src/gallium/drivers/softpipe/sp_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_format.h"
  31 #include "util/u_format_s3tc.h"
  32 #include "util/u_video.h"
  33 #include "os/os_misc.h"
  34 #include "os/os_time.h"
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_screen.h"
  37 #include "draw/draw_context.h"
  38
  39 #include "state_tracker/sw_winsys.h"
  40 #include "tgsi/tgsi_exec.h"
  41
  42 #include "sp_texture.h"
  43 #include "sp_screen.h"
  44 #include "sp_context.h"
  45 #include "sp_fence.h"
  46 #include "sp_public.h"
  47
  48 DEBUG_GET_ONCE_BOOL_OPTION(use_llvm, "SOFTPIPE_USE_LLVM", FALSE)
  49
  50 static const char *
  51 softpipe_get_vendor(struct pipe_screen *screen)
  52 {
  53    return "VMware, Inc.";
  54 }
  55
  56
  57 static const char *
  58 softpipe_get_name(struct pipe_screen *screen)
  59 {
  60    return "softpipe";
  61 }
  62
  63
  64 static int
  65 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  66 {
  67    switch (param) {
  68    case PIPE_CAP_NPOT_TEXTURES:
  69    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
  70       return 1;
  71    case PIPE_CAP_TWO_SIDED_STENCIL:
  72       return 1;
  73    case PIPE_CAP_SM3:
  74       return 1;
  75    case PIPE_CAP_ANISOTROPIC_FILTER:
  76       return 1;
  77    case PIPE_CAP_POINT_SPRITE:
  78       return 1;
  79    case PIPE_CAP_MAX_RENDER_TARGETS:
  80       return PIPE_MAX_COLOR_BUFS;
  81    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  82       return 1;
  83    case PIPE_CAP_OCCLUSION_QUERY:
  84       return 1;
  85    case PIPE_CAP_QUERY_TIME_ELAPSED:
  86       return 1;
  87    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
  88       return 1;
  89    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  90       return 1;
  91    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  92       return 1;
  93    case PIPE_CAP_TEXTURE_SWIZZLE:
  94       return 1;
  95    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
  96       return 0;
  97    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  98       return SP_MAX_TEXTURE_2D_LEVELS;
  99    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 100       return SP_MAX_TEXTURE_3D_LEVELS;
 101    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 102       return SP_MAX_TEXTURE_CUBE_LEVELS;
 103    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 104       return 1;
 105    case PIPE_CAP_INDEP_BLEND_ENABLE:
 106       return 1;
 107    case PIPE_CAP_INDEP_BLEND_FUNC:
 108       return 1;
 109    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 110    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 111    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 112    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 113       return 1;
 114    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 115       return 1;
 116    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 117       return PIPE_MAX_SO_BUFFERS;
 118    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 119    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 120       return 16*4;
 121    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 122    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 123       return 1024;
 124    case PIPE_CAP_MAX_VERTEX_STREAMS:
 125       return 1;
 126    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 127       return 2048;
 128    case PIPE_CAP_PRIMITIVE_RESTART:
 129       return 1;
 130    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 131       return 1;
 132    case PIPE_CAP_TGSI_INSTANCEID:
 133    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 134    case PIPE_CAP_START_INSTANCE:
 135       return 1;
 136    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 137    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 138       return 1;
 139    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 140       return 256; /* for GL3 */
 141    case PIPE_CAP_MIN_TEXEL_OFFSET:
 142       return -8;
 143    case PIPE_CAP_MAX_TEXEL_OFFSET:
 144       return 7;
 145    case PIPE_CAP_CONDITIONAL_RENDER:
 146       return 1;
 147    case PIPE_CAP_TEXTURE_BARRIER:
 148       return 0;
 149    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 150    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: /* draw module */
 151    case PIPE_CAP_VERTEX_COLOR_CLAMPED: /* draw module */
 152       return 1;
 153    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 154       return 0;
 155    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 156       return 330;
 157    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 158       return 0;
 159    case PIPE_CAP_COMPUTE:
 160       return 1;
 161    case PIPE_CAP_USER_VERTEX_BUFFERS:
 162    case PIPE_CAP_USER_INDEX_BUFFERS:
 163    case PIPE_CAP_USER_CONSTANT_BUFFERS:
 164    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 165    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 166       return 1;
 167    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 168       return 16;
 169    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 170    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 171    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 172    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 173    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 174       return 0;
 175    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 176       return 64;
 177    case PIPE_CAP_QUERY_TIMESTAMP:
 178    case PIPE_CAP_CUBE_MAP_ARRAY:
 179       return 1;
 180    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 181       return 1;
 182    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 183       return 0;
 184    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 185       return 65536;
 186    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 187       return 0;
 188    case PIPE_CAP_TGSI_TEXCOORD:
 189    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 190       return 0;
 191    case PIPE_CAP_MAX_VIEWPORTS:
 192       return PIPE_MAX_VIEWPORTS;
 193    case PIPE_CAP_ENDIANNESS:
 194       return PIPE_ENDIAN_NATIVE;
 195    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 196       return 4;
 197    case PIPE_CAP_TEXTURE_GATHER_SM5:
 198    case PIPE_CAP_TEXTURE_QUERY_LOD:
 199       return 1;
 200    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 201    case PIPE_CAP_SAMPLE_SHADING:
 202    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 203       return 0;
 204    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 205       return 1;
 206    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 207       return 0;
 208    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 209       return 1;
 210    case PIPE_CAP_FAKE_SW_MSAA:
 211       return 1;
 212    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 213       return -32;
 214    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 215       return 31;
 216    case PIPE_CAP_DRAW_INDIRECT:
 217       return 1;
 218
 219    case PIPE_CAP_VENDOR_ID:
 220       return 0xFFFFFFFF;
 221    case PIPE_CAP_DEVICE_ID:
 222       return 0xFFFFFFFF;
 223    case PIPE_CAP_ACCELERATED:
 224       return 0;
 225    case PIPE_CAP_VIDEO_MEMORY: {
 226       /* XXX: Do we want to return the full amount fo system memory ? */
 227       uint64_t system_memory;
 228
 229       if (!os_get_total_physical_memory(&system_memory))
 230          return 0;
 231
 232       return (int)(system_memory >> 20);
 233    }
 234    case PIPE_CAP_UMA:
 235       return 0;
 236    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 237       return 1;
 238    case PIPE_CAP_CLIP_HALFZ:
 239    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 240    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 241       return 1;
 242    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 243       return 1;
 244    case PIPE_CAP_VERTEXID_NOBASE:
 245       return 0;
 246    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 247       return 0;
 248    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 249    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 250    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 251    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 252    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 253    case PIPE_CAP_TGSI_TXQS:
 254    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 255    case PIPE_CAP_SHAREABLE_SHADERS:
 256    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 257    case PIPE_CAP_CLEAR_TEXTURE:
 258    case PIPE_CAP_DRAW_PARAMETERS:
 259    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 260    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 261    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 262    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 263    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 264    case PIPE_CAP_INVALIDATE_BUFFER:
 265    case PIPE_CAP_GENERATE_MIPMAP:
 266    case PIPE_CAP_STRING_MARKER:
 267    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 268    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 269    case PIPE_CAP_QUERY_MEMORY_INFO:
 270    case PIPE_CAP_PCI_GROUP:
 271    case PIPE_CAP_PCI_BUS:
 272    case PIPE_CAP_PCI_DEVICE:
 273    case PIPE_CAP_PCI_FUNCTION:
 274    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 275       return 0;
 276    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 277       return 4;
 278    }
 279    /* should only get here on unhandled cases */
 280    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 281    return 0;
 282 }
 283
 284 static int
 285 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 286 {
 287    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 288    switch(shader)
 289    {
 290    case PIPE_SHADER_FRAGMENT:
 291       return tgsi_exec_get_shader_param(param);
 292    case PIPE_SHADER_COMPUTE:
 293       return tgsi_exec_get_shader_param(param);
 294    case PIPE_SHADER_VERTEX:
 295    case PIPE_SHADER_GEOMETRY:
 296       if (sp_screen->use_llvm)
 297          return draw_get_shader_param(shader, param);
 298       else
 299          return draw_get_shader_param_no_llvm(shader, param);
 300    default:
 301       return 0;
 302    }
 303 }
 304
 305 static float
 306 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 307 {
 308    switch (param) {
 309    case PIPE_CAPF_MAX_LINE_WIDTH:
 310       /* fall-through */
 311    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 312       return 255.0; /* arbitrary */
 313    case PIPE_CAPF_MAX_POINT_WIDTH:
 314       /* fall-through */
 315    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 316       return 255.0; /* arbitrary */
 317    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 318       return 16.0;
 319    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 320       return 16.0; /* arbitrary */
 321    case PIPE_CAPF_GUARD_BAND_LEFT:
 322    case PIPE_CAPF_GUARD_BAND_TOP:
 323    case PIPE_CAPF_GUARD_BAND_RIGHT:
 324    case PIPE_CAPF_GUARD_BAND_BOTTOM:
 325       return 0.0;
 326    }
 327    /* should only get here on unhandled cases */
 328    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 329    return 0.0;
 330 }
 331
 332 /**
 333  * Query format support for creating a texture, drawing surface, etc.
 334  * \param format  the format to test
 335  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 336  */
 337 static boolean
 338 softpipe_is_format_supported( struct pipe_screen *screen,
 339                               enum pipe_format format,
 340                               enum pipe_texture_target target,
 341                               unsigned sample_count,
 342                               unsigned bind)
 343 {
 344    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 345    const struct util_format_description *format_desc;
 346
 347    assert(target == PIPE_BUFFER ||
 348           target == PIPE_TEXTURE_1D ||
 349           target == PIPE_TEXTURE_1D_ARRAY ||
 350           target == PIPE_TEXTURE_2D ||
 351           target == PIPE_TEXTURE_2D_ARRAY ||
 352           target == PIPE_TEXTURE_RECT ||
 353           target == PIPE_TEXTURE_3D ||
 354           target == PIPE_TEXTURE_CUBE ||
 355           target == PIPE_TEXTURE_CUBE_ARRAY);
 356
 357    format_desc = util_format_description(format);
 358    if (!format_desc)
 359       return FALSE;
 360
 361    if (sample_count > 1)
 362       return FALSE;
 363
 364    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 365                PIPE_BIND_SCANOUT |
 366                PIPE_BIND_SHARED)) {
 367       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 368          return FALSE;
 369    }
 370
 371    if (bind & PIPE_BIND_RENDER_TARGET) {
 372       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 373          return FALSE;
 374
 375       /*
 376        * Although possible, it is unnatural to render into compressed or YUV
 377        * surfaces. So disable these here to avoid going into weird paths
 378        * inside the state trackers.
 379        */
 380       if (format_desc->block.width != 1 ||
 381           format_desc->block.height != 1)
 382          return FALSE;
 383    }
 384
 385    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 386       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 387          return FALSE;
 388    }
 389
 390    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC ||
 391        format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
 392       /* Software decoding is not hooked up. */
 393       return FALSE;
 394    }
 395
 396    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 397        format != PIPE_FORMAT_ETC1_RGB8)
 398       return FALSE;
 399
 400    /*
 401     * All other operations (sampling, transfer, etc).
 402     */
 403
 404    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 405       return util_format_s3tc_enabled;
 406    }
 407
 408    /*
 409     * Everything else should be supported by u_format.
 410     */
 411    return TRUE;
 412 }
 413
 414
 415 static void
 416 softpipe_destroy_screen( struct pipe_screen *screen )
 417 {
 418    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 419    struct sw_winsys *winsys = sp_screen->winsys;
 420
 421    if(winsys->destroy)
 422       winsys->destroy(winsys);
 423
 424    FREE(screen);
 425 }
 426
 427
 428 /* This is often overriden by the co-state tracker.
 429  */
 430 static void
 431 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 432                            struct pipe_resource *resource,
 433                            unsigned level, unsigned layer,
 434                            void *context_private,
 435                            struct pipe_box *sub_box)
 436 {
 437    struct softpipe_screen *screen = softpipe_screen(_screen);
 438    struct sw_winsys *winsys = screen->winsys;
 439    struct softpipe_resource *texture = softpipe_resource(resource);
 440
 441    assert(texture->dt);
 442    if (texture->dt)
 443       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 444 }
 445
 446 static uint64_t
 447 softpipe_get_timestamp(struct pipe_screen *_screen)
 448 {
 449    return os_time_get_nano();
 450 }
 451
 452 static int
 453 softpipe_get_compute_param(struct pipe_screen *_screen,
 454                            enum pipe_shader_ir ir_type,
 455                            enum pipe_compute_cap param,
 456                            void *ret)
 457 {
 458    switch (param) {
 459    case PIPE_COMPUTE_CAP_IR_TARGET:
 460       return 0;
 461    case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
 462       if (ret) {
 463          uint64_t *grid_size = ret;
 464          grid_size[0] = 65535;
 465          grid_size[1] = 65535;
 466          grid_size[2] = 65535;
 467       }
 468       return 3 * sizeof(uint64_t) ;
 469    case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
 470       if (ret) {
 471          uint64_t *block_size = ret;
 472          block_size[0] = 1024;
 473          block_size[1] = 1024;
 474          block_size[2] = 1024;
 475       }
 476       return 3 * sizeof(uint64_t);
 477    case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
 478       if (ret) {
 479          uint64_t *max_threads_per_block = ret;
 480          *max_threads_per_block = 1024;
 481       }
 482       return sizeof(uint64_t);
 483    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
 484       if (ret) {
 485          uint64_t *max_local_size = ret;
 486          *max_local_size = 32768;
 487       }
 488       return sizeof(uint64_t);
 489    case PIPE_COMPUTE_CAP_GRID_DIMENSION:
 490    case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE:
 491    case PIPE_COMPUTE_CAP_MAX_PRIVATE_SIZE:
 492    case PIPE_COMPUTE_CAP_MAX_INPUT_SIZE:
 493    case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE:
 494    case PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY:
 495    case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
 496    case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
 497    case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
 498       break;
 499    }
 500    return 0;
 501 }
 502
 503 /**
 504  * Create a new pipe_screen object
 505  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 506  */
 507 struct pipe_screen *
 508 softpipe_create_screen(struct sw_winsys *winsys)
 509 {
 510    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 511
 512    if (!screen)
 513       return NULL;
 514
 515    screen->winsys = winsys;
 516
 517    screen->base.destroy = softpipe_destroy_screen;
 518
 519    screen->base.get_name = softpipe_get_name;
 520    screen->base.get_vendor = softpipe_get_vendor;
 521    screen->base.get_device_vendor = softpipe_get_vendor; // TODO should be the CPU vendor
 522    screen->base.get_param = softpipe_get_param;
 523    screen->base.get_shader_param = softpipe_get_shader_param;
 524    screen->base.get_paramf = softpipe_get_paramf;
 525    screen->base.get_timestamp = softpipe_get_timestamp;
 526    screen->base.is_format_supported = softpipe_is_format_supported;
 527    screen->base.context_create = softpipe_create_context;
 528    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 529    screen->base.get_compute_param = softpipe_get_compute_param;
 530    screen->use_llvm = debug_get_option_use_llvm();
 531
 532    util_format_s3tc_init();
 533
 534    softpipe_init_screen_texture_funcs(&screen->base);
 535    softpipe_init_screen_fence_funcs(&screen->base);
 536
 537    return &screen->base;
 538 }