src/gallium/drivers/r300/r300_render.c

   1 /*
   2  * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 /* r300_render: Vertex and index buffer primitive emission. Contains both
  24  * HW TCL fastpath rendering, and SW TCL Draw-assisted rendering. */
  25
  26 #include "draw/draw_context.h"
  27 #include "draw/draw_vbuf.h"
  28
  29 #include "indices/u_indices.h"
  30
  31 #include "pipe/p_inlines.h"
  32
  33 #include "util/u_memory.h"
  34 #include "util/u_prim.h"
  35
  36 #include "r300_cs.h"
  37 #include "r300_context.h"
  38 #include "r300_emit.h"
  39 #include "r300_reg.h"
  40 #include "r300_render.h"
  41 #include "r300_state_derived.h"
  42
  43 /* r300_render: Vertex and index buffer primitive emission. */
  44 #define R300_MAX_VBO_SIZE  (1024 * 1024)
  45
  46 uint32_t r300_translate_primitive(unsigned prim)
  47 {
  48     switch (prim) {
  49         case PIPE_PRIM_POINTS:
  50             return R300_VAP_VF_CNTL__PRIM_POINTS;
  51         case PIPE_PRIM_LINES:
  52             return R300_VAP_VF_CNTL__PRIM_LINES;
  53         case PIPE_PRIM_LINE_LOOP:
  54             return R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
  55         case PIPE_PRIM_LINE_STRIP:
  56             return R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
  57         case PIPE_PRIM_TRIANGLES:
  58             return R300_VAP_VF_CNTL__PRIM_TRIANGLES;
  59         case PIPE_PRIM_TRIANGLE_STRIP:
  60             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
  61         case PIPE_PRIM_TRIANGLE_FAN:
  62             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
  63         case PIPE_PRIM_QUADS:
  64             return R300_VAP_VF_CNTL__PRIM_QUADS;
  65         case PIPE_PRIM_QUAD_STRIP:
  66             return R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
  67         case PIPE_PRIM_POLYGON:
  68             return R300_VAP_VF_CNTL__PRIM_POLYGON;
  69         default:
  70             return 0;
  71     }
  72 }
  73
  74 static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
  75                                             unsigned mode)
  76 {
  77     struct r300_rs_state* rs = (struct r300_rs_state*)r300->rs_state.state;
  78     uint32_t color_control = rs->color_control;
  79
  80     /* By default (see r300_state.c:r300_create_rs_state) color_control is
  81      * initialized to provoking the first vertex.
  82      *
  83      * Triangle fans must be reduced to the second vertex, not the first, in
  84      * Gallium flatshade-first mode, as per the GL spec.
  85      * (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt)
  86      *
  87      * Quads never provoke correctly in flatshade-first mode. The first
  88      * vertex is never considered as provoking, so only the second, third,
  89      * and fourth vertices can be selected, and both "third" and "last" modes
  90      * select the fourth vertex. This is probably due to D3D lacking quads.
  91      *
  92      * Similarly, polygons reduce to the first, not the last, vertex, when in
  93      * "last" mode, and all other modes start from the second vertex.
  94      *
  95      * ~ C.
  96      */
  97
  98     if (rs->rs.flatshade_first) {
  99         switch (mode) {
 100             case PIPE_PRIM_TRIANGLE_FAN:
 101                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND;
 102                 break;
 103             case PIPE_PRIM_QUADS:
 104             case PIPE_PRIM_QUAD_STRIP:
 105             case PIPE_PRIM_POLYGON:
 106                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 107                 break;
 108             default:
 109                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST;
 110                 break;
 111         }
 112     } else {
 113         color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 114     }
 115
 116     return color_control;
 117 }
 118
 119 static void r300_emit_draw_immediate(struct r300_context *r300,
 120                                      unsigned mode,
 121                                      unsigned start,
 122                                      unsigned count)
 123 {
 124     struct pipe_buffer* vbo = r300->vertex_buffer[0].buffer;
 125     unsigned vertex_size = r300->vertex_buffer[0].stride / sizeof(float);
 126     unsigned i;
 127     uint32_t* map;
 128     CS_LOCALS(r300);
 129
 130     map = (uint32_t*)pipe_buffer_map_range(r300->context.screen, vbo,
 131             start * vertex_size, count * vertex_size,
 132             PIPE_BUFFER_USAGE_CPU_READ);
 133
 134     BEGIN_CS(10 + count * vertex_size);
 135     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 136             r300_provoking_vertex_fixes(r300, mode));
 137     OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
 138     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 139     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 140     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, count * vertex_size);
 141     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (count << 16) |
 142             r300_translate_primitive(mode));
 143     //debug_printf("r300: Immd %d verts, %d attrs\n", count, vertex_size);
 144     for (i = 0; i < count * vertex_size; i++) {
 145         if (i % vertex_size == 0) {
 146             //debug_printf("r300: -- vert --\n");
 147         }
 148         //debug_printf("r300: 0x%08x\n", *map);
 149         OUT_CS(*map);
 150         map++;
 151     }
 152     END_CS;
 153
 154     pipe_buffer_unmap(r300->context.screen, vbo);
 155 }
 156
 157 static void r300_emit_draw_arrays(struct r300_context *r300,
 158                                   unsigned mode,
 159                                   unsigned count)
 160 {
 161     CS_LOCALS(r300);
 162
 163     BEGIN_CS(8);
 164     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 165             r300_provoking_vertex_fixes(r300, mode));
 166     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 167     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 168     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 169     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 170            r300_translate_primitive(mode));
 171     END_CS;
 172 }
 173
 174 static void r300_emit_draw_elements(struct r300_context *r300,
 175                                     struct pipe_buffer* indexBuffer,
 176                                     unsigned indexSize,
 177                                     unsigned minIndex,
 178                                     unsigned maxIndex,
 179                                     unsigned mode,
 180                                     unsigned start,
 181                                     unsigned count)
 182 {
 183     uint32_t count_dwords;
 184     uint32_t offset_dwords = indexSize * start / sizeof(uint32_t);
 185     CS_LOCALS(r300);
 186
 187     /* XXX most of these are stupid */
 188     assert(indexSize == 4 || indexSize == 2);
 189     assert((start * indexSize)  % 4 == 0);
 190     assert(offset_dwords == 0);
 191
 192     BEGIN_CS(14);
 193     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 194             r300_provoking_vertex_fixes(r300, mode));
 195     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, minIndex);
 196     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, maxIndex);
 197     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
 198     if (indexSize == 4) {
 199         count_dwords = count + start;
 200         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 201                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 202                r300_translate_primitive(mode));
 203     } else {
 204         count_dwords = (count + start + 1) / 2;
 205         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 206                r300_translate_primitive(mode));
 207     }
 208
 209     /* INDX_BUFFER is a truly special packet3.
 210      * Unlike most other packet3, where the offset is after the count,
 211      * the order is reversed, so the relocation ends up carrying the
 212      * size of the indexbuf instead of the offset.
 213      *
 214      * XXX Fix offset
 215      */
 216     OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
 217     OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
 218            (0 << R300_INDX_BUFFER_SKIP_SHIFT));
 219     OUT_CS(offset_dwords);
 220     OUT_CS_RELOC(indexBuffer, count_dwords,
 221         RADEON_GEM_DOMAIN_GTT, 0, 0);
 222
 223     END_CS;
 224 }
 225
 226
 227 static boolean r300_setup_vertex_buffers(struct r300_context *r300)
 228 {
 229     struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
 230     struct pipe_vertex_element *velem = r300->vertex_element;
 231
 232 validate:
 233     for (int i = 0; i < r300->vertex_element_count; i++) {
 234         if (!r300->winsys->add_buffer(r300->winsys,
 235                 vbuf[velem[i].vertex_buffer_index].buffer,
 236             RADEON_GEM_DOMAIN_GTT, 0)) {
 237             r300->context.flush(&r300->context, 0, NULL);
 238             goto validate;
 239         }
 240     }
 241
 242     if (!r300->winsys->validate(r300->winsys)) {
 243         r300->context.flush(&r300->context, 0, NULL);
 244         return r300->winsys->validate(r300->winsys);
 245     }
 246
 247     return TRUE;
 248 }
 249
 250 static struct pipe_buffer* r300_translate_elts(struct r300_context* r300,
 251                                                struct pipe_buffer* elts,
 252                                                unsigned* size,
 253                                                unsigned* mode,
 254                                                unsigned* count)
 255 {
 256     struct pipe_screen* screen = r300->context.screen;
 257     struct pipe_buffer* new_elts;
 258     void *in_map, *out_map;
 259     unsigned out_prim, out_index_size, out_nr;
 260     struct pipe_rasterizer_state* rs;
 261     u_translate_func out_translate;
 262
 263     rs = &((struct r300_rs_state*)r300->rs_state.state)->rs;
 264
 265     if (rs->fill_cw == rs->fill_ccw &&
 266         rs->fill_cw != PIPE_POLYGON_MODE_FILL) {
 267         (void)u_unfilled_translator(*mode, *size, *count, rs->fill_cw,
 268             &out_prim, &out_index_size, &out_nr, &out_translate);
 269     } else {
 270         (void)u_index_translator(~0, *mode, *size, *count, PV_LAST, PV_LAST,
 271             &out_prim, &out_index_size, &out_nr, &out_translate);
 272     }
 273
 274     debug_printf("r300: old mode %d, new mode %d\n", *mode, out_prim);
 275     debug_printf("r300: old count %d, new count %d\n", *count, out_nr);
 276     debug_printf("r300: old size %d, new size %d\n", *size, out_index_size);
 277
 278     new_elts = screen->buffer_create(screen, 32,
 279                                      PIPE_BUFFER_USAGE_INDEX |
 280                                      PIPE_BUFFER_USAGE_CPU_WRITE |
 281                                      PIPE_BUFFER_USAGE_GPU_READ,
 282                                      out_index_size * out_nr);
 283
 284     in_map = pipe_buffer_map(screen, elts, PIPE_BUFFER_USAGE_CPU_READ);
 285     out_map = pipe_buffer_map(screen, new_elts, PIPE_BUFFER_USAGE_CPU_WRITE);
 286
 287     out_translate(in_map, *count, out_map);
 288
 289     pipe_buffer_unmap(screen, elts);
 290     pipe_buffer_unmap(screen, new_elts);
 291
 292     *size = out_index_size;
 293     *mode = out_prim;
 294     *count = out_nr;
 295
 296     return new_elts;
 297 }
 298
 299 /* This is the fast-path drawing & emission for HW TCL. */
 300 void r300_draw_range_elements(struct pipe_context* pipe,
 301                               struct pipe_buffer* indexBuffer,
 302                               unsigned indexSize,
 303                               unsigned minIndex,
 304                               unsigned maxIndex,
 305                               unsigned mode,
 306                               unsigned start,
 307                               unsigned count)
 308 {
 309     struct r300_context* r300 = r300_context(pipe);
 310     struct pipe_buffer* orgIndexBuffer = indexBuffer;
 311
 312     if (!u_trim_pipe_prim(mode, &count)) {
 313         return;
 314     }
 315
 316     if (count > 65535) {
 317        /* XXX: use aux/indices functions to split this into smaller
 318         * primitives.
 319         */
 320         return;
 321     }
 322
 323     r300_update_derived_state(r300);
 324
 325     if (!r300_setup_vertex_buffers(r300)) {
 326         return;
 327     }
 328
 329     if (indexSize == 1) {
 330         indexBuffer = r300_translate_elts(r300, indexBuffer,
 331             &indexSize, &mode, &count);
 332     }
 333
 334     if (!r300->winsys->add_buffer(r300->winsys, indexBuffer,
 335                                   RADEON_GEM_DOMAIN_GTT, 0)) {
 336         goto cleanup;
 337     }
 338
 339     if (!r300->winsys->validate(r300->winsys)) {
 340         goto cleanup;
 341     }
 342
 343     r300_emit_dirty_state(r300);
 344
 345     r300_emit_aos(r300, 0);
 346
 347     r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex, maxIndex,
 348                             mode, start, count);
 349
 350 cleanup:
 351     if (indexBuffer != orgIndexBuffer) {
 352         pipe->screen->buffer_destroy(indexBuffer);
 353     }
 354 }
 355
 356 /* Simple helpers for context setup. Should probably be moved to util. */
 357 void r300_draw_elements(struct pipe_context* pipe,
 358                         struct pipe_buffer* indexBuffer,
 359                         unsigned indexSize, unsigned mode,
 360                         unsigned start, unsigned count)
 361 {
 362    pipe->draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
 363                              mode, start, count);
 364 }
 365
 366 void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
 367                       unsigned start, unsigned count)
 368 {
 369     struct r300_context* r300 = r300_context(pipe);
 370
 371     if (!u_trim_pipe_prim(mode, &count)) {
 372         return;
 373     }
 374
 375     if (count > 65535) {
 376         /* XXX: driver needs to handle this -- use the functions in
 377          * aux/indices to split this into several smaller primitives.
 378          */
 379         return;
 380     }
 381
 382     r300_update_derived_state(r300);
 383
 384     if (!r300_setup_vertex_buffers(r300)) {
 385         return;
 386     }
 387
 388     r300_emit_dirty_state(r300);
 389
 390     if (FALSE && count <= 4 && r300->vertex_buffer_count == 1) {
 391         r300_emit_draw_immediate(r300, mode, start, count);
 392     } else {
 393         r300_emit_aos(r300, start);
 394         r300_emit_draw_arrays(r300, mode, count);
 395     }
 396 }
 397
 398 /****************************************************************************
 399  * The rest of this file is for SW TCL rendering only. Please be polite and *
 400  * keep these functions separated so that they are easier to locate. ~C.    *
 401  ***************************************************************************/
 402
 403 /* SW TCL arrays, using Draw. */
 404 void r300_swtcl_draw_arrays(struct pipe_context* pipe,
 405                                unsigned mode,
 406                                unsigned start,
 407                                unsigned count)
 408 {
 409     struct r300_context* r300 = r300_context(pipe);
 410     int i;
 411
 412     if (!u_trim_pipe_prim(mode, &count)) {
 413         return;
 414     }
 415
 416     for (i = 0; i < r300->vertex_buffer_count; i++) {
 417         void* buf = pipe_buffer_map(pipe->screen,
 418                                     r300->vertex_buffer[i].buffer,
 419                                     PIPE_BUFFER_USAGE_CPU_READ);
 420         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 421     }
 422
 423     draw_set_mapped_element_buffer(r300->draw, 0, NULL);
 424
 425     draw_set_mapped_constant_buffer(r300->draw,
 426                                     PIPE_SHADER_VERTEX,
 427                                     r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 428                                     r300->shader_constants[PIPE_SHADER_VERTEX].count *
 429                 (sizeof(float) * 4));
 430
 431     draw_arrays(r300->draw, mode, start, count);
 432
 433     for (i = 0; i < r300->vertex_buffer_count; i++) {
 434         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 435         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 436     }
 437 }
 438
 439 /* SW TCL elements, using Draw. */
 440 void r300_swtcl_draw_range_elements(struct pipe_context* pipe,
 441                                        struct pipe_buffer* indexBuffer,
 442                                        unsigned indexSize,
 443                                        unsigned minIndex,
 444                                        unsigned maxIndex,
 445                                        unsigned mode,
 446                                        unsigned start,
 447                                        unsigned count)
 448 {
 449     struct r300_context* r300 = r300_context(pipe);
 450     int i;
 451     void* indices;
 452
 453     if (!u_trim_pipe_prim(mode, &count)) {
 454         return;
 455     }
 456
 457     for (i = 0; i < r300->vertex_buffer_count; i++) {
 458         void* buf = pipe_buffer_map(pipe->screen,
 459                                     r300->vertex_buffer[i].buffer,
 460                                     PIPE_BUFFER_USAGE_CPU_READ);
 461         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 462     }
 463
 464     indices = pipe_buffer_map(pipe->screen, indexBuffer,
 465                               PIPE_BUFFER_USAGE_CPU_READ);
 466     draw_set_mapped_element_buffer_range(r300->draw, indexSize,
 467                                          minIndex, maxIndex, indices);
 468
 469     draw_set_mapped_constant_buffer(r300->draw,
 470                                     PIPE_SHADER_VERTEX,
 471             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 472             r300->shader_constants[PIPE_SHADER_VERTEX].count *
 473                 (sizeof(float) * 4));
 474
 475     draw_arrays(r300->draw, mode, start, count);
 476
 477     for (i = 0; i < r300->vertex_buffer_count; i++) {
 478         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 479         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 480     }
 481
 482     pipe_buffer_unmap(pipe->screen, indexBuffer);
 483     draw_set_mapped_element_buffer_range(r300->draw, 0, start,
 484                                          start + count - 1, NULL);
 485 }
 486
 487 /* Object for rendering using Draw. */
 488 struct r300_render {
 489     /* Parent class */
 490     struct vbuf_render base;
 491
 492     /* Pipe context */
 493     struct r300_context* r300;
 494
 495     /* Vertex information */
 496     size_t vertex_size;
 497     unsigned prim;
 498     unsigned hwprim;
 499
 500     /* VBO */
 501     struct pipe_buffer* vbo;
 502     size_t vbo_size;
 503     size_t vbo_offset;
 504     size_t vbo_max_used;
 505     void * vbo_ptr;
 506 };
 507
 508 static INLINE struct r300_render*
 509 r300_render(struct vbuf_render* render)
 510 {
 511     return (struct r300_render*)render;
 512 }
 513
 514 static const struct vertex_info*
 515 r300_render_get_vertex_info(struct vbuf_render* render)
 516 {
 517     struct r300_render* r300render = r300_render(render);
 518     struct r300_context* r300 = r300render->r300;
 519
 520     r300_update_derived_state(r300);
 521
 522     return &r300->vertex_info->vinfo;
 523 }
 524
 525 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
 526                                                    ushort vertex_size,
 527                                                    ushort count)
 528 {
 529     struct r300_render* r300render = r300_render(render);
 530     struct r300_context* r300 = r300render->r300;
 531     struct pipe_screen* screen = r300->context.screen;
 532     size_t size = (size_t)vertex_size * (size_t)count;
 533
 534     if (size + r300render->vbo_offset > r300render->vbo_size)
 535     {
 536         pipe_buffer_reference(&r300->vbo, NULL);
 537         r300render->vbo = pipe_buffer_create(screen,
 538                                              64,
 539                                              PIPE_BUFFER_USAGE_VERTEX,
 540                                              R300_MAX_VBO_SIZE);
 541         r300render->vbo_offset = 0;
 542         r300render->vbo_size = R300_MAX_VBO_SIZE;
 543     }
 544
 545     r300render->vertex_size = vertex_size;
 546     r300->vbo = r300render->vbo;
 547     r300->vbo_offset = r300render->vbo_offset;
 548
 549     return (r300render->vbo) ? TRUE : FALSE;
 550 }
 551
 552 static void* r300_render_map_vertices(struct vbuf_render* render)
 553 {
 554     struct r300_render* r300render = r300_render(render);
 555     struct pipe_screen* screen = r300render->r300->context.screen;
 556
 557     r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
 558                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 559
 560     return ((uint8_t*)r300render->vbo_ptr + r300render->vbo_offset);
 561 }
 562
 563 static void r300_render_unmap_vertices(struct vbuf_render* render,
 564                                              ushort min,
 565                                              ushort max)
 566 {
 567     struct r300_render* r300render = r300_render(render);
 568     struct pipe_screen* screen = r300render->r300->context.screen;
 569     CS_LOCALS(r300render->r300);
 570     BEGIN_CS(2);
 571     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 572     END_CS;
 573
 574     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 575                                     r300render->vertex_size * (max + 1));
 576     pipe_buffer_unmap(screen, r300render->vbo);
 577 }
 578
 579 static void r300_render_release_vertices(struct vbuf_render* render)
 580 {
 581     struct r300_render* r300render = r300_render(render);
 582
 583     r300render->vbo_offset += r300render->vbo_max_used;
 584     r300render->vbo_max_used = 0;
 585 }
 586
 587 static boolean r300_render_set_primitive(struct vbuf_render* render,
 588                                                unsigned prim)
 589 {
 590     struct r300_render* r300render = r300_render(render);
 591
 592     r300render->prim = prim;
 593     r300render->hwprim = r300_translate_primitive(prim);
 594
 595     return TRUE;
 596 }
 597
 598 static void r300_render_draw_arrays(struct vbuf_render* render,
 599                                           unsigned start,
 600                                           unsigned count)
 601 {
 602     struct r300_render* r300render = r300_render(render);
 603     struct r300_context* r300 = r300render->r300;
 604
 605     CS_LOCALS(r300);
 606
 607     r300_emit_dirty_state(r300);
 608
 609     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 610
 611     BEGIN_CS(2);
 612     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 613     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 614            r300render->hwprim);
 615     END_CS;
 616 }
 617
 618 static void r300_render_draw(struct vbuf_render* render,
 619                                    const ushort* indices,
 620                                    uint count)
 621 {
 622     struct r300_render* r300render = r300_render(render);
 623     struct r300_context* r300 = r300render->r300;
 624     int i;
 625
 626     CS_LOCALS(r300);
 627
 628     r300_emit_dirty_state(r300);
 629
 630     BEGIN_CS(2 + (count+1)/2);
 631     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 632     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 633            r300render->hwprim);
 634     for (i = 0; i < count-1; i += 2) {
 635         OUT_CS(indices[i+1] << 16 | indices[i]);
 636     }
 637     if (count % 2) {
 638         OUT_CS(indices[count-1]);
 639     }
 640     END_CS;
 641 }
 642
 643 static void r300_render_destroy(struct vbuf_render* render)
 644 {
 645     FREE(render);
 646 }
 647
 648 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 649 {
 650     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 651
 652     r300render->r300 = r300;
 653
 654     /* XXX find real numbers plz */
 655     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 656     r300render->base.max_indices = 16 * 1024;
 657
 658     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 659     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 660     r300render->base.map_vertices = r300_render_map_vertices;
 661     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 662     r300render->base.set_primitive = r300_render_set_primitive;
 663     r300render->base.draw = r300_render_draw;
 664     r300render->base.draw_arrays = r300_render_draw_arrays;
 665     r300render->base.release_vertices = r300_render_release_vertices;
 666     r300render->base.destroy = r300_render_destroy;
 667
 668     r300render->vbo = NULL;
 669     r300render->vbo_size = 0;
 670     r300render->vbo_offset = 0;
 671
 672     return &r300render->base;
 673 }
 674
 675 struct draw_stage* r300_draw_stage(struct r300_context* r300)
 676 {
 677     struct vbuf_render* render;
 678     struct draw_stage* stage;
 679
 680     render = r300_render_create(r300);
 681
 682     if (!render) {
 683         return NULL;
 684     }
 685
 686     stage = draw_vbuf_stage(r300->draw, render);
 687
 688     if (!stage) {
 689         render->destroy(render);
 690         return NULL;
 691     }
 692
 693     draw_set_render(r300->draw, render);
 694
 695     return stage;
 696 }