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 "pipe/p_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->vertex_element_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];
 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->vertex_element[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     BEGIN_CS(10 + count * vertex_size);
 172     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 173             r300_provoking_vertex_fixes(r300, mode));
 174     OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
 175     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 176     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 177     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, count * vertex_size);
 178     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (count << 16) |
 179             r300_translate_primitive(mode));
 180
 181     /* Emit vertices. */
 182     for (v = 0; v < count; v++) {
 183         for (i = 0; i < vertex_element_count; i++) {
 184             velem = &r300->vertex_element[i];
 185             vbi = velem->vertex_buffer_index;
 186             elem_offset = offset[i] + stride[vbi] * (v + start);
 187
 188             for (dw = 0; dw < size[i]; dw++) {
 189                 OUT_CS(map[vbi][elem_offset + dw]);
 190             }
 191         }
 192     }
 193     END_CS;
 194
 195     /* Unmap buffers. */
 196     for (i = 0; i < vertex_element_count; i++) {
 197         vbi = r300->vertex_element[i].vertex_buffer_index;
 198
 199         if (map[vbi]) {
 200             vbuf = &r300->vertex_buffer[vbi];
 201             pipe_buffer_unmap(r300->context.screen, vbuf->buffer);
 202             map[vbi] = NULL;
 203         }
 204     }
 205 }
 206
 207 static void r300_emit_draw_arrays(struct r300_context *r300,
 208                                   unsigned mode,
 209                                   unsigned count)
 210 {
 211     CS_LOCALS(r300);
 212
 213     BEGIN_CS(8);
 214     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 215             r300_provoking_vertex_fixes(r300, mode));
 216     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 217     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 218     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 219     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 220            r300_translate_primitive(mode));
 221     END_CS;
 222 }
 223
 224 static void r300_emit_draw_elements(struct r300_context *r300,
 225                                     struct pipe_buffer* indexBuffer,
 226                                     unsigned indexSize,
 227                                     unsigned minIndex,
 228                                     unsigned maxIndex,
 229                                     unsigned mode,
 230                                     unsigned start,
 231                                     unsigned count)
 232 {
 233     uint32_t count_dwords;
 234     uint32_t offset_dwords = indexSize * start / sizeof(uint32_t);
 235     CS_LOCALS(r300);
 236
 237     /* XXX most of these are stupid */
 238     assert(indexSize == 4 || indexSize == 2);
 239     assert((start * indexSize)  % 4 == 0);
 240     assert(offset_dwords == 0);
 241
 242     BEGIN_CS(14);
 243     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 244             r300_provoking_vertex_fixes(r300, mode));
 245     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, minIndex);
 246     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, maxIndex);
 247     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
 248     if (indexSize == 4) {
 249         count_dwords = count + start;
 250         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 251                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 252                r300_translate_primitive(mode));
 253     } else {
 254         count_dwords = (count + start + 1) / 2;
 255         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 256                r300_translate_primitive(mode));
 257     }
 258
 259     /* INDX_BUFFER is a truly special packet3.
 260      * Unlike most other packet3, where the offset is after the count,
 261      * the order is reversed, so the relocation ends up carrying the
 262      * size of the indexbuf instead of the offset.
 263      *
 264      * XXX Fix offset
 265      */
 266     OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
 267     OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
 268            (0 << R300_INDX_BUFFER_SKIP_SHIFT));
 269     OUT_CS(offset_dwords);
 270     OUT_CS_RELOC(indexBuffer, count_dwords,
 271         RADEON_GEM_DOMAIN_GTT, 0, 0);
 272
 273     END_CS;
 274 }
 275
 276 static boolean r300_setup_vertex_buffers(struct r300_context *r300)
 277 {
 278     struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
 279     struct pipe_vertex_element *velem = r300->vertex_element;
 280     struct pipe_buffer *pbuf;
 281
 282 validate:
 283     for (int i = 0; i < r300->vertex_element_count; i++) {
 284         pbuf = vbuf[velem[i].vertex_buffer_index].buffer;
 285
 286         if (!r300->winsys->add_buffer(r300->winsys, pbuf,
 287                                       RADEON_GEM_DOMAIN_GTT, 0)) {
 288             r300->context.flush(&r300->context, 0, NULL);
 289             goto validate;
 290         }
 291     }
 292
 293     if (!r300->winsys->validate(r300->winsys)) {
 294         r300->context.flush(&r300->context, 0, NULL);
 295         return r300->winsys->validate(r300->winsys);
 296     }
 297
 298     return TRUE;
 299 }
 300
 301 static void r300_shorten_ubyte_elts(struct r300_context* r300,
 302                                     struct pipe_buffer** elts,
 303                                     unsigned count)
 304 {
 305     struct pipe_screen* screen = r300->context.screen;
 306     struct pipe_buffer* new_elts;
 307     unsigned char *in_map;
 308     unsigned short *out_map;
 309     unsigned i;
 310
 311     new_elts = screen->buffer_create(screen, 32,
 312                                      PIPE_BUFFER_USAGE_INDEX |
 313                                      PIPE_BUFFER_USAGE_CPU_WRITE |
 314                                      PIPE_BUFFER_USAGE_GPU_READ,
 315                                      2 * count);
 316
 317     in_map = pipe_buffer_map(screen, *elts, PIPE_BUFFER_USAGE_CPU_READ);
 318     out_map = pipe_buffer_map(screen, new_elts, PIPE_BUFFER_USAGE_CPU_WRITE);
 319
 320     for (i = 0; i < count; i++) {
 321         *out_map = (unsigned short)*in_map;
 322         in_map++;
 323         out_map++;
 324     }
 325
 326     pipe_buffer_unmap(screen, *elts);
 327     pipe_buffer_unmap(screen, new_elts);
 328
 329     *elts = new_elts;
 330 }
 331
 332 /* This is the fast-path drawing & emission for HW TCL. */
 333 void r300_draw_range_elements(struct pipe_context* pipe,
 334                               struct pipe_buffer* indexBuffer,
 335                               unsigned indexSize,
 336                               unsigned minIndex,
 337                               unsigned maxIndex,
 338                               unsigned mode,
 339                               unsigned start,
 340                               unsigned count)
 341 {
 342     struct r300_context* r300 = r300_context(pipe);
 343     struct pipe_buffer* orgIndexBuffer = indexBuffer;
 344
 345     if (!u_trim_pipe_prim(mode, &count)) {
 346         return;
 347     }
 348
 349     if (count > 65535) {
 350        /* XXX: use aux/indices functions to split this into smaller
 351         * primitives.
 352         */
 353         return;
 354     }
 355
 356     r300_update_derived_state(r300);
 357
 358     r300_emit_buffer_validate(r300);
 359
 360     if (!r300_setup_vertex_buffers(r300)) {
 361         return;
 362     }
 363
 364     if (indexSize == 1) {
 365         r300_shorten_ubyte_elts(r300, &indexBuffer, count);
 366         indexSize = 2;
 367     }
 368
 369     if (!r300->winsys->add_buffer(r300->winsys, indexBuffer,
 370                                   RADEON_GEM_DOMAIN_GTT, 0)) {
 371         goto cleanup;
 372     }
 373
 374     if (!r300->winsys->validate(r300->winsys)) {
 375         goto cleanup;
 376     }
 377
 378     r300_emit_dirty_state(r300);
 379
 380     r300_emit_aos(r300, 0);
 381
 382     r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex, maxIndex,
 383                             mode, start, count);
 384
 385 cleanup:
 386     if (indexBuffer != orgIndexBuffer) {
 387         pipe->screen->buffer_destroy(indexBuffer);
 388     }
 389 }
 390
 391 /* Simple helpers for context setup. Should probably be moved to util. */
 392 void r300_draw_elements(struct pipe_context* pipe,
 393                         struct pipe_buffer* indexBuffer,
 394                         unsigned indexSize, unsigned mode,
 395                         unsigned start, unsigned count)
 396 {
 397    pipe->draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
 398                              mode, start, count);
 399 }
 400
 401 void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
 402                       unsigned start, unsigned count)
 403 {
 404     struct r300_context* r300 = r300_context(pipe);
 405
 406     if (!u_trim_pipe_prim(mode, &count)) {
 407         return;
 408     }
 409
 410     if (count > 65535) {
 411         /* XXX: driver needs to handle this -- use the functions in
 412          * aux/indices to split this into several smaller primitives.
 413          */
 414         return;
 415     }
 416
 417     r300_update_derived_state(r300);
 418
 419     r300_emit_buffer_validate(r300);
 420
 421     if (immd_is_good_idea(r300, count)) {
 422         r300_emit_dirty_state(r300);
 423         r300_emit_draw_arrays_immediate(r300, mode, start, count);
 424     } else {
 425         if (!r300_setup_vertex_buffers(r300)) {
 426             return;
 427         }
 428
 429         r300_emit_dirty_state(r300);
 430         r300_emit_aos(r300, start);
 431         r300_emit_draw_arrays(r300, mode, count);
 432     }
 433 }
 434
 435 /****************************************************************************
 436  * The rest of this file is for SW TCL rendering only. Please be polite and *
 437  * keep these functions separated so that they are easier to locate. ~C.    *
 438  ***************************************************************************/
 439
 440 /* SW TCL arrays, using Draw. */
 441 void r300_swtcl_draw_arrays(struct pipe_context* pipe,
 442                                unsigned mode,
 443                                unsigned start,
 444                                unsigned count)
 445 {
 446     struct r300_context* r300 = r300_context(pipe);
 447     int i;
 448
 449     if (!u_trim_pipe_prim(mode, &count)) {
 450         return;
 451     }
 452
 453     for (i = 0; i < r300->vertex_buffer_count; i++) {
 454         void* buf = pipe_buffer_map(pipe->screen,
 455                                     r300->vertex_buffer[i].buffer,
 456                                     PIPE_BUFFER_USAGE_CPU_READ);
 457         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 458     }
 459
 460     draw_set_mapped_element_buffer(r300->draw, 0, NULL);
 461
 462     draw_set_mapped_constant_buffer(r300->draw,
 463                                     PIPE_SHADER_VERTEX,
 464                                     r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 465                                     r300->shader_constants[PIPE_SHADER_VERTEX].count *
 466                 (sizeof(float) * 4));
 467
 468     draw_arrays(r300->draw, mode, start, count);
 469
 470     for (i = 0; i < r300->vertex_buffer_count; i++) {
 471         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 472         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 473     }
 474 }
 475
 476 /* SW TCL elements, using Draw. */
 477 void r300_swtcl_draw_range_elements(struct pipe_context* pipe,
 478                                        struct pipe_buffer* indexBuffer,
 479                                        unsigned indexSize,
 480                                        unsigned minIndex,
 481                                        unsigned maxIndex,
 482                                        unsigned mode,
 483                                        unsigned start,
 484                                        unsigned count)
 485 {
 486     struct r300_context* r300 = r300_context(pipe);
 487     int i;
 488     void* indices;
 489
 490     if (!u_trim_pipe_prim(mode, &count)) {
 491         return;
 492     }
 493
 494     for (i = 0; i < r300->vertex_buffer_count; i++) {
 495         void* buf = pipe_buffer_map(pipe->screen,
 496                                     r300->vertex_buffer[i].buffer,
 497                                     PIPE_BUFFER_USAGE_CPU_READ);
 498         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 499     }
 500
 501     indices = pipe_buffer_map(pipe->screen, indexBuffer,
 502                               PIPE_BUFFER_USAGE_CPU_READ);
 503     draw_set_mapped_element_buffer_range(r300->draw, indexSize,
 504                                          minIndex, maxIndex, indices);
 505
 506     draw_set_mapped_constant_buffer(r300->draw,
 507                                     PIPE_SHADER_VERTEX,
 508             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 509             r300->shader_constants[PIPE_SHADER_VERTEX].count *
 510                 (sizeof(float) * 4));
 511
 512     draw_arrays(r300->draw, mode, start, count);
 513
 514     for (i = 0; i < r300->vertex_buffer_count; i++) {
 515         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 516         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 517     }
 518
 519     pipe_buffer_unmap(pipe->screen, indexBuffer);
 520     draw_set_mapped_element_buffer_range(r300->draw, 0, start,
 521                                          start + count - 1, NULL);
 522 }
 523
 524 /* Object for rendering using Draw. */
 525 struct r300_render {
 526     /* Parent class */
 527     struct vbuf_render base;
 528
 529     /* Pipe context */
 530     struct r300_context* r300;
 531
 532     /* Vertex information */
 533     size_t vertex_size;
 534     unsigned prim;
 535     unsigned hwprim;
 536
 537     /* VBO */
 538     struct pipe_buffer* vbo;
 539     size_t vbo_size;
 540     size_t vbo_offset;
 541     size_t vbo_max_used;
 542     void * vbo_ptr;
 543 };
 544
 545 static INLINE struct r300_render*
 546 r300_render(struct vbuf_render* render)
 547 {
 548     return (struct r300_render*)render;
 549 }
 550
 551 static const struct vertex_info*
 552 r300_render_get_vertex_info(struct vbuf_render* render)
 553 {
 554     struct r300_render* r300render = r300_render(render);
 555     struct r300_context* r300 = r300render->r300;
 556
 557     r300_update_derived_state(r300);
 558
 559     return &r300->vertex_info->vinfo;
 560 }
 561
 562 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
 563                                                    ushort vertex_size,
 564                                                    ushort count)
 565 {
 566     struct r300_render* r300render = r300_render(render);
 567     struct r300_context* r300 = r300render->r300;
 568     struct pipe_screen* screen = r300->context.screen;
 569     size_t size = (size_t)vertex_size * (size_t)count;
 570
 571     if (size + r300render->vbo_offset > r300render->vbo_size)
 572     {
 573         pipe_buffer_reference(&r300->vbo, NULL);
 574         r300render->vbo = pipe_buffer_create(screen,
 575                                              64,
 576                                              PIPE_BUFFER_USAGE_VERTEX,
 577                                              R300_MAX_VBO_SIZE);
 578         r300render->vbo_offset = 0;
 579         r300render->vbo_size = R300_MAX_VBO_SIZE;
 580     }
 581
 582     r300render->vertex_size = vertex_size;
 583     r300->vbo = r300render->vbo;
 584     r300->vbo_offset = r300render->vbo_offset;
 585
 586     return (r300render->vbo) ? TRUE : FALSE;
 587 }
 588
 589 static void* r300_render_map_vertices(struct vbuf_render* render)
 590 {
 591     struct r300_render* r300render = r300_render(render);
 592     struct pipe_screen* screen = r300render->r300->context.screen;
 593
 594     r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
 595                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 596
 597     return ((uint8_t*)r300render->vbo_ptr + r300render->vbo_offset);
 598 }
 599
 600 static void r300_render_unmap_vertices(struct vbuf_render* render,
 601                                              ushort min,
 602                                              ushort max)
 603 {
 604     struct r300_render* r300render = r300_render(render);
 605     struct pipe_screen* screen = r300render->r300->context.screen;
 606     CS_LOCALS(r300render->r300);
 607     BEGIN_CS(2);
 608     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 609     END_CS;
 610
 611     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 612                                     r300render->vertex_size * (max + 1));
 613     pipe_buffer_unmap(screen, r300render->vbo);
 614 }
 615
 616 static void r300_render_release_vertices(struct vbuf_render* render)
 617 {
 618     struct r300_render* r300render = r300_render(render);
 619
 620     r300render->vbo_offset += r300render->vbo_max_used;
 621     r300render->vbo_max_used = 0;
 622 }
 623
 624 static boolean r300_render_set_primitive(struct vbuf_render* render,
 625                                                unsigned prim)
 626 {
 627     struct r300_render* r300render = r300_render(render);
 628
 629     r300render->prim = prim;
 630     r300render->hwprim = r300_translate_primitive(prim);
 631
 632     return TRUE;
 633 }
 634
 635 static void r300_render_draw_arrays(struct vbuf_render* render,
 636                                           unsigned start,
 637                                           unsigned count)
 638 {
 639     struct r300_render* r300render = r300_render(render);
 640     struct r300_context* r300 = r300render->r300;
 641
 642     CS_LOCALS(r300);
 643
 644     r300_emit_dirty_state(r300);
 645
 646     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 647
 648     BEGIN_CS(2);
 649     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 650     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 651            r300render->hwprim);
 652     END_CS;
 653 }
 654
 655 static void r300_render_draw(struct vbuf_render* render,
 656                                    const ushort* indices,
 657                                    uint count)
 658 {
 659     struct r300_render* r300render = r300_render(render);
 660     struct r300_context* r300 = r300render->r300;
 661     int i;
 662
 663     CS_LOCALS(r300);
 664
 665     r300_emit_dirty_state(r300);
 666
 667     BEGIN_CS(2 + (count+1)/2);
 668     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 669     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 670            r300render->hwprim);
 671     for (i = 0; i < count-1; i += 2) {
 672         OUT_CS(indices[i+1] << 16 | indices[i]);
 673     }
 674     if (count % 2) {
 675         OUT_CS(indices[count-1]);
 676     }
 677     END_CS;
 678 }
 679
 680 static void r300_render_destroy(struct vbuf_render* render)
 681 {
 682     FREE(render);
 683 }
 684
 685 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 686 {
 687     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 688
 689     r300render->r300 = r300;
 690
 691     /* XXX find real numbers plz */
 692     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 693     r300render->base.max_indices = 16 * 1024;
 694
 695     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 696     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 697     r300render->base.map_vertices = r300_render_map_vertices;
 698     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 699     r300render->base.set_primitive = r300_render_set_primitive;
 700     r300render->base.draw = r300_render_draw;
 701     r300render->base.draw_arrays = r300_render_draw_arrays;
 702     r300render->base.release_vertices = r300_render_release_vertices;
 703     r300render->base.destroy = r300_render_destroy;
 704
 705     r300render->vbo = NULL;
 706     r300render->vbo_size = 0;
 707     r300render->vbo_offset = 0;
 708
 709     return &r300render->base;
 710 }
 711
 712 struct draw_stage* r300_draw_stage(struct r300_context* r300)
 713 {
 714     struct vbuf_render* render;
 715     struct draw_stage* stage;
 716
 717     render = r300_render_create(r300);
 718
 719     if (!render) {
 720         return NULL;
 721     }
 722
 723     stage = draw_vbuf_stage(r300->draw, render);
 724
 725     if (!stage) {
 726         render->destroy(render);
 727         return NULL;
 728     }
 729
 730     draw_set_render(r300->draw, render);
 731
 732     return stage;
 733 }