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
,
152 u_sampler_view_default_template(&templ
,
155 templ
.u
.tex
.first_level
= stObj
->base
.BaseLevel
;
157 if (swizzle
!= SWIZZLE_NOOP
) {
158 templ
.swizzle_r
= GET_SWZ(swizzle
, 0);
159 templ
.swizzle_g
= GET_SWZ(swizzle
, 1);
160 templ
.swizzle_b
= GET_SWZ(swizzle
, 2);
161 templ
.swizzle_a
= GET_SWZ(swizzle
, 3);
164 return pipe
->create_sampler_view(pipe
, stObj
->pt
, &templ
);
168 static struct pipe_sampler_view
*
169 st_get_texture_sampler_view_from_stobj(struct st_texture_object
*stObj
,
170 struct pipe_context
*pipe
,
171 const struct gl_sampler_object
*samp
,
172 enum pipe_format format
)
174 if (!stObj
|| !stObj
->pt
) {
178 if (!stObj
->sampler_view
) {
179 stObj
->sampler_view
=
180 st_create_texture_sampler_view_from_stobj(pipe
, stObj
, samp
, format
);
183 return stObj
->sampler_view
;
188 update_single_texture(struct st_context
*st
,
189 struct pipe_sampler_view
**sampler_view
,
192 struct pipe_context
*pipe
= st
->pipe
;
193 struct gl_context
*ctx
= st
->ctx
;
194 const struct gl_sampler_object
*samp
;
195 struct gl_texture_object
*texObj
;
196 struct st_texture_object
*stObj
;
197 enum pipe_format st_view_format
;
200 samp
= _mesa_get_samplerobj(ctx
, texUnit
);
202 texObj
= ctx
->Texture
.Unit
[texUnit
]._Current
;
205 texObj
= _mesa_get_fallback_texture(ctx
, TEXTURE_2D_INDEX
);
206 samp
= &texObj
->Sampler
;
208 stObj
= st_texture_object(texObj
);
210 retval
= st_finalize_texture(ctx
, st
->pipe
, texObj
);
216 /* Determine the format of the texture sampler view */
217 st_view_format
= stObj
->pt
->format
;
219 const struct st_texture_image
*firstImage
=
220 st_texture_image(stObj
->base
.Image
[0][stObj
->base
.BaseLevel
]);
221 const gl_format texFormat
= firstImage
->base
.TexFormat
;
222 enum pipe_format firstImageFormat
=
223 st_mesa_format_to_pipe_format(texFormat
);
225 if ((samp
->sRGBDecode
== GL_SKIP_DECODE_EXT
) &&
226 (_mesa_get_format_color_encoding(texFormat
) == GL_SRGB
)) {
227 /* Don't do sRGB->RGB conversion. Interpret the texture data as
230 const gl_format linearFormat
=
231 _mesa_get_srgb_format_linear(texFormat
);
232 firstImageFormat
= st_mesa_format_to_pipe_format(linearFormat
);
235 if (firstImageFormat
!= stObj
->pt
->format
)
236 st_view_format
= firstImageFormat
;
239 /* if sampler view has changed dereference it */
240 if (stObj
->sampler_view
) {
241 if (check_sampler_swizzle(stObj
->sampler_view
,
242 stObj
->base
._Swizzle
,
244 (st_view_format
!= stObj
->sampler_view
->format
) ||
245 stObj
->base
.BaseLevel
!= stObj
->sampler_view
->u
.tex
.first_level
) {
246 pipe_sampler_view_reference(&stObj
->sampler_view
, NULL
);
250 *sampler_view
= st_get_texture_sampler_view_from_stobj(stObj
, pipe
,
258 update_vertex_textures(struct st_context
*st
)
260 const struct gl_context
*ctx
= st
->ctx
;
261 struct gl_vertex_program
*vprog
= ctx
->VertexProgram
._Current
;
264 if (!vprog
->Base
.SamplersUsed
&& st
->state
.num_vertex_textures
== 0)
267 st
->state
.num_vertex_textures
= 0;
269 /* loop over sampler units (aka tex image units) */
270 for (su
= 0; su
< ctx
->Const
.MaxTextureImageUnits
; su
++) {
271 struct pipe_sampler_view
*sampler_view
= NULL
;
272 if (vprog
->Base
.SamplersUsed
& (1 << su
)) {
276 texUnit
= vprog
->Base
.SamplerUnits
[su
];
278 retval
= update_single_texture(st
, &sampler_view
, texUnit
);
279 if (retval
== GL_FALSE
)
282 st
->state
.num_vertex_textures
= su
+ 1;
284 pipe_sampler_view_reference(&st
->state
.sampler_vertex_views
[su
],
288 if (ctx
->Const
.MaxVertexTextureImageUnits
> 0) {
289 GLuint numUnits
= MIN2(st
->state
.num_vertex_textures
,
290 ctx
->Const
.MaxVertexTextureImageUnits
);
291 cso_set_vertex_sampler_views(st
->cso_context
,
293 st
->state
.sampler_vertex_views
);
299 update_fragment_textures(struct st_context
*st
)
301 const struct gl_context
*ctx
= st
->ctx
;
302 struct gl_fragment_program
*fprog
= ctx
->FragmentProgram
._Current
;
304 int old_max
= st
->state
.num_textures
;
305 GLbitfield samplers_used
= fprog
->Base
.SamplersUsed
;
307 st
->state
.num_textures
= 0;
309 /* loop over sampler units (aka tex image units) */
310 for (su
= 0; su
< ctx
->Const
.MaxTextureImageUnits
; su
++, samplers_used
>>= 1) {
311 struct pipe_sampler_view
*sampler_view
= NULL
;
313 if (samplers_used
& 1) {
317 texUnit
= fprog
->Base
.SamplerUnits
[su
];
319 retval
= update_single_texture(st
, &sampler_view
, texUnit
);
320 if (retval
== GL_FALSE
)
323 st
->state
.num_textures
= su
+ 1;
324 } else if (samplers_used
== 0 && su
>= old_max
) {
325 /* if we've reset all the old views and we have no more new ones */
329 pipe_sampler_view_reference(&st
->state
.sampler_views
[su
], sampler_view
);
332 cso_set_fragment_sampler_views(st
->cso_context
,
333 st
->state
.num_textures
,
334 st
->state
.sampler_views
);
338 const struct st_tracked_state st_update_texture
= {
339 "st_update_texture", /* name */
341 _NEW_TEXTURE
, /* mesa */
342 ST_NEW_FRAGMENT_PROGRAM
, /* st */
344 update_fragment_textures
/* update */
348 const struct st_tracked_state st_update_vertex_texture
= {
349 "st_update_vertex_texture", /* name */
351 _NEW_TEXTURE
, /* mesa */
352 ST_NEW_VERTEX_PROGRAM
, /* st */
354 update_vertex_textures
/* update */
360 finalize_textures(struct st_context
*st
)
362 struct gl_context
*ctx
= st
->ctx
;
363 struct gl_fragment_program
*fprog
= ctx
->FragmentProgram
._Current
;
364 const GLboolean prev_missing_textures
= st
->missing_textures
;
367 st
->missing_textures
= GL_FALSE
;
369 for (su
= 0; su
< ctx
->Const
.MaxTextureCoordUnits
; su
++) {
370 if (fprog
->Base
.SamplersUsed
& (1 << su
)) {
371 const GLuint texUnit
= fprog
->Base
.SamplerUnits
[su
];
372 struct gl_texture_object
*texObj
373 = ctx
->Texture
.Unit
[texUnit
]._Current
;
378 retval
= st_finalize_texture(ctx
, st
->pipe
, texObj
);
381 st
->missing_textures
= GL_TRUE
;
388 if (prev_missing_textures
!= st
->missing_textures
)
389 st
->dirty
.st
|= ST_NEW_FRAGMENT_PROGRAM
;
393 const struct st_tracked_state st_finalize_textures
= {
394 "st_finalize_textures", /* name */
396 _NEW_TEXTURE
, /* mesa */
399 finalize_textures
/* update */