1 /**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * All rights reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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 VMWARE 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.
25 *
26 **************************************************************************/
27
28 /**
29 * Largely a copy of llvmpipe's lp_tex_sample.c
30 */
31
32 /**
33 * Texture sampling code generation
34 *
35 * This file is nothing more than ugly glue between three largely independent
36 * entities:
37 * - TGSI -> LLVM translation (i.e., lp_build_tgsi_soa)
38 * - texture sampling code generation (i.e., lp_build_sample_soa)
39 * - SWR driver
40 *
41 * All interesting code is in the functions mentioned above. There is really
42 * nothing to see here.
43 *
44 * @author Jose Fonseca <jfonseca@vmware.com>
45 */
46
47 #include "state.h"
48 #include "JitManager.h"
49 #include "state_llvm.h"
50
51 #include "pipe/p_defines.h"
52 #include "pipe/p_shader_tokens.h"
53 #include "gallivm/lp_bld_debug.h"
54 #include "gallivm/lp_bld_const.h"
55 #include "gallivm/lp_bld_type.h"
56 #include "gallivm/lp_bld_sample.h"
57 #include "gallivm/lp_bld_tgsi.h"
58 #include "util/u_memory.h"
59
60 #include "swr_tex_sample.h"
61 #include "swr_context_llvm.h"
62
63 using namespace SwrJit;
64
65 /**
66 * This provides the bridge between the sampler state store in
67 * lp_jit_context and lp_jit_texture and the sampler code
68 * generator. It provides the texture layout information required by
69 * the texture sampler code generator in terms of the state stored in
70 * lp_jit_context and lp_jit_texture in runtime.
71 */
72 struct swr_sampler_dynamic_state {
73 struct lp_sampler_dynamic_state base;
74
75 const struct swr_sampler_static_state *static_state;
76
77 unsigned shader_type;
78 };
79
80
81 /**
82 * This is the bridge between our sampler and the TGSI translator.
83 */
84 struct swr_sampler_soa {
85 struct lp_build_sampler_soa base;
86
87 struct swr_sampler_dynamic_state dynamic_state;
88 };
89
90
91 /**
92 * Fetch the specified member of the lp_jit_texture structure.
93 * \param emit_load if TRUE, emit the LLVM load instruction to actually
94 * fetch the field's value. Otherwise, just emit the
95 * GEP code to address the field.
96 *
97 * @sa http://llvm.org/docs/GetElementPtr.html
98 */
99 static LLVMValueRef
swr_texture_member(const struct lp_sampler_dynamic_state * base,struct gallivm_state * gallivm,LLVMValueRef context_ptr,unsigned texture_unit,unsigned member_index,const char * member_name,boolean emit_load)100 swr_texture_member(const struct lp_sampler_dynamic_state *base,
101 struct gallivm_state *gallivm,
102 LLVMValueRef context_ptr,
103 unsigned texture_unit,
104 unsigned member_index,
105 const char *member_name,
106 boolean emit_load)
107 {
108 LLVMBuilderRef builder = gallivm->builder;
109 LLVMValueRef indices[4];
110 LLVMValueRef ptr;
111 LLVMValueRef res;
112
113 assert(texture_unit < PIPE_MAX_SHADER_SAMPLER_VIEWS);
114
115 /* context[0] */
116 indices[0] = lp_build_const_int32(gallivm, 0);
117 /* context[0].textures */
118 auto dynamic = (const struct swr_sampler_dynamic_state *)base;
119 switch (dynamic->shader_type) {
120 case PIPE_SHADER_FRAGMENT:
121 indices[1] = lp_build_const_int32(gallivm, swr_draw_context_texturesFS);
122 break;
123 case PIPE_SHADER_VERTEX:
124 indices[1] = lp_build_const_int32(gallivm, swr_draw_context_texturesVS);
125 break;
126 default:
127 assert(0 && "unsupported shader type");
128 break;
129 }
130 /* context[0].textures[unit] */
131 indices[2] = lp_build_const_int32(gallivm, texture_unit);
132 /* context[0].textures[unit].member */
133 indices[3] = lp_build_const_int32(gallivm, member_index);
134
135 ptr = LLVMBuildGEP(builder, context_ptr, indices, ARRAY_SIZE(indices), "");
136
137 if (emit_load)
138 res = LLVMBuildLoad(builder, ptr, "");
139 else
140 res = ptr;
141
142 lp_build_name(res, "context.texture%u.%s", texture_unit, member_name);
143
144 return res;
145 }
146
147
148 /**
149 * Helper macro to instantiate the functions that generate the code to
150 * fetch the members of lp_jit_texture to fulfill the sampler code
151 * generator requests.
152 *
153 * This complexity is the price we have to pay to keep the texture
154 * sampler code generator a reusable module without dependencies to
155 * swr internals.
156 */
157 #define SWR_TEXTURE_MEMBER(_name, _emit_load) \
158 static LLVMValueRef swr_texture_##_name( \
159 const struct lp_sampler_dynamic_state *base, \
160 struct gallivm_state *gallivm, \
161 LLVMValueRef context_ptr, \
162 unsigned texture_unit) \
163 { \
164 return swr_texture_member(base, \
165 gallivm, \
166 context_ptr, \
167 texture_unit, \
168 swr_jit_texture_##_name, \
169 #_name, \
170 _emit_load); \
171 }
172
173
SWR_TEXTURE_MEMBER(width,TRUE)174 SWR_TEXTURE_MEMBER(width, TRUE)
175 SWR_TEXTURE_MEMBER(height, TRUE)
176 SWR_TEXTURE_MEMBER(depth, TRUE)
177 SWR_TEXTURE_MEMBER(first_level, TRUE)
178 SWR_TEXTURE_MEMBER(last_level, TRUE)
179 SWR_TEXTURE_MEMBER(base_ptr, TRUE)
180 SWR_TEXTURE_MEMBER(row_stride, FALSE)
181 SWR_TEXTURE_MEMBER(img_stride, FALSE)
182 SWR_TEXTURE_MEMBER(mip_offsets, FALSE)
183
184
185 /**
186 * Fetch the specified member of the lp_jit_sampler structure.
187 * \param emit_load if TRUE, emit the LLVM load instruction to actually
188 * fetch the field's value. Otherwise, just emit the
189 * GEP code to address the field.
190 *
191 * @sa http://llvm.org/docs/GetElementPtr.html
192 */
193 static LLVMValueRef
194 swr_sampler_member(const struct lp_sampler_dynamic_state *base,
195 struct gallivm_state *gallivm,
196 LLVMValueRef context_ptr,
197 unsigned sampler_unit,
198 unsigned member_index,
199 const char *member_name,
200 boolean emit_load)
201 {
202 LLVMBuilderRef builder = gallivm->builder;
203 LLVMValueRef indices[4];
204 LLVMValueRef ptr;
205 LLVMValueRef res;
206
207 assert(sampler_unit < PIPE_MAX_SAMPLERS);
208
209 /* context[0] */
210 indices[0] = lp_build_const_int32(gallivm, 0);
211 /* context[0].samplers */
212 auto dynamic = (const struct swr_sampler_dynamic_state *)base;
213 switch (dynamic->shader_type) {
214 case PIPE_SHADER_FRAGMENT:
215 indices[1] = lp_build_const_int32(gallivm, swr_draw_context_samplersFS);
216 break;
217 case PIPE_SHADER_VERTEX:
218 indices[1] = lp_build_const_int32(gallivm, swr_draw_context_samplersVS);
219 break;
220 default:
221 assert(0 && "unsupported shader type");
222 break;
223 }
224 /* context[0].samplers[unit] */
225 indices[2] = lp_build_const_int32(gallivm, sampler_unit);
226 /* context[0].samplers[unit].member */
227 indices[3] = lp_build_const_int32(gallivm, member_index);
228
229 ptr = LLVMBuildGEP(builder, context_ptr, indices, ARRAY_SIZE(indices), "");
230
231 if (emit_load)
232 res = LLVMBuildLoad(builder, ptr, "");
233 else
234 res = ptr;
235
236 lp_build_name(res, "context.sampler%u.%s", sampler_unit, member_name);
237
238 return res;
239 }
240
241
242 #define SWR_SAMPLER_MEMBER(_name, _emit_load) \
243 static LLVMValueRef swr_sampler_##_name( \
244 const struct lp_sampler_dynamic_state *base, \
245 struct gallivm_state *gallivm, \
246 LLVMValueRef context_ptr, \
247 unsigned sampler_unit) \
248 { \
249 return swr_sampler_member(base, \
250 gallivm, \
251 context_ptr, \
252 sampler_unit, \
253 swr_jit_sampler_##_name, \
254 #_name, \
255 _emit_load); \
256 }
257
258
SWR_SAMPLER_MEMBER(min_lod,TRUE)259 SWR_SAMPLER_MEMBER(min_lod, TRUE)
260 SWR_SAMPLER_MEMBER(max_lod, TRUE)
261 SWR_SAMPLER_MEMBER(lod_bias, TRUE)
262 SWR_SAMPLER_MEMBER(border_color, FALSE)
263
264
265 static void
266 swr_sampler_soa_destroy(struct lp_build_sampler_soa *sampler)
267 {
268 FREE(sampler);
269 }
270
271
272 /**
273 * Fetch filtered values from texture.
274 * The 'texel' parameter returns four vectors corresponding to R, G, B, A.
275 */
276 static void
swr_sampler_soa_emit_fetch_texel(const struct lp_build_sampler_soa * base,struct gallivm_state * gallivm,const struct lp_sampler_params * params)277 swr_sampler_soa_emit_fetch_texel(const struct lp_build_sampler_soa *base,
278 struct gallivm_state *gallivm,
279 const struct lp_sampler_params *params)
280 {
281 struct swr_sampler_soa *sampler = (struct swr_sampler_soa *)base;
282 unsigned texture_index = params->texture_index;
283 unsigned sampler_index = params->sampler_index;
284
285 assert(sampler_index < PIPE_MAX_SAMPLERS);
286 assert(texture_index < PIPE_MAX_SHADER_SAMPLER_VIEWS);
287
288 #if 0
289 lp_build_sample_nop(gallivm, params->type, params->coords, params->texel);
290 #else
291 lp_build_sample_soa(
292 &sampler->dynamic_state.static_state[texture_index].texture_state,
293 &sampler->dynamic_state.static_state[sampler_index].sampler_state,
294 &sampler->dynamic_state.base,
295 gallivm,
296 params);
297 #endif
298 }
299
300 /**
301 * Fetch the texture size.
302 */
303 static void
swr_sampler_soa_emit_size_query(const struct lp_build_sampler_soa * base,struct gallivm_state * gallivm,const struct lp_sampler_size_query_params * params)304 swr_sampler_soa_emit_size_query(const struct lp_build_sampler_soa *base,
305 struct gallivm_state *gallivm,
306 const struct lp_sampler_size_query_params *params)
307 {
308 struct swr_sampler_soa *sampler = (struct swr_sampler_soa *)base;
309
310 assert(params->texture_unit < PIPE_MAX_SHADER_SAMPLER_VIEWS);
311
312 lp_build_size_query_soa(
313 gallivm,
314 &sampler->dynamic_state.static_state[params->texture_unit].texture_state,
315 &sampler->dynamic_state.base,
316 params);
317 }
318
319
320 struct lp_build_sampler_soa *
swr_sampler_soa_create(const struct swr_sampler_static_state * static_state,unsigned shader_type)321 swr_sampler_soa_create(const struct swr_sampler_static_state *static_state,
322 unsigned shader_type)
323 {
324 struct swr_sampler_soa *sampler;
325
326 sampler = CALLOC_STRUCT(swr_sampler_soa);
327 if (!sampler)
328 return NULL;
329
330 sampler->base.destroy = swr_sampler_soa_destroy;
331 sampler->base.emit_tex_sample = swr_sampler_soa_emit_fetch_texel;
332 sampler->base.emit_size_query = swr_sampler_soa_emit_size_query;
333 sampler->dynamic_state.base.width = swr_texture_width;
334 sampler->dynamic_state.base.height = swr_texture_height;
335 sampler->dynamic_state.base.depth = swr_texture_depth;
336 sampler->dynamic_state.base.first_level = swr_texture_first_level;
337 sampler->dynamic_state.base.last_level = swr_texture_last_level;
338 sampler->dynamic_state.base.base_ptr = swr_texture_base_ptr;
339 sampler->dynamic_state.base.row_stride = swr_texture_row_stride;
340 sampler->dynamic_state.base.img_stride = swr_texture_img_stride;
341 sampler->dynamic_state.base.mip_offsets = swr_texture_mip_offsets;
342 sampler->dynamic_state.base.min_lod = swr_sampler_min_lod;
343 sampler->dynamic_state.base.max_lod = swr_sampler_max_lod;
344 sampler->dynamic_state.base.lod_bias = swr_sampler_lod_bias;
345 sampler->dynamic_state.base.border_color = swr_sampler_border_color;
346
347 sampler->dynamic_state.static_state = static_state;
348
349 sampler->dynamic_state.shader_type = shader_type;
350
351 return &sampler->base;
352 }
353