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 "util/u_inlines.h"
  30
  31 #include "util/u_format.h"
  32 #include "util/u_memory.h"
  33 #include "util/u_prim.h"
  34
  35 #include "r300_cs.h"
  36 #include "r300_context.h"
  37 #include "r300_emit.h"
  38 #include "r300_reg.h"
  39 #include "r300_render.h"
  40 #include "r300_state_derived.h"
  41
  42 /* r300_render: Vertex and index buffer primitive emission. */
  43 #define R300_MAX_VBO_SIZE  (1024 * 1024)
  44
  45 uint32_t r300_translate_primitive(unsigned prim)
  46 {
  47     switch (prim) {
  48         case PIPE_PRIM_POINTS:
  49             return R300_VAP_VF_CNTL__PRIM_POINTS;
  50         case PIPE_PRIM_LINES:
  51             return R300_VAP_VF_CNTL__PRIM_LINES;
  52         case PIPE_PRIM_LINE_LOOP:
  53             return R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
  54         case PIPE_PRIM_LINE_STRIP:
  55             return R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
  56         case PIPE_PRIM_TRIANGLES:
  57             return R300_VAP_VF_CNTL__PRIM_TRIANGLES;
  58         case PIPE_PRIM_TRIANGLE_STRIP:
  59             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
  60         case PIPE_PRIM_TRIANGLE_FAN:
  61             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
  62         case PIPE_PRIM_QUADS:
  63             return R300_VAP_VF_CNTL__PRIM_QUADS;
  64         case PIPE_PRIM_QUAD_STRIP:
  65             return R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
  66         case PIPE_PRIM_POLYGON:
  67             return R300_VAP_VF_CNTL__PRIM_POLYGON;
  68         default:
  69             return 0;
  70     }
  71 }
  72
  73 static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
  74                                             unsigned mode)
  75 {
  76     struct r300_rs_state* rs = (struct r300_rs_state*)r300->rs_state.state;
  77     uint32_t color_control = rs->color_control;
  78
  79     /* By default (see r300_state.c:r300_create_rs_state) color_control is
  80      * initialized to provoking the first vertex.
  81      *
  82      * Triangle fans must be reduced to the second vertex, not the first, in
  83      * Gallium flatshade-first mode, as per the GL spec.
  84      * (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt)
  85      *
  86      * Quads never provoke correctly in flatshade-first mode. The first
  87      * vertex is never considered as provoking, so only the second, third,
  88      * and fourth vertices can be selected, and both "third" and "last" modes
  89      * select the fourth vertex. This is probably due to D3D lacking quads.
  90      *
  91      * Similarly, polygons reduce to the first, not the last, vertex, when in
  92      * "last" mode, and all other modes start from the second vertex.
  93      *
  94      * ~ C.
  95      */
  96
  97     if (rs->rs.flatshade_first) {
  98         switch (mode) {
  99             case PIPE_PRIM_TRIANGLE_FAN:
 100                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND;
 101                 break;
 102             case PIPE_PRIM_QUADS:
 103             case PIPE_PRIM_QUAD_STRIP:
 104             case PIPE_PRIM_POLYGON:
 105                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 106                 break;
 107             default:
 108                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST;
 109                 break;
 110         }
 111     } else {
 112         color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 113     }
 114
 115     return color_control;
 116 }
 117
 118 static boolean immd_is_good_idea(struct r300_context *r300,
 119                                       unsigned count)
 120 {
 121     return count <= 4;
 122 }
 123
 124 static void r300_emit_draw_arrays_immediate(struct r300_context *r300,
 125                                             unsigned mode,
 126                                             unsigned start,
 127                                             unsigned count)
 128 {
 129     struct pipe_vertex_element* velem;
 130     struct pipe_vertex_buffer* vbuf;
 131     unsigned vertex_element_count = r300->velems->count;
 132     unsigned i, v, vbi, dw, elem_offset;
 133
 134     /* Size of the vertex, in dwords. */
 135     unsigned vertex_size = 0;
 136
 137     /* Offsets of the attribute, in dwords, from the start of the vertex. */
 138     unsigned offset[PIPE_MAX_ATTRIBS];
 139
 140     /* Size of the vertex element, in dwords. */
 141     unsigned size[PIPE_MAX_ATTRIBS];
 142
 143     /* Stride to the same attrib in the next vertex in the vertex buffer,
 144      * in dwords. */
 145     unsigned stride[PIPE_MAX_ATTRIBS] = {0};
 146
 147     /* Mapped vertex buffers. */
 148     uint32_t* map[PIPE_MAX_ATTRIBS] = {0};
 149
 150     CS_LOCALS(r300);
 151
 152     /* Calculate the vertex size, offsets, strides etc. and map the buffers. */
 153     for (i = 0; i < vertex_element_count; i++) {
 154         velem = &r300->velems->velem[i];
 155         offset[i] = velem->src_offset / 4;
 156         size[i] = util_format_get_blocksize(velem->src_format) / 4;
 157         vertex_size += size[i];
 158         vbi = velem->vertex_buffer_index;
 159
 160         /* Map the buffer. */
 161         if (!map[vbi]) {
 162             vbuf = &r300->vertex_buffer[vbi];
 163             map[vbi] = (uint32_t*)pipe_buffer_map(r300->context.screen,
 164                                                   vbuf->buffer,
 165                                                   PIPE_BUFFER_USAGE_CPU_READ);
 166             map[vbi] += vbuf->buffer_offset / 4;
 167             stride[vbi] = vbuf->stride / 4;
 168         }
 169     }
 170
 171     r300_emit_dirty_state(r300);
 172
 173     BEGIN_CS(10 + count * vertex_size);
 174     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 175             r300_provoking_vertex_fixes(r300, mode));
 176     OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
 177     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 178     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 179     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, count * vertex_size);
 180     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (count << 16) |
 181             r300_translate_primitive(mode));
 182
 183     /* Emit vertices. */
 184     for (v = 0; v < count; v++) {
 185         for (i = 0; i < vertex_element_count; i++) {
 186             velem = &r300->velems->velem[i];
 187             vbi = velem->vertex_buffer_index;
 188             elem_offset = offset[i] + stride[vbi] * (v + start);
 189
 190             for (dw = 0; dw < size[i]; dw++) {
 191                 OUT_CS(map[vbi][elem_offset + dw]);
 192             }
 193         }
 194     }
 195     END_CS;
 196
 197     /* Unmap buffers. */
 198     for (i = 0; i < vertex_element_count; i++) {
 199         vbi = r300->velems->velem[i].vertex_buffer_index;
 200
 201         if (map[vbi]) {
 202             vbuf = &r300->vertex_buffer[vbi];
 203             pipe_buffer_unmap(r300->context.screen, vbuf->buffer);
 204             map[vbi] = NULL;
 205         }
 206     }
 207 }
 208
 209 static void r300_emit_draw_arrays(struct r300_context *r300,
 210                                   unsigned mode,
 211                                   unsigned count)
 212 {
 213     CS_LOCALS(r300);
 214
 215     BEGIN_CS(8);
 216     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 217             r300_provoking_vertex_fixes(r300, mode));
 218     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 219     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 220     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 221     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 222            r300_translate_primitive(mode));
 223     END_CS;
 224 }
 225
 226 static void r300_emit_draw_elements(struct r300_context *r300,
 227                                     struct pipe_buffer* indexBuffer,
 228                                     unsigned indexSize,
 229                                     unsigned minIndex,
 230                                     unsigned maxIndex,
 231                                     unsigned mode,
 232                                     unsigned start,
 233                                     unsigned count)
 234 {
 235     uint32_t count_dwords;
 236     uint32_t offset_dwords = indexSize * start / sizeof(uint32_t);
 237     CS_LOCALS(r300);
 238
 239     /* XXX most of these are stupid */
 240     assert(indexSize == 4 || indexSize == 2);
 241     assert((start * indexSize)  % 4 == 0);
 242     assert(offset_dwords == 0);
 243
 244     BEGIN_CS(14);
 245     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 246             r300_provoking_vertex_fixes(r300, mode));
 247     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, minIndex);
 248     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, maxIndex);
 249     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
 250     if (indexSize == 4) {
 251         count_dwords = count + start;
 252         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 253                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 254                r300_translate_primitive(mode));
 255     } else {
 256         count_dwords = (count + start + 1) / 2;
 257         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 258                r300_translate_primitive(mode));
 259     }
 260
 261     /* INDX_BUFFER is a truly special packet3.
 262      * Unlike most other packet3, where the offset is after the count,
 263      * the order is reversed, so the relocation ends up carrying the
 264      * size of the indexbuf instead of the offset.
 265      *
 266      * XXX Fix offset
 267      */
 268     OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
 269     OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
 270            (0 << R300_INDX_BUFFER_SKIP_SHIFT));
 271     OUT_CS(offset_dwords);
 272     OUT_CS_RELOC(indexBuffer, count_dwords,
 273         RADEON_GEM_DOMAIN_GTT, 0, 0);
 274
 275     END_CS;
 276 }
 277
 278 static boolean r300_setup_vertex_buffers(struct r300_context *r300)
 279 {
 280     struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
 281     struct pipe_vertex_element *velem = r300->velems->velem;
 282     struct pipe_buffer *pbuf;
 283
 284 validate:
 285     for (int i = 0; i < r300->velems->count; i++) {
 286         pbuf = vbuf[velem[i].vertex_buffer_index].buffer;
 287
 288         if (!r300->winsys->add_buffer(r300->winsys, pbuf,
 289                                       RADEON_GEM_DOMAIN_GTT, 0)) {
 290             r300->context.flush(&r300->context, 0, NULL);
 291             goto validate;
 292         }
 293     }
 294
 295     if (!r300->winsys->validate(r300->winsys)) {
 296         r300->context.flush(&r300->context, 0, NULL);
 297         return r300->winsys->validate(r300->winsys);
 298     }
 299
 300     return TRUE;
 301 }
 302
 303 static void r300_shorten_ubyte_elts(struct r300_context* r300,
 304                                     struct pipe_buffer** elts,
 305                                     unsigned count)
 306 {
 307     struct pipe_screen* screen = r300->context.screen;
 308     struct pipe_buffer* new_elts;
 309     unsigned char *in_map;
 310     unsigned short *out_map;
 311     unsigned i;
 312
 313     new_elts = screen->buffer_create(screen, 32,
 314                                      PIPE_BUFFER_USAGE_INDEX |
 315                                      PIPE_BUFFER_USAGE_CPU_WRITE |
 316                                      PIPE_BUFFER_USAGE_GPU_READ,
 317                                      2 * count);
 318
 319     in_map = pipe_buffer_map(screen, *elts, PIPE_BUFFER_USAGE_CPU_READ);
 320     out_map = pipe_buffer_map(screen, new_elts, PIPE_BUFFER_USAGE_CPU_WRITE);
 321
 322     for (i = 0; i < count; i++) {
 323         *out_map = (unsigned short)*in_map;
 324         in_map++;
 325         out_map++;
 326     }
 327
 328     pipe_buffer_unmap(screen, *elts);
 329     pipe_buffer_unmap(screen, new_elts);
 330
 331     *elts = new_elts;
 332 }
 333
 334 /* This is the fast-path drawing & emission for HW TCL. */
 335 void r300_draw_range_elements(struct pipe_context* pipe,
 336                               struct pipe_buffer* indexBuffer,
 337                               unsigned indexSize,
 338                               unsigned minIndex,
 339                               unsigned maxIndex,
 340                               unsigned mode,
 341                               unsigned start,
 342                               unsigned count)
 343 {
 344     struct r300_context* r300 = r300_context(pipe);
 345     struct pipe_buffer* orgIndexBuffer = indexBuffer;
 346
 347     if (!u_trim_pipe_prim(mode, &count)) {
 348         return;
 349     }
 350
 351     if (count > 65535) {
 352        /* XXX: use aux/indices functions to split this into smaller
 353         * primitives.
 354         */
 355         return;
 356     }
 357
 358     r300_update_derived_state(r300);
 359
 360     r300_emit_buffer_validate(r300);
 361
 362     if (!r300_setup_vertex_buffers(r300)) {
 363         return;
 364     }
 365
 366     if (indexSize == 1) {
 367         r300_shorten_ubyte_elts(r300, &indexBuffer, count);
 368         indexSize = 2;
 369     }
 370
 371     if (!r300->winsys->add_buffer(r300->winsys, indexBuffer,
 372                                   RADEON_GEM_DOMAIN_GTT, 0)) {
 373         goto cleanup;
 374     }
 375
 376     if (!r300->winsys->validate(r300->winsys)) {
 377         goto cleanup;
 378     }
 379
 380     r300_emit_dirty_state(r300);
 381
 382     r300_emit_aos(r300, 0);
 383
 384     r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex, maxIndex,
 385                             mode, start, count);
 386
 387 cleanup:
 388     if (indexBuffer != orgIndexBuffer) {
 389         pipe->screen->buffer_destroy(indexBuffer);
 390     }
 391 }
 392
 393 /* Simple helpers for context setup. Should probably be moved to util. */
 394 void r300_draw_elements(struct pipe_context* pipe,
 395                         struct pipe_buffer* indexBuffer,
 396                         unsigned indexSize, unsigned mode,
 397                         unsigned start, unsigned count)
 398 {
 399    pipe->draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
 400                              mode, start, count);
 401 }
 402
 403 void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
 404                       unsigned start, unsigned count)
 405 {
 406     struct r300_context* r300 = r300_context(pipe);
 407
 408     if (!u_trim_pipe_prim(mode, &count)) {
 409         return;
 410     }
 411
 412     if (count > 65535) {
 413         /* XXX: driver needs to handle this -- use the functions in
 414          * aux/indices to split this into several smaller primitives.
 415          */
 416         return;
 417     }
 418
 419     r300_update_derived_state(r300);
 420
 421     r300_emit_buffer_validate(r300);
 422
 423     if (immd_is_good_idea(r300, count)) {
 424         r300_emit_draw_arrays_immediate(r300, mode, start, count);
 425     } else {
 426         if (!r300_setup_vertex_buffers(r300)) {
 427             return;
 428         }
 429
 430         r300_emit_dirty_state(r300);
 431         r300_emit_aos(r300, start);
 432         r300_emit_draw_arrays(r300, mode, count);
 433     }
 434 }
 435
 436 /****************************************************************************
 437  * The rest of this file is for SW TCL rendering only. Please be polite and *
 438  * keep these functions separated so that they are easier to locate. ~C.    *
 439  ***************************************************************************/
 440
 441 /* SW TCL arrays, using Draw. */
 442 void r300_swtcl_draw_arrays(struct pipe_context* pipe,
 443                                unsigned mode,
 444                                unsigned start,
 445                                unsigned count)
 446 {
 447     struct r300_context* r300 = r300_context(pipe);
 448     int i;
 449
 450     if (!u_trim_pipe_prim(mode, &count)) {
 451         return;
 452     }
 453
 454     for (i = 0; i < r300->vertex_buffer_count; i++) {
 455         void* buf = pipe_buffer_map(pipe->screen,
 456                                     r300->vertex_buffer[i].buffer,
 457                                     PIPE_BUFFER_USAGE_CPU_READ);
 458         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 459     }
 460
 461     draw_set_mapped_element_buffer(r300->draw, 0, NULL);
 462
 463     draw_set_mapped_constant_buffer(r300->draw,
 464                                     PIPE_SHADER_VERTEX,
 465                                     0,
 466                                     r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 467                                     r300->shader_constants[PIPE_SHADER_VERTEX].count *
 468                 (sizeof(float) * 4));
 469
 470     draw_arrays(r300->draw, mode, start, count);
 471
 472     for (i = 0; i < r300->vertex_buffer_count; i++) {
 473         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 474         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 475     }
 476 }
 477
 478 /* SW TCL elements, using Draw. */
 479 void r300_swtcl_draw_range_elements(struct pipe_context* pipe,
 480                                        struct pipe_buffer* indexBuffer,
 481                                        unsigned indexSize,
 482                                        unsigned minIndex,
 483                                        unsigned maxIndex,
 484                                        unsigned mode,
 485                                        unsigned start,
 486                                        unsigned count)
 487 {
 488     struct r300_context* r300 = r300_context(pipe);
 489     int i;
 490     void* indices;
 491
 492     if (!u_trim_pipe_prim(mode, &count)) {
 493         return;
 494     }
 495
 496     for (i = 0; i < r300->vertex_buffer_count; i++) {
 497         void* buf = pipe_buffer_map(pipe->screen,
 498                                     r300->vertex_buffer[i].buffer,
 499                                     PIPE_BUFFER_USAGE_CPU_READ);
 500         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 501     }
 502
 503     indices = pipe_buffer_map(pipe->screen, indexBuffer,
 504                               PIPE_BUFFER_USAGE_CPU_READ);
 505     draw_set_mapped_element_buffer_range(r300->draw, indexSize,
 506                                          minIndex, maxIndex, indices);
 507
 508     draw_set_mapped_constant_buffer(r300->draw,
 509                                     PIPE_SHADER_VERTEX,
 510                                     0,
 511             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 512             r300->shader_constants[PIPE_SHADER_VERTEX].count *
 513                 (sizeof(float) * 4));
 514
 515     draw_arrays(r300->draw, mode, start, count);
 516
 517     for (i = 0; i < r300->vertex_buffer_count; i++) {
 518         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 519         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 520     }
 521
 522     pipe_buffer_unmap(pipe->screen, indexBuffer);
 523     draw_set_mapped_element_buffer_range(r300->draw, 0, start,
 524                                          start + count - 1, NULL);
 525 }
 526
 527 /* Object for rendering using Draw. */
 528 struct r300_render {
 529     /* Parent class */
 530     struct vbuf_render base;
 531
 532     /* Pipe context */
 533     struct r300_context* r300;
 534
 535     /* Vertex information */
 536     size_t vertex_size;
 537     unsigned prim;
 538     unsigned hwprim;
 539
 540     /* VBO */
 541     struct pipe_buffer* vbo;
 542     size_t vbo_size;
 543     size_t vbo_offset;
 544     size_t vbo_max_used;
 545     void * vbo_ptr;
 546 };
 547
 548 static INLINE struct r300_render*
 549 r300_render(struct vbuf_render* render)
 550 {
 551     return (struct r300_render*)render;
 552 }
 553
 554 static const struct vertex_info*
 555 r300_render_get_vertex_info(struct vbuf_render* render)
 556 {
 557     struct r300_render* r300render = r300_render(render);
 558     struct r300_context* r300 = r300render->r300;
 559
 560     r300_update_derived_state(r300);
 561
 562     return (struct vertex_info*)r300->vertex_format_state.state;
 563 }
 564
 565 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
 566                                                    ushort vertex_size,
 567                                                    ushort count)
 568 {
 569     struct r300_render* r300render = r300_render(render);
 570     struct r300_context* r300 = r300render->r300;
 571     struct pipe_screen* screen = r300->context.screen;
 572     size_t size = (size_t)vertex_size * (size_t)count;
 573
 574     if (size + r300render->vbo_offset > r300render->vbo_size)
 575     {
 576         pipe_buffer_reference(&r300->vbo, NULL);
 577         r300render->vbo = pipe_buffer_create(screen,
 578                                              64,
 579                                              PIPE_BUFFER_USAGE_VERTEX,
 580                                              R300_MAX_VBO_SIZE);
 581         r300render->vbo_offset = 0;
 582         r300render->vbo_size = R300_MAX_VBO_SIZE;
 583     }
 584
 585     r300render->vertex_size = vertex_size;
 586     r300->vbo = r300render->vbo;
 587     r300->vbo_offset = r300render->vbo_offset;
 588
 589     return (r300render->vbo) ? TRUE : FALSE;
 590 }
 591
 592 static void* r300_render_map_vertices(struct vbuf_render* render)
 593 {
 594     struct r300_render* r300render = r300_render(render);
 595     struct pipe_screen* screen = r300render->r300->context.screen;
 596
 597     r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
 598                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 599
 600     return ((uint8_t*)r300render->vbo_ptr + r300render->vbo_offset);
 601 }
 602
 603 static void r300_render_unmap_vertices(struct vbuf_render* render,
 604                                              ushort min,
 605                                              ushort max)
 606 {
 607     struct r300_render* r300render = r300_render(render);
 608     struct pipe_screen* screen = r300render->r300->context.screen;
 609     CS_LOCALS(r300render->r300);
 610     BEGIN_CS(2);
 611     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 612     END_CS;
 613
 614     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 615                                     r300render->vertex_size * (max + 1));
 616     pipe_buffer_unmap(screen, r300render->vbo);
 617 }
 618
 619 static void r300_render_release_vertices(struct vbuf_render* render)
 620 {
 621     struct r300_render* r300render = r300_render(render);
 622
 623     r300render->vbo_offset += r300render->vbo_max_used;
 624     r300render->vbo_max_used = 0;
 625 }
 626
 627 static boolean r300_render_set_primitive(struct vbuf_render* render,
 628                                                unsigned prim)
 629 {
 630     struct r300_render* r300render = r300_render(render);
 631
 632     r300render->prim = prim;
 633     r300render->hwprim = r300_translate_primitive(prim);
 634
 635     return TRUE;
 636 }
 637
 638 static void r300_render_draw_arrays(struct vbuf_render* render,
 639                                           unsigned start,
 640                                           unsigned count)
 641 {
 642     struct r300_render* r300render = r300_render(render);
 643     struct r300_context* r300 = r300render->r300;
 644
 645     CS_LOCALS(r300);
 646
 647     r300_emit_dirty_state(r300);
 648
 649     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 650
 651     BEGIN_CS(2);
 652     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 653     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 654            r300render->hwprim);
 655     END_CS;
 656 }
 657
 658 static void r300_render_draw(struct vbuf_render* render,
 659                                    const ushort* indices,
 660                                    uint count)
 661 {
 662     struct r300_render* r300render = r300_render(render);
 663     struct r300_context* r300 = r300render->r300;
 664     int i;
 665
 666     CS_LOCALS(r300);
 667
 668     r300_emit_dirty_state(r300);
 669
 670     BEGIN_CS(2 + (count+1)/2);
 671     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 672     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 673            r300render->hwprim);
 674     for (i = 0; i < count-1; i += 2) {
 675         OUT_CS(indices[i+1] << 16 | indices[i]);
 676     }
 677     if (count % 2) {
 678         OUT_CS(indices[count-1]);
 679     }
 680     END_CS;
 681 }
 682
 683 static void r300_render_destroy(struct vbuf_render* render)
 684 {
 685     FREE(render);
 686 }
 687
 688 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 689 {
 690     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 691
 692     r300render->r300 = r300;
 693
 694     /* XXX find real numbers plz */
 695     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 696     r300render->base.max_indices = 16 * 1024;
 697
 698     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 699     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 700     r300render->base.map_vertices = r300_render_map_vertices;
 701     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 702     r300render->base.set_primitive = r300_render_set_primitive;
 703     r300render->base.draw = r300_render_draw;
 704     r300render->base.draw_arrays = r300_render_draw_arrays;
 705     r300render->base.release_vertices = r300_render_release_vertices;
 706     r300render->base.destroy = r300_render_destroy;
 707
 708     r300render->vbo = NULL;
 709     r300render->vbo_size = 0;
 710     r300render->vbo_offset = 0;
 711
 712     return &r300render->base;
 713 }
 714
 715 struct draw_stage* r300_draw_stage(struct r300_context* r300)
 716 {
 717     struct vbuf_render* render;
 718     struct draw_stage* stage;
 719
 720     render = r300_render_create(r300);
 721
 722     if (!render) {
 723         return NULL;
 724     }
 725
 726     stage = draw_vbuf_stage(r300->draw, render);
 727
 728     if (!stage) {
 729         render->destroy(render);
 730         return NULL;
 731     }
 732
 733     draw_set_render(r300->draw, render);
 734
 735     return stage;
 736 }