1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
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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
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18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
29 * Largely a copy of llvmpipe's lp_tex_sample.c
33 * Texture sampling code generation
35 * This file is nothing more than ugly glue between three largely independent
37 * - TGSI -> LLVM translation (i.e., lp_build_tgsi_soa)
38 * - texture sampling code generation (i.e., lp_build_sample_soa)
41 * All interesting code is in the functions mentioned above. There is really
42 * nothing to see here.
44 * @author Jose Fonseca <jfonseca@vmware.com>
48 #include "JitManager.h"
49 #include "state_llvm.h"
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"
60 #include "swr_tex_sample.h"
61 #include "swr_context_llvm.h"
65 * This provides the bridge between the sampler state store in
66 * lp_jit_context and lp_jit_texture and the sampler code
67 * generator. It provides the texture layout information required by
68 * the texture sampler code generator in terms of the state stored in
69 * lp_jit_context and lp_jit_texture in runtime.
71 struct swr_sampler_dynamic_state
{
72 struct lp_sampler_dynamic_state base
;
74 const struct swr_sampler_static_state
*static_state
;
79 * This is the bridge between our sampler and the TGSI translator.
81 struct swr_sampler_soa
{
82 struct lp_build_sampler_soa base
;
84 struct swr_sampler_dynamic_state dynamic_state
;
89 * Fetch the specified member of the lp_jit_texture structure.
90 * \param emit_load if TRUE, emit the LLVM load instruction to actually
91 * fetch the field's value. Otherwise, just emit the
92 * GEP code to address the field.
94 * @sa http://llvm.org/docs/GetElementPtr.html
97 swr_texture_member(const struct lp_sampler_dynamic_state
*base
,
98 struct gallivm_state
*gallivm
,
99 LLVMValueRef context_ptr
,
100 unsigned texture_unit
,
101 unsigned member_index
,
102 const char *member_name
,
105 LLVMBuilderRef builder
= gallivm
->builder
;
106 LLVMValueRef indices
[4];
110 assert(texture_unit
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
113 indices
[0] = lp_build_const_int32(gallivm
, 0);
114 /* context[0].textures */
115 indices
[1] = lp_build_const_int32(gallivm
, swr_draw_context_texturesFS
);
116 /* context[0].textures[unit] */
117 indices
[2] = lp_build_const_int32(gallivm
, texture_unit
);
118 /* context[0].textures[unit].member */
119 indices
[3] = lp_build_const_int32(gallivm
, member_index
);
121 ptr
= LLVMBuildGEP(builder
, context_ptr
, indices
, Elements(indices
), "");
124 res
= LLVMBuildLoad(builder
, ptr
, "");
128 lp_build_name(res
, "context.texture%u.%s", texture_unit
, member_name
);
135 * Helper macro to instantiate the functions that generate the code to
136 * fetch the members of lp_jit_texture to fulfill the sampler code
137 * generator requests.
139 * This complexity is the price we have to pay to keep the texture
140 * sampler code generator a reusable module without dependencies to
143 #define SWR_TEXTURE_MEMBER(_name, _emit_load) \
144 static LLVMValueRef swr_texture_##_name( \
145 const struct lp_sampler_dynamic_state *base, \
146 struct gallivm_state *gallivm, \
147 LLVMValueRef context_ptr, \
148 unsigned texture_unit) \
150 return swr_texture_member(base, \
154 swr_jit_texture_##_name, \
160 SWR_TEXTURE_MEMBER(width
, TRUE
)
161 SWR_TEXTURE_MEMBER(height
, TRUE
)
162 SWR_TEXTURE_MEMBER(depth
, TRUE
)
163 SWR_TEXTURE_MEMBER(first_level
, TRUE
)
164 SWR_TEXTURE_MEMBER(last_level
, TRUE
)
165 SWR_TEXTURE_MEMBER(base_ptr
, TRUE
)
166 SWR_TEXTURE_MEMBER(row_stride
, FALSE
)
167 SWR_TEXTURE_MEMBER(img_stride
, FALSE
)
168 SWR_TEXTURE_MEMBER(mip_offsets
, FALSE
)
172 * Fetch the specified member of the lp_jit_sampler structure.
173 * \param emit_load if TRUE, emit the LLVM load instruction to actually
174 * fetch the field's value. Otherwise, just emit the
175 * GEP code to address the field.
177 * @sa http://llvm.org/docs/GetElementPtr.html
180 swr_sampler_member(const struct lp_sampler_dynamic_state
*base
,
181 struct gallivm_state
*gallivm
,
182 LLVMValueRef context_ptr
,
183 unsigned sampler_unit
,
184 unsigned member_index
,
185 const char *member_name
,
188 LLVMBuilderRef builder
= gallivm
->builder
;
189 LLVMValueRef indices
[4];
193 assert(sampler_unit
< PIPE_MAX_SAMPLERS
);
196 indices
[0] = lp_build_const_int32(gallivm
, 0);
197 /* context[0].samplers */
198 indices
[1] = lp_build_const_int32(gallivm
, swr_draw_context_samplersFS
);
199 /* context[0].samplers[unit] */
200 indices
[2] = lp_build_const_int32(gallivm
, sampler_unit
);
201 /* context[0].samplers[unit].member */
202 indices
[3] = lp_build_const_int32(gallivm
, member_index
);
204 ptr
= LLVMBuildGEP(builder
, context_ptr
, indices
, Elements(indices
), "");
207 res
= LLVMBuildLoad(builder
, ptr
, "");
211 lp_build_name(res
, "context.sampler%u.%s", sampler_unit
, member_name
);
217 #define SWR_SAMPLER_MEMBER(_name, _emit_load) \
218 static LLVMValueRef swr_sampler_##_name( \
219 const struct lp_sampler_dynamic_state *base, \
220 struct gallivm_state *gallivm, \
221 LLVMValueRef context_ptr, \
222 unsigned sampler_unit) \
224 return swr_sampler_member(base, \
228 swr_jit_sampler_##_name, \
234 SWR_SAMPLER_MEMBER(min_lod
, TRUE
)
235 SWR_SAMPLER_MEMBER(max_lod
, TRUE
)
236 SWR_SAMPLER_MEMBER(lod_bias
, TRUE
)
237 SWR_SAMPLER_MEMBER(border_color
, FALSE
)
241 swr_sampler_soa_destroy(struct lp_build_sampler_soa
*sampler
)
248 * Fetch filtered values from texture.
249 * The 'texel' parameter returns four vectors corresponding to R, G, B, A.
252 swr_sampler_soa_emit_fetch_texel(const struct lp_build_sampler_soa
*base
,
253 struct gallivm_state
*gallivm
,
254 const struct lp_sampler_params
*params
)
256 struct swr_sampler_soa
*sampler
= (struct swr_sampler_soa
*)base
;
257 unsigned texture_index
= params
->texture_index
;
258 unsigned sampler_index
= params
->sampler_index
;
260 assert(sampler_index
< PIPE_MAX_SAMPLERS
);
261 assert(texture_index
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
264 lp_build_sample_nop(gallivm
, params
->type
, params
->coords
, params
->texel
);
267 &sampler
->dynamic_state
.static_state
[texture_index
].texture_state
,
268 &sampler
->dynamic_state
.static_state
[sampler_index
].sampler_state
,
269 &sampler
->dynamic_state
.base
,
276 * Fetch the texture size.
279 swr_sampler_soa_emit_size_query(const struct lp_build_sampler_soa
*base
,
280 struct gallivm_state
*gallivm
,
282 unsigned texture_unit
,
284 LLVMValueRef context_ptr
,
285 boolean is_sviewinfo
,
286 enum lp_sampler_lod_property lod_property
,
287 LLVMValueRef explicit_lod
, /* optional */
288 LLVMValueRef
*sizes_out
)
290 struct swr_sampler_soa
*sampler
= (struct swr_sampler_soa
*)base
;
292 assert(texture_unit
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
294 lp_build_size_query_soa(
296 &sampler
->dynamic_state
.static_state
[texture_unit
].texture_state
,
297 &sampler
->dynamic_state
.base
,
309 struct lp_build_sampler_soa
*
310 swr_sampler_soa_create(const struct swr_sampler_static_state
*static_state
)
312 struct swr_sampler_soa
*sampler
;
314 sampler
= CALLOC_STRUCT(swr_sampler_soa
);
318 sampler
->base
.destroy
= swr_sampler_soa_destroy
;
319 sampler
->base
.emit_tex_sample
= swr_sampler_soa_emit_fetch_texel
;
320 sampler
->base
.emit_size_query
= swr_sampler_soa_emit_size_query
;
321 sampler
->dynamic_state
.base
.width
= swr_texture_width
;
322 sampler
->dynamic_state
.base
.height
= swr_texture_height
;
323 sampler
->dynamic_state
.base
.depth
= swr_texture_depth
;
324 sampler
->dynamic_state
.base
.first_level
= swr_texture_first_level
;
325 sampler
->dynamic_state
.base
.last_level
= swr_texture_last_level
;
326 sampler
->dynamic_state
.base
.base_ptr
= swr_texture_base_ptr
;
327 sampler
->dynamic_state
.base
.row_stride
= swr_texture_row_stride
;
328 sampler
->dynamic_state
.base
.img_stride
= swr_texture_img_stride
;
329 sampler
->dynamic_state
.base
.mip_offsets
= swr_texture_mip_offsets
;
330 sampler
->dynamic_state
.base
.min_lod
= swr_sampler_min_lod
;
331 sampler
->dynamic_state
.base
.max_lod
= swr_sampler_max_lod
;
332 sampler
->dynamic_state
.base
.lod_bias
= swr_sampler_lod_bias
;
333 sampler
->dynamic_state
.base
.border_color
= swr_sampler_border_color
;
335 sampler
->dynamic_state
.static_state
= static_state
;
337 return &sampler
->base
;