draw_pipe_pstipple.c revision f33c064f32bf3635becd1b2019f670abe7a35ab3
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->DeclarationRange.First; 137 i <= decl->DeclarationRange.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->DeclarationRange.Last); 143 if (decl->Semantic.SemanticName == TGSI_SEMANTIC_POSITION) 144 pctx->wincoordInput = (int) decl->DeclarationRange.First; 145 } 146 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 147 uint i; 148 for (i = decl->DeclarationRange.First; 149 i <= decl->DeclarationRange.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.SemanticName = TGSI_SEMANTIC_POSITION; 230 decl.Semantic.SemanticIndex = 0; 231 decl.DeclarationRange.First = 232 decl.DeclarationRange.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.DeclarationRange.First = 240 decl.DeclarationRange.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.DeclarationRange.First = 247 decl.DeclarationRange.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.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY; 284 newInst.FullDstRegisters[0].DstRegister.Index = pctx->texTemp; 285 newInst.Instruction.NumSrcRegs = 2; 286 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT; 287 newInst.FullSrcRegisters[0].SrcRegister.Index = wincoordInput; 288 newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_IMMEDIATE; 289 newInst.FullSrcRegisters[1].SrcRegister.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.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY; 297 newInst.FullDstRegisters[0].DstRegister.Index = pctx->texTemp; 298 newInst.Instruction.NumSrcRegs = 2; 299 newInst.InstructionExtTexture.Texture = TGSI_TEXTURE_2D; 300 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY; 301 newInst.FullSrcRegisters[0].SrcRegister.Index = pctx->texTemp; 302 newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER; 303 newInst.FullSrcRegisters[1].SrcRegister.Index = pctx->freeSampler; 304 ctx->emit_instruction(ctx, &newInst); 305 306 /* KIL -texTemp; # if -texTemp < 0, KILL fragment */ 307 newInst = tgsi_default_full_instruction(); 308 newInst.Instruction.Opcode = TGSI_OPCODE_KIL; 309 newInst.Instruction.NumDstRegs = 0; 310 newInst.Instruction.NumSrcRegs = 1; 311 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY; 312 newInst.FullSrcRegisters[0].SrcRegister.Index = pctx->texTemp; 313 newInst.FullSrcRegisters[0].SrcRegister.Negate = 1; 314 ctx->emit_instruction(ctx, &newInst); 315 } 316 317 /* emit this instruction */ 318 ctx->emit_instruction(ctx, inst); 319} 320 321 322/** 323 * Generate the frag shader we'll use for doing polygon stipple. 324 * This will be the user's shader prefixed with a TEX and KIL instruction. 325 */ 326static boolean 327generate_pstip_fs(struct pstip_stage *pstip) 328{ 329 const struct pipe_shader_state *orig_fs = &pstip->fs->state; 330 /*struct draw_context *draw = pstip->stage.draw;*/ 331 struct pipe_shader_state pstip_fs; 332 struct pstip_transform_context transform; 333 334#define MAX 1000 335 336 pstip_fs = *orig_fs; /* copy to init */ 337 pstip_fs.tokens = MALLOC(sizeof(struct tgsi_token) * MAX); 338 if (pstip_fs.tokens == NULL) 339 return FALSE; 340 341 memset(&transform, 0, sizeof(transform)); 342 transform.wincoordInput = -1; 343 transform.maxInput = -1; 344 transform.texTemp = -1; 345 transform.firstInstruction = TRUE; 346 transform.base.transform_instruction = pstip_transform_inst; 347 transform.base.transform_declaration = pstip_transform_decl; 348 transform.base.transform_immediate = pstip_transform_immed; 349 350 tgsi_transform_shader(orig_fs->tokens, 351 (struct tgsi_token *) pstip_fs.tokens, 352 MAX, &transform.base); 353 354#if 0 /* DEBUG */ 355 tgsi_dump(orig_fs->tokens, 0); 356 tgsi_dump(pstip_fs.tokens, 0); 357#endif 358 359 pstip->fs->sampler_unit = transform.freeSampler; 360 assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS); 361 362 pstip->fs->pstip_fs = pstip->driver_create_fs_state(pstip->pipe, &pstip_fs); 363 364 FREE((void *)pstip_fs.tokens); 365 return TRUE; 366} 367 368 369/** 370 * Load texture image with current stipple pattern. 371 */ 372static void 373pstip_update_texture(struct pstip_stage *pstip) 374{ 375 static const uint bit31 = 1 << 31; 376 struct pipe_context *pipe = pstip->pipe; 377 struct pipe_screen *screen = pipe->screen; 378 struct pipe_transfer *transfer; 379 const uint *stipple = pstip->state.stipple->stipple; 380 uint i, j; 381 ubyte *data; 382 383 /* XXX: want to avoid flushing just because we use stipple: 384 */ 385 pipe->flush( pipe, PIPE_FLUSH_TEXTURE_CACHE, NULL ); 386 387 transfer = screen->get_tex_transfer(screen, pstip->texture, 0, 0, 0, 388 PIPE_TRANSFER_WRITE, 0, 0, 32, 32); 389 data = screen->transfer_map(screen, transfer); 390 391 /* 392 * Load alpha texture. 393 * Note: 0 means keep the fragment, 255 means kill it. 394 * We'll negate the texel value and use KILP which kills if value 395 * is negative. 396 */ 397 for (i = 0; i < 32; i++) { 398 for (j = 0; j < 32; j++) { 399 if (stipple[i] & (bit31 >> j)) { 400 /* fragment "on" */ 401 data[i * transfer->stride + j] = 0; 402 } 403 else { 404 /* fragment "off" */ 405 data[i * transfer->stride + j] = 255; 406 } 407 } 408 } 409 410 /* unmap */ 411 screen->transfer_unmap(screen, transfer); 412 screen->tex_transfer_destroy(transfer); 413} 414 415 416/** 417 * Create the texture map we'll use for stippling. 418 */ 419static boolean 420pstip_create_texture(struct pstip_stage *pstip) 421{ 422 struct pipe_context *pipe = pstip->pipe; 423 struct pipe_screen *screen = pipe->screen; 424 struct pipe_texture texTemp; 425 426 memset(&texTemp, 0, sizeof(texTemp)); 427 texTemp.target = PIPE_TEXTURE_2D; 428 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 429 texTemp.last_level = 0; 430 texTemp.width0 = 32; 431 texTemp.height0 = 32; 432 texTemp.depth0 = 1; 433 pf_get_block(texTemp.format, &texTemp.block); 434 435 pstip->texture = screen->texture_create(screen, &texTemp); 436 if (pstip->texture == NULL) 437 return FALSE; 438 439 return TRUE; 440} 441 442 443/** 444 * Create the sampler CSO that'll be used for stippling. 445 */ 446static boolean 447pstip_create_sampler(struct pstip_stage *pstip) 448{ 449 struct pipe_sampler_state sampler; 450 struct pipe_context *pipe = pstip->pipe; 451 452 memset(&sampler, 0, sizeof(sampler)); 453 sampler.wrap_s = PIPE_TEX_WRAP_REPEAT; 454 sampler.wrap_t = PIPE_TEX_WRAP_REPEAT; 455 sampler.wrap_r = PIPE_TEX_WRAP_REPEAT; 456 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 457 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 458 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 459 sampler.normalized_coords = 1; 460 sampler.min_lod = 0.0f; 461 sampler.max_lod = 0.0f; 462 463 pstip->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 464 if (pstip->sampler_cso == NULL) 465 return FALSE; 466 467 return TRUE; 468} 469 470 471/** 472 * When we're about to draw our first stipple polygon in a batch, this function 473 * is called to tell the driver to bind our modified fragment shader. 474 */ 475static boolean 476bind_pstip_fragment_shader(struct pstip_stage *pstip) 477{ 478 struct draw_context *draw = pstip->stage.draw; 479 if (!pstip->fs->pstip_fs && 480 !generate_pstip_fs(pstip)) 481 return FALSE; 482 483 draw->suspend_flushing = TRUE; 484 pstip->driver_bind_fs_state(pstip->pipe, pstip->fs->pstip_fs); 485 draw->suspend_flushing = FALSE; 486 return TRUE; 487} 488 489 490static INLINE struct pstip_stage * 491pstip_stage( struct draw_stage *stage ) 492{ 493 return (struct pstip_stage *) stage; 494} 495 496 497static void 498pstip_first_tri(struct draw_stage *stage, struct prim_header *header) 499{ 500 struct pstip_stage *pstip = pstip_stage(stage); 501 struct pipe_context *pipe = pstip->pipe; 502 struct draw_context *draw = stage->draw; 503 uint num_samplers; 504 505 assert(stage->draw->rasterizer->poly_stipple_enable); 506 507 /* bind our fragprog */ 508 if (!bind_pstip_fragment_shader(pstip)) { 509 stage->tri = draw_pipe_passthrough_tri; 510 stage->tri(stage, header); 511 return; 512 } 513 514 515 /* how many samplers? */ 516 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 517 num_samplers = MAX2(pstip->num_textures, pstip->num_samplers); 518 num_samplers = MAX2(num_samplers, pstip->fs->sampler_unit + 1); 519 520 /* plug in our sampler, texture */ 521 pstip->state.samplers[pstip->fs->sampler_unit] = pstip->sampler_cso; 522 pipe_texture_reference(&pstip->state.textures[pstip->fs->sampler_unit], 523 pstip->texture); 524 525 assert(num_samplers <= PIPE_MAX_SAMPLERS); 526 527 draw->suspend_flushing = TRUE; 528 pstip->driver_bind_sampler_states(pipe, num_samplers, pstip->state.samplers); 529 pstip->driver_set_sampler_textures(pipe, num_samplers, pstip->state.textures); 530 draw->suspend_flushing = FALSE; 531 532 /* now really draw first triangle */ 533 stage->tri = draw_pipe_passthrough_tri; 534 stage->tri(stage, header); 535} 536 537 538static void 539pstip_flush(struct draw_stage *stage, unsigned flags) 540{ 541 struct draw_context *draw = stage->draw; 542 struct pstip_stage *pstip = pstip_stage(stage); 543 struct pipe_context *pipe = pstip->pipe; 544 545 stage->tri = pstip_first_tri; 546 stage->next->flush( stage->next, flags ); 547 548 /* restore original frag shader, texture, sampler state */ 549 draw->suspend_flushing = TRUE; 550 pstip->driver_bind_fs_state(pipe, pstip->fs->driver_fs); 551 pstip->driver_bind_sampler_states(pipe, pstip->num_samplers, 552 pstip->state.samplers); 553 pstip->driver_set_sampler_textures(pipe, pstip->num_textures, 554 pstip->state.textures); 555 draw->suspend_flushing = FALSE; 556} 557 558 559static void 560pstip_reset_stipple_counter(struct draw_stage *stage) 561{ 562 stage->next->reset_stipple_counter( stage->next ); 563} 564 565 566static void 567pstip_destroy(struct draw_stage *stage) 568{ 569 struct pstip_stage *pstip = pstip_stage(stage); 570 uint i; 571 572 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 573 pipe_texture_reference(&pstip->state.textures[i], NULL); 574 } 575 576 pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso); 577 578 pipe_texture_reference(&pstip->texture, NULL); 579 580 draw_free_temp_verts( stage ); 581 FREE( stage ); 582} 583 584 585static struct pstip_stage * 586draw_pstip_stage(struct draw_context *draw) 587{ 588 struct pstip_stage *pstip = CALLOC_STRUCT(pstip_stage); 589 590 draw_alloc_temp_verts( &pstip->stage, 8 ); 591 592 pstip->stage.draw = draw; 593 pstip->stage.name = "pstip"; 594 pstip->stage.next = NULL; 595 pstip->stage.point = draw_pipe_passthrough_point; 596 pstip->stage.line = draw_pipe_passthrough_line; 597 pstip->stage.tri = pstip_first_tri; 598 pstip->stage.flush = pstip_flush; 599 pstip->stage.reset_stipple_counter = pstip_reset_stipple_counter; 600 pstip->stage.destroy = pstip_destroy; 601 602 return pstip; 603} 604 605 606static struct pstip_stage * 607pstip_stage_from_pipe(struct pipe_context *pipe) 608{ 609 struct draw_context *draw = (struct draw_context *) pipe->draw; 610 return pstip_stage(draw->pipeline.pstipple); 611} 612 613 614/** 615 * This function overrides the driver's create_fs_state() function and 616 * will typically be called by the state tracker. 617 */ 618static void * 619pstip_create_fs_state(struct pipe_context *pipe, 620 const struct pipe_shader_state *fs) 621{ 622 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 623 struct pstip_fragment_shader *aafs = CALLOC_STRUCT(pstip_fragment_shader); 624 625 if (aafs) { 626 aafs->state = *fs; 627 628 /* pass-through */ 629 aafs->driver_fs = pstip->driver_create_fs_state(pstip->pipe, fs); 630 } 631 632 return aafs; 633} 634 635 636static void 637pstip_bind_fs_state(struct pipe_context *pipe, void *fs) 638{ 639 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 640 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 641 /* save current */ 642 pstip->fs = aafs; 643 /* pass-through */ 644 pstip->driver_bind_fs_state(pstip->pipe, 645 (aafs ? aafs->driver_fs : NULL)); 646} 647 648 649static void 650pstip_delete_fs_state(struct pipe_context *pipe, void *fs) 651{ 652 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 653 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 654 /* pass-through */ 655 pstip->driver_delete_fs_state(pstip->pipe, aafs->driver_fs); 656 657 if (aafs->pstip_fs) 658 pstip->driver_delete_fs_state(pstip->pipe, aafs->pstip_fs); 659 660 FREE(aafs); 661} 662 663 664static void 665pstip_bind_sampler_states(struct pipe_context *pipe, 666 unsigned num, void **sampler) 667{ 668 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 669 uint i; 670 671 /* save current */ 672 memcpy(pstip->state.samplers, sampler, num * sizeof(void *)); 673 for (i = num; i < PIPE_MAX_SAMPLERS; i++) { 674 pstip->state.samplers[i] = NULL; 675 } 676 677 pstip->num_samplers = num; 678 /* pass-through */ 679 pstip->driver_bind_sampler_states(pstip->pipe, num, sampler); 680} 681 682 683static void 684pstip_set_sampler_textures(struct pipe_context *pipe, 685 unsigned num, struct pipe_texture **texture) 686{ 687 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 688 uint i; 689 690 /* save current */ 691 for (i = 0; i < num; i++) { 692 pipe_texture_reference(&pstip->state.textures[i], texture[i]); 693 } 694 for (; i < PIPE_MAX_SAMPLERS; i++) { 695 pipe_texture_reference(&pstip->state.textures[i], NULL); 696 } 697 698 pstip->num_textures = num; 699 700 /* pass-through */ 701 pstip->driver_set_sampler_textures(pstip->pipe, num, texture); 702} 703 704 705static void 706pstip_set_polygon_stipple(struct pipe_context *pipe, 707 const struct pipe_poly_stipple *stipple) 708{ 709 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 710 711 /* save current */ 712 pstip->state.stipple = stipple; 713 714 /* pass-through */ 715 pstip->driver_set_polygon_stipple(pstip->pipe, stipple); 716 717 pstip_update_texture(pstip); 718} 719 720 721/** 722 * Called by drivers that want to install this polygon stipple stage 723 * into the draw module's pipeline. This will not be used if the 724 * hardware has native support for polygon stipple. 725 */ 726boolean 727draw_install_pstipple_stage(struct draw_context *draw, 728 struct pipe_context *pipe) 729{ 730 struct pstip_stage *pstip; 731 732 pipe->draw = (void *) draw; 733 734 /* 735 * Create / install pgon stipple drawing / prim stage 736 */ 737 pstip = draw_pstip_stage( draw ); 738 if (pstip == NULL) 739 goto fail; 740 741 draw->pipeline.pstipple = &pstip->stage; 742 743 pstip->pipe = pipe; 744 745 /* create special texture, sampler state */ 746 if (!pstip_create_texture(pstip)) 747 goto fail; 748 749 if (!pstip_create_sampler(pstip)) 750 goto fail; 751 752 /* save original driver functions */ 753 pstip->driver_create_fs_state = pipe->create_fs_state; 754 pstip->driver_bind_fs_state = pipe->bind_fs_state; 755 pstip->driver_delete_fs_state = pipe->delete_fs_state; 756 757 pstip->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 758 pstip->driver_set_sampler_textures = pipe->set_fragment_sampler_textures; 759 pstip->driver_set_polygon_stipple = pipe->set_polygon_stipple; 760 761 /* override the driver's functions */ 762 pipe->create_fs_state = pstip_create_fs_state; 763 pipe->bind_fs_state = pstip_bind_fs_state; 764 pipe->delete_fs_state = pstip_delete_fs_state; 765 766 pipe->bind_fragment_sampler_states = pstip_bind_sampler_states; 767 pipe->set_fragment_sampler_textures = pstip_set_sampler_textures; 768 pipe->set_polygon_stipple = pstip_set_polygon_stipple; 769 770 return TRUE; 771 772 fail: 773 if (pstip) 774 pstip->stage.destroy( &pstip->stage ); 775 776 return FALSE; 777} 778