lp_bld_sample.h revision 34c11c87e4e3b5639764abee413c45e918749477
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 * @file 30 * Texture sampling. 31 * 32 * @author Jose Fonseca <jfonseca@vmware.com> 33 */ 34 35#ifndef LP_BLD_SAMPLE_H 36#define LP_BLD_SAMPLE_H 37 38 39#include "pipe/p_format.h" 40#include "util/u_debug.h" 41#include "gallivm/lp_bld.h" 42#include "gallivm/lp_bld_type.h" 43#include "gallivm/lp_bld_swizzle.h" 44 45 46struct pipe_resource; 47struct pipe_sampler_view; 48struct pipe_sampler_state; 49struct util_format_description; 50struct lp_type; 51struct lp_build_context; 52 53 54/** 55 * Sampler static state. 56 * 57 * These are the bits of state from pipe_resource and pipe_sampler_state that 58 * are embedded in the generated code. 59 */ 60struct lp_sampler_static_state 61{ 62 /* pipe_sampler_view's state */ 63 enum pipe_format format; 64 unsigned swizzle_r:3; /**< PIPE_SWIZZLE_* */ 65 unsigned swizzle_g:3; 66 unsigned swizzle_b:3; 67 unsigned swizzle_a:3; 68 69 /* pipe_texture's state */ 70 unsigned target:3; /**< PIPE_TEXTURE_* */ 71 unsigned pot_width:1; /**< is the width a power of two? */ 72 unsigned pot_height:1; 73 unsigned pot_depth:1; 74 75 /* pipe_sampler_state's state */ 76 unsigned wrap_s:3; 77 unsigned wrap_t:3; 78 unsigned wrap_r:3; 79 unsigned min_img_filter:2; 80 unsigned min_mip_filter:2; 81 unsigned mag_img_filter:2; 82 unsigned compare_mode:1; 83 unsigned compare_func:3; 84 unsigned normalized_coords:1; 85 unsigned min_max_lod_equal:1; /**< min_lod == max_lod ? */ 86 unsigned lod_bias_non_zero:1; 87 unsigned apply_min_lod:1; /**< min_lod > 0 ? */ 88 unsigned apply_max_lod:1; /**< max_lod < last_level ? */ 89}; 90 91 92/** 93 * Sampler dynamic state. 94 * 95 * These are the bits of state from pipe_resource and pipe_sampler_state that 96 * are computed in runtime. 97 * 98 * There are obtained through callbacks, as we don't want to tie the texture 99 * sampling code generation logic to any particular texture layout or pipe 100 * driver. 101 */ 102struct lp_sampler_dynamic_state 103{ 104 105 /** Obtain the base texture width (returns int32) */ 106 LLVMValueRef 107 (*width)( const struct lp_sampler_dynamic_state *state, 108 LLVMBuilderRef builder, 109 unsigned unit); 110 111 /** Obtain the base texture height (returns int32) */ 112 LLVMValueRef 113 (*height)( const struct lp_sampler_dynamic_state *state, 114 LLVMBuilderRef builder, 115 unsigned unit); 116 117 /** Obtain the base texture depth (returns int32) */ 118 LLVMValueRef 119 (*depth)( const struct lp_sampler_dynamic_state *state, 120 LLVMBuilderRef builder, 121 unsigned unit); 122 123 /** Obtain the number of mipmap levels minus one (returns int32) */ 124 LLVMValueRef 125 (*last_level)( const struct lp_sampler_dynamic_state *state, 126 LLVMBuilderRef builder, 127 unsigned unit); 128 129 /** Obtain stride in bytes between image rows/blocks (returns int32) */ 130 LLVMValueRef 131 (*row_stride)( const struct lp_sampler_dynamic_state *state, 132 LLVMBuilderRef builder, 133 unsigned unit); 134 135 /** Obtain stride in bytes between image slices (returns int32) */ 136 LLVMValueRef 137 (*img_stride)( const struct lp_sampler_dynamic_state *state, 138 LLVMBuilderRef builder, 139 unsigned unit); 140 141 /** Obtain pointer to array of pointers to mimpap levels */ 142 LLVMValueRef 143 (*data_ptr)( const struct lp_sampler_dynamic_state *state, 144 LLVMBuilderRef builder, 145 unsigned unit); 146 147 /** Obtain texture min lod (returns float) */ 148 LLVMValueRef 149 (*min_lod)(const struct lp_sampler_dynamic_state *state, 150 LLVMBuilderRef builder, unsigned unit); 151 152 /** Obtain texture max lod (returns float) */ 153 LLVMValueRef 154 (*max_lod)(const struct lp_sampler_dynamic_state *state, 155 LLVMBuilderRef builder, unsigned unit); 156 157 /** Obtain texture lod bias (returns float) */ 158 LLVMValueRef 159 (*lod_bias)(const struct lp_sampler_dynamic_state *state, 160 LLVMBuilderRef builder, unsigned unit); 161 162 /** Obtain texture border color (returns ptr to float[4]) */ 163 LLVMValueRef 164 (*border_color)(const struct lp_sampler_dynamic_state *state, 165 LLVMBuilderRef builder, unsigned unit); 166}; 167 168 169/** 170 * Keep all information for sampling code generation in a single place. 171 */ 172struct lp_build_sample_context 173{ 174 LLVMBuilderRef builder; 175 176 const struct lp_sampler_static_state *static_state; 177 178 struct lp_sampler_dynamic_state *dynamic_state; 179 180 const struct util_format_description *format_desc; 181 182 /* See texture_dims() */ 183 unsigned dims; 184 185 /** regular scalar float type */ 186 struct lp_type float_type; 187 struct lp_build_context float_bld; 188 189 /** float vector type */ 190 struct lp_build_context float_vec_bld; 191 192 /** regular scalar float type */ 193 struct lp_type int_type; 194 struct lp_build_context int_bld; 195 196 /** Incoming coordinates type and build context */ 197 struct lp_type coord_type; 198 struct lp_build_context coord_bld; 199 200 /** Unsigned integer coordinates */ 201 struct lp_type uint_coord_type; 202 struct lp_build_context uint_coord_bld; 203 204 /** Signed integer coordinates */ 205 struct lp_type int_coord_type; 206 struct lp_build_context int_coord_bld; 207 208 /** Unsigned integer texture size */ 209 struct lp_type int_size_type; 210 struct lp_build_context int_size_bld; 211 212 /** Unsigned integer texture size */ 213 struct lp_type float_size_type; 214 struct lp_build_context float_size_bld; 215 216 /** Output texels type and build context */ 217 struct lp_type texel_type; 218 struct lp_build_context texel_bld; 219 220 /* Common dynamic state values */ 221 LLVMValueRef width; 222 LLVMValueRef height; 223 LLVMValueRef depth; 224 LLVMValueRef row_stride_array; 225 LLVMValueRef img_stride_array; 226 LLVMValueRef data_array; 227 228 /** Integer vector with texture width, height, depth */ 229 LLVMValueRef int_size; 230}; 231 232 233 234/** 235 * We only support a few wrap modes in lp_build_sample_wrap_linear_int() at 236 * this time. Return whether the given mode is supported by that function. 237 */ 238static INLINE boolean 239lp_is_simple_wrap_mode(unsigned mode) 240{ 241 switch (mode) { 242 case PIPE_TEX_WRAP_REPEAT: 243 case PIPE_TEX_WRAP_CLAMP_TO_EDGE: 244 return TRUE; 245 default: 246 return FALSE; 247 } 248} 249 250 251static INLINE void 252apply_sampler_swizzle(struct lp_build_sample_context *bld, 253 LLVMValueRef *texel) 254{ 255 unsigned char swizzles[4]; 256 257 swizzles[0] = bld->static_state->swizzle_r; 258 swizzles[1] = bld->static_state->swizzle_g; 259 swizzles[2] = bld->static_state->swizzle_b; 260 swizzles[3] = bld->static_state->swizzle_a; 261 262 lp_build_swizzle_soa_inplace(&bld->texel_bld, texel, swizzles); 263} 264 265 266static INLINE unsigned 267texture_dims(enum pipe_texture_target tex) 268{ 269 switch (tex) { 270 case PIPE_TEXTURE_1D: 271 return 1; 272 case PIPE_TEXTURE_2D: 273 case PIPE_TEXTURE_RECT: 274 case PIPE_TEXTURE_CUBE: 275 return 2; 276 case PIPE_TEXTURE_3D: 277 return 3; 278 default: 279 assert(0 && "bad texture target in texture_dims()"); 280 return 2; 281 } 282} 283 284 285boolean 286lp_sampler_wrap_mode_uses_border_color(unsigned mode, 287 unsigned min_img_filter, 288 unsigned mag_img_filter); 289 290/** 291 * Derive the sampler static state. 292 */ 293void 294lp_sampler_static_state(struct lp_sampler_static_state *state, 295 const struct pipe_sampler_view *view, 296 const struct pipe_sampler_state *sampler); 297 298 299void 300lp_build_lod_selector(struct lp_build_sample_context *bld, 301 unsigned unit, 302 const LLVMValueRef ddx[4], 303 const LLVMValueRef ddy[4], 304 LLVMValueRef lod_bias, /* optional */ 305 LLVMValueRef explicit_lod, /* optional */ 306 unsigned mip_filter, 307 LLVMValueRef *out_lod_ipart, 308 LLVMValueRef *out_lod_fpart); 309 310void 311lp_build_nearest_mip_level(struct lp_build_sample_context *bld, 312 unsigned unit, 313 LLVMValueRef lod, 314 LLVMValueRef *level_out); 315 316void 317lp_build_linear_mip_levels(struct lp_build_sample_context *bld, 318 unsigned unit, 319 LLVMValueRef lod_ipart, 320 LLVMValueRef *lod_fpart_inout, 321 LLVMValueRef *level0_out, 322 LLVMValueRef *level1_out); 323 324LLVMValueRef 325lp_build_get_mipmap_level(struct lp_build_sample_context *bld, 326 LLVMValueRef level); 327 328LLVMValueRef 329lp_build_get_const_mipmap_level(struct lp_build_sample_context *bld, 330 int level); 331 332 333void 334lp_build_mipmap_level_sizes(struct lp_build_sample_context *bld, 335 LLVMValueRef ilevel, 336 LLVMValueRef *out_size_vec, 337 LLVMValueRef *row_stride_vec, 338 LLVMValueRef *img_stride_vec); 339 340 341void 342lp_build_extract_image_sizes(struct lp_build_sample_context *bld, 343 struct lp_type size_type, 344 struct lp_type coord_type, 345 LLVMValueRef size, 346 LLVMValueRef *out_width, 347 LLVMValueRef *out_height, 348 LLVMValueRef *out_depth); 349 350 351void 352lp_build_unnormalized_coords(struct lp_build_sample_context *bld, 353 LLVMValueRef flt_size, 354 LLVMValueRef *s, 355 LLVMValueRef *t, 356 LLVMValueRef *r); 357 358 359void 360lp_build_cube_lookup(struct lp_build_sample_context *bld, 361 LLVMValueRef s, 362 LLVMValueRef t, 363 LLVMValueRef r, 364 LLVMValueRef *face, 365 LLVMValueRef *face_s, 366 LLVMValueRef *face_t); 367 368 369void 370lp_build_sample_partial_offset(struct lp_build_context *bld, 371 unsigned block_length, 372 LLVMValueRef coord, 373 LLVMValueRef stride, 374 LLVMValueRef *out_offset, 375 LLVMValueRef *out_i); 376 377 378void 379lp_build_sample_offset(struct lp_build_context *bld, 380 const struct util_format_description *format_desc, 381 LLVMValueRef x, 382 LLVMValueRef y, 383 LLVMValueRef z, 384 LLVMValueRef y_stride, 385 LLVMValueRef z_stride, 386 LLVMValueRef *out_offset, 387 LLVMValueRef *out_i, 388 LLVMValueRef *out_j); 389 390 391void 392lp_build_sample_soa(LLVMBuilderRef builder, 393 const struct lp_sampler_static_state *static_state, 394 struct lp_sampler_dynamic_state *dynamic_state, 395 struct lp_type fp_type, 396 unsigned unit, 397 unsigned num_coords, 398 const LLVMValueRef *coords, 399 const LLVMValueRef *ddx, 400 const LLVMValueRef *ddy, 401 LLVMValueRef lod_bias, 402 LLVMValueRef explicit_lod, 403 LLVMValueRef texel_out[4]); 404 405void 406lp_build_sample_nop(struct lp_type type, 407 LLVMValueRef texel_out[4]); 408 409 410#endif /* LP_BLD_SAMPLE_H */ 411