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 static uint32_t r300_translate_primitive(unsigned prim)
  45 {
  46     switch (prim) {
  47         case PIPE_PRIM_POINTS:
  48             return R300_VAP_VF_CNTL__PRIM_POINTS;
  49         case PIPE_PRIM_LINES:
  50             return R300_VAP_VF_CNTL__PRIM_LINES;
  51         case PIPE_PRIM_LINE_LOOP:
  52             return R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
  53         case PIPE_PRIM_LINE_STRIP:
  54             return R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
  55         case PIPE_PRIM_TRIANGLES:
  56             return R300_VAP_VF_CNTL__PRIM_TRIANGLES;
  57         case PIPE_PRIM_TRIANGLE_STRIP:
  58             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
  59         case PIPE_PRIM_TRIANGLE_FAN:
  60             return R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
  61         case PIPE_PRIM_QUADS:
  62             return R300_VAP_VF_CNTL__PRIM_QUADS;
  63         case PIPE_PRIM_QUAD_STRIP:
  64             return R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
  65         case PIPE_PRIM_POLYGON:
  66             return R300_VAP_VF_CNTL__PRIM_POLYGON;
  67         default:
  68             return 0;
  69     }
  70 }
  71
  72 static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
  73                                             unsigned mode)
  74 {
  75     struct r300_rs_state* rs = (struct r300_rs_state*)r300->rs_state.state;
  76     uint32_t color_control = rs->color_control;
  77
  78     /* By default (see r300_state.c:r300_create_rs_state) color_control is
  79      * initialized to provoking the first vertex.
  80      *
  81      * Triangle fans must be reduced to the second vertex, not the first, in
  82      * Gallium flatshade-first mode, as per the GL spec.
  83      * (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt)
  84      *
  85      * Quads never provoke correctly in flatshade-first mode. The first
  86      * vertex is never considered as provoking, so only the second, third,
  87      * and fourth vertices can be selected, and both "third" and "last" modes
  88      * select the fourth vertex. This is probably due to D3D lacking quads.
  89      *
  90      * Similarly, polygons reduce to the first, not the last, vertex, when in
  91      * "last" mode, and all other modes start from the second vertex.
  92      *
  93      * ~ C.
  94      */
  95
  96     if (rs->rs.flatshade_first) {
  97         switch (mode) {
  98             case PIPE_PRIM_TRIANGLE_FAN:
  99                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND;
 100                 break;
 101             case PIPE_PRIM_QUADS:
 102             case PIPE_PRIM_QUAD_STRIP:
 103             case PIPE_PRIM_POLYGON:
 104                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 105                 break;
 106             default:
 107                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST;
 108                 break;
 109         }
 110     } else {
 111         color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 112     }
 113
 114     return color_control;
 115 }
 116
 117 /* Check if the requested number of dwords is available in the CS and
 118  * if not, flush. Return TRUE if the flush occured. */
 119 static boolean r300_reserve_cs_space(struct r300_context *r300,
 120                                      unsigned dwords)
 121 {
 122     if (!r300->rws->check_cs(r300->rws, dwords)) {
 123         r300->context.flush(&r300->context, 0, NULL);
 124         return TRUE;
 125     }
 126     return FALSE;
 127 }
 128
 129 static boolean immd_is_good_idea(struct r300_context *r300,
 130                                  unsigned count)
 131 {
 132     struct pipe_vertex_element* velem;
 133     struct pipe_vertex_buffer* vbuf;
 134     boolean checked[PIPE_MAX_ATTRIBS] = {0};
 135     unsigned vertex_element_count = r300->velems->count;
 136     unsigned i, vbi;
 137
 138     if (count > 10 || DBG_ON(r300, DBG_NO_IMMD)) {
 139         return FALSE;
 140     }
 141
 142     /* We shouldn't map buffers referenced by CS, busy buffers,
 143      * and ones placed in VRAM. */
 144     /* XXX Check for VRAM buffers. */
 145     for (i = 0; i < vertex_element_count; i++) {
 146         velem = &r300->velems->velem[i];
 147         vbi = velem->vertex_buffer_index;
 148
 149         if (!checked[vbi]) {
 150             vbuf = &r300->vertex_buffer[vbi];
 151
 152             if (r300_buffer_is_referenced(&r300->context,
 153                                           vbuf->buffer,
 154                                           R300_REF_CS | R300_REF_HW)) {
 155                 /* It's a very bad idea to map it... */
 156                 return FALSE;
 157             }
 158             checked[vbi] = TRUE;
 159         }
 160     }
 161     return TRUE;
 162 }
 163
 164 /*****************************************************************************
 165  * The emission of draw packets for r500. Older GPUs may use these functions *
 166  * after resolving fallback issues (e.g. stencil ref two-sided).             *
 167  ****************************************************************************/
 168
 169 static boolean r500_emit_index_offset(struct r300_context *r300, int indexBias)
 170 {
 171     CS_LOCALS(r300);
 172
 173     if (r300->screen->caps.is_r500 &&
 174         r300->rws->get_value(r300->rws, R300_VID_DRM_2_3_0)) {
 175         BEGIN_CS(2);
 176         OUT_CS_REG(R500_VAP_INDEX_OFFSET,
 177                    (indexBias & 0xFFFFFF) | (indexBias < 0 ? 1<<24 : 0));
 178         END_CS;
 179     } else {
 180         if (indexBias)
 181             return FALSE; /* Can't do anything :( */
 182     }
 183
 184     return TRUE;
 185 }
 186
 187 void r500_emit_draw_arrays_immediate(struct r300_context *r300,
 188                                      unsigned mode,
 189                                      unsigned start,
 190                                      unsigned count)
 191 {
 192     struct pipe_vertex_element* velem;
 193     struct pipe_vertex_buffer* vbuf;
 194     unsigned vertex_element_count = r300->velems->count;
 195     unsigned i, v, vbi, dw, elem_offset, dwords;
 196
 197     /* Size of the vertex, in dwords. */
 198     unsigned vertex_size = 0;
 199
 200     /* Offsets of the attribute, in dwords, from the start of the vertex. */
 201     unsigned offset[PIPE_MAX_ATTRIBS];
 202
 203     /* Size of the vertex element, in dwords. */
 204     unsigned size[PIPE_MAX_ATTRIBS];
 205
 206     /* Stride to the same attrib in the next vertex in the vertex buffer,
 207      * in dwords. */
 208     unsigned stride[PIPE_MAX_ATTRIBS] = {0};
 209
 210     /* Mapped vertex buffers. */
 211     uint32_t* map[PIPE_MAX_ATTRIBS] = {0};
 212     struct pipe_transfer* transfer[PIPE_MAX_ATTRIBS] = {NULL};
 213
 214     CS_LOCALS(r300);
 215
 216     /* Calculate the vertex size, offsets, strides etc. and map the buffers. */
 217     for (i = 0; i < vertex_element_count; i++) {
 218         velem = &r300->velems->velem[i];
 219         offset[i] = velem->src_offset / 4;
 220         size[i] = util_format_get_blocksize(velem->src_format) / 4;
 221         vertex_size += size[i];
 222         vbi = velem->vertex_buffer_index;
 223
 224         /* Map the buffer. */
 225         if (!map[vbi]) {
 226             vbuf = &r300->vertex_buffer[vbi];
 227             map[vbi] = (uint32_t*)pipe_buffer_map(&r300->context,
 228                                                   vbuf->buffer,
 229                                                   PIPE_TRANSFER_READ,
 230                                                   &transfer[vbi]);
 231             map[vbi] += vbuf->buffer_offset / 4;
 232             stride[vbi] = vbuf->stride / 4;
 233         }
 234     }
 235
 236     dwords = 9 + count * vertex_size;
 237
 238     r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + dwords);
 239     r300_emit_buffer_validate(r300, FALSE, NULL);
 240     r300_emit_dirty_state(r300);
 241
 242     r500_emit_index_offset(r300, 0);
 243
 244     BEGIN_CS(dwords);
 245     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 246             r300_provoking_vertex_fixes(r300, mode));
 247     OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
 248     OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2);
 249     OUT_CS(count - 1);
 250     OUT_CS(0);
 251     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, count * vertex_size);
 252     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (count << 16) |
 253             r300_translate_primitive(mode));
 254
 255     /* Emit vertices. */
 256     for (v = 0; v < count; v++) {
 257         for (i = 0; i < vertex_element_count; i++) {
 258             velem = &r300->velems->velem[i];
 259             vbi = velem->vertex_buffer_index;
 260             elem_offset = offset[i] + stride[vbi] * (v + start);
 261
 262             for (dw = 0; dw < size[i]; dw++) {
 263                 OUT_CS(map[vbi][elem_offset + dw]);
 264             }
 265         }
 266     }
 267     END_CS;
 268
 269     /* Unmap buffers. */
 270     for (i = 0; i < vertex_element_count; i++) {
 271         vbi = r300->velems->velem[i].vertex_buffer_index;
 272
 273         if (map[vbi]) {
 274             vbuf = &r300->vertex_buffer[vbi];
 275             pipe_buffer_unmap(&r300->context, vbuf->buffer, transfer[vbi]);
 276             map[vbi] = NULL;
 277         }
 278     }
 279 }
 280
 281 void r500_emit_draw_arrays(struct r300_context *r300,
 282                            unsigned mode,
 283                            unsigned count)
 284 {
 285     boolean alt_num_verts = count > 65535;
 286     CS_LOCALS(r300);
 287
 288     if (count >= (1 << 24)) {
 289         fprintf(stderr, "r300: Got a huge number of vertices: %i, "
 290                 "refusing to render.\n", count);
 291         return;
 292     }
 293
 294     r500_emit_index_offset(r300, 0);
 295
 296     BEGIN_CS(7 + (alt_num_verts ? 2 : 0));
 297     if (alt_num_verts) {
 298         OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
 299     }
 300     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 301             r300_provoking_vertex_fixes(r300, mode));
 302     OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2);
 303     OUT_CS(count - 1);
 304     OUT_CS(0);
 305     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 306     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 307            r300_translate_primitive(mode) |
 308            (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 309     END_CS;
 310 }
 311
 312 void r500_emit_draw_elements(struct r300_context *r300,
 313                              struct pipe_resource* indexBuffer,
 314                              unsigned indexSize,
 315                              int indexBias,
 316                              unsigned minIndex,
 317                              unsigned maxIndex,
 318                              unsigned mode,
 319                              unsigned start,
 320                              unsigned count)
 321 {
 322     uint32_t count_dwords;
 323     uint32_t offset_dwords = indexSize * start / sizeof(uint32_t);
 324     boolean alt_num_verts = count > 65535;
 325     CS_LOCALS(r300);
 326
 327     if (count >= (1 << 24)) {
 328         fprintf(stderr, "r300: Got a huge number of vertices: %i, "
 329                 "refusing to render.\n", count);
 330         return;
 331     }
 332
 333     maxIndex = MIN2(maxIndex, r300->vertex_buffer_max_index);
 334
 335     DBG(r300, DBG_DRAW, "r300: Indexbuf of %u indices, min %u max %u\n",
 336         count, minIndex, maxIndex);
 337
 338     if (!r500_emit_index_offset(r300, indexBias)) {
 339         fprintf(stderr, "r300: Got a non-zero index bias, "
 340                 "refusing to render.\n");
 341         return;
 342     }
 343
 344     BEGIN_CS(13 + (alt_num_verts ? 2 : 0));
 345     if (alt_num_verts) {
 346         OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
 347     }
 348     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 349             r300_provoking_vertex_fixes(r300, mode));
 350     OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2);
 351     OUT_CS(maxIndex);
 352     OUT_CS(minIndex);
 353     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
 354     if (indexSize == 4) {
 355         count_dwords = count;
 356         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 357                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 358                r300_translate_primitive(mode) |
 359                (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 360     } else {
 361         count_dwords = (count + 1) / 2;
 362         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 363                r300_translate_primitive(mode) |
 364                (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 365     }
 366
 367     /* INDX_BUFFER is a truly special packet3.
 368      * Unlike most other packet3, where the offset is after the count,
 369      * the order is reversed, so the relocation ends up carrying the
 370      * size of the indexbuf instead of the offset.
 371      */
 372     OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
 373     OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
 374            (0 << R300_INDX_BUFFER_SKIP_SHIFT));
 375     OUT_CS(offset_dwords << 2);
 376     OUT_CS_BUF_RELOC(indexBuffer, count_dwords,
 377                      RADEON_GEM_DOMAIN_GTT, 0, 0);
 378
 379     END_CS;
 380 }
 381
 382 /*****************************************************************************
 383  * The emission of draw packets for r300 which take care of the two-sided    *
 384  * stencil ref fallback and call r500's functions.                           *
 385  ****************************************************************************/
 386
 387 /* Set drawing for front faces. */
 388 static void r300_begin_stencil_ref_fallback(struct r300_context *r300)
 389 {
 390     struct r300_rs_state *rs = (struct r300_rs_state*)r300->rs_state.state;
 391     CS_LOCALS(r300);
 392
 393     BEGIN_CS(2);
 394     OUT_CS_REG(R300_SU_CULL_MODE, rs->cull_mode | R300_CULL_BACK);
 395     END_CS;
 396 }
 397
 398 /* Set drawing for back faces. */
 399 static void r300_switch_stencil_ref_side(struct r300_context *r300)
 400 {
 401     struct r300_rs_state *rs = (struct r300_rs_state*)r300->rs_state.state;
 402     struct r300_dsa_state *dsa = (struct r300_dsa_state*)r300->dsa_state.state;
 403     CS_LOCALS(r300);
 404
 405     BEGIN_CS(4);
 406     OUT_CS_REG(R300_SU_CULL_MODE, rs->cull_mode | R300_CULL_FRONT);
 407     OUT_CS_REG(R300_ZB_STENCILREFMASK,
 408                dsa->stencil_ref_bf | r300->stencil_ref.ref_value[1]);
 409     END_CS;
 410 }
 411
 412 /* Restore the original state. */
 413 static void r300_end_stencil_ref_fallback(struct r300_context *r300)
 414 {
 415     struct r300_rs_state *rs = (struct r300_rs_state*)r300->rs_state.state;
 416     struct r300_dsa_state *dsa = (struct r300_dsa_state*)r300->dsa_state.state;
 417     CS_LOCALS(r300);
 418
 419     BEGIN_CS(4);
 420     OUT_CS_REG(R300_SU_CULL_MODE, rs->cull_mode);
 421     OUT_CS_REG(R300_ZB_STENCILREFMASK,
 422                dsa->stencil_ref_mask | r300->stencil_ref.ref_value[0]);
 423     END_CS;
 424 }
 425
 426 void r300_emit_draw_arrays_immediate(struct r300_context *r300,
 427                                      unsigned mode,
 428                                      unsigned start,
 429                                      unsigned count)
 430 {
 431     if (!r300->stencil_ref_bf_fallback) {
 432         r500_emit_draw_arrays_immediate(r300, mode, start, count);
 433     } else {
 434         r300_begin_stencil_ref_fallback(r300);
 435         r500_emit_draw_arrays_immediate(r300, mode, start, count);
 436         r300_switch_stencil_ref_side(r300);
 437         r500_emit_draw_arrays_immediate(r300, mode, start, count);
 438         r300_end_stencil_ref_fallback(r300);
 439     }
 440 }
 441
 442 void r300_emit_draw_arrays(struct r300_context *r300,
 443                            unsigned mode,
 444                            unsigned count)
 445 {
 446     if (!r300->stencil_ref_bf_fallback) {
 447         r500_emit_draw_arrays(r300, mode, count);
 448     } else {
 449         r300_begin_stencil_ref_fallback(r300);
 450         r500_emit_draw_arrays(r300, mode, count);
 451         r300_switch_stencil_ref_side(r300);
 452         r500_emit_draw_arrays(r300, mode, count);
 453         r300_end_stencil_ref_fallback(r300);
 454     }
 455 }
 456
 457 void r300_emit_draw_elements(struct r300_context *r300,
 458                              struct pipe_resource* indexBuffer,
 459                              unsigned indexSize,
 460                              int indexBias,
 461                              unsigned minIndex,
 462                              unsigned maxIndex,
 463                              unsigned mode,
 464                              unsigned start,
 465                              unsigned count)
 466 {
 467     if (!r300->stencil_ref_bf_fallback) {
 468         r500_emit_draw_elements(r300, indexBuffer, indexSize, indexBias,
 469                                 minIndex, maxIndex, mode, start, count);
 470     } else {
 471         r300_begin_stencil_ref_fallback(r300);
 472         r500_emit_draw_elements(r300, indexBuffer, indexSize, indexBias,
 473                                 minIndex, maxIndex, mode, start, count);
 474         r300_switch_stencil_ref_side(r300);
 475         r500_emit_draw_elements(r300, indexBuffer, indexSize, indexBias,
 476                                 minIndex, maxIndex, mode, start, count);
 477         r300_end_stencil_ref_fallback(r300);
 478     }
 479 }
 480
 481 static void r300_shorten_ubyte_elts(struct r300_context* r300,
 482                                     struct pipe_resource** elts,
 483                                     unsigned start,
 484                                     unsigned count)
 485 {
 486     struct pipe_context* context = &r300->context;
 487     struct pipe_screen* screen = r300->context.screen;
 488     struct pipe_resource* new_elts;
 489     unsigned char *in_map;
 490     unsigned short *out_map;
 491     struct pipe_transfer *src_transfer, *dst_transfer;
 492     unsigned i;
 493
 494     new_elts = pipe_buffer_create(screen,
 495                                   PIPE_BIND_INDEX_BUFFER,
 496                                   2 * count);
 497
 498     in_map = pipe_buffer_map(context, *elts, PIPE_TRANSFER_READ, &src_transfer);
 499     out_map = pipe_buffer_map(context, new_elts, PIPE_TRANSFER_WRITE, &dst_transfer);
 500
 501     in_map += start;
 502
 503     for (i = 0; i < count; i++) {
 504         *out_map = (unsigned short)*in_map;
 505         in_map++;
 506         out_map++;
 507     }
 508
 509     pipe_buffer_unmap(context, *elts, src_transfer);
 510     pipe_buffer_unmap(context, new_elts, dst_transfer);
 511
 512     *elts = new_elts;
 513 }
 514
 515 static void r300_align_ushort_elts(struct r300_context *r300,
 516                                    struct pipe_resource **elts,
 517                                    unsigned start, unsigned count)
 518 {
 519     struct pipe_context* context = &r300->context;
 520     struct pipe_transfer *in_transfer = NULL;
 521     struct pipe_transfer *out_transfer = NULL;
 522     struct pipe_resource* new_elts;
 523     unsigned short *in_map;
 524     unsigned short *out_map;
 525
 526     new_elts = pipe_buffer_create(context->screen,
 527                                   PIPE_BIND_INDEX_BUFFER,
 528                                   2 * count);
 529
 530     in_map = pipe_buffer_map(context, *elts,
 531                              PIPE_TRANSFER_READ, &in_transfer);
 532     out_map = pipe_buffer_map(context, new_elts,
 533                               PIPE_TRANSFER_WRITE, &out_transfer);
 534
 535     memcpy(out_map, in_map+start, 2 * count);
 536
 537     pipe_buffer_unmap(context, *elts, in_transfer);
 538     pipe_buffer_unmap(context, new_elts, out_transfer);
 539
 540     *elts = new_elts;
 541 }
 542
 543 /* This is the fast-path drawing & emission for HW TCL. */
 544 void r300_draw_range_elements(struct pipe_context* pipe,
 545                               struct pipe_resource* indexBuffer,
 546                               unsigned indexSize,
 547                               int indexBias,
 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     struct pipe_resource* orgIndexBuffer = indexBuffer;
 556     boolean alt_num_verts = r300->screen->caps.is_r500 &&
 557                             count > 65536 &&
 558                             r300->rws->get_value(r300->rws, R300_VID_DRM_2_3_0);
 559     unsigned short_count;
 560
 561     if (r300->skip_rendering) {
 562         return;
 563     }
 564
 565     if (!u_trim_pipe_prim(mode, &count)) {
 566         return;
 567     }
 568
 569     if (indexSize == 1) {
 570         r300_shorten_ubyte_elts(r300, &indexBuffer, start, count);
 571         indexSize = 2;
 572         start = 0;
 573     } else if (indexSize == 2 && start % 2 != 0) {
 574         r300_align_ushort_elts(r300, &indexBuffer, start, count);
 575         start = 0;
 576     }
 577
 578     r300_update_derived_state(r300);
 579
 580     r300_upload_index_buffer(r300, &indexBuffer, indexSize, start, count);
 581
 582     /* 128 dwords for emit_aos and emit_draw_elements */
 583     r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + 128);
 584     r300_emit_buffer_validate(r300, TRUE, indexBuffer);
 585     r300_emit_dirty_state(r300);
 586     r300_emit_aos(r300, 0, TRUE);
 587
 588     u_upload_flush(r300->upload_vb);
 589     u_upload_flush(r300->upload_ib);
 590     if (alt_num_verts || count <= 65535) {
 591         r300->emit_draw_elements(r300, indexBuffer, indexSize, indexBias,
 592                                  minIndex, maxIndex, mode, start, count);
 593     } else {
 594         do {
 595             short_count = MIN2(count, 65534);
 596             r300->emit_draw_elements(r300, indexBuffer, indexSize, indexBias,
 597                                      minIndex, maxIndex,
 598                                      mode, start, short_count);
 599
 600             start += short_count;
 601             count -= short_count;
 602
 603             /* 16 spare dwords are enough for emit_draw_elements. */
 604             if (count && r300_reserve_cs_space(r300, 16)) {
 605                 r300_emit_buffer_validate(r300, TRUE, indexBuffer);
 606                 r300_emit_dirty_state(r300);
 607                 r300_emit_aos(r300, 0, TRUE);
 608             }
 609         } while (count);
 610     }
 611
 612     if (indexBuffer != orgIndexBuffer) {
 613         pipe_resource_reference( &indexBuffer, NULL );
 614     }
 615 }
 616
 617 /* Simple helpers for context setup. Should probably be moved to util. */
 618 void r300_draw_elements(struct pipe_context* pipe,
 619                         struct pipe_resource* indexBuffer,
 620                         unsigned indexSize, int indexBias, unsigned mode,
 621                         unsigned start, unsigned count)
 622 {
 623     struct r300_context *r300 = r300_context(pipe);
 624
 625     pipe->draw_range_elements(pipe, indexBuffer, indexSize, indexBias,
 626                               0, r300->vertex_buffer_max_index,
 627                               mode, start, count);
 628 }
 629
 630 void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
 631                       unsigned start, unsigned count)
 632 {
 633     struct r300_context* r300 = r300_context(pipe);
 634     boolean alt_num_verts = r300->screen->caps.is_r500 &&
 635                             count > 65536 &&
 636                             r300->rws->get_value(r300->rws, R300_VID_DRM_2_3_0);
 637     unsigned short_count;
 638
 639     if (r300->skip_rendering) {
 640         return;
 641     }
 642
 643     if (!u_trim_pipe_prim(mode, &count)) {
 644         return;
 645     }
 646
 647     r300_update_derived_state(r300);
 648
 649     if (immd_is_good_idea(r300, count)) {
 650         r300->emit_draw_arrays_immediate(r300, mode, start, count);
 651     } else {
 652         /* Make sure there are at least 128 spare dwords in the command buffer.
 653          * (most of it being consumed by emit_aos) */
 654         r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + 128);
 655         r300_emit_buffer_validate(r300, TRUE, NULL);
 656         r300_emit_dirty_state(r300);
 657
 658         if (alt_num_verts || count <= 65535) {
 659             r300_emit_aos(r300, start, FALSE);
 660             r300->emit_draw_arrays(r300, mode, count);
 661         } else {
 662             do {
 663                 short_count = MIN2(count, 65535);
 664                 r300_emit_aos(r300, start, FALSE);
 665                 r300->emit_draw_arrays(r300, mode, short_count);
 666
 667                 start += short_count;
 668                 count -= short_count;
 669
 670                 /* Again, we emit both AOS and draw_arrays so there should be
 671                  * at least 128 spare dwords. */
 672                 if (count && r300_reserve_cs_space(r300, 128)) {
 673                     r300_emit_buffer_validate(r300, TRUE, NULL);
 674                     r300_emit_dirty_state(r300);
 675                 }
 676             } while (count);
 677         }
 678         u_upload_flush(r300->upload_vb);
 679     }
 680 }
 681
 682 /****************************************************************************
 683  * The rest of this file is for SW TCL rendering only. Please be polite and *
 684  * keep these functions separated so that they are easier to locate. ~C.    *
 685  ***************************************************************************/
 686
 687 /* SW TCL arrays, using Draw. */
 688 void r300_swtcl_draw_arrays(struct pipe_context* pipe,
 689                                unsigned mode,
 690                                unsigned start,
 691                                unsigned count)
 692 {
 693     struct r300_context* r300 = r300_context(pipe);
 694     struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS];
 695     int i;
 696
 697     if (r300->skip_rendering) {
 698         return;
 699     }
 700
 701     if (!u_trim_pipe_prim(mode, &count)) {
 702         return;
 703     }
 704
 705     for (i = 0; i < r300->vertex_buffer_count; i++) {
 706         void* buf = pipe_buffer_map(pipe,
 707                                     r300->vertex_buffer[i].buffer,
 708                                     PIPE_TRANSFER_READ,
 709                                     &vb_transfer[i]);
 710         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 711     }
 712
 713     draw_set_mapped_element_buffer(r300->draw, 0, 0, NULL);
 714
 715     draw_arrays(r300->draw, mode, start, count);
 716
 717     for (i = 0; i < r300->vertex_buffer_count; i++) {
 718         pipe_buffer_unmap(pipe, r300->vertex_buffer[i].buffer,
 719                           vb_transfer[i]);
 720         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 721     }
 722 }
 723
 724 /* SW TCL elements, using Draw. */
 725 void r300_swtcl_draw_range_elements(struct pipe_context* pipe,
 726                                        struct pipe_resource* indexBuffer,
 727                                        unsigned indexSize,
 728                                        int indexBias,
 729                                        unsigned minIndex,
 730                                        unsigned maxIndex,
 731                                        unsigned mode,
 732                                        unsigned start,
 733                                        unsigned count)
 734 {
 735     struct r300_context* r300 = r300_context(pipe);
 736     struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS];
 737     struct pipe_transfer *ib_transfer;
 738     int i;
 739     void* indices;
 740
 741     if (r300->skip_rendering) {
 742         return;
 743     }
 744
 745     if (!u_trim_pipe_prim(mode, &count)) {
 746         return;
 747     }
 748
 749     for (i = 0; i < r300->vertex_buffer_count; i++) {
 750         void* buf = pipe_buffer_map(pipe,
 751                                     r300->vertex_buffer[i].buffer,
 752                                     PIPE_TRANSFER_READ,
 753                                     &vb_transfer[i]);
 754         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 755     }
 756
 757     indices = pipe_buffer_map(pipe, indexBuffer,
 758                               PIPE_TRANSFER_READ, &ib_transfer);
 759     draw_set_mapped_element_buffer_range(r300->draw, indexSize, indexBias,
 760                                          minIndex, maxIndex, indices);
 761
 762     draw_arrays(r300->draw, mode, start, count);
 763
 764     for (i = 0; i < r300->vertex_buffer_count; i++) {
 765         pipe_buffer_unmap(pipe, r300->vertex_buffer[i].buffer,
 766                           vb_transfer[i]);
 767         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 768     }
 769
 770     pipe_buffer_unmap(pipe, indexBuffer,
 771                       ib_transfer);
 772     draw_set_mapped_element_buffer_range(r300->draw, 0, 0,
 773                                          start, start + count - 1,
 774                                          NULL);
 775 }
 776
 777 /* Object for rendering using Draw. */
 778 struct r300_render {
 779     /* Parent class */
 780     struct vbuf_render base;
 781
 782     /* Pipe context */
 783     struct r300_context* r300;
 784
 785     /* Vertex information */
 786     size_t vertex_size;
 787     unsigned prim;
 788     unsigned hwprim;
 789
 790     /* VBO */
 791     struct pipe_resource* vbo;
 792     size_t vbo_size;
 793     size_t vbo_offset;
 794     size_t vbo_max_used;
 795     void * vbo_ptr;
 796
 797    struct pipe_transfer *vbo_transfer;
 798 };
 799
 800 static INLINE struct r300_render*
 801 r300_render(struct vbuf_render* render)
 802 {
 803     return (struct r300_render*)render;
 804 }
 805
 806 static const struct vertex_info*
 807 r300_render_get_vertex_info(struct vbuf_render* render)
 808 {
 809     struct r300_render* r300render = r300_render(render);
 810     struct r300_context* r300 = r300render->r300;
 811
 812     r300_update_derived_state(r300);
 813
 814     return &r300->vertex_info;
 815 }
 816
 817 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
 818                                                    ushort vertex_size,
 819                                                    ushort count)
 820 {
 821     struct r300_render* r300render = r300_render(render);
 822     struct r300_context* r300 = r300render->r300;
 823     struct pipe_screen* screen = r300->context.screen;
 824     size_t size = (size_t)vertex_size * (size_t)count;
 825
 826     if (size + r300render->vbo_offset > r300render->vbo_size)
 827     {
 828         pipe_resource_reference(&r300->vbo, NULL);
 829         r300render->vbo = pipe_buffer_create(screen,
 830                                              PIPE_BIND_VERTEX_BUFFER,
 831                                              R300_MAX_DRAW_VBO_SIZE);
 832         r300render->vbo_offset = 0;
 833         r300render->vbo_size = R300_MAX_DRAW_VBO_SIZE;
 834     }
 835
 836     r300render->vertex_size = vertex_size;
 837     r300->vbo = r300render->vbo;
 838     r300->vbo_offset = r300render->vbo_offset;
 839
 840     return (r300render->vbo) ? TRUE : FALSE;
 841 }
 842
 843 static void* r300_render_map_vertices(struct vbuf_render* render)
 844 {
 845     struct r300_render* r300render = r300_render(render);
 846
 847     r300render->vbo_ptr = pipe_buffer_map(&r300render->r300->context,
 848                                           r300render->vbo,
 849                                           PIPE_TRANSFER_WRITE,
 850                                           &r300render->vbo_transfer);
 851
 852     return ((uint8_t*)r300render->vbo_ptr + r300render->vbo_offset);
 853 }
 854
 855 static void r300_render_unmap_vertices(struct vbuf_render* render,
 856                                              ushort min,
 857                                              ushort max)
 858 {
 859     struct r300_render* r300render = r300_render(render);
 860     struct pipe_context* context = &r300render->r300->context;
 861     CS_LOCALS(r300render->r300);
 862     BEGIN_CS(2);
 863     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 864     END_CS;
 865
 866     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 867                                     r300render->vertex_size * (max + 1));
 868     pipe_buffer_unmap(context, r300render->vbo, r300render->vbo_transfer);
 869 }
 870
 871 static void r300_render_release_vertices(struct vbuf_render* render)
 872 {
 873     struct r300_render* r300render = r300_render(render);
 874
 875     r300render->vbo_offset += r300render->vbo_max_used;
 876     r300render->vbo_max_used = 0;
 877 }
 878
 879 static boolean r300_render_set_primitive(struct vbuf_render* render,
 880                                                unsigned prim)
 881 {
 882     struct r300_render* r300render = r300_render(render);
 883
 884     r300render->prim = prim;
 885     r300render->hwprim = r300_translate_primitive(prim);
 886
 887     return TRUE;
 888 }
 889
 890 static void r500_render_draw_arrays(struct vbuf_render* render,
 891                                     unsigned start,
 892                                     unsigned count)
 893 {
 894     struct r300_render* r300render = r300_render(render);
 895     struct r300_context* r300 = r300render->r300;
 896
 897     CS_LOCALS(r300);
 898
 899     r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + 2);
 900     r300_emit_buffer_validate(r300, FALSE, NULL);
 901     r300_emit_dirty_state(r300);
 902
 903     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 904
 905     r500_emit_index_offset(r300, 0);
 906
 907     BEGIN_CS(2);
 908     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 909     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 910            r300render->hwprim);
 911     END_CS;
 912 }
 913
 914 static void r500_render_draw(struct vbuf_render* render,
 915                              const ushort* indices,
 916                              uint count)
 917 {
 918     struct r300_render* r300render = r300_render(render);
 919     struct r300_context* r300 = r300render->r300;
 920     int i;
 921     unsigned dwords = 2 + (count+1)/2;
 922
 923     CS_LOCALS(r300);
 924
 925     r300_reserve_cs_space(r300, r300_get_num_dirty_dwords(r300) + dwords);
 926     r300_emit_buffer_validate(r300, FALSE, NULL);
 927     r300_emit_dirty_state(r300);
 928
 929     r500_emit_index_offset(r300, 0);
 930
 931     BEGIN_CS(dwords);
 932     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 933     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 934            r300render->hwprim);
 935     for (i = 0; i < count-1; i += 2) {
 936         OUT_CS(indices[i+1] << 16 | indices[i]);
 937     }
 938     if (count % 2) {
 939         OUT_CS(indices[count-1]);
 940     }
 941     END_CS;
 942 }
 943
 944 static void r300_render_draw_arrays(struct vbuf_render* render,
 945                                     unsigned start,
 946                                     unsigned count)
 947 {
 948     struct r300_context* r300 = r300_render(render)->r300;
 949
 950     if (!r300->stencil_ref_bf_fallback) {
 951         r500_render_draw_arrays(render, start, count);
 952     } else {
 953         r300_begin_stencil_ref_fallback(r300);
 954         r500_render_draw_arrays(render, start, count);
 955         r300_switch_stencil_ref_side(r300);
 956         r500_render_draw_arrays(render, start, count);
 957         r300_end_stencil_ref_fallback(r300);
 958     }
 959 }
 960
 961 static void r300_render_draw(struct vbuf_render* render,
 962                              const ushort* indices,
 963                              uint count)
 964 {
 965     struct r300_context* r300 = r300_render(render)->r300;
 966
 967     if (!r300->stencil_ref_bf_fallback) {
 968         r500_render_draw(render, indices, count);
 969     } else {
 970         r300_begin_stencil_ref_fallback(r300);
 971         r500_render_draw(render, indices, count);
 972         r300_switch_stencil_ref_side(r300);
 973         r500_render_draw(render, indices, count);
 974         r300_end_stencil_ref_fallback(r300);
 975     }
 976 }
 977
 978 static void r300_render_destroy(struct vbuf_render* render)
 979 {
 980     FREE(render);
 981 }
 982
 983 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 984 {
 985     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 986
 987     r300render->r300 = r300;
 988
 989     /* XXX find real numbers plz */
 990     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 991     r300render->base.max_indices = 16 * 1024;
 992
 993     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 994     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 995     r300render->base.map_vertices = r300_render_map_vertices;
 996     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 997     r300render->base.set_primitive = r300_render_set_primitive;
 998     if (r300->screen->caps.is_r500) {
 999         r300render->base.draw = r500_render_draw;
1000         r300render->base.draw_arrays = r500_render_draw_arrays;
1001     } else {
1002         r300render->base.draw = r300_render_draw;
1003         r300render->base.draw_arrays = r300_render_draw_arrays;
1004     }
1005     r300render->base.release_vertices = r300_render_release_vertices;
1006     r300render->base.destroy = r300_render_destroy;
1007
1008     r300render->vbo = NULL;
1009     r300render->vbo_size = 0;
1010     r300render->vbo_offset = 0;
1011
1012     return &r300render->base;
1013 }
1014
1015 struct draw_stage* r300_draw_stage(struct r300_context* r300)
1016 {
1017     struct vbuf_render* render;
1018     struct draw_stage* stage;
1019
1020     render = r300_render_create(r300);
1021
1022     if (!render) {
1023         return NULL;
1024     }
1025
1026     stage = draw_vbuf_stage(r300->draw, render);
1027
1028     if (!stage) {
1029         render->destroy(render);
1030         return NULL;
1031     }
1032
1033     draw_set_render(r300->draw, render);
1034
1035     return stage;
1036 }