2 * Copyright © 2011 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 #include "brw_context.h"
25 #include "brw_state.h"
26 #include "brw_defines.h"
27 #include "intel_batchbuffer.h"
28 #include "intel_mipmap_tree.h"
30 #include "main/macros.h"
31 #include "main/samplerobj.h"
34 * Sets the sampler state for a single unit.
37 gen7_update_sampler_state(struct brw_context
*brw
, int unit
, int ss_index
,
38 struct gen7_sampler_state
*sampler
,
41 struct gl_context
*ctx
= &brw
->ctx
;
42 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
43 struct gl_texture_object
*texObj
= texUnit
->_Current
;
44 struct gl_sampler_object
*gl_sampler
= _mesa_get_samplerobj(ctx
, unit
);
45 bool using_nearest
= false;
47 /* These don't use samplers at all. */
48 if (texObj
->Target
== GL_TEXTURE_BUFFER
)
51 switch (gl_sampler
->MinFilter
) {
53 sampler
->ss0
.min_filter
= BRW_MAPFILTER_NEAREST
;
54 sampler
->ss0
.mip_filter
= BRW_MIPFILTER_NONE
;
58 sampler
->ss0
.min_filter
= BRW_MAPFILTER_LINEAR
;
59 sampler
->ss0
.mip_filter
= BRW_MIPFILTER_NONE
;
61 case GL_NEAREST_MIPMAP_NEAREST
:
62 sampler
->ss0
.min_filter
= BRW_MAPFILTER_NEAREST
;
63 sampler
->ss0
.mip_filter
= BRW_MIPFILTER_NEAREST
;
65 case GL_LINEAR_MIPMAP_NEAREST
:
66 sampler
->ss0
.min_filter
= BRW_MAPFILTER_LINEAR
;
67 sampler
->ss0
.mip_filter
= BRW_MIPFILTER_NEAREST
;
69 case GL_NEAREST_MIPMAP_LINEAR
:
70 sampler
->ss0
.min_filter
= BRW_MAPFILTER_NEAREST
;
71 sampler
->ss0
.mip_filter
= BRW_MIPFILTER_LINEAR
;
73 case GL_LINEAR_MIPMAP_LINEAR
:
74 sampler
->ss0
.min_filter
= BRW_MAPFILTER_LINEAR
;
75 sampler
->ss0
.mip_filter
= BRW_MIPFILTER_LINEAR
;
82 if (gl_sampler
->MaxAnisotropy
> 1.0) {
83 sampler
->ss0
.min_filter
= BRW_MAPFILTER_ANISOTROPIC
;
84 sampler
->ss0
.mag_filter
= BRW_MAPFILTER_ANISOTROPIC
;
85 sampler
->ss0
.aniso_algorithm
= 1;
87 if (gl_sampler
->MaxAnisotropy
> 2.0) {
88 sampler
->ss3
.max_aniso
= MIN2((gl_sampler
->MaxAnisotropy
- 2) / 2,
93 switch (gl_sampler
->MagFilter
) {
95 sampler
->ss0
.mag_filter
= BRW_MAPFILTER_NEAREST
;
99 sampler
->ss0
.mag_filter
= BRW_MAPFILTER_LINEAR
;
106 sampler
->ss3
.r_wrap_mode
= translate_wrap_mode(gl_sampler
->WrapR
,
108 sampler
->ss3
.s_wrap_mode
= translate_wrap_mode(gl_sampler
->WrapS
,
110 sampler
->ss3
.t_wrap_mode
= translate_wrap_mode(gl_sampler
->WrapT
,
113 /* Cube-maps on 965 and later must use the same wrap mode for all 3
114 * coordinate dimensions. Futher, only CUBE and CLAMP are valid.
116 if (texObj
->Target
== GL_TEXTURE_CUBE_MAP
||
117 texObj
->Target
== GL_TEXTURE_CUBE_MAP_ARRAY
) {
118 if ((ctx
->Texture
.CubeMapSeamless
|| gl_sampler
->CubeMapSeamless
) &&
119 (gl_sampler
->MinFilter
!= GL_NEAREST
||
120 gl_sampler
->MagFilter
!= GL_NEAREST
)) {
121 sampler
->ss3
.r_wrap_mode
= BRW_TEXCOORDMODE_CUBE
;
122 sampler
->ss3
.s_wrap_mode
= BRW_TEXCOORDMODE_CUBE
;
123 sampler
->ss3
.t_wrap_mode
= BRW_TEXCOORDMODE_CUBE
;
125 sampler
->ss3
.r_wrap_mode
= BRW_TEXCOORDMODE_CLAMP
;
126 sampler
->ss3
.s_wrap_mode
= BRW_TEXCOORDMODE_CLAMP
;
127 sampler
->ss3
.t_wrap_mode
= BRW_TEXCOORDMODE_CLAMP
;
129 } else if (texObj
->Target
== GL_TEXTURE_1D
) {
130 /* There's a bug in 1D texture sampling - it actually pays
131 * attention to the wrap_t value, though it should not.
132 * Override the wrap_t value here to GL_REPEAT to keep
133 * any nonexistent border pixels from floating in.
135 sampler
->ss3
.t_wrap_mode
= BRW_TEXCOORDMODE_WRAP
;
138 /* Set shadow function: */
139 if (gl_sampler
->CompareMode
== GL_COMPARE_R_TO_TEXTURE_ARB
) {
140 /* Shadowing is "enabled" by emitting a particular sampler
141 * message (sample_c). So need to recompile WM program when
142 * shadow comparison is enabled on each/any texture unit.
144 sampler
->ss1
.shadow_function
=
145 intel_translate_shadow_compare_func(gl_sampler
->CompareFunc
);
149 sampler
->ss0
.lod_bias
= S_FIXED(CLAMP(texUnit
->LodBias
+
150 gl_sampler
->LodBias
, -16, 15), 8);
152 sampler
->ss0
.lod_preclamp
= 1; /* OpenGL mode */
153 sampler
->ss0
.default_color_mode
= 0; /* OpenGL/DX10 mode */
155 sampler
->ss0
.base_level
= U_FIXED(0, 1);
157 sampler
->ss1
.max_lod
= U_FIXED(CLAMP(gl_sampler
->MaxLod
, 0, 13), 8);
158 sampler
->ss1
.min_lod
= U_FIXED(CLAMP(gl_sampler
->MinLod
, 0, 13), 8);
160 /* The sampler can handle non-normalized texture rectangle coordinates
163 if (texObj
->Target
== GL_TEXTURE_RECTANGLE
) {
164 sampler
->ss3
.non_normalized_coord
= 1;
167 upload_default_color(brw
, gl_sampler
, unit
, sdc_offset
);
169 sampler
->ss2
.default_color_pointer
= *sdc_offset
>> 5;
171 if (sampler
->ss0
.min_filter
!= BRW_MAPFILTER_NEAREST
)
172 sampler
->ss3
.address_round
|= BRW_ADDRESS_ROUNDING_ENABLE_U_MIN
|
173 BRW_ADDRESS_ROUNDING_ENABLE_V_MIN
|
174 BRW_ADDRESS_ROUNDING_ENABLE_R_MIN
;
175 if (sampler
->ss0
.mag_filter
!= BRW_MAPFILTER_NEAREST
)
176 sampler
->ss3
.address_round
|= BRW_ADDRESS_ROUNDING_ENABLE_U_MAG
|
177 BRW_ADDRESS_ROUNDING_ENABLE_V_MAG
|
178 BRW_ADDRESS_ROUNDING_ENABLE_R_MAG
;
183 gen7_upload_sampler_state_table(struct brw_context
*brw
,
184 struct gl_program
*prog
,
185 struct brw_stage_state
*stage_state
)
187 struct gl_context
*ctx
= &brw
->ctx
;
188 struct gen7_sampler_state
*samplers
;
189 uint32_t sampler_count
= stage_state
->sampler_count
;
191 GLbitfield SamplersUsed
= prog
->SamplersUsed
;
193 if (sampler_count
== 0)
196 samplers
= brw_state_batch(brw
, AUB_TRACE_SAMPLER_STATE
,
197 sampler_count
* sizeof(*samplers
),
198 32, &stage_state
->sampler_offset
);
199 memset(samplers
, 0, sampler_count
* sizeof(*samplers
));
201 for (unsigned s
= 0; s
< sampler_count
; s
++) {
202 if (SamplersUsed
& (1 << s
)) {
203 const unsigned unit
= prog
->SamplerUnits
[s
];
204 if (ctx
->Texture
.Unit
[unit
]._Current
)
205 gen7_update_sampler_state(brw
, unit
, s
, &samplers
[s
],
206 &stage_state
->sdc_offset
[s
]);
210 brw
->state
.dirty
.cache
|= CACHE_NEW_SAMPLER
;
214 gen7_init_vtable_sampler_functions(struct brw_context
*brw
)
216 brw
->vtbl
.upload_sampler_state_table
= gen7_upload_sampler_state_table
;