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_util.h"
  45 #include "pipe/p_inlines.h"
  46 #include "pipe/p_winsys.h"
  47
  48 #include "i915_context.h"
  49 #include "i915_reg.h"
  50 #include "i915_winsys.h"
  51 #include "i915_batch.h"
  52 #include "i915_state.h"
  53
  54
  55 /**
  56  * Primitive renderer for i915.
  57  */
  58 struct i915_vbuf_render {
  59    struct vbuf_render base;
  60
  61    struct i915_context *i915;
  62
  63    /** Vertex size in bytes */
  64    unsigned vertex_size;
  65
  66    /** Software primitive */
  67    unsigned prim;
  68
  69    /** Hardware primitive */
  70    unsigned hwprim;
  71
  72    /** Genereate a vertex list */
  73    unsigned fallback;
  74
  75    /* Stuff for the vbo */
  76    struct pipe_buffer *vbo;
  77    size_t vbo_size;
  78    size_t vbo_offset;
  79    void *vbo_ptr;
  80    size_t vbo_alloc_size;
  81 };
  82
  83
  84 /**
  85  * Basically a cast wrapper.
  86  */
  87 static INLINE struct i915_vbuf_render *
  88 i915_vbuf_render( struct vbuf_render *render )
  89 {
  90    assert(render);
  91    return (struct i915_vbuf_render *)render;
  92 }
  93
  94
  95 static const struct vertex_info *
  96 i915_vbuf_render_get_vertex_info( struct vbuf_render *render )
  97 {
  98    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
  99    struct i915_context *i915 = i915_render->i915;
 100
 101    if (i915->dirty) {
 102       /* make sure we have up to date vertex layout */
 103       i915_update_derived( i915 );
 104    }
 105
 106    return &i915->current.vertex_info;
 107 }
 108
 109
 110 static void *
 111 i915_vbuf_render_allocate_vertices( struct vbuf_render *render,
 112                                     ushort vertex_size,
 113                                     ushort nr_vertices )
 114 {
 115    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 116    struct i915_context *i915 = i915_render->i915;
 117    struct pipe_winsys *winsys = i915->pipe.winsys;
 118    size_t size = (size_t)vertex_size * (size_t)nr_vertices;
 119
 120    /* FIXME: handle failure */
 121    assert(!i915->vbo);
 122
 123    if (i915_render->vbo_size > size + i915_render->vbo_offset && !i915->vbo_flushed) {
 124    } else {
 125       i915->vbo_flushed = 0;
 126       pipe_buffer_reference(winsys, &i915_render->vbo, NULL);
 127    }
 128
 129    if (!i915_render->vbo) {
 130       i915_render->vbo_size = MAX2(size, i915_render->vbo_alloc_size);
 131       i915_render->vbo_offset = 0;
 132       i915_render->vbo = winsys->buffer_create(winsys,
 133                                                64,
 134                                                I915_BUFFER_USAGE_LIT_VERTEX,
 135                                                i915_render->vbo_size);
 136       i915_render->vbo_ptr = winsys->buffer_map(winsys,
 137                                                 i915_render->vbo,
 138                                                 PIPE_BUFFER_USAGE_CPU_WRITE);
 139       winsys->buffer_unmap(winsys, i915_render->vbo);
 140    }
 141
 142    i915->vbo = i915_render->vbo;
 143    i915->vbo_offset = i915_render->vbo_offset;
 144    i915->dirty |= I915_NEW_VBO;
 145
 146    return (unsigned char *)i915_render->vbo_ptr + i915->vbo_offset;
 147 }
 148
 149
 150 static boolean
 151 i915_vbuf_render_set_primitive( struct vbuf_render *render,
 152                                 unsigned prim )
 153 {
 154    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 155    i915_render->prim = prim;
 156
 157    switch(prim) {
 158    case PIPE_PRIM_POINTS:
 159       i915_render->hwprim = PRIM3D_POINTLIST;
 160       i915_render->fallback = 0;
 161       return TRUE;
 162    case PIPE_PRIM_LINES:
 163       i915_render->hwprim = PRIM3D_LINELIST;
 164       i915_render->fallback = 0;
 165       return TRUE;
 166    case PIPE_PRIM_LINE_STRIP:
 167       i915_render->hwprim = PRIM3D_LINESTRIP;
 168       i915_render->fallback = 0;
 169       return TRUE;
 170    case PIPE_PRIM_TRIANGLES:
 171       i915_render->hwprim = PRIM3D_TRILIST;
 172       i915_render->fallback = 0;
 173       return TRUE;
 174    case PIPE_PRIM_TRIANGLE_STRIP:
 175       i915_render->hwprim = PRIM3D_TRISTRIP;
 176       i915_render->fallback = 0;
 177       return TRUE;
 178    case PIPE_PRIM_QUADS:
 179       i915_render->hwprim = PRIM3D_TRILIST;
 180       i915_render->fallback = PIPE_PRIM_QUADS;
 181       return TRUE;
 182    case PIPE_PRIM_QUAD_STRIP:
 183       i915_render->hwprim = PRIM3D_TRILIST;
 184       i915_render->fallback = PIPE_PRIM_QUAD_STRIP;
 185       return TRUE;
 186    default:
 187       /* Actually, can handle a lot more just fine...  Fixme.
 188        */
 189       return FALSE;
 190    }
 191 }
 192
 193
 194
 195 /**
 196  * Used for fallbacks in draw_arrays
 197  */
 198 static void
 199 draw_arrays_generate_indices( struct vbuf_render *render,
 200                               unsigned start, uint nr,
 201                               unsigned type )
 202 {
 203    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 204    struct i915_context *i915 = i915_render->i915;
 205    unsigned i;
 206    unsigned end = start + nr;
 207    switch(type) {
 208    case 0:
 209       for (i = start; i+1 < end; i += 2)
 210          OUT_BATCH( (i+0) | (i+1) << 16 );
 211       if (i < end)
 212          OUT_BATCH( i );
 213       break;
 214    case PIPE_PRIM_QUADS:
 215       for (i = start; i + 3 < end; i += 4) {
 216          OUT_BATCH( (i+0) | (i+1) << 16 );
 217          OUT_BATCH( (i+3) | (i+1) << 16 );
 218          OUT_BATCH( (i+2) | (i+3) << 16 );
 219       }
 220       break;
 221    case PIPE_PRIM_QUAD_STRIP:
 222       for (i = start; i + 3 < end; i += 2) {
 223          OUT_BATCH( (i+0) | (i+1) << 16 );
 224          OUT_BATCH( (i+3) | (i+2) << 16 );
 225          OUT_BATCH( (i+0) | (i+3) << 16 );
 226       }
 227       break;
 228    default:
 229       assert(0);
 230    }
 231 }
 232
 233 static unsigned
 234 draw_arrays_calc_nr_indices( uint nr, unsigned type )
 235 {
 236    switch (type) {
 237    case 0:
 238       return nr;
 239    case PIPE_PRIM_QUADS:
 240       return (nr / 4) * 6;
 241    case PIPE_PRIM_QUAD_STRIP:
 242       return ((nr - 2) / 2) * 6;
 243    default:
 244       assert(0);
 245       return 0;
 246    }
 247 }
 248
 249 static void
 250 draw_arrays_fallback( struct vbuf_render *render,
 251                       unsigned start,
 252                       uint nr )
 253 {
 254    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 255    struct i915_context *i915 = i915_render->i915;
 256    struct pipe_winsys *winsys = i915->pipe.winsys;
 257    unsigned nr_indices;
 258
 259    if (i915->dirty)
 260       i915_update_derived( i915 );
 261
 262    if (i915->hardware_dirty)
 263       i915_emit_hardware_state( i915 );
 264
 265    nr_indices = draw_arrays_calc_nr_indices( nr, i915_render->fallback );
 266
 267    if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
 268       FLUSH_BATCH(NULL);
 269
 270       /* Make sure state is re-emitted after a flush:
 271        */
 272       i915_update_derived( i915 );
 273       i915_emit_hardware_state( i915 );
 274       i915->vbo_flushed = 1;
 275
 276       if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
 277          assert(0);
 278          goto out;
 279       }
 280    }
 281    OUT_BATCH( _3DPRIMITIVE |
 282               PRIM_INDIRECT |
 283               i915_render->hwprim |
 284               PRIM_INDIRECT_ELTS |
 285               nr_indices );
 286
 287    draw_arrays_generate_indices( render, start, nr, i915_render->fallback );
 288
 289 out:
 290    return;
 291 }
 292
 293 static void
 294 i915_vbuf_render_draw_arrays( struct vbuf_render *render,
 295                               unsigned start,
 296                               uint nr )
 297 {
 298    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 299
 300    if (i915_render->fallback) {
 301       draw_arrays_fallback( render, start, nr );
 302       return;
 303    }
 304
 305    /* JB: TODO submit direct cmds */
 306    draw_arrays_fallback( render, start, nr );
 307 }
 308
 309 /**
 310  * Used for normal and fallback emitting of indices
 311  * If type is zero normal operation assumed.
 312  */
 313 static void
 314 draw_generate_indices( struct vbuf_render *render,
 315                        const ushort *indices,
 316                        uint nr_indices,
 317                        unsigned type )
 318 {
 319    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 320    struct i915_context *i915 = i915_render->i915;
 321    unsigned i;
 322
 323    switch(type) {
 324    case 0:
 325       for (i = 0; i + 1 < nr_indices; i += 2) {
 326          OUT_BATCH( indices[i] | indices[i+1] << 16 );
 327       }
 328       if (i < nr_indices) {
 329          OUT_BATCH( indices[i] );
 330       }
 331       break;
 332    case PIPE_PRIM_QUADS:
 333       for (i = 0; i + 3 < nr_indices; i += 4) {
 334          OUT_BATCH( indices[i+0] | indices[i+1] << 16 );
 335          OUT_BATCH( indices[i+3] | indices[i+1] << 16 );
 336          OUT_BATCH( indices[i+2] | indices[i+3] << 16 );
 337       }
 338       break;
 339    case PIPE_PRIM_QUAD_STRIP:
 340       for (i = 0; i + 3 < nr_indices; i += 2) {
 341          OUT_BATCH( indices[i+0] | indices[i+1] << 16 );
 342          OUT_BATCH( indices[i+3] | indices[i+2] << 16 );
 343          OUT_BATCH( indices[i+0] | indices[i+3] << 16 );
 344       }
 345       break;
 346    default:
 347       assert(0);
 348       break;
 349    }
 350 }
 351
 352 static unsigned
 353 draw_calc_nr_indices( uint nr_indices, unsigned type )
 354 {
 355    switch (type) {
 356    case 0:
 357       return nr_indices;
 358    case PIPE_PRIM_QUADS:
 359       return (nr_indices / 4) * 6;
 360    case PIPE_PRIM_QUAD_STRIP:
 361       return ((nr_indices - 2) / 2) * 6;
 362    default:
 363       assert(0);
 364       return 0;
 365    }
 366 }
 367
 368 static void
 369 i915_vbuf_render_draw( struct vbuf_render *render,
 370                        const ushort *indices,
 371                        uint nr_indices)
 372 {
 373    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 374    struct i915_context *i915 = i915_render->i915;
 375    struct pipe_winsys *winsys = i915->pipe.winsys;
 376    unsigned save_nr_indices;
 377
 378    save_nr_indices = nr_indices;
 379    nr_indices = draw_calc_nr_indices( nr_indices, i915_render->fallback );
 380
 381    assert(nr_indices);
 382
 383    if (i915->dirty)
 384       i915_update_derived( i915 );
 385
 386    if (i915->hardware_dirty)
 387       i915_emit_hardware_state( i915 );
 388
 389    if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
 390       FLUSH_BATCH(NULL);
 391
 392       /* Make sure state is re-emitted after a flush:
 393        */
 394       i915_update_derived( i915 );
 395       i915_emit_hardware_state( i915 );
 396       i915->vbo_flushed = 1;
 397
 398       if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
 399          assert(0);
 400      goto out;
 401       }
 402    }
 403
 404    OUT_BATCH( _3DPRIMITIVE |
 405               PRIM_INDIRECT |
 406               i915_render->hwprim |
 407               PRIM_INDIRECT_ELTS |
 408               nr_indices );
 409    draw_generate_indices( render,
 410                           indices,
 411                           save_nr_indices,
 412                           i915_render->fallback );
 413
 414 out:
 415    return;
 416 }
 417
 418
 419 static void
 420 i915_vbuf_render_release_vertices( struct vbuf_render *render,
 421                                    void *vertices,
 422                                    unsigned vertex_size,
 423                                    unsigned vertices_used )
 424 {
 425    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 426    struct i915_context *i915 = i915_render->i915;
 427    struct pipe_winsys *winsys = i915->pipe.winsys;
 428    size_t size = (size_t)vertex_size * (size_t)vertices_used;
 429
 430    assert(i915->vbo);
 431
 432    i915_render->vbo_offset += size;
 433    i915->vbo = NULL;
 434    i915->dirty |= I915_NEW_VBO;
 435 }
 436
 437
 438 static void
 439 i915_vbuf_render_destroy( struct vbuf_render *render )
 440 {
 441    struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
 442    FREE(i915_render);
 443 }
 444
 445
 446 /**
 447  * Create a new primitive render.
 448  */
 449 static struct vbuf_render *
 450 i915_vbuf_render_create( struct i915_context *i915 )
 451 {
 452    struct i915_vbuf_render *i915_render = CALLOC_STRUCT(i915_vbuf_render);
 453    struct pipe_winsys *winsys = i915->pipe.winsys;
 454
 455    i915_render->i915 = i915;
 456
 457    i915_render->base.max_vertex_buffer_bytes = 128*1024;
 458
 459    /* NOTE: it must be such that state and vertices indices fit in a single
 460     * batch buffer.
 461     */
 462    i915_render->base.max_indices = 16*1024;
 463
 464    i915_render->base.get_vertex_info = i915_vbuf_render_get_vertex_info;
 465    i915_render->base.allocate_vertices = i915_vbuf_render_allocate_vertices;
 466    i915_render->base.set_primitive = i915_vbuf_render_set_primitive;
 467    i915_render->base.draw = i915_vbuf_render_draw;
 468    i915_render->base.draw_arrays = i915_vbuf_render_draw_arrays;
 469    i915_render->base.release_vertices = i915_vbuf_render_release_vertices;
 470    i915_render->base.destroy = i915_vbuf_render_destroy;
 471
 472    i915_render->vbo_alloc_size = 128 * 4096;
 473    i915_render->vbo_size = i915_render->vbo_alloc_size;
 474    i915_render->vbo_offset = 0;
 475    i915_render->vbo = winsys->buffer_create(winsys,
 476                                             64,
 477                                             I915_BUFFER_USAGE_LIT_VERTEX,
 478                                             i915_render->vbo_size);
 479    i915_render->vbo_ptr = winsys->buffer_map(winsys,
 480                                              i915_render->vbo,
 481                                              PIPE_BUFFER_USAGE_CPU_WRITE);
 482    winsys->buffer_unmap(winsys, i915_render->vbo);
 483
 484    return &i915_render->base;
 485 }
 486
 487
 488 /**
 489  * Create a new primitive vbuf/render stage.
 490  */
 491 struct draw_stage *i915_draw_vbuf_stage( struct i915_context *i915 )
 492 {
 493    struct vbuf_render *render;
 494    struct draw_stage *stage;
 495
 496    render = i915_vbuf_render_create(i915);
 497    if(!render)
 498       return NULL;
 499
 500    stage = draw_vbuf_stage( i915->draw, render );
 501    if(!stage) {
 502       render->destroy(render);
 503       return NULL;
 504    }
 505    draw_set_render(i915->draw, render);
 506
 507    return stage;
 508 }