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_upload_mgr.h"
  34 #include "util/u_prim.h"
  35
  36 #include "r300_cs.h"
  37 #include "r300_context.h"
  38 #include "r300_screen_buffer.h"
  39 #include "r300_emit.h"
  40 #include "r300_reg.h"
  41 #include "r300_render.h"
  42 #include "r300_state_derived.h"
  43
  44 /* r300_render: Vertex and index buffer primitive emission. */
  45 #define R300_MAX_VBO_SIZE  (1024 * 1024)
  46
  47 /* XXX The DRM rejects VAP_ALT_NUM_VERTICES.. */
  48 //#define ENABLE_ALT_NUM_VERTS
  49
  50 uint32_t r300_translate_primitive(unsigned prim)
  51 {
  52     switch (prim) {
  53         case PIPE_PRIM_POINTS:
  54             return R300_VAP_VF_CNTL__PRIM_POINTS;
  55         case PIPE_PRIM_LINES:
  56             return R300_VAP_VF_CNTL__PRIM_LINES;
  57         case PIPE_PRIM_LINE_LOOP:
  58             return R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
  59         case PIPE_PRIM_LINE_STRIP:
  60             return R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
  61         case PIPE_PRIM_TRIANGLES:
  62             return R300_VAP_VF_CNTL__PRIM_TRIANGLES;
  63         case PIPE_PRIM_TRIANGLE_STRIP:
  64             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
  65         case PIPE_PRIM_TRIANGLE_FAN:
  66             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
  67         case PIPE_PRIM_QUADS:
  68             return R300_VAP_VF_CNTL__PRIM_QUADS;
  69         case PIPE_PRIM_QUAD_STRIP:
  70             return R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
  71         case PIPE_PRIM_POLYGON:
  72             return R300_VAP_VF_CNTL__PRIM_POLYGON;
  73         default:
  74             return 0;
  75     }
  76 }
  77
  78 static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
  79                                             unsigned mode)
  80 {
  81     struct r300_rs_state* rs = (struct r300_rs_state*)r300->rs_state.state;
  82     uint32_t color_control = rs->color_control;
  83
  84     /* By default (see r300_state.c:r300_create_rs_state) color_control is
  85      * initialized to provoking the first vertex.
  86      *
  87      * Triangle fans must be reduced to the second vertex, not the first, in
  88      * Gallium flatshade-first mode, as per the GL spec.
  89      * (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt)
  90      *
  91      * Quads never provoke correctly in flatshade-first mode. The first
  92      * vertex is never considered as provoking, so only the second, third,
  93      * and fourth vertices can be selected, and both "third" and "last" modes
  94      * select the fourth vertex. This is probably due to D3D lacking quads.
  95      *
  96      * Similarly, polygons reduce to the first, not the last, vertex, when in
  97      * "last" mode, and all other modes start from the second vertex.
  98      *
  99      * ~ C.
 100      */
 101
 102     if (rs->rs.flatshade_first) {
 103         switch (mode) {
 104             case PIPE_PRIM_TRIANGLE_FAN:
 105                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND;
 106                 break;
 107             case PIPE_PRIM_QUADS:
 108             case PIPE_PRIM_QUAD_STRIP:
 109             case PIPE_PRIM_POLYGON:
 110                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 111                 break;
 112             default:
 113                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST;
 114                 break;
 115         }
 116     } else {
 117         color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 118     }
 119
 120     return color_control;
 121 }
 122
 123 static boolean immd_is_good_idea(struct r300_context *r300,
 124                                       unsigned count)
 125 {
 126     return count <= 4;
 127 }
 128
 129 static void r300_emit_draw_arrays_immediate(struct r300_context *r300,
 130                                             unsigned mode,
 131                                             unsigned start,
 132                                             unsigned count)
 133 {
 134     struct pipe_vertex_element* velem;
 135     struct pipe_vertex_buffer* vbuf;
 136     unsigned vertex_element_count = r300->vertex_element_count;
 137     unsigned i, v, vbi, dw, elem_offset;
 138
 139     /* Size of the vertex, in dwords. */
 140     unsigned vertex_size = 0;
 141
 142     /* Offsets of the attribute, in dwords, from the start of the vertex. */
 143     unsigned offset[PIPE_MAX_ATTRIBS];
 144
 145     /* Size of the vertex element, in dwords. */
 146     unsigned size[PIPE_MAX_ATTRIBS];
 147
 148     /* Stride to the same attrib in the next vertex in the vertex buffer,
 149      * in dwords. */
 150     unsigned stride[PIPE_MAX_ATTRIBS] = {0};
 151
 152     /* Mapped vertex buffers. */
 153     uint32_t* map[PIPE_MAX_ATTRIBS] = {0};
 154
 155     CS_LOCALS(r300);
 156
 157     /* Calculate the vertex size, offsets, strides etc. and map the buffers. */
 158     for (i = 0; i < vertex_element_count; i++) {
 159         velem = &r300->vertex_element[i];
 160         offset[i] = velem->src_offset / 4;
 161         size[i] = util_format_get_blocksize(velem->src_format) / 4;
 162         vertex_size += size[i];
 163         vbi = velem->vertex_buffer_index;
 164
 165         /* Map the buffer. */
 166         if (!map[vbi]) {
 167             vbuf = &r300->vertex_buffer[vbi];
 168             map[vbi] = (uint32_t*)pipe_buffer_map(r300->context.screen,
 169                                                   vbuf->buffer,
 170                                                   PIPE_BUFFER_USAGE_CPU_READ);
 171             map[vbi] += vbuf->buffer_offset / 4;
 172             stride[vbi] = vbuf->stride / 4;
 173         }
 174     }
 175
 176     r300_emit_dirty_state(r300);
 177
 178     BEGIN_CS(10 + count * vertex_size);
 179     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 180             r300_provoking_vertex_fixes(r300, mode));
 181     OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
 182     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 183     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 184     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, count * vertex_size);
 185     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (count << 16) |
 186             r300_translate_primitive(mode));
 187
 188     /* Emit vertices. */
 189     for (v = 0; v < count; v++) {
 190         for (i = 0; i < vertex_element_count; i++) {
 191             velem = &r300->vertex_element[i];
 192             vbi = velem->vertex_buffer_index;
 193             elem_offset = offset[i] + stride[vbi] * (v + start);
 194
 195             for (dw = 0; dw < size[i]; dw++) {
 196                 OUT_CS(map[vbi][elem_offset + dw]);
 197             }
 198         }
 199     }
 200     END_CS;
 201
 202     /* Unmap buffers. */
 203     for (i = 0; i < vertex_element_count; i++) {
 204         vbi = r300->vertex_element[i].vertex_buffer_index;
 205
 206         if (map[vbi]) {
 207             vbuf = &r300->vertex_buffer[vbi];
 208             pipe_buffer_unmap(r300->context.screen, vbuf->buffer);
 209             map[vbi] = NULL;
 210         }
 211     }
 212 }
 213
 214 static void r300_emit_draw_arrays(struct r300_context *r300,
 215                                   unsigned mode,
 216                                   unsigned count)
 217 {
 218 #if defined(ENABLE_ALT_NUM_VERTS)
 219     boolean alt_num_verts = count > 65535;
 220 #else
 221     boolean alt_num_verts = FALSE;
 222 #endif
 223     CS_LOCALS(r300);
 224
 225     if (alt_num_verts) {
 226         assert(count < (1 << 24));
 227         BEGIN_CS(10);
 228         OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
 229     } else {
 230         BEGIN_CS(8);
 231     }
 232     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 233             r300_provoking_vertex_fixes(r300, mode));
 234     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 235     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 236     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 237     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 238            r300_translate_primitive(mode) |
 239            (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 240     END_CS;
 241 }
 242
 243 static void r300_emit_draw_elements(struct r300_context *r300,
 244                                     struct pipe_buffer* indexBuffer,
 245                                     unsigned indexSize,
 246                                     unsigned minIndex,
 247                                     unsigned maxIndex,
 248                                     unsigned mode,
 249                                     unsigned start,
 250                                     unsigned count)
 251 {
 252     uint32_t count_dwords;
 253     uint32_t offset_dwords = indexSize * start / sizeof(uint32_t);
 254 #if defined(ENABLE_ALT_NUM_VERTS)
 255     boolean alt_num_verts = count > 65535;
 256 #else
 257     boolean alt_num_verts = FALSE;
 258 #endif
 259     CS_LOCALS(r300);
 260
 261     assert((start * indexSize)  % 4 == 0);
 262
 263     /* XXX Non-zero offset locks up. */
 264     if (offset_dwords != 0) {
 265         return;
 266     }
 267
 268     if (alt_num_verts) {
 269         assert(count < (1 << 24));
 270         BEGIN_CS(16);
 271         OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
 272     } else {
 273         BEGIN_CS(14);
 274     }
 275     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 276             r300_provoking_vertex_fixes(r300, mode));
 277     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, minIndex);
 278     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, maxIndex);
 279     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
 280     if (indexSize == 4) {
 281         count_dwords = count + start;
 282         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 283                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 284                r300_translate_primitive(mode) |
 285                (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 286     } else {
 287         count_dwords = (count + start + 1) / 2;
 288         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 289                r300_translate_primitive(mode) |
 290                (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 291     }
 292
 293     /* INDX_BUFFER is a truly special packet3.
 294      * Unlike most other packet3, where the offset is after the count,
 295      * the order is reversed, so the relocation ends up carrying the
 296      * size of the indexbuf instead of the offset.
 297      */
 298     OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
 299     OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
 300            (0 << R300_INDX_BUFFER_SKIP_SHIFT));
 301     OUT_CS(offset_dwords << 2);
 302     OUT_CS_BUF_RELOC(indexBuffer, count_dwords,
 303         RADEON_GEM_DOMAIN_GTT, 0, 0);
 304
 305     END_CS;
 306 }
 307
 308 static boolean r300_setup_vertex_buffers(struct r300_context *r300)
 309 {
 310     struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
 311     struct pipe_vertex_element *velem = r300->vertex_element;
 312     struct pipe_buffer *pbuf;
 313     int ret;
 314
 315     /* upload buffers first */
 316     if (r300->any_user_vbs) {
 317         ret = r300_upload_user_buffers(r300);
 318         r300->any_user_vbs = false;
 319     }
 320
 321 validate:
 322     for (int i = 0; i < r300->vertex_element_count; i++) {
 323         pbuf = vbuf[velem[i].vertex_buffer_index].buffer;
 324
 325         if (!r300_add_buffer(r300->rws, pbuf,
 326                              RADEON_GEM_DOMAIN_GTT, 0)) {
 327             r300->context.flush(&r300->context, 0, NULL);
 328             goto validate;
 329         }
 330     }
 331
 332     if (!r300->rws->validate(r300->rws)) {
 333         r300->context.flush(&r300->context, 0, NULL);
 334         return r300->rws->validate(r300->rws);
 335     }
 336
 337     return TRUE;
 338 }
 339
 340 static void r300_shorten_ubyte_elts(struct r300_context* r300,
 341                                     struct pipe_buffer** elts,
 342                                     unsigned count)
 343 {
 344     struct pipe_screen* screen = r300->context.screen;
 345     struct pipe_buffer* new_elts;
 346     unsigned char *in_map;
 347     unsigned short *out_map;
 348     unsigned i;
 349
 350     new_elts = screen->buffer_create(screen, 32,
 351                                      PIPE_BUFFER_USAGE_INDEX |
 352                                      PIPE_BUFFER_USAGE_CPU_WRITE |
 353                                      PIPE_BUFFER_USAGE_GPU_READ,
 354                                      2 * count);
 355
 356     in_map = pipe_buffer_map(screen, *elts, PIPE_BUFFER_USAGE_CPU_READ);
 357     out_map = pipe_buffer_map(screen, new_elts, PIPE_BUFFER_USAGE_CPU_WRITE);
 358
 359     for (i = 0; i < count; i++) {
 360         *out_map = (unsigned short)*in_map;
 361         in_map++;
 362         out_map++;
 363     }
 364
 365     pipe_buffer_unmap(screen, *elts);
 366     pipe_buffer_unmap(screen, new_elts);
 367
 368     *elts = new_elts;
 369 }
 370
 371 /* This is the fast-path drawing & emission for HW TCL. */
 372 void r300_draw_range_elements(struct pipe_context* pipe,
 373                               struct pipe_buffer* indexBuffer,
 374                               unsigned indexSize,
 375                               unsigned minIndex,
 376                               unsigned maxIndex,
 377                               unsigned mode,
 378                               unsigned start,
 379                               unsigned count)
 380 {
 381     struct r300_context* r300 = r300_context(pipe);
 382     struct pipe_buffer* orgIndexBuffer = indexBuffer;
 383 #if defined(ENABLE_ALT_NUM_VERTS)
 384     boolean alt_num_verts = r300_screen(pipe->screen)->caps->is_r500 &&
 385                             count > 65536;
 386 #else
 387     boolean alt_num_verts = FALSE;
 388 #endif
 389     unsigned short_count;
 390
 391     if (!u_trim_pipe_prim(mode, &count)) {
 392         return;
 393     }
 394
 395     r300_update_derived_state(r300);
 396
 397     r300_emit_buffer_validate(r300);
 398
 399     if (!r300_setup_vertex_buffers(r300)) {
 400         return;
 401     }
 402
 403     if (indexSize == 1) {
 404         r300_shorten_ubyte_elts(r300, &indexBuffer, count);
 405         indexSize = 2;
 406     }
 407
 408     r300_upload_index_buffer(r300, &indexBuffer,
 409                              indexSize, start, count);
 410
 411     if (!r300_add_buffer(r300->rws, indexBuffer,
 412                          RADEON_GEM_DOMAIN_GTT, 0)) {
 413         goto cleanup;
 414     }
 415
 416     if (!r300->rws->validate(r300->rws)) {
 417         goto cleanup;
 418     }
 419
 420     u_upload_flush(r300->upload_vb);
 421     u_upload_flush(r300->upload_ib);
 422     r300_emit_dirty_state(r300);
 423
 424     r300_emit_aos(r300, 0);
 425
 426     if (alt_num_verts || count <= 65535) {
 427         r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex,
 428                                 maxIndex, mode, start, count);
 429     } else {
 430         do {
 431             short_count = MIN2(count, 65534);
 432             r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex,
 433                                     maxIndex, mode, start, short_count);
 434
 435             start += short_count;
 436             count -= short_count;
 437         } while (count);
 438     }
 439
 440 cleanup:
 441     if (indexBuffer != orgIndexBuffer) {
 442         pipe_buffer_reference( &indexBuffer, NULL );
 443     }
 444 }
 445
 446 /* Simple helpers for context setup. Should probably be moved to util. */
 447 void r300_draw_elements(struct pipe_context* pipe,
 448                         struct pipe_buffer* indexBuffer,
 449                         unsigned indexSize, unsigned mode,
 450                         unsigned start, unsigned count)
 451 {
 452    pipe->draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
 453                              mode, start, count);
 454 }
 455
 456 void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
 457                       unsigned start, unsigned count)
 458 {
 459     struct r300_context* r300 = r300_context(pipe);
 460 #if defined(ENABLE_ALT_NUM_VERTS)
 461     boolean alt_num_verts = r300_screen(pipe->screen)->caps->is_r500 &&
 462                             count > 65536;
 463 #else
 464     boolean alt_num_verts = FALSE;
 465 #endif
 466     unsigned short_count;
 467
 468     if (!u_trim_pipe_prim(mode, &count)) {
 469         return;
 470     }
 471
 472     r300_update_derived_state(r300);
 473
 474     r300_emit_buffer_validate(r300);
 475
 476     if (immd_is_good_idea(r300, count)) {
 477         r300_emit_draw_arrays_immediate(r300, mode, start, count);
 478     } else {
 479         if (!r300_setup_vertex_buffers(r300)) {
 480             return;
 481         }
 482
 483         u_upload_flush(r300->upload_vb);
 484         r300_emit_dirty_state(r300);
 485
 486         if (alt_num_verts || count <= 65535) {
 487             r300_emit_aos(r300, start);
 488             r300_emit_draw_arrays(r300, mode, count);
 489         } else {
 490             do {
 491                 short_count = MIN2(count, 65535);
 492                 r300_emit_aos(r300, start);
 493                 r300_emit_draw_arrays(r300, mode, short_count);
 494
 495                 start += short_count;
 496                 count -= short_count;
 497             } while (count);
 498         }
 499     }
 500 }
 501
 502 /****************************************************************************
 503  * The rest of this file is for SW TCL rendering only. Please be polite and *
 504  * keep these functions separated so that they are easier to locate. ~C.    *
 505  ***************************************************************************/
 506
 507 /* SW TCL arrays, using Draw. */
 508 void r300_swtcl_draw_arrays(struct pipe_context* pipe,
 509                                unsigned mode,
 510                                unsigned start,
 511                                unsigned count)
 512 {
 513     struct r300_context* r300 = r300_context(pipe);
 514     int i;
 515
 516     if (!u_trim_pipe_prim(mode, &count)) {
 517         return;
 518     }
 519
 520     for (i = 0; i < r300->vertex_buffer_count; i++) {
 521         void* buf = pipe_buffer_map(pipe->screen,
 522                                     r300->vertex_buffer[i].buffer,
 523                                     PIPE_BUFFER_USAGE_CPU_READ);
 524         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 525     }
 526
 527     draw_set_mapped_element_buffer(r300->draw, 0, NULL);
 528
 529     draw_set_mapped_constant_buffer(r300->draw,
 530                                     PIPE_SHADER_VERTEX,
 531                                     0,
 532                                     r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 533                                     r300->shader_constants[PIPE_SHADER_VERTEX].count *
 534                 (sizeof(float) * 4));
 535
 536     draw_arrays(r300->draw, mode, start, count);
 537
 538     for (i = 0; i < r300->vertex_buffer_count; i++) {
 539         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 540         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 541     }
 542 }
 543
 544 /* SW TCL elements, using Draw. */
 545 void r300_swtcl_draw_range_elements(struct pipe_context* pipe,
 546                                        struct pipe_buffer* indexBuffer,
 547                                        unsigned indexSize,
 548                                        unsigned minIndex,
 549                                        unsigned maxIndex,
 550                                        unsigned mode,
 551                                        unsigned start,
 552                                        unsigned count)
 553 {
 554     struct r300_context* r300 = r300_context(pipe);
 555     int i;
 556     void* indices;
 557
 558     if (!u_trim_pipe_prim(mode, &count)) {
 559         return;
 560     }
 561
 562     for (i = 0; i < r300->vertex_buffer_count; i++) {
 563         void* buf = pipe_buffer_map(pipe->screen,
 564                                     r300->vertex_buffer[i].buffer,
 565                                     PIPE_BUFFER_USAGE_CPU_READ);
 566         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 567     }
 568
 569     indices = pipe_buffer_map(pipe->screen, indexBuffer,
 570                               PIPE_BUFFER_USAGE_CPU_READ);
 571     draw_set_mapped_element_buffer_range(r300->draw, indexSize,
 572                                          minIndex, maxIndex, indices);
 573
 574     draw_set_mapped_constant_buffer(r300->draw,
 575                                     PIPE_SHADER_VERTEX,
 576                                     0,
 577             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 578             r300->shader_constants[PIPE_SHADER_VERTEX].count *
 579                 (sizeof(float) * 4));
 580
 581     draw_arrays(r300->draw, mode, start, count);
 582
 583     for (i = 0; i < r300->vertex_buffer_count; i++) {
 584         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 585         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 586     }
 587
 588     pipe_buffer_unmap(pipe->screen, indexBuffer);
 589     draw_set_mapped_element_buffer_range(r300->draw, 0, start,
 590                                          start + count - 1, NULL);
 591 }
 592
 593 /* Object for rendering using Draw. */
 594 struct r300_render {
 595     /* Parent class */
 596     struct vbuf_render base;
 597
 598     /* Pipe context */
 599     struct r300_context* r300;
 600
 601     /* Vertex information */
 602     size_t vertex_size;
 603     unsigned prim;
 604     unsigned hwprim;
 605
 606     /* VBO */
 607     struct pipe_buffer* vbo;
 608     size_t vbo_size;
 609     size_t vbo_offset;
 610     size_t vbo_max_used;
 611     void * vbo_ptr;
 612 };
 613
 614 static INLINE struct r300_render*
 615 r300_render(struct vbuf_render* render)
 616 {
 617     return (struct r300_render*)render;
 618 }
 619
 620 static const struct vertex_info*
 621 r300_render_get_vertex_info(struct vbuf_render* render)
 622 {
 623     struct r300_render* r300render = r300_render(render);
 624     struct r300_context* r300 = r300render->r300;
 625
 626     r300_update_derived_state(r300);
 627
 628     return (struct vertex_info*)r300->vertex_format_state.state;
 629 }
 630
 631 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
 632                                                    ushort vertex_size,
 633                                                    ushort count)
 634 {
 635     struct r300_render* r300render = r300_render(render);
 636     struct r300_context* r300 = r300render->r300;
 637     struct pipe_screen* screen = r300->context.screen;
 638     size_t size = (size_t)vertex_size * (size_t)count;
 639
 640     if (size + r300render->vbo_offset > r300render->vbo_size)
 641     {
 642         pipe_buffer_reference(&r300->vbo, NULL);
 643         r300render->vbo = pipe_buffer_create(screen,
 644                                              64,
 645                                              PIPE_BUFFER_USAGE_VERTEX,
 646                                              R300_MAX_VBO_SIZE);
 647         r300render->vbo_offset = 0;
 648         r300render->vbo_size = R300_MAX_VBO_SIZE;
 649     }
 650
 651     r300render->vertex_size = vertex_size;
 652     r300->vbo = r300render->vbo;
 653     r300->vbo_offset = r300render->vbo_offset;
 654
 655     return (r300render->vbo) ? TRUE : FALSE;
 656 }
 657
 658 static void* r300_render_map_vertices(struct vbuf_render* render)
 659 {
 660     struct r300_render* r300render = r300_render(render);
 661     struct pipe_screen* screen = r300render->r300->context.screen;
 662
 663     r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
 664                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 665
 666     return ((uint8_t*)r300render->vbo_ptr + r300render->vbo_offset);
 667 }
 668
 669 static void r300_render_unmap_vertices(struct vbuf_render* render,
 670                                              ushort min,
 671                                              ushort max)
 672 {
 673     struct r300_render* r300render = r300_render(render);
 674     struct pipe_screen* screen = r300render->r300->context.screen;
 675     CS_LOCALS(r300render->r300);
 676     BEGIN_CS(2);
 677     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 678     END_CS;
 679
 680     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 681                                     r300render->vertex_size * (max + 1));
 682     pipe_buffer_unmap(screen, r300render->vbo);
 683 }
 684
 685 static void r300_render_release_vertices(struct vbuf_render* render)
 686 {
 687     struct r300_render* r300render = r300_render(render);
 688
 689     r300render->vbo_offset += r300render->vbo_max_used;
 690     r300render->vbo_max_used = 0;
 691 }
 692
 693 static boolean r300_render_set_primitive(struct vbuf_render* render,
 694                                                unsigned prim)
 695 {
 696     struct r300_render* r300render = r300_render(render);
 697
 698     r300render->prim = prim;
 699     r300render->hwprim = r300_translate_primitive(prim);
 700
 701     return TRUE;
 702 }
 703
 704 static void r300_render_draw_arrays(struct vbuf_render* render,
 705                                           unsigned start,
 706                                           unsigned count)
 707 {
 708     struct r300_render* r300render = r300_render(render);
 709     struct r300_context* r300 = r300render->r300;
 710
 711     CS_LOCALS(r300);
 712
 713     r300_emit_dirty_state(r300);
 714
 715     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 716
 717     BEGIN_CS(2);
 718     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 719     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 720            r300render->hwprim);
 721     END_CS;
 722 }
 723
 724 static void r300_render_draw(struct vbuf_render* render,
 725                                    const ushort* indices,
 726                                    uint count)
 727 {
 728     struct r300_render* r300render = r300_render(render);
 729     struct r300_context* r300 = r300render->r300;
 730     int i;
 731
 732     CS_LOCALS(r300);
 733
 734     r300_emit_dirty_state(r300);
 735
 736     BEGIN_CS(2 + (count+1)/2);
 737     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 738     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 739            r300render->hwprim);
 740     for (i = 0; i < count-1; i += 2) {
 741         OUT_CS(indices[i+1] << 16 | indices[i]);
 742     }
 743     if (count % 2) {
 744         OUT_CS(indices[count-1]);
 745     }
 746     END_CS;
 747 }
 748
 749 static void r300_render_destroy(struct vbuf_render* render)
 750 {
 751     FREE(render);
 752 }
 753
 754 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 755 {
 756     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 757
 758     r300render->r300 = r300;
 759
 760     /* XXX find real numbers plz */
 761     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 762     r300render->base.max_indices = 16 * 1024;
 763
 764     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 765     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 766     r300render->base.map_vertices = r300_render_map_vertices;
 767     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 768     r300render->base.set_primitive = r300_render_set_primitive;
 769     r300render->base.draw = r300_render_draw;
 770     r300render->base.draw_arrays = r300_render_draw_arrays;
 771     r300render->base.release_vertices = r300_render_release_vertices;
 772     r300render->base.destroy = r300_render_destroy;
 773
 774     r300render->vbo = NULL;
 775     r300render->vbo_size = 0;
 776     r300render->vbo_offset = 0;
 777
 778     return &r300render->base;
 779 }
 780
 781 struct draw_stage* r300_draw_stage(struct r300_context* r300)
 782 {
 783     struct vbuf_render* render;
 784     struct draw_stage* stage;
 785
 786     render = r300_render_create(r300);
 787
 788     if (!render) {
 789         return NULL;
 790     }
 791
 792     stage = draw_vbuf_stage(r300->draw, render);
 793
 794     if (!stage) {
 795         render->destroy(render);
 796         return NULL;
 797     }
 798
 799     draw_set_render(r300->draw, render);
 800
 801     return stage;
 802 }