src/gallium/drivers/svga/svga_screen.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 "util/u_memory.h"
  27 #include "util/u_inlines.h"
  28 #include "util/u_string.h"
  29 #include "util/u_math.h"
  30
  31 #include "svga_winsys.h"
  32 #include "svga_public.h"
  33 #include "svga_context.h"
  34 #include "svga_format.h"
  35 #include "svga_screen.h"
  36 #include "svga_resource_texture.h"
  37 #include "svga_resource.h"
  38 #include "svga_debug.h"
  39
  40 #include "svga3d_shaderdefs.h"
  41
  42
  43 #ifdef DEBUG
  44 int SVGA_DEBUG = 0;
  45
  46 static const struct debug_named_value svga_debug_flags[] = {
  47    { "dma",      DEBUG_DMA, NULL },
  48    { "tgsi",     DEBUG_TGSI, NULL },
  49    { "pipe",     DEBUG_PIPE, NULL },
  50    { "state",    DEBUG_STATE, NULL },
  51    { "screen",   DEBUG_SCREEN, NULL },
  52    { "tex",      DEBUG_TEX, NULL },
  53    { "swtnl",    DEBUG_SWTNL, NULL },
  54    { "const",    DEBUG_CONSTS, NULL },
  55    { "viewport", DEBUG_VIEWPORT, NULL },
  56    { "views",    DEBUG_VIEWS, NULL },
  57    { "perf",     DEBUG_PERF, NULL },
  58    { "flush",    DEBUG_FLUSH, NULL },
  59    { "sync",     DEBUG_SYNC, NULL },
  60    { "cache",    DEBUG_CACHE, NULL },
  61    DEBUG_NAMED_VALUE_END
  62 };
  63 #endif
  64
  65 static const char *
  66 svga_get_vendor( struct pipe_screen *pscreen )
  67 {
  68    return "VMware, Inc.";
  69 }
  70
  71
  72 static const char *
  73 svga_get_name( struct pipe_screen *pscreen )
  74 {
  75    const char *build = "", *llvm = "", *mutex = "";
  76    static char name[100];
  77 #ifdef DEBUG
  78    /* Only return internal details in the DEBUG version:
  79     */
  80    build = "build: DEBUG;";
  81    mutex = "mutex: " PIPE_ATOMIC ";";
  82 #ifdef HAVE_LLVM
  83    llvm = "LLVM;";
  84 #endif
  85 #else
  86    build = "build: RELEASE;";
  87 #endif
  88
  89    util_snprintf(name, sizeof(name), "SVGA3D; %s %s %s", build, mutex, llvm);
  90    return name;
  91 }
  92
  93
  94
  95
  96 static float
  97 svga_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
  98 {
  99    struct svga_screen *svgascreen = svga_screen(screen);
 100    struct svga_winsys_screen *sws = svgascreen->sws;
 101    SVGA3dDevCapResult result;
 102
 103    switch (param) {
 104    case PIPE_CAPF_MAX_LINE_WIDTH:
 105       /* fall-through */
 106    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 107       return 7.0;
 108
 109    case PIPE_CAPF_MAX_POINT_WIDTH:
 110       /* fall-through */
 111    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 112       return svgascreen->maxPointSize;
 113
 114    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 115       if(!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_TEXTURE_ANISOTROPY, &result))
 116          return 4.0;
 117       return result.u;
 118
 119    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 120       return 15.0;
 121
 122    default:
 123       debug_printf("Unexpected PIPE_CAPF_ query %u\n", param);
 124       return 0;
 125    }
 126 }
 127
 128
 129 static int
 130 svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
 131 {
 132    struct svga_screen *svgascreen = svga_screen(screen);
 133    struct svga_winsys_screen *sws = svgascreen->sws;
 134    SVGA3dDevCapResult result;
 135
 136    switch (param) {
 137    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
 138       return 16;
 139    case PIPE_CAP_NPOT_TEXTURES:
 140       return 1;
 141    case PIPE_CAP_TWO_SIDED_STENCIL:
 142       return 1;
 143    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 144       return 0;
 145    case PIPE_CAP_ANISOTROPIC_FILTER:
 146       return 1;
 147    case PIPE_CAP_POINT_SPRITE:
 148       return 1;
 149    case PIPE_CAP_MAX_RENDER_TARGETS:
 150       if(!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_RENDER_TARGETS, &result))
 151          return 1;
 152       if(!result.u)
 153          return 1;
 154       return MIN2(result.u, PIPE_MAX_COLOR_BUFS);
 155    case PIPE_CAP_OCCLUSION_QUERY:
 156       return 1;
 157    case PIPE_CAP_TIMER_QUERY:
 158       return 0;
 159    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 160       return 1;
 161    case PIPE_CAP_TEXTURE_SWIZZLE:
 162       return 1;
 163    case PIPE_CAP_USER_VERTEX_BUFFERS:
 164       return 0;
 165    case PIPE_CAP_USER_INDEX_BUFFERS:
 166    case PIPE_CAP_USER_CONSTANT_BUFFERS:
 167       return 1;
 168    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 169       return 16;
 170
 171    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 172       {
 173          unsigned levels = SVGA_MAX_TEXTURE_LEVELS;
 174          if (sws->get_cap(sws, SVGA3D_DEVCAP_MAX_TEXTURE_WIDTH, &result))
 175             levels = MIN2(util_logbase2(result.u) + 1, levels);
 176          else
 177             levels = 12 /* 2048x2048 */;
 178          if (sws->get_cap(sws, SVGA3D_DEVCAP_MAX_TEXTURE_HEIGHT, &result))
 179             levels = MIN2(util_logbase2(result.u) + 1, levels);
 180          else
 181             levels = 12 /* 2048x2048 */;
 182          return levels;
 183       }
 184
 185    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 186       if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_VOLUME_EXTENT, &result))
 187          return 8;  /* max 128x128x128 */
 188       return MIN2(util_logbase2(result.u) + 1, SVGA_MAX_TEXTURE_LEVELS);
 189
 190    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 191       /*
 192        * No mechanism to query the host, and at least limited to 2048x2048 on
 193        * certain hardware.
 194        */
 195       return MIN2(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
 196                   12 /* 2048x2048 */);
 197
 198    case PIPE_CAP_BLEND_EQUATION_SEPARATE: /* req. for GL 1.5 */
 199       return 1;
 200
 201    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 202    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 203       return 1;
 204    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 205    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 206       return 0;
 207
 208    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 209       return 1;
 210
 211    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 212       return 1; /* The color outputs of vertex shaders are not clamped */
 213    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 214       return 0; /* The driver can't clamp vertex colors */
 215    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 216       return 0; /* The driver can't clamp fragment colors */
 217
 218    /* Unsupported features */
 219    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 220    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 221    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 222    case PIPE_CAP_SM3:
 223    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 224    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 225    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 226    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 227    case PIPE_CAP_INDEP_BLEND_ENABLE:
 228    case PIPE_CAP_INDEP_BLEND_FUNC:
 229    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 230    case PIPE_CAP_PRIMITIVE_RESTART:
 231    case PIPE_CAP_TGSI_INSTANCEID:
 232    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 233    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 234    case PIPE_CAP_MIN_TEXEL_OFFSET:
 235    case PIPE_CAP_MAX_TEXEL_OFFSET:
 236    case PIPE_CAP_CONDITIONAL_RENDER:
 237    case PIPE_CAP_TEXTURE_BARRIER:
 238    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 239    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 240    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 241    case PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS:
 242    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 243    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 244       return 0;
 245
 246    default:
 247       debug_printf("Unexpected PIPE_CAP_ query %u\n", param);
 248       return 0;
 249    }
 250 }
 251
 252 static int svga_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 253 {
 254    struct svga_screen *svgascreen = svga_screen(screen);
 255    struct svga_winsys_screen *sws = svgascreen->sws;
 256    SVGA3dDevCapResult result;
 257
 258    switch (shader)
 259    {
 260    case PIPE_SHADER_FRAGMENT:
 261       switch (param)
 262       {
 263       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 264       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 265       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 266       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 267          return 512;
 268       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 269          return SVGA3D_MAX_NESTING_LEVEL;
 270       case PIPE_SHADER_CAP_MAX_INPUTS:
 271          return 10;
 272       case PIPE_SHADER_CAP_MAX_CONSTS:
 273          return 224;
 274       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 275          return 1;
 276       case PIPE_SHADER_CAP_MAX_TEMPS:
 277          if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_FRAGMENT_SHADER_TEMPS, &result))
 278             return 32;
 279          return MIN2(result.u, SVGA3D_TEMPREG_MAX);
 280       case PIPE_SHADER_CAP_MAX_ADDRS:
 281       case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 282          /*
 283           * Although PS 3.0 has some addressing abilities it can only represent
 284           * loops that can be statically determined and unrolled. Given we can
 285           * only handle a subset of the cases that the state tracker already
 286           * does it is better to defer loop unrolling to the state tracker.
 287           */
 288          return 0;
 289       case PIPE_SHADER_CAP_MAX_PREDS:
 290          return 1;
 291       case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 292          return 1;
 293       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 294       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 295       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 296          return 0;
 297       case PIPE_SHADER_CAP_SUBROUTINES:
 298          return 0;
 299       case PIPE_SHADER_CAP_INTEGERS:
 300          return 0;
 301       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 302          return 16;
 303       default:
 304          debug_printf("Unexpected vertex shader query %u\n", param);
 305          return 0;
 306       }
 307       break;
 308    case PIPE_SHADER_VERTEX:
 309       switch (param)
 310       {
 311       case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 312       case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 313          if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_VERTEX_SHADER_INSTRUCTIONS, &result))
 314             return 512;
 315          return result.u;
 316       case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 317       case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 318          /* XXX: until we have vertex texture support */
 319          return 0;
 320       case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 321          return SVGA3D_MAX_NESTING_LEVEL;
 322       case PIPE_SHADER_CAP_MAX_INPUTS:
 323          return 16;
 324       case PIPE_SHADER_CAP_MAX_CONSTS:
 325          return 256;
 326       case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 327          return 1;
 328       case PIPE_SHADER_CAP_MAX_TEMPS:
 329          if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_VERTEX_SHADER_TEMPS, &result))
 330             return 32;
 331          return MIN2(result.u, SVGA3D_TEMPREG_MAX);
 332       case PIPE_SHADER_CAP_MAX_ADDRS:
 333          return 1;
 334       case PIPE_SHADER_CAP_MAX_PREDS:
 335          return 1;
 336       case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 337          return 1;
 338       case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 339       case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 340          return 1;
 341       case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 342          return 0;
 343       case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 344          return 1;
 345       case PIPE_SHADER_CAP_SUBROUTINES:
 346          return 0;
 347       case PIPE_SHADER_CAP_INTEGERS:
 348          return 0;
 349       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 350          return 0;
 351       default:
 352          debug_printf("Unexpected vertex shader query %u\n", param);
 353          return 0;
 354       }
 355       break;
 356    case PIPE_SHADER_GEOMETRY:
 357       /* no support for geometry shaders at this time */
 358       return 0;
 359    default:
 360       debug_printf("Unexpected vertex shader query %u\n", param);
 361       return 0;
 362    }
 363    return 0;
 364 }
 365
 366
 367 static boolean
 368 svga_is_format_supported( struct pipe_screen *screen,
 369                           enum pipe_format format,
 370                           enum pipe_texture_target target,
 371                           unsigned sample_count,
 372                           unsigned tex_usage)
 373 {
 374    struct svga_screen *ss = svga_screen(screen);
 375    SVGA3dSurfaceFormat svga_format;
 376    SVGA3dSurfaceFormatCaps caps;
 377    SVGA3dSurfaceFormatCaps mask;
 378
 379    assert(tex_usage);
 380
 381    if (sample_count > 1) {
 382       return FALSE;
 383    }
 384
 385    svga_format = svga_translate_format(ss, format, tex_usage);
 386    if (svga_format == SVGA3D_FORMAT_INVALID) {
 387       return FALSE;
 388    }
 389
 390    /*
 391     * Override host capabilities, so that we end up with the same
 392     * visuals for all virtual hardware implementations.
 393     */
 394
 395    if (tex_usage & PIPE_BIND_DISPLAY_TARGET) {
 396       switch (svga_format) {
 397       case SVGA3D_A8R8G8B8:
 398       case SVGA3D_X8R8G8B8:
 399       case SVGA3D_R5G6B5:
 400          break;
 401
 402       /* Often unsupported/problematic. This means we end up with the same
 403        * visuals for all virtual hardware implementations.
 404        */
 405       case SVGA3D_A4R4G4B4:
 406       case SVGA3D_A1R5G5B5:
 407          return FALSE;
 408
 409       default:
 410          return FALSE;
 411       }
 412    }
 413
 414    /*
 415     * Query the host capabilities.
 416     */
 417
 418    svga_get_format_cap(ss, svga_format, &caps);
 419
 420    mask.value = 0;
 421    if (tex_usage & PIPE_BIND_RENDER_TARGET) {
 422       mask.offscreenRenderTarget = 1;
 423    }
 424    if (tex_usage & PIPE_BIND_DEPTH_STENCIL) {
 425       mask.zStencil = 1;
 426    }
 427    if (tex_usage & PIPE_BIND_SAMPLER_VIEW) {
 428       mask.texture = 1;
 429    }
 430
 431    return (caps.value & mask.value) == mask.value;
 432 }
 433
 434
 435 static void
 436 svga_fence_reference(struct pipe_screen *screen,
 437                      struct pipe_fence_handle **ptr,
 438                      struct pipe_fence_handle *fence)
 439 {
 440    struct svga_winsys_screen *sws = svga_screen(screen)->sws;
 441    sws->fence_reference(sws, ptr, fence);
 442 }
 443
 444
 445 static boolean
 446 svga_fence_signalled(struct pipe_screen *screen,
 447                      struct pipe_fence_handle *fence)
 448 {
 449    struct svga_winsys_screen *sws = svga_screen(screen)->sws;
 450    return sws->fence_signalled(sws, fence, 0) == 0;
 451 }
 452
 453
 454 static boolean
 455 svga_fence_finish(struct pipe_screen *screen,
 456                   struct pipe_fence_handle *fence,
 457                   uint64_t timeout)
 458 {
 459    struct svga_winsys_screen *sws = svga_screen(screen)->sws;
 460
 461    SVGA_DBG(DEBUG_DMA|DEBUG_PERF, "%s fence_ptr %p\n",
 462             __FUNCTION__, fence);
 463
 464    return sws->fence_finish(sws, fence, 0) == 0;
 465 }
 466
 467
 468 static void
 469 svga_destroy_screen( struct pipe_screen *screen )
 470 {
 471    struct svga_screen *svgascreen = svga_screen(screen);
 472
 473    svga_screen_cache_cleanup(svgascreen);
 474
 475    pipe_mutex_destroy(svgascreen->swc_mutex);
 476    pipe_mutex_destroy(svgascreen->tex_mutex);
 477
 478    svgascreen->sws->destroy(svgascreen->sws);
 479
 480    FREE(svgascreen);
 481 }
 482
 483
 484 /**
 485  * Create a new svga_screen object
 486  */
 487 struct pipe_screen *
 488 svga_screen_create(struct svga_winsys_screen *sws)
 489 {
 490    struct svga_screen *svgascreen;
 491    struct pipe_screen *screen;
 492    SVGA3dDevCapResult result;
 493    boolean use_vs30, use_ps30;
 494
 495 #ifdef DEBUG
 496    SVGA_DEBUG = debug_get_flags_option("SVGA_DEBUG", svga_debug_flags, 0 );
 497 #endif
 498
 499    svgascreen = CALLOC_STRUCT(svga_screen);
 500    if (!svgascreen)
 501       goto error1;
 502
 503    svgascreen->debug.force_level_surface_view =
 504       debug_get_bool_option("SVGA_FORCE_LEVEL_SURFACE_VIEW", FALSE);
 505    svgascreen->debug.force_surface_view =
 506       debug_get_bool_option("SVGA_FORCE_SURFACE_VIEW", FALSE);
 507    svgascreen->debug.force_sampler_view =
 508       debug_get_bool_option("SVGA_FORCE_SAMPLER_VIEW", FALSE);
 509    svgascreen->debug.no_surface_view =
 510       debug_get_bool_option("SVGA_NO_SURFACE_VIEW", FALSE);
 511    svgascreen->debug.no_sampler_view =
 512       debug_get_bool_option("SVGA_NO_SAMPLER_VIEW", FALSE);
 513
 514    screen = &svgascreen->screen;
 515
 516    screen->destroy = svga_destroy_screen;
 517    screen->get_name = svga_get_name;
 518    screen->get_vendor = svga_get_vendor;
 519    screen->get_param = svga_get_param;
 520    screen->get_shader_param = svga_get_shader_param;
 521    screen->get_paramf = svga_get_paramf;
 522    screen->is_format_supported = svga_is_format_supported;
 523    screen->context_create = svga_context_create;
 524    screen->fence_reference = svga_fence_reference;
 525    screen->fence_signalled = svga_fence_signalled;
 526    screen->fence_finish = svga_fence_finish;
 527    svgascreen->sws = sws;
 528
 529    svga_init_screen_resource_functions(svgascreen);
 530
 531    if (sws->get_hw_version) {
 532       svgascreen->hw_version = sws->get_hw_version(sws);
 533    } else {
 534       svgascreen->hw_version = SVGA3D_HWVERSION_WS65_B1;
 535    }
 536
 537    use_ps30 =
 538       sws->get_cap(sws, SVGA3D_DEVCAP_FRAGMENT_SHADER_VERSION, &result) &&
 539       result.u >= SVGA3DPSVERSION_30 ? TRUE : FALSE;
 540
 541    use_vs30 =
 542       sws->get_cap(sws, SVGA3D_DEVCAP_VERTEX_SHADER_VERSION, &result) &&
 543       result.u >= SVGA3DVSVERSION_30 ? TRUE : FALSE;
 544
 545    /* we require Shader model 3.0 or later */
 546    if (!use_ps30 || !use_vs30)
 547       goto error2;
 548
 549    /*
 550     * The D16, D24X8, and D24S8 formats always do an implicit shadow compare
 551     * when sampled from, where as the DF16, DF24, and D24S8_INT do not.  So
 552     * we prefer the later when available.
 553     *
 554     * This mimics hardware vendors extensions for D3D depth sampling. See also
 555     * http://aras-p.info/texts/D3D9GPUHacks.html
 556     */
 557
 558    {
 559       boolean has_df16, has_df24, has_d24s8_int;
 560       SVGA3dSurfaceFormatCaps caps;
 561       SVGA3dSurfaceFormatCaps mask;
 562       mask.value = 0;
 563       mask.zStencil = 1;
 564       mask.texture = 1;
 565
 566       svgascreen->depth.z16 = SVGA3D_Z_D16;
 567       svgascreen->depth.x8z24 = SVGA3D_Z_D24X8;
 568       svgascreen->depth.s8z24 = SVGA3D_Z_D24S8;
 569
 570       svga_get_format_cap(svgascreen, SVGA3D_Z_DF16, &caps);
 571       has_df16 = (caps.value & mask.value) == mask.value;
 572
 573       svga_get_format_cap(svgascreen, SVGA3D_Z_DF24, &caps);
 574       has_df24 = (caps.value & mask.value) == mask.value;
 575
 576       svga_get_format_cap(svgascreen, SVGA3D_Z_D24S8_INT, &caps);
 577       has_d24s8_int = (caps.value & mask.value) == mask.value;
 578
 579       /* XXX: We might want some other logic here.
 580        * Like if we only have d24s8_int we should
 581        * emulate the other formats with that.
 582        */
 583       if (has_df16) {
 584          svgascreen->depth.z16 = SVGA3D_Z_DF16;
 585       }
 586       if (has_df24) {
 587          svgascreen->depth.x8z24 = SVGA3D_Z_DF24;
 588       }
 589       if (has_d24s8_int) {
 590          svgascreen->depth.s8z24 = SVGA3D_Z_D24S8_INT;
 591       }
 592    }
 593
 594    if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_POINT_SIZE, &result)) {
 595       svgascreen->maxPointSize = 1.0F;
 596    } else {
 597       /* Keep this to a reasonable size to avoid failures in
 598        * conform/pntaa.c:
 599        */
 600       svgascreen->maxPointSize = MIN2(result.f, 80.0f);
 601    }
 602
 603    pipe_mutex_init(svgascreen->tex_mutex);
 604    pipe_mutex_init(svgascreen->swc_mutex);
 605
 606    svga_screen_cache_init(svgascreen);
 607
 608    return screen;
 609 error2:
 610    FREE(svgascreen);
 611 error1:
 612    return NULL;
 613 }
 614
 615 struct svga_winsys_screen *
 616 svga_winsys_screen(struct pipe_screen *screen)
 617 {
 618    return svga_screen(screen)->sws;
 619 }
 620
 621 #ifdef DEBUG
 622 struct svga_screen *
 623 svga_screen(struct pipe_screen *screen)
 624 {
 625    assert(screen);
 626    assert(screen->destroy == svga_destroy_screen);
 627    return (struct svga_screen *)screen;
 628 }
 629 #endif