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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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 **************************************************************************/
29 * Texture sampling code generation
31 * This file is nothing more than ugly glue between three largely independent
33 * - TGSI -> LLVM translation (i.e., lp_build_tgsi_soa)
34 * - texture sampling code generation (i.e., lp_build_sample_soa)
37 * All interesting code is in the functions mentioned above. There is really
38 * nothing to see here.
40 * @author Jose Fonseca <jfonseca@vmware.com>
43 #include "pipe/p_defines.h"
44 #include "pipe/p_shader_tokens.h"
45 #include "gallivm/lp_bld_debug.h"
46 #include "gallivm/lp_bld_const.h"
47 #include "gallivm/lp_bld_type.h"
48 #include "gallivm/lp_bld_sample.h"
49 #include "gallivm/lp_bld_tgsi.h"
51 #include "lp_tex_sample.h"
52 #include "lp_state_fs.h"
57 * This provides the bridge between the sampler state store in
58 * lp_jit_context and lp_jit_texture and the sampler code
59 * generator. It provides the texture layout information required by
60 * the texture sampler code generator in terms of the state stored in
61 * lp_jit_context and lp_jit_texture in runtime.
63 struct llvmpipe_sampler_dynamic_state
65 struct lp_sampler_dynamic_state base
;
67 const struct lp_sampler_static_state
*static_state
;
72 * This is the bridge between our sampler and the TGSI translator.
74 struct lp_llvm_sampler_soa
76 struct lp_build_sampler_soa base
;
78 struct llvmpipe_sampler_dynamic_state dynamic_state
;
83 * Fetch the specified member of the lp_jit_texture structure.
84 * \param emit_load if TRUE, emit the LLVM load instruction to actually
85 * fetch the field's value. Otherwise, just emit the
86 * GEP code to address the field.
88 * @sa http://llvm.org/docs/GetElementPtr.html
91 lp_llvm_texture_member(const struct lp_sampler_dynamic_state
*base
,
92 struct gallivm_state
*gallivm
,
93 LLVMValueRef context_ptr
,
94 unsigned texture_unit
,
95 unsigned member_index
,
96 const char *member_name
,
99 LLVMBuilderRef builder
= gallivm
->builder
;
100 LLVMValueRef indices
[4];
104 assert(texture_unit
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
107 indices
[0] = lp_build_const_int32(gallivm
, 0);
108 /* context[0].textures */
109 indices
[1] = lp_build_const_int32(gallivm
, LP_JIT_CTX_TEXTURES
);
110 /* context[0].textures[unit] */
111 indices
[2] = lp_build_const_int32(gallivm
, texture_unit
);
112 /* context[0].textures[unit].member */
113 indices
[3] = lp_build_const_int32(gallivm
, member_index
);
115 ptr
= LLVMBuildGEP(builder
, context_ptr
, indices
, Elements(indices
), "");
118 res
= LLVMBuildLoad(builder
, ptr
, "");
122 lp_build_name(res
, "context.texture%u.%s", texture_unit
, member_name
);
129 * Helper macro to instantiate the functions that generate the code to
130 * fetch the members of lp_jit_texture to fulfill the sampler code
131 * generator requests.
133 * This complexity is the price we have to pay to keep the texture
134 * sampler code generator a reusable module without dependencies to
135 * llvmpipe internals.
137 #define LP_LLVM_TEXTURE_MEMBER(_name, _index, _emit_load) \
138 static LLVMValueRef \
139 lp_llvm_texture_##_name( const struct lp_sampler_dynamic_state *base, \
140 struct gallivm_state *gallivm, \
141 LLVMValueRef context_ptr, \
142 unsigned texture_unit) \
144 return lp_llvm_texture_member(base, gallivm, context_ptr, \
145 texture_unit, _index, #_name, _emit_load ); \
149 LP_LLVM_TEXTURE_MEMBER(width
, LP_JIT_TEXTURE_WIDTH
, TRUE
)
150 LP_LLVM_TEXTURE_MEMBER(height
, LP_JIT_TEXTURE_HEIGHT
, TRUE
)
151 LP_LLVM_TEXTURE_MEMBER(depth
, LP_JIT_TEXTURE_DEPTH
, TRUE
)
152 LP_LLVM_TEXTURE_MEMBER(first_level
, LP_JIT_TEXTURE_FIRST_LEVEL
, TRUE
)
153 LP_LLVM_TEXTURE_MEMBER(last_level
, LP_JIT_TEXTURE_LAST_LEVEL
, TRUE
)
154 LP_LLVM_TEXTURE_MEMBER(base_ptr
, LP_JIT_TEXTURE_BASE
, TRUE
)
155 LP_LLVM_TEXTURE_MEMBER(row_stride
, LP_JIT_TEXTURE_ROW_STRIDE
, FALSE
)
156 LP_LLVM_TEXTURE_MEMBER(img_stride
, LP_JIT_TEXTURE_IMG_STRIDE
, FALSE
)
157 LP_LLVM_TEXTURE_MEMBER(mip_offsets
, LP_JIT_TEXTURE_MIP_OFFSETS
, FALSE
)
161 * Fetch the specified member of the lp_jit_sampler structure.
162 * \param emit_load if TRUE, emit the LLVM load instruction to actually
163 * fetch the field's value. Otherwise, just emit the
164 * GEP code to address the field.
166 * @sa http://llvm.org/docs/GetElementPtr.html
169 lp_llvm_sampler_member(const struct lp_sampler_dynamic_state
*base
,
170 struct gallivm_state
*gallivm
,
171 LLVMValueRef context_ptr
,
172 unsigned sampler_unit
,
173 unsigned member_index
,
174 const char *member_name
,
177 LLVMBuilderRef builder
= gallivm
->builder
;
178 LLVMValueRef indices
[4];
182 assert(sampler_unit
< PIPE_MAX_SAMPLERS
);
185 indices
[0] = lp_build_const_int32(gallivm
, 0);
186 /* context[0].samplers */
187 indices
[1] = lp_build_const_int32(gallivm
, LP_JIT_CTX_SAMPLERS
);
188 /* context[0].samplers[unit] */
189 indices
[2] = lp_build_const_int32(gallivm
, sampler_unit
);
190 /* context[0].samplers[unit].member */
191 indices
[3] = lp_build_const_int32(gallivm
, member_index
);
193 ptr
= LLVMBuildGEP(builder
, context_ptr
, indices
, Elements(indices
), "");
196 res
= LLVMBuildLoad(builder
, ptr
, "");
200 lp_build_name(res
, "context.sampler%u.%s", sampler_unit
, member_name
);
206 #define LP_LLVM_SAMPLER_MEMBER(_name, _index, _emit_load) \
207 static LLVMValueRef \
208 lp_llvm_sampler_##_name( const struct lp_sampler_dynamic_state *base, \
209 struct gallivm_state *gallivm, \
210 LLVMValueRef context_ptr, \
211 unsigned sampler_unit) \
213 return lp_llvm_sampler_member(base, gallivm, context_ptr, \
214 sampler_unit, _index, #_name, _emit_load ); \
218 LP_LLVM_SAMPLER_MEMBER(min_lod
, LP_JIT_SAMPLER_MIN_LOD
, TRUE
)
219 LP_LLVM_SAMPLER_MEMBER(max_lod
, LP_JIT_SAMPLER_MAX_LOD
, TRUE
)
220 LP_LLVM_SAMPLER_MEMBER(lod_bias
, LP_JIT_SAMPLER_LOD_BIAS
, TRUE
)
221 LP_LLVM_SAMPLER_MEMBER(border_color
, LP_JIT_SAMPLER_BORDER_COLOR
, FALSE
)
225 lp_llvm_sampler_soa_destroy(struct lp_build_sampler_soa
*sampler
)
232 * Fetch filtered values from texture.
233 * The 'texel' parameter returns four vectors corresponding to R, G, B, A.
236 lp_llvm_sampler_soa_emit_fetch_texel(const struct lp_build_sampler_soa
*base
,
237 struct gallivm_state
*gallivm
,
238 const struct lp_sampler_params
*params
)
240 struct lp_llvm_sampler_soa
*sampler
= (struct lp_llvm_sampler_soa
*)base
;
241 unsigned texture_index
= params
->texture_index
;
242 unsigned sampler_index
= params
->sampler_index
;
244 assert(sampler_index
< PIPE_MAX_SAMPLERS
);
245 assert(texture_index
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
247 if (LP_PERF
& PERF_NO_TEX
) {
248 lp_build_sample_nop(gallivm
, params
->type
, params
->coords
, params
->texel
);
252 lp_build_sample_soa(&sampler
->dynamic_state
.static_state
[texture_index
].texture_state
,
253 &sampler
->dynamic_state
.static_state
[sampler_index
].sampler_state
,
254 &sampler
->dynamic_state
.base
,
259 * Fetch the texture size.
262 lp_llvm_sampler_soa_emit_size_query(const struct lp_build_sampler_soa
*base
,
263 struct gallivm_state
*gallivm
,
265 unsigned texture_unit
,
267 LLVMValueRef context_ptr
,
268 boolean is_sviewinfo
,
269 enum lp_sampler_lod_property lod_property
,
270 LLVMValueRef explicit_lod
, /* optional */
271 LLVMValueRef
*sizes_out
)
273 struct lp_llvm_sampler_soa
*sampler
= (struct lp_llvm_sampler_soa
*)base
;
275 assert(texture_unit
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
277 lp_build_size_query_soa(gallivm
,
278 &sampler
->dynamic_state
.static_state
[texture_unit
].texture_state
,
279 &sampler
->dynamic_state
.base
,
291 struct lp_build_sampler_soa
*
292 lp_llvm_sampler_soa_create(const struct lp_sampler_static_state
*static_state
)
294 struct lp_llvm_sampler_soa
*sampler
;
296 sampler
= CALLOC_STRUCT(lp_llvm_sampler_soa
);
300 sampler
->base
.destroy
= lp_llvm_sampler_soa_destroy
;
301 sampler
->base
.emit_tex_sample
= lp_llvm_sampler_soa_emit_fetch_texel
;
302 sampler
->base
.emit_size_query
= lp_llvm_sampler_soa_emit_size_query
;
303 sampler
->dynamic_state
.base
.width
= lp_llvm_texture_width
;
304 sampler
->dynamic_state
.base
.height
= lp_llvm_texture_height
;
305 sampler
->dynamic_state
.base
.depth
= lp_llvm_texture_depth
;
306 sampler
->dynamic_state
.base
.first_level
= lp_llvm_texture_first_level
;
307 sampler
->dynamic_state
.base
.last_level
= lp_llvm_texture_last_level
;
308 sampler
->dynamic_state
.base
.base_ptr
= lp_llvm_texture_base_ptr
;
309 sampler
->dynamic_state
.base
.row_stride
= lp_llvm_texture_row_stride
;
310 sampler
->dynamic_state
.base
.img_stride
= lp_llvm_texture_img_stride
;
311 sampler
->dynamic_state
.base
.mip_offsets
= lp_llvm_texture_mip_offsets
;
312 sampler
->dynamic_state
.base
.min_lod
= lp_llvm_sampler_min_lod
;
313 sampler
->dynamic_state
.base
.max_lod
= lp_llvm_sampler_max_lod
;
314 sampler
->dynamic_state
.base
.lod_bias
= lp_llvm_sampler_lod_bias
;
315 sampler
->dynamic_state
.base
.border_color
= lp_llvm_sampler_border_color
;
317 sampler
->dynamic_state
.static_state
= static_state
;
319 return &sampler
->base
;