1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Keith Whitwell <keith@tungstengraphics.com>
35 #include "main/macros.h"
36 #include "main/mtypes.h"
37 #include "main/samplerobj.h"
38 #include "main/texobj.h"
39 #include "program/prog_instruction.h"
41 #include "st_context.h"
43 #include "st_texture.h"
44 #include "st_format.h"
45 #include "st_cb_texture.h"
46 #include "pipe/p_context.h"
47 #include "util/u_format.h"
48 #include "util/u_inlines.h"
49 #include "cso_cache/cso_context.h"
53 * Combine depth texture mode with "swizzle" so that depth mode swizzling
54 * takes place before texture swizzling, and return the resulting swizzle.
55 * If the format is not a depth format, return "swizzle" unchanged.
57 * \param format PIPE_FORMAT_*.
58 * \param swizzle Texture swizzle, a bitmask computed using MAKE_SWIZZLE4.
59 * \param depthmode One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA, GL_RED.
62 apply_depthmode(enum pipe_format format
, GLuint swizzle
, GLenum depthmode
)
64 const struct util_format_description
*desc
=
65 util_format_description(format
);
66 unsigned char swiz
[4];
69 if (desc
->colorspace
!= UTIL_FORMAT_COLORSPACE_ZS
||
70 desc
->swizzle
[0] == UTIL_FORMAT_SWIZZLE_NONE
) {
71 /* Not a depth format. */
75 for (i
= 0; i
< 4; i
++)
76 swiz
[i
] = GET_SWZ(swizzle
, i
);
80 /* Rewrite reads from W to ONE, and reads from XYZ to XXX. */
81 for (i
= 0; i
< 4; i
++)
82 if (swiz
[i
] == SWIZZLE_W
)
83 swiz
[i
] = SWIZZLE_ONE
;
84 else if (swiz
[i
] < SWIZZLE_W
)
89 /* Rewrite reads from XYZW to XXXX. */
90 for (i
= 0; i
< 4; i
++)
91 if (swiz
[i
] <= SWIZZLE_W
)
96 /* Rewrite reads from W to X, and reads from XYZ to 000. */
97 for (i
= 0; i
< 4; i
++)
98 if (swiz
[i
] == SWIZZLE_W
)
100 else if (swiz
[i
] < SWIZZLE_W
)
101 swiz
[i
] = SWIZZLE_ZERO
;
104 /* Rewrite reads W to 1, XYZ to X00 */
105 for (i
= 0; i
< 4; i
++)
106 if (swiz
[i
] == SWIZZLE_W
)
107 swiz
[i
] = SWIZZLE_ONE
;
108 else if (swiz
[i
] == SWIZZLE_Y
|| swiz
[i
] == SWIZZLE_Z
)
109 swiz
[i
] = SWIZZLE_ZERO
;
113 return MAKE_SWIZZLE4(swiz
[0], swiz
[1], swiz
[2], swiz
[3]);
118 * Return TRUE if the swizzling described by "swizzle" and
119 * "depthmode" (for depth textures only) is different from the swizzling
120 * set in the given sampler view.
122 * \param sv A sampler view.
123 * \param swizzle Texture swizzle, a bitmask computed using MAKE_SWIZZLE4.
124 * \param depthmode One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA.
127 check_sampler_swizzle(struct pipe_sampler_view
*sv
,
128 GLuint swizzle
, GLenum depthmode
)
130 swizzle
= apply_depthmode(sv
->texture
->format
, swizzle
, depthmode
);
132 if ((sv
->swizzle_r
!= GET_SWZ(swizzle
, 0)) ||
133 (sv
->swizzle_g
!= GET_SWZ(swizzle
, 1)) ||
134 (sv
->swizzle_b
!= GET_SWZ(swizzle
, 2)) ||
135 (sv
->swizzle_a
!= GET_SWZ(swizzle
, 3)))
141 static struct pipe_sampler_view
*
142 st_create_texture_sampler_view_from_stobj(struct pipe_context
*pipe
,
143 struct st_texture_object
*stObj
,
144 const struct gl_sampler_object
*samp
,
145 enum pipe_format format
)
147 struct pipe_sampler_view templ
;
148 GLuint swizzle
= apply_depthmode(stObj
->pt
->format
,
149 stObj
->base
._Swizzle
,
150 stObj
->base
.DepthMode
);
152 u_sampler_view_default_template(&templ
,
156 if (stObj
->pt
->target
== PIPE_BUFFER
) {
159 const struct util_format_description
*desc
160 = util_format_description(templ
.format
);
162 base
= stObj
->base
.BufferOffset
;
163 if (base
>= stObj
->pt
->width0
)
165 size
= MIN2(stObj
->pt
->width0
- base
, (unsigned)stObj
->base
.BufferSize
);
167 f
= ((base
* 8) / desc
->block
.bits
) * desc
->block
.width
;
168 n
= ((size
* 8) / desc
->block
.bits
) * desc
->block
.width
;
171 templ
.u
.buf
.first_element
= f
;
172 templ
.u
.buf
.last_element
= f
+ (n
- 1);
174 templ
.u
.tex
.first_level
= stObj
->base
.BaseLevel
;
177 if (swizzle
!= SWIZZLE_NOOP
) {
178 templ
.swizzle_r
= GET_SWZ(swizzle
, 0);
179 templ
.swizzle_g
= GET_SWZ(swizzle
, 1);
180 templ
.swizzle_b
= GET_SWZ(swizzle
, 2);
181 templ
.swizzle_a
= GET_SWZ(swizzle
, 3);
184 return pipe
->create_sampler_view(pipe
, stObj
->pt
, &templ
);
188 static struct pipe_sampler_view
*
189 st_get_texture_sampler_view_from_stobj(struct st_texture_object
*stObj
,
190 struct pipe_context
*pipe
,
191 const struct gl_sampler_object
*samp
,
192 enum pipe_format format
)
194 if (!stObj
|| !stObj
->pt
) {
198 if (!stObj
->sampler_view
) {
199 stObj
->sampler_view
=
200 st_create_texture_sampler_view_from_stobj(pipe
, stObj
, samp
, format
);
203 return stObj
->sampler_view
;
208 update_single_texture(struct st_context
*st
,
209 struct pipe_sampler_view
**sampler_view
,
212 struct pipe_context
*pipe
= st
->pipe
;
213 struct gl_context
*ctx
= st
->ctx
;
214 const struct gl_sampler_object
*samp
;
215 struct gl_texture_object
*texObj
;
216 struct st_texture_object
*stObj
;
217 enum pipe_format view_format
;
220 samp
= _mesa_get_samplerobj(ctx
, texUnit
);
222 texObj
= ctx
->Texture
.Unit
[texUnit
]._Current
;
225 texObj
= _mesa_get_fallback_texture(ctx
, TEXTURE_2D_INDEX
);
226 samp
= &texObj
->Sampler
;
228 stObj
= st_texture_object(texObj
);
230 retval
= st_finalize_texture(ctx
, st
->pipe
, texObj
);
236 /* Determine the format of the texture sampler view */
237 if (texObj
->Target
== GL_TEXTURE_BUFFER
) {
239 st_mesa_format_to_pipe_format(stObj
->base
._BufferObjectFormat
);
242 view_format
= stObj
->pt
->format
;
244 /* If sRGB decoding is off, use the linear format */
245 if (samp
->sRGBDecode
== GL_SKIP_DECODE_EXT
) {
246 view_format
= util_format_linear(view_format
);
250 /* if sampler view has changed dereference it */
251 if (stObj
->sampler_view
) {
252 if (check_sampler_swizzle(stObj
->sampler_view
,
253 stObj
->base
._Swizzle
,
254 stObj
->base
.DepthMode
) ||
255 (view_format
!= stObj
->sampler_view
->format
) ||
256 stObj
->base
.BaseLevel
!= stObj
->sampler_view
->u
.tex
.first_level
) {
257 pipe_sampler_view_reference(&stObj
->sampler_view
, NULL
);
261 *sampler_view
= st_get_texture_sampler_view_from_stobj(stObj
, pipe
,
270 update_textures(struct st_context
*st
,
271 unsigned shader_stage
,
272 const struct gl_program
*prog
,
274 struct pipe_sampler_view
**sampler_views
,
275 unsigned *num_textures
)
277 const GLuint old_max
= *num_textures
;
278 GLbitfield samplers_used
= prog
->SamplersUsed
;
279 GLuint unit
, new_count
;
281 if (samplers_used
== 0x0 && old_max
== 0)
286 /* loop over sampler units (aka tex image units) */
287 for (unit
= 0; unit
< max_units
; unit
++, samplers_used
>>= 1) {
288 struct pipe_sampler_view
*sampler_view
= NULL
;
290 if (samplers_used
& 1) {
291 const GLuint texUnit
= prog
->SamplerUnits
[unit
];
294 retval
= update_single_texture(st
, &sampler_view
, texUnit
);
295 if (retval
== GL_FALSE
)
298 *num_textures
= unit
+ 1;
300 else if (samplers_used
== 0 && unit
>= old_max
) {
301 /* if we've reset all the old views and we have no more new ones */
305 pipe_sampler_view_reference(&(sampler_views
[unit
]), sampler_view
);
308 /* Ex: if old_max = 3 and *num_textures = 1, we need to pass an
309 * array of views={X, NULL, NULL} to unref the old texture views
310 * at positions [1] and [2].
312 new_count
= MAX2(*num_textures
, old_max
);
313 assert(new_count
<= max_units
);
315 cso_set_sampler_views(st
->cso_context
,
324 update_vertex_textures(struct st_context
*st
)
326 const struct gl_context
*ctx
= st
->ctx
;
328 if (ctx
->Const
.MaxVertexTextureImageUnits
> 0) {
331 &ctx
->VertexProgram
._Current
->Base
,
332 ctx
->Const
.MaxVertexTextureImageUnits
,
333 st
->state
.sampler_views
[PIPE_SHADER_VERTEX
],
334 &st
->state
.num_sampler_views
[PIPE_SHADER_VERTEX
]);
340 update_fragment_textures(struct st_context
*st
)
342 const struct gl_context
*ctx
= st
->ctx
;
345 PIPE_SHADER_FRAGMENT
,
346 &ctx
->FragmentProgram
._Current
->Base
,
347 ctx
->Const
.MaxTextureImageUnits
,
348 st
->state
.sampler_views
[PIPE_SHADER_FRAGMENT
],
349 &st
->state
.num_sampler_views
[PIPE_SHADER_FRAGMENT
]);
354 update_geometry_textures(struct st_context
*st
)
356 const struct gl_context
*ctx
= st
->ctx
;
358 if (ctx
->GeometryProgram
._Current
) {
360 PIPE_SHADER_GEOMETRY
,
361 &ctx
->GeometryProgram
._Current
->Base
,
362 ctx
->Const
.MaxTextureImageUnits
,
363 st
->state
.sampler_views
[PIPE_SHADER_GEOMETRY
],
364 &st
->state
.num_sampler_views
[PIPE_SHADER_GEOMETRY
]);
369 const struct st_tracked_state st_update_fragment_texture
= {
370 "st_update_texture", /* name */
372 _NEW_TEXTURE
, /* mesa */
373 ST_NEW_FRAGMENT_PROGRAM
, /* st */
375 update_fragment_textures
/* update */
379 const struct st_tracked_state st_update_vertex_texture
= {
380 "st_update_vertex_texture", /* name */
382 _NEW_TEXTURE
, /* mesa */
383 ST_NEW_VERTEX_PROGRAM
, /* st */
385 update_vertex_textures
/* update */
389 const struct st_tracked_state st_update_geometry_texture
= {
390 "st_update_geometry_texture", /* name */
392 _NEW_TEXTURE
, /* mesa */
393 ST_NEW_GEOMETRY_PROGRAM
, /* st */
395 update_geometry_textures
/* update */
401 finalize_textures(struct st_context
*st
)
403 struct gl_context
*ctx
= st
->ctx
;
404 struct gl_fragment_program
*fprog
= ctx
->FragmentProgram
._Current
;
405 const GLboolean prev_missing_textures
= st
->missing_textures
;
408 st
->missing_textures
= GL_FALSE
;
410 for (su
= 0; su
< ctx
->Const
.MaxTextureCoordUnits
; su
++) {
411 if (fprog
->Base
.SamplersUsed
& (1 << su
)) {
412 const GLuint texUnit
= fprog
->Base
.SamplerUnits
[su
];
413 struct gl_texture_object
*texObj
414 = ctx
->Texture
.Unit
[texUnit
]._Current
;
419 retval
= st_finalize_texture(ctx
, st
->pipe
, texObj
);
422 st
->missing_textures
= GL_TRUE
;
429 if (prev_missing_textures
!= st
->missing_textures
)
430 st
->dirty
.st
|= ST_NEW_FRAGMENT_PROGRAM
;
434 const struct st_tracked_state st_finalize_textures
= {
435 "st_finalize_textures", /* name */
437 _NEW_TEXTURE
, /* mesa */
440 finalize_textures
/* update */