draw_pipe_pstipple.c revision 87eec80c1120d2cd9749ee360b77922feabf7f10
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 41#include "util/u_math.h" 42#include "util/u_memory.h" 43 44#include "tgsi/tgsi_transform.h" 45#include "tgsi/tgsi_dump.h" 46 47#include "draw_context.h" 48#include "draw_pipe.h" 49 50 51 52/** 53 * Subclass of pipe_shader_state to carry extra fragment shader info. 54 */ 55struct pstip_fragment_shader 56{ 57 struct pipe_shader_state state; 58 void *driver_fs; 59 void *pstip_fs; 60 uint sampler_unit; 61}; 62 63 64/** 65 * Subclass of draw_stage 66 */ 67struct pstip_stage 68{ 69 struct draw_stage stage; 70 71 void *sampler_cso; 72 struct pipe_texture *texture; 73 uint num_samplers; 74 uint num_textures; 75 76 /* 77 * Currently bound state 78 */ 79 struct pstip_fragment_shader *fs; 80 struct { 81 void *samplers[PIPE_MAX_SAMPLERS]; 82 struct pipe_texture *textures[PIPE_MAX_SAMPLERS]; 83 const struct pipe_poly_stipple *stipple; 84 } state; 85 86 /* 87 * Driver interface/override functions 88 */ 89 void * (*driver_create_fs_state)(struct pipe_context *, 90 const struct pipe_shader_state *); 91 void (*driver_bind_fs_state)(struct pipe_context *, void *); 92 void (*driver_delete_fs_state)(struct pipe_context *, void *); 93 94 void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, void **); 95 96 void (*driver_set_sampler_textures)(struct pipe_context *, unsigned, 97 struct pipe_texture **); 98 99 void (*driver_set_polygon_stipple)(struct pipe_context *, 100 const struct pipe_poly_stipple *); 101 102 struct pipe_context *pipe; 103}; 104 105 106 107/** 108 * Subclass of tgsi_transform_context, used for transforming the 109 * user's fragment shader to add the special AA instructions. 110 */ 111struct pstip_transform_context { 112 struct tgsi_transform_context base; 113 uint tempsUsed; /**< bitmask */ 114 int wincoordInput; 115 int maxInput; 116 uint samplersUsed; /**< bitfield of samplers used */ 117 int freeSampler; /** an available sampler for the pstipple */ 118 int texTemp; /**< temp registers */ 119 int numImmed; 120 boolean firstInstruction; 121}; 122 123 124/** 125 * TGSI declaration transform callback. 126 * Look for a free sampler, a free input attrib, and two free temp regs. 127 */ 128static void 129pstip_transform_decl(struct tgsi_transform_context *ctx, 130 struct tgsi_full_declaration *decl) 131{ 132 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 133 134 if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 135 uint i; 136 for (i = decl->Range.First; 137 i <= decl->Range.Last; i++) { 138 pctx->samplersUsed |= 1 << i; 139 } 140 } 141 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 142 pctx->maxInput = MAX2(pctx->maxInput, (int) decl->Range.Last); 143 if (decl->Semantic.Name == TGSI_SEMANTIC_POSITION) 144 pctx->wincoordInput = (int) decl->Range.First; 145 } 146 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 147 uint i; 148 for (i = decl->Range.First; 149 i <= decl->Range.Last; i++) { 150 pctx->tempsUsed |= (1 << i); 151 } 152 } 153 154 ctx->emit_declaration(ctx, decl); 155} 156 157 158static void 159pstip_transform_immed(struct tgsi_transform_context *ctx, 160 struct tgsi_full_immediate *immed) 161{ 162 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 163 pctx->numImmed++; 164} 165 166 167/** 168 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 169 */ 170static int 171free_bit(uint bitfield) 172{ 173 int i; 174 for (i = 0; i < 32; i++) { 175 if ((bitfield & (1 << i)) == 0) 176 return i; 177 } 178 return -1; 179} 180 181 182/** 183 * TGSI instruction transform callback. 184 * Replace writes to result.color w/ a temp reg. 185 * Upon END instruction, insert texture sampling code for antialiasing. 186 */ 187static void 188pstip_transform_inst(struct tgsi_transform_context *ctx, 189 struct tgsi_full_instruction *inst) 190{ 191 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 192 193 if (pctx->firstInstruction) { 194 /* emit our new declarations before the first instruction */ 195 196 struct tgsi_full_declaration decl; 197 struct tgsi_full_instruction newInst; 198 uint i; 199 int wincoordInput; 200 201 /* find free sampler */ 202 pctx->freeSampler = free_bit(pctx->samplersUsed); 203 if (pctx->freeSampler >= PIPE_MAX_SAMPLERS) 204 pctx->freeSampler = PIPE_MAX_SAMPLERS - 1; 205 206 if (pctx->wincoordInput < 0) 207 wincoordInput = pctx->maxInput + 1; 208 else 209 wincoordInput = pctx->wincoordInput; 210 211 /* find one free temp reg */ 212 for (i = 0; i < 32; i++) { 213 if ((pctx->tempsUsed & (1 << i)) == 0) { 214 /* found a free temp */ 215 if (pctx->texTemp < 0) 216 pctx->texTemp = i; 217 else 218 break; 219 } 220 } 221 assert(pctx->texTemp >= 0); 222 223 if (pctx->wincoordInput < 0) { 224 /* declare new position input reg */ 225 decl = tgsi_default_full_declaration(); 226 decl.Declaration.File = TGSI_FILE_INPUT; 227 decl.Declaration.Interpolate = TGSI_INTERPOLATE_LINEAR; /* XXX? */ 228 decl.Declaration.Semantic = 1; 229 decl.Semantic.Name = TGSI_SEMANTIC_POSITION; 230 decl.Semantic.Index = 0; 231 decl.Range.First = 232 decl.Range.Last = wincoordInput; 233 ctx->emit_declaration(ctx, &decl); 234 } 235 236 /* declare new sampler */ 237 decl = tgsi_default_full_declaration(); 238 decl.Declaration.File = TGSI_FILE_SAMPLER; 239 decl.Range.First = 240 decl.Range.Last = pctx->freeSampler; 241 ctx->emit_declaration(ctx, &decl); 242 243 /* declare new temp regs */ 244 decl = tgsi_default_full_declaration(); 245 decl.Declaration.File = TGSI_FILE_TEMPORARY; 246 decl.Range.First = 247 decl.Range.Last = pctx->texTemp; 248 ctx->emit_declaration(ctx, &decl); 249 250 /* emit immediate = {1/32, 1/32, 1, 1} 251 * The index/position of this immediate will be pctx->numImmed 252 */ 253 { 254 static const float value[4] = { 1.0/32, 1.0/32, 1.0, 1.0 }; 255 struct tgsi_full_immediate immed; 256 uint size = 4; 257 immed = tgsi_default_full_immediate(); 258 immed.Immediate.NrTokens = 1 + size; /* one for the token itself */ 259 immed.u[0].Float = value[0]; 260 immed.u[1].Float = value[1]; 261 immed.u[2].Float = value[2]; 262 immed.u[3].Float = value[3]; 263 ctx->emit_immediate(ctx, &immed); 264 } 265 266 pctx->firstInstruction = FALSE; 267 268 269 /* 270 * Insert new MUL/TEX/KILP instructions at start of program 271 * Take gl_FragCoord, divide by 32 (stipple size), sample the 272 * texture and kill fragment if needed. 273 * 274 * We'd like to use non-normalized texcoords to index into a RECT 275 * texture, but we can only use GL_REPEAT wrap mode with normalized 276 * texcoords. Darn. 277 */ 278 279 /* MUL texTemp, INPUT[wincoord], 1/32; */ 280 newInst = tgsi_default_full_instruction(); 281 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 282 newInst.Instruction.NumDstRegs = 1; 283 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 284 newInst.Dst[0].Register.Index = pctx->texTemp; 285 newInst.Instruction.NumSrcRegs = 2; 286 newInst.Src[0].Register.File = TGSI_FILE_INPUT; 287 newInst.Src[0].Register.Index = wincoordInput; 288 newInst.Src[1].Register.File = TGSI_FILE_IMMEDIATE; 289 newInst.Src[1].Register.Index = pctx->numImmed; 290 ctx->emit_instruction(ctx, &newInst); 291 292 /* TEX texTemp, texTemp, sampler; */ 293 newInst = tgsi_default_full_instruction(); 294 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 295 newInst.Instruction.NumDstRegs = 1; 296 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 297 newInst.Dst[0].Register.Index = pctx->texTemp; 298 newInst.Instruction.NumSrcRegs = 2; 299 newInst.Instruction.Texture = TRUE; 300 newInst.Texture.Texture = TGSI_TEXTURE_2D; 301 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 302 newInst.Src[0].Register.Index = pctx->texTemp; 303 newInst.Src[1].Register.File = TGSI_FILE_SAMPLER; 304 newInst.Src[1].Register.Index = pctx->freeSampler; 305 ctx->emit_instruction(ctx, &newInst); 306 307 /* KIL -texTemp; # if -texTemp < 0, KILL fragment */ 308 newInst = tgsi_default_full_instruction(); 309 newInst.Instruction.Opcode = TGSI_OPCODE_KIL; 310 newInst.Instruction.NumDstRegs = 0; 311 newInst.Instruction.NumSrcRegs = 1; 312 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 313 newInst.Src[0].Register.Index = pctx->texTemp; 314 newInst.Src[0].Register.Negate = 1; 315 ctx->emit_instruction(ctx, &newInst); 316 } 317 318 /* emit this instruction */ 319 ctx->emit_instruction(ctx, inst); 320} 321 322 323/** 324 * Generate the frag shader we'll use for doing polygon stipple. 325 * This will be the user's shader prefixed with a TEX and KIL instruction. 326 */ 327static boolean 328generate_pstip_fs(struct pstip_stage *pstip) 329{ 330 const struct pipe_shader_state *orig_fs = &pstip->fs->state; 331 /*struct draw_context *draw = pstip->stage.draw;*/ 332 struct pipe_shader_state pstip_fs; 333 struct pstip_transform_context transform; 334 335#define MAX 1000 336 337 pstip_fs = *orig_fs; /* copy to init */ 338 pstip_fs.tokens = MALLOC(sizeof(struct tgsi_token) * MAX); 339 if (pstip_fs.tokens == NULL) 340 return FALSE; 341 342 memset(&transform, 0, sizeof(transform)); 343 transform.wincoordInput = -1; 344 transform.maxInput = -1; 345 transform.texTemp = -1; 346 transform.firstInstruction = TRUE; 347 transform.base.transform_instruction = pstip_transform_inst; 348 transform.base.transform_declaration = pstip_transform_decl; 349 transform.base.transform_immediate = pstip_transform_immed; 350 351 tgsi_transform_shader(orig_fs->tokens, 352 (struct tgsi_token *) pstip_fs.tokens, 353 MAX, &transform.base); 354 355#if 0 /* DEBUG */ 356 tgsi_dump(orig_fs->tokens, 0); 357 tgsi_dump(pstip_fs.tokens, 0); 358#endif 359 360 pstip->fs->sampler_unit = transform.freeSampler; 361 assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS); 362 363 pstip->fs->pstip_fs = pstip->driver_create_fs_state(pstip->pipe, &pstip_fs); 364 365 FREE((void *)pstip_fs.tokens); 366 return TRUE; 367} 368 369 370/** 371 * Load texture image with current stipple pattern. 372 */ 373static void 374pstip_update_texture(struct pstip_stage *pstip) 375{ 376 static const uint bit31 = 1 << 31; 377 struct pipe_context *pipe = pstip->pipe; 378 struct pipe_screen *screen = pipe->screen; 379 struct pipe_transfer *transfer; 380 const uint *stipple = pstip->state.stipple->stipple; 381 uint i, j; 382 ubyte *data; 383 384 /* XXX: want to avoid flushing just because we use stipple: 385 */ 386 pipe->flush( pipe, PIPE_FLUSH_TEXTURE_CACHE, NULL ); 387 388 transfer = screen->get_tex_transfer(screen, pstip->texture, 0, 0, 0, 389 PIPE_TRANSFER_WRITE, 0, 0, 32, 32); 390 data = screen->transfer_map(screen, transfer); 391 392 /* 393 * Load alpha texture. 394 * Note: 0 means keep the fragment, 255 means kill it. 395 * We'll negate the texel value and use KILP which kills if value 396 * is negative. 397 */ 398 for (i = 0; i < 32; i++) { 399 for (j = 0; j < 32; j++) { 400 if (stipple[i] & (bit31 >> j)) { 401 /* fragment "on" */ 402 data[i * transfer->stride + j] = 0; 403 } 404 else { 405 /* fragment "off" */ 406 data[i * transfer->stride + j] = 255; 407 } 408 } 409 } 410 411 /* unmap */ 412 screen->transfer_unmap(screen, transfer); 413 screen->tex_transfer_destroy(transfer); 414} 415 416 417/** 418 * Create the texture map we'll use for stippling. 419 */ 420static boolean 421pstip_create_texture(struct pstip_stage *pstip) 422{ 423 struct pipe_context *pipe = pstip->pipe; 424 struct pipe_screen *screen = pipe->screen; 425 struct pipe_texture texTemp; 426 427 memset(&texTemp, 0, sizeof(texTemp)); 428 texTemp.target = PIPE_TEXTURE_2D; 429 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 430 texTemp.last_level = 0; 431 texTemp.width0 = 32; 432 texTemp.height0 = 32; 433 texTemp.depth0 = 1; 434 pf_get_block(texTemp.format, &texTemp.block); 435 436 pstip->texture = screen->texture_create(screen, &texTemp); 437 if (pstip->texture == NULL) 438 return FALSE; 439 440 return TRUE; 441} 442 443 444/** 445 * Create the sampler CSO that'll be used for stippling. 446 */ 447static boolean 448pstip_create_sampler(struct pstip_stage *pstip) 449{ 450 struct pipe_sampler_state sampler; 451 struct pipe_context *pipe = pstip->pipe; 452 453 memset(&sampler, 0, sizeof(sampler)); 454 sampler.wrap_s = PIPE_TEX_WRAP_REPEAT; 455 sampler.wrap_t = PIPE_TEX_WRAP_REPEAT; 456 sampler.wrap_r = PIPE_TEX_WRAP_REPEAT; 457 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 458 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 459 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 460 sampler.normalized_coords = 1; 461 sampler.min_lod = 0.0f; 462 sampler.max_lod = 0.0f; 463 464 pstip->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 465 if (pstip->sampler_cso == NULL) 466 return FALSE; 467 468 return TRUE; 469} 470 471 472/** 473 * When we're about to draw our first stipple polygon in a batch, this function 474 * is called to tell the driver to bind our modified fragment shader. 475 */ 476static boolean 477bind_pstip_fragment_shader(struct pstip_stage *pstip) 478{ 479 struct draw_context *draw = pstip->stage.draw; 480 if (!pstip->fs->pstip_fs && 481 !generate_pstip_fs(pstip)) 482 return FALSE; 483 484 draw->suspend_flushing = TRUE; 485 pstip->driver_bind_fs_state(pstip->pipe, pstip->fs->pstip_fs); 486 draw->suspend_flushing = FALSE; 487 return TRUE; 488} 489 490 491static INLINE struct pstip_stage * 492pstip_stage( struct draw_stage *stage ) 493{ 494 return (struct pstip_stage *) stage; 495} 496 497 498static void 499pstip_first_tri(struct draw_stage *stage, struct prim_header *header) 500{ 501 struct pstip_stage *pstip = pstip_stage(stage); 502 struct pipe_context *pipe = pstip->pipe; 503 struct draw_context *draw = stage->draw; 504 uint num_samplers; 505 506 assert(stage->draw->rasterizer->poly_stipple_enable); 507 508 /* bind our fragprog */ 509 if (!bind_pstip_fragment_shader(pstip)) { 510 stage->tri = draw_pipe_passthrough_tri; 511 stage->tri(stage, header); 512 return; 513 } 514 515 516 /* how many samplers? */ 517 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 518 num_samplers = MAX2(pstip->num_textures, pstip->num_samplers); 519 num_samplers = MAX2(num_samplers, pstip->fs->sampler_unit + 1); 520 521 /* plug in our sampler, texture */ 522 pstip->state.samplers[pstip->fs->sampler_unit] = pstip->sampler_cso; 523 pipe_texture_reference(&pstip->state.textures[pstip->fs->sampler_unit], 524 pstip->texture); 525 526 assert(num_samplers <= PIPE_MAX_SAMPLERS); 527 528 draw->suspend_flushing = TRUE; 529 pstip->driver_bind_sampler_states(pipe, num_samplers, pstip->state.samplers); 530 pstip->driver_set_sampler_textures(pipe, num_samplers, pstip->state.textures); 531 draw->suspend_flushing = FALSE; 532 533 /* now really draw first triangle */ 534 stage->tri = draw_pipe_passthrough_tri; 535 stage->tri(stage, header); 536} 537 538 539static void 540pstip_flush(struct draw_stage *stage, unsigned flags) 541{ 542 struct draw_context *draw = stage->draw; 543 struct pstip_stage *pstip = pstip_stage(stage); 544 struct pipe_context *pipe = pstip->pipe; 545 546 stage->tri = pstip_first_tri; 547 stage->next->flush( stage->next, flags ); 548 549 /* restore original frag shader, texture, sampler state */ 550 draw->suspend_flushing = TRUE; 551 pstip->driver_bind_fs_state(pipe, pstip->fs->driver_fs); 552 pstip->driver_bind_sampler_states(pipe, pstip->num_samplers, 553 pstip->state.samplers); 554 pstip->driver_set_sampler_textures(pipe, pstip->num_textures, 555 pstip->state.textures); 556 draw->suspend_flushing = FALSE; 557} 558 559 560static void 561pstip_reset_stipple_counter(struct draw_stage *stage) 562{ 563 stage->next->reset_stipple_counter( stage->next ); 564} 565 566 567static void 568pstip_destroy(struct draw_stage *stage) 569{ 570 struct pstip_stage *pstip = pstip_stage(stage); 571 uint i; 572 573 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 574 pipe_texture_reference(&pstip->state.textures[i], NULL); 575 } 576 577 pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso); 578 579 pipe_texture_reference(&pstip->texture, NULL); 580 581 draw_free_temp_verts( stage ); 582 FREE( stage ); 583} 584 585 586static struct pstip_stage * 587draw_pstip_stage(struct draw_context *draw) 588{ 589 struct pstip_stage *pstip = CALLOC_STRUCT(pstip_stage); 590 591 draw_alloc_temp_verts( &pstip->stage, 8 ); 592 593 pstip->stage.draw = draw; 594 pstip->stage.name = "pstip"; 595 pstip->stage.next = NULL; 596 pstip->stage.point = draw_pipe_passthrough_point; 597 pstip->stage.line = draw_pipe_passthrough_line; 598 pstip->stage.tri = pstip_first_tri; 599 pstip->stage.flush = pstip_flush; 600 pstip->stage.reset_stipple_counter = pstip_reset_stipple_counter; 601 pstip->stage.destroy = pstip_destroy; 602 603 return pstip; 604} 605 606 607static struct pstip_stage * 608pstip_stage_from_pipe(struct pipe_context *pipe) 609{ 610 struct draw_context *draw = (struct draw_context *) pipe->draw; 611 return pstip_stage(draw->pipeline.pstipple); 612} 613 614 615/** 616 * This function overrides the driver's create_fs_state() function and 617 * will typically be called by the state tracker. 618 */ 619static void * 620pstip_create_fs_state(struct pipe_context *pipe, 621 const struct pipe_shader_state *fs) 622{ 623 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 624 struct pstip_fragment_shader *aafs = CALLOC_STRUCT(pstip_fragment_shader); 625 626 if (aafs) { 627 aafs->state = *fs; 628 629 /* pass-through */ 630 aafs->driver_fs = pstip->driver_create_fs_state(pstip->pipe, fs); 631 } 632 633 return aafs; 634} 635 636 637static void 638pstip_bind_fs_state(struct pipe_context *pipe, void *fs) 639{ 640 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 641 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 642 /* save current */ 643 pstip->fs = aafs; 644 /* pass-through */ 645 pstip->driver_bind_fs_state(pstip->pipe, 646 (aafs ? aafs->driver_fs : NULL)); 647} 648 649 650static void 651pstip_delete_fs_state(struct pipe_context *pipe, void *fs) 652{ 653 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 654 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 655 /* pass-through */ 656 pstip->driver_delete_fs_state(pstip->pipe, aafs->driver_fs); 657 658 if (aafs->pstip_fs) 659 pstip->driver_delete_fs_state(pstip->pipe, aafs->pstip_fs); 660 661 FREE(aafs); 662} 663 664 665static void 666pstip_bind_sampler_states(struct pipe_context *pipe, 667 unsigned num, void **sampler) 668{ 669 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 670 uint i; 671 672 /* save current */ 673 memcpy(pstip->state.samplers, sampler, num * sizeof(void *)); 674 for (i = num; i < PIPE_MAX_SAMPLERS; i++) { 675 pstip->state.samplers[i] = NULL; 676 } 677 678 pstip->num_samplers = num; 679 /* pass-through */ 680 pstip->driver_bind_sampler_states(pstip->pipe, num, sampler); 681} 682 683 684static void 685pstip_set_sampler_textures(struct pipe_context *pipe, 686 unsigned num, struct pipe_texture **texture) 687{ 688 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 689 uint i; 690 691 /* save current */ 692 for (i = 0; i < num; i++) { 693 pipe_texture_reference(&pstip->state.textures[i], texture[i]); 694 } 695 for (; i < PIPE_MAX_SAMPLERS; i++) { 696 pipe_texture_reference(&pstip->state.textures[i], NULL); 697 } 698 699 pstip->num_textures = num; 700 701 /* pass-through */ 702 pstip->driver_set_sampler_textures(pstip->pipe, num, texture); 703} 704 705 706static void 707pstip_set_polygon_stipple(struct pipe_context *pipe, 708 const struct pipe_poly_stipple *stipple) 709{ 710 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 711 712 /* save current */ 713 pstip->state.stipple = stipple; 714 715 /* pass-through */ 716 pstip->driver_set_polygon_stipple(pstip->pipe, stipple); 717 718 pstip_update_texture(pstip); 719} 720 721 722/** 723 * Called by drivers that want to install this polygon stipple stage 724 * into the draw module's pipeline. This will not be used if the 725 * hardware has native support for polygon stipple. 726 */ 727boolean 728draw_install_pstipple_stage(struct draw_context *draw, 729 struct pipe_context *pipe) 730{ 731 struct pstip_stage *pstip; 732 733 pipe->draw = (void *) draw; 734 735 /* 736 * Create / install pgon stipple drawing / prim stage 737 */ 738 pstip = draw_pstip_stage( draw ); 739 if (pstip == NULL) 740 goto fail; 741 742 draw->pipeline.pstipple = &pstip->stage; 743 744 pstip->pipe = pipe; 745 746 /* create special texture, sampler state */ 747 if (!pstip_create_texture(pstip)) 748 goto fail; 749 750 if (!pstip_create_sampler(pstip)) 751 goto fail; 752 753 /* save original driver functions */ 754 pstip->driver_create_fs_state = pipe->create_fs_state; 755 pstip->driver_bind_fs_state = pipe->bind_fs_state; 756 pstip->driver_delete_fs_state = pipe->delete_fs_state; 757 758 pstip->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 759 pstip->driver_set_sampler_textures = pipe->set_fragment_sampler_textures; 760 pstip->driver_set_polygon_stipple = pipe->set_polygon_stipple; 761 762 /* override the driver's functions */ 763 pipe->create_fs_state = pstip_create_fs_state; 764 pipe->bind_fs_state = pstip_bind_fs_state; 765 pipe->delete_fs_state = pstip_delete_fs_state; 766 767 pipe->bind_fragment_sampler_states = pstip_bind_sampler_states; 768 pipe->set_fragment_sampler_textures = pstip_set_sampler_textures; 769 pipe->set_polygon_stipple = pstip_set_polygon_stipple; 770 771 return TRUE; 772 773 fail: 774 if (pstip) 775 pstip->stage.destroy( &pstip->stage ); 776 777 return FALSE; 778} 779