src/gallium/auxiliary/draw/draw_pipe_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  * Vertex buffer drawing stage.
  31  *
  32  * \author José Fonseca <jrfonsec@tungstengraphics.com>
  33  * \author Keith Whitwell <keith@tungstengraphics.com>
  34  */
  35
  36
  37 #include "pipe/p_debug.h"
  38 #include "pipe/p_util.h"
  39
  40 #include "draw_vbuf.h"
  41 #include "draw_private.h"
  42 #include "draw_vertex.h"
  43 #include "draw_pipe.h"
  44 #include "translate/translate.h"
  45
  46
  47 /**
  48  * Vertex buffer emit stage.
  49  */
  50 struct vbuf_stage {
  51    struct draw_stage stage; /**< This must be first (base class) */
  52
  53    struct vbuf_render *render;
  54
  55    const struct vertex_info *vinfo;
  56
  57    /** Vertex size in bytes */
  58    unsigned vertex_size;
  59
  60    struct translate *translate;
  61
  62    /* FIXME: we have no guarantee that 'unsigned' is 32bit */
  63
  64    /** Vertices in hardware format */
  65    unsigned *vertices;
  66    unsigned *vertex_ptr;
  67    unsigned max_vertices;
  68    unsigned nr_vertices;
  69
  70    /** Indices */
  71    ushort *indices;
  72    unsigned max_indices;
  73    unsigned nr_indices;
  74
  75    /* Cache point size somewhere it's address won't change:
  76     */
  77    float point_size;
  78 };
  79
  80
  81 /**
  82  * Basically a cast wrapper.
  83  */
  84 static INLINE struct vbuf_stage *
  85 vbuf_stage( struct draw_stage *stage )
  86 {
  87    assert(stage);
  88    return (struct vbuf_stage *)stage;
  89 }
  90
  91
  92 static void vbuf_flush_indices( struct vbuf_stage *vbuf );
  93 static void vbuf_flush_vertices( struct vbuf_stage *vbuf );
  94 static void vbuf_alloc_vertices( struct vbuf_stage *vbuf );
  95
  96
  97 static INLINE boolean
  98 overflow( void *map, void *ptr, unsigned bytes, unsigned bufsz )
  99 {
 100    unsigned long used = (unsigned long) ((char *)ptr - (char *)map);
 101    return (used + bytes) > bufsz;
 102 }
 103
 104
 105 static INLINE void
 106 check_space( struct vbuf_stage *vbuf, unsigned nr )
 107 {
 108    if (vbuf->nr_vertices + nr > vbuf->max_vertices ) {
 109       vbuf_flush_vertices(vbuf);
 110       vbuf_alloc_vertices(vbuf);
 111    }
 112
 113    if (vbuf->nr_indices + nr > vbuf->max_indices )
 114       vbuf_flush_indices(vbuf);
 115 }
 116
 117
 118
 119
 120 /**
 121  * Extract the needed fields from post-transformed vertex and emit
 122  * a hardware(driver) vertex.
 123  * Recall that the vertices are constructed by the 'draw' module and
 124  * have a couple of slots at the beginning (1-dword header, 4-dword
 125  * clip pos) that we ignore here.  We only use the vertex->data[] fields.
 126  */
 127 static INLINE ushort
 128 emit_vertex( struct vbuf_stage *vbuf,
 129              struct vertex_header *vertex )
 130 {
 131    if(vertex->vertex_id == UNDEFINED_VERTEX_ID) {
 132       /* Hmm - vertices are emitted one at a time - better make sure
 133        * set_buffer is efficient.  Consider a special one-shot mode for
 134        * translate.
 135        */
 136       vbuf->translate->set_buffer(vbuf->translate, 0, vertex->data[0], 0);
 137       vbuf->translate->run(vbuf->translate, 0, 1, vbuf->vertex_ptr);
 138
 139       if (1) draw_dump_emitted_vertex(vbuf->vinfo, (uint8_t *)vbuf->vertex_ptr);
 140
 141       vbuf->vertex_ptr += vbuf->vertex_size/4;
 142       vertex->vertex_id = vbuf->nr_vertices++;
 143    }
 144
 145    return vertex->vertex_id;
 146 }
 147
 148
 149 static void
 150 vbuf_tri( struct draw_stage *stage,
 151           struct prim_header *prim )
 152 {
 153    struct vbuf_stage *vbuf = vbuf_stage( stage );
 154    unsigned i;
 155
 156    check_space( vbuf, 3 );
 157
 158    for (i = 0; i < 3; i++) {
 159       vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] );
 160    }
 161 }
 162
 163
 164 static void
 165 vbuf_line( struct draw_stage *stage,
 166            struct prim_header *prim )
 167 {
 168    struct vbuf_stage *vbuf = vbuf_stage( stage );
 169    unsigned i;
 170
 171    check_space( vbuf, 2 );
 172
 173    for (i = 0; i < 2; i++) {
 174       vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] );
 175    }
 176 }
 177
 178
 179 static void
 180 vbuf_point( struct draw_stage *stage,
 181             struct prim_header *prim )
 182 {
 183    struct vbuf_stage *vbuf = vbuf_stage( stage );
 184
 185    check_space( vbuf, 1 );
 186
 187    vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[0] );
 188 }
 189
 190
 191
 192
 193 /**
 194  * Set the prim type for subsequent vertices.
 195  * This may result in a new vertex size.  The existing vbuffer (if any)
 196  * will be flushed if needed and a new one allocated.
 197  */
 198 static void
 199 vbuf_set_prim( struct vbuf_stage *vbuf, uint prim )
 200 {
 201    struct translate_key hw_key;
 202    unsigned dst_offset;
 203    unsigned i;
 204
 205    vbuf->render->set_primitive(vbuf->render, prim);
 206
 207    /* Must do this after set_primitive() above:
 208     *
 209     * XXX: need some state managment to track when this needs to be
 210     * recalculated.  The driver should tell us whether there was a
 211     * state change.
 212     */
 213    vbuf->vinfo = vbuf->render->get_vertex_info(vbuf->render);
 214
 215    if (vbuf->vertex_size != vbuf->vinfo->size * sizeof(float)) {
 216       vbuf_flush_vertices(vbuf);
 217       vbuf->vertex_size = vbuf->vinfo->size * sizeof(float);
 218    }
 219
 220    /* Translate from pipeline vertices to hw vertices.
 221     */
 222    dst_offset = 0;
 223    memset(&hw_key, 0, sizeof(hw_key));
 224
 225    for (i = 0; i < vbuf->vinfo->num_attribs; i++) {
 226       unsigned emit_sz = 0;
 227       unsigned src_buffer = 0;
 228       unsigned output_format;
 229       unsigned src_offset = (vbuf->vinfo->src_index[i] * 4 * sizeof(float) );
 230
 231       switch (vbuf->vinfo->emit[i]) {
 232       case EMIT_4F:
 233          output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 234          emit_sz = 4 * sizeof(float);
 235          break;
 236       case EMIT_3F:
 237          output_format = PIPE_FORMAT_R32G32B32_FLOAT;
 238          emit_sz = 3 * sizeof(float);
 239          break;
 240       case EMIT_2F:
 241          output_format = PIPE_FORMAT_R32G32_FLOAT;
 242          emit_sz = 2 * sizeof(float);
 243          break;
 244       case EMIT_1F:
 245          output_format = PIPE_FORMAT_R32_FLOAT;
 246          emit_sz = 1 * sizeof(float);
 247          break;
 248       case EMIT_1F_PSIZE:
 249          output_format = PIPE_FORMAT_R32_FLOAT;
 250          emit_sz = 1 * sizeof(float);
 251          src_buffer = 1;
 252          src_offset = 0;
 253          break;
 254       case EMIT_4UB:
 255          output_format = PIPE_FORMAT_B8G8R8A8_UNORM;
 256          emit_sz = 4 * sizeof(ubyte);
 257          break;
 258       default:
 259          assert(0);
 260          output_format = PIPE_FORMAT_NONE;
 261          emit_sz = 0;
 262          break;
 263       }
 264
 265       hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 266       hw_key.element[i].input_buffer = src_buffer;
 267       hw_key.element[i].input_offset = src_offset;
 268       hw_key.element[i].output_format = output_format;
 269       hw_key.element[i].output_offset = dst_offset;
 270
 271       dst_offset += emit_sz;
 272    }
 273
 274    hw_key.nr_elements = vbuf->vinfo->num_attribs;
 275    hw_key.output_stride = vbuf->vinfo->size * 4;
 276
 277    /* Don't bother with caching at this stage:
 278     */
 279    if (!vbuf->translate ||
 280        memcmp(&vbuf->translate->key, &hw_key, sizeof(hw_key)) != 0)
 281    {
 282       if (vbuf->translate)
 283          vbuf->translate->release(vbuf->translate);
 284
 285       vbuf->translate = translate_create( &hw_key );
 286
 287       vbuf->translate->set_buffer(vbuf->translate, 1, &vbuf->point_size, 0);
 288    }
 289
 290    vbuf->point_size = vbuf->stage.draw->rasterizer->point_size;
 291
 292    /* Allocate new buffer?
 293     */
 294    if (!vbuf->vertices)
 295       vbuf_alloc_vertices(vbuf);
 296 }
 297
 298
 299 static void
 300 vbuf_first_tri( struct draw_stage *stage,
 301                 struct prim_header *prim )
 302 {
 303    struct vbuf_stage *vbuf = vbuf_stage( stage );
 304
 305    vbuf_flush_indices( vbuf );
 306    stage->tri = vbuf_tri;
 307    vbuf_set_prim(vbuf, PIPE_PRIM_TRIANGLES);
 308    stage->tri( stage, prim );
 309 }
 310
 311
 312 static void
 313 vbuf_first_line( struct draw_stage *stage,
 314                  struct prim_header *prim )
 315 {
 316    struct vbuf_stage *vbuf = vbuf_stage( stage );
 317
 318    vbuf_flush_indices( vbuf );
 319    stage->line = vbuf_line;
 320    vbuf_set_prim(vbuf, PIPE_PRIM_LINES);
 321    stage->line( stage, prim );
 322 }
 323
 324
 325 static void
 326 vbuf_first_point( struct draw_stage *stage,
 327                   struct prim_header *prim )
 328 {
 329    struct vbuf_stage *vbuf = vbuf_stage( stage );
 330
 331    vbuf_flush_indices( vbuf );
 332    stage->point = vbuf_point;
 333    vbuf_set_prim(vbuf, PIPE_PRIM_POINTS);
 334    stage->point( stage, prim );
 335 }
 336
 337
 338 static void
 339 vbuf_flush_indices( struct vbuf_stage *vbuf )
 340 {
 341    if(!vbuf->nr_indices)
 342       return;
 343
 344    assert((uint) (vbuf->vertex_ptr - vbuf->vertices) ==
 345           vbuf->nr_vertices * vbuf->vertex_size / sizeof(unsigned));
 346
 347    vbuf->render->draw(vbuf->render, vbuf->indices, vbuf->nr_indices);
 348
 349    vbuf->nr_indices = 0;
 350 }
 351
 352
 353 /**
 354  * Flush existing vertex buffer and allocate a new one.
 355  *
 356  * XXX: We separate flush-on-index-full and flush-on-vb-full, but may
 357  * raise issues uploading vertices if the hardware wants to flush when
 358  * we flush.
 359  */
 360 static void
 361 vbuf_flush_vertices( struct vbuf_stage *vbuf )
 362 {
 363    if(vbuf->vertices) {
 364       vbuf_flush_indices(vbuf);
 365
 366       /* Reset temporary vertices ids */
 367       if(vbuf->nr_vertices)
 368          draw_reset_vertex_ids( vbuf->stage.draw );
 369
 370       /* Free the vertex buffer */
 371       vbuf->render->release_vertices(vbuf->render,
 372                                      vbuf->vertices,
 373                                      vbuf->vertex_size,
 374                                      vbuf->nr_vertices);
 375       vbuf->max_vertices = vbuf->nr_vertices = 0;
 376       vbuf->vertex_ptr = vbuf->vertices = NULL;
 377
 378    }
 379 }
 380
 381
 382 static void
 383 vbuf_alloc_vertices( struct vbuf_stage *vbuf )
 384 {
 385    assert(!vbuf->nr_indices);
 386    assert(!vbuf->vertices);
 387
 388    /* Allocate a new vertex buffer */
 389    vbuf->max_vertices = vbuf->render->max_vertex_buffer_bytes / vbuf->vertex_size;
 390    vbuf->vertices = (uint *) vbuf->render->allocate_vertices(vbuf->render,
 391                                                              (ushort) vbuf->vertex_size,
 392                                                              (ushort) vbuf->max_vertices);
 393    vbuf->vertex_ptr = vbuf->vertices;
 394 }
 395
 396
 397
 398 static void
 399 vbuf_flush( struct draw_stage *stage, unsigned flags )
 400 {
 401    struct vbuf_stage *vbuf = vbuf_stage( stage );
 402
 403    vbuf_flush_indices( vbuf );
 404
 405    stage->point = vbuf_first_point;
 406    stage->line = vbuf_first_line;
 407    stage->tri = vbuf_first_tri;
 408
 409    if (flags & DRAW_FLUSH_BACKEND)
 410       vbuf_flush_vertices( vbuf );
 411 }
 412
 413
 414 static void
 415 vbuf_reset_stipple_counter( struct draw_stage *stage )
 416 {
 417    /* XXX: Need to do something here for hardware with linestipple.
 418     */
 419    (void) stage;
 420 }
 421
 422
 423 static void vbuf_destroy( struct draw_stage *stage )
 424 {
 425    struct vbuf_stage *vbuf = vbuf_stage( stage );
 426
 427    if(vbuf->indices)
 428       align_free( vbuf->indices );
 429
 430    if(vbuf->translate)
 431       vbuf->translate->release( vbuf->translate );
 432
 433    if (vbuf->render)
 434       vbuf->render->destroy( vbuf->render );
 435
 436    FREE( stage );
 437 }
 438
 439
 440 /**
 441  * Create a new primitive vbuf/render stage.
 442  */
 443 struct draw_stage *draw_vbuf_stage( struct draw_context *draw,
 444                                     struct vbuf_render *render )
 445 {
 446    struct vbuf_stage *vbuf = CALLOC_STRUCT(vbuf_stage);
 447    if (vbuf == NULL)
 448       goto fail;
 449
 450    vbuf->stage.draw = draw;
 451    vbuf->stage.point = vbuf_first_point;
 452    vbuf->stage.line = vbuf_first_line;
 453    vbuf->stage.tri = vbuf_first_tri;
 454    vbuf->stage.flush = vbuf_flush;
 455    vbuf->stage.reset_stipple_counter = vbuf_reset_stipple_counter;
 456    vbuf->stage.destroy = vbuf_destroy;
 457
 458    vbuf->render = render;
 459    vbuf->max_indices = MAX2(render->max_indices, UNDEFINED_VERTEX_ID-1);
 460
 461    vbuf->indices = (ushort *) align_malloc( vbuf->max_indices *
 462                                             sizeof(vbuf->indices[0]),
 463                                             16 );
 464    if (!vbuf->indices)
 465       goto fail;
 466
 467    vbuf->vertices = NULL;
 468    vbuf->vertex_ptr = vbuf->vertices;
 469
 470    return &vbuf->stage;
 471
 472  fail:
 473    if (vbuf)
 474       vbuf_destroy(&vbuf->stage);
 475
 476    return NULL;
 477 }