src/gallium/state_trackers/dri/dri_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009, 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  * Author: Keith Whitwell <keithw@vmware.com>
  29  * Author: Jakob Bornecrantz <wallbraker@gmail.com>
  30  */
  31
  32 #include "utils.h"
  33 #include "xmlpool.h"
  34
  35 #include "dri_screen.h"
  36 #include "dri_context.h"
  37
  38 #include "util/u_inlines.h"
  39 #include "pipe/p_screen.h"
  40 #include "pipe/p_format.h"
  41 #include "pipe-loader/pipe_loader.h"
  42 #include "state_tracker/st_gl_api.h" /* for st_gl_api_create */
  43 #include "state_tracker/drm_driver.h"
  44
  45 #include "util/u_debug.h"
  46 #include "util/u_format_s3tc.h"
  47
  48 #define MSAA_VISUAL_MAX_SAMPLES 32
  49
  50 #undef false
  51
  52 const __DRIconfigOptionsExtension gallium_config_options = {
  53    .base = { __DRI_CONFIG_OPTIONS, 1 },
  54    .xml =
  55
  56    DRI_CONF_BEGIN
  57       DRI_CONF_SECTION_PERFORMANCE
  58          DRI_CONF_MESA_GLTHREAD("false")
  59          DRI_CONF_DISABLE_EXT_BUFFER_AGE("false")
  60          DRI_CONF_DISABLE_OML_SYNC_CONTROL("false")
  61       DRI_CONF_SECTION_END
  62
  63       DRI_CONF_SECTION_QUALITY
  64          DRI_CONF_FORCE_S3TC_ENABLE("false")
  65          DRI_CONF_PP_CELSHADE(0)
  66          DRI_CONF_PP_NORED(0)
  67          DRI_CONF_PP_NOGREEN(0)
  68          DRI_CONF_PP_NOBLUE(0)
  69          DRI_CONF_PP_JIMENEZMLAA(0, 0, 32)
  70          DRI_CONF_PP_JIMENEZMLAA_COLOR(0, 0, 32)
  71       DRI_CONF_SECTION_END
  72
  73       DRI_CONF_SECTION_DEBUG
  74          DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  75          DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  76          DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  77          DRI_CONF_DISABLE_SHADER_BIT_ENCODING("false")
  78          DRI_CONF_FORCE_GLSL_VERSION(0)
  79          DRI_CONF_ALLOW_GLSL_EXTENSION_DIRECTIVE_MIDSHADER("false")
  80          DRI_CONF_ALLOW_GLSL_BUILTIN_VARIABLE_REDECLARATION("false")
  81          DRI_CONF_ALLOW_HIGHER_COMPAT_VERSION("false")
  82          DRI_CONF_FORCE_GLSL_ABS_SQRT("false")
  83          DRI_CONF_GLSL_CORRECT_DERIVATIVES_AFTER_DISCARD("false")
  84       DRI_CONF_SECTION_END
  85
  86       DRI_CONF_SECTION_MISCELLANEOUS
  87          DRI_CONF_ALWAYS_HAVE_DEPTH_BUFFER("false")
  88          DRI_CONF_GLSL_ZERO_INIT("false")
  89       DRI_CONF_SECTION_END
  90    DRI_CONF_END
  91 };
  92
  93 #define false 0
  94
  95 static void
  96 dri_fill_st_options(struct dri_screen *screen)
  97 {
  98    struct st_config_options *options = &screen->options;
  99    const struct driOptionCache *optionCache = &screen->optionCache;
 100
 101    options->disable_blend_func_extended =
 102       driQueryOptionb(optionCache, "disable_blend_func_extended");
 103    options->disable_glsl_line_continuations =
 104       driQueryOptionb(optionCache, "disable_glsl_line_continuations");
 105    options->disable_shader_bit_encoding =
 106       driQueryOptionb(optionCache, "disable_shader_bit_encoding");
 107    options->force_glsl_extensions_warn =
 108       driQueryOptionb(optionCache, "force_glsl_extensions_warn");
 109    options->force_glsl_version =
 110       driQueryOptioni(optionCache, "force_glsl_version");
 111    options->force_s3tc_enable =
 112       driQueryOptionb(optionCache, "force_s3tc_enable");
 113    options->allow_glsl_extension_directive_midshader =
 114       driQueryOptionb(optionCache, "allow_glsl_extension_directive_midshader");
 115    options->allow_glsl_builtin_variable_redeclaration =
 116       driQueryOptionb(optionCache, "allow_glsl_builtin_variable_redeclaration");
 117    options->allow_higher_compat_version =
 118       driQueryOptionb(optionCache, "allow_higher_compat_version");
 119    options->glsl_zero_init = driQueryOptionb(optionCache, "glsl_zero_init");
 120    options->force_glsl_abs_sqrt =
 121       driQueryOptionb(optionCache, "force_glsl_abs_sqrt");
 122
 123    driComputeOptionsSha1(optionCache, options->config_options_sha1);
 124 }
 125
 126 static const __DRIconfig **
 127 dri_fill_in_modes(struct dri_screen *screen)
 128 {
 129    static const mesa_format mesa_formats[] = {
 130       MESA_FORMAT_B8G8R8A8_UNORM,
 131       MESA_FORMAT_B8G8R8X8_UNORM,
 132       MESA_FORMAT_B8G8R8A8_SRGB,
 133       MESA_FORMAT_B8G8R8X8_SRGB,
 134       MESA_FORMAT_B5G6R5_UNORM,
 135
 136       /* The 32-bit RGBA format must not precede the 32-bit BGRA format.
 137        * Likewise for RGBX and BGRX.  Otherwise, the GLX client and the GLX
 138        * server may disagree on which format the GLXFBConfig represents,
 139        * resulting in swapped color channels.
 140        *
 141        * The problem, as of 2017-05-30:
 142        * When matching a GLXFBConfig to a __DRIconfig, GLX ignores the channel
 143        * order and chooses the first __DRIconfig with the expected channel
 144        * sizes. Specifically, GLX compares the GLXFBConfig's and __DRIconfig's
 145        * __DRI_ATTRIB_{CHANNEL}_SIZE but ignores __DRI_ATTRIB_{CHANNEL}_MASK.
 146        *
 147        * EGL does not suffer from this problem. It correctly compares the
 148        * channel masks when matching EGLConfig to __DRIconfig.
 149        */
 150
 151       /* Required by Android, for HAL_PIXEL_FORMAT_RGBA_8888. */
 152       MESA_FORMAT_R8G8B8A8_UNORM,
 153
 154       /* Required by Android, for HAL_PIXEL_FORMAT_RGBX_8888. */
 155       MESA_FORMAT_R8G8B8X8_UNORM,
 156    };
 157    static const enum pipe_format pipe_formats[] = {
 158       PIPE_FORMAT_BGRA8888_UNORM,
 159       PIPE_FORMAT_BGRX8888_UNORM,
 160       PIPE_FORMAT_BGRA8888_SRGB,
 161       PIPE_FORMAT_BGRX8888_SRGB,
 162       PIPE_FORMAT_B5G6R5_UNORM,
 163       PIPE_FORMAT_RGBA8888_UNORM,
 164       PIPE_FORMAT_RGBX8888_UNORM,
 165    };
 166    mesa_format format;
 167    __DRIconfig **configs = NULL;
 168    uint8_t depth_bits_array[5];
 169    uint8_t stencil_bits_array[5];
 170    unsigned depth_buffer_factor;
 171    unsigned msaa_samples_max;
 172    unsigned i;
 173    struct pipe_screen *p_screen = screen->base.screen;
 174    boolean pf_z16, pf_x8z24, pf_z24x8, pf_s8z24, pf_z24s8, pf_z32;
 175    boolean mixed_color_depth;
 176
 177    static const GLenum back_buffer_modes[] = {
 178       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 179    };
 180
 181    if (driQueryOptionb(&screen->optionCache, "always_have_depth_buffer")) {
 182       /* all visuals will have a depth buffer */
 183       depth_buffer_factor = 0;
 184    }
 185    else {
 186       depth_bits_array[0] = 0;
 187       stencil_bits_array[0] = 0;
 188       depth_buffer_factor = 1;
 189    }
 190
 191    msaa_samples_max = (screen->st_api->feature_mask & ST_API_FEATURE_MS_VISUALS_MASK)
 192       ? MSAA_VISUAL_MAX_SAMPLES : 1;
 193
 194    pf_x8z24 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z24X8_UNORM,
 195                                             PIPE_TEXTURE_2D, 0,
 196                                             PIPE_BIND_DEPTH_STENCIL);
 197    pf_z24x8 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_X8Z24_UNORM,
 198                                             PIPE_TEXTURE_2D, 0,
 199                                             PIPE_BIND_DEPTH_STENCIL);
 200    pf_s8z24 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z24_UNORM_S8_UINT,
 201                                             PIPE_TEXTURE_2D, 0,
 202                                             PIPE_BIND_DEPTH_STENCIL);
 203    pf_z24s8 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_S8_UINT_Z24_UNORM,
 204                                             PIPE_TEXTURE_2D, 0,
 205                                             PIPE_BIND_DEPTH_STENCIL);
 206    pf_z16 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z16_UNORM,
 207                                           PIPE_TEXTURE_2D, 0,
 208                                           PIPE_BIND_DEPTH_STENCIL);
 209    pf_z32 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z32_UNORM,
 210                                           PIPE_TEXTURE_2D, 0,
 211                                           PIPE_BIND_DEPTH_STENCIL);
 212
 213    if (pf_z16) {
 214       depth_bits_array[depth_buffer_factor] = 16;
 215       stencil_bits_array[depth_buffer_factor++] = 0;
 216    }
 217    if (pf_x8z24 || pf_z24x8) {
 218       depth_bits_array[depth_buffer_factor] = 24;
 219       stencil_bits_array[depth_buffer_factor++] = 0;
 220       screen->d_depth_bits_last = pf_x8z24;
 221    }
 222    if (pf_s8z24 || pf_z24s8) {
 223       depth_bits_array[depth_buffer_factor] = 24;
 224       stencil_bits_array[depth_buffer_factor++] = 8;
 225       screen->sd_depth_bits_last = pf_s8z24;
 226    }
 227    if (pf_z32) {
 228       depth_bits_array[depth_buffer_factor] = 32;
 229       stencil_bits_array[depth_buffer_factor++] = 0;
 230    }
 231
 232    mixed_color_depth =
 233       p_screen->get_param(p_screen, PIPE_CAP_MIXED_COLOR_DEPTH_BITS);
 234
 235    assert(ARRAY_SIZE(mesa_formats) == ARRAY_SIZE(pipe_formats));
 236
 237    /* Add configs. */
 238    for (format = 0; format < ARRAY_SIZE(mesa_formats); format++) {
 239       __DRIconfig **new_configs = NULL;
 240       unsigned num_msaa_modes = 0; /* includes a single-sample mode */
 241       uint8_t msaa_modes[MSAA_VISUAL_MAX_SAMPLES];
 242
 243       if (!p_screen->is_format_supported(p_screen, pipe_formats[format],
 244                                          PIPE_TEXTURE_2D, 0,
 245                                          PIPE_BIND_RENDER_TARGET))
 246          continue;
 247
 248       for (i = 1; i <= msaa_samples_max; i++) {
 249          int samples = i > 1 ? i : 0;
 250
 251          if (p_screen->is_format_supported(p_screen, pipe_formats[format],
 252                                            PIPE_TEXTURE_2D, samples,
 253                                            PIPE_BIND_RENDER_TARGET)) {
 254             msaa_modes[num_msaa_modes++] = samples;
 255          }
 256       }
 257
 258       if (num_msaa_modes) {
 259          /* Single-sample configs with an accumulation buffer. */
 260          new_configs = driCreateConfigs(mesa_formats[format],
 261                                         depth_bits_array, stencil_bits_array,
 262                                         depth_buffer_factor, back_buffer_modes,
 263                                         ARRAY_SIZE(back_buffer_modes),
 264                                         msaa_modes, 1,
 265                                         GL_TRUE, !mixed_color_depth);
 266          configs = driConcatConfigs(configs, new_configs);
 267
 268          /* Multi-sample configs without an accumulation buffer. */
 269          if (num_msaa_modes > 1) {
 270             new_configs = driCreateConfigs(mesa_formats[format],
 271                                            depth_bits_array, stencil_bits_array,
 272                                            depth_buffer_factor, back_buffer_modes,
 273                                            ARRAY_SIZE(back_buffer_modes),
 274                                            msaa_modes+1, num_msaa_modes-1,
 275                                            GL_FALSE, !mixed_color_depth);
 276             configs = driConcatConfigs(configs, new_configs);
 277          }
 278       }
 279    }
 280
 281    if (configs == NULL) {
 282       debug_printf("%s: driCreateConfigs failed\n", __FUNCTION__);
 283       return NULL;
 284    }
 285
 286    return (const __DRIconfig **)configs;
 287 }
 288
 289 /**
 290  * Roughly the converse of dri_fill_in_modes.
 291  */
 292 void
 293 dri_fill_st_visual(struct st_visual *stvis, struct dri_screen *screen,
 294                    const struct gl_config *mode)
 295 {
 296    memset(stvis, 0, sizeof(*stvis));
 297
 298    if (!mode)
 299       return;
 300
 301    /* Deduce the color format. */
 302    switch (mode->redMask) {
 303    case 0x00FF0000:
 304       if (mode->alphaMask) {
 305          assert(mode->alphaMask == 0xFF000000);
 306          stvis->color_format = mode->sRGBCapable ?
 307                                   PIPE_FORMAT_BGRA8888_SRGB :
 308                                   PIPE_FORMAT_BGRA8888_UNORM;
 309       } else {
 310          stvis->color_format = mode->sRGBCapable ?
 311                                   PIPE_FORMAT_BGRX8888_SRGB :
 312                                   PIPE_FORMAT_BGRX8888_UNORM;
 313       }
 314       break;
 315
 316    case 0x000000FF:
 317       if (mode->alphaMask) {
 318          assert(mode->alphaMask == 0xFF000000);
 319          stvis->color_format = mode->sRGBCapable ?
 320                                   PIPE_FORMAT_RGBA8888_SRGB :
 321                                   PIPE_FORMAT_RGBA8888_UNORM;
 322       } else {
 323          stvis->color_format = mode->sRGBCapable ?
 324                                   PIPE_FORMAT_RGBX8888_SRGB :
 325                                   PIPE_FORMAT_RGBX8888_UNORM;
 326       }
 327       break;
 328
 329    case 0x0000F800:
 330       stvis->color_format = PIPE_FORMAT_B5G6R5_UNORM;
 331       break;
 332
 333    default:
 334       assert(!"unsupported visual: invalid red mask");
 335       return;
 336    }
 337
 338    if (mode->sampleBuffers) {
 339       stvis->samples = mode->samples;
 340    }
 341
 342    switch (mode->depthBits) {
 343    default:
 344    case 0:
 345       stvis->depth_stencil_format = PIPE_FORMAT_NONE;
 346       break;
 347    case 16:
 348       stvis->depth_stencil_format = PIPE_FORMAT_Z16_UNORM;
 349       break;
 350    case 24:
 351       if (mode->stencilBits == 0) {
 352          stvis->depth_stencil_format = (screen->d_depth_bits_last) ?
 353                                           PIPE_FORMAT_Z24X8_UNORM:
 354                                           PIPE_FORMAT_X8Z24_UNORM;
 355       } else {
 356          stvis->depth_stencil_format = (screen->sd_depth_bits_last) ?
 357                                           PIPE_FORMAT_Z24_UNORM_S8_UINT:
 358                                           PIPE_FORMAT_S8_UINT_Z24_UNORM;
 359       }
 360       break;
 361    case 32:
 362       stvis->depth_stencil_format = PIPE_FORMAT_Z32_UNORM;
 363       break;
 364    }
 365
 366    stvis->accum_format = (mode->haveAccumBuffer) ?
 367       PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
 368
 369    stvis->buffer_mask |= ST_ATTACHMENT_FRONT_LEFT_MASK;
 370    stvis->render_buffer = ST_ATTACHMENT_FRONT_LEFT;
 371    if (mode->doubleBufferMode) {
 372       stvis->buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
 373       stvis->render_buffer = ST_ATTACHMENT_BACK_LEFT;
 374    }
 375    if (mode->stereoMode) {
 376       stvis->buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
 377       if (mode->doubleBufferMode)
 378          stvis->buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
 379    }
 380
 381    if (mode->haveDepthBuffer || mode->haveStencilBuffer)
 382       stvis->buffer_mask |= ST_ATTACHMENT_DEPTH_STENCIL_MASK;
 383    /* let the state tracker allocate the accum buffer */
 384 }
 385
 386 static boolean
 387 dri_get_egl_image(struct st_manager *smapi,
 388                   void *egl_image,
 389                   struct st_egl_image *stimg)
 390 {
 391    struct dri_screen *screen = (struct dri_screen *)smapi;
 392    __DRIimage *img = NULL;
 393
 394    if (screen->lookup_egl_image) {
 395       img = screen->lookup_egl_image(screen, egl_image);
 396    }
 397
 398    if (!img)
 399       return FALSE;
 400
 401    stimg->texture = NULL;
 402    pipe_resource_reference(&stimg->texture, img->texture);
 403    switch (img->dri_components) {
 404    case __DRI_IMAGE_COMPONENTS_Y_U_V:
 405       stimg->format = PIPE_FORMAT_IYUV;
 406       break;
 407    case __DRI_IMAGE_COMPONENTS_Y_UV:
 408       stimg->format = PIPE_FORMAT_NV12;
 409       break;
 410    default:
 411       stimg->format = img->texture->format;
 412       break;
 413    }
 414    stimg->level = img->level;
 415    stimg->layer = img->layer;
 416
 417    return TRUE;
 418 }
 419
 420 static int
 421 dri_get_param(struct st_manager *smapi,
 422               enum st_manager_param param)
 423 {
 424    struct dri_screen *screen = (struct dri_screen *)smapi;
 425
 426    switch(param) {
 427    case ST_MANAGER_BROKEN_INVALIDATE:
 428       return screen->broken_invalidate;
 429    default:
 430       return 0;
 431    }
 432 }
 433
 434 static void
 435 dri_destroy_option_cache(struct dri_screen * screen)
 436 {
 437    int i;
 438
 439    if (screen->optionCache.info) {
 440       for (i = 0; i < (1 << screen->optionCache.tableSize); ++i) {
 441          free(screen->optionCache.info[i].name);
 442          free(screen->optionCache.info[i].ranges);
 443       }
 444       free(screen->optionCache.info);
 445    }
 446
 447    free(screen->optionCache.values);
 448
 449    /* Default values are copied to screen->optionCache->values in
 450     * initOptionCache. The info field, however, is a pointer copy, so don't free
 451     * that twice.
 452     */
 453    free(screen->optionCacheDefaults.values);
 454 }
 455
 456 void
 457 dri_destroy_screen_helper(struct dri_screen * screen)
 458 {
 459    if (screen->st_api && screen->st_api->destroy)
 460       screen->st_api->destroy(screen->st_api);
 461
 462    if (screen->base.screen)
 463       screen->base.screen->destroy(screen->base.screen);
 464
 465    dri_destroy_option_cache(screen);
 466    mtx_destroy(&screen->opencl_func_mutex);
 467 }
 468
 469 void
 470 dri_destroy_screen(__DRIscreen * sPriv)
 471 {
 472    struct dri_screen *screen = dri_screen(sPriv);
 473
 474    dri_destroy_screen_helper(screen);
 475
 476    pipe_loader_release(&screen->dev, 1);
 477
 478    free(screen);
 479    sPriv->driverPrivate = NULL;
 480    sPriv->extensions = NULL;
 481 }
 482
 483 static void
 484 dri_postprocessing_init(struct dri_screen *screen)
 485 {
 486    unsigned i;
 487
 488    for (i = 0; i < PP_FILTERS; i++) {
 489       screen->pp_enabled[i] = driQueryOptioni(&screen->optionCache,
 490                                               pp_filters[i].name);
 491    }
 492 }
 493
 494 static void
 495 dri_set_background_context(struct st_context_iface *st,
 496                            struct util_queue_monitoring *queue_info)
 497 {
 498    struct dri_context *ctx = (struct dri_context *)st->st_manager_private;
 499    const __DRIbackgroundCallableExtension *backgroundCallable =
 500       ctx->sPriv->dri2.backgroundCallable;
 501
 502    /* Note: Mesa will only call this function if GL multithreading is enabled
 503     * We only do that if the loader exposed the __DRI_BACKGROUND_CALLABLE
 504     * extension. So we know that backgroundCallable is not NULL.
 505     */
 506    assert(backgroundCallable);
 507    backgroundCallable->setBackgroundContext(ctx->cPriv->loaderPrivate);
 508
 509    if (ctx->hud)
 510       hud_add_queue_for_monitoring(ctx->hud, queue_info);
 511 }
 512
 513 unsigned
 514 dri_init_options_get_screen_flags(struct dri_screen *screen,
 515                                   const char* driver_name)
 516 {
 517    unsigned flags = 0;
 518
 519    driParseOptionInfo(&screen->optionCacheDefaults, gallium_config_options.xml);
 520    driParseConfigFiles(&screen->optionCache,
 521                        &screen->optionCacheDefaults,
 522                        screen->sPriv->myNum,
 523                        driver_name);
 524    dri_fill_st_options(screen);
 525
 526    if (driQueryOptionb(&screen->optionCache,
 527                        "glsl_correct_derivatives_after_discard"))
 528       flags |= PIPE_SCREEN_ENABLE_CORRECT_TGSI_DERIVATIVES_AFTER_KILL;
 529
 530    return flags;
 531 }
 532
 533 const __DRIconfig **
 534 dri_init_screen_helper(struct dri_screen *screen,
 535                        struct pipe_screen *pscreen)
 536 {
 537    screen->base.screen = pscreen;
 538    screen->base.get_egl_image = dri_get_egl_image;
 539    screen->base.get_param = dri_get_param;
 540    screen->base.set_background_context = dri_set_background_context;
 541
 542    screen->st_api = st_gl_api_create();
 543    if (!screen->st_api)
 544       return NULL;
 545
 546    if(pscreen->get_param(pscreen, PIPE_CAP_NPOT_TEXTURES))
 547       screen->target = PIPE_TEXTURE_2D;
 548    else
 549       screen->target = PIPE_TEXTURE_RECT;
 550
 551    /* Handle force_s3tc_enable. */
 552    if (!util_format_s3tc_enabled && screen->options.force_s3tc_enable) {
 553       /* Ensure libtxc_dxtn has been loaded if available.
 554        * Forcing S3TC on before calling this would prevent loading
 555        * the library.
 556        * This is just a precaution, the driver should have called it
 557        * already.
 558        */
 559       util_format_s3tc_init();
 560
 561       util_format_s3tc_enabled = TRUE;
 562    }
 563
 564    dri_postprocessing_init(screen);
 565
 566    screen->st_api->query_versions(screen->st_api, &screen->base,
 567                                   &screen->options,
 568                                   &screen->sPriv->max_gl_core_version,
 569                                   &screen->sPriv->max_gl_compat_version,
 570                                   &screen->sPriv->max_gl_es1_version,
 571                                   &screen->sPriv->max_gl_es2_version);
 572
 573    return dri_fill_in_modes(screen);
 574 }
 575
 576 /* vim: set sw=3 ts=8 sts=3 expandtab: */