draw_pipe_aaline.c revision 413511f7967260c61085a4fa61bebdcc385cf7ca
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 * Max texture level for the alpha texture used for antialiasing 59 */ 60#define MAX_TEXTURE_LEVEL 5 /* 32 x 32 */ 61 62 63/** 64 * Subclass of pipe_shader_state to carry extra fragment shader info. 65 */ 66struct aaline_fragment_shader 67{ 68 struct pipe_shader_state state; 69 void *driver_fs; 70 void *aaline_fs; 71 uint sampler_unit; 72 int generic_attrib; /**< texcoord/generic used for texture */ 73}; 74 75 76/** 77 * Subclass of draw_stage 78 */ 79struct aaline_stage 80{ 81 struct draw_stage stage; 82 83 float half_line_width; 84 85 /** For AA lines, this is the vertex attrib slot for the new texcoords */ 86 uint tex_slot; 87 /** position, not necessarily output zero */ 88 uint pos_slot; 89 90 void *sampler_cso; 91 struct pipe_resource *texture; 92 struct pipe_sampler_view *sampler_view; 93 uint num_samplers; 94 uint num_sampler_views; 95 96 97 /* 98 * Currently bound state 99 */ 100 struct aaline_fragment_shader *fs; 101 struct { 102 void *sampler[PIPE_MAX_SAMPLERS]; 103 struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; 104 } state; 105 106 /* 107 * Driver interface/override functions 108 */ 109 void * (*driver_create_fs_state)(struct pipe_context *, 110 const struct pipe_shader_state *); 111 void (*driver_bind_fs_state)(struct pipe_context *, void *); 112 void (*driver_delete_fs_state)(struct pipe_context *, void *); 113 114 void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, 115 void **); 116 117 void (*driver_set_sampler_views)(struct pipe_context *, 118 unsigned, 119 struct pipe_sampler_view **); 120}; 121 122 123 124/** 125 * Subclass of tgsi_transform_context, used for transforming the 126 * user's fragment shader to add the special AA instructions. 127 */ 128struct aa_transform_context { 129 struct tgsi_transform_context base; 130 uint tempsUsed; /**< bitmask */ 131 int colorOutput; /**< which output is the primary color */ 132 uint samplersUsed; /**< bitfield of samplers used */ 133 int freeSampler; /** an available sampler for the pstipple */ 134 int maxInput, maxGeneric; /**< max input index found */ 135 int colorTemp, texTemp; /**< temp registers */ 136 boolean firstInstruction; 137}; 138 139 140/** 141 * TGSI declaration transform callback. 142 * Look for a free sampler, a free input attrib, and two free temp regs. 143 */ 144static void 145aa_transform_decl(struct tgsi_transform_context *ctx, 146 struct tgsi_full_declaration *decl) 147{ 148 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 149 150 if (decl->Declaration.File == TGSI_FILE_OUTPUT && 151 decl->Semantic.Name == TGSI_SEMANTIC_COLOR && 152 decl->Semantic.Index == 0) { 153 aactx->colorOutput = decl->Range.First; 154 } 155 else if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 156 uint i; 157 for (i = decl->Range.First; 158 i <= decl->Range.Last; i++) { 159 aactx->samplersUsed |= 1 << i; 160 } 161 } 162 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 163 if ((int) decl->Range.Last > aactx->maxInput) 164 aactx->maxInput = decl->Range.Last; 165 if (decl->Semantic.Name == TGSI_SEMANTIC_GENERIC && 166 (int) decl->Semantic.Index > aactx->maxGeneric) { 167 aactx->maxGeneric = decl->Semantic.Index; 168 } 169 } 170 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 171 uint i; 172 for (i = decl->Range.First; 173 i <= decl->Range.Last; i++) { 174 aactx->tempsUsed |= (1 << i); 175 } 176 } 177 178 ctx->emit_declaration(ctx, decl); 179} 180 181 182/** 183 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 184 */ 185static int 186free_bit(uint bitfield) 187{ 188 return ffs(~bitfield) - 1; 189} 190 191 192/** 193 * TGSI instruction transform callback. 194 * Replace writes to result.color w/ a temp reg. 195 * Upon END instruction, insert texture sampling code for antialiasing. 196 */ 197static void 198aa_transform_inst(struct tgsi_transform_context *ctx, 199 struct tgsi_full_instruction *inst) 200{ 201 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 202 203 if (aactx->firstInstruction) { 204 /* emit our new declarations before the first instruction */ 205 206 struct tgsi_full_declaration decl; 207 uint i; 208 209 /* find free sampler */ 210 aactx->freeSampler = free_bit(aactx->samplersUsed); 211 if (aactx->freeSampler >= PIPE_MAX_SAMPLERS) 212 aactx->freeSampler = PIPE_MAX_SAMPLERS - 1; 213 214 /* find two free temp regs */ 215 for (i = 0; i < 32; i++) { 216 if ((aactx->tempsUsed & (1 << i)) == 0) { 217 /* found a free temp */ 218 if (aactx->colorTemp < 0) 219 aactx->colorTemp = i; 220 else if (aactx->texTemp < 0) 221 aactx->texTemp = i; 222 else 223 break; 224 } 225 } 226 assert(aactx->colorTemp >= 0); 227 assert(aactx->texTemp >= 0); 228 229 /* declare new generic input/texcoord */ 230 decl = tgsi_default_full_declaration(); 231 decl.Declaration.File = TGSI_FILE_INPUT; 232 /* XXX this could be linear... */ 233 decl.Declaration.Interpolate = TGSI_INTERPOLATE_PERSPECTIVE; 234 decl.Declaration.Semantic = 1; 235 decl.Semantic.Name = TGSI_SEMANTIC_GENERIC; 236 decl.Semantic.Index = aactx->maxGeneric + 1; 237 decl.Range.First = 238 decl.Range.Last = aactx->maxInput + 1; 239 ctx->emit_declaration(ctx, &decl); 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 = aactx->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 = aactx->texTemp; 253 ctx->emit_declaration(ctx, &decl); 254 255 decl = tgsi_default_full_declaration(); 256 decl.Declaration.File = TGSI_FILE_TEMPORARY; 257 decl.Range.First = 258 decl.Range.Last = aactx->colorTemp; 259 ctx->emit_declaration(ctx, &decl); 260 261 aactx->firstInstruction = FALSE; 262 } 263 264 if (inst->Instruction.Opcode == TGSI_OPCODE_END && 265 aactx->colorOutput != -1) { 266 struct tgsi_full_instruction newInst; 267 268 /* TEX */ 269 newInst = tgsi_default_full_instruction(); 270 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 271 newInst.Instruction.NumDstRegs = 1; 272 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 273 newInst.Dst[0].Register.Index = aactx->texTemp; 274 newInst.Instruction.NumSrcRegs = 2; 275 newInst.Instruction.Texture = TRUE; 276 newInst.Texture.Texture = TGSI_TEXTURE_2D; 277 newInst.Src[0].Register.File = TGSI_FILE_INPUT; 278 newInst.Src[0].Register.Index = aactx->maxInput + 1; 279 newInst.Src[1].Register.File = TGSI_FILE_SAMPLER; 280 newInst.Src[1].Register.Index = aactx->freeSampler; 281 282 ctx->emit_instruction(ctx, &newInst); 283 284 /* MOV rgb */ 285 newInst = tgsi_default_full_instruction(); 286 newInst.Instruction.Opcode = TGSI_OPCODE_MOV; 287 newInst.Instruction.NumDstRegs = 1; 288 newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; 289 newInst.Dst[0].Register.Index = aactx->colorOutput; 290 newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZ; 291 newInst.Instruction.NumSrcRegs = 1; 292 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 293 newInst.Src[0].Register.Index = aactx->colorTemp; 294 ctx->emit_instruction(ctx, &newInst); 295 296 /* MUL alpha */ 297 newInst = tgsi_default_full_instruction(); 298 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 299 newInst.Instruction.NumDstRegs = 1; 300 newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; 301 newInst.Dst[0].Register.Index = aactx->colorOutput; 302 newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_W; 303 newInst.Instruction.NumSrcRegs = 2; 304 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 305 newInst.Src[0].Register.Index = aactx->colorTemp; 306 newInst.Src[1].Register.File = TGSI_FILE_TEMPORARY; 307 newInst.Src[1].Register.Index = aactx->texTemp; 308 ctx->emit_instruction(ctx, &newInst); 309 310 /* END */ 311 newInst = tgsi_default_full_instruction(); 312 newInst.Instruction.Opcode = TGSI_OPCODE_END; 313 newInst.Instruction.NumDstRegs = 0; 314 newInst.Instruction.NumSrcRegs = 0; 315 ctx->emit_instruction(ctx, &newInst); 316 } 317 else { 318 /* Not an END instruction. 319 * Look for writes to result.color and replace with colorTemp reg. 320 */ 321 uint i; 322 323 for (i = 0; i < inst->Instruction.NumDstRegs; i++) { 324 struct tgsi_full_dst_register *dst = &inst->Dst[i]; 325 if (dst->Register.File == TGSI_FILE_OUTPUT && 326 dst->Register.Index == aactx->colorOutput) { 327 dst->Register.File = TGSI_FILE_TEMPORARY; 328 dst->Register.Index = aactx->colorTemp; 329 } 330 } 331 332 ctx->emit_instruction(ctx, inst); 333 } 334} 335 336 337/** 338 * Generate the frag shader we'll use for drawing AA lines. 339 * This will be the user's shader plus some texture/modulate instructions. 340 */ 341static boolean 342generate_aaline_fs(struct aaline_stage *aaline) 343{ 344 struct pipe_context *pipe = aaline->stage.draw->pipe; 345 const struct pipe_shader_state *orig_fs = &aaline->fs->state; 346 struct pipe_shader_state aaline_fs; 347 struct aa_transform_context transform; 348 const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; 349 350 aaline_fs = *orig_fs; /* copy to init */ 351 aaline_fs.tokens = tgsi_alloc_tokens(newLen); 352 if (aaline_fs.tokens == NULL) 353 return FALSE; 354 355 memset(&transform, 0, sizeof(transform)); 356 transform.colorOutput = -1; 357 transform.maxInput = -1; 358 transform.maxGeneric = -1; 359 transform.colorTemp = -1; 360 transform.texTemp = -1; 361 transform.firstInstruction = TRUE; 362 transform.base.transform_instruction = aa_transform_inst; 363 transform.base.transform_declaration = aa_transform_decl; 364 365 tgsi_transform_shader(orig_fs->tokens, 366 (struct tgsi_token *) aaline_fs.tokens, 367 newLen, &transform.base); 368 369#if 0 /* DEBUG */ 370 tgsi_dump(orig_fs->tokens, 0); 371 tgsi_dump(aaline_fs.tokens, 0); 372#endif 373 374 aaline->fs->sampler_unit = transform.freeSampler; 375 376 aaline->fs->aaline_fs = aaline->driver_create_fs_state(pipe, &aaline_fs); 377 if (aaline->fs->aaline_fs == NULL) 378 goto fail; 379 380 aaline->fs->generic_attrib = transform.maxGeneric + 1; 381 FREE((void *)aaline_fs.tokens); 382 return TRUE; 383 384fail: 385 FREE((void *)aaline_fs.tokens); 386 return FALSE; 387} 388 389 390/** 391 * Create the texture map we'll use for antialiasing the lines. 392 */ 393static boolean 394aaline_create_texture(struct aaline_stage *aaline) 395{ 396 struct pipe_context *pipe = aaline->stage.draw->pipe; 397 struct pipe_screen *screen = pipe->screen; 398 struct pipe_resource texTemp; 399 struct pipe_sampler_view viewTempl; 400 uint level; 401 402 memset(&texTemp, 0, sizeof(texTemp)); 403 texTemp.target = PIPE_TEXTURE_2D; 404 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 405 texTemp.last_level = MAX_TEXTURE_LEVEL; 406 texTemp.width0 = 1 << MAX_TEXTURE_LEVEL; 407 texTemp.height0 = 1 << MAX_TEXTURE_LEVEL; 408 texTemp.depth0 = 1; 409 texTemp.array_size = 1; 410 texTemp.bind = PIPE_BIND_SAMPLER_VIEW; 411 412 aaline->texture = screen->resource_create(screen, &texTemp); 413 if (!aaline->texture) 414 return FALSE; 415 416 u_sampler_view_default_template(&viewTempl, 417 aaline->texture, 418 aaline->texture->format); 419 aaline->sampler_view = pipe->create_sampler_view(pipe, 420 aaline->texture, 421 &viewTempl); 422 if (!aaline->sampler_view) { 423 return FALSE; 424 } 425 426 /* Fill in mipmap images. 427 * Basically each level is solid opaque, except for the outermost 428 * texels which are zero. Special case the 1x1 and 2x2 levels 429 * (though, those levels shouldn't be used - see the max_lod setting). 430 */ 431 for (level = 0; level <= MAX_TEXTURE_LEVEL; level++) { 432 struct pipe_transfer *transfer; 433 struct pipe_box box; 434 const uint size = u_minify(aaline->texture->width0, level); 435 ubyte *data; 436 uint i, j; 437 438 assert(aaline->texture->width0 == aaline->texture->height0); 439 440 u_box_origin_2d( size, size, &box ); 441 442 /* This texture is new, no need to flush. 443 */ 444 transfer = pipe->get_transfer(pipe, 445 aaline->texture, 446 level, 447 PIPE_TRANSFER_WRITE, 448 &box); 449 450 data = pipe->transfer_map(pipe, transfer); 451 if (data == NULL) 452 return FALSE; 453 454 for (i = 0; i < size; i++) { 455 for (j = 0; j < size; j++) { 456 ubyte d; 457 if (size == 1) { 458 d = 255; 459 } 460 else if (size == 2) { 461 d = 200; /* tuneable */ 462 } 463 else if (i == 0 || j == 0 || i == size - 1 || j == size - 1) { 464 d = 35; /* edge texel */ 465 } 466 else { 467 d = 255; 468 } 469 data[i * transfer->stride + j] = d; 470 } 471 } 472 473 /* unmap */ 474 pipe->transfer_unmap(pipe, transfer); 475 pipe->transfer_destroy(pipe, transfer); 476 } 477 return TRUE; 478} 479 480 481/** 482 * Create the sampler CSO that'll be used for antialiasing. 483 * By using a mipmapped texture, we don't have to generate a different 484 * texture image for each line size. 485 */ 486static boolean 487aaline_create_sampler(struct aaline_stage *aaline) 488{ 489 struct pipe_sampler_state sampler; 490 struct pipe_context *pipe = aaline->stage.draw->pipe; 491 492 memset(&sampler, 0, sizeof(sampler)); 493 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 494 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 495 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 496 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_LINEAR; 497 sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR; 498 sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR; 499 sampler.normalized_coords = 1; 500 sampler.min_lod = 0.0f; 501 /* avoid using the 1x1 and 2x2 mipmap levels */ 502 sampler.max_lod = MAX_TEXTURE_LEVEL - 2; 503 504 aaline->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 505 if (aaline->sampler_cso == NULL) 506 return FALSE; 507 508 return TRUE; 509} 510 511 512/** 513 * When we're about to draw our first AA line in a batch, this function is 514 * called to tell the driver to bind our modified fragment shader. 515 */ 516static boolean 517bind_aaline_fragment_shader(struct aaline_stage *aaline) 518{ 519 struct draw_context *draw = aaline->stage.draw; 520 struct pipe_context *pipe = draw->pipe; 521 522 if (!aaline->fs->aaline_fs && 523 !generate_aaline_fs(aaline)) 524 return FALSE; 525 526 draw->suspend_flushing = TRUE; 527 aaline->driver_bind_fs_state(pipe, aaline->fs->aaline_fs); 528 draw->suspend_flushing = FALSE; 529 530 return TRUE; 531} 532 533 534 535static INLINE struct aaline_stage * 536aaline_stage( struct draw_stage *stage ) 537{ 538 return (struct aaline_stage *) stage; 539} 540 541 542/** 543 * Draw a wide line by drawing a quad, using geometry which will 544 * fullfill GL's antialiased line requirements. 545 */ 546static void 547aaline_line(struct draw_stage *stage, struct prim_header *header) 548{ 549 const struct aaline_stage *aaline = aaline_stage(stage); 550 const float half_width = aaline->half_line_width; 551 struct prim_header tri; 552 struct vertex_header *v[8]; 553 uint texPos = aaline->tex_slot; 554 uint posPos = aaline->pos_slot; 555 float *pos, *tex; 556 float dx = header->v[1]->data[posPos][0] - header->v[0]->data[posPos][0]; 557 float dy = header->v[1]->data[posPos][1] - header->v[0]->data[posPos][1]; 558 double a = atan2(dy, dx); 559 float c_a = (float) cos(a), s_a = (float) sin(a); 560 uint i; 561 562 /* XXX the ends of lines aren't quite perfect yet, but probably passable */ 563 dx = 0.5F * half_width; 564 dy = half_width; 565 566 /* allocate/dup new verts */ 567 for (i = 0; i < 8; i++) { 568 v[i] = dup_vert(stage, header->v[i/4], i); 569 } 570 571 /* 572 * Quad strip for line from v0 to v1 (*=endpoints): 573 * 574 * 1 3 5 7 575 * +---+---------------------+---+ 576 * | | 577 * | *v0 v1* | 578 * | | 579 * +---+---------------------+---+ 580 * 0 2 4 6 581 */ 582 583 /* new verts */ 584 pos = v[0]->data[posPos]; 585 pos[0] += (-dx * c_a - dy * s_a); 586 pos[1] += (-dx * s_a + dy * c_a); 587 588 pos = v[1]->data[posPos]; 589 pos[0] += (-dx * c_a - -dy * s_a); 590 pos[1] += (-dx * s_a + -dy * c_a); 591 592 pos = v[2]->data[posPos]; 593 pos[0] += ( dx * c_a - dy * s_a); 594 pos[1] += ( dx * s_a + dy * c_a); 595 596 pos = v[3]->data[posPos]; 597 pos[0] += ( dx * c_a - -dy * s_a); 598 pos[1] += ( dx * s_a + -dy * c_a); 599 600 pos = v[4]->data[posPos]; 601 pos[0] += (-dx * c_a - dy * s_a); 602 pos[1] += (-dx * s_a + dy * c_a); 603 604 pos = v[5]->data[posPos]; 605 pos[0] += (-dx * c_a - -dy * s_a); 606 pos[1] += (-dx * s_a + -dy * c_a); 607 608 pos = v[6]->data[posPos]; 609 pos[0] += ( dx * c_a - dy * s_a); 610 pos[1] += ( dx * s_a + dy * c_a); 611 612 pos = v[7]->data[posPos]; 613 pos[0] += ( dx * c_a - -dy * s_a); 614 pos[1] += ( dx * s_a + -dy * c_a); 615 616 /* new texcoords */ 617 tex = v[0]->data[texPos]; 618 ASSIGN_4V(tex, 0, 0, 0, 1); 619 620 tex = v[1]->data[texPos]; 621 ASSIGN_4V(tex, 0, 1, 0, 1); 622 623 tex = v[2]->data[texPos]; 624 ASSIGN_4V(tex, .5, 0, 0, 1); 625 626 tex = v[3]->data[texPos]; 627 ASSIGN_4V(tex, .5, 1, 0, 1); 628 629 tex = v[4]->data[texPos]; 630 ASSIGN_4V(tex, .5, 0, 0, 1); 631 632 tex = v[5]->data[texPos]; 633 ASSIGN_4V(tex, .5, 1, 0, 1); 634 635 tex = v[6]->data[texPos]; 636 ASSIGN_4V(tex, 1, 0, 0, 1); 637 638 tex = v[7]->data[texPos]; 639 ASSIGN_4V(tex, 1, 1, 0, 1); 640 641 /* emit 6 tris for the quad strip */ 642 tri.v[0] = v[2]; tri.v[1] = v[1]; tri.v[2] = v[0]; 643 stage->next->tri( stage->next, &tri ); 644 645 tri.v[0] = v[3]; tri.v[1] = v[1]; tri.v[2] = v[2]; 646 stage->next->tri( stage->next, &tri ); 647 648 tri.v[0] = v[4]; tri.v[1] = v[3]; tri.v[2] = v[2]; 649 stage->next->tri( stage->next, &tri ); 650 651 tri.v[0] = v[5]; tri.v[1] = v[3]; tri.v[2] = v[4]; 652 stage->next->tri( stage->next, &tri ); 653 654 tri.v[0] = v[6]; tri.v[1] = v[5]; tri.v[2] = v[4]; 655 stage->next->tri( stage->next, &tri ); 656 657 tri.v[0] = v[7]; tri.v[1] = v[5]; tri.v[2] = v[6]; 658 stage->next->tri( stage->next, &tri ); 659} 660 661 662static void 663aaline_first_line(struct draw_stage *stage, struct prim_header *header) 664{ 665 auto struct aaline_stage *aaline = aaline_stage(stage); 666 struct draw_context *draw = stage->draw; 667 struct pipe_context *pipe = draw->pipe; 668 const struct pipe_rasterizer_state *rast = draw->rasterizer; 669 uint num_samplers; 670 void *r; 671 672 assert(draw->rasterizer->line_smooth); 673 674 if (draw->rasterizer->line_width <= 2.2) 675 aaline->half_line_width = 1.1f; 676 else 677 aaline->half_line_width = 0.5f * draw->rasterizer->line_width; 678 679 /* 680 * Bind (generate) our fragprog, sampler and texture 681 */ 682 if (!bind_aaline_fragment_shader(aaline)) { 683 stage->line = draw_pipe_passthrough_line; 684 stage->line(stage, header); 685 return; 686 } 687 688 /* update vertex attrib info */ 689 aaline->tex_slot = draw_current_shader_outputs(draw); 690 aaline->pos_slot = draw_current_shader_position_output(draw);; 691 692 /* allocate the extra post-transformed vertex attribute */ 693 (void) draw_alloc_extra_vertex_attrib(draw, TGSI_SEMANTIC_GENERIC, 694 aaline->fs->generic_attrib); 695 696 /* how many samplers? */ 697 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 698 num_samplers = MAX2(aaline->num_sampler_views, aaline->num_samplers); 699 num_samplers = MAX2(num_samplers, aaline->fs->sampler_unit + 1); 700 701 aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso; 702 pipe_sampler_view_reference(&aaline->state.sampler_views[aaline->fs->sampler_unit], 703 aaline->sampler_view); 704 705 draw->suspend_flushing = TRUE; 706 aaline->driver_bind_sampler_states(pipe, num_samplers, aaline->state.sampler); 707 aaline->driver_set_sampler_views(pipe, num_samplers, aaline->state.sampler_views); 708 709 /* Disable triangle culling, stippling, unfilled mode etc. */ 710 r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade); 711 pipe->bind_rasterizer_state(pipe, r); 712 713 draw->suspend_flushing = FALSE; 714 715 /* now really draw first line */ 716 stage->line = aaline_line; 717 stage->line(stage, header); 718} 719 720 721static void 722aaline_flush(struct draw_stage *stage, unsigned flags) 723{ 724 struct draw_context *draw = stage->draw; 725 struct aaline_stage *aaline = aaline_stage(stage); 726 struct pipe_context *pipe = draw->pipe; 727 728 stage->line = aaline_first_line; 729 stage->next->flush( stage->next, flags ); 730 731 /* restore original frag shader, texture, sampler state */ 732 draw->suspend_flushing = TRUE; 733 aaline->driver_bind_fs_state(pipe, aaline->fs->driver_fs); 734 aaline->driver_bind_sampler_states(pipe, aaline->num_samplers, 735 aaline->state.sampler); 736 aaline->driver_set_sampler_views(pipe, 737 aaline->num_sampler_views, 738 aaline->state.sampler_views); 739 740 /* restore original rasterizer state */ 741 if (draw->rast_handle) { 742 pipe->bind_rasterizer_state(pipe, draw->rast_handle); 743 } 744 745 draw->suspend_flushing = FALSE; 746 747 draw_remove_extra_vertex_attribs(draw); 748} 749 750 751static void 752aaline_reset_stipple_counter(struct draw_stage *stage) 753{ 754 stage->next->reset_stipple_counter( stage->next ); 755} 756 757 758static void 759aaline_destroy(struct draw_stage *stage) 760{ 761 struct aaline_stage *aaline = aaline_stage(stage); 762 struct pipe_context *pipe = stage->draw->pipe; 763 uint i; 764 765 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 766 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 767 } 768 769 if (aaline->sampler_cso) 770 pipe->delete_sampler_state(pipe, aaline->sampler_cso); 771 772 if (aaline->texture) 773 pipe_resource_reference(&aaline->texture, NULL); 774 775 if (aaline->sampler_view) { 776 pipe_sampler_view_reference(&aaline->sampler_view, NULL); 777 } 778 779 draw_free_temp_verts( stage ); 780 781 FREE( stage ); 782} 783 784 785static struct aaline_stage * 786draw_aaline_stage(struct draw_context *draw) 787{ 788 struct aaline_stage *aaline = CALLOC_STRUCT(aaline_stage); 789 if (aaline == NULL) 790 return NULL; 791 792 aaline->stage.draw = draw; 793 aaline->stage.name = "aaline"; 794 aaline->stage.next = NULL; 795 aaline->stage.point = draw_pipe_passthrough_point; 796 aaline->stage.line = aaline_first_line; 797 aaline->stage.tri = draw_pipe_passthrough_tri; 798 aaline->stage.flush = aaline_flush; 799 aaline->stage.reset_stipple_counter = aaline_reset_stipple_counter; 800 aaline->stage.destroy = aaline_destroy; 801 802 if (!draw_alloc_temp_verts( &aaline->stage, 8 )) 803 goto fail; 804 805 return aaline; 806 807 fail: 808 if (aaline) 809 aaline->stage.destroy(&aaline->stage); 810 811 return NULL; 812} 813 814 815static struct aaline_stage * 816aaline_stage_from_pipe(struct pipe_context *pipe) 817{ 818 struct draw_context *draw = (struct draw_context *) pipe->draw; 819 return aaline_stage(draw->pipeline.aaline); 820} 821 822 823/** 824 * This function overrides the driver's create_fs_state() function and 825 * will typically be called by the state tracker. 826 */ 827static void * 828aaline_create_fs_state(struct pipe_context *pipe, 829 const struct pipe_shader_state *fs) 830{ 831 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 832 struct aaline_fragment_shader *aafs = CALLOC_STRUCT(aaline_fragment_shader); 833 834 if (aafs == NULL) 835 return NULL; 836 837 aafs->state = *fs; 838 839 /* pass-through */ 840 aafs->driver_fs = aaline->driver_create_fs_state(pipe, fs); 841 842 return aafs; 843} 844 845 846static void 847aaline_bind_fs_state(struct pipe_context *pipe, void *fs) 848{ 849 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 850 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 851 852 /* save current */ 853 aaline->fs = aafs; 854 /* pass-through */ 855 aaline->driver_bind_fs_state(pipe, (aafs ? aafs->driver_fs : NULL)); 856} 857 858 859static void 860aaline_delete_fs_state(struct pipe_context *pipe, void *fs) 861{ 862 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 863 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 864 865 /* pass-through */ 866 aaline->driver_delete_fs_state(pipe, aafs->driver_fs); 867 868 if (aafs->aaline_fs) 869 aaline->driver_delete_fs_state(pipe, aafs->aaline_fs); 870 871 FREE(aafs); 872} 873 874 875static void 876aaline_bind_sampler_states(struct pipe_context *pipe, 877 unsigned num, void **sampler) 878{ 879 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 880 881 /* save current */ 882 memcpy(aaline->state.sampler, sampler, num * sizeof(void *)); 883 aaline->num_samplers = num; 884 885 /* pass-through */ 886 aaline->driver_bind_sampler_states(pipe, num, sampler); 887} 888 889 890static void 891aaline_set_sampler_views(struct pipe_context *pipe, 892 unsigned num, 893 struct pipe_sampler_view **views) 894{ 895 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 896 uint i; 897 898 /* save current */ 899 for (i = 0; i < num; i++) { 900 pipe_sampler_view_reference(&aaline->state.sampler_views[i], views[i]); 901 } 902 for ( ; i < PIPE_MAX_SAMPLERS; i++) { 903 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 904 } 905 aaline->num_sampler_views = num; 906 907 /* pass-through */ 908 aaline->driver_set_sampler_views(pipe, num, views); 909} 910 911 912/** 913 * Called by drivers that want to install this AA line prim stage 914 * into the draw module's pipeline. This will not be used if the 915 * hardware has native support for AA lines. 916 */ 917boolean 918draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe) 919{ 920 struct aaline_stage *aaline; 921 922 pipe->draw = (void *) draw; 923 924 /* 925 * Create / install AA line drawing / prim stage 926 */ 927 aaline = draw_aaline_stage( draw ); 928 if (!aaline) 929 goto fail; 930 931 /* create special texture, sampler state */ 932 if (!aaline_create_texture(aaline)) 933 goto fail; 934 935 if (!aaline_create_sampler(aaline)) 936 goto fail; 937 938 /* save original driver functions */ 939 aaline->driver_create_fs_state = pipe->create_fs_state; 940 aaline->driver_bind_fs_state = pipe->bind_fs_state; 941 aaline->driver_delete_fs_state = pipe->delete_fs_state; 942 943 aaline->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 944 aaline->driver_set_sampler_views = pipe->set_fragment_sampler_views; 945 946 /* override the driver's functions */ 947 pipe->create_fs_state = aaline_create_fs_state; 948 pipe->bind_fs_state = aaline_bind_fs_state; 949 pipe->delete_fs_state = aaline_delete_fs_state; 950 951 pipe->bind_fragment_sampler_states = aaline_bind_sampler_states; 952 pipe->set_fragment_sampler_views = aaline_set_sampler_views; 953 954 /* Install once everything is known to be OK: 955 */ 956 draw->pipeline.aaline = &aaline->stage; 957 958 return TRUE; 959 960 fail: 961 if (aaline) 962 aaline->stage.destroy( &aaline->stage ); 963 964 return FALSE; 965} 966