1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
30 * Texture sampling -- SoA.
32 * @author Jose Fonseca <jfonseca@vmware.com>
33 * @author Brian Paul <brianp@vmware.com>
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"
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
75 lp_build_sample_texel_soa(struct lp_build_sample_context
*bld
,
82 LLVMValueRef y_stride
,
83 LLVMValueRef z_stride
,
84 LLVMValueRef data_ptr
,
85 LLVMValueRef mipoffsets
,
86 LLVMValueRef texel_out
[4])
88 const struct lp_static_sampler_state
*static_state
= bld
->static_sampler_state
;
89 const unsigned dims
= bld
->dims
;
90 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
91 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
94 LLVMValueRef use_border
= NULL
;
96 /* use_border = x < 0 || x >= width || y < 0 || y >= height */
97 if (lp_sampler_wrap_mode_uses_border_color(static_state
->wrap_s
,
98 static_state
->min_img_filter
,
99 static_state
->mag_img_filter
)) {
101 b1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, x
, int_coord_bld
->zero
);
102 b2
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, x
, width
);
103 use_border
= LLVMBuildOr(builder
, b1
, b2
, "b1_or_b2");
107 lp_sampler_wrap_mode_uses_border_color(static_state
->wrap_t
,
108 static_state
->min_img_filter
,
109 static_state
->mag_img_filter
)) {
111 b1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, y
, int_coord_bld
->zero
);
112 b2
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, y
, height
);
114 use_border
= LLVMBuildOr(builder
, use_border
, b1
, "ub_or_b1");
115 use_border
= LLVMBuildOr(builder
, use_border
, b2
, "ub_or_b2");
118 use_border
= LLVMBuildOr(builder
, b1
, b2
, "b1_or_b2");
123 lp_sampler_wrap_mode_uses_border_color(static_state
->wrap_r
,
124 static_state
->min_img_filter
,
125 static_state
->mag_img_filter
)) {
127 b1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, z
, int_coord_bld
->zero
);
128 b2
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, z
, depth
);
130 use_border
= LLVMBuildOr(builder
, use_border
, b1
, "ub_or_b1");
131 use_border
= LLVMBuildOr(builder
, use_border
, b2
, "ub_or_b2");
134 use_border
= LLVMBuildOr(builder
, b1
, b2
, "b1_or_b2");
138 /* convert x,y,z coords to linear offset from start of texture, in bytes */
139 lp_build_sample_offset(&bld
->int_coord_bld
,
141 x
, y
, z
, y_stride
, z_stride
,
144 offset
= lp_build_add(&bld
->int_coord_bld
, offset
, mipoffsets
);
148 /* If we can sample the border color, it means that texcoords may
149 * lie outside the bounds of the texture image. We need to do
150 * something to prevent reading out of bounds and causing a segfault.
152 * Simply AND the texture coords with !use_border. This will cause
153 * coords which are out of bounds to become zero. Zero's guaranteed
154 * to be inside the texture image.
156 offset
= lp_build_andnot(&bld
->int_coord_bld
, offset
, use_border
);
159 lp_build_fetch_rgba_soa(bld
->gallivm
,
167 * Note: if we find an app which frequently samples the texture border
168 * we might want to implement a true conditional here to avoid sampling
169 * the texture whenever possible (since that's quite a bit of code).
172 * texel = border_color;
175 * texel = sample_texture(coord);
177 * As it is now, we always sample the texture, then selectively replace
178 * the texel color results with the border color.
182 /* select texel color or border color depending on use_border. */
183 const struct util_format_description
*format_desc
= bld
->format_desc
;
185 struct lp_type border_type
= bld
->texel_type
;
186 border_type
.length
= 4;
188 * Only replace channels which are actually present. The others should
189 * get optimized away eventually by sampler_view swizzle anyway but it's
192 for (chan
= 0; chan
< 4; chan
++) {
194 /* reverse-map channel... */
195 for (chan_s
= 0; chan_s
< 4; chan_s
++) {
196 if (chan_s
== format_desc
->swizzle
[chan
]) {
201 /* use the already clamped color */
202 LLVMValueRef idx
= lp_build_const_int32(bld
->gallivm
, chan
);
203 LLVMValueRef border_chan
;
205 border_chan
= lp_build_extract_broadcast(bld
->gallivm
,
208 bld
->border_color_clamped
,
210 texel_out
[chan
] = lp_build_select(&bld
->texel_bld
, use_border
,
211 border_chan
, texel_out
[chan
]);
219 * Helper to compute the mirror function for the PIPE_WRAP_MIRROR modes.
222 lp_build_coord_mirror(struct lp_build_sample_context
*bld
,
225 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
226 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
227 LLVMValueRef fract
, flr
, isOdd
;
229 lp_build_ifloor_fract(coord_bld
, coord
, &flr
, &fract
);
231 /* isOdd = flr & 1 */
232 isOdd
= LLVMBuildAnd(bld
->gallivm
->builder
, flr
, int_coord_bld
->one
, "");
234 /* make coord positive or negative depending on isOdd */
235 coord
= lp_build_set_sign(coord_bld
, fract
, isOdd
);
237 /* convert isOdd to float */
238 isOdd
= lp_build_int_to_float(coord_bld
, isOdd
);
240 /* add isOdd to coord */
241 coord
= lp_build_add(coord_bld
, coord
, isOdd
);
248 * Helper to compute the first coord and the weight for
249 * linear wrap repeat npot textures
252 lp_build_coord_repeat_npot_linear(struct lp_build_sample_context
*bld
,
253 LLVMValueRef coord_f
,
254 LLVMValueRef length_i
,
255 LLVMValueRef length_f
,
256 LLVMValueRef
*coord0_i
,
257 LLVMValueRef
*weight_f
)
259 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
260 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
261 LLVMValueRef half
= lp_build_const_vec(bld
->gallivm
, coord_bld
->type
, 0.5);
262 LLVMValueRef length_minus_one
= lp_build_sub(int_coord_bld
, length_i
,
265 /* wrap with normalized floats is just fract */
266 coord_f
= lp_build_fract(coord_bld
, coord_f
);
267 /* mul by size and subtract 0.5 */
268 coord_f
= lp_build_mul(coord_bld
, coord_f
, length_f
);
269 coord_f
= lp_build_sub(coord_bld
, coord_f
, half
);
271 * we avoided the 0.5/length division before the repeat wrap,
272 * now need to fix up edge cases with selects
274 /* convert to int, compute lerp weight */
275 lp_build_ifloor_fract(coord_bld
, coord_f
, coord0_i
, weight_f
);
276 mask
= lp_build_compare(int_coord_bld
->gallivm
, int_coord_bld
->type
,
277 PIPE_FUNC_LESS
, *coord0_i
, int_coord_bld
->zero
);
278 *coord0_i
= lp_build_select(int_coord_bld
, mask
, length_minus_one
, *coord0_i
);
283 * Build LLVM code for texture wrap mode for linear filtering.
284 * \param x0_out returns first integer texcoord
285 * \param x1_out returns second integer texcoord
286 * \param weight_out returns linear interpolation weight
289 lp_build_sample_wrap_linear(struct lp_build_sample_context
*bld
,
292 LLVMValueRef length_f
,
296 LLVMValueRef
*x0_out
,
297 LLVMValueRef
*x1_out
,
298 LLVMValueRef
*weight_out
)
300 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
301 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
302 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
303 LLVMValueRef half
= lp_build_const_vec(bld
->gallivm
, coord_bld
->type
, 0.5);
304 LLVMValueRef length_minus_one
= lp_build_sub(int_coord_bld
, length
, int_coord_bld
->one
);
305 LLVMValueRef coord0
, coord1
, weight
;
308 case PIPE_TEX_WRAP_REPEAT
:
310 /* mul by size and subtract 0.5 */
311 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
312 coord
= lp_build_sub(coord_bld
, coord
, half
);
314 offset
= lp_build_int_to_float(coord_bld
, offset
);
315 coord
= lp_build_add(coord_bld
, coord
, offset
);
317 /* convert to int, compute lerp weight */
318 lp_build_ifloor_fract(coord_bld
, coord
, &coord0
, &weight
);
319 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
321 coord0
= LLVMBuildAnd(builder
, coord0
, length_minus_one
, "");
322 coord1
= LLVMBuildAnd(builder
, coord1
, length_minus_one
, "");
327 offset
= lp_build_int_to_float(coord_bld
, offset
);
328 offset
= lp_build_div(coord_bld
, offset
, length_f
);
329 coord
= lp_build_add(coord_bld
, coord
, offset
);
331 lp_build_coord_repeat_npot_linear(bld
, coord
,
334 mask
= lp_build_compare(int_coord_bld
->gallivm
, int_coord_bld
->type
,
335 PIPE_FUNC_NOTEQUAL
, coord0
, length_minus_one
);
336 coord1
= LLVMBuildAnd(builder
,
337 lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
),
342 case PIPE_TEX_WRAP_CLAMP
:
343 if (bld
->static_sampler_state
->normalized_coords
) {
344 /* scale coord to length */
345 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
348 offset
= lp_build_int_to_float(coord_bld
, offset
);
349 coord
= lp_build_add(coord_bld
, coord
, offset
);
352 /* clamp to [0, length] */
353 coord
= lp_build_clamp(coord_bld
, coord
, coord_bld
->zero
, length_f
);
355 coord
= lp_build_sub(coord_bld
, coord
, half
);
357 /* convert to int, compute lerp weight */
358 lp_build_ifloor_fract(coord_bld
, coord
, &coord0
, &weight
);
359 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
362 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
364 struct lp_build_context abs_coord_bld
= bld
->coord_bld
;
365 abs_coord_bld
.type
.sign
= FALSE
;
367 if (bld
->static_sampler_state
->normalized_coords
) {
368 /* mul by tex size */
369 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
372 offset
= lp_build_int_to_float(coord_bld
, offset
);
373 coord
= lp_build_add(coord_bld
, coord
, offset
);
376 /* clamp to length max */
377 coord
= lp_build_min(coord_bld
, coord
, length_f
);
379 coord
= lp_build_sub(coord_bld
, coord
, half
);
380 /* clamp to [0, length - 0.5] */
381 coord
= lp_build_max(coord_bld
, coord
, coord_bld
->zero
);
382 /* convert to int, compute lerp weight */
383 lp_build_ifloor_fract(&abs_coord_bld
, coord
, &coord0
, &weight
);
384 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
385 /* coord1 = min(coord1, length-1) */
386 coord1
= lp_build_min(int_coord_bld
, coord1
, length_minus_one
);
390 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
391 if (bld
->static_sampler_state
->normalized_coords
) {
392 /* scale coord to length */
393 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
396 offset
= lp_build_int_to_float(coord_bld
, offset
);
397 coord
= lp_build_add(coord_bld
, coord
, offset
);
399 /* was: clamp to [-0.5, length + 0.5], then sub 0.5 */
400 /* can skip clamp (though might not work for very large coord values */
401 coord
= lp_build_sub(coord_bld
, coord
, half
);
402 /* convert to int, compute lerp weight */
403 lp_build_ifloor_fract(coord_bld
, coord
, &coord0
, &weight
);
404 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
407 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
409 offset
= lp_build_int_to_float(coord_bld
, offset
);
410 offset
= lp_build_div(coord_bld
, offset
, length_f
);
411 coord
= lp_build_add(coord_bld
, coord
, offset
);
413 /* compute mirror function */
414 coord
= lp_build_coord_mirror(bld
, coord
);
416 /* scale coord to length */
417 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
418 coord
= lp_build_sub(coord_bld
, coord
, half
);
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
);
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
);
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
);
436 offset
= lp_build_int_to_float(coord_bld
, offset
);
437 coord
= lp_build_add(coord_bld
, coord
, offset
);
439 coord
= lp_build_abs(coord_bld
, coord
);
441 /* clamp to [0, length] */
442 coord
= lp_build_min(coord_bld
, coord
, length_f
);
444 coord
= lp_build_sub(coord_bld
, coord
, half
);
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
);
451 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
453 struct lp_build_context abs_coord_bld
= bld
->coord_bld
;
454 abs_coord_bld
.type
.sign
= FALSE
;
456 if (bld
->static_sampler_state
->normalized_coords
) {
457 /* scale coord to length */
458 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
461 offset
= lp_build_int_to_float(coord_bld
, offset
);
462 coord
= lp_build_add(coord_bld
, coord
, offset
);
464 coord
= lp_build_abs(coord_bld
, coord
);
466 /* clamp to length max */
467 coord
= lp_build_min(coord_bld
, coord
, length_f
);
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
);
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
);
481 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
483 if (bld
->static_sampler_state
->normalized_coords
) {
484 /* scale coord to length */
485 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
488 offset
= lp_build_int_to_float(coord_bld
, offset
);
489 coord
= lp_build_add(coord_bld
, coord
, offset
);
491 coord
= lp_build_abs(coord_bld
, coord
);
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
);
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
);
513 *weight_out
= weight
;
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
527 lp_build_sample_wrap_nearest(struct lp_build_sample_context
*bld
,
530 LLVMValueRef length_f
,
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
);
542 case PIPE_TEX_WRAP_REPEAT
:
544 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
545 icoord
= lp_build_ifloor(coord_bld
, coord
);
547 icoord
= lp_build_add(int_coord_bld
, icoord
, offset
);
549 icoord
= LLVMBuildAnd(builder
, icoord
, length_minus_one
, "");
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
);
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
);
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
);
572 offset
= lp_build_int_to_float(coord_bld
, offset
);
573 coord
= lp_build_add(coord_bld
, coord
, offset
);
576 /* use itrunc instead since we clamp to 0 anyway */
577 icoord
= lp_build_itrunc(coord_bld
, coord
);
579 /* clamp to [0, length - 1]. */
580 icoord
= lp_build_clamp(int_coord_bld
, icoord
, int_coord_bld
->zero
,
584 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
585 if (bld
->static_sampler_state
->normalized_coords
) {
586 /* scale coord to length */
587 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
589 /* no clamp necessary, border masking will handle this */
590 icoord
= lp_build_ifloor(coord_bld
, coord
);
592 icoord
= lp_build_add(int_coord_bld
, icoord
, offset
);
596 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
598 offset
= lp_build_int_to_float(coord_bld
, offset
);
599 offset
= lp_build_div(coord_bld
, offset
, length_f
);
600 coord
= lp_build_add(coord_bld
, coord
, offset
);
602 /* compute mirror function */
603 coord
= lp_build_coord_mirror(bld
, coord
);
605 /* scale coord to length */
606 assert(bld
->static_sampler_state
->normalized_coords
);
607 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
609 /* itrunc == ifloor here */
610 icoord
= lp_build_itrunc(coord_bld
, coord
);
612 /* clamp to [0, length - 1] */
613 icoord
= lp_build_min(int_coord_bld
, icoord
, length_minus_one
);
616 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
617 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
618 if (bld
->static_sampler_state
->normalized_coords
) {
619 /* scale coord to length */
620 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
623 offset
= lp_build_int_to_float(coord_bld
, offset
);
624 coord
= lp_build_add(coord_bld
, coord
, offset
);
626 coord
= lp_build_abs(coord_bld
, coord
);
628 /* itrunc == ifloor here */
629 icoord
= lp_build_itrunc(coord_bld
, coord
);
631 /* clamp to [0, length - 1] */
632 icoord
= lp_build_min(int_coord_bld
, icoord
, length_minus_one
);
635 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
636 if (bld
->static_sampler_state
->normalized_coords
) {
637 /* scale coord to length */
638 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
641 offset
= lp_build_int_to_float(coord_bld
, offset
);
642 coord
= lp_build_add(coord_bld
, coord
, offset
);
644 coord
= lp_build_abs(coord_bld
, coord
);
646 /* itrunc == ifloor here */
647 icoord
= lp_build_itrunc(coord_bld
, coord
);
660 * Do shadow test/comparison.
661 * \param p shadow ref value
662 * \param texel the texel to compare against
665 lp_build_sample_comparefunc(struct lp_build_sample_context
*bld
,
669 struct lp_build_context
*texel_bld
= &bld
->texel_bld
;
673 //lp_build_print_value(bld->gallivm, "shadow cmp coord", p);
674 lp_build_print_value(bld
->gallivm
, "shadow cmp texel", texel
);
677 /* result = (p FUNC texel) ? 1 : 0 */
679 * honor d3d10 floating point rules here, which state that comparisons
680 * are ordered except NOT_EQUAL which is unordered.
682 if (bld
->static_sampler_state
->compare_func
!= PIPE_FUNC_NOTEQUAL
) {
683 res
= lp_build_cmp_ordered(texel_bld
, bld
->static_sampler_state
->compare_func
,
687 res
= lp_build_cmp(texel_bld
, bld
->static_sampler_state
->compare_func
,
695 * Generate code to sample a mipmap level with nearest filtering.
696 * If sampling a cube texture, r = cube face in [0,5].
699 lp_build_sample_image_nearest(struct lp_build_sample_context
*bld
,
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])
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
;
719 lp_build_extract_image_sizes(bld
,
723 &width_vec
, &height_vec
, &depth_vec
);
725 flt_size
= lp_build_int_to_float(&bld
->float_size_bld
, size
);
727 lp_build_extract_image_sizes(bld
,
728 &bld
->float_size_bld
,
731 &flt_width_vec
, &flt_height_vec
, &flt_depth_vec
);
734 * Compute integer texcoords.
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");
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");
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");
757 if (has_layer_coord(bld
->static_texture_state
->target
)) {
758 if (bld
->static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) {
759 /* add cube layer to face */
760 z
= lp_build_add(&bld
->int_coord_bld
, coords
[2], coords
[3]);
765 lp_build_name(z
, "tex.z.layer");
769 * Get texture colors.
771 lp_build_sample_texel_soa(bld
,
772 width_vec
, height_vec
, depth_vec
,
774 row_stride_vec
, img_stride_vec
,
775 data_ptr
, mipoffsets
, colors_out
);
777 if (bld
->static_sampler_state
->compare_mode
!= PIPE_TEX_COMPARE_NONE
) {
779 cmpval
= lp_build_sample_comparefunc(bld
, coords
[4], colors_out
[0]);
780 /* this is really just a AND 1.0, cmpval but llvm is clever enough */
781 colors_out
[0] = lp_build_select(&bld
->texel_bld
, cmpval
,
782 bld
->texel_bld
.one
, bld
->texel_bld
.zero
);
783 colors_out
[1] = colors_out
[2] = colors_out
[3] = colors_out
[0];
790 * Like a lerp, but inputs are 0/~0 masks, so can simplify slightly.
793 lp_build_masklerp(struct lp_build_context
*bld
,
798 struct gallivm_state
*gallivm
= bld
->gallivm
;
799 LLVMBuilderRef builder
= gallivm
->builder
;
800 LLVMValueRef weight2
;
802 weight2
= lp_build_sub(bld
, bld
->one
, weight
);
803 weight
= LLVMBuildBitCast(builder
, weight
,
804 lp_build_int_vec_type(gallivm
, bld
->type
), "");
805 weight2
= LLVMBuildBitCast(builder
, weight2
,
806 lp_build_int_vec_type(gallivm
, bld
->type
), "");
807 weight
= LLVMBuildAnd(builder
, weight
, mask1
, "");
808 weight2
= LLVMBuildAnd(builder
, weight2
, mask0
, "");
809 weight
= LLVMBuildBitCast(builder
, weight
, bld
->vec_type
, "");
810 weight2
= LLVMBuildBitCast(builder
, weight2
, bld
->vec_type
, "");
811 return lp_build_add(bld
, weight
, weight2
);
815 * Like a 2d lerp, but inputs are 0/~0 masks, so can simplify slightly.
818 lp_build_masklerp2d(struct lp_build_context
*bld
,
819 LLVMValueRef weight0
,
820 LLVMValueRef weight1
,
826 LLVMValueRef val0
= lp_build_masklerp(bld
, weight0
, mask00
, mask01
);
827 LLVMValueRef val1
= lp_build_masklerp(bld
, weight0
, mask10
, mask11
);
828 return lp_build_lerp(bld
, weight1
, val0
, val1
, 0);
832 * this is a bit excessive code for something OpenGL just recommends
833 * but does not require.
835 #define ACCURATE_CUBE_CORNERS 1
838 * Generate code to sample a mipmap level with linear filtering.
839 * If sampling a cube texture, r = cube face in [0,5].
840 * If linear_mask is present, only pixels having their mask set
841 * will receive linear filtering, the rest will use nearest.
844 lp_build_sample_image_linear(struct lp_build_sample_context
*bld
,
847 LLVMValueRef linear_mask
,
848 LLVMValueRef row_stride_vec
,
849 LLVMValueRef img_stride_vec
,
850 LLVMValueRef data_ptr
,
851 LLVMValueRef mipoffsets
,
852 LLVMValueRef
*coords
,
853 const LLVMValueRef
*offsets
,
854 LLVMValueRef colors_out
[4])
856 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
857 struct lp_build_context
*ivec_bld
= &bld
->int_coord_bld
;
858 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
859 struct lp_build_context
*texel_bld
= &bld
->texel_bld
;
860 const unsigned dims
= bld
->dims
;
861 LLVMValueRef width_vec
;
862 LLVMValueRef height_vec
;
863 LLVMValueRef depth_vec
;
864 LLVMValueRef flt_size
;
865 LLVMValueRef flt_width_vec
;
866 LLVMValueRef flt_height_vec
;
867 LLVMValueRef flt_depth_vec
;
868 LLVMValueRef fall_off
[4], have_corners
;
869 LLVMValueRef z1
= NULL
;
870 LLVMValueRef z00
= NULL
, z01
= NULL
, z10
= NULL
, z11
= NULL
;
871 LLVMValueRef x00
= NULL
, x01
= NULL
, x10
= NULL
, x11
= NULL
;
872 LLVMValueRef y00
= NULL
, y01
= NULL
, y10
= NULL
, y11
= NULL
;
873 LLVMValueRef s_fpart
, t_fpart
= NULL
, r_fpart
= NULL
;
874 LLVMValueRef xs
[4], ys
[4], zs
[4];
875 LLVMValueRef neighbors
[2][2][4];
876 int chan
, texel_index
;
877 boolean seamless_cube_filter
, accurate_cube_corners
;
879 seamless_cube_filter
= (bld
->static_texture_state
->target
== PIPE_TEXTURE_CUBE
||
880 bld
->static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) &&
881 bld
->static_sampler_state
->seamless_cube_map
;
883 * XXX I don't know how this is really supposed to work with gather. From GL
884 * spec wording (not gather specific) it sounds like the 4th missing texel
885 * should be an average of the other 3, hence for gather could return this.
886 * This is however NOT how the code here works, which just fixes up the
887 * weights used for filtering instead. And of course for gather there is
888 * no filter to tweak...
890 accurate_cube_corners
= ACCURATE_CUBE_CORNERS
&& seamless_cube_filter
&&
893 lp_build_extract_image_sizes(bld
,
897 &width_vec
, &height_vec
, &depth_vec
);
899 flt_size
= lp_build_int_to_float(&bld
->float_size_bld
, size
);
901 lp_build_extract_image_sizes(bld
,
902 &bld
->float_size_bld
,
905 &flt_width_vec
, &flt_height_vec
, &flt_depth_vec
);
908 * Compute integer texcoords.
911 if (!seamless_cube_filter
) {
912 lp_build_sample_wrap_linear(bld
, coords
[0], width_vec
,
913 flt_width_vec
, offsets
[0],
914 bld
->static_texture_state
->pot_width
,
915 bld
->static_sampler_state
->wrap_s
,
916 &x00
, &x01
, &s_fpart
);
917 lp_build_name(x00
, "tex.x0.wrapped");
918 lp_build_name(x01
, "tex.x1.wrapped");
923 lp_build_sample_wrap_linear(bld
, coords
[1], height_vec
,
924 flt_height_vec
, offsets
[1],
925 bld
->static_texture_state
->pot_height
,
926 bld
->static_sampler_state
->wrap_t
,
927 &y00
, &y10
, &t_fpart
);
928 lp_build_name(y00
, "tex.y0.wrapped");
929 lp_build_name(y10
, "tex.y1.wrapped");
934 lp_build_sample_wrap_linear(bld
, coords
[2], depth_vec
,
935 flt_depth_vec
, offsets
[2],
936 bld
->static_texture_state
->pot_depth
,
937 bld
->static_sampler_state
->wrap_r
,
938 &z00
, &z1
, &r_fpart
);
939 z01
= z10
= z11
= z00
;
940 lp_build_name(z00
, "tex.z0.wrapped");
941 lp_build_name(z1
, "tex.z1.wrapped");
944 if (has_layer_coord(bld
->static_texture_state
->target
)) {
945 if (bld
->static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) {
946 /* add cube layer to face */
947 z00
= z01
= z10
= z11
= z1
=
948 lp_build_add(&bld
->int_coord_bld
, coords
[2], coords
[3]);
951 z00
= z01
= z10
= z11
= z1
= coords
[2]; /* cube face or layer */
953 lp_build_name(z00
, "tex.z0.layer");
954 lp_build_name(z1
, "tex.z1.layer");
958 struct lp_build_if_state edge_if
;
960 LLVMValueRef new_faces
[4], new_xcoords
[4][2], new_ycoords
[4][2];
961 LLVMValueRef coord
, have_edge
, have_corner
;
962 LLVMValueRef fall_off_ym_notxm
, fall_off_ym_notxp
, fall_off_x
, fall_off_y
;
963 LLVMValueRef fall_off_yp_notxm
, fall_off_yp_notxp
;
964 LLVMValueRef x0
, x1
, y0
, y1
, y0_clamped
, y1_clamped
;
965 LLVMValueRef face
= coords
[2];
966 LLVMValueRef half
= lp_build_const_vec(bld
->gallivm
, coord_bld
->type
, 0.5f
);
967 LLVMValueRef length_minus_one
= lp_build_sub(ivec_bld
, width_vec
, ivec_bld
->one
);
968 /* XXX drop height calcs. Could (should) do this without seamless filtering too */
969 height_vec
= width_vec
;
970 flt_height_vec
= flt_width_vec
;
972 /* XXX the overflow logic is actually sort of duplicated with trilinear,
973 * since an overflow in one mip should also have a corresponding overflow
976 /* should always have normalized coords, and offsets are undefined */
977 assert(bld
->static_sampler_state
->normalized_coords
);
978 coord
= lp_build_mul(coord_bld
, coords
[0], flt_width_vec
);
979 /* instead of clamp, build mask if overflowed */
980 coord
= lp_build_sub(coord_bld
, coord
, half
);
981 /* convert to int, compute lerp weight */
982 /* not ideal with AVX (and no AVX2) */
983 lp_build_ifloor_fract(coord_bld
, coord
, &x0
, &s_fpart
);
984 x1
= lp_build_add(ivec_bld
, x0
, ivec_bld
->one
);
985 coord
= lp_build_mul(coord_bld
, coords
[1], flt_height_vec
);
986 coord
= lp_build_sub(coord_bld
, coord
, half
);
987 lp_build_ifloor_fract(coord_bld
, coord
, &y0
, &t_fpart
);
988 y1
= lp_build_add(ivec_bld
, y0
, ivec_bld
->one
);
990 fall_off
[0] = lp_build_cmp(ivec_bld
, PIPE_FUNC_LESS
, x0
, ivec_bld
->zero
);
991 fall_off
[1] = lp_build_cmp(ivec_bld
, PIPE_FUNC_GREATER
, x1
, length_minus_one
);
992 fall_off
[2] = lp_build_cmp(ivec_bld
, PIPE_FUNC_LESS
, y0
, ivec_bld
->zero
);
993 fall_off
[3] = lp_build_cmp(ivec_bld
, PIPE_FUNC_GREATER
, y1
, length_minus_one
);
995 fall_off_x
= lp_build_or(ivec_bld
, fall_off
[0], fall_off
[1]);
996 fall_off_y
= lp_build_or(ivec_bld
, fall_off
[2], fall_off
[3]);
997 have_edge
= lp_build_or(ivec_bld
, fall_off_x
, fall_off_y
);
998 have_edge
= lp_build_any_true_range(ivec_bld
, ivec_bld
->type
.length
, have_edge
);
1000 /* needed for accurate corner filtering branch later, rely on 0 init */
1001 int1t
= LLVMInt1TypeInContext(bld
->gallivm
->context
);
1002 have_corners
= lp_build_alloca(bld
->gallivm
, int1t
, "have_corner");
1004 for (texel_index
= 0; texel_index
< 4; texel_index
++) {
1005 xs
[texel_index
] = lp_build_alloca(bld
->gallivm
, ivec_bld
->vec_type
, "xs");
1006 ys
[texel_index
] = lp_build_alloca(bld
->gallivm
, ivec_bld
->vec_type
, "ys");
1007 zs
[texel_index
] = lp_build_alloca(bld
->gallivm
, ivec_bld
->vec_type
, "zs");
1010 lp_build_if(&edge_if
, bld
->gallivm
, have_edge
);
1012 have_corner
= lp_build_and(ivec_bld
, fall_off_x
, fall_off_y
);
1013 have_corner
= lp_build_any_true_range(ivec_bld
, ivec_bld
->type
.length
, have_corner
);
1014 LLVMBuildStore(builder
, have_corner
, have_corners
);
1017 * Need to feed clamped values here for cheap corner handling,
1018 * but only for y coord (as when falling off both edges we only
1019 * fall off the x one) - this should be sufficient.
1021 y0_clamped
= lp_build_max(ivec_bld
, y0
, ivec_bld
->zero
);
1022 y1_clamped
= lp_build_min(ivec_bld
, y1
, length_minus_one
);
1025 * Get all possible new coords.
1027 lp_build_cube_new_coords(ivec_bld
, face
,
1028 x0
, x1
, y0_clamped
, y1_clamped
,
1030 new_faces
, new_xcoords
, new_ycoords
);
1032 /* handle fall off x-, x+ direction */
1033 /* determine new coords, face (not both fall_off vars can be true at same time) */
1034 x00
= lp_build_select(ivec_bld
, fall_off
[0], new_xcoords
[0][0], x0
);
1035 y00
= lp_build_select(ivec_bld
, fall_off
[0], new_ycoords
[0][0], y0_clamped
);
1036 x10
= lp_build_select(ivec_bld
, fall_off
[0], new_xcoords
[0][1], x0
);
1037 y10
= lp_build_select(ivec_bld
, fall_off
[0], new_ycoords
[0][1], y1_clamped
);
1038 x01
= lp_build_select(ivec_bld
, fall_off
[1], new_xcoords
[1][0], x1
);
1039 y01
= lp_build_select(ivec_bld
, fall_off
[1], new_ycoords
[1][0], y0_clamped
);
1040 x11
= lp_build_select(ivec_bld
, fall_off
[1], new_xcoords
[1][1], x1
);
1041 y11
= lp_build_select(ivec_bld
, fall_off
[1], new_ycoords
[1][1], y1_clamped
);
1043 z00
= z10
= lp_build_select(ivec_bld
, fall_off
[0], new_faces
[0], face
);
1044 z01
= z11
= lp_build_select(ivec_bld
, fall_off
[1], new_faces
[1], face
);
1046 /* handle fall off y-, y+ direction */
1048 * Cheap corner logic: just hack up things so a texel doesn't fall
1049 * off both sides (which means filter weights will be wrong but we'll only
1050 * use valid texels in the filter).
1051 * This means however (y) coords must additionally be clamped (see above).
1052 * This corner handling should be fully OpenGL (but not d3d10) compliant.
1054 fall_off_ym_notxm
= lp_build_andnot(ivec_bld
, fall_off
[2], fall_off
[0]);
1055 fall_off_ym_notxp
= lp_build_andnot(ivec_bld
, fall_off
[2], fall_off
[1]);
1056 fall_off_yp_notxm
= lp_build_andnot(ivec_bld
, fall_off
[3], fall_off
[0]);
1057 fall_off_yp_notxp
= lp_build_andnot(ivec_bld
, fall_off
[3], fall_off
[1]);
1059 x00
= lp_build_select(ivec_bld
, fall_off_ym_notxm
, new_xcoords
[2][0], x00
);
1060 y00
= lp_build_select(ivec_bld
, fall_off_ym_notxm
, new_ycoords
[2][0], y00
);
1061 x01
= lp_build_select(ivec_bld
, fall_off_ym_notxp
, new_xcoords
[2][1], x01
);
1062 y01
= lp_build_select(ivec_bld
, fall_off_ym_notxp
, new_ycoords
[2][1], y01
);
1063 x10
= lp_build_select(ivec_bld
, fall_off_yp_notxm
, new_xcoords
[3][0], x10
);
1064 y10
= lp_build_select(ivec_bld
, fall_off_yp_notxm
, new_ycoords
[3][0], y10
);
1065 x11
= lp_build_select(ivec_bld
, fall_off_yp_notxp
, new_xcoords
[3][1], x11
);
1066 y11
= lp_build_select(ivec_bld
, fall_off_yp_notxp
, new_ycoords
[3][1], y11
);
1068 z00
= lp_build_select(ivec_bld
, fall_off_ym_notxm
, new_faces
[2], z00
);
1069 z01
= lp_build_select(ivec_bld
, fall_off_ym_notxp
, new_faces
[2], z01
);
1070 z10
= lp_build_select(ivec_bld
, fall_off_yp_notxm
, new_faces
[3], z10
);
1071 z11
= lp_build_select(ivec_bld
, fall_off_yp_notxp
, new_faces
[3], z11
);
1073 if (bld
->static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) {
1074 /* now can add cube layer to face (per sample) */
1075 z00
= lp_build_add(ivec_bld
, z00
, coords
[3]);
1076 z01
= lp_build_add(ivec_bld
, z01
, coords
[3]);
1077 z10
= lp_build_add(ivec_bld
, z10
, coords
[3]);
1078 z11
= lp_build_add(ivec_bld
, z11
, coords
[3]);
1081 LLVMBuildStore(builder
, x00
, xs
[0]);
1082 LLVMBuildStore(builder
, x01
, xs
[1]);
1083 LLVMBuildStore(builder
, x10
, xs
[2]);
1084 LLVMBuildStore(builder
, x11
, xs
[3]);
1085 LLVMBuildStore(builder
, y00
, ys
[0]);
1086 LLVMBuildStore(builder
, y01
, ys
[1]);
1087 LLVMBuildStore(builder
, y10
, ys
[2]);
1088 LLVMBuildStore(builder
, y11
, ys
[3]);
1089 LLVMBuildStore(builder
, z00
, zs
[0]);
1090 LLVMBuildStore(builder
, z01
, zs
[1]);
1091 LLVMBuildStore(builder
, z10
, zs
[2]);
1092 LLVMBuildStore(builder
, z11
, zs
[3]);
1094 lp_build_else(&edge_if
);
1096 LLVMBuildStore(builder
, x0
, xs
[0]);
1097 LLVMBuildStore(builder
, x1
, xs
[1]);
1098 LLVMBuildStore(builder
, x0
, xs
[2]);
1099 LLVMBuildStore(builder
, x1
, xs
[3]);
1100 LLVMBuildStore(builder
, y0
, ys
[0]);
1101 LLVMBuildStore(builder
, y0
, ys
[1]);
1102 LLVMBuildStore(builder
, y1
, ys
[2]);
1103 LLVMBuildStore(builder
, y1
, ys
[3]);
1104 if (bld
->static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) {
1105 LLVMValueRef cube_layer
= lp_build_add(ivec_bld
, face
, coords
[3]);
1106 LLVMBuildStore(builder
, cube_layer
, zs
[0]);
1107 LLVMBuildStore(builder
, cube_layer
, zs
[1]);
1108 LLVMBuildStore(builder
, cube_layer
, zs
[2]);
1109 LLVMBuildStore(builder
, cube_layer
, zs
[3]);
1112 LLVMBuildStore(builder
, face
, zs
[0]);
1113 LLVMBuildStore(builder
, face
, zs
[1]);
1114 LLVMBuildStore(builder
, face
, zs
[2]);
1115 LLVMBuildStore(builder
, face
, zs
[3]);
1118 lp_build_endif(&edge_if
);
1120 x00
= LLVMBuildLoad(builder
, xs
[0], "");
1121 x01
= LLVMBuildLoad(builder
, xs
[1], "");
1122 x10
= LLVMBuildLoad(builder
, xs
[2], "");
1123 x11
= LLVMBuildLoad(builder
, xs
[3], "");
1124 y00
= LLVMBuildLoad(builder
, ys
[0], "");
1125 y01
= LLVMBuildLoad(builder
, ys
[1], "");
1126 y10
= LLVMBuildLoad(builder
, ys
[2], "");
1127 y11
= LLVMBuildLoad(builder
, ys
[3], "");
1128 z00
= LLVMBuildLoad(builder
, zs
[0], "");
1129 z01
= LLVMBuildLoad(builder
, zs
[1], "");
1130 z10
= LLVMBuildLoad(builder
, zs
[2], "");
1131 z11
= LLVMBuildLoad(builder
, zs
[3], "");
1136 * Whack filter weights into place. Whatever texel had more weight is
1137 * the one which should have been selected by nearest filtering hence
1138 * just use 100% weight for it.
1140 struct lp_build_context
*c_bld
= &bld
->coord_bld
;
1141 LLVMValueRef w1_mask
, w1_weight
;
1142 LLVMValueRef half
= lp_build_const_vec(bld
->gallivm
, c_bld
->type
, 0.5f
);
1144 w1_mask
= lp_build_cmp(c_bld
, PIPE_FUNC_GREATER
, s_fpart
, half
);
1145 /* this select is really just a "and" */
1146 w1_weight
= lp_build_select(c_bld
, w1_mask
, c_bld
->one
, c_bld
->zero
);
1147 s_fpart
= lp_build_select(c_bld
, linear_mask
, s_fpart
, w1_weight
);
1149 w1_mask
= lp_build_cmp(c_bld
, PIPE_FUNC_GREATER
, t_fpart
, half
);
1150 w1_weight
= lp_build_select(c_bld
, w1_mask
, c_bld
->one
, c_bld
->zero
);
1151 t_fpart
= lp_build_select(c_bld
, linear_mask
, t_fpart
, w1_weight
);
1153 w1_mask
= lp_build_cmp(c_bld
, PIPE_FUNC_GREATER
, r_fpart
, half
);
1154 w1_weight
= lp_build_select(c_bld
, w1_mask
, c_bld
->one
, c_bld
->zero
);
1155 r_fpart
= lp_build_select(c_bld
, linear_mask
, r_fpart
, w1_weight
);
1161 * Get texture colors.
1163 /* get x0/x1 texels */
1164 lp_build_sample_texel_soa(bld
,
1165 width_vec
, height_vec
, depth_vec
,
1167 row_stride_vec
, img_stride_vec
,
1168 data_ptr
, mipoffsets
, neighbors
[0][0]);
1169 lp_build_sample_texel_soa(bld
,
1170 width_vec
, height_vec
, depth_vec
,
1172 row_stride_vec
, img_stride_vec
,
1173 data_ptr
, mipoffsets
, neighbors
[0][1]);
1177 if (bld
->static_sampler_state
->compare_mode
== PIPE_TEX_COMPARE_NONE
) {
1178 /* Interpolate two samples from 1D image to produce one color */
1179 for (chan
= 0; chan
< 4; chan
++) {
1180 colors_out
[chan
] = lp_build_lerp(texel_bld
, s_fpart
,
1181 neighbors
[0][0][chan
],
1182 neighbors
[0][1][chan
],
1187 LLVMValueRef cmpval0
, cmpval1
;
1188 cmpval0
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[0][0][0]);
1189 cmpval1
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[0][1][0]);
1190 /* simplified lerp, AND mask with weight and add */
1191 colors_out
[0] = lp_build_masklerp(texel_bld
, s_fpart
,
1193 colors_out
[1] = colors_out
[2] = colors_out
[3] = colors_out
[0];
1198 struct lp_build_if_state corner_if
;
1199 LLVMValueRef colors0
[4], colorss
[4];
1201 /* get x0/x1 texels at y1 */
1202 lp_build_sample_texel_soa(bld
,
1203 width_vec
, height_vec
, depth_vec
,
1205 row_stride_vec
, img_stride_vec
,
1206 data_ptr
, mipoffsets
, neighbors
[1][0]);
1207 lp_build_sample_texel_soa(bld
,
1208 width_vec
, height_vec
, depth_vec
,
1210 row_stride_vec
, img_stride_vec
,
1211 data_ptr
, mipoffsets
, neighbors
[1][1]);
1214 * To avoid having to duplicate linear_mask / fetch code use
1215 * another branch (with corner condition though edge would work
1218 if (accurate_cube_corners
) {
1219 LLVMValueRef w00
, w01
, w10
, w11
, wx0
, wy0
;
1220 LLVMValueRef c_weight
, c00
, c01
, c10
, c11
;
1221 LLVMValueRef have_corner
, one_third
, tmp
;
1223 colorss
[0] = lp_build_alloca(bld
->gallivm
, coord_bld
->vec_type
, "cs");
1224 colorss
[1] = lp_build_alloca(bld
->gallivm
, coord_bld
->vec_type
, "cs");
1225 colorss
[2] = lp_build_alloca(bld
->gallivm
, coord_bld
->vec_type
, "cs");
1226 colorss
[3] = lp_build_alloca(bld
->gallivm
, coord_bld
->vec_type
, "cs");
1228 have_corner
= LLVMBuildLoad(builder
, have_corners
, "");
1230 lp_build_if(&corner_if
, bld
->gallivm
, have_corner
);
1233 * we can't use standard 2d lerp as we need per-element weight
1234 * in case of corners, so just calculate bilinear result as
1235 * w00*s00 + w01*s01 + w10*s10 + w11*s11.
1236 * (This is actually less work than using 2d lerp, 7 vs. 9 instructions,
1237 * however calculating the weights needs another 6, so actually probably
1238 * not slower than 2d lerp only for 4 channels as weights only need
1239 * to be calculated once - of course fixing the weights has additional cost.)
1241 wx0
= lp_build_sub(coord_bld
, coord_bld
->one
, s_fpart
);
1242 wy0
= lp_build_sub(coord_bld
, coord_bld
->one
, t_fpart
);
1243 w00
= lp_build_mul(coord_bld
, wx0
, wy0
);
1244 w01
= lp_build_mul(coord_bld
, s_fpart
, wy0
);
1245 w10
= lp_build_mul(coord_bld
, wx0
, t_fpart
);
1246 w11
= lp_build_mul(coord_bld
, s_fpart
, t_fpart
);
1248 /* find corner weight */
1249 c00
= lp_build_and(ivec_bld
, fall_off
[0], fall_off
[2]);
1250 c_weight
= lp_build_select(coord_bld
, c00
, w00
, coord_bld
->zero
);
1251 c01
= lp_build_and(ivec_bld
, fall_off
[1], fall_off
[2]);
1252 c_weight
= lp_build_select(coord_bld
, c01
, w01
, c_weight
);
1253 c10
= lp_build_and(ivec_bld
, fall_off
[0], fall_off
[3]);
1254 c_weight
= lp_build_select(coord_bld
, c10
, w10
, c_weight
);
1255 c11
= lp_build_and(ivec_bld
, fall_off
[1], fall_off
[3]);
1256 c_weight
= lp_build_select(coord_bld
, c11
, w11
, c_weight
);
1259 * add 1/3 of the corner weight to each of the 3 other samples
1260 * and null out corner weight
1262 one_third
= lp_build_const_vec(bld
->gallivm
, coord_bld
->type
, 1.0f
/3.0f
);
1263 c_weight
= lp_build_mul(coord_bld
, c_weight
, one_third
);
1264 w00
= lp_build_add(coord_bld
, w00
, c_weight
);
1265 c00
= LLVMBuildBitCast(builder
, c00
, coord_bld
->vec_type
, "");
1266 w00
= lp_build_andnot(coord_bld
, w00
, c00
);
1267 w01
= lp_build_add(coord_bld
, w01
, c_weight
);
1268 c01
= LLVMBuildBitCast(builder
, c01
, coord_bld
->vec_type
, "");
1269 w01
= lp_build_andnot(coord_bld
, w01
, c01
);
1270 w10
= lp_build_add(coord_bld
, w10
, c_weight
);
1271 c10
= LLVMBuildBitCast(builder
, c10
, coord_bld
->vec_type
, "");
1272 w10
= lp_build_andnot(coord_bld
, w10
, c10
);
1273 w11
= lp_build_add(coord_bld
, w11
, c_weight
);
1274 c11
= LLVMBuildBitCast(builder
, c11
, coord_bld
->vec_type
, "");
1275 w11
= lp_build_andnot(coord_bld
, w11
, c11
);
1277 if (bld
->static_sampler_state
->compare_mode
== PIPE_TEX_COMPARE_NONE
) {
1278 for (chan
= 0; chan
< 4; chan
++) {
1279 colors0
[chan
] = lp_build_mul(coord_bld
, w00
, neighbors
[0][0][chan
]);
1280 tmp
= lp_build_mul(coord_bld
, w01
, neighbors
[0][1][chan
]);
1281 colors0
[chan
] = lp_build_add(coord_bld
, tmp
, colors0
[chan
]);
1282 tmp
= lp_build_mul(coord_bld
, w10
, neighbors
[1][0][chan
]);
1283 colors0
[chan
] = lp_build_add(coord_bld
, tmp
, colors0
[chan
]);
1284 tmp
= lp_build_mul(coord_bld
, w11
, neighbors
[1][1][chan
]);
1285 colors0
[chan
] = lp_build_add(coord_bld
, tmp
, colors0
[chan
]);
1289 LLVMValueRef cmpval00
, cmpval01
, cmpval10
, cmpval11
;
1290 cmpval00
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[0][0][0]);
1291 cmpval01
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[0][1][0]);
1292 cmpval10
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[1][0][0]);
1293 cmpval11
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[1][1][0]);
1294 /* inputs to interpolation are just masks so just add masked weights together */
1295 cmpval00
= LLVMBuildBitCast(builder
, cmpval00
, coord_bld
->vec_type
, "");
1296 cmpval01
= LLVMBuildBitCast(builder
, cmpval01
, coord_bld
->vec_type
, "");
1297 cmpval10
= LLVMBuildBitCast(builder
, cmpval10
, coord_bld
->vec_type
, "");
1298 cmpval11
= LLVMBuildBitCast(builder
, cmpval11
, coord_bld
->vec_type
, "");
1299 colors0
[0] = lp_build_and(coord_bld
, w00
, cmpval00
);
1300 tmp
= lp_build_and(coord_bld
, w01
, cmpval01
);
1301 colors0
[0] = lp_build_add(coord_bld
, tmp
, colors0
[0]);
1302 tmp
= lp_build_and(coord_bld
, w10
, cmpval10
);
1303 colors0
[0] = lp_build_add(coord_bld
, tmp
, colors0
[0]);
1304 tmp
= lp_build_and(coord_bld
, w11
, cmpval11
);
1305 colors0
[0] = lp_build_add(coord_bld
, tmp
, colors0
[0]);
1306 colors0
[1] = colors0
[2] = colors0
[3] = colors0
[0];
1309 LLVMBuildStore(builder
, colors0
[0], colorss
[0]);
1310 LLVMBuildStore(builder
, colors0
[1], colorss
[1]);
1311 LLVMBuildStore(builder
, colors0
[2], colorss
[2]);
1312 LLVMBuildStore(builder
, colors0
[3], colorss
[3]);
1314 lp_build_else(&corner_if
);
1317 if (bld
->static_sampler_state
->compare_mode
== PIPE_TEX_COMPARE_NONE
) {
1320 * Just assign the red channel (no component selection yet).
1321 * This is a bit hackish, we usually do the swizzle at the
1322 * end of sampling (much less values to swizzle), but this
1323 * obviously cannot work when using gather.
1325 unsigned chan_swiz
= bld
->static_texture_state
->swizzle_r
;
1326 colors0
[0] = lp_build_swizzle_soa_channel(texel_bld
,
1329 colors0
[1] = lp_build_swizzle_soa_channel(texel_bld
,
1332 colors0
[2] = lp_build_swizzle_soa_channel(texel_bld
,
1335 colors0
[3] = lp_build_swizzle_soa_channel(texel_bld
,
1340 /* Bilinear interpolate the four samples from the 2D image / 3D slice */
1341 for (chan
= 0; chan
< 4; chan
++) {
1342 colors0
[chan
] = lp_build_lerp_2d(texel_bld
,
1344 neighbors
[0][0][chan
],
1345 neighbors
[0][1][chan
],
1346 neighbors
[1][0][chan
],
1347 neighbors
[1][1][chan
],
1353 LLVMValueRef cmpval00
, cmpval01
, cmpval10
, cmpval11
;
1354 cmpval00
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[0][0][0]);
1355 cmpval01
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[0][1][0]);
1356 cmpval10
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[1][0][0]);
1357 cmpval11
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[1][1][0]);
1360 /* more hacks for swizzling, should be X, ONE or ZERO... */
1361 unsigned chan_swiz
= bld
->static_texture_state
->swizzle_r
;
1362 if (chan_swiz
<= PIPE_SWIZZLE_ALPHA
) {
1363 colors0
[0] = lp_build_select(texel_bld
, cmpval10
,
1364 texel_bld
->one
, texel_bld
->zero
);
1365 colors0
[1] = lp_build_select(texel_bld
, cmpval11
,
1366 texel_bld
->one
, texel_bld
->zero
);
1367 colors0
[2] = lp_build_select(texel_bld
, cmpval01
,
1368 texel_bld
->one
, texel_bld
->zero
);
1369 colors0
[3] = lp_build_select(texel_bld
, cmpval00
,
1370 texel_bld
->one
, texel_bld
->zero
);
1372 else if (chan_swiz
== PIPE_SWIZZLE_ZERO
) {
1373 colors0
[0] = colors0
[1] = colors0
[2] = colors0
[3] =
1377 colors0
[0] = colors0
[1] = colors0
[2] = colors0
[3] =
1382 colors0
[0] = lp_build_masklerp2d(texel_bld
, s_fpart
, t_fpart
,
1383 cmpval00
, cmpval01
, cmpval10
, cmpval11
);
1384 colors0
[1] = colors0
[2] = colors0
[3] = colors0
[0];
1388 if (accurate_cube_corners
) {
1389 LLVMBuildStore(builder
, colors0
[0], colorss
[0]);
1390 LLVMBuildStore(builder
, colors0
[1], colorss
[1]);
1391 LLVMBuildStore(builder
, colors0
[2], colorss
[2]);
1392 LLVMBuildStore(builder
, colors0
[3], colorss
[3]);
1394 lp_build_endif(&corner_if
);
1396 colors0
[0] = LLVMBuildLoad(builder
, colorss
[0], "");
1397 colors0
[1] = LLVMBuildLoad(builder
, colorss
[1], "");
1398 colors0
[2] = LLVMBuildLoad(builder
, colorss
[2], "");
1399 colors0
[3] = LLVMBuildLoad(builder
, colorss
[3], "");
1403 LLVMValueRef neighbors1
[2][2][4];
1404 LLVMValueRef colors1
[4];
1408 /* get x0/x1/y0/y1 texels at z1 */
1409 lp_build_sample_texel_soa(bld
,
1410 width_vec
, height_vec
, depth_vec
,
1412 row_stride_vec
, img_stride_vec
,
1413 data_ptr
, mipoffsets
, neighbors1
[0][0]);
1414 lp_build_sample_texel_soa(bld
,
1415 width_vec
, height_vec
, depth_vec
,
1417 row_stride_vec
, img_stride_vec
,
1418 data_ptr
, mipoffsets
, neighbors1
[0][1]);
1419 lp_build_sample_texel_soa(bld
,
1420 width_vec
, height_vec
, depth_vec
,
1422 row_stride_vec
, img_stride_vec
,
1423 data_ptr
, mipoffsets
, neighbors1
[1][0]);
1424 lp_build_sample_texel_soa(bld
,
1425 width_vec
, height_vec
, depth_vec
,
1427 row_stride_vec
, img_stride_vec
,
1428 data_ptr
, mipoffsets
, neighbors1
[1][1]);
1430 if (bld
->static_sampler_state
->compare_mode
== PIPE_TEX_COMPARE_NONE
) {
1431 /* Bilinear interpolate the four samples from the second Z slice */
1432 for (chan
= 0; chan
< 4; chan
++) {
1433 colors1
[chan
] = lp_build_lerp_2d(texel_bld
,
1435 neighbors1
[0][0][chan
],
1436 neighbors1
[0][1][chan
],
1437 neighbors1
[1][0][chan
],
1438 neighbors1
[1][1][chan
],
1441 /* Linearly interpolate the two samples from the two 3D slices */
1442 for (chan
= 0; chan
< 4; chan
++) {
1443 colors_out
[chan
] = lp_build_lerp(texel_bld
,
1445 colors0
[chan
], colors1
[chan
],
1450 LLVMValueRef cmpval00
, cmpval01
, cmpval10
, cmpval11
;
1451 cmpval00
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[0][0][0]);
1452 cmpval01
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[0][1][0]);
1453 cmpval10
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[1][0][0]);
1454 cmpval11
= lp_build_sample_comparefunc(bld
, coords
[4], neighbors
[1][1][0]);
1455 colors1
[0] = lp_build_masklerp2d(texel_bld
, s_fpart
, t_fpart
,
1456 cmpval00
, cmpval01
, cmpval10
, cmpval11
);
1457 /* Linearly interpolate the two samples from the two 3D slices */
1458 colors_out
[0] = lp_build_lerp(texel_bld
,
1460 colors0
[0], colors1
[0],
1462 colors_out
[1] = colors_out
[2] = colors_out
[3] = colors_out
[0];
1467 for (chan
= 0; chan
< 4; chan
++) {
1468 colors_out
[chan
] = colors0
[chan
];
1476 * Sample the texture/mipmap using given image filter and mip filter.
1477 * ilevel0 and ilevel1 indicate the two mipmap levels to sample
1478 * from (vectors or scalars).
1479 * If we're using nearest miplevel sampling the '1' values will be null/unused.
1482 lp_build_sample_mipmap(struct lp_build_sample_context
*bld
,
1483 unsigned img_filter
,
1484 unsigned mip_filter
,
1486 LLVMValueRef
*coords
,
1487 const LLVMValueRef
*offsets
,
1488 LLVMValueRef ilevel0
,
1489 LLVMValueRef ilevel1
,
1490 LLVMValueRef lod_fpart
,
1491 LLVMValueRef
*colors_out
)
1493 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
1494 LLVMValueRef size0
= NULL
;
1495 LLVMValueRef size1
= NULL
;
1496 LLVMValueRef row_stride0_vec
= NULL
;
1497 LLVMValueRef row_stride1_vec
= NULL
;
1498 LLVMValueRef img_stride0_vec
= NULL
;
1499 LLVMValueRef img_stride1_vec
= NULL
;
1500 LLVMValueRef data_ptr0
= NULL
;
1501 LLVMValueRef data_ptr1
= NULL
;
1502 LLVMValueRef mipoff0
= NULL
;
1503 LLVMValueRef mipoff1
= NULL
;
1504 LLVMValueRef colors0
[4], colors1
[4];
1507 /* sample the first mipmap level */
1508 lp_build_mipmap_level_sizes(bld
, ilevel0
,
1510 &row_stride0_vec
, &img_stride0_vec
);
1511 if (bld
->num_mips
== 1) {
1512 data_ptr0
= lp_build_get_mipmap_level(bld
, ilevel0
);
1515 /* This path should work for num_lods 1 too but slightly less efficient */
1516 data_ptr0
= bld
->base_ptr
;
1517 mipoff0
= lp_build_get_mip_offsets(bld
, ilevel0
);
1519 if (img_filter
== PIPE_TEX_FILTER_NEAREST
) {
1520 lp_build_sample_image_nearest(bld
, size0
,
1521 row_stride0_vec
, img_stride0_vec
,
1522 data_ptr0
, mipoff0
, coords
, offsets
,
1526 assert(img_filter
== PIPE_TEX_FILTER_LINEAR
);
1527 lp_build_sample_image_linear(bld
, is_gather
, size0
, NULL
,
1528 row_stride0_vec
, img_stride0_vec
,
1529 data_ptr0
, mipoff0
, coords
, offsets
,
1533 /* Store the first level's colors in the output variables */
1534 for (chan
= 0; chan
< 4; chan
++) {
1535 LLVMBuildStore(builder
, colors0
[chan
], colors_out
[chan
]);
1538 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
1539 struct lp_build_if_state if_ctx
;
1540 LLVMValueRef need_lerp
;
1542 /* need_lerp = lod_fpart > 0 */
1543 if (bld
->num_lods
== 1) {
1544 need_lerp
= LLVMBuildFCmp(builder
, LLVMRealUGT
,
1545 lod_fpart
, bld
->lodf_bld
.zero
,
1550 * We'll do mip filtering if any of the quads (or individual
1551 * pixel in case of per-pixel lod) need it.
1552 * It might be better to split the vectors here and only fetch/filter
1553 * quads which need it (if there's one lod per quad).
1555 need_lerp
= lp_build_compare(bld
->gallivm
, bld
->lodf_bld
.type
,
1557 lod_fpart
, bld
->lodf_bld
.zero
);
1558 need_lerp
= lp_build_any_true_range(&bld
->lodi_bld
, bld
->num_lods
, need_lerp
);
1561 lp_build_if(&if_ctx
, bld
->gallivm
, need_lerp
);
1564 * We unfortunately need to clamp lod_fpart here since we can get
1565 * negative values which would screw up filtering if not all
1566 * lod_fpart values have same sign.
1568 lod_fpart
= lp_build_max(&bld
->lodf_bld
, lod_fpart
,
1569 bld
->lodf_bld
.zero
);
1570 /* sample the second mipmap level */
1571 lp_build_mipmap_level_sizes(bld
, ilevel1
,
1573 &row_stride1_vec
, &img_stride1_vec
);
1574 if (bld
->num_mips
== 1) {
1575 data_ptr1
= lp_build_get_mipmap_level(bld
, ilevel1
);
1578 data_ptr1
= bld
->base_ptr
;
1579 mipoff1
= lp_build_get_mip_offsets(bld
, ilevel1
);
1581 if (img_filter
== PIPE_TEX_FILTER_NEAREST
) {
1582 lp_build_sample_image_nearest(bld
, size1
,
1583 row_stride1_vec
, img_stride1_vec
,
1584 data_ptr1
, mipoff1
, coords
, offsets
,
1588 lp_build_sample_image_linear(bld
, FALSE
, size1
, NULL
,
1589 row_stride1_vec
, img_stride1_vec
,
1590 data_ptr1
, mipoff1
, coords
, offsets
,
1594 /* interpolate samples from the two mipmap levels */
1596 if (bld
->num_lods
!= bld
->coord_type
.length
)
1597 lod_fpart
= lp_build_unpack_broadcast_aos_scalars(bld
->gallivm
,
1599 bld
->texel_bld
.type
,
1602 for (chan
= 0; chan
< 4; chan
++) {
1603 colors0
[chan
] = lp_build_lerp(&bld
->texel_bld
, lod_fpart
,
1604 colors0
[chan
], colors1
[chan
],
1606 LLVMBuildStore(builder
, colors0
[chan
], colors_out
[chan
]);
1609 lp_build_endif(&if_ctx
);
1615 * Sample the texture/mipmap using given mip filter, and using
1616 * both nearest and linear filtering at the same time depending
1618 * lod can be per quad but linear_mask is always per pixel.
1619 * ilevel0 and ilevel1 indicate the two mipmap levels to sample
1620 * from (vectors or scalars).
1621 * If we're using nearest miplevel sampling the '1' values will be null/unused.
1624 lp_build_sample_mipmap_both(struct lp_build_sample_context
*bld
,
1625 LLVMValueRef linear_mask
,
1626 unsigned mip_filter
,
1627 LLVMValueRef
*coords
,
1628 const LLVMValueRef
*offsets
,
1629 LLVMValueRef ilevel0
,
1630 LLVMValueRef ilevel1
,
1631 LLVMValueRef lod_fpart
,
1632 LLVMValueRef lod_positive
,
1633 LLVMValueRef
*colors_out
)
1635 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
1636 LLVMValueRef size0
= NULL
;
1637 LLVMValueRef size1
= NULL
;
1638 LLVMValueRef row_stride0_vec
= NULL
;
1639 LLVMValueRef row_stride1_vec
= NULL
;
1640 LLVMValueRef img_stride0_vec
= NULL
;
1641 LLVMValueRef img_stride1_vec
= NULL
;
1642 LLVMValueRef data_ptr0
= NULL
;
1643 LLVMValueRef data_ptr1
= NULL
;
1644 LLVMValueRef mipoff0
= NULL
;
1645 LLVMValueRef mipoff1
= NULL
;
1646 LLVMValueRef colors0
[4], colors1
[4];
1649 /* sample the first mipmap level */
1650 lp_build_mipmap_level_sizes(bld
, ilevel0
,
1652 &row_stride0_vec
, &img_stride0_vec
);
1653 if (bld
->num_mips
== 1) {
1654 data_ptr0
= lp_build_get_mipmap_level(bld
, ilevel0
);
1657 /* This path should work for num_lods 1 too but slightly less efficient */
1658 data_ptr0
= bld
->base_ptr
;
1659 mipoff0
= lp_build_get_mip_offsets(bld
, ilevel0
);
1662 lp_build_sample_image_linear(bld
, FALSE
, size0
, linear_mask
,
1663 row_stride0_vec
, img_stride0_vec
,
1664 data_ptr0
, mipoff0
, coords
, offsets
,
1667 /* Store the first level's colors in the output variables */
1668 for (chan
= 0; chan
< 4; chan
++) {
1669 LLVMBuildStore(builder
, colors0
[chan
], colors_out
[chan
]);
1672 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
1673 struct lp_build_if_state if_ctx
;
1674 LLVMValueRef need_lerp
;
1677 * We'll do mip filtering if any of the quads (or individual
1678 * pixel in case of per-pixel lod) need it.
1679 * Note using lod_positive here not lod_fpart since it may be the same
1680 * condition as that used in the outer "if" in the caller hence llvm
1681 * should be able to merge the branches in this case.
1683 need_lerp
= lp_build_any_true_range(&bld
->lodi_bld
, bld
->num_lods
, lod_positive
);
1685 lp_build_if(&if_ctx
, bld
->gallivm
, need_lerp
);
1688 * We unfortunately need to clamp lod_fpart here since we can get
1689 * negative values which would screw up filtering if not all
1690 * lod_fpart values have same sign.
1692 lod_fpart
= lp_build_max(&bld
->lodf_bld
, lod_fpart
,
1693 bld
->lodf_bld
.zero
);
1694 /* sample the second mipmap level */
1695 lp_build_mipmap_level_sizes(bld
, ilevel1
,
1697 &row_stride1_vec
, &img_stride1_vec
);
1698 if (bld
->num_mips
== 1) {
1699 data_ptr1
= lp_build_get_mipmap_level(bld
, ilevel1
);
1702 data_ptr1
= bld
->base_ptr
;
1703 mipoff1
= lp_build_get_mip_offsets(bld
, ilevel1
);
1706 lp_build_sample_image_linear(bld
, FALSE
, size1
, linear_mask
,
1707 row_stride1_vec
, img_stride1_vec
,
1708 data_ptr1
, mipoff1
, coords
, offsets
,
1711 /* interpolate samples from the two mipmap levels */
1713 if (bld
->num_lods
!= bld
->coord_type
.length
)
1714 lod_fpart
= lp_build_unpack_broadcast_aos_scalars(bld
->gallivm
,
1716 bld
->texel_bld
.type
,
1719 for (chan
= 0; chan
< 4; chan
++) {
1720 colors0
[chan
] = lp_build_lerp(&bld
->texel_bld
, lod_fpart
,
1721 colors0
[chan
], colors1
[chan
],
1723 LLVMBuildStore(builder
, colors0
[chan
], colors_out
[chan
]);
1726 lp_build_endif(&if_ctx
);
1732 * Build (per-coord) layer value.
1733 * Either clamp layer to valid values or fill in optional out_of_bounds
1734 * value and just return value unclamped.
1737 lp_build_layer_coord(struct lp_build_sample_context
*bld
,
1738 unsigned texture_unit
,
1739 boolean is_cube_array
,
1741 LLVMValueRef
*out_of_bounds
)
1743 LLVMValueRef num_layers
;
1744 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
1746 num_layers
= bld
->dynamic_state
->depth(bld
->dynamic_state
, bld
->gallivm
,
1747 bld
->context_ptr
, texture_unit
);
1749 if (out_of_bounds
) {
1750 LLVMValueRef out1
, out
;
1751 assert(!is_cube_array
);
1752 num_layers
= lp_build_broadcast_scalar(int_coord_bld
, num_layers
);
1753 out
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, layer
, int_coord_bld
->zero
);
1754 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, layer
, num_layers
);
1755 *out_of_bounds
= lp_build_or(int_coord_bld
, out
, out1
);
1759 LLVMValueRef maxlayer
;
1760 LLVMValueRef s
= is_cube_array
? lp_build_const_int32(bld
->gallivm
, 6) :
1762 maxlayer
= lp_build_sub(&bld
->int_bld
, num_layers
, s
);
1763 maxlayer
= lp_build_broadcast_scalar(int_coord_bld
, maxlayer
);
1764 return lp_build_clamp(int_coord_bld
, layer
, int_coord_bld
->zero
, maxlayer
);
1770 * Calculate cube face, lod, mip levels.
1773 lp_build_sample_common(struct lp_build_sample_context
*bld
,
1774 unsigned texture_index
,
1775 unsigned sampler_index
,
1776 LLVMValueRef
*coords
,
1777 const struct lp_derivatives
*derivs
, /* optional */
1778 LLVMValueRef lod_bias
, /* optional */
1779 LLVMValueRef explicit_lod
, /* optional */
1780 LLVMValueRef
*lod_pos_or_zero
,
1781 LLVMValueRef
*lod_fpart
,
1782 LLVMValueRef
*ilevel0
,
1783 LLVMValueRef
*ilevel1
)
1785 const unsigned mip_filter
= bld
->static_sampler_state
->min_mip_filter
;
1786 const unsigned min_filter
= bld
->static_sampler_state
->min_img_filter
;
1787 const unsigned mag_filter
= bld
->static_sampler_state
->mag_img_filter
;
1788 const unsigned target
= bld
->static_texture_state
->target
;
1789 LLVMValueRef first_level
, cube_rho
= NULL
;
1790 LLVMValueRef lod_ipart
= NULL
;
1791 struct lp_derivatives cube_derivs
;
1794 printf("%s mip %d min %d mag %d\n", __FUNCTION__,
1795 mip_filter, min_filter, mag_filter);
1799 * Choose cube face, recompute texcoords for the chosen face and
1800 * compute rho here too (as it requires transform of derivatives).
1802 if (target
== PIPE_TEXTURE_CUBE
|| target
== PIPE_TEXTURE_CUBE_ARRAY
) {
1803 boolean need_derivs
;
1804 need_derivs
= ((min_filter
!= mag_filter
||
1805 mip_filter
!= PIPE_TEX_MIPFILTER_NONE
) &&
1806 !bld
->static_sampler_state
->min_max_lod_equal
&&
1808 lp_build_cube_lookup(bld
, coords
, derivs
, &cube_rho
, &cube_derivs
, need_derivs
);
1809 derivs
= &cube_derivs
;
1810 if (target
== PIPE_TEXTURE_CUBE_ARRAY
) {
1811 /* calculate cube layer coord now */
1812 LLVMValueRef layer
= lp_build_iround(&bld
->coord_bld
, coords
[3]);
1813 LLVMValueRef six
= lp_build_const_int_vec(bld
->gallivm
, bld
->int_coord_type
, 6);
1814 layer
= lp_build_mul(&bld
->int_coord_bld
, layer
, six
);
1815 coords
[3] = lp_build_layer_coord(bld
, texture_index
, TRUE
, layer
, NULL
);
1816 /* because of seamless filtering can't add it to face (coords[2]) here. */
1819 else if (target
== PIPE_TEXTURE_1D_ARRAY
||
1820 target
== PIPE_TEXTURE_2D_ARRAY
) {
1821 coords
[2] = lp_build_iround(&bld
->coord_bld
, coords
[2]);
1822 coords
[2] = lp_build_layer_coord(bld
, texture_index
, FALSE
, coords
[2], NULL
);
1825 if (bld
->static_sampler_state
->compare_mode
!= PIPE_TEX_COMPARE_NONE
) {
1827 * Clamp p coords to [0,1] for fixed function depth texture format here.
1828 * Technically this is not entirely correct for unorm depth as the ref value
1829 * should be converted to the depth format (quantization!) and comparison
1830 * then done in texture format. This would actually help performance (since
1831 * only need to do it once and could save the per-sample conversion of texels
1832 * to floats instead), but it would need more messy code (would need to push
1833 * at least some bits down to actual fetch so conversion could be skipped,
1834 * and would have ugly interaction with border color, would need to convert
1835 * border color to that format too or do some other tricks to make it work).
1837 const struct util_format_description
*format_desc
= bld
->format_desc
;
1839 /* not entirely sure we couldn't end up with non-valid swizzle here */
1840 chan_type
= format_desc
->swizzle
[0] <= UTIL_FORMAT_SWIZZLE_W
?
1841 format_desc
->channel
[format_desc
->swizzle
[0]].type
:
1842 UTIL_FORMAT_TYPE_FLOAT
;
1843 if (chan_type
!= UTIL_FORMAT_TYPE_FLOAT
) {
1844 coords
[4] = lp_build_clamp(&bld
->coord_bld
, coords
[4],
1845 bld
->coord_bld
.zero
, bld
->coord_bld
.one
);
1850 * Compute the level of detail (float).
1852 if (min_filter
!= mag_filter
||
1853 mip_filter
!= PIPE_TEX_MIPFILTER_NONE
) {
1854 /* Need to compute lod either to choose mipmap levels or to
1855 * distinguish between minification/magnification with one mipmap level.
1857 lp_build_lod_selector(bld
, texture_index
, sampler_index
,
1858 coords
[0], coords
[1], coords
[2], cube_rho
,
1859 derivs
, lod_bias
, explicit_lod
,
1861 &lod_ipart
, lod_fpart
, lod_pos_or_zero
);
1863 lod_ipart
= bld
->lodi_bld
.zero
;
1864 *lod_pos_or_zero
= bld
->lodi_bld
.zero
;
1867 if (bld
->num_lods
!= bld
->num_mips
) {
1868 /* only makes sense if there's just a single mip level */
1869 assert(bld
->num_mips
== 1);
1870 lod_ipart
= lp_build_extract_range(bld
->gallivm
, lod_ipart
, 0, 1);
1874 * Compute integer mipmap level(s) to fetch texels from: ilevel0, ilevel1
1876 switch (mip_filter
) {
1878 assert(0 && "bad mip_filter value in lp_build_sample_soa()");
1880 case PIPE_TEX_MIPFILTER_NONE
:
1881 /* always use mip level 0 */
1882 first_level
= bld
->dynamic_state
->first_level(bld
->dynamic_state
,
1883 bld
->gallivm
, bld
->context_ptr
,
1885 first_level
= lp_build_broadcast_scalar(&bld
->leveli_bld
, first_level
);
1886 *ilevel0
= first_level
;
1888 case PIPE_TEX_MIPFILTER_NEAREST
:
1890 lp_build_nearest_mip_level(bld
, texture_index
, lod_ipart
, ilevel0
, NULL
);
1892 case PIPE_TEX_MIPFILTER_LINEAR
:
1895 lp_build_linear_mip_levels(bld
, texture_index
,
1896 lod_ipart
, lod_fpart
,
1903 lp_build_clamp_border_color(struct lp_build_sample_context
*bld
,
1904 unsigned sampler_unit
)
1906 struct gallivm_state
*gallivm
= bld
->gallivm
;
1907 LLVMBuilderRef builder
= gallivm
->builder
;
1908 LLVMValueRef border_color_ptr
=
1909 bld
->dynamic_state
->border_color(bld
->dynamic_state
, gallivm
,
1910 bld
->context_ptr
, sampler_unit
);
1911 LLVMValueRef border_color
;
1912 const struct util_format_description
*format_desc
= bld
->format_desc
;
1913 struct lp_type vec4_type
= bld
->texel_type
;
1914 struct lp_build_context vec4_bld
;
1915 LLVMValueRef min_clamp
= NULL
;
1916 LLVMValueRef max_clamp
= NULL
;
1919 * For normalized format need to clamp border color (technically
1920 * probably should also quantize the data). Really sucks doing this
1921 * here but can't avoid at least for now since this is part of
1922 * sampler state and texture format is part of sampler_view state.
1923 * GL expects also expects clamping for uint/sint formats too so
1924 * do that as well (d3d10 can't end up here with uint/sint since it
1925 * only supports them with ld).
1927 vec4_type
.length
= 4;
1928 lp_build_context_init(&vec4_bld
, gallivm
, vec4_type
);
1931 * Vectorized clamping of border color. Loading is a bit of a hack since
1932 * we just cast the pointer to float array to pointer to vec4
1935 border_color_ptr
= lp_build_array_get_ptr(gallivm
, border_color_ptr
,
1936 lp_build_const_int32(gallivm
, 0));
1937 border_color_ptr
= LLVMBuildBitCast(builder
, border_color_ptr
,
1938 LLVMPointerType(vec4_bld
.vec_type
, 0), "");
1939 border_color
= LLVMBuildLoad(builder
, border_color_ptr
, "");
1940 /* we don't have aligned type in the dynamic state unfortunately */
1941 lp_set_load_alignment(border_color
, 4);
1944 * Instead of having some incredibly complex logic which will try to figure out
1945 * clamping necessary for each channel, simply use the first channel, and treat
1946 * mixed signed/unsigned normalized formats specially.
1947 * (Mixed non-normalized, which wouldn't work at all here, do not exist for a
1950 if (format_desc
->layout
== UTIL_FORMAT_LAYOUT_PLAIN
) {
1952 /* d/s needs special handling because both present means just sampling depth */
1953 if (util_format_is_depth_and_stencil(format_desc
->format
)) {
1954 chan
= format_desc
->swizzle
[0];
1957 chan
= util_format_get_first_non_void_channel(format_desc
->format
);
1959 if (chan
>= 0 && chan
<= UTIL_FORMAT_SWIZZLE_W
) {
1960 unsigned chan_type
= format_desc
->channel
[chan
].type
;
1961 unsigned chan_norm
= format_desc
->channel
[chan
].normalized
;
1962 unsigned chan_pure
= format_desc
->channel
[chan
].pure_integer
;
1963 if (chan_type
== UTIL_FORMAT_TYPE_SIGNED
) {
1965 min_clamp
= lp_build_const_vec(gallivm
, vec4_type
, -1.0F
);
1966 max_clamp
= vec4_bld
.one
;
1968 else if (chan_pure
) {
1970 * Border color was stored as int, hence need min/max clamp
1971 * only if chan has less than 32 bits..
1973 unsigned chan_size
= format_desc
->channel
[chan
].size
;
1974 if (chan_size
< 32) {
1975 min_clamp
= lp_build_const_int_vec(gallivm
, vec4_type
,
1976 0 - (1 << (chan_size
- 1)));
1977 max_clamp
= lp_build_const_int_vec(gallivm
, vec4_type
,
1978 (1 << (chan_size
- 1)) - 1);
1981 /* TODO: no idea about non-pure, non-normalized! */
1983 else if (chan_type
== UTIL_FORMAT_TYPE_UNSIGNED
) {
1985 min_clamp
= vec4_bld
.zero
;
1986 max_clamp
= vec4_bld
.one
;
1989 * Need a ugly hack here, because we don't have Z32_FLOAT_X8X24
1990 * we use Z32_FLOAT_S8X24 to imply sampling depth component
1991 * and ignoring stencil, which will blow up here if we try to
1992 * do a uint clamp in a float texel build...
1993 * And even if we had that format, mesa st also thinks using z24s8
1994 * means depth sampling ignoring stencil.
1996 else if (chan_pure
) {
1998 * Border color was stored as uint, hence never need min
1999 * clamp, and only need max clamp if chan has less than 32 bits.
2001 unsigned chan_size
= format_desc
->channel
[chan
].size
;
2002 if (chan_size
< 32) {
2003 max_clamp
= lp_build_const_int_vec(gallivm
, vec4_type
,
2004 (1 << chan_size
) - 1);
2006 /* TODO: no idea about non-pure, non-normalized! */
2009 else if (chan_type
== UTIL_FORMAT_TYPE_FIXED
) {
2010 /* TODO: I have no idea what clamp this would need if any! */
2013 /* mixed plain formats (or different pure size) */
2014 switch (format_desc
->format
) {
2015 case PIPE_FORMAT_B10G10R10A2_UINT
:
2016 case PIPE_FORMAT_R10G10B10A2_UINT
:
2018 unsigned max10
= (1 << 10) - 1;
2019 max_clamp
= lp_build_const_aos(gallivm
, vec4_type
, max10
, max10
,
2020 max10
, (1 << 2) - 1, NULL
);
2023 case PIPE_FORMAT_R10SG10SB10SA2U_NORM
:
2024 min_clamp
= lp_build_const_aos(gallivm
, vec4_type
, -1.0F
, -1.0F
,
2026 max_clamp
= vec4_bld
.one
;
2028 case PIPE_FORMAT_R8SG8SB8UX8U_NORM
:
2029 case PIPE_FORMAT_R5SG5SB6U_NORM
:
2030 min_clamp
= lp_build_const_aos(gallivm
, vec4_type
, -1.0F
, -1.0F
,
2032 max_clamp
= vec4_bld
.one
;
2039 /* cannot figure this out from format description */
2040 if (format_desc
->layout
== UTIL_FORMAT_LAYOUT_S3TC
) {
2041 /* s3tc formats are always unorm */
2042 min_clamp
= vec4_bld
.zero
;
2043 max_clamp
= vec4_bld
.one
;
2045 else if (format_desc
->layout
== UTIL_FORMAT_LAYOUT_RGTC
||
2046 format_desc
->layout
== UTIL_FORMAT_LAYOUT_ETC
) {
2047 switch (format_desc
->format
) {
2048 case PIPE_FORMAT_RGTC1_UNORM
:
2049 case PIPE_FORMAT_RGTC2_UNORM
:
2050 case PIPE_FORMAT_LATC1_UNORM
:
2051 case PIPE_FORMAT_LATC2_UNORM
:
2052 case PIPE_FORMAT_ETC1_RGB8
:
2053 min_clamp
= vec4_bld
.zero
;
2054 max_clamp
= vec4_bld
.one
;
2056 case PIPE_FORMAT_RGTC1_SNORM
:
2057 case PIPE_FORMAT_RGTC2_SNORM
:
2058 case PIPE_FORMAT_LATC1_SNORM
:
2059 case PIPE_FORMAT_LATC2_SNORM
:
2060 min_clamp
= lp_build_const_vec(gallivm
, vec4_type
, -1.0F
);
2061 max_clamp
= vec4_bld
.one
;
2069 * all others from subsampled/other group, though we don't care
2070 * about yuv (and should not have any from zs here)
2072 else if (format_desc
->colorspace
!= UTIL_FORMAT_COLORSPACE_YUV
){
2073 switch (format_desc
->format
) {
2074 case PIPE_FORMAT_R8G8_B8G8_UNORM
:
2075 case PIPE_FORMAT_G8R8_G8B8_UNORM
:
2076 case PIPE_FORMAT_G8R8_B8R8_UNORM
:
2077 case PIPE_FORMAT_R8G8_R8B8_UNORM
:
2078 case PIPE_FORMAT_R1_UNORM
: /* doesn't make sense but ah well */
2079 min_clamp
= vec4_bld
.zero
;
2080 max_clamp
= vec4_bld
.one
;
2082 case PIPE_FORMAT_R8G8Bx_SNORM
:
2083 min_clamp
= lp_build_const_vec(gallivm
, vec4_type
, -1.0F
);
2084 max_clamp
= vec4_bld
.one
;
2087 * Note smallfloat formats usually don't need clamping
2088 * (they still have infinite range) however this is not
2089 * true for r11g11b10 and r9g9b9e5, which can't represent
2090 * negative numbers (and additionally r9g9b9e5 can't represent
2091 * very large numbers). d3d10 seems happy without clamping in
2092 * this case, but gl spec is pretty clear: "for floating
2093 * point and integer formats, border values are clamped to
2094 * the representable range of the format" so do that here.
2096 case PIPE_FORMAT_R11G11B10_FLOAT
:
2097 min_clamp
= vec4_bld
.zero
;
2099 case PIPE_FORMAT_R9G9B9E5_FLOAT
:
2100 min_clamp
= vec4_bld
.zero
;
2101 max_clamp
= lp_build_const_vec(gallivm
, vec4_type
, MAX_RGB9E5
);
2111 border_color
= lp_build_max(&vec4_bld
, border_color
, min_clamp
);
2114 border_color
= lp_build_min(&vec4_bld
, border_color
, max_clamp
);
2117 bld
->border_color_clamped
= border_color
;
2122 * General texture sampling codegen.
2123 * This function handles texture sampling for all texture targets (1D,
2124 * 2D, 3D, cube) and all filtering modes.
2127 lp_build_sample_general(struct lp_build_sample_context
*bld
,
2128 unsigned sampler_unit
,
2130 LLVMValueRef
*coords
,
2131 const LLVMValueRef
*offsets
,
2132 LLVMValueRef lod_positive
,
2133 LLVMValueRef lod_fpart
,
2134 LLVMValueRef ilevel0
,
2135 LLVMValueRef ilevel1
,
2136 LLVMValueRef
*colors_out
)
2138 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
2139 const struct lp_static_sampler_state
*sampler_state
= bld
->static_sampler_state
;
2140 const unsigned mip_filter
= sampler_state
->min_mip_filter
;
2141 const unsigned min_filter
= sampler_state
->min_img_filter
;
2142 const unsigned mag_filter
= sampler_state
->mag_img_filter
;
2143 LLVMValueRef texels
[4];
2146 /* if we need border color, (potentially) clamp it now */
2147 if (lp_sampler_wrap_mode_uses_border_color(sampler_state
->wrap_s
,
2151 lp_sampler_wrap_mode_uses_border_color(sampler_state
->wrap_t
,
2155 lp_sampler_wrap_mode_uses_border_color(sampler_state
->wrap_r
,
2158 lp_build_clamp_border_color(bld
, sampler_unit
);
2163 * Get/interpolate texture colors.
2166 for (chan
= 0; chan
< 4; ++chan
) {
2167 texels
[chan
] = lp_build_alloca(bld
->gallivm
, bld
->texel_bld
.vec_type
, "");
2168 lp_build_name(texels
[chan
], "sampler%u_texel_%c_var", sampler_unit
, "xyzw"[chan
]);
2171 if (min_filter
== mag_filter
) {
2172 /* no need to distinguish between minification and magnification */
2173 lp_build_sample_mipmap(bld
, min_filter
, mip_filter
,
2176 ilevel0
, ilevel1
, lod_fpart
,
2181 * Could also get rid of the if-logic and always use mipmap_both, both
2182 * for the single lod and multi-lod case if nothing really uses this.
2184 if (bld
->num_lods
== 1) {
2185 /* Emit conditional to choose min image filter or mag image filter
2186 * depending on the lod being > 0 or <= 0, respectively.
2188 struct lp_build_if_state if_ctx
;
2190 lod_positive
= LLVMBuildTrunc(builder
, lod_positive
,
2191 LLVMInt1TypeInContext(bld
->gallivm
->context
), "");
2193 lp_build_if(&if_ctx
, bld
->gallivm
, lod_positive
);
2195 /* Use the minification filter */
2196 lp_build_sample_mipmap(bld
, min_filter
, mip_filter
, FALSE
,
2198 ilevel0
, ilevel1
, lod_fpart
,
2201 lp_build_else(&if_ctx
);
2203 /* Use the magnification filter */
2204 lp_build_sample_mipmap(bld
, mag_filter
, PIPE_TEX_MIPFILTER_NONE
,
2207 ilevel0
, NULL
, NULL
,
2210 lp_build_endif(&if_ctx
);
2213 LLVMValueRef need_linear
, linear_mask
;
2214 unsigned mip_filter_for_nearest
;
2215 struct lp_build_if_state if_ctx
;
2217 if (min_filter
== PIPE_TEX_FILTER_LINEAR
) {
2218 linear_mask
= lod_positive
;
2219 mip_filter_for_nearest
= PIPE_TEX_MIPFILTER_NONE
;
2222 linear_mask
= lp_build_not(&bld
->lodi_bld
, lod_positive
);
2223 mip_filter_for_nearest
= mip_filter
;
2225 need_linear
= lp_build_any_true_range(&bld
->lodi_bld
, bld
->num_lods
,
2228 if (bld
->num_lods
!= bld
->coord_type
.length
) {
2229 linear_mask
= lp_build_unpack_broadcast_aos_scalars(bld
->gallivm
,
2231 bld
->int_coord_type
,
2235 lp_build_if(&if_ctx
, bld
->gallivm
, need_linear
);
2238 * Do sampling with both filters simultaneously. This means using
2239 * a linear filter and doing some tricks (with weights) for the pixels
2240 * which need nearest filter.
2241 * Note that it's probably rare some pixels need nearest and some
2242 * linear filter but the fixups required for the nearest pixels
2243 * aren't all that complicated so just always run a combined path
2244 * if at least some pixels require linear.
2246 lp_build_sample_mipmap_both(bld
, linear_mask
, mip_filter
,
2249 lod_fpart
, lod_positive
,
2252 lp_build_else(&if_ctx
);
2255 * All pixels require just nearest filtering, which is way
2256 * cheaper than linear, hence do a separate path for that.
2258 lp_build_sample_mipmap(bld
, PIPE_TEX_FILTER_NEAREST
, FALSE
,
2259 mip_filter_for_nearest
,
2261 ilevel0
, ilevel1
, lod_fpart
,
2264 lp_build_endif(&if_ctx
);
2268 for (chan
= 0; chan
< 4; ++chan
) {
2269 colors_out
[chan
] = LLVMBuildLoad(builder
, texels
[chan
], "");
2270 lp_build_name(colors_out
[chan
], "sampler%u_texel_%c", sampler_unit
, "xyzw"[chan
]);
2276 * Texel fetch function.
2277 * In contrast to general sampling there is no filtering, no coord minification,
2278 * lod (if any) is always explicit uint, coords are uints (in terms of texel units)
2279 * directly to be applied to the selected mip level (after adding texel offsets).
2280 * This function handles texel fetch for all targets where texel fetch is supported
2281 * (no cube maps, but 1d, 2d, 3d are supported, arrays and buffers should be too).
2284 lp_build_fetch_texel(struct lp_build_sample_context
*bld
,
2285 unsigned texture_unit
,
2286 const LLVMValueRef
*coords
,
2287 LLVMValueRef explicit_lod
,
2288 const LLVMValueRef
*offsets
,
2289 LLVMValueRef
*colors_out
)
2291 struct lp_build_context
*perquadi_bld
= &bld
->lodi_bld
;
2292 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
2293 unsigned dims
= bld
->dims
, chan
;
2294 unsigned target
= bld
->static_texture_state
->target
;
2295 boolean out_of_bound_ret_zero
= TRUE
;
2296 LLVMValueRef size
, ilevel
;
2297 LLVMValueRef row_stride_vec
= NULL
, img_stride_vec
= NULL
;
2298 LLVMValueRef x
= coords
[0], y
= coords
[1], z
= coords
[2];
2299 LLVMValueRef width
, height
, depth
, i
, j
;
2300 LLVMValueRef offset
, out_of_bounds
, out1
;
2302 out_of_bounds
= int_coord_bld
->zero
;
2304 if (explicit_lod
&& bld
->static_texture_state
->target
!= PIPE_BUFFER
) {
2305 if (bld
->num_mips
!= int_coord_bld
->type
.length
) {
2306 ilevel
= lp_build_pack_aos_scalars(bld
->gallivm
, int_coord_bld
->type
,
2307 perquadi_bld
->type
, explicit_lod
, 0);
2310 ilevel
= explicit_lod
;
2312 lp_build_nearest_mip_level(bld
, texture_unit
, ilevel
, &ilevel
,
2313 out_of_bound_ret_zero
? &out_of_bounds
: NULL
);
2316 assert(bld
->num_mips
== 1);
2317 if (bld
->static_texture_state
->target
!= PIPE_BUFFER
) {
2318 ilevel
= bld
->dynamic_state
->first_level(bld
->dynamic_state
, bld
->gallivm
,
2319 bld
->context_ptr
, texture_unit
);
2322 ilevel
= lp_build_const_int32(bld
->gallivm
, 0);
2325 lp_build_mipmap_level_sizes(bld
, ilevel
,
2327 &row_stride_vec
, &img_stride_vec
);
2328 lp_build_extract_image_sizes(bld
, &bld
->int_size_bld
, int_coord_bld
->type
,
2329 size
, &width
, &height
, &depth
);
2331 if (target
== PIPE_TEXTURE_1D_ARRAY
||
2332 target
== PIPE_TEXTURE_2D_ARRAY
) {
2333 if (out_of_bound_ret_zero
) {
2334 z
= lp_build_layer_coord(bld
, texture_unit
, FALSE
, z
, &out1
);
2335 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
2338 z
= lp_build_layer_coord(bld
, texture_unit
, FALSE
, z
, NULL
);
2342 /* This is a lot like border sampling */
2345 * coords are really unsigned, offsets are signed, but I don't think
2346 * exceeding 31 bits is possible
2348 x
= lp_build_add(int_coord_bld
, x
, offsets
[0]);
2350 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, x
, int_coord_bld
->zero
);
2351 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
2352 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, x
, width
);
2353 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
2357 y
= lp_build_add(int_coord_bld
, y
, offsets
[1]);
2359 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, y
, int_coord_bld
->zero
);
2360 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
2361 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, y
, height
);
2362 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
2366 z
= lp_build_add(int_coord_bld
, z
, offsets
[2]);
2368 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, z
, int_coord_bld
->zero
);
2369 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
2370 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, z
, depth
);
2371 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
2375 lp_build_sample_offset(int_coord_bld
,
2377 x
, y
, z
, row_stride_vec
, img_stride_vec
,
2380 if (bld
->static_texture_state
->target
!= PIPE_BUFFER
) {
2381 offset
= lp_build_add(int_coord_bld
, offset
,
2382 lp_build_get_mip_offsets(bld
, ilevel
));
2385 offset
= lp_build_andnot(int_coord_bld
, offset
, out_of_bounds
);
2387 lp_build_fetch_rgba_soa(bld
->gallivm
,
2390 bld
->base_ptr
, offset
,
2394 if (out_of_bound_ret_zero
) {
2396 * Only needed for ARB_robust_buffer_access_behavior and d3d10.
2397 * Could use min/max above instead of out-of-bounds comparisons
2398 * if we don't care about the result returned for out-of-bounds.
2400 for (chan
= 0; chan
< 4; chan
++) {
2401 colors_out
[chan
] = lp_build_select(&bld
->texel_bld
, out_of_bounds
,
2402 bld
->texel_bld
.zero
, colors_out
[chan
]);
2409 * Just set texels to white instead of actually sampling the texture.
2413 lp_build_sample_nop(struct gallivm_state
*gallivm
,
2414 struct lp_type type
,
2415 const LLVMValueRef
*coords
,
2416 LLVMValueRef texel_out
[4])
2418 LLVMValueRef one
= lp_build_one(gallivm
, type
);
2421 for (chan
= 0; chan
< 4; chan
++) {
2422 texel_out
[chan
] = one
;
2428 * Build the actual texture sampling code.
2429 * 'texel' will return a vector of four LLVMValueRefs corresponding to
2431 * \param type vector float type to use for coords, etc.
2433 * \param derivs partial derivatives of (s,t,r,q) with respect to x and y
2436 lp_build_sample_soa_code(struct gallivm_state
*gallivm
,
2437 const struct lp_static_texture_state
*static_texture_state
,
2438 const struct lp_static_sampler_state
*static_sampler_state
,
2439 struct lp_sampler_dynamic_state
*dynamic_state
,
2440 struct lp_type type
,
2441 unsigned sample_key
,
2442 unsigned texture_index
,
2443 unsigned sampler_index
,
2444 LLVMValueRef context_ptr
,
2445 const LLVMValueRef
*coords
,
2446 const LLVMValueRef
*offsets
,
2447 const struct lp_derivatives
*derivs
, /* optional */
2448 LLVMValueRef lod
, /* optional */
2449 LLVMValueRef texel_out
[4])
2451 unsigned target
= static_texture_state
->target
;
2452 unsigned dims
= texture_dims(target
);
2453 unsigned num_quads
= type
.length
/ 4;
2454 unsigned mip_filter
, min_img_filter
, mag_img_filter
, i
;
2455 struct lp_build_sample_context bld
;
2456 struct lp_static_sampler_state derived_sampler_state
= *static_sampler_state
;
2457 LLVMTypeRef i32t
= LLVMInt32TypeInContext(gallivm
->context
);
2458 LLVMBuilderRef builder
= gallivm
->builder
;
2459 LLVMValueRef tex_width
, newcoords
[5];
2460 enum lp_sampler_lod_property lod_property
;
2461 enum lp_sampler_lod_control lod_control
;
2462 enum lp_sampler_op_type op_type
;
2463 LLVMValueRef lod_bias
= NULL
;
2464 LLVMValueRef explicit_lod
= NULL
;
2468 enum pipe_format fmt
= static_texture_state
->format
;
2469 debug_printf("Sample from %s\n", util_format_name(fmt
));
2472 lod_property
= (sample_key
& LP_SAMPLER_LOD_PROPERTY_MASK
) >>
2473 LP_SAMPLER_LOD_PROPERTY_SHIFT
;
2474 lod_control
= (sample_key
& LP_SAMPLER_LOD_CONTROL_MASK
) >>
2475 LP_SAMPLER_LOD_CONTROL_SHIFT
;
2476 op_type
= (sample_key
& LP_SAMPLER_OP_TYPE_MASK
) >>
2477 LP_SAMPLER_OP_TYPE_SHIFT
;
2479 op_is_tex
= op_type
== LP_SAMPLER_OP_TEXTURE
;
2481 if (lod_control
== LP_SAMPLER_LOD_BIAS
) {
2484 assert(derivs
== NULL
);
2486 else if (lod_control
== LP_SAMPLER_LOD_EXPLICIT
) {
2489 assert(derivs
== NULL
);
2491 else if (lod_control
== LP_SAMPLER_LOD_DERIVATIVES
) {
2493 assert(lod
== NULL
);
2496 assert(derivs
== NULL
);
2497 assert(lod
== NULL
);
2500 if (static_texture_state
->format
== PIPE_FORMAT_NONE
) {
2502 * If there's nothing bound, format is NONE, and we must return
2503 * all zero as mandated by d3d10 in this case.
2506 LLVMValueRef zero
= lp_build_zero(gallivm
, type
);
2507 for (chan
= 0; chan
< 4; chan
++) {
2508 texel_out
[chan
] = zero
;
2513 assert(type
.floating
);
2515 /* Setup our build context */
2516 memset(&bld
, 0, sizeof bld
);
2517 bld
.gallivm
= gallivm
;
2518 bld
.context_ptr
= context_ptr
;
2519 bld
.static_sampler_state
= &derived_sampler_state
;
2520 bld
.static_texture_state
= static_texture_state
;
2521 bld
.dynamic_state
= dynamic_state
;
2522 bld
.format_desc
= util_format_description(static_texture_state
->format
);
2525 bld
.vector_width
= lp_type_width(type
);
2527 bld
.float_type
= lp_type_float(32);
2528 bld
.int_type
= lp_type_int(32);
2529 bld
.coord_type
= type
;
2530 bld
.int_coord_type
= lp_int_type(type
);
2531 bld
.float_size_in_type
= lp_type_float(32);
2532 bld
.float_size_in_type
.length
= dims
> 1 ? 4 : 1;
2533 bld
.int_size_in_type
= lp_int_type(bld
.float_size_in_type
);
2534 bld
.texel_type
= type
;
2536 /* always using the first channel hopefully should be safe,
2537 * if not things WILL break in other places anyway.
2539 if (bld
.format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
&&
2540 bld
.format_desc
->channel
[0].pure_integer
) {
2541 if (bld
.format_desc
->channel
[0].type
== UTIL_FORMAT_TYPE_SIGNED
) {
2542 bld
.texel_type
= lp_type_int_vec(type
.width
, type
.width
* type
.length
);
2544 else if (bld
.format_desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
) {
2545 bld
.texel_type
= lp_type_uint_vec(type
.width
, type
.width
* type
.length
);
2548 else if (util_format_has_stencil(bld
.format_desc
) &&
2549 !util_format_has_depth(bld
.format_desc
)) {
2550 /* for stencil only formats, sample stencil (uint) */
2551 bld
.texel_type
= lp_type_int_vec(type
.width
, type
.width
* type
.length
);
2554 if (!static_texture_state
->level_zero_only
) {
2555 derived_sampler_state
.min_mip_filter
= static_sampler_state
->min_mip_filter
;
2557 derived_sampler_state
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
2559 if (op_type
== LP_SAMPLER_OP_GATHER
) {
2561 * gather4 is exactly like GL_LINEAR filtering but in the end skipping
2562 * the actual filtering. Using mostly the same paths, so cube face
2563 * selection, coord wrapping etc. all naturally uses the same code.
2565 derived_sampler_state
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
2566 derived_sampler_state
.min_img_filter
= PIPE_TEX_FILTER_LINEAR
;
2567 derived_sampler_state
.mag_img_filter
= PIPE_TEX_FILTER_LINEAR
;
2569 mip_filter
= derived_sampler_state
.min_mip_filter
;
2572 debug_printf(" .min_mip_filter = %u\n", derived_sampler_state
.min_mip_filter
);
2575 if (static_texture_state
->target
== PIPE_TEXTURE_CUBE
||
2576 static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
)
2579 * Seamless filtering ignores wrap modes.
2580 * Setting to CLAMP_TO_EDGE is correct for nearest filtering, for
2581 * bilinear it's not correct but way better than using for instance repeat.
2582 * Note we even set this for non-seamless. Technically GL allows any wrap
2583 * mode, which made sense when supporting true borders (can get seamless
2584 * effect with border and CLAMP_TO_BORDER), but gallium doesn't support
2585 * borders and d3d9 requires wrap modes to be ignored and it's a pain to fix
2586 * up the sampler state (as it makes it texture dependent).
2588 derived_sampler_state
.wrap_s
= PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
2589 derived_sampler_state
.wrap_t
= PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
2592 * We could force CLAMP to CLAMP_TO_EDGE here if min/mag filter is nearest,
2593 * so AoS path could be used. Not sure it's worth the trouble...
2596 min_img_filter
= derived_sampler_state
.min_img_filter
;
2597 mag_img_filter
= derived_sampler_state
.mag_img_filter
;
2601 * This is all a bit complicated different paths are chosen for performance
2603 * Essentially, there can be 1 lod per element, 1 lod per quad or 1 lod for
2604 * everything (the last two options are equivalent for 4-wide case).
2605 * If there's per-quad lod but we split to 4-wide so we can use AoS, per-quad
2606 * lod is calculated then the lod value extracted afterwards so making this
2607 * case basically the same as far as lod handling is concerned for the
2608 * further sample/filter code as the 1 lod for everything case.
2609 * Different lod handling mostly shows up when building mipmap sizes
2610 * (lp_build_mipmap_level_sizes() and friends) and also in filtering
2611 * (getting the fractional part of the lod to the right texels).
2615 * There are other situations where at least the multiple int lods could be
2616 * avoided like min and max lod being equal.
2618 bld
.num_mips
= bld
.num_lods
= 1;
2620 if ((gallivm_debug
& GALLIVM_DEBUG_NO_QUAD_LOD
) &&
2621 (gallivm_debug
& GALLIVM_DEBUG_NO_RHO_APPROX
) &&
2622 (static_texture_state
->target
== PIPE_TEXTURE_CUBE
||
2623 static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) &&
2624 (op_is_tex
&& mip_filter
!= PIPE_TEX_MIPFILTER_NONE
)) {
2626 * special case for using per-pixel lod even for implicit lod,
2627 * which is generally never required (ok by APIs) except to please
2628 * some (somewhat broken imho) tests (because per-pixel face selection
2629 * can cause derivatives to be different for pixels outside the primitive
2630 * due to the major axis division even if pre-project derivatives are
2633 bld
.num_mips
= type
.length
;
2634 bld
.num_lods
= type
.length
;
2636 else if (lod_property
== LP_SAMPLER_LOD_PER_ELEMENT
||
2637 (explicit_lod
|| lod_bias
|| derivs
)) {
2638 if ((!op_is_tex
&& target
!= PIPE_BUFFER
) ||
2639 (op_is_tex
&& mip_filter
!= PIPE_TEX_MIPFILTER_NONE
)) {
2640 bld
.num_mips
= type
.length
;
2641 bld
.num_lods
= type
.length
;
2643 else if (op_is_tex
&& min_img_filter
!= mag_img_filter
) {
2645 bld
.num_lods
= type
.length
;
2648 /* TODO: for true scalar_lod should only use 1 lod value */
2649 else if ((!op_is_tex
&& explicit_lod
&& target
!= PIPE_BUFFER
) ||
2650 (op_is_tex
&& mip_filter
!= PIPE_TEX_MIPFILTER_NONE
)) {
2651 bld
.num_mips
= num_quads
;
2652 bld
.num_lods
= num_quads
;
2654 else if (op_is_tex
&& min_img_filter
!= mag_img_filter
) {
2656 bld
.num_lods
= num_quads
;
2660 bld
.lodf_type
= type
;
2661 /* we want native vector size to be able to use our intrinsics */
2662 if (bld
.num_lods
!= type
.length
) {
2663 /* TODO: this currently always has to be per-quad or per-element */
2664 bld
.lodf_type
.length
= type
.length
> 4 ? ((type
.length
+ 15) / 16) * 4 : 1;
2666 bld
.lodi_type
= lp_int_type(bld
.lodf_type
);
2667 bld
.levelf_type
= bld
.lodf_type
;
2668 if (bld
.num_mips
== 1) {
2669 bld
.levelf_type
.length
= 1;
2671 bld
.leveli_type
= lp_int_type(bld
.levelf_type
);
2672 bld
.float_size_type
= bld
.float_size_in_type
;
2673 /* Note: size vectors may not be native. They contain minified w/h/d/_ values,
2674 * with per-element lod that is w0/h0/d0/_/w1/h1/d1_/... so up to 8x4f32 */
2675 if (bld
.num_mips
> 1) {
2676 bld
.float_size_type
.length
= bld
.num_mips
== type
.length
?
2677 bld
.num_mips
* bld
.float_size_in_type
.length
:
2680 bld
.int_size_type
= lp_int_type(bld
.float_size_type
);
2682 lp_build_context_init(&bld
.float_bld
, gallivm
, bld
.float_type
);
2683 lp_build_context_init(&bld
.float_vec_bld
, gallivm
, type
);
2684 lp_build_context_init(&bld
.int_bld
, gallivm
, bld
.int_type
);
2685 lp_build_context_init(&bld
.coord_bld
, gallivm
, bld
.coord_type
);
2686 lp_build_context_init(&bld
.int_coord_bld
, gallivm
, bld
.int_coord_type
);
2687 lp_build_context_init(&bld
.int_size_in_bld
, gallivm
, bld
.int_size_in_type
);
2688 lp_build_context_init(&bld
.float_size_in_bld
, gallivm
, bld
.float_size_in_type
);
2689 lp_build_context_init(&bld
.int_size_bld
, gallivm
, bld
.int_size_type
);
2690 lp_build_context_init(&bld
.float_size_bld
, gallivm
, bld
.float_size_type
);
2691 lp_build_context_init(&bld
.texel_bld
, gallivm
, bld
.texel_type
);
2692 lp_build_context_init(&bld
.levelf_bld
, gallivm
, bld
.levelf_type
);
2693 lp_build_context_init(&bld
.leveli_bld
, gallivm
, bld
.leveli_type
);
2694 lp_build_context_init(&bld
.lodf_bld
, gallivm
, bld
.lodf_type
);
2695 lp_build_context_init(&bld
.lodi_bld
, gallivm
, bld
.lodi_type
);
2697 /* Get the dynamic state */
2698 tex_width
= dynamic_state
->width(dynamic_state
, gallivm
,
2699 context_ptr
, texture_index
);
2700 bld
.row_stride_array
= dynamic_state
->row_stride(dynamic_state
, gallivm
,
2701 context_ptr
, texture_index
);
2702 bld
.img_stride_array
= dynamic_state
->img_stride(dynamic_state
, gallivm
,
2703 context_ptr
, texture_index
);
2704 bld
.base_ptr
= dynamic_state
->base_ptr(dynamic_state
, gallivm
,
2705 context_ptr
, texture_index
);
2706 bld
.mip_offsets
= dynamic_state
->mip_offsets(dynamic_state
, gallivm
,
2707 context_ptr
, texture_index
);
2708 /* Note that mip_offsets is an array[level] of offsets to texture images */
2710 /* width, height, depth as single int vector */
2712 bld
.int_size
= tex_width
;
2715 bld
.int_size
= LLVMBuildInsertElement(builder
, bld
.int_size_in_bld
.undef
,
2717 LLVMConstInt(i32t
, 0, 0), "");
2719 LLVMValueRef tex_height
=
2720 dynamic_state
->height(dynamic_state
, gallivm
,
2721 context_ptr
, texture_index
);
2722 bld
.int_size
= LLVMBuildInsertElement(builder
, bld
.int_size
,
2724 LLVMConstInt(i32t
, 1, 0), "");
2726 LLVMValueRef tex_depth
=
2727 dynamic_state
->depth(dynamic_state
, gallivm
, context_ptr
,
2729 bld
.int_size
= LLVMBuildInsertElement(builder
, bld
.int_size
,
2731 LLVMConstInt(i32t
, 2, 0), "");
2736 for (i
= 0; i
< 5; i
++) {
2737 newcoords
[i
] = coords
[i
];
2741 /* For debug: no-op texture sampling */
2742 lp_build_sample_nop(gallivm
,
2748 else if (op_type
== LP_SAMPLER_OP_FETCH
) {
2749 lp_build_fetch_texel(&bld
, texture_index
, newcoords
,
2755 LLVMValueRef lod_fpart
= NULL
, lod_positive
= NULL
;
2756 LLVMValueRef ilevel0
= NULL
, ilevel1
= NULL
;
2759 if (util_format_is_pure_integer(static_texture_state
->format
) &&
2760 !util_format_has_depth(bld
.format_desc
) &&
2761 (static_sampler_state
->min_mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
||
2762 static_sampler_state
->min_img_filter
== PIPE_TEX_FILTER_LINEAR
||
2763 static_sampler_state
->mag_img_filter
== PIPE_TEX_FILTER_LINEAR
)) {
2765 * Bail if impossible filtering is specified (the awkard additional
2766 * depth check is because it is legal in gallium to have things like S8Z24
2767 * here which would say it's pure int despite such formats should sample
2768 * the depth component).
2769 * In GL such filters make the texture incomplete, this makes it robust
2770 * against state trackers which set this up regardless (we'd crash in the
2771 * lerp later (except for gather)).
2772 * Must do this after fetch_texel code since with GL state tracker we'll
2773 * get some junk sampler for buffer textures.
2776 LLVMValueRef zero
= lp_build_zero(gallivm
, type
);
2777 for (chan
= 0; chan
< 4; chan
++) {
2778 texel_out
[chan
] = zero
;
2783 use_aos
= util_format_fits_8unorm(bld
.format_desc
) &&
2785 /* not sure this is strictly needed or simply impossible */
2786 derived_sampler_state
.compare_mode
== PIPE_TEX_COMPARE_NONE
&&
2787 lp_is_simple_wrap_mode(derived_sampler_state
.wrap_s
);
2789 use_aos
&= bld
.num_lods
<= num_quads
||
2790 derived_sampler_state
.min_img_filter
==
2791 derived_sampler_state
.mag_img_filter
;
2793 use_aos
&= lp_is_simple_wrap_mode(derived_sampler_state
.wrap_t
);
2795 use_aos
&= lp_is_simple_wrap_mode(derived_sampler_state
.wrap_r
);
2798 if ((static_texture_state
->target
== PIPE_TEXTURE_CUBE
||
2799 static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) &&
2800 derived_sampler_state
.seamless_cube_map
&&
2801 (derived_sampler_state
.min_img_filter
== PIPE_TEX_FILTER_LINEAR
||
2802 derived_sampler_state
.mag_img_filter
== PIPE_TEX_FILTER_LINEAR
)) {
2803 /* theoretically possible with AoS filtering but not implemented (complex!) */
2807 if ((gallivm_debug
& GALLIVM_DEBUG_PERF
) &&
2808 !use_aos
&& util_format_fits_8unorm(bld
.format_desc
)) {
2809 debug_printf("%s: using floating point linear filtering for %s\n",
2810 __FUNCTION__
, bld
.format_desc
->short_name
);
2811 debug_printf(" min_img %d mag_img %d mip %d target %d seamless %d"
2812 " wraps %d wrapt %d wrapr %d\n",
2813 derived_sampler_state
.min_img_filter
,
2814 derived_sampler_state
.mag_img_filter
,
2815 derived_sampler_state
.min_mip_filter
,
2816 static_texture_state
->target
,
2817 derived_sampler_state
.seamless_cube_map
,
2818 derived_sampler_state
.wrap_s
,
2819 derived_sampler_state
.wrap_t
,
2820 derived_sampler_state
.wrap_r
);
2823 lp_build_sample_common(&bld
, texture_index
, sampler_index
,
2825 derivs
, lod_bias
, explicit_lod
,
2826 &lod_positive
, &lod_fpart
,
2827 &ilevel0
, &ilevel1
);
2829 if (use_aos
&& static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) {
2830 /* The aos path doesn't do seamless filtering so simply add cube layer
2833 newcoords
[2] = lp_build_add(&bld
.int_coord_bld
, newcoords
[2], newcoords
[3]);
2837 * we only try 8-wide sampling with soa as it appears to
2838 * be a loss with aos with AVX (but it should work, except
2839 * for conformance if min_filter != mag_filter if num_lods > 1).
2840 * (It should be faster if we'd support avx2)
2842 if (num_quads
== 1 || !use_aos
) {
2844 /* do sampling/filtering with fixed pt arithmetic */
2845 lp_build_sample_aos(&bld
, sampler_index
,
2846 newcoords
[0], newcoords
[1],
2848 offsets
, lod_positive
, lod_fpart
,
2854 lp_build_sample_general(&bld
, sampler_index
,
2855 op_type
== LP_SAMPLER_OP_GATHER
,
2857 lod_positive
, lod_fpart
,
2864 struct lp_build_sample_context bld4
;
2865 struct lp_type type4
= type
;
2867 LLVMValueRef texelout4
[4];
2868 LLVMValueRef texelouttmp
[4][LP_MAX_VECTOR_LENGTH
/16];
2872 /* Setup our build context */
2873 memset(&bld4
, 0, sizeof bld4
);
2874 bld4
.gallivm
= bld
.gallivm
;
2875 bld4
.context_ptr
= bld
.context_ptr
;
2876 bld4
.static_texture_state
= bld
.static_texture_state
;
2877 bld4
.static_sampler_state
= bld
.static_sampler_state
;
2878 bld4
.dynamic_state
= bld
.dynamic_state
;
2879 bld4
.format_desc
= bld
.format_desc
;
2880 bld4
.dims
= bld
.dims
;
2881 bld4
.row_stride_array
= bld
.row_stride_array
;
2882 bld4
.img_stride_array
= bld
.img_stride_array
;
2883 bld4
.base_ptr
= bld
.base_ptr
;
2884 bld4
.mip_offsets
= bld
.mip_offsets
;
2885 bld4
.int_size
= bld
.int_size
;
2887 bld4
.vector_width
= lp_type_width(type4
);
2889 bld4
.float_type
= lp_type_float(32);
2890 bld4
.int_type
= lp_type_int(32);
2891 bld4
.coord_type
= type4
;
2892 bld4
.int_coord_type
= lp_int_type(type4
);
2893 bld4
.float_size_in_type
= lp_type_float(32);
2894 bld4
.float_size_in_type
.length
= dims
> 1 ? 4 : 1;
2895 bld4
.int_size_in_type
= lp_int_type(bld4
.float_size_in_type
);
2896 bld4
.texel_type
= bld
.texel_type
;
2897 bld4
.texel_type
.length
= 4;
2899 bld4
.num_mips
= bld4
.num_lods
= 1;
2900 if ((gallivm_debug
& GALLIVM_DEBUG_NO_QUAD_LOD
) &&
2901 (gallivm_debug
& GALLIVM_DEBUG_NO_RHO_APPROX
) &&
2902 (static_texture_state
->target
== PIPE_TEXTURE_CUBE
||
2903 static_texture_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
) &&
2904 (op_is_tex
&& mip_filter
!= PIPE_TEX_MIPFILTER_NONE
)) {
2905 bld4
.num_mips
= type4
.length
;
2906 bld4
.num_lods
= type4
.length
;
2908 if (lod_property
== LP_SAMPLER_LOD_PER_ELEMENT
&&
2909 (explicit_lod
|| lod_bias
|| derivs
)) {
2910 if ((!op_is_tex
&& target
!= PIPE_BUFFER
) ||
2911 (op_is_tex
&& mip_filter
!= PIPE_TEX_MIPFILTER_NONE
)) {
2912 bld4
.num_mips
= type4
.length
;
2913 bld4
.num_lods
= type4
.length
;
2915 else if (op_is_tex
&& min_img_filter
!= mag_img_filter
) {
2917 bld4
.num_lods
= type4
.length
;
2921 /* we want native vector size to be able to use our intrinsics */
2922 bld4
.lodf_type
= type4
;
2923 if (bld4
.num_lods
!= type4
.length
) {
2924 bld4
.lodf_type
.length
= 1;
2926 bld4
.lodi_type
= lp_int_type(bld4
.lodf_type
);
2927 bld4
.levelf_type
= type4
;
2928 if (bld4
.num_mips
!= type4
.length
) {
2929 bld4
.levelf_type
.length
= 1;
2931 bld4
.leveli_type
= lp_int_type(bld4
.levelf_type
);
2932 bld4
.float_size_type
= bld4
.float_size_in_type
;
2933 if (bld4
.num_mips
> 1) {
2934 bld4
.float_size_type
.length
= bld4
.num_mips
== type4
.length
?
2935 bld4
.num_mips
* bld4
.float_size_in_type
.length
:
2938 bld4
.int_size_type
= lp_int_type(bld4
.float_size_type
);
2940 lp_build_context_init(&bld4
.float_bld
, gallivm
, bld4
.float_type
);
2941 lp_build_context_init(&bld4
.float_vec_bld
, gallivm
, type4
);
2942 lp_build_context_init(&bld4
.int_bld
, gallivm
, bld4
.int_type
);
2943 lp_build_context_init(&bld4
.coord_bld
, gallivm
, bld4
.coord_type
);
2944 lp_build_context_init(&bld4
.int_coord_bld
, gallivm
, bld4
.int_coord_type
);
2945 lp_build_context_init(&bld4
.int_size_in_bld
, gallivm
, bld4
.int_size_in_type
);
2946 lp_build_context_init(&bld4
.float_size_in_bld
, gallivm
, bld4
.float_size_in_type
);
2947 lp_build_context_init(&bld4
.int_size_bld
, gallivm
, bld4
.int_size_type
);
2948 lp_build_context_init(&bld4
.float_size_bld
, gallivm
, bld4
.float_size_type
);
2949 lp_build_context_init(&bld4
.texel_bld
, gallivm
, bld4
.texel_type
);
2950 lp_build_context_init(&bld4
.levelf_bld
, gallivm
, bld4
.levelf_type
);
2951 lp_build_context_init(&bld4
.leveli_bld
, gallivm
, bld4
.leveli_type
);
2952 lp_build_context_init(&bld4
.lodf_bld
, gallivm
, bld4
.lodf_type
);
2953 lp_build_context_init(&bld4
.lodi_bld
, gallivm
, bld4
.lodi_type
);
2955 for (i
= 0; i
< num_quads
; i
++) {
2956 LLVMValueRef s4
, t4
, r4
;
2957 LLVMValueRef lod_positive4
, lod_fpart4
= NULL
;
2958 LLVMValueRef ilevel04
, ilevel14
= NULL
;
2959 LLVMValueRef offsets4
[4] = { NULL
};
2960 unsigned num_lods
= bld4
.num_lods
;
2962 s4
= lp_build_extract_range(gallivm
, newcoords
[0], 4*i
, 4);
2963 t4
= lp_build_extract_range(gallivm
, newcoords
[1], 4*i
, 4);
2964 r4
= lp_build_extract_range(gallivm
, newcoords
[2], 4*i
, 4);
2967 offsets4
[0] = lp_build_extract_range(gallivm
, offsets
[0], 4*i
, 4);
2969 offsets4
[1] = lp_build_extract_range(gallivm
, offsets
[1], 4*i
, 4);
2971 offsets4
[2] = lp_build_extract_range(gallivm
, offsets
[2], 4*i
, 4);
2975 lod_positive4
= lp_build_extract_range(gallivm
, lod_positive
, num_lods
* i
, num_lods
);
2976 ilevel04
= bld
.num_mips
== 1 ? ilevel0
:
2977 lp_build_extract_range(gallivm
, ilevel0
, num_lods
* i
, num_lods
);
2978 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
2979 ilevel14
= lp_build_extract_range(gallivm
, ilevel1
, num_lods
* i
, num_lods
);
2980 lod_fpart4
= lp_build_extract_range(gallivm
, lod_fpart
, num_lods
* i
, num_lods
);
2984 /* do sampling/filtering with fixed pt arithmetic */
2985 lp_build_sample_aos(&bld4
, sampler_index
,
2986 s4
, t4
, r4
, offsets4
,
2987 lod_positive4
, lod_fpart4
,
2993 /* this path is currently unreachable and hence might break easily... */
2994 LLVMValueRef newcoords4
[5];
2998 newcoords4
[3] = lp_build_extract_range(gallivm
, newcoords
[3], 4*i
, 4);
2999 newcoords4
[4] = lp_build_extract_range(gallivm
, newcoords
[4], 4*i
, 4);
3001 lp_build_sample_general(&bld4
, sampler_index
,
3002 op_type
== LP_SAMPLER_OP_GATHER
,
3003 newcoords4
, offsets4
,
3004 lod_positive4
, lod_fpart4
,
3008 for (j
= 0; j
< 4; j
++) {
3009 texelouttmp
[j
][i
] = texelout4
[j
];
3013 for (j
= 0; j
< 4; j
++) {
3014 texel_out
[j
] = lp_build_concat(gallivm
, texelouttmp
[j
], type4
, num_quads
);
3019 if (target
!= PIPE_BUFFER
&& op_type
!= LP_SAMPLER_OP_GATHER
) {
3020 apply_sampler_swizzle(&bld
, texel_out
);
3024 * texel type can be a (32bit) int/uint (for pure int formats only),
3025 * however we are expected to always return floats (storage is untyped).
3027 if (!bld
.texel_type
.floating
) {
3029 for (chan
= 0; chan
< 4; chan
++) {
3030 texel_out
[chan
] = LLVMBuildBitCast(builder
, texel_out
[chan
],
3031 lp_build_vec_type(gallivm
, type
), "");
3037 #define USE_TEX_FUNC_CALL 1
3039 #define LP_MAX_TEX_FUNC_ARGS 32
3042 get_target_info(enum pipe_texture_target target
,
3043 unsigned *num_coords
, unsigned *num_derivs
,
3044 unsigned *num_offsets
, unsigned *layer
)
3046 unsigned dims
= texture_dims(target
);
3048 *num_offsets
= dims
;
3049 *num_derivs
= (target
== PIPE_TEXTURE_CUBE
||
3050 target
== PIPE_TEXTURE_CUBE_ARRAY
) ? 3 : dims
;
3051 *layer
= has_layer_coord(target
) ? 2: 0;
3052 if (target
== PIPE_TEXTURE_CUBE_ARRAY
) {
3054 * dims doesn't include r coord for cubes - this is handled
3055 * by layer instead, but need to fix up for cube arrays...
3064 * Generate the function body for a texture sampling function.
3067 lp_build_sample_gen_func(struct gallivm_state
*gallivm
,
3068 const struct lp_static_texture_state
*static_texture_state
,
3069 const struct lp_static_sampler_state
*static_sampler_state
,
3070 struct lp_sampler_dynamic_state
*dynamic_state
,
3071 struct lp_type type
,
3072 unsigned texture_index
,
3073 unsigned sampler_index
,
3074 LLVMValueRef function
,
3076 unsigned sample_key
)
3078 LLVMBuilderRef old_builder
;
3079 LLVMBasicBlockRef block
;
3080 LLVMValueRef coords
[5];
3081 LLVMValueRef offsets
[3] = { NULL
};
3082 LLVMValueRef lod
= NULL
;
3083 LLVMValueRef context_ptr
;
3084 LLVMValueRef texel_out
[4];
3085 struct lp_derivatives derivs
;
3086 struct lp_derivatives
*deriv_ptr
= NULL
;
3087 unsigned num_param
= 0;
3088 unsigned i
, num_coords
, num_derivs
, num_offsets
, layer
;
3089 enum lp_sampler_lod_control lod_control
;
3091 lod_control
= (sample_key
& LP_SAMPLER_LOD_CONTROL_MASK
) >>
3092 LP_SAMPLER_LOD_CONTROL_SHIFT
;
3094 get_target_info(static_texture_state
->target
,
3095 &num_coords
, &num_derivs
, &num_offsets
, &layer
);
3097 /* "unpack" arguments */
3098 context_ptr
= LLVMGetParam(function
, num_param
++);
3099 for (i
= 0; i
< num_coords
; i
++) {
3100 coords
[i
] = LLVMGetParam(function
, num_param
++);
3102 for (i
= num_coords
; i
< 5; i
++) {
3103 /* This is rather unfortunate... */
3104 coords
[i
] = lp_build_undef(gallivm
, type
);
3107 coords
[layer
] = LLVMGetParam(function
, num_param
++);
3109 if (sample_key
& LP_SAMPLER_SHADOW
) {
3110 coords
[4] = LLVMGetParam(function
, num_param
++);
3112 if (sample_key
& LP_SAMPLER_OFFSETS
) {
3113 for (i
= 0; i
< num_offsets
; i
++) {
3114 offsets
[i
] = LLVMGetParam(function
, num_param
++);
3117 if (lod_control
== LP_SAMPLER_LOD_BIAS
||
3118 lod_control
== LP_SAMPLER_LOD_EXPLICIT
) {
3119 lod
= LLVMGetParam(function
, num_param
++);
3121 else if (lod_control
== LP_SAMPLER_LOD_DERIVATIVES
) {
3122 for (i
= 0; i
< num_derivs
; i
++) {
3123 derivs
.ddx
[i
] = LLVMGetParam(function
, num_param
++);
3124 derivs
.ddy
[i
] = LLVMGetParam(function
, num_param
++);
3126 deriv_ptr
= &derivs
;
3129 assert(num_args
== num_param
);
3135 old_builder
= gallivm
->builder
;
3136 block
= LLVMAppendBasicBlockInContext(gallivm
->context
, function
, "entry");
3137 gallivm
->builder
= LLVMCreateBuilderInContext(gallivm
->context
);
3138 LLVMPositionBuilderAtEnd(gallivm
->builder
, block
);
3140 lp_build_sample_soa_code(gallivm
,
3141 static_texture_state
,
3142 static_sampler_state
,
3155 LLVMBuildAggregateRet(gallivm
->builder
, texel_out
, 4);
3157 LLVMDisposeBuilder(gallivm
->builder
);
3158 gallivm
->builder
= old_builder
;
3160 gallivm_verify_function(gallivm
, function
);
3165 * Call the matching function for texture sampling.
3166 * If there's no match, generate a new one.
3169 lp_build_sample_soa_func(struct gallivm_state
*gallivm
,
3170 const struct lp_static_texture_state
*static_texture_state
,
3171 const struct lp_static_sampler_state
*static_sampler_state
,
3172 struct lp_sampler_dynamic_state
*dynamic_state
,
3173 const struct lp_sampler_params
*params
)
3175 LLVMBuilderRef builder
= gallivm
->builder
;
3176 LLVMModuleRef module
= LLVMGetGlobalParent(LLVMGetBasicBlockParent(
3177 LLVMGetInsertBlock(builder
)));
3178 LLVMValueRef function
, inst
;
3179 LLVMValueRef args
[LP_MAX_TEX_FUNC_ARGS
];
3180 LLVMBasicBlockRef bb
;
3181 LLVMValueRef tex_ret
;
3182 unsigned num_args
= 0;
3184 unsigned i
, num_coords
, num_derivs
, num_offsets
, layer
;
3185 unsigned texture_index
= params
->texture_index
;
3186 unsigned sampler_index
= params
->sampler_index
;
3187 unsigned sample_key
= params
->sample_key
;
3188 const LLVMValueRef
*coords
= params
->coords
;
3189 const LLVMValueRef
*offsets
= params
->offsets
;
3190 const struct lp_derivatives
*derivs
= params
->derivs
;
3191 enum lp_sampler_lod_control lod_control
;
3193 lod_control
= (sample_key
& LP_SAMPLER_LOD_CONTROL_MASK
) >>
3194 LP_SAMPLER_LOD_CONTROL_SHIFT
;
3196 get_target_info(static_texture_state
->target
,
3197 &num_coords
, &num_derivs
, &num_offsets
, &layer
);
3200 * texture function matches are found by name.
3201 * Thus the name has to include both the texture and sampler unit
3202 * (which covers all static state) plus the actual texture function
3203 * (including things like offsets, shadow coord, lod control).
3204 * Additionally lod_property has to be included too.
3207 util_snprintf(func_name
, sizeof(func_name
), "texfunc_res_%d_sam_%d_%x",
3208 texture_index
, sampler_index
, sample_key
);
3210 function
= LLVMGetNamedFunction(module
, func_name
);
3213 LLVMTypeRef arg_types
[LP_MAX_TEX_FUNC_ARGS
];
3214 LLVMTypeRef ret_type
;
3215 LLVMTypeRef function_type
;
3216 LLVMTypeRef val_type
[4];
3217 unsigned num_param
= 0;
3220 * Generate the function prototype.
3223 arg_types
[num_param
++] = LLVMTypeOf(params
->context_ptr
);
3224 for (i
= 0; i
< num_coords
; i
++) {
3225 arg_types
[num_param
++] = LLVMTypeOf(coords
[0]);
3226 assert(LLVMTypeOf(coords
[0]) == LLVMTypeOf(coords
[i
]));
3229 arg_types
[num_param
++] = LLVMTypeOf(coords
[layer
]);
3230 assert(LLVMTypeOf(coords
[0]) == LLVMTypeOf(coords
[layer
]));
3232 if (sample_key
& LP_SAMPLER_SHADOW
) {
3233 arg_types
[num_param
++] = LLVMTypeOf(coords
[0]);
3235 if (sample_key
& LP_SAMPLER_OFFSETS
) {
3236 for (i
= 0; i
< num_offsets
; i
++) {
3237 arg_types
[num_param
++] = LLVMTypeOf(offsets
[0]);
3238 assert(LLVMTypeOf(offsets
[0]) == LLVMTypeOf(offsets
[i
]));
3241 if (lod_control
== LP_SAMPLER_LOD_BIAS
||
3242 lod_control
== LP_SAMPLER_LOD_EXPLICIT
) {
3243 arg_types
[num_param
++] = LLVMTypeOf(params
->lod
);
3245 else if (lod_control
== LP_SAMPLER_LOD_DERIVATIVES
) {
3246 for (i
= 0; i
< num_derivs
; i
++) {
3247 arg_types
[num_param
++] = LLVMTypeOf(derivs
->ddx
[i
]);
3248 arg_types
[num_param
++] = LLVMTypeOf(derivs
->ddy
[i
]);
3249 assert(LLVMTypeOf(derivs
->ddx
[0]) == LLVMTypeOf(derivs
->ddx
[i
]));
3250 assert(LLVMTypeOf(derivs
->ddy
[0]) == LLVMTypeOf(derivs
->ddy
[i
]));
3254 val_type
[0] = val_type
[1] = val_type
[2] = val_type
[3] =
3255 lp_build_vec_type(gallivm
, params
->type
);
3256 ret_type
= LLVMStructTypeInContext(gallivm
->context
, val_type
, 4, 0);
3257 function_type
= LLVMFunctionType(ret_type
, arg_types
, num_param
, 0);
3258 function
= LLVMAddFunction(module
, func_name
, function_type
);
3260 for (i
= 0; i
< num_param
; ++i
) {
3261 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
) {
3262 LLVMAddAttribute(LLVMGetParam(function
, i
), LLVMNoAliasAttribute
);
3266 LLVMSetFunctionCallConv(function
, LLVMFastCallConv
);
3267 LLVMSetLinkage(function
, LLVMPrivateLinkage
);
3269 lp_build_sample_gen_func(gallivm
,
3270 static_texture_state
,
3271 static_sampler_state
,
3282 args
[num_args
++] = params
->context_ptr
;
3283 for (i
= 0; i
< num_coords
; i
++) {
3284 args
[num_args
++] = coords
[i
];
3287 args
[num_args
++] = coords
[layer
];
3289 if (sample_key
& LP_SAMPLER_SHADOW
) {
3290 args
[num_args
++] = coords
[4];
3292 if (sample_key
& LP_SAMPLER_OFFSETS
) {
3293 for (i
= 0; i
< num_offsets
; i
++) {
3294 args
[num_args
++] = offsets
[i
];
3297 if (lod_control
== LP_SAMPLER_LOD_BIAS
||
3298 lod_control
== LP_SAMPLER_LOD_EXPLICIT
) {
3299 args
[num_args
++] = params
->lod
;
3301 else if (lod_control
== LP_SAMPLER_LOD_DERIVATIVES
) {
3302 for (i
= 0; i
< num_derivs
; i
++) {
3303 args
[num_args
++] = derivs
->ddx
[i
];
3304 args
[num_args
++] = derivs
->ddy
[i
];
3308 assert(num_args
<= LP_MAX_TEX_FUNC_ARGS
);
3310 tex_ret
= LLVMBuildCall(builder
, function
, args
, num_args
, "");
3311 bb
= LLVMGetInsertBlock(builder
);
3312 inst
= LLVMGetLastInstruction(bb
);
3313 LLVMSetInstructionCallConv(inst
, LLVMFastCallConv
);
3315 for (i
= 0; i
< 4; i
++) {
3316 params
->texel
[i
] = LLVMBuildExtractValue(gallivm
->builder
, tex_ret
, i
, "");
3322 * Build texture sampling code.
3323 * Either via a function call or inline it directly.
3326 lp_build_sample_soa(const struct lp_static_texture_state
*static_texture_state
,
3327 const struct lp_static_sampler_state
*static_sampler_state
,
3328 struct lp_sampler_dynamic_state
*dynamic_state
,
3329 struct gallivm_state
*gallivm
,
3330 const struct lp_sampler_params
*params
)
3332 boolean use_tex_func
= FALSE
;
3335 * Do not use a function call if the sampling is "simple enough".
3338 * b) no mips (either one level only or no mip filter)
3339 * No mips will definitely make the code smaller, though
3340 * the format requirement is a bit iffy - there's some (SoA) formats
3341 * which definitely generate less code. This does happen to catch
3342 * some important cases though which are hurt quite a bit by using
3343 * a call (though not really because of the call overhead but because
3344 * they are reusing the same texture unit with some of the same
3346 * Ideally we'd let llvm recognize this stuff by doing IPO passes.
3349 if (USE_TEX_FUNC_CALL
) {
3350 const struct util_format_description
*format_desc
;
3351 boolean simple_format
;
3353 enum lp_sampler_op_type op_type
;
3354 format_desc
= util_format_description(static_texture_state
->format
);
3355 simple_format
= !format_desc
||
3356 (util_format_is_rgba8_variant(format_desc
) &&
3357 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
);
3359 op_type
= (params
->sample_key
& LP_SAMPLER_OP_TYPE_MASK
) >>
3360 LP_SAMPLER_OP_TYPE_SHIFT
;
3362 op_type
!= LP_SAMPLER_OP_TEXTURE
||
3363 ((static_sampler_state
->min_mip_filter
== PIPE_TEX_MIPFILTER_NONE
||
3364 static_texture_state
->level_zero_only
== TRUE
) &&
3365 static_sampler_state
->min_img_filter
== static_sampler_state
->mag_img_filter
);
3367 use_tex_func
= format_desc
&& !(simple_format
&& simple_tex
);
3371 lp_build_sample_soa_func(gallivm
,
3372 static_texture_state
,
3373 static_sampler_state
,
3378 lp_build_sample_soa_code(gallivm
,
3379 static_texture_state
,
3380 static_sampler_state
,
3384 params
->texture_index
,
3385 params
->sampler_index
,
3386 params
->context_ptr
,
3397 lp_build_size_query_soa(struct gallivm_state
*gallivm
,
3398 const struct lp_static_texture_state
*static_state
,
3399 struct lp_sampler_dynamic_state
*dynamic_state
,
3400 struct lp_type int_type
,
3401 unsigned texture_unit
,
3403 LLVMValueRef context_ptr
,
3404 boolean is_sviewinfo
,
3405 enum lp_sampler_lod_property lod_property
,
3406 LLVMValueRef explicit_lod
,
3407 LLVMValueRef
*sizes_out
)
3409 LLVMValueRef lod
, level
, size
;
3410 LLVMValueRef first_level
= NULL
;
3413 unsigned num_lods
= 1;
3414 struct lp_build_context bld_int_vec4
;
3416 if (static_state
->format
== PIPE_FORMAT_NONE
) {
3418 * If there's nothing bound, format is NONE, and we must return
3419 * all zero as mandated by d3d10 in this case.
3422 LLVMValueRef zero
= lp_build_const_vec(gallivm
, int_type
, 0.0F
);
3423 for (chan
= 0; chan
< 4; chan
++) {
3424 sizes_out
[chan
] = zero
;
3430 * Do some sanity verification about bound texture and shader dcl target.
3431 * Not entirely sure what's possible but assume array/non-array
3432 * always compatible (probably not ok for OpenGL but d3d10 has no
3433 * distinction of arrays at the resource level).
3434 * Everything else looks bogus (though not entirely sure about rect/2d).
3435 * Currently disabled because it causes assertion failures if there's
3436 * nothing bound (or rather a dummy texture, not that this case would
3437 * return the right values).
3439 if (0 && static_state
->target
!= target
) {
3440 if (static_state
->target
== PIPE_TEXTURE_1D
)
3441 assert(target
== PIPE_TEXTURE_1D_ARRAY
);
3442 else if (static_state
->target
== PIPE_TEXTURE_1D_ARRAY
)
3443 assert(target
== PIPE_TEXTURE_1D
);
3444 else if (static_state
->target
== PIPE_TEXTURE_2D
)
3445 assert(target
== PIPE_TEXTURE_2D_ARRAY
);
3446 else if (static_state
->target
== PIPE_TEXTURE_2D_ARRAY
)
3447 assert(target
== PIPE_TEXTURE_2D
);
3448 else if (static_state
->target
== PIPE_TEXTURE_CUBE
)
3449 assert(target
== PIPE_TEXTURE_CUBE_ARRAY
);
3450 else if (static_state
->target
== PIPE_TEXTURE_CUBE_ARRAY
)
3451 assert(target
== PIPE_TEXTURE_CUBE
);
3456 dims
= texture_dims(target
);
3459 case PIPE_TEXTURE_1D_ARRAY
:
3460 case PIPE_TEXTURE_2D_ARRAY
:
3461 case PIPE_TEXTURE_CUBE_ARRAY
:
3469 assert(!int_type
.floating
);
3471 lp_build_context_init(&bld_int_vec4
, gallivm
, lp_type_int_vec(32, 128));
3474 /* FIXME: this needs to honor per-element lod */
3475 lod
= LLVMBuildExtractElement(gallivm
->builder
, explicit_lod
,
3476 lp_build_const_int32(gallivm
, 0), "");
3477 first_level
= dynamic_state
->first_level(dynamic_state
, gallivm
,
3478 context_ptr
, texture_unit
);
3479 level
= LLVMBuildAdd(gallivm
->builder
, lod
, first_level
, "level");
3480 lod
= lp_build_broadcast_scalar(&bld_int_vec4
, level
);
3482 lod
= bld_int_vec4
.zero
;
3485 size
= bld_int_vec4
.undef
;
3487 size
= LLVMBuildInsertElement(gallivm
->builder
, size
,
3488 dynamic_state
->width(dynamic_state
, gallivm
,
3489 context_ptr
, texture_unit
),
3490 lp_build_const_int32(gallivm
, 0), "");
3493 size
= LLVMBuildInsertElement(gallivm
->builder
, size
,
3494 dynamic_state
->height(dynamic_state
, gallivm
,
3495 context_ptr
, texture_unit
),
3496 lp_build_const_int32(gallivm
, 1), "");
3500 size
= LLVMBuildInsertElement(gallivm
->builder
, size
,
3501 dynamic_state
->depth(dynamic_state
, gallivm
,
3502 context_ptr
, texture_unit
),
3503 lp_build_const_int32(gallivm
, 2), "");
3506 size
= lp_build_minify(&bld_int_vec4
, size
, lod
, TRUE
);
3509 LLVMValueRef layers
= dynamic_state
->depth(dynamic_state
, gallivm
,
3510 context_ptr
, texture_unit
);
3511 if (target
== PIPE_TEXTURE_CUBE_ARRAY
) {
3513 * It looks like GL wants number of cubes, d3d10.1 has it undefined?
3514 * Could avoid this by passing in number of cubes instead of total
3515 * number of layers (might make things easier elsewhere too).
3517 LLVMValueRef six
= lp_build_const_int32(gallivm
, 6);
3518 layers
= LLVMBuildSDiv(gallivm
->builder
, layers
, six
, "");
3520 size
= LLVMBuildInsertElement(gallivm
->builder
, size
, layers
,
3521 lp_build_const_int32(gallivm
, dims
), "");
3525 * d3d10 requires zero for x/y/z values (but not w, i.e. mip levels)
3526 * if level is out of bounds (note this can't cover unbound texture
3527 * here, which also requires returning zero).
3529 if (explicit_lod
&& is_sviewinfo
) {
3530 LLVMValueRef last_level
, out
, out1
;
3531 struct lp_build_context leveli_bld
;
3533 /* everything is scalar for now */
3534 lp_build_context_init(&leveli_bld
, gallivm
, lp_type_int_vec(32, 32));
3535 last_level
= dynamic_state
->last_level(dynamic_state
, gallivm
,
3536 context_ptr
, texture_unit
);
3538 out
= lp_build_cmp(&leveli_bld
, PIPE_FUNC_LESS
, level
, first_level
);
3539 out1
= lp_build_cmp(&leveli_bld
, PIPE_FUNC_GREATER
, level
, last_level
);
3540 out
= lp_build_or(&leveli_bld
, out
, out1
);
3541 if (num_lods
== 1) {
3542 out
= lp_build_broadcast_scalar(&bld_int_vec4
, out
);
3548 size
= lp_build_andnot(&bld_int_vec4
, size
, out
);
3550 for (i
= 0; i
< dims
+ (has_array
? 1 : 0); i
++) {
3551 sizes_out
[i
] = lp_build_extract_broadcast(gallivm
, bld_int_vec4
.type
, int_type
,
3553 lp_build_const_int32(gallivm
, i
));
3556 for (; i
< 4; i
++) {
3557 sizes_out
[i
] = lp_build_const_vec(gallivm
, int_type
, 0.0);
3562 * if there's no explicit_lod (buffers, rects) queries requiring nr of
3563 * mips would be illegal.
3565 if (is_sviewinfo
&& explicit_lod
) {
3566 struct lp_build_context bld_int_scalar
;
3567 LLVMValueRef num_levels
;
3568 lp_build_context_init(&bld_int_scalar
, gallivm
, lp_type_int(32));
3570 if (static_state
->level_zero_only
) {
3571 num_levels
= bld_int_scalar
.one
;
3574 LLVMValueRef last_level
;
3576 last_level
= dynamic_state
->last_level(dynamic_state
, gallivm
,
3577 context_ptr
, texture_unit
);
3578 num_levels
= lp_build_sub(&bld_int_scalar
, last_level
, first_level
);
3579 num_levels
= lp_build_add(&bld_int_scalar
, num_levels
, bld_int_scalar
.one
);
3581 sizes_out
[3] = lp_build_broadcast(gallivm
, lp_build_vec_type(gallivm
, int_type
),