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/glformats.h"
38 #include "main/samplerobj.h"
39 #include "main/texobj.h"
41 #include "st_context.h"
42 #include "st_cb_texture.h"
43 #include "st_format.h"
45 #include "st_texture.h"
46 #include "pipe/p_context.h"
47 #include "pipe/p_defines.h"
49 #include "cso_cache/cso_context.h"
51 #include "util/u_format.h"
55 * Convert GLenum texcoord wrap tokens to pipe tokens.
58 gl_wrap_xlate(GLenum wrap
)
62 return PIPE_TEX_WRAP_REPEAT
;
64 return PIPE_TEX_WRAP_CLAMP
;
65 case GL_CLAMP_TO_EDGE
:
66 return PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
67 case GL_CLAMP_TO_BORDER
:
68 return PIPE_TEX_WRAP_CLAMP_TO_BORDER
;
69 case GL_MIRRORED_REPEAT
:
70 return PIPE_TEX_WRAP_MIRROR_REPEAT
;
71 case GL_MIRROR_CLAMP_EXT
:
72 return PIPE_TEX_WRAP_MIRROR_CLAMP
;
73 case GL_MIRROR_CLAMP_TO_EDGE_EXT
:
74 return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
;
75 case GL_MIRROR_CLAMP_TO_BORDER_EXT
:
76 return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
;
85 gl_filter_to_mip_filter(GLenum filter
)
90 return PIPE_TEX_MIPFILTER_NONE
;
92 case GL_NEAREST_MIPMAP_NEAREST
:
93 case GL_LINEAR_MIPMAP_NEAREST
:
94 return PIPE_TEX_MIPFILTER_NEAREST
;
96 case GL_NEAREST_MIPMAP_LINEAR
:
97 case GL_LINEAR_MIPMAP_LINEAR
:
98 return PIPE_TEX_MIPFILTER_LINEAR
;
102 return PIPE_TEX_MIPFILTER_NONE
;
108 gl_filter_to_img_filter(GLenum filter
)
112 case GL_NEAREST_MIPMAP_NEAREST
:
113 case GL_NEAREST_MIPMAP_LINEAR
:
114 return PIPE_TEX_FILTER_NEAREST
;
117 case GL_LINEAR_MIPMAP_NEAREST
:
118 case GL_LINEAR_MIPMAP_LINEAR
:
119 return PIPE_TEX_FILTER_LINEAR
;
123 return PIPE_TEX_FILTER_NEAREST
;
129 convert_sampler(struct st_context
*st
,
130 struct pipe_sampler_state
*sampler
,
133 struct gl_texture_object
*texobj
;
134 struct gl_context
*ctx
= st
->ctx
;
135 struct gl_sampler_object
*msamp
;
137 texobj
= ctx
->Texture
.Unit
[texUnit
]._Current
;
139 texobj
= _mesa_get_fallback_texture(ctx
, TEXTURE_2D_INDEX
);
142 msamp
= _mesa_get_samplerobj(ctx
, texUnit
);
144 memset(sampler
, 0, sizeof(*sampler
));
145 sampler
->wrap_s
= gl_wrap_xlate(msamp
->WrapS
);
146 sampler
->wrap_t
= gl_wrap_xlate(msamp
->WrapT
);
147 sampler
->wrap_r
= gl_wrap_xlate(msamp
->WrapR
);
149 sampler
->min_img_filter
= gl_filter_to_img_filter(msamp
->MinFilter
);
150 sampler
->min_mip_filter
= gl_filter_to_mip_filter(msamp
->MinFilter
);
151 sampler
->mag_img_filter
= gl_filter_to_img_filter(msamp
->MagFilter
);
153 if (texobj
->Target
!= GL_TEXTURE_RECTANGLE_ARB
)
154 sampler
->normalized_coords
= 1;
156 sampler
->lod_bias
= ctx
->Texture
.Unit
[texUnit
].LodBias
+ msamp
->LodBias
;
158 sampler
->min_lod
= CLAMP(msamp
->MinLod
,
160 (GLfloat
) texobj
->MaxLevel
- texobj
->BaseLevel
);
161 sampler
->max_lod
= MIN2((GLfloat
) texobj
->MaxLevel
- texobj
->BaseLevel
,
163 if (sampler
->max_lod
< sampler
->min_lod
) {
164 /* The GL spec doesn't seem to specify what to do in this case.
167 float tmp
= sampler
->max_lod
;
168 sampler
->max_lod
= sampler
->min_lod
;
169 sampler
->min_lod
= tmp
;
170 assert(sampler
->min_lod
<= sampler
->max_lod
);
173 if (msamp
->BorderColor
.ui
[0] ||
174 msamp
->BorderColor
.ui
[1] ||
175 msamp
->BorderColor
.ui
[2] ||
176 msamp
->BorderColor
.ui
[3]) {
177 struct st_texture_object
*stobj
= st_texture_object(texobj
);
178 struct gl_texture_image
*teximg
;
179 GLboolean is_integer
= GL_FALSE
;
180 union pipe_color_union border_color
;
182 teximg
= texobj
->Image
[0][texobj
->BaseLevel
];
185 is_integer
= _mesa_is_enum_format_integer(teximg
->InternalFormat
);
188 if (st
->apply_texture_swizzle_to_border_color
&& stobj
->sampler_view
) {
189 const unsigned char swz
[4] =
191 stobj
->sampler_view
->swizzle_r
,
192 stobj
->sampler_view
->swizzle_g
,
193 stobj
->sampler_view
->swizzle_b
,
194 stobj
->sampler_view
->swizzle_a
,
197 st_translate_color(&msamp
->BorderColor
,
199 teximg
? teximg
->_BaseFormat
: GL_RGBA
, is_integer
);
201 util_format_apply_color_swizzle(&sampler
->border_color
,
202 &border_color
, swz
, is_integer
);
204 st_translate_color(&msamp
->BorderColor
,
205 &sampler
->border_color
,
206 teximg
? teximg
->_BaseFormat
: GL_RGBA
, is_integer
);
210 sampler
->max_anisotropy
= (msamp
->MaxAnisotropy
== 1.0 ?
211 0 : (GLuint
) msamp
->MaxAnisotropy
);
213 /* only care about ARB_shadow, not SGI shadow */
214 if (msamp
->CompareMode
== GL_COMPARE_R_TO_TEXTURE
) {
215 sampler
->compare_mode
= PIPE_TEX_COMPARE_R_TO_TEXTURE
;
216 sampler
->compare_func
217 = st_compare_func_to_pipe(msamp
->CompareFunc
);
220 sampler
->seamless_cube_map
=
221 ctx
->Texture
.CubeMapSeamless
|| msamp
->CubeMapSeamless
;
226 * Update the gallium driver's sampler state for fragment, vertex or
227 * geometry shader stage.
230 update_shader_samplers(struct st_context
*st
,
231 unsigned shader_stage
,
232 const struct gl_program
*prog
,
234 struct pipe_sampler_state
*samplers
,
235 unsigned *num_samplers
)
238 GLbitfield samplers_used
;
239 const GLuint old_max
= *num_samplers
;
241 samplers_used
= prog
->SamplersUsed
;
243 if (*num_samplers
== 0 && samplers_used
== 0x0)
248 /* loop over sampler units (aka tex image units) */
249 for (unit
= 0; unit
< max_units
; unit
++, samplers_used
>>= 1) {
250 struct pipe_sampler_state
*sampler
= samplers
+ unit
;
252 if (samplers_used
& 1) {
253 const GLuint texUnit
= prog
->SamplerUnits
[unit
];
255 convert_sampler(st
, sampler
, texUnit
);
257 *num_samplers
= unit
+ 1;
259 cso_single_sampler(st
->cso_context
, shader_stage
, unit
, sampler
);
261 else if (samplers_used
!= 0 || unit
< old_max
) {
262 cso_single_sampler(st
->cso_context
, shader_stage
, unit
, NULL
);
265 /* if we've reset all the old samplers and we have no more new ones */
270 cso_single_sampler_done(st
->cso_context
, shader_stage
);
275 update_samplers(struct st_context
*st
)
277 const struct gl_context
*ctx
= st
->ctx
;
279 update_shader_samplers(st
,
280 PIPE_SHADER_FRAGMENT
,
281 &ctx
->FragmentProgram
._Current
->Base
,
282 ctx
->Const
.MaxTextureImageUnits
,
283 st
->state
.samplers
[PIPE_SHADER_FRAGMENT
],
284 &st
->state
.num_samplers
[PIPE_SHADER_FRAGMENT
]);
286 update_shader_samplers(st
,
288 &ctx
->VertexProgram
._Current
->Base
,
289 ctx
->Const
.MaxVertexTextureImageUnits
,
290 st
->state
.samplers
[PIPE_SHADER_VERTEX
],
291 &st
->state
.num_samplers
[PIPE_SHADER_VERTEX
]);
293 if (ctx
->GeometryProgram
._Current
) {
294 update_shader_samplers(st
,
295 PIPE_SHADER_GEOMETRY
,
296 &ctx
->GeometryProgram
._Current
->Base
,
297 ctx
->Const
.MaxGeometryTextureImageUnits
,
298 st
->state
.samplers
[PIPE_SHADER_GEOMETRY
],
299 &st
->state
.num_samplers
[PIPE_SHADER_GEOMETRY
]);
304 const struct st_tracked_state st_update_sampler
= {
305 "st_update_sampler", /* name */
307 _NEW_TEXTURE
, /* mesa */
310 update_samplers
/* update */