draw_pipe_pstipple.c revision 4ddd65967915ca4846f2831bc676c878a29dae4a
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_util.h" 38#include "pipe/p_inlines.h" 39#include "pipe/p_context.h" 40#include "pipe/p_defines.h" 41#include "pipe/p_shader_tokens.h" 42 43#include "tgsi/util/tgsi_transform.h" 44#include "tgsi/util/tgsi_dump.h" 45 46#include "draw_context.h" 47#include "draw_pipe.h" 48 49 50 51/** 52 * Subclass of pipe_shader_state to carry extra fragment shader info. 53 */ 54struct pstip_fragment_shader 55{ 56 struct pipe_shader_state state; 57 void *driver_fs; 58 void *pstip_fs; 59 uint sampler_unit; 60}; 61 62 63/** 64 * Subclass of draw_stage 65 */ 66struct pstip_stage 67{ 68 struct draw_stage stage; 69 70 void *sampler_cso; 71 struct pipe_texture *texture; 72 uint num_samplers; 73 uint num_textures; 74 75 /* 76 * Currently bound state 77 */ 78 struct pstip_fragment_shader *fs; 79 struct { 80 void *samplers[PIPE_MAX_SAMPLERS]; 81 struct pipe_texture *textures[PIPE_MAX_SAMPLERS]; 82 const struct pipe_poly_stipple *stipple; 83 } state; 84 85 /* 86 * Driver interface/override functions 87 */ 88 void * (*driver_create_fs_state)(struct pipe_context *, 89 const struct pipe_shader_state *); 90 void (*driver_bind_fs_state)(struct pipe_context *, void *); 91 void (*driver_delete_fs_state)(struct pipe_context *, void *); 92 93 void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, void **); 94 95 void (*driver_set_sampler_textures)(struct pipe_context *, unsigned, 96 struct pipe_texture **); 97 98 void (*driver_set_polygon_stipple)(struct pipe_context *, 99 const struct pipe_poly_stipple *); 100 101 struct pipe_context *pipe; 102}; 103 104 105 106/** 107 * Subclass of tgsi_transform_context, used for transforming the 108 * user's fragment shader to add the special AA instructions. 109 */ 110struct pstip_transform_context { 111 struct tgsi_transform_context base; 112 uint tempsUsed; /**< bitmask */ 113 int wincoordInput; 114 int maxInput; 115 uint samplersUsed; /**< bitfield of samplers used */ 116 int freeSampler; /** an available sampler for the pstipple */ 117 int texTemp; /**< temp registers */ 118 int numImmed; 119 boolean firstInstruction; 120}; 121 122 123/** 124 * TGSI declaration transform callback. 125 * Look for a free sampler, a free input attrib, and two free temp regs. 126 */ 127static void 128pstip_transform_decl(struct tgsi_transform_context *ctx, 129 struct tgsi_full_declaration *decl) 130{ 131 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 132 133 if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 134 uint i; 135 for (i = decl->DeclarationRange.First; 136 i <= decl->DeclarationRange.Last; i++) { 137 pctx->samplersUsed |= 1 << i; 138 } 139 } 140 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 141 pctx->maxInput = MAX2(pctx->maxInput, (int) decl->DeclarationRange.Last); 142 if (decl->Semantic.SemanticName == TGSI_SEMANTIC_POSITION) 143 pctx->wincoordInput = (int) decl->DeclarationRange.First; 144 } 145 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 146 uint i; 147 for (i = decl->DeclarationRange.First; 148 i <= decl->DeclarationRange.Last; i++) { 149 pctx->tempsUsed |= (1 << i); 150 } 151 } 152 153 ctx->emit_declaration(ctx, decl); 154} 155 156 157static void 158pstip_transform_immed(struct tgsi_transform_context *ctx, 159 struct tgsi_full_immediate *immed) 160{ 161 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 162 pctx->numImmed++; 163} 164 165 166/** 167 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 168 */ 169static int 170free_bit(uint bitfield) 171{ 172 int i; 173 for (i = 0; i < 32; i++) { 174 if ((bitfield & (1 << i)) == 0) 175 return i; 176 } 177 return -1; 178} 179 180 181/** 182 * TGSI instruction transform callback. 183 * Replace writes to result.color w/ a temp reg. 184 * Upon END instruction, insert texture sampling code for antialiasing. 185 */ 186static void 187pstip_transform_inst(struct tgsi_transform_context *ctx, 188 struct tgsi_full_instruction *inst) 189{ 190 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 191 192 if (pctx->firstInstruction) { 193 /* emit our new declarations before the first instruction */ 194 195 struct tgsi_full_declaration decl; 196 struct tgsi_full_instruction newInst; 197 uint i; 198 int wincoordInput; 199 200 /* find free sampler */ 201 pctx->freeSampler = free_bit(pctx->samplersUsed); 202 if (pctx->freeSampler >= PIPE_MAX_SAMPLERS) 203 pctx->freeSampler = PIPE_MAX_SAMPLERS - 1; 204 205 if (pctx->wincoordInput < 0) 206 wincoordInput = pctx->maxInput + 1; 207 else 208 wincoordInput = pctx->wincoordInput; 209 210 /* find one free temp reg */ 211 for (i = 0; i < 32; i++) { 212 if ((pctx->tempsUsed & (1 << i)) == 0) { 213 /* found a free temp */ 214 if (pctx->texTemp < 0) 215 pctx->texTemp = i; 216 else 217 break; 218 } 219 } 220 assert(pctx->texTemp >= 0); 221 222 if (pctx->wincoordInput < 0) { 223 /* declare new position input reg */ 224 decl = tgsi_default_full_declaration(); 225 decl.Declaration.File = TGSI_FILE_INPUT; 226 decl.Declaration.Interpolate = TGSI_INTERPOLATE_LINEAR; /* XXX? */ 227 decl.Declaration.Semantic = 1; 228 decl.Semantic.SemanticName = TGSI_SEMANTIC_POSITION; 229 decl.Semantic.SemanticIndex = 0; 230 decl.DeclarationRange.First = 231 decl.DeclarationRange.Last = wincoordInput; 232 ctx->emit_declaration(ctx, &decl); 233 } 234 235 /* declare new sampler */ 236 decl = tgsi_default_full_declaration(); 237 decl.Declaration.File = TGSI_FILE_SAMPLER; 238 decl.DeclarationRange.First = 239 decl.DeclarationRange.Last = pctx->freeSampler; 240 ctx->emit_declaration(ctx, &decl); 241 242 /* declare new temp regs */ 243 decl = tgsi_default_full_declaration(); 244 decl.Declaration.File = TGSI_FILE_TEMPORARY; 245 decl.DeclarationRange.First = 246 decl.DeclarationRange.Last = pctx->texTemp; 247 ctx->emit_declaration(ctx, &decl); 248 249 /* emit immediate = {1/32, 1/32, 1, 1} 250 * The index/position of this immediate will be pctx->numImmed 251 */ 252 { 253 static const float value[4] = { 1.0/32, 1.0/32, 1.0, 1.0 }; 254 struct tgsi_full_immediate immed; 255 uint size = 4; 256 immed = tgsi_default_full_immediate(); 257 immed.Immediate.Size = 1 + size; /* one for the token itself */ 258 immed.u.Pointer = (void *) value; 259 ctx->emit_immediate(ctx, &immed); 260 } 261 262 pctx->firstInstruction = FALSE; 263 264 265 /* 266 * Insert new MUL/TEX/KILP instructions at start of program 267 * Take gl_FragCoord, divide by 32 (stipple size), sample the 268 * texture and kill fragment if needed. 269 * 270 * We'd like to use non-normalized texcoords to index into a RECT 271 * texture, but we can only use GL_REPEAT wrap mode with normalized 272 * texcoords. Darn. 273 */ 274 275 /* MUL texTemp, INPUT[wincoord], 1/32; */ 276 newInst = tgsi_default_full_instruction(); 277 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 278 newInst.Instruction.NumDstRegs = 1; 279 newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY; 280 newInst.FullDstRegisters[0].DstRegister.Index = pctx->texTemp; 281 newInst.Instruction.NumSrcRegs = 2; 282 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT; 283 newInst.FullSrcRegisters[0].SrcRegister.Index = wincoordInput; 284 newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_IMMEDIATE; 285 newInst.FullSrcRegisters[1].SrcRegister.Index = pctx->numImmed; 286 ctx->emit_instruction(ctx, &newInst); 287 288 /* TEX texTemp, texTemp, sampler; */ 289 newInst = tgsi_default_full_instruction(); 290 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 291 newInst.Instruction.NumDstRegs = 1; 292 newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY; 293 newInst.FullDstRegisters[0].DstRegister.Index = pctx->texTemp; 294 newInst.Instruction.NumSrcRegs = 2; 295 newInst.InstructionExtTexture.Texture = TGSI_TEXTURE_2D; 296 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY; 297 newInst.FullSrcRegisters[0].SrcRegister.Index = pctx->texTemp; 298 newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER; 299 newInst.FullSrcRegisters[1].SrcRegister.Index = pctx->freeSampler; 300 ctx->emit_instruction(ctx, &newInst); 301 302 /* KILP texTemp; # if texTemp < 0, KILL fragment */ 303 newInst = tgsi_default_full_instruction(); 304 newInst.Instruction.Opcode = TGSI_OPCODE_KILP; 305 newInst.Instruction.NumDstRegs = 0; 306 newInst.Instruction.NumSrcRegs = 1; 307 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY; 308 newInst.FullSrcRegisters[0].SrcRegister.Index = pctx->texTemp; 309 newInst.FullSrcRegisters[0].SrcRegister.Negate = 1; 310 ctx->emit_instruction(ctx, &newInst); 311 } 312 313 /* emit this instruction */ 314 ctx->emit_instruction(ctx, inst); 315} 316 317 318/** 319 * Generate the frag shader we'll use for doing polygon stipple. 320 * This will be the user's shader prefixed with a TEX and KIL instruction. 321 */ 322static boolean 323generate_pstip_fs(struct pstip_stage *pstip) 324{ 325 const struct pipe_shader_state *orig_fs = &pstip->fs->state; 326 /*struct draw_context *draw = pstip->stage.draw;*/ 327 struct pipe_shader_state pstip_fs; 328 struct pstip_transform_context transform; 329 330#define MAX 1000 331 332 pstip_fs = *orig_fs; /* copy to init */ 333 pstip_fs.tokens = MALLOC(sizeof(struct tgsi_token) * MAX); 334 if (pstip_fs.tokens == NULL) 335 return FALSE; 336 337 memset(&transform, 0, sizeof(transform)); 338 transform.wincoordInput = -1; 339 transform.maxInput = -1; 340 transform.texTemp = -1; 341 transform.firstInstruction = TRUE; 342 transform.base.transform_instruction = pstip_transform_inst; 343 transform.base.transform_declaration = pstip_transform_decl; 344 transform.base.transform_immediate = pstip_transform_immed; 345 346 tgsi_transform_shader(orig_fs->tokens, 347 (struct tgsi_token *) pstip_fs.tokens, 348 MAX, &transform.base); 349 350#if 0 /* DEBUG */ 351 tgsi_dump(orig_fs->tokens, 0); 352 tgsi_dump(pstip_fs.tokens, 0); 353#endif 354 355 pstip->fs->sampler_unit = transform.freeSampler; 356 assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS); 357 358 pstip->fs->pstip_fs = pstip->driver_create_fs_state(pstip->pipe, &pstip_fs); 359 360 return TRUE; 361} 362 363 364/** 365 * Load texture image with current stipple pattern. 366 */ 367static void 368pstip_update_texture(struct pstip_stage *pstip) 369{ 370 static const uint bit31 = 1 << 31; 371 struct pipe_context *pipe = pstip->pipe; 372 struct pipe_screen *screen = pipe->screen; 373 struct pipe_surface *surface; 374 const uint *stipple = pstip->state.stipple->stipple; 375 uint i, j; 376 ubyte *data; 377 378 /* XXX: want to avoid flushing just because we use stipple: 379 */ 380 pipe->flush( pipe, PIPE_FLUSH_TEXTURE_CACHE, NULL ); 381 382 surface = screen->get_tex_surface(screen, pstip->texture, 0, 0, 0, 383 PIPE_BUFFER_USAGE_CPU_WRITE); 384 data = screen->surface_map(screen, surface, 385 PIPE_BUFFER_USAGE_CPU_WRITE); 386 387 /* 388 * Load alpha texture. 389 * Note: 0 means keep the fragment, 255 means kill it. 390 * We'll negate the texel value and use KILP which kills if value 391 * is negative. 392 */ 393 for (i = 0; i < 32; i++) { 394 for (j = 0; j < 32; j++) { 395 if (stipple[i] & (bit31 >> j)) { 396 /* fragment "on" */ 397 data[i * surface->stride + j] = 0; 398 } 399 else { 400 /* fragment "off" */ 401 data[i * surface->stride + j] = 255; 402 } 403 } 404 } 405 406 /* unmap */ 407 screen->surface_unmap(screen, surface); 408 screen->tex_surface_release(screen, &surface); 409} 410 411 412/** 413 * Create the texture map we'll use for stippling. 414 */ 415static boolean 416pstip_create_texture(struct pstip_stage *pstip) 417{ 418 struct pipe_context *pipe = pstip->pipe; 419 struct pipe_screen *screen = pipe->screen; 420 struct pipe_texture texTemp; 421 422 memset(&texTemp, 0, sizeof(texTemp)); 423 texTemp.target = PIPE_TEXTURE_2D; 424 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 425 texTemp.last_level = 0; 426 texTemp.width[0] = 32; 427 texTemp.height[0] = 32; 428 texTemp.depth[0] = 1; 429 pf_get_block(texTemp.format, &texTemp.block); 430 431 pstip->texture = screen->texture_create(screen, &texTemp); 432 if (pstip->texture == NULL) 433 return FALSE; 434 435 return TRUE; 436} 437 438 439/** 440 * Create the sampler CSO that'll be used for stippling. 441 */ 442static boolean 443pstip_create_sampler(struct pstip_stage *pstip) 444{ 445 struct pipe_sampler_state sampler; 446 struct pipe_context *pipe = pstip->pipe; 447 448 memset(&sampler, 0, sizeof(sampler)); 449 sampler.wrap_s = PIPE_TEX_WRAP_REPEAT; 450 sampler.wrap_t = PIPE_TEX_WRAP_REPEAT; 451 sampler.wrap_r = PIPE_TEX_WRAP_REPEAT; 452 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 453 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 454 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 455 sampler.normalized_coords = 1; 456 sampler.min_lod = 0.0f; 457 sampler.max_lod = 0.0f; 458 459 pstip->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 460 if (pstip->sampler_cso == NULL) 461 return FALSE; 462 463 return TRUE; 464} 465 466 467/** 468 * When we're about to draw our first stipple polygon in a batch, this function 469 * is called to tell the driver to bind our modified fragment shader. 470 */ 471static boolean 472bind_pstip_fragment_shader(struct pstip_stage *pstip) 473{ 474 struct draw_context *draw = pstip->stage.draw; 475 if (!pstip->fs->pstip_fs && 476 !generate_pstip_fs(pstip)) 477 return FALSE; 478 479 draw->suspend_flushing = TRUE; 480 pstip->driver_bind_fs_state(pstip->pipe, pstip->fs->pstip_fs); 481 draw->suspend_flushing = FALSE; 482 return TRUE; 483} 484 485 486static INLINE struct pstip_stage * 487pstip_stage( struct draw_stage *stage ) 488{ 489 return (struct pstip_stage *) stage; 490} 491 492 493static void 494pstip_first_tri(struct draw_stage *stage, struct prim_header *header) 495{ 496 struct pstip_stage *pstip = pstip_stage(stage); 497 struct pipe_context *pipe = pstip->pipe; 498 struct draw_context *draw = stage->draw; 499 uint num_samplers; 500 501 assert(stage->draw->rasterizer->poly_stipple_enable); 502 503 /* bind our fragprog */ 504 if (!bind_pstip_fragment_shader(pstip)) { 505 stage->tri = draw_pipe_passthrough_tri; 506 stage->tri(stage, header); 507 return; 508 } 509 510 511 /* how many samplers? */ 512 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 513 num_samplers = MAX2(pstip->num_textures, pstip->num_samplers); 514 num_samplers = MAX2(num_samplers, pstip->fs->sampler_unit + 1); 515 516 /* plug in our sampler, texture */ 517 pstip->state.samplers[pstip->fs->sampler_unit] = pstip->sampler_cso; 518 pipe_texture_reference(&pstip->state.textures[pstip->fs->sampler_unit], 519 pstip->texture); 520 521 assert(num_samplers <= PIPE_MAX_SAMPLERS); 522 523 draw->suspend_flushing = TRUE; 524 pstip->driver_bind_sampler_states(pipe, num_samplers, pstip->state.samplers); 525 pstip->driver_set_sampler_textures(pipe, num_samplers, pstip->state.textures); 526 draw->suspend_flushing = FALSE; 527 528 /* now really draw first triangle */ 529 stage->tri = draw_pipe_passthrough_tri; 530 stage->tri(stage, header); 531} 532 533 534static void 535pstip_flush(struct draw_stage *stage, unsigned flags) 536{ 537 struct draw_context *draw = stage->draw; 538 struct pstip_stage *pstip = pstip_stage(stage); 539 struct pipe_context *pipe = pstip->pipe; 540 541 stage->tri = pstip_first_tri; 542 stage->next->flush( stage->next, flags ); 543 544 /* restore original frag shader, texture, sampler state */ 545 draw->suspend_flushing = TRUE; 546 pstip->driver_bind_fs_state(pipe, pstip->fs->driver_fs); 547 pstip->driver_bind_sampler_states(pipe, pstip->num_samplers, 548 pstip->state.samplers); 549 pstip->driver_set_sampler_textures(pipe, pstip->num_textures, 550 pstip->state.textures); 551 draw->suspend_flushing = FALSE; 552} 553 554 555static void 556pstip_reset_stipple_counter(struct draw_stage *stage) 557{ 558 stage->next->reset_stipple_counter( stage->next ); 559} 560 561 562static void 563pstip_destroy(struct draw_stage *stage) 564{ 565 struct pstip_stage *pstip = pstip_stage(stage); 566 uint i; 567 568 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 569 pipe_texture_reference(&pstip->state.textures[i], NULL); 570 } 571 572 pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso); 573 574 pipe_texture_release(&pstip->texture); 575 576 draw_free_temp_verts( stage ); 577 FREE( stage ); 578} 579 580 581static struct pstip_stage * 582draw_pstip_stage(struct draw_context *draw) 583{ 584 struct pstip_stage *pstip = CALLOC_STRUCT(pstip_stage); 585 586 draw_alloc_temp_verts( &pstip->stage, 8 ); 587 588 pstip->stage.draw = draw; 589 pstip->stage.next = NULL; 590 pstip->stage.point = draw_pipe_passthrough_point; 591 pstip->stage.line = draw_pipe_passthrough_line; 592 pstip->stage.tri = pstip_first_tri; 593 pstip->stage.flush = pstip_flush; 594 pstip->stage.reset_stipple_counter = pstip_reset_stipple_counter; 595 pstip->stage.destroy = pstip_destroy; 596 597 return pstip; 598} 599 600 601static struct pstip_stage * 602pstip_stage_from_pipe(struct pipe_context *pipe) 603{ 604 struct draw_context *draw = (struct draw_context *) pipe->draw; 605 return pstip_stage(draw->pipeline.pstipple); 606} 607 608 609/** 610 * This function overrides the driver's create_fs_state() function and 611 * will typically be called by the state tracker. 612 */ 613static void * 614pstip_create_fs_state(struct pipe_context *pipe, 615 const struct pipe_shader_state *fs) 616{ 617 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 618 struct pstip_fragment_shader *aafs = CALLOC_STRUCT(pstip_fragment_shader); 619 620 if (aafs) { 621 aafs->state = *fs; 622 623 /* pass-through */ 624 aafs->driver_fs = pstip->driver_create_fs_state(pstip->pipe, fs); 625 } 626 627 return aafs; 628} 629 630 631static void 632pstip_bind_fs_state(struct pipe_context *pipe, void *fs) 633{ 634 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 635 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 636 /* save current */ 637 pstip->fs = aafs; 638 /* pass-through */ 639 pstip->driver_bind_fs_state(pstip->pipe, 640 (aafs ? aafs->driver_fs : NULL)); 641} 642 643 644static void 645pstip_delete_fs_state(struct pipe_context *pipe, void *fs) 646{ 647 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 648 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 649 /* pass-through */ 650 pstip->driver_delete_fs_state(pstip->pipe, aafs->driver_fs); 651 FREE(aafs); 652} 653 654 655static void 656pstip_bind_sampler_states(struct pipe_context *pipe, 657 unsigned num, void **sampler) 658{ 659 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 660 uint i; 661 662 /* save current */ 663 memcpy(pstip->state.samplers, sampler, num * sizeof(void *)); 664 for (i = num; i < PIPE_MAX_SAMPLERS; i++) { 665 pstip->state.samplers[i] = NULL; 666 } 667 668 pstip->num_samplers = num; 669 /* pass-through */ 670 pstip->driver_bind_sampler_states(pstip->pipe, num, sampler); 671} 672 673 674static void 675pstip_set_sampler_textures(struct pipe_context *pipe, 676 unsigned num, struct pipe_texture **texture) 677{ 678 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 679 uint i; 680 681 /* save current */ 682 for (i = 0; i < num; i++) { 683 pipe_texture_reference(&pstip->state.textures[i], texture[i]); 684 } 685 for (; i < PIPE_MAX_SAMPLERS; i++) { 686 pipe_texture_reference(&pstip->state.textures[i], NULL); 687 } 688 689 pstip->num_textures = num; 690 691 /* pass-through */ 692 pstip->driver_set_sampler_textures(pstip->pipe, num, texture); 693} 694 695 696static void 697pstip_set_polygon_stipple(struct pipe_context *pipe, 698 const struct pipe_poly_stipple *stipple) 699{ 700 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 701 702 /* save current */ 703 pstip->state.stipple = stipple; 704 705 /* pass-through */ 706 pstip->driver_set_polygon_stipple(pstip->pipe, stipple); 707 708 pstip_update_texture(pstip); 709} 710 711 712/** 713 * Called by drivers that want to install this polygon stipple stage 714 * into the draw module's pipeline. This will not be used if the 715 * hardware has native support for polygon stipple. 716 */ 717boolean 718draw_install_pstipple_stage(struct draw_context *draw, 719 struct pipe_context *pipe) 720{ 721 struct pstip_stage *pstip; 722 723 pipe->draw = (void *) draw; 724 725 /* 726 * Create / install pgon stipple drawing / prim stage 727 */ 728 pstip = draw_pstip_stage( draw ); 729 if (pstip == NULL) 730 goto fail; 731 732 draw->pipeline.pstipple = &pstip->stage; 733 734 pstip->pipe = pipe; 735 736 /* create special texture, sampler state */ 737 if (!pstip_create_texture(pstip)) 738 goto fail; 739 740 if (!pstip_create_sampler(pstip)) 741 goto fail; 742 743 /* save original driver functions */ 744 pstip->driver_create_fs_state = pipe->create_fs_state; 745 pstip->driver_bind_fs_state = pipe->bind_fs_state; 746 pstip->driver_delete_fs_state = pipe->delete_fs_state; 747 748 pstip->driver_bind_sampler_states = pipe->bind_sampler_states; 749 pstip->driver_set_sampler_textures = pipe->set_sampler_textures; 750 pstip->driver_set_polygon_stipple = pipe->set_polygon_stipple; 751 752 /* override the driver's functions */ 753 pipe->create_fs_state = pstip_create_fs_state; 754 pipe->bind_fs_state = pstip_bind_fs_state; 755 pipe->delete_fs_state = pstip_delete_fs_state; 756 757 pipe->bind_sampler_states = pstip_bind_sampler_states; 758 pipe->set_sampler_textures = pstip_set_sampler_textures; 759 pipe->set_polygon_stipple = pstip_set_polygon_stipple; 760 761 return TRUE; 762 763 fail: 764 if (pstip) 765 pstip->stage.destroy( &pstip->stage ); 766 767 return FALSE; 768} 769