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3 * Copyright 2010 VMware, Inc.
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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
30 * @author Jose Fonseca <jfonseca@vmware.com>
33 #include "pipe/p_defines.h"
34 #include "pipe/p_shader_tokens.h"
35 #include "gallivm/lp_bld_const.h"
36 #include "gallivm/lp_bld_debug.h"
37 #include "gallivm/lp_bld_type.h"
38 #include "gallivm/lp_bld_sample.h"
39 #include "gallivm/lp_bld_tgsi.h"
42 #include "util/u_debug.h"
43 #include "util/u_memory.h"
44 #include "util/u_pointer.h"
45 #include "util/u_string.h"
47 #include "draw_llvm.h"
51 * This provides the bridge between the sampler state store in
52 * lp_jit_context and lp_jit_texture and the sampler code
53 * generator. It provides the texture layout information required by
54 * the texture sampler code generator in terms of the state stored in
55 * lp_jit_context and lp_jit_texture in runtime.
57 struct draw_llvm_sampler_dynamic_state
59 struct lp_sampler_dynamic_state base
;
61 const struct draw_sampler_static_state
*static_state
;
63 LLVMValueRef context_ptr
;
68 * This is the bridge between our sampler and the TGSI translator.
70 struct draw_llvm_sampler_soa
72 struct lp_build_sampler_soa base
;
74 struct draw_llvm_sampler_dynamic_state dynamic_state
;
79 * Fetch the specified member of the lp_jit_texture structure.
80 * \param emit_load if TRUE, emit the LLVM load instruction to actually
81 * fetch the field's value. Otherwise, just emit the
82 * GEP code to address the field.
84 * @sa http://llvm.org/docs/GetElementPtr.html
87 draw_llvm_texture_member(const struct lp_sampler_dynamic_state
*base
,
88 struct gallivm_state
*gallivm
,
89 unsigned texture_unit
,
90 unsigned member_index
,
91 const char *member_name
,
94 LLVMBuilderRef builder
= gallivm
->builder
;
95 struct draw_llvm_sampler_dynamic_state
*state
=
96 (struct draw_llvm_sampler_dynamic_state
*)base
;
97 LLVMValueRef indices
[4];
101 debug_assert(texture_unit
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
104 indices
[0] = lp_build_const_int32(gallivm
, 0);
105 /* context[0].textures */
106 indices
[1] = lp_build_const_int32(gallivm
, DRAW_JIT_CTX_TEXTURES
);
107 /* context[0].textures[unit] */
108 indices
[2] = lp_build_const_int32(gallivm
, texture_unit
);
109 /* context[0].textures[unit].member */
110 indices
[3] = lp_build_const_int32(gallivm
, member_index
);
112 ptr
= LLVMBuildGEP(builder
, state
->context_ptr
, indices
, Elements(indices
), "");
115 res
= LLVMBuildLoad(builder
, ptr
, "");
119 lp_build_name(res
, "context.texture%u.%s", texture_unit
, member_name
);
126 * Fetch the specified member of the lp_jit_sampler structure.
127 * \param emit_load if TRUE, emit the LLVM load instruction to actually
128 * fetch the field's value. Otherwise, just emit the
129 * GEP code to address the field.
131 * @sa http://llvm.org/docs/GetElementPtr.html
134 draw_llvm_sampler_member(const struct lp_sampler_dynamic_state
*base
,
135 struct gallivm_state
*gallivm
,
136 unsigned sampler_unit
,
137 unsigned member_index
,
138 const char *member_name
,
141 LLVMBuilderRef builder
= gallivm
->builder
;
142 struct draw_llvm_sampler_dynamic_state
*state
=
143 (struct draw_llvm_sampler_dynamic_state
*)base
;
144 LLVMValueRef indices
[4];
148 debug_assert(sampler_unit
< PIPE_MAX_SAMPLERS
);
151 indices
[0] = lp_build_const_int32(gallivm
, 0);
152 /* context[0].samplers */
153 indices
[1] = lp_build_const_int32(gallivm
, DRAW_JIT_CTX_SAMPLERS
);
154 /* context[0].samplers[unit] */
155 indices
[2] = lp_build_const_int32(gallivm
, sampler_unit
);
156 /* context[0].samplers[unit].member */
157 indices
[3] = lp_build_const_int32(gallivm
, member_index
);
159 ptr
= LLVMBuildGEP(builder
, state
->context_ptr
, indices
, Elements(indices
), "");
162 res
= LLVMBuildLoad(builder
, ptr
, "");
166 lp_build_name(res
, "context.sampler%u.%s", sampler_unit
, member_name
);
173 * Helper macro to instantiate the functions that generate the code to
174 * fetch the members of lp_jit_texture to fulfill the sampler code
175 * generator requests.
177 * This complexity is the price we have to pay to keep the texture
178 * sampler code generator a reusable module without dependencies to
179 * llvmpipe internals.
181 #define DRAW_LLVM_TEXTURE_MEMBER(_name, _index, _emit_load) \
182 static LLVMValueRef \
183 draw_llvm_texture_##_name( const struct lp_sampler_dynamic_state *base, \
184 struct gallivm_state *gallivm, \
185 unsigned texture_unit) \
187 return draw_llvm_texture_member(base, gallivm, texture_unit, _index, #_name, _emit_load ); \
191 DRAW_LLVM_TEXTURE_MEMBER(width
, DRAW_JIT_TEXTURE_WIDTH
, TRUE
)
192 DRAW_LLVM_TEXTURE_MEMBER(height
, DRAW_JIT_TEXTURE_HEIGHT
, TRUE
)
193 DRAW_LLVM_TEXTURE_MEMBER(depth
, DRAW_JIT_TEXTURE_DEPTH
, TRUE
)
194 DRAW_LLVM_TEXTURE_MEMBER(first_level
,DRAW_JIT_TEXTURE_FIRST_LEVEL
, TRUE
)
195 DRAW_LLVM_TEXTURE_MEMBER(last_level
, DRAW_JIT_TEXTURE_LAST_LEVEL
, TRUE
)
196 DRAW_LLVM_TEXTURE_MEMBER(base_ptr
, DRAW_JIT_TEXTURE_BASE
, TRUE
)
197 DRAW_LLVM_TEXTURE_MEMBER(row_stride
, DRAW_JIT_TEXTURE_ROW_STRIDE
, FALSE
)
198 DRAW_LLVM_TEXTURE_MEMBER(img_stride
, DRAW_JIT_TEXTURE_IMG_STRIDE
, FALSE
)
199 DRAW_LLVM_TEXTURE_MEMBER(mip_offsets
, DRAW_JIT_TEXTURE_MIP_OFFSETS
, FALSE
)
202 #define DRAW_LLVM_SAMPLER_MEMBER(_name, _index, _emit_load) \
203 static LLVMValueRef \
204 draw_llvm_sampler_##_name( const struct lp_sampler_dynamic_state *base, \
205 struct gallivm_state *gallivm, \
206 unsigned sampler_unit) \
208 return draw_llvm_sampler_member(base, gallivm, sampler_unit, _index, #_name, _emit_load ); \
212 DRAW_LLVM_SAMPLER_MEMBER(min_lod
, DRAW_JIT_SAMPLER_MIN_LOD
, TRUE
)
213 DRAW_LLVM_SAMPLER_MEMBER(max_lod
, DRAW_JIT_SAMPLER_MAX_LOD
, TRUE
)
214 DRAW_LLVM_SAMPLER_MEMBER(lod_bias
, DRAW_JIT_SAMPLER_LOD_BIAS
, TRUE
)
215 DRAW_LLVM_SAMPLER_MEMBER(border_color
, DRAW_JIT_SAMPLER_BORDER_COLOR
, FALSE
)
219 draw_llvm_sampler_soa_destroy(struct lp_build_sampler_soa
*sampler
)
226 * Fetch filtered values from texture.
227 * The 'texel' parameter returns four vectors corresponding to R, G, B, A.
230 draw_llvm_sampler_soa_emit_fetch_texel(const struct lp_build_sampler_soa
*base
,
231 struct gallivm_state
*gallivm
,
234 unsigned texture_index
,
235 unsigned sampler_index
,
236 const LLVMValueRef
*coords
,
237 const LLVMValueRef
*offsets
,
238 const struct lp_derivatives
*derivs
,
239 LLVMValueRef lod_bias
, /* optional */
240 LLVMValueRef explicit_lod
, /* optional */
244 struct draw_llvm_sampler_soa
*sampler
= (struct draw_llvm_sampler_soa
*)base
;
246 assert(texture_index
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
247 assert(sampler_index
< PIPE_MAX_SAMPLERS
);
249 lp_build_sample_soa(gallivm
,
250 &sampler
->dynamic_state
.static_state
[texture_index
].texture_state
,
251 &sampler
->dynamic_state
.static_state
[sampler_index
].sampler_state
,
252 &sampler
->dynamic_state
.base
,
260 lod_bias
, explicit_lod
, scalar_lod
,
266 * Fetch the texture size.
269 draw_llvm_sampler_soa_emit_size_query(const struct lp_build_sampler_soa
*base
,
270 struct gallivm_state
*gallivm
,
272 unsigned texture_unit
,
273 boolean need_nr_mips
,
274 LLVMValueRef explicit_lod
, /* optional */
275 LLVMValueRef
*sizes_out
)
277 struct draw_llvm_sampler_soa
*sampler
= (struct draw_llvm_sampler_soa
*)base
;
279 assert(texture_unit
< PIPE_MAX_SHADER_SAMPLER_VIEWS
);
281 lp_build_size_query_soa(gallivm
,
282 &sampler
->dynamic_state
.static_state
[texture_unit
].texture_state
,
283 &sampler
->dynamic_state
.base
,
291 struct lp_build_sampler_soa
*
292 draw_llvm_sampler_soa_create(const struct draw_sampler_static_state
*static_state
,
293 LLVMValueRef context_ptr
)
295 struct draw_llvm_sampler_soa
*sampler
;
297 sampler
= CALLOC_STRUCT(draw_llvm_sampler_soa
);
301 sampler
->base
.destroy
= draw_llvm_sampler_soa_destroy
;
302 sampler
->base
.emit_fetch_texel
= draw_llvm_sampler_soa_emit_fetch_texel
;
303 sampler
->base
.emit_size_query
= draw_llvm_sampler_soa_emit_size_query
;
304 sampler
->dynamic_state
.base
.width
= draw_llvm_texture_width
;
305 sampler
->dynamic_state
.base
.height
= draw_llvm_texture_height
;
306 sampler
->dynamic_state
.base
.depth
= draw_llvm_texture_depth
;
307 sampler
->dynamic_state
.base
.first_level
= draw_llvm_texture_first_level
;
308 sampler
->dynamic_state
.base
.last_level
= draw_llvm_texture_last_level
;
309 sampler
->dynamic_state
.base
.row_stride
= draw_llvm_texture_row_stride
;
310 sampler
->dynamic_state
.base
.img_stride
= draw_llvm_texture_img_stride
;
311 sampler
->dynamic_state
.base
.base_ptr
= draw_llvm_texture_base_ptr
;
312 sampler
->dynamic_state
.base
.mip_offsets
= draw_llvm_texture_mip_offsets
;
313 sampler
->dynamic_state
.base
.min_lod
= draw_llvm_sampler_min_lod
;
314 sampler
->dynamic_state
.base
.max_lod
= draw_llvm_sampler_max_lod
;
315 sampler
->dynamic_state
.base
.lod_bias
= draw_llvm_sampler_lod_bias
;
316 sampler
->dynamic_state
.base
.border_color
= draw_llvm_sampler_border_color
;
317 sampler
->dynamic_state
.static_state
= static_state
;
318 sampler
->dynamic_state
.context_ptr
= context_ptr
;
320 return &sampler
->base
;