1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
5 * Copyright 2008-2010 VMware, Inc. All rights reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
37 #include "pipe/p_context.h"
38 #include "pipe/p_defines.h"
39 #include "pipe/p_shader_tokens.h"
40 #include "util/u_math.h"
41 #include "util/u_memory.h"
42 #include "sp_quad.h" /* only for #define QUAD_* tokens */
43 #include "sp_tex_sample.h"
44 #include "sp_tex_tile_cache.h"
49 * Return fractional part of 'f'. Used for computing interpolation weights.
50 * Need to be careful with negative values.
51 * Note, if this function isn't perfect you'll sometimes see 1-pixel bands
52 * of improperly weighted linear-filtered textures.
53 * The tests/texwrap.c demo is a good test.
58 return f
- util_ifloor(f
);
64 * Linear interpolation macro
67 lerp(float a
, float v0
, float v1
)
69 return v0
+ a
* (v1
- v0
);
74 * Do 2D/biliner interpolation of float values.
75 * v00, v10, v01 and v11 are typically four texture samples in a square/box.
76 * a and b are the horizontal and vertical interpolants.
77 * It's important that this function is inlined when compiled with
78 * optimization! If we find that's not true on some systems, convert
82 lerp_2d(float a
, float b
,
83 float v00
, float v10
, float v01
, float v11
)
85 const float temp0
= lerp(a
, v00
, v10
);
86 const float temp1
= lerp(a
, v01
, v11
);
87 return lerp(b
, temp0
, temp1
);
92 * As above, but 3D interpolation of 8 values.
95 lerp_3d(float a
, float b
, float c
,
96 float v000
, float v100
, float v010
, float v110
,
97 float v001
, float v101
, float v011
, float v111
)
99 const float temp0
= lerp_2d(a
, b
, v000
, v100
, v010
, v110
);
100 const float temp1
= lerp_2d(a
, b
, v001
, v101
, v011
, v111
);
101 return lerp(c
, temp0
, temp1
);
107 * Compute coord % size for repeat wrap modes.
108 * Note that if coord is a signed integer, coord % size doesn't give
109 * the right value for coord < 0 (in terms of texture repeat). Just
110 * casting to unsigned fixes that.
113 repeat(int coord
, unsigned size
)
115 return (int) ((unsigned) coord
% size
);
120 * Apply texture coord wrapping mode and return integer texture indexes
121 * for a vector of four texcoords (S or T or P).
122 * \param wrapMode PIPE_TEX_WRAP_x
123 * \param s the incoming texcoords
124 * \param size the texture image size
125 * \param icoord returns the integer texcoords
126 * \return integer texture index
129 wrap_nearest_repeat(const float s
[4], unsigned size
, int icoord
[4])
132 /* s limited to [0,1) */
133 /* i limited to [0,size-1] */
134 for (ch
= 0; ch
< 4; ch
++) {
135 int i
= util_ifloor(s
[ch
] * size
);
136 icoord
[ch
] = repeat(i
, size
);
142 wrap_nearest_clamp(const float s
[4], unsigned size
, int icoord
[4])
145 /* s limited to [0,1] */
146 /* i limited to [0,size-1] */
147 for (ch
= 0; ch
< 4; ch
++) {
150 else if (s
[ch
] >= 1.0F
)
151 icoord
[ch
] = size
- 1;
153 icoord
[ch
] = util_ifloor(s
[ch
] * size
);
159 wrap_nearest_clamp_to_edge(const float s
[4], unsigned size
, int icoord
[4])
162 /* s limited to [min,max] */
163 /* i limited to [0, size-1] */
164 const float min
= 1.0F
/ (2.0F
* size
);
165 const float max
= 1.0F
- min
;
166 for (ch
= 0; ch
< 4; ch
++) {
169 else if (s
[ch
] > max
)
170 icoord
[ch
] = size
- 1;
172 icoord
[ch
] = util_ifloor(s
[ch
] * size
);
178 wrap_nearest_clamp_to_border(const float s
[4], unsigned size
, int icoord
[4])
181 /* s limited to [min,max] */
182 /* i limited to [-1, size] */
183 const float min
= -1.0F
/ (2.0F
* size
);
184 const float max
= 1.0F
- min
;
185 for (ch
= 0; ch
< 4; ch
++) {
188 else if (s
[ch
] >= max
)
191 icoord
[ch
] = util_ifloor(s
[ch
] * size
);
197 wrap_nearest_mirror_repeat(const float s
[4], unsigned size
, int icoord
[4])
200 const float min
= 1.0F
/ (2.0F
* size
);
201 const float max
= 1.0F
- min
;
202 for (ch
= 0; ch
< 4; ch
++) {
203 const int flr
= util_ifloor(s
[ch
]);
206 u
= 1.0F
- (s
[ch
] - (float) flr
);
208 u
= s
[ch
] - (float) flr
;
212 icoord
[ch
] = size
- 1;
214 icoord
[ch
] = util_ifloor(u
* size
);
220 wrap_nearest_mirror_clamp(const float s
[4], unsigned size
, int icoord
[4])
223 for (ch
= 0; ch
< 4; ch
++) {
224 /* s limited to [0,1] */
225 /* i limited to [0,size-1] */
226 const float u
= fabsf(s
[ch
]);
230 icoord
[ch
] = size
- 1;
232 icoord
[ch
] = util_ifloor(u
* size
);
238 wrap_nearest_mirror_clamp_to_edge(const float s
[4], unsigned size
,
242 /* s limited to [min,max] */
243 /* i limited to [0, size-1] */
244 const float min
= 1.0F
/ (2.0F
* size
);
245 const float max
= 1.0F
- min
;
246 for (ch
= 0; ch
< 4; ch
++) {
247 const float u
= fabsf(s
[ch
]);
251 icoord
[ch
] = size
- 1;
253 icoord
[ch
] = util_ifloor(u
* size
);
259 wrap_nearest_mirror_clamp_to_border(const float s
[4], unsigned size
,
263 /* s limited to [min,max] */
264 /* i limited to [0, size-1] */
265 const float min
= -1.0F
/ (2.0F
* size
);
266 const float max
= 1.0F
- min
;
267 for (ch
= 0; ch
< 4; ch
++) {
268 const float u
= fabsf(s
[ch
]);
274 icoord
[ch
] = util_ifloor(u
* size
);
280 * Used to compute texel locations for linear sampling for four texcoords.
281 * \param wrapMode PIPE_TEX_WRAP_x
282 * \param s the texcoords
283 * \param size the texture image size
284 * \param icoord0 returns first texture indexes
285 * \param icoord1 returns second texture indexes (usually icoord0 + 1)
286 * \param w returns blend factor/weight between texture indexes
287 * \param icoord returns the computed integer texture coords
290 wrap_linear_repeat(const float s
[4], unsigned size
,
291 int icoord0
[4], int icoord1
[4], float w
[4])
294 for (ch
= 0; ch
< 4; ch
++) {
295 float u
= s
[ch
] * size
- 0.5F
;
296 icoord0
[ch
] = repeat(util_ifloor(u
), size
);
297 icoord1
[ch
] = repeat(icoord0
[ch
] + 1, size
);
304 wrap_linear_clamp(const float s
[4], unsigned size
,
305 int icoord0
[4], int icoord1
[4], float w
[4])
308 for (ch
= 0; ch
< 4; ch
++) {
309 float u
= CLAMP(s
[ch
], 0.0F
, 1.0F
);
311 icoord0
[ch
] = util_ifloor(u
);
312 icoord1
[ch
] = icoord0
[ch
] + 1;
319 wrap_linear_clamp_to_edge(const float s
[4], unsigned size
,
320 int icoord0
[4], int icoord1
[4], float w
[4])
323 for (ch
= 0; ch
< 4; ch
++) {
324 float u
= CLAMP(s
[ch
], 0.0F
, 1.0F
);
326 icoord0
[ch
] = util_ifloor(u
);
327 icoord1
[ch
] = icoord0
[ch
] + 1;
330 if (icoord1
[ch
] >= (int) size
)
331 icoord1
[ch
] = size
- 1;
338 wrap_linear_clamp_to_border(const float s
[4], unsigned size
,
339 int icoord0
[4], int icoord1
[4], float w
[4])
341 const float min
= -1.0F
/ (2.0F
* size
);
342 const float max
= 1.0F
- min
;
344 for (ch
= 0; ch
< 4; ch
++) {
345 float u
= CLAMP(s
[ch
], min
, max
);
347 icoord0
[ch
] = util_ifloor(u
);
348 icoord1
[ch
] = icoord0
[ch
] + 1;
355 wrap_linear_mirror_repeat(const float s
[4], unsigned size
,
356 int icoord0
[4], int icoord1
[4], float w
[4])
359 for (ch
= 0; ch
< 4; ch
++) {
360 const int flr
= util_ifloor(s
[ch
]);
363 u
= 1.0F
- (s
[ch
] - (float) flr
);
365 u
= s
[ch
] - (float) flr
;
367 icoord0
[ch
] = util_ifloor(u
);
368 icoord1
[ch
] = icoord0
[ch
] + 1;
371 if (icoord1
[ch
] >= (int) size
)
372 icoord1
[ch
] = size
- 1;
379 wrap_linear_mirror_clamp(const float s
[4], unsigned size
,
380 int icoord0
[4], int icoord1
[4], float w
[4])
383 for (ch
= 0; ch
< 4; ch
++) {
384 float u
= fabsf(s
[ch
]);
390 icoord0
[ch
] = util_ifloor(u
);
391 icoord1
[ch
] = icoord0
[ch
] + 1;
398 wrap_linear_mirror_clamp_to_edge(const float s
[4], unsigned size
,
399 int icoord0
[4], int icoord1
[4], float w
[4])
402 for (ch
= 0; ch
< 4; ch
++) {
403 float u
= fabsf(s
[ch
]);
409 icoord0
[ch
] = util_ifloor(u
);
410 icoord1
[ch
] = icoord0
[ch
] + 1;
413 if (icoord1
[ch
] >= (int) size
)
414 icoord1
[ch
] = size
- 1;
421 wrap_linear_mirror_clamp_to_border(const float s
[4], unsigned size
,
422 int icoord0
[4], int icoord1
[4], float w
[4])
424 const float min
= -1.0F
/ (2.0F
* size
);
425 const float max
= 1.0F
- min
;
427 for (ch
= 0; ch
< 4; ch
++) {
428 float u
= fabsf(s
[ch
]);
436 icoord0
[ch
] = util_ifloor(u
);
437 icoord1
[ch
] = icoord0
[ch
] + 1;
444 * For RECT textures / unnormalized texcoords
445 * Only a subset of wrap modes supported.
448 wrap_nearest_unorm_clamp(const float s
[4], unsigned size
, int icoord
[4])
451 for (ch
= 0; ch
< 4; ch
++) {
452 int i
= util_ifloor(s
[ch
]);
453 icoord
[ch
]= CLAMP(i
, 0, (int) size
-1);
459 * Handles clamp_to_edge and clamp_to_border:
462 wrap_nearest_unorm_clamp_to_border(const float s
[4], unsigned size
,
466 for (ch
= 0; ch
< 4; ch
++) {
467 icoord
[ch
]= util_ifloor( CLAMP(s
[ch
], 0.5F
, (float) size
- 0.5F
) );
473 * For RECT textures / unnormalized texcoords.
474 * Only a subset of wrap modes supported.
477 wrap_linear_unorm_clamp(const float s
[4], unsigned size
,
478 int icoord0
[4], int icoord1
[4], float w
[4])
481 for (ch
= 0; ch
< 4; ch
++) {
482 /* Not exactly what the spec says, but it matches NVIDIA output */
483 float u
= CLAMP(s
[ch
] - 0.5F
, 0.0f
, (float) size
- 1.0f
);
484 icoord0
[ch
] = util_ifloor(u
);
485 icoord1
[ch
] = icoord0
[ch
] + 1;
492 wrap_linear_unorm_clamp_to_border(const float s
[4], unsigned size
,
493 int icoord0
[4], int icoord1
[4], float w
[4])
496 for (ch
= 0; ch
< 4; ch
++) {
497 float u
= CLAMP(s
[ch
], 0.5F
, (float) size
- 0.5F
);
499 icoord0
[ch
] = util_ifloor(u
);
500 icoord1
[ch
] = icoord0
[ch
] + 1;
501 if (icoord1
[ch
] > (int) size
- 1)
502 icoord1
[ch
] = size
- 1;
510 * Examine the quad's texture coordinates to compute the partial
511 * derivatives w.r.t X and Y, then compute lambda (level of detail).
514 compute_lambda_1d(const struct sp_sampler_varient
*samp
,
515 const float s
[QUAD_SIZE
],
516 const float t
[QUAD_SIZE
],
517 const float p
[QUAD_SIZE
])
519 const struct pipe_texture
*texture
= samp
->texture
;
520 const struct pipe_sampler_state
*sampler
= samp
->sampler
;
521 float dsdx
= fabsf(s
[QUAD_BOTTOM_RIGHT
] - s
[QUAD_BOTTOM_LEFT
]);
522 float dsdy
= fabsf(s
[QUAD_TOP_LEFT
] - s
[QUAD_BOTTOM_LEFT
]);
523 float rho
= MAX2(dsdx
, dsdy
) * texture
->width0
;
525 return util_fast_log2(rho
);
530 compute_lambda_2d(const struct sp_sampler_varient
*samp
,
531 const float s
[QUAD_SIZE
],
532 const float t
[QUAD_SIZE
],
533 const float p
[QUAD_SIZE
])
535 const struct pipe_texture
*texture
= samp
->texture
;
536 const struct pipe_sampler_state
*sampler
= samp
->sampler
;
537 float dsdx
= fabsf(s
[QUAD_BOTTOM_RIGHT
] - s
[QUAD_BOTTOM_LEFT
]);
538 float dsdy
= fabsf(s
[QUAD_TOP_LEFT
] - s
[QUAD_BOTTOM_LEFT
]);
539 float dtdx
= fabsf(t
[QUAD_BOTTOM_RIGHT
] - t
[QUAD_BOTTOM_LEFT
]);
540 float dtdy
= fabsf(t
[QUAD_TOP_LEFT
] - t
[QUAD_BOTTOM_LEFT
]);
541 float maxx
= MAX2(dsdx
, dsdy
) * texture
->width0
;
542 float maxy
= MAX2(dtdx
, dtdy
) * texture
->height0
;
543 float rho
= MAX2(maxx
, maxy
);
545 return util_fast_log2(rho
);
550 compute_lambda_3d(const struct sp_sampler_varient
*samp
,
551 const float s
[QUAD_SIZE
],
552 const float t
[QUAD_SIZE
],
553 const float p
[QUAD_SIZE
])
555 const struct pipe_texture
*texture
= samp
->texture
;
556 const struct pipe_sampler_state
*sampler
= samp
->sampler
;
557 float dsdx
= fabsf(s
[QUAD_BOTTOM_RIGHT
] - s
[QUAD_BOTTOM_LEFT
]);
558 float dsdy
= fabsf(s
[QUAD_TOP_LEFT
] - s
[QUAD_BOTTOM_LEFT
]);
559 float dtdx
= fabsf(t
[QUAD_BOTTOM_RIGHT
] - t
[QUAD_BOTTOM_LEFT
]);
560 float dtdy
= fabsf(t
[QUAD_TOP_LEFT
] - t
[QUAD_BOTTOM_LEFT
]);
561 float dpdx
= fabsf(p
[QUAD_BOTTOM_RIGHT
] - p
[QUAD_BOTTOM_LEFT
]);
562 float dpdy
= fabsf(p
[QUAD_TOP_LEFT
] - p
[QUAD_BOTTOM_LEFT
]);
563 float maxx
= MAX2(dsdx
, dsdy
) * texture
->width0
;
564 float maxy
= MAX2(dtdx
, dtdy
) * texture
->height0
;
565 float maxz
= MAX2(dpdx
, dpdy
) * texture
->depth0
;
568 rho
= MAX2(maxx
, maxy
);
569 rho
= MAX2(rho
, maxz
);
571 return util_fast_log2(rho
);
576 * Compute lambda for a vertex texture sampler.
577 * Since there aren't derivatives to use, just return 0.
580 compute_lambda_vert(const struct sp_sampler_varient
*samp
,
581 const float s
[QUAD_SIZE
],
582 const float t
[QUAD_SIZE
],
583 const float p
[QUAD_SIZE
])
591 * Get a texel from a texture, using the texture tile cache.
593 * \param addr the template tex address containing cube, z, face info.
594 * \param x the x coord of texel within 2D image
595 * \param y the y coord of texel within 2D image
596 * \param rgba the quad to put the texel/color into
598 * XXX maybe move this into sp_tex_tile_cache.c and merge with the
599 * sp_get_cached_tile_tex() function. Also, get 4 texels instead of 1...
605 static INLINE
const float *
606 get_texel_2d_no_border(const struct sp_sampler_varient
*samp
,
607 union tex_tile_address addr
, int x
, int y
)
609 const struct softpipe_tex_cached_tile
*tile
;
611 addr
.bits
.x
= x
/ TILE_SIZE
;
612 addr
.bits
.y
= y
/ TILE_SIZE
;
616 tile
= sp_get_cached_tile_tex(samp
->cache
, addr
);
618 return &tile
->data
.color
[y
][x
][0];
622 static INLINE
const float *
623 get_texel_2d(const struct sp_sampler_varient
*samp
,
624 union tex_tile_address addr
, int x
, int y
)
626 const struct pipe_texture
*texture
= samp
->texture
;
627 unsigned level
= addr
.bits
.level
;
629 if (x
< 0 || x
>= (int) u_minify(texture
->width0
, level
) ||
630 y
< 0 || y
>= (int) u_minify(texture
->height0
, level
)) {
631 return samp
->sampler
->border_color
;
634 return get_texel_2d_no_border( samp
, addr
, x
, y
);
639 /* Gather a quad of adjacent texels within a tile:
642 get_texel_quad_2d_no_border_single_tile(const struct sp_sampler_varient
*samp
,
643 union tex_tile_address addr
,
644 unsigned x
, unsigned y
,
647 const struct softpipe_tex_cached_tile
*tile
;
649 addr
.bits
.x
= x
/ TILE_SIZE
;
650 addr
.bits
.y
= y
/ TILE_SIZE
;
654 tile
= sp_get_cached_tile_tex(samp
->cache
, addr
);
656 out
[0] = &tile
->data
.color
[y
][x
][0];
657 out
[1] = &tile
->data
.color
[y
][x
+1][0];
658 out
[2] = &tile
->data
.color
[y
+1][x
][0];
659 out
[3] = &tile
->data
.color
[y
+1][x
+1][0];
663 /* Gather a quad of potentially non-adjacent texels:
666 get_texel_quad_2d_no_border(const struct sp_sampler_varient
*samp
,
667 union tex_tile_address addr
,
672 out
[0] = get_texel_2d_no_border( samp
, addr
, x0
, y0
);
673 out
[1] = get_texel_2d_no_border( samp
, addr
, x1
, y0
);
674 out
[2] = get_texel_2d_no_border( samp
, addr
, x0
, y1
);
675 out
[3] = get_texel_2d_no_border( samp
, addr
, x1
, y1
);
678 /* Can involve a lot of unnecessary checks for border color:
681 get_texel_quad_2d(const struct sp_sampler_varient
*samp
,
682 union tex_tile_address addr
,
687 out
[0] = get_texel_2d( samp
, addr
, x0
, y0
);
688 out
[1] = get_texel_2d( samp
, addr
, x1
, y0
);
689 out
[3] = get_texel_2d( samp
, addr
, x1
, y1
);
690 out
[2] = get_texel_2d( samp
, addr
, x0
, y1
);
697 static INLINE
const float *
698 get_texel_3d_no_border(const struct sp_sampler_varient
*samp
,
699 union tex_tile_address addr
, int x
, int y
, int z
)
701 const struct softpipe_tex_cached_tile
*tile
;
703 addr
.bits
.x
= x
/ TILE_SIZE
;
704 addr
.bits
.y
= y
/ TILE_SIZE
;
709 tile
= sp_get_cached_tile_tex(samp
->cache
, addr
);
711 return &tile
->data
.color
[y
][x
][0];
715 static INLINE
const float *
716 get_texel_3d(const struct sp_sampler_varient
*samp
,
717 union tex_tile_address addr
, int x
, int y
, int z
)
719 const struct pipe_texture
*texture
= samp
->texture
;
720 unsigned level
= addr
.bits
.level
;
722 if (x
< 0 || x
>= (int) u_minify(texture
->width0
, level
) ||
723 y
< 0 || y
>= (int) u_minify(texture
->height0
, level
) ||
724 z
< 0 || z
>= (int) u_minify(texture
->depth0
, level
)) {
725 return samp
->sampler
->border_color
;
728 return get_texel_3d_no_border( samp
, addr
, x
, y
, z
);
734 * Given the logbase2 of a mipmap's base level size and a mipmap level,
735 * return the size (in texels) of that mipmap level.
736 * For example, if level[0].width = 256 then base_pot will be 8.
737 * If level = 2, then we'll return 64 (the width at level=2).
738 * Return 1 if level > base_pot.
740 static INLINE
unsigned
741 pot_level_size(unsigned base_pot
, unsigned level
)
743 return (base_pot
>= level
) ? (1 << (base_pot
- level
)) : 1;
747 /* Some image-filter fastpaths:
750 img_filter_2d_linear_repeat_POT(struct tgsi_sampler
*tgsi_sampler
,
751 const float s
[QUAD_SIZE
],
752 const float t
[QUAD_SIZE
],
753 const float p
[QUAD_SIZE
],
754 const float c0
[QUAD_SIZE
],
755 enum tgsi_sampler_control control
,
756 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
758 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
760 unsigned level
= samp
->level
;
761 unsigned xpot
= pot_level_size(samp
->xpot
, level
);
762 unsigned ypot
= pot_level_size(samp
->ypot
, level
);
763 unsigned xmax
= (xpot
- 1) & (TILE_SIZE
- 1); /* MIN2(TILE_SIZE, xpot) - 1; */
764 unsigned ymax
= (ypot
- 1) & (TILE_SIZE
- 1); /* MIN2(TILE_SIZE, ypot) - 1; */
765 union tex_tile_address addr
;
768 addr
.bits
.level
= samp
->level
;
770 for (j
= 0; j
< QUAD_SIZE
; j
++) {
773 float u
= s
[j
] * xpot
- 0.5F
;
774 float v
= t
[j
] * ypot
- 0.5F
;
776 int uflr
= util_ifloor(u
);
777 int vflr
= util_ifloor(v
);
779 float xw
= u
- (float)uflr
;
780 float yw
= v
- (float)vflr
;
782 int x0
= uflr
& (xpot
- 1);
783 int y0
= vflr
& (ypot
- 1);
787 /* Can we fetch all four at once:
789 if (x0
< xmax
&& y0
< ymax
) {
790 get_texel_quad_2d_no_border_single_tile(samp
, addr
, x0
, y0
, tx
);
793 unsigned x1
= (x0
+ 1) & (xpot
- 1);
794 unsigned y1
= (y0
+ 1) & (ypot
- 1);
795 get_texel_quad_2d_no_border(samp
, addr
, x0
, y0
, x1
, y1
, tx
);
798 /* interpolate R, G, B, A */
799 for (c
= 0; c
< 4; c
++) {
800 rgba
[c
][j
] = lerp_2d(xw
, yw
,
809 img_filter_2d_nearest_repeat_POT(struct tgsi_sampler
*tgsi_sampler
,
810 const float s
[QUAD_SIZE
],
811 const float t
[QUAD_SIZE
],
812 const float p
[QUAD_SIZE
],
813 const float c0
[QUAD_SIZE
],
814 enum tgsi_sampler_control control
,
815 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
817 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
819 unsigned level
= samp
->level
;
820 unsigned xpot
= pot_level_size(samp
->xpot
, level
);
821 unsigned ypot
= pot_level_size(samp
->ypot
, level
);
822 union tex_tile_address addr
;
825 addr
.bits
.level
= samp
->level
;
827 for (j
= 0; j
< QUAD_SIZE
; j
++) {
830 float u
= s
[j
] * xpot
;
831 float v
= t
[j
] * ypot
;
833 int uflr
= util_ifloor(u
);
834 int vflr
= util_ifloor(v
);
836 int x0
= uflr
& (xpot
- 1);
837 int y0
= vflr
& (ypot
- 1);
839 const float *out
= get_texel_2d_no_border(samp
, addr
, x0
, y0
);
841 for (c
= 0; c
< 4; c
++) {
849 img_filter_2d_nearest_clamp_POT(struct tgsi_sampler
*tgsi_sampler
,
850 const float s
[QUAD_SIZE
],
851 const float t
[QUAD_SIZE
],
852 const float p
[QUAD_SIZE
],
853 const float c0
[QUAD_SIZE
],
854 enum tgsi_sampler_control control
,
855 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
857 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
859 unsigned level
= samp
->level
;
860 unsigned xpot
= pot_level_size(samp
->xpot
, level
);
861 unsigned ypot
= pot_level_size(samp
->ypot
, level
);
862 union tex_tile_address addr
;
865 addr
.bits
.level
= samp
->level
;
867 for (j
= 0; j
< QUAD_SIZE
; j
++) {
870 float u
= s
[j
] * xpot
;
871 float v
= t
[j
] * ypot
;
879 else if (x0
> xpot
- 1)
885 else if (y0
> ypot
- 1)
888 out
= get_texel_2d_no_border(samp
, addr
, x0
, y0
);
890 for (c
= 0; c
< 4; c
++) {
898 img_filter_1d_nearest(struct tgsi_sampler
*tgsi_sampler
,
899 const float s
[QUAD_SIZE
],
900 const float t
[QUAD_SIZE
],
901 const float p
[QUAD_SIZE
],
902 const float c0
[QUAD_SIZE
],
903 enum tgsi_sampler_control control
,
904 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
906 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
907 const struct pipe_texture
*texture
= samp
->texture
;
911 union tex_tile_address addr
;
913 level0
= samp
->level
;
914 width
= u_minify(texture
->width0
, level0
);
919 addr
.bits
.level
= samp
->level
;
921 samp
->nearest_texcoord_s(s
, width
, x
);
923 for (j
= 0; j
< QUAD_SIZE
; j
++) {
924 const float *out
= get_texel_2d(samp
, addr
, x
[j
], 0);
926 for (c
= 0; c
< 4; c
++) {
934 img_filter_2d_nearest(struct tgsi_sampler
*tgsi_sampler
,
935 const float s
[QUAD_SIZE
],
936 const float t
[QUAD_SIZE
],
937 const float p
[QUAD_SIZE
],
938 const float c0
[QUAD_SIZE
],
939 enum tgsi_sampler_control control
,
940 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
942 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
943 const struct pipe_texture
*texture
= samp
->texture
;
947 union tex_tile_address addr
;
950 level0
= samp
->level
;
951 width
= u_minify(texture
->width0
, level0
);
952 height
= u_minify(texture
->height0
, level0
);
958 addr
.bits
.level
= samp
->level
;
960 samp
->nearest_texcoord_s(s
, width
, x
);
961 samp
->nearest_texcoord_t(t
, height
, y
);
963 for (j
= 0; j
< QUAD_SIZE
; j
++) {
964 const float *out
= get_texel_2d(samp
, addr
, x
[j
], y
[j
]);
966 for (c
= 0; c
< 4; c
++) {
973 static INLINE
union tex_tile_address
974 face(union tex_tile_address addr
, unsigned face
)
976 addr
.bits
.face
= face
;
982 img_filter_cube_nearest(struct tgsi_sampler
*tgsi_sampler
,
983 const float s
[QUAD_SIZE
],
984 const float t
[QUAD_SIZE
],
985 const float p
[QUAD_SIZE
],
986 const float c0
[QUAD_SIZE
],
987 enum tgsi_sampler_control control
,
988 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
990 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
991 const struct pipe_texture
*texture
= samp
->texture
;
992 const unsigned *faces
= samp
->faces
; /* zero when not cube-mapping */
996 union tex_tile_address addr
;
998 level0
= samp
->level
;
999 width
= u_minify(texture
->width0
, level0
);
1000 height
= u_minify(texture
->height0
, level0
);
1006 addr
.bits
.level
= samp
->level
;
1008 samp
->nearest_texcoord_s(s
, width
, x
);
1009 samp
->nearest_texcoord_t(t
, height
, y
);
1011 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1012 const float *out
= get_texel_2d(samp
, face(addr
, faces
[j
]), x
[j
], y
[j
]);
1014 for (c
= 0; c
< 4; c
++) {
1015 rgba
[c
][j
] = out
[c
];
1022 img_filter_3d_nearest(struct tgsi_sampler
*tgsi_sampler
,
1023 const float s
[QUAD_SIZE
],
1024 const float t
[QUAD_SIZE
],
1025 const float p
[QUAD_SIZE
],
1026 const float c0
[QUAD_SIZE
],
1027 enum tgsi_sampler_control control
,
1028 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1030 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1031 const struct pipe_texture
*texture
= samp
->texture
;
1033 int width
, height
, depth
;
1034 int x
[4], y
[4], z
[4];
1035 union tex_tile_address addr
;
1037 level0
= samp
->level
;
1038 width
= u_minify(texture
->width0
, level0
);
1039 height
= u_minify(texture
->height0
, level0
);
1040 depth
= u_minify(texture
->depth0
, level0
);
1046 samp
->nearest_texcoord_s(s
, width
, x
);
1047 samp
->nearest_texcoord_t(t
, height
, y
);
1048 samp
->nearest_texcoord_p(p
, depth
, z
);
1051 addr
.bits
.level
= samp
->level
;
1053 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1054 const float *out
= get_texel_3d(samp
, addr
, x
[j
], y
[j
], z
[j
]);
1056 for (c
= 0; c
< 4; c
++) {
1057 rgba
[c
][j
] = out
[c
];
1064 img_filter_1d_linear(struct tgsi_sampler
*tgsi_sampler
,
1065 const float s
[QUAD_SIZE
],
1066 const float t
[QUAD_SIZE
],
1067 const float p
[QUAD_SIZE
],
1068 const float c0
[QUAD_SIZE
],
1069 enum tgsi_sampler_control control
,
1070 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1072 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1073 const struct pipe_texture
*texture
= samp
->texture
;
1077 float xw
[4]; /* weights */
1078 union tex_tile_address addr
;
1080 level0
= samp
->level
;
1081 width
= u_minify(texture
->width0
, level0
);
1086 addr
.bits
.level
= samp
->level
;
1088 samp
->linear_texcoord_s(s
, width
, x0
, x1
, xw
);
1090 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1091 const float *tx0
= get_texel_2d(samp
, addr
, x0
[j
], 0);
1092 const float *tx1
= get_texel_2d(samp
, addr
, x1
[j
], 0);
1095 /* interpolate R, G, B, A */
1096 for (c
= 0; c
< 4; c
++) {
1097 rgba
[c
][j
] = lerp(xw
[j
], tx0
[c
], tx1
[c
]);
1104 img_filter_2d_linear(struct tgsi_sampler
*tgsi_sampler
,
1105 const float s
[QUAD_SIZE
],
1106 const float t
[QUAD_SIZE
],
1107 const float p
[QUAD_SIZE
],
1108 const float c0
[QUAD_SIZE
],
1109 enum tgsi_sampler_control control
,
1110 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1112 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1113 const struct pipe_texture
*texture
= samp
->texture
;
1116 int x0
[4], y0
[4], x1
[4], y1
[4];
1117 float xw
[4], yw
[4]; /* weights */
1118 union tex_tile_address addr
;
1120 level0
= samp
->level
;
1121 width
= u_minify(texture
->width0
, level0
);
1122 height
= u_minify(texture
->height0
, level0
);
1128 addr
.bits
.level
= samp
->level
;
1130 samp
->linear_texcoord_s(s
, width
, x0
, x1
, xw
);
1131 samp
->linear_texcoord_t(t
, height
, y0
, y1
, yw
);
1133 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1134 const float *tx0
= get_texel_2d(samp
, addr
, x0
[j
], y0
[j
]);
1135 const float *tx1
= get_texel_2d(samp
, addr
, x1
[j
], y0
[j
]);
1136 const float *tx2
= get_texel_2d(samp
, addr
, x0
[j
], y1
[j
]);
1137 const float *tx3
= get_texel_2d(samp
, addr
, x1
[j
], y1
[j
]);
1140 /* interpolate R, G, B, A */
1141 for (c
= 0; c
< 4; c
++) {
1142 rgba
[c
][j
] = lerp_2d(xw
[j
], yw
[j
],
1151 img_filter_cube_linear(struct tgsi_sampler
*tgsi_sampler
,
1152 const float s
[QUAD_SIZE
],
1153 const float t
[QUAD_SIZE
],
1154 const float p
[QUAD_SIZE
],
1155 const float c0
[QUAD_SIZE
],
1156 enum tgsi_sampler_control control
,
1157 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1159 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1160 const struct pipe_texture
*texture
= samp
->texture
;
1161 const unsigned *faces
= samp
->faces
; /* zero when not cube-mapping */
1164 int x0
[4], y0
[4], x1
[4], y1
[4];
1165 float xw
[4], yw
[4]; /* weights */
1166 union tex_tile_address addr
;
1168 level0
= samp
->level
;
1169 width
= u_minify(texture
->width0
, level0
);
1170 height
= u_minify(texture
->height0
, level0
);
1176 addr
.bits
.level
= samp
->level
;
1178 samp
->linear_texcoord_s(s
, width
, x0
, x1
, xw
);
1179 samp
->linear_texcoord_t(t
, height
, y0
, y1
, yw
);
1181 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1182 union tex_tile_address addrj
= face(addr
, faces
[j
]);
1183 const float *tx0
= get_texel_2d(samp
, addrj
, x0
[j
], y0
[j
]);
1184 const float *tx1
= get_texel_2d(samp
, addrj
, x1
[j
], y0
[j
]);
1185 const float *tx2
= get_texel_2d(samp
, addrj
, x0
[j
], y1
[j
]);
1186 const float *tx3
= get_texel_2d(samp
, addrj
, x1
[j
], y1
[j
]);
1189 /* interpolate R, G, B, A */
1190 for (c
= 0; c
< 4; c
++) {
1191 rgba
[c
][j
] = lerp_2d(xw
[j
], yw
[j
],
1200 img_filter_3d_linear(struct tgsi_sampler
*tgsi_sampler
,
1201 const float s
[QUAD_SIZE
],
1202 const float t
[QUAD_SIZE
],
1203 const float p
[QUAD_SIZE
],
1204 const float c0
[QUAD_SIZE
],
1205 enum tgsi_sampler_control control
,
1206 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1208 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1209 const struct pipe_texture
*texture
= samp
->texture
;
1211 int width
, height
, depth
;
1212 int x0
[4], x1
[4], y0
[4], y1
[4], z0
[4], z1
[4];
1213 float xw
[4], yw
[4], zw
[4]; /* interpolation weights */
1214 union tex_tile_address addr
;
1216 level0
= samp
->level
;
1217 width
= u_minify(texture
->width0
, level0
);
1218 height
= u_minify(texture
->height0
, level0
);
1219 depth
= u_minify(texture
->depth0
, level0
);
1222 addr
.bits
.level
= level0
;
1228 samp
->linear_texcoord_s(s
, width
, x0
, x1
, xw
);
1229 samp
->linear_texcoord_t(t
, height
, y0
, y1
, yw
);
1230 samp
->linear_texcoord_p(p
, depth
, z0
, z1
, zw
);
1232 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1235 const float *tx00
= get_texel_3d(samp
, addr
, x0
[j
], y0
[j
], z0
[j
]);
1236 const float *tx01
= get_texel_3d(samp
, addr
, x1
[j
], y0
[j
], z0
[j
]);
1237 const float *tx02
= get_texel_3d(samp
, addr
, x0
[j
], y1
[j
], z0
[j
]);
1238 const float *tx03
= get_texel_3d(samp
, addr
, x1
[j
], y1
[j
], z0
[j
]);
1240 const float *tx10
= get_texel_3d(samp
, addr
, x0
[j
], y0
[j
], z1
[j
]);
1241 const float *tx11
= get_texel_3d(samp
, addr
, x1
[j
], y0
[j
], z1
[j
]);
1242 const float *tx12
= get_texel_3d(samp
, addr
, x0
[j
], y1
[j
], z1
[j
]);
1243 const float *tx13
= get_texel_3d(samp
, addr
, x1
[j
], y1
[j
], z1
[j
]);
1245 /* interpolate R, G, B, A */
1246 for (c
= 0; c
< 4; c
++) {
1247 rgba
[c
][j
] = lerp_3d(xw
[j
], yw
[j
], zw
[j
],
1257 /* Calculate level of detail for every fragment.
1258 * Note that lambda has already been biased by global LOD bias.
1261 compute_lod(const struct pipe_sampler_state
*sampler
,
1262 const float biased_lambda
,
1263 const float lodbias
[QUAD_SIZE
],
1264 float lod
[QUAD_SIZE
])
1268 for (i
= 0; i
< QUAD_SIZE
; i
++) {
1269 lod
[i
] = biased_lambda
+ lodbias
[i
];
1270 lod
[i
] = CLAMP(lod
[i
], sampler
->min_lod
, sampler
->max_lod
);
1276 mip_filter_linear(struct tgsi_sampler
*tgsi_sampler
,
1277 const float s
[QUAD_SIZE
],
1278 const float t
[QUAD_SIZE
],
1279 const float p
[QUAD_SIZE
],
1280 const float c0
[QUAD_SIZE
],
1281 enum tgsi_sampler_control control
,
1282 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1284 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1285 const struct pipe_texture
*texture
= samp
->texture
;
1288 float lod
[QUAD_SIZE
];
1290 if (control
== tgsi_sampler_lod_bias
) {
1291 lambda
= samp
->compute_lambda(samp
, s
, t
, p
) + samp
->sampler
->lod_bias
;
1292 compute_lod(samp
->sampler
, lambda
, c0
, lod
);
1294 assert(control
== tgsi_sampler_lod_explicit
);
1296 memcpy(lod
, c0
, sizeof(lod
));
1299 /* XXX: Take into account all lod values.
1302 level0
= (int)lambda
;
1306 samp
->mag_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1308 else if (level0
>= texture
->last_level
) {
1309 samp
->level
= texture
->last_level
;
1310 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1313 float levelBlend
= lambda
- level0
;
1318 samp
->level
= level0
;
1319 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba0
);
1321 samp
->level
= level0
+1;
1322 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba1
);
1324 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1325 for (c
= 0; c
< 4; c
++) {
1326 rgba
[c
][j
] = lerp(levelBlend
, rgba0
[c
][j
], rgba1
[c
][j
]);
1334 mip_filter_nearest(struct tgsi_sampler
*tgsi_sampler
,
1335 const float s
[QUAD_SIZE
],
1336 const float t
[QUAD_SIZE
],
1337 const float p
[QUAD_SIZE
],
1338 const float c0
[QUAD_SIZE
],
1339 enum tgsi_sampler_control control
,
1340 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1342 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1343 const struct pipe_texture
*texture
= samp
->texture
;
1345 float lod
[QUAD_SIZE
];
1347 if (control
== tgsi_sampler_lod_bias
) {
1348 lambda
= samp
->compute_lambda(samp
, s
, t
, p
) + samp
->sampler
->lod_bias
;
1349 compute_lod(samp
->sampler
, lambda
, c0
, lod
);
1351 assert(control
== tgsi_sampler_lod_explicit
);
1353 memcpy(lod
, c0
, sizeof(lod
));
1356 /* XXX: Take into account all lod values.
1362 samp
->mag_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1365 samp
->level
= (int)(lambda
+ 0.5) ;
1366 samp
->level
= MIN2(samp
->level
, (int)texture
->last_level
);
1367 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1371 printf("RGBA %g %g %g %g, %g %g %g %g, %g %g %g %g, %g %g %g %g\n",
1372 rgba
[0][0], rgba
[1][0], rgba
[2][0], rgba
[3][0],
1373 rgba
[0][1], rgba
[1][1], rgba
[2][1], rgba
[3][1],
1374 rgba
[0][2], rgba
[1][2], rgba
[2][2], rgba
[3][2],
1375 rgba
[0][3], rgba
[1][3], rgba
[2][3], rgba
[3][3]);
1381 mip_filter_none(struct tgsi_sampler
*tgsi_sampler
,
1382 const float s
[QUAD_SIZE
],
1383 const float t
[QUAD_SIZE
],
1384 const float p
[QUAD_SIZE
],
1385 const float c0
[QUAD_SIZE
],
1386 enum tgsi_sampler_control control
,
1387 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1389 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1391 float lod
[QUAD_SIZE
];
1393 if (control
== tgsi_sampler_lod_bias
) {
1394 lambda
= samp
->compute_lambda(samp
, s
, t
, p
) + samp
->sampler
->lod_bias
;
1395 compute_lod(samp
->sampler
, lambda
, c0
, lod
);
1397 assert(control
== tgsi_sampler_lod_explicit
);
1399 memcpy(lod
, c0
, sizeof(lod
));
1402 /* XXX: Take into account all lod values.
1407 samp
->mag_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1410 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1417 * Specialized version of mip_filter_linear with hard-wired calls to
1418 * 2d lambda calculation and 2d_linear_repeat_POT img filters.
1421 mip_filter_linear_2d_linear_repeat_POT(
1422 struct tgsi_sampler
*tgsi_sampler
,
1423 const float s
[QUAD_SIZE
],
1424 const float t
[QUAD_SIZE
],
1425 const float p
[QUAD_SIZE
],
1426 const float c0
[QUAD_SIZE
],
1427 enum tgsi_sampler_control control
,
1428 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1430 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1431 const struct pipe_texture
*texture
= samp
->texture
;
1434 float lod
[QUAD_SIZE
];
1436 if (control
== tgsi_sampler_lod_bias
) {
1437 lambda
= samp
->compute_lambda(samp
, s
, t
, p
) + samp
->sampler
->lod_bias
;
1438 compute_lod(samp
->sampler
, lambda
, c0
, lod
);
1440 assert(control
== tgsi_sampler_lod_explicit
);
1442 memcpy(lod
, c0
, sizeof(lod
));
1445 /* XXX: Take into account all lod values.
1448 level0
= (int)lambda
;
1450 /* Catches both negative and large values of level0:
1452 if ((unsigned)level0
>= texture
->last_level
) {
1456 samp
->level
= texture
->last_level
;
1458 img_filter_2d_linear_repeat_POT(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1461 float levelBlend
= lambda
- level0
;
1466 samp
->level
= level0
;
1467 img_filter_2d_linear_repeat_POT(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba0
);
1469 samp
->level
= level0
+1;
1470 img_filter_2d_linear_repeat_POT(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba1
);
1472 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1473 for (c
= 0; c
< 4; c
++) {
1474 rgba
[c
][j
] = lerp(levelBlend
, rgba0
[c
][j
], rgba1
[c
][j
]);
1483 * Do shadow/depth comparisons.
1486 sample_compare(struct tgsi_sampler
*tgsi_sampler
,
1487 const float s
[QUAD_SIZE
],
1488 const float t
[QUAD_SIZE
],
1489 const float p
[QUAD_SIZE
],
1490 const float c0
[QUAD_SIZE
],
1491 enum tgsi_sampler_control control
,
1492 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1494 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1495 const struct pipe_sampler_state
*sampler
= samp
->sampler
;
1496 int j
, k0
, k1
, k2
, k3
;
1499 samp
->mip_filter(tgsi_sampler
, s
, t
, p
, c0
, control
, rgba
);
1502 * Compare texcoord 'p' (aka R) against texture value 'rgba[0]'
1503 * When we sampled the depth texture, the depth value was put into all
1504 * RGBA channels. We look at the red channel here.
1507 /* compare four texcoords vs. four texture samples */
1508 switch (sampler
->compare_func
) {
1509 case PIPE_FUNC_LESS
:
1510 k0
= p
[0] < rgba
[0][0];
1511 k1
= p
[1] < rgba
[0][1];
1512 k2
= p
[2] < rgba
[0][2];
1513 k3
= p
[3] < rgba
[0][3];
1515 case PIPE_FUNC_LEQUAL
:
1516 k0
= p
[0] <= rgba
[0][0];
1517 k1
= p
[1] <= rgba
[0][1];
1518 k2
= p
[2] <= rgba
[0][2];
1519 k3
= p
[3] <= rgba
[0][3];
1521 case PIPE_FUNC_GREATER
:
1522 k0
= p
[0] > rgba
[0][0];
1523 k1
= p
[1] > rgba
[0][1];
1524 k2
= p
[2] > rgba
[0][2];
1525 k3
= p
[3] > rgba
[0][3];
1527 case PIPE_FUNC_GEQUAL
:
1528 k0
= p
[0] >= rgba
[0][0];
1529 k1
= p
[1] >= rgba
[0][1];
1530 k2
= p
[2] >= rgba
[0][2];
1531 k3
= p
[3] >= rgba
[0][3];
1533 case PIPE_FUNC_EQUAL
:
1534 k0
= p
[0] == rgba
[0][0];
1535 k1
= p
[1] == rgba
[0][1];
1536 k2
= p
[2] == rgba
[0][2];
1537 k3
= p
[3] == rgba
[0][3];
1539 case PIPE_FUNC_NOTEQUAL
:
1540 k0
= p
[0] != rgba
[0][0];
1541 k1
= p
[1] != rgba
[0][1];
1542 k2
= p
[2] != rgba
[0][2];
1543 k3
= p
[3] != rgba
[0][3];
1545 case PIPE_FUNC_ALWAYS
:
1546 k0
= k1
= k2
= k3
= 1;
1548 case PIPE_FUNC_NEVER
:
1549 k0
= k1
= k2
= k3
= 0;
1552 k0
= k1
= k2
= k3
= 0;
1557 /* convert four pass/fail values to an intensity in [0,1] */
1558 val
= 0.25F
* (k0
+ k1
+ k2
+ k3
);
1560 /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */
1561 for (j
= 0; j
< 4; j
++) {
1562 rgba
[0][j
] = rgba
[1][j
] = rgba
[2][j
] = val
;
1569 * Compute which cube face is referenced by each texcoord and put that
1570 * info into the sampler faces[] array. Then sample the cube faces
1573 sample_cube(struct tgsi_sampler
*tgsi_sampler
,
1574 const float s
[QUAD_SIZE
],
1575 const float t
[QUAD_SIZE
],
1576 const float p
[QUAD_SIZE
],
1577 const float c0
[QUAD_SIZE
],
1578 enum tgsi_sampler_control control
,
1579 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1581 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1583 float ssss
[4], tttt
[4];
1587 direction target sc tc ma
1588 ---------- ------------------------------- --- --- ---
1589 +rx TEXTURE_CUBE_MAP_POSITIVE_X_EXT -rz -ry rx
1590 -rx TEXTURE_CUBE_MAP_NEGATIVE_X_EXT +rz -ry rx
1591 +ry TEXTURE_CUBE_MAP_POSITIVE_Y_EXT +rx +rz ry
1592 -ry TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT +rx -rz ry
1593 +rz TEXTURE_CUBE_MAP_POSITIVE_Z_EXT +rx -ry rz
1594 -rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz
1596 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1600 const float arx
= fabsf(rx
), ary
= fabsf(ry
), arz
= fabsf(rz
);
1604 if (arx
>= ary
&& arx
>= arz
) {
1606 face
= PIPE_TEX_FACE_POS_X
;
1612 face
= PIPE_TEX_FACE_NEG_X
;
1618 else if (ary
>= arx
&& ary
>= arz
) {
1620 face
= PIPE_TEX_FACE_POS_Y
;
1626 face
= PIPE_TEX_FACE_NEG_Y
;
1634 face
= PIPE_TEX_FACE_POS_Z
;
1640 face
= PIPE_TEX_FACE_NEG_Z
;
1648 const float ima
= 1.0 / ma
;
1649 ssss
[j
] = ( sc
* ima
+ 1.0F
) * 0.5F
;
1650 tttt
[j
] = ( tc
* ima
+ 1.0F
) * 0.5F
;
1651 samp
->faces
[j
] = face
;
1655 /* In our little pipeline, the compare stage is next. If compare
1656 * is not active, this will point somewhere deeper into the
1657 * pipeline, eg. to mip_filter or even img_filter.
1659 samp
->compare(tgsi_sampler
, ssss
, tttt
, NULL
, c0
, control
, rgba
);
1664 static wrap_nearest_func
1665 get_nearest_unorm_wrap(unsigned mode
)
1668 case PIPE_TEX_WRAP_CLAMP
:
1669 return wrap_nearest_unorm_clamp
;
1670 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
1671 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
1672 return wrap_nearest_unorm_clamp_to_border
;
1675 return wrap_nearest_unorm_clamp
;
1680 static wrap_nearest_func
1681 get_nearest_wrap(unsigned mode
)
1684 case PIPE_TEX_WRAP_REPEAT
:
1685 return wrap_nearest_repeat
;
1686 case PIPE_TEX_WRAP_CLAMP
:
1687 return wrap_nearest_clamp
;
1688 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
1689 return wrap_nearest_clamp_to_edge
;
1690 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
1691 return wrap_nearest_clamp_to_border
;
1692 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
1693 return wrap_nearest_mirror_repeat
;
1694 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
1695 return wrap_nearest_mirror_clamp
;
1696 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
1697 return wrap_nearest_mirror_clamp_to_edge
;
1698 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
1699 return wrap_nearest_mirror_clamp_to_border
;
1702 return wrap_nearest_repeat
;
1707 static wrap_linear_func
1708 get_linear_unorm_wrap(unsigned mode
)
1711 case PIPE_TEX_WRAP_CLAMP
:
1712 return wrap_linear_unorm_clamp
;
1713 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
1714 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
1715 return wrap_linear_unorm_clamp_to_border
;
1718 return wrap_linear_unorm_clamp
;
1723 static wrap_linear_func
1724 get_linear_wrap(unsigned mode
)
1727 case PIPE_TEX_WRAP_REPEAT
:
1728 return wrap_linear_repeat
;
1729 case PIPE_TEX_WRAP_CLAMP
:
1730 return wrap_linear_clamp
;
1731 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
1732 return wrap_linear_clamp_to_edge
;
1733 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
1734 return wrap_linear_clamp_to_border
;
1735 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
1736 return wrap_linear_mirror_repeat
;
1737 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
1738 return wrap_linear_mirror_clamp
;
1739 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
1740 return wrap_linear_mirror_clamp_to_edge
;
1741 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
1742 return wrap_linear_mirror_clamp_to_border
;
1745 return wrap_linear_repeat
;
1750 static compute_lambda_func
1751 get_lambda_func(const union sp_sampler_key key
)
1753 if (key
.bits
.processor
== TGSI_PROCESSOR_VERTEX
)
1754 return compute_lambda_vert
;
1756 switch (key
.bits
.target
) {
1757 case PIPE_TEXTURE_1D
:
1758 return compute_lambda_1d
;
1759 case PIPE_TEXTURE_2D
:
1760 case PIPE_TEXTURE_CUBE
:
1761 return compute_lambda_2d
;
1762 case PIPE_TEXTURE_3D
:
1763 return compute_lambda_3d
;
1766 return compute_lambda_1d
;
1772 get_img_filter(const union sp_sampler_key key
,
1774 const struct pipe_sampler_state
*sampler
)
1776 switch (key
.bits
.target
) {
1777 case PIPE_TEXTURE_1D
:
1778 if (filter
== PIPE_TEX_FILTER_NEAREST
)
1779 return img_filter_1d_nearest
;
1781 return img_filter_1d_linear
;
1783 case PIPE_TEXTURE_2D
:
1784 /* Try for fast path:
1786 if (key
.bits
.is_pot
&&
1787 sampler
->wrap_s
== sampler
->wrap_t
&&
1788 sampler
->normalized_coords
)
1790 switch (sampler
->wrap_s
) {
1791 case PIPE_TEX_WRAP_REPEAT
:
1793 case PIPE_TEX_FILTER_NEAREST
:
1794 return img_filter_2d_nearest_repeat_POT
;
1795 case PIPE_TEX_FILTER_LINEAR
:
1796 return img_filter_2d_linear_repeat_POT
;
1801 case PIPE_TEX_WRAP_CLAMP
:
1803 case PIPE_TEX_FILTER_NEAREST
:
1804 return img_filter_2d_nearest_clamp_POT
;
1810 /* Otherwise use default versions:
1812 if (filter
== PIPE_TEX_FILTER_NEAREST
)
1813 return img_filter_2d_nearest
;
1815 return img_filter_2d_linear
;
1817 case PIPE_TEXTURE_CUBE
:
1818 if (filter
== PIPE_TEX_FILTER_NEAREST
)
1819 return img_filter_cube_nearest
;
1821 return img_filter_cube_linear
;
1823 case PIPE_TEXTURE_3D
:
1824 if (filter
== PIPE_TEX_FILTER_NEAREST
)
1825 return img_filter_3d_nearest
;
1827 return img_filter_3d_linear
;
1831 return img_filter_1d_nearest
;
1837 * Bind the given texture object and texture cache to the sampler varient.
1840 sp_sampler_varient_bind_texture( struct sp_sampler_varient
*samp
,
1841 struct softpipe_tex_tile_cache
*tex_cache
,
1842 const struct pipe_texture
*texture
)
1844 const struct pipe_sampler_state
*sampler
= samp
->sampler
;
1846 samp
->texture
= texture
;
1847 samp
->cache
= tex_cache
;
1848 samp
->xpot
= util_unsigned_logbase2( texture
->width0
);
1849 samp
->ypot
= util_unsigned_logbase2( texture
->height0
);
1850 samp
->level
= CLAMP((int) sampler
->min_lod
, 0, (int) texture
->last_level
);
1855 sp_sampler_varient_destroy( struct sp_sampler_varient
*samp
)
1862 * Create a sampler varient for a given set of non-orthogonal state.
1864 struct sp_sampler_varient
*
1865 sp_create_sampler_varient( const struct pipe_sampler_state
*sampler
,
1866 const union sp_sampler_key key
)
1868 struct sp_sampler_varient
*samp
= CALLOC_STRUCT(sp_sampler_varient
);
1872 samp
->sampler
= sampler
;
1875 /* Note that (for instance) linear_texcoord_s and
1876 * nearest_texcoord_s may be active at the same time, if the
1877 * sampler min_img_filter differs from its mag_img_filter.
1879 if (sampler
->normalized_coords
) {
1880 samp
->linear_texcoord_s
= get_linear_wrap( sampler
->wrap_s
);
1881 samp
->linear_texcoord_t
= get_linear_wrap( sampler
->wrap_t
);
1882 samp
->linear_texcoord_p
= get_linear_wrap( sampler
->wrap_r
);
1884 samp
->nearest_texcoord_s
= get_nearest_wrap( sampler
->wrap_s
);
1885 samp
->nearest_texcoord_t
= get_nearest_wrap( sampler
->wrap_t
);
1886 samp
->nearest_texcoord_p
= get_nearest_wrap( sampler
->wrap_r
);
1889 samp
->linear_texcoord_s
= get_linear_unorm_wrap( sampler
->wrap_s
);
1890 samp
->linear_texcoord_t
= get_linear_unorm_wrap( sampler
->wrap_t
);
1891 samp
->linear_texcoord_p
= get_linear_unorm_wrap( sampler
->wrap_r
);
1893 samp
->nearest_texcoord_s
= get_nearest_unorm_wrap( sampler
->wrap_s
);
1894 samp
->nearest_texcoord_t
= get_nearest_unorm_wrap( sampler
->wrap_t
);
1895 samp
->nearest_texcoord_p
= get_nearest_unorm_wrap( sampler
->wrap_r
);
1898 samp
->compute_lambda
= get_lambda_func( key
);
1900 samp
->min_img_filter
= get_img_filter(key
, sampler
->min_img_filter
, sampler
);
1901 samp
->mag_img_filter
= get_img_filter(key
, sampler
->mag_img_filter
, sampler
);
1903 switch (sampler
->min_mip_filter
) {
1904 case PIPE_TEX_MIPFILTER_NONE
:
1905 if (sampler
->min_img_filter
== sampler
->mag_img_filter
)
1906 samp
->mip_filter
= samp
->min_img_filter
;
1908 samp
->mip_filter
= mip_filter_none
;
1911 case PIPE_TEX_MIPFILTER_NEAREST
:
1912 samp
->mip_filter
= mip_filter_nearest
;
1915 case PIPE_TEX_MIPFILTER_LINEAR
:
1916 if (key
.bits
.is_pot
&&
1917 sampler
->min_img_filter
== sampler
->mag_img_filter
&&
1918 sampler
->normalized_coords
&&
1919 sampler
->wrap_s
== PIPE_TEX_WRAP_REPEAT
&&
1920 sampler
->wrap_t
== PIPE_TEX_WRAP_REPEAT
&&
1921 sampler
->min_img_filter
== PIPE_TEX_FILTER_LINEAR
)
1923 samp
->mip_filter
= mip_filter_linear_2d_linear_repeat_POT
;
1927 samp
->mip_filter
= mip_filter_linear
;
1932 if (sampler
->compare_mode
!= PIPE_TEX_COMPARE_NONE
) {
1933 samp
->compare
= sample_compare
;
1936 /* Skip compare operation by promoting the mip_filter function
1939 samp
->compare
= samp
->mip_filter
;
1942 if (key
.bits
.target
== PIPE_TEXTURE_CUBE
) {
1943 samp
->base
.get_samples
= sample_cube
;
1951 /* Skip cube face determination by promoting the compare
1954 samp
->base
.get_samples
= samp
->compare
;