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
  56    dri2InvalidateDrawable(dPriv);
  57    drawable->dPriv->lastStamp = *drawable->dPriv->pStamp;
  58
  59    p_atomic_inc(&drawable->base.stamp);
  60 }
  61
  62 static const __DRI2flushExtension dri2FlushExtension = {
  63     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
  64     dri2_flush_drawable,
  65     dri2_invalidate_drawable,
  66 };
  67
  68 /**
  69  * Retrieve __DRIbuffer from the DRI loader.
  70  */
  71 static __DRIbuffer *
  72 dri2_drawable_get_buffers(struct dri_drawable *drawable,
  73                           const enum st_attachment_type *statts,
  74                           unsigned *count)
  75 {
  76    __DRIdrawable *dri_drawable = drawable->dPriv;
  77    struct __DRIdri2LoaderExtensionRec *loader = drawable->sPriv->dri2.loader;
  78    boolean with_format;
  79    __DRIbuffer *buffers;
  80    int num_buffers;
  81    unsigned attachments[10];
  82    unsigned num_attachments, i;
  83
  84    assert(loader);
  85    with_format = dri_with_format(drawable->sPriv);
  86
  87    num_attachments = 0;
  88
  89    /* for Xserver 1.6.0 (DRI2 version 1) we always need to ask for the front */
  90    if (!with_format)
  91       attachments[num_attachments++] = __DRI_BUFFER_FRONT_LEFT;
  92
  93    for (i = 0; i < *count; i++) {
  94       enum pipe_format format;
  95       unsigned bind;
  96       int att, bpp;
  97
  98       dri_drawable_get_format(drawable, statts[i], &format, &bind);
  99       if (format == PIPE_FORMAT_NONE)
 100          continue;
 101
 102       switch (statts[i]) {
 103       case ST_ATTACHMENT_FRONT_LEFT:
 104          /* already added */
 105          if (!with_format)
 106             continue;
 107          att = __DRI_BUFFER_FRONT_LEFT;
 108          break;
 109       case ST_ATTACHMENT_BACK_LEFT:
 110          att = __DRI_BUFFER_BACK_LEFT;
 111          break;
 112       case ST_ATTACHMENT_FRONT_RIGHT:
 113          att = __DRI_BUFFER_FRONT_RIGHT;
 114          break;
 115       case ST_ATTACHMENT_BACK_RIGHT:
 116          att = __DRI_BUFFER_BACK_RIGHT;
 117          break;
 118       case ST_ATTACHMENT_DEPTH_STENCIL:
 119          att = __DRI_BUFFER_DEPTH_STENCIL;
 120          break;
 121       default:
 122          att = -1;
 123          break;
 124       }
 125
 126       bpp = util_format_get_blocksizebits(format);
 127
 128       if (att >= 0) {
 129          attachments[num_attachments++] = att;
 130          if (with_format) {
 131             attachments[num_attachments++] = bpp;
 132          }
 133       }
 134    }
 135
 136    if (with_format) {
 137       num_attachments /= 2;
 138       buffers = loader->getBuffersWithFormat(dri_drawable,
 139             &dri_drawable->w, &dri_drawable->h,
 140             attachments, num_attachments,
 141             &num_buffers, dri_drawable->loaderPrivate);
 142    }
 143    else {
 144       buffers = loader->getBuffers(dri_drawable,
 145             &dri_drawable->w, &dri_drawable->h,
 146             attachments, num_attachments,
 147             &num_buffers, dri_drawable->loaderPrivate);
 148    }
 149
 150    if (buffers) {
 151       /* set one cliprect to cover the whole dri_drawable */
 152       dri_drawable->x = 0;
 153       dri_drawable->y = 0;
 154       dri_drawable->backX = 0;
 155       dri_drawable->backY = 0;
 156       dri_drawable->numClipRects = 1;
 157       dri_drawable->pClipRects[0].x1 = 0;
 158       dri_drawable->pClipRects[0].y1 = 0;
 159       dri_drawable->pClipRects[0].x2 = dri_drawable->w;
 160       dri_drawable->pClipRects[0].y2 = dri_drawable->h;
 161       dri_drawable->numBackClipRects = 1;
 162       dri_drawable->pBackClipRects[0].x1 = 0;
 163       dri_drawable->pBackClipRects[0].y1 = 0;
 164       dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
 165       dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
 166
 167       *count = num_buffers;
 168    }
 169
 170    return buffers;
 171 }
 172
 173 /**
 174  * Process __DRIbuffer and convert them into pipe_resources.
 175  */
 176 static void
 177 dri2_drawable_process_buffers(struct dri_drawable *drawable,
 178                               __DRIbuffer *buffers, unsigned count)
 179 {
 180    struct dri_screen *screen = dri_screen(drawable->sPriv);
 181    __DRIdrawable *dri_drawable = drawable->dPriv;
 182    struct pipe_resource templ;
 183    struct winsys_handle whandle;
 184    boolean have_depth = FALSE;
 185    unsigned i, bind;
 186
 187    if (drawable->old_num == count &&
 188        drawable->old_w == dri_drawable->w &&
 189        drawable->old_h == dri_drawable->h &&
 190        memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0)
 191       return;
 192
 193    for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 194       pipe_resource_reference(&drawable->textures[i], NULL);
 195
 196    memset(&templ, 0, sizeof(templ));
 197    templ.target = screen->target;
 198    templ.last_level = 0;
 199    templ.width0 = dri_drawable->w;
 200    templ.height0 = dri_drawable->h;
 201    templ.depth0 = 1;
 202    templ.array_size = 1;
 203
 204    memset(&whandle, 0, sizeof(whandle));
 205
 206    for (i = 0; i < count; i++) {
 207       __DRIbuffer *buf = &buffers[i];
 208       enum st_attachment_type statt;
 209       enum pipe_format format;
 210
 211       switch (buf->attachment) {
 212       case __DRI_BUFFER_FRONT_LEFT:
 213          if (!screen->auto_fake_front) {
 214             statt = ST_ATTACHMENT_INVALID;
 215             break;
 216          }
 217          /* fallthrough */
 218       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 219          statt = ST_ATTACHMENT_FRONT_LEFT;
 220          break;
 221       case __DRI_BUFFER_BACK_LEFT:
 222          statt = ST_ATTACHMENT_BACK_LEFT;
 223          break;
 224       case __DRI_BUFFER_DEPTH:
 225       case __DRI_BUFFER_DEPTH_STENCIL:
 226       case __DRI_BUFFER_STENCIL:
 227          /* use only the first depth/stencil buffer */
 228          if (!have_depth) {
 229             have_depth = TRUE;
 230             statt = ST_ATTACHMENT_DEPTH_STENCIL;
 231          }
 232          else {
 233             statt = ST_ATTACHMENT_INVALID;
 234          }
 235          break;
 236       default:
 237          statt = ST_ATTACHMENT_INVALID;
 238          break;
 239       }
 240
 241       dri_drawable_get_format(drawable, statt, &format, &bind);
 242       if (statt == ST_ATTACHMENT_INVALID || format == PIPE_FORMAT_NONE)
 243          continue;
 244
 245       templ.format = format;
 246       templ.bind = bind;
 247       whandle.handle = buf->name;
 248       whandle.stride = buf->pitch;
 249
 250       drawable->textures[statt] =
 251          screen->base.screen->resource_from_handle(screen->base.screen,
 252                &templ, &whandle);
 253    }
 254
 255    drawable->old_num = count;
 256    drawable->old_w = dri_drawable->w;
 257    drawable->old_h = dri_drawable->h;
 258    memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
 259 }
 260
 261 static __DRIbuffer *
 262 dri2_allocate_buffer(__DRIscreen *sPriv,
 263                      unsigned attachment, unsigned format,
 264                      int width, int height)
 265 {
 266    struct dri_screen *screen = dri_screen(sPriv);
 267    struct dri2_buffer *buffer;
 268    struct pipe_resource templ;
 269    enum pipe_format pf;
 270    unsigned bind = 0;
 271    struct winsys_handle whandle;
 272
 273    switch (attachment) {
 274       case __DRI_BUFFER_FRONT_LEFT:
 275       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 276          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 277          break;
 278       case __DRI_BUFFER_BACK_LEFT:
 279          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 280          break;
 281       case __DRI_BUFFER_DEPTH:
 282       case __DRI_BUFFER_DEPTH_STENCIL:
 283       case __DRI_BUFFER_STENCIL:
 284             bind = PIPE_BIND_DEPTH_STENCIL; /* XXX sampler? */
 285          break;
 286    }
 287
 288    switch (format) {
 289       case 32:
 290          pf = PIPE_FORMAT_B8G8R8X8_UNORM;
 291          break;
 292       case 16:
 293          pf = PIPE_FORMAT_Z16_UNORM;
 294          break;
 295       default:
 296          return NULL;
 297    }
 298
 299    buffer = CALLOC_STRUCT(dri2_buffer);
 300    if (!buffer)
 301       return NULL;
 302
 303    memset(&templ, 0, sizeof(templ));
 304    templ.bind = bind;
 305    templ.format = pf;
 306    templ.target = PIPE_TEXTURE_2D;
 307    templ.last_level = 0;
 308    templ.width0 = width;
 309    templ.height0 = height;
 310    templ.depth0 = 1;
 311    templ.array_size = 1;
 312
 313    buffer->resource =
 314       screen->base.screen->resource_create(screen->base.screen, &templ);
 315    if (!buffer->resource)
 316       return NULL;
 317
 318    memset(&whandle, 0, sizeof(whandle));
 319    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 320    screen->base.screen->resource_get_handle(screen->base.screen,
 321          buffer->resource, &whandle);
 322
 323    buffer->base.attachment = attachment;
 324    buffer->base.name = whandle.handle;
 325    buffer->base.cpp = util_format_get_blocksize(pf);
 326    buffer->base.pitch = whandle.stride;
 327
 328    return &buffer->base;
 329 }
 330
 331 static void
 332 dri2_release_buffer(__DRIscreen *sPriv, __DRIbuffer *bPriv)
 333 {
 334    struct dri2_buffer *buffer = dri2_buffer(bPriv);
 335
 336    pipe_resource_reference(&buffer->resource, NULL);
 337    FREE(buffer);
 338 }
 339
 340 /*
 341  * Backend functions for st_framebuffer interface.
 342  */
 343
 344 static void
 345 dri2_allocate_textures(struct dri_drawable *drawable,
 346                        const enum st_attachment_type *statts,
 347                        unsigned count)
 348 {
 349    __DRIbuffer *buffers;
 350    unsigned num_buffers = count;
 351
 352    buffers = dri2_drawable_get_buffers(drawable, statts, &num_buffers);
 353    if (buffers)
 354       dri2_drawable_process_buffers(drawable, buffers, num_buffers);
 355 }
 356
 357 static void
 358 dri2_flush_frontbuffer(struct dri_drawable *drawable,
 359                        enum st_attachment_type statt)
 360 {
 361    __DRIdrawable *dri_drawable = drawable->dPriv;
 362    struct __DRIdri2LoaderExtensionRec *loader = drawable->sPriv->dri2.loader;
 363
 364    if (loader->flushFrontBuffer == NULL)
 365       return;
 366
 367    if (statt == ST_ATTACHMENT_FRONT_LEFT) {
 368       loader->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 369    }
 370 }
 371
 372 static __DRIimage *
 373 dri2_lookup_egl_image(struct dri_screen *screen, void *handle)
 374 {
 375    __DRIimageLookupExtension *loader = screen->sPriv->dri2.image;
 376    __DRIimage *img;
 377
 378    if (!loader->lookupEGLImage)
 379       return NULL;
 380
 381    img = loader->lookupEGLImage(screen->sPriv,
 382                                 handle, screen->sPriv->loaderPrivate);
 383
 384    return img;
 385 }
 386
 387 static __DRIimage *
 388 dri2_create_image_from_name(__DRIscreen *_screen,
 389                             int width, int height, int format,
 390                             int name, int pitch, void *loaderPrivate)
 391 {
 392    struct dri_screen *screen = dri_screen(_screen);
 393    __DRIimage *img;
 394    struct pipe_resource templ;
 395    struct winsys_handle whandle;
 396    unsigned tex_usage;
 397    enum pipe_format pf;
 398
 399    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 400
 401    switch (format) {
 402    case __DRI_IMAGE_FORMAT_RGB565:
 403       pf = PIPE_FORMAT_B5G6R5_UNORM;
 404       break;
 405    case __DRI_IMAGE_FORMAT_XRGB8888:
 406       pf = PIPE_FORMAT_B8G8R8X8_UNORM;
 407       break;
 408    case __DRI_IMAGE_FORMAT_ARGB8888:
 409       pf = PIPE_FORMAT_B8G8R8A8_UNORM;
 410       break;
 411    default:
 412       pf = PIPE_FORMAT_NONE;
 413       break;
 414    }
 415    if (pf == PIPE_FORMAT_NONE)
 416       return NULL;
 417
 418    img = CALLOC_STRUCT(__DRIimageRec);
 419    if (!img)
 420       return NULL;
 421
 422    memset(&templ, 0, sizeof(templ));
 423    templ.bind = tex_usage;
 424    templ.format = pf;
 425    templ.target = screen->target;
 426    templ.last_level = 0;
 427    templ.width0 = width;
 428    templ.height0 = height;
 429    templ.depth0 = 1;
 430    templ.array_size = 1;
 431
 432    memset(&whandle, 0, sizeof(whandle));
 433    whandle.handle = name;
 434    whandle.stride = pitch * util_format_get_blocksize(pf);
 435
 436    img->texture = screen->base.screen->resource_from_handle(screen->base.screen,
 437          &templ, &whandle);
 438    if (!img->texture) {
 439       FREE(img);
 440       return NULL;
 441    }
 442
 443    img->level = 0;
 444    img->layer = 0;
 445    img->loader_private = loaderPrivate;
 446
 447    return img;
 448 }
 449
 450 static __DRIimage *
 451 dri2_create_image_from_renderbuffer(__DRIcontext *context,
 452                                     int renderbuffer, void *loaderPrivate)
 453 {
 454    struct dri_context *ctx = dri_context(context);
 455
 456    if (!ctx->st->get_resource_for_egl_image)
 457       return NULL;
 458
 459    /* TODO */
 460    return NULL;
 461 }
 462
 463 static __DRIimage *
 464 dri2_create_image(__DRIscreen *_screen,
 465                    int width, int height, int format,
 466                    unsigned int use, void *loaderPrivate)
 467 {
 468    struct dri_screen *screen = dri_screen(_screen);
 469    __DRIimage *img;
 470    struct pipe_resource templ;
 471    unsigned tex_usage;
 472    enum pipe_format pf;
 473
 474    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 475    if (use & __DRI_IMAGE_USE_SCANOUT)
 476       tex_usage |= PIPE_BIND_SCANOUT;
 477    if (use & __DRI_IMAGE_USE_SHARE)
 478       tex_usage |= PIPE_BIND_SHARED;
 479    if (use & __DRI_IMAGE_USE_CURSOR) {
 480       if (width != 64 || height != 64)
 481          return NULL;
 482       tex_usage |= PIPE_BIND_CURSOR;
 483    }
 484
 485    switch (format) {
 486    case __DRI_IMAGE_FORMAT_RGB565:
 487       pf = PIPE_FORMAT_B5G6R5_UNORM;
 488       break;
 489    case __DRI_IMAGE_FORMAT_XRGB8888:
 490       pf = PIPE_FORMAT_B8G8R8X8_UNORM;
 491       break;
 492    case __DRI_IMAGE_FORMAT_ARGB8888:
 493       pf = PIPE_FORMAT_B8G8R8A8_UNORM;
 494       break;
 495    default:
 496       pf = PIPE_FORMAT_NONE;
 497       break;
 498    }
 499    if (pf == PIPE_FORMAT_NONE)
 500       return NULL;
 501
 502    img = CALLOC_STRUCT(__DRIimageRec);
 503    if (!img)
 504       return NULL;
 505
 506    memset(&templ, 0, sizeof(templ));
 507    templ.bind = tex_usage;
 508    templ.format = pf;
 509    templ.target = PIPE_TEXTURE_2D;
 510    templ.last_level = 0;
 511    templ.width0 = width;
 512    templ.height0 = height;
 513    templ.depth0 = 1;
 514    templ.array_size = 1;
 515
 516    img->texture = screen->base.screen->resource_create(screen->base.screen, &templ);
 517    if (!img->texture) {
 518       FREE(img);
 519       return NULL;
 520    }
 521
 522    img->level = 0;
 523    img->layer = 0;
 524
 525    img->loader_private = loaderPrivate;
 526    return img;
 527 }
 528
 529 static GLboolean
 530 dri2_query_image(__DRIimage *image, int attrib, int *value)
 531 {
 532    struct winsys_handle whandle;
 533    memset(&whandle, 0, sizeof(whandle));
 534
 535    switch (attrib) {
 536    case __DRI_IMAGE_ATTRIB_STRIDE:
 537       image->texture->screen->resource_get_handle(image->texture->screen,
 538             image->texture, &whandle);
 539       *value = whandle.stride;
 540       return GL_TRUE;
 541    case __DRI_IMAGE_ATTRIB_HANDLE:
 542       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 543       image->texture->screen->resource_get_handle(image->texture->screen,
 544          image->texture, &whandle);
 545       *value = whandle.handle;
 546       return GL_TRUE;
 547    case __DRI_IMAGE_ATTRIB_NAME:
 548       whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 549       image->texture->screen->resource_get_handle(image->texture->screen,
 550          image->texture, &whandle);
 551       *value = whandle.handle;
 552       return GL_TRUE;
 553    default:
 554       return GL_FALSE;
 555    }
 556 }
 557
 558 static __DRIimage *
 559 dri2_dup_image(__DRIimage *image, void *loaderPrivate)
 560 {
 561    __DRIimage *img;
 562
 563    img = CALLOC_STRUCT(__DRIimageRec);
 564    if (!img)
 565       return NULL;
 566
 567    img->texture = NULL;
 568    pipe_resource_reference(&img->texture, image->texture);
 569    img->level = image->level;
 570    img->layer = image->layer;
 571    img->loader_private = loaderPrivate;
 572
 573    return img;
 574 }
 575
 576 static void
 577 dri2_destroy_image(__DRIimage *img)
 578 {
 579    pipe_resource_reference(&img->texture, NULL);
 580    FREE(img);
 581 }
 582
 583 static struct __DRIimageExtensionRec dri2ImageExtension = {
 584     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 585     dri2_create_image_from_name,
 586     dri2_create_image_from_renderbuffer,
 587     dri2_destroy_image,
 588     dri2_create_image,
 589     dri2_query_image,
 590     dri2_dup_image,
 591 };
 592
 593 /*
 594  * Backend function init_screen.
 595  */
 596
 597 static const __DRIextension *dri_screen_extensions[] = {
 598    &driReadDrawableExtension,
 599    &driCopySubBufferExtension.base,
 600    &driSwapControlExtension.base,
 601    &driMediaStreamCounterExtension.base,
 602    &driTexBufferExtension.base,
 603    &dri2FlushExtension.base,
 604    &dri2ImageExtension.base,
 605    &dri2ConfigQueryExtension.base,
 606    NULL
 607 };
 608
 609 /**
 610  * This is the driver specific part of the createNewScreen entry point.
 611  *
 612  * Returns the struct gl_config supported by this driver.
 613  */
 614 static const __DRIconfig **
 615 dri2_init_screen(__DRIscreen * sPriv)
 616 {
 617    const __DRIconfig **configs;
 618    struct dri_screen *screen;
 619    struct pipe_screen *pscreen;
 620
 621    screen = CALLOC_STRUCT(dri_screen);
 622    if (!screen)
 623       return NULL;
 624
 625    screen->sPriv = sPriv;
 626    screen->fd = sPriv->fd;
 627
 628    sPriv->private = (void *)screen;
 629    sPriv->extensions = dri_screen_extensions;
 630
 631    pscreen = driver_descriptor.create_screen(screen->fd);
 632    /* dri_init_screen_helper checks pscreen for us */
 633
 634    configs = dri_init_screen_helper(screen, pscreen, 32);
 635    if (!configs)
 636       goto fail;
 637
 638    sPriv->api_mask = 0;
 639    if (screen->st_api->profile_mask & ST_PROFILE_DEFAULT_MASK)
 640       sPriv->api_mask |= 1 << __DRI_API_OPENGL;
 641    if (screen->st_api->profile_mask & ST_PROFILE_OPENGL_ES1_MASK)
 642       sPriv->api_mask |= 1 << __DRI_API_GLES;
 643    if (screen->st_api->profile_mask & ST_PROFILE_OPENGL_ES2_MASK)
 644       sPriv->api_mask |= 1 << __DRI_API_GLES2;
 645
 646    screen->auto_fake_front = dri_with_format(sPriv);
 647    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
 648    screen->lookup_egl_image = dri2_lookup_egl_image;
 649
 650    return configs;
 651 fail:
 652    dri_destroy_screen_helper(screen);
 653    FREE(screen);
 654    return NULL;
 655 }
 656
 657 static boolean
 658 dri2_create_buffer(__DRIscreen * sPriv,
 659                    __DRIdrawable * dPriv,
 660                    const struct gl_config * visual, boolean isPixmap)
 661 {
 662    struct dri_drawable *drawable = NULL;
 663
 664    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
 665       return FALSE;
 666
 667    drawable = dPriv->driverPrivate;
 668
 669    drawable->allocate_textures = dri2_allocate_textures;
 670    drawable->flush_frontbuffer = dri2_flush_frontbuffer;
 671
 672    return TRUE;
 673 }
 674
 675 /**
 676  * DRI driver virtual function table.
 677  *
 678  * DRI versions differ in their implementation of init_screen and swap_buffers.
 679  */
 680 const struct __DriverAPIRec driDriverAPI = {
 681    .InitScreen = NULL,
 682    .InitScreen2 = dri2_init_screen,
 683    .DestroyScreen = dri_destroy_screen,
 684    .CreateContext = dri_create_context,
 685    .DestroyContext = dri_destroy_context,
 686    .CreateBuffer = dri2_create_buffer,
 687    .DestroyBuffer = dri_destroy_buffer,
 688    .MakeCurrent = dri_make_current,
 689    .UnbindContext = dri_unbind_context,
 690
 691    .GetSwapInfo = NULL,
 692    .GetDrawableMSC = NULL,
 693    .WaitForMSC = NULL,
 694
 695    .SwapBuffers = NULL,
 696    .CopySubBuffer = NULL,
 697
 698    .AllocateBuffer = dri2_allocate_buffer,
 699    .ReleaseBuffer  = dri2_release_buffer,
 700 };
 701
 702 /* This is the table of extensions that the loader will dlsym() for. */
 703 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 704     &driCoreExtension.base,
 705     &driLegacyExtension.base,
 706     &driDRI2Extension.base,
 707     NULL
 708 };
 709
 710 /* vim: set sw=3 ts=8 sts=3 expandtab: */