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 "lp_bld_debug.h"
46 #include "lp_bld_type.h"
47 #include "lp_bld_const.h"
48 #include "lp_bld_conv.h"
49 #include "lp_bld_arit.h"
50 #include "lp_bld_bitarit.h"
51 #include "lp_bld_logic.h"
52 #include "lp_bld_printf.h"
53 #include "lp_bld_swizzle.h"
54 #include "lp_bld_flow.h"
55 #include "lp_bld_gather.h"
56 #include "lp_bld_format.h"
57 #include "lp_bld_sample.h"
58 #include "lp_bld_sample_aos.h"
59 #include "lp_bld_struct.h"
60 #include "lp_bld_quad.h"
61 #include "lp_bld_pack.h"
65 * Generate code to fetch a texel from a texture at int coords (x, y, z).
66 * The computation depends on whether the texture is 1D, 2D or 3D.
67 * The result, texel, will be float vectors:
68 * texel[0] = red values
69 * texel[1] = green values
70 * texel[2] = blue values
71 * texel[3] = alpha values
74 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_sampler_static_state
*static_state
= bld
->static_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 LLVMValueRef border_color_ptr
=
184 bld
->dynamic_state
->border_color(bld
->dynamic_state
,
187 for (chan
= 0; chan
< 4; chan
++) {
188 LLVMValueRef border_chan
=
189 lp_build_array_get(bld
->gallivm
, border_color_ptr
,
190 lp_build_const_int32(bld
->gallivm
, chan
));
191 LLVMValueRef border_chan_vec
=
192 lp_build_broadcast_scalar(&bld
->float_vec_bld
, border_chan
);
194 if (!bld
->texel_type
.floating
) {
195 border_chan_vec
= LLVMBuildBitCast(builder
, border_chan_vec
,
196 bld
->texel_bld
.vec_type
, "");
198 texel_out
[chan
] = lp_build_select(&bld
->texel_bld
, use_border
,
199 border_chan_vec
, texel_out
[chan
]);
206 * Helper to compute the mirror function for the PIPE_WRAP_MIRROR modes.
209 lp_build_coord_mirror(struct lp_build_sample_context
*bld
,
212 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
213 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
214 LLVMValueRef fract
, flr
, isOdd
;
216 lp_build_ifloor_fract(coord_bld
, coord
, &flr
, &fract
);
218 /* isOdd = flr & 1 */
219 isOdd
= LLVMBuildAnd(bld
->gallivm
->builder
, flr
, int_coord_bld
->one
, "");
221 /* make coord positive or negative depending on isOdd */
222 coord
= lp_build_set_sign(coord_bld
, fract
, isOdd
);
224 /* convert isOdd to float */
225 isOdd
= lp_build_int_to_float(coord_bld
, isOdd
);
227 /* add isOdd to coord */
228 coord
= lp_build_add(coord_bld
, coord
, isOdd
);
235 * Helper to compute the first coord and the weight for
236 * linear wrap repeat npot textures
239 lp_build_coord_repeat_npot_linear(struct lp_build_sample_context
*bld
,
240 LLVMValueRef coord_f
,
241 LLVMValueRef length_i
,
242 LLVMValueRef length_f
,
243 LLVMValueRef
*coord0_i
,
244 LLVMValueRef
*weight_f
)
246 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
247 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
248 LLVMValueRef half
= lp_build_const_vec(bld
->gallivm
, coord_bld
->type
, 0.5);
249 LLVMValueRef length_minus_one
= lp_build_sub(int_coord_bld
, length_i
,
252 /* wrap with normalized floats is just fract */
253 coord_f
= lp_build_fract(coord_bld
, coord_f
);
254 /* mul by size and subtract 0.5 */
255 coord_f
= lp_build_mul(coord_bld
, coord_f
, length_f
);
256 coord_f
= lp_build_sub(coord_bld
, coord_f
, half
);
258 * we avoided the 0.5/length division before the repeat wrap,
259 * now need to fix up edge cases with selects
261 /* convert to int, compute lerp weight */
262 lp_build_ifloor_fract(coord_bld
, coord_f
, coord0_i
, weight_f
);
263 mask
= lp_build_compare(int_coord_bld
->gallivm
, int_coord_bld
->type
,
264 PIPE_FUNC_LESS
, *coord0_i
, int_coord_bld
->zero
);
265 *coord0_i
= lp_build_select(int_coord_bld
, mask
, length_minus_one
, *coord0_i
);
270 * Build LLVM code for texture wrap mode for linear filtering.
271 * \param x0_out returns first integer texcoord
272 * \param x1_out returns second integer texcoord
273 * \param weight_out returns linear interpolation weight
276 lp_build_sample_wrap_linear(struct lp_build_sample_context
*bld
,
279 LLVMValueRef length_f
,
282 LLVMValueRef
*x0_out
,
283 LLVMValueRef
*x1_out
,
284 LLVMValueRef
*weight_out
)
286 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
287 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
288 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
289 LLVMValueRef half
= lp_build_const_vec(bld
->gallivm
, coord_bld
->type
, 0.5);
290 LLVMValueRef length_minus_one
= lp_build_sub(int_coord_bld
, length
, int_coord_bld
->one
);
291 LLVMValueRef coord0
, coord1
, weight
;
294 case PIPE_TEX_WRAP_REPEAT
:
296 /* mul by size and subtract 0.5 */
297 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
298 coord
= lp_build_sub(coord_bld
, coord
, half
);
299 /* convert to int, compute lerp weight */
300 lp_build_ifloor_fract(coord_bld
, coord
, &coord0
, &weight
);
301 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
303 coord0
= LLVMBuildAnd(builder
, coord0
, length_minus_one
, "");
304 coord1
= LLVMBuildAnd(builder
, coord1
, length_minus_one
, "");
308 lp_build_coord_repeat_npot_linear(bld
, coord
,
311 mask
= lp_build_compare(int_coord_bld
->gallivm
, int_coord_bld
->type
,
312 PIPE_FUNC_NOTEQUAL
, coord0
, length_minus_one
);
313 coord1
= LLVMBuildAnd(builder
,
314 lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
),
319 case PIPE_TEX_WRAP_CLAMP
:
320 if (bld
->static_state
->normalized_coords
) {
321 /* scale coord to length */
322 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
325 /* clamp to [0, length] */
326 coord
= lp_build_clamp(coord_bld
, coord
, coord_bld
->zero
, length_f
);
328 coord
= lp_build_sub(coord_bld
, coord
, half
);
330 /* convert to int, compute lerp weight */
331 lp_build_ifloor_fract(coord_bld
, coord
, &coord0
, &weight
);
332 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
335 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
337 struct lp_build_context abs_coord_bld
= bld
->coord_bld
;
338 abs_coord_bld
.type
.sign
= FALSE
;
340 if (bld
->static_state
->normalized_coords
) {
341 /* mul by tex size */
342 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
344 /* clamp to length max */
345 coord
= lp_build_min(coord_bld
, coord
, length_f
);
347 coord
= lp_build_sub(coord_bld
, coord
, half
);
348 /* clamp to [0, length - 0.5] */
349 coord
= lp_build_max(coord_bld
, coord
, coord_bld
->zero
);
350 /* convert to int, compute lerp weight */
351 lp_build_ifloor_fract(&abs_coord_bld
, coord
, &coord0
, &weight
);
352 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
353 /* coord1 = min(coord1, length-1) */
354 coord1
= lp_build_min(int_coord_bld
, coord1
, length_minus_one
);
358 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
359 if (bld
->static_state
->normalized_coords
) {
360 /* scale coord to length */
361 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
363 /* was: clamp to [-0.5, length + 0.5], then sub 0.5 */
364 /* can skip clamp (though might not work for very large coord values */
365 coord
= lp_build_sub(coord_bld
, coord
, half
);
366 /* convert to int, compute lerp weight */
367 lp_build_ifloor_fract(coord_bld
, coord
, &coord0
, &weight
);
368 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
371 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
372 /* compute mirror function */
373 coord
= lp_build_coord_mirror(bld
, coord
);
375 /* scale coord to length */
376 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
377 coord
= lp_build_sub(coord_bld
, coord
, half
);
379 /* convert to int, compute lerp weight */
380 lp_build_ifloor_fract(coord_bld
, coord
, &coord0
, &weight
);
381 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
383 /* coord0 = max(coord0, 0) */
384 coord0
= lp_build_max(int_coord_bld
, coord0
, int_coord_bld
->zero
);
385 /* coord1 = min(coord1, length-1) */
386 coord1
= lp_build_min(int_coord_bld
, coord1
, length_minus_one
);
389 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
390 coord
= lp_build_abs(coord_bld
, coord
);
392 if (bld
->static_state
->normalized_coords
) {
393 /* scale coord to length */
394 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
397 /* clamp to [0, length] */
398 coord
= lp_build_min(coord_bld
, coord
, length_f
);
400 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_CLAMP_TO_EDGE
:
409 LLVMValueRef min
, max
;
410 struct lp_build_context abs_coord_bld
= bld
->coord_bld
;
411 abs_coord_bld
.type
.sign
= FALSE
;
412 coord
= lp_build_abs(coord_bld
, coord
);
414 if (bld
->static_state
->normalized_coords
) {
415 /* scale coord to length */
416 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
419 /* clamp to [0.5, length - 0.5] */
421 max
= lp_build_sub(coord_bld
, length_f
, min
);
422 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
424 coord
= lp_build_sub(coord_bld
, coord
, half
);
426 /* convert to int, compute lerp weight */
427 lp_build_ifloor_fract(&abs_coord_bld
, coord
, &coord0
, &weight
);
428 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
432 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
434 coord
= lp_build_abs(coord_bld
, coord
);
436 if (bld
->static_state
->normalized_coords
) {
437 /* scale coord to length */
438 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
441 /* was: clamp to [-0.5, length + 0.5] then sub 0.5 */
442 /* skip clamp - always positive, and other side
443 only potentially matters for very large coords */
444 coord
= lp_build_sub(coord_bld
, coord
, half
);
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
);
461 *weight_out
= weight
;
466 * Build LLVM code for texture wrap mode for nearest filtering.
467 * \param coord the incoming texcoord (nominally in [0,1])
468 * \param length the texture size along one dimension, as int vector
469 * \param is_pot if TRUE, length is a power of two
470 * \param wrap_mode one of PIPE_TEX_WRAP_x
473 lp_build_sample_wrap_nearest(struct lp_build_sample_context
*bld
,
476 LLVMValueRef length_f
,
480 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
481 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
482 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
483 LLVMValueRef length_minus_one
= lp_build_sub(int_coord_bld
, length
, int_coord_bld
->one
);
487 case PIPE_TEX_WRAP_REPEAT
:
489 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
490 icoord
= lp_build_ifloor(coord_bld
, coord
);
491 icoord
= LLVMBuildAnd(builder
, icoord
, length_minus_one
, "");
494 /* take fraction, unnormalize */
495 coord
= lp_build_fract_safe(coord_bld
, coord
);
496 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
497 icoord
= lp_build_itrunc(coord_bld
, coord
);
501 case PIPE_TEX_WRAP_CLAMP
:
502 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
503 if (bld
->static_state
->normalized_coords
) {
504 /* scale coord to length */
505 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
509 /* use itrunc instead since we clamp to 0 anyway */
510 icoord
= lp_build_itrunc(coord_bld
, coord
);
512 /* clamp to [0, length - 1]. */
513 icoord
= lp_build_clamp(int_coord_bld
, icoord
, int_coord_bld
->zero
,
517 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
518 if (bld
->static_state
->normalized_coords
) {
519 /* scale coord to length */
520 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
522 /* no clamp necessary, border masking will handle this */
523 icoord
= lp_build_ifloor(coord_bld
, coord
);
526 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
527 /* compute mirror function */
528 coord
= lp_build_coord_mirror(bld
, coord
);
530 /* scale coord to length */
531 assert(bld
->static_state
->normalized_coords
);
532 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
534 /* itrunc == ifloor here */
535 icoord
= lp_build_itrunc(coord_bld
, coord
);
537 /* clamp to [0, length - 1] */
538 icoord
= lp_build_min(int_coord_bld
, icoord
, length_minus_one
);
541 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
542 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
543 coord
= lp_build_abs(coord_bld
, coord
);
545 if (bld
->static_state
->normalized_coords
) {
546 /* scale coord to length */
547 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
550 /* itrunc == ifloor here */
551 icoord
= lp_build_itrunc(coord_bld
, coord
);
553 /* clamp to [0, length - 1] */
554 icoord
= lp_build_min(int_coord_bld
, icoord
, length_minus_one
);
557 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
558 coord
= lp_build_abs(coord_bld
, coord
);
560 if (bld
->static_state
->normalized_coords
) {
561 /* scale coord to length */
562 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
565 /* itrunc == ifloor here */
566 icoord
= lp_build_itrunc(coord_bld
, coord
);
579 * Generate code to sample a mipmap level with nearest filtering.
580 * If sampling a cube texture, r = cube face in [0,5].
583 lp_build_sample_image_nearest(struct lp_build_sample_context
*bld
,
586 LLVMValueRef row_stride_vec
,
587 LLVMValueRef img_stride_vec
,
588 LLVMValueRef data_ptr
,
589 LLVMValueRef mipoffsets
,
593 LLVMValueRef colors_out
[4])
595 const unsigned dims
= bld
->dims
;
596 LLVMValueRef width_vec
;
597 LLVMValueRef height_vec
;
598 LLVMValueRef depth_vec
;
599 LLVMValueRef flt_size
;
600 LLVMValueRef flt_width_vec
;
601 LLVMValueRef flt_height_vec
;
602 LLVMValueRef flt_depth_vec
;
603 LLVMValueRef x
, y
= NULL
, z
= NULL
;
605 lp_build_extract_image_sizes(bld
,
609 &width_vec
, &height_vec
, &depth_vec
);
611 flt_size
= lp_build_int_to_float(&bld
->float_size_bld
, size
);
613 lp_build_extract_image_sizes(bld
,
614 &bld
->float_size_bld
,
617 &flt_width_vec
, &flt_height_vec
, &flt_depth_vec
);
620 * Compute integer texcoords.
622 x
= lp_build_sample_wrap_nearest(bld
, s
, width_vec
, flt_width_vec
,
623 bld
->static_state
->pot_width
,
624 bld
->static_state
->wrap_s
);
625 lp_build_name(x
, "tex.x.wrapped");
628 y
= lp_build_sample_wrap_nearest(bld
, t
, height_vec
, flt_height_vec
,
629 bld
->static_state
->pot_height
,
630 bld
->static_state
->wrap_t
);
631 lp_build_name(y
, "tex.y.wrapped");
634 z
= lp_build_sample_wrap_nearest(bld
, r
, depth_vec
, flt_depth_vec
,
635 bld
->static_state
->pot_depth
,
636 bld
->static_state
->wrap_r
);
637 lp_build_name(z
, "tex.z.wrapped");
640 if (bld
->static_state
->target
== PIPE_TEXTURE_CUBE
||
641 bld
->static_state
->target
== PIPE_TEXTURE_1D_ARRAY
||
642 bld
->static_state
->target
== PIPE_TEXTURE_2D_ARRAY
) {
644 lp_build_name(z
, "tex.z.layer");
648 * Get texture colors.
650 lp_build_sample_texel_soa(bld
, unit
,
651 width_vec
, height_vec
, depth_vec
,
653 row_stride_vec
, img_stride_vec
,
654 data_ptr
, mipoffsets
, colors_out
);
659 * Generate code to sample a mipmap level with linear filtering.
660 * If sampling a cube texture, r = cube face in [0,5].
663 lp_build_sample_image_linear(struct lp_build_sample_context
*bld
,
666 LLVMValueRef row_stride_vec
,
667 LLVMValueRef img_stride_vec
,
668 LLVMValueRef data_ptr
,
669 LLVMValueRef mipoffsets
,
673 LLVMValueRef colors_out
[4])
675 const unsigned dims
= bld
->dims
;
676 LLVMValueRef width_vec
;
677 LLVMValueRef height_vec
;
678 LLVMValueRef depth_vec
;
679 LLVMValueRef flt_size
;
680 LLVMValueRef flt_width_vec
;
681 LLVMValueRef flt_height_vec
;
682 LLVMValueRef flt_depth_vec
;
683 LLVMValueRef x0
, y0
= NULL
, z0
= NULL
, x1
, y1
= NULL
, z1
= NULL
;
684 LLVMValueRef s_fpart
, t_fpart
= NULL
, r_fpart
= NULL
;
685 LLVMValueRef neighbors
[2][2][4];
688 lp_build_extract_image_sizes(bld
,
692 &width_vec
, &height_vec
, &depth_vec
);
694 flt_size
= lp_build_int_to_float(&bld
->float_size_bld
, size
);
696 lp_build_extract_image_sizes(bld
,
697 &bld
->float_size_bld
,
700 &flt_width_vec
, &flt_height_vec
, &flt_depth_vec
);
703 * Compute integer texcoords.
705 lp_build_sample_wrap_linear(bld
, s
, width_vec
, flt_width_vec
,
706 bld
->static_state
->pot_width
,
707 bld
->static_state
->wrap_s
,
709 lp_build_name(x0
, "tex.x0.wrapped");
710 lp_build_name(x1
, "tex.x1.wrapped");
713 lp_build_sample_wrap_linear(bld
, t
, height_vec
, flt_height_vec
,
714 bld
->static_state
->pot_height
,
715 bld
->static_state
->wrap_t
,
717 lp_build_name(y0
, "tex.y0.wrapped");
718 lp_build_name(y1
, "tex.y1.wrapped");
721 lp_build_sample_wrap_linear(bld
, r
, depth_vec
, flt_depth_vec
,
722 bld
->static_state
->pot_depth
,
723 bld
->static_state
->wrap_r
,
725 lp_build_name(z0
, "tex.z0.wrapped");
726 lp_build_name(z1
, "tex.z1.wrapped");
729 if (bld
->static_state
->target
== PIPE_TEXTURE_CUBE
||
730 bld
->static_state
->target
== PIPE_TEXTURE_1D_ARRAY
||
731 bld
->static_state
->target
== PIPE_TEXTURE_2D_ARRAY
) {
732 z0
= z1
= r
; /* cube face or array layer */
733 lp_build_name(z0
, "tex.z0.layer");
734 lp_build_name(z1
, "tex.z1.layer");
739 * Get texture colors.
741 /* get x0/x1 texels */
742 lp_build_sample_texel_soa(bld
, unit
,
743 width_vec
, height_vec
, depth_vec
,
745 row_stride_vec
, img_stride_vec
,
746 data_ptr
, mipoffsets
, neighbors
[0][0]);
747 lp_build_sample_texel_soa(bld
, unit
,
748 width_vec
, height_vec
, depth_vec
,
750 row_stride_vec
, img_stride_vec
,
751 data_ptr
, mipoffsets
, neighbors
[0][1]);
754 /* Interpolate two samples from 1D image to produce one color */
755 for (chan
= 0; chan
< 4; chan
++) {
756 colors_out
[chan
] = lp_build_lerp(&bld
->texel_bld
, s_fpart
,
757 neighbors
[0][0][chan
],
758 neighbors
[0][1][chan
]);
763 LLVMValueRef colors0
[4];
765 /* get x0/x1 texels at y1 */
766 lp_build_sample_texel_soa(bld
, unit
,
767 width_vec
, height_vec
, depth_vec
,
769 row_stride_vec
, img_stride_vec
,
770 data_ptr
, mipoffsets
, neighbors
[1][0]);
771 lp_build_sample_texel_soa(bld
, unit
,
772 width_vec
, height_vec
, depth_vec
,
774 row_stride_vec
, img_stride_vec
,
775 data_ptr
, mipoffsets
, neighbors
[1][1]);
777 /* Bilinear interpolate the four samples from the 2D image / 3D slice */
778 for (chan
= 0; chan
< 4; chan
++) {
779 colors0
[chan
] = lp_build_lerp_2d(&bld
->texel_bld
,
781 neighbors
[0][0][chan
],
782 neighbors
[0][1][chan
],
783 neighbors
[1][0][chan
],
784 neighbors
[1][1][chan
]);
788 LLVMValueRef neighbors1
[2][2][4];
789 LLVMValueRef colors1
[4];
791 /* get x0/x1/y0/y1 texels at z1 */
792 lp_build_sample_texel_soa(bld
, unit
,
793 width_vec
, height_vec
, depth_vec
,
795 row_stride_vec
, img_stride_vec
,
796 data_ptr
, mipoffsets
, neighbors1
[0][0]);
797 lp_build_sample_texel_soa(bld
, unit
,
798 width_vec
, height_vec
, depth_vec
,
800 row_stride_vec
, img_stride_vec
,
801 data_ptr
, mipoffsets
, neighbors1
[0][1]);
802 lp_build_sample_texel_soa(bld
, unit
,
803 width_vec
, height_vec
, depth_vec
,
805 row_stride_vec
, img_stride_vec
,
806 data_ptr
, mipoffsets
, neighbors1
[1][0]);
807 lp_build_sample_texel_soa(bld
, unit
,
808 width_vec
, height_vec
, depth_vec
,
810 row_stride_vec
, img_stride_vec
,
811 data_ptr
, mipoffsets
, neighbors1
[1][1]);
813 /* Bilinear interpolate the four samples from the second Z slice */
814 for (chan
= 0; chan
< 4; chan
++) {
815 colors1
[chan
] = lp_build_lerp_2d(&bld
->texel_bld
,
817 neighbors1
[0][0][chan
],
818 neighbors1
[0][1][chan
],
819 neighbors1
[1][0][chan
],
820 neighbors1
[1][1][chan
]);
823 /* Linearly interpolate the two samples from the two 3D slices */
824 for (chan
= 0; chan
< 4; chan
++) {
825 colors_out
[chan
] = lp_build_lerp(&bld
->texel_bld
,
827 colors0
[chan
], colors1
[chan
]);
832 for (chan
= 0; chan
< 4; chan
++) {
833 colors_out
[chan
] = colors0
[chan
];
841 * Sample the texture/mipmap using given image filter and mip filter.
842 * data0_ptr and data1_ptr point to the two mipmap levels to sample
843 * from. width0/1_vec, height0/1_vec, depth0/1_vec indicate their sizes.
844 * If we're using nearest miplevel sampling the '1' values will be null/unused.
847 lp_build_sample_mipmap(struct lp_build_sample_context
*bld
,
854 LLVMValueRef ilevel0
,
855 LLVMValueRef ilevel1
,
856 LLVMValueRef lod_fpart
,
857 LLVMValueRef
*colors_out
)
859 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
860 LLVMValueRef size0
= NULL
;
861 LLVMValueRef size1
= NULL
;
862 LLVMValueRef row_stride0_vec
= NULL
;
863 LLVMValueRef row_stride1_vec
= NULL
;
864 LLVMValueRef img_stride0_vec
= NULL
;
865 LLVMValueRef img_stride1_vec
= NULL
;
866 LLVMValueRef data_ptr0
= NULL
;
867 LLVMValueRef data_ptr1
= NULL
;
868 LLVMValueRef mipoff0
= NULL
;
869 LLVMValueRef mipoff1
= NULL
;
870 LLVMValueRef colors0
[4], colors1
[4];
873 /* sample the first mipmap level */
874 lp_build_mipmap_level_sizes(bld
, ilevel0
,
876 &row_stride0_vec
, &img_stride0_vec
);
877 if (bld
->num_lods
== 1) {
878 data_ptr0
= lp_build_get_mipmap_level(bld
, ilevel0
);
881 /* This path should work for num_lods 1 too but slightly less efficient */
882 data_ptr0
= bld
->base_ptr
;
883 mipoff0
= lp_build_get_mip_offsets(bld
, ilevel0
);
885 if (img_filter
== PIPE_TEX_FILTER_NEAREST
) {
886 lp_build_sample_image_nearest(bld
, unit
,
888 row_stride0_vec
, img_stride0_vec
,
889 data_ptr0
, mipoff0
, s
, t
, r
,
893 assert(img_filter
== PIPE_TEX_FILTER_LINEAR
);
894 lp_build_sample_image_linear(bld
, unit
,
896 row_stride0_vec
, img_stride0_vec
,
897 data_ptr0
, mipoff0
, s
, t
, r
,
901 /* Store the first level's colors in the output variables */
902 for (chan
= 0; chan
< 4; chan
++) {
903 LLVMBuildStore(builder
, colors0
[chan
], colors_out
[chan
]);
906 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
907 struct lp_build_if_state if_ctx
;
908 LLVMValueRef need_lerp
;
909 unsigned num_quads
= bld
->coord_bld
.type
.length
/ 4;
911 /* need_lerp = lod_fpart > 0 */
912 if (num_quads
== 1) {
913 need_lerp
= LLVMBuildFCmp(builder
, LLVMRealUGT
,
914 lod_fpart
, bld
->perquadf_bld
.zero
,
919 * We'll do mip filtering if any of the quads need it.
920 * It might be better to split the vectors here and only fetch/filter
921 * quads which need it.
924 * We unfortunately need to clamp lod_fpart here since we can get
925 * negative values which would screw up filtering if not all
926 * lod_fpart values have same sign.
928 lod_fpart
= lp_build_max(&bld
->perquadf_bld
, lod_fpart
,
929 bld
->perquadf_bld
.zero
);
930 need_lerp
= lp_build_compare(bld
->gallivm
, bld
->perquadf_bld
.type
,
932 lod_fpart
, bld
->perquadf_bld
.zero
);
933 need_lerp
= lp_build_any_true_range(&bld
->perquadi_bld
, num_quads
, need_lerp
);
936 lp_build_if(&if_ctx
, bld
->gallivm
, need_lerp
);
938 /* sample the second mipmap level */
939 lp_build_mipmap_level_sizes(bld
, ilevel1
,
941 &row_stride1_vec
, &img_stride1_vec
);
942 if (bld
->num_lods
== 1) {
943 data_ptr1
= lp_build_get_mipmap_level(bld
, ilevel1
);
946 data_ptr1
= bld
->base_ptr
;
947 mipoff1
= lp_build_get_mip_offsets(bld
, ilevel1
);
949 if (img_filter
== PIPE_TEX_FILTER_NEAREST
) {
950 lp_build_sample_image_nearest(bld
, unit
,
952 row_stride1_vec
, img_stride1_vec
,
953 data_ptr1
, mipoff1
, s
, t
, r
,
957 lp_build_sample_image_linear(bld
, unit
,
959 row_stride1_vec
, img_stride1_vec
,
960 data_ptr1
, mipoff1
, s
, t
, r
,
964 /* interpolate samples from the two mipmap levels */
966 lod_fpart
= lp_build_unpack_broadcast_aos_scalars(bld
->gallivm
,
967 bld
->perquadf_bld
.type
,
971 for (chan
= 0; chan
< 4; chan
++) {
972 colors0
[chan
] = lp_build_lerp(&bld
->texel_bld
, lod_fpart
,
973 colors0
[chan
], colors1
[chan
]);
974 LLVMBuildStore(builder
, colors0
[chan
], colors_out
[chan
]);
977 lp_build_endif(&if_ctx
);
983 * Clamp layer coord to valid values.
986 lp_build_layer_coord(struct lp_build_sample_context
*bld
,
990 LLVMValueRef maxlayer
;
992 maxlayer
= bld
->dynamic_state
->depth(bld
->dynamic_state
,
994 maxlayer
= lp_build_sub(&bld
->int_bld
, maxlayer
, bld
->int_bld
.one
);
995 maxlayer
= lp_build_broadcast_scalar(&bld
->int_coord_bld
, maxlayer
);
996 return lp_build_clamp(&bld
->int_coord_bld
, layer
,
997 bld
->int_coord_bld
.zero
, maxlayer
);
1003 * Calculate cube face, lod, mip levels.
1006 lp_build_sample_common(struct lp_build_sample_context
*bld
,
1011 const struct lp_derivatives
*derivs
,
1012 LLVMValueRef lod_bias
, /* optional */
1013 LLVMValueRef explicit_lod
, /* optional */
1014 LLVMValueRef
*lod_ipart
,
1015 LLVMValueRef
*lod_fpart
,
1016 LLVMValueRef
*ilevel0
,
1017 LLVMValueRef
*ilevel1
)
1019 const unsigned mip_filter
= bld
->static_state
->min_mip_filter
;
1020 const unsigned min_filter
= bld
->static_state
->min_img_filter
;
1021 const unsigned mag_filter
= bld
->static_state
->mag_img_filter
;
1022 const unsigned target
= bld
->static_state
->target
;
1023 LLVMValueRef first_level
;
1024 struct lp_derivatives face_derivs
;
1027 printf("%s mip %d min %d mag %d\n", __FUNCTION__,
1028 mip_filter, min_filter, mag_filter);
1032 * Choose cube face, recompute texcoords and derivatives for the chosen face.
1034 if (target
== PIPE_TEXTURE_CUBE
) {
1035 LLVMValueRef face
, face_s
, face_t
;
1036 lp_build_cube_lookup(bld
, *s
, *t
, *r
, &face
, &face_s
, &face_t
);
1037 *s
= face_s
; /* vec */
1038 *t
= face_t
; /* vec */
1039 /* use 'r' to indicate cube face */
1040 *r
= face
; /* vec */
1042 /* recompute ddx, ddy using the new (s,t) face texcoords */
1043 face_derivs
.ddx_ddy
[0] = lp_build_packed_ddx_ddy_twocoord(&bld
->coord_bld
, *s
, *t
);
1044 face_derivs
.ddx_ddy
[1] = NULL
;
1045 derivs
= &face_derivs
;
1047 else if (target
== PIPE_TEXTURE_1D_ARRAY
) {
1048 *r
= lp_build_iround(&bld
->coord_bld
, *t
);
1049 *r
= lp_build_layer_coord(bld
, unit
, *r
);
1051 else if (target
== PIPE_TEXTURE_2D_ARRAY
) {
1052 *r
= lp_build_iround(&bld
->coord_bld
, *r
);
1053 *r
= lp_build_layer_coord(bld
, unit
, *r
);
1057 * Compute the level of detail (float).
1059 if (min_filter
!= mag_filter
||
1060 mip_filter
!= PIPE_TEX_MIPFILTER_NONE
) {
1061 /* Need to compute lod either to choose mipmap levels or to
1062 * distinguish between minification/magnification with one mipmap level.
1064 lp_build_lod_selector(bld
, unit
, derivs
,
1065 lod_bias
, explicit_lod
,
1067 lod_ipart
, lod_fpart
);
1069 *lod_ipart
= bld
->perquadi_bld
.zero
;
1073 * Compute integer mipmap level(s) to fetch texels from: ilevel0, ilevel1
1075 switch (mip_filter
) {
1077 assert(0 && "bad mip_filter value in lp_build_sample_soa()");
1079 case PIPE_TEX_MIPFILTER_NONE
:
1080 /* always use mip level 0 */
1081 if (target
== PIPE_TEXTURE_CUBE
) {
1082 /* XXX this is a work-around for an apparent bug in LLVM 2.7.
1083 * We should be able to set ilevel0 = const(0) but that causes
1084 * bad x86 code to be emitted.
1085 * XXX should probably disable that on other llvm versions.
1088 lp_build_nearest_mip_level(bld
, unit
, *lod_ipart
, ilevel0
);
1091 first_level
= bld
->dynamic_state
->first_level(bld
->dynamic_state
,
1092 bld
->gallivm
, unit
);
1093 first_level
= lp_build_broadcast_scalar(&bld
->perquadi_bld
, first_level
);
1094 *ilevel0
= first_level
;
1097 case PIPE_TEX_MIPFILTER_NEAREST
:
1099 lp_build_nearest_mip_level(bld
, unit
, *lod_ipart
, ilevel0
);
1101 case PIPE_TEX_MIPFILTER_LINEAR
:
1104 lp_build_linear_mip_levels(bld
, unit
,
1105 *lod_ipart
, lod_fpart
,
1112 * General texture sampling codegen.
1113 * This function handles texture sampling for all texture targets (1D,
1114 * 2D, 3D, cube) and all filtering modes.
1117 lp_build_sample_general(struct lp_build_sample_context
*bld
,
1122 LLVMValueRef lod_ipart
,
1123 LLVMValueRef lod_fpart
,
1124 LLVMValueRef ilevel0
,
1125 LLVMValueRef ilevel1
,
1126 LLVMValueRef
*colors_out
)
1128 struct lp_build_context
*int_bld
= &bld
->int_bld
;
1129 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
1130 const unsigned mip_filter
= bld
->static_state
->min_mip_filter
;
1131 const unsigned min_filter
= bld
->static_state
->min_img_filter
;
1132 const unsigned mag_filter
= bld
->static_state
->mag_img_filter
;
1133 LLVMValueRef texels
[4];
1137 * Get/interpolate texture colors.
1140 for (chan
= 0; chan
< 4; ++chan
) {
1141 texels
[chan
] = lp_build_alloca(bld
->gallivm
, bld
->texel_bld
.vec_type
, "");
1142 lp_build_name(texels
[chan
], "sampler%u_texel_%c_var", unit
, "xyzw"[chan
]);
1145 if (min_filter
== mag_filter
) {
1146 /* no need to distinguish between minification and magnification */
1147 lp_build_sample_mipmap(bld
, unit
,
1148 min_filter
, mip_filter
,
1150 ilevel0
, ilevel1
, lod_fpart
,
1154 /* Emit conditional to choose min image filter or mag image filter
1155 * depending on the lod being > 0 or <= 0, respectively.
1157 struct lp_build_if_state if_ctx
;
1158 LLVMValueRef minify
;
1161 * XXX this should to all lods into account, if some are min
1162 * some max probably could hack up the coords/weights in the linear
1163 * path with selects to work for nearest.
1164 * If that's just two quads sitting next to each other it seems
1165 * quite ok to do the same filtering method on both though, at
1166 * least unless we have explicit lod (and who uses different
1167 * min/mag filter with that?)
1169 if (bld
->num_lods
> 1)
1170 lod_ipart
= LLVMBuildExtractElement(builder
, lod_ipart
,
1171 lp_build_const_int32(bld
->gallivm
, 0), "");
1173 /* minify = lod >= 0.0 */
1174 minify
= LLVMBuildICmp(builder
, LLVMIntSGE
,
1175 lod_ipart
, int_bld
->zero
, "");
1177 lp_build_if(&if_ctx
, bld
->gallivm
, minify
);
1179 /* Use the minification filter */
1180 lp_build_sample_mipmap(bld
, unit
,
1181 min_filter
, mip_filter
,
1183 ilevel0
, ilevel1
, lod_fpart
,
1186 lp_build_else(&if_ctx
);
1188 /* Use the magnification filter */
1189 lp_build_sample_mipmap(bld
, unit
,
1190 mag_filter
, PIPE_TEX_MIPFILTER_NONE
,
1192 ilevel0
, NULL
, NULL
,
1195 lp_build_endif(&if_ctx
);
1198 for (chan
= 0; chan
< 4; ++chan
) {
1199 colors_out
[chan
] = LLVMBuildLoad(builder
, texels
[chan
], "");
1200 lp_build_name(colors_out
[chan
], "sampler%u_texel_%c", unit
, "xyzw"[chan
]);
1206 * Texel fetch function.
1207 * In contrast to general sampling there is no filtering, no coord minification,
1208 * lod (if any) is always explicit uint, coords are uints (in terms of texel units)
1209 * directly to be applied to the selected mip level (after adding texel offsets).
1210 * This function handles texel fetch for all targets where texel fetch is supported
1211 * (no cube maps, but 1d, 2d, 3d are supported, arrays and buffers should be too).
1214 lp_build_fetch_texel(struct lp_build_sample_context
*bld
,
1216 const LLVMValueRef
*coords
,
1217 LLVMValueRef explicit_lod
,
1218 const LLVMValueRef
*offsets
,
1219 LLVMValueRef
*colors_out
)
1221 struct lp_build_context
*perquadi_bld
= &bld
->perquadi_bld
;
1222 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
1223 unsigned dims
= bld
->dims
, chan
;
1224 unsigned target
= bld
->static_state
->target
;
1225 LLVMValueRef size
, ilevel
;
1226 LLVMValueRef row_stride_vec
= NULL
, img_stride_vec
= NULL
;
1227 LLVMValueRef x
= coords
[0], y
= coords
[1], z
= coords
[2];
1228 LLVMValueRef width
, height
, depth
, i
, j
;
1229 LLVMValueRef offset
, out_of_bounds
, out1
;
1231 /* XXX just like ordinary sampling, we don't handle per-pixel lod (yet). */
1232 if (explicit_lod
&& bld
->static_state
->target
!= PIPE_BUFFER
) {
1233 ilevel
= lp_build_pack_aos_scalars(bld
->gallivm
, int_coord_bld
->type
,
1234 perquadi_bld
->type
, explicit_lod
, 0);
1235 lp_build_nearest_mip_level(bld
, unit
, ilevel
, &ilevel
);
1239 ilevel
= lp_build_const_int32(bld
->gallivm
, 0);
1241 lp_build_mipmap_level_sizes(bld
, ilevel
,
1243 &row_stride_vec
, &img_stride_vec
);
1244 lp_build_extract_image_sizes(bld
, &bld
->int_size_bld
, int_coord_bld
->type
,
1245 size
, &width
, &height
, &depth
);
1247 if (target
== PIPE_TEXTURE_1D_ARRAY
||
1248 target
== PIPE_TEXTURE_2D_ARRAY
) {
1249 if (target
== PIPE_TEXTURE_1D_ARRAY
) {
1250 z
= lp_build_layer_coord(bld
, unit
, y
);
1253 z
= lp_build_layer_coord(bld
, unit
, z
);
1257 /* This is a lot like border sampling */
1259 /* XXX coords are really unsigned, offsets are signed */
1260 x
= lp_build_add(int_coord_bld
, x
, offsets
[0]);
1262 out_of_bounds
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, x
, int_coord_bld
->zero
);
1263 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, x
, width
);
1264 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
1268 y
= lp_build_add(int_coord_bld
, y
, offsets
[1]);
1270 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, y
, int_coord_bld
->zero
);
1271 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
1272 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, y
, height
);
1273 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
1277 z
= lp_build_add(int_coord_bld
, z
, offsets
[2]);
1279 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, z
, int_coord_bld
->zero
);
1280 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
1281 out1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, z
, depth
);
1282 out_of_bounds
= lp_build_or(int_coord_bld
, out_of_bounds
, out1
);
1286 lp_build_sample_offset(int_coord_bld
,
1288 x
, y
, z
, row_stride_vec
, img_stride_vec
,
1291 if (bld
->static_state
->target
!= PIPE_BUFFER
) {
1292 offset
= lp_build_add(int_coord_bld
, offset
,
1293 lp_build_get_mip_offsets(bld
, ilevel
));
1296 offset
= lp_build_andnot(int_coord_bld
, offset
, out_of_bounds
);
1298 lp_build_fetch_rgba_soa(bld
->gallivm
,
1301 bld
->base_ptr
, offset
,
1307 * Not needed except for ARB_robust_buffer_access_behavior.
1308 * Could use min/max above instead of out-of-bounds comparisons
1309 * (in fact cast to unsigned and min only is sufficient)
1310 * if we don't care about the result returned for out-of-bounds.
1312 for (chan
= 0; chan
< 4; chan
++) {
1313 colors_out
[chan
] = lp_build_select(&bld
->texel_bld
, out_of_bounds
,
1314 bld
->texel_bld
.zero
, colors_out
[chan
]);
1321 * Do shadow test/comparison.
1322 * \param coords incoming texcoords
1323 * \param texel the texel to compare against (use the X channel)
1324 * Ideally this should really be done per-sample.
1327 lp_build_sample_compare(struct lp_build_sample_context
*bld
,
1328 const LLVMValueRef
*coords
,
1329 LLVMValueRef texel
[4])
1331 struct lp_build_context
*texel_bld
= &bld
->texel_bld
;
1332 LLVMBuilderRef builder
= bld
->gallivm
->builder
;
1333 LLVMValueRef res
, p
;
1334 const unsigned chan
= 0;
1336 if (bld
->static_state
->compare_mode
== PIPE_TEX_COMPARE_NONE
)
1339 if (bld
->static_state
->target
== PIPE_TEXTURE_2D_ARRAY
||
1340 bld
->static_state
->target
== PIPE_TEXTURE_CUBE
) {
1349 LLVMValueRef indx
= lp_build_const_int32(bld
->gallivm
, 0);
1350 LLVMValueRef coord
= LLVMBuildExtractElement(builder
, p
, indx
, "");
1351 LLVMValueRef tex
= LLVMBuildExtractElement(builder
, texel
[chan
], indx
, "");
1352 lp_build_printf(bld
->gallivm
, "shadow compare coord %f to texture %f\n",
1356 /* Clamp p coords to [0,1] */
1357 p
= lp_build_clamp(&bld
->coord_bld
, p
,
1358 bld
->coord_bld
.zero
,
1359 bld
->coord_bld
.one
);
1361 /* result = (p FUNC texel) ? 1 : 0 */
1362 res
= lp_build_cmp(texel_bld
, bld
->static_state
->compare_func
,
1364 res
= lp_build_select(texel_bld
, res
, texel_bld
->one
, texel_bld
->zero
);
1366 /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */
1370 texel
[3] = texel_bld
->one
;
1375 * Just set texels to white instead of actually sampling the texture.
1379 lp_build_sample_nop(struct gallivm_state
*gallivm
,
1380 struct lp_type type
,
1381 const LLVMValueRef
*coords
,
1382 LLVMValueRef texel_out
[4])
1384 LLVMValueRef one
= lp_build_one(gallivm
, type
);
1387 for (chan
= 0; chan
< 4; chan
++) {
1388 texel_out
[chan
] = one
;
1394 * Build texture sampling code.
1395 * 'texel' will return a vector of four LLVMValueRefs corresponding to
1397 * \param type vector float type to use for coords, etc.
1398 * \param is_fetch if this is a texel fetch instruction.
1399 * \param derivs partial derivatives of (s,t,r,q) with respect to x and y
1402 lp_build_sample_soa(struct gallivm_state
*gallivm
,
1403 const struct lp_sampler_static_state
*static_state
,
1404 struct lp_sampler_dynamic_state
*dynamic_state
,
1405 struct lp_type type
,
1408 const LLVMValueRef
*coords
,
1409 const LLVMValueRef
*offsets
,
1410 const struct lp_derivatives
*derivs
,
1411 LLVMValueRef lod_bias
, /* optional */
1412 LLVMValueRef explicit_lod
, /* optional */
1413 LLVMValueRef texel_out
[4])
1415 unsigned dims
= texture_dims(static_state
->target
);
1416 unsigned num_quads
= type
.length
/ 4;
1417 unsigned mip_filter
= static_state
->min_mip_filter
;
1418 struct lp_build_sample_context bld
;
1419 LLVMTypeRef i32t
= LLVMInt32TypeInContext(gallivm
->context
);
1420 LLVMBuilderRef builder
= gallivm
->builder
;
1421 LLVMValueRef tex_width
, tex_height
, tex_depth
;
1427 enum pipe_format fmt
= static_state
->format
;
1428 debug_printf("Sample from %s\n", util_format_name(fmt
));
1431 assert(type
.floating
);
1433 /* Setup our build context */
1434 memset(&bld
, 0, sizeof bld
);
1435 bld
.gallivm
= gallivm
;
1436 bld
.static_state
= static_state
;
1437 bld
.dynamic_state
= dynamic_state
;
1438 bld
.format_desc
= util_format_description(static_state
->format
);
1441 bld
.vector_width
= lp_type_width(type
);
1443 bld
.float_type
= lp_type_float(32);
1444 bld
.int_type
= lp_type_int(32);
1445 bld
.coord_type
= type
;
1446 bld
.int_coord_type
= lp_int_type(type
);
1447 bld
.float_size_in_type
= lp_type_float(32);
1448 bld
.float_size_in_type
.length
= dims
> 1 ? 4 : 1;
1449 bld
.int_size_in_type
= lp_int_type(bld
.float_size_in_type
);
1450 bld
.texel_type
= type
;
1451 bld
.perquadf_type
= type
;
1452 /* we want native vector size to be able to use our intrinsics */
1453 bld
.perquadf_type
.length
= type
.length
> 4 ? ((type
.length
+ 15) / 16) * 4 : 1;
1454 bld
.perquadi_type
= lp_int_type(bld
.perquadf_type
);
1456 /* always using the first channel hopefully should be safe,
1457 * if not things WILL break in other places anyway.
1459 if (bld
.format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
&&
1460 bld
.format_desc
->channel
[0].pure_integer
) {
1461 if (bld
.format_desc
->channel
[0].type
== UTIL_FORMAT_TYPE_SIGNED
) {
1462 bld
.texel_type
= lp_type_int_vec(type
.width
, type
.width
* type
.length
);
1464 else if (bld
.format_desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
) {
1465 bld
.texel_type
= lp_type_uint_vec(type
.width
, type
.width
* type
.length
);
1470 * There are other situations where at least the multiple int lods could be
1471 * avoided like min and max lod being equal.
1473 if ((is_fetch
&& explicit_lod
&& bld
.static_state
->target
!= PIPE_BUFFER
) ||
1474 (!is_fetch
&& mip_filter
!= PIPE_TEX_MIPFILTER_NONE
)) {
1475 bld
.num_lods
= num_quads
;
1481 bld
.float_size_type
= bld
.float_size_in_type
;
1482 bld
.float_size_type
.length
= bld
.num_lods
> 1 ? type
.length
:
1483 bld
.float_size_in_type
.length
;
1484 bld
.int_size_type
= lp_int_type(bld
.float_size_type
);
1486 lp_build_context_init(&bld
.float_bld
, gallivm
, bld
.float_type
);
1487 lp_build_context_init(&bld
.float_vec_bld
, gallivm
, type
);
1488 lp_build_context_init(&bld
.int_bld
, gallivm
, bld
.int_type
);
1489 lp_build_context_init(&bld
.coord_bld
, gallivm
, bld
.coord_type
);
1490 lp_build_context_init(&bld
.int_coord_bld
, gallivm
, bld
.int_coord_type
);
1491 lp_build_context_init(&bld
.int_size_in_bld
, gallivm
, bld
.int_size_in_type
);
1492 lp_build_context_init(&bld
.float_size_in_bld
, gallivm
, bld
.float_size_in_type
);
1493 lp_build_context_init(&bld
.int_size_bld
, gallivm
, bld
.int_size_type
);
1494 lp_build_context_init(&bld
.float_size_bld
, gallivm
, bld
.float_size_type
);
1495 lp_build_context_init(&bld
.texel_bld
, gallivm
, bld
.texel_type
);
1496 lp_build_context_init(&bld
.perquadf_bld
, gallivm
, bld
.perquadf_type
);
1497 lp_build_context_init(&bld
.perquadi_bld
, gallivm
, bld
.perquadi_type
);
1499 /* Get the dynamic state */
1500 tex_width
= dynamic_state
->width(dynamic_state
, gallivm
, unit
);
1501 tex_height
= dynamic_state
->height(dynamic_state
, gallivm
, unit
);
1502 tex_depth
= dynamic_state
->depth(dynamic_state
, gallivm
, unit
);
1503 bld
.row_stride_array
= dynamic_state
->row_stride(dynamic_state
, gallivm
, unit
);
1504 bld
.img_stride_array
= dynamic_state
->img_stride(dynamic_state
, gallivm
, unit
);
1505 bld
.base_ptr
= dynamic_state
->base_ptr(dynamic_state
, gallivm
, unit
);
1506 bld
.mip_offsets
= dynamic_state
->mip_offsets(dynamic_state
, gallivm
, unit
);
1507 /* Note that mip_offsets is an array[level] of offsets to texture images */
1513 /* width, height, depth as single int vector */
1515 bld
.int_size
= tex_width
;
1518 bld
.int_size
= LLVMBuildInsertElement(builder
, bld
.int_size_in_bld
.undef
,
1519 tex_width
, LLVMConstInt(i32t
, 0, 0), "");
1521 bld
.int_size
= LLVMBuildInsertElement(builder
, bld
.int_size
,
1522 tex_height
, LLVMConstInt(i32t
, 1, 0), "");
1524 bld
.int_size
= LLVMBuildInsertElement(builder
, bld
.int_size
,
1525 tex_depth
, LLVMConstInt(i32t
, 2, 0), "");
1531 /* For debug: no-op texture sampling */
1532 lp_build_sample_nop(gallivm
,
1538 else if (is_fetch
) {
1539 lp_build_fetch_texel(&bld
, unit
, coords
,
1540 explicit_lod
, offsets
,
1545 LLVMValueRef lod_ipart
= NULL
, lod_fpart
= NULL
;
1546 LLVMValueRef ilevel0
= NULL
, ilevel1
= NULL
;
1547 boolean use_aos
= util_format_fits_8unorm(bld
.format_desc
) &&
1548 lp_is_simple_wrap_mode(static_state
->wrap_s
) &&
1549 lp_is_simple_wrap_mode(static_state
->wrap_t
);
1551 if ((gallivm_debug
& GALLIVM_DEBUG_PERF
) &&
1552 !use_aos
&& util_format_fits_8unorm(bld
.format_desc
)) {
1553 debug_printf("%s: using floating point linear filtering for %s\n",
1554 __FUNCTION__
, bld
.format_desc
->short_name
);
1555 debug_printf(" min_img %d mag_img %d mip %d wraps %d wrapt %d\n",
1556 static_state
->min_img_filter
,
1557 static_state
->mag_img_filter
,
1558 static_state
->min_mip_filter
,
1559 static_state
->wrap_s
,
1560 static_state
->wrap_t
);
1563 lp_build_sample_common(&bld
, unit
,
1565 derivs
, lod_bias
, explicit_lod
,
1566 &lod_ipart
, &lod_fpart
,
1567 &ilevel0
, &ilevel1
);
1570 * we only try 8-wide sampling with soa as it appears to
1571 * be a loss with aos with AVX (but it should work).
1572 * (It should be faster if we'd support avx2)
1574 if (num_quads
== 1 || !use_aos
) {
1576 if (num_quads
> 1) {
1577 if (mip_filter
== PIPE_TEX_MIPFILTER_NONE
) {
1578 LLVMValueRef index0
= lp_build_const_int32(gallivm
, 0);
1580 * These parameters are the same for all quads,
1581 * could probably simplify.
1583 lod_ipart
= LLVMBuildExtractElement(builder
, lod_ipart
, index0
, "");
1584 ilevel0
= LLVMBuildExtractElement(builder
, ilevel0
, index0
, "");
1588 /* do sampling/filtering with fixed pt arithmetic */
1589 lp_build_sample_aos(&bld
, unit
,
1591 lod_ipart
, lod_fpart
,
1597 lp_build_sample_general(&bld
, unit
,
1599 lod_ipart
, lod_fpart
,
1606 struct lp_build_sample_context bld4
;
1607 struct lp_type type4
= type
;
1609 LLVMValueRef texelout4
[4];
1610 LLVMValueRef texelouttmp
[4][LP_MAX_VECTOR_LENGTH
/16];
1614 /* Setup our build context */
1615 memset(&bld4
, 0, sizeof bld4
);
1616 bld4
.gallivm
= bld
.gallivm
;
1617 bld4
.static_state
= bld
.static_state
;
1618 bld4
.dynamic_state
= bld
.dynamic_state
;
1619 bld4
.format_desc
= bld
.format_desc
;
1620 bld4
.dims
= bld
.dims
;
1621 bld4
.row_stride_array
= bld
.row_stride_array
;
1622 bld4
.img_stride_array
= bld
.img_stride_array
;
1623 bld4
.base_ptr
= bld
.base_ptr
;
1624 bld4
.mip_offsets
= bld
.mip_offsets
;
1625 bld4
.int_size
= bld
.int_size
;
1627 bld4
.vector_width
= lp_type_width(type4
);
1629 bld4
.float_type
= lp_type_float(32);
1630 bld4
.int_type
= lp_type_int(32);
1631 bld4
.coord_type
= type4
;
1632 bld4
.int_coord_type
= lp_int_type(type4
);
1633 bld4
.float_size_in_type
= lp_type_float(32);
1634 bld4
.float_size_in_type
.length
= dims
> 1 ? 4 : 1;
1635 bld4
.int_size_in_type
= lp_int_type(bld4
.float_size_in_type
);
1636 bld4
.texel_type
= bld
.texel_type
;
1637 bld4
.texel_type
.length
= 4;
1638 bld4
.perquadf_type
= type4
;
1639 /* we want native vector size to be able to use our intrinsics */
1640 bld4
.perquadf_type
.length
= 1;
1641 bld4
.perquadi_type
= lp_int_type(bld4
.perquadf_type
);
1644 bld4
.int_size_type
= bld4
.int_size_in_type
;
1645 bld4
.float_size_type
= bld4
.float_size_in_type
;
1647 lp_build_context_init(&bld4
.float_bld
, gallivm
, bld4
.float_type
);
1648 lp_build_context_init(&bld4
.float_vec_bld
, gallivm
, type4
);
1649 lp_build_context_init(&bld4
.int_bld
, gallivm
, bld4
.int_type
);
1650 lp_build_context_init(&bld4
.coord_bld
, gallivm
, bld4
.coord_type
);
1651 lp_build_context_init(&bld4
.int_coord_bld
, gallivm
, bld4
.int_coord_type
);
1652 lp_build_context_init(&bld4
.int_size_in_bld
, gallivm
, bld4
.int_size_in_type
);
1653 lp_build_context_init(&bld4
.float_size_in_bld
, gallivm
, bld4
.float_size_in_type
);
1654 lp_build_context_init(&bld4
.int_size_bld
, gallivm
, bld4
.int_size_type
);
1655 lp_build_context_init(&bld4
.float_size_bld
, gallivm
, bld4
.float_size_type
);
1656 lp_build_context_init(&bld4
.texel_bld
, gallivm
, bld4
.texel_type
);
1657 lp_build_context_init(&bld4
.perquadf_bld
, gallivm
, bld4
.perquadf_type
);
1658 lp_build_context_init(&bld4
.perquadi_bld
, gallivm
, bld4
.perquadi_type
);
1660 for (i
= 0; i
< num_quads
; i
++) {
1661 LLVMValueRef s4
, t4
, r4
;
1662 LLVMValueRef lod_iparts
, lod_fparts
= NULL
;
1663 LLVMValueRef ilevel0s
, ilevel1s
= NULL
;
1664 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
1666 s4
= lp_build_extract_range(gallivm
, s
, 4*i
, 4);
1667 t4
= lp_build_extract_range(gallivm
, t
, 4*i
, 4);
1668 r4
= lp_build_extract_range(gallivm
, r
, 4*i
, 4);
1669 lod_iparts
= LLVMBuildExtractElement(builder
, lod_ipart
, indexi
, "");
1670 ilevel0s
= LLVMBuildExtractElement(builder
, ilevel0
, indexi
, "");
1671 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
1672 ilevel1s
= LLVMBuildExtractElement(builder
, ilevel1
, indexi
, "");
1673 lod_fparts
= LLVMBuildExtractElement(builder
, lod_fpart
, indexi
, "");
1677 /* do sampling/filtering with fixed pt arithmetic */
1678 lp_build_sample_aos(&bld4
, unit
,
1680 lod_iparts
, lod_fparts
,
1686 lp_build_sample_general(&bld4
, unit
,
1688 lod_iparts
, lod_fparts
,
1692 for (j
= 0; j
< 4; j
++) {
1693 texelouttmp
[j
][i
] = texelout4
[j
];
1697 for (j
= 0; j
< 4; j
++) {
1698 texel_out
[j
] = lp_build_concat(gallivm
, texelouttmp
[j
], type4
, num_quads
);
1702 lp_build_sample_compare(&bld
, coords
, texel_out
);
1705 if (static_state
->target
!= PIPE_BUFFER
) {
1706 apply_sampler_swizzle(&bld
, texel_out
);
1710 * texel type can be a (32bit) int/uint (for pure int formats only),
1711 * however we are expected to always return floats (storage is untyped).
1713 if (!bld
.texel_type
.floating
) {
1715 for (chan
= 0; chan
< 4; chan
++) {
1716 texel_out
[chan
] = LLVMBuildBitCast(builder
, texel_out
[chan
],
1717 lp_build_vec_type(gallivm
, type
), "");
1723 lp_build_size_query_soa(struct gallivm_state
*gallivm
,
1724 const struct lp_sampler_static_state
*static_state
,
1725 struct lp_sampler_dynamic_state
*dynamic_state
,
1726 struct lp_type int_type
,
1728 LLVMValueRef explicit_lod
,
1729 LLVMValueRef
*sizes_out
)
1734 boolean has_array
= FALSE
;
1735 struct lp_build_context bld_int_vec
;
1737 switch (static_state
->target
) {
1738 case PIPE_TEXTURE_1D
:
1742 case PIPE_TEXTURE_1D_ARRAY
:
1746 case PIPE_TEXTURE_2D
:
1747 case PIPE_TEXTURE_CUBE
:
1748 case PIPE_TEXTURE_RECT
:
1751 case PIPE_TEXTURE_3D
:
1754 case PIPE_TEXTURE_2D_ARRAY
:
1763 assert(!int_type
.floating
);
1765 lp_build_context_init(&bld_int_vec
, gallivm
, lp_type_int_vec(32, 128));
1768 LLVMValueRef first_level
;
1769 lod
= LLVMBuildExtractElement(gallivm
->builder
, explicit_lod
, lp_build_const_int32(gallivm
, 0), "");
1770 first_level
= dynamic_state
->first_level(dynamic_state
, gallivm
, unit
);
1771 lod
= lp_build_broadcast_scalar(&bld_int_vec
,
1772 LLVMBuildAdd(gallivm
->builder
, lod
, first_level
, "lod"));
1775 lod
= bld_int_vec
.zero
;
1778 size
= bld_int_vec
.undef
;
1780 size
= LLVMBuildInsertElement(gallivm
->builder
, size
,
1781 dynamic_state
->width(dynamic_state
, gallivm
, unit
),
1782 lp_build_const_int32(gallivm
, 0), "");
1785 size
= LLVMBuildInsertElement(gallivm
->builder
, size
,
1786 dynamic_state
->height(dynamic_state
, gallivm
, unit
),
1787 lp_build_const_int32(gallivm
, 1), "");
1791 size
= LLVMBuildInsertElement(gallivm
->builder
, size
,
1792 dynamic_state
->depth(dynamic_state
, gallivm
, unit
),
1793 lp_build_const_int32(gallivm
, 2), "");
1796 size
= lp_build_minify(&bld_int_vec
, size
, lod
);
1799 size
= LLVMBuildInsertElement(gallivm
->builder
, size
,
1800 dynamic_state
->depth(dynamic_state
, gallivm
, unit
),
1801 lp_build_const_int32(gallivm
, dims
), "");
1803 for (i
= 0; i
< dims
+ (has_array
? 1 : 0); i
++) {
1804 sizes_out
[i
] = lp_build_extract_broadcast(gallivm
, bld_int_vec
.type
, int_type
,
1806 lp_build_const_int32(gallivm
, i
));