src/gallium/drivers/llvmpipe/lp_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "util/u_memory.h"
  30 #include "util/u_math.h"
  31 #include "util/u_cpu_detect.h"
  32 #include "util/u_format.h"
  33 #include "util/u_string.h"
  34 #include "util/u_format_s3tc.h"
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_screen.h"
  37 #include "draw/draw_context.h"
  38 #include "gallivm/lp_bld_type.h"
  39
  40 #include "os/os_misc.h"
  41 #include "os/os_time.h"
  42 #include "lp_texture.h"
  43 #include "lp_fence.h"
  44 #include "lp_jit.h"
  45 #include "lp_screen.h"
  46 #include "lp_context.h"
  47 #include "lp_debug.h"
  48 #include "lp_public.h"
  49 #include "lp_limits.h"
  50 #include "lp_rast.h"
  51
  52 #include "state_tracker/sw_winsys.h"
  53
  54 #ifdef DEBUG
  55 int LP_DEBUG = 0;
  56
  57 static const struct debug_named_value lp_debug_flags[] = {
  58    { "pipe",   DEBUG_PIPE, NULL },
  59    { "tgsi",   DEBUG_TGSI, NULL },
  60    { "tex",    DEBUG_TEX, NULL },
  61    { "setup",  DEBUG_SETUP, NULL },
  62    { "rast",   DEBUG_RAST, NULL },
  63    { "query",  DEBUG_QUERY, NULL },
  64    { "screen", DEBUG_SCREEN, NULL },
  65    { "counters", DEBUG_COUNTERS, NULL },
  66    { "scene", DEBUG_SCENE, NULL },
  67    { "fence", DEBUG_FENCE, NULL },
  68    { "mem", DEBUG_MEM, NULL },
  69    { "fs", DEBUG_FS, NULL },
  70    DEBUG_NAMED_VALUE_END
  71 };
  72 #endif
  73
  74 int LP_PERF = 0;
  75 static const struct debug_named_value lp_perf_flags[] = {
  76    { "texmem",         PERF_TEX_MEM, NULL },
  77    { "no_mipmap",      PERF_NO_MIPMAPS, NULL },
  78    { "no_linear",      PERF_NO_LINEAR, NULL },
  79    { "no_mip_linear",  PERF_NO_MIP_LINEAR, NULL },
  80    { "no_tex",         PERF_NO_TEX, NULL },
  81    { "no_blend",       PERF_NO_BLEND, NULL },
  82    { "no_depth",       PERF_NO_DEPTH, NULL },
  83    { "no_alphatest",   PERF_NO_ALPHATEST, NULL },
  84    DEBUG_NAMED_VALUE_END
  85 };
  86
  87
  88 static const char *
  89 llvmpipe_get_vendor(struct pipe_screen *screen)
  90 {
  91    return "VMware, Inc.";
  92 }
  93
  94
  95 static const char *
  96 llvmpipe_get_name(struct pipe_screen *screen)
  97 {
  98    static char buf[100];
  99    util_snprintf(buf, sizeof(buf), "llvmpipe (LLVM %u.%u, %u bits)",
 100                  HAVE_LLVM >> 8, HAVE_LLVM & 0xff,
 101                  lp_native_vector_width );
 102    return buf;
 103 }
 104
 105
 106 static int
 107 llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
 108 {
 109    switch (param) {
 110    case PIPE_CAP_NPOT_TEXTURES:
 111    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 112       return 1;
 113    case PIPE_CAP_TWO_SIDED_STENCIL:
 114       return 1;
 115    case PIPE_CAP_SM3:
 116       return 1;
 117    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 118       return 1;
 119    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 120       return PIPE_MAX_SO_BUFFERS;
 121    case PIPE_CAP_ANISOTROPIC_FILTER:
 122       return 0;
 123    case PIPE_CAP_POINT_SPRITE:
 124       return 1;
 125    case PIPE_CAP_MAX_RENDER_TARGETS:
 126       return PIPE_MAX_COLOR_BUFS;
 127    case PIPE_CAP_OCCLUSION_QUERY:
 128       return 1;
 129    case PIPE_CAP_QUERY_TIME_ELAPSED:
 130       return 0;
 131    case PIPE_CAP_QUERY_TIMESTAMP:
 132       return 1;
 133    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 134       return 0;
 135    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 136       return 1;
 137    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 138       return 1;
 139    case PIPE_CAP_TEXTURE_SWIZZLE:
 140       return 1;
 141    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 142       return 0;
 143    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 144       return LP_MAX_TEXTURE_2D_LEVELS;
 145    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 146       return LP_MAX_TEXTURE_3D_LEVELS;
 147    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 148       return LP_MAX_TEXTURE_CUBE_LEVELS;
 149    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 150       return LP_MAX_TEXTURE_ARRAY_LAYERS;
 151    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 152       return 1;
 153    case PIPE_CAP_INDEP_BLEND_ENABLE:
 154       return 1;
 155    case PIPE_CAP_INDEP_BLEND_FUNC:
 156       return 1;
 157    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 158    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 159    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 160       return 1;
 161    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 162       return 0;
 163    case PIPE_CAP_PRIMITIVE_RESTART:
 164       return 1;
 165    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 166       return 1;
 167    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 168       return 1;
 169    case PIPE_CAP_TGSI_INSTANCEID:
 170    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 171    case PIPE_CAP_START_INSTANCE:
 172       return 1;
 173    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 174       return 0;
 175    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 176       return 1;
 177    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 178    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 179       return 1;
 180    /* this is a lie could support arbitrary large offsets */
 181    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 182    case PIPE_CAP_MIN_TEXEL_OFFSET:
 183       return -32;
 184    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 185    case PIPE_CAP_MAX_TEXEL_OFFSET:
 186       return 31;
 187    case PIPE_CAP_CONDITIONAL_RENDER:
 188       return 1;
 189    case PIPE_CAP_TEXTURE_BARRIER:
 190       return 0;
 191    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 192    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 193       return 16*4;
 194    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 195    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 196       return 1024;
 197    case PIPE_CAP_MAX_VERTEX_STREAMS:
 198       return 1;
 199    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 200       return 2048;
 201    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 202       return 1;
 203    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 204       return 0;
 205    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 206    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 207       return 1;
 208    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 209       return 330;
 210    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 211       return 0;
 212    case PIPE_CAP_COMPUTE:
 213       return 0;
 214    case PIPE_CAP_USER_VERTEX_BUFFERS:
 215    case PIPE_CAP_USER_INDEX_BUFFERS:
 216       return 1;
 217    case PIPE_CAP_USER_CONSTANT_BUFFERS:
 218       return 0;
 219    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 220    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 221    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 222    case PIPE_CAP_TGSI_TEXCOORD:
 223       return 0;
 224    case PIPE_CAP_DRAW_INDIRECT:
 225       return 1;
 226
 227    case PIPE_CAP_CUBE_MAP_ARRAY:
 228       return 1;
 229    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 230       return 16;
 231    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 232       return 0;
 233    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 234       return 64;
 235    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 236       return 1;
 237    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 238       return 65536;
 239    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 240       return 1;
 241    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 242       return 0;
 243    case PIPE_CAP_MAX_VIEWPORTS:
 244       return PIPE_MAX_VIEWPORTS;
 245    case PIPE_CAP_ENDIANNESS:
 246       return PIPE_ENDIAN_NATIVE;
 247    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 248       return 1;
 249    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 250       return 1;
 251    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 252       return 4;
 253    case PIPE_CAP_TEXTURE_GATHER_SM5:
 254    case PIPE_CAP_TEXTURE_QUERY_LOD:
 255    case PIPE_CAP_SAMPLE_SHADING:
 256    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 257       return 0;
 258    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 259       return 1;
 260    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 261       return 0;
 262    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 263       return 1;
 264    case PIPE_CAP_FAKE_SW_MSAA:
 265       return 1;
 266    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 267       return 1;
 268
 269    case PIPE_CAP_VENDOR_ID:
 270       return 0xFFFFFFFF;
 271    case PIPE_CAP_DEVICE_ID:
 272       return 0xFFFFFFFF;
 273    case PIPE_CAP_ACCELERATED:
 274       return 0;
 275    case PIPE_CAP_VIDEO_MEMORY: {
 276       /* XXX: Do we want to return the full amount fo system memory ? */
 277       uint64_t system_memory;
 278
 279       if (!os_get_total_physical_memory(&system_memory))
 280          return 0;
 281
 282       return (int)(system_memory >> 20);
 283    }
 284    case PIPE_CAP_UMA:
 285       return 0;
 286    case PIPE_CAP_CLIP_HALFZ:
 287       return 1;
 288    case PIPE_CAP_VERTEXID_NOBASE:
 289       return 0;
 290    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 291    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 292    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 293       return 1;
 294    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 295    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 296    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 297    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 298    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 299    case PIPE_CAP_TGSI_TXQS:
 300    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 301    case PIPE_CAP_SHAREABLE_SHADERS:
 302    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 303    case PIPE_CAP_CLEAR_TEXTURE:
 304    case PIPE_CAP_DRAW_PARAMETERS:
 305    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 306       return 0;
 307    }
 308    /* should only get here on unhandled cases */
 309    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 310    return 0;
 311 }
 312
 313 static int
 314 llvmpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 315 {
 316    switch(shader)
 317    {
 318    case PIPE_SHADER_FRAGMENT:
 319       switch (param) {
 320       default:
 321          return gallivm_get_shader_param(param);
 322       }
 323    case PIPE_SHADER_VERTEX:
 324    case PIPE_SHADER_GEOMETRY:
 325       switch (param) {
 326       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 327          /* At this time, the draw module and llvmpipe driver only
 328           * support vertex shader texture lookups when LLVM is enabled in
 329           * the draw module.
 330           */
 331          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 332             return PIPE_MAX_SAMPLERS;
 333          else
 334             return 0;
 335       case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 336          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 337             return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 338          else
 339             return 0;
 340       default:
 341          return draw_get_shader_param(shader, param);
 342       }
 343    default:
 344       return 0;
 345    }
 346 }
 347
 348 static float
 349 llvmpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 350 {
 351    switch (param) {
 352    case PIPE_CAPF_MAX_LINE_WIDTH:
 353       /* fall-through */
 354    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 355       return 255.0; /* arbitrary */
 356    case PIPE_CAPF_MAX_POINT_WIDTH:
 357       /* fall-through */
 358    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 359       return 255.0; /* arbitrary */
 360    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 361       return 16.0; /* not actually signficant at this time */
 362    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 363       return 16.0; /* arbitrary */
 364    case PIPE_CAPF_GUARD_BAND_LEFT:
 365    case PIPE_CAPF_GUARD_BAND_TOP:
 366    case PIPE_CAPF_GUARD_BAND_RIGHT:
 367    case PIPE_CAPF_GUARD_BAND_BOTTOM:
 368       return 0.0;
 369    }
 370    /* should only get here on unhandled cases */
 371    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 372    return 0.0;
 373 }
 374
 375
 376 /**
 377  * Query format support for creating a texture, drawing surface, etc.
 378  * \param format  the format to test
 379  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 380  */
 381 static boolean
 382 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 383                               enum pipe_format format,
 384                               enum pipe_texture_target target,
 385                               unsigned sample_count,
 386                               unsigned bind)
 387 {
 388    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 389    struct sw_winsys *winsys = screen->winsys;
 390    const struct util_format_description *format_desc;
 391
 392    format_desc = util_format_description(format);
 393    if (!format_desc)
 394       return FALSE;
 395
 396    assert(target == PIPE_BUFFER ||
 397           target == PIPE_TEXTURE_1D ||
 398           target == PIPE_TEXTURE_1D_ARRAY ||
 399           target == PIPE_TEXTURE_2D ||
 400           target == PIPE_TEXTURE_2D_ARRAY ||
 401           target == PIPE_TEXTURE_RECT ||
 402           target == PIPE_TEXTURE_3D ||
 403           target == PIPE_TEXTURE_CUBE ||
 404           target == PIPE_TEXTURE_CUBE_ARRAY);
 405
 406    if (sample_count > 1)
 407       return FALSE;
 408
 409    if (bind & PIPE_BIND_RENDER_TARGET) {
 410       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
 411          /* this is a lie actually other formats COULD exist where we would fail */
 412          if (format_desc->nr_channels < 3)
 413             return FALSE;
 414       }
 415       else if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB)
 416          return FALSE;
 417
 418       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN &&
 419           format != PIPE_FORMAT_R11G11B10_FLOAT)
 420          return FALSE;
 421
 422       assert(format_desc->block.width == 1);
 423       assert(format_desc->block.height == 1);
 424
 425       if (format_desc->is_mixed)
 426          return FALSE;
 427
 428       if (!format_desc->is_array && !format_desc->is_bitmask &&
 429           format != PIPE_FORMAT_R11G11B10_FLOAT)
 430          return FALSE;
 431
 432       /*
 433        * XXX refuse formats known to crash in generate_unswizzled_blend().
 434        * These include all 3-channel 24bit RGB8 variants, plus 48bit
 435        * (except those using floats) 3-channel RGB16 variants (the latter
 436        * seems to be more of a llvm bug though).
 437        * The mesa state tracker only seems to use these for SINT/UINT formats.
 438        */
 439       if (format_desc->is_array && format_desc->nr_channels == 3) {
 440          if (format_desc->block.bits == 24 || (format_desc->block.bits == 48 &&
 441                !util_format_is_float(format))) {
 442             return FALSE;
 443          }
 444       }
 445    }
 446
 447    if (bind & PIPE_BIND_DISPLAY_TARGET) {
 448       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 449          return FALSE;
 450    }
 451
 452    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 453       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 454          return FALSE;
 455
 456       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 457          return FALSE;
 458
 459       /* TODO: Support stencil-only formats */
 460       if (format_desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_NONE) {
 461          return FALSE;
 462       }
 463    }
 464
 465    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC ||
 466        format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
 467       /* Software decoding is not hooked up. */
 468       return FALSE;
 469    }
 470
 471    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 472        format != PIPE_FORMAT_ETC1_RGB8)
 473       return FALSE;
 474
 475    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 476       return util_format_s3tc_enabled;
 477    }
 478
 479    /*
 480     * Everything can be supported by u_format
 481     * (those without fetch_rgba_float might be not but shouldn't hit that)
 482     */
 483
 484    return TRUE;
 485 }
 486
 487
 488
 489
 490 static void
 491 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 492                            struct pipe_resource *resource,
 493                            unsigned level, unsigned layer,
 494                            void *context_private,
 495                            struct pipe_box *sub_box)
 496 {
 497    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 498    struct sw_winsys *winsys = screen->winsys;
 499    struct llvmpipe_resource *texture = llvmpipe_resource(resource);
 500
 501    assert(texture->dt);
 502    if (texture->dt)
 503       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 504 }
 505
 506 static void
 507 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 508 {
 509    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 510    struct sw_winsys *winsys = screen->winsys;
 511
 512    if (screen->rast)
 513       lp_rast_destroy(screen->rast);
 514
 515    lp_jit_screen_cleanup(screen);
 516
 517    if(winsys->destroy)
 518       winsys->destroy(winsys);
 519
 520    pipe_mutex_destroy(screen->rast_mutex);
 521
 522    FREE(screen);
 523 }
 524
 525
 526
 527
 528 /**
 529  * Fence reference counting.
 530  */
 531 static void
 532 llvmpipe_fence_reference(struct pipe_screen *screen,
 533                          struct pipe_fence_handle **ptr,
 534                          struct pipe_fence_handle *fence)
 535 {
 536    struct lp_fence **old = (struct lp_fence **) ptr;
 537    struct lp_fence *f = (struct lp_fence *) fence;
 538
 539    lp_fence_reference(old, f);
 540 }
 541
 542
 543 /**
 544  * Wait for the fence to finish.
 545  */
 546 static boolean
 547 llvmpipe_fence_finish(struct pipe_screen *screen,
 548                       struct pipe_fence_handle *fence_handle,
 549                       uint64_t timeout)
 550 {
 551    struct lp_fence *f = (struct lp_fence *) fence_handle;
 552
 553    if (!timeout)
 554       return lp_fence_signalled(f);
 555
 556    lp_fence_wait(f);
 557    return TRUE;
 558 }
 559
 560 static uint64_t
 561 llvmpipe_get_timestamp(struct pipe_screen *_screen)
 562 {
 563    return os_time_get_nano();
 564 }
 565
 566 /**
 567  * Create a new pipe_screen object
 568  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 569  */
 570 struct pipe_screen *
 571 llvmpipe_create_screen(struct sw_winsys *winsys)
 572 {
 573    struct llvmpipe_screen *screen;
 574
 575    util_cpu_detect();
 576
 577 #ifdef DEBUG
 578    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 579 #endif
 580
 581    LP_PERF = debug_get_flags_option("LP_PERF", lp_perf_flags, 0 );
 582
 583    screen = CALLOC_STRUCT(llvmpipe_screen);
 584    if (!screen)
 585       return NULL;
 586
 587    if (!lp_jit_screen_init(screen)) {
 588       FREE(screen);
 589       return NULL;
 590    }
 591
 592    screen->winsys = winsys;
 593
 594    screen->base.destroy = llvmpipe_destroy_screen;
 595
 596    screen->base.get_name = llvmpipe_get_name;
 597    screen->base.get_vendor = llvmpipe_get_vendor;
 598    screen->base.get_device_vendor = llvmpipe_get_vendor; // TODO should be the CPU vendor
 599    screen->base.get_param = llvmpipe_get_param;
 600    screen->base.get_shader_param = llvmpipe_get_shader_param;
 601    screen->base.get_paramf = llvmpipe_get_paramf;
 602    screen->base.is_format_supported = llvmpipe_is_format_supported;
 603
 604    screen->base.context_create = llvmpipe_create_context;
 605    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 606    screen->base.fence_reference = llvmpipe_fence_reference;
 607    screen->base.fence_finish = llvmpipe_fence_finish;
 608
 609    screen->base.get_timestamp = llvmpipe_get_timestamp;
 610
 611    llvmpipe_init_screen_resource_funcs(&screen->base);
 612
 613    screen->num_threads = util_cpu_caps.nr_cpus > 1 ? util_cpu_caps.nr_cpus : 0;
 614 #ifdef PIPE_SUBSYSTEM_EMBEDDED
 615    screen->num_threads = 0;
 616 #endif
 617    screen->num_threads = debug_get_num_option("LP_NUM_THREADS", screen->num_threads);
 618    screen->num_threads = MIN2(screen->num_threads, LP_MAX_THREADS);
 619
 620    screen->rast = lp_rast_create(screen->num_threads);
 621    if (!screen->rast) {
 622       lp_jit_screen_cleanup(screen);
 623       FREE(screen);
 624       return NULL;
 625    }
 626    pipe_mutex_init(screen->rast_mutex);
 627
 628    util_format_s3tc_init();
 629
 630    return &screen->base;
 631 }