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 #include "main/mfeatures.h"
  35
  36 #include "utils.h"
  37 #include "xmlpool.h"
  38
  39 PUBLIC const char __driConfigOptions[] =
  40    DRI_CONF_BEGIN
  41    DRI_CONF_SECTION_PERFORMANCE
  42       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  43       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  44        * DRI_CONF_BO_REUSE_ALL
  45        */
  46       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  47          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  48             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  49             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  50          DRI_CONF_DESC_END
  51       DRI_CONF_OPT_END
  52
  53       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  54          DRI_CONF_DESC(en, "Enable texture tiling")
  55       DRI_CONF_OPT_END
  56
  57       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  58          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  59       DRI_CONF_OPT_END
  60
  61       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  62          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  63       DRI_CONF_OPT_END
  64
  65    DRI_CONF_SECTION_END
  66    DRI_CONF_SECTION_QUALITY
  67       DRI_CONF_FORCE_S3TC_ENABLE(false)
  68       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  69    DRI_CONF_SECTION_END
  70    DRI_CONF_SECTION_DEBUG
  71      DRI_CONF_NO_RAST(false)
  72      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  73      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  74
  75       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  76          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  77       DRI_CONF_OPT_END
  78    DRI_CONF_SECTION_END
  79 DRI_CONF_END;
  80
  81 const GLuint __driNConfigOptions = 11;
  82
  83 #include "intel_batchbuffer.h"
  84 #include "intel_buffers.h"
  85 #include "intel_bufmgr.h"
  86 #include "intel_chipset.h"
  87 #include "intel_fbo.h"
  88 #include "intel_screen.h"
  89 #include "intel_tex.h"
  90 #include "intel_regions.h"
  91
  92 #include "i915_drm.h"
  93
  94 #ifdef USE_NEW_INTERFACE
  95 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  96 #endif /*USE_NEW_INTERFACE */
  97
  98 static const __DRItexBufferExtension intelTexBufferExtension = {
  99     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 100    intelSetTexBuffer,
 101    intelSetTexBuffer2,
 102 };
 103
 104 static void
 105 intelDRI2Flush(__DRIdrawable *drawable)
 106 {
 107    GET_CURRENT_CONTEXT(ctx);
 108    struct intel_context *intel = intel_context(ctx);
 109
 110    if (intel->gen < 4)
 111       INTEL_FIREVERTICES(intel);
 112
 113    intel->need_throttle = GL_TRUE;
 114
 115    if (intel->batch.used)
 116       intel_batchbuffer_flush(intel);
 117 }
 118
 119 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 120     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 121     intelDRI2Flush,
 122     dri2InvalidateDrawable,
 123 };
 124
 125 static __DRIimage *
 126 intel_create_image_from_name(__DRIscreen *screen,
 127                              int width, int height, int format,
 128                              int name, int pitch, void *loaderPrivate)
 129 {
 130     struct intel_screen *intelScreen = screen->private;
 131     __DRIimage *image;
 132     int cpp;
 133
 134     image = CALLOC(sizeof *image);
 135     if (image == NULL)
 136         return NULL;
 137
 138     switch (format) {
 139     case __DRI_IMAGE_FORMAT_RGB565:
 140        image->format = MESA_FORMAT_RGB565;
 141        image->internal_format = GL_RGB;
 142        image->data_type = GL_UNSIGNED_BYTE;
 143        break;
 144     case __DRI_IMAGE_FORMAT_XRGB8888:
 145        image->format = MESA_FORMAT_XRGB8888;
 146        image->internal_format = GL_RGB;
 147        image->data_type = GL_UNSIGNED_BYTE;
 148        break;
 149     case __DRI_IMAGE_FORMAT_ARGB8888:
 150        image->format = MESA_FORMAT_ARGB8888;
 151        image->internal_format = GL_RGBA;
 152        image->data_type = GL_UNSIGNED_BYTE;
 153        break;
 154     default:
 155        free(image);
 156        return NULL;
 157     }
 158
 159     image->data = loaderPrivate;
 160     cpp = _mesa_get_format_bytes(image->format);
 161
 162     image->region = intel_region_alloc_for_handle(intelScreen,
 163                                                   cpp, width, height,
 164                                                   pitch, name, "image");
 165     if (image->region == NULL) {
 166        FREE(image);
 167        return NULL;
 168     }
 169
 170     return image;
 171 }
 172
 173 static __DRIimage *
 174 intel_create_image_from_renderbuffer(__DRIcontext *context,
 175                                      int renderbuffer, void *loaderPrivate)
 176 {
 177    __DRIimage *image;
 178    struct intel_context *intel = context->driverPrivate;
 179    struct gl_renderbuffer *rb;
 180    struct intel_renderbuffer *irb;
 181
 182    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 183    if (!rb) {
 184       _mesa_error(&intel->ctx,
 185                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 186       return NULL;
 187    }
 188
 189    irb = intel_renderbuffer(rb);
 190    image = CALLOC(sizeof *image);
 191    if (image == NULL)
 192       return NULL;
 193
 194    image->internal_format = rb->InternalFormat;
 195    image->format = rb->Format;
 196    image->data_type = rb->DataType;
 197    image->data = loaderPrivate;
 198    intel_region_reference(&image->region, irb->region);
 199
 200    return image;
 201 }
 202
 203 static void
 204 intel_destroy_image(__DRIimage *image)
 205 {
 206     intel_region_release(&image->region);
 207     FREE(image);
 208 }
 209
 210 static __DRIimage *
 211 intel_create_image(__DRIscreen *screen,
 212                    int width, int height, int format,
 213                    unsigned int use,
 214                    void *loaderPrivate)
 215 {
 216    __DRIimage *image;
 217    struct intel_screen *intelScreen = screen->private;
 218    int cpp;
 219
 220    image = CALLOC(sizeof *image);
 221    if (image == NULL)
 222       return NULL;
 223
 224    switch (format) {
 225    case __DRI_IMAGE_FORMAT_RGB565:
 226       image->format = MESA_FORMAT_RGB565;
 227       image->internal_format = GL_RGB;
 228       image->data_type = GL_UNSIGNED_BYTE;
 229       break;
 230    case __DRI_IMAGE_FORMAT_XRGB8888:
 231       image->format = MESA_FORMAT_XRGB8888;
 232       image->internal_format = GL_RGB;
 233       image->data_type = GL_UNSIGNED_BYTE;
 234       break;
 235    case __DRI_IMAGE_FORMAT_ARGB8888:
 236       image->format = MESA_FORMAT_ARGB8888;
 237       image->internal_format = GL_RGBA;
 238       image->data_type = GL_UNSIGNED_BYTE;
 239       break;
 240    default:
 241       free(image);
 242       return NULL;
 243    }
 244
 245    image->data = loaderPrivate;
 246    cpp = _mesa_get_format_bytes(image->format);
 247
 248    image->region =
 249       intel_region_alloc(intelScreen, I915_TILING_NONE,
 250                          cpp, width, height, GL_TRUE);
 251    if (image->region == NULL) {
 252       FREE(image);
 253       return NULL;
 254    }
 255
 256    return image;
 257 }
 258
 259 static GLboolean
 260 intel_query_image(__DRIimage *image, int attrib, int *value)
 261 {
 262    switch (attrib) {
 263    case __DRI_IMAGE_ATTRIB_STRIDE:
 264       *value = image->region->pitch * image->region->cpp;
 265       return GL_TRUE;
 266    case __DRI_IMAGE_ATTRIB_HANDLE:
 267       *value = image->region->buffer->handle;
 268       return GL_TRUE;
 269    case __DRI_IMAGE_ATTRIB_NAME:
 270       return intel_region_flink(image->region, (uint32_t *) value);
 271    default:
 272       return GL_FALSE;
 273    }
 274 }
 275
 276 static struct __DRIimageExtensionRec intelImageExtension = {
 277     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 278     intel_create_image_from_name,
 279     intel_create_image_from_renderbuffer,
 280     intel_destroy_image,
 281     intel_create_image,
 282     intel_query_image
 283 };
 284
 285 static const __DRIextension *intelScreenExtensions[] = {
 286     &driReadDrawableExtension,
 287     &intelTexBufferExtension.base,
 288     &intelFlushExtension.base,
 289     &intelImageExtension.base,
 290     &dri2ConfigQueryExtension.base,
 291     NULL
 292 };
 293
 294 static GLboolean
 295 intel_get_param(__DRIscreen *psp, int param, int *value)
 296 {
 297    int ret;
 298    struct drm_i915_getparam gp;
 299
 300    gp.param = param;
 301    gp.value = value;
 302
 303    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 304    if (ret) {
 305       _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 306       return GL_FALSE;
 307    }
 308
 309    return GL_TRUE;
 310 }
 311
 312 static GLboolean
 313 intel_get_boolean(__DRIscreen *psp, int param)
 314 {
 315    int value = 0;
 316    return intel_get_param(psp, param, &value) && value;
 317 }
 318
 319 static void
 320 nop_callback(GLuint key, void *data, void *userData)
 321 {
 322 }
 323
 324 static void
 325 intelDestroyScreen(__DRIscreen * sPriv)
 326 {
 327    struct intel_screen *intelScreen = sPriv->private;
 328
 329    dri_bufmgr_destroy(intelScreen->bufmgr);
 330    driDestroyOptionInfo(&intelScreen->optionCache);
 331
 332    /* Some regions may still have references to them at this point, so
 333     * flush the hash table to prevent _mesa_DeleteHashTable() from
 334     * complaining about the hash not being empty; */
 335    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 336    _mesa_DeleteHashTable(intelScreen->named_regions);
 337
 338    FREE(intelScreen);
 339    sPriv->private = NULL;
 340 }
 341
 342
 343 /**
 344  * This is called when we need to set up GL rendering to a new X window.
 345  */
 346 static GLboolean
 347 intelCreateBuffer(__DRIscreen * driScrnPriv,
 348                   __DRIdrawable * driDrawPriv,
 349                   const struct gl_config * mesaVis, GLboolean isPixmap)
 350 {
 351    struct intel_renderbuffer *rb;
 352
 353    if (isPixmap) {
 354       return GL_FALSE;          /* not implemented */
 355    }
 356    else {
 357       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 358                              mesaVis->depthBits != 24);
 359       gl_format rgbFormat;
 360
 361       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 362
 363       if (!fb)
 364          return GL_FALSE;
 365
 366       _mesa_initialize_window_framebuffer(fb, mesaVis);
 367
 368       if (mesaVis->redBits == 5)
 369          rgbFormat = MESA_FORMAT_RGB565;
 370       else if (mesaVis->alphaBits == 0)
 371          rgbFormat = MESA_FORMAT_XRGB8888;
 372       else
 373          rgbFormat = MESA_FORMAT_ARGB8888;
 374
 375       /* setup the hardware-based renderbuffers */
 376       rb = intel_create_renderbuffer(rgbFormat);
 377       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 378
 379       if (mesaVis->doubleBufferMode) {
 380          rb = intel_create_renderbuffer(rgbFormat);
 381          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 382       }
 383
 384       if (mesaVis->depthBits == 24) {
 385          assert(mesaVis->stencilBits == 8);
 386          /* combined depth/stencil buffer */
 387          struct intel_renderbuffer *depthStencilRb
 388             = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 389          /* note: bind RB to two attachment points */
 390          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthStencilRb->Base);
 391          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &depthStencilRb->Base);
 392       }
 393       else if (mesaVis->depthBits == 16) {
 394          /* just 16-bit depth buffer, no hw stencil */
 395          struct intel_renderbuffer *depthRb
 396             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 397          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 398       }
 399
 400       /* now add any/all software-based renderbuffers we may need */
 401       _mesa_add_soft_renderbuffers(fb,
 402                                    GL_FALSE, /* never sw color */
 403                                    GL_FALSE, /* never sw depth */
 404                                    swStencil, mesaVis->accumRedBits > 0,
 405                                    GL_FALSE, /* never sw alpha */
 406                                    GL_FALSE  /* never sw aux */ );
 407       driDrawPriv->driverPrivate = fb;
 408
 409       return GL_TRUE;
 410    }
 411 }
 412
 413 static void
 414 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 415 {
 416     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 417
 418     _mesa_reference_framebuffer(&fb, NULL);
 419 }
 420
 421 /* There are probably better ways to do this, such as an
 422  * init-designated function to register chipids and createcontext
 423  * functions.
 424  */
 425 extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
 426                                    __DRIcontext * driContextPriv,
 427                                    void *sharedContextPrivate);
 428
 429 extern GLboolean i915CreateContext(int api,
 430                                    const struct gl_config * mesaVis,
 431                                    __DRIcontext * driContextPriv,
 432                                    void *sharedContextPrivate);
 433 extern GLboolean brwCreateContext(int api,
 434                                   const struct gl_config * mesaVis,
 435                                   __DRIcontext * driContextPriv,
 436                                   void *sharedContextPrivate);
 437
 438 static GLboolean
 439 intelCreateContext(gl_api api,
 440                    const struct gl_config * mesaVis,
 441                    __DRIcontext * driContextPriv,
 442                    void *sharedContextPrivate)
 443 {
 444    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 445    struct intel_screen *intelScreen = sPriv->private;
 446
 447 #ifdef I915
 448    if (IS_9XX(intelScreen->deviceID)) {
 449       if (!IS_965(intelScreen->deviceID)) {
 450          return i915CreateContext(api, mesaVis, driContextPriv,
 451                                   sharedContextPrivate);
 452       }
 453    } else {
 454       intelScreen->no_vbo = GL_TRUE;
 455       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 456    }
 457 #else
 458    if (IS_965(intelScreen->deviceID))
 459       return brwCreateContext(api, mesaVis,
 460                               driContextPriv, sharedContextPrivate);
 461 #endif
 462    fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 463    return GL_FALSE;
 464 }
 465
 466 static GLboolean
 467 intel_init_bufmgr(struct intel_screen *intelScreen)
 468 {
 469    __DRIscreen *spriv = intelScreen->driScrnPriv;
 470    int num_fences = 0;
 471
 472    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 473                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 474
 475    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 476    if (intelScreen->bufmgr == NULL) {
 477       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 478               __func__, __LINE__);
 479       return GL_FALSE;
 480    }
 481
 482    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 483        num_fences == 0) {
 484       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 485       return GL_FALSE;
 486    }
 487
 488    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 489
 490    intelScreen->named_regions = _mesa_NewHashTable();
 491
 492    intelScreen->relaxed_relocations = 0;
 493    intelScreen->relaxed_relocations |=
 494       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 495
 496    return GL_TRUE;
 497 }
 498
 499 /**
 500  * This is the driver specific part of the createNewScreen entry point.
 501  * Called when using DRI2.
 502  *
 503  * \return the struct gl_config supported by this driver
 504  */
 505 static const
 506 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 507 {
 508    struct intel_screen *intelScreen;
 509    GLenum fb_format[3];
 510    GLenum fb_type[3];
 511    unsigned int api_mask;
 512    char *devid_override;
 513
 514    static const GLenum back_buffer_modes[] = {
 515        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 516    };
 517    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 518    int color;
 519    __DRIconfig **configs = NULL;
 520
 521    /* Allocate the private area */
 522    intelScreen = CALLOC(sizeof *intelScreen);
 523    if (!intelScreen) {
 524       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 525       return GL_FALSE;
 526    }
 527    /* parse information in __driConfigOptions */
 528    driParseOptionInfo(&intelScreen->optionCache,
 529                       __driConfigOptions, __driNConfigOptions);
 530
 531    intelScreen->driScrnPriv = psp;
 532    psp->private = (void *) intelScreen;
 533
 534    /* Determine chipset ID */
 535    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 536                         &intelScreen->deviceID))
 537       return GL_FALSE;
 538
 539    /* Allow an override of the device ID for the purpose of making the
 540     * driver produce dumps for debugging of new chipset enablement.
 541     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 542     * incorrectly.
 543     */
 544    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 545    if (devid_override) {
 546       intelScreen->deviceID = strtod(devid_override, NULL);
 547    }
 548
 549    api_mask = (1 << __DRI_API_OPENGL);
 550 #if FEATURE_ES1
 551    api_mask |= (1 << __DRI_API_GLES);
 552 #endif
 553 #if FEATURE_ES2
 554    api_mask |= (1 << __DRI_API_GLES2);
 555 #endif
 556
 557    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 558       psp->api_mask = api_mask;
 559
 560    if (!intel_init_bufmgr(intelScreen))
 561        return GL_FALSE;
 562
 563    psp->extensions = intelScreenExtensions;
 564
 565    msaa_samples_array[0] = 0;
 566
 567    fb_format[0] = GL_RGB;
 568    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 569
 570    fb_format[1] = GL_BGR;
 571    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 572
 573    fb_format[2] = GL_BGRA;
 574    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 575
 576    depth_bits[0] = 0;
 577    stencil_bits[0] = 0;
 578
 579    /* Generate a rich set of useful configs that do not include an
 580     * accumulation buffer.
 581     */
 582    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 583       __DRIconfig **new_configs;
 584       int depth_factor;
 585
 586       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 587        * buffer that has a diffferent number of bits per pixel than the color
 588        * buffer.  This isn't yet supported here.
 589        */
 590       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 591          depth_bits[1] = 16;
 592          stencil_bits[1] = 0;
 593       } else {
 594          depth_bits[1] = 24;
 595          stencil_bits[1] = 8;
 596       }
 597
 598       depth_factor = 2;
 599
 600       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 601                                      depth_bits,
 602                                      stencil_bits,
 603                                      depth_factor,
 604                                      back_buffer_modes,
 605                                      ARRAY_SIZE(back_buffer_modes),
 606                                      msaa_samples_array,
 607                                      ARRAY_SIZE(msaa_samples_array),
 608                                      GL_FALSE);
 609       if (configs == NULL)
 610          configs = new_configs;
 611       else
 612          configs = driConcatConfigs(configs, new_configs);
 613    }
 614
 615    /* Generate the minimum possible set of configs that include an
 616     * accumulation buffer.
 617     */
 618    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 619       __DRIconfig **new_configs;
 620
 621       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 622          depth_bits[0] = 16;
 623          stencil_bits[0] = 0;
 624       } else {
 625          depth_bits[0] = 24;
 626          stencil_bits[0] = 8;
 627       }
 628
 629       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 630                                      depth_bits, stencil_bits, 1,
 631                                      back_buffer_modes + 1, 1,
 632                                      msaa_samples_array, 1,
 633                                      GL_TRUE);
 634       if (configs == NULL)
 635          configs = new_configs;
 636       else
 637          configs = driConcatConfigs(configs, new_configs);
 638    }
 639
 640    if (configs == NULL) {
 641       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 642               __LINE__);
 643       return NULL;
 644    }
 645
 646    return (const __DRIconfig **)configs;
 647 }
 648
 649 struct intel_buffer {
 650    __DRIbuffer base;
 651    struct intel_region *region;
 652 };
 653
 654 static __DRIbuffer *
 655 intelAllocateBuffer(__DRIscreen *screen,
 656                     unsigned attachment, unsigned format,
 657                     int width, int height)
 658 {
 659    struct intel_buffer *intelBuffer;
 660    struct intel_screen *intelScreen = screen->private;
 661
 662    intelBuffer = CALLOC(sizeof *intelBuffer);
 663    if (intelBuffer == NULL)
 664       return NULL;
 665
 666    intelBuffer->region = intel_region_alloc(intelScreen, I915_TILING_NONE,
 667                                             format / 8, width, height, GL_TRUE);
 668
 669    if (intelBuffer->region == NULL) {
 670            FREE(intelBuffer);
 671            return NULL;
 672    }
 673
 674    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 675
 676    intelBuffer->base.attachment = attachment;
 677    intelBuffer->base.cpp = intelBuffer->region->cpp;
 678    intelBuffer->base.pitch =
 679          intelBuffer->region->pitch * intelBuffer->region->cpp;
 680
 681    return &intelBuffer->base;
 682 }
 683
 684 static void
 685 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 686 {
 687    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 688
 689    intel_region_release(&intelBuffer->region);
 690    free(intelBuffer);
 691 }
 692
 693
 694 const struct __DriverAPIRec driDriverAPI = {
 695    .DestroyScreen        = intelDestroyScreen,
 696    .CreateContext        = intelCreateContext,
 697    .DestroyContext       = intelDestroyContext,
 698    .CreateBuffer         = intelCreateBuffer,
 699    .DestroyBuffer        = intelDestroyBuffer,
 700    .MakeCurrent          = intelMakeCurrent,
 701    .UnbindContext        = intelUnbindContext,
 702    .InitScreen2          = intelInitScreen2,
 703    .AllocateBuffer       = intelAllocateBuffer,
 704    .ReleaseBuffer        = intelReleaseBuffer
 705 };
 706
 707 /* This is the table of extensions that the loader will dlsym() for. */
 708 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 709     &driCoreExtension.base,
 710     &driDRI2Extension.base,
 711     NULL
 712 };