src/mesa/drivers/dri/intel/intel_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 #include "main/glheader.h"
  29 #include "main/context.h"
  30 #include "main/framebuffer.h"
  31 #include "main/renderbuffer.h"
  32 #include "main/hash.h"
  33 #include "main/fbobject.h"
  34
  35 #include "utils.h"
  36 #include "xmlpool.h"
  37
  38 PUBLIC const char __driConfigOptions[] =
  39    DRI_CONF_BEGIN
  40    DRI_CONF_SECTION_PERFORMANCE
  41       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  42       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  43        * DRI_CONF_BO_REUSE_ALL
  44        */
  45       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  46          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  47             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  48             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  49          DRI_CONF_DESC_END
  50       DRI_CONF_OPT_END
  51
  52       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  53          DRI_CONF_DESC(en, "Enable texture tiling")
  54       DRI_CONF_OPT_END
  55
  56       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  57          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  58       DRI_CONF_OPT_END
  59
  60       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  61          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  62       DRI_CONF_OPT_END
  63
  64    DRI_CONF_SECTION_END
  65    DRI_CONF_SECTION_QUALITY
  66       DRI_CONF_FORCE_S3TC_ENABLE(false)
  67       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  68    DRI_CONF_SECTION_END
  69    DRI_CONF_SECTION_DEBUG
  70      DRI_CONF_NO_RAST(false)
  71      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  72      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  73
  74       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  75          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  76       DRI_CONF_OPT_END
  77    DRI_CONF_SECTION_END
  78 DRI_CONF_END;
  79
  80 const GLuint __driNConfigOptions = 11;
  81
  82 #include "intel_batchbuffer.h"
  83 #include "intel_buffers.h"
  84 #include "intel_bufmgr.h"
  85 #include "intel_chipset.h"
  86 #include "intel_fbo.h"
  87 #include "intel_screen.h"
  88 #include "intel_tex.h"
  89 #include "intel_regions.h"
  90
  91 #include "i915_drm.h"
  92
  93 #ifdef USE_NEW_INTERFACE
  94 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  95 #endif /*USE_NEW_INTERFACE */
  96
  97 static const __DRItexBufferExtension intelTexBufferExtension = {
  98     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
  99    intelSetTexBuffer,
 100    intelSetTexBuffer2,
 101 };
 102
 103 static void
 104 intelDRI2Flush(__DRIdrawable *drawable)
 105 {
 106    struct intel_context *intel = drawable->driContextPriv->driverPrivate;
 107
 108    if (intel->gen < 4)
 109       INTEL_FIREVERTICES(intel);
 110
 111    intel->need_throttle = GL_TRUE;
 112
 113    if (intel->batch->map != intel->batch->ptr)
 114       intel_batchbuffer_flush(intel->batch);
 115 }
 116
 117 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 118     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 119     intelDRI2Flush,
 120     dri2InvalidateDrawable,
 121 };
 122
 123 static __DRIimage *
 124 intel_create_image_from_name(__DRIscreen *screen,
 125                              int width, int height, int format,
 126                              int name, int pitch, void *loaderPrivate)
 127 {
 128     struct intel_screen *intelScreen = screen->private;
 129     __DRIimage *image;
 130     int cpp;
 131
 132     image = CALLOC(sizeof *image);
 133     if (image == NULL)
 134         return NULL;
 135
 136     switch (format) {
 137     case __DRI_IMAGE_FORMAT_RGB565:
 138        image->format = MESA_FORMAT_RGB565;
 139        image->internal_format = GL_RGB;
 140        image->data_type = GL_UNSIGNED_BYTE;
 141        break;
 142     case __DRI_IMAGE_FORMAT_XRGB8888:
 143        image->format = MESA_FORMAT_XRGB8888;
 144        image->internal_format = GL_RGB;
 145        image->data_type = GL_UNSIGNED_BYTE;
 146        break;
 147     case __DRI_IMAGE_FORMAT_ARGB8888:
 148        image->format = MESA_FORMAT_ARGB8888;
 149        image->internal_format = GL_RGBA;
 150        image->data_type = GL_UNSIGNED_BYTE;
 151        break;
 152     default:
 153        free(image);
 154        return NULL;
 155     }
 156
 157     image->data = loaderPrivate;
 158     cpp = _mesa_get_format_bytes(image->format);
 159
 160     image->region = intel_region_alloc_for_handle(intelScreen,
 161                                                   cpp, width, height,
 162                                                   pitch, name, "image");
 163     if (image->region == NULL) {
 164        FREE(image);
 165        return NULL;
 166     }
 167
 168     return image;
 169 }
 170
 171 static __DRIimage *
 172 intel_create_image_from_renderbuffer(__DRIcontext *context,
 173                                      int renderbuffer, void *loaderPrivate)
 174 {
 175    __DRIimage *image;
 176    struct intel_context *intel = context->driverPrivate;
 177    struct gl_renderbuffer *rb;
 178    struct intel_renderbuffer *irb;
 179
 180    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 181    if (!rb) {
 182       _mesa_error(&intel->ctx,
 183                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 184       return NULL;
 185    }
 186
 187    irb = intel_renderbuffer(rb);
 188    image = CALLOC(sizeof *image);
 189    if (image == NULL)
 190       return NULL;
 191
 192    image->internal_format = rb->InternalFormat;
 193    image->format = rb->Format;
 194    image->data_type = rb->DataType;
 195    image->data = loaderPrivate;
 196    intel_region_reference(&image->region, irb->region);
 197
 198    return image;
 199 }
 200
 201 static void
 202 intel_destroy_image(__DRIimage *image)
 203 {
 204     intel_region_release(&image->region);
 205     FREE(image);
 206 }
 207
 208 static __DRIimage *
 209 intel_create_image(__DRIscreen *screen,
 210                    int width, int height, int format,
 211                    unsigned int use,
 212                    void *loaderPrivate)
 213 {
 214    __DRIimage *image;
 215    struct intel_screen *intelScreen = screen->private;
 216    int cpp;
 217
 218    image = CALLOC(sizeof *image);
 219    if (image == NULL)
 220       return NULL;
 221
 222    switch (format) {
 223    case __DRI_IMAGE_FORMAT_RGB565:
 224       image->format = MESA_FORMAT_RGB565;
 225       image->internal_format = GL_RGB;
 226       image->data_type = GL_UNSIGNED_BYTE;
 227       break;
 228    case __DRI_IMAGE_FORMAT_XRGB8888:
 229       image->format = MESA_FORMAT_XRGB8888;
 230       image->internal_format = GL_RGB;
 231       image->data_type = GL_UNSIGNED_BYTE;
 232       break;
 233    case __DRI_IMAGE_FORMAT_ARGB8888:
 234       image->format = MESA_FORMAT_ARGB8888;
 235       image->internal_format = GL_RGBA;
 236       image->data_type = GL_UNSIGNED_BYTE;
 237       break;
 238    default:
 239       free(image);
 240       return NULL;
 241    }
 242
 243    image->data = loaderPrivate;
 244    cpp = _mesa_get_format_bytes(image->format);
 245
 246    image->region =
 247       intel_region_alloc(intelScreen, I915_TILING_NONE,
 248                          cpp, width, height, GL_TRUE);
 249    if (image->region == NULL) {
 250       FREE(image);
 251       return NULL;
 252    }
 253
 254    return image;
 255 }
 256
 257 static GLboolean
 258 intel_query_image(__DRIimage *image, int attrib, int *value)
 259 {
 260    switch (attrib) {
 261    case __DRI_IMAGE_ATTRIB_STRIDE:
 262       *value = image->region->pitch * image->region->cpp;
 263       return GL_TRUE;
 264    case __DRI_IMAGE_ATTRIB_HANDLE:
 265       *value = image->region->buffer->handle;
 266       return GL_TRUE;
 267    case __DRI_IMAGE_ATTRIB_NAME:
 268       return intel_region_flink(image->region, (uint32_t *) value);
 269    default:
 270       return GL_FALSE;
 271    }
 272 }
 273
 274 static struct __DRIimageExtensionRec intelImageExtension = {
 275     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 276     intel_create_image_from_name,
 277     intel_create_image_from_renderbuffer,
 278     intel_destroy_image,
 279     intel_create_image,
 280     intel_query_image
 281 };
 282
 283 static const __DRIextension *intelScreenExtensions[] = {
 284     &driReadDrawableExtension,
 285     &intelTexBufferExtension.base,
 286     &intelFlushExtension.base,
 287     &intelImageExtension.base,
 288     &dri2ConfigQueryExtension.base,
 289     NULL
 290 };
 291
 292 static GLboolean
 293 intel_get_param(__DRIscreen *psp, int param, int *value)
 294 {
 295    int ret;
 296    struct drm_i915_getparam gp;
 297
 298    gp.param = param;
 299    gp.value = value;
 300
 301    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 302    if (ret) {
 303       _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 304       return GL_FALSE;
 305    }
 306
 307    return GL_TRUE;
 308 }
 309
 310 static void
 311 nop_callback(GLuint key, void *data, void *userData)
 312 {
 313 }
 314
 315 static void
 316 intelDestroyScreen(__DRIscreen * sPriv)
 317 {
 318    struct intel_screen *intelScreen = sPriv->private;
 319
 320    dri_bufmgr_destroy(intelScreen->bufmgr);
 321    driDestroyOptionInfo(&intelScreen->optionCache);
 322
 323    /* Some regions may still have references to them at this point, so
 324     * flush the hash table to prevent _mesa_DeleteHashTable() from
 325     * complaining about the hash not being empty; */
 326    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 327    _mesa_DeleteHashTable(intelScreen->named_regions);
 328
 329    FREE(intelScreen);
 330    sPriv->private = NULL;
 331 }
 332
 333
 334 /**
 335  * This is called when we need to set up GL rendering to a new X window.
 336  */
 337 static GLboolean
 338 intelCreateBuffer(__DRIscreen * driScrnPriv,
 339                   __DRIdrawable * driDrawPriv,
 340                   const struct gl_config * mesaVis, GLboolean isPixmap)
 341 {
 342    struct intel_renderbuffer *rb;
 343
 344    if (isPixmap) {
 345       return GL_FALSE;          /* not implemented */
 346    }
 347    else {
 348       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 349                              mesaVis->depthBits != 24);
 350       gl_format rgbFormat;
 351
 352       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 353
 354       if (!fb)
 355          return GL_FALSE;
 356
 357       _mesa_initialize_window_framebuffer(fb, mesaVis);
 358
 359       if (mesaVis->redBits == 5)
 360          rgbFormat = MESA_FORMAT_RGB565;
 361       else if (mesaVis->alphaBits == 0)
 362          rgbFormat = MESA_FORMAT_XRGB8888;
 363       else
 364          rgbFormat = MESA_FORMAT_ARGB8888;
 365
 366       /* setup the hardware-based renderbuffers */
 367       rb = intel_create_renderbuffer(rgbFormat);
 368       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 369
 370       if (mesaVis->doubleBufferMode) {
 371          rb = intel_create_renderbuffer(rgbFormat);
 372          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 373       }
 374
 375       if (mesaVis->depthBits == 24) {
 376          assert(mesaVis->stencilBits == 8);
 377          /* combined depth/stencil buffer */
 378          struct intel_renderbuffer *depthStencilRb
 379             = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 380          /* note: bind RB to two attachment points */
 381          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthStencilRb->Base);
 382          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &depthStencilRb->Base);
 383       }
 384       else if (mesaVis->depthBits == 16) {
 385          /* just 16-bit depth buffer, no hw stencil */
 386          struct intel_renderbuffer *depthRb
 387             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 388          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 389       }
 390
 391       /* now add any/all software-based renderbuffers we may need */
 392       _mesa_add_soft_renderbuffers(fb,
 393                                    GL_FALSE, /* never sw color */
 394                                    GL_FALSE, /* never sw depth */
 395                                    swStencil, mesaVis->accumRedBits > 0,
 396                                    GL_FALSE, /* never sw alpha */
 397                                    GL_FALSE  /* never sw aux */ );
 398       driDrawPriv->driverPrivate = fb;
 399
 400       return GL_TRUE;
 401    }
 402 }
 403
 404 static void
 405 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 406 {
 407     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 408
 409     _mesa_reference_framebuffer(&fb, NULL);
 410 }
 411
 412 /* There are probably better ways to do this, such as an
 413  * init-designated function to register chipids and createcontext
 414  * functions.
 415  */
 416 extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
 417                                    __DRIcontext * driContextPriv,
 418                                    void *sharedContextPrivate);
 419
 420 extern GLboolean i915CreateContext(int api,
 421                                    const struct gl_config * mesaVis,
 422                                    __DRIcontext * driContextPriv,
 423                                    void *sharedContextPrivate);
 424 extern GLboolean brwCreateContext(int api,
 425                                   const struct gl_config * mesaVis,
 426                                   __DRIcontext * driContextPriv,
 427                                   void *sharedContextPrivate);
 428
 429 static GLboolean
 430 intelCreateContext(gl_api api,
 431                    const struct gl_config * mesaVis,
 432                    __DRIcontext * driContextPriv,
 433                    void *sharedContextPrivate)
 434 {
 435    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 436    struct intel_screen *intelScreen = sPriv->private;
 437
 438 #ifdef I915
 439    if (IS_9XX(intelScreen->deviceID)) {
 440       if (!IS_965(intelScreen->deviceID)) {
 441          return i915CreateContext(api, mesaVis, driContextPriv,
 442                                   sharedContextPrivate);
 443       }
 444    } else {
 445       intelScreen->no_vbo = GL_TRUE;
 446       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 447    }
 448 #else
 449    if (IS_965(intelScreen->deviceID))
 450       return brwCreateContext(api, mesaVis,
 451                               driContextPriv, sharedContextPrivate);
 452 #endif
 453    fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 454    return GL_FALSE;
 455 }
 456
 457 static GLboolean
 458 intel_init_bufmgr(struct intel_screen *intelScreen)
 459 {
 460    __DRIscreen *spriv = intelScreen->driScrnPriv;
 461    int num_fences = 0;
 462
 463    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 464                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 465
 466    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 467    if (intelScreen->bufmgr == NULL) {
 468       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 469               __func__, __LINE__);
 470       return GL_FALSE;
 471    }
 472
 473    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 474        num_fences == 0) {
 475       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 476       return GL_FALSE;
 477    }
 478
 479    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 480
 481    intelScreen->named_regions = _mesa_NewHashTable();
 482
 483    return GL_TRUE;
 484 }
 485
 486 /**
 487  * This is the driver specific part of the createNewScreen entry point.
 488  * Called when using DRI2.
 489  *
 490  * \return the struct gl_config supported by this driver
 491  */
 492 static const
 493 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 494 {
 495    struct intel_screen *intelScreen;
 496    GLenum fb_format[3];
 497    GLenum fb_type[3];
 498    unsigned int api_mask;
 499    char *devid_override;
 500
 501    static const GLenum back_buffer_modes[] = {
 502        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 503    };
 504    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 505    int color;
 506    __DRIconfig **configs = NULL;
 507
 508    /* Allocate the private area */
 509    intelScreen = CALLOC(sizeof *intelScreen);
 510    if (!intelScreen) {
 511       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 512       return GL_FALSE;
 513    }
 514    /* parse information in __driConfigOptions */
 515    driParseOptionInfo(&intelScreen->optionCache,
 516                       __driConfigOptions, __driNConfigOptions);
 517
 518    intelScreen->driScrnPriv = psp;
 519    psp->private = (void *) intelScreen;
 520
 521    /* Determine chipset ID */
 522    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 523                         &intelScreen->deviceID))
 524       return GL_FALSE;
 525
 526    /* Allow an override of the device ID for the purpose of making the
 527     * driver produce dumps for debugging of new chipset enablement.
 528     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 529     * incorrectly.
 530     */
 531    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 532    if (devid_override) {
 533       intelScreen->deviceID = strtod(devid_override, NULL);
 534    }
 535
 536    api_mask = (1 << __DRI_API_OPENGL);
 537 #if FEATURE_ES1
 538    api_mask |= (1 << __DRI_API_GLES);
 539 #endif
 540 #if FEATURE_ES2
 541    api_mask |= (1 << __DRI_API_GLES2);
 542 #endif
 543
 544    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 545       psp->api_mask = api_mask;
 546
 547    if (!intel_init_bufmgr(intelScreen))
 548        return GL_FALSE;
 549
 550    psp->extensions = intelScreenExtensions;
 551
 552    msaa_samples_array[0] = 0;
 553
 554    fb_format[0] = GL_RGB;
 555    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 556
 557    fb_format[1] = GL_BGR;
 558    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 559
 560    fb_format[2] = GL_BGRA;
 561    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 562
 563    depth_bits[0] = 0;
 564    stencil_bits[0] = 0;
 565
 566    /* Generate a rich set of useful configs that do not include an
 567     * accumulation buffer.
 568     */
 569    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 570       __DRIconfig **new_configs;
 571       int depth_factor;
 572
 573       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 574        * buffer that has a diffferent number of bits per pixel than the color
 575        * buffer.  This isn't yet supported here.
 576        */
 577       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 578          depth_bits[1] = 16;
 579          stencil_bits[1] = 0;
 580       } else {
 581          depth_bits[1] = 24;
 582          stencil_bits[1] = 8;
 583       }
 584
 585       depth_factor = 2;
 586
 587       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 588                                      depth_bits,
 589                                      stencil_bits,
 590                                      depth_factor,
 591                                      back_buffer_modes,
 592                                      ARRAY_SIZE(back_buffer_modes),
 593                                      msaa_samples_array,
 594                                      ARRAY_SIZE(msaa_samples_array),
 595                                      GL_FALSE);
 596       if (configs == NULL)
 597          configs = new_configs;
 598       else
 599          configs = driConcatConfigs(configs, new_configs);
 600    }
 601
 602    /* Generate the minimum possible set of configs that include an
 603     * accumulation buffer.
 604     */
 605    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 606       __DRIconfig **new_configs;
 607
 608       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 609          depth_bits[0] = 16;
 610          stencil_bits[0] = 0;
 611       } else {
 612          depth_bits[0] = 24;
 613          stencil_bits[0] = 8;
 614       }
 615
 616       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 617                                      depth_bits, stencil_bits, 1,
 618                                      back_buffer_modes + 1, 1,
 619                                      msaa_samples_array, 1,
 620                                      GL_TRUE);
 621       if (configs == NULL)
 622          configs = new_configs;
 623       else
 624          configs = driConcatConfigs(configs, new_configs);
 625    }
 626
 627    if (configs == NULL) {
 628       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 629               __LINE__);
 630       return NULL;
 631    }
 632
 633    return (const __DRIconfig **)configs;
 634 }
 635
 636 const struct __DriverAPIRec driDriverAPI = {
 637    .DestroyScreen        = intelDestroyScreen,
 638    .CreateContext        = intelCreateContext,
 639    .DestroyContext       = intelDestroyContext,
 640    .CreateBuffer         = intelCreateBuffer,
 641    .DestroyBuffer        = intelDestroyBuffer,
 642    .MakeCurrent          = intelMakeCurrent,
 643    .UnbindContext        = intelUnbindContext,
 644    .InitScreen2          = intelInitScreen2,
 645 };
 646
 647 /* This is the table of extensions that the loader will dlsym() for. */
 648 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 649     &driCoreExtension.base,
 650     &driDRI2Extension.base,
 651     NULL
 652 };