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 */ 73 struct 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 */ 86 struct 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 */ 135 struct 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 */ 151 static void 152 aa_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 */ 192 static int 193 free_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 */ 204 static void 205 aa_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 = 1; 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 decl.Interp.Interpolate = TGSI_INTERPOLATE_PERSPECTIVE; 247 ctx->emit_declaration(ctx, &decl); 248 249 /* declare new sampler */ 250 decl = tgsi_default_full_declaration(); 251 decl.Declaration.File = TGSI_FILE_SAMPLER; 252 decl.Range.First = 253 decl.Range.Last = aactx->freeSampler; 254 ctx->emit_declaration(ctx, &decl); 255 256 /* declare new temp regs */ 257 decl = tgsi_default_full_declaration(); 258 decl.Declaration.File = TGSI_FILE_TEMPORARY; 259 decl.Range.First = 260 decl.Range.Last = aactx->texTemp; 261 ctx->emit_declaration(ctx, &decl); 262 263 decl = tgsi_default_full_declaration(); 264 decl.Declaration.File = TGSI_FILE_TEMPORARY; 265 decl.Range.First = 266 decl.Range.Last = aactx->colorTemp; 267 ctx->emit_declaration(ctx, &decl); 268 269 aactx->firstInstruction = FALSE; 270 } 271 272 if (inst->Instruction.Opcode == TGSI_OPCODE_END && 273 aactx->colorOutput != -1) { 274 struct tgsi_full_instruction newInst; 275 276 /* TEX */ 277 newInst = tgsi_default_full_instruction(); 278 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 279 newInst.Instruction.NumDstRegs = 1; 280 newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; 281 newInst.Dst[0].Register.Index = aactx->texTemp; 282 newInst.Instruction.NumSrcRegs = 2; 283 newInst.Instruction.Texture = TRUE; 284 newInst.Texture.Texture = TGSI_TEXTURE_2D; 285 newInst.Src[0].Register.File = TGSI_FILE_INPUT; 286 newInst.Src[0].Register.Index = aactx->maxInput + 1; 287 newInst.Src[1].Register.File = TGSI_FILE_SAMPLER; 288 newInst.Src[1].Register.Index = aactx->freeSampler; 289 290 ctx->emit_instruction(ctx, &newInst); 291 292 /* MOV rgb */ 293 newInst = tgsi_default_full_instruction(); 294 newInst.Instruction.Opcode = TGSI_OPCODE_MOV; 295 newInst.Instruction.NumDstRegs = 1; 296 newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; 297 newInst.Dst[0].Register.Index = aactx->colorOutput; 298 newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZ; 299 newInst.Instruction.NumSrcRegs = 1; 300 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 301 newInst.Src[0].Register.Index = aactx->colorTemp; 302 ctx->emit_instruction(ctx, &newInst); 303 304 /* MUL alpha */ 305 newInst = tgsi_default_full_instruction(); 306 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 307 newInst.Instruction.NumDstRegs = 1; 308 newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; 309 newInst.Dst[0].Register.Index = aactx->colorOutput; 310 newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_W; 311 newInst.Instruction.NumSrcRegs = 2; 312 newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; 313 newInst.Src[0].Register.Index = aactx->colorTemp; 314 newInst.Src[1].Register.File = TGSI_FILE_TEMPORARY; 315 newInst.Src[1].Register.Index = aactx->texTemp; 316 ctx->emit_instruction(ctx, &newInst); 317 318 /* END */ 319 newInst = tgsi_default_full_instruction(); 320 newInst.Instruction.Opcode = TGSI_OPCODE_END; 321 newInst.Instruction.NumDstRegs = 0; 322 newInst.Instruction.NumSrcRegs = 0; 323 ctx->emit_instruction(ctx, &newInst); 324 } 325 else { 326 /* Not an END instruction. 327 * Look for writes to result.color and replace with colorTemp reg. 328 */ 329 uint i; 330 331 for (i = 0; i < inst->Instruction.NumDstRegs; i++) { 332 struct tgsi_full_dst_register *dst = &inst->Dst[i]; 333 if (dst->Register.File == TGSI_FILE_OUTPUT && 334 dst->Register.Index == aactx->colorOutput) { 335 dst->Register.File = TGSI_FILE_TEMPORARY; 336 dst->Register.Index = aactx->colorTemp; 337 } 338 } 339 340 ctx->emit_instruction(ctx, inst); 341 } 342 } 343 344 345 /** 346 * Generate the frag shader we'll use for drawing AA lines. 347 * This will be the user's shader plus some texture/modulate instructions. 348 */ 349 static boolean 350 generate_aaline_fs(struct aaline_stage *aaline) 351 { 352 struct pipe_context *pipe = aaline->stage.draw->pipe; 353 const struct pipe_shader_state *orig_fs = &aaline->fs->state; 354 struct pipe_shader_state aaline_fs; 355 struct aa_transform_context transform; 356 const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; 357 358 aaline_fs = *orig_fs; /* copy to init */ 359 aaline_fs.tokens = tgsi_alloc_tokens(newLen); 360 if (aaline_fs.tokens == NULL) 361 return FALSE; 362 363 memset(&transform, 0, sizeof(transform)); 364 transform.colorOutput = -1; 365 transform.maxInput = -1; 366 transform.maxGeneric = -1; 367 transform.colorTemp = -1; 368 transform.texTemp = -1; 369 transform.firstInstruction = TRUE; 370 transform.base.transform_instruction = aa_transform_inst; 371 transform.base.transform_declaration = aa_transform_decl; 372 373 tgsi_transform_shader(orig_fs->tokens, 374 (struct tgsi_token *) aaline_fs.tokens, 375 newLen, &transform.base); 376 377 #if 0 /* DEBUG */ 378 debug_printf("draw_aaline, orig shader:\n"); 379 tgsi_dump(orig_fs->tokens, 0); 380 debug_printf("draw_aaline, new shader:\n"); 381 tgsi_dump(aaline_fs.tokens, 0); 382 #endif 383 384 aaline->fs->sampler_unit = transform.freeSampler; 385 386 aaline->fs->aaline_fs = aaline->driver_create_fs_state(pipe, &aaline_fs); 387 if (aaline->fs->aaline_fs == NULL) 388 goto fail; 389 390 aaline->fs->generic_attrib = transform.maxGeneric + 1; 391 FREE((void *)aaline_fs.tokens); 392 return TRUE; 393 394 fail: 395 FREE((void *)aaline_fs.tokens); 396 return FALSE; 397 } 398 399 400 /** 401 * Create the texture map we'll use for antialiasing the lines. 402 */ 403 static boolean 404 aaline_create_texture(struct aaline_stage *aaline) 405 { 406 struct pipe_context *pipe = aaline->stage.draw->pipe; 407 struct pipe_screen *screen = pipe->screen; 408 struct pipe_resource texTemp; 409 struct pipe_sampler_view viewTempl; 410 uint level; 411 412 memset(&texTemp, 0, sizeof(texTemp)); 413 texTemp.target = PIPE_TEXTURE_2D; 414 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 415 texTemp.last_level = MAX_TEXTURE_LEVEL; 416 texTemp.width0 = 1 << TEXTURE_SIZE_LOG2; 417 texTemp.height0 = 1 << TEXTURE_SIZE_LOG2; 418 texTemp.depth0 = 1; 419 texTemp.array_size = 1; 420 texTemp.bind = PIPE_BIND_SAMPLER_VIEW; 421 422 aaline->texture = screen->resource_create(screen, &texTemp); 423 if (!aaline->texture) 424 return FALSE; 425 426 u_sampler_view_default_template(&viewTempl, 427 aaline->texture, 428 aaline->texture->format); 429 aaline->sampler_view = pipe->create_sampler_view(pipe, 430 aaline->texture, 431 &viewTempl); 432 if (!aaline->sampler_view) { 433 return FALSE; 434 } 435 436 /* Fill in mipmap images. 437 * Basically each level is solid opaque, except for the outermost 438 * texels which are zero. Special case the 1x1 and 2x2 levels 439 * (though, those levels shouldn't be used - see the max_lod setting). 440 */ 441 for (level = 0; level <= MAX_TEXTURE_LEVEL; level++) { 442 struct pipe_transfer *transfer; 443 struct pipe_box box; 444 const uint size = u_minify(aaline->texture->width0, level); 445 ubyte *data; 446 uint i, j; 447 448 assert(aaline->texture->width0 == aaline->texture->height0); 449 450 u_box_origin_2d( size, size, &box ); 451 452 /* This texture is new, no need to flush. 453 */ 454 transfer = pipe->get_transfer(pipe, 455 aaline->texture, 456 level, 457 PIPE_TRANSFER_WRITE, 458 &box); 459 460 data = pipe->transfer_map(pipe, transfer); 461 if (data == NULL) 462 return FALSE; 463 464 for (i = 0; i < size; i++) { 465 for (j = 0; j < size; j++) { 466 ubyte d; 467 if (size == 1) { 468 d = 255; 469 } 470 else if (size == 2) { 471 d = 200; /* tuneable */ 472 } 473 else if (i == 0 || j == 0 || i == size - 1 || j == size - 1) { 474 d = 35; /* edge texel */ 475 } 476 else { 477 d = 255; 478 } 479 data[i * transfer->stride + j] = d; 480 } 481 } 482 483 /* unmap */ 484 pipe->transfer_unmap(pipe, transfer); 485 pipe->transfer_destroy(pipe, transfer); 486 } 487 return TRUE; 488 } 489 490 491 /** 492 * Create the sampler CSO that'll be used for antialiasing. 493 * By using a mipmapped texture, we don't have to generate a different 494 * texture image for each line size. 495 */ 496 static boolean 497 aaline_create_sampler(struct aaline_stage *aaline) 498 { 499 struct pipe_sampler_state sampler; 500 struct pipe_context *pipe = aaline->stage.draw->pipe; 501 502 memset(&sampler, 0, sizeof(sampler)); 503 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 504 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 505 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 506 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_LINEAR; 507 sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR; 508 sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR; 509 sampler.normalized_coords = 1; 510 sampler.min_lod = 0.0f; 511 sampler.max_lod = MAX_TEXTURE_LEVEL; 512 513 aaline->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 514 if (aaline->sampler_cso == NULL) 515 return FALSE; 516 517 return TRUE; 518 } 519 520 521 /** 522 * When we're about to draw our first AA line in a batch, this function is 523 * called to tell the driver to bind our modified fragment shader. 524 */ 525 static boolean 526 bind_aaline_fragment_shader(struct aaline_stage *aaline) 527 { 528 struct draw_context *draw = aaline->stage.draw; 529 struct pipe_context *pipe = draw->pipe; 530 531 if (!aaline->fs->aaline_fs && 532 !generate_aaline_fs(aaline)) 533 return FALSE; 534 535 draw->suspend_flushing = TRUE; 536 aaline->driver_bind_fs_state(pipe, aaline->fs->aaline_fs); 537 draw->suspend_flushing = FALSE; 538 539 return TRUE; 540 } 541 542 543 544 static INLINE struct aaline_stage * 545 aaline_stage( struct draw_stage *stage ) 546 { 547 return (struct aaline_stage *) stage; 548 } 549 550 551 /** 552 * Draw a wide line by drawing a quad, using geometry which will 553 * fullfill GL's antialiased line requirements. 554 */ 555 static void 556 aaline_line(struct draw_stage *stage, struct prim_header *header) 557 { 558 const struct aaline_stage *aaline = aaline_stage(stage); 559 const float half_width = aaline->half_line_width; 560 struct prim_header tri; 561 struct vertex_header *v[8]; 562 uint texPos = aaline->tex_slot; 563 uint posPos = aaline->pos_slot; 564 float *pos, *tex; 565 float dx = header->v[1]->data[posPos][0] - header->v[0]->data[posPos][0]; 566 float dy = header->v[1]->data[posPos][1] - header->v[0]->data[posPos][1]; 567 double a = atan2(dy, dx); 568 float c_a = (float) cos(a), s_a = (float) sin(a); 569 uint i; 570 571 /* XXX the ends of lines aren't quite perfect yet, but probably passable */ 572 dx = 0.5F * half_width; 573 dy = half_width; 574 575 /* allocate/dup new verts */ 576 for (i = 0; i < 8; i++) { 577 v[i] = dup_vert(stage, header->v[i/4], i); 578 } 579 580 /* 581 * Quad strip for line from v0 to v1 (*=endpoints): 582 * 583 * 1 3 5 7 584 * +---+---------------------+---+ 585 * | | 586 * | *v0 v1* | 587 * | | 588 * +---+---------------------+---+ 589 * 0 2 4 6 590 */ 591 592 /* new verts */ 593 pos = v[0]->data[posPos]; 594 pos[0] += (-dx * c_a - dy * s_a); 595 pos[1] += (-dx * s_a + dy * c_a); 596 597 pos = v[1]->data[posPos]; 598 pos[0] += (-dx * c_a - -dy * s_a); 599 pos[1] += (-dx * s_a + -dy * c_a); 600 601 pos = v[2]->data[posPos]; 602 pos[0] += ( dx * c_a - dy * s_a); 603 pos[1] += ( dx * s_a + dy * c_a); 604 605 pos = v[3]->data[posPos]; 606 pos[0] += ( dx * c_a - -dy * s_a); 607 pos[1] += ( dx * s_a + -dy * c_a); 608 609 pos = v[4]->data[posPos]; 610 pos[0] += (-dx * c_a - dy * s_a); 611 pos[1] += (-dx * s_a + dy * c_a); 612 613 pos = v[5]->data[posPos]; 614 pos[0] += (-dx * c_a - -dy * s_a); 615 pos[1] += (-dx * s_a + -dy * c_a); 616 617 pos = v[6]->data[posPos]; 618 pos[0] += ( dx * c_a - dy * s_a); 619 pos[1] += ( dx * s_a + dy * c_a); 620 621 pos = v[7]->data[posPos]; 622 pos[0] += ( dx * c_a - -dy * s_a); 623 pos[1] += ( dx * s_a + -dy * c_a); 624 625 /* new texcoords */ 626 tex = v[0]->data[texPos]; 627 ASSIGN_4V(tex, 0, 0, 0, 1); 628 629 tex = v[1]->data[texPos]; 630 ASSIGN_4V(tex, 0, 1, 0, 1); 631 632 tex = v[2]->data[texPos]; 633 ASSIGN_4V(tex, .5, 0, 0, 1); 634 635 tex = v[3]->data[texPos]; 636 ASSIGN_4V(tex, .5, 1, 0, 1); 637 638 tex = v[4]->data[texPos]; 639 ASSIGN_4V(tex, .5, 0, 0, 1); 640 641 tex = v[5]->data[texPos]; 642 ASSIGN_4V(tex, .5, 1, 0, 1); 643 644 tex = v[6]->data[texPos]; 645 ASSIGN_4V(tex, 1, 0, 0, 1); 646 647 tex = v[7]->data[texPos]; 648 ASSIGN_4V(tex, 1, 1, 0, 1); 649 650 /* emit 6 tris for the quad strip */ 651 tri.v[0] = v[2]; tri.v[1] = v[1]; tri.v[2] = v[0]; 652 stage->next->tri( stage->next, &tri ); 653 654 tri.v[0] = v[3]; tri.v[1] = v[1]; tri.v[2] = v[2]; 655 stage->next->tri( stage->next, &tri ); 656 657 tri.v[0] = v[4]; tri.v[1] = v[3]; tri.v[2] = v[2]; 658 stage->next->tri( stage->next, &tri ); 659 660 tri.v[0] = v[5]; tri.v[1] = v[3]; tri.v[2] = v[4]; 661 stage->next->tri( stage->next, &tri ); 662 663 tri.v[0] = v[6]; tri.v[1] = v[5]; tri.v[2] = v[4]; 664 stage->next->tri( stage->next, &tri ); 665 666 tri.v[0] = v[7]; tri.v[1] = v[5]; tri.v[2] = v[6]; 667 stage->next->tri( stage->next, &tri ); 668 } 669 670 671 static void 672 aaline_first_line(struct draw_stage *stage, struct prim_header *header) 673 { 674 auto struct aaline_stage *aaline = aaline_stage(stage); 675 struct draw_context *draw = stage->draw; 676 struct pipe_context *pipe = draw->pipe; 677 const struct pipe_rasterizer_state *rast = draw->rasterizer; 678 uint num_samplers; 679 void *r; 680 681 assert(draw->rasterizer->line_smooth); 682 683 if (draw->rasterizer->line_width <= 2.2) 684 aaline->half_line_width = 1.1f; 685 else 686 aaline->half_line_width = 0.5f * draw->rasterizer->line_width; 687 688 /* 689 * Bind (generate) our fragprog, sampler and texture 690 */ 691 if (!bind_aaline_fragment_shader(aaline)) { 692 stage->line = draw_pipe_passthrough_line; 693 stage->line(stage, header); 694 return; 695 } 696 697 /* update vertex attrib info */ 698 aaline->pos_slot = draw_current_shader_position_output(draw);; 699 700 /* allocate the extra post-transformed vertex attribute */ 701 aaline->tex_slot = draw_alloc_extra_vertex_attrib(draw, 702 TGSI_SEMANTIC_GENERIC, 703 aaline->fs->generic_attrib); 704 705 /* how many samplers? */ 706 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 707 num_samplers = MAX2(aaline->num_sampler_views, aaline->num_samplers); 708 num_samplers = MAX2(num_samplers, aaline->fs->sampler_unit + 1); 709 710 aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso; 711 pipe_sampler_view_reference(&aaline->state.sampler_views[aaline->fs->sampler_unit], 712 aaline->sampler_view); 713 714 draw->suspend_flushing = TRUE; 715 aaline->driver_bind_sampler_states(pipe, num_samplers, aaline->state.sampler); 716 aaline->driver_set_sampler_views(pipe, num_samplers, aaline->state.sampler_views); 717 718 /* Disable triangle culling, stippling, unfilled mode etc. */ 719 r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade); 720 pipe->bind_rasterizer_state(pipe, r); 721 722 draw->suspend_flushing = FALSE; 723 724 /* now really draw first line */ 725 stage->line = aaline_line; 726 stage->line(stage, header); 727 } 728 729 730 static void 731 aaline_flush(struct draw_stage *stage, unsigned flags) 732 { 733 struct draw_context *draw = stage->draw; 734 struct aaline_stage *aaline = aaline_stage(stage); 735 struct pipe_context *pipe = draw->pipe; 736 737 stage->line = aaline_first_line; 738 stage->next->flush( stage->next, flags ); 739 740 /* restore original frag shader, texture, sampler state */ 741 draw->suspend_flushing = TRUE; 742 aaline->driver_bind_fs_state(pipe, aaline->fs ? aaline->fs->driver_fs : NULL); 743 aaline->driver_bind_sampler_states(pipe, aaline->num_samplers, 744 aaline->state.sampler); 745 aaline->driver_set_sampler_views(pipe, 746 aaline->num_sampler_views, 747 aaline->state.sampler_views); 748 749 /* restore original rasterizer state */ 750 if (draw->rast_handle) { 751 pipe->bind_rasterizer_state(pipe, draw->rast_handle); 752 } 753 754 draw->suspend_flushing = FALSE; 755 756 draw_remove_extra_vertex_attribs(draw); 757 } 758 759 760 static void 761 aaline_reset_stipple_counter(struct draw_stage *stage) 762 { 763 stage->next->reset_stipple_counter( stage->next ); 764 } 765 766 767 static void 768 aaline_destroy(struct draw_stage *stage) 769 { 770 struct aaline_stage *aaline = aaline_stage(stage); 771 struct pipe_context *pipe = stage->draw->pipe; 772 uint i; 773 774 for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { 775 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 776 } 777 778 if (aaline->sampler_cso) 779 pipe->delete_sampler_state(pipe, aaline->sampler_cso); 780 781 if (aaline->texture) 782 pipe_resource_reference(&aaline->texture, NULL); 783 784 if (aaline->sampler_view) { 785 pipe_sampler_view_reference(&aaline->sampler_view, NULL); 786 } 787 788 draw_free_temp_verts( stage ); 789 790 /* restore the old entry points */ 791 pipe->create_fs_state = aaline->driver_create_fs_state; 792 pipe->bind_fs_state = aaline->driver_bind_fs_state; 793 pipe->delete_fs_state = aaline->driver_delete_fs_state; 794 795 pipe->bind_fragment_sampler_states = aaline->driver_bind_sampler_states; 796 pipe->set_fragment_sampler_views = aaline->driver_set_sampler_views; 797 798 FREE( stage ); 799 } 800 801 802 static struct aaline_stage * 803 draw_aaline_stage(struct draw_context *draw) 804 { 805 struct aaline_stage *aaline = CALLOC_STRUCT(aaline_stage); 806 if (aaline == NULL) 807 return NULL; 808 809 aaline->stage.draw = draw; 810 aaline->stage.name = "aaline"; 811 aaline->stage.next = NULL; 812 aaline->stage.point = draw_pipe_passthrough_point; 813 aaline->stage.line = aaline_first_line; 814 aaline->stage.tri = draw_pipe_passthrough_tri; 815 aaline->stage.flush = aaline_flush; 816 aaline->stage.reset_stipple_counter = aaline_reset_stipple_counter; 817 aaline->stage.destroy = aaline_destroy; 818 819 if (!draw_alloc_temp_verts( &aaline->stage, 8 )) 820 goto fail; 821 822 return aaline; 823 824 fail: 825 if (aaline) 826 aaline->stage.destroy(&aaline->stage); 827 828 return NULL; 829 } 830 831 832 static struct aaline_stage * 833 aaline_stage_from_pipe(struct pipe_context *pipe) 834 { 835 struct draw_context *draw = (struct draw_context *) pipe->draw; 836 return aaline_stage(draw->pipeline.aaline); 837 } 838 839 840 /** 841 * This function overrides the driver's create_fs_state() function and 842 * will typically be called by the state tracker. 843 */ 844 static void * 845 aaline_create_fs_state(struct pipe_context *pipe, 846 const struct pipe_shader_state *fs) 847 { 848 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 849 struct aaline_fragment_shader *aafs = CALLOC_STRUCT(aaline_fragment_shader); 850 851 if (aafs == NULL) 852 return NULL; 853 854 aafs->state.tokens = tgsi_dup_tokens(fs->tokens); 855 856 /* pass-through */ 857 aafs->driver_fs = aaline->driver_create_fs_state(pipe, fs); 858 859 return aafs; 860 } 861 862 863 static void 864 aaline_bind_fs_state(struct pipe_context *pipe, void *fs) 865 { 866 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 867 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 868 869 /* save current */ 870 aaline->fs = aafs; 871 /* pass-through */ 872 aaline->driver_bind_fs_state(pipe, (aafs ? aafs->driver_fs : NULL)); 873 } 874 875 876 static void 877 aaline_delete_fs_state(struct pipe_context *pipe, void *fs) 878 { 879 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 880 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 881 882 /* pass-through */ 883 aaline->driver_delete_fs_state(pipe, aafs->driver_fs); 884 885 if (aafs->aaline_fs) 886 aaline->driver_delete_fs_state(pipe, aafs->aaline_fs); 887 888 FREE((void*)aafs->state.tokens); 889 890 FREE(aafs); 891 } 892 893 894 static void 895 aaline_bind_sampler_states(struct pipe_context *pipe, 896 unsigned num, void **sampler) 897 { 898 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 899 900 /* save current */ 901 memcpy(aaline->state.sampler, sampler, num * sizeof(void *)); 902 aaline->num_samplers = num; 903 904 /* pass-through */ 905 aaline->driver_bind_sampler_states(pipe, num, sampler); 906 } 907 908 909 static void 910 aaline_set_sampler_views(struct pipe_context *pipe, 911 unsigned num, 912 struct pipe_sampler_view **views) 913 { 914 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 915 uint i; 916 917 /* save current */ 918 for (i = 0; i < num; i++) { 919 pipe_sampler_view_reference(&aaline->state.sampler_views[i], views[i]); 920 } 921 for ( ; i < PIPE_MAX_SAMPLERS; i++) { 922 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 923 } 924 aaline->num_sampler_views = num; 925 926 /* pass-through */ 927 aaline->driver_set_sampler_views(pipe, num, views); 928 } 929 930 931 /** 932 * Called by drivers that want to install this AA line prim stage 933 * into the draw module's pipeline. This will not be used if the 934 * hardware has native support for AA lines. 935 */ 936 boolean 937 draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe) 938 { 939 struct aaline_stage *aaline; 940 941 pipe->draw = (void *) draw; 942 943 /* 944 * Create / install AA line drawing / prim stage 945 */ 946 aaline = draw_aaline_stage( draw ); 947 if (!aaline) 948 goto fail; 949 950 /* create special texture, sampler state */ 951 if (!aaline_create_texture(aaline)) 952 goto fail; 953 954 if (!aaline_create_sampler(aaline)) 955 goto fail; 956 957 /* save original driver functions */ 958 aaline->driver_create_fs_state = pipe->create_fs_state; 959 aaline->driver_bind_fs_state = pipe->bind_fs_state; 960 aaline->driver_delete_fs_state = pipe->delete_fs_state; 961 962 aaline->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; 963 aaline->driver_set_sampler_views = pipe->set_fragment_sampler_views; 964 965 /* override the driver's functions */ 966 pipe->create_fs_state = aaline_create_fs_state; 967 pipe->bind_fs_state = aaline_bind_fs_state; 968 pipe->delete_fs_state = aaline_delete_fs_state; 969 970 pipe->bind_fragment_sampler_states = aaline_bind_sampler_states; 971 pipe->set_fragment_sampler_views = aaline_set_sampler_views; 972 973 /* Install once everything is known to be OK: 974 */ 975 draw->pipeline.aaline = &aaline->stage; 976 977 return TRUE; 978 979 fail: 980 if (aaline) 981 aaline->stage.destroy( &aaline->stage ); 982 983 return FALSE; 984 } 985
