1/* 2 * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com> 3 * Copyright 2010 Marek Olšák <maraeo@gmail.com> 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * on the rights to use, copy, modify, merge, publish, distribute, sub 9 * license, and/or sell copies of the Software, and to permit persons to whom 10 * the Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 22 * USE OR OTHER DEALINGS IN THE SOFTWARE. */ 23 24/* r300_render: Vertex and index buffer primitive emission. Contains both 25 * HW TCL fastpath rendering, and SW TCL Draw-assisted rendering. */ 26 27#include "draw/draw_context.h" 28#include "draw/draw_vbuf.h" 29 30#include "util/u_inlines.h" 31 32#include "util/format/u_format.h" 33#include "util/u_draw.h" 34#include "util/u_memory.h" 35#include "util/u_upload_mgr.h" 36#include "util/u_prim.h" 37 38#include "r300_cs.h" 39#include "r300_context.h" 40#include "r300_screen_buffer.h" 41#include "r300_emit.h" 42#include "r300_reg.h" 43 44#include <limits.h> 45 46#define IMMD_DWORDS 32 47 48static uint32_t r300_translate_primitive(unsigned prim) 49{ 50 static const int prim_conv[] = { 51 R300_VAP_VF_CNTL__PRIM_POINTS, 52 R300_VAP_VF_CNTL__PRIM_LINES, 53 R300_VAP_VF_CNTL__PRIM_LINE_LOOP, 54 R300_VAP_VF_CNTL__PRIM_LINE_STRIP, 55 R300_VAP_VF_CNTL__PRIM_TRIANGLES, 56 R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP, 57 R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN, 58 R300_VAP_VF_CNTL__PRIM_QUADS, 59 R300_VAP_VF_CNTL__PRIM_QUAD_STRIP, 60 R300_VAP_VF_CNTL__PRIM_POLYGON, 61 -1, 62 -1, 63 -1, 64 -1 65 }; 66 unsigned hwprim = prim_conv[prim]; 67 68 assert(hwprim != -1); 69 return hwprim; 70} 71 72static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300, 73 unsigned mode) 74{ 75 struct r300_rs_state* rs = (struct r300_rs_state*)r300->rs_state.state; 76 uint32_t color_control = rs->color_control; 77 78 /* By default (see r300_state.c:r300_create_rs_state) color_control is 79 * initialized to provoking the first vertex. 80 * 81 * Triangle fans must be reduced to the second vertex, not the first, in 82 * Gallium flatshade-first mode, as per the GL spec. 83 * (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt) 84 * 85 * Quads never provoke correctly in flatshade-first mode. The first 86 * vertex is never considered as provoking, so only the second, third, 87 * and fourth vertices can be selected, and both "third" and "last" modes 88 * select the fourth vertex. This is probably due to D3D lacking quads. 89 * 90 * Similarly, polygons reduce to the first, not the last, vertex, when in 91 * "last" mode, and all other modes start from the second vertex. 92 * 93 * ~ C. 94 */ 95 96 if (rs->rs.flatshade_first) { 97 switch (mode) { 98 case PIPE_PRIM_TRIANGLE_FAN: 99 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND; 100 break; 101 case PIPE_PRIM_QUADS: 102 case PIPE_PRIM_QUAD_STRIP: 103 case PIPE_PRIM_POLYGON: 104 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST; 105 break; 106 default: 107 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST; 108 break; 109 } 110 } else { 111 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST; 112 } 113 114 return color_control; 115} 116 117void r500_emit_index_bias(struct r300_context *r300, int index_bias) 118{ 119 CS_LOCALS(r300); 120 121 BEGIN_CS(2); 122 OUT_CS_REG(R500_VAP_INDEX_OFFSET, 123 (index_bias & 0xFFFFFF) | (index_bias < 0 ? 1<<24 : 0)); 124 END_CS; 125} 126 127static void r300_emit_draw_init(struct r300_context *r300, unsigned mode, 128 unsigned max_index) 129{ 130 CS_LOCALS(r300); 131 132 assert(max_index < (1 << 24)); 133 134 BEGIN_CS(5); 135 OUT_CS_REG(R300_GA_COLOR_CONTROL, 136 r300_provoking_vertex_fixes(r300, mode)); 137 OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2); 138 OUT_CS(max_index); 139 OUT_CS(0); 140 END_CS; 141} 142 143/* This function splits the index bias value into two parts: 144 * - buffer_offset: the value that can be safely added to buffer offsets 145 * in r300_emit_vertex_arrays (it must yield a positive offset when added to 146 * a vertex buffer offset) 147 * - index_offset: the value that must be manually subtracted from indices 148 * in an index buffer to achieve negative offsets. */ 149static void r300_split_index_bias(struct r300_context *r300, int index_bias, 150 int *buffer_offset, int *index_offset) 151{ 152 struct pipe_vertex_buffer *vb, *vbufs = r300->vertex_buffer; 153 struct pipe_vertex_element *velem = r300->velems->velem; 154 unsigned i, size; 155 int max_neg_bias; 156 157 if (index_bias < 0) { 158 /* See how large index bias we may subtract. We must be careful 159 * here because negative buffer offsets are not allowed 160 * by the DRM API. */ 161 max_neg_bias = INT_MAX; 162 for (i = 0; i < r300->velems->count; i++) { 163 vb = &vbufs[velem[i].vertex_buffer_index]; 164 size = (vb->buffer_offset + velem[i].src_offset) / vb->stride; 165 max_neg_bias = MIN2(max_neg_bias, size); 166 } 167 168 /* Now set the minimum allowed value. */ 169 *buffer_offset = MAX2(-max_neg_bias, index_bias); 170 } else { 171 /* A positive index bias is OK. */ 172 *buffer_offset = index_bias; 173 } 174 175 *index_offset = index_bias - *buffer_offset; 176} 177 178enum r300_prepare_flags { 179 PREP_EMIT_STATES = (1 << 0), /* call emit_dirty_state and friends? */ 180 PREP_VALIDATE_VBOS = (1 << 1), /* validate VBOs? */ 181 PREP_EMIT_VARRAYS = (1 << 2), /* call emit_vertex_arrays? */ 182 PREP_EMIT_VARRAYS_SWTCL = (1 << 3), /* call emit_vertex_arrays_swtcl? */ 183 PREP_INDEXED = (1 << 4) /* is this draw_elements? */ 184}; 185 186/** 187 * Check if the requested number of dwords is available in the CS and 188 * if not, flush. 189 * \param r300 The context. 190 * \param flags See r300_prepare_flags. 191 * \param cs_dwords The number of dwords to reserve in CS. 192 * \return TRUE if the CS was flushed 193 */ 194static boolean r300_reserve_cs_dwords(struct r300_context *r300, 195 enum r300_prepare_flags flags, 196 unsigned cs_dwords) 197{ 198 boolean flushed = FALSE; 199 boolean emit_states = flags & PREP_EMIT_STATES; 200 boolean emit_vertex_arrays = flags & PREP_EMIT_VARRAYS; 201 boolean emit_vertex_arrays_swtcl = flags & PREP_EMIT_VARRAYS_SWTCL; 202 203 /* Add dirty state, index offset, and AOS. */ 204 if (emit_states) 205 cs_dwords += r300_get_num_dirty_dwords(r300); 206 207 if (r300->screen->caps.is_r500) 208 cs_dwords += 2; /* emit_index_offset */ 209 210 if (emit_vertex_arrays) 211 cs_dwords += 55; /* emit_vertex_arrays */ 212 213 if (emit_vertex_arrays_swtcl) 214 cs_dwords += 7; /* emit_vertex_arrays_swtcl */ 215 216 cs_dwords += r300_get_num_cs_end_dwords(r300); 217 218 /* Reserve requested CS space. */ 219 if (!r300->rws->cs_check_space(&r300->cs, cs_dwords, false)) { 220 r300_flush(&r300->context, PIPE_FLUSH_ASYNC, NULL); 221 flushed = TRUE; 222 } 223 224 return flushed; 225} 226 227/** 228 * Validate buffers and emit dirty state. 229 * \param r300 The context. 230 * \param flags See r300_prepare_flags. 231 * \param index_buffer The index buffer to validate. The parameter may be NULL. 232 * \param buffer_offset The offset passed to emit_vertex_arrays. 233 * \param index_bias The index bias to emit. 234 * \param instance_id Index of instance to render 235 * \return TRUE if rendering should be skipped 236 */ 237static boolean r300_emit_states(struct r300_context *r300, 238 enum r300_prepare_flags flags, 239 struct pipe_resource *index_buffer, 240 int buffer_offset, 241 int index_bias, int instance_id) 242{ 243 boolean emit_states = flags & PREP_EMIT_STATES; 244 boolean emit_vertex_arrays = flags & PREP_EMIT_VARRAYS; 245 boolean emit_vertex_arrays_swtcl = flags & PREP_EMIT_VARRAYS_SWTCL; 246 boolean indexed = flags & PREP_INDEXED; 247 boolean validate_vbos = flags & PREP_VALIDATE_VBOS; 248 249 /* Validate buffers and emit dirty state if needed. */ 250 if (emit_states || (emit_vertex_arrays && validate_vbos)) { 251 if (!r300_emit_buffer_validate(r300, validate_vbos, 252 index_buffer)) { 253 fprintf(stderr, "r300: CS space validation failed. " 254 "(not enough memory?) Skipping rendering.\n"); 255 return FALSE; 256 } 257 } 258 259 if (emit_states) 260 r300_emit_dirty_state(r300); 261 262 if (r300->screen->caps.is_r500) { 263 if (r300->screen->caps.has_tcl) 264 r500_emit_index_bias(r300, index_bias); 265 else 266 r500_emit_index_bias(r300, 0); 267 } 268 269 if (emit_vertex_arrays && 270 (r300->vertex_arrays_dirty || 271 r300->vertex_arrays_indexed != indexed || 272 r300->vertex_arrays_offset != buffer_offset || 273 r300->vertex_arrays_instance_id != instance_id)) { 274 r300_emit_vertex_arrays(r300, buffer_offset, indexed, instance_id); 275 276 r300->vertex_arrays_dirty = FALSE; 277 r300->vertex_arrays_indexed = indexed; 278 r300->vertex_arrays_offset = buffer_offset; 279 r300->vertex_arrays_instance_id = instance_id; 280 } 281 282 if (emit_vertex_arrays_swtcl) 283 r300_emit_vertex_arrays_swtcl(r300, indexed); 284 285 return TRUE; 286} 287 288/** 289 * Check if the requested number of dwords is available in the CS and 290 * if not, flush. Then validate buffers and emit dirty state. 291 * \param r300 The context. 292 * \param flags See r300_prepare_flags. 293 * \param index_buffer The index buffer to validate. The parameter may be NULL. 294 * \param cs_dwords The number of dwords to reserve in CS. 295 * \param buffer_offset The offset passed to emit_vertex_arrays. 296 * \param index_bias The index bias to emit. 297 * \param instance_id The instance to render. 298 * \return TRUE if rendering should be skipped 299 */ 300static boolean r300_prepare_for_rendering(struct r300_context *r300, 301 enum r300_prepare_flags flags, 302 struct pipe_resource *index_buffer, 303 unsigned cs_dwords, 304 int buffer_offset, 305 int index_bias, 306 int instance_id) 307{ 308 /* Make sure there is enough space in the command stream and emit states. */ 309 if (r300_reserve_cs_dwords(r300, flags, cs_dwords)) 310 flags |= PREP_EMIT_STATES; 311 312 return r300_emit_states(r300, flags, index_buffer, buffer_offset, 313 index_bias, instance_id); 314} 315 316static boolean immd_is_good_idea(struct r300_context *r300, 317 unsigned count) 318{ 319 if (DBG_ON(r300, DBG_NO_IMMD)) { 320 return FALSE; 321 } 322 323 if (count * r300->velems->vertex_size_dwords > IMMD_DWORDS) { 324 return FALSE; 325 } 326 327 /* Buffers can only be used for read by r300 (except query buffers, but 328 * those can't be bound by an gallium frontend as vertex buffers). */ 329 return TRUE; 330} 331 332/***************************************************************************** 333 * The HWTCL draw functions. * 334 ****************************************************************************/ 335 336static void r300_draw_arrays_immediate(struct r300_context *r300, 337 const struct pipe_draw_info *info, 338 const struct pipe_draw_start_count_bias *draw) 339{ 340 struct pipe_vertex_element* velem; 341 struct pipe_vertex_buffer* vbuf; 342 unsigned vertex_element_count = r300->velems->count; 343 unsigned i, v, vbi; 344 345 /* Size of the vertex, in dwords. */ 346 unsigned vertex_size = r300->velems->vertex_size_dwords; 347 348 /* The number of dwords for this draw operation. */ 349 unsigned dwords = 4 + draw->count * vertex_size; 350 351 /* Size of the vertex element, in dwords. */ 352 unsigned size[PIPE_MAX_ATTRIBS]; 353 354 /* Stride to the same attrib in the next vertex in the vertex buffer, 355 * in dwords. */ 356 unsigned stride[PIPE_MAX_ATTRIBS]; 357 358 /* Mapped vertex buffers. */ 359 uint32_t* map[PIPE_MAX_ATTRIBS] = {0}; 360 uint32_t* mapelem[PIPE_MAX_ATTRIBS]; 361 362 CS_LOCALS(r300); 363 364 if (!r300_prepare_for_rendering(r300, PREP_EMIT_STATES, NULL, dwords, 0, 0, -1)) 365 return; 366 367 /* Calculate the vertex size, offsets, strides etc. and map the buffers. */ 368 for (i = 0; i < vertex_element_count; i++) { 369 velem = &r300->velems->velem[i]; 370 size[i] = r300->velems->format_size[i] / 4; 371 vbi = velem->vertex_buffer_index; 372 vbuf = &r300->vertex_buffer[vbi]; 373 stride[i] = vbuf->stride / 4; 374 375 /* Map the buffer. */ 376 if (!map[vbi]) { 377 map[vbi] = (uint32_t*)r300->rws->buffer_map(r300->rws, 378 r300_resource(vbuf->buffer.resource)->buf, 379 &r300->cs, PIPE_MAP_READ | PIPE_MAP_UNSYNCHRONIZED); 380 map[vbi] += (vbuf->buffer_offset / 4) + stride[i] * draw->start; 381 } 382 mapelem[i] = map[vbi] + (velem->src_offset / 4); 383 } 384 385 r300_emit_draw_init(r300, info->mode, draw->count-1); 386 387 BEGIN_CS(dwords); 388 OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size); 389 OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, draw->count * vertex_size); 390 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (draw->count << 16) | 391 r300_translate_primitive(info->mode)); 392 393 /* Emit vertices. */ 394 for (v = 0; v < draw->count; v++) { 395 for (i = 0; i < vertex_element_count; i++) { 396 OUT_CS_TABLE(&mapelem[i][stride[i] * v], size[i]); 397 } 398 } 399 END_CS; 400} 401 402static void r300_emit_draw_arrays(struct r300_context *r300, 403 unsigned mode, 404 unsigned count) 405{ 406 boolean alt_num_verts = count > 65535; 407 CS_LOCALS(r300); 408 409 if (count >= (1 << 24)) { 410 fprintf(stderr, "r300: Got a huge number of vertices: %i, " 411 "refusing to render.\n", count); 412 return; 413 } 414 415 r300_emit_draw_init(r300, mode, count-1); 416 417 BEGIN_CS(2 + (alt_num_verts ? 2 : 0)); 418 if (alt_num_verts) { 419 OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count); 420 } 421 OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0); 422 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) | 423 r300_translate_primitive(mode) | 424 (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0)); 425 END_CS; 426} 427 428static void r300_emit_draw_elements(struct r300_context *r300, 429 struct pipe_resource* indexBuffer, 430 unsigned indexSize, 431 unsigned max_index, 432 unsigned mode, 433 unsigned start, 434 unsigned count, 435 uint16_t *imm_indices3) 436{ 437 uint32_t count_dwords, offset_dwords; 438 boolean alt_num_verts = count > 65535; 439 CS_LOCALS(r300); 440 441 if (count >= (1 << 24)) { 442 fprintf(stderr, "r300: Got a huge number of vertices: %i, " 443 "refusing to render (max_index: %i).\n", count, max_index); 444 return; 445 } 446 447 DBG(r300, DBG_DRAW, "r300: Indexbuf of %u indices, max %u\n", 448 count, max_index); 449 450 r300_emit_draw_init(r300, mode, max_index); 451 452 /* If start is odd, render the first triangle with indices embedded 453 * in the command stream. This will increase start by 3 and make it 454 * even. We can then proceed without a fallback. */ 455 if (indexSize == 2 && (start & 1) && 456 mode == PIPE_PRIM_TRIANGLES) { 457 BEGIN_CS(4); 458 OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 2); 459 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (3 << 16) | 460 R300_VAP_VF_CNTL__PRIM_TRIANGLES); 461 OUT_CS(imm_indices3[1] << 16 | imm_indices3[0]); 462 OUT_CS(imm_indices3[2]); 463 END_CS; 464 465 start += 3; 466 count -= 3; 467 if (!count) 468 return; 469 } 470 471 offset_dwords = indexSize * start / sizeof(uint32_t); 472 473 BEGIN_CS(8 + (alt_num_verts ? 2 : 0)); 474 if (alt_num_verts) { 475 OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count); 476 } 477 OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0); 478 if (indexSize == 4) { 479 count_dwords = count; 480 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) | 481 R300_VAP_VF_CNTL__INDEX_SIZE_32bit | 482 r300_translate_primitive(mode) | 483 (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0)); 484 } else { 485 count_dwords = (count + 1) / 2; 486 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) | 487 r300_translate_primitive(mode) | 488 (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0)); 489 } 490 491 OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2); 492 OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) | 493 (0 << R300_INDX_BUFFER_SKIP_SHIFT)); 494 OUT_CS(offset_dwords << 2); 495 OUT_CS(count_dwords); 496 OUT_CS_RELOC(r300_resource(indexBuffer)); 497 END_CS; 498} 499 500static void r300_draw_elements_immediate(struct r300_context *r300, 501 const struct pipe_draw_info *info, 502 const struct pipe_draw_start_count_bias *draw) 503{ 504 const uint8_t *ptr1; 505 const uint16_t *ptr2; 506 const uint32_t *ptr4; 507 unsigned index_size = info->index_size; 508 unsigned i, count_dwords = index_size == 4 ? draw->count : 509 (draw->count + 1) / 2; 510 CS_LOCALS(r300); 511 512 /* 19 dwords for r300_draw_elements_immediate. Give up if the function fails. */ 513 if (!r300_prepare_for_rendering(r300, 514 PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS | 515 PREP_INDEXED, NULL, 2+count_dwords, 0, draw->index_bias, -1)) 516 return; 517 518 r300_emit_draw_init(r300, info->mode, info->max_index); 519 520 BEGIN_CS(2 + count_dwords); 521 OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, count_dwords); 522 523 switch (index_size) { 524 case 1: 525 ptr1 = (uint8_t*)info->index.user; 526 ptr1 += draw->start; 527 528 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (draw->count << 16) | 529 r300_translate_primitive(info->mode)); 530 531 if (draw->index_bias && !r300->screen->caps.is_r500) { 532 for (i = 0; i < draw->count-1; i += 2) 533 OUT_CS(((ptr1[i+1] + draw->index_bias) << 16) | 534 (ptr1[i] + draw->index_bias)); 535 536 if (draw->count & 1) 537 OUT_CS(ptr1[i] + draw->index_bias); 538 } else { 539 for (i = 0; i < draw->count-1; i += 2) 540 OUT_CS(((ptr1[i+1]) << 16) | 541 (ptr1[i] )); 542 543 if (draw->count & 1) 544 OUT_CS(ptr1[i]); 545 } 546 break; 547 548 case 2: 549 ptr2 = (uint16_t*)info->index.user; 550 ptr2 += draw->start; 551 552 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (draw->count << 16) | 553 r300_translate_primitive(info->mode)); 554 555 if (draw->index_bias && !r300->screen->caps.is_r500) { 556 for (i = 0; i < draw->count-1; i += 2) 557 OUT_CS(((ptr2[i+1] + draw->index_bias) << 16) | 558 (ptr2[i] + draw->index_bias)); 559 560 if (draw->count & 1) 561 OUT_CS(ptr2[i] + draw->index_bias); 562 } else { 563 OUT_CS_TABLE(ptr2, count_dwords); 564 } 565 break; 566 567 case 4: 568 ptr4 = (uint32_t*)info->index.user; 569 ptr4 += draw->start; 570 571 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (draw->count << 16) | 572 R300_VAP_VF_CNTL__INDEX_SIZE_32bit | 573 r300_translate_primitive(info->mode)); 574 575 if (draw->index_bias && !r300->screen->caps.is_r500) { 576 for (i = 0; i < draw->count; i++) 577 OUT_CS(ptr4[i] + draw->index_bias); 578 } else { 579 OUT_CS_TABLE(ptr4, count_dwords); 580 } 581 break; 582 } 583 END_CS; 584} 585 586static void r300_draw_elements(struct r300_context *r300, 587 const struct pipe_draw_info *info, 588 const struct pipe_draw_start_count_bias *draw, 589 int instance_id) 590{ 591 struct pipe_resource *indexBuffer = 592 info->has_user_indices ? NULL : info->index.resource; 593 unsigned indexSize = info->index_size; 594 struct pipe_resource* orgIndexBuffer = indexBuffer; 595 unsigned start = draw->start; 596 unsigned count = draw->count; 597 boolean alt_num_verts = r300->screen->caps.is_r500 && 598 count > 65536; 599 unsigned short_count; 600 int buffer_offset = 0, index_offset = 0; /* for index bias emulation */ 601 uint16_t indices3[3]; 602 603 if (draw->index_bias && !r300->screen->caps.is_r500) { 604 r300_split_index_bias(r300, draw->index_bias, &buffer_offset, 605 &index_offset); 606 } 607 608 r300_translate_index_buffer(r300, info, &indexBuffer, 609 &indexSize, index_offset, &start, count); 610 611 /* Fallback for misaligned ushort indices. */ 612 if (indexSize == 2 && (start & 1) && indexBuffer) { 613 /* If we got here, then orgIndexBuffer == indexBuffer. */ 614 uint16_t *ptr = r300->rws->buffer_map(r300->rws, r300_resource(orgIndexBuffer)->buf, 615 &r300->cs, 616 PIPE_MAP_READ | 617 PIPE_MAP_UNSYNCHRONIZED); 618 619 if (info->mode == PIPE_PRIM_TRIANGLES) { 620 memcpy(indices3, ptr + start, 6); 621 } else { 622 /* Copy the mapped index buffer directly to the upload buffer. 623 * The start index will be aligned simply from the fact that 624 * every sub-buffer in the upload buffer is aligned. */ 625 r300_upload_index_buffer(r300, &indexBuffer, indexSize, &start, 626 count, (uint8_t*)ptr); 627 } 628 } else { 629 if (info->has_user_indices) 630 r300_upload_index_buffer(r300, &indexBuffer, indexSize, 631 &start, count, 632 info->index.user); 633 } 634 635 /* 19 dwords for emit_draw_elements. Give up if the function fails. */ 636 if (!r300_prepare_for_rendering(r300, 637 PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS | 638 PREP_INDEXED, indexBuffer, 19, buffer_offset, draw->index_bias, 639 instance_id)) 640 goto done; 641 642 if (alt_num_verts || count <= 65535) { 643 r300_emit_draw_elements(r300, indexBuffer, indexSize, 644 info->max_index, info->mode, start, count, 645 indices3); 646 } else { 647 do { 648 /* The maximum must be divisible by 4 and 3, 649 * so that quad and triangle lists are split correctly. 650 * 651 * Strips, loops, and fans won't work. */ 652 short_count = MIN2(count, 65532); 653 654 r300_emit_draw_elements(r300, indexBuffer, indexSize, 655 info->max_index, 656 info->mode, start, short_count, indices3); 657 658 start += short_count; 659 count -= short_count; 660 661 /* 15 dwords for emit_draw_elements */ 662 if (count) { 663 if (!r300_prepare_for_rendering(r300, 664 PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS | PREP_INDEXED, 665 indexBuffer, 19, buffer_offset, draw->index_bias, 666 instance_id)) 667 goto done; 668 } 669 } while (count); 670 } 671 672done: 673 if (indexBuffer != orgIndexBuffer) { 674 pipe_resource_reference( &indexBuffer, NULL ); 675 } 676} 677 678static void r300_draw_arrays(struct r300_context *r300, 679 const struct pipe_draw_info *info, 680 const struct pipe_draw_start_count_bias *draw, 681 int instance_id) 682{ 683 boolean alt_num_verts = r300->screen->caps.is_r500 && 684 draw->count > 65536; 685 unsigned start = draw->start; 686 unsigned count = draw->count; 687 unsigned short_count; 688 689 /* 9 spare dwords for emit_draw_arrays. Give up if the function fails. */ 690 if (!r300_prepare_for_rendering(r300, 691 PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS, 692 NULL, 9, start, 0, instance_id)) 693 return; 694 695 if (alt_num_verts || count <= 65535) { 696 r300_emit_draw_arrays(r300, info->mode, count); 697 } else { 698 do { 699 /* The maximum must be divisible by 4 and 3, 700 * so that quad and triangle lists are split correctly. 701 * 702 * Strips, loops, and fans won't work. */ 703 short_count = MIN2(count, 65532); 704 r300_emit_draw_arrays(r300, info->mode, short_count); 705 706 start += short_count; 707 count -= short_count; 708 709 /* 9 spare dwords for emit_draw_arrays. Give up if the function fails. */ 710 if (count) { 711 if (!r300_prepare_for_rendering(r300, 712 PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS, NULL, 9, 713 start, 0, instance_id)) 714 return; 715 } 716 } while (count); 717 } 718} 719 720static void r300_draw_arrays_instanced(struct r300_context *r300, 721 const struct pipe_draw_info *info, 722 const struct pipe_draw_start_count_bias *draw) 723{ 724 int i; 725 726 for (i = 0; i < info->instance_count; i++) 727 r300_draw_arrays(r300, info, draw, i); 728} 729 730static void r300_draw_elements_instanced(struct r300_context *r300, 731 const struct pipe_draw_info *info, 732 const struct pipe_draw_start_count_bias *draw) 733{ 734 int i; 735 736 for (i = 0; i < info->instance_count; i++) 737 r300_draw_elements(r300, info, draw, i); 738} 739 740static unsigned r300_max_vertex_count(struct r300_context *r300) 741{ 742 unsigned i, nr = r300->velems->count; 743 struct pipe_vertex_element *velems = r300->velems->velem; 744 unsigned result = ~0; 745 746 for (i = 0; i < nr; i++) { 747 struct pipe_vertex_buffer *vb = 748 &r300->vertex_buffer[velems[i].vertex_buffer_index]; 749 unsigned size, max_count, value; 750 751 /* We're not interested in constant and per-instance attribs. */ 752 if (!vb->buffer.resource || 753 !vb->stride || 754 velems[i].instance_divisor) { 755 continue; 756 } 757 758 size = vb->buffer.resource->width0; 759 760 /* Subtract buffer_offset. */ 761 value = vb->buffer_offset; 762 if (value >= size) { 763 return 0; 764 } 765 size -= value; 766 767 /* Subtract src_offset. */ 768 value = velems[i].src_offset; 769 if (value >= size) { 770 return 0; 771 } 772 size -= value; 773 774 /* Subtract format_size. */ 775 value = r300->velems->format_size[i]; 776 if (value >= size) { 777 return 0; 778 } 779 size -= value; 780 781 /* Compute the max count. */ 782 max_count = 1 + size / vb->stride; 783 result = MIN2(result, max_count); 784 } 785 return result; 786} 787 788 789static void r300_draw_vbo(struct pipe_context* pipe, 790 const struct pipe_draw_info *dinfo, 791 unsigned drawid_offset, 792 const struct pipe_draw_indirect_info *indirect, 793 const struct pipe_draw_start_count_bias *draws, 794 unsigned num_draws) 795{ 796 if (num_draws > 1) { 797 util_draw_multi(pipe, dinfo, drawid_offset, indirect, draws, num_draws); 798 return; 799 } 800 801 struct r300_context* r300 = r300_context(pipe); 802 struct pipe_draw_info info = *dinfo; 803 struct pipe_draw_start_count_bias draw = draws[0]; 804 805 if (r300->skip_rendering || 806 !u_trim_pipe_prim(info.mode, &draw.count)) { 807 return; 808 } 809 810 r300_update_derived_state(r300); 811 812 /* Draw. */ 813 if (info.index_size) { 814 unsigned max_count = r300_max_vertex_count(r300); 815 816 if (!max_count) { 817 fprintf(stderr, "r300: Skipping a draw command. There is a buffer " 818 " which is too small to be used for rendering.\n"); 819 return; 820 } 821 822 if (max_count == ~0) { 823 /* There are no per-vertex vertex elements. Use the hardware maximum. */ 824 max_count = 0xffffff; 825 } 826 827 info.max_index = max_count - 1; 828 829 if (info.instance_count <= 1) { 830 if (draw.count <= 8 && info.has_user_indices) { 831 r300_draw_elements_immediate(r300, &info, &draw); 832 } else { 833 r300_draw_elements(r300, &info, &draw, -1); 834 } 835 } else { 836 r300_draw_elements_instanced(r300, &info, &draw); 837 } 838 } else { 839 if (info.instance_count <= 1) { 840 if (immd_is_good_idea(r300, draw.count)) { 841 r300_draw_arrays_immediate(r300, &info, &draw); 842 } else { 843 r300_draw_arrays(r300, &info, &draw, -1); 844 } 845 } else { 846 r300_draw_arrays_instanced(r300, &info, &draw); 847 } 848 } 849} 850 851/**************************************************************************** 852 * The rest of this file is for SW TCL rendering only. Please be polite and * 853 * keep these functions separated so that they are easier to locate. ~C. * 854 ***************************************************************************/ 855 856/* SW TCL elements, using Draw. */ 857static void r300_swtcl_draw_vbo(struct pipe_context* pipe, 858 const struct pipe_draw_info *info, 859 unsigned drawid_offset, 860 const struct pipe_draw_indirect_info *indirect, 861 const struct pipe_draw_start_count_bias *draws, 862 unsigned num_draws) 863{ 864 if (num_draws > 1) { 865 util_draw_multi(pipe, info, drawid_offset, indirect, draws, num_draws); 866 return; 867 } 868 869 struct r300_context* r300 = r300_context(pipe); 870 struct pipe_draw_start_count_bias draw = draws[0]; 871 872 if (r300->skip_rendering) { 873 return; 874 } 875 876 if (!u_trim_pipe_prim(info->mode, &draw.count)) 877 return; 878 879 if (info->index_size) { 880 draw_set_indexes(r300->draw, 881 info->has_user_indices ? 882 info->index.user : 883 r300_resource(info->index.resource)->malloced_buffer, 884 info->index_size, ~0); 885 } 886 887 r300_update_derived_state(r300); 888 889 draw_vbo(r300->draw, info, drawid_offset, NULL, &draw, 1, 0); 890 draw_flush(r300->draw); 891} 892 893/* Object for rendering using Draw. */ 894struct r300_render { 895 /* Parent class */ 896 struct vbuf_render base; 897 898 /* Pipe context */ 899 struct r300_context* r300; 900 901 /* Vertex information */ 902 size_t vertex_size; 903 unsigned prim; 904 unsigned hwprim; 905 906 /* VBO */ 907 size_t vbo_max_used; 908 uint8_t *vbo_ptr; 909}; 910 911static inline struct r300_render* 912r300_render(struct vbuf_render* render) 913{ 914 return (struct r300_render*)render; 915} 916 917static const struct vertex_info* 918r300_render_get_vertex_info(struct vbuf_render* render) 919{ 920 struct r300_render* r300render = r300_render(render); 921 struct r300_context* r300 = r300render->r300; 922 923 return &r300->vertex_info; 924} 925 926static boolean r300_render_allocate_vertices(struct vbuf_render* render, 927 ushort vertex_size, 928 ushort count) 929{ 930 struct r300_render* r300render = r300_render(render); 931 struct r300_context* r300 = r300render->r300; 932 struct radeon_winsys *rws = r300->rws; 933 size_t size = (size_t)vertex_size * (size_t)count; 934 935 DBG(r300, DBG_DRAW, "r300: render_allocate_vertices (size: %d)\n", size); 936 937 if (!r300->vbo || size + r300->draw_vbo_offset > r300->vbo->size) { 938 pb_reference(&r300->vbo, NULL); 939 r300->vbo = NULL; 940 r300render->vbo_ptr = NULL; 941 942 r300->vbo = rws->buffer_create(rws, 943 MAX2(R300_MAX_DRAW_VBO_SIZE, size), 944 R300_BUFFER_ALIGNMENT, 945 RADEON_DOMAIN_GTT, 946 RADEON_FLAG_NO_INTERPROCESS_SHARING); 947 if (!r300->vbo) { 948 return FALSE; 949 } 950 r300->draw_vbo_offset = 0; 951 r300render->vbo_ptr = rws->buffer_map(rws, r300->vbo, &r300->cs, 952 PIPE_MAP_WRITE); 953 } 954 955 r300render->vertex_size = vertex_size; 956 return TRUE; 957} 958 959static void* r300_render_map_vertices(struct vbuf_render* render) 960{ 961 struct r300_render* r300render = r300_render(render); 962 struct r300_context* r300 = r300render->r300; 963 964 DBG(r300, DBG_DRAW, "r300: render_map_vertices\n"); 965 966 assert(r300render->vbo_ptr); 967 return r300render->vbo_ptr + r300->draw_vbo_offset; 968} 969 970static void r300_render_unmap_vertices(struct vbuf_render* render, 971 ushort min, 972 ushort max) 973{ 974 struct r300_render* r300render = r300_render(render); 975 struct r300_context* r300 = r300render->r300; 976 977 DBG(r300, DBG_DRAW, "r300: render_unmap_vertices\n"); 978 979 r300render->vbo_max_used = MAX2(r300render->vbo_max_used, 980 r300render->vertex_size * (max + 1)); 981} 982 983static void r300_render_release_vertices(struct vbuf_render* render) 984{ 985 struct r300_render* r300render = r300_render(render); 986 struct r300_context* r300 = r300render->r300; 987 988 DBG(r300, DBG_DRAW, "r300: render_release_vertices\n"); 989 990 r300->draw_vbo_offset += r300render->vbo_max_used; 991 r300render->vbo_max_used = 0; 992} 993 994static void r300_render_set_primitive(struct vbuf_render* render, 995 enum pipe_prim_type prim) 996{ 997 struct r300_render* r300render = r300_render(render); 998 999 r300render->prim = prim; 1000 r300render->hwprim = r300_translate_primitive(prim); 1001} 1002 1003static void r300_render_draw_arrays(struct vbuf_render* render, 1004 unsigned start, 1005 unsigned count) 1006{ 1007 struct r300_render* r300render = r300_render(render); 1008 struct r300_context* r300 = r300render->r300; 1009 uint8_t* ptr; 1010 unsigned i; 1011 unsigned dwords = 6; 1012 1013 CS_LOCALS(r300); 1014 (void) i; (void) ptr; 1015 1016 assert(start == 0); 1017 assert(count < (1 << 16)); 1018 1019 DBG(r300, DBG_DRAW, "r300: render_draw_arrays (count: %d)\n", count); 1020 1021 if (!r300_prepare_for_rendering(r300, 1022 PREP_EMIT_STATES | PREP_EMIT_VARRAYS_SWTCL, 1023 NULL, dwords, 0, 0, -1)) { 1024 return; 1025 } 1026 1027 BEGIN_CS(dwords); 1028 OUT_CS_REG(R300_GA_COLOR_CONTROL, 1029 r300_provoking_vertex_fixes(r300, r300render->prim)); 1030 OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1); 1031 OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0); 1032 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) | 1033 r300render->hwprim); 1034 END_CS; 1035} 1036 1037static void r300_render_draw_elements(struct vbuf_render* render, 1038 const ushort* indices, 1039 uint count) 1040{ 1041 struct r300_render* r300render = r300_render(render); 1042 struct r300_context* r300 = r300render->r300; 1043 unsigned max_index = (r300->vbo->size - r300->draw_vbo_offset) / 1044 (r300render->r300->vertex_info.size * 4) - 1; 1045 struct pipe_resource *index_buffer = NULL; 1046 unsigned index_buffer_offset; 1047 1048 CS_LOCALS(r300); 1049 DBG(r300, DBG_DRAW, "r300: render_draw_elements (count: %d)\n", count); 1050 1051 u_upload_data(r300->uploader, 0, count * 2, 4, indices, 1052 &index_buffer_offset, &index_buffer); 1053 if (!index_buffer) { 1054 return; 1055 } 1056 1057 if (!r300_prepare_for_rendering(r300, 1058 PREP_EMIT_STATES | 1059 PREP_EMIT_VARRAYS_SWTCL | PREP_INDEXED, 1060 index_buffer, 12, 0, 0, -1)) { 1061 pipe_resource_reference(&index_buffer, NULL); 1062 return; 1063 } 1064 1065 BEGIN_CS(12); 1066 OUT_CS_REG(R300_GA_COLOR_CONTROL, 1067 r300_provoking_vertex_fixes(r300, r300render->prim)); 1068 OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max_index); 1069 1070 OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0); 1071 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) | 1072 r300render->hwprim); 1073 1074 OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2); 1075 OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2)); 1076 OUT_CS(index_buffer_offset); 1077 OUT_CS((count + 1) / 2); 1078 OUT_CS_RELOC(r300_resource(index_buffer)); 1079 END_CS; 1080 1081 pipe_resource_reference(&index_buffer, NULL); 1082} 1083 1084static void r300_render_destroy(struct vbuf_render* render) 1085{ 1086 FREE(render); 1087} 1088 1089static struct vbuf_render* r300_render_create(struct r300_context* r300) 1090{ 1091 struct r300_render* r300render = CALLOC_STRUCT(r300_render); 1092 1093 r300render->r300 = r300; 1094 1095 r300render->base.max_vertex_buffer_bytes = R300_MAX_DRAW_VBO_SIZE; 1096 r300render->base.max_indices = 16 * 1024; 1097 1098 r300render->base.get_vertex_info = r300_render_get_vertex_info; 1099 r300render->base.allocate_vertices = r300_render_allocate_vertices; 1100 r300render->base.map_vertices = r300_render_map_vertices; 1101 r300render->base.unmap_vertices = r300_render_unmap_vertices; 1102 r300render->base.set_primitive = r300_render_set_primitive; 1103 r300render->base.draw_elements = r300_render_draw_elements; 1104 r300render->base.draw_arrays = r300_render_draw_arrays; 1105 r300render->base.release_vertices = r300_render_release_vertices; 1106 r300render->base.destroy = r300_render_destroy; 1107 1108 return &r300render->base; 1109} 1110 1111struct draw_stage* r300_draw_stage(struct r300_context* r300) 1112{ 1113 struct vbuf_render* render; 1114 struct draw_stage* stage; 1115 1116 render = r300_render_create(r300); 1117 1118 if (!render) { 1119 return NULL; 1120 } 1121 1122 stage = draw_vbuf_stage(r300->draw, render); 1123 1124 if (!stage) { 1125 render->destroy(render); 1126 return NULL; 1127 } 1128 1129 draw_set_render(r300->draw, render); 1130 1131 return stage; 1132} 1133 1134/**************************************************************************** 1135 * End of SW TCL functions * 1136 ***************************************************************************/ 1137 1138/* This functions is used to draw a rectangle for the blitter module. 1139 * 1140 * If we rendered a quad, the pixels on the main diagonal 1141 * would be computed and stored twice, which makes the clear/copy codepaths 1142 * somewhat inefficient. Instead we use a rectangular point sprite. */ 1143void r300_blitter_draw_rectangle(struct blitter_context *blitter, 1144 void *vertex_elements_cso, 1145 blitter_get_vs_func get_vs, 1146 int x1, int y1, int x2, int y2, 1147 float depth, unsigned num_instances, 1148 enum blitter_attrib_type type, 1149 const union blitter_attrib *attrib) 1150{ 1151 struct r300_context *r300 = r300_context(util_blitter_get_pipe(blitter)); 1152 unsigned last_sprite_coord_enable = r300->sprite_coord_enable; 1153 unsigned width = x2 - x1; 1154 unsigned height = y2 - y1; 1155 unsigned vertex_size = 1156 type == UTIL_BLITTER_ATTRIB_COLOR || !r300->draw ? 8 : 4; 1157 unsigned dwords = 13 + vertex_size + 1158 (type == UTIL_BLITTER_ATTRIB_TEXCOORD_XY ? 7 : 0); 1159 static const union blitter_attrib zeros; 1160 CS_LOCALS(r300); 1161 1162 /* XXX workaround for a lockup in MSAA resolve on SWTCL chipsets, this 1163 * function most probably doesn't handle type=NONE correctly */ 1164 if ((!r300->screen->caps.has_tcl && type == UTIL_BLITTER_ATTRIB_NONE) || 1165 type == UTIL_BLITTER_ATTRIB_TEXCOORD_XYZW || 1166 num_instances > 1) { 1167 util_blitter_draw_rectangle(blitter, vertex_elements_cso, get_vs, 1168 x1, y1, x2, y2, 1169 depth, num_instances, type, attrib); 1170 return; 1171 } 1172 1173 if (r300->skip_rendering) 1174 return; 1175 1176 r300->context.bind_vertex_elements_state(&r300->context, vertex_elements_cso); 1177 r300->context.bind_vs_state(&r300->context, get_vs(blitter)); 1178 1179 if (type == UTIL_BLITTER_ATTRIB_TEXCOORD_XY) 1180 r300->sprite_coord_enable = 1; 1181 1182 r300_update_derived_state(r300); 1183 1184 /* Mark some states we don't care about as non-dirty. */ 1185 r300->viewport_state.dirty = FALSE; 1186 1187 if (!r300_prepare_for_rendering(r300, PREP_EMIT_STATES, NULL, dwords, 0, 0, -1)) 1188 goto done; 1189 1190 DBG(r300, DBG_DRAW, "r300: draw_rectangle\n"); 1191 1192 BEGIN_CS(dwords); 1193 /* Set up GA. */ 1194 OUT_CS_REG(R300_GA_POINT_SIZE, (height * 6) | ((width * 6) << 16)); 1195 1196 if (type == UTIL_BLITTER_ATTRIB_TEXCOORD_XY) { 1197 /* Set up the GA to generate texcoords. */ 1198 OUT_CS_REG(R300_GB_ENABLE, R300_GB_POINT_STUFF_ENABLE | 1199 (R300_GB_TEX_STR << R300_GB_TEX0_SOURCE_SHIFT)); 1200 OUT_CS_REG_SEQ(R300_GA_POINT_S0, 4); 1201 OUT_CS_32F(attrib->texcoord.x1); 1202 OUT_CS_32F(attrib->texcoord.y2); 1203 OUT_CS_32F(attrib->texcoord.x2); 1204 OUT_CS_32F(attrib->texcoord.y1); 1205 } 1206 1207 /* Set up VAP controls. */ 1208 OUT_CS_REG(R300_VAP_CLIP_CNTL, R300_CLIP_DISABLE); 1209 OUT_CS_REG(R300_VAP_VTE_CNTL, R300_VTX_XY_FMT | R300_VTX_Z_FMT); 1210 OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size); 1211 OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2); 1212 OUT_CS(1); 1213 OUT_CS(0); 1214 1215 /* Draw. */ 1216 OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, vertex_size); 1217 OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (1 << 16) | 1218 R300_VAP_VF_CNTL__PRIM_POINTS); 1219 1220 OUT_CS_32F(x1 + width * 0.5f); 1221 OUT_CS_32F(y1 + height * 0.5f); 1222 OUT_CS_32F(depth); 1223 OUT_CS_32F(1); 1224 1225 if (vertex_size == 8) { 1226 if (!attrib) 1227 attrib = &zeros; 1228 OUT_CS_TABLE(attrib->color, 4); 1229 } 1230 END_CS; 1231 1232done: 1233 /* Restore the state. */ 1234 r300_mark_atom_dirty(r300, &r300->rs_state); 1235 r300_mark_atom_dirty(r300, &r300->viewport_state); 1236 1237 r300->sprite_coord_enable = last_sprite_coord_enable; 1238} 1239 1240void r300_init_render_functions(struct r300_context *r300) 1241{ 1242 /* Set draw functions based on presence of HW TCL. */ 1243 if (r300->screen->caps.has_tcl) { 1244 r300->context.draw_vbo = r300_draw_vbo; 1245 } else { 1246 r300->context.draw_vbo = r300_swtcl_draw_vbo; 1247 } 1248 1249 /* Plug in the two-sided stencil reference value fallback if needed. */ 1250 if (!r300->screen->caps.is_r500) 1251 r300_plug_in_stencil_ref_fallback(r300); 1252} 1253