src/gallium/drivers/r300/r300_render.c

   1 /*
   2  * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 /* r300_render: Vertex and index buffer primitive emission. Contains both
  25  * HW TCL fastpath rendering, and SW TCL Draw-assisted rendering. */
  26
  27 #include "draw/draw_context.h"
  28 #include "draw/draw_vbuf.h"
  29
  30 #include "util/u_inlines.h"
  31
  32 #include "util/u_format.h"
  33 #include "util/u_memory.h"
  34 #include "util/u_upload_mgr.h"
  35 #include "util/u_prim.h"
  36
  37 #include "r300_cs.h"
  38 #include "r300_context.h"
  39 #include "r300_screen_buffer.h"
  40 #include "r300_emit.h"
  41 #include "r300_reg.h"
  42
  43 #include <limits.h>
  44
  45 #define IMMD_DWORDS 32
  46
  47 static uint32_t r300_translate_primitive(unsigned prim)
  48 {
  49     static const int prim_conv[] = {
  50         R300_VAP_VF_CNTL__PRIM_POINTS,
  51         R300_VAP_VF_CNTL__PRIM_LINES,
  52         R300_VAP_VF_CNTL__PRIM_LINE_LOOP,
  53         R300_VAP_VF_CNTL__PRIM_LINE_STRIP,
  54         R300_VAP_VF_CNTL__PRIM_TRIANGLES,
  55         R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP,
  56         R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN,
  57         R300_VAP_VF_CNTL__PRIM_QUADS,
  58         R300_VAP_VF_CNTL__PRIM_QUAD_STRIP,
  59         R300_VAP_VF_CNTL__PRIM_POLYGON,
  60         -1,
  61         -1,
  62         -1,
  63         -1
  64     };
  65     unsigned hwprim = prim_conv[prim];
  66
  67     assert(hwprim != -1);
  68     return hwprim;
  69 }
  70
  71 static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
  72                                             unsigned mode)
  73 {
  74     struct r300_rs_state* rs = (struct r300_rs_state*)r300->rs_state.state;
  75     uint32_t color_control = rs->color_control;
  76
  77     /* By default (see r300_state.c:r300_create_rs_state) color_control is
  78      * initialized to provoking the first vertex.
  79      *
  80      * Triangle fans must be reduced to the second vertex, not the first, in
  81      * Gallium flatshade-first mode, as per the GL spec.
  82      * (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt)
  83      *
  84      * Quads never provoke correctly in flatshade-first mode. The first
  85      * vertex is never considered as provoking, so only the second, third,
  86      * and fourth vertices can be selected, and both "third" and "last" modes
  87      * select the fourth vertex. This is probably due to D3D lacking quads.
  88      *
  89      * Similarly, polygons reduce to the first, not the last, vertex, when in
  90      * "last" mode, and all other modes start from the second vertex.
  91      *
  92      * ~ C.
  93      */
  94
  95     if (rs->rs.flatshade_first) {
  96         switch (mode) {
  97             case PIPE_PRIM_TRIANGLE_FAN:
  98                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND;
  99                 break;
 100             case PIPE_PRIM_QUADS:
 101             case PIPE_PRIM_QUAD_STRIP:
 102             case PIPE_PRIM_POLYGON:
 103                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 104                 break;
 105             default:
 106                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST;
 107                 break;
 108         }
 109     } else {
 110         color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 111     }
 112
 113     return color_control;
 114 }
 115
 116 void r500_emit_index_bias(struct r300_context *r300, int index_bias)
 117 {
 118     CS_LOCALS(r300);
 119
 120     BEGIN_CS(2);
 121     OUT_CS_REG(R500_VAP_INDEX_OFFSET,
 122                (index_bias & 0xFFFFFF) | (index_bias < 0 ? 1<<24 : 0));
 123     END_CS;
 124 }
 125
 126 static void r300_emit_draw_init(struct r300_context *r300, unsigned mode,
 127                                 unsigned min_index, unsigned max_index)
 128 {
 129     CS_LOCALS(r300);
 130
 131     BEGIN_CS(5);
 132     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 133             r300_provoking_vertex_fixes(r300, mode));
 134     OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2);
 135     OUT_CS(max_index);
 136     OUT_CS(min_index);
 137     END_CS;
 138 }
 139
 140 /* This function splits the index bias value into two parts:
 141  * - buffer_offset: the value that can be safely added to buffer offsets
 142  *   in r300_emit_vertex_arrays (it must yield a positive offset when added to
 143  *   a vertex buffer offset)
 144  * - index_offset: the value that must be manually subtracted from indices
 145  *   in an index buffer to achieve negative offsets. */
 146 static void r300_split_index_bias(struct r300_context *r300, int index_bias,
 147                                   int *buffer_offset, int *index_offset)
 148 {
 149     struct pipe_vertex_buffer *vb, *vbufs = r300->vbuf_mgr->real_vertex_buffer;
 150     struct pipe_vertex_element *velem = r300->velems->velem;
 151     unsigned i, size;
 152     int max_neg_bias;
 153
 154     if (index_bias < 0) {
 155         /* See how large index bias we may subtract. We must be careful
 156          * here because negative buffer offsets are not allowed
 157          * by the DRM API. */
 158         max_neg_bias = INT_MAX;
 159         for (i = 0; i < r300->velems->count; i++) {
 160             vb = &vbufs[velem[i].vertex_buffer_index];
 161             size = (vb->buffer_offset + velem[i].src_offset) / vb->stride;
 162             max_neg_bias = MIN2(max_neg_bias, size);
 163         }
 164
 165         /* Now set the minimum allowed value. */
 166         *buffer_offset = MAX2(-max_neg_bias, index_bias);
 167     } else {
 168         /* A positive index bias is OK. */
 169         *buffer_offset = index_bias;
 170     }
 171
 172     *index_offset = index_bias - *buffer_offset;
 173 }
 174
 175 enum r300_prepare_flags {
 176     PREP_EMIT_STATES    = (1 << 0), /* call emit_dirty_state and friends? */
 177     PREP_VALIDATE_VBOS  = (1 << 1), /* validate VBOs? */
 178     PREP_EMIT_VARRAYS       = (1 << 2), /* call emit_vertex_arrays? */
 179     PREP_EMIT_VARRAYS_SWTCL = (1 << 3), /* call emit_vertex_arrays_swtcl? */
 180     PREP_INDEXED        = (1 << 4)  /* is this draw_elements? */
 181 };
 182
 183 /**
 184  * Check if the requested number of dwords is available in the CS and
 185  * if not, flush.
 186  * \param r300          The context.
 187  * \param flags         See r300_prepare_flags.
 188  * \param cs_dwords     The number of dwords to reserve in CS.
 189  * \return TRUE if the CS was flushed
 190  */
 191 static boolean r300_reserve_cs_dwords(struct r300_context *r300,
 192                                       enum r300_prepare_flags flags,
 193                                       unsigned cs_dwords)
 194 {
 195     boolean flushed        = FALSE;
 196     boolean emit_states    = flags & PREP_EMIT_STATES;
 197     boolean emit_vertex_arrays       = flags & PREP_EMIT_VARRAYS;
 198     boolean emit_vertex_arrays_swtcl = flags & PREP_EMIT_VARRAYS_SWTCL;
 199
 200     /* Add dirty state, index offset, and AOS. */
 201     if (emit_states)
 202         cs_dwords += r300_get_num_dirty_dwords(r300);
 203
 204     if (r300->screen->caps.is_r500)
 205         cs_dwords += 2; /* emit_index_offset */
 206
 207     if (emit_vertex_arrays)
 208         cs_dwords += 55; /* emit_vertex_arrays */
 209
 210     if (emit_vertex_arrays_swtcl)
 211         cs_dwords += 7; /* emit_vertex_arrays_swtcl */
 212
 213     cs_dwords += r300_get_num_cs_end_dwords(r300);
 214
 215     /* Reserve requested CS space. */
 216     if (cs_dwords > (RADEON_MAX_CMDBUF_DWORDS - r300->cs->cdw)) {
 217         r300_flush(&r300->context, RADEON_FLUSH_ASYNC, NULL);
 218         flushed = TRUE;
 219     }
 220
 221     return flushed;
 222 }
 223
 224 /**
 225  * Validate buffers and emit dirty state.
 226  * \param r300          The context.
 227  * \param flags         See r300_prepare_flags.
 228  * \param index_buffer  The index buffer to validate. The parameter may be NULL.
 229  * \param buffer_offset The offset passed to emit_vertex_arrays.
 230  * \param index_bias    The index bias to emit.
 231  * \param instance_id   Index of instance to render
 232  * \return TRUE if rendering should be skipped
 233  */
 234 static boolean r300_emit_states(struct r300_context *r300,
 235                                 enum r300_prepare_flags flags,
 236                                 struct pipe_resource *index_buffer,
 237                                 int buffer_offset,
 238                                 int index_bias, int instance_id)
 239 {
 240     boolean emit_states    = flags & PREP_EMIT_STATES;
 241     boolean emit_vertex_arrays       = flags & PREP_EMIT_VARRAYS;
 242     boolean emit_vertex_arrays_swtcl = flags & PREP_EMIT_VARRAYS_SWTCL;
 243     boolean indexed        = flags & PREP_INDEXED;
 244     boolean validate_vbos  = flags & PREP_VALIDATE_VBOS;
 245
 246     /* Validate buffers and emit dirty state if needed. */
 247     if (emit_states || (emit_vertex_arrays && validate_vbos)) {
 248         if (!r300_emit_buffer_validate(r300, validate_vbos,
 249                                        index_buffer)) {
 250            fprintf(stderr, "r300: CS space validation failed. "
 251                    "(not enough memory?) Skipping rendering.\n");
 252            return FALSE;
 253         }
 254     }
 255
 256     if (emit_states)
 257         r300_emit_dirty_state(r300);
 258
 259     if (r300->screen->caps.is_r500) {
 260         if (r300->screen->caps.has_tcl)
 261             r500_emit_index_bias(r300, index_bias);
 262         else
 263             r500_emit_index_bias(r300, 0);
 264     }
 265
 266     if (emit_vertex_arrays &&
 267         (r300->vertex_arrays_dirty ||
 268          r300->vertex_arrays_indexed != indexed ||
 269          r300->vertex_arrays_offset != buffer_offset ||
 270          r300->vertex_arrays_instance_id != instance_id)) {
 271         r300_emit_vertex_arrays(r300, buffer_offset, indexed, instance_id);
 272
 273         r300->vertex_arrays_dirty = FALSE;
 274         r300->vertex_arrays_indexed = indexed;
 275         r300->vertex_arrays_offset = buffer_offset;
 276         r300->vertex_arrays_instance_id = instance_id;
 277     }
 278
 279     if (emit_vertex_arrays_swtcl)
 280         r300_emit_vertex_arrays_swtcl(r300, indexed);
 281
 282     return TRUE;
 283 }
 284
 285 /**
 286  * Check if the requested number of dwords is available in the CS and
 287  * if not, flush. Then validate buffers and emit dirty state.
 288  * \param r300          The context.
 289  * \param flags         See r300_prepare_flags.
 290  * \param index_buffer  The index buffer to validate. The parameter may be NULL.
 291  * \param cs_dwords     The number of dwords to reserve in CS.
 292  * \param buffer_offset The offset passed to emit_vertex_arrays.
 293  * \param index_bias    The index bias to emit.
 294  * \param instance_id The instance to render.
 295  * \return TRUE if rendering should be skipped
 296  */
 297 static boolean r300_prepare_for_rendering(struct r300_context *r300,
 298                                           enum r300_prepare_flags flags,
 299                                           struct pipe_resource *index_buffer,
 300                                           unsigned cs_dwords,
 301                                           int buffer_offset,
 302                                           int index_bias,
 303                                           int instance_id)
 304 {
 305     /* Make sure there is enough space in the command stream and emit states. */
 306     if (r300_reserve_cs_dwords(r300, flags, cs_dwords))
 307         flags |= PREP_EMIT_STATES;
 308
 309     return r300_emit_states(r300, flags, index_buffer, buffer_offset,
 310                             index_bias, instance_id);
 311 }
 312
 313 static boolean immd_is_good_idea(struct r300_context *r300,
 314                                  unsigned count)
 315 {
 316     struct pipe_vertex_element* velem;
 317     struct pipe_resource *buf;
 318     boolean checked[PIPE_MAX_ATTRIBS] = {0};
 319     unsigned vertex_element_count = r300->velems->count;
 320     unsigned i, vbi;
 321
 322     if (DBG_ON(r300, DBG_NO_IMMD)) {
 323         return FALSE;
 324     }
 325
 326     if (r300->draw) {
 327         return FALSE;
 328     }
 329
 330     if (count * r300->velems->vertex_size_dwords > IMMD_DWORDS) {
 331         return FALSE;
 332     }
 333
 334     /* We shouldn't map buffers referenced by CS, busy buffers,
 335      * and ones placed in VRAM. */
 336     for (i = 0; i < vertex_element_count; i++) {
 337         velem = &r300->velems->velem[i];
 338         vbi = velem->vertex_buffer_index;
 339
 340         if (!checked[vbi]) {
 341             buf = r300->vbuf_mgr->real_vertex_buffer[vbi].buffer;
 342
 343             if ((r300_resource(buf)->domain != RADEON_DOMAIN_GTT)) {
 344                 return FALSE;
 345             }
 346
 347             checked[vbi] = TRUE;
 348         }
 349     }
 350     return TRUE;
 351 }
 352
 353 /*****************************************************************************
 354  * The HWTCL draw functions.                                                 *
 355  ****************************************************************************/
 356
 357 static void r300_draw_arrays_immediate(struct r300_context *r300,
 358                                        const struct pipe_draw_info *info)
 359 {
 360     struct pipe_vertex_element* velem;
 361     struct pipe_vertex_buffer* vbuf;
 362     unsigned vertex_element_count = r300->velems->count;
 363     unsigned i, v, vbi;
 364
 365     /* Size of the vertex, in dwords. */
 366     unsigned vertex_size = r300->velems->vertex_size_dwords;
 367
 368     /* The number of dwords for this draw operation. */
 369     unsigned dwords = 4 + info->count * vertex_size;
 370
 371     /* Size of the vertex element, in dwords. */
 372     unsigned size[PIPE_MAX_ATTRIBS];
 373
 374     /* Stride to the same attrib in the next vertex in the vertex buffer,
 375      * in dwords. */
 376     unsigned stride[PIPE_MAX_ATTRIBS];
 377
 378     /* Mapped vertex buffers. */
 379     uint32_t* map[PIPE_MAX_ATTRIBS] = {0};
 380     uint32_t* mapelem[PIPE_MAX_ATTRIBS];
 381
 382     CS_LOCALS(r300);
 383
 384     if (!r300_prepare_for_rendering(r300, PREP_EMIT_STATES, NULL, dwords, 0, 0, -1))
 385         return;
 386
 387     /* Calculate the vertex size, offsets, strides etc. and map the buffers. */
 388     for (i = 0; i < vertex_element_count; i++) {
 389         velem = &r300->velems->velem[i];
 390         size[i] = r300->velems->format_size[i] / 4;
 391         vbi = velem->vertex_buffer_index;
 392         vbuf = &r300->vbuf_mgr->real_vertex_buffer[vbi];
 393         stride[i] = vbuf->stride / 4;
 394
 395         /* Map the buffer. */
 396         if (!map[vbi]) {
 397             map[vbi] = (uint32_t*)r300->rws->buffer_map(
 398                 r300_resource(vbuf->buffer)->buf,
 399                 r300->cs, PIPE_TRANSFER_READ | PIPE_TRANSFER_UNSYNCHRONIZED);
 400             map[vbi] += (vbuf->buffer_offset / 4) + stride[i] * info->start;
 401         }
 402         mapelem[i] = map[vbi] + (velem->src_offset / 4);
 403     }
 404
 405     r300_emit_draw_init(r300, info->mode, 0, info->count-1);
 406
 407     BEGIN_CS(dwords);
 408     OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
 409     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, info->count * vertex_size);
 410     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (info->count << 16) |
 411             r300_translate_primitive(info->mode));
 412
 413     /* Emit vertices. */
 414     for (v = 0; v < info->count; v++) {
 415         for (i = 0; i < vertex_element_count; i++) {
 416             OUT_CS_TABLE(&mapelem[i][stride[i] * v], size[i]);
 417         }
 418     }
 419     END_CS;
 420
 421     /* Unmap buffers. */
 422     for (i = 0; i < vertex_element_count; i++) {
 423         vbi = r300->velems->velem[i].vertex_buffer_index;
 424
 425         if (map[vbi]) {
 426             r300->rws->buffer_unmap(r300_resource(r300->vbuf_mgr->real_vertex_buffer[vbi].buffer)->buf);
 427             map[vbi] = NULL;
 428         }
 429     }
 430 }
 431
 432 static void r300_emit_draw_arrays(struct r300_context *r300,
 433                                   unsigned mode,
 434                                   unsigned count)
 435 {
 436     boolean alt_num_verts = count > 65535;
 437     CS_LOCALS(r300);
 438
 439     if (count >= (1 << 24)) {
 440         fprintf(stderr, "r300: Got a huge number of vertices: %i, "
 441                 "refusing to render.\n", count);
 442         return;
 443     }
 444
 445     r300_emit_draw_init(r300, mode, 0, count-1);
 446
 447     BEGIN_CS(2 + (alt_num_verts ? 2 : 0));
 448     if (alt_num_verts) {
 449         OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
 450     }
 451     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 452     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 453            r300_translate_primitive(mode) |
 454            (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 455     END_CS;
 456 }
 457
 458 static void r300_emit_draw_elements(struct r300_context *r300,
 459                                     struct pipe_resource* indexBuffer,
 460                                     unsigned indexSize,
 461                                     unsigned min_index,
 462                                     unsigned max_index,
 463                                     unsigned mode,
 464                                     unsigned start,
 465                                     unsigned count,
 466                                     uint16_t *imm_indices3)
 467 {
 468     uint32_t count_dwords, offset_dwords;
 469     boolean alt_num_verts = count > 65535;
 470     CS_LOCALS(r300);
 471
 472     if (count >= (1 << 24) || max_index >= (1 << 24)) {
 473         fprintf(stderr, "r300: Got a huge number of vertices: %i, "
 474                 "refusing to render (max_index: %i).\n", count, max_index);
 475         return;
 476     }
 477
 478     DBG(r300, DBG_DRAW, "r300: Indexbuf of %u indices, min %u max %u\n",
 479         count, min_index, max_index);
 480
 481     r300_emit_draw_init(r300, mode, min_index, max_index);
 482
 483     /* If start is odd, render the first triangle with indices embedded
 484      * in the command stream. This will increase start by 3 and make it
 485      * even. We can then proceed without a fallback. */
 486     if (indexSize == 2 && (start & 1) &&
 487         mode == PIPE_PRIM_TRIANGLES) {
 488         BEGIN_CS(4);
 489         OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 2);
 490         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (3 << 16) |
 491                R300_VAP_VF_CNTL__PRIM_TRIANGLES);
 492         OUT_CS(imm_indices3[1] << 16 | imm_indices3[0]);
 493         OUT_CS(imm_indices3[2]);
 494         END_CS;
 495
 496         start += 3;
 497         count -= 3;
 498         if (!count)
 499            return;
 500     }
 501
 502     offset_dwords = indexSize * start / sizeof(uint32_t);
 503
 504     BEGIN_CS(8 + (alt_num_verts ? 2 : 0));
 505     if (alt_num_verts) {
 506         OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
 507     }
 508     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
 509     if (indexSize == 4) {
 510         count_dwords = count;
 511         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 512                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 513                r300_translate_primitive(mode) |
 514                (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 515     } else {
 516         count_dwords = (count + 1) / 2;
 517         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 518                r300_translate_primitive(mode) |
 519                (alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
 520     }
 521
 522     OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
 523     OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
 524            (0 << R300_INDX_BUFFER_SKIP_SHIFT));
 525     OUT_CS(offset_dwords << 2);
 526     OUT_CS(count_dwords);
 527     OUT_CS_RELOC(r300_resource(indexBuffer));
 528     END_CS;
 529 }
 530
 531 static void r300_draw_elements_immediate(struct r300_context *r300,
 532                                          const struct pipe_draw_info *info)
 533 {
 534     uint8_t *ptr1;
 535     uint16_t *ptr2;
 536     uint32_t *ptr4;
 537     unsigned index_size = r300->index_buffer.index_size;
 538     unsigned i, count_dwords = index_size == 4 ? info->count :
 539                                                  (info->count + 1) / 2;
 540     CS_LOCALS(r300);
 541
 542     /* 19 dwords for r300_draw_elements_immediate. Give up if the function fails. */
 543     if (!r300_prepare_for_rendering(r300,
 544             PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS |
 545             PREP_INDEXED, NULL, 2+count_dwords, 0, info->index_bias, -1))
 546         return;
 547
 548     r300_emit_draw_init(r300, info->mode, info->min_index, info->max_index);
 549
 550     BEGIN_CS(2 + count_dwords);
 551     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, count_dwords);
 552
 553     switch (index_size) {
 554     case 1:
 555         ptr1 = r300_resource(r300->index_buffer.buffer)->b.user_ptr;
 556         ptr1 += info->start;
 557
 558         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (info->count << 16) |
 559                r300_translate_primitive(info->mode));
 560
 561         if (info->index_bias && !r300->screen->caps.is_r500) {
 562             for (i = 0; i < info->count-1; i += 2)
 563                 OUT_CS(((ptr1[i+1] + info->index_bias) << 16) |
 564                         (ptr1[i]   + info->index_bias));
 565
 566             if (info->count & 1)
 567                 OUT_CS(ptr1[i] + info->index_bias);
 568         } else {
 569             for (i = 0; i < info->count-1; i += 2)
 570                 OUT_CS(((ptr1[i+1]) << 16) |
 571                         (ptr1[i]  ));
 572
 573             if (info->count & 1)
 574                 OUT_CS(ptr1[i]);
 575         }
 576         break;
 577
 578     case 2:
 579         ptr2 = (uint16_t*)r300_resource(r300->index_buffer.buffer)->b.user_ptr;
 580         ptr2 += info->start;
 581
 582         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (info->count << 16) |
 583                r300_translate_primitive(info->mode));
 584
 585         if (info->index_bias && !r300->screen->caps.is_r500) {
 586             for (i = 0; i < info->count-1; i += 2)
 587                 OUT_CS(((ptr2[i+1] + info->index_bias) << 16) |
 588                         (ptr2[i]   + info->index_bias));
 589
 590             if (info->count & 1)
 591                 OUT_CS(ptr2[i] + info->index_bias);
 592         } else {
 593             OUT_CS_TABLE(ptr2, count_dwords);
 594         }
 595         break;
 596
 597     case 4:
 598         ptr4 = (uint32_t*)r300_resource(r300->index_buffer.buffer)->b.user_ptr;
 599         ptr4 += info->start;
 600
 601         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (info->count << 16) |
 602                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 603                r300_translate_primitive(info->mode));
 604
 605         if (info->index_bias && !r300->screen->caps.is_r500) {
 606             for (i = 0; i < info->count; i++)
 607                 OUT_CS(ptr4[i] + info->index_bias);
 608         } else {
 609             OUT_CS_TABLE(ptr4, count_dwords);
 610         }
 611         break;
 612     }
 613     END_CS;
 614 }
 615
 616 static void r300_draw_elements(struct r300_context *r300,
 617                                const struct pipe_draw_info *info,
 618                                int instance_id)
 619 {
 620     struct pipe_resource *indexBuffer = r300->index_buffer.buffer;
 621     unsigned indexSize = r300->index_buffer.index_size;
 622     struct pipe_resource* orgIndexBuffer = indexBuffer;
 623     unsigned start = info->start;
 624     unsigned count = info->count;
 625     boolean alt_num_verts = r300->screen->caps.is_r500 &&
 626                             count > 65536;
 627     unsigned short_count;
 628     int buffer_offset = 0, index_offset = 0; /* for index bias emulation */
 629     uint16_t indices3[3];
 630
 631     if (info->index_bias && !r300->screen->caps.is_r500) {
 632         r300_split_index_bias(r300, info->index_bias, &buffer_offset, &index_offset);
 633     }
 634
 635     r300_translate_index_buffer(r300, &indexBuffer, &indexSize, index_offset,
 636                                 &start, count);
 637
 638     /* Fallback for misaligned ushort indices. */
 639     if (indexSize == 2 && (start & 1) &&
 640         !r300_resource(indexBuffer)->b.user_ptr) {
 641         /* If we got here, then orgIndexBuffer == indexBuffer. */
 642         uint16_t *ptr = r300->rws->buffer_map(r300_resource(orgIndexBuffer)->buf,
 643                                               r300->cs,
 644                                               PIPE_TRANSFER_READ |
 645                                               PIPE_TRANSFER_UNSYNCHRONIZED);
 646
 647         if (info->mode == PIPE_PRIM_TRIANGLES) {
 648            memcpy(indices3, ptr + start, 6);
 649         } else {
 650             /* Copy the mapped index buffer directly to the upload buffer.
 651              * The start index will be aligned simply from the fact that
 652              * every sub-buffer in the upload buffer is aligned. */
 653             r300_upload_index_buffer(r300, &indexBuffer, indexSize, &start,
 654                                      count, (uint8_t*)ptr);
 655         }
 656         r300->rws->buffer_unmap(r300_resource(orgIndexBuffer)->buf);
 657     } else {
 658         if (r300_resource(indexBuffer)->b.user_ptr)
 659             r300_upload_index_buffer(r300, &indexBuffer, indexSize,
 660                                      &start, count,
 661                                      r300_resource(indexBuffer)->b.user_ptr);
 662     }
 663
 664     /* 19 dwords for emit_draw_elements. Give up if the function fails. */
 665     if (!r300_prepare_for_rendering(r300,
 666             PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS |
 667             PREP_INDEXED, indexBuffer, 19, buffer_offset, info->index_bias,
 668             instance_id))
 669         goto done;
 670
 671     if (alt_num_verts || count <= 65535) {
 672         r300_emit_draw_elements(r300, indexBuffer, indexSize, info->min_index,
 673                                 info->max_index, info->mode, start, count,
 674                                 indices3);
 675     } else {
 676         do {
 677             /* The maximum must be divisible by 4 and 3,
 678              * so that quad and triangle lists are split correctly.
 679              *
 680              * Strips, loops, and fans won't work. */
 681             short_count = MIN2(count, 65532);
 682
 683             r300_emit_draw_elements(r300, indexBuffer, indexSize,
 684                                      info->min_index, info->max_index,
 685                                      info->mode, start, short_count, indices3);
 686
 687             start += short_count;
 688             count -= short_count;
 689
 690             /* 15 dwords for emit_draw_elements */
 691             if (count) {
 692                 if (!r300_prepare_for_rendering(r300,
 693                         PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS | PREP_INDEXED,
 694                         indexBuffer, 19, buffer_offset, info->index_bias,
 695                         instance_id))
 696                     goto done;
 697             }
 698         } while (count);
 699     }
 700
 701 done:
 702     if (indexBuffer != orgIndexBuffer) {
 703         pipe_resource_reference( &indexBuffer, NULL );
 704     }
 705 }
 706
 707 static void r300_draw_arrays(struct r300_context *r300,
 708                              const struct pipe_draw_info *info,
 709                              int instance_id)
 710 {
 711     boolean alt_num_verts = r300->screen->caps.is_r500 &&
 712                             info->count > 65536;
 713     unsigned start = info->start;
 714     unsigned count = info->count;
 715     unsigned short_count;
 716
 717     /* 9 spare dwords for emit_draw_arrays. Give up if the function fails. */
 718     if (!r300_prepare_for_rendering(r300,
 719                                     PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS,
 720                                     NULL, 9, start, 0, instance_id))
 721         return;
 722
 723     if (alt_num_verts || count <= 65535) {
 724         r300_emit_draw_arrays(r300, info->mode, count);
 725     } else {
 726         do {
 727             /* The maximum must be divisible by 4 and 3,
 728              * so that quad and triangle lists are split correctly.
 729              *
 730              * Strips, loops, and fans won't work. */
 731             short_count = MIN2(count, 65532);
 732             r300_emit_draw_arrays(r300, info->mode, short_count);
 733
 734             start += short_count;
 735             count -= short_count;
 736
 737             /* 9 spare dwords for emit_draw_arrays. Give up if the function fails. */
 738             if (count) {
 739                 if (!r300_prepare_for_rendering(r300,
 740                                                 PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS, NULL, 9,
 741                                                 start, 0, instance_id))
 742                     return;
 743             }
 744         } while (count);
 745     }
 746 }
 747
 748 static void r300_draw_arrays_instanced(struct r300_context *r300,
 749                                        const struct pipe_draw_info *info)
 750 {
 751     int i;
 752
 753     for (i = 0; i < info->instance_count; i++)
 754         r300_draw_arrays(r300, info, i);
 755 }
 756
 757 static void r300_draw_elements_instanced(struct r300_context *r300,
 758                                          const struct pipe_draw_info *info)
 759 {
 760     int i;
 761
 762     for (i = 0; i < info->instance_count; i++)
 763         r300_draw_elements(r300, info, i);
 764 }
 765
 766 static void r300_draw_vbo(struct pipe_context* pipe,
 767                           const struct pipe_draw_info *dinfo)
 768 {
 769     struct r300_context* r300 = r300_context(pipe);
 770     struct pipe_draw_info info = *dinfo;
 771
 772     info.indexed = info.indexed && r300->index_buffer.buffer;
 773
 774     if (r300->skip_rendering ||
 775         !u_trim_pipe_prim(info.mode, &info.count)) {
 776         return;
 777     }
 778
 779     r300_update_derived_state(r300);
 780
 781     /* Start the vbuf manager and update buffers if needed. */
 782     if (u_vbuf_draw_begin(r300->vbuf_mgr, &info) & U_VBUF_BUFFERS_UPDATED) {
 783         r300->vertex_arrays_dirty = TRUE;
 784     }
 785
 786     /* Draw. */
 787     if (info.indexed) {
 788         info.start += r300->index_buffer.offset;
 789         info.max_index = MIN2(r300->vbuf_mgr->max_index, info.max_index);
 790
 791         if (info.instance_count <= 1) {
 792             if (info.count <= 8 &&
 793                 r300_resource(r300->index_buffer.buffer)->b.user_ptr) {
 794                 r300_draw_elements_immediate(r300, &info);
 795             } else {
 796                 r300_draw_elements(r300, &info, -1);
 797             }
 798         } else {
 799             r300_draw_elements_instanced(r300, &info);
 800         }
 801     } else {
 802         if (info.instance_count <= 1) {
 803             if (immd_is_good_idea(r300, info.count)) {
 804                 r300_draw_arrays_immediate(r300, &info);
 805             } else {
 806                 r300_draw_arrays(r300, &info, -1);
 807             }
 808         } else {
 809             r300_draw_arrays_instanced(r300, &info);
 810         }
 811     }
 812
 813     u_vbuf_draw_end(r300->vbuf_mgr);
 814 }
 815
 816 /****************************************************************************
 817  * The rest of this file is for SW TCL rendering only. Please be polite and *
 818  * keep these functions separated so that they are easier to locate. ~C.    *
 819  ***************************************************************************/
 820
 821 /* SW TCL elements, using Draw. */
 822 static void r300_swtcl_draw_vbo(struct pipe_context* pipe,
 823                                 const struct pipe_draw_info *info)
 824 {
 825     struct r300_context* r300 = r300_context(pipe);
 826     struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS];
 827     struct pipe_transfer *ib_transfer = NULL;
 828     int i;
 829     void *indices = NULL;
 830     boolean indexed = info->indexed && r300->index_buffer.buffer;
 831
 832     if (r300->skip_rendering) {
 833         return;
 834     }
 835
 836     r300_update_derived_state(r300);
 837
 838     r300_reserve_cs_dwords(r300,
 839             PREP_EMIT_STATES | PREP_EMIT_VARRAYS_SWTCL |
 840             (indexed ? PREP_INDEXED : 0),
 841             indexed ? 256 : 6);
 842
 843     for (i = 0; i < r300->vbuf_mgr->nr_vertex_buffers; i++) {
 844         if (r300->vbuf_mgr->vertex_buffer[i].buffer) {
 845             void *buf = pipe_buffer_map(pipe,
 846                                   r300->vbuf_mgr->vertex_buffer[i].buffer,
 847                                   PIPE_TRANSFER_READ |
 848                                   PIPE_TRANSFER_UNSYNCHRONIZED,
 849                                   &vb_transfer[i]);
 850             draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 851         }
 852     }
 853
 854     if (indexed) {
 855         indices = pipe_buffer_map(pipe, r300->index_buffer.buffer,
 856                                   PIPE_TRANSFER_READ |
 857                                   PIPE_TRANSFER_UNSYNCHRONIZED, &ib_transfer);
 858     }
 859
 860     draw_set_mapped_index_buffer(r300->draw, indices);
 861
 862     r300->draw_vbo_locked = TRUE;
 863     r300->draw_first_emitted = FALSE;
 864     draw_vbo(r300->draw, info);
 865     draw_flush(r300->draw);
 866     r300->draw_vbo_locked = FALSE;
 867
 868     for (i = 0; i < r300->vbuf_mgr->nr_vertex_buffers; i++) {
 869         if (r300->vbuf_mgr->vertex_buffer[i].buffer) {
 870             pipe_buffer_unmap(pipe, vb_transfer[i]);
 871             draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 872         }
 873     }
 874
 875     if (indexed) {
 876         pipe_buffer_unmap(pipe, ib_transfer);
 877         draw_set_mapped_index_buffer(r300->draw, NULL);
 878     }
 879 }
 880
 881 /* Object for rendering using Draw. */
 882 struct r300_render {
 883     /* Parent class */
 884     struct vbuf_render base;
 885
 886     /* Pipe context */
 887     struct r300_context* r300;
 888
 889     /* Vertex information */
 890     size_t vertex_size;
 891     unsigned prim;
 892     unsigned hwprim;
 893
 894     /* VBO */
 895     size_t vbo_max_used;
 896     void * vbo_ptr;
 897
 898     struct pipe_transfer *vbo_transfer;
 899 };
 900
 901 static INLINE struct r300_render*
 902 r300_render(struct vbuf_render* render)
 903 {
 904     return (struct r300_render*)render;
 905 }
 906
 907 static const struct vertex_info*
 908 r300_render_get_vertex_info(struct vbuf_render* render)
 909 {
 910     struct r300_render* r300render = r300_render(render);
 911     struct r300_context* r300 = r300render->r300;
 912
 913     return &r300->vertex_info;
 914 }
 915
 916 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
 917                                                    ushort vertex_size,
 918                                                    ushort count)
 919 {
 920     struct r300_render* r300render = r300_render(render);
 921     struct r300_context* r300 = r300render->r300;
 922     struct pipe_screen* screen = r300->context.screen;
 923     size_t size = (size_t)vertex_size * (size_t)count;
 924
 925     DBG(r300, DBG_DRAW, "r300: render_allocate_vertices (size: %d)\n", size);
 926
 927     if (size + r300->draw_vbo_offset > r300->draw_vbo_size)
 928     {
 929         pipe_resource_reference(&r300->vbo, NULL);
 930         r300->vbo = pipe_buffer_create(screen,
 931                                        PIPE_BIND_VERTEX_BUFFER,
 932                                        PIPE_USAGE_STREAM,
 933                                        R300_MAX_DRAW_VBO_SIZE);
 934         r300->draw_vbo_offset = 0;
 935         r300->draw_vbo_size = R300_MAX_DRAW_VBO_SIZE;
 936     }
 937
 938     r300render->vertex_size = vertex_size;
 939
 940     return (r300->vbo) ? TRUE : FALSE;
 941 }
 942
 943 static void* r300_render_map_vertices(struct vbuf_render* render)
 944 {
 945     struct r300_render* r300render = r300_render(render);
 946     struct r300_context* r300 = r300render->r300;
 947
 948     assert(!r300render->vbo_transfer);
 949
 950     DBG(r300, DBG_DRAW, "r300: render_map_vertices\n");
 951
 952     r300render->vbo_ptr = pipe_buffer_map(&r300render->r300->context,
 953                                           r300->vbo,
 954                                           PIPE_TRANSFER_WRITE |
 955                                           PIPE_TRANSFER_UNSYNCHRONIZED,
 956                                           &r300render->vbo_transfer);
 957
 958     assert(r300render->vbo_ptr);
 959
 960     return ((uint8_t*)r300render->vbo_ptr + r300->draw_vbo_offset);
 961 }
 962
 963 static void r300_render_unmap_vertices(struct vbuf_render* render,
 964                                              ushort min,
 965                                              ushort max)
 966 {
 967     struct r300_render* r300render = r300_render(render);
 968     struct pipe_context* context = &r300render->r300->context;
 969     struct r300_context* r300 = r300render->r300;
 970
 971     assert(r300render->vbo_transfer);
 972
 973     DBG(r300, DBG_DRAW, "r300: render_unmap_vertices\n");
 974
 975     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 976                                     r300render->vertex_size * (max + 1));
 977     pipe_buffer_unmap(context, r300render->vbo_transfer);
 978
 979     r300render->vbo_transfer = NULL;
 980 }
 981
 982 static void r300_render_release_vertices(struct vbuf_render* render)
 983 {
 984     struct r300_render* r300render = r300_render(render);
 985     struct r300_context* r300 = r300render->r300;
 986
 987     DBG(r300, DBG_DRAW, "r300: render_release_vertices\n");
 988
 989     r300->draw_vbo_offset += r300render->vbo_max_used;
 990     r300render->vbo_max_used = 0;
 991 }
 992
 993 static boolean r300_render_set_primitive(struct vbuf_render* render,
 994                                                unsigned prim)
 995 {
 996     struct r300_render* r300render = r300_render(render);
 997
 998     r300render->prim = prim;
 999     r300render->hwprim = r300_translate_primitive(prim);
1000
1001     return TRUE;
1002 }
1003
1004 static void r300_render_draw_arrays(struct vbuf_render* render,
1005                                     unsigned start,
1006                                     unsigned count)
1007 {
1008     struct r300_render* r300render = r300_render(render);
1009     struct r300_context* r300 = r300render->r300;
1010     uint8_t* ptr;
1011     unsigned i;
1012     unsigned dwords = 6;
1013
1014     CS_LOCALS(r300);
1015     (void) i; (void) ptr;
1016
1017     DBG(r300, DBG_DRAW, "r300: render_draw_arrays (count: %d)\n", count);
1018
1019     if (r300->draw_first_emitted) {
1020         if (!r300_prepare_for_rendering(r300,
1021                 PREP_EMIT_STATES | PREP_EMIT_VARRAYS_SWTCL,
1022                 NULL, dwords, 0, 0, -1))
1023             return;
1024     } else {
1025         if (!r300_emit_states(r300,
1026                 PREP_EMIT_STATES | PREP_EMIT_VARRAYS_SWTCL,
1027                 NULL, 0, 0, -1))
1028             return;
1029     }
1030
1031     BEGIN_CS(dwords);
1032     OUT_CS_REG(R300_GA_COLOR_CONTROL,
1033             r300_provoking_vertex_fixes(r300, r300render->prim));
1034     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
1035     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
1036     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
1037            r300render->hwprim);
1038     END_CS;
1039
1040     r300->draw_first_emitted = TRUE;
1041 }
1042
1043 static void r300_render_draw_elements(struct vbuf_render* render,
1044                                       const ushort* indices,
1045                                       uint count)
1046 {
1047     struct r300_render* r300render = r300_render(render);
1048     struct r300_context* r300 = r300render->r300;
1049     int i;
1050     unsigned end_cs_dwords;
1051     unsigned max_index = (r300->draw_vbo_size - r300->draw_vbo_offset) /
1052                          (r300render->r300->vertex_info.size * 4) - 1;
1053     unsigned short_count;
1054     unsigned free_dwords;
1055
1056     CS_LOCALS(r300);
1057     DBG(r300, DBG_DRAW, "r300: render_draw_elements (count: %d)\n", count);
1058
1059     if (r300->draw_first_emitted) {
1060         if (!r300_prepare_for_rendering(r300,
1061                 PREP_EMIT_STATES | PREP_EMIT_VARRAYS_SWTCL | PREP_INDEXED,
1062                 NULL, 256, 0, 0, -1))
1063             return;
1064     } else {
1065         if (!r300_emit_states(r300,
1066                 PREP_EMIT_STATES | PREP_EMIT_VARRAYS_SWTCL | PREP_INDEXED,
1067                 NULL, 0, 0, -1))
1068             return;
1069     }
1070
1071     /* Below we manage the CS space manually because there may be more
1072      * indices than it can fit in CS. */
1073
1074     end_cs_dwords = r300_get_num_cs_end_dwords(r300);
1075
1076     while (count) {
1077         free_dwords = RADEON_MAX_CMDBUF_DWORDS - r300->cs->cdw;
1078
1079         short_count = MIN2(count, (free_dwords - end_cs_dwords - 6) * 2);
1080
1081         BEGIN_CS(6 + (short_count+1)/2);
1082         OUT_CS_REG(R300_GA_COLOR_CONTROL,
1083                 r300_provoking_vertex_fixes(r300, r300render->prim));
1084         OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max_index);
1085         OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (short_count+1)/2);
1086         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (short_count << 16) |
1087                r300render->hwprim);
1088         for (i = 0; i < short_count-1; i += 2) {
1089             OUT_CS(indices[i+1] << 16 | indices[i]);
1090         }
1091         if (short_count % 2) {
1092             OUT_CS(indices[short_count-1]);
1093         }
1094         END_CS;
1095
1096         /* OK now subtract the emitted indices and see if we need to emit
1097          * another draw packet. */
1098         indices += short_count;
1099         count -= short_count;
1100
1101         if (count) {
1102             if (!r300_prepare_for_rendering(r300,
1103                     PREP_EMIT_VARRAYS_SWTCL | PREP_INDEXED,
1104                     NULL, 256, 0, 0, -1))
1105                 return;
1106
1107             end_cs_dwords = r300_get_num_cs_end_dwords(r300);
1108         }
1109     }
1110
1111     r300->draw_first_emitted = TRUE;
1112 }
1113
1114 static void r300_render_destroy(struct vbuf_render* render)
1115 {
1116     FREE(render);
1117 }
1118
1119 static struct vbuf_render* r300_render_create(struct r300_context* r300)
1120 {
1121     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
1122
1123     r300render->r300 = r300;
1124
1125     r300render->base.max_vertex_buffer_bytes = 1024 * 1024;
1126     r300render->base.max_indices = 16 * 1024;
1127
1128     r300render->base.get_vertex_info = r300_render_get_vertex_info;
1129     r300render->base.allocate_vertices = r300_render_allocate_vertices;
1130     r300render->base.map_vertices = r300_render_map_vertices;
1131     r300render->base.unmap_vertices = r300_render_unmap_vertices;
1132     r300render->base.set_primitive = r300_render_set_primitive;
1133     r300render->base.draw_elements = r300_render_draw_elements;
1134     r300render->base.draw_arrays = r300_render_draw_arrays;
1135     r300render->base.release_vertices = r300_render_release_vertices;
1136     r300render->base.destroy = r300_render_destroy;
1137
1138     return &r300render->base;
1139 }
1140
1141 struct draw_stage* r300_draw_stage(struct r300_context* r300)
1142 {
1143     struct vbuf_render* render;
1144     struct draw_stage* stage;
1145
1146     render = r300_render_create(r300);
1147
1148     if (!render) {
1149         return NULL;
1150     }
1151
1152     stage = draw_vbuf_stage(r300->draw, render);
1153
1154     if (!stage) {
1155         render->destroy(render);
1156         return NULL;
1157     }
1158
1159     draw_set_render(r300->draw, render);
1160
1161     return stage;
1162 }
1163
1164 void r300_draw_flush_vbuf(struct r300_context *r300)
1165 {
1166     pipe_resource_reference(&r300->vbo, NULL);
1167     r300->draw_vbo_size = 0;
1168 }
1169
1170 /****************************************************************************
1171  *                         End of SW TCL functions                          *
1172  ***************************************************************************/
1173
1174 /* This functions is used to draw a rectangle for the blitter module.
1175  *
1176  * If we rendered a quad, the pixels on the main diagonal
1177  * would be computed and stored twice, which makes the clear/copy codepaths
1178  * somewhat inefficient. Instead we use a rectangular point sprite. */
1179 static void r300_blitter_draw_rectangle(struct blitter_context *blitter,
1180                                         unsigned x1, unsigned y1,
1181                                         unsigned x2, unsigned y2,
1182                                         float depth,
1183                                         enum blitter_attrib_type type,
1184                                         const float attrib[4])
1185 {
1186     struct r300_context *r300 = r300_context(util_blitter_get_pipe(blitter));
1187     unsigned last_sprite_coord_enable = r300->sprite_coord_enable;
1188     unsigned width = x2 - x1;
1189     unsigned height = y2 - y1;
1190     unsigned vertex_size =
1191             type == UTIL_BLITTER_ATTRIB_COLOR || !r300->draw ? 8 : 4;
1192     unsigned dwords = 13 + vertex_size +
1193                       (type == UTIL_BLITTER_ATTRIB_TEXCOORD ? 7 : 0);
1194     const float zeros[4] = {0, 0, 0, 0};
1195     CS_LOCALS(r300);
1196
1197     if (r300->skip_rendering)
1198         return;
1199
1200     r300->context.set_vertex_buffers(&r300->context, 0, NULL);
1201
1202     if (type == UTIL_BLITTER_ATTRIB_TEXCOORD)
1203         r300->sprite_coord_enable = 1;
1204
1205     r300_update_derived_state(r300);
1206
1207     /* Mark some states we don't care about as non-dirty. */
1208     r300->clip_state.dirty = FALSE;
1209     r300->viewport_state.dirty = FALSE;
1210
1211     if (!r300_prepare_for_rendering(r300, PREP_EMIT_STATES, NULL, dwords, 0, 0, -1))
1212         goto done;
1213
1214     DBG(r300, DBG_DRAW, "r300: draw_rectangle\n");
1215
1216     BEGIN_CS(dwords);
1217     /* Set up GA. */
1218     OUT_CS_REG(R300_GA_POINT_SIZE, (height * 6) | ((width * 6) << 16));
1219
1220     if (type == UTIL_BLITTER_ATTRIB_TEXCOORD) {
1221         /* Set up the GA to generate texcoords. */
1222         OUT_CS_REG(R300_GB_ENABLE, R300_GB_POINT_STUFF_ENABLE |
1223                    (R300_GB_TEX_STR << R300_GB_TEX0_SOURCE_SHIFT));
1224         OUT_CS_REG_SEQ(R300_GA_POINT_S0, 4);
1225         OUT_CS_32F(attrib[0]);
1226         OUT_CS_32F(attrib[3]);
1227         OUT_CS_32F(attrib[2]);
1228         OUT_CS_32F(attrib[1]);
1229     }
1230
1231     /* Set up VAP controls. */
1232     OUT_CS_REG(R300_VAP_CLIP_CNTL, R300_CLIP_DISABLE);
1233     OUT_CS_REG(R300_VAP_VTE_CNTL, R300_VTX_XY_FMT | R300_VTX_Z_FMT);
1234     OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
1235     OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2);
1236     OUT_CS(1);
1237     OUT_CS(0);
1238
1239     /* Draw. */
1240     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, vertex_size);
1241     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (1 << 16) |
1242            R300_VAP_VF_CNTL__PRIM_POINTS);
1243
1244     OUT_CS_32F(x1 + width * 0.5f);
1245     OUT_CS_32F(y1 + height * 0.5f);
1246     OUT_CS_32F(depth);
1247     OUT_CS_32F(1);
1248
1249     if (vertex_size == 8) {
1250         if (!attrib)
1251             attrib = zeros;
1252         OUT_CS_TABLE(attrib, 4);
1253     }
1254     END_CS;
1255
1256 done:
1257     /* Restore the state. */
1258     r300_mark_atom_dirty(r300, &r300->clip_state);
1259     r300_mark_atom_dirty(r300, &r300->rs_state);
1260     r300_mark_atom_dirty(r300, &r300->viewport_state);
1261
1262     r300->sprite_coord_enable = last_sprite_coord_enable;
1263 }
1264
1265 static void r300_resource_resolve(struct pipe_context* pipe,
1266                                   struct pipe_resource* dest,
1267                                   unsigned dst_layer,
1268                                   struct pipe_resource* src,
1269                                   unsigned src_layer)
1270 {
1271     struct r300_context* r300 = r300_context(pipe);
1272     struct pipe_surface* srcsurf, surf_tmpl;
1273     struct r300_aa_state *aa = (struct r300_aa_state*)r300->aa_state.state;
1274     float color[] = {0, 0, 0, 0};
1275
1276     memset(&surf_tmpl, 0, sizeof(surf_tmpl));
1277     surf_tmpl.format = src->format;
1278     surf_tmpl.usage = 0; /* not really a surface hence no bind flags */
1279     surf_tmpl.u.tex.level = 0; /* msaa resources cannot have mipmaps */
1280     surf_tmpl.u.tex.first_layer = src_layer;
1281     surf_tmpl.u.tex.last_layer = src_layer;
1282     srcsurf = pipe->create_surface(pipe, src, &surf_tmpl);
1283     surf_tmpl.format = dest->format;
1284     surf_tmpl.u.tex.first_layer = dst_layer;
1285     surf_tmpl.u.tex.last_layer = dst_layer;
1286
1287     DBG(r300, DBG_DRAW, "r300: Resolving resource...\n");
1288
1289     /* Enable AA resolve. */
1290     aa->dest = r300_surface(pipe->create_surface(pipe, dest, &surf_tmpl));
1291
1292     aa->aaresolve_ctl =
1293         R300_RB3D_AARESOLVE_CTL_AARESOLVE_MODE_RESOLVE |
1294         R300_RB3D_AARESOLVE_CTL_AARESOLVE_ALPHA_AVERAGE;
1295     r300->aa_state.size = 10;
1296     r300_mark_atom_dirty(r300, &r300->aa_state);
1297
1298     /* Resolve the surface. */
1299     r300->context.clear_render_target(pipe,
1300         srcsurf, color, 0, 0, src->width0, src->height0);
1301
1302     /* Disable AA resolve. */
1303     aa->aaresolve_ctl = 0;
1304     r300->aa_state.size = 4;
1305     r300_mark_atom_dirty(r300, &r300->aa_state);
1306
1307     pipe_surface_reference((struct pipe_surface**)&srcsurf, NULL);
1308     pipe_surface_reference((struct pipe_surface**)&aa->dest, NULL);
1309 }
1310
1311 void r300_init_render_functions(struct r300_context *r300)
1312 {
1313     /* Set draw functions based on presence of HW TCL. */
1314     if (r300->screen->caps.has_tcl) {
1315         r300->context.draw_vbo = r300_draw_vbo;
1316     } else {
1317         r300->context.draw_vbo = r300_swtcl_draw_vbo;
1318     }
1319
1320     r300->context.resource_resolve = r300_resource_resolve;
1321     r300->blitter->draw_rectangle = r300_blitter_draw_rectangle;
1322
1323     /* Plug in the two-sided stencil reference value fallback if needed. */
1324     if (!r300->screen->caps.is_r500)
1325         r300_plug_in_stencil_ref_fallback(r300);
1326 }