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/format/u_format.h"
  31 #include "util/format/u_format_s3tc.h"
  32 #include "util/u_screen.h"
  33 #include "util/u_video.h"
  34 #include "util/os_misc.h"
  35 #include "util/os_time.h"
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_screen.h"
  38 #include "draw/draw_context.h"
  39
  40 #include "frontend/sw_winsys.h"
  41 #include "tgsi/tgsi_exec.h"
  42
  43 #include "sp_texture.h"
  44 #include "sp_screen.h"
  45 #include "sp_context.h"
  46 #include "sp_fence.h"
  47 #include "sp_public.h"
  48
  49 DEBUG_GET_ONCE_BOOL_OPTION(use_llvm, "SOFTPIPE_USE_LLVM", FALSE)
  50
  51 static const char *
  52 softpipe_get_vendor(struct pipe_screen *screen)
  53 {
  54    return "Mesa/X.org";
  55 }
  56
  57
  58 static const char *
  59 softpipe_get_name(struct pipe_screen *screen)
  60 {
  61    return "softpipe";
  62 }
  63
  64
  65 static int
  66 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  67 {
  68    struct softpipe_screen *sp_screen = softpipe_screen(screen);
  69    switch (param) {
  70    case PIPE_CAP_NPOT_TEXTURES:
  71    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
  72    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
  73       return 1;
  74    case PIPE_CAP_FRAGMENT_SHADER_TEXTURE_LOD:
  75    case PIPE_CAP_FRAGMENT_SHADER_DERIVATIVES:
  76    case PIPE_CAP_VERTEX_SHADER_SATURATE:
  77       return 1;
  78    case PIPE_CAP_ANISOTROPIC_FILTER:
  79       return 1;
  80    case PIPE_CAP_POINT_SPRITE:
  81       return 1;
  82    case PIPE_CAP_MAX_RENDER_TARGETS:
  83       return PIPE_MAX_COLOR_BUFS;
  84    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  85       return 1;
  86    case PIPE_CAP_OCCLUSION_QUERY:
  87       return 1;
  88    case PIPE_CAP_QUERY_TIME_ELAPSED:
  89       return 1;
  90    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
  91       return 1;
  92    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  93    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
  94       return 1;
  95    case PIPE_CAP_TEXTURE_SWIZZLE:
  96       return 1;
  97    case PIPE_CAP_MAX_TEXTURE_2D_SIZE:
  98       return 1 << (SP_MAX_TEXTURE_2D_LEVELS - 1);
  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       if (sp_screen->use_llvm)
 126          return 1;
 127       else
 128          return PIPE_MAX_VERTEX_STREAMS;
 129    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 130       return 2048;
 131    case PIPE_CAP_PRIMITIVE_RESTART:
 132    case PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX:
 133       return 1;
 134    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 135       return 1;
 136    case PIPE_CAP_TGSI_ATOMFADD:
 137    case PIPE_CAP_TGSI_INSTANCEID:
 138    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 139    case PIPE_CAP_START_INSTANCE:
 140       return 1;
 141    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 142    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 143       return 1;
 144    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 145       return 256; /* for GL3 */
 146    case PIPE_CAP_MIN_TEXEL_OFFSET:
 147       return -8;
 148    case PIPE_CAP_MAX_TEXEL_OFFSET:
 149       return 7;
 150    case PIPE_CAP_CONDITIONAL_RENDER:
 151    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 152    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: /* draw module */
 153    case PIPE_CAP_VERTEX_COLOR_CLAMPED: /* draw module */
 154       return 1;
 155    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 156       return 1;
 157    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 158       return 400;
 159    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 160       return 140;
 161    case PIPE_CAP_COMPUTE:
 162       return 1;
 163    case PIPE_CAP_USER_VERTEX_BUFFERS:
 164    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 165    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 166    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 167    case PIPE_CAP_DOUBLES:
 168    case PIPE_CAP_INT64:
 169    case PIPE_CAP_INT64_DIVMOD:
 170    case PIPE_CAP_TGSI_DIV:
 171       return 1;
 172    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 173       return 16;
 174    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 175       return 64;
 176    case PIPE_CAP_QUERY_TIMESTAMP:
 177    case PIPE_CAP_CUBE_MAP_ARRAY:
 178       return 1;
 179    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 180       return 1;
 181    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 182       return 65536;
 183    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 184       return 16;
 185    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 186       return 0;
 187    case PIPE_CAP_MAX_VIEWPORTS:
 188       return PIPE_MAX_VIEWPORTS;
 189    case PIPE_CAP_ENDIANNESS:
 190       return PIPE_ENDIAN_NATIVE;
 191    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 192       return 4;
 193    case PIPE_CAP_TEXTURE_GATHER_SM5:
 194    case PIPE_CAP_TEXTURE_QUERY_LOD:
 195       return 1;
 196    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 197       return 1;
 198    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 199       return 1;
 200    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 201       return 1;
 202    case PIPE_CAP_FAKE_SW_MSAA:
 203       return 1;
 204    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 205       return -32;
 206    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 207       return 31;
 208    case PIPE_CAP_DRAW_INDIRECT:
 209       return 1;
 210    case PIPE_CAP_QUERY_SO_OVERFLOW:
 211       return 1;
 212
 213    case PIPE_CAP_VENDOR_ID:
 214       return 0xFFFFFFFF;
 215    case PIPE_CAP_DEVICE_ID:
 216       return 0xFFFFFFFF;
 217    case PIPE_CAP_ACCELERATED:
 218       return 0;
 219    case PIPE_CAP_VIDEO_MEMORY: {
 220       /* XXX: Do we want to return the full amount fo system memory ? */
 221       uint64_t system_memory;
 222
 223       if (!os_get_total_physical_memory(&system_memory))
 224          return 0;
 225
 226       if (sizeof(void *) == 4)
 227          /* Cap to 2 GB on 32 bits system. We do this because softpipe does
 228           * eat application memory, which is quite limited on 32 bits. App
 229           * shouldn't expect too much available memory. */
 230          system_memory = MIN2(system_memory, 2048 << 20);
 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    case PIPE_CAP_CULL_DISTANCE:
 244    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 245    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 246       return 1;
 247    case PIPE_CAP_CLEAR_TEXTURE:
 248       return 1;
 249    case PIPE_CAP_MAX_VARYINGS:
 250       return TGSI_EXEC_MAX_INPUT_ATTRIBS;
 251    case PIPE_CAP_PCI_GROUP:
 252    case PIPE_CAP_PCI_BUS:
 253    case PIPE_CAP_PCI_DEVICE:
 254    case PIPE_CAP_PCI_FUNCTION:
 255    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 256       return 0;
 257    case PIPE_CAP_MAX_GS_INVOCATIONS:
 258       return 32;
 259    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 260       return 1 << 27;
 261    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 262       return 4;
 263    default:
 264       return u_pipe_screen_get_param_defaults(screen, param);
 265    }
 266 }
 267
 268 static int
 269 softpipe_get_shader_param(struct pipe_screen *screen,
 270                           enum pipe_shader_type shader,
 271                           enum pipe_shader_cap param)
 272 {
 273    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 274    switch(shader)
 275    {
 276    case PIPE_SHADER_FRAGMENT:
 277       return tgsi_exec_get_shader_param(param);
 278    case PIPE_SHADER_COMPUTE:
 279       return tgsi_exec_get_shader_param(param);
 280    case PIPE_SHADER_VERTEX:
 281    case PIPE_SHADER_GEOMETRY:
 282       if (sp_screen->use_llvm)
 283          return draw_get_shader_param(shader, param);
 284       else
 285          return draw_get_shader_param_no_llvm(shader, param);
 286    default:
 287       return 0;
 288    }
 289 }
 290
 291 static float
 292 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 293 {
 294    switch (param) {
 295    case PIPE_CAPF_MAX_LINE_WIDTH:
 296       /* fall-through */
 297    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 298       return 255.0; /* arbitrary */
 299    case PIPE_CAPF_MAX_POINT_WIDTH:
 300       /* fall-through */
 301    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 302       return 255.0; /* arbitrary */
 303    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 304       return 16.0;
 305    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 306       return 16.0; /* arbitrary */
 307    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 308       return 0.0;
 309    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 310       return 0.0;
 311    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 312       return 0.0;
 313    }
 314    /* should only get here on unhandled cases */
 315    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 316    return 0.0;
 317 }
 318
 319 /**
 320  * Query format support for creating a texture, drawing surface, etc.
 321  * \param format  the format to test
 322  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 323  */
 324 static bool
 325 softpipe_is_format_supported( struct pipe_screen *screen,
 326                               enum pipe_format format,
 327                               enum pipe_texture_target target,
 328                               unsigned sample_count,
 329                               unsigned storage_sample_count,
 330                               unsigned bind)
 331 {
 332    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 333    const struct util_format_description *format_desc;
 334
 335    assert(target == PIPE_BUFFER ||
 336           target == PIPE_TEXTURE_1D ||
 337           target == PIPE_TEXTURE_1D_ARRAY ||
 338           target == PIPE_TEXTURE_2D ||
 339           target == PIPE_TEXTURE_2D_ARRAY ||
 340           target == PIPE_TEXTURE_RECT ||
 341           target == PIPE_TEXTURE_3D ||
 342           target == PIPE_TEXTURE_CUBE ||
 343           target == PIPE_TEXTURE_CUBE_ARRAY);
 344
 345    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 346       return false;
 347
 348    format_desc = util_format_description(format);
 349    if (!format_desc)
 350       return false;
 351
 352    if (sample_count > 1)
 353       return false;
 354
 355    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 356                PIPE_BIND_SCANOUT |
 357                PIPE_BIND_SHARED)) {
 358       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 359          return false;
 360    }
 361
 362    if (bind & PIPE_BIND_RENDER_TARGET) {
 363       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 364          return false;
 365
 366       /*
 367        * Although possible, it is unnatural to render into compressed or YUV
 368        * surfaces. So disable these here to avoid going into weird paths
 369        * inside gallium frontends.
 370        */
 371       if (format_desc->block.width != 1 ||
 372           format_desc->block.height != 1)
 373          return false;
 374    }
 375
 376    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 377       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 378          return false;
 379    }
 380
 381    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC ||
 382        format_desc->layout == UTIL_FORMAT_LAYOUT_ATC) {
 383       /* Software decoding is not hooked up. */
 384       return false;
 385    }
 386
 387    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 388        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0) &&
 389        target != PIPE_BUFFER) {
 390       const struct util_format_description *desc =
 391          util_format_description(format);
 392       if (desc->nr_channels == 3 && desc->is_array) {
 393          /* Don't support any 3-component formats for rendering/texturing
 394           * since we don't support the corresponding 8-bit 3 channel UNORM
 395           * formats.  This allows us to support GL_ARB_copy_image between
 396           * GL_RGB8 and GL_RGB8UI, for example.  Otherwise, we may be asked to
 397           * do a resource copy between PIPE_FORMAT_R8G8B8_UINT and
 398           * PIPE_FORMAT_R8G8B8X8_UNORM, for example, which will not work
 399           * (different bpp).
 400           */
 401          return false;
 402       }
 403    }
 404
 405    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 406        format != PIPE_FORMAT_ETC1_RGB8)
 407       return false;
 408
 409    /*
 410     * All other operations (sampling, transfer, etc).
 411     */
 412
 413    /*
 414     * Everything else should be supported by u_format.
 415     */
 416    return true;
 417 }
 418
 419
 420 static void
 421 softpipe_destroy_screen( struct pipe_screen *screen )
 422 {
 423    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 424    struct sw_winsys *winsys = sp_screen->winsys;
 425
 426    if(winsys->destroy)
 427       winsys->destroy(winsys);
 428
 429    FREE(screen);
 430 }
 431
 432
 433 /* This is often overriden by the co-state tracker.
 434  */
 435 static void
 436 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 437                            struct pipe_resource *resource,
 438                            unsigned level, unsigned layer,
 439                            void *context_private,
 440                            struct pipe_box *sub_box)
 441 {
 442    struct softpipe_screen *screen = softpipe_screen(_screen);
 443    struct sw_winsys *winsys = screen->winsys;
 444    struct softpipe_resource *texture = softpipe_resource(resource);
 445
 446    assert(texture->dt);
 447    if (texture->dt)
 448       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 449 }
 450
 451 static uint64_t
 452 softpipe_get_timestamp(struct pipe_screen *_screen)
 453 {
 454    return os_time_get_nano();
 455 }
 456
 457 static int
 458 softpipe_get_compute_param(struct pipe_screen *_screen,
 459                            enum pipe_shader_ir ir_type,
 460                            enum pipe_compute_cap param,
 461                            void *ret)
 462 {
 463    switch (param) {
 464    case PIPE_COMPUTE_CAP_IR_TARGET:
 465       return 0;
 466    case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
 467       if (ret) {
 468          uint64_t *grid_size = ret;
 469          grid_size[0] = 65535;
 470          grid_size[1] = 65535;
 471          grid_size[2] = 65535;
 472       }
 473       return 3 * sizeof(uint64_t) ;
 474    case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
 475       if (ret) {
 476          uint64_t *block_size = ret;
 477          block_size[0] = 1024;
 478          block_size[1] = 1024;
 479          block_size[2] = 1024;
 480       }
 481       return 3 * sizeof(uint64_t);
 482    case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
 483       if (ret) {
 484          uint64_t *max_threads_per_block = ret;
 485          *max_threads_per_block = 1024;
 486       }
 487       return sizeof(uint64_t);
 488    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
 489       if (ret) {
 490          uint64_t *max_local_size = ret;
 491          *max_local_size = 32768;
 492       }
 493       return sizeof(uint64_t);
 494    case PIPE_COMPUTE_CAP_GRID_DIMENSION:
 495    case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE:
 496    case PIPE_COMPUTE_CAP_MAX_PRIVATE_SIZE:
 497    case PIPE_COMPUTE_CAP_MAX_INPUT_SIZE:
 498    case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE:
 499    case PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY:
 500    case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
 501    case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
 502    case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
 503    case PIPE_COMPUTE_CAP_ADDRESS_BITS:
 504    case PIPE_COMPUTE_CAP_MAX_VARIABLE_THREADS_PER_BLOCK:
 505       break;
 506    }
 507    return 0;
 508 }
 509
 510 /**
 511  * Create a new pipe_screen object
 512  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 513  */
 514 struct pipe_screen *
 515 softpipe_create_screen(struct sw_winsys *winsys)
 516 {
 517    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 518
 519    if (!screen)
 520       return NULL;
 521
 522    screen->winsys = winsys;
 523
 524    screen->base.destroy = softpipe_destroy_screen;
 525
 526    screen->base.get_name = softpipe_get_name;
 527    screen->base.get_vendor = softpipe_get_vendor;
 528    screen->base.get_device_vendor = softpipe_get_vendor; // TODO should be the CPU vendor
 529    screen->base.get_param = softpipe_get_param;
 530    screen->base.get_shader_param = softpipe_get_shader_param;
 531    screen->base.get_paramf = softpipe_get_paramf;
 532    screen->base.get_timestamp = softpipe_get_timestamp;
 533    screen->base.is_format_supported = softpipe_is_format_supported;
 534    screen->base.context_create = softpipe_create_context;
 535    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 536    screen->base.get_compute_param = softpipe_get_compute_param;
 537    screen->use_llvm = debug_get_option_use_llvm();
 538
 539    softpipe_init_screen_texture_funcs(&screen->base);
 540    softpipe_init_screen_fence_funcs(&screen->base);
 541
 542    return &screen->base;
 543 }