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
  34 #include "dri_screen.h"
  35 #include "dri_context.h"
  36
  37 #include "util/u_inlines.h"
  38 #include "pipe/p_screen.h"
  39 #include "pipe/p_format.h"
  40 #include "pipe-loader/pipe_loader.h"
  41 #include "state_tracker/st_gl_api.h" /* for st_gl_api_create */
  42 #include "state_tracker/drm_driver.h"
  43
  44 #include "util/u_debug.h"
  45 #include "util/u_format_s3tc.h"
  46
  47 #define MSAA_VISUAL_MAX_SAMPLES 32
  48
  49 #undef false
  50
  51 const __DRIconfigOptionsExtension gallium_config_options = {
  52    .base = { __DRI_CONFIG_OPTIONS, 2 },
  53    .xml = gallium_driinfo_xml,
  54    .getXml = pipe_loader_get_driinfo_xml
  55 };
  56
  57 #define false 0
  58
  59 static void
  60 dri_fill_st_options(struct dri_screen *screen)
  61 {
  62    struct st_config_options *options = &screen->options;
  63    const struct driOptionCache *optionCache = &screen->dev->option_cache;
  64
  65    options->disable_blend_func_extended =
  66       driQueryOptionb(optionCache, "disable_blend_func_extended");
  67    options->disable_glsl_line_continuations =
  68       driQueryOptionb(optionCache, "disable_glsl_line_continuations");
  69    options->force_glsl_extensions_warn =
  70       driQueryOptionb(optionCache, "force_glsl_extensions_warn");
  71    options->force_glsl_version =
  72       driQueryOptioni(optionCache, "force_glsl_version");
  73    options->allow_glsl_extension_directive_midshader =
  74       driQueryOptionb(optionCache, "allow_glsl_extension_directive_midshader");
  75    options->allow_glsl_builtin_const_expression =
  76       driQueryOptionb(optionCache, "allow_glsl_builtin_const_expression");
  77    options->allow_glsl_relaxed_es =
  78       driQueryOptionb(optionCache, "allow_glsl_relaxed_es");
  79    options->allow_glsl_builtin_variable_redeclaration =
  80       driQueryOptionb(optionCache, "allow_glsl_builtin_variable_redeclaration");
  81    options->allow_higher_compat_version =
  82       driQueryOptionb(optionCache, "allow_higher_compat_version");
  83    options->glsl_zero_init = driQueryOptionb(optionCache, "glsl_zero_init");
  84    options->force_glsl_abs_sqrt =
  85       driQueryOptionb(optionCache, "force_glsl_abs_sqrt");
  86    options->allow_glsl_cross_stage_interpolation_mismatch =
  87       driQueryOptionb(optionCache, "allow_glsl_cross_stage_interpolation_mismatch");
  88    options->allow_glsl_layout_qualifier_on_function_parameters =
  89       driQueryOptionb(optionCache, "allow_glsl_layout_qualifier_on_function_parameters");
  90
  91    driComputeOptionsSha1(optionCache, options->config_options_sha1);
  92 }
  93
  94 static unsigned
  95 dri_loader_get_cap(struct dri_screen *screen, enum dri_loader_cap cap)
  96 {
  97    const __DRIdri2LoaderExtension *dri2_loader = screen->sPriv->dri2.loader;
  98    const __DRIimageLoaderExtension *image_loader = screen->sPriv->image.loader;
  99
 100    if (dri2_loader && dri2_loader->base.version >= 4 &&
 101        dri2_loader->getCapability)
 102       return dri2_loader->getCapability(screen->sPriv->loaderPrivate, cap);
 103
 104    if (image_loader && image_loader->base.version >= 2 &&
 105        image_loader->getCapability)
 106       return image_loader->getCapability(screen->sPriv->loaderPrivate, cap);
 107
 108    return 0;
 109 }
 110
 111 static const __DRIconfig **
 112 dri_fill_in_modes(struct dri_screen *screen)
 113 {
 114    static const mesa_format mesa_formats[] = {
 115       MESA_FORMAT_B10G10R10A2_UNORM,
 116       MESA_FORMAT_B10G10R10X2_UNORM,
 117       MESA_FORMAT_R10G10B10A2_UNORM,
 118       MESA_FORMAT_R10G10B10X2_UNORM,
 119       MESA_FORMAT_B8G8R8A8_UNORM,
 120       MESA_FORMAT_B8G8R8X8_UNORM,
 121       MESA_FORMAT_B8G8R8A8_SRGB,
 122       MESA_FORMAT_B8G8R8X8_SRGB,
 123       MESA_FORMAT_B5G6R5_UNORM,
 124
 125       /* The 32-bit RGBA format must not precede the 32-bit BGRA format.
 126        * Likewise for RGBX and BGRX.  Otherwise, the GLX client and the GLX
 127        * server may disagree on which format the GLXFBConfig represents,
 128        * resulting in swapped color channels.
 129        *
 130        * The problem, as of 2017-05-30:
 131        * When matching a GLXFBConfig to a __DRIconfig, GLX ignores the channel
 132        * order and chooses the first __DRIconfig with the expected channel
 133        * sizes. Specifically, GLX compares the GLXFBConfig's and __DRIconfig's
 134        * __DRI_ATTRIB_{CHANNEL}_SIZE but ignores __DRI_ATTRIB_{CHANNEL}_MASK.
 135        *
 136        * EGL does not suffer from this problem. It correctly compares the
 137        * channel masks when matching EGLConfig to __DRIconfig.
 138        */
 139
 140       /* Required by Android, for HAL_PIXEL_FORMAT_RGBA_8888. */
 141       MESA_FORMAT_R8G8B8A8_UNORM,
 142
 143       /* Required by Android, for HAL_PIXEL_FORMAT_RGBX_8888. */
 144       MESA_FORMAT_R8G8B8X8_UNORM,
 145    };
 146    static const enum pipe_format pipe_formats[] = {
 147       PIPE_FORMAT_B10G10R10A2_UNORM,
 148       PIPE_FORMAT_B10G10R10X2_UNORM,
 149       PIPE_FORMAT_R10G10B10A2_UNORM,
 150       PIPE_FORMAT_R10G10B10X2_UNORM,
 151       PIPE_FORMAT_BGRA8888_UNORM,
 152       PIPE_FORMAT_BGRX8888_UNORM,
 153       PIPE_FORMAT_BGRA8888_SRGB,
 154       PIPE_FORMAT_BGRX8888_SRGB,
 155       PIPE_FORMAT_B5G6R5_UNORM,
 156       PIPE_FORMAT_RGBA8888_UNORM,
 157       PIPE_FORMAT_RGBX8888_UNORM,
 158    };
 159    mesa_format format;
 160    __DRIconfig **configs = NULL;
 161    uint8_t depth_bits_array[5];
 162    uint8_t stencil_bits_array[5];
 163    unsigned depth_buffer_factor;
 164    unsigned msaa_samples_max;
 165    unsigned i;
 166    struct pipe_screen *p_screen = screen->base.screen;
 167    bool pf_z16, pf_x8z24, pf_z24x8, pf_s8z24, pf_z24s8, pf_z32;
 168    bool mixed_color_depth;
 169    bool allow_rgb10;
 170
 171    static const GLenum back_buffer_modes[] = {
 172       __DRI_ATTRIB_SWAP_NONE, __DRI_ATTRIB_SWAP_UNDEFINED,
 173       __DRI_ATTRIB_SWAP_COPY
 174    };
 175
 176    if (driQueryOptionb(&screen->dev->option_cache, "always_have_depth_buffer")) {
 177       /* all visuals will have a depth buffer */
 178       depth_buffer_factor = 0;
 179    }
 180    else {
 181       depth_bits_array[0] = 0;
 182       stencil_bits_array[0] = 0;
 183       depth_buffer_factor = 1;
 184    }
 185
 186    allow_rgb10 = driQueryOptionb(&screen->dev->option_cache, "allow_rgb10_configs");
 187
 188    msaa_samples_max = (screen->st_api->feature_mask & ST_API_FEATURE_MS_VISUALS_MASK)
 189       ? MSAA_VISUAL_MAX_SAMPLES : 1;
 190
 191    pf_x8z24 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z24X8_UNORM,
 192                                             PIPE_TEXTURE_2D, 0, 0,
 193                                             PIPE_BIND_DEPTH_STENCIL);
 194    pf_z24x8 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_X8Z24_UNORM,
 195                                             PIPE_TEXTURE_2D, 0, 0,
 196                                             PIPE_BIND_DEPTH_STENCIL);
 197    pf_s8z24 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z24_UNORM_S8_UINT,
 198                                             PIPE_TEXTURE_2D, 0, 0,
 199                                             PIPE_BIND_DEPTH_STENCIL);
 200    pf_z24s8 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_S8_UINT_Z24_UNORM,
 201                                             PIPE_TEXTURE_2D, 0, 0,
 202                                             PIPE_BIND_DEPTH_STENCIL);
 203    pf_z16 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z16_UNORM,
 204                                           PIPE_TEXTURE_2D, 0, 0,
 205                                           PIPE_BIND_DEPTH_STENCIL);
 206    pf_z32 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z32_UNORM,
 207                                           PIPE_TEXTURE_2D, 0, 0,
 208                                           PIPE_BIND_DEPTH_STENCIL);
 209
 210    if (pf_z16) {
 211       depth_bits_array[depth_buffer_factor] = 16;
 212       stencil_bits_array[depth_buffer_factor++] = 0;
 213    }
 214    if (pf_x8z24 || pf_z24x8) {
 215       depth_bits_array[depth_buffer_factor] = 24;
 216       stencil_bits_array[depth_buffer_factor++] = 0;
 217       screen->d_depth_bits_last = pf_x8z24;
 218    }
 219    if (pf_s8z24 || pf_z24s8) {
 220       depth_bits_array[depth_buffer_factor] = 24;
 221       stencil_bits_array[depth_buffer_factor++] = 8;
 222       screen->sd_depth_bits_last = pf_s8z24;
 223    }
 224    if (pf_z32) {
 225       depth_bits_array[depth_buffer_factor] = 32;
 226       stencil_bits_array[depth_buffer_factor++] = 0;
 227    }
 228
 229    mixed_color_depth =
 230       p_screen->get_param(p_screen, PIPE_CAP_MIXED_COLOR_DEPTH_BITS);
 231
 232    assert(ARRAY_SIZE(mesa_formats) == ARRAY_SIZE(pipe_formats));
 233
 234    /* Expose only BGRA ordering if the loader doesn't support RGBA ordering. */
 235    unsigned num_formats;
 236    if (dri_loader_get_cap(screen, DRI_LOADER_CAP_RGBA_ORDERING))
 237       num_formats = ARRAY_SIZE(mesa_formats);
 238    else
 239       num_formats = ARRAY_SIZE(mesa_formats) - 2; /* all - RGBA_ORDERING formats */
 240
 241    /* Add configs. */
 242    for (format = 0; format < num_formats; format++) {
 243       __DRIconfig **new_configs = NULL;
 244       unsigned num_msaa_modes = 0; /* includes a single-sample mode */
 245       uint8_t msaa_modes[MSAA_VISUAL_MAX_SAMPLES];
 246
 247       if (!allow_rgb10 &&
 248           (mesa_formats[format] == MESA_FORMAT_B10G10R10A2_UNORM ||
 249            mesa_formats[format] == MESA_FORMAT_B10G10R10X2_UNORM ||
 250            mesa_formats[format] == MESA_FORMAT_R10G10B10A2_UNORM ||
 251            mesa_formats[format] == MESA_FORMAT_R10G10B10X2_UNORM))
 252          continue;
 253
 254       if (!p_screen->is_format_supported(p_screen, pipe_formats[format],
 255                                          PIPE_TEXTURE_2D, 0, 0,
 256                                          PIPE_BIND_RENDER_TARGET |
 257                                          PIPE_BIND_DISPLAY_TARGET))
 258          continue;
 259
 260       for (i = 1; i <= msaa_samples_max; i++) {
 261          int samples = i > 1 ? i : 0;
 262
 263          if (p_screen->is_format_supported(p_screen, pipe_formats[format],
 264                                            PIPE_TEXTURE_2D, samples, samples,
 265                                            PIPE_BIND_RENDER_TARGET)) {
 266             msaa_modes[num_msaa_modes++] = samples;
 267          }
 268       }
 269
 270       if (num_msaa_modes) {
 271          /* Single-sample configs with an accumulation buffer. */
 272          new_configs = driCreateConfigs(mesa_formats[format],
 273                                         depth_bits_array, stencil_bits_array,
 274                                         depth_buffer_factor, back_buffer_modes,
 275                                         ARRAY_SIZE(back_buffer_modes),
 276                                         msaa_modes, 1,
 277                                         GL_TRUE, !mixed_color_depth, GL_FALSE);
 278          configs = driConcatConfigs(configs, new_configs);
 279
 280          /* Multi-sample configs without an accumulation buffer. */
 281          if (num_msaa_modes > 1) {
 282             new_configs = driCreateConfigs(mesa_formats[format],
 283                                            depth_bits_array, stencil_bits_array,
 284                                            depth_buffer_factor, back_buffer_modes,
 285                                            ARRAY_SIZE(back_buffer_modes),
 286                                            msaa_modes+1, num_msaa_modes-1,
 287                                            GL_FALSE, !mixed_color_depth, GL_FALSE);
 288             configs = driConcatConfigs(configs, new_configs);
 289          }
 290       }
 291    }
 292
 293    if (configs == NULL) {
 294       debug_printf("%s: driCreateConfigs failed\n", __FUNCTION__);
 295       return NULL;
 296    }
 297
 298    return (const __DRIconfig **)configs;
 299 }
 300
 301 /**
 302  * Roughly the converse of dri_fill_in_modes.
 303  */
 304 void
 305 dri_fill_st_visual(struct st_visual *stvis,
 306                    const struct dri_screen *screen,
 307                    const struct gl_config *mode)
 308 {
 309    memset(stvis, 0, sizeof(*stvis));
 310
 311    if (!mode) {
 312       stvis->no_config = true;
 313       return;
 314    }
 315
 316    /* Deduce the color format. */
 317    switch (mode->redMask) {
 318    case 0x3FF00000:
 319       if (mode->alphaMask) {
 320          assert(mode->alphaMask == 0xC0000000);
 321          stvis->color_format = PIPE_FORMAT_B10G10R10A2_UNORM;
 322       } else {
 323          stvis->color_format = PIPE_FORMAT_B10G10R10X2_UNORM;
 324       }
 325       break;
 326
 327    case 0x000003FF:
 328       if (mode->alphaMask) {
 329          assert(mode->alphaMask == 0xC0000000);
 330          stvis->color_format = PIPE_FORMAT_R10G10B10A2_UNORM;
 331       } else {
 332          stvis->color_format = PIPE_FORMAT_R10G10B10X2_UNORM;
 333       }
 334       break;
 335
 336    case 0x00FF0000:
 337       if (mode->alphaMask) {
 338          assert(mode->alphaMask == 0xFF000000);
 339          stvis->color_format = mode->sRGBCapable ?
 340                                   PIPE_FORMAT_BGRA8888_SRGB :
 341                                   PIPE_FORMAT_BGRA8888_UNORM;
 342       } else {
 343          stvis->color_format = mode->sRGBCapable ?
 344                                   PIPE_FORMAT_BGRX8888_SRGB :
 345                                   PIPE_FORMAT_BGRX8888_UNORM;
 346       }
 347       break;
 348
 349    case 0x000000FF:
 350       if (mode->alphaMask) {
 351          assert(mode->alphaMask == 0xFF000000);
 352          stvis->color_format = mode->sRGBCapable ?
 353                                   PIPE_FORMAT_RGBA8888_SRGB :
 354                                   PIPE_FORMAT_RGBA8888_UNORM;
 355       } else {
 356          stvis->color_format = mode->sRGBCapable ?
 357                                   PIPE_FORMAT_RGBX8888_SRGB :
 358                                   PIPE_FORMAT_RGBX8888_UNORM;
 359       }
 360       break;
 361
 362    case 0x0000F800:
 363       stvis->color_format = PIPE_FORMAT_B5G6R5_UNORM;
 364       break;
 365
 366    default:
 367       assert(!"unsupported visual: invalid red mask");
 368       return;
 369    }
 370
 371    if (mode->sampleBuffers) {
 372       stvis->samples = mode->samples;
 373    }
 374
 375    switch (mode->depthBits) {
 376    default:
 377    case 0:
 378       stvis->depth_stencil_format = PIPE_FORMAT_NONE;
 379       break;
 380    case 16:
 381       stvis->depth_stencil_format = PIPE_FORMAT_Z16_UNORM;
 382       break;
 383    case 24:
 384       if (mode->stencilBits == 0) {
 385          stvis->depth_stencil_format = (screen->d_depth_bits_last) ?
 386                                           PIPE_FORMAT_Z24X8_UNORM:
 387                                           PIPE_FORMAT_X8Z24_UNORM;
 388       } else {
 389          stvis->depth_stencil_format = (screen->sd_depth_bits_last) ?
 390                                           PIPE_FORMAT_Z24_UNORM_S8_UINT:
 391                                           PIPE_FORMAT_S8_UINT_Z24_UNORM;
 392       }
 393       break;
 394    case 32:
 395       stvis->depth_stencil_format = PIPE_FORMAT_Z32_UNORM;
 396       break;
 397    }
 398
 399    stvis->accum_format = (mode->haveAccumBuffer) ?
 400       PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
 401
 402    stvis->buffer_mask |= ST_ATTACHMENT_FRONT_LEFT_MASK;
 403    stvis->render_buffer = ST_ATTACHMENT_FRONT_LEFT;
 404    if (mode->doubleBufferMode) {
 405       stvis->buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
 406       stvis->render_buffer = ST_ATTACHMENT_BACK_LEFT;
 407    }
 408    if (mode->stereoMode) {
 409       stvis->buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
 410       if (mode->doubleBufferMode)
 411          stvis->buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
 412    }
 413
 414    if (mode->haveDepthBuffer || mode->haveStencilBuffer)
 415       stvis->buffer_mask |= ST_ATTACHMENT_DEPTH_STENCIL_MASK;
 416    /* let the state tracker allocate the accum buffer */
 417 }
 418
 419 static bool
 420 dri_get_egl_image(struct st_manager *smapi,
 421                   void *egl_image,
 422                   struct st_egl_image *stimg)
 423 {
 424    struct dri_screen *screen = (struct dri_screen *)smapi;
 425    __DRIimage *img = NULL;
 426
 427    if (screen->lookup_egl_image) {
 428       img = screen->lookup_egl_image(screen, egl_image);
 429    }
 430
 431    if (!img)
 432       return FALSE;
 433
 434    stimg->texture = NULL;
 435    pipe_resource_reference(&stimg->texture, img->texture);
 436    switch (img->dri_components) {
 437    case __DRI_IMAGE_COMPONENTS_Y_U_V:
 438       stimg->format = PIPE_FORMAT_IYUV;
 439       break;
 440    case __DRI_IMAGE_COMPONENTS_Y_UV:
 441       stimg->format = PIPE_FORMAT_NV12;
 442       break;
 443    default:
 444       stimg->format = img->texture->format;
 445       break;
 446    }
 447    stimg->level = img->level;
 448    stimg->layer = img->layer;
 449
 450    return TRUE;
 451 }
 452
 453 static int
 454 dri_get_param(struct st_manager *smapi,
 455               enum st_manager_param param)
 456 {
 457    struct dri_screen *screen = (struct dri_screen *)smapi;
 458
 459    switch(param) {
 460    case ST_MANAGER_BROKEN_INVALIDATE:
 461       return screen->broken_invalidate;
 462    default:
 463       return 0;
 464    }
 465 }
 466
 467 void
 468 dri_destroy_screen_helper(struct dri_screen * screen)
 469 {
 470    if (screen->base.destroy)
 471       screen->base.destroy(&screen->base);
 472
 473    if (screen->st_api && screen->st_api->destroy)
 474       screen->st_api->destroy(screen->st_api);
 475
 476    if (screen->base.screen)
 477       screen->base.screen->destroy(screen->base.screen);
 478
 479    mtx_destroy(&screen->opencl_func_mutex);
 480 }
 481
 482 void
 483 dri_destroy_screen(__DRIscreen * sPriv)
 484 {
 485    struct dri_screen *screen = dri_screen(sPriv);
 486
 487    dri_destroy_screen_helper(screen);
 488
 489    pipe_loader_release(&screen->dev, 1);
 490
 491    /* The caller in dri_util preserves the fd ownership */
 492    free(screen);
 493    sPriv->driverPrivate = NULL;
 494    sPriv->extensions = NULL;
 495 }
 496
 497 static void
 498 dri_postprocessing_init(struct dri_screen *screen)
 499 {
 500    unsigned i;
 501
 502    for (i = 0; i < PP_FILTERS; i++) {
 503       screen->pp_enabled[i] = driQueryOptioni(&screen->dev->option_cache,
 504                                               pp_filters[i].name);
 505    }
 506 }
 507
 508 static void
 509 dri_set_background_context(struct st_context_iface *st,
 510                            struct util_queue_monitoring *queue_info)
 511 {
 512    struct dri_context *ctx = (struct dri_context *)st->st_manager_private;
 513    const __DRIbackgroundCallableExtension *backgroundCallable =
 514       ctx->sPriv->dri2.backgroundCallable;
 515
 516    /* Note: Mesa will only call this function if GL multithreading is enabled
 517     * We only do that if the loader exposed the __DRI_BACKGROUND_CALLABLE
 518     * extension. So we know that backgroundCallable is not NULL.
 519     */
 520    assert(backgroundCallable);
 521    backgroundCallable->setBackgroundContext(ctx->cPriv->loaderPrivate);
 522
 523    if (ctx->hud)
 524       hud_add_queue_for_monitoring(ctx->hud, queue_info);
 525 }
 526
 527 void
 528 dri_init_options(struct dri_screen *screen)
 529 {
 530    pipe_loader_load_options(screen->dev);
 531
 532    dri_fill_st_options(screen);
 533 }
 534
 535 const __DRIconfig **
 536 dri_init_screen_helper(struct dri_screen *screen,
 537                        struct pipe_screen *pscreen)
 538 {
 539    screen->base.screen = pscreen;
 540    screen->base.get_egl_image = dri_get_egl_image;
 541    screen->base.get_param = dri_get_param;
 542    screen->base.set_background_context = dri_set_background_context;
 543
 544    screen->st_api = st_gl_api_create();
 545    if (!screen->st_api)
 546       return NULL;
 547
 548    if(pscreen->get_param(pscreen, PIPE_CAP_NPOT_TEXTURES))
 549       screen->target = PIPE_TEXTURE_2D;
 550    else
 551       screen->target = PIPE_TEXTURE_RECT;
 552
 553    dri_postprocessing_init(screen);
 554
 555    screen->st_api->query_versions(screen->st_api, &screen->base,
 556                                   &screen->options,
 557                                   &screen->sPriv->max_gl_core_version,
 558                                   &screen->sPriv->max_gl_compat_version,
 559                                   &screen->sPriv->max_gl_es1_version,
 560                                   &screen->sPriv->max_gl_es2_version);
 561
 562    return dri_fill_in_modes(screen);
 563 }
 564
 565 /* vim: set sw=3 ts=8 sts=3 expandtab: */