draw_pipe_pstipple.c revision 1c377cea1094c0b5414c663adf2fd393bf41ddfb
1/************************************************************************** 2 * 3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. 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 TUNGSTEN GRAPHICS 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 * Polygon stipple stage: implement polygon stipple with texture map and 30 * fragment program. The fragment program samples the texture and does 31 * a fragment kill for the stipple-failing fragments. 32 * 33 * Authors: Brian Paul 34 */ 35 36 37#include "pipe/p_context.h" 38#include "pipe/p_defines.h" 39#include "pipe/p_shader_tokens.h" 40#include "util/u_inlines.h" 41 42#include "util/u_format.h" 43#include "util/u_math.h" 44#include "util/u_memory.h" 45#include "util/u_sampler.h" 46 47#include "tgsi/tgsi_transform.h" 48#include "tgsi/tgsi_dump.h" 49 50#include "draw_context.h" 51#include "draw_pipe.h" 52 53 54/** Approx number of new tokens for instructions in pstip_transform_inst() */ 55#define NUM_NEW_TOKENS 50 56 57 58/** 59 * Subclass of pipe_shader_state to carry extra fragment shader info. 60 */ 61struct pstip_fragment_shader 62{ 63 struct pipe_shader_state state; 64 void *driver_fs; 65 void *pstip_fs; 66 uint sampler_unit; 67}; 68 69 70/** 71 * Subclass of draw_stage 72 */ 73struct pstip_stage 74{ 75 struct draw_stage stage; 76 77 void *sampler_cso; 78 struct pipe_resource *texture; 79 struct pipe_sampler_view *sampler_view; 80 uint num_samplers; 81 uint num_sampler_views; 82 83 /* 84 * Currently bound state 85 */ 86 struct pstip_fragment_shader *fs; 87 struct { 88 void *samplers[PIPE_MAX_SAMPLERS]; 89 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 90 const struct pipe_poly_stipple *stipple; 91 } state; 92 93 /* 94 * Driver interface/override functions 95 */ 96 void * (*driver_create_fs_state)(struct pipe_context *, 97 const struct pipe_shader_state *); 98 void (*driver_bind_fs_state)(struct pipe_context *, void *); 99 void (*driver_delete_fs_state)(struct pipe_context *, void *); 100 101 void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, void **); 102 103 void (*driver_set_sampler_views)(struct pipe_context *, 104 unsigned, 105 struct pipe_sampler_view **); 106 107 void (*driver_set_polygon_stipple)(struct pipe_context *, 108 const struct pipe_poly_stipple *); 109 110 struct pipe_context *pipe; 111}; 112 113 114 115/** 116 * Subclass of tgsi_transform_context, used for transforming the 117 * user's fragment shader to add the special AA instructions. 118 */ 119struct pstip_transform_context { 120 struct tgsi_transform_context base; 121 uint tempsUsed; /**< bitmask */ 122 int wincoordInput; 123 int maxInput; 124 uint samplersUsed; /**< bitfield of samplers used */ 125 int freeSampler; /** an available sampler for the pstipple */ 126 int texTemp; /**< temp registers */ 127 int numImmed; 128 boolean firstInstruction; 129}; 130 131 132/** 133 * TGSI declaration transform callback. 134 * Look for a free sampler, a free input attrib, and two free temp regs. 135 */ 136static void 137pstip_transform_decl(struct tgsi_transform_context *ctx, 138 struct tgsi_full_declaration *decl) 139{ 140 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 141 142 if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 143 uint i; 144 for (i = decl->Range.First; 145 i <= decl->Range.Last; i++) { 146 pctx->samplersUsed |= 1 << i; 147 } 148 } 149 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 150 pctx->maxInput = MAX2(pctx->maxInput, (int) decl->Range.Last); 151 if (decl->Semantic.Name == TGSI_SEMANTIC_POSITION) 152 pctx->wincoordInput = (int) decl->Range.First; 153 } 154 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 155 uint i; 156 for (i = decl->Range.First; 157 i <= decl->Range.Last; i++) { 158 pctx->tempsUsed |= (1 << i); 159 } 160 } 161 162 ctx->emit_declaration(ctx, decl); 163} 164 165 166static void 167pstip_transform_immed(struct tgsi_transform_context *ctx, 168 struct tgsi_full_immediate *immed) 169{ 170 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 171 pctx->numImmed++; 172} 173 174 175/** 176 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 177 */ 178static int 179free_bit(uint bitfield) 180{ 181 return ffs(~bitfield) - 1; 182} 183 184 185/** 186 * TGSI instruction transform callback. 187 * Replace writes to result.color w/ a temp reg. 188 * Upon END instruction, insert texture sampling code for antialiasing. 189 */ 190static void 191pstip_transform_inst(struct tgsi_transform_context *ctx, 192 struct tgsi_full_instruction *inst) 193{ 194 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 195 196 if (pctx->firstInstruction) { 197 /* emit our new declarations before the first instruction */ 198 199 struct tgsi_full_declaration decl; 200 struct tgsi_full_instruction newInst; 201 uint i; 202 int wincoordInput; 203 204 /* find free sampler */ 205 pctx->freeSampler = free_bit(pctx->samplersUsed); 206 if (pctx->freeSampler >= PIPE_MAX_SAMPLERS) 207 pctx->freeSampler = PIPE_MAX_SAMPLERS - 1; 208 209 if (pctx->wincoordInput < 0) 210 wincoordInput = pctx->maxInput + 1; 211 else 212 wincoordInput = pctx->wincoordInput; 213 214 /* find one free temp reg */ 215 for (i = 0; i < 32; i++) { 216 if ((pctx->tempsUsed & (1 << i)) == 0) { 217 /* found a free temp */ 218 if (pctx->texTemp < 0) 219 pctx->texTemp = i; 220 else 221 break; 222 } 223 } 224 assert(pctx->texTemp >= 0); 225 226 if (pctx->wincoordInput < 0) { 227 /* declare new position input reg */ 228 decl = tgsi_default_full_declaration(); 229 decl.Declaration.File = TGSI_FILE_INPUT; 230 decl.Declaration.Interpolate = TGSI_INTERPOLATE_LINEAR; /* XXX? */ 231 decl.Declaration.Semantic = 1; 232 decl.Semantic.Name = TGSI_SEMANTIC_POSITION; 233 decl.Semantic.Index = 0; 234 decl.Range.First = 235 decl.Range.Last = wincoordInput; 236 ctx->emit_declaration(ctx, &decl); 237 } 238 239 /* declare new sampler */ 240 decl = tgsi_default_full_declaration(); 241 decl.Declaration.File = TGSI_FILE_SAMPLER; 242 decl.Range.First = 243 decl.Range.Last = pctx->freeSampler; 244 ctx->emit_declaration(ctx, &decl); 245 246 /* declare new temp regs */ 247 decl = tgsi_default_full_declaration(); 248 decl.Declaration.File = TGSI_FILE_TEMPORARY; 249 decl.Range.First = 250 decl.Range.Last = pctx->texTemp; 251 ctx->emit_declaration(ctx, &decl); 252 253 /* emit immediate = {1/32, 1/32, 1, 1} 254 * The index/position of this immediate will be pctx->numImmed 255 */ 256 { 257 static const float value[4] = { 1.0/32, 1.0/32, 1.0, 1.0 }; 258 struct tgsi_full_immediate immed; 259 uint size = 4; 260 immed = tgsi_default_full_immediate(); 261 immed.Immediate.NrTokens = 1 + size; /* one for the token itself */ 262 immed.u[0].Float = value[0]; 263 immed.u[1].Float = value[1]; 264 immed.u[2].Float = value[2]; 265 immed.u[3].Float = value[3]; 266 ctx->emit_immediate(ctx, &immed); 267 } 268 269 pctx->firstInstruction = FALSE; 270 271 272 /* 273 * Insert new MUL/TEX/KILP instructions at start of program 274 * Take gl_FragCoord, divide by 32 (stipple size), sample the 275 * texture and kill fragment if needed. 276 * 277 * We'd like to use non-normalized texcoords to index into a RECT 278 * texture, but we can only use GL_REPEAT wrap mode with normalized 279 * texcoords. Darn. 280 */ 281 282 /* MUL texTemp, INPUT[wincoord], 1/32; */ 283 newInst = tgsi_default_full_instruction(); 284 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 285 newInst.Instruction.NumDstRegs = 1; 286 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 287 newInst.Dst[0].Register.Index = pctx->texTemp; 288 newInst.Instruction.NumSrcRegs = 2; 289 newInst.Src[0].Register.File = TGSI_FILE_INPUT; 290 newInst.Src[0].Register.Index = wincoordInput; 291 newInst.Src[1].Register.File = TGSI_FILE_IMMEDIATE; 292 newInst.Src[1].Register.Index = pctx->numImmed; 293 ctx->emit_instruction(ctx, &newInst); 294 295 /* TEX texTemp, texTemp, sampler; */ 296 newInst = tgsi_default_full_instruction(); 297 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 298 newInst.Instruction.NumDstRegs = 1; 299 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 300 newInst.Dst[0].Register.Index = pctx->texTemp; 301 newInst.Instruction.NumSrcRegs = 2; 302 newInst.Instruction.Texture = TRUE; 303 newInst.Texture.Texture = TGSI_TEXTURE_2D; 304 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 305 newInst.Src[0].Register.Index = pctx->texTemp; 306 newInst.Src[1].Register.File = TGSI_FILE_SAMPLER; 307 newInst.Src[1].Register.Index = pctx->freeSampler; 308 ctx->emit_instruction(ctx, &newInst); 309 310 /* KIL -texTemp; # if -texTemp < 0, KILL fragment */ 311 newInst = tgsi_default_full_instruction(); 312 newInst.Instruction.Opcode = TGSI_OPCODE_KIL; 313 newInst.Instruction.NumDstRegs = 0; 314 newInst.Instruction.NumSrcRegs = 1; 315 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 316 newInst.Src[0].Register.Index = pctx->texTemp; 317 newInst.Src[0].Register.Negate = 1; 318 ctx->emit_instruction(ctx, &newInst); 319 } 320 321 /* emit this instruction */ 322 ctx->emit_instruction(ctx, inst); 323} 324 325 326/** 327 * Generate the frag shader we'll use for doing polygon stipple. 328 * This will be the user's shader prefixed with a TEX and KIL instruction. 329 */ 330static boolean 331generate_pstip_fs(struct pstip_stage *pstip) 332{ 333 const struct pipe_shader_state *orig_fs = &pstip->fs->state; 334 /*struct draw_context *draw = pstip->stage.draw;*/ 335 struct pipe_shader_state pstip_fs; 336 struct pstip_transform_context transform; 337 const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; 338 339 pstip_fs = *orig_fs; /* copy to init */ 340 pstip_fs.tokens = tgsi_alloc_tokens(newLen); 341 if (pstip_fs.tokens == NULL) 342 return FALSE; 343 344 memset(&transform, 0, sizeof(transform)); 345 transform.wincoordInput = -1; 346 transform.maxInput = -1; 347 transform.texTemp = -1; 348 transform.firstInstruction = TRUE; 349 transform.base.transform_instruction = pstip_transform_inst; 350 transform.base.transform_declaration = pstip_transform_decl; 351 transform.base.transform_immediate = pstip_transform_immed; 352 353 tgsi_transform_shader(orig_fs->tokens, 354 (struct tgsi_token *) pstip_fs.tokens, 355 newLen, &transform.base); 356 357#if 0 /* DEBUG */ 358 tgsi_dump(orig_fs->tokens, 0); 359 tgsi_dump(pstip_fs.tokens, 0); 360#endif 361 362 pstip->fs->sampler_unit = transform.freeSampler; 363 assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS); 364 365 pstip->fs->pstip_fs = pstip->driver_create_fs_state(pstip->pipe, &pstip_fs); 366 367 FREE((void *)pstip_fs.tokens); 368 return TRUE; 369} 370 371 372/** 373 * Load texture image with current stipple pattern. 374 */ 375static void 376pstip_update_texture(struct pstip_stage *pstip) 377{ 378 static const uint bit31 = 1 << 31; 379 struct pipe_context *pipe = pstip->pipe; 380 struct pipe_transfer *transfer; 381 const uint *stipple = pstip->state.stipple->stipple; 382 uint i, j; 383 ubyte *data; 384 385 /* XXX: want to avoid flushing just because we use stipple: 386 * 387 * Flush should no longer be necessary if driver is properly 388 * interleaving drawing and transfers on a given context: 389 */ 390 pipe->flush( pipe, PIPE_FLUSH_TEXTURE_CACHE, NULL ); 391 392 transfer = pipe_get_transfer(pipe, pstip->texture, 0, 0, 0, 393 PIPE_TRANSFER_WRITE, 0, 0, 32, 32); 394 data = pipe->transfer_map(pipe, transfer); 395 396 /* 397 * Load alpha texture. 398 * Note: 0 means keep the fragment, 255 means kill it. 399 * We'll negate the texel value and use KILP which kills if value 400 * is negative. 401 */ 402 for (i = 0; i < 32; i++) { 403 for (j = 0; j < 32; j++) { 404 if (stipple[i] & (bit31 >> j)) { 405 /* fragment "on" */ 406 data[i * transfer->stride + j] = 0; 407 } 408 else { 409 /* fragment "off" */ 410 data[i * transfer->stride + j] = 255; 411 } 412 } 413 } 414 415 /* unmap */ 416 pipe->transfer_unmap(pipe, transfer); 417 pipe->transfer_destroy(pipe, transfer); 418} 419 420 421/** 422 * Create the texture map we'll use for stippling. 423 */ 424static boolean 425pstip_create_texture(struct pstip_stage *pstip) 426{ 427 struct pipe_context *pipe = pstip->pipe; 428 struct pipe_screen *screen = pipe->screen; 429 struct pipe_resource texTemp; 430 struct pipe_sampler_view viewTempl; 431 432 memset(&texTemp, 0, sizeof(texTemp)); 433 texTemp.target = PIPE_TEXTURE_2D; 434 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 435 texTemp.last_level = 0; 436 texTemp.width0 = 32; 437 texTemp.height0 = 32; 438 texTemp.depth0 = 1; 439 texTemp.bind = PIPE_BIND_SAMPLER_VIEW; 440 441 pstip->texture = screen->resource_create(screen, &texTemp); 442 if (pstip->texture == NULL) 443 return FALSE; 444 445 u_sampler_view_default_template(&viewTempl, 446 pstip->texture, 447 pstip->texture->format); 448 pstip->sampler_view = pipe->create_sampler_view(pipe, 449 pstip->texture, 450 &viewTempl); 451 if (!pstip->sampler_view) { 452 return FALSE; 453 } 454 455 return TRUE; 456} 457 458 459/** 460 * Create the sampler CSO that'll be used for stippling. 461 */ 462static boolean 463pstip_create_sampler(struct pstip_stage *pstip) 464{ 465 struct pipe_sampler_state sampler; 466 struct pipe_context *pipe = pstip->pipe; 467 468 memset(&sampler, 0, sizeof(sampler)); 469 sampler.wrap_s = PIPE_TEX_WRAP_REPEAT; 470 sampler.wrap_t = PIPE_TEX_WRAP_REPEAT; 471 sampler.wrap_r = PIPE_TEX_WRAP_REPEAT; 472 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 473 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 474 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 475 sampler.normalized_coords = 1; 476 sampler.min_lod = 0.0f; 477 sampler.max_lod = 0.0f; 478 479 pstip->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 480 if (pstip->sampler_cso == NULL) 481 return FALSE; 482 483 return TRUE; 484} 485 486 487/** 488 * When we're about to draw our first stipple polygon in a batch, this function 489 * is called to tell the driver to bind our modified fragment shader. 490 */ 491static boolean 492bind_pstip_fragment_shader(struct pstip_stage *pstip) 493{ 494 struct draw_context *draw = pstip->stage.draw; 495 if (!pstip->fs->pstip_fs && 496 !generate_pstip_fs(pstip)) 497 return FALSE; 498 499 draw->suspend_flushing = TRUE; 500 pstip->driver_bind_fs_state(pstip->pipe, pstip->fs->pstip_fs); 501 draw->suspend_flushing = FALSE; 502 return TRUE; 503} 504 505 506static INLINE struct pstip_stage * 507pstip_stage( struct draw_stage *stage ) 508{ 509 return (struct pstip_stage *) stage; 510} 511 512 513static void 514pstip_first_tri(struct draw_stage *stage, struct prim_header *header) 515{ 516 struct pstip_stage *pstip = pstip_stage(stage); 517 struct pipe_context *pipe = pstip->pipe; 518 struct draw_context *draw = stage->draw; 519 uint num_samplers; 520 521 assert(stage->draw->rasterizer->poly_stipple_enable); 522 523 /* bind our fragprog */ 524 if (!bind_pstip_fragment_shader(pstip)) { 525 stage->tri = draw_pipe_passthrough_tri; 526 stage->tri(stage, header); 527 return; 528 } 529 530 531 /* how many samplers? */ 532 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 533 num_samplers = MAX2(pstip->num_sampler_views, pstip->num_samplers); 534 num_samplers = MAX2(num_samplers, pstip->fs->sampler_unit + 1); 535 536 /* plug in our sampler, texture */ 537 pstip->state.samplers[pstip->fs->sampler_unit] = pstip->sampler_cso; 538 pipe_sampler_view_reference(&pstip->state.sampler_views[pstip->fs->sampler_unit], 539 pstip->sampler_view); 540 541 assert(num_samplers <= PIPE_MAX_SAMPLERS); 542 543 draw->suspend_flushing = TRUE; 544 pstip->driver_bind_sampler_states(pipe, num_samplers, pstip->state.samplers); 545 pstip->driver_set_sampler_views(pipe, num_samplers, pstip->state.sampler_views); 546 draw->suspend_flushing = FALSE; 547 548 /* now really draw first triangle */ 549 stage->tri = draw_pipe_passthrough_tri; 550 stage->tri(stage, header); 551} 552 553 554static void 555pstip_flush(struct draw_stage *stage, unsigned flags) 556{ 557 struct draw_context *draw = stage->draw; 558 struct pstip_stage *pstip = pstip_stage(stage); 559 struct pipe_context *pipe = pstip->pipe; 560 561 stage->tri = pstip_first_tri; 562 stage->next->flush( stage->next, flags ); 563 564 /* restore original frag shader, texture, sampler state */ 565 draw->suspend_flushing = TRUE; 566 pstip->driver_bind_fs_state(pipe, pstip->fs->driver_fs); 567 pstip->driver_bind_sampler_states(pipe, pstip->num_samplers, 568 pstip->state.samplers); 569 pstip->driver_set_sampler_views(pipe, 570 pstip->num_sampler_views, 571 pstip->state.sampler_views); 572 draw->suspend_flushing = FALSE; 573} 574 575 576static void 577pstip_reset_stipple_counter(struct draw_stage *stage) 578{ 579 stage->next->reset_stipple_counter( stage->next ); 580} 581 582 583static void 584pstip_destroy(struct draw_stage *stage) 585{ 586 struct pstip_stage *pstip = pstip_stage(stage); 587 uint i; 588 589 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 590 pipe_sampler_view_reference(&pstip->state.sampler_views[i], NULL); 591 } 592 593 pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso); 594 595 pipe_resource_reference(&pstip->texture, NULL); 596 597 if (pstip->sampler_view) { 598 pipe_sampler_view_reference(&pstip->sampler_view, NULL); 599 } 600 601 draw_free_temp_verts( stage ); 602 FREE( stage ); 603} 604 605 606static struct pstip_stage * 607draw_pstip_stage(struct draw_context *draw) 608{ 609 struct pstip_stage *pstip = CALLOC_STRUCT(pstip_stage); 610 if (pstip == NULL) 611 goto fail; 612 613 pstip->stage.draw = draw; 614 pstip->stage.name = "pstip"; 615 pstip->stage.next = NULL; 616 pstip->stage.point = draw_pipe_passthrough_point; 617 pstip->stage.line = draw_pipe_passthrough_line; 618 pstip->stage.tri = pstip_first_tri; 619 pstip->stage.flush = pstip_flush; 620 pstip->stage.reset_stipple_counter = pstip_reset_stipple_counter; 621 pstip->stage.destroy = pstip_destroy; 622 623 if (!draw_alloc_temp_verts( &pstip->stage, 8 )) 624 goto fail; 625 626 return pstip; 627 628fail: 629 if (pstip) 630 pstip->stage.destroy( &pstip->stage ); 631 632 return NULL; 633} 634 635 636static struct pstip_stage * 637pstip_stage_from_pipe(struct pipe_context *pipe) 638{ 639 struct draw_context *draw = (struct draw_context *) pipe->draw; 640 return pstip_stage(draw->pipeline.pstipple); 641} 642 643 644/** 645 * This function overrides the driver's create_fs_state() function and 646 * will typically be called by the state tracker. 647 */ 648static void * 649pstip_create_fs_state(struct pipe_context *pipe, 650 const struct pipe_shader_state *fs) 651{ 652 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 653 struct pstip_fragment_shader *aafs = CALLOC_STRUCT(pstip_fragment_shader); 654 655 if (aafs) { 656 aafs->state = *fs; 657 658 /* pass-through */ 659 aafs->driver_fs = pstip->driver_create_fs_state(pstip->pipe, fs); 660 } 661 662 return aafs; 663} 664 665 666static void 667pstip_bind_fs_state(struct pipe_context *pipe, void *fs) 668{ 669 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 670 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 671 /* save current */ 672 pstip->fs = aafs; 673 /* pass-through */ 674 pstip->driver_bind_fs_state(pstip->pipe, 675 (aafs ? aafs->driver_fs : NULL)); 676} 677 678 679static void 680pstip_delete_fs_state(struct pipe_context *pipe, void *fs) 681{ 682 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 683 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 684 /* pass-through */ 685 pstip->driver_delete_fs_state(pstip->pipe, aafs->driver_fs); 686 687 if (aafs->pstip_fs) 688 pstip->driver_delete_fs_state(pstip->pipe, aafs->pstip_fs); 689 690 FREE(aafs); 691} 692 693 694static void 695pstip_bind_sampler_states(struct pipe_context *pipe, 696 unsigned num, void **sampler) 697{ 698 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 699 uint i; 700 701 /* save current */ 702 memcpy(pstip->state.samplers, sampler, num * sizeof(void *)); 703 for (i = num; i < PIPE_MAX_SAMPLERS; i++) { 704 pstip->state.samplers[i] = NULL; 705 } 706 707 pstip->num_samplers = num; 708 /* pass-through */ 709 pstip->driver_bind_sampler_states(pstip->pipe, num, sampler); 710} 711 712 713static void 714pstip_set_sampler_views(struct pipe_context *pipe, 715 unsigned num, 716 struct pipe_sampler_view **views) 717{ 718 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 719 uint i; 720 721 /* save current */ 722 for (i = 0; i < num; i++) { 723 pipe_sampler_view_reference(&pstip->state.sampler_views[i], views[i]); 724 } 725 for (; i < PIPE_MAX_SAMPLERS; i++) { 726 pipe_sampler_view_reference(&pstip->state.sampler_views[i], NULL); 727 } 728 729 pstip->num_sampler_views = num; 730 731 /* pass-through */ 732 pstip->driver_set_sampler_views(pstip->pipe, num, views); 733} 734 735 736static void 737pstip_set_polygon_stipple(struct pipe_context *pipe, 738 const struct pipe_poly_stipple *stipple) 739{ 740 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 741 742 /* save current */ 743 pstip->state.stipple = stipple; 744 745 /* pass-through */ 746 pstip->driver_set_polygon_stipple(pstip->pipe, stipple); 747 748 pstip_update_texture(pstip); 749} 750 751 752/** 753 * Called by drivers that want to install this polygon stipple stage 754 * into the draw module's pipeline. This will not be used if the 755 * hardware has native support for polygon stipple. 756 */ 757boolean 758draw_install_pstipple_stage(struct draw_context *draw, 759 struct pipe_context *pipe) 760{ 761 struct pstip_stage *pstip; 762 763 pipe->draw = (void *) draw; 764 765 /* 766 * Create / install pgon stipple drawing / prim stage 767 */ 768 pstip = draw_pstip_stage( draw ); 769 if (pstip == NULL) 770 goto fail; 771 772 draw->pipeline.pstipple = &pstip->stage; 773 774 pstip->pipe = pipe; 775 776 /* create special texture, sampler state */ 777 if (!pstip_create_texture(pstip)) 778 goto fail; 779 780 if (!pstip_create_sampler(pstip)) 781 goto fail; 782 783 /* save original driver functions */ 784 pstip->driver_create_fs_state = pipe->create_fs_state; 785 pstip->driver_bind_fs_state = pipe->bind_fs_state; 786 pstip->driver_delete_fs_state = pipe->delete_fs_state; 787 788 pstip->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 789 pstip->driver_set_sampler_views = pipe->set_fragment_sampler_views; 790 pstip->driver_set_polygon_stipple = pipe->set_polygon_stipple; 791 792 /* override the driver's functions */ 793 pipe->create_fs_state = pstip_create_fs_state; 794 pipe->bind_fs_state = pstip_bind_fs_state; 795 pipe->delete_fs_state = pstip_delete_fs_state; 796 797 pipe->bind_fragment_sampler_states = pstip_bind_sampler_states; 798 pipe->set_fragment_sampler_views = pstip_set_sampler_views; 799 pipe->set_polygon_stipple = pstip_set_polygon_stipple; 800 801 return TRUE; 802 803 fail: 804 if (pstip) 805 pstip->stage.destroy( &pstip->stage ); 806 807 return FALSE; 808} 809