src/gallium/state_trackers/dri/drm/dri2.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright 2009, VMware, Inc.
   6  * All Rights Reserved.
   7  * Copyright (C) 2010 LunarG Inc.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Keith Whitwell <keithw@vmware.com>
  28  *    Jakob Bornecrantz <wallbraker@gmail.com>
  29  *    Chia-I Wu <olv@lunarg.com>
  30  */
  31
  32 #include "util/u_memory.h"
  33 #include "util/u_inlines.h"
  34 #include "util/u_format.h"
  35 #include "util/u_debug.h"
  36 #include "state_tracker/drm_driver.h"
  37
  38 #include "dri_screen.h"
  39 #include "dri_context.h"
  40 #include "dri_drawable.h"
  41 #include "dri2_buffer.h"
  42
  43 /**
  44  * DRI2 flush extension.
  45  */
  46 static void
  47 dri2_flush_drawable(__DRIdrawable *draw)
  48 {
  49 }
  50
  51 static void
  52 dri2_invalidate_drawable(__DRIdrawable *dPriv)
  53 {
  54    struct dri_drawable *drawable = dri_drawable(dPriv);
  55    struct dri_context *ctx = drawable->context;
  56
  57    dri2InvalidateDrawable(dPriv);
  58    drawable->dPriv->lastStamp = *drawable->dPriv->pStamp;
  59
  60    if (ctx)
  61       ctx->st->notify_invalid_framebuffer(ctx->st, &drawable->base);
  62 }
  63
  64 static const __DRI2flushExtension dri2FlushExtension = {
  65     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
  66     dri2_flush_drawable,
  67     dri2_invalidate_drawable,
  68 };
  69
  70 /**
  71  * Retrieve __DRIbuffer from the DRI loader.
  72  */
  73 static __DRIbuffer *
  74 dri2_drawable_get_buffers(struct dri_drawable *drawable,
  75                           const enum st_attachment_type *statts,
  76                           unsigned *count)
  77 {
  78    __DRIdrawable *dri_drawable = drawable->dPriv;
  79    struct __DRIdri2LoaderExtensionRec *loader = drawable->sPriv->dri2.loader;
  80    boolean with_format;
  81    __DRIbuffer *buffers;
  82    int num_buffers;
  83    unsigned attachments[10];
  84    unsigned num_attachments, i;
  85
  86    assert(loader);
  87    with_format = dri_with_format(drawable->sPriv);
  88
  89    num_attachments = 0;
  90
  91    /* for Xserver 1.6.0 (DRI2 version 1) we always need to ask for the front */
  92    if (!with_format)
  93       attachments[num_attachments++] = __DRI_BUFFER_FRONT_LEFT;
  94
  95    for (i = 0; i < *count; i++) {
  96       enum pipe_format format;
  97       unsigned bind;
  98       int att, bpp;
  99
 100       dri_drawable_get_format(drawable, statts[i], &format, &bind);
 101       if (format == PIPE_FORMAT_NONE)
 102          continue;
 103
 104       switch (statts[i]) {
 105       case ST_ATTACHMENT_FRONT_LEFT:
 106          /* already added */
 107          if (!with_format)
 108             continue;
 109          att = __DRI_BUFFER_FRONT_LEFT;
 110          break;
 111       case ST_ATTACHMENT_BACK_LEFT:
 112          att = __DRI_BUFFER_BACK_LEFT;
 113          break;
 114       case ST_ATTACHMENT_FRONT_RIGHT:
 115          att = __DRI_BUFFER_FRONT_RIGHT;
 116          break;
 117       case ST_ATTACHMENT_BACK_RIGHT:
 118          att = __DRI_BUFFER_BACK_RIGHT;
 119          break;
 120       case ST_ATTACHMENT_DEPTH_STENCIL:
 121          att = __DRI_BUFFER_DEPTH_STENCIL;
 122          break;
 123       default:
 124          att = -1;
 125          break;
 126       }
 127
 128       bpp = util_format_get_blocksizebits(format);
 129
 130       if (att >= 0) {
 131          attachments[num_attachments++] = att;
 132          if (with_format) {
 133             attachments[num_attachments++] = bpp;
 134          }
 135       }
 136    }
 137
 138    if (with_format) {
 139       num_attachments /= 2;
 140       buffers = loader->getBuffersWithFormat(dri_drawable,
 141             &dri_drawable->w, &dri_drawable->h,
 142             attachments, num_attachments,
 143             &num_buffers, dri_drawable->loaderPrivate);
 144    }
 145    else {
 146       buffers = loader->getBuffers(dri_drawable,
 147             &dri_drawable->w, &dri_drawable->h,
 148             attachments, num_attachments,
 149             &num_buffers, dri_drawable->loaderPrivate);
 150    }
 151
 152    if (buffers) {
 153       /* set one cliprect to cover the whole dri_drawable */
 154       dri_drawable->x = 0;
 155       dri_drawable->y = 0;
 156       dri_drawable->backX = 0;
 157       dri_drawable->backY = 0;
 158       dri_drawable->numClipRects = 1;
 159       dri_drawable->pClipRects[0].x1 = 0;
 160       dri_drawable->pClipRects[0].y1 = 0;
 161       dri_drawable->pClipRects[0].x2 = dri_drawable->w;
 162       dri_drawable->pClipRects[0].y2 = dri_drawable->h;
 163       dri_drawable->numBackClipRects = 1;
 164       dri_drawable->pBackClipRects[0].x1 = 0;
 165       dri_drawable->pBackClipRects[0].y1 = 0;
 166       dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
 167       dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
 168
 169       *count = num_buffers;
 170    }
 171
 172    return buffers;
 173 }
 174
 175 /**
 176  * Process __DRIbuffer and convert them into pipe_resources.
 177  */
 178 static void
 179 dri2_drawable_process_buffers(struct dri_drawable *drawable,
 180                               __DRIbuffer *buffers, unsigned count)
 181 {
 182    struct dri_screen *screen = dri_screen(drawable->sPriv);
 183    __DRIdrawable *dri_drawable = drawable->dPriv;
 184    struct pipe_resource templ;
 185    struct winsys_handle whandle;
 186    boolean have_depth = FALSE;
 187    unsigned i, bind;
 188
 189    if (drawable->old_num == count &&
 190        drawable->old_w == dri_drawable->w &&
 191        drawable->old_h == dri_drawable->h &&
 192        memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0)
 193       return;
 194
 195    for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 196       pipe_resource_reference(&drawable->textures[i], NULL);
 197
 198    memset(&templ, 0, sizeof(templ));
 199    templ.target = screen->target;
 200    templ.last_level = 0;
 201    templ.width0 = dri_drawable->w;
 202    templ.height0 = dri_drawable->h;
 203    templ.depth0 = 1;
 204    templ.array_size = 1;
 205
 206    memset(&whandle, 0, sizeof(whandle));
 207
 208    for (i = 0; i < count; i++) {
 209       __DRIbuffer *buf = &buffers[i];
 210       enum st_attachment_type statt;
 211       enum pipe_format format;
 212
 213       switch (buf->attachment) {
 214       case __DRI_BUFFER_FRONT_LEFT:
 215          if (!screen->auto_fake_front) {
 216             statt = ST_ATTACHMENT_INVALID;
 217             break;
 218          }
 219          /* fallthrough */
 220       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 221          statt = ST_ATTACHMENT_FRONT_LEFT;
 222          break;
 223       case __DRI_BUFFER_BACK_LEFT:
 224          statt = ST_ATTACHMENT_BACK_LEFT;
 225          break;
 226       case __DRI_BUFFER_DEPTH:
 227       case __DRI_BUFFER_DEPTH_STENCIL:
 228       case __DRI_BUFFER_STENCIL:
 229          /* use only the first depth/stencil buffer */
 230          if (!have_depth) {
 231             have_depth = TRUE;
 232             statt = ST_ATTACHMENT_DEPTH_STENCIL;
 233          }
 234          else {
 235             statt = ST_ATTACHMENT_INVALID;
 236          }
 237          break;
 238       default:
 239          statt = ST_ATTACHMENT_INVALID;
 240          break;
 241       }
 242
 243       dri_drawable_get_format(drawable, statt, &format, &bind);
 244       if (statt == ST_ATTACHMENT_INVALID || format == PIPE_FORMAT_NONE)
 245          continue;
 246
 247       templ.format = format;
 248       templ.bind = bind;
 249       whandle.handle = buf->name;
 250       whandle.stride = buf->pitch;
 251
 252       drawable->textures[statt] =
 253          screen->base.screen->resource_from_handle(screen->base.screen,
 254                &templ, &whandle);
 255    }
 256
 257    drawable->old_num = count;
 258    drawable->old_w = dri_drawable->w;
 259    drawable->old_h = dri_drawable->h;
 260    memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
 261 }
 262
 263 static __DRIbuffer *
 264 dri2_allocate_buffer(__DRIscreen *sPriv,
 265                      unsigned attachment, unsigned format,
 266                      int width, int height)
 267 {
 268    struct dri_screen *screen = dri_screen(sPriv);
 269    struct dri2_buffer *buffer;
 270    struct pipe_resource templ;
 271    enum st_attachment_type statt;
 272    enum pipe_format pf;
 273    unsigned bind = 0;
 274    struct winsys_handle whandle;
 275
 276    switch (attachment) {
 277       case __DRI_BUFFER_FRONT_LEFT:
 278       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 279          statt = ST_ATTACHMENT_FRONT_LEFT;
 280          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 281          break;
 282       case __DRI_BUFFER_BACK_LEFT:
 283          statt = ST_ATTACHMENT_BACK_LEFT;
 284          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 285          break;
 286       case __DRI_BUFFER_DEPTH:
 287       case __DRI_BUFFER_DEPTH_STENCIL:
 288       case __DRI_BUFFER_STENCIL:
 289             statt = ST_ATTACHMENT_DEPTH_STENCIL;
 290             bind = PIPE_BIND_DEPTH_STENCIL; /* XXX sampler? */
 291          break;
 292       default:
 293          statt = ST_ATTACHMENT_INVALID;
 294          break;
 295    }
 296
 297    switch (format) {
 298       case 32:
 299          pf = PIPE_FORMAT_B8G8R8X8_UNORM;
 300          break;
 301       case 16:
 302          pf = PIPE_FORMAT_Z16_UNORM;
 303          break;
 304       default:
 305          return NULL;
 306    }
 307
 308    buffer = CALLOC_STRUCT(dri2_buffer);
 309    if (!buffer)
 310       return NULL;
 311
 312    memset(&templ, 0, sizeof(templ));
 313    templ.bind = bind;
 314    templ.format = pf;
 315    templ.target = PIPE_TEXTURE_2D;
 316    templ.last_level = 0;
 317    templ.width0 = width;
 318    templ.height0 = height;
 319    templ.depth0 = 1;
 320    templ.array_size = 1;
 321
 322    buffer->resource =
 323       screen->base.screen->resource_create(screen->base.screen, &templ);
 324    if (!buffer->resource)
 325       return NULL;
 326
 327    memset(&whandle, 0, sizeof(whandle));
 328    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 329    screen->base.screen->resource_get_handle(screen->base.screen,
 330          buffer->resource, &whandle);
 331
 332    buffer->base.attachment = attachment;
 333    buffer->base.name = whandle.handle;
 334    buffer->base.cpp = util_format_get_blocksize(pf);
 335    buffer->base.pitch = whandle.stride;
 336
 337    return &buffer->base;
 338 }
 339
 340 static void
 341 dri2_release_buffer(__DRIscreen *sPriv, __DRIbuffer *bPriv)
 342 {
 343    struct dri2_buffer *buffer = dri2_buffer(bPriv);
 344
 345    pipe_resource_reference(&buffer->resource, NULL);
 346    FREE(buffer);
 347 }
 348
 349 /*
 350  * Backend functions for st_framebuffer interface.
 351  */
 352
 353 static void
 354 dri2_allocate_textures(struct dri_drawable *drawable,
 355                        const enum st_attachment_type *statts,
 356                        unsigned count)
 357 {
 358    __DRIbuffer *buffers;
 359    unsigned num_buffers = count;
 360
 361    buffers = dri2_drawable_get_buffers(drawable, statts, &num_buffers);
 362    if (buffers)
 363       dri2_drawable_process_buffers(drawable, buffers, num_buffers);
 364 }
 365
 366 static void
 367 dri2_flush_frontbuffer(struct dri_drawable *drawable,
 368                        enum st_attachment_type statt)
 369 {
 370    __DRIdrawable *dri_drawable = drawable->dPriv;
 371    struct __DRIdri2LoaderExtensionRec *loader = drawable->sPriv->dri2.loader;
 372
 373    if (loader->flushFrontBuffer == NULL)
 374       return;
 375
 376    if (statt == ST_ATTACHMENT_FRONT_LEFT) {
 377       loader->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 378    }
 379 }
 380
 381 static __DRIimage *
 382 dri2_lookup_egl_image(struct dri_screen *screen, void *handle)
 383 {
 384    __DRIimageLookupExtension *loader = screen->sPriv->dri2.image;
 385    __DRIimage *img;
 386
 387    if (!loader->lookupEGLImage)
 388       return NULL;
 389
 390    img = loader->lookupEGLImage(screen->sPriv,
 391                                 handle, screen->sPriv->loaderPrivate);
 392
 393    return img;
 394 }
 395
 396 static __DRIimage *
 397 dri2_create_image_from_name(__DRIscreen *_screen,
 398                             int width, int height, int format,
 399                             int name, int pitch, void *loaderPrivate)
 400 {
 401    struct dri_screen *screen = dri_screen(_screen);
 402    __DRIimage *img;
 403    struct pipe_resource templ;
 404    struct winsys_handle whandle;
 405    unsigned tex_usage;
 406    enum pipe_format pf;
 407
 408    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 409
 410    switch (format) {
 411    case __DRI_IMAGE_FORMAT_RGB565:
 412       pf = PIPE_FORMAT_B5G6R5_UNORM;
 413       break;
 414    case __DRI_IMAGE_FORMAT_XRGB8888:
 415       pf = PIPE_FORMAT_B8G8R8X8_UNORM;
 416       break;
 417    case __DRI_IMAGE_FORMAT_ARGB8888:
 418       pf = PIPE_FORMAT_B8G8R8A8_UNORM;
 419       break;
 420    default:
 421       pf = PIPE_FORMAT_NONE;
 422       break;
 423    }
 424    if (pf == PIPE_FORMAT_NONE)
 425       return NULL;
 426
 427    img = CALLOC_STRUCT(__DRIimageRec);
 428    if (!img)
 429       return NULL;
 430
 431    memset(&templ, 0, sizeof(templ));
 432    templ.bind = tex_usage;
 433    templ.format = pf;
 434    templ.target = screen->target;
 435    templ.last_level = 0;
 436    templ.width0 = width;
 437    templ.height0 = height;
 438    templ.depth0 = 1;
 439    templ.array_size = 1;
 440
 441    memset(&whandle, 0, sizeof(whandle));
 442    whandle.handle = name;
 443    whandle.stride = pitch * util_format_get_blocksize(pf);
 444
 445    img->texture = screen->base.screen->resource_from_handle(screen->base.screen,
 446          &templ, &whandle);
 447    if (!img->texture) {
 448       FREE(img);
 449       return NULL;
 450    }
 451
 452    img->level = 0;
 453    img->layer = 0;
 454    img->loader_private = loaderPrivate;
 455
 456    return img;
 457 }
 458
 459 static __DRIimage *
 460 dri2_create_image_from_renderbuffer(__DRIcontext *context,
 461                                     int renderbuffer, void *loaderPrivate)
 462 {
 463    struct dri_context *ctx = dri_context(context);
 464
 465    if (!ctx->st->get_resource_for_egl_image)
 466       return NULL;
 467
 468    /* TODO */
 469    return NULL;
 470 }
 471
 472 static __DRIimage *
 473 dri2_create_image(__DRIscreen *_screen,
 474                    int width, int height, int format,
 475                    unsigned int use, void *loaderPrivate)
 476 {
 477    struct dri_screen *screen = dri_screen(_screen);
 478    __DRIimage *img;
 479    struct pipe_resource templ;
 480    unsigned tex_usage;
 481    enum pipe_format pf;
 482
 483    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 484    if (use & __DRI_IMAGE_USE_SCANOUT)
 485       tex_usage |= PIPE_BIND_SCANOUT;
 486    if (use & __DRI_IMAGE_USE_SHARE)
 487       tex_usage |= PIPE_BIND_SHARED;
 488    if (use & __DRI_IMAGE_USE_CURSOR) {
 489       if (width != 64 || height != 64)
 490          return NULL;
 491       tex_usage |= PIPE_BIND_CURSOR;
 492    }
 493
 494    switch (format) {
 495    case __DRI_IMAGE_FORMAT_RGB565:
 496       pf = PIPE_FORMAT_B5G6R5_UNORM;
 497       break;
 498    case __DRI_IMAGE_FORMAT_XRGB8888:
 499       pf = PIPE_FORMAT_B8G8R8X8_UNORM;
 500       break;
 501    case __DRI_IMAGE_FORMAT_ARGB8888:
 502       pf = PIPE_FORMAT_B8G8R8A8_UNORM;
 503       break;
 504    default:
 505       pf = PIPE_FORMAT_NONE;
 506       break;
 507    }
 508    if (pf == PIPE_FORMAT_NONE)
 509       return NULL;
 510
 511    img = CALLOC_STRUCT(__DRIimageRec);
 512    if (!img)
 513       return NULL;
 514
 515    memset(&templ, 0, sizeof(templ));
 516    templ.bind = tex_usage;
 517    templ.format = pf;
 518    templ.target = PIPE_TEXTURE_2D;
 519    templ.last_level = 0;
 520    templ.width0 = width;
 521    templ.height0 = height;
 522    templ.depth0 = 1;
 523    templ.array_size = 1;
 524
 525    img->texture = screen->base.screen->resource_create(screen->base.screen, &templ);
 526    if (!img->texture) {
 527       FREE(img);
 528       return NULL;
 529    }
 530
 531    img->level = 0;
 532    img->layer = 0;
 533
 534    img->loader_private = loaderPrivate;
 535    return img;
 536 }
 537
 538 static GLboolean
 539 dri2_query_image(__DRIimage *image, int attrib, int *value)
 540 {
 541    struct winsys_handle whandle;
 542    memset(&whandle, 0, sizeof(whandle));
 543
 544    switch (attrib) {
 545    case __DRI_IMAGE_ATTRIB_STRIDE:
 546       image->texture->screen->resource_get_handle(image->texture->screen,
 547             image->texture, &whandle);
 548       *value = whandle.stride;
 549       return GL_TRUE;
 550    case __DRI_IMAGE_ATTRIB_HANDLE:
 551       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 552       image->texture->screen->resource_get_handle(image->texture->screen,
 553          image->texture, &whandle);
 554       *value = whandle.handle;
 555       return GL_TRUE;
 556    case __DRI_IMAGE_ATTRIB_NAME:
 557       whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 558       image->texture->screen->resource_get_handle(image->texture->screen,
 559          image->texture, &whandle);
 560       *value = whandle.handle;
 561       return GL_TRUE;
 562    default:
 563       return GL_FALSE;
 564    }
 565 }
 566
 567 static void
 568 dri2_destroy_image(__DRIimage *img)
 569 {
 570    pipe_resource_reference(&img->texture, NULL);
 571    FREE(img);
 572 }
 573
 574 static struct __DRIimageExtensionRec dri2ImageExtension = {
 575     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 576     dri2_create_image_from_name,
 577     dri2_create_image_from_renderbuffer,
 578     dri2_destroy_image,
 579     dri2_create_image,
 580     dri2_query_image,
 581 };
 582
 583 /*
 584  * Backend function init_screen.
 585  */
 586
 587 static const __DRIextension *dri_screen_extensions[] = {
 588    &driReadDrawableExtension,
 589    &driCopySubBufferExtension.base,
 590    &driSwapControlExtension.base,
 591    &driMediaStreamCounterExtension.base,
 592    &driTexBufferExtension.base,
 593    &dri2FlushExtension.base,
 594    &dri2ImageExtension.base,
 595    &dri2ConfigQueryExtension.base,
 596    NULL
 597 };
 598
 599 /**
 600  * This is the driver specific part of the createNewScreen entry point.
 601  *
 602  * Returns the struct gl_config supported by this driver.
 603  */
 604 static const __DRIconfig **
 605 dri2_init_screen(__DRIscreen * sPriv)
 606 {
 607    const __DRIconfig **configs;
 608    struct dri_screen *screen;
 609    struct pipe_screen *pscreen;
 610
 611    screen = CALLOC_STRUCT(dri_screen);
 612    if (!screen)
 613       return NULL;
 614
 615    screen->sPriv = sPriv;
 616    screen->fd = sPriv->fd;
 617
 618    sPriv->private = (void *)screen;
 619    sPriv->extensions = dri_screen_extensions;
 620
 621    pscreen = driver_descriptor.create_screen(screen->fd);
 622    /* dri_init_screen_helper checks pscreen for us */
 623
 624    configs = dri_init_screen_helper(screen, pscreen, 32);
 625    if (!configs)
 626       goto fail;
 627
 628    sPriv->api_mask = 0;
 629    if (screen->st_api->profile_mask & ST_PROFILE_DEFAULT_MASK)
 630       sPriv->api_mask |= 1 << __DRI_API_OPENGL;
 631    if (screen->st_api->profile_mask & ST_PROFILE_OPENGL_ES1_MASK)
 632       sPriv->api_mask |= 1 << __DRI_API_GLES;
 633    if (screen->st_api->profile_mask & ST_PROFILE_OPENGL_ES2_MASK)
 634       sPriv->api_mask |= 1 << __DRI_API_GLES2;
 635
 636    screen->auto_fake_front = dri_with_format(sPriv);
 637    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
 638    screen->lookup_egl_image = dri2_lookup_egl_image;
 639
 640    return configs;
 641 fail:
 642    dri_destroy_screen_helper(screen);
 643    FREE(screen);
 644    return NULL;
 645 }
 646
 647 static boolean
 648 dri2_create_context(gl_api api, const struct gl_config * visual,
 649                     __DRIcontext * cPriv, void *sharedContextPrivate)
 650 {
 651    struct dri_context *ctx = NULL;
 652
 653    if (!dri_create_context(api, visual, cPriv, sharedContextPrivate))
 654       return FALSE;
 655
 656    ctx = cPriv->driverPrivate;
 657
 658    return TRUE;
 659 }
 660
 661 static boolean
 662 dri2_create_buffer(__DRIscreen * sPriv,
 663                    __DRIdrawable * dPriv,
 664                    const struct gl_config * visual, boolean isPixmap)
 665 {
 666    struct dri_drawable *drawable = NULL;
 667
 668    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
 669       return FALSE;
 670
 671    drawable = dPriv->driverPrivate;
 672
 673    drawable->allocate_textures = dri2_allocate_textures;
 674    drawable->flush_frontbuffer = dri2_flush_frontbuffer;
 675
 676    return TRUE;
 677 }
 678
 679 /**
 680  * DRI driver virtual function table.
 681  *
 682  * DRI versions differ in their implementation of init_screen and swap_buffers.
 683  */
 684 const struct __DriverAPIRec driDriverAPI = {
 685    .InitScreen = NULL,
 686    .InitScreen2 = dri2_init_screen,
 687    .DestroyScreen = dri_destroy_screen,
 688    .CreateContext = dri2_create_context,
 689    .DestroyContext = dri_destroy_context,
 690    .CreateBuffer = dri2_create_buffer,
 691    .DestroyBuffer = dri_destroy_buffer,
 692    .MakeCurrent = dri_make_current,
 693    .UnbindContext = dri_unbind_context,
 694
 695    .GetSwapInfo = NULL,
 696    .GetDrawableMSC = NULL,
 697    .WaitForMSC = NULL,
 698
 699    .SwapBuffers = NULL,
 700    .CopySubBuffer = NULL,
 701
 702    .AllocateBuffer = dri2_allocate_buffer,
 703    .ReleaseBuffer  = dri2_release_buffer,
 704 };
 705
 706 /* This is the table of extensions that the loader will dlsym() for. */
 707 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 708     &driCoreExtension.base,
 709     &driLegacyExtension.base,
 710     &driDRI2Extension.base,
 711     NULL
 712 };
 713
 714 /* vim: set sw=3 ts=8 sts=3 expandtab: */