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             return 1;
 104
 105         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 106         case PIPE_CAP_TEXTURE_SWIZZLE:
 107             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 108
 109         /* Supported on r500 only. */
 110         case PIPE_CAP_FRAGMENT_COLOR_CLAMP_CONTROL:
 111         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 112         case PIPE_CAP_SM3:
 113             return is_r500 ? 1 : 0;
 114
 115         /* Unsupported features. */
 116         case PIPE_CAP_TIMER_QUERY:
 117         case PIPE_CAP_DUAL_SOURCE_BLEND:
 118         case PIPE_CAP_INDEP_BLEND_ENABLE:
 119         case PIPE_CAP_INDEP_BLEND_FUNC:
 120         case PIPE_CAP_DEPTH_CLAMP:
 121         case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 122         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 123         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 124         case PIPE_CAP_TGSI_INSTANCEID:
 125         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 126         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 127         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 128         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 129         case PIPE_CAP_SCALED_RESOLVE:
 130         case PIPE_CAP_MIN_TEXEL_OFFSET:
 131         case PIPE_CAP_MAX_TEXEL_OFFSET:
 132         case PIPE_CAP_STREAM_OUTPUT:
 133             return 0;
 134
 135         /* SWTCL-only features. */
 136         case PIPE_CAP_PRIMITIVE_RESTART:
 137             return !r300screen->caps.has_tcl;
 138
 139         /* Texturing. */
 140         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
 141             return r300screen->caps.num_tex_units;
 142         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 143         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 144         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 145             /* 13 == 4096, 12 == 2048 */
 146             return is_r500 ? 13 : 12;
 147
 148         /* Render targets. */
 149         case PIPE_CAP_MAX_RENDER_TARGETS:
 150             return 4;
 151     }
 152     return 0;
 153 }
 154
 155 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 156 {
 157    struct r300_screen* r300screen = r300_screen(pscreen);
 158    boolean is_r400 = r300screen->caps.is_r400;
 159    boolean is_r500 = r300screen->caps.is_r500;
 160
 161    switch (shader) {
 162     case PIPE_SHADER_FRAGMENT:
 163         switch (param)
 164         {
 165         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 166             return is_r500 || is_r400 ? 512 : 96;
 167         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 168             return is_r500 || is_r400 ? 512 : 64;
 169         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 170             return is_r500 || is_r400 ? 512 : 32;
 171         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 172             return is_r500 ? 511 : 4;
 173         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 174             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 175             /* Fragment shader limits. */
 176         case PIPE_SHADER_CAP_MAX_INPUTS:
 177             /* 2 colors + 8 texcoords are always supported
 178              * (minus fog and wpos).
 179              *
 180              * R500 has the ability to turn 3rd and 4th color into
 181              * additional texcoords but there is no two-sided color
 182              * selection then. However the facing bit can be used instead. */
 183             return 10;
 184         case PIPE_SHADER_CAP_MAX_CONSTS:
 185             return is_r500 ? 256 : 32;
 186         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 187             return 1;
 188         case PIPE_SHADER_CAP_MAX_TEMPS:
 189             return is_r500 ? 128 : is_r400 ? 64 : 32;
 190         case PIPE_SHADER_CAP_MAX_PREDS:
 191             return is_r500 ? 1 : 0;
 192         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 193            return r300screen->caps.num_tex_units;
 194         case PIPE_SHADER_CAP_MAX_ADDRS:
 195         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 196         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 197         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 198         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 199         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 200         case PIPE_SHADER_CAP_SUBROUTINES:
 201         case PIPE_SHADER_CAP_INTEGERS:
 202         case PIPE_SHADER_CAP_OUTPUT_READ:
 203             return 0;
 204         }
 205         break;
 206     case PIPE_SHADER_VERTEX:
 207         switch (param)
 208         {
 209         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 210             return 0;
 211         default:;
 212         }
 213
 214         if (!r300screen->caps.has_tcl) {
 215             return draw_get_shader_param(shader, param);
 216         }
 217
 218         switch (param)
 219         {
 220         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 221         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 222             return is_r500 ? 1024 : 256;
 223         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 224             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 225         case PIPE_SHADER_CAP_MAX_INPUTS:
 226             return 16;
 227         case PIPE_SHADER_CAP_MAX_CONSTS:
 228             return 256;
 229         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 230             return 1;
 231         case PIPE_SHADER_CAP_MAX_TEMPS:
 232             return 32;
 233         case PIPE_SHADER_CAP_MAX_ADDRS:
 234             return 1; /* XXX guessed */
 235         case PIPE_SHADER_CAP_MAX_PREDS:
 236             return is_r500 ? 4 : 0; /* XXX guessed. */
 237         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 238             return 1;
 239         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 240         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 241         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 242         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 243         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 244         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 245         case PIPE_SHADER_CAP_SUBROUTINES:
 246         case PIPE_SHADER_CAP_INTEGERS:
 247         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 248         case PIPE_SHADER_CAP_OUTPUT_READ:
 249             return 0;
 250         }
 251         break;
 252     }
 253     return 0;
 254 }
 255
 256 static float r300_get_paramf(struct pipe_screen* pscreen,
 257                              enum pipe_capf param)
 258 {
 259     struct r300_screen* r300screen = r300_screen(pscreen);
 260
 261     switch (param) {
 262         case PIPE_CAPF_MAX_LINE_WIDTH:
 263         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 264         case PIPE_CAPF_MAX_POINT_WIDTH:
 265         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 266             /* The maximum dimensions of the colorbuffer are our practical
 267              * rendering limits. 2048 pixels should be enough for anybody. */
 268             if (r300screen->caps.is_r500) {
 269                 return 4096.0f;
 270             } else if (r300screen->caps.is_r400) {
 271                 return 4021.0f;
 272             } else {
 273                 return 2560.0f;
 274             }
 275         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 276             return 16.0f;
 277         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 278             return 16.0f;
 279         case PIPE_CAPF_GUARD_BAND_LEFT:
 280         case PIPE_CAPF_GUARD_BAND_TOP:
 281         case PIPE_CAPF_GUARD_BAND_RIGHT:
 282         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 283             /* XXX I don't know what these should be but the least we can do is
 284              * silence the potential error message */
 285             return 0.0f;
 286         default:
 287             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 288                          param);
 289             return 0.0f;
 290     }
 291 }
 292
 293 static int r300_get_video_param(struct pipe_screen *screen,
 294                                 enum pipe_video_profile profile,
 295                                 enum pipe_video_cap param)
 296 {
 297    switch (param) {
 298       case PIPE_VIDEO_CAP_SUPPORTED:
 299          return vl_profile_supported(screen, profile);
 300       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 301          return 0;
 302       case PIPE_VIDEO_CAP_MAX_WIDTH:
 303       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 304          return vl_video_buffer_max_size(screen);
 305       case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
 306          return vl_num_buffers_desired(screen, profile);
 307       default:
 308          return 0;
 309    }
 310 }
 311
 312 static boolean r300_is_format_supported(struct pipe_screen* screen,
 313                                         enum pipe_format format,
 314                                         enum pipe_texture_target target,
 315                                         unsigned sample_count,
 316                                         unsigned usage)
 317 {
 318     uint32_t retval = 0;
 319     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 320     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 321     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 322     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 323                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 324                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 325                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 326     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 327                        format == PIPE_FORMAT_RGTC1_SNORM ||
 328                        format == PIPE_FORMAT_LATC1_UNORM ||
 329                        format == PIPE_FORMAT_LATC1_SNORM;
 330     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 331                        format == PIPE_FORMAT_RGTC2_SNORM ||
 332                        format == PIPE_FORMAT_LATC2_UNORM ||
 333                        format == PIPE_FORMAT_LATC2_SNORM;
 334     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 335                             format == PIPE_FORMAT_R16G16_FLOAT ||
 336                             format == PIPE_FORMAT_A16_FLOAT ||
 337                             format == PIPE_FORMAT_L16_FLOAT ||
 338                             format == PIPE_FORMAT_L16A16_FLOAT ||
 339                             format == PIPE_FORMAT_I16_FLOAT;
 340     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 341                             format == PIPE_FORMAT_R16G16_FLOAT ||
 342                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 343                             format == PIPE_FORMAT_R16G16B16A16_FLOAT;
 344     boolean is_fixed = format == PIPE_FORMAT_R32_FIXED ||
 345                        format == PIPE_FORMAT_R32G32_FIXED ||
 346                        format == PIPE_FORMAT_R32G32B32_FIXED ||
 347                        format == PIPE_FORMAT_R32G32B32A32_FIXED;
 348
 349     if (!util_format_is_supported(format, usage))
 350        return FALSE;
 351
 352     /* Check multisampling support. */
 353     switch (sample_count) {
 354         case 0:
 355         case 1:
 356             break;
 357         case 2:
 358         case 3:
 359         case 4:
 360         case 6:
 361             return FALSE;
 362 #if 0
 363             if (usage != PIPE_BIND_RENDER_TARGET ||
 364                 !util_format_is_rgba8_variant(
 365                     util_format_description(format))) {
 366                 return FALSE;
 367             }
 368 #endif
 369             break;
 370         default:
 371             return FALSE;
 372     }
 373
 374     /* Check sampler format support. */
 375     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 376         /* ATI1N is r5xx-only. */
 377         (is_r500 || !is_ati1n) &&
 378         /* ATI2N is supported on r4xx-r5xx. */
 379         (is_r400 || is_r500 || !is_ati2n) &&
 380         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 381         (drm_2_8_0 || !is_x16f_xy16f) &&
 382         r300_is_sampler_format_supported(format)) {
 383         retval |= PIPE_BIND_SAMPLER_VIEW;
 384     }
 385
 386     /* Check colorbuffer format support. */
 387     if ((usage & (PIPE_BIND_RENDER_TARGET |
 388                   PIPE_BIND_DISPLAY_TARGET |
 389                   PIPE_BIND_SCANOUT |
 390                   PIPE_BIND_SHARED)) &&
 391         /* 2101010 cannot be rendered to on non-r5xx. */
 392         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 393         r300_is_colorbuffer_format_supported(format)) {
 394         retval |= usage &
 395             (PIPE_BIND_RENDER_TARGET |
 396              PIPE_BIND_DISPLAY_TARGET |
 397              PIPE_BIND_SCANOUT |
 398              PIPE_BIND_SHARED);
 399     }
 400
 401     /* Check depth-stencil format support. */
 402     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 403         r300_is_zs_format_supported(format)) {
 404         retval |= PIPE_BIND_DEPTH_STENCIL;
 405     }
 406
 407     /* Check vertex buffer format support. */
 408     if (usage & PIPE_BIND_VERTEX_BUFFER &&
 409         /* Half float is supported on >= R400. */
 410         (is_r400 || is_r500 || !is_half_float) &&
 411         /* We have a fallback for FIXED. */
 412         (is_fixed || r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT)) {
 413         retval |= PIPE_BIND_VERTEX_BUFFER;
 414     }
 415
 416     /* Transfers are always supported. */
 417     if (usage & PIPE_BIND_TRANSFER_READ)
 418         retval |= PIPE_BIND_TRANSFER_READ;
 419     if (usage & PIPE_BIND_TRANSFER_WRITE)
 420         retval |= PIPE_BIND_TRANSFER_WRITE;
 421
 422     return retval == usage;
 423 }
 424
 425 static void r300_destroy_screen(struct pipe_screen* pscreen)
 426 {
 427     struct r300_screen* r300screen = r300_screen(pscreen);
 428     struct radeon_winsys *rws = radeon_winsys(pscreen);
 429
 430     util_slab_destroy(&r300screen->pool_buffers);
 431     pipe_mutex_destroy(r300screen->num_contexts_mutex);
 432
 433     if (rws)
 434       rws->destroy(rws);
 435
 436     FREE(r300screen);
 437 }
 438
 439 static void r300_fence_reference(struct pipe_screen *screen,
 440                                  struct pipe_fence_handle **ptr,
 441                                  struct pipe_fence_handle *fence)
 442 {
 443     pb_reference((struct pb_buffer**)ptr,
 444                              (struct pb_buffer*)fence);
 445 }
 446
 447 static boolean r300_fence_signalled(struct pipe_screen *screen,
 448                                     struct pipe_fence_handle *fence)
 449 {
 450     struct radeon_winsys *rws = r300_screen(screen)->rws;
 451     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 452
 453     return !rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE);
 454 }
 455
 456 static boolean r300_fence_finish(struct pipe_screen *screen,
 457                                  struct pipe_fence_handle *fence,
 458                                  uint64_t timeout)
 459 {
 460     struct radeon_winsys *rws = r300_screen(screen)->rws;
 461     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 462
 463     if (timeout != PIPE_TIMEOUT_INFINITE) {
 464         int64_t start_time = os_time_get();
 465
 466         /* Convert to microseconds. */
 467         timeout /= 1000;
 468
 469         /* Wait in a loop. */
 470         while (rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE)) {
 471             if (os_time_get() - start_time >= timeout) {
 472                 return FALSE;
 473             }
 474             os_time_sleep(10);
 475         }
 476         return TRUE;
 477     }
 478
 479     rws->buffer_wait(rfence, RADEON_USAGE_READWRITE);
 480     return TRUE;
 481 }
 482
 483 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 484 {
 485     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 486
 487     if (!r300screen) {
 488         FREE(r300screen);
 489         return NULL;
 490     }
 491
 492     rws->query_info(rws, &r300screen->info);
 493
 494     r300_init_debug(r300screen);
 495     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 496
 497     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 498         r300screen->caps.zmask_ram = 0;
 499     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 500         r300screen->caps.hiz_ram = 0;
 501
 502     if (r300screen->info.drm_minor < 8)
 503         r300screen->caps.has_us_format = FALSE;
 504
 505     pipe_mutex_init(r300screen->num_contexts_mutex);
 506
 507     util_slab_create(&r300screen->pool_buffers,
 508                      sizeof(struct r300_resource), 64,
 509                      UTIL_SLAB_SINGLETHREADED);
 510
 511     r300screen->rws = rws;
 512     r300screen->screen.winsys = (struct pipe_winsys*)rws;
 513     r300screen->screen.destroy = r300_destroy_screen;
 514     r300screen->screen.get_name = r300_get_name;
 515     r300screen->screen.get_vendor = r300_get_vendor;
 516     r300screen->screen.get_param = r300_get_param;
 517     r300screen->screen.get_shader_param = r300_get_shader_param;
 518     r300screen->screen.get_paramf = r300_get_paramf;
 519     r300screen->screen.get_video_param = r300_get_video_param;
 520     r300screen->screen.is_format_supported = r300_is_format_supported;
 521     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 522     r300screen->screen.context_create = r300_create_context;
 523     r300screen->screen.fence_reference = r300_fence_reference;
 524     r300screen->screen.fence_signalled = r300_fence_signalled;
 525     r300screen->screen.fence_finish = r300_fence_finish;
 526
 527     r300_init_screen_resource_functions(r300screen);
 528
 529     util_format_s3tc_init();
 530
 531     return &r300screen->screen;
 532 }