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 <errno.h>
  29 #include "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/framebuffer.h"
  32 #include "main/renderbuffer.h"
  33 #include "main/hash.h"
  34 #include "main/fbobject.h"
  35 #include "main/mfeatures.h"
  36
  37 #include "utils.h"
  38 #include "xmlpool.h"
  39
  40 PUBLIC const char __driConfigOptions[] =
  41    DRI_CONF_BEGIN
  42    DRI_CONF_SECTION_PERFORMANCE
  43       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  44       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  45        * DRI_CONF_BO_REUSE_ALL
  46        */
  47       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  48          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  49             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  50             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  51          DRI_CONF_DESC_END
  52       DRI_CONF_OPT_END
  53
  54       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  55          DRI_CONF_DESC(en, "Enable texture tiling")
  56       DRI_CONF_OPT_END
  57
  58       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  59          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  60       DRI_CONF_OPT_END
  61
  62       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  63          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  64       DRI_CONF_OPT_END
  65
  66    DRI_CONF_SECTION_END
  67    DRI_CONF_SECTION_QUALITY
  68       DRI_CONF_FORCE_S3TC_ENABLE(false)
  69       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  70    DRI_CONF_SECTION_END
  71    DRI_CONF_SECTION_DEBUG
  72      DRI_CONF_NO_RAST(false)
  73      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  74      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  75
  76       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  77          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  78       DRI_CONF_OPT_END
  79    DRI_CONF_SECTION_END
  80 DRI_CONF_END;
  81
  82 const GLuint __driNConfigOptions = 11;
  83
  84 #include "intel_batchbuffer.h"
  85 #include "intel_buffers.h"
  86 #include "intel_bufmgr.h"
  87 #include "intel_chipset.h"
  88 #include "intel_fbo.h"
  89 #include "intel_screen.h"
  90 #include "intel_tex.h"
  91 #include "intel_regions.h"
  92
  93 #include "i915_drm.h"
  94
  95 #ifdef USE_NEW_INTERFACE
  96 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  97 #endif /*USE_NEW_INTERFACE */
  98
  99 static const __DRItexBufferExtension intelTexBufferExtension = {
 100     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 101    intelSetTexBuffer,
 102    intelSetTexBuffer2,
 103 };
 104
 105 static void
 106 intelDRI2Flush(__DRIdrawable *drawable)
 107 {
 108    GET_CURRENT_CONTEXT(ctx);
 109    struct intel_context *intel = intel_context(ctx);
 110
 111    if (intel->gen < 4)
 112       INTEL_FIREVERTICES(intel);
 113
 114    intel->need_throttle = GL_TRUE;
 115
 116    if (intel->batch.used)
 117       intel_batchbuffer_flush(intel);
 118 }
 119
 120 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 121     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 122     intelDRI2Flush,
 123     dri2InvalidateDrawable,
 124 };
 125
 126 static __DRIimage *
 127 intel_create_image_from_name(__DRIscreen *screen,
 128                              int width, int height, int format,
 129                              int name, int pitch, void *loaderPrivate)
 130 {
 131     struct intel_screen *intelScreen = screen->private;
 132     __DRIimage *image;
 133     int cpp;
 134
 135     image = CALLOC(sizeof *image);
 136     if (image == NULL)
 137         return NULL;
 138
 139     switch (format) {
 140     case __DRI_IMAGE_FORMAT_RGB565:
 141        image->format = MESA_FORMAT_RGB565;
 142        image->internal_format = GL_RGB;
 143        image->data_type = GL_UNSIGNED_BYTE;
 144        break;
 145     case __DRI_IMAGE_FORMAT_XRGB8888:
 146        image->format = MESA_FORMAT_XRGB8888;
 147        image->internal_format = GL_RGB;
 148        image->data_type = GL_UNSIGNED_BYTE;
 149        break;
 150     case __DRI_IMAGE_FORMAT_ARGB8888:
 151        image->format = MESA_FORMAT_ARGB8888;
 152        image->internal_format = GL_RGBA;
 153        image->data_type = GL_UNSIGNED_BYTE;
 154        break;
 155     default:
 156        free(image);
 157        return NULL;
 158     }
 159
 160     image->data = loaderPrivate;
 161     cpp = _mesa_get_format_bytes(image->format);
 162
 163     image->region = intel_region_alloc_for_handle(intelScreen,
 164                                                   cpp, width, height,
 165                                                   pitch, name, "image");
 166     if (image->region == NULL) {
 167        FREE(image);
 168        return NULL;
 169     }
 170
 171     return image;
 172 }
 173
 174 static __DRIimage *
 175 intel_create_image_from_renderbuffer(__DRIcontext *context,
 176                                      int renderbuffer, void *loaderPrivate)
 177 {
 178    __DRIimage *image;
 179    struct intel_context *intel = context->driverPrivate;
 180    struct gl_renderbuffer *rb;
 181    struct intel_renderbuffer *irb;
 182
 183    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 184    if (!rb) {
 185       _mesa_error(&intel->ctx,
 186                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 187       return NULL;
 188    }
 189
 190    irb = intel_renderbuffer(rb);
 191    image = CALLOC(sizeof *image);
 192    if (image == NULL)
 193       return NULL;
 194
 195    image->internal_format = rb->InternalFormat;
 196    image->format = rb->Format;
 197    image->data_type = rb->DataType;
 198    image->data = loaderPrivate;
 199    intel_region_reference(&image->region, irb->region);
 200
 201    return image;
 202 }
 203
 204 static void
 205 intel_destroy_image(__DRIimage *image)
 206 {
 207     intel_region_release(&image->region);
 208     FREE(image);
 209 }
 210
 211 static __DRIimage *
 212 intel_create_image(__DRIscreen *screen,
 213                    int width, int height, int format,
 214                    unsigned int use,
 215                    void *loaderPrivate)
 216 {
 217    __DRIimage *image;
 218    struct intel_screen *intelScreen = screen->private;
 219    uint32_t tiling;
 220    int cpp;
 221
 222    tiling = I915_TILING_X;
 223    if (use & __DRI_IMAGE_USE_CURSOR) {
 224       if (width != 64 || height != 64)
 225          return NULL;
 226       tiling = I915_TILING_NONE;
 227    }
 228
 229    image = CALLOC(sizeof *image);
 230    if (image == NULL)
 231       return NULL;
 232
 233    switch (format) {
 234    case __DRI_IMAGE_FORMAT_RGB565:
 235       image->format = MESA_FORMAT_RGB565;
 236       image->internal_format = GL_RGB;
 237       image->data_type = GL_UNSIGNED_BYTE;
 238       break;
 239    case __DRI_IMAGE_FORMAT_XRGB8888:
 240       image->format = MESA_FORMAT_XRGB8888;
 241       image->internal_format = GL_RGB;
 242       image->data_type = GL_UNSIGNED_BYTE;
 243       break;
 244    case __DRI_IMAGE_FORMAT_ARGB8888:
 245       image->format = MESA_FORMAT_ARGB8888;
 246       image->internal_format = GL_RGBA;
 247       image->data_type = GL_UNSIGNED_BYTE;
 248       break;
 249    default:
 250       free(image);
 251       return NULL;
 252    }
 253
 254    image->data = loaderPrivate;
 255    cpp = _mesa_get_format_bytes(image->format);
 256
 257    image->region =
 258       intel_region_alloc(intelScreen, tiling,
 259                          cpp, width, height, GL_TRUE);
 260    if (image->region == NULL) {
 261       FREE(image);
 262       return NULL;
 263    }
 264
 265    return image;
 266 }
 267
 268 static GLboolean
 269 intel_query_image(__DRIimage *image, int attrib, int *value)
 270 {
 271    switch (attrib) {
 272    case __DRI_IMAGE_ATTRIB_STRIDE:
 273       *value = image->region->pitch * image->region->cpp;
 274       return GL_TRUE;
 275    case __DRI_IMAGE_ATTRIB_HANDLE:
 276       *value = image->region->buffer->handle;
 277       return GL_TRUE;
 278    case __DRI_IMAGE_ATTRIB_NAME:
 279       return intel_region_flink(image->region, (uint32_t *) value);
 280    default:
 281       return GL_FALSE;
 282    }
 283 }
 284
 285 static struct __DRIimageExtensionRec intelImageExtension = {
 286     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 287     intel_create_image_from_name,
 288     intel_create_image_from_renderbuffer,
 289     intel_destroy_image,
 290     intel_create_image,
 291     intel_query_image
 292 };
 293
 294 static const __DRIextension *intelScreenExtensions[] = {
 295     &driReadDrawableExtension,
 296     &intelTexBufferExtension.base,
 297     &intelFlushExtension.base,
 298     &intelImageExtension.base,
 299     &dri2ConfigQueryExtension.base,
 300     NULL
 301 };
 302
 303 static GLboolean
 304 intel_get_param(__DRIscreen *psp, int param, int *value)
 305 {
 306    int ret;
 307    struct drm_i915_getparam gp;
 308
 309    gp.param = param;
 310    gp.value = value;
 311
 312    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 313    if (ret) {
 314       if (ret != -EINVAL)
 315          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 316       return GL_FALSE;
 317    }
 318
 319    return GL_TRUE;
 320 }
 321
 322 static GLboolean
 323 intel_get_boolean(__DRIscreen *psp, int param)
 324 {
 325    int value = 0;
 326    return intel_get_param(psp, param, &value) && value;
 327 }
 328
 329 static void
 330 nop_callback(GLuint key, void *data, void *userData)
 331 {
 332 }
 333
 334 static void
 335 intelDestroyScreen(__DRIscreen * sPriv)
 336 {
 337    struct intel_screen *intelScreen = sPriv->private;
 338
 339    dri_bufmgr_destroy(intelScreen->bufmgr);
 340    driDestroyOptionInfo(&intelScreen->optionCache);
 341
 342    /* Some regions may still have references to them at this point, so
 343     * flush the hash table to prevent _mesa_DeleteHashTable() from
 344     * complaining about the hash not being empty; */
 345    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 346    _mesa_DeleteHashTable(intelScreen->named_regions);
 347
 348    FREE(intelScreen);
 349    sPriv->private = NULL;
 350 }
 351
 352
 353 /**
 354  * This is called when we need to set up GL rendering to a new X window.
 355  */
 356 static GLboolean
 357 intelCreateBuffer(__DRIscreen * driScrnPriv,
 358                   __DRIdrawable * driDrawPriv,
 359                   const struct gl_config * mesaVis, GLboolean isPixmap)
 360 {
 361    struct intel_renderbuffer *rb;
 362
 363    if (isPixmap) {
 364       return GL_FALSE;          /* not implemented */
 365    }
 366    else {
 367       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 368                              mesaVis->depthBits != 24);
 369       gl_format rgbFormat;
 370
 371       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 372
 373       if (!fb)
 374          return GL_FALSE;
 375
 376       _mesa_initialize_window_framebuffer(fb, mesaVis);
 377
 378       if (mesaVis->redBits == 5)
 379          rgbFormat = MESA_FORMAT_RGB565;
 380       else if (mesaVis->alphaBits == 0)
 381          rgbFormat = MESA_FORMAT_XRGB8888;
 382       else
 383          rgbFormat = MESA_FORMAT_ARGB8888;
 384
 385       /* setup the hardware-based renderbuffers */
 386       rb = intel_create_renderbuffer(rgbFormat);
 387       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 388
 389       if (mesaVis->doubleBufferMode) {
 390          rb = intel_create_renderbuffer(rgbFormat);
 391          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 392       }
 393
 394       if (mesaVis->depthBits == 24) {
 395          assert(mesaVis->stencilBits == 8);
 396          /* combined depth/stencil buffer */
 397          struct intel_renderbuffer *depthStencilRb
 398             = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 399          /* note: bind RB to two attachment points */
 400          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthStencilRb->Base);
 401          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &depthStencilRb->Base);
 402       }
 403       else if (mesaVis->depthBits == 16) {
 404          /* just 16-bit depth buffer, no hw stencil */
 405          struct intel_renderbuffer *depthRb
 406             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 407          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 408       }
 409
 410       /* now add any/all software-based renderbuffers we may need */
 411       _mesa_add_soft_renderbuffers(fb,
 412                                    GL_FALSE, /* never sw color */
 413                                    GL_FALSE, /* never sw depth */
 414                                    swStencil, mesaVis->accumRedBits > 0,
 415                                    GL_FALSE, /* never sw alpha */
 416                                    GL_FALSE  /* never sw aux */ );
 417       driDrawPriv->driverPrivate = fb;
 418
 419       return GL_TRUE;
 420    }
 421 }
 422
 423 static void
 424 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 425 {
 426     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 427
 428     _mesa_reference_framebuffer(&fb, NULL);
 429 }
 430
 431 /* There are probably better ways to do this, such as an
 432  * init-designated function to register chipids and createcontext
 433  * functions.
 434  */
 435 extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
 436                                    __DRIcontext * driContextPriv,
 437                                    void *sharedContextPrivate);
 438
 439 extern GLboolean i915CreateContext(int api,
 440                                    const struct gl_config * mesaVis,
 441                                    __DRIcontext * driContextPriv,
 442                                    void *sharedContextPrivate);
 443 extern GLboolean brwCreateContext(int api,
 444                                   const struct gl_config * mesaVis,
 445                                   __DRIcontext * driContextPriv,
 446                                   void *sharedContextPrivate);
 447
 448 static GLboolean
 449 intelCreateContext(gl_api api,
 450                    const struct gl_config * mesaVis,
 451                    __DRIcontext * driContextPriv,
 452                    void *sharedContextPrivate)
 453 {
 454    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 455    struct intel_screen *intelScreen = sPriv->private;
 456
 457 #ifdef I915
 458    if (IS_9XX(intelScreen->deviceID)) {
 459       if (!IS_965(intelScreen->deviceID)) {
 460          return i915CreateContext(api, mesaVis, driContextPriv,
 461                                   sharedContextPrivate);
 462       }
 463    } else {
 464       intelScreen->no_vbo = GL_TRUE;
 465       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 466    }
 467 #else
 468    if (IS_965(intelScreen->deviceID))
 469       return brwCreateContext(api, mesaVis,
 470                               driContextPriv, sharedContextPrivate);
 471 #endif
 472    fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 473    return GL_FALSE;
 474 }
 475
 476 static GLboolean
 477 intel_init_bufmgr(struct intel_screen *intelScreen)
 478 {
 479    __DRIscreen *spriv = intelScreen->driScrnPriv;
 480    int num_fences = 0;
 481
 482    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 483                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 484
 485    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 486    if (intelScreen->bufmgr == NULL) {
 487       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 488               __func__, __LINE__);
 489       return GL_FALSE;
 490    }
 491
 492    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 493        num_fences == 0) {
 494       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 495       return GL_FALSE;
 496    }
 497
 498    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 499
 500    intelScreen->named_regions = _mesa_NewHashTable();
 501
 502    intelScreen->relaxed_relocations = 0;
 503    intelScreen->relaxed_relocations |=
 504       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 505
 506    return GL_TRUE;
 507 }
 508
 509 /**
 510  * This is the driver specific part of the createNewScreen entry point.
 511  * Called when using DRI2.
 512  *
 513  * \return the struct gl_config supported by this driver
 514  */
 515 static const
 516 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 517 {
 518    struct intel_screen *intelScreen;
 519    GLenum fb_format[3];
 520    GLenum fb_type[3];
 521    unsigned int api_mask;
 522    char *devid_override;
 523
 524    static const GLenum back_buffer_modes[] = {
 525        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 526    };
 527    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 528    int color;
 529    __DRIconfig **configs = NULL;
 530
 531    /* Allocate the private area */
 532    intelScreen = CALLOC(sizeof *intelScreen);
 533    if (!intelScreen) {
 534       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 535       return GL_FALSE;
 536    }
 537    /* parse information in __driConfigOptions */
 538    driParseOptionInfo(&intelScreen->optionCache,
 539                       __driConfigOptions, __driNConfigOptions);
 540
 541    intelScreen->driScrnPriv = psp;
 542    psp->private = (void *) intelScreen;
 543
 544    /* Determine chipset ID */
 545    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 546                         &intelScreen->deviceID))
 547       return GL_FALSE;
 548
 549    /* Allow an override of the device ID for the purpose of making the
 550     * driver produce dumps for debugging of new chipset enablement.
 551     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 552     * incorrectly.
 553     */
 554    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 555    if (devid_override) {
 556       intelScreen->deviceID = strtod(devid_override, NULL);
 557    }
 558
 559    if (IS_GEN7(intelScreen->deviceID)) {
 560       intelScreen->gen = 7;
 561    } else if (IS_GEN6(intelScreen->deviceID)) {
 562       intelScreen->gen = 6;
 563    } else if (IS_GEN5(intelScreen->deviceID)) {
 564       intelScreen->gen = 5;
 565    } else if (IS_965(intelScreen->deviceID)) {
 566       intelScreen->gen = 4;
 567    } else if (IS_9XX(intelScreen->deviceID)) {
 568       intelScreen->gen = 3;
 569    } else {
 570       intelScreen->gen = 2;
 571    }
 572
 573    api_mask = (1 << __DRI_API_OPENGL);
 574 #if FEATURE_ES1
 575    api_mask |= (1 << __DRI_API_GLES);
 576 #endif
 577 #if FEATURE_ES2
 578    api_mask |= (1 << __DRI_API_GLES2);
 579 #endif
 580
 581    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 582       psp->api_mask = api_mask;
 583
 584    if (!intel_init_bufmgr(intelScreen))
 585        return GL_FALSE;
 586
 587    psp->extensions = intelScreenExtensions;
 588
 589    msaa_samples_array[0] = 0;
 590
 591    fb_format[0] = GL_RGB;
 592    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 593
 594    fb_format[1] = GL_BGR;
 595    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 596
 597    fb_format[2] = GL_BGRA;
 598    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 599
 600    depth_bits[0] = 0;
 601    stencil_bits[0] = 0;
 602
 603    /* Generate a rich set of useful configs that do not include an
 604     * accumulation buffer.
 605     */
 606    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 607       __DRIconfig **new_configs;
 608       int depth_factor;
 609
 610       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 611        * buffer that has a diffferent number of bits per pixel than the color
 612        * buffer.  This isn't yet supported here.
 613        */
 614       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 615          depth_bits[1] = 16;
 616          stencil_bits[1] = 0;
 617       } else {
 618          depth_bits[1] = 24;
 619          stencil_bits[1] = 8;
 620       }
 621
 622       depth_factor = 2;
 623
 624       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 625                                      depth_bits,
 626                                      stencil_bits,
 627                                      depth_factor,
 628                                      back_buffer_modes,
 629                                      ARRAY_SIZE(back_buffer_modes),
 630                                      msaa_samples_array,
 631                                      ARRAY_SIZE(msaa_samples_array),
 632                                      GL_FALSE);
 633       if (configs == NULL)
 634          configs = new_configs;
 635       else
 636          configs = driConcatConfigs(configs, new_configs);
 637    }
 638
 639    /* Generate the minimum possible set of configs that include an
 640     * accumulation buffer.
 641     */
 642    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 643       __DRIconfig **new_configs;
 644
 645       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 646          depth_bits[0] = 16;
 647          stencil_bits[0] = 0;
 648       } else {
 649          depth_bits[0] = 24;
 650          stencil_bits[0] = 8;
 651       }
 652
 653       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 654                                      depth_bits, stencil_bits, 1,
 655                                      back_buffer_modes + 1, 1,
 656                                      msaa_samples_array, 1,
 657                                      GL_TRUE);
 658       if (configs == NULL)
 659          configs = new_configs;
 660       else
 661          configs = driConcatConfigs(configs, new_configs);
 662    }
 663
 664    if (configs == NULL) {
 665       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 666               __LINE__);
 667       return NULL;
 668    }
 669
 670    return (const __DRIconfig **)configs;
 671 }
 672
 673 struct intel_buffer {
 674    __DRIbuffer base;
 675    struct intel_region *region;
 676 };
 677
 678 static __DRIbuffer *
 679 intelAllocateBuffer(__DRIscreen *screen,
 680                     unsigned attachment, unsigned format,
 681                     int width, int height)
 682 {
 683    struct intel_buffer *intelBuffer;
 684    struct intel_screen *intelScreen = screen->private;
 685    uint32_t tiling;
 686
 687    intelBuffer = CALLOC(sizeof *intelBuffer);
 688    if (intelBuffer == NULL)
 689       return NULL;
 690
 691    if ((attachment == __DRI_BUFFER_DEPTH ||
 692         attachment == __DRI_BUFFER_STENCIL ||
 693         attachment == __DRI_BUFFER_DEPTH_STENCIL) &&
 694        intelScreen->gen >= 4)
 695       tiling = I915_TILING_Y;
 696    else
 697       tiling = I915_TILING_X;
 698
 699    intelBuffer->region = intel_region_alloc(intelScreen, tiling,
 700                                             format / 8, width, height, GL_TRUE);
 701
 702    if (intelBuffer->region == NULL) {
 703            FREE(intelBuffer);
 704            return NULL;
 705    }
 706
 707    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 708
 709    intelBuffer->base.attachment = attachment;
 710    intelBuffer->base.cpp = intelBuffer->region->cpp;
 711    intelBuffer->base.pitch =
 712          intelBuffer->region->pitch * intelBuffer->region->cpp;
 713
 714    return &intelBuffer->base;
 715 }
 716
 717 static void
 718 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 719 {
 720    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 721
 722    intel_region_release(&intelBuffer->region);
 723    free(intelBuffer);
 724 }
 725
 726
 727 const struct __DriverAPIRec driDriverAPI = {
 728    .DestroyScreen        = intelDestroyScreen,
 729    .CreateContext        = intelCreateContext,
 730    .DestroyContext       = intelDestroyContext,
 731    .CreateBuffer         = intelCreateBuffer,
 732    .DestroyBuffer        = intelDestroyBuffer,
 733    .MakeCurrent          = intelMakeCurrent,
 734    .UnbindContext        = intelUnbindContext,
 735    .InitScreen2          = intelInitScreen2,
 736    .AllocateBuffer       = intelAllocateBuffer,
 737    .ReleaseBuffer        = intelReleaseBuffer
 738 };
 739
 740 /* This is the table of extensions that the loader will dlsym() for. */
 741 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 742     &driCoreExtension.base,
 743     &driDRI2Extension.base,
 744     NULL
 745 };