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 float dsdx
= fabsf(s
[QUAD_BOTTOM_RIGHT
] - s
[QUAD_BOTTOM_LEFT
]);
521 float dsdy
= fabsf(s
[QUAD_TOP_LEFT
] - s
[QUAD_BOTTOM_LEFT
]);
522 float rho
= MAX2(dsdx
, dsdy
) * texture
->width0
;
524 return util_fast_log2(rho
);
529 compute_lambda_2d(const struct sp_sampler_varient
*samp
,
530 const float s
[QUAD_SIZE
],
531 const float t
[QUAD_SIZE
],
532 const float p
[QUAD_SIZE
])
534 const struct pipe_texture
*texture
= samp
->texture
;
535 float dsdx
= fabsf(s
[QUAD_BOTTOM_RIGHT
] - s
[QUAD_BOTTOM_LEFT
]);
536 float dsdy
= fabsf(s
[QUAD_TOP_LEFT
] - s
[QUAD_BOTTOM_LEFT
]);
537 float dtdx
= fabsf(t
[QUAD_BOTTOM_RIGHT
] - t
[QUAD_BOTTOM_LEFT
]);
538 float dtdy
= fabsf(t
[QUAD_TOP_LEFT
] - t
[QUAD_BOTTOM_LEFT
]);
539 float maxx
= MAX2(dsdx
, dsdy
) * texture
->width0
;
540 float maxy
= MAX2(dtdx
, dtdy
) * texture
->height0
;
541 float rho
= MAX2(maxx
, maxy
);
543 return util_fast_log2(rho
);
548 compute_lambda_3d(const struct sp_sampler_varient
*samp
,
549 const float s
[QUAD_SIZE
],
550 const float t
[QUAD_SIZE
],
551 const float p
[QUAD_SIZE
])
553 const struct pipe_texture
*texture
= samp
->texture
;
554 float dsdx
= fabsf(s
[QUAD_BOTTOM_RIGHT
] - s
[QUAD_BOTTOM_LEFT
]);
555 float dsdy
= fabsf(s
[QUAD_TOP_LEFT
] - s
[QUAD_BOTTOM_LEFT
]);
556 float dtdx
= fabsf(t
[QUAD_BOTTOM_RIGHT
] - t
[QUAD_BOTTOM_LEFT
]);
557 float dtdy
= fabsf(t
[QUAD_TOP_LEFT
] - t
[QUAD_BOTTOM_LEFT
]);
558 float dpdx
= fabsf(p
[QUAD_BOTTOM_RIGHT
] - p
[QUAD_BOTTOM_LEFT
]);
559 float dpdy
= fabsf(p
[QUAD_TOP_LEFT
] - p
[QUAD_BOTTOM_LEFT
]);
560 float maxx
= MAX2(dsdx
, dsdy
) * texture
->width0
;
561 float maxy
= MAX2(dtdx
, dtdy
) * texture
->height0
;
562 float maxz
= MAX2(dpdx
, dpdy
) * texture
->depth0
;
565 rho
= MAX2(maxx
, maxy
);
566 rho
= MAX2(rho
, maxz
);
568 return util_fast_log2(rho
);
573 * Compute lambda for a vertex texture sampler.
574 * Since there aren't derivatives to use, just return 0.
577 compute_lambda_vert(const struct sp_sampler_varient
*samp
,
578 const float s
[QUAD_SIZE
],
579 const float t
[QUAD_SIZE
],
580 const float p
[QUAD_SIZE
])
588 * Get a texel from a texture, using the texture tile cache.
590 * \param addr the template tex address containing cube, z, face info.
591 * \param x the x coord of texel within 2D image
592 * \param y the y coord of texel within 2D image
593 * \param rgba the quad to put the texel/color into
595 * XXX maybe move this into sp_tex_tile_cache.c and merge with the
596 * sp_get_cached_tile_tex() function. Also, get 4 texels instead of 1...
602 static INLINE
const float *
603 get_texel_2d_no_border(const struct sp_sampler_varient
*samp
,
604 union tex_tile_address addr
, int x
, int y
)
606 const struct softpipe_tex_cached_tile
*tile
;
608 addr
.bits
.x
= x
/ TILE_SIZE
;
609 addr
.bits
.y
= y
/ TILE_SIZE
;
613 tile
= sp_get_cached_tile_tex(samp
->cache
, addr
);
615 return &tile
->data
.color
[y
][x
][0];
619 static INLINE
const float *
620 get_texel_2d(const struct sp_sampler_varient
*samp
,
621 union tex_tile_address addr
, int x
, int y
)
623 const struct pipe_texture
*texture
= samp
->texture
;
624 unsigned level
= addr
.bits
.level
;
626 if (x
< 0 || x
>= (int) u_minify(texture
->width0
, level
) ||
627 y
< 0 || y
>= (int) u_minify(texture
->height0
, level
)) {
628 return samp
->sampler
->border_color
;
631 return get_texel_2d_no_border( samp
, addr
, x
, y
);
636 /* Gather a quad of adjacent texels within a tile:
639 get_texel_quad_2d_no_border_single_tile(const struct sp_sampler_varient
*samp
,
640 union tex_tile_address addr
,
641 unsigned x
, unsigned y
,
644 const struct softpipe_tex_cached_tile
*tile
;
646 addr
.bits
.x
= x
/ TILE_SIZE
;
647 addr
.bits
.y
= y
/ TILE_SIZE
;
651 tile
= sp_get_cached_tile_tex(samp
->cache
, addr
);
653 out
[0] = &tile
->data
.color
[y
][x
][0];
654 out
[1] = &tile
->data
.color
[y
][x
+1][0];
655 out
[2] = &tile
->data
.color
[y
+1][x
][0];
656 out
[3] = &tile
->data
.color
[y
+1][x
+1][0];
660 /* Gather a quad of potentially non-adjacent texels:
663 get_texel_quad_2d_no_border(const struct sp_sampler_varient
*samp
,
664 union tex_tile_address addr
,
669 out
[0] = get_texel_2d_no_border( samp
, addr
, x0
, y0
);
670 out
[1] = get_texel_2d_no_border( samp
, addr
, x1
, y0
);
671 out
[2] = get_texel_2d_no_border( samp
, addr
, x0
, y1
);
672 out
[3] = get_texel_2d_no_border( samp
, addr
, x1
, y1
);
675 /* Can involve a lot of unnecessary checks for border color:
678 get_texel_quad_2d(const struct sp_sampler_varient
*samp
,
679 union tex_tile_address addr
,
684 out
[0] = get_texel_2d( samp
, addr
, x0
, y0
);
685 out
[1] = get_texel_2d( samp
, addr
, x1
, y0
);
686 out
[3] = get_texel_2d( samp
, addr
, x1
, y1
);
687 out
[2] = get_texel_2d( samp
, addr
, x0
, y1
);
694 static INLINE
const float *
695 get_texel_3d_no_border(const struct sp_sampler_varient
*samp
,
696 union tex_tile_address addr
, int x
, int y
, int z
)
698 const struct softpipe_tex_cached_tile
*tile
;
700 addr
.bits
.x
= x
/ TILE_SIZE
;
701 addr
.bits
.y
= y
/ TILE_SIZE
;
706 tile
= sp_get_cached_tile_tex(samp
->cache
, addr
);
708 return &tile
->data
.color
[y
][x
][0];
712 static INLINE
const float *
713 get_texel_3d(const struct sp_sampler_varient
*samp
,
714 union tex_tile_address addr
, int x
, int y
, int z
)
716 const struct pipe_texture
*texture
= samp
->texture
;
717 unsigned level
= addr
.bits
.level
;
719 if (x
< 0 || x
>= (int) u_minify(texture
->width0
, level
) ||
720 y
< 0 || y
>= (int) u_minify(texture
->height0
, level
) ||
721 z
< 0 || z
>= (int) u_minify(texture
->depth0
, level
)) {
722 return samp
->sampler
->border_color
;
725 return get_texel_3d_no_border( samp
, addr
, x
, y
, z
);
731 * Given the logbase2 of a mipmap's base level size and a mipmap level,
732 * return the size (in texels) of that mipmap level.
733 * For example, if level[0].width = 256 then base_pot will be 8.
734 * If level = 2, then we'll return 64 (the width at level=2).
735 * Return 1 if level > base_pot.
737 static INLINE
unsigned
738 pot_level_size(unsigned base_pot
, unsigned level
)
740 return (base_pot
>= level
) ? (1 << (base_pot
- level
)) : 1;
744 /* Some image-filter fastpaths:
747 img_filter_2d_linear_repeat_POT(struct tgsi_sampler
*tgsi_sampler
,
748 const float s
[QUAD_SIZE
],
749 const float t
[QUAD_SIZE
],
750 const float p
[QUAD_SIZE
],
751 const float c0
[QUAD_SIZE
],
752 enum tgsi_sampler_control control
,
753 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
755 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
757 unsigned level
= samp
->level
;
758 unsigned xpot
= pot_level_size(samp
->xpot
, level
);
759 unsigned ypot
= pot_level_size(samp
->ypot
, level
);
760 unsigned xmax
= (xpot
- 1) & (TILE_SIZE
- 1); /* MIN2(TILE_SIZE, xpot) - 1; */
761 unsigned ymax
= (ypot
- 1) & (TILE_SIZE
- 1); /* MIN2(TILE_SIZE, ypot) - 1; */
762 union tex_tile_address addr
;
765 addr
.bits
.level
= samp
->level
;
767 for (j
= 0; j
< QUAD_SIZE
; j
++) {
770 float u
= s
[j
] * xpot
- 0.5F
;
771 float v
= t
[j
] * ypot
- 0.5F
;
773 int uflr
= util_ifloor(u
);
774 int vflr
= util_ifloor(v
);
776 float xw
= u
- (float)uflr
;
777 float yw
= v
- (float)vflr
;
779 int x0
= uflr
& (xpot
- 1);
780 int y0
= vflr
& (ypot
- 1);
784 /* Can we fetch all four at once:
786 if (x0
< xmax
&& y0
< ymax
) {
787 get_texel_quad_2d_no_border_single_tile(samp
, addr
, x0
, y0
, tx
);
790 unsigned x1
= (x0
+ 1) & (xpot
- 1);
791 unsigned y1
= (y0
+ 1) & (ypot
- 1);
792 get_texel_quad_2d_no_border(samp
, addr
, x0
, y0
, x1
, y1
, tx
);
795 /* interpolate R, G, B, A */
796 for (c
= 0; c
< 4; c
++) {
797 rgba
[c
][j
] = lerp_2d(xw
, yw
,
806 img_filter_2d_nearest_repeat_POT(struct tgsi_sampler
*tgsi_sampler
,
807 const float s
[QUAD_SIZE
],
808 const float t
[QUAD_SIZE
],
809 const float p
[QUAD_SIZE
],
810 const float c0
[QUAD_SIZE
],
811 enum tgsi_sampler_control control
,
812 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
814 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
816 unsigned level
= samp
->level
;
817 unsigned xpot
= pot_level_size(samp
->xpot
, level
);
818 unsigned ypot
= pot_level_size(samp
->ypot
, level
);
819 union tex_tile_address addr
;
822 addr
.bits
.level
= samp
->level
;
824 for (j
= 0; j
< QUAD_SIZE
; j
++) {
827 float u
= s
[j
] * xpot
;
828 float v
= t
[j
] * ypot
;
830 int uflr
= util_ifloor(u
);
831 int vflr
= util_ifloor(v
);
833 int x0
= uflr
& (xpot
- 1);
834 int y0
= vflr
& (ypot
- 1);
836 const float *out
= get_texel_2d_no_border(samp
, addr
, x0
, y0
);
838 for (c
= 0; c
< 4; c
++) {
846 img_filter_2d_nearest_clamp_POT(struct tgsi_sampler
*tgsi_sampler
,
847 const float s
[QUAD_SIZE
],
848 const float t
[QUAD_SIZE
],
849 const float p
[QUAD_SIZE
],
850 const float c0
[QUAD_SIZE
],
851 enum tgsi_sampler_control control
,
852 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
854 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
856 unsigned level
= samp
->level
;
857 unsigned xpot
= pot_level_size(samp
->xpot
, level
);
858 unsigned ypot
= pot_level_size(samp
->ypot
, level
);
859 union tex_tile_address addr
;
862 addr
.bits
.level
= samp
->level
;
864 for (j
= 0; j
< QUAD_SIZE
; j
++) {
867 float u
= s
[j
] * xpot
;
868 float v
= t
[j
] * ypot
;
876 else if (x0
> xpot
- 1)
882 else if (y0
> ypot
- 1)
885 out
= get_texel_2d_no_border(samp
, addr
, x0
, y0
);
887 for (c
= 0; c
< 4; c
++) {
895 img_filter_1d_nearest(struct tgsi_sampler
*tgsi_sampler
,
896 const float s
[QUAD_SIZE
],
897 const float t
[QUAD_SIZE
],
898 const float p
[QUAD_SIZE
],
899 const float c0
[QUAD_SIZE
],
900 enum tgsi_sampler_control control
,
901 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
903 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
904 const struct pipe_texture
*texture
= samp
->texture
;
908 union tex_tile_address addr
;
910 level0
= samp
->level
;
911 width
= u_minify(texture
->width0
, level0
);
916 addr
.bits
.level
= samp
->level
;
918 samp
->nearest_texcoord_s(s
, width
, x
);
920 for (j
= 0; j
< QUAD_SIZE
; j
++) {
921 const float *out
= get_texel_2d(samp
, addr
, x
[j
], 0);
923 for (c
= 0; c
< 4; c
++) {
931 img_filter_2d_nearest(struct tgsi_sampler
*tgsi_sampler
,
932 const float s
[QUAD_SIZE
],
933 const float t
[QUAD_SIZE
],
934 const float p
[QUAD_SIZE
],
935 const float c0
[QUAD_SIZE
],
936 enum tgsi_sampler_control control
,
937 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
939 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
940 const struct pipe_texture
*texture
= samp
->texture
;
944 union tex_tile_address addr
;
947 level0
= samp
->level
;
948 width
= u_minify(texture
->width0
, level0
);
949 height
= u_minify(texture
->height0
, level0
);
955 addr
.bits
.level
= samp
->level
;
957 samp
->nearest_texcoord_s(s
, width
, x
);
958 samp
->nearest_texcoord_t(t
, height
, y
);
960 for (j
= 0; j
< QUAD_SIZE
; j
++) {
961 const float *out
= get_texel_2d(samp
, addr
, x
[j
], y
[j
]);
963 for (c
= 0; c
< 4; c
++) {
970 static INLINE
union tex_tile_address
971 face(union tex_tile_address addr
, unsigned face
)
973 addr
.bits
.face
= face
;
979 img_filter_cube_nearest(struct tgsi_sampler
*tgsi_sampler
,
980 const float s
[QUAD_SIZE
],
981 const float t
[QUAD_SIZE
],
982 const float p
[QUAD_SIZE
],
983 const float c0
[QUAD_SIZE
],
984 enum tgsi_sampler_control control
,
985 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
987 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
988 const struct pipe_texture
*texture
= samp
->texture
;
989 const unsigned *faces
= samp
->faces
; /* zero when not cube-mapping */
993 union tex_tile_address addr
;
995 level0
= samp
->level
;
996 width
= u_minify(texture
->width0
, level0
);
997 height
= u_minify(texture
->height0
, level0
);
1003 addr
.bits
.level
= samp
->level
;
1005 samp
->nearest_texcoord_s(s
, width
, x
);
1006 samp
->nearest_texcoord_t(t
, height
, y
);
1008 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1009 const float *out
= get_texel_2d(samp
, face(addr
, faces
[j
]), x
[j
], y
[j
]);
1011 for (c
= 0; c
< 4; c
++) {
1012 rgba
[c
][j
] = out
[c
];
1019 img_filter_3d_nearest(struct tgsi_sampler
*tgsi_sampler
,
1020 const float s
[QUAD_SIZE
],
1021 const float t
[QUAD_SIZE
],
1022 const float p
[QUAD_SIZE
],
1023 const float c0
[QUAD_SIZE
],
1024 enum tgsi_sampler_control control
,
1025 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1027 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1028 const struct pipe_texture
*texture
= samp
->texture
;
1030 int width
, height
, depth
;
1031 int x
[4], y
[4], z
[4];
1032 union tex_tile_address addr
;
1034 level0
= samp
->level
;
1035 width
= u_minify(texture
->width0
, level0
);
1036 height
= u_minify(texture
->height0
, level0
);
1037 depth
= u_minify(texture
->depth0
, level0
);
1043 samp
->nearest_texcoord_s(s
, width
, x
);
1044 samp
->nearest_texcoord_t(t
, height
, y
);
1045 samp
->nearest_texcoord_p(p
, depth
, z
);
1048 addr
.bits
.level
= samp
->level
;
1050 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1051 const float *out
= get_texel_3d(samp
, addr
, x
[j
], y
[j
], z
[j
]);
1053 for (c
= 0; c
< 4; c
++) {
1054 rgba
[c
][j
] = out
[c
];
1061 img_filter_1d_linear(struct tgsi_sampler
*tgsi_sampler
,
1062 const float s
[QUAD_SIZE
],
1063 const float t
[QUAD_SIZE
],
1064 const float p
[QUAD_SIZE
],
1065 const float c0
[QUAD_SIZE
],
1066 enum tgsi_sampler_control control
,
1067 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1069 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1070 const struct pipe_texture
*texture
= samp
->texture
;
1074 float xw
[4]; /* weights */
1075 union tex_tile_address addr
;
1077 level0
= samp
->level
;
1078 width
= u_minify(texture
->width0
, level0
);
1083 addr
.bits
.level
= samp
->level
;
1085 samp
->linear_texcoord_s(s
, width
, x0
, x1
, xw
);
1087 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1088 const float *tx0
= get_texel_2d(samp
, addr
, x0
[j
], 0);
1089 const float *tx1
= get_texel_2d(samp
, addr
, x1
[j
], 0);
1092 /* interpolate R, G, B, A */
1093 for (c
= 0; c
< 4; c
++) {
1094 rgba
[c
][j
] = lerp(xw
[j
], tx0
[c
], tx1
[c
]);
1101 img_filter_2d_linear(struct tgsi_sampler
*tgsi_sampler
,
1102 const float s
[QUAD_SIZE
],
1103 const float t
[QUAD_SIZE
],
1104 const float p
[QUAD_SIZE
],
1105 const float c0
[QUAD_SIZE
],
1106 enum tgsi_sampler_control control
,
1107 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1109 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1110 const struct pipe_texture
*texture
= samp
->texture
;
1113 int x0
[4], y0
[4], x1
[4], y1
[4];
1114 float xw
[4], yw
[4]; /* weights */
1115 union tex_tile_address addr
;
1117 level0
= samp
->level
;
1118 width
= u_minify(texture
->width0
, level0
);
1119 height
= u_minify(texture
->height0
, level0
);
1125 addr
.bits
.level
= samp
->level
;
1127 samp
->linear_texcoord_s(s
, width
, x0
, x1
, xw
);
1128 samp
->linear_texcoord_t(t
, height
, y0
, y1
, yw
);
1130 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1131 const float *tx0
= get_texel_2d(samp
, addr
, x0
[j
], y0
[j
]);
1132 const float *tx1
= get_texel_2d(samp
, addr
, x1
[j
], y0
[j
]);
1133 const float *tx2
= get_texel_2d(samp
, addr
, x0
[j
], y1
[j
]);
1134 const float *tx3
= get_texel_2d(samp
, addr
, x1
[j
], y1
[j
]);
1137 /* interpolate R, G, B, A */
1138 for (c
= 0; c
< 4; c
++) {
1139 rgba
[c
][j
] = lerp_2d(xw
[j
], yw
[j
],
1148 img_filter_cube_linear(struct tgsi_sampler
*tgsi_sampler
,
1149 const float s
[QUAD_SIZE
],
1150 const float t
[QUAD_SIZE
],
1151 const float p
[QUAD_SIZE
],
1152 const float c0
[QUAD_SIZE
],
1153 enum tgsi_sampler_control control
,
1154 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1156 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1157 const struct pipe_texture
*texture
= samp
->texture
;
1158 const unsigned *faces
= samp
->faces
; /* zero when not cube-mapping */
1161 int x0
[4], y0
[4], x1
[4], y1
[4];
1162 float xw
[4], yw
[4]; /* weights */
1163 union tex_tile_address addr
;
1165 level0
= samp
->level
;
1166 width
= u_minify(texture
->width0
, level0
);
1167 height
= u_minify(texture
->height0
, level0
);
1173 addr
.bits
.level
= samp
->level
;
1175 samp
->linear_texcoord_s(s
, width
, x0
, x1
, xw
);
1176 samp
->linear_texcoord_t(t
, height
, y0
, y1
, yw
);
1178 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1179 union tex_tile_address addrj
= face(addr
, faces
[j
]);
1180 const float *tx0
= get_texel_2d(samp
, addrj
, x0
[j
], y0
[j
]);
1181 const float *tx1
= get_texel_2d(samp
, addrj
, x1
[j
], y0
[j
]);
1182 const float *tx2
= get_texel_2d(samp
, addrj
, x0
[j
], y1
[j
]);
1183 const float *tx3
= get_texel_2d(samp
, addrj
, x1
[j
], y1
[j
]);
1186 /* interpolate R, G, B, A */
1187 for (c
= 0; c
< 4; c
++) {
1188 rgba
[c
][j
] = lerp_2d(xw
[j
], yw
[j
],
1197 img_filter_3d_linear(struct tgsi_sampler
*tgsi_sampler
,
1198 const float s
[QUAD_SIZE
],
1199 const float t
[QUAD_SIZE
],
1200 const float p
[QUAD_SIZE
],
1201 const float c0
[QUAD_SIZE
],
1202 enum tgsi_sampler_control control
,
1203 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1205 const struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1206 const struct pipe_texture
*texture
= samp
->texture
;
1208 int width
, height
, depth
;
1209 int x0
[4], x1
[4], y0
[4], y1
[4], z0
[4], z1
[4];
1210 float xw
[4], yw
[4], zw
[4]; /* interpolation weights */
1211 union tex_tile_address addr
;
1213 level0
= samp
->level
;
1214 width
= u_minify(texture
->width0
, level0
);
1215 height
= u_minify(texture
->height0
, level0
);
1216 depth
= u_minify(texture
->depth0
, level0
);
1219 addr
.bits
.level
= level0
;
1225 samp
->linear_texcoord_s(s
, width
, x0
, x1
, xw
);
1226 samp
->linear_texcoord_t(t
, height
, y0
, y1
, yw
);
1227 samp
->linear_texcoord_p(p
, depth
, z0
, z1
, zw
);
1229 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1232 const float *tx00
= get_texel_3d(samp
, addr
, x0
[j
], y0
[j
], z0
[j
]);
1233 const float *tx01
= get_texel_3d(samp
, addr
, x1
[j
], y0
[j
], z0
[j
]);
1234 const float *tx02
= get_texel_3d(samp
, addr
, x0
[j
], y1
[j
], z0
[j
]);
1235 const float *tx03
= get_texel_3d(samp
, addr
, x1
[j
], y1
[j
], z0
[j
]);
1237 const float *tx10
= get_texel_3d(samp
, addr
, x0
[j
], y0
[j
], z1
[j
]);
1238 const float *tx11
= get_texel_3d(samp
, addr
, x1
[j
], y0
[j
], z1
[j
]);
1239 const float *tx12
= get_texel_3d(samp
, addr
, x0
[j
], y1
[j
], z1
[j
]);
1240 const float *tx13
= get_texel_3d(samp
, addr
, x1
[j
], y1
[j
], z1
[j
]);
1242 /* interpolate R, G, B, A */
1243 for (c
= 0; c
< 4; c
++) {
1244 rgba
[c
][j
] = lerp_3d(xw
[j
], yw
[j
], zw
[j
],
1254 /* Calculate level of detail for every fragment.
1255 * Note that lambda has already been biased by global LOD bias.
1258 compute_lod(const struct pipe_sampler_state
*sampler
,
1259 const float biased_lambda
,
1260 const float lodbias
[QUAD_SIZE
],
1261 float lod
[QUAD_SIZE
])
1265 for (i
= 0; i
< QUAD_SIZE
; i
++) {
1266 lod
[i
] = biased_lambda
+ lodbias
[i
];
1267 lod
[i
] = CLAMP(lod
[i
], sampler
->min_lod
, sampler
->max_lod
);
1273 mip_filter_linear(struct tgsi_sampler
*tgsi_sampler
,
1274 const float s
[QUAD_SIZE
],
1275 const float t
[QUAD_SIZE
],
1276 const float p
[QUAD_SIZE
],
1277 const float c0
[QUAD_SIZE
],
1278 enum tgsi_sampler_control control
,
1279 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1281 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1282 const struct pipe_texture
*texture
= samp
->texture
;
1285 float lod
[QUAD_SIZE
];
1287 if (control
== tgsi_sampler_lod_bias
) {
1288 lambda
= samp
->compute_lambda(samp
, s
, t
, p
) + samp
->sampler
->lod_bias
;
1289 compute_lod(samp
->sampler
, lambda
, c0
, lod
);
1291 assert(control
== tgsi_sampler_lod_explicit
);
1293 memcpy(lod
, c0
, sizeof(lod
));
1296 /* XXX: Take into account all lod values.
1299 level0
= (int)lambda
;
1303 samp
->mag_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1305 else if (level0
>= texture
->last_level
) {
1306 samp
->level
= texture
->last_level
;
1307 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1310 float levelBlend
= lambda
- level0
;
1315 samp
->level
= level0
;
1316 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba0
);
1318 samp
->level
= level0
+1;
1319 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba1
);
1321 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1322 for (c
= 0; c
< 4; c
++) {
1323 rgba
[c
][j
] = lerp(levelBlend
, rgba0
[c
][j
], rgba1
[c
][j
]);
1331 mip_filter_nearest(struct tgsi_sampler
*tgsi_sampler
,
1332 const float s
[QUAD_SIZE
],
1333 const float t
[QUAD_SIZE
],
1334 const float p
[QUAD_SIZE
],
1335 const float c0
[QUAD_SIZE
],
1336 enum tgsi_sampler_control control
,
1337 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1339 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1340 const struct pipe_texture
*texture
= samp
->texture
;
1342 float lod
[QUAD_SIZE
];
1344 if (control
== tgsi_sampler_lod_bias
) {
1345 lambda
= samp
->compute_lambda(samp
, s
, t
, p
) + samp
->sampler
->lod_bias
;
1346 compute_lod(samp
->sampler
, lambda
, c0
, lod
);
1348 assert(control
== tgsi_sampler_lod_explicit
);
1350 memcpy(lod
, c0
, sizeof(lod
));
1353 /* XXX: Take into account all lod values.
1359 samp
->mag_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1362 samp
->level
= (int)(lambda
+ 0.5) ;
1363 samp
->level
= MIN2(samp
->level
, (int)texture
->last_level
);
1364 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1368 printf("RGBA %g %g %g %g, %g %g %g %g, %g %g %g %g, %g %g %g %g\n",
1369 rgba
[0][0], rgba
[1][0], rgba
[2][0], rgba
[3][0],
1370 rgba
[0][1], rgba
[1][1], rgba
[2][1], rgba
[3][1],
1371 rgba
[0][2], rgba
[1][2], rgba
[2][2], rgba
[3][2],
1372 rgba
[0][3], rgba
[1][3], rgba
[2][3], rgba
[3][3]);
1378 mip_filter_none(struct tgsi_sampler
*tgsi_sampler
,
1379 const float s
[QUAD_SIZE
],
1380 const float t
[QUAD_SIZE
],
1381 const float p
[QUAD_SIZE
],
1382 const float c0
[QUAD_SIZE
],
1383 enum tgsi_sampler_control control
,
1384 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1386 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1388 float lod
[QUAD_SIZE
];
1390 if (control
== tgsi_sampler_lod_bias
) {
1391 lambda
= samp
->compute_lambda(samp
, s
, t
, p
) + samp
->sampler
->lod_bias
;
1392 compute_lod(samp
->sampler
, lambda
, c0
, lod
);
1394 assert(control
== tgsi_sampler_lod_explicit
);
1396 memcpy(lod
, c0
, sizeof(lod
));
1399 /* XXX: Take into account all lod values.
1404 samp
->mag_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1407 samp
->min_img_filter(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1414 * Specialized version of mip_filter_linear with hard-wired calls to
1415 * 2d lambda calculation and 2d_linear_repeat_POT img filters.
1418 mip_filter_linear_2d_linear_repeat_POT(
1419 struct tgsi_sampler
*tgsi_sampler
,
1420 const float s
[QUAD_SIZE
],
1421 const float t
[QUAD_SIZE
],
1422 const float p
[QUAD_SIZE
],
1423 const float c0
[QUAD_SIZE
],
1424 enum tgsi_sampler_control control
,
1425 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1427 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1428 const struct pipe_texture
*texture
= samp
->texture
;
1431 float lod
[QUAD_SIZE
];
1433 if (control
== tgsi_sampler_lod_bias
) {
1434 lambda
= samp
->compute_lambda(samp
, s
, t
, p
) + samp
->sampler
->lod_bias
;
1435 compute_lod(samp
->sampler
, lambda
, c0
, lod
);
1437 assert(control
== tgsi_sampler_lod_explicit
);
1439 memcpy(lod
, c0
, sizeof(lod
));
1442 /* XXX: Take into account all lod values.
1445 level0
= (int)lambda
;
1447 /* Catches both negative and large values of level0:
1449 if ((unsigned)level0
>= texture
->last_level
) {
1453 samp
->level
= texture
->last_level
;
1455 img_filter_2d_linear_repeat_POT(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba
);
1458 float levelBlend
= lambda
- level0
;
1463 samp
->level
= level0
;
1464 img_filter_2d_linear_repeat_POT(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba0
);
1466 samp
->level
= level0
+1;
1467 img_filter_2d_linear_repeat_POT(tgsi_sampler
, s
, t
, p
, NULL
, tgsi_sampler_lod_bias
, rgba1
);
1469 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1470 for (c
= 0; c
< 4; c
++) {
1471 rgba
[c
][j
] = lerp(levelBlend
, rgba0
[c
][j
], rgba1
[c
][j
]);
1480 * Do shadow/depth comparisons.
1483 sample_compare(struct tgsi_sampler
*tgsi_sampler
,
1484 const float s
[QUAD_SIZE
],
1485 const float t
[QUAD_SIZE
],
1486 const float p
[QUAD_SIZE
],
1487 const float c0
[QUAD_SIZE
],
1488 enum tgsi_sampler_control control
,
1489 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1491 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1492 const struct pipe_sampler_state
*sampler
= samp
->sampler
;
1493 int j
, k0
, k1
, k2
, k3
;
1496 samp
->mip_filter(tgsi_sampler
, s
, t
, p
, c0
, control
, rgba
);
1499 * Compare texcoord 'p' (aka R) against texture value 'rgba[0]'
1500 * When we sampled the depth texture, the depth value was put into all
1501 * RGBA channels. We look at the red channel here.
1504 /* compare four texcoords vs. four texture samples */
1505 switch (sampler
->compare_func
) {
1506 case PIPE_FUNC_LESS
:
1507 k0
= p
[0] < rgba
[0][0];
1508 k1
= p
[1] < rgba
[0][1];
1509 k2
= p
[2] < rgba
[0][2];
1510 k3
= p
[3] < rgba
[0][3];
1512 case PIPE_FUNC_LEQUAL
:
1513 k0
= p
[0] <= rgba
[0][0];
1514 k1
= p
[1] <= rgba
[0][1];
1515 k2
= p
[2] <= rgba
[0][2];
1516 k3
= p
[3] <= rgba
[0][3];
1518 case PIPE_FUNC_GREATER
:
1519 k0
= p
[0] > rgba
[0][0];
1520 k1
= p
[1] > rgba
[0][1];
1521 k2
= p
[2] > rgba
[0][2];
1522 k3
= p
[3] > rgba
[0][3];
1524 case PIPE_FUNC_GEQUAL
:
1525 k0
= p
[0] >= rgba
[0][0];
1526 k1
= p
[1] >= rgba
[0][1];
1527 k2
= p
[2] >= rgba
[0][2];
1528 k3
= p
[3] >= rgba
[0][3];
1530 case PIPE_FUNC_EQUAL
:
1531 k0
= p
[0] == rgba
[0][0];
1532 k1
= p
[1] == rgba
[0][1];
1533 k2
= p
[2] == rgba
[0][2];
1534 k3
= p
[3] == rgba
[0][3];
1536 case PIPE_FUNC_NOTEQUAL
:
1537 k0
= p
[0] != rgba
[0][0];
1538 k1
= p
[1] != rgba
[0][1];
1539 k2
= p
[2] != rgba
[0][2];
1540 k3
= p
[3] != rgba
[0][3];
1542 case PIPE_FUNC_ALWAYS
:
1543 k0
= k1
= k2
= k3
= 1;
1545 case PIPE_FUNC_NEVER
:
1546 k0
= k1
= k2
= k3
= 0;
1549 k0
= k1
= k2
= k3
= 0;
1554 /* convert four pass/fail values to an intensity in [0,1] */
1555 val
= 0.25F
* (k0
+ k1
+ k2
+ k3
);
1557 /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */
1558 for (j
= 0; j
< 4; j
++) {
1559 rgba
[0][j
] = rgba
[1][j
] = rgba
[2][j
] = val
;
1566 * Compute which cube face is referenced by each texcoord and put that
1567 * info into the sampler faces[] array. Then sample the cube faces
1570 sample_cube(struct tgsi_sampler
*tgsi_sampler
,
1571 const float s
[QUAD_SIZE
],
1572 const float t
[QUAD_SIZE
],
1573 const float p
[QUAD_SIZE
],
1574 const float c0
[QUAD_SIZE
],
1575 enum tgsi_sampler_control control
,
1576 float rgba
[NUM_CHANNELS
][QUAD_SIZE
])
1578 struct sp_sampler_varient
*samp
= sp_sampler_varient(tgsi_sampler
);
1580 float ssss
[4], tttt
[4];
1584 direction target sc tc ma
1585 ---------- ------------------------------- --- --- ---
1586 +rx TEXTURE_CUBE_MAP_POSITIVE_X_EXT -rz -ry rx
1587 -rx TEXTURE_CUBE_MAP_NEGATIVE_X_EXT +rz -ry rx
1588 +ry TEXTURE_CUBE_MAP_POSITIVE_Y_EXT +rx +rz ry
1589 -ry TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT +rx -rz ry
1590 +rz TEXTURE_CUBE_MAP_POSITIVE_Z_EXT +rx -ry rz
1591 -rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz
1593 for (j
= 0; j
< QUAD_SIZE
; j
++) {
1597 const float arx
= fabsf(rx
), ary
= fabsf(ry
), arz
= fabsf(rz
);
1601 if (arx
>= ary
&& arx
>= arz
) {
1603 face
= PIPE_TEX_FACE_POS_X
;
1609 face
= PIPE_TEX_FACE_NEG_X
;
1615 else if (ary
>= arx
&& ary
>= arz
) {
1617 face
= PIPE_TEX_FACE_POS_Y
;
1623 face
= PIPE_TEX_FACE_NEG_Y
;
1631 face
= PIPE_TEX_FACE_POS_Z
;
1637 face
= PIPE_TEX_FACE_NEG_Z
;
1645 const float ima
= 1.0 / ma
;
1646 ssss
[j
] = ( sc
* ima
+ 1.0F
) * 0.5F
;
1647 tttt
[j
] = ( tc
* ima
+ 1.0F
) * 0.5F
;
1648 samp
->faces
[j
] = face
;
1652 /* In our little pipeline, the compare stage is next. If compare
1653 * is not active, this will point somewhere deeper into the
1654 * pipeline, eg. to mip_filter or even img_filter.
1656 samp
->compare(tgsi_sampler
, ssss
, tttt
, NULL
, c0
, control
, rgba
);
1661 static wrap_nearest_func
1662 get_nearest_unorm_wrap(unsigned mode
)
1665 case PIPE_TEX_WRAP_CLAMP
:
1666 return wrap_nearest_unorm_clamp
;
1667 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
1668 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
1669 return wrap_nearest_unorm_clamp_to_border
;
1672 return wrap_nearest_unorm_clamp
;
1677 static wrap_nearest_func
1678 get_nearest_wrap(unsigned mode
)
1681 case PIPE_TEX_WRAP_REPEAT
:
1682 return wrap_nearest_repeat
;
1683 case PIPE_TEX_WRAP_CLAMP
:
1684 return wrap_nearest_clamp
;
1685 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
1686 return wrap_nearest_clamp_to_edge
;
1687 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
1688 return wrap_nearest_clamp_to_border
;
1689 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
1690 return wrap_nearest_mirror_repeat
;
1691 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
1692 return wrap_nearest_mirror_clamp
;
1693 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
1694 return wrap_nearest_mirror_clamp_to_edge
;
1695 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
1696 return wrap_nearest_mirror_clamp_to_border
;
1699 return wrap_nearest_repeat
;
1704 static wrap_linear_func
1705 get_linear_unorm_wrap(unsigned mode
)
1708 case PIPE_TEX_WRAP_CLAMP
:
1709 return wrap_linear_unorm_clamp
;
1710 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
1711 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
1712 return wrap_linear_unorm_clamp_to_border
;
1715 return wrap_linear_unorm_clamp
;
1720 static wrap_linear_func
1721 get_linear_wrap(unsigned mode
)
1724 case PIPE_TEX_WRAP_REPEAT
:
1725 return wrap_linear_repeat
;
1726 case PIPE_TEX_WRAP_CLAMP
:
1727 return wrap_linear_clamp
;
1728 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
1729 return wrap_linear_clamp_to_edge
;
1730 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
1731 return wrap_linear_clamp_to_border
;
1732 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
1733 return wrap_linear_mirror_repeat
;
1734 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
1735 return wrap_linear_mirror_clamp
;
1736 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
1737 return wrap_linear_mirror_clamp_to_edge
;
1738 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
1739 return wrap_linear_mirror_clamp_to_border
;
1742 return wrap_linear_repeat
;
1747 static compute_lambda_func
1748 get_lambda_func(const union sp_sampler_key key
)
1750 if (key
.bits
.processor
== TGSI_PROCESSOR_VERTEX
)
1751 return compute_lambda_vert
;
1753 switch (key
.bits
.target
) {
1754 case PIPE_TEXTURE_1D
:
1755 return compute_lambda_1d
;
1756 case PIPE_TEXTURE_2D
:
1757 case PIPE_TEXTURE_CUBE
:
1758 return compute_lambda_2d
;
1759 case PIPE_TEXTURE_3D
:
1760 return compute_lambda_3d
;
1763 return compute_lambda_1d
;
1769 get_img_filter(const union sp_sampler_key key
,
1771 const struct pipe_sampler_state
*sampler
)
1773 switch (key
.bits
.target
) {
1774 case PIPE_TEXTURE_1D
:
1775 if (filter
== PIPE_TEX_FILTER_NEAREST
)
1776 return img_filter_1d_nearest
;
1778 return img_filter_1d_linear
;
1780 case PIPE_TEXTURE_2D
:
1781 /* Try for fast path:
1783 if (key
.bits
.is_pot
&&
1784 sampler
->wrap_s
== sampler
->wrap_t
&&
1785 sampler
->normalized_coords
)
1787 switch (sampler
->wrap_s
) {
1788 case PIPE_TEX_WRAP_REPEAT
:
1790 case PIPE_TEX_FILTER_NEAREST
:
1791 return img_filter_2d_nearest_repeat_POT
;
1792 case PIPE_TEX_FILTER_LINEAR
:
1793 return img_filter_2d_linear_repeat_POT
;
1798 case PIPE_TEX_WRAP_CLAMP
:
1800 case PIPE_TEX_FILTER_NEAREST
:
1801 return img_filter_2d_nearest_clamp_POT
;
1807 /* Otherwise use default versions:
1809 if (filter
== PIPE_TEX_FILTER_NEAREST
)
1810 return img_filter_2d_nearest
;
1812 return img_filter_2d_linear
;
1814 case PIPE_TEXTURE_CUBE
:
1815 if (filter
== PIPE_TEX_FILTER_NEAREST
)
1816 return img_filter_cube_nearest
;
1818 return img_filter_cube_linear
;
1820 case PIPE_TEXTURE_3D
:
1821 if (filter
== PIPE_TEX_FILTER_NEAREST
)
1822 return img_filter_3d_nearest
;
1824 return img_filter_3d_linear
;
1828 return img_filter_1d_nearest
;
1834 * Bind the given texture object and texture cache to the sampler varient.
1837 sp_sampler_varient_bind_texture( struct sp_sampler_varient
*samp
,
1838 struct softpipe_tex_tile_cache
*tex_cache
,
1839 const struct pipe_texture
*texture
)
1841 const struct pipe_sampler_state
*sampler
= samp
->sampler
;
1843 samp
->texture
= texture
;
1844 samp
->cache
= tex_cache
;
1845 samp
->xpot
= util_unsigned_logbase2( texture
->width0
);
1846 samp
->ypot
= util_unsigned_logbase2( texture
->height0
);
1847 samp
->level
= CLAMP((int) sampler
->min_lod
, 0, (int) texture
->last_level
);
1852 sp_sampler_varient_destroy( struct sp_sampler_varient
*samp
)
1859 * Create a sampler varient for a given set of non-orthogonal state.
1861 struct sp_sampler_varient
*
1862 sp_create_sampler_varient( const struct pipe_sampler_state
*sampler
,
1863 const union sp_sampler_key key
)
1865 struct sp_sampler_varient
*samp
= CALLOC_STRUCT(sp_sampler_varient
);
1869 samp
->sampler
= sampler
;
1872 /* Note that (for instance) linear_texcoord_s and
1873 * nearest_texcoord_s may be active at the same time, if the
1874 * sampler min_img_filter differs from its mag_img_filter.
1876 if (sampler
->normalized_coords
) {
1877 samp
->linear_texcoord_s
= get_linear_wrap( sampler
->wrap_s
);
1878 samp
->linear_texcoord_t
= get_linear_wrap( sampler
->wrap_t
);
1879 samp
->linear_texcoord_p
= get_linear_wrap( sampler
->wrap_r
);
1881 samp
->nearest_texcoord_s
= get_nearest_wrap( sampler
->wrap_s
);
1882 samp
->nearest_texcoord_t
= get_nearest_wrap( sampler
->wrap_t
);
1883 samp
->nearest_texcoord_p
= get_nearest_wrap( sampler
->wrap_r
);
1886 samp
->linear_texcoord_s
= get_linear_unorm_wrap( sampler
->wrap_s
);
1887 samp
->linear_texcoord_t
= get_linear_unorm_wrap( sampler
->wrap_t
);
1888 samp
->linear_texcoord_p
= get_linear_unorm_wrap( sampler
->wrap_r
);
1890 samp
->nearest_texcoord_s
= get_nearest_unorm_wrap( sampler
->wrap_s
);
1891 samp
->nearest_texcoord_t
= get_nearest_unorm_wrap( sampler
->wrap_t
);
1892 samp
->nearest_texcoord_p
= get_nearest_unorm_wrap( sampler
->wrap_r
);
1895 samp
->compute_lambda
= get_lambda_func( key
);
1897 samp
->min_img_filter
= get_img_filter(key
, sampler
->min_img_filter
, sampler
);
1898 samp
->mag_img_filter
= get_img_filter(key
, sampler
->mag_img_filter
, sampler
);
1900 switch (sampler
->min_mip_filter
) {
1901 case PIPE_TEX_MIPFILTER_NONE
:
1902 if (sampler
->min_img_filter
== sampler
->mag_img_filter
)
1903 samp
->mip_filter
= samp
->min_img_filter
;
1905 samp
->mip_filter
= mip_filter_none
;
1908 case PIPE_TEX_MIPFILTER_NEAREST
:
1909 samp
->mip_filter
= mip_filter_nearest
;
1912 case PIPE_TEX_MIPFILTER_LINEAR
:
1913 if (key
.bits
.is_pot
&&
1914 sampler
->min_img_filter
== sampler
->mag_img_filter
&&
1915 sampler
->normalized_coords
&&
1916 sampler
->wrap_s
== PIPE_TEX_WRAP_REPEAT
&&
1917 sampler
->wrap_t
== PIPE_TEX_WRAP_REPEAT
&&
1918 sampler
->min_img_filter
== PIPE_TEX_FILTER_LINEAR
)
1920 samp
->mip_filter
= mip_filter_linear_2d_linear_repeat_POT
;
1924 samp
->mip_filter
= mip_filter_linear
;
1929 if (sampler
->compare_mode
!= PIPE_TEX_COMPARE_NONE
) {
1930 samp
->compare
= sample_compare
;
1933 /* Skip compare operation by promoting the mip_filter function
1936 samp
->compare
= samp
->mip_filter
;
1939 if (key
.bits
.target
== PIPE_TEXTURE_CUBE
) {
1940 samp
->base
.get_samples
= sample_cube
;
1948 /* Skip cube face determination by promoting the compare
1951 samp
->base
.get_samples
= samp
->compare
;