draw_pipe_pstipple.c revision 8a01cb8793485ea3bded1cc881189a0114270612
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 using the 31 * fragment window coordinate register and does a fragment kill for the 32 * stipple-failing fragments. 33 * 34 * Authors: Brian Paul 35 */ 36 37 38#include "pipe/p_context.h" 39#include "pipe/p_defines.h" 40#include "pipe/p_shader_tokens.h" 41#include "util/u_inlines.h" 42 43#include "util/u_format.h" 44#include "util/u_math.h" 45#include "util/u_memory.h" 46#include "util/u_sampler.h" 47 48#include "tgsi/tgsi_transform.h" 49#include "tgsi/tgsi_dump.h" 50 51#include "draw_context.h" 52#include "draw_pipe.h" 53 54 55/** Approx number of new tokens for instructions in pstip_transform_inst() */ 56#define NUM_NEW_TOKENS 50 57 58 59/** 60 * Subclass of pipe_shader_state to carry extra fragment shader info. 61 */ 62struct pstip_fragment_shader 63{ 64 struct pipe_shader_state state; 65 void *driver_fs; 66 void *pstip_fs; 67 uint sampler_unit; 68}; 69 70 71/** 72 * Subclass of draw_stage 73 */ 74struct pstip_stage 75{ 76 struct draw_stage stage; 77 78 void *sampler_cso; 79 struct pipe_resource *texture; 80 struct pipe_sampler_view *sampler_view; 81 uint num_samplers; 82 uint num_sampler_views; 83 84 /* 85 * Currently bound state 86 */ 87 struct pstip_fragment_shader *fs; 88 struct { 89 void *samplers[PIPE_MAX_SAMPLERS]; 90 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 91 const struct pipe_poly_stipple *stipple; 92 } state; 93 94 /* 95 * Driver interface/override functions 96 */ 97 void * (*driver_create_fs_state)(struct pipe_context *, 98 const struct pipe_shader_state *); 99 void (*driver_bind_fs_state)(struct pipe_context *, void *); 100 void (*driver_delete_fs_state)(struct pipe_context *, void *); 101 102 void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, void **); 103 104 void (*driver_set_sampler_views)(struct pipe_context *, 105 unsigned, 106 struct pipe_sampler_view **); 107 108 void (*driver_set_polygon_stipple)(struct pipe_context *, 109 const struct pipe_poly_stipple *); 110 111 struct pipe_context *pipe; 112}; 113 114 115 116/** 117 * Subclass of tgsi_transform_context, used for transforming the 118 * user's fragment shader to add the extra texture sample and fragment kill 119 * instructions. 120 */ 121struct pstip_transform_context { 122 struct tgsi_transform_context base; 123 uint tempsUsed; /**< bitmask */ 124 int wincoordInput; 125 int maxInput; 126 uint samplersUsed; /**< bitfield of samplers used */ 127 int freeSampler; /** an available sampler for the pstipple */ 128 int texTemp; /**< temp registers */ 129 int numImmed; 130 boolean firstInstruction; 131}; 132 133 134/** 135 * TGSI declaration transform callback. 136 * Look for a free sampler, a free input attrib, and two free temp regs. 137 */ 138static void 139pstip_transform_decl(struct tgsi_transform_context *ctx, 140 struct tgsi_full_declaration *decl) 141{ 142 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 143 144 if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 145 uint i; 146 for (i = decl->Range.First; 147 i <= decl->Range.Last; i++) { 148 pctx->samplersUsed |= 1 << i; 149 } 150 } 151 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 152 pctx->maxInput = MAX2(pctx->maxInput, (int) decl->Range.Last); 153 if (decl->Semantic.Name == TGSI_SEMANTIC_POSITION) 154 pctx->wincoordInput = (int) decl->Range.First; 155 } 156 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 157 uint i; 158 for (i = decl->Range.First; 159 i <= decl->Range.Last; i++) { 160 pctx->tempsUsed |= (1 << i); 161 } 162 } 163 164 ctx->emit_declaration(ctx, decl); 165} 166 167 168static void 169pstip_transform_immed(struct tgsi_transform_context *ctx, 170 struct tgsi_full_immediate *immed) 171{ 172 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 173 pctx->numImmed++; 174} 175 176 177/** 178 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 179 */ 180static int 181free_bit(uint bitfield) 182{ 183 return ffs(~bitfield) - 1; 184} 185 186 187/** 188 * TGSI instruction transform callback. 189 * Replace writes to result.color w/ a temp reg. 190 * Upon END instruction, insert texture sampling code for antialiasing. 191 */ 192static void 193pstip_transform_inst(struct tgsi_transform_context *ctx, 194 struct tgsi_full_instruction *inst) 195{ 196 struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx; 197 198 if (pctx->firstInstruction) { 199 /* emit our new declarations before the first instruction */ 200 201 struct tgsi_full_declaration decl; 202 struct tgsi_full_instruction newInst; 203 uint i; 204 int wincoordInput; 205 206 /* find free sampler */ 207 pctx->freeSampler = free_bit(pctx->samplersUsed); 208 if (pctx->freeSampler >= PIPE_MAX_SAMPLERS) 209 pctx->freeSampler = PIPE_MAX_SAMPLERS - 1; 210 211 if (pctx->wincoordInput < 0) 212 wincoordInput = pctx->maxInput + 1; 213 else 214 wincoordInput = pctx->wincoordInput; 215 216 /* find one free temp reg */ 217 for (i = 0; i < 32; i++) { 218 if ((pctx->tempsUsed & (1 << i)) == 0) { 219 /* found a free temp */ 220 if (pctx->texTemp < 0) 221 pctx->texTemp = i; 222 else 223 break; 224 } 225 } 226 assert(pctx->texTemp >= 0); 227 228 if (pctx->wincoordInput < 0) { 229 /* declare new position input reg */ 230 decl = tgsi_default_full_declaration(); 231 decl.Declaration.File = TGSI_FILE_INPUT; 232 decl.Declaration.Interpolate = TGSI_INTERPOLATE_LINEAR; /* XXX? */ 233 decl.Declaration.Semantic = 1; 234 decl.Semantic.Name = TGSI_SEMANTIC_POSITION; 235 decl.Semantic.Index = 0; 236 decl.Range.First = 237 decl.Range.Last = wincoordInput; 238 ctx->emit_declaration(ctx, &decl); 239 } 240 241 /* declare new sampler */ 242 decl = tgsi_default_full_declaration(); 243 decl.Declaration.File = TGSI_FILE_SAMPLER; 244 decl.Range.First = 245 decl.Range.Last = pctx->freeSampler; 246 ctx->emit_declaration(ctx, &decl); 247 248 /* declare new temp regs */ 249 decl = tgsi_default_full_declaration(); 250 decl.Declaration.File = TGSI_FILE_TEMPORARY; 251 decl.Range.First = 252 decl.Range.Last = pctx->texTemp; 253 ctx->emit_declaration(ctx, &decl); 254 255 /* emit immediate = {1/32, 1/32, 1, 1} 256 * The index/position of this immediate will be pctx->numImmed 257 */ 258 { 259 static const float value[4] = { 1.0/32, 1.0/32, 1.0, 1.0 }; 260 struct tgsi_full_immediate immed; 261 uint size = 4; 262 immed = tgsi_default_full_immediate(); 263 immed.Immediate.NrTokens = 1 + size; /* one for the token itself */ 264 immed.u[0].Float = value[0]; 265 immed.u[1].Float = value[1]; 266 immed.u[2].Float = value[2]; 267 immed.u[3].Float = value[3]; 268 ctx->emit_immediate(ctx, &immed); 269 } 270 271 pctx->firstInstruction = FALSE; 272 273 274 /* 275 * Insert new MUL/TEX/KILP instructions at start of program 276 * Take gl_FragCoord, divide by 32 (stipple size), sample the 277 * texture and kill fragment if needed. 278 * 279 * We'd like to use non-normalized texcoords to index into a RECT 280 * texture, but we can only use GL_REPEAT wrap mode with normalized 281 * texcoords. Darn. 282 */ 283 284 /* MUL texTemp, INPUT[wincoord], 1/32; */ 285 newInst = tgsi_default_full_instruction(); 286 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 287 newInst.Instruction.NumDstRegs = 1; 288 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 289 newInst.Dst[0].Register.Index = pctx->texTemp; 290 newInst.Instruction.NumSrcRegs = 2; 291 newInst.Src[0].Register.File = TGSI_FILE_INPUT; 292 newInst.Src[0].Register.Index = wincoordInput; 293 newInst.Src[1].Register.File = TGSI_FILE_IMMEDIATE; 294 newInst.Src[1].Register.Index = pctx->numImmed; 295 ctx->emit_instruction(ctx, &newInst); 296 297 /* TEX texTemp, texTemp, sampler; */ 298 newInst = tgsi_default_full_instruction(); 299 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 300 newInst.Instruction.NumDstRegs = 1; 301 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 302 newInst.Dst[0].Register.Index = pctx->texTemp; 303 newInst.Instruction.NumSrcRegs = 2; 304 newInst.Instruction.Texture = TRUE; 305 newInst.Texture.Texture = TGSI_TEXTURE_2D; 306 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 307 newInst.Src[0].Register.Index = pctx->texTemp; 308 newInst.Src[1].Register.File = TGSI_FILE_SAMPLER; 309 newInst.Src[1].Register.Index = pctx->freeSampler; 310 ctx->emit_instruction(ctx, &newInst); 311 312 /* KIL -texTemp; # if -texTemp < 0, KILL fragment */ 313 newInst = tgsi_default_full_instruction(); 314 newInst.Instruction.Opcode = TGSI_OPCODE_KIL; 315 newInst.Instruction.NumDstRegs = 0; 316 newInst.Instruction.NumSrcRegs = 1; 317 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 318 newInst.Src[0].Register.Index = pctx->texTemp; 319 newInst.Src[0].Register.Negate = 1; 320 ctx->emit_instruction(ctx, &newInst); 321 } 322 323 /* emit this instruction */ 324 ctx->emit_instruction(ctx, inst); 325} 326 327 328/** 329 * Generate the frag shader we'll use for doing polygon stipple. 330 * This will be the user's shader prefixed with a TEX and KIL instruction. 331 */ 332static boolean 333generate_pstip_fs(struct pstip_stage *pstip) 334{ 335 const struct pipe_shader_state *orig_fs = &pstip->fs->state; 336 /*struct draw_context *draw = pstip->stage.draw;*/ 337 struct pipe_shader_state pstip_fs; 338 struct pstip_transform_context transform; 339 const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; 340 341 pstip_fs = *orig_fs; /* copy to init */ 342 pstip_fs.tokens = tgsi_alloc_tokens(newLen); 343 if (pstip_fs.tokens == NULL) 344 return FALSE; 345 346 memset(&transform, 0, sizeof(transform)); 347 transform.wincoordInput = -1; 348 transform.maxInput = -1; 349 transform.texTemp = -1; 350 transform.firstInstruction = TRUE; 351 transform.base.transform_instruction = pstip_transform_inst; 352 transform.base.transform_declaration = pstip_transform_decl; 353 transform.base.transform_immediate = pstip_transform_immed; 354 355 tgsi_transform_shader(orig_fs->tokens, 356 (struct tgsi_token *) pstip_fs.tokens, 357 newLen, &transform.base); 358 359#if 0 /* DEBUG */ 360 tgsi_dump(orig_fs->tokens, 0); 361 tgsi_dump(pstip_fs.tokens, 0); 362#endif 363 364 pstip->fs->sampler_unit = transform.freeSampler; 365 assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS); 366 367 pstip->fs->pstip_fs = pstip->driver_create_fs_state(pstip->pipe, &pstip_fs); 368 369 FREE((void *)pstip_fs.tokens); 370 371 if (!pstip->fs->pstip_fs) 372 return FALSE; 373 374 return TRUE; 375} 376 377 378/** 379 * Load texture image with current stipple pattern. 380 */ 381static void 382pstip_update_texture(struct pstip_stage *pstip) 383{ 384 static const uint bit31 = 1 << 31; 385 struct pipe_context *pipe = pstip->pipe; 386 struct pipe_transfer *transfer; 387 const uint *stipple = pstip->state.stipple->stipple; 388 uint i, j; 389 ubyte *data; 390 391 transfer = pipe_get_transfer(pipe, pstip->texture, 0, 0, 392 PIPE_TRANSFER_WRITE, 0, 0, 32, 32); 393 data = pipe->transfer_map(pipe, transfer); 394 395 /* 396 * Load alpha texture. 397 * Note: 0 means keep the fragment, 255 means kill it. 398 * We'll negate the texel value and use KILP which kills if value 399 * is negative. 400 */ 401 for (i = 0; i < 32; i++) { 402 for (j = 0; j < 32; j++) { 403 if (stipple[i] & (bit31 >> j)) { 404 /* fragment "on" */ 405 data[i * transfer->stride + j] = 0; 406 } 407 else { 408 /* fragment "off" */ 409 data[i * transfer->stride + j] = 255; 410 } 411 } 412 } 413 414 /* unmap */ 415 pipe->transfer_unmap(pipe, transfer); 416 pipe->transfer_destroy(pipe, transfer); 417} 418 419 420/** 421 * Create the texture map we'll use for stippling. 422 */ 423static boolean 424pstip_create_texture(struct pstip_stage *pstip) 425{ 426 struct pipe_context *pipe = pstip->pipe; 427 struct pipe_screen *screen = pipe->screen; 428 struct pipe_resource texTemp; 429 struct pipe_sampler_view viewTempl; 430 431 memset(&texTemp, 0, sizeof(texTemp)); 432 texTemp.target = PIPE_TEXTURE_2D; 433 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 434 texTemp.last_level = 0; 435 texTemp.width0 = 32; 436 texTemp.height0 = 32; 437 texTemp.depth0 = 1; 438 texTemp.array_size = 1; 439 texTemp.bind = PIPE_BIND_SAMPLER_VIEW; 440 441 pstip->texture = screen->resource_create(screen, &texTemp); 442 if (pstip->texture == NULL) 443 return FALSE; 444 445 u_sampler_view_default_template(&viewTempl, 446 pstip->texture, 447 pstip->texture->format); 448 pstip->sampler_view = pipe->create_sampler_view(pipe, 449 pstip->texture, 450 &viewTempl); 451 if (!pstip->sampler_view) { 452 return FALSE; 453 } 454 455 return TRUE; 456} 457 458 459/** 460 * Create the sampler CSO that'll be used for stippling. 461 */ 462static boolean 463pstip_create_sampler(struct pstip_stage *pstip) 464{ 465 struct pipe_sampler_state sampler; 466 struct pipe_context *pipe = pstip->pipe; 467 468 memset(&sampler, 0, sizeof(sampler)); 469 sampler.wrap_s = PIPE_TEX_WRAP_REPEAT; 470 sampler.wrap_t = PIPE_TEX_WRAP_REPEAT; 471 sampler.wrap_r = PIPE_TEX_WRAP_REPEAT; 472 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; 473 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; 474 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; 475 sampler.normalized_coords = 1; 476 sampler.min_lod = 0.0f; 477 sampler.max_lod = 0.0f; 478 479 pstip->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 480 if (pstip->sampler_cso == NULL) 481 return FALSE; 482 483 return TRUE; 484} 485 486 487/** 488 * When we're about to draw our first stipple polygon in a batch, this function 489 * is called to tell the driver to bind our modified fragment shader. 490 */ 491static boolean 492bind_pstip_fragment_shader(struct pstip_stage *pstip) 493{ 494 struct draw_context *draw = pstip->stage.draw; 495 if (!pstip->fs->pstip_fs && 496 !generate_pstip_fs(pstip)) 497 return FALSE; 498 499 draw->suspend_flushing = TRUE; 500 pstip->driver_bind_fs_state(pstip->pipe, pstip->fs->pstip_fs); 501 draw->suspend_flushing = FALSE; 502 return TRUE; 503} 504 505 506static INLINE struct pstip_stage * 507pstip_stage( struct draw_stage *stage ) 508{ 509 return (struct pstip_stage *) stage; 510} 511 512 513static void 514pstip_first_tri(struct draw_stage *stage, struct prim_header *header) 515{ 516 struct pstip_stage *pstip = pstip_stage(stage); 517 struct pipe_context *pipe = pstip->pipe; 518 struct draw_context *draw = stage->draw; 519 uint num_samplers; 520 521 assert(stage->draw->rasterizer->poly_stipple_enable); 522 523 /* bind our fragprog */ 524 if (!bind_pstip_fragment_shader(pstip)) { 525 stage->tri = draw_pipe_passthrough_tri; 526 stage->tri(stage, header); 527 return; 528 } 529 530 531 /* how many samplers? */ 532 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 533 num_samplers = MAX2(pstip->num_sampler_views, pstip->num_samplers); 534 num_samplers = MAX2(num_samplers, pstip->fs->sampler_unit + 1); 535 536 /* plug in our sampler, texture */ 537 pstip->state.samplers[pstip->fs->sampler_unit] = pstip->sampler_cso; 538 pipe_sampler_view_reference(&pstip->state.sampler_views[pstip->fs->sampler_unit], 539 pstip->sampler_view); 540 541 assert(num_samplers <= PIPE_MAX_SAMPLERS); 542 543 draw->suspend_flushing = TRUE; 544 pstip->driver_bind_sampler_states(pipe, num_samplers, pstip->state.samplers); 545 pstip->driver_set_sampler_views(pipe, num_samplers, pstip->state.sampler_views); 546 draw->suspend_flushing = FALSE; 547 548 /* now really draw first triangle */ 549 stage->tri = draw_pipe_passthrough_tri; 550 stage->tri(stage, header); 551} 552 553 554static void 555pstip_flush(struct draw_stage *stage, unsigned flags) 556{ 557 struct draw_context *draw = stage->draw; 558 struct pstip_stage *pstip = pstip_stage(stage); 559 struct pipe_context *pipe = pstip->pipe; 560 561 stage->tri = pstip_first_tri; 562 stage->next->flush( stage->next, flags ); 563 564 /* restore original frag shader, texture, sampler state */ 565 draw->suspend_flushing = TRUE; 566 pstip->driver_bind_fs_state(pipe, pstip->fs->driver_fs); 567 pstip->driver_bind_sampler_states(pipe, pstip->num_samplers, 568 pstip->state.samplers); 569 pstip->driver_set_sampler_views(pipe, 570 pstip->num_sampler_views, 571 pstip->state.sampler_views); 572 draw->suspend_flushing = FALSE; 573} 574 575 576static void 577pstip_reset_stipple_counter(struct draw_stage *stage) 578{ 579 stage->next->reset_stipple_counter( stage->next ); 580} 581 582 583static void 584pstip_destroy(struct draw_stage *stage) 585{ 586 struct pstip_stage *pstip = pstip_stage(stage); 587 uint i; 588 589 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 590 pipe_sampler_view_reference(&pstip->state.sampler_views[i], NULL); 591 } 592 593 pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso); 594 595 pipe_resource_reference(&pstip->texture, NULL); 596 597 if (pstip->sampler_view) { 598 pipe_sampler_view_reference(&pstip->sampler_view, NULL); 599 } 600 601 draw_free_temp_verts( stage ); 602 FREE( stage ); 603} 604 605 606/** Create a new polygon stipple drawing stage object */ 607static struct pstip_stage * 608draw_pstip_stage(struct draw_context *draw, struct pipe_context *pipe) 609{ 610 struct pstip_stage *pstip = CALLOC_STRUCT(pstip_stage); 611 if (pstip == NULL) 612 goto fail; 613 614 pstip->pipe = pipe; 615 616 pstip->stage.draw = draw; 617 pstip->stage.name = "pstip"; 618 pstip->stage.next = NULL; 619 pstip->stage.point = draw_pipe_passthrough_point; 620 pstip->stage.line = draw_pipe_passthrough_line; 621 pstip->stage.tri = pstip_first_tri; 622 pstip->stage.flush = pstip_flush; 623 pstip->stage.reset_stipple_counter = pstip_reset_stipple_counter; 624 pstip->stage.destroy = pstip_destroy; 625 626 if (!draw_alloc_temp_verts( &pstip->stage, 8 )) 627 goto fail; 628 629 return pstip; 630 631fail: 632 if (pstip) 633 pstip->stage.destroy( &pstip->stage ); 634 635 return NULL; 636} 637 638 639static struct pstip_stage * 640pstip_stage_from_pipe(struct pipe_context *pipe) 641{ 642 struct draw_context *draw = (struct draw_context *) pipe->draw; 643 return pstip_stage(draw->pipeline.pstipple); 644} 645 646 647/** 648 * This function overrides the driver's create_fs_state() function and 649 * will typically be called by the state tracker. 650 */ 651static void * 652pstip_create_fs_state(struct pipe_context *pipe, 653 const struct pipe_shader_state *fs) 654{ 655 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 656 struct pstip_fragment_shader *pstipfs = CALLOC_STRUCT(pstip_fragment_shader); 657 658 if (pstipfs) { 659 pstipfs->state = *fs; 660 661 /* pass-through */ 662 pstipfs->driver_fs = pstip->driver_create_fs_state(pstip->pipe, fs); 663 } 664 665 return pstipfs; 666} 667 668 669static void 670pstip_bind_fs_state(struct pipe_context *pipe, void *fs) 671{ 672 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 673 struct pstip_fragment_shader *pstipfs = (struct pstip_fragment_shader *) fs; 674 /* save current */ 675 pstip->fs = pstipfs; 676 /* pass-through */ 677 pstip->driver_bind_fs_state(pstip->pipe, 678 (pstipfs ? pstipfs->driver_fs : NULL)); 679} 680 681 682static void 683pstip_delete_fs_state(struct pipe_context *pipe, void *fs) 684{ 685 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 686 struct pstip_fragment_shader *pstipfs = (struct pstip_fragment_shader *) fs; 687 /* pass-through */ 688 pstip->driver_delete_fs_state(pstip->pipe, pstipfs->driver_fs); 689 690 if (pstipfs->pstip_fs) 691 pstip->driver_delete_fs_state(pstip->pipe, pstipfs->pstip_fs); 692 693 FREE(pstipfs); 694} 695 696 697static void 698pstip_bind_sampler_states(struct pipe_context *pipe, 699 unsigned num, void **sampler) 700{ 701 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 702 uint i; 703 704 /* save current */ 705 memcpy(pstip->state.samplers, sampler, num * sizeof(void *)); 706 for (i = num; i < PIPE_MAX_SAMPLERS; i++) { 707 pstip->state.samplers[i] = NULL; 708 } 709 710 pstip->num_samplers = num; 711 /* pass-through */ 712 pstip->driver_bind_sampler_states(pstip->pipe, num, sampler); 713} 714 715 716static void 717pstip_set_sampler_views(struct pipe_context *pipe, 718 unsigned num, 719 struct pipe_sampler_view **views) 720{ 721 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 722 uint i; 723 724 /* save current */ 725 for (i = 0; i < num; i++) { 726 pipe_sampler_view_reference(&pstip->state.sampler_views[i], views[i]); 727 } 728 for (; i < PIPE_MAX_SAMPLERS; i++) { 729 pipe_sampler_view_reference(&pstip->state.sampler_views[i], NULL); 730 } 731 732 pstip->num_sampler_views = num; 733 734 /* pass-through */ 735 pstip->driver_set_sampler_views(pstip->pipe, num, views); 736} 737 738 739static void 740pstip_set_polygon_stipple(struct pipe_context *pipe, 741 const struct pipe_poly_stipple *stipple) 742{ 743 struct pstip_stage *pstip = pstip_stage_from_pipe(pipe); 744 745 /* save current */ 746 pstip->state.stipple = stipple; 747 748 /* pass-through */ 749 pstip->driver_set_polygon_stipple(pstip->pipe, stipple); 750 751 pstip_update_texture(pstip); 752} 753 754 755/** 756 * Called by drivers that want to install this polygon stipple stage 757 * into the draw module's pipeline. This will not be used if the 758 * hardware has native support for polygon stipple. 759 */ 760boolean 761draw_install_pstipple_stage(struct draw_context *draw, 762 struct pipe_context *pipe) 763{ 764 struct pstip_stage *pstip; 765 766 pipe->draw = (void *) draw; 767 768 /* 769 * Create / install pgon stipple drawing / prim stage 770 */ 771 pstip = draw_pstip_stage( draw, pipe ); 772 if (pstip == NULL) 773 goto fail; 774 775 draw->pipeline.pstipple = &pstip->stage; 776 777 /* create special texture, sampler state */ 778 if (!pstip_create_texture(pstip)) 779 goto fail; 780 781 if (!pstip_create_sampler(pstip)) 782 goto fail; 783 784 /* save original driver functions */ 785 pstip->driver_create_fs_state = pipe->create_fs_state; 786 pstip->driver_bind_fs_state = pipe->bind_fs_state; 787 pstip->driver_delete_fs_state = pipe->delete_fs_state; 788 789 pstip->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 790 pstip->driver_set_sampler_views = pipe->set_fragment_sampler_views; 791 pstip->driver_set_polygon_stipple = pipe->set_polygon_stipple; 792 793 /* override the driver's functions */ 794 pipe->create_fs_state = pstip_create_fs_state; 795 pipe->bind_fs_state = pstip_bind_fs_state; 796 pipe->delete_fs_state = pstip_delete_fs_state; 797 798 pipe->bind_fragment_sampler_states = pstip_bind_sampler_states; 799 pipe->set_fragment_sampler_views = pstip_set_sampler_views; 800 pipe->set_polygon_stipple = pstip_set_polygon_stipple; 801 802 return TRUE; 803 804 fail: 805 if (pstip) 806 pstip->stage.destroy( &pstip->stage ); 807 808 return FALSE; 809} 810