src/gallium/drivers/r300/r300_render.c

   1 /*
   2  * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 /* r300_render: Vertex and index buffer primitive emission. Contains both
  24  * HW TCL fastpath rendering, and SW TCL Draw-assisted rendering. */
  25
  26 #include "draw/draw_context.h"
  27 #include "draw/draw_vbuf.h"
  28
  29 #include "pipe/p_inlines.h"
  30
  31 #include "util/u_memory.h"
  32 #include "util/u_prim.h"
  33
  34 #include "r300_cs.h"
  35 #include "r300_context.h"
  36 #include "r300_emit.h"
  37 #include "r300_reg.h"
  38 #include "r300_render.h"
  39 #include "r300_state_derived.h"
  40
  41 /* r300_render: Vertex and index buffer primitive emission. */
  42 #define R300_MAX_VBO_SIZE  (1024 * 1024)
  43
  44 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 boolean r300_nothing_to_draw(struct r300_context *r300)
  73 {
  74     return r300->rs_state->rs.scissor &&
  75            r300->scissor_state->scissor.empty_area;
  76 }
  77
  78 static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
  79                                             unsigned mode)
  80 {
  81     uint32_t color_control = r300->rs_state->color_control;
  82
  83     /* By default (see r300_state.c:r300_create_rs_state) color_control is
  84      * initialized to provoking the first vertex.
  85      *
  86      * Triangle fans must be reduced to the second vertex, not the first, in
  87      * Gallium flatshade-first mode, as per the GL spec.
  88      * (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt)
  89      *
  90      * Quads never provoke correctly in flatshade-first mode. The first
  91      * vertex is never considered as provoking, so only the second, third,
  92      * and fourth vertices can be selected, and both "third" and "last" modes
  93      * select the fourth vertex. This is probably due to D3D lacking quads.
  94      *
  95      * Similarly, polygons reduce to the first, not the last, vertex, when in
  96      * "last" mode, and all other modes start from the second vertex.
  97      *
  98      * ~ C.
  99      */
 100
 101     if (r300->rs_state->rs.flatshade_first) {
 102         switch (mode) {
 103             case PIPE_PRIM_TRIANGLE_FAN:
 104                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND;
 105                 break;
 106             case PIPE_PRIM_QUADS:
 107             case PIPE_PRIM_QUAD_STRIP:
 108             case PIPE_PRIM_POLYGON:
 109                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 110                 break;
 111             default:
 112                 color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST;
 113                 break;
 114         }
 115     } else {
 116         color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 117     }
 118
 119     return color_control;
 120 }
 121
 122 static void r300_emit_draw_arrays(struct r300_context *r300,
 123                                   unsigned mode,
 124                                   unsigned count)
 125 {
 126     CS_LOCALS(r300);
 127
 128     BEGIN_CS(8);
 129     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 130             r300_provoking_vertex_fixes(r300, mode));
 131     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
 132     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
 133     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 134     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 135            r300_translate_primitive(mode));
 136     END_CS;
 137 }
 138
 139 static void r300_emit_draw_elements(struct r300_context *r300,
 140                                     struct pipe_buffer* indexBuffer,
 141                                     unsigned indexSize,
 142                                     unsigned minIndex,
 143                                     unsigned maxIndex,
 144                                     unsigned mode,
 145                                     unsigned start,
 146                                     unsigned count)
 147 {
 148     uint32_t count_dwords;
 149     uint32_t offset_dwords = indexSize * start / sizeof(uint32_t);
 150     CS_LOCALS(r300);
 151
 152     /* XXX most of these are stupid */
 153     assert(indexSize == 4 || indexSize == 2);
 154     assert((start * indexSize)  % 4 == 0);
 155     assert(offset_dwords == 0);
 156
 157     BEGIN_CS(14);
 158     OUT_CS_REG(R300_GA_COLOR_CONTROL,
 159             r300_provoking_vertex_fixes(r300, mode));
 160     OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, minIndex);
 161     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, maxIndex);
 162     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
 163     if (indexSize == 4) {
 164         count_dwords = count + start;
 165         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 166                R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
 167                r300_translate_primitive(mode));
 168     } else {
 169         count_dwords = (count + start + 1) / 2;
 170         OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 171                r300_translate_primitive(mode));
 172     }
 173
 174     /* INDX_BUFFER is a truly special packet3.
 175      * Unlike most other packet3, where the offset is after the count,
 176      * the order is reversed, so the relocation ends up carrying the
 177      * size of the indexbuf instead of the offset.
 178      *
 179      * XXX Fix offset
 180      */
 181     OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
 182     OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
 183            (0 << R300_INDX_BUFFER_SKIP_SHIFT));
 184     OUT_CS(offset_dwords);
 185     OUT_CS_RELOC(indexBuffer, count_dwords,
 186         RADEON_GEM_DOMAIN_GTT, 0, 0);
 187
 188     END_CS;
 189 }
 190
 191
 192 static boolean r300_setup_vertex_buffers(struct r300_context *r300)
 193 {
 194     struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
 195     struct pipe_vertex_element *velem = r300->vertex_element;
 196
 197 validate:
 198     for (int i = 0; i < r300->vertex_element_count; i++) {
 199         if (!r300->winsys->add_buffer(r300->winsys,
 200                 vbuf[velem[i].vertex_buffer_index].buffer,
 201             RADEON_GEM_DOMAIN_GTT, 0)) {
 202             r300->context.flush(&r300->context, 0, NULL);
 203             goto validate;
 204         }
 205     }
 206
 207     if (!r300->winsys->validate(r300->winsys)) {
 208         r300->context.flush(&r300->context, 0, NULL);
 209         return r300->winsys->validate(r300->winsys);
 210     }
 211
 212     return TRUE;
 213 }
 214
 215 /* This is the fast-path drawing & emission for HW TCL. */
 216 boolean r300_draw_range_elements(struct pipe_context* pipe,
 217                                  struct pipe_buffer* indexBuffer,
 218                                  unsigned indexSize,
 219                                  unsigned minIndex,
 220                                  unsigned maxIndex,
 221                                  unsigned mode,
 222                                  unsigned start,
 223                                  unsigned count)
 224 {
 225     struct r300_context* r300 = r300_context(pipe);
 226
 227     if (!u_trim_pipe_prim(mode, &count)) {
 228         return FALSE;
 229     }
 230
 231     if (count > 65535) {
 232         return FALSE;
 233     }
 234
 235     if (r300_nothing_to_draw(r300)) {
 236         return TRUE;
 237     }
 238
 239     r300_update_derived_state(r300);
 240
 241     if (!r300_setup_vertex_buffers(r300)) {
 242         return FALSE;
 243     }
 244
 245     if (!r300->winsys->add_buffer(r300->winsys, indexBuffer,
 246                                   RADEON_GEM_DOMAIN_GTT, 0)) {
 247         return FALSE;
 248     }
 249
 250     if (!r300->winsys->validate(r300->winsys)) {
 251         return FALSE;
 252     }
 253
 254     r300_emit_dirty_state(r300);
 255
 256     r300_emit_aos(r300, 0);
 257
 258     r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex, maxIndex,
 259                             mode, start, count);
 260
 261     return TRUE;
 262 }
 263
 264 /* Simple helpers for context setup. Should probably be moved to util. */
 265 boolean r300_draw_elements(struct pipe_context* pipe,
 266                            struct pipe_buffer* indexBuffer,
 267                            unsigned indexSize, unsigned mode,
 268                            unsigned start, unsigned count)
 269 {
 270     return pipe->draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
 271                                      mode, start, count);
 272 }
 273
 274 boolean r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
 275                          unsigned start, unsigned count)
 276 {
 277     struct r300_context* r300 = r300_context(pipe);
 278
 279     if (!u_trim_pipe_prim(mode, &count)) {
 280         return FALSE;
 281     }
 282
 283     if (count > 65535) {
 284         return FALSE;
 285     }
 286
 287     if (r300_nothing_to_draw(r300)) {
 288         return TRUE;
 289     }
 290
 291     r300_update_derived_state(r300);
 292
 293     if (!r300_setup_vertex_buffers(r300)) {
 294         return FALSE;
 295     }
 296
 297     r300_emit_dirty_state(r300);
 298
 299     r300_emit_aos(r300, start);
 300
 301     r300_emit_draw_arrays(r300, mode, count);
 302
 303     return TRUE;
 304 }
 305
 306 /****************************************************************************
 307  * The rest of this file is for SW TCL rendering only. Please be polite and *
 308  * keep these functions separated so that they are easier to locate. ~C.    *
 309  ***************************************************************************/
 310
 311 /* SW TCL arrays, using Draw. */
 312 boolean r300_swtcl_draw_arrays(struct pipe_context* pipe,
 313                                unsigned mode,
 314                                unsigned start,
 315                                unsigned count)
 316 {
 317     struct r300_context* r300 = r300_context(pipe);
 318     int i;
 319
 320     if (!u_trim_pipe_prim(mode, &count)) {
 321         return FALSE;
 322     }
 323
 324     if (r300_nothing_to_draw(r300)) {
 325         return TRUE;
 326     }
 327
 328     for (i = 0; i < r300->vertex_buffer_count; i++) {
 329         void* buf = pipe_buffer_map(pipe->screen,
 330                                     r300->vertex_buffer[i].buffer,
 331                                     PIPE_BUFFER_USAGE_CPU_READ);
 332         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 333     }
 334
 335     draw_set_mapped_element_buffer(r300->draw, 0, NULL);
 336
 337     draw_set_mapped_constant_buffer(r300->draw,
 338             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 339             r300->shader_constants[PIPE_SHADER_VERTEX].count *
 340                 (sizeof(float) * 4));
 341
 342     draw_arrays(r300->draw, mode, start, count);
 343
 344     for (i = 0; i < r300->vertex_buffer_count; i++) {
 345         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 346         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 347     }
 348
 349     return TRUE;
 350 }
 351
 352 /* SW TCL elements, using Draw. */
 353 boolean r300_swtcl_draw_range_elements(struct pipe_context* pipe,
 354                                        struct pipe_buffer* indexBuffer,
 355                                        unsigned indexSize,
 356                                        unsigned minIndex,
 357                                        unsigned maxIndex,
 358                                        unsigned mode,
 359                                        unsigned start,
 360                                        unsigned count)
 361 {
 362     struct r300_context* r300 = r300_context(pipe);
 363     int i;
 364
 365     if (!u_trim_pipe_prim(mode, &count)) {
 366         return FALSE;
 367     }
 368
 369     if (r300_nothing_to_draw(r300)) {
 370         return TRUE;
 371     }
 372
 373     for (i = 0; i < r300->vertex_buffer_count; i++) {
 374         void* buf = pipe_buffer_map(pipe->screen,
 375                                     r300->vertex_buffer[i].buffer,
 376                                     PIPE_BUFFER_USAGE_CPU_READ);
 377         draw_set_mapped_vertex_buffer(r300->draw, i, buf);
 378     }
 379
 380     void* indices = pipe_buffer_map(pipe->screen, indexBuffer,
 381                                     PIPE_BUFFER_USAGE_CPU_READ);
 382     draw_set_mapped_element_buffer_range(r300->draw, indexSize,
 383                                          minIndex, maxIndex, indices);
 384
 385     draw_set_mapped_constant_buffer(r300->draw,
 386             r300->shader_constants[PIPE_SHADER_VERTEX].constants,
 387             r300->shader_constants[PIPE_SHADER_VERTEX].count *
 388                 (sizeof(float) * 4));
 389
 390     draw_arrays(r300->draw, mode, start, count);
 391
 392     for (i = 0; i < r300->vertex_buffer_count; i++) {
 393         pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
 394         draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
 395     }
 396
 397     pipe_buffer_unmap(pipe->screen, indexBuffer);
 398     draw_set_mapped_element_buffer_range(r300->draw, 0, start,
 399                                          start + count - 1, NULL);
 400
 401     return TRUE;
 402 }
 403
 404 /* Object for rendering using Draw. */
 405 struct r300_render {
 406     /* Parent class */
 407     struct vbuf_render base;
 408
 409     /* Pipe context */
 410     struct r300_context* r300;
 411
 412     /* Vertex information */
 413     size_t vertex_size;
 414     unsigned prim;
 415     unsigned hwprim;
 416
 417     /* VBO */
 418     struct pipe_buffer* vbo;
 419     size_t vbo_size;
 420     size_t vbo_offset;
 421     size_t vbo_max_used;
 422     void * vbo_ptr;
 423 };
 424
 425 static INLINE struct r300_render*
 426 r300_render(struct vbuf_render* render)
 427 {
 428     return (struct r300_render*)render;
 429 }
 430
 431 static const struct vertex_info*
 432 r300_render_get_vertex_info(struct vbuf_render* render)
 433 {
 434     struct r300_render* r300render = r300_render(render);
 435     struct r300_context* r300 = r300render->r300;
 436
 437     r300_update_derived_state(r300);
 438
 439     return &r300->vertex_info->vinfo;
 440 }
 441
 442 static boolean r300_render_allocate_vertices(struct vbuf_render* render,
 443                                                    ushort vertex_size,
 444                                                    ushort count)
 445 {
 446     struct r300_render* r300render = r300_render(render);
 447     struct r300_context* r300 = r300render->r300;
 448     struct pipe_screen* screen = r300->context.screen;
 449     size_t size = (size_t)vertex_size * (size_t)count;
 450
 451     if (size + r300render->vbo_offset > r300render->vbo_size)
 452     {
 453         pipe_buffer_reference(&r300->vbo, NULL);
 454         r300render->vbo = pipe_buffer_create(screen,
 455                                              64,
 456                                              PIPE_BUFFER_USAGE_VERTEX,
 457                                              R300_MAX_VBO_SIZE);
 458         r300render->vbo_offset = 0;
 459         r300render->vbo_size = R300_MAX_VBO_SIZE;
 460     }
 461
 462     r300render->vertex_size = vertex_size;
 463     r300->vbo = r300render->vbo;
 464     r300->vbo_offset = r300render->vbo_offset;
 465
 466     return (r300render->vbo) ? TRUE : FALSE;
 467 }
 468
 469 static void* r300_render_map_vertices(struct vbuf_render* render)
 470 {
 471     struct r300_render* r300render = r300_render(render);
 472     struct pipe_screen* screen = r300render->r300->context.screen;
 473
 474     r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
 475                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 476
 477     return (r300render->vbo_ptr + r300render->vbo_offset);
 478 }
 479
 480 static void r300_render_unmap_vertices(struct vbuf_render* render,
 481                                              ushort min,
 482                                              ushort max)
 483 {
 484     struct r300_render* r300render = r300_render(render);
 485     struct pipe_screen* screen = r300render->r300->context.screen;
 486     CS_LOCALS(r300render->r300);
 487     BEGIN_CS(2);
 488     OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
 489     END_CS;
 490
 491     r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
 492                                     r300render->vertex_size * (max + 1));
 493     pipe_buffer_unmap(screen, r300render->vbo);
 494 }
 495
 496 static void r300_render_release_vertices(struct vbuf_render* render)
 497 {
 498     struct r300_render* r300render = r300_render(render);
 499
 500     r300render->vbo_offset += r300render->vbo_max_used;
 501     r300render->vbo_max_used = 0;
 502 }
 503
 504 static boolean r300_render_set_primitive(struct vbuf_render* render,
 505                                                unsigned prim)
 506 {
 507     struct r300_render* r300render = r300_render(render);
 508
 509     r300render->prim = prim;
 510     r300render->hwprim = r300_translate_primitive(prim);
 511
 512     return TRUE;
 513 }
 514
 515 static void r300_render_draw_arrays(struct vbuf_render* render,
 516                                           unsigned start,
 517                                           unsigned count)
 518 {
 519     struct r300_render* r300render = r300_render(render);
 520     struct r300_context* r300 = r300render->r300;
 521
 522     CS_LOCALS(r300);
 523
 524     r300_emit_dirty_state(r300);
 525
 526     DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
 527
 528     BEGIN_CS(2);
 529     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
 530     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
 531            r300render->hwprim);
 532     END_CS;
 533 }
 534
 535 static void r300_render_draw(struct vbuf_render* render,
 536                                    const ushort* indices,
 537                                    uint count)
 538 {
 539     struct r300_render* r300render = r300_render(render);
 540     struct r300_context* r300 = r300render->r300;
 541     int i;
 542
 543     CS_LOCALS(r300);
 544
 545     r300_emit_dirty_state(r300);
 546
 547     BEGIN_CS(2 + (count+1)/2);
 548     OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
 549     OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
 550            r300render->hwprim);
 551     for (i = 0; i < count-1; i += 2) {
 552         OUT_CS(indices[i+1] << 16 | indices[i]);
 553     }
 554     if (count % 2) {
 555         OUT_CS(indices[count-1]);
 556     }
 557     END_CS;
 558 }
 559
 560 static void r300_render_destroy(struct vbuf_render* render)
 561 {
 562     FREE(render);
 563 }
 564
 565 static struct vbuf_render* r300_render_create(struct r300_context* r300)
 566 {
 567     struct r300_render* r300render = CALLOC_STRUCT(r300_render);
 568
 569     r300render->r300 = r300;
 570
 571     /* XXX find real numbers plz */
 572     r300render->base.max_vertex_buffer_bytes = 128 * 1024;
 573     r300render->base.max_indices = 16 * 1024;
 574
 575     r300render->base.get_vertex_info = r300_render_get_vertex_info;
 576     r300render->base.allocate_vertices = r300_render_allocate_vertices;
 577     r300render->base.map_vertices = r300_render_map_vertices;
 578     r300render->base.unmap_vertices = r300_render_unmap_vertices;
 579     r300render->base.set_primitive = r300_render_set_primitive;
 580     r300render->base.draw = r300_render_draw;
 581     r300render->base.draw_arrays = r300_render_draw_arrays;
 582     r300render->base.release_vertices = r300_render_release_vertices;
 583     r300render->base.destroy = r300_render_destroy;
 584
 585     r300render->vbo = NULL;
 586     r300render->vbo_size = 0;
 587     r300render->vbo_offset = 0;
 588
 589     return &r300render->base;
 590 }
 591
 592 struct draw_stage* r300_draw_stage(struct r300_context* r300)
 593 {
 594     struct vbuf_render* render;
 595     struct draw_stage* stage;
 596
 597     render = r300_render_create(r300);
 598
 599     if (!render) {
 600         return NULL;
 601     }
 602
 603     stage = draw_vbuf_stage(r300->draw, render);
 604
 605     if (!stage) {
 606         render->destroy(render);
 607         return NULL;
 608     }
 609
 610     draw_set_render(r300->draw, render);
 611
 612     return stage;
 613 }