1 /*
2 * Copyright © 2011 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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
21 * IN THE SOFTWARE.
22 */
23
24 #include "brw_context.h"
25 #include "brw_state.h"
26 #include "brw_defines.h"
27 #include "intel_batchbuffer.h"
28
29 #include "main/macros.h"
30 #include "main/samplerobj.h"
31
32 /**
33 * Sets the sampler state for a single unit.
34 */
35 static void
gen7_update_sampler_state(struct brw_context * brw,int unit,int ss_index,struct gen7_sampler_state * sampler)36 gen7_update_sampler_state(struct brw_context *brw, int unit, int ss_index,
37 struct gen7_sampler_state *sampler)
38 {
39 struct intel_context *intel = &brw->intel;
40 struct gl_context *ctx = &intel->ctx;
41 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
42 struct gl_texture_object *texObj = texUnit->_Current;
43 struct gl_sampler_object *gl_sampler = _mesa_get_samplerobj(ctx, unit);
44 bool using_nearest = false;
45
46 /* These don't use samplers at all. */
47 if (texObj->Target == GL_TEXTURE_BUFFER)
48 return;
49
50 switch (gl_sampler->MinFilter) {
51 case GL_NEAREST:
52 sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
53 sampler->ss0.mip_filter = BRW_MIPFILTER_NONE;
54 using_nearest = true;
55 break;
56 case GL_LINEAR:
57 sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
58 sampler->ss0.mip_filter = BRW_MIPFILTER_NONE;
59 break;
60 case GL_NEAREST_MIPMAP_NEAREST:
61 sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
62 sampler->ss0.mip_filter = BRW_MIPFILTER_NEAREST;
63 break;
64 case GL_LINEAR_MIPMAP_NEAREST:
65 sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
66 sampler->ss0.mip_filter = BRW_MIPFILTER_NEAREST;
67 break;
68 case GL_NEAREST_MIPMAP_LINEAR:
69 sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
70 sampler->ss0.mip_filter = BRW_MIPFILTER_LINEAR;
71 break;
72 case GL_LINEAR_MIPMAP_LINEAR:
73 sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
74 sampler->ss0.mip_filter = BRW_MIPFILTER_LINEAR;
75 break;
76 default:
77 break;
78 }
79
80 /* Set Anisotropy: */
81 if (gl_sampler->MaxAnisotropy > 1.0) {
82 sampler->ss0.min_filter = BRW_MAPFILTER_ANISOTROPIC;
83 sampler->ss0.mag_filter = BRW_MAPFILTER_ANISOTROPIC;
84
85 if (gl_sampler->MaxAnisotropy > 2.0) {
86 sampler->ss3.max_aniso = MIN2((gl_sampler->MaxAnisotropy - 2) / 2,
87 BRW_ANISORATIO_16);
88 }
89 }
90 else {
91 switch (gl_sampler->MagFilter) {
92 case GL_NEAREST:
93 sampler->ss0.mag_filter = BRW_MAPFILTER_NEAREST;
94 using_nearest = true;
95 break;
96 case GL_LINEAR:
97 sampler->ss0.mag_filter = BRW_MAPFILTER_LINEAR;
98 break;
99 default:
100 break;
101 }
102 }
103
104 sampler->ss3.r_wrap_mode = translate_wrap_mode(gl_sampler->WrapR,
105 using_nearest);
106 sampler->ss3.s_wrap_mode = translate_wrap_mode(gl_sampler->WrapS,
107 using_nearest);
108 sampler->ss3.t_wrap_mode = translate_wrap_mode(gl_sampler->WrapT,
109 using_nearest);
110
111 /* Cube-maps on 965 and later must use the same wrap mode for all 3
112 * coordinate dimensions. Futher, only CUBE and CLAMP are valid.
113 */
114 if (texObj->Target == GL_TEXTURE_CUBE_MAP) {
115 if (ctx->Texture.CubeMapSeamless &&
116 (gl_sampler->MinFilter != GL_NEAREST ||
117 gl_sampler->MagFilter != GL_NEAREST)) {
118 sampler->ss3.r_wrap_mode = BRW_TEXCOORDMODE_CUBE;
119 sampler->ss3.s_wrap_mode = BRW_TEXCOORDMODE_CUBE;
120 sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_CUBE;
121 } else {
122 sampler->ss3.r_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
123 sampler->ss3.s_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
124 sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
125 }
126 } else if (texObj->Target == GL_TEXTURE_1D) {
127 /* There's a bug in 1D texture sampling - it actually pays
128 * attention to the wrap_t value, though it should not.
129 * Override the wrap_t value here to GL_REPEAT to keep
130 * any nonexistent border pixels from floating in.
131 */
132 sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_WRAP;
133 }
134
135 /* Set shadow function: */
136 if (gl_sampler->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) {
137 /* Shadowing is "enabled" by emitting a particular sampler
138 * message (sample_c). So need to recompile WM program when
139 * shadow comparison is enabled on each/any texture unit.
140 */
141 sampler->ss1.shadow_function =
142 intel_translate_shadow_compare_func(gl_sampler->CompareFunc);
143 }
144
145 /* Set LOD bias: */
146 sampler->ss0.lod_bias = S_FIXED(CLAMP(texUnit->LodBias +
147 gl_sampler->LodBias, -16, 15), 8);
148
149 sampler->ss0.lod_preclamp = 1; /* OpenGL mode */
150 sampler->ss0.default_color_mode = 0; /* OpenGL/DX10 mode */
151
152 /* Set BaseMipLevel, MaxLOD, MinLOD:
153 *
154 * XXX: I don't think that using firstLevel, lastLevel works,
155 * because we always setup the surface state as if firstLevel ==
156 * level zero. Probably have to subtract firstLevel from each of
157 * these:
158 */
159 sampler->ss0.base_level = U_FIXED(0, 1);
160
161 sampler->ss1.max_lod = U_FIXED(CLAMP(gl_sampler->MaxLod, 0, 13), 8);
162 sampler->ss1.min_lod = U_FIXED(CLAMP(gl_sampler->MinLod, 0, 13), 8);
163
164 /* The sampler can handle non-normalized texture rectangle coordinates
165 * natively
166 */
167 if (texObj->Target == GL_TEXTURE_RECTANGLE) {
168 sampler->ss3.non_normalized_coord = 1;
169 }
170
171 upload_default_color(brw, gl_sampler, unit, ss_index);
172
173 sampler->ss2.default_color_pointer = brw->wm.sdc_offset[ss_index] >> 5;
174
175 if (sampler->ss0.min_filter != BRW_MAPFILTER_NEAREST)
176 sampler->ss3.address_round |= BRW_ADDRESS_ROUNDING_ENABLE_U_MIN |
177 BRW_ADDRESS_ROUNDING_ENABLE_V_MIN |
178 BRW_ADDRESS_ROUNDING_ENABLE_R_MIN;
179 if (sampler->ss0.mag_filter != BRW_MAPFILTER_NEAREST)
180 sampler->ss3.address_round |= BRW_ADDRESS_ROUNDING_ENABLE_U_MAG |
181 BRW_ADDRESS_ROUNDING_ENABLE_V_MAG |
182 BRW_ADDRESS_ROUNDING_ENABLE_R_MAG;
183 }
184
185
186 static void
gen7_upload_samplers(struct brw_context * brw)187 gen7_upload_samplers(struct brw_context *brw)
188 {
189 struct gl_context *ctx = &brw->intel.ctx;
190 struct gen7_sampler_state *samplers;
191
192 /* BRW_NEW_VERTEX_PROGRAM and BRW_NEW_FRAGMENT_PROGRAM */
193 struct gl_program *vs = (struct gl_program *) brw->vertex_program;
194 struct gl_program *fs = (struct gl_program *) brw->fragment_program;
195
196 GLbitfield SamplersUsed = vs->SamplersUsed | fs->SamplersUsed;
197
198 brw->sampler.count = _mesa_fls(SamplersUsed);
199
200 if (brw->sampler.count == 0)
201 return;
202
203 samplers = brw_state_batch(brw, AUB_TRACE_SAMPLER_STATE,
204 brw->sampler.count * sizeof(*samplers),
205 32, &brw->sampler.offset);
206 memset(samplers, 0, brw->sampler.count * sizeof(*samplers));
207
208 for (unsigned s = 0; s < brw->sampler.count; s++) {
209 if (SamplersUsed & (1 << s)) {
210 const unsigned unit = (fs->SamplersUsed & (1 << s)) ?
211 fs->SamplerUnits[s] : vs->SamplerUnits[s];
212 if (ctx->Texture.Unit[unit]._ReallyEnabled)
213 gen7_update_sampler_state(brw, unit, s, &samplers[s]);
214 }
215 }
216
217 brw->state.dirty.cache |= CACHE_NEW_SAMPLER;
218 }
219
220 const struct brw_tracked_state gen7_samplers = {
221 .dirty = {
222 .mesa = _NEW_TEXTURE,
223 .brw = BRW_NEW_BATCH |
224 BRW_NEW_VERTEX_PROGRAM |
225 BRW_NEW_FRAGMENT_PROGRAM,
226 .cache = 0
227 },
228 .emit = gen7_upload_samplers,
229 };
230