draw_pipe_pstipple.c revision 4617981ec72f7985941bee4b03c534d97ff96bc6
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_inlines.h" 38#include "pipe/p_context.h" 39#include "pipe/p_defines.h" 40#include "pipe/p_shader_tokens.h" 41 42#include "util/u_math.h" 43#include "util/u_memory.h" 44 45#include "tgsi/tgsi_transform.h" 46#include "tgsi/tgsi_dump.h" 47 48#include "draw_context.h" 49#include "draw_pipe.h" 50 51 52 53/** 54 * Subclass of pipe_shader_state to carry extra fragment shader info. 55 */ 56struct pstip_fragment_shader 57{ 58 struct pipe_shader_state state; 59 void *driver_fs; 60 void *pstip_fs; 61 uint sampler_unit; 62}; 63 64 65/** 66 * Subclass of draw_stage 67 */ 68struct pstip_stage 69{ 70 struct draw_stage stage; 71 72 void *sampler_cso; 73 struct pipe_texture *texture; 74 uint num_samplers; 75 uint num_textures; 76 77 /* 78 * Currently bound state 79 */ 80 struct pstip_fragment_shader *fs; 81 struct { 82 void *samplers[PIPE_MAX_SAMPLERS]; 83 struct pipe_texture *textures[PIPE_MAX_SAMPLERS]; 84 const struct pipe_poly_stipple *stipple; 85 } state; 86 87 /* 88 * Driver interface/override functions 89 */ 90 void * (*driver_create_fs_state)(struct pipe_context *, 91 const struct pipe_shader_state *); 92 void (*driver_bind_fs_state)(struct pipe_context *, void *); 93 void (*driver_delete_fs_state)(struct pipe_context *, void *); 94 95 void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, void **); 96 97 void (*driver_set_sampler_textures)(struct pipe_context *, unsigned, 98 struct pipe_texture **); 99 100 void (*driver_set_polygon_stipple)(struct pipe_context *, 101 const struct pipe_poly_stipple *); 102 103 struct pipe_context *pipe; 104}; 105 106 107 108/** 109 * Subclass of tgsi_transform_context, used for transforming the 110 * user's fragment shader to add the special AA instructions. 111 */ 112struct pstip_transform_context { 113 struct tgsi_transform_context base; 114 uint tempsUsed; /**< bitmask */ 115 int wincoordInput; 116 int maxInput; 117 uint samplersUsed; /**< bitfield of samplers used */ 118 int freeSampler; /** an available sampler for the pstipple */ 119 int texTemp; /**< temp registers */ 120 int numImmed; 121 boolean firstInstruction; 122}; 123 124 125/** 126 * TGSI declaration transform callback. 127 * Look for a free sampler, a free input attrib, and two free temp regs. 128 */ 129static void 130pstip_transform_decl(struct tgsi_transform_context *ctx, 131 struct tgsi_full_declaration *decl) 132{ 133 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 134 135 if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 136 uint i; 137 for (i = decl->DeclarationRange.First; 138 i <= decl->DeclarationRange.Last; i++) { 139 pctx->samplersUsed |= 1 << i; 140 } 141 } 142 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 143 pctx->maxInput = MAX2(pctx->maxInput, (int) decl->DeclarationRange.Last); 144 if (decl->Semantic.SemanticName == TGSI_SEMANTIC_POSITION) 145 pctx->wincoordInput = (int) decl->DeclarationRange.First; 146 } 147 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 148 uint i; 149 for (i = decl->DeclarationRange.First; 150 i <= decl->DeclarationRange.Last; i++) { 151 pctx->tempsUsed |= (1 << i); 152 } 153 } 154 155 ctx->emit_declaration(ctx, decl); 156} 157 158 159static void 160pstip_transform_immed(struct tgsi_transform_context *ctx, 161 struct tgsi_full_immediate *immed) 162{ 163 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 164 pctx->numImmed++; 165} 166 167 168/** 169 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 170 */ 171static int 172free_bit(uint bitfield) 173{ 174 int i; 175 for (i = 0; i < 32; i++) { 176 if ((bitfield & (1 << i)) == 0) 177 return i; 178 } 179 return -1; 180} 181 182 183/** 184 * TGSI instruction transform callback. 185 * Replace writes to result.color w/ a temp reg. 186 * Upon END instruction, insert texture sampling code for antialiasing. 187 */ 188static void 189pstip_transform_inst(struct tgsi_transform_context *ctx, 190 struct tgsi_full_instruction *inst) 191{ 192 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 193 194 if (pctx->firstInstruction) { 195 /* emit our new declarations before the first instruction */ 196 197 struct tgsi_full_declaration decl; 198 struct tgsi_full_instruction newInst; 199 uint i; 200 int wincoordInput; 201 202 /* find free sampler */ 203 pctx->freeSampler = free_bit(pctx->samplersUsed); 204 if (pctx->freeSampler >= PIPE_MAX_SAMPLERS) 205 pctx->freeSampler = PIPE_MAX_SAMPLERS - 1; 206 207 if (pctx->wincoordInput < 0) 208 wincoordInput = pctx->maxInput + 1; 209 else 210 wincoordInput = pctx->wincoordInput; 211 212 /* find one free temp reg */ 213 for (i = 0; i < 32; i++) { 214 if ((pctx->tempsUsed & (1 << i)) == 0) { 215 /* found a free temp */ 216 if (pctx->texTemp < 0) 217 pctx->texTemp = i; 218 else 219 break; 220 } 221 } 222 assert(pctx->texTemp >= 0); 223 224 if (pctx->wincoordInput < 0) { 225 /* declare new position input reg */ 226 decl = tgsi_default_full_declaration(); 227 decl.Declaration.File = TGSI_FILE_INPUT; 228 decl.Declaration.Interpolate = TGSI_INTERPOLATE_LINEAR; /* XXX? */ 229 decl.Declaration.Semantic = 1; 230 decl.Semantic.SemanticName = TGSI_SEMANTIC_POSITION; 231 decl.Semantic.SemanticIndex = 0; 232 decl.DeclarationRange.First = 233 decl.DeclarationRange.Last = wincoordInput; 234 ctx->emit_declaration(ctx, &decl); 235 } 236 237 /* declare new sampler */ 238 decl = tgsi_default_full_declaration(); 239 decl.Declaration.File = TGSI_FILE_SAMPLER; 240 decl.DeclarationRange.First = 241 decl.DeclarationRange.Last = pctx->freeSampler; 242 ctx->emit_declaration(ctx, &decl); 243 244 /* declare new temp regs */ 245 decl = tgsi_default_full_declaration(); 246 decl.Declaration.File = TGSI_FILE_TEMPORARY; 247 decl.DeclarationRange.First = 248 decl.DeclarationRange.Last = pctx->texTemp; 249 ctx->emit_declaration(ctx, &decl); 250 251 /* emit immediate = {1/32, 1/32, 1, 1} 252 * The index/position of this immediate will be pctx->numImmed 253 */ 254 { 255 static const float value[4] = { 1.0/32, 1.0/32, 1.0, 1.0 }; 256 struct tgsi_full_immediate immed; 257 uint size = 4; 258 immed = tgsi_default_full_immediate(); 259 immed.Immediate.Size = 1 + size; /* one for the token itself */ 260 immed.u.Pointer = (void *) value; 261 ctx->emit_immediate(ctx, &immed); 262 } 263 264 pctx->firstInstruction = FALSE; 265 266 267 /* 268 * Insert new MUL/TEX/KILP instructions at start of program 269 * Take gl_FragCoord, divide by 32 (stipple size), sample the 270 * texture and kill fragment if needed. 271 * 272 * We'd like to use non-normalized texcoords to index into a RECT 273 * texture, but we can only use GL_REPEAT wrap mode with normalized 274 * texcoords. Darn. 275 */ 276 277 /* MUL texTemp, INPUT[wincoord], 1/32; */ 278 newInst = tgsi_default_full_instruction(); 279 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 280 newInst.Instruction.NumDstRegs = 1; 281 newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY; 282 newInst.FullDstRegisters[0].DstRegister.Index = pctx->texTemp; 283 newInst.Instruction.NumSrcRegs = 2; 284 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT; 285 newInst.FullSrcRegisters[0].SrcRegister.Index = wincoordInput; 286 newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_IMMEDIATE; 287 newInst.FullSrcRegisters[1].SrcRegister.Index = pctx->numImmed; 288 ctx->emit_instruction(ctx, &newInst); 289 290 /* TEX texTemp, texTemp, sampler; */ 291 newInst = tgsi_default_full_instruction(); 292 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 293 newInst.Instruction.NumDstRegs = 1; 294 newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY; 295 newInst.FullDstRegisters[0].DstRegister.Index = pctx->texTemp; 296 newInst.Instruction.NumSrcRegs = 2; 297 newInst.InstructionExtTexture.Texture = TGSI_TEXTURE_2D; 298 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY; 299 newInst.FullSrcRegisters[0].SrcRegister.Index = pctx->texTemp; 300 newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER; 301 newInst.FullSrcRegisters[1].SrcRegister.Index = pctx->freeSampler; 302 ctx->emit_instruction(ctx, &newInst); 303 304 /* KIL -texTemp; # if -texTemp < 0, KILL fragment */ 305 newInst = tgsi_default_full_instruction(); 306 newInst.Instruction.Opcode = TGSI_OPCODE_KIL; 307 newInst.Instruction.NumDstRegs = 0; 308 newInst.Instruction.NumSrcRegs = 1; 309 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY; 310 newInst.FullSrcRegisters[0].SrcRegister.Index = pctx->texTemp; 311 newInst.FullSrcRegisters[0].SrcRegister.Negate = 1; 312 ctx->emit_instruction(ctx, &newInst); 313 } 314 315 /* emit this instruction */ 316 ctx->emit_instruction(ctx, inst); 317} 318 319 320/** 321 * Generate the frag shader we'll use for doing polygon stipple. 322 * This will be the user's shader prefixed with a TEX and KIL instruction. 323 */ 324static boolean 325generate_pstip_fs(struct pstip_stage *pstip) 326{ 327 const struct pipe_shader_state *orig_fs = &pstip->fs->state; 328 /*struct draw_context *draw = pstip->stage.draw;*/ 329 struct pipe_shader_state pstip_fs; 330 struct pstip_transform_context transform; 331 332#define MAX 1000 333 334 pstip_fs = *orig_fs; /* copy to init */ 335 pstip_fs.tokens = MALLOC(sizeof(struct tgsi_token) * MAX); 336 if (pstip_fs.tokens == NULL) 337 return FALSE; 338 339 memset(&transform, 0, sizeof(transform)); 340 transform.wincoordInput = -1; 341 transform.maxInput = -1; 342 transform.texTemp = -1; 343 transform.firstInstruction = TRUE; 344 transform.base.transform_instruction = pstip_transform_inst; 345 transform.base.transform_declaration = pstip_transform_decl; 346 transform.base.transform_immediate = pstip_transform_immed; 347 348 tgsi_transform_shader(orig_fs->tokens, 349 (struct tgsi_token *) pstip_fs.tokens, 350 MAX, &transform.base); 351 352#if 0 /* DEBUG */ 353 tgsi_dump(orig_fs->tokens, 0); 354 tgsi_dump(pstip_fs.tokens, 0); 355#endif 356 357 pstip->fs->sampler_unit = transform.freeSampler; 358 assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS); 359 360 pstip->fs->pstip_fs = pstip->driver_create_fs_state(pstip->pipe, &pstip_fs); 361 362 return TRUE; 363} 364 365 366/** 367 * Load texture image with current stipple pattern. 368 */ 369static void 370pstip_update_texture(struct pstip_stage *pstip) 371{ 372 static const uint bit31 = 1 << 31; 373 struct pipe_context *pipe = pstip->pipe; 374 struct pipe_screen *screen = pipe->screen; 375 struct pipe_transfer *transfer; 376 const uint *stipple = pstip->state.stipple->stipple; 377 uint i, j; 378 ubyte *data; 379 380 /* XXX: want to avoid flushing just because we use stipple: 381 */ 382 pipe->flush( pipe, PIPE_FLUSH_TEXTURE_CACHE, NULL ); 383 384 transfer = screen->get_tex_transfer(screen, pstip->texture, 0, 0, 0, 385 PIPE_TRANSFER_WRITE, 0, 0, 32, 32); 386 data = screen->transfer_map(screen, transfer); 387 388 /* 389 * Load alpha texture. 390 * Note: 0 means keep the fragment, 255 means kill it. 391 * We'll negate the texel value and use KILP which kills if value 392 * is negative. 393 */ 394 for (i = 0; i < 32; i++) { 395 for (j = 0; j < 32; j++) { 396 if (stipple[i] & (bit31 >> j)) { 397 /* fragment "on" */ 398 data[i * transfer->stride + j] = 0; 399 } 400 else { 401 /* fragment "off" */ 402 data[i * transfer->stride + j] = 255; 403 } 404 } 405 } 406 407 /* unmap */ 408 screen->transfer_unmap(screen, transfer); 409 screen->tex_transfer_release(screen, &transfer); 410} 411 412 413/** 414 * Create the texture map we'll use for stippling. 415 */ 416static boolean 417pstip_create_texture(struct pstip_stage *pstip) 418{ 419 struct pipe_context *pipe = pstip->pipe; 420 struct pipe_screen *screen = pipe->screen; 421 struct pipe_texture texTemp; 422 423 memset(&texTemp, 0, sizeof(texTemp)); 424 texTemp.target = PIPE_TEXTURE_2D; 425 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 426 texTemp.last_level = 0; 427 texTemp.width[0] = 32; 428 texTemp.height[0] = 32; 429 texTemp.depth[0] = 1; 430 pf_get_block(texTemp.format, &texTemp.block); 431 432 pstip->texture = screen->texture_create(screen, &texTemp); 433 if (pstip->texture == NULL) 434 return FALSE; 435 436 return TRUE; 437} 438 439 440/** 441 * Create the sampler CSO that'll be used for stippling. 442 */ 443static boolean 444pstip_create_sampler(struct pstip_stage *pstip) 445{ 446 struct pipe_sampler_state sampler; 447 struct pipe_context *pipe = pstip->pipe; 448 449 memset(&sampler, 0, sizeof(sampler)); 450 sampler.wrap_s = PIPE_TEX_WRAP_REPEAT; 451 sampler.wrap_t = PIPE_TEX_WRAP_REPEAT; 452 sampler.wrap_r = PIPE_TEX_WRAP_REPEAT; 453 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 454 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 455 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 456 sampler.normalized_coords = 1; 457 sampler.min_lod = 0.0f; 458 sampler.max_lod = 0.0f; 459 460 pstip->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 461 if (pstip->sampler_cso == NULL) 462 return FALSE; 463 464 return TRUE; 465} 466 467 468/** 469 * When we're about to draw our first stipple polygon in a batch, this function 470 * is called to tell the driver to bind our modified fragment shader. 471 */ 472static boolean 473bind_pstip_fragment_shader(struct pstip_stage *pstip) 474{ 475 struct draw_context *draw = pstip->stage.draw; 476 if (!pstip->fs->pstip_fs && 477 !generate_pstip_fs(pstip)) 478 return FALSE; 479 480 draw->suspend_flushing = TRUE; 481 pstip->driver_bind_fs_state(pstip->pipe, pstip->fs->pstip_fs); 482 draw->suspend_flushing = FALSE; 483 return TRUE; 484} 485 486 487static INLINE struct pstip_stage * 488pstip_stage( struct draw_stage *stage ) 489{ 490 return (struct pstip_stage *) stage; 491} 492 493 494static void 495pstip_first_tri(struct draw_stage *stage, struct prim_header *header) 496{ 497 struct pstip_stage *pstip = pstip_stage(stage); 498 struct pipe_context *pipe = pstip->pipe; 499 struct draw_context *draw = stage->draw; 500 uint num_samplers; 501 502 assert(stage->draw->rasterizer->poly_stipple_enable); 503 504 /* bind our fragprog */ 505 if (!bind_pstip_fragment_shader(pstip)) { 506 stage->tri = draw_pipe_passthrough_tri; 507 stage->tri(stage, header); 508 return; 509 } 510 511 512 /* how many samplers? */ 513 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 514 num_samplers = MAX2(pstip->num_textures, pstip->num_samplers); 515 num_samplers = MAX2(num_samplers, pstip->fs->sampler_unit + 1); 516 517 /* plug in our sampler, texture */ 518 pstip->state.samplers[pstip->fs->sampler_unit] = pstip->sampler_cso; 519 pipe_texture_reference(&pstip->state.textures[pstip->fs->sampler_unit], 520 pstip->texture); 521 522 assert(num_samplers <= PIPE_MAX_SAMPLERS); 523 524 draw->suspend_flushing = TRUE; 525 pstip->driver_bind_sampler_states(pipe, num_samplers, pstip->state.samplers); 526 pstip->driver_set_sampler_textures(pipe, num_samplers, pstip->state.textures); 527 draw->suspend_flushing = FALSE; 528 529 /* now really draw first triangle */ 530 stage->tri = draw_pipe_passthrough_tri; 531 stage->tri(stage, header); 532} 533 534 535static void 536pstip_flush(struct draw_stage *stage, unsigned flags) 537{ 538 struct draw_context *draw = stage->draw; 539 struct pstip_stage *pstip = pstip_stage(stage); 540 struct pipe_context *pipe = pstip->pipe; 541 542 stage->tri = pstip_first_tri; 543 stage->next->flush( stage->next, flags ); 544 545 /* restore original frag shader, texture, sampler state */ 546 draw->suspend_flushing = TRUE; 547 pstip->driver_bind_fs_state(pipe, pstip->fs->driver_fs); 548 pstip->driver_bind_sampler_states(pipe, pstip->num_samplers, 549 pstip->state.samplers); 550 pstip->driver_set_sampler_textures(pipe, pstip->num_textures, 551 pstip->state.textures); 552 draw->suspend_flushing = FALSE; 553} 554 555 556static void 557pstip_reset_stipple_counter(struct draw_stage *stage) 558{ 559 stage->next->reset_stipple_counter( stage->next ); 560} 561 562 563static void 564pstip_destroy(struct draw_stage *stage) 565{ 566 struct pstip_stage *pstip = pstip_stage(stage); 567 uint i; 568 569 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 570 pipe_texture_reference(&pstip->state.textures[i], NULL); 571 } 572 573 pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso); 574 575 pipe_texture_release(&pstip->texture); 576 577 draw_free_temp_verts( stage ); 578 FREE( stage ); 579} 580 581 582static struct pstip_stage * 583draw_pstip_stage(struct draw_context *draw) 584{ 585 struct pstip_stage *pstip = CALLOC_STRUCT(pstip_stage); 586 587 draw_alloc_temp_verts( &pstip->stage, 8 ); 588 589 pstip->stage.draw = draw; 590 pstip->stage.next = NULL; 591 pstip->stage.point = draw_pipe_passthrough_point; 592 pstip->stage.line = draw_pipe_passthrough_line; 593 pstip->stage.tri = pstip_first_tri; 594 pstip->stage.flush = pstip_flush; 595 pstip->stage.reset_stipple_counter = pstip_reset_stipple_counter; 596 pstip->stage.destroy = pstip_destroy; 597 598 return pstip; 599} 600 601 602static struct pstip_stage * 603pstip_stage_from_pipe(struct pipe_context *pipe) 604{ 605 struct draw_context *draw = (struct draw_context *) pipe->draw; 606 return pstip_stage(draw->pipeline.pstipple); 607} 608 609 610/** 611 * This function overrides the driver's create_fs_state() function and 612 * will typically be called by the state tracker. 613 */ 614static void * 615pstip_create_fs_state(struct pipe_context *pipe, 616 const struct pipe_shader_state *fs) 617{ 618 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 619 struct pstip_fragment_shader *aafs = CALLOC_STRUCT(pstip_fragment_shader); 620 621 if (aafs) { 622 aafs->state = *fs; 623 624 /* pass-through */ 625 aafs->driver_fs = pstip->driver_create_fs_state(pstip->pipe, fs); 626 } 627 628 return aafs; 629} 630 631 632static void 633pstip_bind_fs_state(struct pipe_context *pipe, void *fs) 634{ 635 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 636 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 637 /* save current */ 638 pstip->fs = aafs; 639 /* pass-through */ 640 pstip->driver_bind_fs_state(pstip->pipe, 641 (aafs ? aafs->driver_fs : NULL)); 642} 643 644 645static void 646pstip_delete_fs_state(struct pipe_context *pipe, void *fs) 647{ 648 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 649 struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs; 650 /* pass-through */ 651 pstip->driver_delete_fs_state(pstip->pipe, aafs->driver_fs); 652 FREE(aafs); 653} 654 655 656static void 657pstip_bind_sampler_states(struct pipe_context *pipe, 658 unsigned num, void **sampler) 659{ 660 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 661 uint i; 662 663 /* save current */ 664 memcpy(pstip->state.samplers, sampler, num * sizeof(void *)); 665 for (i = num; i < PIPE_MAX_SAMPLERS; i++) { 666 pstip->state.samplers[i] = NULL; 667 } 668 669 pstip->num_samplers = num; 670 /* pass-through */ 671 pstip->driver_bind_sampler_states(pstip->pipe, num, sampler); 672} 673 674 675static void 676pstip_set_sampler_textures(struct pipe_context *pipe, 677 unsigned num, struct pipe_texture **texture) 678{ 679 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 680 uint i; 681 682 /* save current */ 683 for (i = 0; i < num; i++) { 684 pipe_texture_reference(&pstip->state.textures[i], texture[i]); 685 } 686 for (; i < PIPE_MAX_SAMPLERS; i++) { 687 pipe_texture_reference(&pstip->state.textures[i], NULL); 688 } 689 690 pstip->num_textures = num; 691 692 /* pass-through */ 693 pstip->driver_set_sampler_textures(pstip->pipe, num, texture); 694} 695 696 697static void 698pstip_set_polygon_stipple(struct pipe_context *pipe, 699 const struct pipe_poly_stipple *stipple) 700{ 701 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 702 703 /* save current */ 704 pstip->state.stipple = stipple; 705 706 /* pass-through */ 707 pstip->driver_set_polygon_stipple(pstip->pipe, stipple); 708 709 pstip_update_texture(pstip); 710} 711 712 713/** 714 * Called by drivers that want to install this polygon stipple stage 715 * into the draw module's pipeline. This will not be used if the 716 * hardware has native support for polygon stipple. 717 */ 718boolean 719draw_install_pstipple_stage(struct draw_context *draw, 720 struct pipe_context *pipe) 721{ 722 struct pstip_stage *pstip; 723 724 pipe->draw = (void *) draw; 725 726 /* 727 * Create / install pgon stipple drawing / prim stage 728 */ 729 pstip = draw_pstip_stage( draw ); 730 if (pstip == NULL) 731 goto fail; 732 733 draw->pipeline.pstipple = &pstip->stage; 734 735 pstip->pipe = pipe; 736 737 /* create special texture, sampler state */ 738 if (!pstip_create_texture(pstip)) 739 goto fail; 740 741 if (!pstip_create_sampler(pstip)) 742 goto fail; 743 744 /* save original driver functions */ 745 pstip->driver_create_fs_state = pipe->create_fs_state; 746 pstip->driver_bind_fs_state = pipe->bind_fs_state; 747 pstip->driver_delete_fs_state = pipe->delete_fs_state; 748 749 pstip->driver_bind_sampler_states = pipe->bind_sampler_states; 750 pstip->driver_set_sampler_textures = pipe->set_sampler_textures; 751 pstip->driver_set_polygon_stipple = pipe->set_polygon_stipple; 752 753 /* override the driver's functions */ 754 pipe->create_fs_state = pstip_create_fs_state; 755 pipe->bind_fs_state = pstip_bind_fs_state; 756 pipe->delete_fs_state = pstip_delete_fs_state; 757 758 pipe->bind_sampler_states = pstip_bind_sampler_states; 759 pipe->set_sampler_textures = pstip_set_sampler_textures; 760 pipe->set_polygon_stipple = pstip_set_polygon_stipple; 761 762 return TRUE; 763 764 fail: 765 if (pstip) 766 pstip->stage.destroy( &pstip->stage ); 767 768 return FALSE; 769} 770