1 /************************************************************************** 2 * 3 * Copyright 2007 VMware, Inc. 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 VMWARE 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 53 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_SHADER_SAMPLER_VIEWS]; 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 *, 122 enum pipe_shader_type, unsigned, 123 unsigned, void **); 124 125 void (*driver_set_sampler_views)(struct pipe_context *, 126 enum pipe_shader_type shader, 127 unsigned start, unsigned count, 128 struct pipe_sampler_view **); 129 }; 130 131 132 133 /** 134 * Subclass of tgsi_transform_context, used for transforming the 135 * user's fragment shader to add the special AA instructions. 136 */ 137 struct aa_transform_context { 138 struct tgsi_transform_context base; 139 uint tempsUsed; /**< bitmask */ 140 int colorOutput; /**< which output is the primary color */ 141 uint samplersUsed; /**< bitfield of samplers used */ 142 bool hasSview; 143 int freeSampler; /** an available sampler for the pstipple */ 144 int maxInput, maxGeneric; /**< max input index found */ 145 int colorTemp, texTemp; /**< temp registers */ 146 }; 147 148 149 /** 150 * TGSI declaration transform callback. 151 * Look for a free sampler, a free input attrib, and two free temp regs. 152 */ 153 static void 154 aa_transform_decl(struct tgsi_transform_context *ctx, 155 struct tgsi_full_declaration *decl) 156 { 157 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 158 159 if (decl->Declaration.File == TGSI_FILE_OUTPUT && 160 decl->Semantic.Name == TGSI_SEMANTIC_COLOR && 161 decl->Semantic.Index == 0) { 162 aactx->colorOutput = decl->Range.First; 163 } 164 else if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 165 uint i; 166 for (i = decl->Range.First; 167 i <= decl->Range.Last; i++) { 168 aactx->samplersUsed |= 1u << i; 169 } 170 } 171 else if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) { 172 aactx->hasSview = true; 173 } 174 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 175 if ((int) decl->Range.Last > aactx->maxInput) 176 aactx->maxInput = decl->Range.Last; 177 if (decl->Semantic.Name == TGSI_SEMANTIC_GENERIC && 178 (int) decl->Semantic.Index > aactx->maxGeneric) { 179 aactx->maxGeneric = decl->Semantic.Index; 180 } 181 } 182 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 183 uint i; 184 for (i = decl->Range.First; 185 i <= decl->Range.Last; i++) { 186 aactx->tempsUsed |= (1 << i); 187 } 188 } 189 190 ctx->emit_declaration(ctx, decl); 191 } 192 193 194 /** 195 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 196 */ 197 static int 198 free_bit(uint bitfield) 199 { 200 return ffs(~bitfield) - 1; 201 } 202 203 204 /** 205 * TGSI transform prolog callback. 206 */ 207 static void 208 aa_transform_prolog(struct tgsi_transform_context *ctx) 209 { 210 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 211 uint i; 212 213 STATIC_ASSERT(sizeof(aactx->samplersUsed) * 8 >= PIPE_MAX_SAMPLERS); 214 215 /* find free sampler */ 216 aactx->freeSampler = free_bit(aactx->samplersUsed); 217 if (aactx->freeSampler < 0 || aactx->freeSampler >= PIPE_MAX_SAMPLERS) 218 aactx->freeSampler = PIPE_MAX_SAMPLERS - 1; 219 220 /* find two free temp regs */ 221 for (i = 0; i < 32; i++) { 222 if ((aactx->tempsUsed & (1 << i)) == 0) { 223 /* found a free temp */ 224 if (aactx->colorTemp < 0) 225 aactx->colorTemp = i; 226 else if (aactx->texTemp < 0) 227 aactx->texTemp = i; 228 else 229 break; 230 } 231 } 232 assert(aactx->colorTemp >= 0); 233 assert(aactx->texTemp >= 0); 234 235 /* declare new generic input/texcoord */ 236 tgsi_transform_input_decl(ctx, aactx->maxInput + 1, 237 TGSI_SEMANTIC_GENERIC, aactx->maxGeneric + 1, 238 TGSI_INTERPOLATE_LINEAR); 239 240 /* declare new sampler */ 241 tgsi_transform_sampler_decl(ctx, aactx->freeSampler); 242 243 /* if the src shader has SVIEW decl's for each SAMP decl, we 244 * need to continue the trend and ensure there is a matching 245 * SVIEW for the new SAMP we just created 246 */ 247 if (aactx->hasSview) { 248 tgsi_transform_sampler_view_decl(ctx, 249 aactx->freeSampler, 250 TGSI_TEXTURE_2D, 251 TGSI_RETURN_TYPE_FLOAT); 252 } 253 254 /* declare new temp regs */ 255 tgsi_transform_temp_decl(ctx, aactx->texTemp); 256 tgsi_transform_temp_decl(ctx, aactx->colorTemp); 257 } 258 259 260 /** 261 * TGSI transform epilog callback. 262 */ 263 static void 264 aa_transform_epilog(struct tgsi_transform_context *ctx) 265 { 266 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 267 268 if (aactx->colorOutput != -1) { 269 /* insert texture sampling code for antialiasing. */ 270 271 /* TEX texTemp, input_coord, sampler, 2D */ 272 tgsi_transform_tex_inst(ctx, 273 TGSI_FILE_TEMPORARY, aactx->texTemp, 274 TGSI_FILE_INPUT, aactx->maxInput + 1, 275 TGSI_TEXTURE_2D, aactx->freeSampler); 276 277 /* MOV rgb */ 278 tgsi_transform_op1_inst(ctx, TGSI_OPCODE_MOV, 279 TGSI_FILE_OUTPUT, aactx->colorOutput, 280 TGSI_WRITEMASK_XYZ, 281 TGSI_FILE_TEMPORARY, aactx->colorTemp); 282 283 /* MUL alpha */ 284 tgsi_transform_op2_inst(ctx, TGSI_OPCODE_MUL, 285 TGSI_FILE_OUTPUT, aactx->colorOutput, 286 TGSI_WRITEMASK_W, 287 TGSI_FILE_TEMPORARY, aactx->colorTemp, 288 TGSI_FILE_TEMPORARY, aactx->texTemp, false); 289 } 290 } 291 292 293 /** 294 * TGSI instruction transform callback. 295 * Replace writes to result.color w/ a temp reg. 296 */ 297 static void 298 aa_transform_inst(struct tgsi_transform_context *ctx, 299 struct tgsi_full_instruction *inst) 300 { 301 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 302 uint i; 303 304 /* 305 * Look for writes to result.color and replace with colorTemp reg. 306 */ 307 for (i = 0; i < inst->Instruction.NumDstRegs; i++) { 308 struct tgsi_full_dst_register *dst = &inst->Dst[i]; 309 if (dst->Register.File == TGSI_FILE_OUTPUT && 310 dst->Register.Index == aactx->colorOutput) { 311 dst->Register.File = TGSI_FILE_TEMPORARY; 312 dst->Register.Index = aactx->colorTemp; 313 } 314 } 315 316 ctx->emit_instruction(ctx, inst); 317 } 318 319 320 /** 321 * Generate the frag shader we'll use for drawing AA lines. 322 * This will be the user's shader plus some texture/modulate instructions. 323 */ 324 static boolean 325 generate_aaline_fs(struct aaline_stage *aaline) 326 { 327 struct pipe_context *pipe = aaline->stage.draw->pipe; 328 const struct pipe_shader_state *orig_fs = &aaline->fs->state; 329 struct pipe_shader_state aaline_fs; 330 struct aa_transform_context transform; 331 const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; 332 333 aaline_fs = *orig_fs; /* copy to init */ 334 aaline_fs.tokens = tgsi_alloc_tokens(newLen); 335 if (aaline_fs.tokens == NULL) 336 return FALSE; 337 338 memset(&transform, 0, sizeof(transform)); 339 transform.colorOutput = -1; 340 transform.maxInput = -1; 341 transform.maxGeneric = -1; 342 transform.colorTemp = -1; 343 transform.texTemp = -1; 344 transform.base.prolog = aa_transform_prolog; 345 transform.base.epilog = aa_transform_epilog; 346 transform.base.transform_instruction = aa_transform_inst; 347 transform.base.transform_declaration = aa_transform_decl; 348 349 tgsi_transform_shader(orig_fs->tokens, 350 (struct tgsi_token *) aaline_fs.tokens, 351 newLen, &transform.base); 352 353 #if 0 /* DEBUG */ 354 debug_printf("draw_aaline, orig shader:\n"); 355 tgsi_dump(orig_fs->tokens, 0); 356 debug_printf("draw_aaline, new shader:\n"); 357 tgsi_dump(aaline_fs.tokens, 0); 358 #endif 359 360 aaline->fs->sampler_unit = transform.freeSampler; 361 362 aaline->fs->aaline_fs = aaline->driver_create_fs_state(pipe, &aaline_fs); 363 if (aaline->fs->aaline_fs == NULL) 364 goto fail; 365 366 aaline->fs->generic_attrib = transform.maxGeneric + 1; 367 FREE((void *)aaline_fs.tokens); 368 return TRUE; 369 370 fail: 371 FREE((void *)aaline_fs.tokens); 372 return FALSE; 373 } 374 375 376 /** 377 * Create the texture map we'll use for antialiasing the lines. 378 */ 379 static boolean 380 aaline_create_texture(struct aaline_stage *aaline) 381 { 382 struct pipe_context *pipe = aaline->stage.draw->pipe; 383 struct pipe_screen *screen = pipe->screen; 384 struct pipe_resource texTemp; 385 struct pipe_sampler_view viewTempl; 386 uint level; 387 388 memset(&texTemp, 0, sizeof(texTemp)); 389 texTemp.target = PIPE_TEXTURE_2D; 390 texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ 391 texTemp.last_level = MAX_TEXTURE_LEVEL; 392 texTemp.width0 = 1 << TEXTURE_SIZE_LOG2; 393 texTemp.height0 = 1 << TEXTURE_SIZE_LOG2; 394 texTemp.depth0 = 1; 395 texTemp.array_size = 1; 396 texTemp.bind = PIPE_BIND_SAMPLER_VIEW; 397 398 aaline->texture = screen->resource_create(screen, &texTemp); 399 if (!aaline->texture) 400 return FALSE; 401 402 u_sampler_view_default_template(&viewTempl, 403 aaline->texture, 404 aaline->texture->format); 405 aaline->sampler_view = pipe->create_sampler_view(pipe, 406 aaline->texture, 407 &viewTempl); 408 if (!aaline->sampler_view) { 409 return FALSE; 410 } 411 412 /* Fill in mipmap images. 413 * Basically each level is solid opaque, except for the outermost 414 * texels which are zero. Special case the 1x1 and 2x2 levels 415 * (though, those levels shouldn't be used - see the max_lod setting). 416 */ 417 for (level = 0; level <= MAX_TEXTURE_LEVEL; level++) { 418 struct pipe_transfer *transfer; 419 struct pipe_box box; 420 const uint size = u_minify(aaline->texture->width0, level); 421 ubyte *data; 422 uint i, j; 423 424 assert(aaline->texture->width0 == aaline->texture->height0); 425 426 u_box_origin_2d( size, size, &box ); 427 428 /* This texture is new, no need to flush. 429 */ 430 data = pipe->transfer_map(pipe, 431 aaline->texture, 432 level, 433 PIPE_TRANSFER_WRITE, 434 &box, &transfer); 435 436 if (!data) 437 return FALSE; 438 439 for (i = 0; i < size; i++) { 440 for (j = 0; j < size; j++) { 441 ubyte d; 442 if (size == 1) { 443 d = 255; 444 } 445 else if (size == 2) { 446 d = 200; /* tuneable */ 447 } 448 else if (i == 0 || j == 0 || i == size - 1 || j == size - 1) { 449 d = 35; /* edge texel */ 450 } 451 else { 452 d = 255; 453 } 454 data[i * transfer->stride + j] = d; 455 } 456 } 457 458 /* unmap */ 459 pipe->transfer_unmap(pipe, transfer); 460 } 461 return TRUE; 462 } 463 464 465 /** 466 * Create the sampler CSO that'll be used for antialiasing. 467 * By using a mipmapped texture, we don't have to generate a different 468 * texture image for each line size. 469 */ 470 static boolean 471 aaline_create_sampler(struct aaline_stage *aaline) 472 { 473 struct pipe_sampler_state sampler; 474 struct pipe_context *pipe = aaline->stage.draw->pipe; 475 476 memset(&sampler, 0, sizeof(sampler)); 477 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 478 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 479 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 480 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_LINEAR; 481 sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR; 482 sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR; 483 sampler.normalized_coords = 1; 484 sampler.min_lod = 0.0f; 485 sampler.max_lod = MAX_TEXTURE_LEVEL; 486 487 aaline->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 488 if (aaline->sampler_cso == NULL) 489 return FALSE; 490 491 return TRUE; 492 } 493 494 495 /** 496 * When we're about to draw our first AA line in a batch, this function is 497 * called to tell the driver to bind our modified fragment shader. 498 */ 499 static boolean 500 bind_aaline_fragment_shader(struct aaline_stage *aaline) 501 { 502 struct draw_context *draw = aaline->stage.draw; 503 struct pipe_context *pipe = draw->pipe; 504 505 if (!aaline->fs->aaline_fs && 506 !generate_aaline_fs(aaline)) 507 return FALSE; 508 509 draw->suspend_flushing = TRUE; 510 aaline->driver_bind_fs_state(pipe, aaline->fs->aaline_fs); 511 draw->suspend_flushing = FALSE; 512 513 return TRUE; 514 } 515 516 517 518 static inline struct aaline_stage * 519 aaline_stage( struct draw_stage *stage ) 520 { 521 return (struct aaline_stage *) stage; 522 } 523 524 525 /** 526 * Draw a wide line by drawing a quad, using geometry which will 527 * fullfill GL's antialiased line requirements. 528 */ 529 static void 530 aaline_line(struct draw_stage *stage, struct prim_header *header) 531 { 532 const struct aaline_stage *aaline = aaline_stage(stage); 533 const float half_width = aaline->half_line_width; 534 struct prim_header tri; 535 struct vertex_header *v[8]; 536 uint texPos = aaline->tex_slot; 537 uint posPos = aaline->pos_slot; 538 float *pos, *tex; 539 float dx = header->v[1]->data[posPos][0] - header->v[0]->data[posPos][0]; 540 float dy = header->v[1]->data[posPos][1] - header->v[0]->data[posPos][1]; 541 double a = atan2(dy, dx); 542 float c_a = (float) cos(a), s_a = (float) sin(a); 543 uint i; 544 545 /* XXX the ends of lines aren't quite perfect yet, but probably passable */ 546 dx = 0.5F * half_width; 547 dy = half_width; 548 549 /* allocate/dup new verts */ 550 for (i = 0; i < 8; i++) { 551 v[i] = dup_vert(stage, header->v[i/4], i); 552 } 553 554 /* 555 * Quad strip for line from v0 to v1 (*=endpoints): 556 * 557 * 1 3 5 7 558 * +---+---------------------+---+ 559 * | | 560 * | *v0 v1* | 561 * | | 562 * +---+---------------------+---+ 563 * 0 2 4 6 564 */ 565 566 /* new verts */ 567 pos = v[0]->data[posPos]; 568 pos[0] += (-dx * c_a - dy * s_a); 569 pos[1] += (-dx * s_a + dy * c_a); 570 571 pos = v[1]->data[posPos]; 572 pos[0] += (-dx * c_a - -dy * s_a); 573 pos[1] += (-dx * s_a + -dy * c_a); 574 575 pos = v[2]->data[posPos]; 576 pos[0] += ( dx * c_a - dy * s_a); 577 pos[1] += ( dx * s_a + dy * c_a); 578 579 pos = v[3]->data[posPos]; 580 pos[0] += ( dx * c_a - -dy * s_a); 581 pos[1] += ( dx * s_a + -dy * c_a); 582 583 pos = v[4]->data[posPos]; 584 pos[0] += (-dx * c_a - dy * s_a); 585 pos[1] += (-dx * s_a + dy * c_a); 586 587 pos = v[5]->data[posPos]; 588 pos[0] += (-dx * c_a - -dy * s_a); 589 pos[1] += (-dx * s_a + -dy * c_a); 590 591 pos = v[6]->data[posPos]; 592 pos[0] += ( dx * c_a - dy * s_a); 593 pos[1] += ( dx * s_a + dy * c_a); 594 595 pos = v[7]->data[posPos]; 596 pos[0] += ( dx * c_a - -dy * s_a); 597 pos[1] += ( dx * s_a + -dy * c_a); 598 599 /* new texcoords */ 600 tex = v[0]->data[texPos]; 601 ASSIGN_4V(tex, 0, 0, 0, 1); 602 603 tex = v[1]->data[texPos]; 604 ASSIGN_4V(tex, 0, 1, 0, 1); 605 606 tex = v[2]->data[texPos]; 607 ASSIGN_4V(tex, .5, 0, 0, 1); 608 609 tex = v[3]->data[texPos]; 610 ASSIGN_4V(tex, .5, 1, 0, 1); 611 612 tex = v[4]->data[texPos]; 613 ASSIGN_4V(tex, .5, 0, 0, 1); 614 615 tex = v[5]->data[texPos]; 616 ASSIGN_4V(tex, .5, 1, 0, 1); 617 618 tex = v[6]->data[texPos]; 619 ASSIGN_4V(tex, 1, 0, 0, 1); 620 621 tex = v[7]->data[texPos]; 622 ASSIGN_4V(tex, 1, 1, 0, 1); 623 624 /* emit 6 tris for the quad strip */ 625 tri.v[0] = v[2]; tri.v[1] = v[1]; tri.v[2] = v[0]; 626 stage->next->tri( stage->next, &tri ); 627 628 tri.v[0] = v[3]; tri.v[1] = v[1]; tri.v[2] = v[2]; 629 stage->next->tri( stage->next, &tri ); 630 631 tri.v[0] = v[4]; tri.v[1] = v[3]; tri.v[2] = v[2]; 632 stage->next->tri( stage->next, &tri ); 633 634 tri.v[0] = v[5]; tri.v[1] = v[3]; tri.v[2] = v[4]; 635 stage->next->tri( stage->next, &tri ); 636 637 tri.v[0] = v[6]; tri.v[1] = v[5]; tri.v[2] = v[4]; 638 stage->next->tri( stage->next, &tri ); 639 640 tri.v[0] = v[7]; tri.v[1] = v[5]; tri.v[2] = v[6]; 641 stage->next->tri( stage->next, &tri ); 642 } 643 644 645 static void 646 aaline_first_line(struct draw_stage *stage, struct prim_header *header) 647 { 648 auto struct aaline_stage *aaline = aaline_stage(stage); 649 struct draw_context *draw = stage->draw; 650 struct pipe_context *pipe = draw->pipe; 651 const struct pipe_rasterizer_state *rast = draw->rasterizer; 652 uint num_samplers; 653 uint num_sampler_views; 654 void *r; 655 656 assert(draw->rasterizer->line_smooth); 657 658 if (draw->rasterizer->line_width <= 2.2) 659 aaline->half_line_width = 1.1f; 660 else 661 aaline->half_line_width = 0.5f * draw->rasterizer->line_width; 662 663 /* 664 * Bind (generate) our fragprog, sampler and texture 665 */ 666 if (!bind_aaline_fragment_shader(aaline)) { 667 stage->line = draw_pipe_passthrough_line; 668 stage->line(stage, header); 669 return; 670 } 671 672 draw_aaline_prepare_outputs(draw, draw->pipeline.aaline); 673 674 /* how many samplers? */ 675 /* we'll use sampler/texture[aaline->sampler_unit] for the alpha texture */ 676 num_samplers = MAX2(aaline->num_samplers, aaline->fs->sampler_unit + 1); 677 num_sampler_views = MAX2(num_samplers, aaline->num_sampler_views); 678 679 aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso; 680 pipe_sampler_view_reference(&aaline->state.sampler_views[aaline->fs->sampler_unit], 681 aaline->sampler_view); 682 683 draw->suspend_flushing = TRUE; 684 685 aaline->driver_bind_sampler_states(pipe, PIPE_SHADER_FRAGMENT, 0, 686 num_samplers, aaline->state.sampler); 687 688 aaline->driver_set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, 0, 689 num_sampler_views, aaline->state.sampler_views); 690 691 /* Disable triangle culling, stippling, unfilled mode etc. */ 692 r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade); 693 pipe->bind_rasterizer_state(pipe, r); 694 695 draw->suspend_flushing = FALSE; 696 697 /* now really draw first line */ 698 stage->line = aaline_line; 699 stage->line(stage, header); 700 } 701 702 703 static void 704 aaline_flush(struct draw_stage *stage, unsigned flags) 705 { 706 struct draw_context *draw = stage->draw; 707 struct aaline_stage *aaline = aaline_stage(stage); 708 struct pipe_context *pipe = draw->pipe; 709 710 stage->line = aaline_first_line; 711 stage->next->flush( stage->next, flags ); 712 713 /* restore original frag shader, texture, sampler state */ 714 draw->suspend_flushing = TRUE; 715 aaline->driver_bind_fs_state(pipe, aaline->fs ? aaline->fs->driver_fs : NULL); 716 717 aaline->driver_bind_sampler_states(pipe, PIPE_SHADER_FRAGMENT, 0, 718 aaline->num_samplers, 719 aaline->state.sampler); 720 721 aaline->driver_set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, 0, 722 aaline->num_samplers, 723 aaline->state.sampler_views); 724 725 /* restore original rasterizer state */ 726 if (draw->rast_handle) { 727 pipe->bind_rasterizer_state(pipe, draw->rast_handle); 728 } 729 730 draw->suspend_flushing = FALSE; 731 732 draw_remove_extra_vertex_attribs(draw); 733 } 734 735 736 static void 737 aaline_reset_stipple_counter(struct draw_stage *stage) 738 { 739 stage->next->reset_stipple_counter( stage->next ); 740 } 741 742 743 static void 744 aaline_destroy(struct draw_stage *stage) 745 { 746 struct aaline_stage *aaline = aaline_stage(stage); 747 struct pipe_context *pipe = stage->draw->pipe; 748 uint i; 749 750 for (i = 0; i < PIPE_MAX_SHADER_SAMPLER_VIEWS; i++) { 751 pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); 752 } 753 754 if (aaline->sampler_cso) 755 pipe->delete_sampler_state(pipe, aaline->sampler_cso); 756 757 if (aaline->texture) 758 pipe_resource_reference(&aaline->texture, NULL); 759 760 if (aaline->sampler_view) { 761 pipe_sampler_view_reference(&aaline->sampler_view, NULL); 762 } 763 764 draw_free_temp_verts( stage ); 765 766 /* restore the old entry points */ 767 pipe->create_fs_state = aaline->driver_create_fs_state; 768 pipe->bind_fs_state = aaline->driver_bind_fs_state; 769 pipe->delete_fs_state = aaline->driver_delete_fs_state; 770 771 pipe->bind_sampler_states = aaline->driver_bind_sampler_states; 772 pipe->set_sampler_views = aaline->driver_set_sampler_views; 773 774 FREE( stage ); 775 } 776 777 778 static struct aaline_stage * 779 draw_aaline_stage(struct draw_context *draw) 780 { 781 struct aaline_stage *aaline = CALLOC_STRUCT(aaline_stage); 782 if (!aaline) 783 return NULL; 784 785 aaline->stage.draw = draw; 786 aaline->stage.name = "aaline"; 787 aaline->stage.next = NULL; 788 aaline->stage.point = draw_pipe_passthrough_point; 789 aaline->stage.line = aaline_first_line; 790 aaline->stage.tri = draw_pipe_passthrough_tri; 791 aaline->stage.flush = aaline_flush; 792 aaline->stage.reset_stipple_counter = aaline_reset_stipple_counter; 793 aaline->stage.destroy = aaline_destroy; 794 795 if (!draw_alloc_temp_verts( &aaline->stage, 8 )) 796 goto fail; 797 798 return aaline; 799 800 fail: 801 aaline->stage.destroy(&aaline->stage); 802 803 return NULL; 804 } 805 806 807 static struct aaline_stage * 808 aaline_stage_from_pipe(struct pipe_context *pipe) 809 { 810 struct draw_context *draw = (struct draw_context *) pipe->draw; 811 812 if (draw) { 813 return aaline_stage(draw->pipeline.aaline); 814 } else { 815 return NULL; 816 } 817 } 818 819 820 /** 821 * This function overrides the driver's create_fs_state() function and 822 * will typically be called by the state tracker. 823 */ 824 static void * 825 aaline_create_fs_state(struct pipe_context *pipe, 826 const struct pipe_shader_state *fs) 827 { 828 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 829 struct aaline_fragment_shader *aafs = NULL; 830 831 if (!aaline) 832 return NULL; 833 834 aafs = CALLOC_STRUCT(aaline_fragment_shader); 835 836 if (!aafs) 837 return NULL; 838 839 aafs->state.tokens = tgsi_dup_tokens(fs->tokens); 840 841 /* pass-through */ 842 aafs->driver_fs = aaline->driver_create_fs_state(pipe, fs); 843 844 return aafs; 845 } 846 847 848 static void 849 aaline_bind_fs_state(struct pipe_context *pipe, void *fs) 850 { 851 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 852 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 853 854 if (!aaline) { 855 return; 856 } 857 858 /* save current */ 859 aaline->fs = aafs; 860 /* pass-through */ 861 aaline->driver_bind_fs_state(pipe, (aafs ? aafs->driver_fs : NULL)); 862 } 863 864 865 static void 866 aaline_delete_fs_state(struct pipe_context *pipe, void *fs) 867 { 868 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 869 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 870 871 if (!aafs) { 872 return; 873 } 874 875 if (aaline) { 876 /* pass-through */ 877 aaline->driver_delete_fs_state(pipe, aafs->driver_fs); 878 879 if (aafs->aaline_fs) 880 aaline->driver_delete_fs_state(pipe, aafs->aaline_fs); 881 } 882 883 FREE((void*)aafs->state.tokens); 884 FREE(aafs); 885 } 886 887 888 static void 889 aaline_bind_sampler_states(struct pipe_context *pipe, 890 enum pipe_shader_type shader, 891 unsigned start, unsigned num, void **sampler) 892 { 893 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 894 895 assert(start == 0); 896 897 if (!aaline) { 898 return; 899 } 900 901 if (shader == PIPE_SHADER_FRAGMENT) { 902 /* save current */ 903 memcpy(aaline->state.sampler, sampler, num * sizeof(void *)); 904 aaline->num_samplers = num; 905 } 906 907 /* pass-through */ 908 aaline->driver_bind_sampler_states(pipe, shader, start, num, sampler); 909 } 910 911 912 static void 913 aaline_set_sampler_views(struct pipe_context *pipe, 914 enum pipe_shader_type shader, 915 unsigned start, unsigned num, 916 struct pipe_sampler_view **views) 917 { 918 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 919 uint i; 920 921 if (!aaline) { 922 return; 923 } 924 925 if (shader == PIPE_SHADER_FRAGMENT) { 926 /* save current */ 927 for (i = 0; i < num; i++) { 928 pipe_sampler_view_reference(&aaline->state.sampler_views[start + i], 929 views[i]); 930 } 931 aaline->num_sampler_views = num; 932 } 933 934 /* pass-through */ 935 aaline->driver_set_sampler_views(pipe, shader, start, num, views); 936 } 937 938 939 void 940 draw_aaline_prepare_outputs(struct draw_context *draw, 941 struct draw_stage *stage) 942 { 943 struct aaline_stage *aaline = aaline_stage(stage); 944 const struct pipe_rasterizer_state *rast = draw->rasterizer; 945 946 /* update vertex attrib info */ 947 aaline->pos_slot = draw_current_shader_position_output(draw); 948 949 if (!rast->line_smooth) 950 return; 951 952 /* allocate the extra post-transformed vertex attribute */ 953 aaline->tex_slot = draw_alloc_extra_vertex_attrib(draw, 954 TGSI_SEMANTIC_GENERIC, 955 aaline->fs->generic_attrib); 956 } 957 958 /** 959 * Called by drivers that want to install this AA line prim stage 960 * into the draw module's pipeline. This will not be used if the 961 * hardware has native support for AA lines. 962 */ 963 boolean 964 draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe) 965 { 966 struct aaline_stage *aaline; 967 968 pipe->draw = (void *) draw; 969 970 /* 971 * Create / install AA line drawing / prim stage 972 */ 973 aaline = draw_aaline_stage( draw ); 974 if (!aaline) 975 goto fail; 976 977 /* save original driver functions */ 978 aaline->driver_create_fs_state = pipe->create_fs_state; 979 aaline->driver_bind_fs_state = pipe->bind_fs_state; 980 aaline->driver_delete_fs_state = pipe->delete_fs_state; 981 982 aaline->driver_bind_sampler_states = pipe->bind_sampler_states; 983 aaline->driver_set_sampler_views = pipe->set_sampler_views; 984 985 /* create special texture, sampler state */ 986 if (!aaline_create_texture(aaline)) 987 goto fail; 988 989 if (!aaline_create_sampler(aaline)) 990 goto fail; 991 992 /* override the driver's functions */ 993 pipe->create_fs_state = aaline_create_fs_state; 994 pipe->bind_fs_state = aaline_bind_fs_state; 995 pipe->delete_fs_state = aaline_delete_fs_state; 996 997 pipe->bind_sampler_states = aaline_bind_sampler_states; 998 pipe->set_sampler_views = aaline_set_sampler_views; 999 1000 /* Install once everything is known to be OK: 1001 */ 1002 draw->pipeline.aaline = &aaline->stage; 1003 1004 return TRUE; 1005 1006 fail: 1007 if (aaline) 1008 aaline->stage.destroy( &aaline->stage ); 1009 1010 return FALSE; 1011 } 1012
