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    boolean validated;
 124
 125    SVGA_DBG(DEBUG_PERF,
 126             "svga: Create surface view: layer %d zslice %d mips %d..%d\n",
 127             layer_pick, zslice_pick, start_mip, start_mip+num_mip-1);
 128
 129    key->flags = flags;
 130    key->format = format;
 131    key->numMipLevels = num_mip;
 132    key->size.width = u_minify(tex->b.b.width0, start_mip);
 133    key->size.height = u_minify(tex->b.b.height0, start_mip);
 134    key->size.depth = zslice_pick < 0 ? u_minify(tex->b.b.depth0, start_mip) : 1;
 135    key->cachable = 1;
 136    key->arraySize = 1;
 137    key->numFaces = 1;
 138
 139    /* single sample surface can be treated as non-multisamples surface */
 140    key->sampleCount = tex->b.b.nr_samples > 1 ? tex->b.b.nr_samples : 0;
 141
 142    if (key->sampleCount > 1) {
 143       key->flags |= SVGA3D_SURFACE_MASKABLE_ANTIALIAS;
 144    }
 145
 146    if (tex->b.b.target == PIPE_TEXTURE_CUBE && layer_pick < 0) {
 147       key->flags |= SVGA3D_SURFACE_CUBEMAP;
 148       key->numFaces = 6;
 149    } else if (tex->b.b.target == PIPE_TEXTURE_1D_ARRAY ||
 150               tex->b.b.target == PIPE_TEXTURE_2D_ARRAY) {
 151       key->arraySize = num_layers;
 152    }
 153
 154    if (key->format == SVGA3D_FORMAT_INVALID) {
 155       key->cachable = 0;
 156       return NULL;
 157    }
 158
 159    SVGA_DBG(DEBUG_DMA, "surface_create for texture view\n");
 160    handle = svga_screen_surface_create(ss, bind_flags, PIPE_USAGE_DEFAULT,
 161                                        &validated, key);
 162    if (!handle) {
 163       key->cachable = 0;
 164       return NULL;
 165    }
 166
 167    SVGA_DBG(DEBUG_DMA, " --> got sid %p (texture view)\n", handle);
 168
 169    if (layer_pick < 0)
 170       layer_pick = 0;
 171
 172    if (zslice_pick >= 0)
 173       z_offset = zslice_pick;
 174
 175    for (i = 0; i < key->numMipLevels; i++) {
 176       for (j = 0; j < key->numFaces * key->arraySize; j++) {
 177          if (svga_is_texture_level_defined(tex, j + layer_pick, i + start_mip)) {
 178             unsigned depth = (zslice_pick < 0 ?
 179                               u_minify(tex->b.b.depth0, i + start_mip) :
 180                               1);
 181
 182             svga_texture_copy_handle(svga,
 183                                      tex->handle,
 184                                      0, 0, z_offset,
 185                                      i + start_mip,
 186                                      j + layer_pick,
 187                                      handle, 0, 0, 0, i, j,
 188                                      u_minify(tex->b.b.width0, i + start_mip),
 189                                      u_minify(tex->b.b.height0, i + start_mip),
 190                                      depth);
 191          }
 192       }
 193    }
 194
 195    return handle;
 196 }
 197
 198
 199 /**
 200  * A helper function to create a surface view.
 201  * The view boolean flag specifies whether svga_texture_view_surface()
 202  * will be called to create a cloned surface and resource for the view.
 203  */
 204 static struct pipe_surface *
 205 svga_create_surface_view(struct pipe_context *pipe,
 206                          struct pipe_resource *pt,
 207                          const struct pipe_surface *surf_tmpl,
 208                          boolean view)
 209 {
 210    struct svga_context *svga = svga_context(pipe);
 211    struct svga_texture *tex = svga_texture(pt);
 212    struct pipe_screen *screen = pipe->screen;
 213    struct svga_screen *ss = svga_screen(screen);
 214    struct svga_surface *s;
 215    unsigned layer, zslice, bind;
 216    unsigned nlayers = 1;
 217    SVGA3dSurfaceFlags flags = 0;
 218    SVGA3dSurfaceFormat format;
 219    struct pipe_surface *retVal = NULL;
 220
 221    s = CALLOC_STRUCT(svga_surface);
 222    if (!s)
 223       return NULL;
 224
 225    SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_CREATESURFACEVIEW);
 226
 227    if (pt->target == PIPE_TEXTURE_CUBE) {
 228       layer = surf_tmpl->u.tex.first_layer;
 229       zslice = 0;
 230    }
 231    else if (pt->target == PIPE_TEXTURE_1D_ARRAY ||
 232             pt->target == PIPE_TEXTURE_2D_ARRAY) {
 233       layer = surf_tmpl->u.tex.first_layer;
 234       zslice = 0;
 235       nlayers = surf_tmpl->u.tex.last_layer - surf_tmpl->u.tex.first_layer + 1;
 236    }
 237    else {
 238       layer = 0;
 239       zslice = surf_tmpl->u.tex.first_layer;
 240    }
 241
 242    pipe_reference_init(&s->base.reference, 1);
 243    pipe_resource_reference(&s->base.texture, pt);
 244    s->base.context = pipe;
 245    s->base.format = surf_tmpl->format;
 246    s->base.width = u_minify(pt->width0, surf_tmpl->u.tex.level);
 247    s->base.height = u_minify(pt->height0, surf_tmpl->u.tex.level);
 248    s->base.u.tex.level = surf_tmpl->u.tex.level;
 249    s->base.u.tex.first_layer = surf_tmpl->u.tex.first_layer;
 250    s->base.u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 251    s->view_id = SVGA3D_INVALID_ID;
 252
 253    s->backed = NULL;
 254
 255    if (util_format_is_depth_or_stencil(surf_tmpl->format)) {
 256       flags = SVGA3D_SURFACE_HINT_DEPTHSTENCIL |
 257               SVGA3D_SURFACE_BIND_DEPTH_STENCIL;
 258       bind = PIPE_BIND_DEPTH_STENCIL;
 259    }
 260    else {
 261       flags = SVGA3D_SURFACE_HINT_RENDERTARGET |
 262               SVGA3D_SURFACE_BIND_RENDER_TARGET;
 263       bind = PIPE_BIND_RENDER_TARGET;
 264    }
 265
 266    if (tex->imported)
 267       format = tex->key.format;
 268    else
 269       format = svga_translate_format(ss, surf_tmpl->format, bind);
 270
 271    assert(format != SVGA3D_FORMAT_INVALID);
 272
 273    if (view) {
 274       SVGA_DBG(DEBUG_VIEWS, "svga: Surface view: yes %p, level %u layer %u z %u, %p\n",
 275                pt, surf_tmpl->u.tex.level, layer, zslice, s);
 276
 277       if (svga_have_vgpu10(svga)) {
 278          switch (pt->target) {
 279          case PIPE_TEXTURE_1D:
 280             flags |= SVGA3D_SURFACE_1D;
 281             break;
 282          case PIPE_TEXTURE_1D_ARRAY:
 283             flags |= SVGA3D_SURFACE_1D | SVGA3D_SURFACE_ARRAY;
 284             break;
 285          case PIPE_TEXTURE_2D_ARRAY:
 286             flags |= SVGA3D_SURFACE_ARRAY;
 287             break;
 288          case PIPE_TEXTURE_3D:
 289             flags |= SVGA3D_SURFACE_VOLUME;
 290             break;
 291          case PIPE_TEXTURE_CUBE:
 292             if (nlayers == 6)
 293                flags |= SVGA3D_SURFACE_CUBEMAP;
 294             break;
 295          default:
 296             break;
 297          }
 298       }
 299
 300       /* When we clone the surface view resource, use the format used in
 301        * the creation of the original resource.
 302        */
 303       s->handle = svga_texture_view_surface(svga, tex, bind, flags,
 304                                             tex->key.format,
 305                                             surf_tmpl->u.tex.level, 1,
 306                                             layer, nlayers, zslice, &s->key);
 307       if (!s->handle) {
 308          FREE(s);
 309          goto done;
 310       }
 311
 312       s->key.format = format;
 313       s->real_layer = 0;
 314       s->real_level = 0;
 315       s->real_zslice = 0;
 316    } else {
 317       SVGA_DBG(DEBUG_VIEWS,
 318                "svga: Surface view: no %p, level %u, layer %u, z %u, %p\n",
 319                pt, surf_tmpl->u.tex.level, layer, zslice, s);
 320
 321       memset(&s->key, 0, sizeof s->key);
 322       s->key.format = format;
 323       s->handle = tex->handle;
 324       s->real_layer = layer;
 325       s->real_zslice = zslice;
 326       s->real_level = surf_tmpl->u.tex.level;
 327    }
 328
 329    svga->hud.num_surface_views++;
 330    retVal = &s->base;
 331
 332 done:
 333    SVGA_STATS_TIME_POP(ss->sws);
 334    return retVal;
 335 }
 336
 337
 338 static struct pipe_surface *
 339 svga_create_surface(struct pipe_context *pipe,
 340                     struct pipe_resource *pt,
 341                     const struct pipe_surface *surf_tmpl)
 342 {
 343    struct svga_context *svga = svga_context(pipe);
 344    struct pipe_screen *screen = pipe->screen;
 345    struct pipe_surface *surf = NULL;
 346    boolean view = FALSE;
 347
 348    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_CREATESURFACE);
 349
 350    if (svga_screen(screen)->debug.force_surface_view)
 351       view = TRUE;
 352
 353    if (surf_tmpl->u.tex.level != 0 &&
 354        svga_screen(screen)->debug.force_level_surface_view)
 355       view = TRUE;
 356
 357    if (pt->target == PIPE_TEXTURE_3D)
 358       view = TRUE;
 359
 360    if (svga_have_vgpu10(svga) || svga_screen(screen)->debug.no_surface_view)
 361       view = FALSE;
 362
 363    surf = svga_create_surface_view(pipe, pt, surf_tmpl, view);
 364
 365    SVGA_STATS_TIME_POP(svga_sws(svga));
 366
 367    return surf;
 368 }
 369
 370
 371 /**
 372  * Clone the surface view and its associated resource.
 373  */
 374 static struct svga_surface *
 375 create_backed_surface_view(struct svga_context *svga, struct svga_surface *s)
 376 {
 377    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 378                         SVGA_STATS_TIME_CREATEBACKEDSURFACEVIEW);
 379
 380    if (!s->backed) {
 381       struct svga_texture *tex = svga_texture(s->base.texture);
 382       struct pipe_surface *backed_view;
 383
 384       backed_view = svga_create_surface_view(&svga->pipe,
 385                                              &tex->b.b,
 386                                              &s->base,
 387                                              TRUE);
 388       if (!backed_view)
 389          return NULL;
 390
 391       s->backed = svga_surface(backed_view);
 392    }
 393
 394    svga_mark_surface_dirty(&s->backed->base);
 395
 396    SVGA_STATS_TIME_POP(svga_sws(svga));
 397
 398    return s->backed;
 399 }
 400
 401 /**
 402  * Create a DX RenderTarget/DepthStencil View for the given surface,
 403  * if needed.
 404  */
 405 struct pipe_surface *
 406 svga_validate_surface_view(struct svga_context *svga, struct svga_surface *s)
 407 {
 408    enum pipe_error ret = PIPE_OK;
 409    enum pipe_shader_type shader;
 410
 411    assert(svga_have_vgpu10(svga));
 412    assert(s);
 413
 414    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 415                         SVGA_STATS_TIME_VALIDATESURFACEVIEW);
 416
 417    /**
 418     * DX spec explicitly specifies that no resource can be bound to a render
 419     * target view and a shader resource view simultanously.
 420     * So first check if the resource bound to this surface view collides with
 421     * a sampler view. If so, then we will clone this surface view and its
 422     * associated resource. We will then use the cloned surface view for
 423     * render target.
 424     */
 425    for (shader = PIPE_SHADER_VERTEX; shader <= PIPE_SHADER_GEOMETRY; shader++) {
 426       if (svga_check_sampler_view_resource_collision(svga, s->handle, shader)) {
 427          SVGA_DBG(DEBUG_VIEWS,
 428                   "same resource used in shaderResource and renderTarget 0x%x\n",
 429                   s->handle);
 430          s = create_backed_surface_view(svga, s);
 431          /* s may be null here if the function failed */
 432          break;
 433       }
 434    }
 435
 436    if (s && s->view_id == SVGA3D_INVALID_ID) {
 437       SVGA3dResourceType resType;
 438       SVGA3dRenderTargetViewDesc desc;
 439       struct svga_texture *stex = svga_texture(s->base.texture);
 440
 441       if (stex->validated == FALSE) {
 442          assert(stex->handle);
 443
 444          /* We are about to render into a surface that has not been validated.
 445           * First invalidate the surface so that the device does not
 446           * need to update the host-side copy with the invalid
 447           * content when the associated mob is first bound to the surface.
 448           */
 449          ret = SVGA3D_InvalidateGBSurface(svga->swc, stex->handle);
 450          if (ret != PIPE_OK) {
 451             s = NULL;
 452             goto done;
 453          }
 454          stex->validated = TRUE;
 455       }
 456
 457       desc.tex.mipSlice = s->real_level;
 458       desc.tex.firstArraySlice = s->real_layer + s->real_zslice;
 459       desc.tex.arraySize =
 460          s->base.u.tex.last_layer - s->base.u.tex.first_layer + 1;
 461
 462       s->view_id = util_bitmask_add(svga->surface_view_id_bm);
 463
 464       resType = svga_resource_type(s->base.texture->target);
 465
 466       if (util_format_is_depth_or_stencil(s->base.format)) {
 467          ret = SVGA3D_vgpu10_DefineDepthStencilView(svga->swc,
 468                                                     s->view_id,
 469                                                     s->handle,
 470                                                     s->key.format,
 471                                                     resType,
 472                                                     &desc);
 473       }
 474       else {
 475          SVGA3dSurfaceFormat view_format = s->key.format;
 476          const struct svga_texture *stex = svga_texture(s->base.texture);
 477
 478          /* Can't create RGBA render target view of a RGBX surface so adjust
 479           * the view format.  We do something similar for texture samplers in
 480           * svga_validate_pipe_sampler_view().
 481           */
 482          if (view_format == SVGA3D_B8G8R8A8_UNORM &&
 483              (stex->key.format == SVGA3D_B8G8R8X8_UNORM ||
 484               stex->key.format == SVGA3D_B8G8R8X8_TYPELESS)) {
 485             view_format = SVGA3D_B8G8R8X8_UNORM;
 486          }
 487
 488          ret = SVGA3D_vgpu10_DefineRenderTargetView(svga->swc,
 489                                                     s->view_id,
 490                                                     s->handle,
 491                                                     view_format,
 492                                                     resType,
 493                                                     &desc);
 494       }
 495
 496       if (ret != PIPE_OK) {
 497          util_bitmask_clear(svga->surface_view_id_bm, s->view_id);
 498          s->view_id = SVGA3D_INVALID_ID;
 499          s = NULL;
 500       }
 501    }
 502
 503 done:
 504    SVGA_STATS_TIME_POP(svga_sws(svga));
 505
 506    return s ? &s->base : NULL;
 507 }
 508
 509
 510
 511 static void
 512 svga_surface_destroy(struct pipe_context *pipe,
 513                      struct pipe_surface *surf)
 514 {
 515    struct svga_context *svga = svga_context(pipe);
 516    struct svga_surface *s = svga_surface(surf);
 517    struct svga_texture *t = svga_texture(surf->texture);
 518    struct svga_screen *ss = svga_screen(surf->texture->screen);
 519    enum pipe_error ret = PIPE_OK;
 520
 521    SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_DESTROYSURFACE);
 522
 523    /* Destroy the backed view surface if it exists */
 524    if (s->backed) {
 525       svga_surface_destroy(pipe, &s->backed->base);
 526       s->backed = NULL;
 527    }
 528
 529    if (s->handle != t->handle) {
 530       SVGA_DBG(DEBUG_DMA, "unref sid %p (tex surface)\n", s->handle);
 531       svga_screen_surface_destroy(ss, &s->key, &s->handle);
 532    }
 533
 534    if (s->view_id != SVGA3D_INVALID_ID) {
 535       unsigned try;
 536
 537       assert(svga_have_vgpu10(svga));
 538       for (try = 0; try < 2; try++) {
 539          if (util_format_is_depth_or_stencil(s->base.format)) {
 540             ret = SVGA3D_vgpu10_DestroyDepthStencilView(svga->swc, s->view_id);
 541          }
 542          else {
 543             ret = SVGA3D_vgpu10_DestroyRenderTargetView(svga->swc, s->view_id);
 544          }
 545          if (ret == PIPE_OK)
 546             break;
 547          svga_context_flush(svga, NULL);
 548       }
 549       assert(ret == PIPE_OK);
 550       util_bitmask_clear(svga->surface_view_id_bm, s->view_id);
 551    }
 552
 553    pipe_resource_reference(&surf->texture, NULL);
 554    FREE(surf);
 555
 556    svga->hud.num_surface_views--;
 557    SVGA_STATS_TIME_POP(ss->sws);
 558 }
 559
 560
 561 static void
 562 svga_mark_surface_dirty(struct pipe_surface *surf)
 563 {
 564    struct svga_surface *s = svga_surface(surf);
 565    struct svga_texture *tex = svga_texture(surf->texture);
 566
 567    if (!s->dirty) {
 568       s->dirty = TRUE;
 569
 570       if (s->handle == tex->handle) {
 571          /* hmm so 3d textures always have all their slices marked ? */
 572          svga_define_texture_level(tex, surf->u.tex.first_layer,
 573                                    surf->u.tex.level);
 574       }
 575       else {
 576          /* this will happen later in svga_propagate_surface */
 577       }
 578    }
 579
 580    /* Increment the view_age and texture age for this surface's mipmap
 581     * level so that any sampler views into the texture are re-validated too.
 582     */
 583    svga_age_texture_view(tex, surf->u.tex.level);
 584 }
 585
 586
 587 void
 588 svga_mark_surfaces_dirty(struct svga_context *svga)
 589 {
 590    unsigned i;
 591
 592    for (i = 0; i < svga->curr.framebuffer.nr_cbufs; i++) {
 593       if (svga->curr.framebuffer.cbufs[i])
 594          svga_mark_surface_dirty(svga->curr.framebuffer.cbufs[i]);
 595    }
 596    if (svga->curr.framebuffer.zsbuf)
 597       svga_mark_surface_dirty(svga->curr.framebuffer.zsbuf);
 598 }
 599
 600
 601 /**
 602  * Progagate any changes from surfaces to texture.
 603  * pipe is optional context to inline the blit command in.
 604  */
 605 void
 606 svga_propagate_surface(struct svga_context *svga, struct pipe_surface *surf)
 607 {
 608    struct svga_surface *s = svga_surface(surf);
 609    struct svga_texture *tex = svga_texture(surf->texture);
 610    struct svga_screen *ss = svga_screen(surf->texture->screen);
 611
 612    if (!s->dirty)
 613       return;
 614
 615    SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_PROPAGATESURFACE);
 616
 617    s->dirty = FALSE;
 618    ss->texture_timestamp++;
 619    svga_age_texture_view(tex, surf->u.tex.level);
 620
 621    if (s->handle != tex->handle) {
 622       unsigned zslice, layer;
 623       unsigned nlayers = 1;
 624       unsigned i;
 625
 626       if (surf->texture->target == PIPE_TEXTURE_CUBE) {
 627          zslice = 0;
 628          layer = surf->u.tex.first_layer;
 629       }
 630       else if (surf->texture->target == PIPE_TEXTURE_1D_ARRAY ||
 631                surf->texture->target == PIPE_TEXTURE_2D_ARRAY) {
 632          zslice = 0;
 633          layer = surf->u.tex.first_layer;
 634          nlayers = surf->u.tex.last_layer - surf->u.tex.first_layer + 1;
 635       }
 636       else {
 637          zslice = surf->u.tex.first_layer;
 638          layer = 0;
 639       }
 640
 641       SVGA_DBG(DEBUG_VIEWS,
 642                "svga: Surface propagate: tex %p, level %u, from %p\n",
 643                tex, surf->u.tex.level, surf);
 644       for (i = 0; i < nlayers; i++) {
 645          svga_texture_copy_handle(svga,
 646                                   s->handle, 0, 0, 0, s->real_level,
 647                                   s->real_layer + i,
 648                                   tex->handle, 0, 0, zslice, surf->u.tex.level,
 649                                   layer + i,
 650                                   u_minify(tex->b.b.width0, surf->u.tex.level),
 651                                   u_minify(tex->b.b.height0, surf->u.tex.level),
 652                                   1);
 653          svga_define_texture_level(tex, layer + i, surf->u.tex.level);
 654       }
 655    }
 656
 657    SVGA_STATS_TIME_POP(ss->sws);
 658 }
 659
 660
 661 /**
 662  * If any of the render targets are in backing texture views, propagate any
 663  * changes to them back to the original texture.
 664  */
 665 void
 666 svga_propagate_rendertargets(struct svga_context *svga)
 667 {
 668    unsigned i;
 669
 670    /* Note that we examine the svga->state.hw_draw.framebuffer surfaces,
 671     * not the svga->curr.framebuffer surfaces, because it's the former
 672     * surfaces which may be backing surface views (the actual render targets).
 673     */
 674    for (i = 0; i < svga->state.hw_draw.num_rendertargets; i++) {
 675       struct pipe_surface *s = svga->state.hw_draw.rtv[i];
 676       if (s) {
 677          svga_propagate_surface(svga, s);
 678       }
 679    }
 680
 681    if (svga->state.hw_draw.dsv) {
 682       svga_propagate_surface(svga, svga->state.hw_draw.dsv);
 683    }
 684 }
 685
 686
 687 /**
 688  * Check if we should call svga_propagate_surface on the surface.
 689  */
 690 boolean
 691 svga_surface_needs_propagation(const struct pipe_surface *surf)
 692 {
 693    const struct svga_surface *s = svga_surface_const(surf);
 694    struct svga_texture *tex = svga_texture(surf->texture);
 695
 696    return s->dirty && s->handle != tex->handle;
 697 }
 698
 699
 700 static void
 701 svga_get_sample_position(struct pipe_context *context,
 702                          unsigned sample_count, unsigned sample_index,
 703                          float *pos_out)
 704 {
 705    /* We can't actually query the device to learn the sample positions.
 706     * These were grabbed from nvidia's driver.
 707     */
 708    static const float pos1[1][2] = {
 709       { 0.5, 0.5 }
 710    };
 711    static const float pos4[4][2] = {
 712       { 0.375000, 0.125000 },
 713       { 0.875000, 0.375000 },
 714       { 0.125000, 0.625000 },
 715       { 0.625000, 0.875000 }
 716    };
 717    static const float pos8[8][2] = {
 718       { 0.562500, 0.312500 },
 719       { 0.437500, 0.687500 },
 720       { 0.812500, 0.562500 },
 721       { 0.312500, 0.187500 },
 722       { 0.187500, 0.812500 },
 723       { 0.062500, 0.437500 },
 724       { 0.687500, 0.937500 },
 725       { 0.937500, 0.062500 }
 726    };
 727    static const float pos16[16][2] = {
 728       { 0.187500, 0.062500 },
 729       { 0.437500, 0.187500 },
 730       { 0.062500, 0.312500 },
 731       { 0.312500, 0.437500 },
 732       { 0.687500, 0.062500 },
 733       { 0.937500, 0.187500 },
 734       { 0.562500, 0.312500 },
 735       { 0.812500, 0.437500 },
 736       { 0.187500, 0.562500 },
 737       { 0.437500, 0.687500 },
 738       { 0.062500, 0.812500 },
 739       { 0.312500, 0.937500 },
 740       { 0.687500, 0.562500 },
 741       { 0.937500, 0.687500 },
 742       { 0.562500, 0.812500 },
 743       { 0.812500, 0.937500 }
 744    };
 745    const float (*positions)[2];
 746
 747    switch (sample_count) {
 748    case 4:
 749       positions = pos4;
 750       break;
 751    case 8:
 752       positions = pos8;
 753       break;
 754    case 16:
 755       positions = pos16;
 756       break;
 757    default:
 758       positions = pos1;
 759    }
 760
 761    pos_out[0] = positions[sample_index][0];
 762    pos_out[1] = positions[sample_index][1];
 763 }
 764
 765
 766 void
 767 svga_init_surface_functions(struct svga_context *svga)
 768 {
 769    svga->pipe.create_surface = svga_create_surface;
 770    svga->pipe.surface_destroy = svga_surface_destroy;
 771    svga->pipe.get_sample_position = svga_get_sample_position;
 772 }