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 /* XXX The DRM rejects VAP_ALT_NUM_VERTICES.. */
  46 //#define ENABLE_ALT_NUM_VERTS
  47
  48 uint32_t r300_translate_primitive(unsigned prim)
  49 {
  50     switch (prim) {
  51         case PIPE_PRIM_POINTS:
  52             return R300_VAP_VF_CNTL__PRIM_POINTS;
  53         case PIPE_PRIM_LINES:
  54             return R300_VAP_VF_CNTL__PRIM_LINES;
  55         case PIPE_PRIM_LINE_LOOP:
  56             return R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
  57         case PIPE_PRIM_LINE_STRIP:
  58             return R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
  59         case PIPE_PRIM_TRIANGLES:
  60             return R300_VAP_VF_CNTL__PRIM_TRIANGLES;
  61         case PIPE_PRIM_TRIANGLE_STRIP:
  62             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
  63         case PIPE_PRIM_TRIANGLE_FAN:
  64             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
  65         case PIPE_PRIM_QUADS:
  66             return R300_VAP_VF_CNTL__PRIM_QUADS;
  67         case PIPE_PRIM_QUAD_STRIP:
  68             return R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
  69         case PIPE_PRIM_POLYGON:
  70             return R300_VAP_VF_CNTL__PRIM_POLYGON;
  71         default:
  72             return 0;
  73     }
  74 }
  75
  76 static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
  77                                             unsigned mode)
  78 {
  79     struct r300_rs_state* rs = (struct r300_rs_state*)r300->rs_state.state;
  80     uint32_t color_control = rs->color_control;
  81
  82     /* By default (see r300_state.c:r300_create_rs_state) color_control is
  83      * initialized to provoking the first vertex.
  84      *
  85      * Triangle fans must be reduced to the second vertex, not the first, in
  86      * Gallium flatshade-first mode, as per the GL spec.
  87      * (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt)
  88      *
  89      * Quads never provoke correctly in flatshade-first mode. The first
  90      * vertex is never considered as provoking, so only the second, third,
  91      * and fourth vertices can be selected, and both "third" and "last" modes
  92      * select the fourth vertex. This is probably due to D3D lacking quads.
  93      *
  94      * Similarly, polygons reduce to the first, not the last, vertex, when in
  95      * "last" mode, and all other modes start from the second vertex.
  96      *
  97      * ~ C.
  98      */
  99
 100     if (rs->rs.flatshade_first) {
 101         switch (mode) {
 102             case PIPE_PRIM_TRIANGLE_FAN:
 103                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND;
 104                 break;
 105             case PIPE_PRIM_QUADS:
 106             case PIPE_PRIM_QUAD_STRIP:
 107             case PIPE_PRIM_POLYGON:
 108                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 109                 break;
 110             default:
 111                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST;
 112                 break;
 113         }
 114     } else {
 115         color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 116     }
 117
 118     return color_control;
 119 }
 120
 121 /* Check if the requested number of dwords is available in the CS and
 122  * if not, flush. Return TRUE if the flush occured. */
 123 static boolean r300_reserve_cs_space(struct r300_context *r300,
 124                                      unsigned dwords)
 125 {
 126     if (!r300->winsys->check_cs(r300->winsys, dwords)) {
 127         r300->context.flush(&r300->context, 0, NULL);
 128         return TRUE;
 129     }
 130     return FALSE;
 131 }
 132
 133 static boolean immd_is_good_idea(struct r300_context *r300,
 134                                       unsigned count)
 135 {
 136     return count <= 4;
 137 }
 138
 139 static void r300_emit_draw_arrays_immediate(struct r300_context *r300,
 140                                             unsigned mode,
 141                                             unsigned start,
 142                                             unsigned count)
 143 {
 144     struct pipe_vertex_element* velem;
 145     struct pipe_vertex_buffer* vbuf;
 146     unsigned vertex_element_count = r300->velems->count;
 147     unsigned i, v, vbi, dw, elem_offset, dwords;
 148
 149     /* Size of the vertex, in dwords. */
 150     unsigned vertex_size = 0;
 151
 152     /* Offsets of the attribute, in dwords, from the start of the vertex. */
 153     unsigned offset[PIPE_MAX_ATTRIBS];
 154
 155     /* Size of the vertex element, in dwords. */
 156     unsigned size[PIPE_MAX_ATTRIBS];
 157
 158     /* Stride to the same attrib in the next vertex in the vertex buffer,
 159      * in dwords. */
 160     unsigned stride[PIPE_MAX_ATTRIBS] = {0};
 161
 162     /* Mapped vertex buffers. */
 163     uint32_t* map[PIPE_MAX_ATTRIBS] = {0};
 164
 165     CS_LOCALS(r300);
 166
 167     /* Calculate the vertex size, offsets, strides etc. and map the buffers. */
 168     for (i = 0; i < vertex_element_count; i++) {
 169         velem = &r300->velems->velem[i];
 170         offset[i] = velem->src_offset / 4;
 171         size[i] = util_format_get_blocksize(velem->src_format) / 4;
 172         vertex_size += size[i];
 173         vbi = velem->vertex_buffer_index;
 174
 175         /* Map the buffer. */
 176         if (!map[vbi]) {
 177             vbuf = &r300->vertex_buffer[vbi];
 178             map[vbi] = (uint32_t*)pipe_buffer_map(r300->context.screen,
 179                                                   vbuf->buffer,
 180                                                   PIPE_BUFFER_USAGE_CPU_READ);
 181             map[vbi] += vbuf->buffer_offset / 4;
 182             stride[vbi] = vbuf->stride / 4;
 183         }
 184     }
 185
 186     dwords = 10 + count * vertex_size;
 187
 188     r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + dwords);
 189     r300_emit_buffer_validate(r300, FALSE, NULL);
 190     r300_emit_dirty_state(r300);
 191
 192     BEGIN_CS(dwords);
 193     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 194             r300_provoking_vertex_fixes(r300, mode));
 195     OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
 196     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 197     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 198     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, count * vertex_size);
 199     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (count << 16) |
 200             r300_translate_primitive(mode));
 201
 202     /* Emit vertices. */
 203     for (v = 0; v < count; v++) {
 204         for (i = 0; i < vertex_element_count; i++) {
 205             velem = &r300->velems->velem[i];
 206             vbi = velem->vertex_buffer_index;
 207             elem_offset = offset[i] + stride[vbi] * (v + start);
 208
 209             for (dw = 0; dw < size[i]; dw++) {
 210                 OUT_CS(map[vbi][elem_offset + dw]);
 211             }
 212         }
 213     }
 214     END_CS;
 215
 216     /* Unmap buffers. */
 217     for (i = 0; i < vertex_element_count; i++) {
 218         vbi = r300->velems->velem[i].vertex_buffer_index;
 219
 220         if (map[vbi]) {
 221             vbuf = &r300->vertex_buffer[vbi];
 222             pipe_buffer_unmap(r300->context.screen, vbuf->buffer);
 223             map[vbi] = NULL;
 224         }
 225     }
 226 }
 227
 228 static void r300_emit_draw_arrays(struct r300_context *r300,
 229                                   unsigned mode,
 230                                   unsigned count)
 231 {
 232 #if defined(ENABLE_ALT_NUM_VERTS)
 233     boolean alt_num_verts = count > 65535;
 234 #else
 235     boolean alt_num_verts = FALSE;
 236 #endif
 237     CS_LOCALS(r300);
 238
 239     if (alt_num_verts) {
 240         assert(count < (1 << 24));
 241         BEGIN_CS(10);
 242         OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
 243     } else {
 244         BEGIN_CS(8);
 245     }
 246     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 247             r300_provoking_vertex_fixes(r300, mode));
 248     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 249     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 250     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 251     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 252            r300_translate_primitive(mode) |
 253            (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 254     END_CS;
 255 }
 256
 257 static void r300_emit_draw_elements(struct r300_context *r300,
 258                                     struct pipe_buffer* indexBuffer,
 259                                     unsigned indexSize,
 260                                     unsigned minIndex,
 261                                     unsigned maxIndex,
 262                                     unsigned mode,
 263                                     unsigned start,
 264                                     unsigned count)
 265 {
 266     uint32_t count_dwords;
 267     uint32_t offset_dwords = indexSize * start / sizeof(uint32_t);
 268 #if defined(ENABLE_ALT_NUM_VERTS)
 269     boolean alt_num_verts = count > 65535;
 270 #else
 271     boolean alt_num_verts = FALSE;
 272 #endif
 273     CS_LOCALS(r300);
 274
 275     assert((start * indexSize)  % 4 == 0);
 276     assert(count < (1 << 24));
 277
 278     DBG(r300, DBG_DRAW, "r300: Indexbuf of %u indices, min %u max %u\n",
 279         count, minIndex, maxIndex);
 280
 281     maxIndex = MIN2(maxIndex, r300->vertex_buffer_max_index);
 282
 283     if (alt_num_verts) {
 284         BEGIN_CS(16);
 285         OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
 286     } else {
 287         BEGIN_CS(14);
 288     }
 289     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 290             r300_provoking_vertex_fixes(r300, mode));
 291     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, minIndex);
 292     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, maxIndex);
 293     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
 294     if (indexSize == 4) {
 295         count_dwords = count;
 296         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 297                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 298                r300_translate_primitive(mode) |
 299                (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 300     } else {
 301         count_dwords = (count + 1) / 2;
 302         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 303                r300_translate_primitive(mode) |
 304                (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 305     }
 306
 307     /* INDX_BUFFER is a truly special packet3.
 308      * Unlike most other packet3, where the offset is after the count,
 309      * the order is reversed, so the relocation ends up carrying the
 310      * size of the indexbuf instead of the offset.
 311      */
 312     OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
 313     OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
 314            (0 << R300_INDX_BUFFER_SKIP_SHIFT));
 315     OUT_CS(offset_dwords << 2);
 316     OUT_CS_RELOC(indexBuffer, count_dwords,
 317         RADEON_GEM_DOMAIN_GTT, 0, 0);
 318
 319     END_CS;
 320 }
 321
 322 static boolean r300_setup_vertex_buffers(struct r300_context *r300)
 323 {
 324     struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
 325     struct pipe_vertex_element *velem = r300->velems->velem;
 326     struct pipe_buffer *pbuf;
 327
 328 validate:
 329     for (int i = 0; i < r300->velems->count; i++) {
 330         pbuf = vbuf[velem[i].vertex_buffer_index].buffer;
 331
 332         if (!r300->winsys->add_buffer(r300->winsys, pbuf,
 333                                       RADEON_GEM_DOMAIN_GTT, 0)) {
 334             r300->context.flush(&r300->context, 0, NULL);
 335             goto validate;
 336         }
 337     }
 338
 339     if (!r300->winsys->validate(r300->winsys)) {
 340         r300->context.flush(&r300->context, 0, NULL);
 341         return r300->winsys->validate(r300->winsys);
 342     }
 343
 344     return TRUE;
 345 }
 346
 347 static void r300_shorten_ubyte_elts(struct r300_context* r300,
 348                                     struct pipe_buffer** elts,
 349                                     unsigned count)
 350 {
 351     struct pipe_screen* screen = r300->context.screen;
 352     struct pipe_buffer* new_elts;
 353     unsigned char *in_map;
 354     unsigned short *out_map;
 355     unsigned i;
 356
 357     new_elts = screen->buffer_create(screen, 32,
 358                                      PIPE_BUFFER_USAGE_INDEX |
 359                                      PIPE_BUFFER_USAGE_CPU_WRITE |
 360                                      PIPE_BUFFER_USAGE_GPU_READ,
 361                                      2 * count);
 362
 363     in_map = pipe_buffer_map(screen, *elts, PIPE_BUFFER_USAGE_CPU_READ);
 364     out_map = pipe_buffer_map(screen, new_elts, PIPE_BUFFER_USAGE_CPU_WRITE);
 365
 366     for (i = 0; i < count; i++) {
 367         *out_map = (unsigned short)*in_map;
 368         in_map++;
 369         out_map++;
 370     }
 371
 372     pipe_buffer_unmap(screen, *elts);
 373     pipe_buffer_unmap(screen, new_elts);
 374
 375     *elts = new_elts;
 376 }
 377
 378 /* This is the fast-path drawing & emission for HW TCL. */
 379 void r300_draw_range_elements(struct pipe_context* pipe,
 380                               struct pipe_buffer* indexBuffer,
 381                               unsigned indexSize,
 382                               unsigned minIndex,
 383                               unsigned maxIndex,
 384                               unsigned mode,
 385                               unsigned start,
 386                               unsigned count)
 387 {
 388     struct r300_context* r300 = r300_context(pipe);
 389     struct pipe_buffer* orgIndexBuffer = indexBuffer;
 390 #if defined(ENABLE_ALT_NUM_VERTS)
 391     boolean alt_num_verts = r300_screen(pipe->screen)->caps->is_r500 &&
 392                             count > 65536;
 393 #else
 394     boolean alt_num_verts = FALSE;
 395 #endif
 396     unsigned short_count;
 397
 398     if (!u_trim_pipe_prim(mode, &count)) {
 399         return;
 400     }
 401
 402     if (indexSize == 1) {
 403         r300_shorten_ubyte_elts(r300, &indexBuffer, count);
 404         indexSize = 2;
 405     }
 406
 407     r300_update_derived_state(r300);
 408
 409     /* 128 dwords for emit_aos and emit_draw_elements */
 410     r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + 128);
 411     r300_emit_buffer_validate(r300, TRUE, indexBuffer);
 412     r300_emit_dirty_state(r300);
 413     r300_emit_aos(r300, 0);
 414
 415     if (alt_num_verts || count <= 65535) {
 416         r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex,
 417                                 maxIndex, mode, start, count);
 418     } else {
 419         do {
 420             short_count = MIN2(count, 65534);
 421             r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex,
 422                                     maxIndex, mode, start, short_count);
 423
 424             start += short_count;
 425             count -= short_count;
 426
 427             /* 16 spare dwords are enough for emit_draw_elements. */
 428             if (count && r300_reserve_cs_space(r300, 16)) {
 429                 r300_emit_buffer_validate(r300, TRUE, indexBuffer);
 430                 r300_emit_dirty_state(r300);
 431                 r300_emit_aos(r300, 0);
 432             }
 433         } while (count);
 434     }
 435
 436     if (indexBuffer != orgIndexBuffer) {
 437         pipe->screen->buffer_destroy(indexBuffer);
 438     }
 439 }
 440
 441 /* Simple helpers for context setup. Should probably be moved to util. */
 442 void r300_draw_elements(struct pipe_context* pipe,
 443                         struct pipe_buffer* indexBuffer,
 444                         unsigned indexSize, unsigned mode,
 445                         unsigned start, unsigned count)
 446 {
 447     struct r300_context *r300 = r300_context(pipe);
 448
 449     pipe->draw_range_elements(pipe, indexBuffer, indexSize, 0,
 450                               r300->vertex_buffer_max_index,
 451                               mode, start, count);
 452 }
 453
 454 void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
 455                       unsigned start, unsigned count)
 456 {
 457     struct r300_context* r300 = r300_context(pipe);
 458 #if defined(ENABLE_ALT_NUM_VERTS)
 459     boolean alt_num_verts = r300_screen(pipe->screen)->caps->is_r500 &&
 460                             count > 65536;
 461 #else
 462     boolean alt_num_verts = FALSE;
 463 #endif
 464     unsigned short_count;
 465
 466     if (!u_trim_pipe_prim(mode, &count)) {
 467         return;
 468     }
 469
 470     r300_update_derived_state(r300);
 471
 472     if (immd_is_good_idea(r300, count)) {
 473         r300_emit_draw_arrays_immediate(r300, mode, start, count);
 474     } else {
 475         /* Make sure there are at least 128 spare dwords in the command buffer.
 476          * (most of it being consumed by emit_aos) */
 477         r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + 128);
 478         r300_emit_buffer_validate(r300, TRUE, NULL);
 479         r300_emit_dirty_state(r300);
 480
 481         if (alt_num_verts || count <= 65535) {
 482             r300_emit_aos(r300, start);
 483             r300_emit_draw_arrays(r300, mode, count);
 484         } else {
 485             do {
 486                 short_count = MIN2(count, 65535);
 487                 r300_emit_aos(r300, start);
 488                 r300_emit_draw_arrays(r300, mode, short_count);
 489
 490                 start += short_count;
 491                 count -= short_count;
 492
 493                 /* Again, we emit both AOS and draw_arrays so there should be
 494                  * at least 128 spare dwords. */
 495                 if (count && r300_reserve_cs_space(r300, 128)) {
 496                     r300_emit_buffer_validate(r300, TRUE, NULL);
 497                     r300_emit_dirty_state(r300);
 498                 }
 499             } while (count);
 500         }
 501     }
 502 }
 503
 504 /****************************************************************************
 505  * The rest of this file is for SW TCL rendering only. Please be polite and *
 506  * keep these functions separated so that they are easier to locate. ~C.    *
 507  ***************************************************************************/
 508
 509 /* SW TCL arrays, using Draw. */
 510 void r300_swtcl_draw_arrays(struct pipe_context* pipe,
 511                                unsigned mode,
 512                                unsigned start,
 513                                unsigned count)
 514 {
 515     struct r300_context* r300 = r300_context(pipe);
 516     int i;
 517
 518     if (!u_trim_pipe_prim(mode, &count)) {
 519         return;
 520     }
 521
 522     for (i = 0; i < r300->vertex_buffer_count; i++) {
 523         void* buf = pipe_buffer_map(pipe->screen,
 524                                     r300->vertex_buffer[i].buffer,
 525                                     PIPE_BUFFER_USAGE_CPU_READ);
 526         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 527     }
 528
 529     draw_set_mapped_element_buffer(r300->draw, 0, NULL);
 530
 531     draw_set_mapped_constant_buffer(r300->draw,
 532                                     PIPE_SHADER_VERTEX,
 533                                     0,
 534                                     r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 535                                     r300->shader_constants[PIPE_SHADER_VERTEX].count *
 536                 (sizeof(float) * 4));
 537
 538     draw_arrays(r300->draw, mode, start, count);
 539
 540     for (i = 0; i < r300->vertex_buffer_count; i++) {
 541         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 542         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 543     }
 544 }
 545
 546 /* SW TCL elements, using Draw. */
 547 void r300_swtcl_draw_range_elements(struct pipe_context* pipe,
 548                                        struct pipe_buffer* indexBuffer,
 549                                        unsigned indexSize,
 550                                        unsigned minIndex,
 551                                        unsigned maxIndex,
 552                                        unsigned mode,
 553                                        unsigned start,
 554                                        unsigned count)
 555 {
 556     struct r300_context* r300 = r300_context(pipe);
 557     int i;
 558     void* indices;
 559
 560     if (!u_trim_pipe_prim(mode, &count)) {
 561         return;
 562     }
 563
 564     for (i = 0; i < r300->vertex_buffer_count; i++) {
 565         void* buf = pipe_buffer_map(pipe->screen,
 566                                     r300->vertex_buffer[i].buffer,
 567                                     PIPE_BUFFER_USAGE_CPU_READ);
 568         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 569     }
 570
 571     indices = pipe_buffer_map(pipe->screen, indexBuffer,
 572                               PIPE_BUFFER_USAGE_CPU_READ);
 573     draw_set_mapped_element_buffer_range(r300->draw, indexSize,
 574                                          minIndex, maxIndex, indices);
 575
 576     draw_set_mapped_constant_buffer(r300->draw,
 577                                     PIPE_SHADER_VERTEX,
 578                                     0,
 579             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 580             r300->shader_constants[PIPE_SHADER_VERTEX].count *
 581                 (sizeof(float) * 4));
 582
 583     draw_arrays(r300->draw, mode, start, count);
 584
 585     for (i = 0; i < r300->vertex_buffer_count; i++) {
 586         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 587         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 588     }
 589
 590     pipe_buffer_unmap(pipe->screen, indexBuffer);
 591     draw_set_mapped_element_buffer_range(r300->draw, 0, start,
 592                                          start + count - 1, NULL);
 593 }
 594
 595 /* Object for rendering using Draw. */
 596 struct r300_render {
 597     /* Parent class */
 598     struct vbuf_render base;
 599
 600     /* Pipe context */
 601     struct r300_context* r300;
 602
 603     /* Vertex information */
 604     size_t vertex_size;
 605     unsigned prim;
 606     unsigned hwprim;
 607
 608     /* VBO */
 609     struct pipe_buffer* vbo;
 610     size_t vbo_size;
 611     size_t vbo_offset;
 612     size_t vbo_max_used;
 613     void * vbo_ptr;
 614 };
 615
 616 static INLINE struct r300_render*
 617 r300_render(struct vbuf_render* render)
 618 {
 619     return (struct r300_render*)render;
 620 }
 621
 622 static const struct vertex_info*
 623 r300_render_get_vertex_info(struct vbuf_render* render)
 624 {
 625     struct r300_render* r300render = r300_render(render);
 626     struct r300_context* r300 = r300render->r300;
 627
 628     r300_update_derived_state(r300);
 629
 630     return &r300->vertex_info;
 631 }
 632
 633 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
 634                                                    ushort vertex_size,
 635                                                    ushort count)
 636 {
 637     struct r300_render* r300render = r300_render(render);
 638     struct r300_context* r300 = r300render->r300;
 639     struct pipe_screen* screen = r300->context.screen;
 640     size_t size = (size_t)vertex_size * (size_t)count;
 641
 642     if (size + r300render->vbo_offset > r300render->vbo_size)
 643     {
 644         pipe_buffer_reference(&r300->vbo, NULL);
 645         r300render->vbo = pipe_buffer_create(screen,
 646                                              64,
 647                                              PIPE_BUFFER_USAGE_VERTEX,
 648                                              R300_MAX_VBO_SIZE);
 649         r300render->vbo_offset = 0;
 650         r300render->vbo_size = R300_MAX_VBO_SIZE;
 651     }
 652
 653     r300render->vertex_size = vertex_size;
 654     r300->vbo = r300render->vbo;
 655     r300->vbo_offset = r300render->vbo_offset;
 656
 657     return (r300render->vbo) ? TRUE : FALSE;
 658 }
 659
 660 static void* r300_render_map_vertices(struct vbuf_render* render)
 661 {
 662     struct r300_render* r300render = r300_render(render);
 663     struct pipe_screen* screen = r300render->r300->context.screen;
 664
 665     r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
 666                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 667
 668     return ((uint8_t*)r300render->vbo_ptr + r300render->vbo_offset);
 669 }
 670
 671 static void r300_render_unmap_vertices(struct vbuf_render* render,
 672                                              ushort min,
 673                                              ushort max)
 674 {
 675     struct r300_render* r300render = r300_render(render);
 676     struct pipe_screen* screen = r300render->r300->context.screen;
 677     CS_LOCALS(r300render->r300);
 678     BEGIN_CS(2);
 679     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 680     END_CS;
 681
 682     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 683                                     r300render->vertex_size * (max + 1));
 684     pipe_buffer_unmap(screen, r300render->vbo);
 685 }
 686
 687 static void r300_render_release_vertices(struct vbuf_render* render)
 688 {
 689     struct r300_render* r300render = r300_render(render);
 690
 691     r300render->vbo_offset += r300render->vbo_max_used;
 692     r300render->vbo_max_used = 0;
 693 }
 694
 695 static boolean r300_render_set_primitive(struct vbuf_render* render,
 696                                                unsigned prim)
 697 {
 698     struct r300_render* r300render = r300_render(render);
 699
 700     r300render->prim = prim;
 701     r300render->hwprim = r300_translate_primitive(prim);
 702
 703     return TRUE;
 704 }
 705
 706 static void r300_render_draw_arrays(struct vbuf_render* render,
 707                                           unsigned start,
 708                                           unsigned count)
 709 {
 710     struct r300_render* r300render = r300_render(render);
 711     struct r300_context* r300 = r300render->r300;
 712
 713     CS_LOCALS(r300);
 714
 715     r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + 2);
 716     r300_emit_buffer_validate(r300, FALSE, NULL);
 717     r300_emit_dirty_state(r300);
 718
 719     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 720
 721     BEGIN_CS(2);
 722     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 723     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 724            r300render->hwprim);
 725     END_CS;
 726 }
 727
 728 static void r300_render_draw(struct vbuf_render* render,
 729                                    const ushort* indices,
 730                                    uint count)
 731 {
 732     struct r300_render* r300render = r300_render(render);
 733     struct r300_context* r300 = r300render->r300;
 734     int i;
 735     unsigned dwords = 2 + (count+1)/2;
 736
 737     CS_LOCALS(r300);
 738
 739     r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + dwords);
 740     r300_emit_buffer_validate(r300, FALSE, NULL);
 741     r300_emit_dirty_state(r300);
 742
 743     BEGIN_CS(dwords);
 744     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 745     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 746            r300render->hwprim);
 747     for (i = 0; i < count-1; i += 2) {
 748         OUT_CS(indices[i+1] << 16 | indices[i]);
 749     }
 750     if (count % 2) {
 751         OUT_CS(indices[count-1]);
 752     }
 753     END_CS;
 754 }
 755
 756 static void r300_render_destroy(struct vbuf_render* render)
 757 {
 758     FREE(render);
 759 }
 760
 761 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 762 {
 763     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 764
 765     r300render->r300 = r300;
 766
 767     /* XXX find real numbers plz */
 768     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 769     r300render->base.max_indices = 16 * 1024;
 770
 771     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 772     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 773     r300render->base.map_vertices = r300_render_map_vertices;
 774     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 775     r300render->base.set_primitive = r300_render_set_primitive;
 776     r300render->base.draw = r300_render_draw;
 777     r300render->base.draw_arrays = r300_render_draw_arrays;
 778     r300render->base.release_vertices = r300_render_release_vertices;
 779     r300render->base.destroy = r300_render_destroy;
 780
 781     r300render->vbo = NULL;
 782     r300render->vbo_size = 0;
 783     r300render->vbo_offset = 0;
 784
 785     return &r300render->base;
 786 }
 787
 788 struct draw_stage* r300_draw_stage(struct r300_context* r300)
 789 {
 790     struct vbuf_render* render;
 791     struct draw_stage* stage;
 792
 793     render = r300_render_create(r300);
 794
 795     if (!render) {
 796         return NULL;
 797     }
 798
 799     stage = draw_vbuf_stage(r300->draw, render);
 800
 801     if (!stage) {
 802         render->destroy(render);
 803         return NULL;
 804     }
 805
 806     draw_set_render(r300->draw, render);
 807
 808     return stage;
 809 }