src/gallium/drivers/i915simple/i915_prim_vbuf.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * \file
  30  * Build post-transformation, post-clipping vertex buffers and element
  31  * lists by hooking into the end of the primitive pipeline and
  32  * manipulating the vertex_id field in the vertex headers.
  33  *
  34  * XXX: work in progress
  35  *
  36  * \author José Fonseca <jrfonseca@tungstengraphics.com>
  37  * \author Keith Whitwell <keith@tungstengraphics.com>
  38  */
  39
  40
  41 #include "draw/draw_context.h"
  42 #include "draw/draw_vbuf.h"
  43 #include "pipe/p_debug.h"
  44 #include "pipe/p_inlines.h"
  45 #include "pipe/internal/p_winsys_screen.h"
  46 #include "util/u_math.h"
  47 #include "util/u_memory.h"
  48
  49 #include "i915_context.h"
  50 #include "i915_reg.h"
  51 #include "i915_winsys.h"
  52 #include "i915_batch.h"
  53 #include "i915_state.h"
  54
  55
  56 /**
  57  * Primitive renderer for i915.
  58  */
  59 struct i915_vbuf_render {
  60    struct vbuf_render base;
  61
  62    struct i915_context *i915;
  63
  64    /** Vertex size in bytes */
  65    unsigned vertex_size;
  66
  67    /** Software primitive */
  68    unsigned prim;
  69
  70    /** Hardware primitive */
  71    unsigned hwprim;
  72
  73    /** Genereate a vertex list */
  74    unsigned fallback;
  75
  76    /* Stuff for the vbo */
  77    struct pipe_buffer *vbo;
  78    size_t vbo_size;
  79    size_t vbo_offset;
  80    void *vbo_ptr;
  81    size_t vbo_alloc_size;
  82 };
  83
  84
  85 /**
  86  * Basically a cast wrapper.
  87  */
  88 static INLINE struct i915_vbuf_render *
  89 i915_vbuf_render( struct vbuf_render *render )
  90 {
  91    assert(render);
  92    return (struct i915_vbuf_render *)render;
  93 }
  94
  95
  96 static const struct vertex_info *
  97 i915_vbuf_render_get_vertex_info( struct vbuf_render *render )
  98 {
  99    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 100    struct i915_context *i915 = i915_render->i915;
 101
 102    if (i915->dirty) {
 103       /* make sure we have up to date vertex layout */
 104       i915_update_derived( i915 );
 105    }
 106
 107    return &i915->current.vertex_info;
 108 }
 109
 110
 111 static void *
 112 i915_vbuf_render_allocate_vertices( struct vbuf_render *render,
 113                                     ushort vertex_size,
 114                                     ushort nr_vertices )
 115 {
 116    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 117    struct i915_context *i915 = i915_render->i915;
 118    struct pipe_screen *screen = i915->pipe.screen;
 119    size_t size = (size_t)vertex_size * (size_t)nr_vertices;
 120
 121    /* FIXME: handle failure */
 122    assert(!i915->vbo);
 123
 124    if (i915_render->vbo_size > size + i915_render->vbo_offset && !i915->vbo_flushed) {
 125    } else {
 126       i915->vbo_flushed = 0;
 127       pipe_buffer_reference(screen, &i915_render->vbo, NULL);
 128    }
 129
 130    if (!i915_render->vbo) {
 131       i915_render->vbo_size = MAX2(size, i915_render->vbo_alloc_size);
 132       i915_render->vbo_offset = 0;
 133       i915_render->vbo = pipe_buffer_create(screen,
 134                                             64,
 135                                             I915_BUFFER_USAGE_LIT_VERTEX,
 136                                             i915_render->vbo_size);
 137       i915_render->vbo_ptr = pipe_buffer_map(screen,
 138                                              i915_render->vbo,
 139                                              PIPE_BUFFER_USAGE_CPU_WRITE);
 140       pipe_buffer_unmap(screen, i915_render->vbo);
 141    }
 142
 143    i915->vbo = i915_render->vbo;
 144    i915->vbo_offset = i915_render->vbo_offset;
 145    i915->dirty |= I915_NEW_VBO;
 146
 147    return (unsigned char *)i915_render->vbo_ptr + i915->vbo_offset;
 148 }
 149
 150
 151 static boolean
 152 i915_vbuf_render_set_primitive( struct vbuf_render *render,
 153                                 unsigned prim )
 154 {
 155    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 156    i915_render->prim = prim;
 157
 158    switch(prim) {
 159    case PIPE_PRIM_POINTS:
 160       i915_render->hwprim = PRIM3D_POINTLIST;
 161       i915_render->fallback = 0;
 162       return TRUE;
 163    case PIPE_PRIM_LINES:
 164       i915_render->hwprim = PRIM3D_LINELIST;
 165       i915_render->fallback = 0;
 166       return TRUE;
 167    case PIPE_PRIM_LINE_LOOP:
 168       i915_render->hwprim = PRIM3D_LINELIST;
 169       i915_render->fallback = PIPE_PRIM_LINE_LOOP;
 170       return TRUE;
 171    case PIPE_PRIM_LINE_STRIP:
 172       i915_render->hwprim = PRIM3D_LINESTRIP;
 173       i915_render->fallback = 0;
 174       return TRUE;
 175    case PIPE_PRIM_TRIANGLES:
 176       i915_render->hwprim = PRIM3D_TRILIST;
 177       i915_render->fallback = 0;
 178       return TRUE;
 179    case PIPE_PRIM_TRIANGLE_STRIP:
 180       i915_render->hwprim = PRIM3D_TRISTRIP;
 181       i915_render->fallback = 0;
 182       return TRUE;
 183    case PIPE_PRIM_TRIANGLE_FAN:
 184       i915_render->hwprim = PRIM3D_TRIFAN;
 185       i915_render->fallback = 0;
 186       return TRUE;
 187    case PIPE_PRIM_QUADS:
 188       i915_render->hwprim = PRIM3D_TRILIST;
 189       i915_render->fallback = PIPE_PRIM_QUADS;
 190       return TRUE;
 191    case PIPE_PRIM_QUAD_STRIP:
 192       i915_render->hwprim = PRIM3D_TRILIST;
 193       i915_render->fallback = PIPE_PRIM_QUAD_STRIP;
 194       return TRUE;
 195    case PIPE_PRIM_POLYGON:
 196       i915_render->hwprim = PRIM3D_POLY;
 197       i915_render->fallback = 0;
 198       return TRUE;
 199    default:
 200       /* FIXME: Actually, can handle a lot more just fine... */
 201       return FALSE;
 202    }
 203 }
 204
 205
 206
 207 /**
 208  * Used for fallbacks in draw_arrays
 209  */
 210 static void
 211 draw_arrays_generate_indices( struct vbuf_render *render,
 212                               unsigned start, uint nr,
 213                               unsigned type )
 214 {
 215    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 216    struct i915_context *i915 = i915_render->i915;
 217    unsigned i;
 218    unsigned end = start + nr;
 219    switch(type) {
 220    case 0:
 221       for (i = start; i+1 < end; i += 2)
 222          OUT_BATCH( (i+0) | (i+1) << 16 );
 223       if (i < end)
 224          OUT_BATCH( i );
 225       break;
 226    case PIPE_PRIM_LINE_LOOP:
 227       if (nr >= 2) {
 228          for (i = start + 1; i < end; i++)
 229             OUT_BATCH( (i-0) | (i+0) << 16 );
 230          OUT_BATCH( (i-0) | (  start) << 16 );
 231       }
 232       break;
 233    case PIPE_PRIM_QUADS:
 234       for (i = start; i + 3 < end; i += 4) {
 235          OUT_BATCH( (i+0) | (i+1) << 16 );
 236          OUT_BATCH( (i+3) | (i+1) << 16 );
 237          OUT_BATCH( (i+2) | (i+3) << 16 );
 238       }
 239       break;
 240    case PIPE_PRIM_QUAD_STRIP:
 241       for (i = start; i + 3 < end; i += 2) {
 242          OUT_BATCH( (i+0) | (i+1) << 16 );
 243          OUT_BATCH( (i+3) | (i+2) << 16 );
 244          OUT_BATCH( (i+0) | (i+3) << 16 );
 245       }
 246       break;
 247    default:
 248       assert(0);
 249    }
 250 }
 251
 252 static unsigned
 253 draw_arrays_calc_nr_indices( uint nr, unsigned type )
 254 {
 255    switch (type) {
 256    case 0:
 257       return nr;
 258    case PIPE_PRIM_LINE_LOOP:
 259       if (nr >= 2)
 260          return nr * 2;
 261       else
 262          return 0;
 263    case PIPE_PRIM_QUADS:
 264       return (nr / 4) * 6;
 265    case PIPE_PRIM_QUAD_STRIP:
 266       return ((nr - 2) / 2) * 6;
 267    default:
 268       assert(0);
 269       return 0;
 270    }
 271 }
 272
 273 static void
 274 draw_arrays_fallback( struct vbuf_render *render,
 275                       unsigned start,
 276                       uint nr )
 277 {
 278    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 279    struct i915_context *i915 = i915_render->i915;
 280    unsigned nr_indices;
 281
 282    if (i915->dirty)
 283       i915_update_derived( i915 );
 284
 285    if (i915->hardware_dirty)
 286       i915_emit_hardware_state( i915 );
 287
 288    nr_indices = draw_arrays_calc_nr_indices( nr, i915_render->fallback );
 289    if (!nr_indices)
 290       return;
 291
 292    if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
 293       FLUSH_BATCH(NULL);
 294
 295       /* Make sure state is re-emitted after a flush:
 296        */
 297       i915_update_derived( i915 );
 298       i915_emit_hardware_state( i915 );
 299       i915->vbo_flushed = 1;
 300
 301       if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
 302          assert(0);
 303          goto out;
 304       }
 305    }
 306    OUT_BATCH( _3DPRIMITIVE |
 307               PRIM_INDIRECT |
 308               i915_render->hwprim |
 309               PRIM_INDIRECT_ELTS |
 310               nr_indices );
 311
 312    draw_arrays_generate_indices( render, start, nr, i915_render->fallback );
 313
 314 out:
 315    return;
 316 }
 317
 318 static void
 319 i915_vbuf_render_draw_arrays( struct vbuf_render *render,
 320                               unsigned start,
 321                               uint nr )
 322 {
 323    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 324
 325    if (i915_render->fallback) {
 326       draw_arrays_fallback( render, start, nr );
 327       return;
 328    }
 329
 330    /* JB: TODO submit direct cmds */
 331    draw_arrays_fallback( render, start, nr );
 332 }
 333
 334 /**
 335  * Used for normal and fallback emitting of indices
 336  * If type is zero normal operation assumed.
 337  */
 338 static void
 339 draw_generate_indices( struct vbuf_render *render,
 340                        const ushort *indices,
 341                        uint nr_indices,
 342                        unsigned type )
 343 {
 344    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 345    struct i915_context *i915 = i915_render->i915;
 346    unsigned i;
 347
 348    switch(type) {
 349    case 0:
 350       for (i = 0; i + 1 < nr_indices; i += 2) {
 351          OUT_BATCH( indices[i] | indices[i+1] << 16 );
 352       }
 353       if (i < nr_indices) {
 354          OUT_BATCH( indices[i] );
 355       }
 356       break;
 357    case PIPE_PRIM_LINE_LOOP:
 358       if (nr_indices >= 2) {
 359          for (i = 1; i < nr_indices; i++)
 360             OUT_BATCH( indices[i-1] | indices[i] << 16 );
 361          OUT_BATCH( indices[i-1] | indices[0] << 16 );
 362       }
 363       break;
 364    case PIPE_PRIM_QUADS:
 365       for (i = 0; i + 3 < nr_indices; i += 4) {
 366          OUT_BATCH( indices[i+0] | indices[i+1] << 16 );
 367          OUT_BATCH( indices[i+3] | indices[i+1] << 16 );
 368          OUT_BATCH( indices[i+2] | indices[i+3] << 16 );
 369       }
 370       break;
 371    case PIPE_PRIM_QUAD_STRIP:
 372       for (i = 0; i + 3 < nr_indices; i += 2) {
 373          OUT_BATCH( indices[i+0] | indices[i+1] << 16 );
 374          OUT_BATCH( indices[i+3] | indices[i+2] << 16 );
 375          OUT_BATCH( indices[i+0] | indices[i+3] << 16 );
 376       }
 377       break;
 378    default:
 379       assert(0);
 380       break;
 381    }
 382 }
 383
 384 static unsigned
 385 draw_calc_nr_indices( uint nr_indices, unsigned type )
 386 {
 387    switch (type) {
 388    case 0:
 389       return nr_indices;
 390    case PIPE_PRIM_LINE_LOOP:
 391       if (nr_indices >= 2)
 392          return nr_indices * 2;
 393       else
 394          return 0;
 395    case PIPE_PRIM_QUADS:
 396       return (nr_indices / 4) * 6;
 397    case PIPE_PRIM_QUAD_STRIP:
 398       return ((nr_indices - 2) / 2) * 6;
 399    default:
 400       assert(0);
 401       return 0;
 402    }
 403 }
 404
 405 static void
 406 i915_vbuf_render_draw( struct vbuf_render *render,
 407                        const ushort *indices,
 408                        uint nr_indices)
 409 {
 410    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 411    struct i915_context *i915 = i915_render->i915;
 412    unsigned save_nr_indices;
 413
 414    save_nr_indices = nr_indices;
 415
 416    nr_indices = draw_calc_nr_indices( nr_indices, i915_render->fallback );
 417    if (!nr_indices)
 418       return;
 419
 420    if (i915->dirty)
 421       i915_update_derived( i915 );
 422
 423    if (i915->hardware_dirty)
 424       i915_emit_hardware_state( i915 );
 425
 426    if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
 427       FLUSH_BATCH(NULL);
 428
 429       /* Make sure state is re-emitted after a flush:
 430        */
 431       i915_update_derived( i915 );
 432       i915_emit_hardware_state( i915 );
 433       i915->vbo_flushed = 1;
 434
 435       if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
 436          assert(0);
 437      goto out;
 438       }
 439    }
 440
 441    OUT_BATCH( _3DPRIMITIVE |
 442               PRIM_INDIRECT |
 443               i915_render->hwprim |
 444               PRIM_INDIRECT_ELTS |
 445               nr_indices );
 446    draw_generate_indices( render,
 447                           indices,
 448                           save_nr_indices,
 449                           i915_render->fallback );
 450
 451 out:
 452    return;
 453 }
 454
 455
 456 static void
 457 i915_vbuf_render_release_vertices( struct vbuf_render *render,
 458                                    void *vertices,
 459                                    unsigned vertex_size,
 460                                    unsigned vertices_used )
 461 {
 462    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 463    struct i915_context *i915 = i915_render->i915;
 464    size_t size = (size_t)vertex_size * (size_t)vertices_used;
 465
 466    assert(i915->vbo);
 467
 468    i915_render->vbo_offset += size;
 469    i915->vbo = NULL;
 470    i915->dirty |= I915_NEW_VBO;
 471 }
 472
 473
 474 static void
 475 i915_vbuf_render_destroy( struct vbuf_render *render )
 476 {
 477    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 478    FREE(i915_render);
 479 }
 480
 481
 482 /**
 483  * Create a new primitive render.
 484  */
 485 static struct vbuf_render *
 486 i915_vbuf_render_create( struct i915_context *i915 )
 487 {
 488    struct i915_vbuf_render *i915_render = CALLOC_STRUCT(i915_vbuf_render);
 489    struct pipe_screen *screen = i915->pipe.screen;
 490
 491    i915_render->i915 = i915;
 492
 493    i915_render->base.max_vertex_buffer_bytes = 128*1024;
 494
 495    /* NOTE: it must be such that state and vertices indices fit in a single
 496     * batch buffer.
 497     */
 498    i915_render->base.max_indices = 16*1024;
 499
 500    i915_render->base.get_vertex_info = i915_vbuf_render_get_vertex_info;
 501    i915_render->base.allocate_vertices = i915_vbuf_render_allocate_vertices;
 502    i915_render->base.set_primitive = i915_vbuf_render_set_primitive;
 503    i915_render->base.draw = i915_vbuf_render_draw;
 504    i915_render->base.draw_arrays = i915_vbuf_render_draw_arrays;
 505    i915_render->base.release_vertices = i915_vbuf_render_release_vertices;
 506    i915_render->base.destroy = i915_vbuf_render_destroy;
 507
 508    i915_render->vbo_alloc_size = 128 * 4096;
 509    i915_render->vbo_size = i915_render->vbo_alloc_size;
 510    i915_render->vbo_offset = 0;
 511    i915_render->vbo = pipe_buffer_create(screen,
 512                                          64,
 513                                          I915_BUFFER_USAGE_LIT_VERTEX,
 514                                          i915_render->vbo_size);
 515    i915_render->vbo_ptr = pipe_buffer_map(screen,
 516                                           i915_render->vbo,
 517                                           PIPE_BUFFER_USAGE_CPU_WRITE);
 518    pipe_buffer_unmap(screen, i915_render->vbo);
 519
 520    return &i915_render->base;
 521 }
 522
 523
 524 /**
 525  * Create a new primitive vbuf/render stage.
 526  */
 527 struct draw_stage *i915_draw_vbuf_stage( struct i915_context *i915 )
 528 {
 529    struct vbuf_render *render;
 530    struct draw_stage *stage;
 531
 532    render = i915_vbuf_render_create(i915);
 533    if(!render)
 534       return NULL;
 535
 536    stage = draw_vbuf_stage( i915->draw, render );
 537    if(!stage) {
 538       render->destroy(render);
 539       return NULL;
 540    }
 541    /** TODO JB: this shouldn't be here */
 542    draw_set_render(i915->draw, render);
 543
 544    return stage;
 545 }