor(coord); */
209 flr = lp_build_ifloor(coord_bld, coord);
210
211 /* isOdd = flr & 1 */
212 isOdd = LLVMBuildAnd(bld->builder, flr, int_coord_bld->one, "");
213
214 /* make coord positive or negative depending on isOdd */
215 coord = lp_build_set_sign(coord_bld, fract, isOdd);
216
217 /* convert isOdd to float */
218 isOdd = lp_build_int_to_float(coord_bld, isOdd);
219
220 /* add isOdd to coord */
221 coord = lp_build_add(coord_bld, coord, isOdd);
222
223 return coord;
224 }
225
226
227 /**
228 * Build LLVM code for texture wrap mode for linear filtering.
229 * \param x0_out returns first integer texcoord
230 * \param x1_out returns second integer texcoord
231 * \param weight_out returns linear interpolation weight
232 */
233 static void
234 lp_build_sample_wrap_linear(struct lp_build_sample_context *bld,
235 LLVMValueRef coord,
236 LLVMValueRef length,
237 boolean is_pot,
238 unsigned wrap_mode,
239 LLVMValueRef *x0_out,
240 LLVMValueRef *x1_out,
241 LLVMValueRef *weight_out)
242 {
243 struct lp_build_context *coord_bld = &bld->coord_bld;
244 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
245 struct lp_build_context *uint_coord_bld = &bld->uint_coord_bld;
246 LLVMValueRef half = lp_build_const_vec(coord_bld->type, 0.5);
247 LLVMValueRef length_f = lp_build_int_to_float(coord_bld, length);
248 LLVMValueRef length_minus_one = lp_build_sub(uint_coord_bld, length, uint_coord_bld->one);
249 LLVMValueRef coord0, coord1, weight;
250
251 switch(wrap_mode) {
252 case PIPE_TEX_WRAP_REPEAT:
253 /* mul by size and subtract 0.5 */
254 coord = lp_build_mul(coord_bld, coord, length_f);
255 coord = lp_build_sub(coord_bld, coord, half);
256 /* convert to int */
257 coord0 = lp_build_ifloor(coord_bld, coord);
258 coord1 = lp_build_add(uint_coord_bld, coord0, uint_coord_bld->one);
259 /* compute lerp weight */
260 weight = lp_build_fract(coord_bld, coord);
261 /* repeat wrap */
262 if (is_pot) {
263 coord0 = LLVMBuildAnd(bld->builder, coord0, length_minus_one, "");
264 coord1 = LLVMBuildAnd(bld->builder, coord1, length_minus_one, "");
265 }
266 else {
267 /* Add a bias to the texcoord to handle negative coords */
268 LLVMValueRef bias = lp_build_mul_imm(uint_coord_bld, length, 1024);
269 coord0 = LLVMBuildAdd(bld->builder, coord0, bias, "");
270 coord1 = LLVMBuildAdd(bld->builder, coord1, bias, "");
271 coord0 = LLVMBuildURem(bld->builder, coord0, length, "");
272 coord1 = LLVMBuildURem(bld->builder, coord1, length, "");
273 }
274 break;
275
276 case PIPE_TEX_WRAP_CLAMP:
277 if (bld->static_state->normalized_coords) {
278 /* scale coord to length */
279 coord = lp_build_mul(coord_bld, coord, length_f);
280 }
281
282 /* clamp to [0, length] */
283 coord = lp_build_clamp(coord_bld, coord, coord_bld->zero, length_f);
284
285 coord = lp_build_sub(coord_bld, coord, half);
286
287 weight = lp_build_fract(coord_bld, coord);
288 coord0 = lp_build_ifloor(coord_bld, coord);
289 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
290 break;
291
292 case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
293 if (bld->static_state->normalized_coords) {
294 /* clamp to [0,1] */
295 coord = lp_build_clamp(coord_bld, coord, coord_bld->zero, coord_bld->one);
296 /* mul by tex 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 }
300 else {
301 LLVMValueRef min, max;
302 /* clamp to [0.5, length - 0.5] */
303 min = half;
304 max = lp_build_sub(coord_bld, length_f, min);
305 coord = lp_build_clamp(coord_bld, coord, min, max);
306 }
307 /* compute lerp weight */
308 weight = lp_build_fract(coord_bld, coord);
309 /* coord0 = floor(coord); */
310 coord0 = lp_build_ifloor(coord_bld, coord);
311 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
312 /* coord0 = max(coord0, 0) */
313 coord0 = lp_build_max(int_coord_bld, coord0, int_coord_bld->zero);
314 /* coord1 = min(coord1, length-1) */
315 coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one);
316 break;
317
318 case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
319 {
320 LLVMValueRef min, max;
321 if (bld->static_state->normalized_coords) {
322 /* scale coord to length */
323 coord = lp_build_mul(coord_bld, coord, length_f);
324 }
325 /* clamp to [-0.5, length + 0.5] */
326 min = lp_build_const_vec(coord_bld->type, -0.5F);
327 max = lp_build_sub(coord_bld, length_f, min);
328 coord = lp_build_clamp(coord_bld, coord, min, max);
329 coord = lp_build_sub(coord_bld, coord, half);
330 /* compute lerp weight */
331 weight = lp_build_fract(coord_bld, coord);
332 /* convert to int */
333 coord0 = lp_build_ifloor(coord_bld, coord);
334 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
335 }
336 break;
337
338 case PIPE_TEX_WRAP_MIRROR_REPEAT:
339 /* compute mirror function */
340 coord = lp_build_coord_mirror(bld, coord);
341
342 /* scale coord to length */
343 coord = lp_build_mul(coord_bld, coord, length_f);
344 coord = lp_build_sub(coord_bld, coord, half);
345
346 /* compute lerp weight */
347 weight = lp_build_fract(coord_bld, coord);
348
349 /* convert to int coords */
350 coord0 = lp_build_ifloor(coord_bld, coord);
351 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
352
353 /* coord0 = max(coord0, 0) */
354 coord0 = lp_build_max(int_coord_bld, coord0, int_coord_bld->zero);
355 /* coord1 = min(coord1, length-1) */
356 coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one);
357 break;
358
359 case PIPE_TEX_WRAP_MIRROR_CLAMP:
360 coord = lp_build_abs(coord_bld, coord);
361
362 if (bld->static_state->normalized_coords) {
363 /* scale coord to length */
364 coord = lp_build_mul(coord_bld, coord, length_f);
365 }
366
367 /* clamp to [0, length] */
368 coord = lp_build_min(coord_bld, coord, length_f);
369
370 coord = lp_build_sub(coord_bld, coord, half);
371
372 weight = lp_build_fract(coord_bld, coord);
373 coord0 = lp_build_ifloor(coord_bld, coord);
374 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
375 break;
376
377 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
378 {
379 LLVMValueRef min, max;
380
381 coord = lp_build_abs(coord_bld, coord);
382
383 if (bld->static_state->normalized_coords) {
384 /* scale coord to length */
385 coord = lp_build_mul(coord_bld, coord, length_f);
386 }
387
388 /* clamp to [0.5, length - 0.5] */
389 min = half;
390 max = lp_build_sub(coord_bld, length_f, min);
391 coord = lp_build_clamp(coord_bld, coord, min, max);
392
393 coord = lp_build_sub(coord_bld, coord, half);
394
395 weight = lp_build_fract(coord_bld, coord);
396 coord0 = lp_build_ifloor(coord_bld, coord);
397 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
398 }
399 break;
400
401 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
402 {
403 LLVMValueRef min, max;
404
405 coord = lp_build_abs(coord_bld, coord);
406
407 if (bld->static_state->normalized_coords) {
408 /* scale coord to length */
409 coord = lp_build_mul(coord_bld, coord, length_f);
410 }
411
412 /* clamp to [-0.5, length + 0.5] */
413 min = lp_build_negate(coord_bld, half);
414 max = lp_build_sub(coord_bld, length_f, min);
415 coord = lp_build_clamp(coord_bld, coord, min, max);
416
417 coord = lp_build_sub(coord_bld, coord, half);
418
419 weight = lp_build_fract(coord_bld, coord);
420 coord0 = lp_build_ifloor(coord_bld, coord);
421 coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
422 }
423 break;
424
425 default:
426 assert(0);
427 coord0 = NULL;
428 coord1 = NULL;
429 weight = NULL;
430 }
431
432 *x0_out = coord0;
433 *x1_out = coord1;
434 *weight_out = weight;
435 }
436
437
438 /**
439 * Build LLVM code for texture wrap mode for nearest filtering.
440 * \param coord the incoming texcoord (nominally in [0,1])
441 * \param length the texture size along one dimension, as int vector
442 * \param is_pot if TRUE, length is a power of two
443 * \param wrap_mode one of PIPE_TEX_WRAP_x
444 */
445 static LLVMValueRef
446 lp_build_sample_wrap_nearest(struct lp_build_sample_context *bld,
447 LLVMValueRef coord,
448 LLVMValueRef length,
449 boolean is_pot,
450 unsigned wrap_mode)
451 {
452 struct lp_build_context *coord_bld = &bld->coord_bld;
453 struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
454 struct lp_build_context *uint_coord_bld = &bld->uint_coord_bld;
455 LLVMValueRef length_f = lp_build_int_to_float(coord_bld, length);
456 LLVMValueRef length_minus_one = lp_build_sub(uint_coord_bld, length, uint_coord_bld->one);
457 LLVMValueRef icoord;
458
459 switch(wrap_mode) {
460 case PIPE_TEX_WRAP_REPEAT:
461 coord = lp_build_mul(coord_bld, coord, length_f);
462 icoord = lp_build_ifloor(coord_bld, coord);
463 if (is_pot)
464 icoord = LLVMBuildAnd(bld->builder, icoord, length_minus_one, "");
465 else {
466 /* Add a bias to the texcoord to handle negative coords */
467 LLVMValueRef bias = lp_build_mul_imm(uint_coord_bld, length, 1024);
468 icoord = LLVMBuildAdd(bld->builder, icoord, bias, "");
469 icoord = LLVMBuildURem(bld->builder, icoord, length, "");
470 }
471 break;
472
473 case PIPE_TEX_WRAP_CLAMP:
474 case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
475 if (bld->static_state->normalized_coords) {
476 /* scale coord to length */
477 coord = lp_build_mul(coord_bld, coord, length_f);
478 }
479
480 /* floor */
481 icoord = lp_build_ifloor(coord_bld, coord);
482
483 /* clamp to [0, length - 1]. */
484 icoord = lp_build_clamp(int_coord_bld, icoord, int_coord_bld->zero,
485 length_minus_one);
486 break;
487
488 case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
489 /* Note: this is the same as CLAMP_TO_EDGE, except min = -min */
490 {
491 LLVMValueRef min, max;
492
493 if (bld->static_state->normalized_coords) {
494 /* scale coord to length */
495 coord = lp_build_mul(coord_bld, coord, length_f);
496 }
497
498 icoord = lp_build_ifloor(coord_bld, coord);
499
500 /* clamp to [-1, length] */
501 min = lp_build_negate(int_coord_bld, int_coord_bld->one);
502 max = length;
503 icoord = lp_build_clamp(int_coord_bld, icoord, min, max);
504 }
505 break;
506
507 case PIPE_TEX_WRAP_MIRROR_REPEAT:
508 /* compute mirror function */
509 coord = lp_build_coord_mirror(bld, coord);
510
511 /* scale coord to length */
512 assert(bld->static_state->normalized_coords);
513 coord = lp_build_mul(coord_bld, coord, length_f);
514
515 icoord = lp_build_ifloor(coord_bld, coord);
516
517 /* clamp to [0, length - 1] */
518 icoord = lp_build_min(int_coord_bld, icoord, length_minus_one);
519 break;
520
521 case PIPE_TEX_WRAP_MIRROR_CLAMP:
522 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
523 coord = lp_build_abs(coord_bld, coord);
524
525 if (bld->static_state->normalized_coords) {
526 /* scale coord to length */
527 coord = lp_build_mul(coord_bld, coord, length_f);
528 }
529
530 icoord = lp_build_ifloor(coord_bld, coord);
531
532 /* clamp to [0, length - 1] */
533 icoord = lp_build_min(int_coord_bld, icoord, length_minus_one);
534 break;
535
536 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
537 coord = lp_build_abs(coord_bld, coord);
538
539 if (bld->static_state->normalized_coords) {
540 /* scale coord to length */
541 coord = lp_build_mul(coord_bld, coord, length_f);
542 }
543
544 icoord = lp_build_ifloor(coord_bld, coord);
545
546 /* clamp to [0, length] */
547 icoord = lp_build_min(int_coord_bld, icoord, length);
548 break;
549
550 default:
551 assert(0);
552 icoord = NULL;
553 }
554
555 return icoord;
556 }
557
558
559 /**
560 * Generate code to sample a mipmap level with nearest filtering.
561 * If sampling a cube texture, r = cube face in [0,5].
562 */
563 static void
564 lp_build_sample_image_nearest(struct lp_build_sample_context *bld,
565 unsigned unit,
566 LLVMValueRef width_vec,
567 LLVMValueRef height_vec,
568 LLVMValueRef depth_vec,
569 LLVMValueRef row_stride_vec,
570 LLVMValueRef img_stride_vec,
571 LLVMValueRef data_ptr,
572 LLVMValueRef s,
573 LLVMValueRef t,
574 LLVMValueRef r,
575 LLVMValueRef colors_out[4])
576 {
577 const int dims = texture_dims(bld->static_state->target);
578 LLVMValueRef x, y, z;
579
580 /*
581 * Compute integer texcoords.
582 */
583 x = lp_build_sample_wrap_nearest(bld, s, width_vec,
584 bld->static_state->pot_width,
585 bld->static_state->wrap_s);
586 lp_build_name(x, "tex.x.wrapped");
587
588 if (dims >= 2) {
589 y = lp_build_sample_wrap_nearest(bld, t, height_vec,
590 bld->static_state->pot_height,
591 bld->static_state->wrap_t);
592 lp_build_name(y, "tex.y.wrapped");
593
594 if (dims == 3) {
595 z = lp_build_sample_wrap_nearest(bld, r, depth_vec,
596 bld->static_state->pot_depth,
597 bld->static_state->wrap_r);
598 lp_build_name(z, "tex.z.wrapped");
599 }
600 else if (bld->static_state->target == PIPE_TEXTURE_CUBE) {
601 z = r;
602 }
603 else {
604 z = NULL;
605 }
606 }
607 else {
608 y = z = NULL;
609 }
610
611 /*
612 * Get texture colors.
613 */
614 lp_build_sample_texel_soa(bld, unit,
615 width_vec, height_vec, depth_vec,
616 x, y, z,
617 row_stride_vec, img_stride_vec,
618 data_ptr, colors_out);
619 }
620
621
622 /**
623 * Generate code to sample a mipmap level with linear filtering.
624 * If sampling a cube texture, r = cube face in [0,5].
625 */
626 static void
627 lp_build_sample_image_linear(struct lp_build_sample_context *bld,
628 unsigned unit,
629 LLVMValueRef width_vec,
630 LLVMValueRef height_vec,
631 LLVMValueRef depth_vec,
632 LLVMValueRef row_stride_vec,
633 LLVMValueRef img_stride_vec,
634 LLVMValueRef data_ptr,
635 LLVMValueRef s,
636 LLVMValueRef t,
637 LLVMValueRef r,
638 LLVMValueRef colors_out[4])
639 {
640 const int dims = texture_dims(bld->static_state->target);
641 LLVMValueRef x0, y0, z0, x1, y1, z1;
642 LLVMValueRef s_fpart, t_fpart, r_fpart;
643 LLVMValueRef neighbors[2][2][4];
644 int chan;
645
646 /*
647 * Compute integer texcoords.
648 */
649 lp_build_sample_wrap_linear(bld, s, width_vec,
650 bld->static_state->pot_width,
651 bld->static_state->wrap_s,
652 &x0, &x1, &s_fpart);
653 lp_build_name(x0, "tex.x0.wrapped");
654 lp_build_name(x1, "tex.x1.wrapped");
655
656 if (dims >= 2) {
657 lp_build_sample_wrap_linear(bld, t, height_vec,
658 bld->static_state->pot_height,
659 bld->static_state->wrap_t,
660 &y0, &y1, &t_fpart);
661 lp_build_name(y0, "tex.y0.wrapped");
662 lp_build_name(y1, "tex.y1.wrapped");
663
664 if (dims == 3) {
665 lp_build_sample_wrap_linear(bld, r, depth_vec,
666 bld->static_state->pot_depth,
667 bld->static_state->wrap_r,
668 &z0, &z1, &r_fpart);
669 lp_build_name(z0, "tex.z0.wrapped");
670 lp_build_name(z1, "tex.z1.wrapped");
671 }
672 else if (bld->static_state->target == PIPE_TEXTURE_CUBE) {
673 z0 = z1 = r; /* cube face */
674 r_fpart = NULL;
675 }
676 else {
677 z0 = z1 = NULL;
678 r_fpart = NULL;
679 }
680 }
681 else {
682 y0 = y1 = t_fpart = NULL;
683 z0 = z1 = r_fpart = NULL;
684 }
685
686 /*
687 * Get texture colors.
688 */
689 /* get x0/x1 texels */
690 lp_build_sample_texel_soa(bld, unit,
691 width_vec, height_vec, depth_vec,
692 x0, y0, z0,
693 row_stride_vec, img_stride_vec,
694 data_ptr, neighbors[0][0]);
695 lp_build_sample_texel_soa(bld, unit,
696 width_vec, height_vec, depth_vec,
697 x1, y0, z0,
698 row_stride_vec, img_stride_vec,
699 data_ptr, neighbors[0][1]);
700
701 if (dims == 1) {
702 /* Interpolate two samples from 1D image to produce one color */
703 for (chan = 0; chan < 4; chan++) {
704 colors_out[chan] = lp_build_lerp(&bld->texel_bld, s_fpart,
705 neighbors[0][0][chan],
706 neighbors[0][1][chan]);
707 }
708 }
709 else {
710 /* 2D/3D texture */
711 LLVMValueRef colors0[4];
712
713 /* get x0/x1 texels at y1 */
714 lp_build_sample_texel_soa(bld, unit,
715 width_vec, height_vec, depth_vec,
716 x0, y1, z0,
717 row_stride_vec, img_stride_vec,
718 data_ptr, neighbors[1][0]);
719 lp_build_sample_texel_soa(bld, unit,
720 width_vec, height_vec, depth_vec,
721 x1, y1, z0,
722 row_stride_vec, img_stride_vec,
723 data_ptr, neighbors[1][1]);
724
725 /* Bilinear interpolate the four samples from the 2D image / 3D slice */
726 for (chan = 0; chan < 4; chan++) {
727 colors0[chan] = lp_build_lerp_2d(&bld->texel_bld,
728 s_fpart, t_fpart,
729 neighbors[0][0][chan],
730 neighbors[0][1][chan],
731 neighbors[1][0][chan],
732 neighbors[1][1][chan]);
733 }
734
735 if (dims == 3) {
736 LLVMValueRef neighbors1[2][2][4];
737 LLVMValueRef colors1[4];
738
739 /* get x0/x1/y0/y1 texels at z1 */
740 lp_build_sample_texel_soa(bld, unit,
741 width_vec, height_vec, depth_vec,
742 x0, y0, z1,
743 row_stride_vec, img_stride_vec,
744 data_ptr, neighbors1[0][0]);
745 lp_build_sample_texel_soa(bld, unit,
746 width_vec, height_vec, depth_vec,
747 x1, y0, z1,
748 row_stride_vec, img_stride_vec,
749 data_ptr, neighbors1[0][1]);
750 lp_build_sample_texel_soa(bld, unit,
751 width_vec, height_vec, depth_vec,
752 x0, y1, z1,
753 row_stride_vec, img_stride_vec,
754 data_ptr, neighbors1[1][0]);
755 lp_build_sample_texel_soa(bld, unit,
756 width_vec, height_vec, depth_vec,
757 x1, y1, z1,
758 row_stride_vec, img_stride_vec,
759 data_ptr, neighbors1[1][1]);
760
761 /* Bilinear interpolate the four samples from the second Z slice */
762 for (chan = 0; chan < 4; chan++) {
763 colors1[chan] = lp_build_lerp_2d(&bld->texel_bld,
764 s_fpart, t_fpart,
765 neighbors1[0][0][chan],
766 neighbors1[0][1][chan],
767 neighbors1[1][0][chan],
768 neighbors1[1][1][chan]);
769 }
770
771 /* Linearly interpolate the two samples from the two 3D slices */
772 for (chan = 0; chan < 4; chan++) {
773 colors_out[chan] = lp_build_lerp(&bld->texel_bld,
774 r_fpart,
775 colors0[chan], colors1[chan]);
776 }
777 }
778 else {
779 /* 2D tex */
780 for (chan = 0; chan < 4; chan++) {
781 colors_out[chan] = colors0[chan];
782 }
783 }
784 }
785 }
786
787
788 /**
789 * Sample the texture/mipmap using given image filter and mip filter.
790 * data0_ptr and data1_ptr point to the two mipmap levels to sample
791 * from. width0/1_vec, height0/1_vec, depth0/1_vec indicate their sizes.
792 * If we're using nearest miplevel sampling the '1' values will be null/unused.
793 */
794 static void
795 lp_build_sample_mipmap(struct lp_build_sample_context *bld,
796 unsigned unit,
797 unsigned img_filter,
798 unsigned mip_filter,
799 LLVMValueRef s,
800 LLVMValueRef t,
801 LLVMValueRef r,
802 LLVMValueRef lod_fpart,
803 LLVMValueRef width0_vec,
804 LLVMValueRef width1_vec,
805 LLVMValueRef height0_vec,
806 LLVMValueRef height1_vec,
807 LLVMValueRef depth0_vec,
808 LLVMValueRef depth1_vec,
809 LLVMValueRef row_stride0_vec,
810 LLVMValueRef row_stride1_vec,
811 LLVMValueRef img_stride0_vec,
812 LLVMValueRef img_stride1_vec,
813 LLVMValueRef data_ptr0,
814 LLVMValueRef data_ptr1,
815 LLVMValueRef *colors_out)
816 {
817 LLVMValueRef colors0[4], colors1[4];
818 int chan;
819
820 if (img_filter == PIPE_TEX_FILTER_NEAREST) {
821 /* sample the first mipmap level */
822 lp_build_sample_image_nearest(bld, unit,
823 width0_vec, height0_vec, depth0_vec,
824 row_stride0_vec, img_stride0_vec,
825 data_ptr0, s, t, r, colors0);
826
827 if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
828 /* sample the second mipmap level */
829 lp_build_sample_image_nearest(bld, unit,
830 width1_vec, height1_vec, depth1_vec,
831 row_stride1_vec, img_stride1_vec,
832 data_ptr1, s, t, r, colors1);
833 }
834 }
835 else {
836 assert(img_filter == PIPE_TEX_FILTER_LINEAR);
837
838 /* sample the first mipmap level */
839 lp_build_sample_image_linear(bld, unit,
840 width0_vec, height0_vec, depth0_vec,
841 row_stride0_vec, img_stride0_vec,
842 data_ptr0, s, t, r, colors0);
843
844 if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
845 /* sample the second mipmap level */
846 lp_build_sample_image_linear(bld, unit,
847 width1_vec, height1_vec, depth1_vec,
848 row_stride1_vec, img_stride1_vec,
849 data_ptr1, s, t, r, colors1);
850 }
851 }
852
853 if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
854 /* interpolate samples from the two mipmap levels */
855 for (chan = 0; chan < 4; chan++) {
856 colors_out[chan] = lp_build_lerp(&bld->texel_bld, lod_fpart,
857 colors0[chan], colors1[chan]);
858 }
859 }
860 else {
861 /* use first/only level's colors */
862 for (chan = 0; chan < 4; chan++) {
863 colors_out[chan] = colors0[chan];
864 }
865 }
866 }
867
868
869
870 /**
871 * General texture sampling codegen.
872 * This function handles texture sampling for all texture targets (1D,
873 * 2D, 3D, cube) and all filtering modes.
874 */
875 static void
876 lp_build_sample_general(struct lp_build_sample_context *bld,
877 unsigned unit,
878 LLVMValueRef s,
879 LLVMValueRef t,
880 LLVMValueRef r,
881 const LLVMValueRef *ddx,
882 const LLVMValueRef *ddy,
883 LLVMValueRef lod_bias, /* optional */
884 LLVMValueRef explicit_lod, /* optional */
885 LLVMValueRef width,
886 LLVMValueRef height,
887 LLVMValueRef depth,
888 LLVMValueRef width_vec,
889 LLVMValueRef height_vec,
890 LLVMValueRef depth_vec,
891 LLVMValueRef row_stride_array,
892 LLVMValueRef img_stride_array,
893 LLVMValueRef data_array,
894 LLVMValueRef *colors_out)
895 {
896 struct lp_build_context *float_bld = &bld->float_bld;
897 const unsigned mip_filter = bld->static_state->min_mip_filter;
898 const unsigned min_filter = bld->static_state->min_img_filter;
899 const unsigned mag_filter = bld->static_state->mag_img_filter;
900 const int dims = texture_dims(bld->static_state->target);
901 LLVMValueRef lod = NULL, lod_fpart = NULL;
902 LLVMValueRef ilevel0, ilevel1 = NULL;
903 LLVMValueRef width0_vec = NULL, height0_vec = NULL, depth0_vec = NULL;
904 LLVMValueRef width1_vec = NULL, height1_vec = NULL, depth1_vec = NULL;
905 LLVMValueRef row_stride0_vec = NULL, row_stride1_vec = NULL;
906 LLVMValueRef img_stride0_vec = NULL, img_stride1_vec = NULL;
907 LLVMValueRef data_ptr0, data_ptr1 = NULL;
908 LLVMValueRef face_ddx[4], face_ddy[4];
909
910 /*
911 printf("%s mip %d min %d mag %d\n", __FUNCTION__,
912 mip_filter, min_filter, mag_filter);
913 */
914
915 /*
916 * Choose cube face, recompute texcoords and derivatives for the chosen face.
917 */
918 if (bld->static_state->target == PIPE_TEXTURE_CUBE) {
919 LLVMValueRef face, face_s, face_t;
920 lp_build_cube_lookup(bld, s, t, r, &face, &face_s, &face_t);
921 s = face_s; /* vec */
922 t = face_t; /* vec */
923 /* use 'r' to indicate cube face */
924 r = lp_build_broadcast_scalar(&bld->int_coord_bld, face); /* vec */
925
926 /* recompute ddx, ddy using the new (s,t) face texcoords */
927 face_ddx[0] = lp_build_ddx(&bld->coord_bld, s);
928 face_ddx[1] = lp_build_ddx(&bld->coord_bld, t);
929 face_ddx[2] = NULL;
930 face_ddx[3] = NULL;
931 face_ddy[0] = lp_build_ddy(&bld->coord_bld, s);
932 face_ddy[1] = lp_build_ddy(&bld->coord_bld, t);
933 face_ddy[2] = NULL;
934 face_ddy[3] = NULL;
935 ddx = face_ddx;
936 ddy = face_ddy;
937 }
938
939 /*
940 * Compute the level of detail (float).
941 */
942 if (min_filter != mag_filter ||
943 mip_filter != PIPE_TEX_MIPFILTER_NONE) {
944 /* Need to compute lod either to choose mipmap levels or to
945 * distinguish between minification/magnification with one mipmap level.
946 */
947 lod = lp_build_lod_selector(bld, unit, ddx, ddy,
948 lod_bias, explicit_lod,
949 width, height, depth);
950 }
951
952 /*
953 * Compute integer mipmap level(s) to fetch texels from.
954 */
955 if (mip_filter == PIPE_TEX_MIPFILTER_NONE) {
956 /* always use mip level 0 */
957 if (bld->static_state->target == PIPE_TEXTURE_CUBE) {
958 /* XXX this is a work-around for an apparent bug in LLVM 2.7.
959 * We should be able to set ilevel0 = const(0) but that causes
960 * bad x86 code to be emitted.
961 */
962 lod = lp_build_const_elem(bld->coord_bld.type, 0.0);
963 lp_build_nearest_mip_level(bld, unit, lod, &ilevel0);
964 }
965 else {
966 ilevel0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
967 }
968 }
969 else {
970 assert(lod);
971 if (mip_filter == PIPE_TEX_MIPFILTER_NEAREST) {
972 lp_build_nearest_mip_level(bld, unit, lod, &ilevel0);
973 }
974 else {
975 assert(mip_filter == PIPE_TEX_MIPFILTER_LINEAR);
976 lp_build_linear_mip_levels(bld, unit, lod, &ilevel0, &ilevel1,
977 &lod_fpart);
978 lod_fpart = lp_build_broadcast_scalar(&bld->coord_bld, lod_fpart);
979 }
980 }
981
982 /* compute image size(s) of source mipmap level(s) */
983 lp_build_mipmap_level_sizes(bld, dims, width_vec, height_vec, depth_vec,
984 ilevel0, ilevel1,
985 row_stride_array, img_stride_array,
986 &width0_vec, &width1_vec,
987 &height0_vec, &height1_vec,
988 &depth0_vec, &depth1_vec,
989 &row_stride0_vec, &row_stride1_vec,
990 &img_stride0_vec, &img_stride1_vec);
991
992 /*
993 * Get pointer(s) to image data for mipmap level(s).
994 */
995 data_ptr0 = lp_build_get_mipmap_level(bld, data_array, ilevel0);
996 if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
997 data_ptr1 = lp_build_get_mipmap_level(bld, data_array, ilevel1);
998 }
999
1000 /*
1001 * Get/interpolate texture colors.
1002 */
1003 if (min_filter == mag_filter) {
1004 /* no need to distinquish between minification and magnification */
1005 lp_build_sample_mipmap(bld, unit,
1006 min_filter, mip_filter, s, t, r, lod_fpart,
1007 width0_vec, width1_vec,
1008 height0_vec, height1_vec,
1009 depth0_vec, depth1_vec,
1010 row_stride0_vec, row_stride1_vec,
1011 img_stride0_vec, img_stride1_vec,
1012 data_ptr0, data_ptr1,
1013 colors_out);
1014 }
1015 else {
1016 /* Emit conditional to choose min image filter or mag image filter
1017 * depending on the lod being >0 or <= 0, respectively.
1018 */
1019 struct lp_build_flow_context *flow_ctx;
1020 struct lp_build_if_state if_ctx;
1021 LLVMValueRef minify;
1022
1023 flow_ctx = lp_build_flow_create(bld->builder);
1024 lp_build_flow_scope_begin(flow_ctx);
1025
1026 lp_build_flow_scope_declare(flow_ctx, &colors_out[0]);
1027 lp_build_flow_scope_declare(flow_ctx, &colors_out[1]);
1028 lp_build_flow_scope_declare(flow_ctx, &colors_out[2]);
1029 lp_build_flow_scope_declare(flow_ctx, &colors_out[3]);
1030
1031 /* minify = lod > 0.0 */
1032 minify = LLVMBuildFCmp(bld->builder, LLVMRealUGE,
1033 lod, float_bld->zero, "");
1034
1035 lp_build_if(&if_ctx, flow_ctx, bld->builder, minify);
1036 {
1037 /* Use the minification filter */
1038 lp_build_sample_mipmap(bld, unit,
1039 min_filter, mip_filter,
1040 s, t, r, lod_fpart,
1041 width0_vec, width1_vec,
1042 height0_vec, height1_vec,
1043 depth0_vec, depth1_vec,
1044 row_stride0_vec, row_stride1_vec,
1045 img_stride0_vec, img_stride1_vec,
1046 data_ptr0, data_ptr1,
1047 colors_out);
1048 }
1049 lp_build_else(&if_ctx);
1050 {
1051 /* Use the magnification filter */
1052 lp_build_sample_mipmap(bld, unit,
1053 mag_filter, mip_filter,
1054 s, t, r, lod_fpart,
1055 width0_vec, width1_vec,
1056 height0_vec, height1_vec,
1057 depth0_vec, depth1_vec,
1058 row_stride0_vec, row_stride1_vec,
1059 img_stride0_vec, img_stride1_vec,
1060 data_ptr0, data_ptr1,
1061 colors_out);
1062 }
1063 lp_build_endif(&if_ctx);
1064
1065 lp_build_flow_scope_end(flow_ctx);
1066 lp_build_flow_destroy(flow_ctx);
1067 }
1068 }
1069
1070
1071 /**
1072 * Do shadow test/comparison.
1073 * \param p the texcoord Z (aka R, aka P) component
1074 * \param texel the texel to compare against (use the X channel)
1075 */
1076 static void
1077 lp_build_sample_compare(struct lp_build_sample_context *bld,
1078 LLVMValueRef p,
1079 LLVMValueRef texel[4])
1080 {
1081 struct lp_build_context *texel_bld = &bld->texel_bld;
1082 LLVMValueRef res;
1083 const unsigned chan = 0;
1084
1085 if (bld->static_state->compare_mode == PIPE_TEX_COMPARE_NONE)
1086 return;
1087
1088 /* debug code */
1089 if (0) {
1090 LLVMValueRef indx = lp_build_const_int32(0);
1091 LLVMValueRef coord = LLVMBuildExtractElement(bld->builder, p, indx, "");
1092 LLVMValueRef tex = LLVMBuildExtractElement(bld->builder,
1093 texel[chan], indx, "");
1094 lp_build_printf(bld->builder, "shadow compare coord %f to texture %f\n",
1095 coord, tex);
1096 }
1097
1098 /* result = (p FUNC texel) ? 1 : 0 */
1099 res = lp_build_cmp(texel_bld, bld->static_state->compare_func,
1100 p, texel[chan]);
1101 res = lp_build_select(texel_bld, res, texel_bld->one, texel_bld->zero);
1102
1103 /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */
1104 texel[0] =
1105 texel[1] =
1106 texel[2] = res;
1107 texel[3] = texel_bld->one;
1108 }
1109
1110
1111 /**
1112 * Just set texels to white instead of actually sampling the texture.
1113 * For debugging.
1114 */
1115 void
1116 lp_build_sample_nop(struct lp_type type,
1117 LLVMValueRef texel_out[4])
1118 {
1119 LLVMValueRef one = lp_build_one(type);
1120 unsigned chan;
1121
1122 for (chan = 0; chan < 4; chan++) {
1123 texel_out[chan] = one;
1124 }
1125 }
1126
1127
1128 /**
1129 * Build texture sampling code.
1130 * 'texel' will return a vector of four LLVMValueRefs corresponding to
1131 * R, G, B, A.
1132 * \param type vector float type to use for coords, etc.
1133 * \param ddx partial derivatives of (s,t,r,q) with respect to x
1134 * \param ddy partial derivatives of (s,t,r,q) with respect to y
1135 */
1136 void
1137 lp_build_sample_soa(LLVMBuilderRef builder,
1138 const struct lp_sampler_static_state *static_state,
1139 struct lp_sampler_dynamic_state *dynamic_state,
1140 struct lp_type type,
1141 unsigned unit,
1142 unsigned num_coords,
1143 const LLVMValueRef *coords,
1144 const LLVMValueRef ddx[4],
1145 const LLVMValueRef ddy[4],
1146 LLVMValueRef lod_bias, /* optional */
1147 LLVMValueRef explicit_lod, /* optional */
1148 LLVMValueRef texel_out[4])
1149 {
1150 struct lp_build_sample_context bld;
1151 LLVMValueRef width, width_vec;
1152 LLVMValueRef height, height_vec;
1153 LLVMValueRef depth, depth_vec;
1154 LLVMValueRef row_stride_array, img_stride_array;
1155 LLVMValueRef data_array;
1156 LLVMValueRef s;
1157 LLVMValueRef t;
1158 LLVMValueRef r;
1159 struct lp_type float_vec_type;
1160
1161 if (0) {
1162 enum pipe_format fmt = static_state->format;
1163 debug_printf("Sample from %s\n", util_format_name(fmt));
1164 }
1165
1166 assert(type.floating);
1167
1168 /* Setup our build context */
1169 memset(&bld, 0, sizeof bld);
1170 bld.builder = builder;
1171 bld.static_state = static_state;
1172 bld.dynamic_state = dynamic_state;
1173 bld.format_desc = util_format_description(static_state->format);
1174
1175 bld.float_type = lp_type_float(32);
1176 bld.int_type = lp_type_int(32);
1177 bld.coord_type = type;
1178 bld.uint_coord_type = lp_uint_type(type);
1179 bld.int_coord_type = lp_int_type(type);
1180 bld.texel_type = type;
1181
1182 float_vec_type = lp_type_float_vec(32);
1183
1184 lp_build_context_init(&bld.float_bld, builder, bld.float_type);
1185 lp_build_context_init(&bld.float_vec_bld, builder, float_vec_type);
1186 lp_build_context_init(&bld.int_bld, builder, bld.int_type);
1187 lp_build_context_init(&bld.coord_bld, builder, bld.coord_type);
1188 lp_build_context_init(&bld.uint_coord_bld, builder, bld.uint_coord_type);
1189 lp_build_context_init(&bld.int_coord_bld, builder, bld.int_coord_type);
1190 lp_build_context_init(&bld.texel_bld, builder, bld.texel_type);
1191
1192 /* Get the dynamic state */
1193 width = dynamic_state->width(dynamic_state, builder, unit);
1194 height = dynamic_state->height(dynamic_state, builder, unit);
1195 depth = dynamic_state->depth(dynamic_state, builder, unit);
1196 row_stride_array = dynamic_state->row_stride(dynamic_state, builder, unit);
1197 img_stride_array = dynamic_state->img_stride(dynamic_state, builder, unit);
1198 data_array = dynamic_state->data_ptr(dynamic_state, builder, unit);
1199 /* Note that data_array is an array[level] of pointers to texture images */
1200
1201 s = coords[0];
1202 t = coords[1];
1203 r = coords[2];
1204
1205 /* width, height, depth as uint vectors */
1206 width_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, width);
1207 height_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, height);
1208 depth_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, depth);
1209
1210 if (0) {
1211 /* For debug: no-op texture sampling */
1212 lp_build_sample_nop(bld.texel_type, texel_out);
1213 }
1214 else if (util_format_fits_8unorm(bld.format_desc) &&
1215 lp_is_simple_wrap_mode(static_state->wrap_s) &&
1216 lp_is_simple_wrap_mode(static_state->wrap_t)) {
1217 /* do sampling/filtering with fixed pt arithmetic */
1218 lp_build_sample_aos(&bld, unit, s, t, r, ddx, ddy,
1219 lod_bias, explicit_lod,
1220 width, height, depth,
1221 width_vec, height_vec, depth_vec,
1222 row_stride_array, img_stride_array,
1223 data_array, texel_out);
1224 }
1225
1226 else {
1227 if ((gallivm_debug & GALLIVM_DEBUG_PERF) &&
1228 util_format_fits_8unorm(bld.format_desc)) {
1229 debug_printf("%s: using floating point linear filtering for %s\n",
1230 __FUNCTION__, bld.format_desc->short_name);
1231 debug_printf(" min_img %d mag_img %d mip %d wraps %d wrapt %d\n",
1232 static_state->min_img_filter,
1233 static_state->mag_img_filter,
1234 static_state->min_mip_filter,
1235 static_state->wrap_s,
1236 static_state->wrap_t);
1237 }
1238
1239 lp_build_sample_general(&bld, unit, s, t, r, ddx, ddy,
1240 lod_bias, explicit_lod,
1241 width, height, depth,
1242 width_vec, height_vec, depth_vec,
1243 row_stride_array, img_stride_array,
1244 data_array,
1245 texel_out);
1246 }
1247
1248 lp_build_sample_compare(&bld, r, texel_out);
1249 }