src/gallium/drivers/r300/r300_screen.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 #include "util/u_format.h"
  25 #include "util/u_format_s3tc.h"
  26 #include "util/u_memory.h"
  27 #include "os/os_time.h"
  28 #include "vl/vl_decoder.h"
  29 #include "vl/vl_video_buffer.h"
  30
  31 #include "r300_context.h"
  32 #include "r300_texture.h"
  33 #include "r300_screen_buffer.h"
  34 #include "r300_state_inlines.h"
  35 #include "r300_public.h"
  36
  37 #include "draw/draw_context.h"
  38
  39 /* Return the identifier behind whom the brave coders responsible for this
  40  * amalgamation of code, sweat, and duct tape, routinely obscure their names.
  41  *
  42  * ...I should have just put "Corbin Simpson", but I'm not that cool.
  43  *
  44  * (Or egotistical. Yet.) */
  45 static const char* r300_get_vendor(struct pipe_screen* pscreen)
  46 {
  47     return "X.Org R300 Project";
  48 }
  49
  50 static const char* chip_families[] = {
  51     "ATI R300",
  52     "ATI R350",
  53     "ATI RV350",
  54     "ATI RV370",
  55     "ATI RV380",
  56     "ATI RS400",
  57     "ATI RC410",
  58     "ATI RS480",
  59     "ATI R420",
  60     "ATI R423",
  61     "ATI R430",
  62     "ATI R480",
  63     "ATI R481",
  64     "ATI RV410",
  65     "ATI RS600",
  66     "ATI RS690",
  67     "ATI RS740",
  68     "ATI RV515",
  69     "ATI R520",
  70     "ATI RV530",
  71     "ATI R580",
  72     "ATI RV560",
  73     "ATI RV570"
  74 };
  75
  76 static const char* r300_get_name(struct pipe_screen* pscreen)
  77 {
  78     struct r300_screen* r300screen = r300_screen(pscreen);
  79
  80     return chip_families[r300screen->caps.family];
  81 }
  82
  83 static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
  84 {
  85     struct r300_screen* r300screen = r300_screen(pscreen);
  86     boolean is_r500 = r300screen->caps.is_r500;
  87
  88     switch (param) {
  89         /* Supported features (boolean caps). */
  90         case PIPE_CAP_NPOT_TEXTURES:
  91         case PIPE_CAP_TWO_SIDED_STENCIL:
  92         case PIPE_CAP_ANISOTROPIC_FILTER:
  93         case PIPE_CAP_POINT_SPRITE:
  94         case PIPE_CAP_OCCLUSION_QUERY:
  95         case PIPE_CAP_TEXTURE_SHADOW_MAP:
  96         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  97         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  98         case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
  99         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 100         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 101         case PIPE_CAP_CONDITIONAL_RENDER:
 102         case PIPE_CAP_TEXTURE_BARRIER:
 103         case PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS:
 104         case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 105             return 1;
 106
 107         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 108         case PIPE_CAP_TEXTURE_SWIZZLE:
 109             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 110
 111         /* Supported on r500 only. */
 112         case PIPE_CAP_FRAGMENT_COLOR_CLAMP_CONTROL:
 113         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 114         case PIPE_CAP_SM3:
 115             return is_r500 ? 1 : 0;
 116
 117         /* Unsupported features. */
 118         case PIPE_CAP_TIMER_QUERY:
 119         case PIPE_CAP_DUAL_SOURCE_BLEND:
 120         case PIPE_CAP_INDEP_BLEND_ENABLE:
 121         case PIPE_CAP_INDEP_BLEND_FUNC:
 122         case PIPE_CAP_DEPTH_CLIP_DISABLE:
 123         case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 124         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 125         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 126         case PIPE_CAP_TGSI_INSTANCEID:
 127         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 128         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 129         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 130         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 131         case PIPE_CAP_SCALED_RESOLVE:
 132         case PIPE_CAP_MIN_TEXEL_OFFSET:
 133         case PIPE_CAP_MAX_TEXEL_OFFSET:
 134         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 135         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 136         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 137         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 138             return 0;
 139
 140         /* SWTCL-only features. */
 141         case PIPE_CAP_PRIMITIVE_RESTART:
 142             return !r300screen->caps.has_tcl;
 143
 144         /* Texturing. */
 145         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
 146             return r300screen->caps.num_tex_units;
 147         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 148         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 149         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 150             /* 13 == 4096, 12 == 2048 */
 151             return is_r500 ? 13 : 12;
 152
 153         /* Render targets. */
 154         case PIPE_CAP_MAX_RENDER_TARGETS:
 155             return 4;
 156     }
 157     return 0;
 158 }
 159
 160 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 161 {
 162    struct r300_screen* r300screen = r300_screen(pscreen);
 163    boolean is_r400 = r300screen->caps.is_r400;
 164    boolean is_r500 = r300screen->caps.is_r500;
 165
 166    switch (shader) {
 167     case PIPE_SHADER_FRAGMENT:
 168         switch (param)
 169         {
 170         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 171             return is_r500 || is_r400 ? 512 : 96;
 172         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 173             return is_r500 || is_r400 ? 512 : 64;
 174         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 175             return is_r500 || is_r400 ? 512 : 32;
 176         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 177             return is_r500 ? 511 : 4;
 178         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 179             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 180             /* Fragment shader limits. */
 181         case PIPE_SHADER_CAP_MAX_INPUTS:
 182             /* 2 colors + 8 texcoords are always supported
 183              * (minus fog and wpos).
 184              *
 185              * R500 has the ability to turn 3rd and 4th color into
 186              * additional texcoords but there is no two-sided color
 187              * selection then. However the facing bit can be used instead. */
 188             return 10;
 189         case PIPE_SHADER_CAP_MAX_CONSTS:
 190             return is_r500 ? 256 : 32;
 191         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 192             return 1;
 193         case PIPE_SHADER_CAP_MAX_TEMPS:
 194             return is_r500 ? 128 : is_r400 ? 64 : 32;
 195         case PIPE_SHADER_CAP_MAX_PREDS:
 196             return is_r500 ? 1 : 0;
 197         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 198            return r300screen->caps.num_tex_units;
 199         case PIPE_SHADER_CAP_MAX_ADDRS:
 200         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 201         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 202         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 203         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 204         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 205         case PIPE_SHADER_CAP_SUBROUTINES:
 206         case PIPE_SHADER_CAP_INTEGERS:
 207         case PIPE_SHADER_CAP_OUTPUT_READ:
 208             return 0;
 209         }
 210         break;
 211     case PIPE_SHADER_VERTEX:
 212         switch (param)
 213         {
 214         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 215             return 0;
 216         default:;
 217         }
 218
 219         if (!r300screen->caps.has_tcl) {
 220             return draw_get_shader_param(shader, param);
 221         }
 222
 223         switch (param)
 224         {
 225         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 226         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 227             return is_r500 ? 1024 : 256;
 228         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 229             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 230         case PIPE_SHADER_CAP_MAX_INPUTS:
 231             return 16;
 232         case PIPE_SHADER_CAP_MAX_CONSTS:
 233             return 256;
 234         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 235             return 1;
 236         case PIPE_SHADER_CAP_MAX_TEMPS:
 237             return 32;
 238         case PIPE_SHADER_CAP_MAX_ADDRS:
 239             return 1; /* XXX guessed */
 240         case PIPE_SHADER_CAP_MAX_PREDS:
 241             return is_r500 ? 4 : 0; /* XXX guessed. */
 242         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 243             return 1;
 244         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 245         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 246         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 247         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 248         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 249         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 250         case PIPE_SHADER_CAP_SUBROUTINES:
 251         case PIPE_SHADER_CAP_INTEGERS:
 252         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 253         case PIPE_SHADER_CAP_OUTPUT_READ:
 254             return 0;
 255         }
 256         break;
 257     }
 258     return 0;
 259 }
 260
 261 static float r300_get_paramf(struct pipe_screen* pscreen,
 262                              enum pipe_capf param)
 263 {
 264     struct r300_screen* r300screen = r300_screen(pscreen);
 265
 266     switch (param) {
 267         case PIPE_CAPF_MAX_LINE_WIDTH:
 268         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 269         case PIPE_CAPF_MAX_POINT_WIDTH:
 270         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 271             /* The maximum dimensions of the colorbuffer are our practical
 272              * rendering limits. 2048 pixels should be enough for anybody. */
 273             if (r300screen->caps.is_r500) {
 274                 return 4096.0f;
 275             } else if (r300screen->caps.is_r400) {
 276                 return 4021.0f;
 277             } else {
 278                 return 2560.0f;
 279             }
 280         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 281             return 16.0f;
 282         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 283             return 16.0f;
 284         case PIPE_CAPF_GUARD_BAND_LEFT:
 285         case PIPE_CAPF_GUARD_BAND_TOP:
 286         case PIPE_CAPF_GUARD_BAND_RIGHT:
 287         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 288             /* XXX I don't know what these should be but the least we can do is
 289              * silence the potential error message */
 290             return 0.0f;
 291         default:
 292             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 293                          param);
 294             return 0.0f;
 295     }
 296 }
 297
 298 static int r300_get_video_param(struct pipe_screen *screen,
 299                                 enum pipe_video_profile profile,
 300                                 enum pipe_video_cap param)
 301 {
 302    switch (param) {
 303       case PIPE_VIDEO_CAP_SUPPORTED:
 304          return vl_profile_supported(screen, profile);
 305       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 306          return 0;
 307       case PIPE_VIDEO_CAP_MAX_WIDTH:
 308       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 309          return vl_video_buffer_max_size(screen);
 310       default:
 311          return 0;
 312    }
 313 }
 314
 315 static boolean r300_is_format_supported(struct pipe_screen* screen,
 316                                         enum pipe_format format,
 317                                         enum pipe_texture_target target,
 318                                         unsigned sample_count,
 319                                         unsigned usage)
 320 {
 321     uint32_t retval = 0;
 322     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 323     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 324     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 325     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 326                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 327                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 328                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 329     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 330                        format == PIPE_FORMAT_RGTC1_SNORM ||
 331                        format == PIPE_FORMAT_LATC1_UNORM ||
 332                        format == PIPE_FORMAT_LATC1_SNORM;
 333     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 334                        format == PIPE_FORMAT_RGTC2_SNORM ||
 335                        format == PIPE_FORMAT_LATC2_UNORM ||
 336                        format == PIPE_FORMAT_LATC2_SNORM;
 337     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 338                             format == PIPE_FORMAT_R16G16_FLOAT ||
 339                             format == PIPE_FORMAT_A16_FLOAT ||
 340                             format == PIPE_FORMAT_L16_FLOAT ||
 341                             format == PIPE_FORMAT_L16A16_FLOAT ||
 342                             format == PIPE_FORMAT_I16_FLOAT;
 343     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 344                             format == PIPE_FORMAT_R16G16_FLOAT ||
 345                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 346                             format == PIPE_FORMAT_R16G16B16A16_FLOAT;
 347     boolean is_fixed = format == PIPE_FORMAT_R32_FIXED ||
 348                        format == PIPE_FORMAT_R32G32_FIXED ||
 349                        format == PIPE_FORMAT_R32G32B32_FIXED ||
 350                        format == PIPE_FORMAT_R32G32B32A32_FIXED;
 351
 352     if (!util_format_is_supported(format, usage))
 353        return FALSE;
 354
 355     /* Check multisampling support. */
 356     switch (sample_count) {
 357         case 0:
 358         case 1:
 359             break;
 360         case 2:
 361         case 3:
 362         case 4:
 363         case 6:
 364             return FALSE;
 365 #if 0
 366             if (usage != PIPE_BIND_RENDER_TARGET ||
 367                 !util_format_is_rgba8_variant(
 368                     util_format_description(format))) {
 369                 return FALSE;
 370             }
 371 #endif
 372             break;
 373         default:
 374             return FALSE;
 375     }
 376
 377     /* Check sampler format support. */
 378     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 379         /* ATI1N is r5xx-only. */
 380         (is_r500 || !is_ati1n) &&
 381         /* ATI2N is supported on r4xx-r5xx. */
 382         (is_r400 || is_r500 || !is_ati2n) &&
 383         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 384         (drm_2_8_0 || !is_x16f_xy16f) &&
 385         r300_is_sampler_format_supported(format)) {
 386         retval |= PIPE_BIND_SAMPLER_VIEW;
 387     }
 388
 389     /* Check colorbuffer format support. */
 390     if ((usage & (PIPE_BIND_RENDER_TARGET |
 391                   PIPE_BIND_DISPLAY_TARGET |
 392                   PIPE_BIND_SCANOUT |
 393                   PIPE_BIND_SHARED)) &&
 394         /* 2101010 cannot be rendered to on non-r5xx. */
 395         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 396         r300_is_colorbuffer_format_supported(format)) {
 397         retval |= usage &
 398             (PIPE_BIND_RENDER_TARGET |
 399              PIPE_BIND_DISPLAY_TARGET |
 400              PIPE_BIND_SCANOUT |
 401              PIPE_BIND_SHARED);
 402     }
 403
 404     /* Check depth-stencil format support. */
 405     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 406         r300_is_zs_format_supported(format)) {
 407         retval |= PIPE_BIND_DEPTH_STENCIL;
 408     }
 409
 410     /* Check vertex buffer format support. */
 411     if (usage & PIPE_BIND_VERTEX_BUFFER &&
 412         /* Half float is supported on >= R400. */
 413         (is_r400 || is_r500 || !is_half_float) &&
 414         /* We have a fallback for FIXED. */
 415         (is_fixed || r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT)) {
 416         retval |= PIPE_BIND_VERTEX_BUFFER;
 417     }
 418
 419     /* Transfers are always supported. */
 420     if (usage & PIPE_BIND_TRANSFER_READ)
 421         retval |= PIPE_BIND_TRANSFER_READ;
 422     if (usage & PIPE_BIND_TRANSFER_WRITE)
 423         retval |= PIPE_BIND_TRANSFER_WRITE;
 424
 425     return retval == usage;
 426 }
 427
 428 static void r300_destroy_screen(struct pipe_screen* pscreen)
 429 {
 430     struct r300_screen* r300screen = r300_screen(pscreen);
 431     struct radeon_winsys *rws = radeon_winsys(pscreen);
 432
 433     util_slab_destroy(&r300screen->pool_buffers);
 434     pipe_mutex_destroy(r300screen->num_contexts_mutex);
 435
 436     if (rws)
 437       rws->destroy(rws);
 438
 439     FREE(r300screen);
 440 }
 441
 442 static void r300_fence_reference(struct pipe_screen *screen,
 443                                  struct pipe_fence_handle **ptr,
 444                                  struct pipe_fence_handle *fence)
 445 {
 446     pb_reference((struct pb_buffer**)ptr,
 447                              (struct pb_buffer*)fence);
 448 }
 449
 450 static boolean r300_fence_signalled(struct pipe_screen *screen,
 451                                     struct pipe_fence_handle *fence)
 452 {
 453     struct radeon_winsys *rws = r300_screen(screen)->rws;
 454     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 455
 456     return !rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE);
 457 }
 458
 459 static boolean r300_fence_finish(struct pipe_screen *screen,
 460                                  struct pipe_fence_handle *fence,
 461                                  uint64_t timeout)
 462 {
 463     struct radeon_winsys *rws = r300_screen(screen)->rws;
 464     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 465
 466     if (timeout != PIPE_TIMEOUT_INFINITE) {
 467         int64_t start_time = os_time_get();
 468
 469         /* Convert to microseconds. */
 470         timeout /= 1000;
 471
 472         /* Wait in a loop. */
 473         while (rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE)) {
 474             if (os_time_get() - start_time >= timeout) {
 475                 return FALSE;
 476             }
 477             os_time_sleep(10);
 478         }
 479         return TRUE;
 480     }
 481
 482     rws->buffer_wait(rfence, RADEON_USAGE_READWRITE);
 483     return TRUE;
 484 }
 485
 486 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 487 {
 488     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 489
 490     if (!r300screen) {
 491         FREE(r300screen);
 492         return NULL;
 493     }
 494
 495     rws->query_info(rws, &r300screen->info);
 496
 497     r300_init_debug(r300screen);
 498     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 499
 500     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 501         r300screen->caps.zmask_ram = 0;
 502     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 503         r300screen->caps.hiz_ram = 0;
 504
 505     if (r300screen->info.drm_minor < 8)
 506         r300screen->caps.has_us_format = FALSE;
 507
 508     pipe_mutex_init(r300screen->num_contexts_mutex);
 509
 510     util_slab_create(&r300screen->pool_buffers,
 511                      sizeof(struct r300_resource), 64,
 512                      UTIL_SLAB_SINGLETHREADED);
 513
 514     r300screen->rws = rws;
 515     r300screen->screen.winsys = (struct pipe_winsys*)rws;
 516     r300screen->screen.destroy = r300_destroy_screen;
 517     r300screen->screen.get_name = r300_get_name;
 518     r300screen->screen.get_vendor = r300_get_vendor;
 519     r300screen->screen.get_param = r300_get_param;
 520     r300screen->screen.get_shader_param = r300_get_shader_param;
 521     r300screen->screen.get_paramf = r300_get_paramf;
 522     r300screen->screen.get_video_param = r300_get_video_param;
 523     r300screen->screen.is_format_supported = r300_is_format_supported;
 524     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 525     r300screen->screen.context_create = r300_create_context;
 526     r300screen->screen.fence_reference = r300_fence_reference;
 527     r300screen->screen.fence_signalled = r300_fence_signalled;
 528     r300screen->screen.fence_finish = r300_fence_finish;
 529
 530     r300_init_screen_resource_functions(r300screen);
 531
 532     util_format_s3tc_init();
 533
 534     return &r300screen->screen;
 535 }