draw_pipe_aaline.c revision edb19707951306447daef43c1ea3cacec5f211fb
1/************************************************************************** 2 * 3 * Copyright 2007 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 * AA line stage: AA lines are converted to texture mapped triangles. 30 * 31 * Authors: Brian Paul 32 */ 33 34 35#include "pipe/p_context.h" 36#include "pipe/p_defines.h" 37#include "pipe/p_shader_tokens.h" 38#include "util/u_inlines.h" 39 40#include "util/u_format.h" 41#include "util/u_math.h" 42#include "util/u_memory.h" 43#include "util/u_sampler.h" 44 45#include "tgsi/tgsi_transform.h" 46#include "tgsi/tgsi_dump.h" 47 48#include "draw_context.h" 49#include "draw_private.h" 50#include "draw_pipe.h" 51 52 53/** Approx number of new tokens for instructions in aa_transform_inst() */ 54#define NUM_NEW_TOKENS 50 55 56 57/** 58 * Size for the alpha texture used for antialiasing 59 */ 60#define TEXTURE_SIZE_LOG2 5 /* 32 x 32 */ 61 62/** 63 * Max texture level for the alpha texture used for antialiasing 64 * 65 * Don't use the 1x1 and 2x2 mipmap levels. 66 */ 67#define MAX_TEXTURE_LEVEL (TEXTURE_SIZE_LOG2 - 2) 68 69 70/** 71 * Subclass of pipe_shader_state to carry extra fragment shader info. 72 */ 73struct aaline_fragment_shader 74{ 75 struct pipe_shader_state state; 76 void *driver_fs; 77 void *aaline_fs; 78 uint sampler_unit; 79 int generic_attrib; /**< texcoord/generic used for texture */ 80}; 81 82 83/** 84 * Subclass of draw_stage 85 */ 86struct aaline_stage 87{ 88 struct draw_stage stage; 89 90 float half_line_width; 91 92 /** For AA lines, this is the vertex attrib slot for the new texcoords */ 93 uint tex_slot; 94 /** position, not necessarily output zero */ 95 uint pos_slot; 96 97 void *sampler_cso; 98 struct pipe_resource *texture; 99 struct pipe_sampler_view *sampler_view; 100 uint num_samplers; 101 uint num_sampler_views; 102 103 104 /* 105 * Currently bound state 106 */ 107 struct aaline_fragment_shader *fs; 108 struct { 109 void *sampler[PIPE_MAX_SAMPLERS]; 110 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 111 } state; 112 113 /* 114 * Driver interface/override functions 115 */ 116 void * (*driver_create_fs_state)(struct pipe_context *, 117 const struct pipe_shader_state *); 118 void (*driver_bind_fs_state)(struct pipe_context *, void *); 119 void (*driver_delete_fs_state)(struct pipe_context *, void *); 120 121 void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, 122 void **); 123 124 void (*driver_set_sampler_views)(struct pipe_context *, 125 unsigned, 126 struct pipe_sampler_view **); 127}; 128 129 130 131/** 132 * Subclass of tgsi_transform_context, used for transforming the 133 * user's fragment shader to add the special AA instructions. 134 */ 135struct aa_transform_context { 136 struct tgsi_transform_context base; 137 uint tempsUsed; /**< bitmask */ 138 int colorOutput; /**< which output is the primary color */ 139 uint samplersUsed; /**< bitfield of samplers used */ 140 int freeSampler; /** an available sampler for the pstipple */ 141 int maxInput, maxGeneric; /**< max input index found */ 142 int colorTemp, texTemp; /**< temp registers */ 143 boolean firstInstruction; 144}; 145 146 147/** 148 * TGSI declaration transform callback. 149 * Look for a free sampler, a free input attrib, and two free temp regs. 150 */ 151static void 152aa_transform_decl(struct tgsi_transform_context *ctx, 153 struct tgsi_full_declaration *decl) 154{ 155 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 156 157 if (decl->Declaration.File == TGSI_FILE_OUTPUT && 158 decl->Semantic.Name == TGSI_SEMANTIC_COLOR && 159 decl->Semantic.Index == 0) { 160 aactx->colorOutput = decl->Range.First; 161 } 162 else if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 163 uint i; 164 for (i = decl->Range.First; 165 i <= decl->Range.Last; i++) { 166 aactx->samplersUsed |= 1 << i; 167 } 168 } 169 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 170 if ((int) decl->Range.Last > aactx->maxInput) 171 aactx->maxInput = decl->Range.Last; 172 if (decl->Semantic.Name == TGSI_SEMANTIC_GENERIC && 173 (int) decl->Semantic.Index > aactx->maxGeneric) { 174 aactx->maxGeneric = decl->Semantic.Index; 175 } 176 } 177 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 178 uint i; 179 for (i = decl->Range.First; 180 i <= decl->Range.Last; i++) { 181 aactx->tempsUsed |= (1 << i); 182 } 183 } 184 185 ctx->emit_declaration(ctx, decl); 186} 187 188 189/** 190 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 191 */ 192static int 193free_bit(uint bitfield) 194{ 195 return ffs(~bitfield) - 1; 196} 197 198 199/** 200 * TGSI instruction transform callback. 201 * Replace writes to result.color w/ a temp reg. 202 * Upon END instruction, insert texture sampling code for antialiasing. 203 */ 204static void 205aa_transform_inst(struct tgsi_transform_context *ctx, 206 struct tgsi_full_instruction *inst) 207{ 208 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 209 210 if (aactx->firstInstruction) { 211 /* emit our new declarations before the first instruction */ 212 213 struct tgsi_full_declaration decl; 214 uint i; 215 216 /* find free sampler */ 217 aactx->freeSampler = free_bit(aactx->samplersUsed); 218 if (aactx->freeSampler >= PIPE_MAX_SAMPLERS) 219 aactx->freeSampler = PIPE_MAX_SAMPLERS - 1; 220 221 /* find two free temp regs */ 222 for (i = 0; i < 32; i++) { 223 if ((aactx->tempsUsed & (1 << i)) == 0) { 224 /* found a free temp */ 225 if (aactx->colorTemp < 0) 226 aactx->colorTemp = i; 227 else if (aactx->texTemp < 0) 228 aactx->texTemp = i; 229 else 230 break; 231 } 232 } 233 assert(aactx->colorTemp >= 0); 234 assert(aactx->texTemp >= 0); 235 236 /* declare new generic input/texcoord */ 237 decl = tgsi_default_full_declaration(); 238 decl.Declaration.File = TGSI_FILE_INPUT; 239 /* XXX this could be linear... */ 240 decl.Declaration.Interpolate = TGSI_INTERPOLATE_PERSPECTIVE; 241 decl.Declaration.Semantic = 1; 242 decl.Semantic.Name = TGSI_SEMANTIC_GENERIC; 243 decl.Semantic.Index = aactx->maxGeneric + 1; 244 decl.Range.First = 245 decl.Range.Last = aactx->maxInput + 1; 246 ctx->emit_declaration(ctx, &decl); 247 248 /* declare new sampler */ 249 decl = tgsi_default_full_declaration(); 250 decl.Declaration.File = TGSI_FILE_SAMPLER; 251 decl.Range.First = 252 decl.Range.Last = aactx->freeSampler; 253 ctx->emit_declaration(ctx, &decl); 254 255 /* declare new temp regs */ 256 decl = tgsi_default_full_declaration(); 257 decl.Declaration.File = TGSI_FILE_TEMPORARY; 258 decl.Range.First = 259 decl.Range.Last = aactx->texTemp; 260 ctx->emit_declaration(ctx, &decl); 261 262 decl = tgsi_default_full_declaration(); 263 decl.Declaration.File = TGSI_FILE_TEMPORARY; 264 decl.Range.First = 265 decl.Range.Last = aactx->colorTemp; 266 ctx->emit_declaration(ctx, &decl); 267 268 aactx->firstInstruction = FALSE; 269 } 270 271 if (inst->Instruction.Opcode == TGSI_OPCODE_END && 272 aactx->colorOutput != -1) { 273 struct tgsi_full_instruction newInst; 274 275 /* TEX */ 276 newInst = tgsi_default_full_instruction(); 277 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 278 newInst.Instruction.NumDstRegs = 1; 279 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 280 newInst.Dst[0].Register.Index = aactx->texTemp; 281 newInst.Instruction.NumSrcRegs = 2; 282 newInst.Instruction.Texture = TRUE; 283 newInst.Texture.Texture = TGSI_TEXTURE_2D; 284 newInst.Src[0].Register.File = TGSI_FILE_INPUT; 285 newInst.Src[0].Register.Index = aactx->maxInput + 1; 286 newInst.Src[1].Register.File = TGSI_FILE_SAMPLER; 287 newInst.Src[1].Register.Index = aactx->freeSampler; 288 289 ctx->emit_instruction(ctx, &newInst); 290 291 /* MOV rgb */ 292 newInst = tgsi_default_full_instruction(); 293 newInst.Instruction.Opcode = TGSI_OPCODE_MOV; 294 newInst.Instruction.NumDstRegs = 1; 295 newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; 296 newInst.Dst[0].Register.Index = aactx->colorOutput; 297 newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZ; 298 newInst.Instruction.NumSrcRegs = 1; 299 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 300 newInst.Src[0].Register.Index = aactx->colorTemp; 301 ctx->emit_instruction(ctx, &newInst); 302 303 /* MUL alpha */ 304 newInst = tgsi_default_full_instruction(); 305 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 306 newInst.Instruction.NumDstRegs = 1; 307 newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; 308 newInst.Dst[0].Register.Index = aactx->colorOutput; 309 newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_W; 310 newInst.Instruction.NumSrcRegs = 2; 311 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 312 newInst.Src[0].Register.Index = aactx->colorTemp; 313 newInst.Src[1].Register.File = TGSI_FILE_TEMPORARY; 314 newInst.Src[1].Register.Index = aactx->texTemp; 315 ctx->emit_instruction(ctx, &newInst); 316 317 /* END */ 318 newInst = tgsi_default_full_instruction(); 319 newInst.Instruction.Opcode = TGSI_OPCODE_END; 320 newInst.Instruction.NumDstRegs = 0; 321 newInst.Instruction.NumSrcRegs = 0; 322 ctx->emit_instruction(ctx, &newInst); 323 } 324 else { 325 /* Not an END instruction. 326 * Look for writes to result.color and replace with colorTemp reg. 327 */ 328 uint i; 329 330 for (i = 0; i < inst->Instruction.NumDstRegs; i++) { 331 struct tgsi_full_dst_register *dst = &inst->Dst[i]; 332 if (dst->Register.File == TGSI_FILE_OUTPUT && 333 dst->Register.Index == aactx->colorOutput) { 334 dst->Register.File = TGSI_FILE_TEMPORARY; 335 dst->Register.Index = aactx->colorTemp; 336 } 337 } 338 339 ctx->emit_instruction(ctx, inst); 340 } 341} 342 343 344/** 345 * Generate the frag shader we'll use for drawing AA lines. 346 * This will be the user's shader plus some texture/modulate instructions. 347 */ 348static boolean 349generate_aaline_fs(struct aaline_stage *aaline) 350{ 351 struct pipe_context *pipe = aaline->stage.draw->pipe; 352 const struct pipe_shader_state *orig_fs = &aaline->fs->state; 353 struct pipe_shader_state aaline_fs; 354 struct aa_transform_context transform; 355 const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; 356 357 aaline_fs = *orig_fs; /* copy to init */ 358 aaline_fs.tokens = tgsi_alloc_tokens(newLen); 359 if (aaline_fs.tokens == NULL) 360 return FALSE; 361 362 memset(&transform, 0, sizeof(transform)); 363 transform.colorOutput = -1; 364 transform.maxInput = -1; 365 transform.maxGeneric = -1; 366 transform.colorTemp = -1; 367 transform.texTemp = -1; 368 transform.firstInstruction = TRUE; 369 transform.base.transform_instruction = aa_transform_inst; 370 transform.base.transform_declaration = aa_transform_decl; 371 372 tgsi_transform_shader(orig_fs->tokens, 373 (struct tgsi_token *) aaline_fs.tokens, 374 newLen, &transform.base); 375 376#if 0 /* DEBUG */ 377 debug_printf("draw_aaline, orig shader:\n"); 378 tgsi_dump(orig_fs->tokens, 0); 379 debug_printf("draw_aaline, new shader:\n"); 380 tgsi_dump(aaline_fs.tokens, 0); 381#endif 382 383 aaline->fs->sampler_unit = transform.freeSampler; 384 385 aaline->fs->aaline_fs = aaline->driver_create_fs_state(pipe, &aaline_fs); 386 if (aaline->fs->aaline_fs == NULL) 387 goto fail; 388 389 aaline->fs->generic_attrib = transform.maxGeneric + 1; 390 FREE((void *)aaline_fs.tokens); 391 return TRUE; 392 393fail: 394 FREE((void *)aaline_fs.tokens); 395 return FALSE; 396} 397 398 399/** 400 * Create the texture map we'll use for antialiasing the lines. 401 */ 402static boolean 403aaline_create_texture(struct aaline_stage *aaline) 404{ 405 struct pipe_context *pipe = aaline->stage.draw->pipe; 406 struct pipe_screen *screen = pipe->screen; 407 struct pipe_resource texTemp; 408 struct pipe_sampler_view viewTempl; 409 uint level; 410 411 memset(&texTemp, 0, sizeof(texTemp)); 412 texTemp.target = PIPE_TEXTURE_2D; 413 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 414 texTemp.last_level = MAX_TEXTURE_LEVEL; 415 texTemp.width0 = 1 << TEXTURE_SIZE_LOG2; 416 texTemp.height0 = 1 << TEXTURE_SIZE_LOG2; 417 texTemp.depth0 = 1; 418 texTemp.array_size = 1; 419 texTemp.bind = PIPE_BIND_SAMPLER_VIEW; 420 421 aaline->texture = screen->resource_create(screen, &texTemp); 422 if (!aaline->texture) 423 return FALSE; 424 425 u_sampler_view_default_template(&viewTempl, 426 aaline->texture, 427 aaline->texture->format); 428 aaline->sampler_view = pipe->create_sampler_view(pipe, 429 aaline->texture, 430 &viewTempl); 431 if (!aaline->sampler_view) { 432 return FALSE; 433 } 434 435 /* Fill in mipmap images. 436 * Basically each level is solid opaque, except for the outermost 437 * texels which are zero. Special case the 1x1 and 2x2 levels 438 * (though, those levels shouldn't be used - see the max_lod setting). 439 */ 440 for (level = 0; level <= MAX_TEXTURE_LEVEL; level++) { 441 struct pipe_transfer *transfer; 442 struct pipe_box box; 443 const uint size = u_minify(aaline->texture->width0, level); 444 ubyte *data; 445 uint i, j; 446 447 assert(aaline->texture->width0 == aaline->texture->height0); 448 449 u_box_origin_2d( size, size, &box ); 450 451 /* This texture is new, no need to flush. 452 */ 453 transfer = pipe->get_transfer(pipe, 454 aaline->texture, 455 level, 456 PIPE_TRANSFER_WRITE, 457 &box); 458 459 data = pipe->transfer_map(pipe, transfer); 460 if (data == NULL) 461 return FALSE; 462 463 for (i = 0; i < size; i++) { 464 for (j = 0; j < size; j++) { 465 ubyte d; 466 if (size == 1) { 467 d = 255; 468 } 469 else if (size == 2) { 470 d = 200; /* tuneable */ 471 } 472 else if (i == 0 || j == 0 || i == size - 1 || j == size - 1) { 473 d = 35; /* edge texel */ 474 } 475 else { 476 d = 255; 477 } 478 data[i * transfer->stride + j] = d; 479 } 480 } 481 482 /* unmap */ 483 pipe->transfer_unmap(pipe, transfer); 484 pipe->transfer_destroy(pipe, transfer); 485 } 486 return TRUE; 487} 488 489 490/** 491 * Create the sampler CSO that'll be used for antialiasing. 492 * By using a mipmapped texture, we don't have to generate a different 493 * texture image for each line size. 494 */ 495static boolean 496aaline_create_sampler(struct aaline_stage *aaline) 497{ 498 struct pipe_sampler_state sampler; 499 struct pipe_context *pipe = aaline->stage.draw->pipe; 500 501 memset(&sampler, 0, sizeof(sampler)); 502 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 503 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 504 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 505 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_LINEAR; 506 sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR; 507 sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR; 508 sampler.normalized_coords = 1; 509 sampler.min_lod = 0.0f; 510 sampler.max_lod = MAX_TEXTURE_LEVEL; 511 512 aaline->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 513 if (aaline->sampler_cso == NULL) 514 return FALSE; 515 516 return TRUE; 517} 518 519 520/** 521 * When we're about to draw our first AA line in a batch, this function is 522 * called to tell the driver to bind our modified fragment shader. 523 */ 524static boolean 525bind_aaline_fragment_shader(struct aaline_stage *aaline) 526{ 527 struct draw_context *draw = aaline->stage.draw; 528 struct pipe_context *pipe = draw->pipe; 529 530 if (!aaline->fs->aaline_fs && 531 !generate_aaline_fs(aaline)) 532 return FALSE; 533 534 draw->suspend_flushing = TRUE; 535 aaline->driver_bind_fs_state(pipe, aaline->fs->aaline_fs); 536 draw->suspend_flushing = FALSE; 537 538 return TRUE; 539} 540 541 542 543static INLINE struct aaline_stage * 544aaline_stage( struct draw_stage *stage ) 545{ 546 return (struct aaline_stage *) stage; 547} 548 549 550/** 551 * Draw a wide line by drawing a quad, using geometry which will 552 * fullfill GL's antialiased line requirements. 553 */ 554static void 555aaline_line(struct draw_stage *stage, struct prim_header *header) 556{ 557 const struct aaline_stage *aaline = aaline_stage(stage); 558 const float half_width = aaline->half_line_width; 559 struct prim_header tri; 560 struct vertex_header *v[8]; 561 uint texPos = aaline->tex_slot; 562 uint posPos = aaline->pos_slot; 563 float *pos, *tex; 564 float dx = header->v[1]->data[posPos][0] - header->v[0]->data[posPos][0]; 565 float dy = header->v[1]->data[posPos][1] - header->v[0]->data[posPos][1]; 566 double a = atan2(dy, dx); 567 float c_a = (float) cos(a), s_a = (float) sin(a); 568 uint i; 569 570 /* XXX the ends of lines aren't quite perfect yet, but probably passable */ 571 dx = 0.5F * half_width; 572 dy = half_width; 573 574 /* allocate/dup new verts */ 575 for (i = 0; i < 8; i++) { 576 v[i] = dup_vert(stage, header->v[i/4], i); 577 } 578 579 /* 580 * Quad strip for line from v0 to v1 (*=endpoints): 581 * 582 * 1 3 5 7 583 * +---+---------------------+---+ 584 * | | 585 * | *v0 v1* | 586 * | | 587 * +---+---------------------+---+ 588 * 0 2 4 6 589 */ 590 591 /* new verts */ 592 pos = v[0]->data[posPos]; 593 pos[0] += (-dx * c_a - dy * s_a); 594 pos[1] += (-dx * s_a + dy * c_a); 595 596 pos = v[1]->data[posPos]; 597 pos[0] += (-dx * c_a - -dy * s_a); 598 pos[1] += (-dx * s_a + -dy * c_a); 599 600 pos = v[2]->data[posPos]; 601 pos[0] += ( dx * c_a - dy * s_a); 602 pos[1] += ( dx * s_a + dy * c_a); 603 604 pos = v[3]->data[posPos]; 605 pos[0] += ( dx * c_a - -dy * s_a); 606 pos[1] += ( dx * s_a + -dy * c_a); 607 608 pos = v[4]->data[posPos]; 609 pos[0] += (-dx * c_a - dy * s_a); 610 pos[1] += (-dx * s_a + dy * c_a); 611 612 pos = v[5]->data[posPos]; 613 pos[0] += (-dx * c_a - -dy * s_a); 614 pos[1] += (-dx * s_a + -dy * c_a); 615 616 pos = v[6]->data[posPos]; 617 pos[0] += ( dx * c_a - dy * s_a); 618 pos[1] += ( dx * s_a + dy * c_a); 619 620 pos = v[7]->data[posPos]; 621 pos[0] += ( dx * c_a - -dy * s_a); 622 pos[1] += ( dx * s_a + -dy * c_a); 623 624 /* new texcoords */ 625 tex = v[0]->data[texPos]; 626 ASSIGN_4V(tex, 0, 0, 0, 1); 627 628 tex = v[1]->data[texPos]; 629 ASSIGN_4V(tex, 0, 1, 0, 1); 630 631 tex = v[2]->data[texPos]; 632 ASSIGN_4V(tex, .5, 0, 0, 1); 633 634 tex = v[3]->data[texPos]; 635 ASSIGN_4V(tex, .5, 1, 0, 1); 636 637 tex = v[4]->data[texPos]; 638 ASSIGN_4V(tex, .5, 0, 0, 1); 639 640 tex = v[5]->data[texPos]; 641 ASSIGN_4V(tex, .5, 1, 0, 1); 642 643 tex = v[6]->data[texPos]; 644 ASSIGN_4V(tex, 1, 0, 0, 1); 645 646 tex = v[7]->data[texPos]; 647 ASSIGN_4V(tex, 1, 1, 0, 1); 648 649 /* emit 6 tris for the quad strip */ 650 tri.v[0] = v[2]; tri.v[1] = v[1]; tri.v[2] = v[0]; 651 stage->next->tri( stage->next, &tri ); 652 653 tri.v[0] = v[3]; tri.v[1] = v[1]; tri.v[2] = v[2]; 654 stage->next->tri( stage->next, &tri ); 655 656 tri.v[0] = v[4]; tri.v[1] = v[3]; tri.v[2] = v[2]; 657 stage->next->tri( stage->next, &tri ); 658 659 tri.v[0] = v[5]; tri.v[1] = v[3]; tri.v[2] = v[4]; 660 stage->next->tri( stage->next, &tri ); 661 662 tri.v[0] = v[6]; tri.v[1] = v[5]; tri.v[2] = v[4]; 663 stage->next->tri( stage->next, &tri ); 664 665 tri.v[0] = v[7]; tri.v[1] = v[5]; tri.v[2] = v[6]; 666 stage->next->tri( stage->next, &tri ); 667} 668 669 670static void 671aaline_first_line(struct draw_stage *stage, struct prim_header *header) 672{ 673 auto struct aaline_stage *aaline = aaline_stage(stage); 674 struct draw_context *draw = stage->draw; 675 struct pipe_context *pipe = draw->pipe; 676 const struct pipe_rasterizer_state *rast = draw->rasterizer; 677 uint num_samplers; 678 void *r; 679 680 assert(draw->rasterizer->line_smooth); 681 682 if (draw->rasterizer->line_width <= 2.2) 683 aaline->half_line_width = 1.1f; 684 else 685 aaline->half_line_width = 0.5f * draw->rasterizer->line_width; 686 687 /* 688 * Bind (generate) our fragprog, sampler and texture 689 */ 690 if (!bind_aaline_fragment_shader(aaline)) { 691 stage->line = draw_pipe_passthrough_line; 692 stage->line(stage, header); 693 return; 694 } 695 696 /* update vertex attrib info */ 697 aaline->pos_slot = draw_current_shader_position_output(draw);; 698 699 /* allocate the extra post-transformed vertex attribute */ 700 aaline->tex_slot = draw_alloc_extra_vertex_attrib(draw, 701 TGSI_SEMANTIC_GENERIC, 702 aaline->fs->generic_attrib); 703 704 /* how many samplers? */ 705 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 706 num_samplers = MAX2(aaline->num_sampler_views, aaline->num_samplers); 707 num_samplers = MAX2(num_samplers, aaline->fs->sampler_unit + 1); 708 709 aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso; 710 pipe_sampler_view_reference(&aaline->state.sampler_views[aaline->fs->sampler_unit], 711 aaline->sampler_view); 712 713 draw->suspend_flushing = TRUE; 714 aaline->driver_bind_sampler_states(pipe, num_samplers, aaline->state.sampler); 715 aaline->driver_set_sampler_views(pipe, num_samplers, aaline->state.sampler_views); 716 717 /* Disable triangle culling, stippling, unfilled mode etc. */ 718 r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade); 719 pipe->bind_rasterizer_state(pipe, r); 720 721 draw->suspend_flushing = FALSE; 722 723 /* now really draw first line */ 724 stage->line = aaline_line; 725 stage->line(stage, header); 726} 727 728 729static void 730aaline_flush(struct draw_stage *stage, unsigned flags) 731{ 732 struct draw_context *draw = stage->draw; 733 struct aaline_stage *aaline = aaline_stage(stage); 734 struct pipe_context *pipe = draw->pipe; 735 736 stage->line = aaline_first_line; 737 stage->next->flush( stage->next, flags ); 738 739 /* restore original frag shader, texture, sampler state */ 740 draw->suspend_flushing = TRUE; 741 aaline->driver_bind_fs_state(pipe, aaline->fs ? aaline->fs->driver_fs : NULL); 742 aaline->driver_bind_sampler_states(pipe, aaline->num_samplers, 743 aaline->state.sampler); 744 aaline->driver_set_sampler_views(pipe, 745 aaline->num_sampler_views, 746 aaline->state.sampler_views); 747 748 /* restore original rasterizer state */ 749 if (draw->rast_handle) { 750 pipe->bind_rasterizer_state(pipe, draw->rast_handle); 751 } 752 753 draw->suspend_flushing = FALSE; 754 755 draw_remove_extra_vertex_attribs(draw); 756} 757 758 759static void 760aaline_reset_stipple_counter(struct draw_stage *stage) 761{ 762 stage->next->reset_stipple_counter( stage->next ); 763} 764 765 766static void 767aaline_destroy(struct draw_stage *stage) 768{ 769 struct aaline_stage *aaline = aaline_stage(stage); 770 struct pipe_context *pipe = stage->draw->pipe; 771 uint i; 772 773 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 774 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 775 } 776 777 if (aaline->sampler_cso) 778 pipe->delete_sampler_state(pipe, aaline->sampler_cso); 779 780 if (aaline->texture) 781 pipe_resource_reference(&aaline->texture, NULL); 782 783 if (aaline->sampler_view) { 784 pipe_sampler_view_reference(&aaline->sampler_view, NULL); 785 } 786 787 draw_free_temp_verts( stage ); 788 789 /* restore the old entry points */ 790 pipe->create_fs_state = aaline->driver_create_fs_state; 791 pipe->bind_fs_state = aaline->driver_bind_fs_state; 792 pipe->delete_fs_state = aaline->driver_delete_fs_state; 793 794 pipe->bind_fragment_sampler_states = aaline->driver_bind_sampler_states; 795 pipe->set_fragment_sampler_views = aaline->driver_set_sampler_views; 796 797 FREE( stage ); 798} 799 800 801static struct aaline_stage * 802draw_aaline_stage(struct draw_context *draw) 803{ 804 struct aaline_stage *aaline = CALLOC_STRUCT(aaline_stage); 805 if (aaline == NULL) 806 return NULL; 807 808 aaline->stage.draw = draw; 809 aaline->stage.name = "aaline"; 810 aaline->stage.next = NULL; 811 aaline->stage.point = draw_pipe_passthrough_point; 812 aaline->stage.line = aaline_first_line; 813 aaline->stage.tri = draw_pipe_passthrough_tri; 814 aaline->stage.flush = aaline_flush; 815 aaline->stage.reset_stipple_counter = aaline_reset_stipple_counter; 816 aaline->stage.destroy = aaline_destroy; 817 818 if (!draw_alloc_temp_verts( &aaline->stage, 8 )) 819 goto fail; 820 821 return aaline; 822 823 fail: 824 if (aaline) 825 aaline->stage.destroy(&aaline->stage); 826 827 return NULL; 828} 829 830 831static struct aaline_stage * 832aaline_stage_from_pipe(struct pipe_context *pipe) 833{ 834 struct draw_context *draw = (struct draw_context *) pipe->draw; 835 return aaline_stage(draw->pipeline.aaline); 836} 837 838 839/** 840 * This function overrides the driver's create_fs_state() function and 841 * will typically be called by the state tracker. 842 */ 843static void * 844aaline_create_fs_state(struct pipe_context *pipe, 845 const struct pipe_shader_state *fs) 846{ 847 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 848 struct aaline_fragment_shader *aafs = CALLOC_STRUCT(aaline_fragment_shader); 849 850 if (aafs == NULL) 851 return NULL; 852 853 aafs->state.tokens = tgsi_dup_tokens(fs->tokens); 854 855 /* pass-through */ 856 aafs->driver_fs = aaline->driver_create_fs_state(pipe, fs); 857 858 return aafs; 859} 860 861 862static void 863aaline_bind_fs_state(struct pipe_context *pipe, void *fs) 864{ 865 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 866 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 867 868 /* save current */ 869 aaline->fs = aafs; 870 /* pass-through */ 871 aaline->driver_bind_fs_state(pipe, (aafs ? aafs->driver_fs : NULL)); 872} 873 874 875static void 876aaline_delete_fs_state(struct pipe_context *pipe, void *fs) 877{ 878 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 879 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 880 881 /* pass-through */ 882 aaline->driver_delete_fs_state(pipe, aafs->driver_fs); 883 884 if (aafs->aaline_fs) 885 aaline->driver_delete_fs_state(pipe, aafs->aaline_fs); 886 887 FREE((void*)aafs->state.tokens); 888 889 FREE(aafs); 890} 891 892 893static void 894aaline_bind_sampler_states(struct pipe_context *pipe, 895 unsigned num, void **sampler) 896{ 897 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 898 899 /* save current */ 900 memcpy(aaline->state.sampler, sampler, num * sizeof(void *)); 901 aaline->num_samplers = num; 902 903 /* pass-through */ 904 aaline->driver_bind_sampler_states(pipe, num, sampler); 905} 906 907 908static void 909aaline_set_sampler_views(struct pipe_context *pipe, 910 unsigned num, 911 struct pipe_sampler_view **views) 912{ 913 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 914 uint i; 915 916 /* save current */ 917 for (i = 0; i < num; i++) { 918 pipe_sampler_view_reference(&aaline->state.sampler_views[i], views[i]); 919 } 920 for ( ; i < PIPE_MAX_SAMPLERS; i++) { 921 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 922 } 923 aaline->num_sampler_views = num; 924 925 /* pass-through */ 926 aaline->driver_set_sampler_views(pipe, num, views); 927} 928 929 930/** 931 * Called by drivers that want to install this AA line prim stage 932 * into the draw module's pipeline. This will not be used if the 933 * hardware has native support for AA lines. 934 */ 935boolean 936draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe) 937{ 938 struct aaline_stage *aaline; 939 940 pipe->draw = (void *) draw; 941 942 /* 943 * Create / install AA line drawing / prim stage 944 */ 945 aaline = draw_aaline_stage( draw ); 946 if (!aaline) 947 goto fail; 948 949 /* create special texture, sampler state */ 950 if (!aaline_create_texture(aaline)) 951 goto fail; 952 953 if (!aaline_create_sampler(aaline)) 954 goto fail; 955 956 /* save original driver functions */ 957 aaline->driver_create_fs_state = pipe->create_fs_state; 958 aaline->driver_bind_fs_state = pipe->bind_fs_state; 959 aaline->driver_delete_fs_state = pipe->delete_fs_state; 960 961 aaline->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 962 aaline->driver_set_sampler_views = pipe->set_fragment_sampler_views; 963 964 /* override the driver's functions */ 965 pipe->create_fs_state = aaline_create_fs_state; 966 pipe->bind_fs_state = aaline_bind_fs_state; 967 pipe->delete_fs_state = aaline_delete_fs_state; 968 969 pipe->bind_fragment_sampler_states = aaline_bind_sampler_states; 970 pipe->set_fragment_sampler_views = aaline_set_sampler_views; 971 972 /* Install once everything is known to be OK: 973 */ 974 draw->pipeline.aaline = &aaline->stage; 975 976 return TRUE; 977 978 fail: 979 if (aaline) 980 aaline->stage.destroy( &aaline->stage ); 981 982 return FALSE; 983} 984