src/gallium/drivers/identity/id_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   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 VMWARE 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 #include "pipe/p_context.h"
  30 #include "util/u_memory.h"
  31
  32 #include "id_context.h"
  33 #include "id_objects.h"
  34
  35
  36 static void
  37 identity_destroy(struct pipe_context *_pipe)
  38 {
  39    struct identity_context *id_pipe = identity_context(_pipe);
  40    struct pipe_context *pipe = id_pipe->pipe;
  41
  42    pipe->destroy(pipe);
  43
  44    free(id_pipe);
  45 }
  46
  47 static void
  48 identity_draw_arrays(struct pipe_context *_pipe,
  49                      unsigned prim,
  50                      unsigned start,
  51                      unsigned count)
  52 {
  53    struct identity_context *id_pipe = identity_context(_pipe);
  54    struct pipe_context *pipe = id_pipe->pipe;
  55
  56    pipe->draw_arrays(pipe,
  57                      prim,
  58                      start,
  59                      count);
  60 }
  61
  62 static void
  63 identity_draw_elements(struct pipe_context *_pipe,
  64                        struct pipe_buffer *_indexBuffer,
  65                        unsigned indexSize,
  66                        unsigned prim,
  67                        unsigned start,
  68                        unsigned count)
  69 {
  70    struct identity_context *id_pipe = identity_context(_pipe);
  71    struct identity_buffer *id_buffer = identity_buffer(_indexBuffer);
  72    struct pipe_context *pipe = id_pipe->pipe;
  73    struct pipe_buffer *indexBuffer = id_buffer->buffer;
  74
  75    pipe->draw_elements(pipe,
  76                        indexBuffer,
  77                        indexSize,
  78                        prim,
  79                        start,
  80                        count);
  81 }
  82
  83 static void
  84 identity_draw_range_elements(struct pipe_context *_pipe,
  85                              struct pipe_buffer *_indexBuffer,
  86                              unsigned indexSize,
  87                              unsigned minIndex,
  88                              unsigned maxIndex,
  89                              unsigned mode,
  90                              unsigned start,
  91                              unsigned count)
  92 {
  93    struct identity_context *id_pipe = identity_context(_pipe);
  94    struct identity_buffer *id_buffer = identity_buffer(_indexBuffer);
  95    struct pipe_context *pipe = id_pipe->pipe;
  96    struct pipe_buffer *indexBuffer = id_buffer->buffer;
  97
  98    pipe->draw_range_elements(pipe,
  99                              indexBuffer,
 100                              indexSize,
 101                              minIndex,
 102                              maxIndex,
 103                              mode,
 104                              start,
 105                              count);
 106 }
 107
 108 static struct pipe_query *
 109 identity_create_query(struct pipe_context *_pipe,
 110                       unsigned query_type)
 111 {
 112    struct identity_context *id_pipe = identity_context(_pipe);
 113    struct pipe_context *pipe = id_pipe->pipe;
 114
 115    return pipe->create_query(pipe,
 116                              query_type);
 117 }
 118
 119 static void
 120 identity_destroy_query(struct pipe_context *_pipe,
 121                        struct pipe_query *query)
 122 {
 123    struct identity_context *id_pipe = identity_context(_pipe);
 124    struct pipe_context *pipe = id_pipe->pipe;
 125
 126    pipe->destroy_query(pipe,
 127                        query);
 128 }
 129
 130 static void
 131 identity_begin_query(struct pipe_context *_pipe,
 132                      struct pipe_query *query)
 133 {
 134    struct identity_context *id_pipe = identity_context(_pipe);
 135    struct pipe_context *pipe = id_pipe->pipe;
 136
 137    pipe->begin_query(pipe,
 138                      query);
 139 }
 140
 141 static void
 142 identity_end_query(struct pipe_context *_pipe,
 143                    struct pipe_query *query)
 144 {
 145    struct identity_context *id_pipe = identity_context(_pipe);
 146    struct pipe_context *pipe = id_pipe->pipe;
 147
 148    pipe->end_query(pipe,
 149                    query);
 150 }
 151
 152 static boolean
 153 identity_get_query_result(struct pipe_context *_pipe,
 154                           struct pipe_query *query,
 155                           boolean wait,
 156                           uint64_t *result)
 157 {
 158    struct identity_context *id_pipe = identity_context(_pipe);
 159    struct pipe_context *pipe = id_pipe->pipe;
 160
 161    return pipe->get_query_result(pipe,
 162                                  query,
 163                                  wait,
 164                                  result);
 165 }
 166
 167 static void *
 168 identity_create_blend_state(struct pipe_context *_pipe,
 169                             const struct pipe_blend_state *blend)
 170 {
 171    struct identity_context *id_pipe = identity_context(_pipe);
 172    struct pipe_context *pipe = id_pipe->pipe;
 173
 174    return pipe->create_blend_state(pipe,
 175                                    blend);
 176 }
 177
 178 static void
 179 identity_bind_blend_state(struct pipe_context *_pipe,
 180                           void *blend)
 181 {
 182    struct identity_context *id_pipe = identity_context(_pipe);
 183    struct pipe_context *pipe = id_pipe->pipe;
 184
 185    pipe->bind_blend_state(pipe,
 186                               blend);
 187 }
 188
 189 static void
 190 identity_delete_blend_state(struct pipe_context *_pipe,
 191                             void *blend)
 192 {
 193    struct identity_context *id_pipe = identity_context(_pipe);
 194    struct pipe_context *pipe = id_pipe->pipe;
 195
 196    pipe->delete_blend_state(pipe,
 197                             blend);
 198 }
 199
 200 static void *
 201 identity_create_sampler_state(struct pipe_context *_pipe,
 202                               const struct pipe_sampler_state *sampler)
 203 {
 204    struct identity_context *id_pipe = identity_context(_pipe);
 205    struct pipe_context *pipe = id_pipe->pipe;
 206
 207    return pipe->create_sampler_state(pipe,
 208                                      sampler);
 209 }
 210
 211 static void
 212 identity_bind_fragment_sampler_states(struct pipe_context *_pipe,
 213                                       unsigned num_samplers,
 214                                       void **samplers)
 215 {
 216    struct identity_context *id_pipe = identity_context(_pipe);
 217    struct pipe_context *pipe = id_pipe->pipe;
 218
 219    pipe->bind_fragment_sampler_states(pipe,
 220                                       num_samplers,
 221                                       samplers);
 222 }
 223
 224 static void
 225 identity_bind_vertex_sampler_states(struct pipe_context *_pipe,
 226                                     unsigned num_samplers,
 227                                     void **samplers)
 228 {
 229    struct identity_context *id_pipe = identity_context(_pipe);
 230    struct pipe_context *pipe = id_pipe->pipe;
 231
 232    pipe->bind_vertex_sampler_states(pipe,
 233                                     num_samplers,
 234                                     samplers);
 235 }
 236
 237 static void
 238 identity_delete_sampler_state(struct pipe_context *_pipe,
 239                               void *sampler)
 240 {
 241    struct identity_context *id_pipe = identity_context(_pipe);
 242    struct pipe_context *pipe = id_pipe->pipe;
 243
 244    pipe->delete_sampler_state(pipe,
 245                               sampler);
 246 }
 247
 248 static void *
 249 identity_create_rasterizer_state(struct pipe_context *_pipe,
 250                                  const struct pipe_rasterizer_state *rasterizer)
 251 {
 252    struct identity_context *id_pipe = identity_context(_pipe);
 253    struct pipe_context *pipe = id_pipe->pipe;
 254
 255    return pipe->create_rasterizer_state(pipe,
 256                                         rasterizer);
 257 }
 258
 259 static void
 260 identity_bind_rasterizer_state(struct pipe_context *_pipe,
 261                                void *rasterizer)
 262 {
 263    struct identity_context *id_pipe = identity_context(_pipe);
 264    struct pipe_context *pipe = id_pipe->pipe;
 265
 266    pipe->bind_rasterizer_state(pipe,
 267                                rasterizer);
 268 }
 269
 270 static void
 271 identity_delete_rasterizer_state(struct pipe_context *_pipe,
 272                                  void *rasterizer)
 273 {
 274    struct identity_context *id_pipe = identity_context(_pipe);
 275    struct pipe_context *pipe = id_pipe->pipe;
 276
 277    pipe->delete_rasterizer_state(pipe,
 278                                  rasterizer);
 279 }
 280
 281 static void *
 282 identity_create_depth_stencil_alpha_state(struct pipe_context *_pipe,
 283                                           const struct pipe_depth_stencil_alpha_state *depth_stencil_alpha)
 284 {
 285    struct identity_context *id_pipe = identity_context(_pipe);
 286    struct pipe_context *pipe = id_pipe->pipe;
 287
 288    return pipe->create_depth_stencil_alpha_state(pipe,
 289                                                  depth_stencil_alpha);
 290 }
 291
 292 static void
 293 identity_bind_depth_stencil_alpha_state(struct pipe_context *_pipe,
 294                                         void *depth_stencil_alpha)
 295 {
 296    struct identity_context *id_pipe = identity_context(_pipe);
 297    struct pipe_context *pipe = id_pipe->pipe;
 298
 299    pipe->bind_depth_stencil_alpha_state(pipe,
 300                                         depth_stencil_alpha);
 301 }
 302
 303 static void
 304 identity_delete_depth_stencil_alpha_state(struct pipe_context *_pipe,
 305                                           void *depth_stencil_alpha)
 306 {
 307    struct identity_context *id_pipe = identity_context(_pipe);
 308    struct pipe_context *pipe = id_pipe->pipe;
 309
 310    pipe->delete_depth_stencil_alpha_state(pipe,
 311                                           depth_stencil_alpha);
 312 }
 313
 314 static void *
 315 identity_create_fs_state(struct pipe_context *_pipe,
 316                          const struct pipe_shader_state *fs)
 317 {
 318    struct identity_context *id_pipe = identity_context(_pipe);
 319    struct pipe_context *pipe = id_pipe->pipe;
 320
 321    return pipe->create_fs_state(pipe,
 322                                 fs);
 323 }
 324
 325 static void
 326 identity_bind_fs_state(struct pipe_context *_pipe,
 327                        void *fs)
 328 {
 329    struct identity_context *id_pipe = identity_context(_pipe);
 330    struct pipe_context *pipe = id_pipe->pipe;
 331
 332    pipe->bind_fs_state(pipe,
 333                        fs);
 334 }
 335
 336 static void
 337 identity_delete_fs_state(struct pipe_context *_pipe,
 338                          void *fs)
 339 {
 340    struct identity_context *id_pipe = identity_context(_pipe);
 341    struct pipe_context *pipe = id_pipe->pipe;
 342
 343    pipe->delete_fs_state(pipe,
 344                          fs);
 345 }
 346
 347 static void *
 348 identity_create_vs_state(struct pipe_context *_pipe,
 349                          const struct pipe_shader_state *vs)
 350 {
 351    struct identity_context *id_pipe = identity_context(_pipe);
 352    struct pipe_context *pipe = id_pipe->pipe;
 353
 354    return pipe->create_vs_state(pipe,
 355                                 vs);
 356 }
 357
 358 static void
 359 identity_bind_vs_state(struct pipe_context *_pipe,
 360                        void *vs)
 361 {
 362    struct identity_context *id_pipe = identity_context(_pipe);
 363    struct pipe_context *pipe = id_pipe->pipe;
 364
 365    pipe->bind_vs_state(pipe,
 366                        vs);
 367 }
 368
 369 static void
 370 identity_delete_vs_state(struct pipe_context *_pipe,
 371                          void *vs)
 372 {
 373    struct identity_context *id_pipe = identity_context(_pipe);
 374    struct pipe_context *pipe = id_pipe->pipe;
 375
 376    pipe->delete_vs_state(pipe,
 377                          vs);
 378 }
 379
 380 static void
 381 identity_set_blend_color(struct pipe_context *_pipe,
 382                          const struct pipe_blend_color *blend_color)
 383 {
 384    struct identity_context *id_pipe = identity_context(_pipe);
 385    struct pipe_context *pipe = id_pipe->pipe;
 386
 387    pipe->set_blend_color(pipe,
 388                          blend_color);
 389 }
 390
 391 static void
 392 identity_set_stencil_ref(struct pipe_context *_pipe,
 393                          const struct pipe_stencil_ref *stencil_ref)
 394 {
 395    struct identity_context *id_pipe = identity_context(_pipe);
 396    struct pipe_context *pipe = id_pipe->pipe;
 397
 398    pipe->set_stencil_ref(pipe,
 399                          stencil_ref);
 400 }
 401
 402 static void
 403 identity_set_clip_state(struct pipe_context *_pipe,
 404                         const struct pipe_clip_state *clip)
 405 {
 406    struct identity_context *id_pipe = identity_context(_pipe);
 407    struct pipe_context *pipe = id_pipe->pipe;
 408
 409    pipe->set_clip_state(pipe,
 410                         clip);
 411 }
 412
 413 static void
 414 identity_set_constant_buffer(struct pipe_context *_pipe,
 415                              uint shader,
 416                              uint index,
 417                              struct pipe_buffer *_buffer)
 418 {
 419    struct identity_context *id_pipe = identity_context(_pipe);
 420    struct pipe_context *pipe = id_pipe->pipe;
 421    struct pipe_buffer *unwrapped_buffer;
 422    struct pipe_buffer *buffer = NULL;
 423
 424    /* XXX hmm? unwrap the input state */
 425    if (_buffer) {
 426       unwrapped_buffer = identity_buffer_unwrap(_buffer);
 427       buffer = unwrapped_buffer;
 428    }
 429
 430    pipe->set_constant_buffer(pipe,
 431                              shader,
 432                              index,
 433                              buffer);
 434 }
 435
 436 static void
 437 identity_set_framebuffer_state(struct pipe_context *_pipe,
 438                                const struct pipe_framebuffer_state *_state)
 439 {
 440    struct identity_context *id_pipe = identity_context(_pipe);
 441    struct pipe_context *pipe = id_pipe->pipe;
 442    struct pipe_framebuffer_state unwrapped_state;
 443    struct pipe_framebuffer_state *state = NULL;
 444    unsigned i;
 445
 446    /* unwrap the input state */
 447    if (_state) {
 448       memcpy(&unwrapped_state, _state, sizeof(unwrapped_state));
 449       for(i = 0; i < _state->nr_cbufs; i++)
 450          unwrapped_state.cbufs[i] = identity_surface_unwrap(_state->cbufs[i]);
 451       for (; i < PIPE_MAX_COLOR_BUFS; i++)
 452          unwrapped_state.cbufs[i] = NULL;
 453       unwrapped_state.zsbuf = identity_surface_unwrap(_state->zsbuf);
 454       state = &unwrapped_state;
 455    }
 456
 457    pipe->set_framebuffer_state(pipe,
 458                                state);
 459 }
 460
 461 static void
 462 identity_set_polygon_stipple(struct pipe_context *_pipe,
 463                              const struct pipe_poly_stipple *poly_stipple)
 464 {
 465    struct identity_context *id_pipe = identity_context(_pipe);
 466    struct pipe_context *pipe = id_pipe->pipe;
 467
 468    pipe->set_polygon_stipple(pipe,
 469                              poly_stipple);
 470 }
 471
 472 static void
 473 identity_set_scissor_state(struct pipe_context *_pipe,
 474                            const struct pipe_scissor_state *scissor)
 475 {
 476    struct identity_context *id_pipe = identity_context(_pipe);
 477    struct pipe_context *pipe = id_pipe->pipe;
 478
 479    pipe->set_scissor_state(pipe,
 480                            scissor);
 481 }
 482
 483 static void
 484 identity_set_viewport_state(struct pipe_context *_pipe,
 485                             const struct pipe_viewport_state *viewport)
 486 {
 487    struct identity_context *id_pipe = identity_context(_pipe);
 488    struct pipe_context *pipe = id_pipe->pipe;
 489
 490    pipe->set_viewport_state(pipe,
 491                             viewport);
 492 }
 493
 494 static void
 495 identity_set_fragment_sampler_views(struct pipe_context *_pipe,
 496                                     unsigned num,
 497                                     struct pipe_sampler_view **_views)
 498 {
 499    struct identity_context *id_pipe = identity_context(_pipe);
 500    struct pipe_context *pipe = id_pipe->pipe;
 501    struct pipe_sampler_view *unwrapped_views[PIPE_MAX_SAMPLERS];
 502    struct pipe_sampler_view **views = NULL;
 503    unsigned i;
 504
 505    if (_views) {
 506       for (i = 0; i < num; i++)
 507          unwrapped_views[i] = identity_sampler_view_unwrap(_views[i]);
 508       for (; i < PIPE_MAX_SAMPLERS; i++)
 509          unwrapped_views[i] = NULL;
 510
 511       views = unwrapped_views;
 512    }
 513
 514    pipe->set_fragment_sampler_views(pipe, num, views);
 515 }
 516
 517 static void
 518 identity_set_vertex_sampler_views(struct pipe_context *_pipe,
 519                                   unsigned num,
 520                                   struct pipe_sampler_view **_views)
 521 {
 522    struct identity_context *id_pipe = identity_context(_pipe);
 523    struct pipe_context *pipe = id_pipe->pipe;
 524    struct pipe_sampler_view *unwrapped_views[PIPE_MAX_VERTEX_SAMPLERS];
 525    struct pipe_sampler_view **views = NULL;
 526    unsigned i;
 527
 528    if (_views) {
 529       for (i = 0; i < num; i++)
 530          unwrapped_views[i] = identity_sampler_view_unwrap(_views[i]);
 531       for (; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
 532          unwrapped_views[i] = NULL;
 533
 534       views = unwrapped_views;
 535    }
 536
 537    pipe->set_vertex_sampler_views(pipe, num, views);
 538 }
 539
 540 static void
 541 identity_set_vertex_buffers(struct pipe_context *_pipe,
 542                             unsigned num_buffers,
 543                             const struct pipe_vertex_buffer *_buffers)
 544 {
 545    struct identity_context *id_pipe = identity_context(_pipe);
 546    struct pipe_context *pipe = id_pipe->pipe;
 547    struct pipe_vertex_buffer unwrapped_buffers[PIPE_MAX_SHADER_INPUTS];
 548    struct pipe_vertex_buffer *buffers = NULL;
 549    unsigned i;
 550
 551    if (num_buffers) {
 552       memcpy(unwrapped_buffers, _buffers, num_buffers * sizeof(*_buffers));
 553       for (i = 0; i < num_buffers; i++)
 554          unwrapped_buffers[i].buffer = identity_buffer_unwrap(_buffers[i].buffer);
 555       buffers = unwrapped_buffers;
 556    }
 557
 558    pipe->set_vertex_buffers(pipe,
 559                             num_buffers,
 560                             buffers);
 561 }
 562
 563 static void
 564 identity_set_vertex_elements(struct pipe_context *_pipe,
 565                              unsigned num_elements,
 566                              const struct pipe_vertex_element *vertex_elements)
 567 {
 568    struct identity_context *id_pipe = identity_context(_pipe);
 569    struct pipe_context *pipe = id_pipe->pipe;
 570
 571    pipe->set_vertex_elements(pipe,
 572                              num_elements,
 573                              vertex_elements);
 574 }
 575
 576 static void
 577 identity_surface_copy(struct pipe_context *_pipe,
 578                       struct pipe_surface *_dst,
 579                       unsigned dstx,
 580                       unsigned dsty,
 581                       struct pipe_surface *_src,
 582                       unsigned srcx,
 583                       unsigned srcy,
 584                       unsigned width,
 585                       unsigned height)
 586 {
 587    struct identity_context *id_pipe = identity_context(_pipe);
 588    struct identity_surface *id_surface_dst = identity_surface(_dst);
 589    struct identity_surface *id_surface_src = identity_surface(_src);
 590    struct pipe_context *pipe = id_pipe->pipe;
 591    struct pipe_surface *dst = id_surface_dst->surface;
 592    struct pipe_surface *src = id_surface_src->surface;
 593
 594    pipe->surface_copy(pipe,
 595                       dst,
 596                       dstx,
 597                       dsty,
 598                       src,
 599                       srcx,
 600                       srcy,
 601                       width,
 602                       height);
 603 }
 604
 605 static void
 606 identity_surface_fill(struct pipe_context *_pipe,
 607                       struct pipe_surface *_dst,
 608                       unsigned dstx,
 609                       unsigned dsty,
 610                       unsigned width,
 611                       unsigned height,
 612                       unsigned value)
 613 {
 614    struct identity_context *id_pipe = identity_context(_pipe);
 615    struct identity_surface *id_surface_dst = identity_surface(_dst);
 616    struct pipe_context *pipe = id_pipe->pipe;
 617    struct pipe_surface *dst = id_surface_dst->surface;
 618
 619    pipe->surface_fill(pipe,
 620                       dst,
 621                       dstx,
 622                       dsty,
 623                       width,
 624                       height,
 625                       value);
 626 }
 627
 628 static void
 629 identity_clear(struct pipe_context *_pipe,
 630                unsigned buffers,
 631                const float *rgba,
 632                double depth,
 633                unsigned stencil)
 634 {
 635    struct identity_context *id_pipe = identity_context(_pipe);
 636    struct pipe_context *pipe = id_pipe->pipe;
 637
 638    pipe->clear(pipe,
 639                buffers,
 640                rgba,
 641                depth,
 642                stencil);
 643 }
 644
 645 static void
 646 identity_flush(struct pipe_context *_pipe,
 647                unsigned flags,
 648                struct pipe_fence_handle **fence)
 649 {
 650    struct identity_context *id_pipe = identity_context(_pipe);
 651    struct pipe_context *pipe = id_pipe->pipe;
 652
 653    pipe->flush(pipe,
 654                flags,
 655                fence);
 656 }
 657
 658 static unsigned int
 659 identity_is_texture_referenced(struct pipe_context *_pipe,
 660                                struct pipe_texture *_texture,
 661                                unsigned face,
 662                                unsigned level)
 663 {
 664    struct identity_context *id_pipe = identity_context(_pipe);
 665    struct identity_texture *id_texture = identity_texture(_texture);
 666    struct pipe_context *pipe = id_pipe->pipe;
 667    struct pipe_texture *texture = id_texture->texture;
 668
 669    return pipe->is_texture_referenced(pipe,
 670                                       texture,
 671                                       face,
 672                                       level);
 673 }
 674
 675 static unsigned int
 676 identity_is_buffer_referenced(struct pipe_context *_pipe,
 677                               struct pipe_buffer *_buffer)
 678 {
 679    struct identity_context *id_pipe = identity_context(_pipe);
 680    struct identity_buffer *id_buffer = identity_buffer(_buffer);
 681    struct pipe_context *pipe = id_pipe->pipe;
 682    struct pipe_buffer *buffer = id_buffer->buffer;
 683
 684    return pipe->is_buffer_referenced(pipe,
 685                                      buffer);
 686 }
 687
 688 static struct pipe_sampler_view *
 689 identity_create_sampler_view(struct pipe_context *pipe,
 690                              struct pipe_texture *texture,
 691                              const struct pipe_sampler_view *templ)
 692 {
 693    struct identity_context *id_pipe = identity_context(pipe);
 694    struct identity_texture *id_texture = identity_texture(texture);
 695    struct pipe_context *pipe_unwrapped = id_pipe->pipe;
 696    struct pipe_texture *texture_unwrapped = id_texture->texture;
 697    struct identity_sampler_view *view = malloc(sizeof(struct identity_sampler_view));
 698
 699    view->sampler_view = pipe_unwrapped->create_sampler_view(pipe_unwrapped,
 700                                                             texture_unwrapped,
 701                                                             templ);
 702
 703    view->base = *templ;
 704    view->base.reference.count = 1;
 705    view->base.texture = NULL;
 706    pipe_texture_reference(&view->base.texture, texture);
 707    view->base.context = pipe;
 708
 709    return &view->base;
 710 }
 711
 712 static void
 713 identity_sampler_view_destroy(struct pipe_context *pipe,
 714                               struct pipe_sampler_view *view)
 715 {
 716    struct identity_context *id_pipe = identity_context(pipe);
 717    struct identity_sampler_view *id_view = identity_sampler_view(view);
 718    struct pipe_context *pipe_unwrapped = id_pipe->pipe;
 719    struct pipe_sampler_view *view_unwrapped = id_view->sampler_view;
 720
 721    pipe_unwrapped->sampler_view_destroy(pipe_unwrapped,
 722                                         view_unwrapped);
 723
 724    pipe_texture_reference(&view->texture, NULL);
 725    free(view);
 726 }
 727
 728 struct pipe_context *
 729 identity_context_create(struct pipe_screen *_screen, struct pipe_context *pipe)
 730 {
 731    struct identity_context *id_pipe;
 732    (void)identity_screen(_screen);
 733
 734    id_pipe = CALLOC_STRUCT(identity_context);
 735    if (!id_pipe) {
 736       return NULL;
 737    }
 738
 739    id_pipe->base.winsys = NULL;
 740    id_pipe->base.screen = _screen;
 741    id_pipe->base.priv = pipe->priv; /* expose wrapped data */
 742    id_pipe->base.draw = NULL;
 743
 744    id_pipe->base.destroy = identity_destroy;
 745    id_pipe->base.draw_arrays = identity_draw_arrays;
 746    id_pipe->base.draw_elements = identity_draw_elements;
 747    id_pipe->base.draw_range_elements = identity_draw_range_elements;
 748    id_pipe->base.create_query = identity_create_query;
 749    id_pipe->base.destroy_query = identity_destroy_query;
 750    id_pipe->base.begin_query = identity_begin_query;
 751    id_pipe->base.end_query = identity_end_query;
 752    id_pipe->base.get_query_result = identity_get_query_result;
 753    id_pipe->base.create_blend_state = identity_create_blend_state;
 754    id_pipe->base.bind_blend_state = identity_bind_blend_state;
 755    id_pipe->base.delete_blend_state = identity_delete_blend_state;
 756    id_pipe->base.create_sampler_state = identity_create_sampler_state;
 757    id_pipe->base.bind_fragment_sampler_states = identity_bind_fragment_sampler_states;
 758    id_pipe->base.bind_vertex_sampler_states = identity_bind_vertex_sampler_states;
 759    id_pipe->base.delete_sampler_state = identity_delete_sampler_state;
 760    id_pipe->base.create_rasterizer_state = identity_create_rasterizer_state;
 761    id_pipe->base.bind_rasterizer_state = identity_bind_rasterizer_state;
 762    id_pipe->base.delete_rasterizer_state = identity_delete_rasterizer_state;
 763    id_pipe->base.create_depth_stencil_alpha_state = identity_create_depth_stencil_alpha_state;
 764    id_pipe->base.bind_depth_stencil_alpha_state = identity_bind_depth_stencil_alpha_state;
 765    id_pipe->base.delete_depth_stencil_alpha_state = identity_delete_depth_stencil_alpha_state;
 766    id_pipe->base.create_fs_state = identity_create_fs_state;
 767    id_pipe->base.bind_fs_state = identity_bind_fs_state;
 768    id_pipe->base.delete_fs_state = identity_delete_fs_state;
 769    id_pipe->base.create_vs_state = identity_create_vs_state;
 770    id_pipe->base.bind_vs_state = identity_bind_vs_state;
 771    id_pipe->base.delete_vs_state = identity_delete_vs_state;
 772    id_pipe->base.set_blend_color = identity_set_blend_color;
 773    id_pipe->base.set_stencil_ref = identity_set_stencil_ref;
 774    id_pipe->base.set_clip_state = identity_set_clip_state;
 775    id_pipe->base.set_constant_buffer = identity_set_constant_buffer;
 776    id_pipe->base.set_framebuffer_state = identity_set_framebuffer_state;
 777    id_pipe->base.set_polygon_stipple = identity_set_polygon_stipple;
 778    id_pipe->base.set_scissor_state = identity_set_scissor_state;
 779    id_pipe->base.set_viewport_state = identity_set_viewport_state;
 780    id_pipe->base.set_fragment_sampler_views = identity_set_fragment_sampler_views;
 781    id_pipe->base.set_vertex_sampler_views = identity_set_vertex_sampler_views;
 782    id_pipe->base.set_vertex_buffers = identity_set_vertex_buffers;
 783    id_pipe->base.set_vertex_elements = identity_set_vertex_elements;
 784    id_pipe->base.surface_copy = identity_surface_copy;
 785    id_pipe->base.surface_fill = identity_surface_fill;
 786    id_pipe->base.clear = identity_clear;
 787    id_pipe->base.flush = identity_flush;
 788    id_pipe->base.is_texture_referenced = identity_is_texture_referenced;
 789    id_pipe->base.is_buffer_referenced = identity_is_buffer_referenced;
 790    id_pipe->base.create_sampler_view = identity_create_sampler_view;
 791    id_pipe->base.sampler_view_destroy = identity_sampler_view_destroy;
 792
 793    id_pipe->pipe = pipe;
 794
 795    return &id_pipe->base;
 796 }