draw_pipe_aaline.c revision 507fbe2d327efb8d608ce8e07436b97321560808
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_util.h" 36#include "pipe/p_inlines.h" 37#include "pipe/p_context.h" 38#include "pipe/p_defines.h" 39#include "pipe/p_shader_tokens.h" 40 41#include "tgsi/util/tgsi_transform.h" 42#include "tgsi/util/tgsi_dump.h" 43 44#include "draw_context.h" 45#include "draw_private.h" 46#include "draw_pipe.h" 47 48 49/** 50 * Max texture level for the alpha texture used for antialiasing 51 */ 52#define MAX_TEXTURE_LEVEL 5 /* 32 x 32 */ 53 54 55/** 56 * Subclass of pipe_shader_state to carry extra fragment shader info. 57 */ 58struct aaline_fragment_shader 59{ 60 struct pipe_shader_state state; 61 void *driver_fs; 62 void *aaline_fs; 63 void *aapoint_fs; /* not yet */ 64 void *sprite_fs; /* not yet */ 65 uint sampler_unit; 66 int generic_attrib; /**< texcoord/generic used for texture */ 67}; 68 69 70/** 71 * Subclass of draw_stage 72 */ 73struct aaline_stage 74{ 75 struct draw_stage stage; 76 77 float half_line_width; 78 79 /** For AA lines, this is the vertex attrib slot for the new texcoords */ 80 uint tex_slot; 81 82 void *sampler_cso; 83 struct pipe_texture *texture; 84 uint num_samplers; 85 uint num_textures; 86 87 88 /* 89 * Currently bound state 90 */ 91 struct aaline_fragment_shader *fs; 92 struct { 93 void *sampler[PIPE_MAX_SAMPLERS]; 94 struct pipe_texture *texture[PIPE_MAX_SAMPLERS]; 95 } state; 96 97 /* 98 * Driver interface/override functions 99 */ 100 void * (*driver_create_fs_state)(struct pipe_context *, 101 const struct pipe_shader_state *); 102 void (*driver_bind_fs_state)(struct pipe_context *, void *); 103 void (*driver_delete_fs_state)(struct pipe_context *, void *); 104 105 void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, 106 void **); 107 void (*driver_set_sampler_textures)(struct pipe_context *, unsigned, 108 struct pipe_texture **); 109 110 struct pipe_context *pipe; 111}; 112 113 114 115/** 116 * Subclass of tgsi_transform_context, used for transforming the 117 * user's fragment shader to add the special AA instructions. 118 */ 119struct aa_transform_context { 120 struct tgsi_transform_context base; 121 uint tempsUsed; /**< bitmask */ 122 int colorOutput; /**< which output is the primary color */ 123 uint samplersUsed; /**< bitfield of samplers used */ 124 int freeSampler; /** an available sampler for the pstipple */ 125 int maxInput, maxGeneric; /**< max input index found */ 126 int colorTemp, texTemp; /**< temp registers */ 127 boolean firstInstruction; 128}; 129 130 131/** 132 * TGSI declaration transform callback. 133 * Look for a free sampler, a free input attrib, and two free temp regs. 134 */ 135static void 136aa_transform_decl(struct tgsi_transform_context *ctx, 137 struct tgsi_full_declaration *decl) 138{ 139 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 140 141 if (decl->Declaration.File == TGSI_FILE_OUTPUT && 142 decl->Semantic.SemanticName == TGSI_SEMANTIC_COLOR && 143 decl->Semantic.SemanticIndex == 0) { 144 aactx->colorOutput = decl->u.DeclarationRange.First; 145 } 146 else if (decl->Declaration.File == TGSI_FILE_SAMPLER) { 147 uint i; 148 for (i = decl->u.DeclarationRange.First; 149 i <= decl->u.DeclarationRange.Last; i++) { 150 aactx->samplersUsed |= 1 << i; 151 } 152 } 153 else if (decl->Declaration.File == TGSI_FILE_INPUT) { 154 if ((int) decl->u.DeclarationRange.Last > aactx->maxInput) 155 aactx->maxInput = decl->u.DeclarationRange.Last; 156 if (decl->Semantic.SemanticName == TGSI_SEMANTIC_GENERIC && 157 (int) decl->Semantic.SemanticIndex > aactx->maxGeneric) { 158 aactx->maxGeneric = decl->Semantic.SemanticIndex; 159 } 160 } 161 else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { 162 uint i; 163 for (i = decl->u.DeclarationRange.First; 164 i <= decl->u.DeclarationRange.Last; i++) { 165 aactx->tempsUsed |= (1 << i); 166 } 167 } 168 169 ctx->emit_declaration(ctx, decl); 170} 171 172 173/** 174 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. 175 */ 176static int 177free_bit(uint bitfield) 178{ 179 int i; 180 for (i = 0; i < 32; i++) { 181 if ((bitfield & (1 << i)) == 0) 182 return i; 183 } 184 return -1; 185} 186 187 188/** 189 * TGSI instruction transform callback. 190 * Replace writes to result.color w/ a temp reg. 191 * Upon END instruction, insert texture sampling code for antialiasing. 192 */ 193static void 194aa_transform_inst(struct tgsi_transform_context *ctx, 195 struct tgsi_full_instruction *inst) 196{ 197 struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; 198 199 if (aactx->firstInstruction) { 200 /* emit our new declarations before the first instruction */ 201 202 struct tgsi_full_declaration decl; 203 uint i; 204 205 /* find free sampler */ 206 aactx->freeSampler = free_bit(aactx->samplersUsed); 207 if (aactx->freeSampler >= PIPE_MAX_SAMPLERS) 208 aactx->freeSampler = PIPE_MAX_SAMPLERS - 1; 209 210 /* find two free temp regs */ 211 for (i = 0; i < 32; i++) { 212 if ((aactx->tempsUsed & (1 << i)) == 0) { 213 /* found a free temp */ 214 if (aactx->colorTemp < 0) 215 aactx->colorTemp = i; 216 else if (aactx->texTemp < 0) 217 aactx->texTemp = i; 218 else 219 break; 220 } 221 } 222 assert(aactx->colorTemp >= 0); 223 assert(aactx->texTemp >= 0); 224 225 /* declare new generic input/texcoord */ 226 decl = tgsi_default_full_declaration(); 227 decl.Declaration.File = TGSI_FILE_INPUT; 228 decl.Declaration.Semantic = 1; 229 decl.Semantic.SemanticName = TGSI_SEMANTIC_GENERIC; 230 decl.Semantic.SemanticIndex = aactx->maxGeneric + 1; 231 decl.Declaration.Interpolate = 1; 232 /* XXX this could be linear... */ 233 decl.Interpolation.Interpolate = TGSI_INTERPOLATE_PERSPECTIVE; 234 decl.u.DeclarationRange.First = 235 decl.u.DeclarationRange.Last = aactx->maxInput + 1; 236 ctx->emit_declaration(ctx, &decl); 237 238 /* declare new sampler */ 239 decl = tgsi_default_full_declaration(); 240 decl.Declaration.File = TGSI_FILE_SAMPLER; 241 decl.u.DeclarationRange.First = 242 decl.u.DeclarationRange.Last = aactx->freeSampler; 243 ctx->emit_declaration(ctx, &decl); 244 245 /* declare new temp regs */ 246 decl = tgsi_default_full_declaration(); 247 decl.Declaration.File = TGSI_FILE_TEMPORARY; 248 decl.u.DeclarationRange.First = 249 decl.u.DeclarationRange.Last = aactx->texTemp; 250 ctx->emit_declaration(ctx, &decl); 251 252 decl = tgsi_default_full_declaration(); 253 decl.Declaration.File = TGSI_FILE_TEMPORARY; 254 decl.u.DeclarationRange.First = 255 decl.u.DeclarationRange.Last = aactx->colorTemp; 256 ctx->emit_declaration(ctx, &decl); 257 258 aactx->firstInstruction = FALSE; 259 } 260 261 if (inst->Instruction.Opcode == TGSI_OPCODE_END && 262 aactx->colorOutput != -1) { 263 struct tgsi_full_instruction newInst; 264 265 /* TEX */ 266 newInst = tgsi_default_full_instruction(); 267 newInst.Instruction.Opcode = TGSI_OPCODE_TEX; 268 newInst.Instruction.NumDstRegs = 1; 269 newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY; 270 newInst.FullDstRegisters[0].DstRegister.Index = aactx->texTemp; 271 newInst.Instruction.NumSrcRegs = 2; 272 newInst.InstructionExtTexture.Texture = TGSI_TEXTURE_2D; 273 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT; 274 newInst.FullSrcRegisters[0].SrcRegister.Index = aactx->maxInput + 1; 275 newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER; 276 newInst.FullSrcRegisters[1].SrcRegister.Index = aactx->freeSampler; 277 278 ctx->emit_instruction(ctx, &newInst); 279 280 /* MOV rgb */ 281 newInst = tgsi_default_full_instruction(); 282 newInst.Instruction.Opcode = TGSI_OPCODE_MOV; 283 newInst.Instruction.NumDstRegs = 1; 284 newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_OUTPUT; 285 newInst.FullDstRegisters[0].DstRegister.Index = aactx->colorOutput; 286 newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_XYZ; 287 newInst.Instruction.NumSrcRegs = 1; 288 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY; 289 newInst.FullSrcRegisters[0].SrcRegister.Index = aactx->colorTemp; 290 ctx->emit_instruction(ctx, &newInst); 291 292 /* MUL alpha */ 293 newInst = tgsi_default_full_instruction(); 294 newInst.Instruction.Opcode = TGSI_OPCODE_MUL; 295 newInst.Instruction.NumDstRegs = 1; 296 newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_OUTPUT; 297 newInst.FullDstRegisters[0].DstRegister.Index = aactx->colorOutput; 298 newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_W; 299 newInst.Instruction.NumSrcRegs = 2; 300 newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY; 301 newInst.FullSrcRegisters[0].SrcRegister.Index = aactx->colorTemp; 302 newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_TEMPORARY; 303 newInst.FullSrcRegisters[1].SrcRegister.Index = aactx->texTemp; 304 ctx->emit_instruction(ctx, &newInst); 305 306 /* END */ 307 newInst = tgsi_default_full_instruction(); 308 newInst.Instruction.Opcode = TGSI_OPCODE_END; 309 newInst.Instruction.NumDstRegs = 0; 310 newInst.Instruction.NumSrcRegs = 0; 311 ctx->emit_instruction(ctx, &newInst); 312 } 313 else { 314 /* Not an END instruction. 315 * Look for writes to result.color and replace with colorTemp reg. 316 */ 317 uint i; 318 319 for (i = 0; i < inst->Instruction.NumDstRegs; i++) { 320 struct tgsi_full_dst_register *dst = &inst->FullDstRegisters[i]; 321 if (dst->DstRegister.File == TGSI_FILE_OUTPUT && 322 dst->DstRegister.Index == aactx->colorOutput) { 323 dst->DstRegister.File = TGSI_FILE_TEMPORARY; 324 dst->DstRegister.Index = aactx->colorTemp; 325 } 326 } 327 328 ctx->emit_instruction(ctx, inst); 329 } 330} 331 332 333/** 334 * Generate the frag shader we'll use for drawing AA lines. 335 * This will be the user's shader plus some texture/modulate instructions. 336 */ 337static void 338generate_aaline_fs(struct aaline_stage *aaline) 339{ 340 const struct pipe_shader_state *orig_fs = &aaline->fs->state; 341 //struct draw_context *draw = aaline->stage.draw; 342 struct pipe_shader_state aaline_fs; 343 struct aa_transform_context transform; 344 345#define MAX 1000 346 347 aaline_fs = *orig_fs; /* copy to init */ 348 aaline_fs.tokens = MALLOC(sizeof(struct tgsi_token) * MAX); 349 350 memset(&transform, 0, sizeof(transform)); 351 transform.colorOutput = -1; 352 transform.maxInput = -1; 353 transform.maxGeneric = -1; 354 transform.colorTemp = -1; 355 transform.texTemp = -1; 356 transform.firstInstruction = TRUE; 357 transform.base.transform_instruction = aa_transform_inst; 358 transform.base.transform_declaration = aa_transform_decl; 359 360 tgsi_transform_shader(orig_fs->tokens, 361 (struct tgsi_token *) aaline_fs.tokens, 362 MAX, &transform.base); 363 364#if 0 /* DEBUG */ 365 tgsi_dump(orig_fs->tokens, 0); 366 tgsi_dump(aaline_fs.tokens, 0); 367#endif 368 369 aaline->fs->sampler_unit = transform.freeSampler; 370 371 aaline->fs->aaline_fs 372 = aaline->driver_create_fs_state(aaline->pipe, &aaline_fs); 373 374 aaline->fs->generic_attrib = transform.maxGeneric + 1; 375} 376 377 378/** 379 * Create the texture map we'll use for antialiasing the lines. 380 */ 381static void 382aaline_create_texture(struct aaline_stage *aaline) 383{ 384 struct pipe_context *pipe = aaline->pipe; 385 struct pipe_screen *screen = pipe->screen; 386 struct pipe_texture texTemp; 387 uint level; 388 389 memset(&texTemp, 0, sizeof(texTemp)); 390 texTemp.target = PIPE_TEXTURE_2D; 391 texTemp.format = PIPE_FORMAT_U_A8; /* XXX verify supported by driver! */ 392 texTemp.last_level = MAX_TEXTURE_LEVEL; 393 texTemp.width[0] = 1 << MAX_TEXTURE_LEVEL; 394 texTemp.height[0] = 1 << MAX_TEXTURE_LEVEL; 395 texTemp.depth[0] = 1; 396 texTemp.cpp = 1; 397 398 aaline->texture = screen->texture_create(screen, &texTemp); 399 400 /* Fill in mipmap images. 401 * Basically each level is solid opaque, except for the outermost 402 * texels which are zero. Special case the 1x1 and 2x2 levels. 403 */ 404 for (level = 0; level <= MAX_TEXTURE_LEVEL; level++) { 405 struct pipe_surface *surface; 406 const uint size = aaline->texture->width[level]; 407 ubyte *data; 408 uint i, j; 409 410 assert(aaline->texture->width[level] == aaline->texture->height[level]); 411 412 surface = screen->get_tex_surface(screen, aaline->texture, 0, level, 0); 413 data = pipe_surface_map(surface); 414 415 for (i = 0; i < size; i++) { 416 for (j = 0; j < size; j++) { 417 ubyte d; 418 if (size == 1) { 419 d = 255; 420 } 421 else if (size == 2) { 422 d = 200; /* tuneable */ 423 } 424 else if (i == 0 || j == 0 || i == size - 1 || j == size - 1) { 425 d = 0; 426 } 427 else { 428 d = 255; 429 } 430 data[i * surface->pitch + j] = d; 431 } 432 } 433 434 /* unmap */ 435 pipe_surface_unmap(surface); 436 pipe_surface_reference(&surface, NULL); 437 pipe->texture_update(pipe, aaline->texture, 0, (1 << level)); 438 } 439} 440 441 442/** 443 * Create the sampler CSO that'll be used for antialiasing. 444 * By using a mipmapped texture, we don't have to generate a different 445 * texture image for each line size. 446 */ 447static void 448aaline_create_sampler(struct aaline_stage *aaline) 449{ 450 struct pipe_sampler_state sampler; 451 struct pipe_context *pipe = aaline->pipe; 452 453 memset(&sampler, 0, sizeof(sampler)); 454 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 455 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 456 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; 457 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_LINEAR; 458 sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR; 459 sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR; 460 sampler.normalized_coords = 1; 461 sampler.min_lod = 0.0f; 462 sampler.max_lod = MAX_TEXTURE_LEVEL; 463 464 aaline->sampler_cso = pipe->create_sampler_state(pipe, &sampler); 465} 466 467 468/** 469 * When we're about to draw our first AA line in a batch, this function is 470 * called to tell the driver to bind our modified fragment shader. 471 */ 472static void 473bind_aaline_fragment_shader(struct aaline_stage *aaline) 474{ 475 if (!aaline->fs->aaline_fs) { 476 generate_aaline_fs(aaline); 477 } 478 aaline->driver_bind_fs_state(aaline->pipe, aaline->fs->aaline_fs); 479} 480 481 482 483static INLINE struct aaline_stage * 484aaline_stage( struct draw_stage *stage ) 485{ 486 return (struct aaline_stage *) stage; 487} 488 489 490static void 491passthrough_point(struct draw_stage *stage, struct prim_header *header) 492{ 493 stage->next->point(stage->next, header); 494} 495 496 497static void 498passthrough_tri(struct draw_stage *stage, struct prim_header *header) 499{ 500 stage->next->tri(stage->next, header); 501} 502 503 504/** 505 * Draw a wide line by drawing a quad, using geometry which will 506 * fullfill GL's antialiased line requirements. 507 */ 508static void 509aaline_line(struct draw_stage *stage, struct prim_header *header) 510{ 511 const struct aaline_stage *aaline = aaline_stage(stage); 512 const float half_width = aaline->half_line_width; 513 struct prim_header tri; 514 struct vertex_header *v[8]; 515 uint texPos = aaline->tex_slot; 516 float *pos, *tex; 517 float dx = header->v[1]->data[0][0] - header->v[0]->data[0][0]; 518 float dy = header->v[1]->data[0][1] - header->v[0]->data[0][1]; 519 double a = atan2(dy, dx); 520 float c_a = (float) cos(a), s_a = (float) sin(a); 521 uint i; 522 523 /* XXX the ends of lines aren't quite perfect yet, but probably passable */ 524 dx = 0.5F * half_width; 525 dy = half_width; 526 527 /* allocate/dup new verts */ 528 for (i = 0; i < 8; i++) { 529 v[i] = dup_vert(stage, header->v[i/4], i); 530 } 531 532 /* 533 * Quad strip for line from v0 to v1 (*=endpoints): 534 * 535 * 1 3 5 7 536 * +---+---------------------+---+ 537 * | | 538 * | *v0 v1* | 539 * | | 540 * +---+---------------------+---+ 541 * 0 2 4 6 542 */ 543 544 /* new verts */ 545 pos = v[0]->data[0]; 546 pos[0] += (-dx * c_a - dy * s_a); 547 pos[1] += (-dx * s_a + dy * c_a); 548 549 pos = v[1]->data[0]; 550 pos[0] += (-dx * c_a - -dy * s_a); 551 pos[1] += (-dx * s_a + -dy * c_a); 552 553 pos = v[2]->data[0]; 554 pos[0] += ( dx * c_a - dy * s_a); 555 pos[1] += ( dx * s_a + dy * c_a); 556 557 pos = v[3]->data[0]; 558 pos[0] += ( dx * c_a - -dy * s_a); 559 pos[1] += ( dx * s_a + -dy * c_a); 560 561 pos = v[4]->data[0]; 562 pos[0] += (-dx * c_a - dy * s_a); 563 pos[1] += (-dx * s_a + dy * c_a); 564 565 pos = v[5]->data[0]; 566 pos[0] += (-dx * c_a - -dy * s_a); 567 pos[1] += (-dx * s_a + -dy * c_a); 568 569 pos = v[6]->data[0]; 570 pos[0] += ( dx * c_a - dy * s_a); 571 pos[1] += ( dx * s_a + dy * c_a); 572 573 pos = v[7]->data[0]; 574 pos[0] += ( dx * c_a - -dy * s_a); 575 pos[1] += ( dx * s_a + -dy * c_a); 576 577 /* new texcoords */ 578 tex = v[0]->data[texPos]; 579 ASSIGN_4V(tex, 0, 0, 0, 1); 580 581 tex = v[1]->data[texPos]; 582 ASSIGN_4V(tex, 0, 1, 0, 1); 583 584 tex = v[2]->data[texPos]; 585 ASSIGN_4V(tex, .5, 0, 0, 1); 586 587 tex = v[3]->data[texPos]; 588 ASSIGN_4V(tex, .5, 1, 0, 1); 589 590 tex = v[4]->data[texPos]; 591 ASSIGN_4V(tex, .5, 0, 0, 1); 592 593 tex = v[5]->data[texPos]; 594 ASSIGN_4V(tex, .5, 1, 0, 1); 595 596 tex = v[6]->data[texPos]; 597 ASSIGN_4V(tex, 1, 0, 0, 1); 598 599 tex = v[7]->data[texPos]; 600 ASSIGN_4V(tex, 1, 1, 0, 1); 601 602 /* emit 6 tris for the quad strip */ 603 tri.v[0] = v[2]; tri.v[1] = v[1]; tri.v[2] = v[0]; 604 stage->next->tri( stage->next, &tri ); 605 606 tri.v[0] = v[3]; tri.v[1] = v[1]; tri.v[2] = v[2]; 607 stage->next->tri( stage->next, &tri ); 608 609 tri.v[0] = v[4]; tri.v[1] = v[3]; tri.v[2] = v[2]; 610 stage->next->tri( stage->next, &tri ); 611 612 tri.v[0] = v[5]; tri.v[1] = v[3]; tri.v[2] = v[4]; 613 stage->next->tri( stage->next, &tri ); 614 615 tri.v[0] = v[6]; tri.v[1] = v[5]; tri.v[2] = v[4]; 616 stage->next->tri( stage->next, &tri ); 617 618 tri.v[0] = v[7]; tri.v[1] = v[5]; tri.v[2] = v[6]; 619 stage->next->tri( stage->next, &tri ); 620} 621 622 623static void 624aaline_first_line(struct draw_stage *stage, struct prim_header *header) 625{ 626 auto struct aaline_stage *aaline = aaline_stage(stage); 627 struct draw_context *draw = stage->draw; 628 struct pipe_context *pipe = aaline->pipe; 629 uint num_samplers; 630 631 assert(draw->rasterizer->line_smooth); 632 633 if (draw->rasterizer->line_width <= 3.0) 634 aaline->half_line_width = 1.5f; 635 else 636 aaline->half_line_width = 0.5f * draw->rasterizer->line_width; 637 638 /* 639 * Bind (generate) our fragprog, sampler and texture 640 */ 641 bind_aaline_fragment_shader(aaline); 642 643 /* update vertex attrib info */ 644 aaline->tex_slot = draw->num_vs_outputs; 645 assert(aaline->tex_slot > 0); /* output[0] is vertex pos */ 646 647 /* advertise the extra post-transformed vertex attribute */ 648 draw->extra_vp_outputs.semantic_name = TGSI_SEMANTIC_GENERIC; 649 draw->extra_vp_outputs.semantic_index = aaline->fs->generic_attrib; 650 draw->extra_vp_outputs.slot = aaline->tex_slot; 651 652 /* how many samplers? */ 653 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ 654 num_samplers = MAX2(aaline->num_textures, aaline->num_samplers); 655 num_samplers = MAX2(num_samplers, aaline->fs->sampler_unit + 1); 656 657 aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso; 658 pipe_texture_reference(&aaline->state.texture[aaline->fs->sampler_unit], 659 aaline->texture); 660 661 aaline->driver_bind_sampler_states(pipe, num_samplers, aaline->state.sampler); 662 aaline->driver_set_sampler_textures(pipe, num_samplers, aaline->state.texture); 663 664 /* now really draw first line */ 665 stage->line = aaline_line; 666 stage->line(stage, header); 667} 668 669 670static void 671aaline_flush(struct draw_stage *stage, unsigned flags) 672{ 673 struct draw_context *draw = stage->draw; 674 struct aaline_stage *aaline = aaline_stage(stage); 675 struct pipe_context *pipe = aaline->pipe; 676 677 stage->line = aaline_first_line; 678 stage->next->flush( stage->next, flags ); 679 680 /* restore original frag shader */ 681 aaline->driver_bind_fs_state(pipe, aaline->fs->driver_fs); 682 683 /* XXX restore original texture, sampler state */ 684 aaline->driver_bind_sampler_states(pipe, aaline->num_samplers, 685 aaline->state.sampler); 686 aaline->driver_set_sampler_textures(pipe, aaline->num_textures, 687 aaline->state.texture); 688 689 draw->extra_vp_outputs.slot = 0; 690} 691 692 693static void 694aaline_reset_stipple_counter(struct draw_stage *stage) 695{ 696 stage->next->reset_stipple_counter( stage->next ); 697} 698 699 700static void 701aaline_destroy(struct draw_stage *stage) 702{ 703 struct aaline_stage *aaline = aaline_stage(stage); 704 705 aaline->pipe->delete_sampler_state(aaline->pipe, aaline->sampler_cso); 706 707 pipe_texture_release(&aaline->texture); 708 709 draw_free_temp_verts( stage ); 710 711 FREE( stage ); 712} 713 714 715static struct aaline_stage * 716draw_aaline_stage(struct draw_context *draw) 717{ 718 struct aaline_stage *aaline = CALLOC_STRUCT(aaline_stage); 719 720 draw_alloc_temp_verts( &aaline->stage, 8 ); 721 722 aaline->stage.draw = draw; 723 aaline->stage.next = NULL; 724 aaline->stage.point = passthrough_point; 725 aaline->stage.line = aaline_first_line; 726 aaline->stage.tri = passthrough_tri; 727 aaline->stage.flush = aaline_flush; 728 aaline->stage.reset_stipple_counter = aaline_reset_stipple_counter; 729 aaline->stage.destroy = aaline_destroy; 730 731 return aaline; 732} 733 734 735static struct aaline_stage * 736aaline_stage_from_pipe(struct pipe_context *pipe) 737{ 738 struct draw_context *draw = (struct draw_context *) pipe->draw; 739 return aaline_stage(draw->pipeline.aaline); 740} 741 742 743/** 744 * This function overrides the driver's create_fs_state() function and 745 * will typically be called by the state tracker. 746 */ 747static void * 748aaline_create_fs_state(struct pipe_context *pipe, 749 const struct pipe_shader_state *fs) 750{ 751 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 752 struct aaline_fragment_shader *aafs = CALLOC_STRUCT(aaline_fragment_shader); 753 754 if (aafs) { 755 aafs->state = *fs; 756 757 /* pass-through */ 758 aafs->driver_fs = aaline->driver_create_fs_state(aaline->pipe, fs); 759 } 760 761 return aafs; 762} 763 764 765static void 766aaline_bind_fs_state(struct pipe_context *pipe, void *fs) 767{ 768 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 769 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 770 /* save current */ 771 aaline->fs = aafs; 772 /* pass-through */ 773 aaline->driver_bind_fs_state(aaline->pipe, 774 (aafs ? aafs->driver_fs : NULL)); 775} 776 777 778static void 779aaline_delete_fs_state(struct pipe_context *pipe, void *fs) 780{ 781 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 782 struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; 783 /* pass-through */ 784 aaline->driver_delete_fs_state(aaline->pipe, aafs->driver_fs); 785 FREE(aafs); 786} 787 788 789static void 790aaline_bind_sampler_states(struct pipe_context *pipe, 791 unsigned num, void **sampler) 792{ 793 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 794 /* save current */ 795 memcpy(aaline->state.sampler, sampler, num * sizeof(void *)); 796 aaline->num_samplers = num; 797 /* pass-through */ 798 aaline->driver_bind_sampler_states(aaline->pipe, num, sampler); 799} 800 801 802static void 803aaline_set_sampler_textures(struct pipe_context *pipe, 804 unsigned num, struct pipe_texture **texture) 805{ 806 struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); 807 uint i; 808 809 /* save current */ 810 for (i = 0; i < num; i++) { 811 pipe_texture_reference(&aaline->state.texture[i], texture[i]); 812 } 813 aaline->num_textures = num; 814 815 /* pass-through */ 816 aaline->driver_set_sampler_textures(aaline->pipe, num, texture); 817} 818 819 820/** 821 * Called by drivers that want to install this AA line prim stage 822 * into the draw module's pipeline. This will not be used if the 823 * hardware has native support for AA lines. 824 */ 825void 826draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe) 827{ 828 struct aaline_stage *aaline; 829 830 pipe->draw = (void *) draw; 831 832 /* 833 * Create / install AA line drawing / prim stage 834 */ 835 aaline = draw_aaline_stage( draw ); 836 assert(aaline); 837 draw->pipeline.aaline = &aaline->stage; 838 839 aaline->pipe = pipe; 840 841 /* create special texture, sampler state */ 842 aaline_create_texture(aaline); 843 aaline_create_sampler(aaline); 844 845 /* save original driver functions */ 846 aaline->driver_create_fs_state = pipe->create_fs_state; 847 aaline->driver_bind_fs_state = pipe->bind_fs_state; 848 aaline->driver_delete_fs_state = pipe->delete_fs_state; 849 850 aaline->driver_bind_sampler_states = pipe->bind_sampler_states; 851 aaline->driver_set_sampler_textures = pipe->set_sampler_textures; 852 853 /* override the driver's functions */ 854 pipe->create_fs_state = aaline_create_fs_state; 855 pipe->bind_fs_state = aaline_bind_fs_state; 856 pipe->delete_fs_state = aaline_delete_fs_state; 857 858 pipe->bind_sampler_states = aaline_bind_sampler_states; 859 pipe->set_sampler_textures = aaline_set_sampler_textures; 860} 861