draw_pipe_pstipple.c revision 87d2c77ed3861390d2250788e8b654a504a78c28
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); 368 369 if (!pstip->fs->pstip_fs) 370 return FALSE; 371 372 return TRUE; 373} 374 375 376/** 377 * Load texture image with current stipple pattern. 378 */ 379static void 380pstip_update_texture(struct pstip_stage *pstip) 381{ 382 static const uint bit31 = 1 << 31; 383 struct pipe_context *pipe = pstip->pipe; 384 struct pipe_transfer *transfer; 385 const uint *stipple = pstip->state.stipple->stipple; 386 uint i, j; 387 ubyte *data; 388 389 /* XXX: want to avoid flushing just because we use stipple: 390 * 391 * Flush should no longer be necessary if driver is properly 392 * interleaving drawing and transfers on a given context: 393 */ 394 pipe->flush( pipe, PIPE_FLUSH_TEXTURE_CACHE, NULL ); 395 396 transfer = pipe_get_transfer(pipe, pstip->texture, 0, 0, 0, 397 PIPE_TRANSFER_WRITE, 0, 0, 32, 32); 398 data = pipe->transfer_map(pipe, transfer); 399 400 /* 401 * Load alpha texture. 402 * Note: 0 means keep the fragment, 255 means kill it. 403 * We'll negate the texel value and use KILP which kills if value 404 * is negative. 405 */ 406 for (i = 0; i < 32; i++) { 407 for (j = 0; j < 32; j++) { 408 if (stipple[i] & (bit31 >> j)) { 409 /* fragment "on" */ 410 data[i * transfer->stride + j] = 0; 411 } 412 else { 413 /* fragment "off" */ 414 data[i * transfer->stride + j] = 255; 415 } 416 } 417 } 418 419 /* unmap */ 420 pipe->transfer_unmap(pipe, transfer); 421 pipe->transfer_destroy(pipe, transfer); 422} 423 424 425/** 426 * Create the texture map we'll use for stippling. 427 */ 428static boolean 429pstip_create_texture(struct pstip_stage *pstip) 430{ 431 struct pipe_context *pipe = pstip->pipe; 432 struct pipe_screen *screen = pipe->screen; 433 struct pipe_resource texTemp; 434 struct pipe_sampler_view viewTempl; 435 436 memset(&texTemp, 0, sizeof(texTemp)); 437 texTemp.target = PIPE_TEXTURE_2D; 438 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 439 texTemp.last_level = 0; 440 texTemp.width0 = 32; 441 texTemp.height0 = 32; 442 texTemp.depth0 = 1; 443 texTemp.bind = PIPE_BIND_SAMPLER_VIEW; 444 445 pstip->texture = screen->resource_create(screen, &texTemp); 446 if (pstip->texture == NULL) 447 return FALSE; 448 449 u_sampler_view_default_template(&viewTempl, 450 pstip->texture, 451 pstip->texture->format); 452 pstip->sampler_view = pipe->create_sampler_view(pipe, 453 pstip->texture, 454 &viewTempl); 455 if (!pstip->sampler_view) { 456 return FALSE; 457 } 458 459 return TRUE; 460} 461 462 463/** 464 * Create the sampler CSO that'll be used for stippling. 465 */ 466static boolean 467pstip_create_sampler(struct pstip_stage *pstip) 468{ 469 struct pipe_sampler_state sampler; 470 struct pipe_context *pipe = pstip->pipe; 471 472 memset(&sampler, 0, sizeof(sampler)); 473 sampler.wrap_s = PIPE_TEX_WRAP_REPEAT; 474 sampler.wrap_t = PIPE_TEX_WRAP_REPEAT; 475 sampler.wrap_r = PIPE_TEX_WRAP_REPEAT; 476 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 477 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 478 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 479 sampler.normalized_coords = 1; 480 sampler.min_lod = 0.0f; 481 sampler.max_lod = 0.0f; 482 483 pstip->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 484 if (pstip->sampler_cso == NULL) 485 return FALSE; 486 487 return TRUE; 488} 489 490 491/** 492 * When we're about to draw our first stipple polygon in a batch, this function 493 * is called to tell the driver to bind our modified fragment shader. 494 */ 495static boolean 496bind_pstip_fragment_shader(struct pstip_stage *pstip) 497{ 498 struct draw_context *draw = pstip->stage.draw; 499 if (!pstip->fs->pstip_fs && 500 !generate_pstip_fs(pstip)) 501 return FALSE; 502 503 draw->suspend_flushing = TRUE; 504 pstip->driver_bind_fs_state(pstip->pipe, pstip->fs->pstip_fs); 505 draw->suspend_flushing = FALSE; 506 return TRUE; 507} 508 509 510static INLINE struct pstip_stage * 511pstip_stage( struct draw_stage *stage ) 512{ 513 return (struct pstip_stage *) stage; 514} 515 516 517static void 518pstip_first_tri(struct draw_stage *stage, struct prim_header *header) 519{ 520 struct pstip_stage *pstip = pstip_stage(stage); 521 struct pipe_context *pipe = pstip->pipe; 522 struct draw_context *draw = stage->draw; 523 uint num_samplers; 524 525 assert(stage->draw->rasterizer->poly_stipple_enable); 526 527 /* bind our fragprog */ 528 if (!bind_pstip_fragment_shader(pstip)) { 529 stage->tri = draw_pipe_passthrough_tri; 530 stage->tri(stage, header); 531 return; 532 } 533 534 535 /* how many samplers? */ 536 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 537 num_samplers = MAX2(pstip->num_sampler_views, pstip->num_samplers); 538 num_samplers = MAX2(num_samplers, pstip->fs->sampler_unit + 1); 539 540 /* plug in our sampler, texture */ 541 pstip->state.samplers[pstip->fs->sampler_unit] = pstip->sampler_cso; 542 pipe_sampler_view_reference(&pstip->state.sampler_views[pstip->fs->sampler_unit], 543 pstip->sampler_view); 544 545 assert(num_samplers <= PIPE_MAX_SAMPLERS); 546 547 draw->suspend_flushing = TRUE; 548 pstip->driver_bind_sampler_states(pipe, num_samplers, pstip->state.samplers); 549 pstip->driver_set_sampler_views(pipe, num_samplers, pstip->state.sampler_views); 550 draw->suspend_flushing = FALSE; 551 552 /* now really draw first triangle */ 553 stage->tri = draw_pipe_passthrough_tri; 554 stage->tri(stage, header); 555} 556 557 558static void 559pstip_flush(struct draw_stage *stage, unsigned flags) 560{ 561 struct draw_context *draw = stage->draw; 562 struct pstip_stage *pstip = pstip_stage(stage); 563 struct pipe_context *pipe = pstip->pipe; 564 565 stage->tri = pstip_first_tri; 566 stage->next->flush( stage->next, flags ); 567 568 /* restore original frag shader, texture, sampler state */ 569 draw->suspend_flushing = TRUE; 570 pstip->driver_bind_fs_state(pipe, pstip->fs->driver_fs); 571 pstip->driver_bind_sampler_states(pipe, pstip->num_samplers, 572 pstip->state.samplers); 573 pstip->driver_set_sampler_views(pipe, 574 pstip->num_sampler_views, 575 pstip->state.sampler_views); 576 draw->suspend_flushing = FALSE; 577} 578 579 580static void 581pstip_reset_stipple_counter(struct draw_stage *stage) 582{ 583 stage->next->reset_stipple_counter( stage->next ); 584} 585 586 587static void 588pstip_destroy(struct draw_stage *stage) 589{ 590 struct pstip_stage *pstip = pstip_stage(stage); 591 uint i; 592 593 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 594 pipe_sampler_view_reference(&pstip->state.sampler_views[i], NULL); 595 } 596 597 pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso); 598 599 pipe_resource_reference(&pstip->texture, NULL); 600 601 if (pstip->sampler_view) { 602 pipe_sampler_view_reference(&pstip->sampler_view, NULL); 603 } 604 605 draw_free_temp_verts( stage ); 606 FREE( stage ); 607} 608 609 610/** Create a new polygon stipple drawing stage object */ 611static struct pstip_stage * 612draw_pstip_stage(struct draw_context *draw, struct pipe_context *pipe) 613{ 614 struct pstip_stage *pstip = CALLOC_STRUCT(pstip_stage); 615 if (pstip == NULL) 616 goto fail; 617 618 pstip->pipe = pipe; 619 620 pstip->stage.draw = draw; 621 pstip->stage.name = "pstip"; 622 pstip->stage.next = NULL; 623 pstip->stage.point = draw_pipe_passthrough_point; 624 pstip->stage.line = draw_pipe_passthrough_line; 625 pstip->stage.tri = pstip_first_tri; 626 pstip->stage.flush = pstip_flush; 627 pstip->stage.reset_stipple_counter = pstip_reset_stipple_counter; 628 pstip->stage.destroy = pstip_destroy; 629 630 if (!draw_alloc_temp_verts( &pstip->stage, 8 )) 631 goto fail; 632 633 return pstip; 634 635fail: 636 if (pstip) 637 pstip->stage.destroy( &pstip->stage ); 638 639 return NULL; 640} 641 642 643static struct pstip_stage * 644pstip_stage_from_pipe(struct pipe_context *pipe) 645{ 646 struct draw_context *draw = (struct draw_context *) pipe->draw; 647 return pstip_stage(draw->pipeline.pstipple); 648} 649 650 651/** 652 * This function overrides the driver's create_fs_state() function and 653 * will typically be called by the state tracker. 654 */ 655static void * 656pstip_create_fs_state(struct pipe_context *pipe, 657 const struct pipe_shader_state *fs) 658{ 659 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 660 struct pstip_fragment_shader *aafs = CALLOC_STRUCT(pstip_fragment_shader); 661 662 if (aafs) { 663 aafs->state = *fs; 664 665 /* pass-through */ 666 aafs->driver_fs = pstip->driver_create_fs_state(pstip->pipe, fs); 667 } 668 669 return aafs; 670} 671 672 673static void 674pstip_bind_fs_state(struct pipe_context *pipe, void *fs) 675{ 676 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 677 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 678 /* save current */ 679 pstip->fs = aafs; 680 /* pass-through */ 681 pstip->driver_bind_fs_state(pstip->pipe, 682 (aafs ? aafs->driver_fs : NULL)); 683} 684 685 686static void 687pstip_delete_fs_state(struct pipe_context *pipe, void *fs) 688{ 689 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 690 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 691 /* pass-through */ 692 pstip->driver_delete_fs_state(pstip->pipe, aafs->driver_fs); 693 694 if (aafs->pstip_fs) 695 pstip->driver_delete_fs_state(pstip->pipe, aafs->pstip_fs); 696 697 FREE(aafs); 698} 699 700 701static void 702pstip_bind_sampler_states(struct pipe_context *pipe, 703 unsigned num, void **sampler) 704{ 705 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 706 uint i; 707 708 /* save current */ 709 memcpy(pstip->state.samplers, sampler, num * sizeof(void *)); 710 for (i = num; i < PIPE_MAX_SAMPLERS; i++) { 711 pstip->state.samplers[i] = NULL; 712 } 713 714 pstip->num_samplers = num; 715 /* pass-through */ 716 pstip->driver_bind_sampler_states(pstip->pipe, num, sampler); 717} 718 719 720static void 721pstip_set_sampler_views(struct pipe_context *pipe, 722 unsigned num, 723 struct pipe_sampler_view **views) 724{ 725 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 726 uint i; 727 728 /* save current */ 729 for (i = 0; i < num; i++) { 730 pipe_sampler_view_reference(&pstip->state.sampler_views[i], views[i]); 731 } 732 for (; i < PIPE_MAX_SAMPLERS; i++) { 733 pipe_sampler_view_reference(&pstip->state.sampler_views[i], NULL); 734 } 735 736 pstip->num_sampler_views = num; 737 738 /* pass-through */ 739 pstip->driver_set_sampler_views(pstip->pipe, num, views); 740} 741 742 743static void 744pstip_set_polygon_stipple(struct pipe_context *pipe, 745 const struct pipe_poly_stipple *stipple) 746{ 747 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 748 749 /* save current */ 750 pstip->state.stipple = stipple; 751 752 /* pass-through */ 753 pstip->driver_set_polygon_stipple(pstip->pipe, stipple); 754 755 pstip_update_texture(pstip); 756} 757 758 759/** 760 * Called by drivers that want to install this polygon stipple stage 761 * into the draw module's pipeline. This will not be used if the 762 * hardware has native support for polygon stipple. 763 */ 764boolean 765draw_install_pstipple_stage(struct draw_context *draw, 766 struct pipe_context *pipe) 767{ 768 struct pstip_stage *pstip; 769 770 pipe->draw = (void *) draw; 771 772 /* 773 * Create / install pgon stipple drawing / prim stage 774 */ 775 pstip = draw_pstip_stage( draw, pipe ); 776 if (pstip == NULL) 777 goto fail; 778 779 draw->pipeline.pstipple = &pstip->stage; 780 781 /* create special texture, sampler state */ 782 if (!pstip_create_texture(pstip)) 783 goto fail; 784 785 if (!pstip_create_sampler(pstip)) 786 goto fail; 787 788 /* save original driver functions */ 789 pstip->driver_create_fs_state = pipe->create_fs_state; 790 pstip->driver_bind_fs_state = pipe->bind_fs_state; 791 pstip->driver_delete_fs_state = pipe->delete_fs_state; 792 793 pstip->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 794 pstip->driver_set_sampler_views = pipe->set_fragment_sampler_views; 795 pstip->driver_set_polygon_stipple = pipe->set_polygon_stipple; 796 797 /* override the driver's functions */ 798 pipe->create_fs_state = pstip_create_fs_state; 799 pipe->bind_fs_state = pstip_bind_fs_state; 800 pipe->delete_fs_state = pstip_delete_fs_state; 801 802 pipe->bind_fragment_sampler_states = pstip_bind_sampler_states; 803 pipe->set_fragment_sampler_views = pstip_set_sampler_views; 804 pipe->set_polygon_stipple = pstip_set_polygon_stipple; 805 806 return TRUE; 807 808 fail: 809 if (pstip) 810 pstip->stage.destroy( &pstip->stage ); 811 812 return FALSE; 813} 814