src/gallium/drivers/svga/svga_surface.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "svga_cmd.h"
  27
  28 #include "pipe/p_state.h"
  29 #include "pipe/p_defines.h"
  30 #include "util/u_inlines.h"
  31 #include "os/os_thread.h"
  32 #include "util/u_bitmask.h"
  33 #include "util/u_format.h"
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36
  37 #include "svga_format.h"
  38 #include "svga_screen.h"
  39 #include "svga_context.h"
  40 #include "svga_sampler_view.h"
  41 #include "svga_resource_texture.h"
  42 #include "svga_surface.h"
  43 #include "svga_debug.h"
  44
  45 static void svga_mark_surface_dirty(struct pipe_surface *surf);
  46
  47 void
  48 svga_texture_copy_handle(struct svga_context *svga,
  49                          struct svga_winsys_surface *src_handle,
  50                          unsigned src_x, unsigned src_y, unsigned src_z,
  51                          unsigned src_level, unsigned src_layer,
  52                          struct svga_winsys_surface *dst_handle,
  53                          unsigned dst_x, unsigned dst_y, unsigned dst_z,
  54                          unsigned dst_level, unsigned dst_layer,
  55                          unsigned width, unsigned height, unsigned depth)
  56 {
  57    struct svga_surface dst, src;
  58    enum pipe_error ret;
  59    SVGA3dCopyBox box, *boxes;
  60
  61    assert(svga);
  62
  63    src.handle = src_handle;
  64    src.real_level = src_level;
  65    src.real_layer = src_layer;
  66    src.real_zslice = 0;
  67
  68    dst.handle = dst_handle;
  69    dst.real_level = dst_level;
  70    dst.real_layer = dst_layer;
  71    dst.real_zslice = 0;
  72
  73    box.x = dst_x;
  74    box.y = dst_y;
  75    box.z = dst_z;
  76    box.w = width;
  77    box.h = height;
  78    box.d = depth;
  79    box.srcx = src_x;
  80    box.srcy = src_y;
  81    box.srcz = src_z;
  82
  83 /*
  84    SVGA_DBG(DEBUG_VIEWS, "mipcopy src: %p %u (%ux%ux%u), dst: %p %u (%ux%ux%u)\n",
  85             src_handle, src_level, src_x, src_y, src_z,
  86             dst_handle, dst_level, dst_x, dst_y, dst_z);
  87 */
  88
  89    ret = SVGA3D_BeginSurfaceCopy(svga->swc,
  90                                  &src.base,
  91                                  &dst.base,
  92                                  &boxes, 1);
  93    if (ret != PIPE_OK) {
  94       svga_context_flush(svga, NULL);
  95       ret = SVGA3D_BeginSurfaceCopy(svga->swc,
  96                                     &src.base,
  97                                     &dst.base,
  98                                     &boxes, 1);
  99       assert(ret == PIPE_OK);
 100    }
 101    *boxes = box;
 102    SVGA_FIFOCommitAll(svga->swc);
 103 }
 104
 105
 106 struct svga_winsys_surface *
 107 svga_texture_view_surface(struct svga_context *svga,
 108                           struct svga_texture *tex,
 109                           unsigned bind_flags,
 110                           SVGA3dSurfaceFlags flags,
 111                           SVGA3dSurfaceFormat format,
 112                           unsigned start_mip,
 113                           unsigned num_mip,
 114                           int layer_pick,
 115                           unsigned num_layers,
 116                           int zslice_pick,
 117                           struct svga_host_surface_cache_key *key) /* OUT */
 118 {
 119    struct svga_screen *ss = svga_screen(svga->pipe.screen);
 120    struct svga_winsys_surface *handle;
 121    uint32_t i, j;
 122    unsigned z_offset = 0;
 123
 124    SVGA_DBG(DEBUG_PERF,
 125             "svga: Create surface view: layer %d zslice %d mips %d..%d\n",
 126             layer_pick, zslice_pick, start_mip, start_mip+num_mip-1);
 127
 128    key->flags = flags;
 129    key->format = format;
 130    key->numMipLevels = num_mip;
 131    key->size.width = u_minify(tex->b.b.width0, start_mip);
 132    key->size.height = u_minify(tex->b.b.height0, start_mip);
 133    key->size.depth = zslice_pick < 0 ? u_minify(tex->b.b.depth0, start_mip) : 1;
 134    key->cachable = 1;
 135    key->arraySize = 1;
 136    key->numFaces = 1;
 137
 138    /* single sample surface can be treated as non-multisamples surface */
 139    key->sampleCount = tex->b.b.nr_samples > 1 ? tex->b.b.nr_samples : 0;
 140
 141    if (key->sampleCount > 1) {
 142       key->flags |= SVGA3D_SURFACE_MASKABLE_ANTIALIAS;
 143    }
 144
 145    if (tex->b.b.target == PIPE_TEXTURE_CUBE && layer_pick < 0) {
 146       key->flags |= SVGA3D_SURFACE_CUBEMAP;
 147       key->numFaces = 6;
 148    } else if (tex->b.b.target == PIPE_TEXTURE_1D_ARRAY ||
 149               tex->b.b.target == PIPE_TEXTURE_2D_ARRAY) {
 150       key->arraySize = num_layers;
 151    }
 152
 153    if (key->format == SVGA3D_FORMAT_INVALID) {
 154       key->cachable = 0;
 155       return NULL;
 156    }
 157
 158    SVGA_DBG(DEBUG_DMA, "surface_create for texture view\n");
 159    handle = svga_screen_surface_create(ss, bind_flags, PIPE_USAGE_DEFAULT, key);
 160    if (!handle) {
 161       key->cachable = 0;
 162       return NULL;
 163    }
 164
 165    SVGA_DBG(DEBUG_DMA, " --> got sid %p (texture view)\n", handle);
 166
 167    if (layer_pick < 0)
 168       layer_pick = 0;
 169
 170    if (zslice_pick >= 0)
 171       z_offset = zslice_pick;
 172
 173    for (i = 0; i < key->numMipLevels; i++) {
 174       for (j = 0; j < key->numFaces * key->arraySize; j++) {
 175          if (svga_is_texture_level_defined(tex, j + layer_pick, i + start_mip)) {
 176             unsigned depth = (zslice_pick < 0 ?
 177                               u_minify(tex->b.b.depth0, i + start_mip) :
 178                               1);
 179
 180             svga_texture_copy_handle(svga,
 181                                      tex->handle,
 182                                      0, 0, z_offset,
 183                                      i + start_mip,
 184                                      j + layer_pick,
 185                                      handle, 0, 0, 0, i, j,
 186                                      u_minify(tex->b.b.width0, i + start_mip),
 187                                      u_minify(tex->b.b.height0, i + start_mip),
 188                                      depth);
 189          }
 190       }
 191    }
 192
 193    return handle;
 194 }
 195
 196
 197 /**
 198  * A helper function to create a surface view.
 199  * The view boolean flag specifies whether svga_texture_view_surface()
 200  * will be called to create a cloned surface and resource for the view.
 201  */
 202 static struct pipe_surface *
 203 svga_create_surface_view(struct pipe_context *pipe,
 204                          struct pipe_resource *pt,
 205                          const struct pipe_surface *surf_tmpl,
 206                          boolean view)
 207 {
 208    struct svga_context *svga = svga_context(pipe);
 209    struct svga_texture *tex = svga_texture(pt);
 210    struct pipe_screen *screen = pipe->screen;
 211    struct svga_screen *ss = svga_screen(screen);
 212    struct svga_surface *s;
 213    unsigned layer, zslice, bind;
 214    unsigned nlayers = 1;
 215    SVGA3dSurfaceFlags flags = 0;
 216    SVGA3dSurfaceFormat format;
 217    struct pipe_surface *retVal = NULL;
 218
 219    s = CALLOC_STRUCT(svga_surface);
 220    if (!s)
 221       return NULL;
 222
 223    SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_CREATESURFACEVIEW);
 224
 225    if (pt->target == PIPE_TEXTURE_CUBE) {
 226       layer = surf_tmpl->u.tex.first_layer;
 227       zslice = 0;
 228    }
 229    else if (pt->target == PIPE_TEXTURE_1D_ARRAY ||
 230             pt->target == PIPE_TEXTURE_2D_ARRAY) {
 231       layer = surf_tmpl->u.tex.first_layer;
 232       zslice = 0;
 233       nlayers = surf_tmpl->u.tex.last_layer - surf_tmpl->u.tex.first_layer + 1;
 234    }
 235    else {
 236       layer = 0;
 237       zslice = surf_tmpl->u.tex.first_layer;
 238    }
 239
 240    pipe_reference_init(&s->base.reference, 1);
 241    pipe_resource_reference(&s->base.texture, pt);
 242    s->base.context = pipe;
 243    s->base.format = surf_tmpl->format;
 244    s->base.width = u_minify(pt->width0, surf_tmpl->u.tex.level);
 245    s->base.height = u_minify(pt->height0, surf_tmpl->u.tex.level);
 246    s->base.u.tex.level = surf_tmpl->u.tex.level;
 247    s->base.u.tex.first_layer = surf_tmpl->u.tex.first_layer;
 248    s->base.u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 249    s->view_id = SVGA3D_INVALID_ID;
 250
 251    s->backed = NULL;
 252
 253    if (util_format_is_depth_or_stencil(surf_tmpl->format)) {
 254       flags = SVGA3D_SURFACE_HINT_DEPTHSTENCIL |
 255               SVGA3D_SURFACE_BIND_DEPTH_STENCIL;
 256       bind = PIPE_BIND_DEPTH_STENCIL;
 257    }
 258    else {
 259       flags = SVGA3D_SURFACE_HINT_RENDERTARGET |
 260               SVGA3D_SURFACE_BIND_RENDER_TARGET;
 261       bind = PIPE_BIND_RENDER_TARGET;
 262    }
 263
 264    if (tex->imported)
 265       format = tex->key.format;
 266    else
 267       format = svga_translate_format(ss, surf_tmpl->format, bind);
 268
 269    assert(format != SVGA3D_FORMAT_INVALID);
 270
 271    if (view) {
 272       SVGA_DBG(DEBUG_VIEWS, "svga: Surface view: yes %p, level %u layer %u z %u, %p\n",
 273                pt, surf_tmpl->u.tex.level, layer, zslice, s);
 274
 275       if (svga_have_vgpu10(svga)) {
 276          switch (pt->target) {
 277          case PIPE_TEXTURE_1D:
 278             flags |= SVGA3D_SURFACE_1D;
 279             break;
 280          case PIPE_TEXTURE_1D_ARRAY:
 281             flags |= SVGA3D_SURFACE_1D | SVGA3D_SURFACE_ARRAY;
 282             break;
 283          case PIPE_TEXTURE_2D_ARRAY:
 284             flags |= SVGA3D_SURFACE_ARRAY;
 285             break;
 286          case PIPE_TEXTURE_3D:
 287             flags |= SVGA3D_SURFACE_VOLUME;
 288             break;
 289          case PIPE_TEXTURE_CUBE:
 290             if (nlayers == 6)
 291                flags |= SVGA3D_SURFACE_CUBEMAP;
 292             break;
 293          default:
 294             break;
 295          }
 296       }
 297
 298       /* When we clone the surface view resource, use the format used in
 299        * the creation of the original resource.
 300        */
 301       s->handle = svga_texture_view_surface(svga, tex, bind, flags,
 302                                             tex->key.format,
 303                                             surf_tmpl->u.tex.level, 1,
 304                                             layer, nlayers, zslice, &s->key);
 305       if (!s->handle) {
 306          FREE(s);
 307          goto done;
 308       }
 309
 310       s->key.format = format;
 311       s->real_layer = 0;
 312       s->real_level = 0;
 313       s->real_zslice = 0;
 314    } else {
 315       SVGA_DBG(DEBUG_VIEWS,
 316                "svga: Surface view: no %p, level %u, layer %u, z %u, %p\n",
 317                pt, surf_tmpl->u.tex.level, layer, zslice, s);
 318
 319       memset(&s->key, 0, sizeof s->key);
 320       s->key.format = format;
 321       s->handle = tex->handle;
 322       s->real_layer = layer;
 323       s->real_zslice = zslice;
 324       s->real_level = surf_tmpl->u.tex.level;
 325    }
 326
 327    svga->hud.num_surface_views++;
 328    retVal = &s->base;
 329
 330 done:
 331    SVGA_STATS_TIME_POP(ss->sws);
 332    return retVal;
 333 }
 334
 335
 336 static struct pipe_surface *
 337 svga_create_surface(struct pipe_context *pipe,
 338                     struct pipe_resource *pt,
 339                     const struct pipe_surface *surf_tmpl)
 340 {
 341    struct svga_context *svga = svga_context(pipe);
 342    struct pipe_screen *screen = pipe->screen;
 343    struct pipe_surface *surf = NULL;
 344    boolean view = FALSE;
 345
 346    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_CREATESURFACE);
 347
 348    if (svga_screen(screen)->debug.force_surface_view)
 349       view = TRUE;
 350
 351    if (surf_tmpl->u.tex.level != 0 &&
 352        svga_screen(screen)->debug.force_level_surface_view)
 353       view = TRUE;
 354
 355    if (pt->target == PIPE_TEXTURE_3D)
 356       view = TRUE;
 357
 358    if (svga_have_vgpu10(svga) || svga_screen(screen)->debug.no_surface_view)
 359       view = FALSE;
 360
 361    surf = svga_create_surface_view(pipe, pt, surf_tmpl, view);
 362
 363    SVGA_STATS_TIME_POP(svga_sws(svga));
 364
 365    return surf;
 366 }
 367
 368
 369 /**
 370  * Clone the surface view and its associated resource.
 371  */
 372 static struct svga_surface *
 373 create_backed_surface_view(struct svga_context *svga, struct svga_surface *s)
 374 {
 375    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 376                         SVGA_STATS_TIME_CREATEBACKEDSURFACEVIEW);
 377
 378    if (!s->backed) {
 379       struct svga_texture *tex = svga_texture(s->base.texture);
 380       struct pipe_surface *backed_view;
 381
 382       backed_view = svga_create_surface_view(&svga->pipe,
 383                                              &tex->b.b,
 384                                              &s->base,
 385                                              TRUE);
 386       if (!backed_view)
 387          return NULL;
 388
 389       s->backed = svga_surface(backed_view);
 390    }
 391
 392    svga_mark_surface_dirty(&s->backed->base);
 393
 394    SVGA_STATS_TIME_POP(svga_sws(svga));
 395
 396    return s->backed;
 397 }
 398
 399 /**
 400  * Create a DX RenderTarget/DepthStencil View for the given surface,
 401  * if needed.
 402  */
 403 struct pipe_surface *
 404 svga_validate_surface_view(struct svga_context *svga, struct svga_surface *s)
 405 {
 406    enum pipe_error ret = PIPE_OK;
 407    enum pipe_shader_type shader;
 408
 409    assert(svga_have_vgpu10(svga));
 410    assert(s);
 411
 412    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 413                         SVGA_STATS_TIME_VALIDATESURFACEVIEW);
 414
 415    /**
 416     * DX spec explicitly specifies that no resource can be bound to a render
 417     * target view and a shader resource view simultanously.
 418     * So first check if the resource bound to this surface view collides with
 419     * a sampler view. If so, then we will clone this surface view and its
 420     * associated resource. We will then use the cloned surface view for
 421     * render target.
 422     */
 423    for (shader = PIPE_SHADER_VERTEX; shader <= PIPE_SHADER_GEOMETRY; shader++) {
 424       if (svga_check_sampler_view_resource_collision(svga, s->handle, shader)) {
 425          SVGA_DBG(DEBUG_VIEWS,
 426                   "same resource used in shaderResource and renderTarget 0x%x\n",
 427                   s->handle);
 428          s = create_backed_surface_view(svga, s);
 429          /* s may be null here if the function failed */
 430          break;
 431       }
 432    }
 433
 434    if (s && s->view_id == SVGA3D_INVALID_ID) {
 435       SVGA3dResourceType resType;
 436       SVGA3dRenderTargetViewDesc desc;
 437
 438       desc.tex.mipSlice = s->real_level;
 439       desc.tex.firstArraySlice = s->real_layer + s->real_zslice;
 440       desc.tex.arraySize =
 441          s->base.u.tex.last_layer - s->base.u.tex.first_layer + 1;
 442
 443       s->view_id = util_bitmask_add(svga->surface_view_id_bm);
 444
 445       resType = svga_resource_type(s->base.texture->target);
 446
 447       if (util_format_is_depth_or_stencil(s->base.format)) {
 448          ret = SVGA3D_vgpu10_DefineDepthStencilView(svga->swc,
 449                                                     s->view_id,
 450                                                     s->handle,
 451                                                     s->key.format,
 452                                                     resType,
 453                                                     &desc);
 454       }
 455       else {
 456          SVGA3dSurfaceFormat view_format = s->key.format;
 457          const struct svga_texture *stex = svga_texture(s->base.texture);
 458
 459          /* Can't create RGBA render target view of a RGBX surface so adjust
 460           * the view format.  We do something similar for texture samplers in
 461           * svga_validate_pipe_sampler_view().
 462           */
 463          if (view_format == SVGA3D_B8G8R8A8_UNORM &&
 464              (stex->key.format == SVGA3D_B8G8R8X8_UNORM ||
 465               stex->key.format == SVGA3D_B8G8R8X8_TYPELESS)) {
 466             view_format = SVGA3D_B8G8R8X8_UNORM;
 467          }
 468
 469          ret = SVGA3D_vgpu10_DefineRenderTargetView(svga->swc,
 470                                                     s->view_id,
 471                                                     s->handle,
 472                                                     view_format,
 473                                                     resType,
 474                                                     &desc);
 475       }
 476
 477       if (ret != PIPE_OK) {
 478          util_bitmask_clear(svga->surface_view_id_bm, s->view_id);
 479          s->view_id = SVGA3D_INVALID_ID;
 480          s = NULL;
 481       }
 482    }
 483
 484    SVGA_STATS_TIME_POP(svga_sws(svga));
 485
 486    return s ? &s->base : NULL;
 487 }
 488
 489
 490
 491 static void
 492 svga_surface_destroy(struct pipe_context *pipe,
 493                      struct pipe_surface *surf)
 494 {
 495    struct svga_context *svga = svga_context(pipe);
 496    struct svga_surface *s = svga_surface(surf);
 497    struct svga_texture *t = svga_texture(surf->texture);
 498    struct svga_screen *ss = svga_screen(surf->texture->screen);
 499    enum pipe_error ret = PIPE_OK;
 500
 501    SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_DESTROYSURFACE);
 502
 503    /* Destroy the backed view surface if it exists */
 504    if (s->backed) {
 505       svga_surface_destroy(pipe, &s->backed->base);
 506       s->backed = NULL;
 507    }
 508
 509    if (s->handle != t->handle) {
 510       SVGA_DBG(DEBUG_DMA, "unref sid %p (tex surface)\n", s->handle);
 511       svga_screen_surface_destroy(ss, &s->key, &s->handle);
 512    }
 513
 514    if (s->view_id != SVGA3D_INVALID_ID) {
 515       unsigned try;
 516
 517       assert(svga_have_vgpu10(svga));
 518       for (try = 0; try < 2; try++) {
 519          if (util_format_is_depth_or_stencil(s->base.format)) {
 520             ret = SVGA3D_vgpu10_DestroyDepthStencilView(svga->swc, s->view_id);
 521          }
 522          else {
 523             ret = SVGA3D_vgpu10_DestroyRenderTargetView(svga->swc, s->view_id);
 524          }
 525          if (ret == PIPE_OK)
 526             break;
 527          svga_context_flush(svga, NULL);
 528       }
 529       assert(ret == PIPE_OK);
 530       util_bitmask_clear(svga->surface_view_id_bm, s->view_id);
 531    }
 532
 533    pipe_resource_reference(&surf->texture, NULL);
 534    FREE(surf);
 535
 536    svga->hud.num_surface_views--;
 537    SVGA_STATS_TIME_POP(ss->sws);
 538 }
 539
 540
 541 static void
 542 svga_mark_surface_dirty(struct pipe_surface *surf)
 543 {
 544    struct svga_surface *s = svga_surface(surf);
 545    struct svga_texture *tex = svga_texture(surf->texture);
 546
 547    if (!s->dirty) {
 548       s->dirty = TRUE;
 549
 550       if (s->handle == tex->handle) {
 551          /* hmm so 3d textures always have all their slices marked ? */
 552          svga_define_texture_level(tex, surf->u.tex.first_layer,
 553                                    surf->u.tex.level);
 554       }
 555       else {
 556          /* this will happen later in svga_propagate_surface */
 557       }
 558    }
 559
 560    /* Increment the view_age and texture age for this surface's mipmap
 561     * level so that any sampler views into the texture are re-validated too.
 562     */
 563    svga_age_texture_view(tex, surf->u.tex.level);
 564 }
 565
 566
 567 void
 568 svga_mark_surfaces_dirty(struct svga_context *svga)
 569 {
 570    unsigned i;
 571
 572    for (i = 0; i < svga->curr.framebuffer.nr_cbufs; i++) {
 573       if (svga->curr.framebuffer.cbufs[i])
 574          svga_mark_surface_dirty(svga->curr.framebuffer.cbufs[i]);
 575    }
 576    if (svga->curr.framebuffer.zsbuf)
 577       svga_mark_surface_dirty(svga->curr.framebuffer.zsbuf);
 578 }
 579
 580
 581 /**
 582  * Progagate any changes from surfaces to texture.
 583  * pipe is optional context to inline the blit command in.
 584  */
 585 void
 586 svga_propagate_surface(struct svga_context *svga, struct pipe_surface *surf)
 587 {
 588    struct svga_surface *s = svga_surface(surf);
 589    struct svga_texture *tex = svga_texture(surf->texture);
 590    struct svga_screen *ss = svga_screen(surf->texture->screen);
 591
 592    if (!s->dirty)
 593       return;
 594
 595    SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_PROPAGATESURFACE);
 596
 597    s->dirty = FALSE;
 598    ss->texture_timestamp++;
 599    svga_age_texture_view(tex, surf->u.tex.level);
 600
 601    if (s->handle != tex->handle) {
 602       unsigned zslice, layer;
 603       unsigned nlayers = 1;
 604       unsigned i;
 605
 606       if (surf->texture->target == PIPE_TEXTURE_CUBE) {
 607          zslice = 0;
 608          layer = surf->u.tex.first_layer;
 609       }
 610       else if (surf->texture->target == PIPE_TEXTURE_1D_ARRAY ||
 611                surf->texture->target == PIPE_TEXTURE_2D_ARRAY) {
 612          zslice = 0;
 613          layer = surf->u.tex.first_layer;
 614          nlayers = surf->u.tex.last_layer - surf->u.tex.first_layer + 1;
 615       }
 616       else {
 617          zslice = surf->u.tex.first_layer;
 618          layer = 0;
 619       }
 620
 621       SVGA_DBG(DEBUG_VIEWS,
 622                "svga: Surface propagate: tex %p, level %u, from %p\n",
 623                tex, surf->u.tex.level, surf);
 624       for (i = 0; i < nlayers; i++) {
 625          svga_texture_copy_handle(svga,
 626                                   s->handle, 0, 0, 0, s->real_level,
 627                                   s->real_layer + i,
 628                                   tex->handle, 0, 0, zslice, surf->u.tex.level,
 629                                   layer + i,
 630                                   u_minify(tex->b.b.width0, surf->u.tex.level),
 631                                   u_minify(tex->b.b.height0, surf->u.tex.level),
 632                                   1);
 633          svga_define_texture_level(tex, layer + i, surf->u.tex.level);
 634       }
 635    }
 636
 637    SVGA_STATS_TIME_POP(ss->sws);
 638 }
 639
 640
 641 /**
 642  * If any of the render targets are in backing texture views, propagate any
 643  * changes to them back to the original texture.
 644  */
 645 void
 646 svga_propagate_rendertargets(struct svga_context *svga)
 647 {
 648    unsigned i;
 649
 650    /* Note that we examine the svga->state.hw_draw.framebuffer surfaces,
 651     * not the svga->curr.framebuffer surfaces, because it's the former
 652     * surfaces which may be backing surface views (the actual render targets).
 653     */
 654    for (i = 0; i < svga->state.hw_draw.num_rendertargets; i++) {
 655       struct pipe_surface *s = svga->state.hw_draw.rtv[i];
 656       if (s) {
 657          svga_propagate_surface(svga, s);
 658       }
 659    }
 660
 661    if (svga->state.hw_draw.dsv) {
 662       svga_propagate_surface(svga, svga->state.hw_draw.dsv);
 663    }
 664 }
 665
 666
 667 /**
 668  * Check if we should call svga_propagate_surface on the surface.
 669  */
 670 boolean
 671 svga_surface_needs_propagation(const struct pipe_surface *surf)
 672 {
 673    const struct svga_surface *s = svga_surface_const(surf);
 674    struct svga_texture *tex = svga_texture(surf->texture);
 675
 676    return s->dirty && s->handle != tex->handle;
 677 }
 678
 679
 680 static void
 681 svga_get_sample_position(struct pipe_context *context,
 682                          unsigned sample_count, unsigned sample_index,
 683                          float *pos_out)
 684 {
 685    /* We can't actually query the device to learn the sample positions.
 686     * These were grabbed from nvidia's driver.
 687     */
 688    static const float pos1[1][2] = {
 689       { 0.5, 0.5 }
 690    };
 691    static const float pos4[4][2] = {
 692       { 0.375000, 0.125000 },
 693       { 0.875000, 0.375000 },
 694       { 0.125000, 0.625000 },
 695       { 0.625000, 0.875000 }
 696    };
 697    static const float pos8[8][2] = {
 698       { 0.562500, 0.312500 },
 699       { 0.437500, 0.687500 },
 700       { 0.812500, 0.562500 },
 701       { 0.312500, 0.187500 },
 702       { 0.187500, 0.812500 },
 703       { 0.062500, 0.437500 },
 704       { 0.687500, 0.937500 },
 705       { 0.937500, 0.062500 }
 706    };
 707    static const float pos16[16][2] = {
 708       { 0.187500, 0.062500 },
 709       { 0.437500, 0.187500 },
 710       { 0.062500, 0.312500 },
 711       { 0.312500, 0.437500 },
 712       { 0.687500, 0.062500 },
 713       { 0.937500, 0.187500 },
 714       { 0.562500, 0.312500 },
 715       { 0.812500, 0.437500 },
 716       { 0.187500, 0.562500 },
 717       { 0.437500, 0.687500 },
 718       { 0.062500, 0.812500 },
 719       { 0.312500, 0.937500 },
 720       { 0.687500, 0.562500 },
 721       { 0.937500, 0.687500 },
 722       { 0.562500, 0.812500 },
 723       { 0.812500, 0.937500 }
 724    };
 725    const float (*positions)[2];
 726
 727    switch (sample_count) {
 728    case 4:
 729       positions = pos4;
 730       break;
 731    case 8:
 732       positions = pos8;
 733       break;
 734    case 16:
 735       positions = pos16;
 736       break;
 737    default:
 738       positions = pos1;
 739    }
 740
 741    pos_out[0] = positions[sample_index][0];
 742    pos_out[1] = positions[sample_index][1];
 743 }
 744
 745
 746 void
 747 svga_init_surface_functions(struct svga_context *svga)
 748 {
 749    svga->pipe.create_surface = svga_create_surface;
 750    svga->pipe.surface_destroy = svga_surface_destroy;
 751    svga->pipe.get_sample_position = svga_get_sample_position;
 752 }