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 "util/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_MESA_NO_ERROR("false")
  60          DRI_CONF_DISABLE_EXT_BUFFER_AGE("false")
  61          DRI_CONF_DISABLE_OML_SYNC_CONTROL("false")
  62       DRI_CONF_SECTION_END
  63
  64       DRI_CONF_SECTION_QUALITY
  65          DRI_CONF_FORCE_S3TC_ENABLE("false")
  66          DRI_CONF_PP_CELSHADE(0)
  67          DRI_CONF_PP_NORED(0)
  68          DRI_CONF_PP_NOGREEN(0)
  69          DRI_CONF_PP_NOBLUE(0)
  70          DRI_CONF_PP_JIMENEZMLAA(0, 0, 32)
  71          DRI_CONF_PP_JIMENEZMLAA_COLOR(0, 0, 32)
  72       DRI_CONF_SECTION_END
  73
  74       DRI_CONF_SECTION_DEBUG
  75          DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  76          DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  77          DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  78          DRI_CONF_DISABLE_SHADER_BIT_ENCODING("false")
  79          DRI_CONF_FORCE_GLSL_VERSION(0)
  80          DRI_CONF_ALLOW_GLSL_EXTENSION_DIRECTIVE_MIDSHADER("false")
  81          DRI_CONF_ALLOW_GLSL_BUILTIN_VARIABLE_REDECLARATION("false")
  82          DRI_CONF_ALLOW_HIGHER_COMPAT_VERSION("false")
  83          DRI_CONF_FORCE_GLSL_ABS_SQRT("false")
  84          DRI_CONF_GLSL_CORRECT_DERIVATIVES_AFTER_DISCARD("false")
  85       DRI_CONF_SECTION_END
  86
  87       DRI_CONF_SECTION_MISCELLANEOUS
  88          DRI_CONF_ALWAYS_HAVE_DEPTH_BUFFER("false")
  89          DRI_CONF_GLSL_ZERO_INIT("false")
  90       DRI_CONF_SECTION_END
  91    DRI_CONF_END
  92 };
  93
  94 #define false 0
  95
  96 static void
  97 dri_fill_st_options(struct dri_screen *screen)
  98 {
  99    struct st_config_options *options = &screen->options;
 100    const struct driOptionCache *optionCache = &screen->optionCache;
 101
 102    options->disable_blend_func_extended =
 103       driQueryOptionb(optionCache, "disable_blend_func_extended");
 104    options->disable_glsl_line_continuations =
 105       driQueryOptionb(optionCache, "disable_glsl_line_continuations");
 106    options->disable_shader_bit_encoding =
 107       driQueryOptionb(optionCache, "disable_shader_bit_encoding");
 108    options->force_glsl_extensions_warn =
 109       driQueryOptionb(optionCache, "force_glsl_extensions_warn");
 110    options->force_glsl_version =
 111       driQueryOptioni(optionCache, "force_glsl_version");
 112    options->force_s3tc_enable =
 113       driQueryOptionb(optionCache, "force_s3tc_enable");
 114    options->allow_glsl_extension_directive_midshader =
 115       driQueryOptionb(optionCache, "allow_glsl_extension_directive_midshader");
 116    options->allow_glsl_builtin_variable_redeclaration =
 117       driQueryOptionb(optionCache, "allow_glsl_builtin_variable_redeclaration");
 118    options->allow_higher_compat_version =
 119       driQueryOptionb(optionCache, "allow_higher_compat_version");
 120    options->glsl_zero_init = driQueryOptionb(optionCache, "glsl_zero_init");
 121    options->force_glsl_abs_sqrt =
 122       driQueryOptionb(optionCache, "force_glsl_abs_sqrt");
 123
 124    driComputeOptionsSha1(optionCache, options->config_options_sha1);
 125 }
 126
 127 static unsigned
 128 dri_loader_get_cap(struct dri_screen *screen, enum dri_loader_cap cap)
 129 {
 130    const __DRIdri2LoaderExtension *dri2_loader = screen->sPriv->dri2.loader;
 131    const __DRIimageLoaderExtension *image_loader = screen->sPriv->image.loader;
 132
 133    if (dri2_loader && dri2_loader->base.version >= 4)
 134       return dri2_loader->getCapability(screen->sPriv->loaderPrivate, cap);
 135
 136    if (image_loader && image_loader->base.version >= 2)
 137       return image_loader->getCapability(screen->sPriv->loaderPrivate, cap);
 138
 139    return 0;
 140 }
 141
 142 static const __DRIconfig **
 143 dri_fill_in_modes(struct dri_screen *screen)
 144 {
 145    static const mesa_format mesa_formats[] = {
 146       MESA_FORMAT_B8G8R8A8_UNORM,
 147       MESA_FORMAT_B8G8R8X8_UNORM,
 148       MESA_FORMAT_B8G8R8A8_SRGB,
 149       MESA_FORMAT_B8G8R8X8_SRGB,
 150       MESA_FORMAT_B5G6R5_UNORM,
 151
 152       /* The 32-bit RGBA format must not precede the 32-bit BGRA format.
 153        * Likewise for RGBX and BGRX.  Otherwise, the GLX client and the GLX
 154        * server may disagree on which format the GLXFBConfig represents,
 155        * resulting in swapped color channels.
 156        *
 157        * The problem, as of 2017-05-30:
 158        * When matching a GLXFBConfig to a __DRIconfig, GLX ignores the channel
 159        * order and chooses the first __DRIconfig with the expected channel
 160        * sizes. Specifically, GLX compares the GLXFBConfig's and __DRIconfig's
 161        * __DRI_ATTRIB_{CHANNEL}_SIZE but ignores __DRI_ATTRIB_{CHANNEL}_MASK.
 162        *
 163        * EGL does not suffer from this problem. It correctly compares the
 164        * channel masks when matching EGLConfig to __DRIconfig.
 165        */
 166
 167       /* Required by Android, for HAL_PIXEL_FORMAT_RGBA_8888. */
 168       MESA_FORMAT_R8G8B8A8_UNORM,
 169
 170       /* Required by Android, for HAL_PIXEL_FORMAT_RGBX_8888. */
 171       MESA_FORMAT_R8G8B8X8_UNORM,
 172    };
 173    static const enum pipe_format pipe_formats[] = {
 174       PIPE_FORMAT_BGRA8888_UNORM,
 175       PIPE_FORMAT_BGRX8888_UNORM,
 176       PIPE_FORMAT_BGRA8888_SRGB,
 177       PIPE_FORMAT_BGRX8888_SRGB,
 178       PIPE_FORMAT_B5G6R5_UNORM,
 179       PIPE_FORMAT_RGBA8888_UNORM,
 180       PIPE_FORMAT_RGBX8888_UNORM,
 181    };
 182    mesa_format format;
 183    __DRIconfig **configs = NULL;
 184    uint8_t depth_bits_array[5];
 185    uint8_t stencil_bits_array[5];
 186    unsigned depth_buffer_factor;
 187    unsigned msaa_samples_max;
 188    unsigned i;
 189    struct pipe_screen *p_screen = screen->base.screen;
 190    boolean pf_z16, pf_x8z24, pf_z24x8, pf_s8z24, pf_z24s8, pf_z32;
 191    boolean mixed_color_depth;
 192
 193    static const GLenum back_buffer_modes[] = {
 194       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 195    };
 196
 197    if (driQueryOptionb(&screen->optionCache, "always_have_depth_buffer")) {
 198       /* all visuals will have a depth buffer */
 199       depth_buffer_factor = 0;
 200    }
 201    else {
 202       depth_bits_array[0] = 0;
 203       stencil_bits_array[0] = 0;
 204       depth_buffer_factor = 1;
 205    }
 206
 207    msaa_samples_max = (screen->st_api->feature_mask & ST_API_FEATURE_MS_VISUALS_MASK)
 208       ? MSAA_VISUAL_MAX_SAMPLES : 1;
 209
 210    pf_x8z24 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z24X8_UNORM,
 211                                             PIPE_TEXTURE_2D, 0,
 212                                             PIPE_BIND_DEPTH_STENCIL);
 213    pf_z24x8 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_X8Z24_UNORM,
 214                                             PIPE_TEXTURE_2D, 0,
 215                                             PIPE_BIND_DEPTH_STENCIL);
 216    pf_s8z24 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z24_UNORM_S8_UINT,
 217                                             PIPE_TEXTURE_2D, 0,
 218                                             PIPE_BIND_DEPTH_STENCIL);
 219    pf_z24s8 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_S8_UINT_Z24_UNORM,
 220                                             PIPE_TEXTURE_2D, 0,
 221                                             PIPE_BIND_DEPTH_STENCIL);
 222    pf_z16 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z16_UNORM,
 223                                           PIPE_TEXTURE_2D, 0,
 224                                           PIPE_BIND_DEPTH_STENCIL);
 225    pf_z32 = p_screen->is_format_supported(p_screen, PIPE_FORMAT_Z32_UNORM,
 226                                           PIPE_TEXTURE_2D, 0,
 227                                           PIPE_BIND_DEPTH_STENCIL);
 228
 229    if (pf_z16) {
 230       depth_bits_array[depth_buffer_factor] = 16;
 231       stencil_bits_array[depth_buffer_factor++] = 0;
 232    }
 233    if (pf_x8z24 || pf_z24x8) {
 234       depth_bits_array[depth_buffer_factor] = 24;
 235       stencil_bits_array[depth_buffer_factor++] = 0;
 236       screen->d_depth_bits_last = pf_x8z24;
 237    }
 238    if (pf_s8z24 || pf_z24s8) {
 239       depth_bits_array[depth_buffer_factor] = 24;
 240       stencil_bits_array[depth_buffer_factor++] = 8;
 241       screen->sd_depth_bits_last = pf_s8z24;
 242    }
 243    if (pf_z32) {
 244       depth_bits_array[depth_buffer_factor] = 32;
 245       stencil_bits_array[depth_buffer_factor++] = 0;
 246    }
 247
 248    mixed_color_depth =
 249       p_screen->get_param(p_screen, PIPE_CAP_MIXED_COLOR_DEPTH_BITS);
 250
 251    assert(ARRAY_SIZE(mesa_formats) == ARRAY_SIZE(pipe_formats));
 252
 253    /* Expose only BGRA ordering if the loader doesn't support RGBA ordering. */
 254    unsigned num_formats;
 255    if (dri_loader_get_cap(screen, DRI_LOADER_CAP_RGBA_ORDERING))
 256       num_formats = ARRAY_SIZE(mesa_formats);
 257    else
 258       num_formats = 5;
 259
 260    /* Add configs. */
 261    for (format = 0; format < num_formats; format++) {
 262       __DRIconfig **new_configs = NULL;
 263       unsigned num_msaa_modes = 0; /* includes a single-sample mode */
 264       uint8_t msaa_modes[MSAA_VISUAL_MAX_SAMPLES];
 265
 266       if (!p_screen->is_format_supported(p_screen, pipe_formats[format],
 267                                          PIPE_TEXTURE_2D, 0,
 268                                          PIPE_BIND_RENDER_TARGET))
 269          continue;
 270
 271       for (i = 1; i <= msaa_samples_max; i++) {
 272          int samples = i > 1 ? i : 0;
 273
 274          if (p_screen->is_format_supported(p_screen, pipe_formats[format],
 275                                            PIPE_TEXTURE_2D, samples,
 276                                            PIPE_BIND_RENDER_TARGET)) {
 277             msaa_modes[num_msaa_modes++] = samples;
 278          }
 279       }
 280
 281       if (num_msaa_modes) {
 282          /* Single-sample configs with an accumulation buffer. */
 283          new_configs = driCreateConfigs(mesa_formats[format],
 284                                         depth_bits_array, stencil_bits_array,
 285                                         depth_buffer_factor, back_buffer_modes,
 286                                         ARRAY_SIZE(back_buffer_modes),
 287                                         msaa_modes, 1,
 288                                         GL_TRUE, !mixed_color_depth);
 289          configs = driConcatConfigs(configs, new_configs);
 290
 291          /* Multi-sample configs without an accumulation buffer. */
 292          if (num_msaa_modes > 1) {
 293             new_configs = driCreateConfigs(mesa_formats[format],
 294                                            depth_bits_array, stencil_bits_array,
 295                                            depth_buffer_factor, back_buffer_modes,
 296                                            ARRAY_SIZE(back_buffer_modes),
 297                                            msaa_modes+1, num_msaa_modes-1,
 298                                            GL_FALSE, !mixed_color_depth);
 299             configs = driConcatConfigs(configs, new_configs);
 300          }
 301       }
 302    }
 303
 304    if (configs == NULL) {
 305       debug_printf("%s: driCreateConfigs failed\n", __FUNCTION__);
 306       return NULL;
 307    }
 308
 309    return (const __DRIconfig **)configs;
 310 }
 311
 312 /**
 313  * Roughly the converse of dri_fill_in_modes.
 314  */
 315 void
 316 dri_fill_st_visual(struct st_visual *stvis, struct dri_screen *screen,
 317                    const struct gl_config *mode)
 318 {
 319    memset(stvis, 0, sizeof(*stvis));
 320
 321    if (!mode)
 322       return;
 323
 324    /* Deduce the color format. */
 325    switch (mode->redMask) {
 326    case 0x00FF0000:
 327       if (mode->alphaMask) {
 328          assert(mode->alphaMask == 0xFF000000);
 329          stvis->color_format = mode->sRGBCapable ?
 330                                   PIPE_FORMAT_BGRA8888_SRGB :
 331                                   PIPE_FORMAT_BGRA8888_UNORM;
 332       } else {
 333          stvis->color_format = mode->sRGBCapable ?
 334                                   PIPE_FORMAT_BGRX8888_SRGB :
 335                                   PIPE_FORMAT_BGRX8888_UNORM;
 336       }
 337       break;
 338
 339    case 0x000000FF:
 340       if (mode->alphaMask) {
 341          assert(mode->alphaMask == 0xFF000000);
 342          stvis->color_format = mode->sRGBCapable ?
 343                                   PIPE_FORMAT_RGBA8888_SRGB :
 344                                   PIPE_FORMAT_RGBA8888_UNORM;
 345       } else {
 346          stvis->color_format = mode->sRGBCapable ?
 347                                   PIPE_FORMAT_RGBX8888_SRGB :
 348                                   PIPE_FORMAT_RGBX8888_UNORM;
 349       }
 350       break;
 351
 352    case 0x0000F800:
 353       stvis->color_format = PIPE_FORMAT_B5G6R5_UNORM;
 354       break;
 355
 356    default:
 357       assert(!"unsupported visual: invalid red mask");
 358       return;
 359    }
 360
 361    if (mode->sampleBuffers) {
 362       stvis->samples = mode->samples;
 363    }
 364
 365    switch (mode->depthBits) {
 366    default:
 367    case 0:
 368       stvis->depth_stencil_format = PIPE_FORMAT_NONE;
 369       break;
 370    case 16:
 371       stvis->depth_stencil_format = PIPE_FORMAT_Z16_UNORM;
 372       break;
 373    case 24:
 374       if (mode->stencilBits == 0) {
 375          stvis->depth_stencil_format = (screen->d_depth_bits_last) ?
 376                                           PIPE_FORMAT_Z24X8_UNORM:
 377                                           PIPE_FORMAT_X8Z24_UNORM;
 378       } else {
 379          stvis->depth_stencil_format = (screen->sd_depth_bits_last) ?
 380                                           PIPE_FORMAT_Z24_UNORM_S8_UINT:
 381                                           PIPE_FORMAT_S8_UINT_Z24_UNORM;
 382       }
 383       break;
 384    case 32:
 385       stvis->depth_stencil_format = PIPE_FORMAT_Z32_UNORM;
 386       break;
 387    }
 388
 389    stvis->accum_format = (mode->haveAccumBuffer) ?
 390       PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
 391
 392    stvis->buffer_mask |= ST_ATTACHMENT_FRONT_LEFT_MASK;
 393    stvis->render_buffer = ST_ATTACHMENT_FRONT_LEFT;
 394    if (mode->doubleBufferMode) {
 395       stvis->buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
 396       stvis->render_buffer = ST_ATTACHMENT_BACK_LEFT;
 397    }
 398    if (mode->stereoMode) {
 399       stvis->buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
 400       if (mode->doubleBufferMode)
 401          stvis->buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
 402    }
 403
 404    if (mode->haveDepthBuffer || mode->haveStencilBuffer)
 405       stvis->buffer_mask |= ST_ATTACHMENT_DEPTH_STENCIL_MASK;
 406    /* let the state tracker allocate the accum buffer */
 407 }
 408
 409 static boolean
 410 dri_get_egl_image(struct st_manager *smapi,
 411                   void *egl_image,
 412                   struct st_egl_image *stimg)
 413 {
 414    struct dri_screen *screen = (struct dri_screen *)smapi;
 415    __DRIimage *img = NULL;
 416
 417    if (screen->lookup_egl_image) {
 418       img = screen->lookup_egl_image(screen, egl_image);
 419    }
 420
 421    if (!img)
 422       return FALSE;
 423
 424    stimg->texture = NULL;
 425    pipe_resource_reference(&stimg->texture, img->texture);
 426    switch (img->dri_components) {
 427    case __DRI_IMAGE_COMPONENTS_Y_U_V:
 428       stimg->format = PIPE_FORMAT_IYUV;
 429       break;
 430    case __DRI_IMAGE_COMPONENTS_Y_UV:
 431       stimg->format = PIPE_FORMAT_NV12;
 432       break;
 433    default:
 434       stimg->format = img->texture->format;
 435       break;
 436    }
 437    stimg->level = img->level;
 438    stimg->layer = img->layer;
 439
 440    return TRUE;
 441 }
 442
 443 static int
 444 dri_get_param(struct st_manager *smapi,
 445               enum st_manager_param param)
 446 {
 447    struct dri_screen *screen = (struct dri_screen *)smapi;
 448
 449    switch(param) {
 450    case ST_MANAGER_BROKEN_INVALIDATE:
 451       return screen->broken_invalidate;
 452    default:
 453       return 0;
 454    }
 455 }
 456
 457 static void
 458 dri_destroy_option_cache(struct dri_screen * screen)
 459 {
 460    int i;
 461
 462    if (screen->optionCache.info) {
 463       for (i = 0; i < (1 << screen->optionCache.tableSize); ++i) {
 464          free(screen->optionCache.info[i].name);
 465          free(screen->optionCache.info[i].ranges);
 466       }
 467       free(screen->optionCache.info);
 468    }
 469
 470    free(screen->optionCache.values);
 471
 472    /* Default values are copied to screen->optionCache->values in
 473     * initOptionCache. The info field, however, is a pointer copy, so don't free
 474     * that twice.
 475     */
 476    free(screen->optionCacheDefaults.values);
 477 }
 478
 479 void
 480 dri_destroy_screen_helper(struct dri_screen * screen)
 481 {
 482    if (screen->base.destroy)
 483       screen->base.destroy(&screen->base);
 484
 485    if (screen->st_api && screen->st_api->destroy)
 486       screen->st_api->destroy(screen->st_api);
 487
 488    if (screen->base.screen)
 489       screen->base.screen->destroy(screen->base.screen);
 490
 491    dri_destroy_option_cache(screen);
 492    mtx_destroy(&screen->opencl_func_mutex);
 493 }
 494
 495 void
 496 dri_destroy_screen(__DRIscreen * sPriv)
 497 {
 498    struct dri_screen *screen = dri_screen(sPriv);
 499
 500    dri_destroy_screen_helper(screen);
 501
 502    pipe_loader_release(&screen->dev, 1);
 503
 504    free(screen);
 505    sPriv->driverPrivate = NULL;
 506    sPriv->extensions = NULL;
 507 }
 508
 509 static void
 510 dri_postprocessing_init(struct dri_screen *screen)
 511 {
 512    unsigned i;
 513
 514    for (i = 0; i < PP_FILTERS; i++) {
 515       screen->pp_enabled[i] = driQueryOptioni(&screen->optionCache,
 516                                               pp_filters[i].name);
 517    }
 518 }
 519
 520 static void
 521 dri_set_background_context(struct st_context_iface *st,
 522                            struct util_queue_monitoring *queue_info)
 523 {
 524    struct dri_context *ctx = (struct dri_context *)st->st_manager_private;
 525    const __DRIbackgroundCallableExtension *backgroundCallable =
 526       ctx->sPriv->dri2.backgroundCallable;
 527
 528    /* Note: Mesa will only call this function if GL multithreading is enabled
 529     * We only do that if the loader exposed the __DRI_BACKGROUND_CALLABLE
 530     * extension. So we know that backgroundCallable is not NULL.
 531     */
 532    assert(backgroundCallable);
 533    backgroundCallable->setBackgroundContext(ctx->cPriv->loaderPrivate);
 534
 535    if (ctx->hud)
 536       hud_add_queue_for_monitoring(ctx->hud, queue_info);
 537 }
 538
 539 unsigned
 540 dri_init_options_get_screen_flags(struct dri_screen *screen,
 541                                   const char* driver_name)
 542 {
 543    unsigned flags = 0;
 544
 545    driParseOptionInfo(&screen->optionCacheDefaults, gallium_config_options.xml);
 546    driParseConfigFiles(&screen->optionCache,
 547                        &screen->optionCacheDefaults,
 548                        screen->sPriv->myNum,
 549                        driver_name);
 550    dri_fill_st_options(screen);
 551
 552    if (driQueryOptionb(&screen->optionCache,
 553                        "glsl_correct_derivatives_after_discard"))
 554       flags |= PIPE_SCREEN_ENABLE_CORRECT_TGSI_DERIVATIVES_AFTER_KILL;
 555
 556    return flags;
 557 }
 558
 559 const __DRIconfig **
 560 dri_init_screen_helper(struct dri_screen *screen,
 561                        struct pipe_screen *pscreen)
 562 {
 563    screen->base.screen = pscreen;
 564    screen->base.get_egl_image = dri_get_egl_image;
 565    screen->base.get_param = dri_get_param;
 566    screen->base.set_background_context = dri_set_background_context;
 567
 568    screen->st_api = st_gl_api_create();
 569    if (!screen->st_api)
 570       return NULL;
 571
 572    if(pscreen->get_param(pscreen, PIPE_CAP_NPOT_TEXTURES))
 573       screen->target = PIPE_TEXTURE_2D;
 574    else
 575       screen->target = PIPE_TEXTURE_RECT;
 576
 577    /* Handle force_s3tc_enable. */
 578    if (!util_format_s3tc_enabled && screen->options.force_s3tc_enable) {
 579       /* Ensure libtxc_dxtn has been loaded if available.
 580        * Forcing S3TC on before calling this would prevent loading
 581        * the library.
 582        * This is just a precaution, the driver should have called it
 583        * already.
 584        */
 585       util_format_s3tc_init();
 586
 587       util_format_s3tc_enabled = TRUE;
 588    }
 589
 590    dri_postprocessing_init(screen);
 591
 592    screen->st_api->query_versions(screen->st_api, &screen->base,
 593                                   &screen->options,
 594                                   &screen->sPriv->max_gl_core_version,
 595                                   &screen->sPriv->max_gl_compat_version,
 596                                   &screen->sPriv->max_gl_es1_version,
 597                                   &screen->sPriv->max_gl_es2_version);
 598
 599    return dri_fill_in_modes(screen);
 600 }
 601
 602 /* vim: set sw=3 ts=8 sts=3 expandtab: */