draw_pipe_aaline.c revision 5349b95920c82ab9187fe965f3921bd564fe6524
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 tgsi_dump(orig_fs->tokens, 0); 378 tgsi_dump(aaline_fs.tokens, 0); 379#endif 380 381 aaline->fs->sampler_unit = transform.freeSampler; 382 383 aaline->fs->aaline_fs = aaline->driver_create_fs_state(pipe, &aaline_fs); 384 if (aaline->fs->aaline_fs == NULL) 385 goto fail; 386 387 aaline->fs->generic_attrib = transform.maxGeneric + 1; 388 FREE((void *)aaline_fs.tokens); 389 return TRUE; 390 391fail: 392 FREE((void *)aaline_fs.tokens); 393 return FALSE; 394} 395 396 397/** 398 * Create the texture map we'll use for antialiasing the lines. 399 */ 400static boolean 401aaline_create_texture(struct aaline_stage *aaline) 402{ 403 struct pipe_context *pipe = aaline->stage.draw->pipe; 404 struct pipe_screen *screen = pipe->screen; 405 struct pipe_resource texTemp; 406 struct pipe_sampler_view viewTempl; 407 uint level; 408 409 memset(&texTemp, 0, sizeof(texTemp)); 410 texTemp.target = PIPE_TEXTURE_2D; 411 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 412 texTemp.last_level = MAX_TEXTURE_LEVEL; 413 texTemp.width0 = 1 << TEXTURE_SIZE_LOG2; 414 texTemp.height0 = 1 << TEXTURE_SIZE_LOG2; 415 texTemp.depth0 = 1; 416 texTemp.array_size = 1; 417 texTemp.bind = PIPE_BIND_SAMPLER_VIEW; 418 419 aaline->texture = screen->resource_create(screen, &texTemp); 420 if (!aaline->texture) 421 return FALSE; 422 423 u_sampler_view_default_template(&viewTempl, 424 aaline->texture, 425 aaline->texture->format); 426 aaline->sampler_view = pipe->create_sampler_view(pipe, 427 aaline->texture, 428 &viewTempl); 429 if (!aaline->sampler_view) { 430 return FALSE; 431 } 432 433 /* Fill in mipmap images. 434 * Basically each level is solid opaque, except for the outermost 435 * texels which are zero. Special case the 1x1 and 2x2 levels 436 * (though, those levels shouldn't be used - see the max_lod setting). 437 */ 438 for (level = 0; level <= MAX_TEXTURE_LEVEL; level++) { 439 struct pipe_transfer *transfer; 440 struct pipe_box box; 441 const uint size = u_minify(aaline->texture->width0, level); 442 ubyte *data; 443 uint i, j; 444 445 assert(aaline->texture->width0 == aaline->texture->height0); 446 447 u_box_origin_2d( size, size, &box ); 448 449 /* This texture is new, no need to flush. 450 */ 451 transfer = pipe->get_transfer(pipe, 452 aaline->texture, 453 level, 454 PIPE_TRANSFER_WRITE, 455 &box); 456 457 data = pipe->transfer_map(pipe, transfer); 458 if (data == NULL) 459 return FALSE; 460 461 for (i = 0; i < size; i++) { 462 for (j = 0; j < size; j++) { 463 ubyte d; 464 if (size == 1) { 465 d = 255; 466 } 467 else if (size == 2) { 468 d = 200; /* tuneable */ 469 } 470 else if (i == 0 || j == 0 || i == size - 1 || j == size - 1) { 471 d = 35; /* edge texel */ 472 } 473 else { 474 d = 255; 475 } 476 data[i * transfer->stride + j] = d; 477 } 478 } 479 480 /* unmap */ 481 pipe->transfer_unmap(pipe, transfer); 482 pipe->transfer_destroy(pipe, transfer); 483 } 484 return TRUE; 485} 486 487 488/** 489 * Create the sampler CSO that'll be used for antialiasing. 490 * By using a mipmapped texture, we don't have to generate a different 491 * texture image for each line size. 492 */ 493static boolean 494aaline_create_sampler(struct aaline_stage *aaline) 495{ 496 struct pipe_sampler_state sampler; 497 struct pipe_context *pipe = aaline->stage.draw->pipe; 498 499 memset(&sampler, 0, sizeof(sampler)); 500 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 501 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 502 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 503 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_LINEAR; 504 sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR; 505 sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR; 506 sampler.normalized_coords = 1; 507 sampler.min_lod = 0.0f; 508 sampler.max_lod = MAX_TEXTURE_LEVEL; 509 510 aaline->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 511 if (aaline->sampler_cso == NULL) 512 return FALSE; 513 514 return TRUE; 515} 516 517 518/** 519 * When we're about to draw our first AA line in a batch, this function is 520 * called to tell the driver to bind our modified fragment shader. 521 */ 522static boolean 523bind_aaline_fragment_shader(struct aaline_stage *aaline) 524{ 525 struct draw_context *draw = aaline->stage.draw; 526 struct pipe_context *pipe = draw->pipe; 527 528 if (!aaline->fs->aaline_fs && 529 !generate_aaline_fs(aaline)) 530 return FALSE; 531 532 draw->suspend_flushing = TRUE; 533 aaline->driver_bind_fs_state(pipe, aaline->fs->aaline_fs); 534 draw->suspend_flushing = FALSE; 535 536 return TRUE; 537} 538 539 540 541static INLINE struct aaline_stage * 542aaline_stage( struct draw_stage *stage ) 543{ 544 return (struct aaline_stage *) stage; 545} 546 547 548/** 549 * Draw a wide line by drawing a quad, using geometry which will 550 * fullfill GL's antialiased line requirements. 551 */ 552static void 553aaline_line(struct draw_stage *stage, struct prim_header *header) 554{ 555 const struct aaline_stage *aaline = aaline_stage(stage); 556 const float half_width = aaline->half_line_width; 557 struct prim_header tri; 558 struct vertex_header *v[8]; 559 uint texPos = aaline->tex_slot; 560 uint posPos = aaline->pos_slot; 561 float *pos, *tex; 562 float dx = header->v[1]->data[posPos][0] - header->v[0]->data[posPos][0]; 563 float dy = header->v[1]->data[posPos][1] - header->v[0]->data[posPos][1]; 564 double a = atan2(dy, dx); 565 float c_a = (float) cos(a), s_a = (float) sin(a); 566 uint i; 567 568 /* XXX the ends of lines aren't quite perfect yet, but probably passable */ 569 dx = 0.5F * half_width; 570 dy = half_width; 571 572 /* allocate/dup new verts */ 573 for (i = 0; i < 8; i++) { 574 v[i] = dup_vert(stage, header->v[i/4], i); 575 } 576 577 /* 578 * Quad strip for line from v0 to v1 (*=endpoints): 579 * 580 * 1 3 5 7 581 * +---+---------------------+---+ 582 * | | 583 * | *v0 v1* | 584 * | | 585 * +---+---------------------+---+ 586 * 0 2 4 6 587 */ 588 589 /* new verts */ 590 pos = v[0]->data[posPos]; 591 pos[0] += (-dx * c_a - dy * s_a); 592 pos[1] += (-dx * s_a + dy * c_a); 593 594 pos = v[1]->data[posPos]; 595 pos[0] += (-dx * c_a - -dy * s_a); 596 pos[1] += (-dx * s_a + -dy * c_a); 597 598 pos = v[2]->data[posPos]; 599 pos[0] += ( dx * c_a - dy * s_a); 600 pos[1] += ( dx * s_a + dy * c_a); 601 602 pos = v[3]->data[posPos]; 603 pos[0] += ( dx * c_a - -dy * s_a); 604 pos[1] += ( dx * s_a + -dy * c_a); 605 606 pos = v[4]->data[posPos]; 607 pos[0] += (-dx * c_a - dy * s_a); 608 pos[1] += (-dx * s_a + dy * c_a); 609 610 pos = v[5]->data[posPos]; 611 pos[0] += (-dx * c_a - -dy * s_a); 612 pos[1] += (-dx * s_a + -dy * c_a); 613 614 pos = v[6]->data[posPos]; 615 pos[0] += ( dx * c_a - dy * s_a); 616 pos[1] += ( dx * s_a + dy * c_a); 617 618 pos = v[7]->data[posPos]; 619 pos[0] += ( dx * c_a - -dy * s_a); 620 pos[1] += ( dx * s_a + -dy * c_a); 621 622 /* new texcoords */ 623 tex = v[0]->data[texPos]; 624 ASSIGN_4V(tex, 0, 0, 0, 1); 625 626 tex = v[1]->data[texPos]; 627 ASSIGN_4V(tex, 0, 1, 0, 1); 628 629 tex = v[2]->data[texPos]; 630 ASSIGN_4V(tex, .5, 0, 0, 1); 631 632 tex = v[3]->data[texPos]; 633 ASSIGN_4V(tex, .5, 1, 0, 1); 634 635 tex = v[4]->data[texPos]; 636 ASSIGN_4V(tex, .5, 0, 0, 1); 637 638 tex = v[5]->data[texPos]; 639 ASSIGN_4V(tex, .5, 1, 0, 1); 640 641 tex = v[6]->data[texPos]; 642 ASSIGN_4V(tex, 1, 0, 0, 1); 643 644 tex = v[7]->data[texPos]; 645 ASSIGN_4V(tex, 1, 1, 0, 1); 646 647 /* emit 6 tris for the quad strip */ 648 tri.v[0] = v[2]; tri.v[1] = v[1]; tri.v[2] = v[0]; 649 stage->next->tri( stage->next, &tri ); 650 651 tri.v[0] = v[3]; tri.v[1] = v[1]; tri.v[2] = v[2]; 652 stage->next->tri( stage->next, &tri ); 653 654 tri.v[0] = v[4]; tri.v[1] = v[3]; tri.v[2] = v[2]; 655 stage->next->tri( stage->next, &tri ); 656 657 tri.v[0] = v[5]; tri.v[1] = v[3]; tri.v[2] = v[4]; 658 stage->next->tri( stage->next, &tri ); 659 660 tri.v[0] = v[6]; tri.v[1] = v[5]; tri.v[2] = v[4]; 661 stage->next->tri( stage->next, &tri ); 662 663 tri.v[0] = v[7]; tri.v[1] = v[5]; tri.v[2] = v[6]; 664 stage->next->tri( stage->next, &tri ); 665} 666 667 668static void 669aaline_first_line(struct draw_stage *stage, struct prim_header *header) 670{ 671 auto struct aaline_stage *aaline = aaline_stage(stage); 672 struct draw_context *draw = stage->draw; 673 struct pipe_context *pipe = draw->pipe; 674 const struct pipe_rasterizer_state *rast = draw->rasterizer; 675 uint num_samplers; 676 void *r; 677 678 assert(draw->rasterizer->line_smooth); 679 680 if (draw->rasterizer->line_width <= 2.2) 681 aaline->half_line_width = 1.1f; 682 else 683 aaline->half_line_width = 0.5f * draw->rasterizer->line_width; 684 685 /* 686 * Bind (generate) our fragprog, sampler and texture 687 */ 688 if (!bind_aaline_fragment_shader(aaline)) { 689 stage->line = draw_pipe_passthrough_line; 690 stage->line(stage, header); 691 return; 692 } 693 694 /* update vertex attrib info */ 695 aaline->tex_slot = draw_current_shader_outputs(draw); 696 aaline->pos_slot = draw_current_shader_position_output(draw);; 697 698 /* allocate the extra post-transformed vertex attribute */ 699 (void) draw_alloc_extra_vertex_attrib(draw, TGSI_SEMANTIC_GENERIC, 700 aaline->fs->generic_attrib); 701 702 /* how many samplers? */ 703 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 704 num_samplers = MAX2(aaline->num_sampler_views, aaline->num_samplers); 705 num_samplers = MAX2(num_samplers, aaline->fs->sampler_unit + 1); 706 707 aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso; 708 pipe_sampler_view_reference(&aaline->state.sampler_views[aaline->fs->sampler_unit], 709 aaline->sampler_view); 710 711 draw->suspend_flushing = TRUE; 712 aaline->driver_bind_sampler_states(pipe, num_samplers, aaline->state.sampler); 713 aaline->driver_set_sampler_views(pipe, num_samplers, aaline->state.sampler_views); 714 715 /* Disable triangle culling, stippling, unfilled mode etc. */ 716 r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade); 717 pipe->bind_rasterizer_state(pipe, r); 718 719 draw->suspend_flushing = FALSE; 720 721 /* now really draw first line */ 722 stage->line = aaline_line; 723 stage->line(stage, header); 724} 725 726 727static void 728aaline_flush(struct draw_stage *stage, unsigned flags) 729{ 730 struct draw_context *draw = stage->draw; 731 struct aaline_stage *aaline = aaline_stage(stage); 732 struct pipe_context *pipe = draw->pipe; 733 734 stage->line = aaline_first_line; 735 stage->next->flush( stage->next, flags ); 736 737 /* restore original frag shader, texture, sampler state */ 738 draw->suspend_flushing = TRUE; 739 aaline->driver_bind_fs_state(pipe, aaline->fs->driver_fs); 740 aaline->driver_bind_sampler_states(pipe, aaline->num_samplers, 741 aaline->state.sampler); 742 aaline->driver_set_sampler_views(pipe, 743 aaline->num_sampler_views, 744 aaline->state.sampler_views); 745 746 /* restore original rasterizer state */ 747 if (draw->rast_handle) { 748 pipe->bind_rasterizer_state(pipe, draw->rast_handle); 749 } 750 751 draw->suspend_flushing = FALSE; 752 753 draw_remove_extra_vertex_attribs(draw); 754} 755 756 757static void 758aaline_reset_stipple_counter(struct draw_stage *stage) 759{ 760 stage->next->reset_stipple_counter( stage->next ); 761} 762 763 764static void 765aaline_destroy(struct draw_stage *stage) 766{ 767 struct aaline_stage *aaline = aaline_stage(stage); 768 struct pipe_context *pipe = stage->draw->pipe; 769 uint i; 770 771 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 772 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 773 } 774 775 if (aaline->sampler_cso) 776 pipe->delete_sampler_state(pipe, aaline->sampler_cso); 777 778 if (aaline->texture) 779 pipe_resource_reference(&aaline->texture, NULL); 780 781 if (aaline->sampler_view) { 782 pipe_sampler_view_reference(&aaline->sampler_view, NULL); 783 } 784 785 draw_free_temp_verts( stage ); 786 787 /* restore the old entry points */ 788 pipe->create_fs_state = aaline->driver_create_fs_state; 789 pipe->bind_fs_state = aaline->driver_bind_fs_state; 790 pipe->delete_fs_state = aaline->driver_delete_fs_state; 791 792 pipe->bind_fragment_sampler_states = aaline->driver_bind_sampler_states; 793 pipe->set_fragment_sampler_views = aaline->driver_set_sampler_views; 794 795 FREE( stage ); 796} 797 798 799static struct aaline_stage * 800draw_aaline_stage(struct draw_context *draw) 801{ 802 struct aaline_stage *aaline = CALLOC_STRUCT(aaline_stage); 803 if (aaline == NULL) 804 return NULL; 805 806 aaline->stage.draw = draw; 807 aaline->stage.name = "aaline"; 808 aaline->stage.next = NULL; 809 aaline->stage.point = draw_pipe_passthrough_point; 810 aaline->stage.line = aaline_first_line; 811 aaline->stage.tri = draw_pipe_passthrough_tri; 812 aaline->stage.flush = aaline_flush; 813 aaline->stage.reset_stipple_counter = aaline_reset_stipple_counter; 814 aaline->stage.destroy = aaline_destroy; 815 816 if (!draw_alloc_temp_verts( &aaline->stage, 8 )) 817 goto fail; 818 819 return aaline; 820 821 fail: 822 if (aaline) 823 aaline->stage.destroy(&aaline->stage); 824 825 return NULL; 826} 827 828 829static struct aaline_stage * 830aaline_stage_from_pipe(struct pipe_context *pipe) 831{ 832 struct draw_context *draw = (struct draw_context *) pipe->draw; 833 return aaline_stage(draw->pipeline.aaline); 834} 835 836 837/** 838 * This function overrides the driver's create_fs_state() function and 839 * will typically be called by the state tracker. 840 */ 841static void * 842aaline_create_fs_state(struct pipe_context *pipe, 843 const struct pipe_shader_state *fs) 844{ 845 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 846 struct aaline_fragment_shader *aafs = CALLOC_STRUCT(aaline_fragment_shader); 847 848 if (aafs == NULL) 849 return NULL; 850 851 aafs->state = *fs; 852 853 /* pass-through */ 854 aafs->driver_fs = aaline->driver_create_fs_state(pipe, fs); 855 856 return aafs; 857} 858 859 860static void 861aaline_bind_fs_state(struct pipe_context *pipe, void *fs) 862{ 863 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 864 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 865 866 /* save current */ 867 aaline->fs = aafs; 868 /* pass-through */ 869 aaline->driver_bind_fs_state(pipe, (aafs ? aafs->driver_fs : NULL)); 870} 871 872 873static void 874aaline_delete_fs_state(struct pipe_context *pipe, void *fs) 875{ 876 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 877 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 878 879 /* pass-through */ 880 aaline->driver_delete_fs_state(pipe, aafs->driver_fs); 881 882 if (aafs->aaline_fs) 883 aaline->driver_delete_fs_state(pipe, aafs->aaline_fs); 884 885 FREE(aafs); 886} 887 888 889static void 890aaline_bind_sampler_states(struct pipe_context *pipe, 891 unsigned num, void **sampler) 892{ 893 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 894 895 /* save current */ 896 memcpy(aaline->state.sampler, sampler, num * sizeof(void *)); 897 aaline->num_samplers = num; 898 899 /* pass-through */ 900 aaline->driver_bind_sampler_states(pipe, num, sampler); 901} 902 903 904static void 905aaline_set_sampler_views(struct pipe_context *pipe, 906 unsigned num, 907 struct pipe_sampler_view **views) 908{ 909 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 910 uint i; 911 912 /* save current */ 913 for (i = 0; i < num; i++) { 914 pipe_sampler_view_reference(&aaline->state.sampler_views[i], views[i]); 915 } 916 for ( ; i < PIPE_MAX_SAMPLERS; i++) { 917 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 918 } 919 aaline->num_sampler_views = num; 920 921 /* pass-through */ 922 aaline->driver_set_sampler_views(pipe, num, views); 923} 924 925 926/** 927 * Called by drivers that want to install this AA line prim stage 928 * into the draw module's pipeline. This will not be used if the 929 * hardware has native support for AA lines. 930 */ 931boolean 932draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe) 933{ 934 struct aaline_stage *aaline; 935 936 pipe->draw = (void *) draw; 937 938 /* 939 * Create / install AA line drawing / prim stage 940 */ 941 aaline = draw_aaline_stage( draw ); 942 if (!aaline) 943 goto fail; 944 945 /* create special texture, sampler state */ 946 if (!aaline_create_texture(aaline)) 947 goto fail; 948 949 if (!aaline_create_sampler(aaline)) 950 goto fail; 951 952 /* save original driver functions */ 953 aaline->driver_create_fs_state = pipe->create_fs_state; 954 aaline->driver_bind_fs_state = pipe->bind_fs_state; 955 aaline->driver_delete_fs_state = pipe->delete_fs_state; 956 957 aaline->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 958 aaline->driver_set_sampler_views = pipe->set_fragment_sampler_views; 959 960 /* override the driver's functions */ 961 pipe->create_fs_state = aaline_create_fs_state; 962 pipe->bind_fs_state = aaline_bind_fs_state; 963 pipe->delete_fs_state = aaline_delete_fs_state; 964 965 pipe->bind_fragment_sampler_states = aaline_bind_sampler_states; 966 pipe->set_fragment_sampler_views = aaline_set_sampler_views; 967 968 /* Install once everything is known to be OK: 969 */ 970 draw->pipeline.aaline = &aaline->stage; 971 972 return TRUE; 973 974 fail: 975 if (aaline) 976 aaline->stage.destroy( &aaline->stage ); 977 978 return FALSE; 979} 980