1 /************************************************************************** 2 * 3 * Copyright 2007 VMware, Inc. 4 * Copyright 2010 VMware, Inc. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 **************************************************************************/ 28 29 /** 30 * \brief Quad depth / stencil testing 31 */ 32 33 #include "pipe/p_defines.h" 34 #include "util/u_format.h" 35 #include "util/u_math.h" 36 #include "util/u_memory.h" 37 #include "tgsi/tgsi_scan.h" 38 #include "sp_context.h" 39 #include "sp_quad.h" 40 #include "sp_quad_pipe.h" 41 #include "sp_tile_cache.h" 42 #include "sp_state.h" /* for sp_fragment_shader */ 43 44 45 struct depth_data { 46 struct pipe_surface *ps; 47 enum pipe_format format; 48 unsigned bzzzz[TGSI_QUAD_SIZE]; /**< Z values fetched from depth buffer */ 49 unsigned qzzzz[TGSI_QUAD_SIZE]; /**< Z values from the quad */ 50 ubyte stencilVals[TGSI_QUAD_SIZE]; 51 boolean use_shader_stencil_refs; 52 ubyte shader_stencil_refs[TGSI_QUAD_SIZE]; 53 struct softpipe_cached_tile *tile; 54 float minval, maxval; 55 bool clamp; 56 }; 57 58 59 60 static void 61 get_depth_stencil_values( struct depth_data *data, 62 const struct quad_header *quad ) 63 { 64 unsigned j; 65 const struct softpipe_cached_tile *tile = data->tile; 66 67 switch (data->format) { 68 case PIPE_FORMAT_Z16_UNORM: 69 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 70 int x = quad->input.x0 % TILE_SIZE + (j & 1); 71 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 72 data->bzzzz[j] = tile->data.depth16[y][x]; 73 } 74 break; 75 case PIPE_FORMAT_Z32_UNORM: 76 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 77 int x = quad->input.x0 % TILE_SIZE + (j & 1); 78 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 79 data->bzzzz[j] = tile->data.depth32[y][x]; 80 } 81 break; 82 case PIPE_FORMAT_Z24X8_UNORM: 83 case PIPE_FORMAT_Z24_UNORM_S8_UINT: 84 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 85 int x = quad->input.x0 % TILE_SIZE + (j & 1); 86 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 87 data->bzzzz[j] = tile->data.depth32[y][x] & 0xffffff; 88 data->stencilVals[j] = tile->data.depth32[y][x] >> 24; 89 } 90 break; 91 case PIPE_FORMAT_X8Z24_UNORM: 92 case PIPE_FORMAT_S8_UINT_Z24_UNORM: 93 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 94 int x = quad->input.x0 % TILE_SIZE + (j & 1); 95 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 96 data->bzzzz[j] = tile->data.depth32[y][x] >> 8; 97 data->stencilVals[j] = tile->data.depth32[y][x] & 0xff; 98 } 99 break; 100 case PIPE_FORMAT_S8_UINT: 101 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 102 int x = quad->input.x0 % TILE_SIZE + (j & 1); 103 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 104 data->bzzzz[j] = 0; 105 data->stencilVals[j] = tile->data.stencil8[y][x]; 106 } 107 break; 108 case PIPE_FORMAT_Z32_FLOAT: 109 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 110 int x = quad->input.x0 % TILE_SIZE + (j & 1); 111 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 112 data->bzzzz[j] = tile->data.depth32[y][x]; 113 } 114 break; 115 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: 116 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 117 int x = quad->input.x0 % TILE_SIZE + (j & 1); 118 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 119 data->bzzzz[j] = tile->data.depth64[y][x] & 0xffffffff; 120 data->stencilVals[j] = (tile->data.depth64[y][x] >> 32) & 0xff; 121 } 122 break; 123 default: 124 assert(0); 125 } 126 } 127 128 129 /** 130 * If the shader has not been run, interpolate the depth values 131 * ourselves. 132 */ 133 static void 134 interpolate_quad_depth( struct quad_header *quad ) 135 { 136 const float fx = (float) quad->input.x0; 137 const float fy = (float) quad->input.y0; 138 const float dzdx = quad->posCoef->dadx[2]; 139 const float dzdy = quad->posCoef->dady[2]; 140 const float z0 = quad->posCoef->a0[2] + dzdx * fx + dzdy * fy; 141 142 quad->output.depth[0] = z0; 143 quad->output.depth[1] = z0 + dzdx; 144 quad->output.depth[2] = z0 + dzdy; 145 quad->output.depth[3] = z0 + dzdx + dzdy; 146 } 147 148 149 /** 150 * Compute the depth_data::qzzzz[] values from the float fragment Z values. 151 */ 152 static void 153 convert_quad_depth( struct depth_data *data, 154 const struct quad_header *quad ) 155 { 156 unsigned j; 157 float dvals[TGSI_QUAD_SIZE]; 158 159 /* Convert quad's float depth values to int depth values (qzzzz). 160 * If the Z buffer stores integer values, we _have_ to do the depth 161 * compares with integers (not floats). Otherwise, the float->int->float 162 * conversion of Z values (which isn't an identity function) will cause 163 * Z-fighting errors. 164 */ 165 if (data->clamp) { 166 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 167 dvals[j] = CLAMP(quad->output.depth[j], data->minval, data->maxval); 168 } 169 } else { 170 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 171 dvals[j] = quad->output.depth[j]; 172 } 173 } 174 175 switch (data->format) { 176 case PIPE_FORMAT_Z16_UNORM: 177 { 178 float scale = 65535.0; 179 180 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 181 data->qzzzz[j] = (unsigned) (dvals[j] * scale); 182 } 183 } 184 break; 185 case PIPE_FORMAT_Z32_UNORM: 186 { 187 double scale = (double) (uint) ~0UL; 188 189 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 190 data->qzzzz[j] = (unsigned) (dvals[j] * scale); 191 } 192 } 193 break; 194 case PIPE_FORMAT_Z24X8_UNORM: 195 case PIPE_FORMAT_Z24_UNORM_S8_UINT: 196 { 197 float scale = (float) ((1 << 24) - 1); 198 199 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 200 data->qzzzz[j] = (unsigned) (dvals[j] * scale); 201 } 202 } 203 break; 204 case PIPE_FORMAT_X8Z24_UNORM: 205 case PIPE_FORMAT_S8_UINT_Z24_UNORM: 206 { 207 float scale = (float) ((1 << 24) - 1); 208 209 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 210 data->qzzzz[j] = (unsigned) (dvals[j] * scale); 211 } 212 } 213 break; 214 case PIPE_FORMAT_Z32_FLOAT: 215 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: 216 { 217 union fi fui; 218 219 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 220 fui.f = dvals[j]; 221 data->qzzzz[j] = fui.ui; 222 } 223 } 224 break; 225 default: 226 assert(0); 227 } 228 } 229 230 231 /** 232 * Compute the depth_data::shader_stencil_refs[] values from the float 233 * fragment stencil values. 234 */ 235 static void 236 convert_quad_stencil( struct depth_data *data, 237 const struct quad_header *quad ) 238 { 239 unsigned j; 240 241 data->use_shader_stencil_refs = TRUE; 242 /* Copy quads stencil values 243 */ 244 switch (data->format) { 245 case PIPE_FORMAT_Z24X8_UNORM: 246 case PIPE_FORMAT_Z24_UNORM_S8_UINT: 247 case PIPE_FORMAT_X8Z24_UNORM: 248 case PIPE_FORMAT_S8_UINT_Z24_UNORM: 249 case PIPE_FORMAT_S8_UINT: 250 case PIPE_FORMAT_Z32_FLOAT: 251 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: 252 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 253 data->shader_stencil_refs[j] = ((unsigned)(quad->output.stencil[j])); 254 } 255 break; 256 default: 257 assert(0); 258 } 259 } 260 261 262 /** 263 * Write data->bzzzz[] values and data->stencilVals into the Z/stencil buffer. 264 */ 265 static void 266 write_depth_stencil_values( struct depth_data *data, 267 struct quad_header *quad ) 268 { 269 struct softpipe_cached_tile *tile = data->tile; 270 unsigned j; 271 272 /* put updated Z values back into cached tile */ 273 switch (data->format) { 274 case PIPE_FORMAT_Z16_UNORM: 275 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 276 int x = quad->input.x0 % TILE_SIZE + (j & 1); 277 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 278 tile->data.depth16[y][x] = (ushort) data->bzzzz[j]; 279 } 280 break; 281 case PIPE_FORMAT_Z24X8_UNORM: 282 case PIPE_FORMAT_Z32_UNORM: 283 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 284 int x = quad->input.x0 % TILE_SIZE + (j & 1); 285 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 286 tile->data.depth32[y][x] = data->bzzzz[j]; 287 } 288 break; 289 case PIPE_FORMAT_Z24_UNORM_S8_UINT: 290 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 291 int x = quad->input.x0 % TILE_SIZE + (j & 1); 292 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 293 tile->data.depth32[y][x] = (data->stencilVals[j] << 24) | data->bzzzz[j]; 294 } 295 break; 296 case PIPE_FORMAT_S8_UINT_Z24_UNORM: 297 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 298 int x = quad->input.x0 % TILE_SIZE + (j & 1); 299 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 300 tile->data.depth32[y][x] = (data->bzzzz[j] << 8) | data->stencilVals[j]; 301 } 302 break; 303 case PIPE_FORMAT_X8Z24_UNORM: 304 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 305 int x = quad->input.x0 % TILE_SIZE + (j & 1); 306 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 307 tile->data.depth32[y][x] = data->bzzzz[j] << 8; 308 } 309 break; 310 case PIPE_FORMAT_S8_UINT: 311 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 312 int x = quad->input.x0 % TILE_SIZE + (j & 1); 313 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 314 tile->data.stencil8[y][x] = data->stencilVals[j]; 315 } 316 break; 317 case PIPE_FORMAT_Z32_FLOAT: 318 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 319 int x = quad->input.x0 % TILE_SIZE + (j & 1); 320 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 321 tile->data.depth32[y][x] = data->bzzzz[j]; 322 } 323 break; 324 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: 325 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 326 int x = quad->input.x0 % TILE_SIZE + (j & 1); 327 int y = quad->input.y0 % TILE_SIZE + (j >> 1); 328 tile->data.depth64[y][x] = (uint64_t)data->bzzzz[j] | ((uint64_t)data->stencilVals[j] << 32); 329 } 330 break; 331 default: 332 assert(0); 333 } 334 } 335 336 337 338 /** Only 8-bit stencil supported */ 339 #define STENCIL_MAX 0xff 340 341 342 /** 343 * Do the basic stencil test (compare stencil buffer values against the 344 * reference value. 345 * 346 * \param data->stencilVals the stencil values from the stencil buffer 347 * \param func the stencil func (PIPE_FUNC_x) 348 * \param ref the stencil reference value 349 * \param valMask the stencil value mask indicating which bits of the stencil 350 * values and ref value are to be used. 351 * \return mask indicating which pixels passed the stencil test 352 */ 353 static unsigned 354 do_stencil_test(struct depth_data *data, 355 unsigned func, 356 unsigned ref, unsigned valMask) 357 { 358 unsigned passMask = 0x0; 359 unsigned j; 360 ubyte refs[TGSI_QUAD_SIZE]; 361 362 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 363 if (data->use_shader_stencil_refs) 364 refs[j] = data->shader_stencil_refs[j] & valMask; 365 else 366 refs[j] = ref & valMask; 367 } 368 369 switch (func) { 370 case PIPE_FUNC_NEVER: 371 /* passMask = 0x0 */ 372 break; 373 case PIPE_FUNC_LESS: 374 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 375 if (refs[j] < (data->stencilVals[j] & valMask)) { 376 passMask |= (1 << j); 377 } 378 } 379 break; 380 case PIPE_FUNC_EQUAL: 381 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 382 if (refs[j] == (data->stencilVals[j] & valMask)) { 383 passMask |= (1 << j); 384 } 385 } 386 break; 387 case PIPE_FUNC_LEQUAL: 388 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 389 if (refs[j] <= (data->stencilVals[j] & valMask)) { 390 passMask |= (1 << j); 391 } 392 } 393 break; 394 case PIPE_FUNC_GREATER: 395 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 396 if (refs[j] > (data->stencilVals[j] & valMask)) { 397 passMask |= (1 << j); 398 } 399 } 400 break; 401 case PIPE_FUNC_NOTEQUAL: 402 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 403 if (refs[j] != (data->stencilVals[j] & valMask)) { 404 passMask |= (1 << j); 405 } 406 } 407 break; 408 case PIPE_FUNC_GEQUAL: 409 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 410 if (refs[j] >= (data->stencilVals[j] & valMask)) { 411 passMask |= (1 << j); 412 } 413 } 414 break; 415 case PIPE_FUNC_ALWAYS: 416 passMask = MASK_ALL; 417 break; 418 default: 419 assert(0); 420 } 421 422 return passMask; 423 } 424 425 426 /** 427 * Apply the stencil operator to stencil values. 428 * 429 * \param data->stencilVals the stencil buffer values (read and written) 430 * \param mask indicates which pixels to update 431 * \param op the stencil operator (PIPE_STENCIL_OP_x) 432 * \param ref the stencil reference value 433 * \param wrtMask writemask controlling which bits are changed in the 434 * stencil values 435 */ 436 static void 437 apply_stencil_op(struct depth_data *data, 438 unsigned mask, unsigned op, ubyte ref, ubyte wrtMask) 439 { 440 unsigned j; 441 ubyte newstencil[TGSI_QUAD_SIZE]; 442 ubyte refs[TGSI_QUAD_SIZE]; 443 444 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 445 newstencil[j] = data->stencilVals[j]; 446 if (data->use_shader_stencil_refs) 447 refs[j] = data->shader_stencil_refs[j]; 448 else 449 refs[j] = ref; 450 } 451 452 switch (op) { 453 case PIPE_STENCIL_OP_KEEP: 454 /* no-op */ 455 break; 456 case PIPE_STENCIL_OP_ZERO: 457 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 458 if (mask & (1 << j)) { 459 newstencil[j] = 0; 460 } 461 } 462 break; 463 case PIPE_STENCIL_OP_REPLACE: 464 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 465 if (mask & (1 << j)) { 466 newstencil[j] = refs[j]; 467 } 468 } 469 break; 470 case PIPE_STENCIL_OP_INCR: 471 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 472 if (mask & (1 << j)) { 473 if (data->stencilVals[j] < STENCIL_MAX) { 474 newstencil[j] = data->stencilVals[j] + 1; 475 } 476 } 477 } 478 break; 479 case PIPE_STENCIL_OP_DECR: 480 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 481 if (mask & (1 << j)) { 482 if (data->stencilVals[j] > 0) { 483 newstencil[j] = data->stencilVals[j] - 1; 484 } 485 } 486 } 487 break; 488 case PIPE_STENCIL_OP_INCR_WRAP: 489 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 490 if (mask & (1 << j)) { 491 newstencil[j] = data->stencilVals[j] + 1; 492 } 493 } 494 break; 495 case PIPE_STENCIL_OP_DECR_WRAP: 496 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 497 if (mask & (1 << j)) { 498 newstencil[j] = data->stencilVals[j] - 1; 499 } 500 } 501 break; 502 case PIPE_STENCIL_OP_INVERT: 503 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 504 if (mask & (1 << j)) { 505 newstencil[j] = ~data->stencilVals[j]; 506 } 507 } 508 break; 509 default: 510 assert(0); 511 } 512 513 /* 514 * update the stencil values 515 */ 516 if (wrtMask != STENCIL_MAX) { 517 /* apply bit-wise stencil buffer writemask */ 518 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 519 data->stencilVals[j] = (wrtMask & newstencil[j]) | (~wrtMask & data->stencilVals[j]); 520 } 521 } 522 else { 523 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 524 data->stencilVals[j] = newstencil[j]; 525 } 526 } 527 } 528 529 530 531 /** 532 * To increase efficiency, we should probably have multiple versions 533 * of this function that are specifically for Z16, Z32 and FP Z buffers. 534 * Try to effectively do that with codegen... 535 */ 536 static boolean 537 depth_test_quad(struct quad_stage *qs, 538 struct depth_data *data, 539 struct quad_header *quad) 540 { 541 struct softpipe_context *softpipe = qs->softpipe; 542 unsigned zmask = 0; 543 unsigned j; 544 545 switch (softpipe->depth_stencil->depth.func) { 546 case PIPE_FUNC_NEVER: 547 /* zmask = 0 */ 548 break; 549 case PIPE_FUNC_LESS: 550 /* Note this is pretty much a single sse or cell instruction. 551 * Like this: quad->mask &= (quad->outputs.depth < zzzz); 552 */ 553 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 554 if (data->qzzzz[j] < data->bzzzz[j]) 555 zmask |= 1 << j; 556 } 557 break; 558 case PIPE_FUNC_EQUAL: 559 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 560 if (data->qzzzz[j] == data->bzzzz[j]) 561 zmask |= 1 << j; 562 } 563 break; 564 case PIPE_FUNC_LEQUAL: 565 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 566 if (data->qzzzz[j] <= data->bzzzz[j]) 567 zmask |= (1 << j); 568 } 569 break; 570 case PIPE_FUNC_GREATER: 571 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 572 if (data->qzzzz[j] > data->bzzzz[j]) 573 zmask |= (1 << j); 574 } 575 break; 576 case PIPE_FUNC_NOTEQUAL: 577 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 578 if (data->qzzzz[j] != data->bzzzz[j]) 579 zmask |= (1 << j); 580 } 581 break; 582 case PIPE_FUNC_GEQUAL: 583 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 584 if (data->qzzzz[j] >= data->bzzzz[j]) 585 zmask |= (1 << j); 586 } 587 break; 588 case PIPE_FUNC_ALWAYS: 589 zmask = MASK_ALL; 590 break; 591 default: 592 assert(0); 593 } 594 595 quad->inout.mask &= zmask; 596 if (quad->inout.mask == 0) 597 return FALSE; 598 599 /* Update our internal copy only if writemask set. Even if 600 * depth.writemask is FALSE, may still need to write out buffer 601 * data due to stencil changes. 602 */ 603 if (softpipe->depth_stencil->depth.writemask) { 604 for (j = 0; j < TGSI_QUAD_SIZE; j++) { 605 if (quad->inout.mask & (1 << j)) { 606 data->bzzzz[j] = data->qzzzz[j]; 607 } 608 } 609 } 610 611 return TRUE; 612 } 613 614 615 616 /** 617 * Do stencil (and depth) testing. Stenciling depends on the outcome of 618 * depth testing. 619 */ 620 static void 621 depth_stencil_test_quad(struct quad_stage *qs, 622 struct depth_data *data, 623 struct quad_header *quad) 624 { 625 struct softpipe_context *softpipe = qs->softpipe; 626 unsigned func, zFailOp, zPassOp, failOp; 627 ubyte ref, wrtMask, valMask; 628 uint face = quad->input.facing; 629 630 if (!softpipe->depth_stencil->stencil[1].enabled) { 631 /* single-sided stencil test, use front (face=0) state */ 632 face = 0; 633 } 634 635 /* 0 = front-face, 1 = back-face */ 636 assert(face == 0 || face == 1); 637 638 /* choose front or back face function, operator, etc */ 639 /* XXX we could do these initializations once per primitive */ 640 func = softpipe->depth_stencil->stencil[face].func; 641 failOp = softpipe->depth_stencil->stencil[face].fail_op; 642 zFailOp = softpipe->depth_stencil->stencil[face].zfail_op; 643 zPassOp = softpipe->depth_stencil->stencil[face].zpass_op; 644 ref = softpipe->stencil_ref.ref_value[face]; 645 wrtMask = softpipe->depth_stencil->stencil[face].writemask; 646 valMask = softpipe->depth_stencil->stencil[face].valuemask; 647 648 /* do the stencil test first */ 649 { 650 unsigned passMask, failMask; 651 passMask = do_stencil_test(data, func, ref, valMask); 652 failMask = quad->inout.mask & ~passMask; 653 quad->inout.mask &= passMask; 654 655 if (failOp != PIPE_STENCIL_OP_KEEP) { 656 apply_stencil_op(data, failMask, failOp, ref, wrtMask); 657 } 658 } 659 660 if (quad->inout.mask) { 661 /* now the pixels that passed the stencil test are depth tested */ 662 if (softpipe->depth_stencil->depth.enabled) { 663 const unsigned origMask = quad->inout.mask; 664 665 depth_test_quad(qs, data, quad); /* quad->mask is updated */ 666 667 /* update stencil buffer values according to z pass/fail result */ 668 if (zFailOp != PIPE_STENCIL_OP_KEEP) { 669 const unsigned zFailMask = origMask & ~quad->inout.mask; 670 apply_stencil_op(data, zFailMask, zFailOp, ref, wrtMask); 671 } 672 673 if (zPassOp != PIPE_STENCIL_OP_KEEP) { 674 const unsigned zPassMask = origMask & quad->inout.mask; 675 apply_stencil_op(data, zPassMask, zPassOp, ref, wrtMask); 676 } 677 } 678 else { 679 /* no depth test, apply Zpass operator to stencil buffer values */ 680 apply_stencil_op(data, quad->inout.mask, zPassOp, ref, wrtMask); 681 } 682 } 683 } 684 685 686 #define ALPHATEST( FUNC, COMP ) \ 687 static unsigned \ 688 alpha_test_quads_##FUNC( struct quad_stage *qs, \ 689 struct quad_header *quads[], \ 690 unsigned nr ) \ 691 { \ 692 const float ref = qs->softpipe->depth_stencil->alpha.ref_value; \ 693 const uint cbuf = 0; /* only output[0].alpha is tested */ \ 694 unsigned pass_nr = 0; \ 695 unsigned i; \ 696 \ 697 for (i = 0; i < nr; i++) { \ 698 const float *aaaa = quads[i]->output.color[cbuf][3]; \ 699 unsigned passMask = 0; \ 700 \ 701 if (aaaa[0] COMP ref) passMask |= (1 << 0); \ 702 if (aaaa[1] COMP ref) passMask |= (1 << 1); \ 703 if (aaaa[2] COMP ref) passMask |= (1 << 2); \ 704 if (aaaa[3] COMP ref) passMask |= (1 << 3); \ 705 \ 706 quads[i]->inout.mask &= passMask; \ 707 \ 708 if (quads[i]->inout.mask) \ 709 quads[pass_nr++] = quads[i]; \ 710 } \ 711 \ 712 return pass_nr; \ 713 } 714 715 716 ALPHATEST( LESS, < ) 717 ALPHATEST( EQUAL, == ) 718 ALPHATEST( LEQUAL, <= ) 719 ALPHATEST( GREATER, > ) 720 ALPHATEST( NOTEQUAL, != ) 721 ALPHATEST( GEQUAL, >= ) 722 723 724 /* XXX: Incorporate into shader using KILL_IF. 725 */ 726 static unsigned 727 alpha_test_quads(struct quad_stage *qs, 728 struct quad_header *quads[], 729 unsigned nr) 730 { 731 switch (qs->softpipe->depth_stencil->alpha.func) { 732 case PIPE_FUNC_LESS: 733 return alpha_test_quads_LESS( qs, quads, nr ); 734 case PIPE_FUNC_EQUAL: 735 return alpha_test_quads_EQUAL( qs, quads, nr ); 736 case PIPE_FUNC_LEQUAL: 737 return alpha_test_quads_LEQUAL( qs, quads, nr ); 738 case PIPE_FUNC_GREATER: 739 return alpha_test_quads_GREATER( qs, quads, nr ); 740 case PIPE_FUNC_NOTEQUAL: 741 return alpha_test_quads_NOTEQUAL( qs, quads, nr ); 742 case PIPE_FUNC_GEQUAL: 743 return alpha_test_quads_GEQUAL( qs, quads, nr ); 744 case PIPE_FUNC_ALWAYS: 745 return nr; 746 case PIPE_FUNC_NEVER: 747 default: 748 return 0; 749 } 750 } 751 752 753 static unsigned mask_count[16] = 754 { 755 0, /* 0x0 */ 756 1, /* 0x1 */ 757 1, /* 0x2 */ 758 2, /* 0x3 */ 759 1, /* 0x4 */ 760 2, /* 0x5 */ 761 2, /* 0x6 */ 762 3, /* 0x7 */ 763 1, /* 0x8 */ 764 2, /* 0x9 */ 765 2, /* 0xa */ 766 3, /* 0xb */ 767 2, /* 0xc */ 768 3, /* 0xd */ 769 3, /* 0xe */ 770 4, /* 0xf */ 771 }; 772 773 774 775 /** 776 * General depth/stencil test function. Used when there's no fast-path. 777 */ 778 static void 779 depth_test_quads_fallback(struct quad_stage *qs, 780 struct quad_header *quads[], 781 unsigned nr) 782 { 783 unsigned i, pass = 0; 784 const struct tgsi_shader_info *fsInfo = &qs->softpipe->fs_variant->info; 785 boolean interp_depth = !fsInfo->writes_z || qs->softpipe->early_depth; 786 boolean shader_stencil_ref = fsInfo->writes_stencil; 787 struct depth_data data; 788 unsigned vp_idx = quads[0]->input.viewport_index; 789 790 data.use_shader_stencil_refs = FALSE; 791 792 if (qs->softpipe->depth_stencil->alpha.enabled) { 793 nr = alpha_test_quads(qs, quads, nr); 794 } 795 796 if (qs->softpipe->framebuffer.zsbuf && 797 (qs->softpipe->depth_stencil->depth.enabled || 798 qs->softpipe->depth_stencil->stencil[0].enabled)) { 799 float near_val, far_val; 800 801 data.ps = qs->softpipe->framebuffer.zsbuf; 802 data.format = data.ps->format; 803 data.tile = sp_get_cached_tile(qs->softpipe->zsbuf_cache, 804 quads[0]->input.x0, 805 quads[0]->input.y0, quads[0]->input.layer); 806 data.clamp = !qs->softpipe->rasterizer->depth_clip; 807 808 near_val = qs->softpipe->viewports[vp_idx].translate[2] - qs->softpipe->viewports[vp_idx].scale[2]; 809 far_val = near_val + (qs->softpipe->viewports[vp_idx].scale[2] * 2.0); 810 data.minval = MIN2(near_val, far_val); 811 data.maxval = MAX2(near_val, far_val); 812 813 for (i = 0; i < nr; i++) { 814 get_depth_stencil_values(&data, quads[i]); 815 816 if (qs->softpipe->depth_stencil->depth.enabled) { 817 if (interp_depth) 818 interpolate_quad_depth(quads[i]); 819 820 convert_quad_depth(&data, quads[i]); 821 } 822 823 if (qs->softpipe->depth_stencil->stencil[0].enabled) { 824 if (shader_stencil_ref) 825 convert_quad_stencil(&data, quads[i]); 826 827 depth_stencil_test_quad(qs, &data, quads[i]); 828 write_depth_stencil_values(&data, quads[i]); 829 } 830 else { 831 if (!depth_test_quad(qs, &data, quads[i])) 832 continue; 833 834 if (qs->softpipe->depth_stencil->depth.writemask) 835 write_depth_stencil_values(&data, quads[i]); 836 } 837 838 quads[pass++] = quads[i]; 839 } 840 841 nr = pass; 842 } 843 844 if (qs->softpipe->active_query_count) { 845 for (i = 0; i < nr; i++) 846 qs->softpipe->occlusion_count += mask_count[quads[i]->inout.mask]; 847 } 848 849 if (nr) 850 qs->next->run(qs->next, quads, nr); 851 } 852 853 854 /** 855 * Special-case Z testing for 16-bit Zbuffer and Z buffer writes enabled. 856 */ 857 858 #define NAME depth_interp_z16_less_write 859 #define OPERATOR < 860 #include "sp_quad_depth_test_tmp.h" 861 862 #define NAME depth_interp_z16_equal_write 863 #define OPERATOR == 864 #include "sp_quad_depth_test_tmp.h" 865 866 #define NAME depth_interp_z16_lequal_write 867 #define OPERATOR <= 868 #include "sp_quad_depth_test_tmp.h" 869 870 #define NAME depth_interp_z16_greater_write 871 #define OPERATOR > 872 #include "sp_quad_depth_test_tmp.h" 873 874 #define NAME depth_interp_z16_notequal_write 875 #define OPERATOR != 876 #include "sp_quad_depth_test_tmp.h" 877 878 #define NAME depth_interp_z16_gequal_write 879 #define OPERATOR >= 880 #include "sp_quad_depth_test_tmp.h" 881 882 #define NAME depth_interp_z16_always_write 883 #define ALWAYS 1 884 #include "sp_quad_depth_test_tmp.h" 885 886 887 888 static void 889 depth_noop(struct quad_stage *qs, 890 struct quad_header *quads[], 891 unsigned nr) 892 { 893 qs->next->run(qs->next, quads, nr); 894 } 895 896 897 898 static void 899 choose_depth_test(struct quad_stage *qs, 900 struct quad_header *quads[], 901 unsigned nr) 902 { 903 const struct tgsi_shader_info *fsInfo = &qs->softpipe->fs_variant->info; 904 905 boolean interp_depth = !fsInfo->writes_z || qs->softpipe->early_depth; 906 907 boolean alpha = qs->softpipe->depth_stencil->alpha.enabled; 908 909 boolean depth = qs->softpipe->depth_stencil->depth.enabled; 910 911 unsigned depthfunc = qs->softpipe->depth_stencil->depth.func; 912 913 boolean stencil = qs->softpipe->depth_stencil->stencil[0].enabled; 914 915 boolean depthwrite = qs->softpipe->depth_stencil->depth.writemask; 916 917 boolean occlusion = qs->softpipe->active_query_count; 918 919 boolean clipped = !qs->softpipe->rasterizer->depth_clip; 920 921 if(!qs->softpipe->framebuffer.zsbuf) 922 depth = depthwrite = stencil = FALSE; 923 924 /* default */ 925 qs->run = depth_test_quads_fallback; 926 927 /* look for special cases */ 928 if (!alpha && 929 !depth && 930 !occlusion && 931 !clipped && 932 !stencil) { 933 qs->run = depth_noop; 934 } 935 else if (!alpha && 936 interp_depth && 937 depth && 938 depthwrite && 939 !occlusion && 940 !clipped && 941 !stencil) 942 { 943 if (qs->softpipe->framebuffer.zsbuf->format == PIPE_FORMAT_Z16_UNORM) { 944 switch (depthfunc) { 945 case PIPE_FUNC_NEVER: 946 qs->run = depth_test_quads_fallback; 947 break; 948 case PIPE_FUNC_LESS: 949 qs->run = depth_interp_z16_less_write; 950 break; 951 case PIPE_FUNC_EQUAL: 952 qs->run = depth_interp_z16_equal_write; 953 break; 954 case PIPE_FUNC_LEQUAL: 955 qs->run = depth_interp_z16_lequal_write; 956 break; 957 case PIPE_FUNC_GREATER: 958 qs->run = depth_interp_z16_greater_write; 959 break; 960 case PIPE_FUNC_NOTEQUAL: 961 qs->run = depth_interp_z16_notequal_write; 962 break; 963 case PIPE_FUNC_GEQUAL: 964 qs->run = depth_interp_z16_gequal_write; 965 break; 966 case PIPE_FUNC_ALWAYS: 967 qs->run = depth_interp_z16_always_write; 968 break; 969 default: 970 qs->run = depth_test_quads_fallback; 971 break; 972 } 973 } 974 } 975 976 /* next quad/fragment stage */ 977 qs->run( qs, quads, nr ); 978 } 979 980 981 982 static void 983 depth_test_begin(struct quad_stage *qs) 984 { 985 qs->run = choose_depth_test; 986 qs->next->begin(qs->next); 987 } 988 989 990 static void 991 depth_test_destroy(struct quad_stage *qs) 992 { 993 FREE( qs ); 994 } 995 996 997 struct quad_stage * 998 sp_quad_depth_test_stage(struct softpipe_context *softpipe) 999 { 1000 struct quad_stage *stage = CALLOC_STRUCT(quad_stage); 1001 1002 stage->softpipe = softpipe; 1003 stage->begin = depth_test_begin; 1004 stage->run = choose_depth_test; 1005 stage->destroy = depth_test_destroy; 1006 1007 return stage; 1008 } 1009
