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