src/gallium/auxiliary/cso_cache/cso_context.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   *
  31   * Wrap the cso cache & hash mechanisms in a simplified
  32   * pipe-driver-specific interface.
  33   *
  34   * @author Zack Rusin <zack@tungstengraphics.com>
  35   * @author Keith Whitwell <keith@tungstengraphics.com>
  36   */
  37
  38 #include "pipe/p_state.h"
  39 #include "util/u_draw.h"
  40 #include "util/u_framebuffer.h"
  41 #include "util/u_inlines.h"
  42 #include "util/u_math.h"
  43 #include "util/u_memory.h"
  44 #include "util/u_vbuf.h"
  45 #include "tgsi/tgsi_parse.h"
  46
  47 #include "cso_cache/cso_context.h"
  48 #include "cso_cache/cso_cache.h"
  49 #include "cso_cache/cso_hash.h"
  50 #include "cso_context.h"
  51
  52
  53 /**
  54  * Info related to samplers and sampler views.
  55  * We have one of these for fragment samplers and another for vertex samplers.
  56  */
  57 struct sampler_info
  58 {
  59    struct {
  60       void *samplers[PIPE_MAX_SAMPLERS];
  61       unsigned nr_samplers;
  62    } hw;
  63
  64    void *samplers[PIPE_MAX_SAMPLERS];
  65    unsigned nr_samplers;
  66
  67    void *samplers_saved[PIPE_MAX_SAMPLERS];
  68    unsigned nr_samplers_saved;
  69
  70    struct pipe_sampler_view *views[PIPE_MAX_SAMPLERS];
  71    unsigned nr_views;
  72
  73    struct pipe_sampler_view *views_saved[PIPE_MAX_SAMPLERS];
  74    unsigned nr_views_saved;
  75 };
  76
  77
  78
  79 struct cso_context {
  80    struct pipe_context *pipe;
  81    struct cso_cache *cache;
  82    struct u_vbuf *vbuf;
  83
  84    boolean has_geometry_shader;
  85    boolean has_streamout;
  86
  87    struct sampler_info samplers[PIPE_SHADER_TYPES];
  88
  89    uint nr_vertex_buffers;
  90    struct pipe_vertex_buffer vertex_buffers[PIPE_MAX_ATTRIBS];
  91
  92    uint nr_vertex_buffers_saved;
  93    struct pipe_vertex_buffer vertex_buffers_saved[PIPE_MAX_ATTRIBS];
  94
  95    unsigned nr_so_targets;
  96    struct pipe_stream_output_target *so_targets[PIPE_MAX_SO_BUFFERS];
  97
  98    unsigned nr_so_targets_saved;
  99    struct pipe_stream_output_target *so_targets_saved[PIPE_MAX_SO_BUFFERS];
 100
 101    /** Current and saved state.
 102     * The saved state is used as a 1-deep stack.
 103     */
 104    void *blend, *blend_saved;
 105    void *depth_stencil, *depth_stencil_saved;
 106    void *rasterizer, *rasterizer_saved;
 107    void *fragment_shader, *fragment_shader_saved, *geometry_shader;
 108    void *vertex_shader, *vertex_shader_saved, *geometry_shader_saved;
 109    void *velements, *velements_saved;
 110
 111    struct pipe_clip_state clip;
 112    struct pipe_clip_state clip_saved;
 113
 114    struct pipe_framebuffer_state fb, fb_saved;
 115    struct pipe_viewport_state vp, vp_saved;
 116    struct pipe_blend_color blend_color;
 117    unsigned sample_mask;
 118    struct pipe_stencil_ref stencil_ref, stencil_ref_saved;
 119 };
 120
 121
 122 static boolean delete_blend_state(struct cso_context *ctx, void *state)
 123 {
 124    struct cso_blend *cso = (struct cso_blend *)state;
 125
 126    if (ctx->blend == cso->data)
 127       return FALSE;
 128
 129    if (cso->delete_state)
 130       cso->delete_state(cso->context, cso->data);
 131    FREE(state);
 132    return TRUE;
 133 }
 134
 135 static boolean delete_depth_stencil_state(struct cso_context *ctx, void *state)
 136 {
 137    struct cso_depth_stencil_alpha *cso =
 138       (struct cso_depth_stencil_alpha *)state;
 139
 140    if (ctx->depth_stencil == cso->data)
 141       return FALSE;
 142
 143    if (cso->delete_state)
 144       cso->delete_state(cso->context, cso->data);
 145    FREE(state);
 146
 147    return TRUE;
 148 }
 149
 150 static boolean delete_sampler_state(struct cso_context *ctx, void *state)
 151 {
 152    struct cso_sampler *cso = (struct cso_sampler *)state;
 153    if (cso->delete_state)
 154       cso->delete_state(cso->context, cso->data);
 155    FREE(state);
 156    return TRUE;
 157 }
 158
 159 static boolean delete_rasterizer_state(struct cso_context *ctx, void *state)
 160 {
 161    struct cso_rasterizer *cso = (struct cso_rasterizer *)state;
 162
 163    if (ctx->rasterizer == cso->data)
 164       return FALSE;
 165    if (cso->delete_state)
 166       cso->delete_state(cso->context, cso->data);
 167    FREE(state);
 168    return TRUE;
 169 }
 170
 171 static boolean delete_vertex_elements(struct cso_context *ctx,
 172                                       void *state)
 173 {
 174    struct cso_velements *cso = (struct cso_velements *)state;
 175
 176    if (ctx->velements == cso->data)
 177       return FALSE;
 178
 179    if (cso->delete_state)
 180       cso->delete_state(cso->context, cso->data);
 181    FREE(state);
 182    return TRUE;
 183 }
 184
 185
 186 static INLINE boolean delete_cso(struct cso_context *ctx,
 187                                  void *state, enum cso_cache_type type)
 188 {
 189    switch (type) {
 190    case CSO_BLEND:
 191       return delete_blend_state(ctx, state);
 192    case CSO_SAMPLER:
 193       return delete_sampler_state(ctx, state);
 194    case CSO_DEPTH_STENCIL_ALPHA:
 195       return delete_depth_stencil_state(ctx, state);
 196    case CSO_RASTERIZER:
 197       return delete_rasterizer_state(ctx, state);
 198    case CSO_VELEMENTS:
 199       return delete_vertex_elements(ctx, state);
 200    default:
 201       assert(0);
 202       FREE(state);
 203    }
 204    return FALSE;
 205 }
 206
 207 static INLINE void
 208 sanitize_hash(struct cso_hash *hash, enum cso_cache_type type,
 209               int max_size, void *user_data)
 210 {
 211    struct cso_context *ctx = (struct cso_context *)user_data;
 212    /* if we're approach the maximum size, remove fourth of the entries
 213     * otherwise every subsequent call will go through the same */
 214    int hash_size = cso_hash_size(hash);
 215    int max_entries = (max_size > hash_size) ? max_size : hash_size;
 216    int to_remove =  (max_size < max_entries) * max_entries/4;
 217    struct cso_hash_iter iter = cso_hash_first_node(hash);
 218    if (hash_size > max_size)
 219       to_remove += hash_size - max_size;
 220    while (to_remove) {
 221       /*remove elements until we're good */
 222       /*fixme: currently we pick the nodes to remove at random*/
 223       void *cso = cso_hash_iter_data(iter);
 224       if (delete_cso(ctx, cso, type)) {
 225          iter = cso_hash_erase(hash, iter);
 226          --to_remove;
 227       } else
 228          iter = cso_hash_iter_next(iter);
 229    }
 230 }
 231
 232 static void cso_init_vbuf(struct cso_context *cso)
 233 {
 234    struct u_vbuf_caps caps;
 235
 236    u_vbuf_get_caps(cso->pipe->screen, &caps);
 237
 238    /* Install u_vbuf if there is anything unsupported. */
 239    if (!caps.buffer_offset_unaligned ||
 240        !caps.buffer_stride_unaligned ||
 241        !caps.velem_src_offset_unaligned ||
 242        !caps.format_fixed32 ||
 243        !caps.format_float16 ||
 244        !caps.format_float64 ||
 245        !caps.format_norm32 ||
 246        !caps.format_scaled32 ||
 247        !caps.user_vertex_buffers) {
 248       cso->vbuf = u_vbuf_create(cso->pipe, &caps);
 249    }
 250 }
 251
 252 struct cso_context *cso_create_context( struct pipe_context *pipe )
 253 {
 254    struct cso_context *ctx = CALLOC_STRUCT(cso_context);
 255    if (ctx == NULL)
 256       goto out;
 257
 258    assert(PIPE_MAX_SAMPLERS == PIPE_MAX_VERTEX_SAMPLERS);
 259
 260    ctx->cache = cso_cache_create();
 261    if (ctx->cache == NULL)
 262       goto out;
 263    cso_cache_set_sanitize_callback(ctx->cache,
 264                                    sanitize_hash,
 265                                    ctx);
 266
 267    ctx->pipe = pipe;
 268
 269    cso_init_vbuf(ctx);
 270
 271    /* Enable for testing: */
 272    if (0) cso_set_maximum_cache_size( ctx->cache, 4 );
 273
 274    if (pipe->screen->get_shader_param(pipe->screen, PIPE_SHADER_GEOMETRY,
 275                                 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
 276       ctx->has_geometry_shader = TRUE;
 277    }
 278    if (pipe->screen->get_param(pipe->screen,
 279                                PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS) != 0) {
 280       ctx->has_streamout = TRUE;
 281    }
 282
 283    return ctx;
 284
 285 out:
 286    cso_destroy_context( ctx );
 287    return NULL;
 288 }
 289
 290 /**
 291  * Prior to context destruction, this function unbinds all state objects.
 292  */
 293 void cso_release_all( struct cso_context *ctx )
 294 {
 295    unsigned i, shader;
 296
 297    if (ctx->pipe) {
 298       ctx->pipe->bind_blend_state( ctx->pipe, NULL );
 299       ctx->pipe->bind_rasterizer_state( ctx->pipe, NULL );
 300       ctx->pipe->bind_fragment_sampler_states( ctx->pipe, 0, NULL );
 301       if (ctx->pipe->bind_vertex_sampler_states)
 302          ctx->pipe->bind_vertex_sampler_states(ctx->pipe, 0, NULL);
 303       ctx->pipe->bind_depth_stencil_alpha_state( ctx->pipe, NULL );
 304       ctx->pipe->bind_fs_state( ctx->pipe, NULL );
 305       ctx->pipe->bind_vs_state( ctx->pipe, NULL );
 306       ctx->pipe->bind_vertex_elements_state( ctx->pipe, NULL );
 307       ctx->pipe->set_fragment_sampler_views(ctx->pipe, 0, NULL);
 308       if (ctx->pipe->set_vertex_sampler_views)
 309          ctx->pipe->set_vertex_sampler_views(ctx->pipe, 0, NULL);
 310       if (ctx->pipe->set_stream_output_targets)
 311          ctx->pipe->set_stream_output_targets(ctx->pipe, 0, NULL, 0);
 312    }
 313
 314    /* free fragment samplers, views */
 315    for (shader = 0; shader < Elements(ctx->samplers); shader++) {
 316       struct sampler_info *info = &ctx->samplers[shader];
 317       for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 318          pipe_sampler_view_reference(&info->views[i], NULL);
 319          pipe_sampler_view_reference(&info->views_saved[i], NULL);
 320       }
 321    }
 322
 323    util_unreference_framebuffer_state(&ctx->fb);
 324    util_unreference_framebuffer_state(&ctx->fb_saved);
 325
 326    util_copy_vertex_buffers(ctx->vertex_buffers,
 327                             &ctx->nr_vertex_buffers,
 328                             NULL, 0);
 329    util_copy_vertex_buffers(ctx->vertex_buffers_saved,
 330                             &ctx->nr_vertex_buffers_saved,
 331                             NULL, 0);
 332
 333    for (i = 0; i < PIPE_MAX_SO_BUFFERS; i++) {
 334       pipe_so_target_reference(&ctx->so_targets[i], NULL);
 335       pipe_so_target_reference(&ctx->so_targets_saved[i], NULL);
 336    }
 337
 338    if (ctx->cache) {
 339       cso_cache_delete( ctx->cache );
 340       ctx->cache = NULL;
 341    }
 342 }
 343
 344
 345 /**
 346  * Free the CSO context.  NOTE: the state tracker should have previously called
 347  * cso_release_all().
 348  */
 349 void cso_destroy_context( struct cso_context *ctx )
 350 {
 351    if (ctx) {
 352       if (ctx->vbuf)
 353          u_vbuf_destroy(ctx->vbuf);
 354       FREE( ctx );
 355    }
 356 }
 357
 358
 359 /* Those function will either find the state of the given template
 360  * in the cache or they will create a new state from the given
 361  * template, insert it in the cache and return it.
 362  */
 363
 364 /*
 365  * If the driver returns 0 from the create method then they will assign
 366  * the data member of the cso to be the template itself.
 367  */
 368
 369 enum pipe_error cso_set_blend(struct cso_context *ctx,
 370                               const struct pipe_blend_state *templ)
 371 {
 372    unsigned key_size, hash_key;
 373    struct cso_hash_iter iter;
 374    void *handle;
 375
 376    key_size = templ->independent_blend_enable ?
 377       sizeof(struct pipe_blend_state) :
 378       (char *)&(templ->rt[1]) - (char *)templ;
 379    hash_key = cso_construct_key((void*)templ, key_size);
 380    iter = cso_find_state_template(ctx->cache, hash_key, CSO_BLEND,
 381                                   (void*)templ, key_size);
 382
 383    if (cso_hash_iter_is_null(iter)) {
 384       struct cso_blend *cso = MALLOC(sizeof(struct cso_blend));
 385       if (!cso)
 386          return PIPE_ERROR_OUT_OF_MEMORY;
 387
 388       memset(&cso->state, 0, sizeof cso->state);
 389       memcpy(&cso->state, templ, key_size);
 390       cso->data = ctx->pipe->create_blend_state(ctx->pipe, &cso->state);
 391       cso->delete_state = (cso_state_callback)ctx->pipe->delete_blend_state;
 392       cso->context = ctx->pipe;
 393
 394       iter = cso_insert_state(ctx->cache, hash_key, CSO_BLEND, cso);
 395       if (cso_hash_iter_is_null(iter)) {
 396          FREE(cso);
 397          return PIPE_ERROR_OUT_OF_MEMORY;
 398       }
 399
 400       handle = cso->data;
 401    }
 402    else {
 403       handle = ((struct cso_blend *)cso_hash_iter_data(iter))->data;
 404    }
 405
 406    if (ctx->blend != handle) {
 407       ctx->blend = handle;
 408       ctx->pipe->bind_blend_state(ctx->pipe, handle);
 409    }
 410    return PIPE_OK;
 411 }
 412
 413 void cso_save_blend(struct cso_context *ctx)
 414 {
 415    assert(!ctx->blend_saved);
 416    ctx->blend_saved = ctx->blend;
 417 }
 418
 419 void cso_restore_blend(struct cso_context *ctx)
 420 {
 421    if (ctx->blend != ctx->blend_saved) {
 422       ctx->blend = ctx->blend_saved;
 423       ctx->pipe->bind_blend_state(ctx->pipe, ctx->blend_saved);
 424    }
 425    ctx->blend_saved = NULL;
 426 }
 427
 428
 429
 430 enum pipe_error
 431 cso_set_depth_stencil_alpha(struct cso_context *ctx,
 432                             const struct pipe_depth_stencil_alpha_state *templ)
 433 {
 434    unsigned key_size = sizeof(struct pipe_depth_stencil_alpha_state);
 435    unsigned hash_key = cso_construct_key((void*)templ, key_size);
 436    struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
 437                                                        hash_key,
 438                                                        CSO_DEPTH_STENCIL_ALPHA,
 439                                                        (void*)templ, key_size);
 440    void *handle;
 441
 442    if (cso_hash_iter_is_null(iter)) {
 443       struct cso_depth_stencil_alpha *cso =
 444          MALLOC(sizeof(struct cso_depth_stencil_alpha));
 445       if (!cso)
 446          return PIPE_ERROR_OUT_OF_MEMORY;
 447
 448       memcpy(&cso->state, templ, sizeof(*templ));
 449       cso->data = ctx->pipe->create_depth_stencil_alpha_state(ctx->pipe,
 450                                                               &cso->state);
 451       cso->delete_state =
 452          (cso_state_callback)ctx->pipe->delete_depth_stencil_alpha_state;
 453       cso->context = ctx->pipe;
 454
 455       iter = cso_insert_state(ctx->cache, hash_key,
 456                               CSO_DEPTH_STENCIL_ALPHA, cso);
 457       if (cso_hash_iter_is_null(iter)) {
 458          FREE(cso);
 459          return PIPE_ERROR_OUT_OF_MEMORY;
 460       }
 461
 462       handle = cso->data;
 463    }
 464    else {
 465       handle = ((struct cso_depth_stencil_alpha *)
 466                 cso_hash_iter_data(iter))->data;
 467    }
 468
 469    if (ctx->depth_stencil != handle) {
 470       ctx->depth_stencil = handle;
 471       ctx->pipe->bind_depth_stencil_alpha_state(ctx->pipe, handle);
 472    }
 473    return PIPE_OK;
 474 }
 475
 476 void cso_save_depth_stencil_alpha(struct cso_context *ctx)
 477 {
 478    assert(!ctx->depth_stencil_saved);
 479    ctx->depth_stencil_saved = ctx->depth_stencil;
 480 }
 481
 482 void cso_restore_depth_stencil_alpha(struct cso_context *ctx)
 483 {
 484    if (ctx->depth_stencil != ctx->depth_stencil_saved) {
 485       ctx->depth_stencil = ctx->depth_stencil_saved;
 486       ctx->pipe->bind_depth_stencil_alpha_state(ctx->pipe,
 487                                                 ctx->depth_stencil_saved);
 488    }
 489    ctx->depth_stencil_saved = NULL;
 490 }
 491
 492
 493
 494 enum pipe_error cso_set_rasterizer(struct cso_context *ctx,
 495                                    const struct pipe_rasterizer_state *templ)
 496 {
 497    unsigned key_size = sizeof(struct pipe_rasterizer_state);
 498    unsigned hash_key = cso_construct_key((void*)templ, key_size);
 499    struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
 500                                                        hash_key,
 501                                                        CSO_RASTERIZER,
 502                                                        (void*)templ, key_size);
 503    void *handle = NULL;
 504
 505    if (cso_hash_iter_is_null(iter)) {
 506       struct cso_rasterizer *cso = MALLOC(sizeof(struct cso_rasterizer));
 507       if (!cso)
 508          return PIPE_ERROR_OUT_OF_MEMORY;
 509
 510       memcpy(&cso->state, templ, sizeof(*templ));
 511       cso->data = ctx->pipe->create_rasterizer_state(ctx->pipe, &cso->state);
 512       cso->delete_state =
 513          (cso_state_callback)ctx->pipe->delete_rasterizer_state;
 514       cso->context = ctx->pipe;
 515
 516       iter = cso_insert_state(ctx->cache, hash_key, CSO_RASTERIZER, cso);
 517       if (cso_hash_iter_is_null(iter)) {
 518          FREE(cso);
 519          return PIPE_ERROR_OUT_OF_MEMORY;
 520       }
 521
 522       handle = cso->data;
 523    }
 524    else {
 525       handle = ((struct cso_rasterizer *)cso_hash_iter_data(iter))->data;
 526    }
 527
 528    if (ctx->rasterizer != handle) {
 529       ctx->rasterizer = handle;
 530       ctx->pipe->bind_rasterizer_state(ctx->pipe, handle);
 531    }
 532    return PIPE_OK;
 533 }
 534
 535 void cso_save_rasterizer(struct cso_context *ctx)
 536 {
 537    assert(!ctx->rasterizer_saved);
 538    ctx->rasterizer_saved = ctx->rasterizer;
 539 }
 540
 541 void cso_restore_rasterizer(struct cso_context *ctx)
 542 {
 543    if (ctx->rasterizer != ctx->rasterizer_saved) {
 544       ctx->rasterizer = ctx->rasterizer_saved;
 545       ctx->pipe->bind_rasterizer_state(ctx->pipe, ctx->rasterizer_saved);
 546    }
 547    ctx->rasterizer_saved = NULL;
 548 }
 549
 550
 551
 552 enum pipe_error cso_set_fragment_shader_handle(struct cso_context *ctx,
 553                                                void *handle )
 554 {
 555    if (ctx->fragment_shader != handle) {
 556       ctx->fragment_shader = handle;
 557       ctx->pipe->bind_fs_state(ctx->pipe, handle);
 558    }
 559    return PIPE_OK;
 560 }
 561
 562 void cso_delete_fragment_shader(struct cso_context *ctx, void *handle )
 563 {
 564    if (handle == ctx->fragment_shader) {
 565       /* unbind before deleting */
 566       ctx->pipe->bind_fs_state(ctx->pipe, NULL);
 567       ctx->fragment_shader = NULL;
 568    }
 569    ctx->pipe->delete_fs_state(ctx->pipe, handle);
 570 }
 571
 572 void cso_save_fragment_shader(struct cso_context *ctx)
 573 {
 574    assert(!ctx->fragment_shader_saved);
 575    ctx->fragment_shader_saved = ctx->fragment_shader;
 576 }
 577
 578 void cso_restore_fragment_shader(struct cso_context *ctx)
 579 {
 580    if (ctx->fragment_shader_saved != ctx->fragment_shader) {
 581       ctx->pipe->bind_fs_state(ctx->pipe, ctx->fragment_shader_saved);
 582       ctx->fragment_shader = ctx->fragment_shader_saved;
 583    }
 584    ctx->fragment_shader_saved = NULL;
 585 }
 586
 587
 588 enum pipe_error cso_set_vertex_shader_handle(struct cso_context *ctx,
 589                                              void *handle )
 590 {
 591    if (ctx->vertex_shader != handle) {
 592       ctx->vertex_shader = handle;
 593       ctx->pipe->bind_vs_state(ctx->pipe, handle);
 594    }
 595    return PIPE_OK;
 596 }
 597
 598 void cso_delete_vertex_shader(struct cso_context *ctx, void *handle )
 599 {
 600    if (handle == ctx->vertex_shader) {
 601       /* unbind before deleting */
 602       ctx->pipe->bind_vs_state(ctx->pipe, NULL);
 603       ctx->vertex_shader = NULL;
 604    }
 605    ctx->pipe->delete_vs_state(ctx->pipe, handle);
 606 }
 607
 608 void cso_save_vertex_shader(struct cso_context *ctx)
 609 {
 610    assert(!ctx->vertex_shader_saved);
 611    ctx->vertex_shader_saved = ctx->vertex_shader;
 612 }
 613
 614 void cso_restore_vertex_shader(struct cso_context *ctx)
 615 {
 616    if (ctx->vertex_shader_saved != ctx->vertex_shader) {
 617       ctx->pipe->bind_vs_state(ctx->pipe, ctx->vertex_shader_saved);
 618       ctx->vertex_shader = ctx->vertex_shader_saved;
 619    }
 620    ctx->vertex_shader_saved = NULL;
 621 }
 622
 623
 624 enum pipe_error cso_set_framebuffer(struct cso_context *ctx,
 625                                     const struct pipe_framebuffer_state *fb)
 626 {
 627    if (memcmp(&ctx->fb, fb, sizeof(*fb)) != 0) {
 628       util_copy_framebuffer_state(&ctx->fb, fb);
 629       ctx->pipe->set_framebuffer_state(ctx->pipe, fb);
 630    }
 631    return PIPE_OK;
 632 }
 633
 634 void cso_save_framebuffer(struct cso_context *ctx)
 635 {
 636    util_copy_framebuffer_state(&ctx->fb_saved, &ctx->fb);
 637 }
 638
 639 void cso_restore_framebuffer(struct cso_context *ctx)
 640 {
 641    if (memcmp(&ctx->fb, &ctx->fb_saved, sizeof(ctx->fb))) {
 642       util_copy_framebuffer_state(&ctx->fb, &ctx->fb_saved);
 643       ctx->pipe->set_framebuffer_state(ctx->pipe, &ctx->fb);
 644       util_unreference_framebuffer_state(&ctx->fb_saved);
 645    }
 646 }
 647
 648
 649 enum pipe_error cso_set_viewport(struct cso_context *ctx,
 650                                  const struct pipe_viewport_state *vp)
 651 {
 652    if (memcmp(&ctx->vp, vp, sizeof(*vp))) {
 653       ctx->vp = *vp;
 654       ctx->pipe->set_viewport_state(ctx->pipe, vp);
 655    }
 656    return PIPE_OK;
 657 }
 658
 659 void cso_save_viewport(struct cso_context *ctx)
 660 {
 661    ctx->vp_saved = ctx->vp;
 662 }
 663
 664
 665 void cso_restore_viewport(struct cso_context *ctx)
 666 {
 667    if (memcmp(&ctx->vp, &ctx->vp_saved, sizeof(ctx->vp))) {
 668       ctx->vp = ctx->vp_saved;
 669       ctx->pipe->set_viewport_state(ctx->pipe, &ctx->vp);
 670    }
 671 }
 672
 673
 674 enum pipe_error cso_set_blend_color(struct cso_context *ctx,
 675                                     const struct pipe_blend_color *bc)
 676 {
 677    if (memcmp(&ctx->blend_color, bc, sizeof(ctx->blend_color))) {
 678       ctx->blend_color = *bc;
 679       ctx->pipe->set_blend_color(ctx->pipe, bc);
 680    }
 681    return PIPE_OK;
 682 }
 683
 684 enum pipe_error cso_set_sample_mask(struct cso_context *ctx,
 685                                     unsigned sample_mask)
 686 {
 687    if (ctx->sample_mask != sample_mask) {
 688       ctx->sample_mask = sample_mask;
 689       ctx->pipe->set_sample_mask(ctx->pipe, sample_mask);
 690    }
 691    return PIPE_OK;
 692 }
 693
 694 enum pipe_error cso_set_stencil_ref(struct cso_context *ctx,
 695                                     const struct pipe_stencil_ref *sr)
 696 {
 697    if (memcmp(&ctx->stencil_ref, sr, sizeof(ctx->stencil_ref))) {
 698       ctx->stencil_ref = *sr;
 699       ctx->pipe->set_stencil_ref(ctx->pipe, sr);
 700    }
 701    return PIPE_OK;
 702 }
 703
 704 void cso_save_stencil_ref(struct cso_context *ctx)
 705 {
 706    ctx->stencil_ref_saved = ctx->stencil_ref;
 707 }
 708
 709
 710 void cso_restore_stencil_ref(struct cso_context *ctx)
 711 {
 712    if (memcmp(&ctx->stencil_ref, &ctx->stencil_ref_saved,
 713               sizeof(ctx->stencil_ref))) {
 714       ctx->stencil_ref = ctx->stencil_ref_saved;
 715       ctx->pipe->set_stencil_ref(ctx->pipe, &ctx->stencil_ref);
 716    }
 717 }
 718
 719 enum pipe_error cso_set_geometry_shader_handle(struct cso_context *ctx,
 720                                                void *handle)
 721 {
 722    assert(ctx->has_geometry_shader || !handle);
 723
 724    if (ctx->has_geometry_shader && ctx->geometry_shader != handle) {
 725       ctx->geometry_shader = handle;
 726       ctx->pipe->bind_gs_state(ctx->pipe, handle);
 727    }
 728    return PIPE_OK;
 729 }
 730
 731 void cso_delete_geometry_shader(struct cso_context *ctx, void *handle)
 732 {
 733     if (handle == ctx->geometry_shader) {
 734       /* unbind before deleting */
 735       ctx->pipe->bind_gs_state(ctx->pipe, NULL);
 736       ctx->geometry_shader = NULL;
 737    }
 738    ctx->pipe->delete_gs_state(ctx->pipe, handle);
 739 }
 740
 741 void cso_save_geometry_shader(struct cso_context *ctx)
 742 {
 743    if (!ctx->has_geometry_shader) {
 744       return;
 745    }
 746
 747    assert(!ctx->geometry_shader_saved);
 748    ctx->geometry_shader_saved = ctx->geometry_shader;
 749 }
 750
 751 void cso_restore_geometry_shader(struct cso_context *ctx)
 752 {
 753    if (!ctx->has_geometry_shader) {
 754       return;
 755    }
 756
 757    if (ctx->geometry_shader_saved != ctx->geometry_shader) {
 758       ctx->pipe->bind_gs_state(ctx->pipe, ctx->geometry_shader_saved);
 759       ctx->geometry_shader = ctx->geometry_shader_saved;
 760    }
 761    ctx->geometry_shader_saved = NULL;
 762 }
 763
 764 /* clip state */
 765
 766 static INLINE void
 767 clip_state_cpy(struct pipe_clip_state *dst,
 768                const struct pipe_clip_state *src)
 769 {
 770    memcpy(dst->ucp, src->ucp, sizeof(dst->ucp));
 771 }
 772
 773 static INLINE int
 774 clip_state_cmp(const struct pipe_clip_state *a,
 775                const struct pipe_clip_state *b)
 776 {
 777    return memcmp(a->ucp, b->ucp, sizeof(a->ucp));
 778 }
 779
 780 void
 781 cso_set_clip(struct cso_context *ctx,
 782              const struct pipe_clip_state *clip)
 783 {
 784    if (clip_state_cmp(&ctx->clip, clip)) {
 785       clip_state_cpy(&ctx->clip, clip);
 786       ctx->pipe->set_clip_state(ctx->pipe, clip);
 787    }
 788 }
 789
 790 void
 791 cso_save_clip(struct cso_context *ctx)
 792 {
 793    clip_state_cpy(&ctx->clip_saved, &ctx->clip);
 794 }
 795
 796 void
 797 cso_restore_clip(struct cso_context *ctx)
 798 {
 799    if (clip_state_cmp(&ctx->clip, &ctx->clip_saved)) {
 800       clip_state_cpy(&ctx->clip, &ctx->clip_saved);
 801       ctx->pipe->set_clip_state(ctx->pipe, &ctx->clip_saved);
 802    }
 803 }
 804
 805 enum pipe_error
 806 cso_set_vertex_elements(struct cso_context *ctx,
 807                         unsigned count,
 808                         const struct pipe_vertex_element *states)
 809 {
 810    struct u_vbuf *vbuf = ctx->vbuf;
 811    unsigned key_size, hash_key;
 812    struct cso_hash_iter iter;
 813    void *handle;
 814    struct cso_velems_state velems_state;
 815
 816    if (vbuf) {
 817       u_vbuf_set_vertex_elements(vbuf, count, states);
 818       return PIPE_OK;
 819    }
 820
 821    /* Need to include the count into the stored state data too.
 822     * Otherwise first few count pipe_vertex_elements could be identical
 823     * even if count is different, and there's no guarantee the hash would
 824     * be different in that case neither.
 825     */
 826    key_size = sizeof(struct pipe_vertex_element) * count + sizeof(unsigned);
 827    velems_state.count = count;
 828    memcpy(velems_state.velems, states,
 829           sizeof(struct pipe_vertex_element) * count);
 830    hash_key = cso_construct_key((void*)&velems_state, key_size);
 831    iter = cso_find_state_template(ctx->cache, hash_key, CSO_VELEMENTS,
 832                                   (void*)&velems_state, key_size);
 833
 834    if (cso_hash_iter_is_null(iter)) {
 835       struct cso_velements *cso = MALLOC(sizeof(struct cso_velements));
 836       if (!cso)
 837          return PIPE_ERROR_OUT_OF_MEMORY;
 838
 839       memcpy(&cso->state, &velems_state, key_size);
 840       cso->data = ctx->pipe->create_vertex_elements_state(ctx->pipe, count,
 841                                                       &cso->state.velems[0]);
 842       cso->delete_state =
 843          (cso_state_callback) ctx->pipe->delete_vertex_elements_state;
 844       cso->context = ctx->pipe;
 845
 846       iter = cso_insert_state(ctx->cache, hash_key, CSO_VELEMENTS, cso);
 847       if (cso_hash_iter_is_null(iter)) {
 848          FREE(cso);
 849          return PIPE_ERROR_OUT_OF_MEMORY;
 850       }
 851
 852       handle = cso->data;
 853    }
 854    else {
 855       handle = ((struct cso_velements *)cso_hash_iter_data(iter))->data;
 856    }
 857
 858    if (ctx->velements != handle) {
 859       ctx->velements = handle;
 860       ctx->pipe->bind_vertex_elements_state(ctx->pipe, handle);
 861    }
 862    return PIPE_OK;
 863 }
 864
 865 void cso_save_vertex_elements(struct cso_context *ctx)
 866 {
 867    struct u_vbuf *vbuf = ctx->vbuf;
 868
 869    if (vbuf) {
 870       u_vbuf_save_vertex_elements(vbuf);
 871       return;
 872    }
 873
 874    assert(!ctx->velements_saved);
 875    ctx->velements_saved = ctx->velements;
 876 }
 877
 878 void cso_restore_vertex_elements(struct cso_context *ctx)
 879 {
 880    struct u_vbuf *vbuf = ctx->vbuf;
 881
 882    if (vbuf) {
 883       u_vbuf_restore_vertex_elements(vbuf);
 884       return;
 885    }
 886
 887    if (ctx->velements != ctx->velements_saved) {
 888       ctx->velements = ctx->velements_saved;
 889       ctx->pipe->bind_vertex_elements_state(ctx->pipe, ctx->velements_saved);
 890    }
 891    ctx->velements_saved = NULL;
 892 }
 893
 894 /* vertex buffers */
 895
 896 void cso_set_vertex_buffers(struct cso_context *ctx,
 897                             unsigned count,
 898                             const struct pipe_vertex_buffer *buffers)
 899 {
 900    struct u_vbuf *vbuf = ctx->vbuf;
 901
 902    if (vbuf) {
 903       u_vbuf_set_vertex_buffers(vbuf, count, buffers);
 904       return;
 905    }
 906
 907    if (count != ctx->nr_vertex_buffers ||
 908        memcmp(buffers, ctx->vertex_buffers,
 909               sizeof(struct pipe_vertex_buffer) * count) != 0) {
 910       util_copy_vertex_buffers(ctx->vertex_buffers, &ctx->nr_vertex_buffers,
 911                                buffers, count);
 912       ctx->pipe->set_vertex_buffers(ctx->pipe, count, buffers);
 913    }
 914 }
 915
 916 void cso_save_vertex_buffers(struct cso_context *ctx)
 917 {
 918    struct u_vbuf *vbuf = ctx->vbuf;
 919
 920    if (vbuf) {
 921       u_vbuf_save_vertex_buffers(vbuf);
 922       return;
 923    }
 924
 925    util_copy_vertex_buffers(ctx->vertex_buffers_saved,
 926                             &ctx->nr_vertex_buffers_saved,
 927                             ctx->vertex_buffers,
 928                             ctx->nr_vertex_buffers);
 929 }
 930
 931 void cso_restore_vertex_buffers(struct cso_context *ctx)
 932 {
 933    unsigned i;
 934    struct u_vbuf *vbuf = ctx->vbuf;
 935
 936    if (vbuf) {
 937       u_vbuf_restore_vertex_buffers(vbuf);
 938       return;
 939    }
 940
 941    util_copy_vertex_buffers(ctx->vertex_buffers,
 942                             &ctx->nr_vertex_buffers,
 943                             ctx->vertex_buffers_saved,
 944                             ctx->nr_vertex_buffers_saved);
 945
 946    for (i = 0; i < ctx->nr_vertex_buffers_saved; i++) {
 947       pipe_resource_reference(&ctx->vertex_buffers_saved[i].buffer, NULL);
 948    }
 949    ctx->nr_vertex_buffers_saved = 0;
 950
 951    ctx->pipe->set_vertex_buffers(ctx->pipe, ctx->nr_vertex_buffers,
 952                                  ctx->vertex_buffers);
 953 }
 954
 955
 956 /**************** fragment/vertex sampler view state *************************/
 957
 958 static enum pipe_error
 959 single_sampler(struct cso_context *ctx,
 960                struct sampler_info *info,
 961                unsigned idx,
 962                const struct pipe_sampler_state *templ)
 963 {
 964    void *handle = NULL;
 965
 966    if (templ != NULL) {
 967       unsigned key_size = sizeof(struct pipe_sampler_state);
 968       unsigned hash_key = cso_construct_key((void*)templ, key_size);
 969       struct cso_hash_iter iter =
 970          cso_find_state_template(ctx->cache,
 971                                  hash_key, CSO_SAMPLER,
 972                                  (void *) templ, key_size);
 973
 974       if (cso_hash_iter_is_null(iter)) {
 975          struct cso_sampler *cso = MALLOC(sizeof(struct cso_sampler));
 976          if (!cso)
 977             return PIPE_ERROR_OUT_OF_MEMORY;
 978
 979          memcpy(&cso->state, templ, sizeof(*templ));
 980          cso->data = ctx->pipe->create_sampler_state(ctx->pipe, &cso->state);
 981          cso->delete_state =
 982             (cso_state_callback) ctx->pipe->delete_sampler_state;
 983          cso->context = ctx->pipe;
 984
 985          iter = cso_insert_state(ctx->cache, hash_key, CSO_SAMPLER, cso);
 986          if (cso_hash_iter_is_null(iter)) {
 987             FREE(cso);
 988             return PIPE_ERROR_OUT_OF_MEMORY;
 989          }
 990
 991          handle = cso->data;
 992       }
 993       else {
 994          handle = ((struct cso_sampler *)cso_hash_iter_data(iter))->data;
 995       }
 996    }
 997
 998    info->samplers[idx] = handle;
 999
1000    return PIPE_OK;
1001 }
1002
1003 enum pipe_error
1004 cso_single_sampler(struct cso_context *ctx,
1005                    unsigned shader_stage,
1006                    unsigned idx,
1007                    const struct pipe_sampler_state *templ)
1008 {
1009    return single_sampler(ctx, &ctx->samplers[shader_stage], idx, templ);
1010 }
1011
1012
1013
1014 static void
1015 single_sampler_done(struct cso_context *ctx, unsigned shader_stage)
1016 {
1017    struct sampler_info *info = &ctx->samplers[shader_stage];
1018    unsigned i;
1019
1020    /* find highest non-null sampler */
1021    for (i = PIPE_MAX_SAMPLERS; i > 0; i--) {
1022       if (info->samplers[i - 1] != NULL)
1023          break;
1024    }
1025
1026    info->nr_samplers = i;
1027
1028    if (info->hw.nr_samplers != info->nr_samplers ||
1029        memcmp(info->hw.samplers,
1030               info->samplers,
1031               info->nr_samplers * sizeof(void *)) != 0)
1032    {
1033       memcpy(info->hw.samplers,
1034              info->samplers,
1035              info->nr_samplers * sizeof(void *));
1036       info->hw.nr_samplers = info->nr_samplers;
1037
1038       switch (shader_stage) {
1039       case PIPE_SHADER_FRAGMENT:
1040          ctx->pipe->bind_fragment_sampler_states(ctx->pipe,
1041                                                  info->nr_samplers,
1042                                                  info->samplers);
1043          break;
1044       case PIPE_SHADER_VERTEX:
1045          ctx->pipe->bind_vertex_sampler_states(ctx->pipe,
1046                                                info->nr_samplers,
1047                                                info->samplers);
1048          break;
1049       case PIPE_SHADER_GEOMETRY:
1050          ctx->pipe->bind_geometry_sampler_states(ctx->pipe,
1051                                                info->nr_samplers,
1052                                                info->samplers);
1053          break;
1054       default:
1055          assert(!"bad shader type in single_sampler_done()");
1056       }
1057    }
1058 }
1059
1060 void
1061 cso_single_sampler_done(struct cso_context *ctx, unsigned shader_stage)
1062 {
1063    single_sampler_done(ctx, shader_stage);
1064 }
1065
1066
1067 /*
1068  * If the function encouters any errors it will return the
1069  * last one. Done to always try to set as many samplers
1070  * as possible.
1071  */
1072 enum pipe_error
1073 cso_set_samplers(struct cso_context *ctx,
1074                  unsigned shader_stage,
1075                  unsigned nr,
1076                  const struct pipe_sampler_state **templates)
1077 {
1078    struct sampler_info *info = &ctx->samplers[shader_stage];
1079    unsigned i;
1080    enum pipe_error temp, error = PIPE_OK;
1081
1082    /* TODO: fastpath
1083     */
1084
1085    for (i = 0; i < nr; i++) {
1086       temp = single_sampler(ctx, info, i, templates[i]);
1087       if (temp != PIPE_OK)
1088          error = temp;
1089    }
1090
1091    for ( ; i < info->nr_samplers; i++) {
1092       temp = single_sampler(ctx, info, i, NULL);
1093       if (temp != PIPE_OK)
1094          error = temp;
1095    }
1096
1097    single_sampler_done(ctx, shader_stage);
1098
1099    return error;
1100 }
1101
1102 void
1103 cso_save_samplers(struct cso_context *ctx, unsigned shader_stage)
1104 {
1105    struct sampler_info *info = &ctx->samplers[shader_stage];
1106    info->nr_samplers_saved = info->nr_samplers;
1107    memcpy(info->samplers_saved, info->samplers, sizeof(info->samplers));
1108 }
1109
1110
1111 void
1112 cso_restore_samplers(struct cso_context *ctx, unsigned shader_stage)
1113 {
1114    struct sampler_info *info = &ctx->samplers[shader_stage];
1115    info->nr_samplers = info->nr_samplers_saved;
1116    memcpy(info->samplers, info->samplers_saved, sizeof(info->samplers));
1117    single_sampler_done(ctx, shader_stage);
1118 }
1119
1120
1121 void
1122 cso_set_sampler_views(struct cso_context *ctx,
1123                       unsigned shader_stage,
1124                       unsigned count,
1125                       struct pipe_sampler_view **views)
1126 {
1127    struct sampler_info *info = &ctx->samplers[shader_stage];
1128    unsigned i;
1129
1130    /* reference new views */
1131    for (i = 0; i < count; i++) {
1132       pipe_sampler_view_reference(&info->views[i], views[i]);
1133    }
1134    /* unref extra old views, if any */
1135    for (; i < info->nr_views; i++) {
1136       pipe_sampler_view_reference(&info->views[i], NULL);
1137    }
1138
1139    info->nr_views = count;
1140
1141    /* bind the new sampler views */
1142    switch (shader_stage) {
1143    case PIPE_SHADER_FRAGMENT:
1144       ctx->pipe->set_fragment_sampler_views(ctx->pipe, count, info->views);
1145       break;
1146    case PIPE_SHADER_VERTEX:
1147       ctx->pipe->set_vertex_sampler_views(ctx->pipe, count, info->views);
1148       break;
1149    case PIPE_SHADER_GEOMETRY:
1150       ctx->pipe->set_geometry_sampler_views(ctx->pipe, count, info->views);
1151       break;
1152    default:
1153       assert(!"bad shader type in cso_set_sampler_views()");
1154    }
1155 }
1156
1157
1158 void
1159 cso_save_sampler_views(struct cso_context *ctx, unsigned shader_stage)
1160 {
1161    struct sampler_info *info = &ctx->samplers[shader_stage];
1162    unsigned i;
1163
1164    info->nr_views_saved = info->nr_views;
1165
1166    for (i = 0; i < info->nr_views; i++) {
1167       assert(!info->views_saved[i]);
1168       pipe_sampler_view_reference(&info->views_saved[i], info->views[i]);
1169    }
1170 }
1171
1172
1173 void
1174 cso_restore_sampler_views(struct cso_context *ctx, unsigned shader_stage)
1175 {
1176    struct sampler_info *info = &ctx->samplers[shader_stage];
1177    unsigned i, nr_saved = info->nr_views_saved;
1178
1179    for (i = 0; i < nr_saved; i++) {
1180       pipe_sampler_view_reference(&info->views[i], NULL);
1181       /* move the reference from one pointer to another */
1182       info->views[i] = info->views_saved[i];
1183       info->views_saved[i] = NULL;
1184    }
1185    for (; i < info->nr_views; i++) {
1186       pipe_sampler_view_reference(&info->views[i], NULL);
1187    }
1188
1189    /* bind the old/saved sampler views */
1190    switch (shader_stage) {
1191    case PIPE_SHADER_FRAGMENT:
1192       ctx->pipe->set_fragment_sampler_views(ctx->pipe, nr_saved, info->views);
1193       break;
1194    case PIPE_SHADER_VERTEX:
1195       ctx->pipe->set_vertex_sampler_views(ctx->pipe, nr_saved, info->views);
1196       break;
1197    case PIPE_SHADER_GEOMETRY:
1198       ctx->pipe->set_geometry_sampler_views(ctx->pipe, nr_saved, info->views);
1199       break;
1200    default:
1201       assert(!"bad shader type in cso_restore_sampler_views()");
1202    }
1203
1204    info->nr_views = nr_saved;
1205    info->nr_views_saved = 0;
1206 }
1207
1208
1209 void
1210 cso_set_stream_outputs(struct cso_context *ctx,
1211                        unsigned num_targets,
1212                        struct pipe_stream_output_target **targets,
1213                        unsigned append_bitmask)
1214 {
1215    struct pipe_context *pipe = ctx->pipe;
1216    uint i;
1217
1218    if (!ctx->has_streamout) {
1219       assert(num_targets == 0);
1220       return;
1221    }
1222
1223    if (ctx->nr_so_targets == 0 && num_targets == 0) {
1224       /* Nothing to do. */
1225       return;
1226    }
1227
1228    /* reference new targets */
1229    for (i = 0; i < num_targets; i++) {
1230       pipe_so_target_reference(&ctx->so_targets[i], targets[i]);
1231    }
1232    /* unref extra old targets, if any */
1233    for (; i < ctx->nr_so_targets; i++) {
1234       pipe_so_target_reference(&ctx->so_targets[i], NULL);
1235    }
1236
1237    pipe->set_stream_output_targets(pipe, num_targets, targets,
1238                                    append_bitmask);
1239    ctx->nr_so_targets = num_targets;
1240 }
1241
1242 void
1243 cso_save_stream_outputs(struct cso_context *ctx)
1244 {
1245    uint i;
1246
1247    if (!ctx->has_streamout) {
1248       return;
1249    }
1250
1251    ctx->nr_so_targets_saved = ctx->nr_so_targets;
1252
1253    for (i = 0; i < ctx->nr_so_targets; i++) {
1254       assert(!ctx->so_targets_saved[i]);
1255       pipe_so_target_reference(&ctx->so_targets_saved[i], ctx->so_targets[i]);
1256    }
1257 }
1258
1259 void
1260 cso_restore_stream_outputs(struct cso_context *ctx)
1261 {
1262    struct pipe_context *pipe = ctx->pipe;
1263    uint i;
1264
1265    if (!ctx->has_streamout) {
1266       return;
1267    }
1268
1269    if (ctx->nr_so_targets == 0 && ctx->nr_so_targets_saved == 0) {
1270       /* Nothing to do. */
1271       return;
1272    }
1273
1274    for (i = 0; i < ctx->nr_so_targets_saved; i++) {
1275       pipe_so_target_reference(&ctx->so_targets[i], NULL);
1276       /* move the reference from one pointer to another */
1277       ctx->so_targets[i] = ctx->so_targets_saved[i];
1278       ctx->so_targets_saved[i] = NULL;
1279    }
1280    for (; i < ctx->nr_so_targets; i++) {
1281       pipe_so_target_reference(&ctx->so_targets[i], NULL);
1282    }
1283
1284    /* ~0 means append */
1285    pipe->set_stream_output_targets(pipe, ctx->nr_so_targets_saved,
1286                                    ctx->so_targets, ~0);
1287
1288    ctx->nr_so_targets = ctx->nr_so_targets_saved;
1289    ctx->nr_so_targets_saved = 0;
1290 }
1291
1292 /* drawing */
1293
1294 void
1295 cso_set_index_buffer(struct cso_context *cso,
1296                      const struct pipe_index_buffer *ib)
1297 {
1298    struct u_vbuf *vbuf = cso->vbuf;
1299
1300    if (vbuf) {
1301       u_vbuf_set_index_buffer(vbuf, ib);
1302    } else {
1303       struct pipe_context *pipe = cso->pipe;
1304       pipe->set_index_buffer(pipe, ib);
1305    }
1306 }
1307
1308 void
1309 cso_draw_vbo(struct cso_context *cso,
1310              const struct pipe_draw_info *info)
1311 {
1312    struct u_vbuf *vbuf = cso->vbuf;
1313
1314    if (vbuf) {
1315       u_vbuf_draw_vbo(vbuf, info);
1316    } else {
1317       struct pipe_context *pipe = cso->pipe;
1318       pipe->draw_vbo(pipe, info);
1319    }
1320 }
1321
1322 void
1323 cso_draw_arrays(struct cso_context *cso, uint mode, uint start, uint count)
1324 {
1325    struct pipe_draw_info info;
1326
1327    util_draw_init_info(&info);
1328
1329    info.mode = mode;
1330    info.start = start;
1331    info.count = count;
1332    info.min_index = start;
1333    info.max_index = start + count - 1;
1334
1335    cso_draw_vbo(cso, &info);
1336 }