src/gallium/state_trackers/dri/dri2.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright 2009, VMware, Inc.
   5  * All Rights Reserved.
   6  * Copyright (C) 2010 LunarG Inc.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions 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 MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  * OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Keith Whitwell <keithw@vmware.com> Jakob Bornecrantz
  28  *    <wallbraker@gmail.com> Chia-I Wu <olv@lunarg.com>
  29  */
  30
  31 #include <xf86drm.h>
  32 #include <dlfcn.h>
  33 #include "GL/mesa_glinterop.h"
  34 #include "util/u_memory.h"
  35 #include "util/u_inlines.h"
  36 #include "util/u_format.h"
  37 #include "util/u_debug.h"
  38 #include "state_tracker/drm_driver.h"
  39 #include "state_tracker/st_cb_bufferobjects.h"
  40 #include "state_tracker/st_cb_fbo.h"
  41 #include "state_tracker/st_cb_texture.h"
  42 #include "state_tracker/st_texture.h"
  43 #include "state_tracker/st_context.h"
  44 #include "pipe-loader/pipe_loader.h"
  45 #include "main/bufferobj.h"
  46 #include "main/texobj.h"
  47
  48 #include "dri_screen.h"
  49 #include "dri_context.h"
  50 #include "dri_drawable.h"
  51 #include "dri_query_renderer.h"
  52 #include "dri2_buffer.h"
  53
  54 static int convert_fourcc(int format, int *dri_components_p)
  55 {
  56    int dri_components;
  57    switch(format) {
  58    case __DRI_IMAGE_FOURCC_RGB565:
  59       format = __DRI_IMAGE_FORMAT_RGB565;
  60       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  61       break;
  62    case __DRI_IMAGE_FOURCC_ARGB8888:
  63       format = __DRI_IMAGE_FORMAT_ARGB8888;
  64       dri_components = __DRI_IMAGE_COMPONENTS_RGBA;
  65       break;
  66    case __DRI_IMAGE_FOURCC_XRGB8888:
  67       format = __DRI_IMAGE_FORMAT_XRGB8888;
  68       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  69       break;
  70    case __DRI_IMAGE_FOURCC_ABGR8888:
  71       format = __DRI_IMAGE_FORMAT_ABGR8888;
  72       dri_components = __DRI_IMAGE_COMPONENTS_RGBA;
  73       break;
  74    case __DRI_IMAGE_FOURCC_XBGR8888:
  75       format = __DRI_IMAGE_FORMAT_XBGR8888;
  76       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  77       break;
  78    default:
  79       return -1;
  80    }
  81    *dri_components_p = dri_components;
  82    return format;
  83 }
  84
  85 static int convert_to_fourcc(int format)
  86 {
  87    switch(format) {
  88    case __DRI_IMAGE_FORMAT_RGB565:
  89       format = __DRI_IMAGE_FOURCC_RGB565;
  90       break;
  91    case __DRI_IMAGE_FORMAT_ARGB8888:
  92       format = __DRI_IMAGE_FOURCC_ARGB8888;
  93       break;
  94    case __DRI_IMAGE_FORMAT_XRGB8888:
  95       format = __DRI_IMAGE_FOURCC_XRGB8888;
  96       break;
  97    case __DRI_IMAGE_FORMAT_ABGR8888:
  98       format = __DRI_IMAGE_FOURCC_ABGR8888;
  99       break;
 100    case __DRI_IMAGE_FORMAT_XBGR8888:
 101       format = __DRI_IMAGE_FOURCC_XBGR8888;
 102       break;
 103    default:
 104       return -1;
 105    }
 106    return format;
 107 }
 108
 109 static enum pipe_format dri2_format_to_pipe_format (int format)
 110 {
 111    enum pipe_format pf;
 112
 113    switch (format) {
 114    case __DRI_IMAGE_FORMAT_RGB565:
 115       pf = PIPE_FORMAT_B5G6R5_UNORM;
 116       break;
 117    case __DRI_IMAGE_FORMAT_XRGB8888:
 118       pf = PIPE_FORMAT_BGRX8888_UNORM;
 119       break;
 120    case __DRI_IMAGE_FORMAT_ARGB8888:
 121       pf = PIPE_FORMAT_BGRA8888_UNORM;
 122       break;
 123    case __DRI_IMAGE_FORMAT_ABGR8888:
 124       pf = PIPE_FORMAT_RGBA8888_UNORM;
 125       break;
 126    default:
 127       pf = PIPE_FORMAT_NONE;
 128       break;
 129    }
 130
 131    return pf;
 132 }
 133
 134 /**
 135  * DRI2 flush extension.
 136  */
 137 static void
 138 dri2_flush_drawable(__DRIdrawable *dPriv)
 139 {
 140    dri_flush(dPriv->driContextPriv, dPriv, __DRI2_FLUSH_DRAWABLE, -1);
 141 }
 142
 143 static void
 144 dri2_invalidate_drawable(__DRIdrawable *dPriv)
 145 {
 146    struct dri_drawable *drawable = dri_drawable(dPriv);
 147
 148    dri2InvalidateDrawable(dPriv);
 149    drawable->dPriv->lastStamp = drawable->dPriv->dri2.stamp;
 150
 151    p_atomic_inc(&drawable->base.stamp);
 152 }
 153
 154 static const __DRI2flushExtension dri2FlushExtension = {
 155     .base = { __DRI2_FLUSH, 4 },
 156
 157     .flush                = dri2_flush_drawable,
 158     .invalidate           = dri2_invalidate_drawable,
 159     .flush_with_flags     = dri_flush,
 160 };
 161
 162 /**
 163  * Retrieve __DRIbuffer from the DRI loader.
 164  */
 165 static __DRIbuffer *
 166 dri2_drawable_get_buffers(struct dri_drawable *drawable,
 167                           const enum st_attachment_type *atts,
 168                           unsigned *count)
 169 {
 170    __DRIdrawable *dri_drawable = drawable->dPriv;
 171    const __DRIdri2LoaderExtension *loader = drawable->sPriv->dri2.loader;
 172    boolean with_format;
 173    __DRIbuffer *buffers;
 174    int num_buffers;
 175    unsigned attachments[10];
 176    unsigned num_attachments, i;
 177
 178    assert(loader);
 179    with_format = dri_with_format(drawable->sPriv);
 180
 181    num_attachments = 0;
 182
 183    /* for Xserver 1.6.0 (DRI2 version 1) we always need to ask for the front */
 184    if (!with_format)
 185       attachments[num_attachments++] = __DRI_BUFFER_FRONT_LEFT;
 186
 187    for (i = 0; i < *count; i++) {
 188       enum pipe_format format;
 189       unsigned bind;
 190       int att, depth;
 191
 192       dri_drawable_get_format(drawable, atts[i], &format, &bind);
 193       if (format == PIPE_FORMAT_NONE)
 194          continue;
 195
 196       switch (atts[i]) {
 197       case ST_ATTACHMENT_FRONT_LEFT:
 198          /* already added */
 199          if (!with_format)
 200             continue;
 201          att = __DRI_BUFFER_FRONT_LEFT;
 202          break;
 203       case ST_ATTACHMENT_BACK_LEFT:
 204          att = __DRI_BUFFER_BACK_LEFT;
 205          break;
 206       case ST_ATTACHMENT_FRONT_RIGHT:
 207          att = __DRI_BUFFER_FRONT_RIGHT;
 208          break;
 209       case ST_ATTACHMENT_BACK_RIGHT:
 210          att = __DRI_BUFFER_BACK_RIGHT;
 211          break;
 212       default:
 213          continue;
 214       }
 215
 216       /*
 217        * In this switch statement we must support all formats that
 218        * may occur as the stvis->color_format.
 219        */
 220       switch(format) {
 221       case PIPE_FORMAT_BGRA8888_UNORM:
 222          depth = 32;
 223          break;
 224       case PIPE_FORMAT_BGRX8888_UNORM:
 225          depth = 24;
 226          break;
 227       case PIPE_FORMAT_B5G6R5_UNORM:
 228          depth = 16;
 229          break;
 230       default:
 231          depth = util_format_get_blocksizebits(format);
 232          assert(!"Unexpected format in dri2_drawable_get_buffers()");
 233       }
 234
 235       attachments[num_attachments++] = att;
 236       if (with_format) {
 237          attachments[num_attachments++] = depth;
 238       }
 239    }
 240
 241    if (with_format) {
 242       num_attachments /= 2;
 243       buffers = loader->getBuffersWithFormat(dri_drawable,
 244             &dri_drawable->w, &dri_drawable->h,
 245             attachments, num_attachments,
 246             &num_buffers, dri_drawable->loaderPrivate);
 247    }
 248    else {
 249       buffers = loader->getBuffers(dri_drawable,
 250             &dri_drawable->w, &dri_drawable->h,
 251             attachments, num_attachments,
 252             &num_buffers, dri_drawable->loaderPrivate);
 253    }
 254
 255    if (buffers)
 256       *count = num_buffers;
 257
 258    return buffers;
 259 }
 260
 261 static bool
 262 dri_image_drawable_get_buffers(struct dri_drawable *drawable,
 263                                struct __DRIimageList *images,
 264                                const enum st_attachment_type *statts,
 265                                unsigned statts_count)
 266 {
 267    __DRIdrawable *dPriv = drawable->dPriv;
 268    __DRIscreen *sPriv = drawable->sPriv;
 269    unsigned int image_format = __DRI_IMAGE_FORMAT_NONE;
 270    enum pipe_format pf;
 271    uint32_t buffer_mask = 0;
 272    unsigned i, bind;
 273
 274    for (i = 0; i < statts_count; i++) {
 275       dri_drawable_get_format(drawable, statts[i], &pf, &bind);
 276       if (pf == PIPE_FORMAT_NONE)
 277          continue;
 278
 279       switch (statts[i]) {
 280       case ST_ATTACHMENT_FRONT_LEFT:
 281          buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
 282          break;
 283       case ST_ATTACHMENT_BACK_LEFT:
 284          buffer_mask |= __DRI_IMAGE_BUFFER_BACK;
 285          break;
 286       default:
 287          continue;
 288       }
 289
 290       switch (pf) {
 291       case PIPE_FORMAT_B5G6R5_UNORM:
 292          image_format = __DRI_IMAGE_FORMAT_RGB565;
 293          break;
 294       case PIPE_FORMAT_BGRX8888_UNORM:
 295          image_format = __DRI_IMAGE_FORMAT_XRGB8888;
 296          break;
 297       case PIPE_FORMAT_BGRA8888_UNORM:
 298          image_format = __DRI_IMAGE_FORMAT_ARGB8888;
 299          break;
 300       case PIPE_FORMAT_RGBA8888_UNORM:
 301          image_format = __DRI_IMAGE_FORMAT_ABGR8888;
 302          break;
 303       default:
 304          image_format = __DRI_IMAGE_FORMAT_NONE;
 305          break;
 306       }
 307    }
 308
 309    return (*sPriv->image.loader->getBuffers) (dPriv, image_format,
 310                                        (uint32_t *) &drawable->base.stamp,
 311                                        dPriv->loaderPrivate, buffer_mask,
 312                                        images);
 313 }
 314
 315 static __DRIbuffer *
 316 dri2_allocate_buffer(__DRIscreen *sPriv,
 317                      unsigned attachment, unsigned format,
 318                      int width, int height)
 319 {
 320    struct dri_screen *screen = dri_screen(sPriv);
 321    struct dri2_buffer *buffer;
 322    struct pipe_resource templ;
 323    enum pipe_format pf;
 324    unsigned bind = 0;
 325    struct winsys_handle whandle;
 326
 327    switch (attachment) {
 328       case __DRI_BUFFER_FRONT_LEFT:
 329       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 330          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 331          break;
 332       case __DRI_BUFFER_BACK_LEFT:
 333          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 334          break;
 335       case __DRI_BUFFER_DEPTH:
 336       case __DRI_BUFFER_DEPTH_STENCIL:
 337       case __DRI_BUFFER_STENCIL:
 338             bind = PIPE_BIND_DEPTH_STENCIL; /* XXX sampler? */
 339          break;
 340    }
 341
 342    /* because we get the handle and stride */
 343    bind |= PIPE_BIND_SHARED;
 344
 345    switch (format) {
 346       case 32:
 347          pf = PIPE_FORMAT_BGRA8888_UNORM;
 348          break;
 349       case 24:
 350          pf = PIPE_FORMAT_BGRX8888_UNORM;
 351          break;
 352       case 16:
 353          pf = PIPE_FORMAT_Z16_UNORM;
 354          break;
 355       default:
 356          return NULL;
 357    }
 358
 359    buffer = CALLOC_STRUCT(dri2_buffer);
 360    if (!buffer)
 361       return NULL;
 362
 363    memset(&templ, 0, sizeof(templ));
 364    templ.bind = bind;
 365    templ.format = pf;
 366    templ.target = PIPE_TEXTURE_2D;
 367    templ.last_level = 0;
 368    templ.width0 = width;
 369    templ.height0 = height;
 370    templ.depth0 = 1;
 371    templ.array_size = 1;
 372
 373    buffer->resource =
 374       screen->base.screen->resource_create(screen->base.screen, &templ);
 375    if (!buffer->resource) {
 376       FREE(buffer);
 377       return NULL;
 378    }
 379
 380    memset(&whandle, 0, sizeof(whandle));
 381    if (screen->can_share_buffer)
 382       whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 383    else
 384       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 385
 386    screen->base.screen->resource_get_handle(screen->base.screen,
 387          buffer->resource, &whandle,
 388          PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ);
 389
 390    buffer->base.attachment = attachment;
 391    buffer->base.name = whandle.handle;
 392    buffer->base.cpp = util_format_get_blocksize(pf);
 393    buffer->base.pitch = whandle.stride;
 394
 395    return &buffer->base;
 396 }
 397
 398 static void
 399 dri2_release_buffer(__DRIscreen *sPriv, __DRIbuffer *bPriv)
 400 {
 401    struct dri2_buffer *buffer = dri2_buffer(bPriv);
 402
 403    pipe_resource_reference(&buffer->resource, NULL);
 404    FREE(buffer);
 405 }
 406
 407 /*
 408  * Backend functions for st_framebuffer interface.
 409  */
 410
 411 static void
 412 dri2_allocate_textures(struct dri_context *ctx,
 413                        struct dri_drawable *drawable,
 414                        const enum st_attachment_type *statts,
 415                        unsigned statts_count)
 416 {
 417    __DRIscreen *sPriv = drawable->sPriv;
 418    __DRIdrawable *dri_drawable = drawable->dPriv;
 419    struct dri_screen *screen = dri_screen(sPriv);
 420    struct pipe_resource templ;
 421    boolean alloc_depthstencil = FALSE;
 422    unsigned i, j, bind;
 423    const __DRIimageLoaderExtension *image = sPriv->image.loader;
 424    /* Image specific variables */
 425    struct __DRIimageList images;
 426    /* Dri2 specific variables */
 427    __DRIbuffer *buffers = NULL;
 428    struct winsys_handle whandle;
 429    unsigned num_buffers = statts_count;
 430
 431    /* First get the buffers from the loader */
 432    if (image) {
 433       if (!dri_image_drawable_get_buffers(drawable, &images,
 434                                           statts, statts_count))
 435          return;
 436    }
 437    else {
 438       buffers = dri2_drawable_get_buffers(drawable, statts, &num_buffers);
 439       if (!buffers || (drawable->old_num == num_buffers &&
 440                        drawable->old_w == dri_drawable->w &&
 441                        drawable->old_h == dri_drawable->h &&
 442                        memcmp(drawable->old, buffers,
 443                               sizeof(__DRIbuffer) * num_buffers) == 0))
 444          return;
 445    }
 446
 447    /* Second clean useless resources*/
 448
 449    /* See if we need a depth-stencil buffer. */
 450    for (i = 0; i < statts_count; i++) {
 451       if (statts[i] == ST_ATTACHMENT_DEPTH_STENCIL) {
 452          alloc_depthstencil = TRUE;
 453          break;
 454       }
 455    }
 456
 457    /* Delete the resources we won't need. */
 458    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 459       /* Don't delete the depth-stencil buffer, we can reuse it. */
 460       if (i == ST_ATTACHMENT_DEPTH_STENCIL && alloc_depthstencil)
 461          continue;
 462
 463       /* Flush the texture before unreferencing, so that other clients can
 464        * see what the driver has rendered.
 465        */
 466       if (i != ST_ATTACHMENT_DEPTH_STENCIL && drawable->textures[i]) {
 467          struct pipe_context *pipe = ctx->st->pipe;
 468          pipe->flush_resource(pipe, drawable->textures[i]);
 469       }
 470
 471       pipe_resource_reference(&drawable->textures[i], NULL);
 472    }
 473
 474    if (drawable->stvis.samples > 1) {
 475       for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 476          boolean del = TRUE;
 477
 478          /* Don't delete MSAA resources for the attachments which are enabled,
 479           * we can reuse them. */
 480          for (j = 0; j < statts_count; j++) {
 481             if (i == statts[j]) {
 482                del = FALSE;
 483                break;
 484             }
 485          }
 486
 487          if (del) {
 488             pipe_resource_reference(&drawable->msaa_textures[i], NULL);
 489          }
 490       }
 491    }
 492
 493    /* Third use the buffers retrieved to fill the drawable info */
 494
 495    memset(&templ, 0, sizeof(templ));
 496    templ.target = screen->target;
 497    templ.last_level = 0;
 498    templ.depth0 = 1;
 499    templ.array_size = 1;
 500
 501    if (image) {
 502       if (images.image_mask & __DRI_IMAGE_BUFFER_FRONT) {
 503          struct pipe_resource **buf =
 504             &drawable->textures[ST_ATTACHMENT_FRONT_LEFT];
 505          struct pipe_resource *texture = images.front->texture;
 506
 507          dri_drawable->w = texture->width0;
 508          dri_drawable->h = texture->height0;
 509
 510          pipe_resource_reference(buf, texture);
 511       }
 512
 513       if (images.image_mask & __DRI_IMAGE_BUFFER_BACK) {
 514          struct pipe_resource **buf =
 515             &drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 516          struct pipe_resource *texture = images.back->texture;
 517
 518          dri_drawable->w = texture->width0;
 519          dri_drawable->h = texture->height0;
 520
 521          pipe_resource_reference(buf, texture);
 522       }
 523
 524       /* Note: if there is both a back and a front buffer,
 525        * then they have the same size.
 526        */
 527       templ.width0 = dri_drawable->w;
 528       templ.height0 = dri_drawable->h;
 529    }
 530    else {
 531       memset(&whandle, 0, sizeof(whandle));
 532
 533       /* Process DRI-provided buffers and get pipe_resources. */
 534       for (i = 0; i < num_buffers; i++) {
 535          __DRIbuffer *buf = &buffers[i];
 536          enum st_attachment_type statt;
 537          enum pipe_format format;
 538
 539          switch (buf->attachment) {
 540          case __DRI_BUFFER_FRONT_LEFT:
 541             if (!screen->auto_fake_front) {
 542                continue; /* invalid attachment */
 543             }
 544             /* fallthrough */
 545          case __DRI_BUFFER_FAKE_FRONT_LEFT:
 546             statt = ST_ATTACHMENT_FRONT_LEFT;
 547             break;
 548          case __DRI_BUFFER_BACK_LEFT:
 549             statt = ST_ATTACHMENT_BACK_LEFT;
 550             break;
 551          default:
 552             continue; /* invalid attachment */
 553          }
 554
 555          dri_drawable_get_format(drawable, statt, &format, &bind);
 556          if (format == PIPE_FORMAT_NONE)
 557             continue;
 558
 559          /* dri2_drawable_get_buffers has already filled dri_drawable->w
 560           * and dri_drawable->h */
 561          templ.width0 = dri_drawable->w;
 562          templ.height0 = dri_drawable->h;
 563          templ.format = format;
 564          templ.bind = bind;
 565          whandle.handle = buf->name;
 566          whandle.stride = buf->pitch;
 567          whandle.offset = 0;
 568          if (screen->can_share_buffer)
 569             whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 570          else
 571             whandle.type = DRM_API_HANDLE_TYPE_KMS;
 572          drawable->textures[statt] =
 573             screen->base.screen->resource_from_handle(screen->base.screen,
 574                   &templ, &whandle,
 575                   PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ);
 576          assert(drawable->textures[statt]);
 577       }
 578    }
 579
 580    /* Allocate private MSAA colorbuffers. */
 581    if (drawable->stvis.samples > 1) {
 582       for (i = 0; i < statts_count; i++) {
 583          enum st_attachment_type statt = statts[i];
 584
 585          if (statt == ST_ATTACHMENT_DEPTH_STENCIL)
 586             continue;
 587
 588          if (drawable->textures[statt]) {
 589             templ.format = drawable->textures[statt]->format;
 590             templ.bind = drawable->textures[statt]->bind & ~PIPE_BIND_SCANOUT;
 591             templ.nr_samples = drawable->stvis.samples;
 592
 593             /* Try to reuse the resource.
 594              * (the other resource parameters should be constant)
 595              */
 596             if (!drawable->msaa_textures[statt] ||
 597                 drawable->msaa_textures[statt]->width0 != templ.width0 ||
 598                 drawable->msaa_textures[statt]->height0 != templ.height0) {
 599                /* Allocate a new one. */
 600                pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 601
 602                drawable->msaa_textures[statt] =
 603                   screen->base.screen->resource_create(screen->base.screen,
 604                                                        &templ);
 605                assert(drawable->msaa_textures[statt]);
 606
 607                /* If there are any MSAA resources, we should initialize them
 608                 * such that they contain the same data as the single-sample
 609                 * resources we just got from the X server.
 610                 *
 611                 * The reason for this is that the state tracker (and
 612                 * therefore the app) can access the MSAA resources only.
 613                 * The single-sample resources are not exposed
 614                 * to the state tracker.
 615                 *
 616                 */
 617                dri_pipe_blit(ctx->st->pipe,
 618                              drawable->msaa_textures[statt],
 619                              drawable->textures[statt]);
 620             }
 621          }
 622          else {
 623             pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 624          }
 625       }
 626    }
 627
 628    /* Allocate a private depth-stencil buffer. */
 629    if (alloc_depthstencil) {
 630       enum st_attachment_type statt = ST_ATTACHMENT_DEPTH_STENCIL;
 631       struct pipe_resource **zsbuf;
 632       enum pipe_format format;
 633       unsigned bind;
 634
 635       dri_drawable_get_format(drawable, statt, &format, &bind);
 636
 637       if (format) {
 638          templ.format = format;
 639          templ.bind = bind;
 640
 641          if (drawable->stvis.samples > 1) {
 642             templ.nr_samples = drawable->stvis.samples;
 643             zsbuf = &drawable->msaa_textures[statt];
 644          }
 645          else {
 646             templ.nr_samples = 0;
 647             zsbuf = &drawable->textures[statt];
 648          }
 649
 650          /* Try to reuse the resource.
 651           * (the other resource parameters should be constant)
 652           */
 653          if (!*zsbuf ||
 654              (*zsbuf)->width0 != templ.width0 ||
 655              (*zsbuf)->height0 != templ.height0) {
 656             /* Allocate a new one. */
 657             pipe_resource_reference(zsbuf, NULL);
 658             *zsbuf = screen->base.screen->resource_create(screen->base.screen,
 659                                                           &templ);
 660             assert(*zsbuf);
 661          }
 662       }
 663       else {
 664          pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 665          pipe_resource_reference(&drawable->textures[statt], NULL);
 666       }
 667    }
 668
 669    /* For DRI2, we may get the same buffers again from the server.
 670     * To prevent useless imports of gem names, drawable->old* is used
 671     * to bypass the import if we get the same buffers. This doesn't apply
 672     * to DRI3/Wayland, users of image.loader, since the buffer is managed
 673     * by the client (no import), and the back buffer is going to change
 674     * at every redraw.
 675     */
 676    if (!image) {
 677       drawable->old_num = num_buffers;
 678       drawable->old_w = dri_drawable->w;
 679       drawable->old_h = dri_drawable->h;
 680       memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * num_buffers);
 681    }
 682 }
 683
 684 static void
 685 dri2_flush_frontbuffer(struct dri_context *ctx,
 686                        struct dri_drawable *drawable,
 687                        enum st_attachment_type statt)
 688 {
 689    __DRIdrawable *dri_drawable = drawable->dPriv;
 690    const __DRIimageLoaderExtension *image = drawable->sPriv->image.loader;
 691    const __DRIdri2LoaderExtension *loader = drawable->sPriv->dri2.loader;
 692    struct pipe_context *pipe = ctx->st->pipe;
 693
 694    if (statt != ST_ATTACHMENT_FRONT_LEFT)
 695       return;
 696
 697    if (drawable->stvis.samples > 1) {
 698       /* Resolve the front buffer. */
 699       dri_pipe_blit(ctx->st->pipe,
 700                     drawable->textures[ST_ATTACHMENT_FRONT_LEFT],
 701                     drawable->msaa_textures[ST_ATTACHMENT_FRONT_LEFT]);
 702    }
 703
 704    if (drawable->textures[ST_ATTACHMENT_FRONT_LEFT]) {
 705       pipe->flush_resource(pipe, drawable->textures[ST_ATTACHMENT_FRONT_LEFT]);
 706    }
 707
 708    pipe->flush(pipe, NULL, 0);
 709
 710    if (image) {
 711       image->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 712    }
 713    else if (loader->flushFrontBuffer) {
 714       loader->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 715    }
 716 }
 717
 718 static void
 719 dri2_update_tex_buffer(struct dri_drawable *drawable,
 720                        struct dri_context *ctx,
 721                        struct pipe_resource *res)
 722 {
 723    /* no-op */
 724 }
 725
 726 static __DRIimage *
 727 dri2_lookup_egl_image(struct dri_screen *screen, void *handle)
 728 {
 729    const __DRIimageLookupExtension *loader = screen->sPriv->dri2.image;
 730    __DRIimage *img;
 731
 732    if (!loader->lookupEGLImage)
 733       return NULL;
 734
 735    img = loader->lookupEGLImage(screen->sPriv,
 736                                 handle, screen->sPriv->loaderPrivate);
 737
 738    return img;
 739 }
 740
 741 static __DRIimage *
 742 dri2_create_image_from_winsys(__DRIscreen *_screen,
 743                               int width, int height, int format,
 744                               struct winsys_handle *whandle,
 745                               void *loaderPrivate)
 746 {
 747    struct dri_screen *screen = dri_screen(_screen);
 748    __DRIimage *img;
 749    struct pipe_resource templ;
 750    unsigned tex_usage;
 751    enum pipe_format pf;
 752
 753    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 754
 755    pf = dri2_format_to_pipe_format (format);
 756    if (pf == PIPE_FORMAT_NONE)
 757       return NULL;
 758
 759    img = CALLOC_STRUCT(__DRIimageRec);
 760    if (!img)
 761       return NULL;
 762
 763    memset(&templ, 0, sizeof(templ));
 764    templ.bind = tex_usage;
 765    templ.format = pf;
 766    templ.target = screen->target;
 767    templ.last_level = 0;
 768    templ.width0 = width;
 769    templ.height0 = height;
 770    templ.depth0 = 1;
 771    templ.array_size = 1;
 772
 773    whandle->offset = 0;
 774
 775    img->texture = screen->base.screen->resource_from_handle(screen->base.screen,
 776          &templ, whandle, PIPE_HANDLE_USAGE_READ_WRITE);
 777    if (!img->texture) {
 778       FREE(img);
 779       return NULL;
 780    }
 781
 782    img->level = 0;
 783    img->layer = 0;
 784    img->dri_format = format;
 785    img->use = 0;
 786    img->loader_private = loaderPrivate;
 787
 788    return img;
 789 }
 790
 791 static __DRIimage *
 792 dri2_create_image_from_name(__DRIscreen *_screen,
 793                             int width, int height, int format,
 794                             int name, int pitch, void *loaderPrivate)
 795 {
 796    struct winsys_handle whandle;
 797    enum pipe_format pf;
 798
 799    memset(&whandle, 0, sizeof(whandle));
 800    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 801    whandle.handle = name;
 802
 803    pf = dri2_format_to_pipe_format (format);
 804    if (pf == PIPE_FORMAT_NONE)
 805       return NULL;
 806
 807    whandle.stride = pitch * util_format_get_blocksize(pf);
 808
 809    return dri2_create_image_from_winsys(_screen, width, height, format,
 810                                         &whandle, loaderPrivate);
 811 }
 812
 813 static __DRIimage *
 814 dri2_create_image_from_fd(__DRIscreen *_screen,
 815                           int width, int height, int format,
 816                           int fd, int stride, void *loaderPrivate)
 817 {
 818    struct winsys_handle whandle;
 819
 820    if (fd < 0)
 821       return NULL;
 822
 823    memset(&whandle, 0, sizeof(whandle));
 824    whandle.type = DRM_API_HANDLE_TYPE_FD;
 825    whandle.handle = (unsigned)fd;
 826    whandle.stride = stride;
 827
 828    return dri2_create_image_from_winsys(_screen, width, height, format,
 829                                         &whandle, loaderPrivate);
 830 }
 831
 832 static __DRIimage *
 833 dri2_create_image_from_renderbuffer(__DRIcontext *context,
 834                                     int renderbuffer, void *loaderPrivate)
 835 {
 836    struct dri_context *ctx = dri_context(context);
 837
 838    if (!ctx->st->get_resource_for_egl_image)
 839       return NULL;
 840
 841    /* TODO */
 842    return NULL;
 843 }
 844
 845 static __DRIimage *
 846 dri2_create_image(__DRIscreen *_screen,
 847                    int width, int height, int format,
 848                    unsigned int use, void *loaderPrivate)
 849 {
 850    struct dri_screen *screen = dri_screen(_screen);
 851    __DRIimage *img;
 852    struct pipe_resource templ;
 853    unsigned tex_usage;
 854    enum pipe_format pf;
 855
 856    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 857    if (use & __DRI_IMAGE_USE_SCANOUT)
 858       tex_usage |= PIPE_BIND_SCANOUT;
 859    if (use & __DRI_IMAGE_USE_SHARE)
 860       tex_usage |= PIPE_BIND_SHARED;
 861    if (use & __DRI_IMAGE_USE_LINEAR)
 862       tex_usage |= PIPE_BIND_LINEAR;
 863    if (use & __DRI_IMAGE_USE_CURSOR) {
 864       if (width != 64 || height != 64)
 865          return NULL;
 866       tex_usage |= PIPE_BIND_CURSOR;
 867    }
 868
 869    pf = dri2_format_to_pipe_format (format);
 870    if (pf == PIPE_FORMAT_NONE)
 871       return NULL;
 872
 873    img = CALLOC_STRUCT(__DRIimageRec);
 874    if (!img)
 875       return NULL;
 876
 877    memset(&templ, 0, sizeof(templ));
 878    templ.bind = tex_usage;
 879    templ.format = pf;
 880    templ.target = PIPE_TEXTURE_2D;
 881    templ.last_level = 0;
 882    templ.width0 = width;
 883    templ.height0 = height;
 884    templ.depth0 = 1;
 885    templ.array_size = 1;
 886
 887    img->texture = screen->base.screen->resource_create(screen->base.screen, &templ);
 888    if (!img->texture) {
 889       FREE(img);
 890       return NULL;
 891    }
 892
 893    img->level = 0;
 894    img->layer = 0;
 895    img->dri_format = format;
 896    img->dri_components = 0;
 897    img->use = use;
 898
 899    img->loader_private = loaderPrivate;
 900    return img;
 901 }
 902
 903 static GLboolean
 904 dri2_query_image(__DRIimage *image, int attrib, int *value)
 905 {
 906    struct winsys_handle whandle;
 907    unsigned usage;
 908
 909    if (image->use & __DRI_IMAGE_USE_BACKBUFFER)
 910       usage = PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ;
 911    else
 912       usage = PIPE_HANDLE_USAGE_READ_WRITE;
 913
 914    memset(&whandle, 0, sizeof(whandle));
 915
 916    switch (attrib) {
 917    case __DRI_IMAGE_ATTRIB_STRIDE:
 918       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 919       image->texture->screen->resource_get_handle(image->texture->screen,
 920             image->texture, &whandle, usage);
 921       *value = whandle.stride;
 922       return GL_TRUE;
 923    case __DRI_IMAGE_ATTRIB_HANDLE:
 924       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 925       image->texture->screen->resource_get_handle(image->texture->screen,
 926          image->texture, &whandle, usage);
 927       *value = whandle.handle;
 928       return GL_TRUE;
 929    case __DRI_IMAGE_ATTRIB_NAME:
 930       whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 931       image->texture->screen->resource_get_handle(image->texture->screen,
 932          image->texture, &whandle, usage);
 933       *value = whandle.handle;
 934       return GL_TRUE;
 935    case __DRI_IMAGE_ATTRIB_FD:
 936       whandle.type= DRM_API_HANDLE_TYPE_FD;
 937       image->texture->screen->resource_get_handle(image->texture->screen,
 938          image->texture, &whandle, usage);
 939       *value = whandle.handle;
 940       return GL_TRUE;
 941    case __DRI_IMAGE_ATTRIB_FORMAT:
 942       *value = image->dri_format;
 943       return GL_TRUE;
 944    case __DRI_IMAGE_ATTRIB_WIDTH:
 945       *value = image->texture->width0;
 946       return GL_TRUE;
 947    case __DRI_IMAGE_ATTRIB_HEIGHT:
 948       *value = image->texture->height0;
 949       return GL_TRUE;
 950    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 951       if (image->dri_components == 0)
 952          return GL_FALSE;
 953       *value = image->dri_components;
 954       return GL_TRUE;
 955    case __DRI_IMAGE_ATTRIB_FOURCC:
 956       *value = convert_to_fourcc(image->dri_format);
 957       return GL_TRUE;
 958    case __DRI_IMAGE_ATTRIB_NUM_PLANES:
 959       *value = 1;
 960       return GL_TRUE;
 961    default:
 962       return GL_FALSE;
 963    }
 964 }
 965
 966 static __DRIimage *
 967 dri2_dup_image(__DRIimage *image, void *loaderPrivate)
 968 {
 969    __DRIimage *img;
 970
 971    img = CALLOC_STRUCT(__DRIimageRec);
 972    if (!img)
 973       return NULL;
 974
 975    img->texture = NULL;
 976    pipe_resource_reference(&img->texture, image->texture);
 977    img->level = image->level;
 978    img->layer = image->layer;
 979    img->dri_format = image->dri_format;
 980    /* This should be 0 for sub images, but dup is also used for base images. */
 981    img->dri_components = image->dri_components;
 982    img->loader_private = loaderPrivate;
 983
 984    return img;
 985 }
 986
 987 static GLboolean
 988 dri2_validate_usage(__DRIimage *image, unsigned int use)
 989 {
 990    /*
 991     * Gallium drivers are bad at adding usages to the resources
 992     * once opened again in another process, which is the main use
 993     * case for this, so we have to lie.
 994     */
 995    if (image != NULL)
 996       return GL_TRUE;
 997    else
 998       return GL_FALSE;
 999 }
1000
1001 static __DRIimage *
1002 dri2_from_names(__DRIscreen *screen, int width, int height, int format,
1003                 int *names, int num_names, int *strides, int *offsets,
1004                 void *loaderPrivate)
1005 {
1006    __DRIimage *img;
1007    int dri_components;
1008    struct winsys_handle whandle;
1009
1010    if (num_names != 1)
1011       return NULL;
1012    if (offsets[0] != 0)
1013       return NULL;
1014
1015    format = convert_fourcc(format, &dri_components);
1016    if (format == -1)
1017       return NULL;
1018
1019    memset(&whandle, 0, sizeof(whandle));
1020    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
1021    whandle.handle = names[0];
1022    whandle.stride = strides[0];
1023
1024    img = dri2_create_image_from_winsys(screen, width, height, format,
1025                                        &whandle, loaderPrivate);
1026    if (img == NULL)
1027       return NULL;
1028
1029    img->dri_components = dri_components;
1030    return img;
1031 }
1032
1033 static __DRIimage *
1034 dri2_from_planar(__DRIimage *image, int plane, void *loaderPrivate)
1035 {
1036    __DRIimage *img;
1037
1038    if (plane != 0)
1039       return NULL;
1040
1041    if (image->dri_components == 0)
1042       return NULL;
1043
1044    img = dri2_dup_image(image, loaderPrivate);
1045    if (img == NULL)
1046       return NULL;
1047
1048    /* set this to 0 for sub images. */
1049    img->dri_components = 0;
1050    return img;
1051 }
1052
1053 static __DRIimage *
1054 dri2_create_from_texture(__DRIcontext *context, int target, unsigned texture,
1055                          int depth, int level, unsigned *error,
1056                          void *loaderPrivate)
1057 {
1058    __DRIimage *img;
1059    struct gl_context *ctx = ((struct st_context *)dri_context(context)->st)->ctx;
1060    struct gl_texture_object *obj;
1061    struct pipe_resource *tex;
1062    GLuint face = 0;
1063
1064    obj = _mesa_lookup_texture(ctx, texture);
1065    if (!obj || obj->Target != target) {
1066       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1067       return NULL;
1068    }
1069
1070    tex = st_get_texobj_resource(obj);
1071    if (!tex) {
1072       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1073       return NULL;
1074    }
1075
1076    if (target == GL_TEXTURE_CUBE_MAP)
1077       face = depth;
1078
1079    _mesa_test_texobj_completeness(ctx, obj);
1080    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
1081       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1082       return NULL;
1083    }
1084
1085    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
1086       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1087       return NULL;
1088    }
1089
1090    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < depth) {
1091       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1092       return NULL;
1093    }
1094
1095    img = CALLOC_STRUCT(__DRIimageRec);
1096    if (!img) {
1097       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
1098       return NULL;
1099    }
1100
1101    img->level = level;
1102    img->layer = depth;
1103    img->dri_format = driGLFormatToImageFormat(obj->Image[face][level]->TexFormat);
1104
1105    img->loader_private = loaderPrivate;
1106
1107    if (img->dri_format == __DRI_IMAGE_FORMAT_NONE) {
1108       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1109       free(img);
1110       return NULL;
1111    }
1112
1113    pipe_resource_reference(&img->texture, tex);
1114
1115    *error = __DRI_IMAGE_ERROR_SUCCESS;
1116    return img;
1117 }
1118
1119 static __DRIimage *
1120 dri2_from_fds(__DRIscreen *screen, int width, int height, int fourcc,
1121               int *fds, int num_fds, int *strides, int *offsets,
1122               void *loaderPrivate)
1123 {
1124    __DRIimage *img;
1125    int format, dri_components;
1126
1127    if (num_fds != 1)
1128       return NULL;
1129    if (offsets[0] != 0)
1130       return NULL;
1131
1132    format = convert_fourcc(fourcc, &dri_components);
1133    if (format == -1)
1134       return NULL;
1135
1136    img = dri2_create_image_from_fd(screen, width, height, format,
1137                                    fds[0], strides[0], loaderPrivate);
1138    if (img == NULL)
1139       return NULL;
1140
1141    img->dri_components = dri_components;
1142    return img;
1143 }
1144
1145 static __DRIimage *
1146 dri2_from_dma_bufs(__DRIscreen *screen,
1147                    int width, int height, int fourcc,
1148                    int *fds, int num_fds,
1149                    int *strides, int *offsets,
1150                    enum __DRIYUVColorSpace yuv_color_space,
1151                    enum __DRISampleRange sample_range,
1152                    enum __DRIChromaSiting horizontal_siting,
1153                    enum __DRIChromaSiting vertical_siting,
1154                    unsigned *error,
1155                    void *loaderPrivate)
1156 {
1157    __DRIimage *img;
1158    int format, dri_components;
1159
1160    if (num_fds != 1 || offsets[0] != 0) {
1161       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1162       return NULL;
1163    }
1164
1165    format = convert_fourcc(fourcc, &dri_components);
1166    if (format == -1) {
1167       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1168       return NULL;
1169    }
1170
1171    img = dri2_create_image_from_fd(screen, width, height, format,
1172                                    fds[0], strides[0], loaderPrivate);
1173    if (img == NULL) {
1174       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
1175       return NULL;
1176    }
1177
1178    img->yuv_color_space = yuv_color_space;
1179    img->sample_range = sample_range;
1180    img->horizontal_siting = horizontal_siting;
1181    img->vertical_siting = vertical_siting;
1182    img->dri_components = dri_components;
1183
1184    *error = __DRI_IMAGE_ERROR_SUCCESS;
1185    return img;
1186 }
1187
1188 static void
1189 dri2_blit_image(__DRIcontext *context, __DRIimage *dst, __DRIimage *src,
1190                 int dstx0, int dsty0, int dstwidth, int dstheight,
1191                 int srcx0, int srcy0, int srcwidth, int srcheight,
1192                 int flush_flag)
1193 {
1194    struct dri_context *ctx = dri_context(context);
1195    struct pipe_context *pipe = ctx->st->pipe;
1196    struct pipe_screen *screen;
1197    struct pipe_fence_handle *fence;
1198    struct pipe_blit_info blit;
1199
1200    if (!dst || !src)
1201       return;
1202
1203    memset(&blit, 0, sizeof(blit));
1204    blit.dst.resource = dst->texture;
1205    blit.dst.box.x = dstx0;
1206    blit.dst.box.y = dsty0;
1207    blit.dst.box.width = dstwidth;
1208    blit.dst.box.height = dstheight;
1209    blit.dst.box.depth = 1;
1210    blit.dst.format = dst->texture->format;
1211    blit.src.resource = src->texture;
1212    blit.src.box.x = srcx0;
1213    blit.src.box.y = srcy0;
1214    blit.src.box.width = srcwidth;
1215    blit.src.box.height = srcheight;
1216    blit.src.box.depth = 1;
1217    blit.src.format = src->texture->format;
1218    blit.mask = PIPE_MASK_RGBA;
1219    blit.filter = PIPE_TEX_FILTER_NEAREST;
1220
1221    pipe->blit(pipe, &blit);
1222
1223    if (flush_flag == __BLIT_FLAG_FLUSH) {
1224       pipe->flush_resource(pipe, dst->texture);
1225       ctx->st->flush(ctx->st, 0, NULL);
1226    } else if (flush_flag == __BLIT_FLAG_FINISH) {
1227       screen = dri_screen(ctx->sPriv)->base.screen;
1228       pipe->flush_resource(pipe, dst->texture);
1229       ctx->st->flush(ctx->st, 0, &fence);
1230       (void) screen->fence_finish(screen, fence, PIPE_TIMEOUT_INFINITE);
1231       screen->fence_reference(screen, &fence, NULL);
1232    }
1233 }
1234
1235 static void *
1236 dri2_map_image(__DRIcontext *context, __DRIimage *image,
1237                 int x0, int y0, int width, int height,
1238                 unsigned int flags, int *stride, void **data)
1239 {
1240    struct dri_context *ctx = dri_context(context);
1241    struct pipe_context *pipe = ctx->st->pipe;
1242    enum pipe_transfer_usage pipe_access = 0;
1243    struct pipe_transfer *trans;
1244    void *map;
1245
1246    if (!image || !data || *data)
1247       return NULL;
1248
1249    if (flags & __DRI_IMAGE_TRANSFER_READ)
1250          pipe_access |= PIPE_TRANSFER_READ;
1251    if (flags & __DRI_IMAGE_TRANSFER_WRITE)
1252          pipe_access |= PIPE_TRANSFER_WRITE;
1253
1254    map = pipe_transfer_map(pipe, image->texture,
1255                            0, 0, pipe_access, x0, y0, width, height,
1256                            &trans);
1257    if (map) {
1258       *data = trans;
1259       *stride = trans->stride;
1260    }
1261
1262    return map;
1263 }
1264
1265 static void
1266 dri2_unmap_image(__DRIcontext *context, __DRIimage *image, void *data)
1267 {
1268    struct dri_context *ctx = dri_context(context);
1269    struct pipe_context *pipe = ctx->st->pipe;
1270
1271    pipe_transfer_unmap(pipe, (struct pipe_transfer *)data);
1272 }
1273
1274 static void
1275 dri2_destroy_image(__DRIimage *img)
1276 {
1277    pipe_resource_reference(&img->texture, NULL);
1278    FREE(img);
1279 }
1280
1281 static int
1282 dri2_get_capabilities(__DRIscreen *_screen)
1283 {
1284    struct dri_screen *screen = dri_screen(_screen);
1285
1286    return (screen->can_share_buffer ? __DRI_IMAGE_CAP_GLOBAL_NAMES : 0);
1287 }
1288
1289 /* The extension is modified during runtime if DRI_PRIME is detected */
1290 static __DRIimageExtension dri2ImageExtension = {
1291     .base = { __DRI_IMAGE, 12 },
1292
1293     .createImageFromName          = dri2_create_image_from_name,
1294     .createImageFromRenderbuffer  = dri2_create_image_from_renderbuffer,
1295     .destroyImage                 = dri2_destroy_image,
1296     .createImage                  = dri2_create_image,
1297     .queryImage                   = dri2_query_image,
1298     .dupImage                     = dri2_dup_image,
1299     .validateUsage                = dri2_validate_usage,
1300     .createImageFromNames         = dri2_from_names,
1301     .fromPlanar                   = dri2_from_planar,
1302     .createImageFromTexture       = dri2_create_from_texture,
1303     .createImageFromFds           = NULL,
1304     .createImageFromDmaBufs       = NULL,
1305     .blitImage                    = dri2_blit_image,
1306     .getCapabilities              = dri2_get_capabilities,
1307     .mapImage                     = dri2_map_image,
1308     .unmapImage                   = dri2_unmap_image,
1309 };
1310
1311
1312 static bool
1313 dri2_is_opencl_interop_loaded_locked(struct dri_screen *screen)
1314 {
1315    return screen->opencl_dri_event_add_ref &&
1316           screen->opencl_dri_event_release &&
1317           screen->opencl_dri_event_wait &&
1318           screen->opencl_dri_event_get_fence;
1319 }
1320
1321 static bool
1322 dri2_load_opencl_interop(struct dri_screen *screen)
1323 {
1324 #if defined(RTLD_DEFAULT)
1325    bool success;
1326
1327    pipe_mutex_lock(screen->opencl_func_mutex);
1328
1329    if (dri2_is_opencl_interop_loaded_locked(screen)) {
1330       pipe_mutex_unlock(screen->opencl_func_mutex);
1331       return true;
1332    }
1333
1334    screen->opencl_dri_event_add_ref =
1335       dlsym(RTLD_DEFAULT, "opencl_dri_event_add_ref");
1336    screen->opencl_dri_event_release =
1337       dlsym(RTLD_DEFAULT, "opencl_dri_event_release");
1338    screen->opencl_dri_event_wait =
1339       dlsym(RTLD_DEFAULT, "opencl_dri_event_wait");
1340    screen->opencl_dri_event_get_fence =
1341       dlsym(RTLD_DEFAULT, "opencl_dri_event_get_fence");
1342
1343    success = dri2_is_opencl_interop_loaded_locked(screen);
1344    pipe_mutex_unlock(screen->opencl_func_mutex);
1345    return success;
1346 #else
1347    return false;
1348 #endif
1349 }
1350
1351 struct dri2_fence {
1352    struct dri_screen *driscreen;
1353    struct pipe_fence_handle *pipe_fence;
1354    void *cl_event;
1355 };
1356
1357 static void *
1358 dri2_create_fence(__DRIcontext *_ctx)
1359 {
1360    struct pipe_context *ctx = dri_context(_ctx)->st->pipe;
1361    struct dri2_fence *fence = CALLOC_STRUCT(dri2_fence);
1362
1363    if (!fence)
1364       return NULL;
1365
1366    ctx->flush(ctx, &fence->pipe_fence, 0);
1367
1368    if (!fence->pipe_fence) {
1369       FREE(fence);
1370       return NULL;
1371    }
1372
1373    fence->driscreen = dri_screen(_ctx->driScreenPriv);
1374    return fence;
1375 }
1376
1377 static void *
1378 dri2_get_fence_from_cl_event(__DRIscreen *_screen, intptr_t cl_event)
1379 {
1380    struct dri_screen *driscreen = dri_screen(_screen);
1381    struct dri2_fence *fence;
1382
1383    if (!dri2_load_opencl_interop(driscreen))
1384       return NULL;
1385
1386    fence = CALLOC_STRUCT(dri2_fence);
1387    if (!fence)
1388       return NULL;
1389
1390    fence->cl_event = (void*)cl_event;
1391
1392    if (!driscreen->opencl_dri_event_add_ref(fence->cl_event)) {
1393       free(fence);
1394       return NULL;
1395    }
1396
1397    fence->driscreen = driscreen;
1398    return fence;
1399 }
1400
1401 static void
1402 dri2_destroy_fence(__DRIscreen *_screen, void *_fence)
1403 {
1404    struct dri_screen *driscreen = dri_screen(_screen);
1405    struct pipe_screen *screen = driscreen->base.screen;
1406    struct dri2_fence *fence = (struct dri2_fence*)_fence;
1407
1408    if (fence->pipe_fence)
1409       screen->fence_reference(screen, &fence->pipe_fence, NULL);
1410    else if (fence->cl_event)
1411       driscreen->opencl_dri_event_release(fence->cl_event);
1412    else
1413       assert(0);
1414
1415    FREE(fence);
1416 }
1417
1418 static GLboolean
1419 dri2_client_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags,
1420                       uint64_t timeout)
1421 {
1422    struct dri2_fence *fence = (struct dri2_fence*)_fence;
1423    struct dri_screen *driscreen = fence->driscreen;
1424    struct pipe_screen *screen = driscreen->base.screen;
1425
1426    /* No need to flush. The context was flushed when the fence was created. */
1427
1428    if (fence->pipe_fence)
1429       return screen->fence_finish(screen, fence->pipe_fence, timeout);
1430    else if (fence->cl_event) {
1431       struct pipe_fence_handle *pipe_fence =
1432          driscreen->opencl_dri_event_get_fence(fence->cl_event);
1433
1434       if (pipe_fence)
1435          return screen->fence_finish(screen, pipe_fence, timeout);
1436       else
1437          return driscreen->opencl_dri_event_wait(fence->cl_event, timeout);
1438    }
1439    else {
1440       assert(0);
1441       return false;
1442    }
1443 }
1444
1445 static void
1446 dri2_server_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags)
1447 {
1448    /* AFAIK, no driver currently supports parallel context execution. */
1449 }
1450
1451 static __DRI2fenceExtension dri2FenceExtension = {
1452    .base = { __DRI2_FENCE, 1 },
1453
1454    .create_fence = dri2_create_fence,
1455    .get_fence_from_cl_event = dri2_get_fence_from_cl_event,
1456    .destroy_fence = dri2_destroy_fence,
1457    .client_wait_sync = dri2_client_wait_sync,
1458    .server_wait_sync = dri2_server_wait_sync
1459 };
1460
1461 static const __DRIrobustnessExtension dri2Robustness = {
1462    .base = { __DRI2_ROBUSTNESS, 1 }
1463 };
1464
1465 static int
1466 dri2_interop_query_device_info(__DRIcontext *_ctx,
1467                                mesa_glinterop_device_info *out)
1468 {
1469    struct pipe_screen *screen = dri_context(_ctx)->st->pipe->screen;
1470
1471    if (!out->struct_version)
1472       return MESA_GLINTEROP_INVALID_VALUE;
1473
1474    out->pci_segment_group = screen->get_param(screen, PIPE_CAP_PCI_GROUP);
1475    out->pci_bus = screen->get_param(screen, PIPE_CAP_PCI_BUS);
1476    out->pci_device = screen->get_param(screen, PIPE_CAP_PCI_DEVICE);
1477    out->pci_function = screen->get_param(screen, PIPE_CAP_PCI_FUNCTION);
1478
1479    out->vendor_id = screen->get_param(screen, PIPE_CAP_VENDOR_ID);
1480    out->device_id = screen->get_param(screen, PIPE_CAP_DEVICE_ID);
1481
1482    out->interop_version = 1;
1483
1484    return MESA_GLINTEROP_SUCCESS;
1485 }
1486
1487 static int
1488 dri2_interop_export_object(__DRIcontext *_ctx,
1489                            const mesa_glinterop_export_in *in,
1490                            mesa_glinterop_export_out *out)
1491 {
1492    struct st_context_iface *st = dri_context(_ctx)->st;
1493    struct pipe_screen *screen = st->pipe->screen;
1494    struct gl_context *ctx = ((struct st_context *)st)->ctx;
1495    struct pipe_resource *res = NULL;
1496    struct winsys_handle whandle;
1497    unsigned target, usage;
1498    boolean success;
1499
1500    if (!in->struct_version || !out->struct_version)
1501       return MESA_GLINTEROP_INVALID_VALUE;
1502
1503    /* Validate the target. */
1504    switch (in->target) {
1505    case GL_TEXTURE_BUFFER:
1506    case GL_TEXTURE_1D:
1507    case GL_TEXTURE_2D:
1508    case GL_TEXTURE_3D:
1509    case GL_TEXTURE_RECTANGLE:
1510    case GL_TEXTURE_1D_ARRAY:
1511    case GL_TEXTURE_2D_ARRAY:
1512    case GL_TEXTURE_CUBE_MAP_ARRAY:
1513    case GL_TEXTURE_CUBE_MAP:
1514    case GL_TEXTURE_2D_MULTISAMPLE:
1515    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
1516    case GL_TEXTURE_EXTERNAL_OES:
1517    case GL_RENDERBUFFER:
1518    case GL_ARRAY_BUFFER:
1519       target = in->target;
1520       break;
1521    case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
1522    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
1523    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
1524    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
1525    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
1526    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
1527       target = GL_TEXTURE_CUBE_MAP;
1528       break;
1529    default:
1530       return MESA_GLINTEROP_INVALID_TARGET;
1531    }
1532
1533    /* Validate the simple case of miplevel. */
1534    if ((target == GL_RENDERBUFFER || target == GL_ARRAY_BUFFER) &&
1535        in->miplevel != 0)
1536       return MESA_GLINTEROP_INVALID_MIP_LEVEL;
1537
1538    /* Validate the OpenGL object and get pipe_resource. */
1539    mtx_lock(&ctx->Shared->Mutex);
1540
1541    if (target == GL_ARRAY_BUFFER) {
1542       /* Buffer objects.
1543        *
1544        * The error checking is based on the documentation of
1545        * clCreateFromGLBuffer from OpenCL 2.0 SDK.
1546        */
1547       struct gl_buffer_object *buf = _mesa_lookup_bufferobj(ctx, in->obj);
1548
1549       /* From OpenCL 2.0 SDK, clCreateFromGLBuffer:
1550        *  "CL_INVALID_GL_OBJECT if bufobj is not a GL buffer object or is
1551        *   a GL buffer object but does not have an existing data store or
1552        *   the size of the buffer is 0."
1553        */
1554       if (!buf || buf->Size == 0) {
1555          mtx_unlock(&ctx->Shared->Mutex);
1556          return MESA_GLINTEROP_INVALID_OBJECT;
1557       }
1558
1559       res = st_buffer_object(buf)->buffer;
1560       if (!res) {
1561          /* this shouldn't happen */
1562          mtx_unlock(&ctx->Shared->Mutex);
1563          return MESA_GLINTEROP_INVALID_OBJECT;
1564       }
1565
1566       out->buf_offset = 0;
1567       out->buf_size = buf->Size;
1568
1569       buf->UsageHistory |= USAGE_DISABLE_MINMAX_CACHE;
1570    } else if (target == GL_RENDERBUFFER) {
1571       /* Renderbuffers.
1572        *
1573        * The error checking is based on the documentation of
1574        * clCreateFromGLRenderbuffer from OpenCL 2.0 SDK.
1575        */
1576       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, in->obj);
1577
1578       /* From OpenCL 2.0 SDK, clCreateFromGLRenderbuffer:
1579        *   "CL_INVALID_GL_OBJECT if renderbuffer is not a GL renderbuffer
1580        *    object or if the width or height of renderbuffer is zero."
1581        */
1582       if (!rb || rb->Width == 0 || rb->Height == 0) {
1583          mtx_unlock(&ctx->Shared->Mutex);
1584          return MESA_GLINTEROP_INVALID_OBJECT;
1585       }
1586
1587       /* From OpenCL 2.0 SDK, clCreateFromGLRenderbuffer:
1588        *   "CL_INVALID_OPERATION if renderbuffer is a multi-sample GL
1589        *    renderbuffer object."
1590        */
1591       if (rb->NumSamples > 1) {
1592          mtx_unlock(&ctx->Shared->Mutex);
1593          return MESA_GLINTEROP_INVALID_OPERATION;
1594       }
1595
1596       /* From OpenCL 2.0 SDK, clCreateFromGLRenderbuffer:
1597        *   "CL_OUT_OF_RESOURCES if there is a failure to allocate resources
1598        *    required by the OpenCL implementation on the device."
1599        */
1600       res = st_renderbuffer(rb)->texture;
1601       if (!res) {
1602          mtx_unlock(&ctx->Shared->Mutex);
1603          return MESA_GLINTEROP_OUT_OF_RESOURCES;
1604       }
1605
1606       out->internalformat = rb->InternalFormat;
1607       out->view_minlevel = 0;
1608       out->view_numlevels = 1;
1609       out->view_minlayer = 0;
1610       out->view_numlayers = 1;
1611    } else {
1612       /* Texture objects.
1613        *
1614        * The error checking is based on the documentation of
1615        * clCreateFromGLTexture from OpenCL 2.0 SDK.
1616        */
1617       struct gl_texture_object *obj = _mesa_lookup_texture(ctx, in->obj);
1618
1619       if (obj)
1620          _mesa_test_texobj_completeness(ctx, obj);
1621
1622       /* From OpenCL 2.0 SDK, clCreateFromGLTexture:
1623        *   "CL_INVALID_GL_OBJECT if texture is not a GL texture object whose
1624        *    type matches texture_target, if the specified miplevel of texture
1625        *    is not defined, or if the width or height of the specified
1626        *    miplevel is zero or if the GL texture object is incomplete."
1627        */
1628       if (!obj ||
1629           obj->Target != target ||
1630           !obj->_BaseComplete ||
1631           (in->miplevel > 0 && !obj->_MipmapComplete)) {
1632          mtx_unlock(&ctx->Shared->Mutex);
1633          return MESA_GLINTEROP_INVALID_OBJECT;
1634       }
1635
1636       /* From OpenCL 2.0 SDK, clCreateFromGLTexture:
1637        *   "CL_INVALID_MIP_LEVEL if miplevel is less than the value of
1638        *    levelbase (for OpenGL implementations) or zero (for OpenGL ES
1639        *    implementations); or greater than the value of q (for both OpenGL
1640        *    and OpenGL ES). levelbase and q are defined for the texture in
1641        *    section 3.8.10 (Texture Completeness) of the OpenGL 2.1
1642        *    specification and section 3.7.10 of the OpenGL ES 2.0."
1643        */
1644       if (in->miplevel < obj->BaseLevel || in->miplevel > obj->_MaxLevel) {
1645          mtx_unlock(&ctx->Shared->Mutex);
1646          return MESA_GLINTEROP_INVALID_MIP_LEVEL;
1647       }
1648
1649       if (!st_finalize_texture(ctx, st->pipe, obj)) {
1650          mtx_unlock(&ctx->Shared->Mutex);
1651          return MESA_GLINTEROP_OUT_OF_RESOURCES;
1652       }
1653
1654       res = st_get_texobj_resource(obj);
1655       if (!res) {
1656          /* Incomplete texture buffer object? This shouldn't really occur. */
1657          mtx_unlock(&ctx->Shared->Mutex);
1658          return MESA_GLINTEROP_INVALID_OBJECT;
1659       }
1660
1661       if (target == GL_TEXTURE_BUFFER) {
1662          out->internalformat = obj->BufferObjectFormat;
1663          out->buf_offset = obj->BufferOffset;
1664          out->buf_size = obj->BufferSize == -1 ? obj->BufferObject->Size :
1665                                                  obj->BufferSize;
1666
1667          obj->BufferObject->UsageHistory |= USAGE_DISABLE_MINMAX_CACHE;
1668       } else {
1669          out->internalformat = obj->Image[0][0]->InternalFormat;
1670          out->view_minlevel = obj->MinLevel;
1671          out->view_numlevels = obj->NumLevels;
1672          out->view_minlayer = obj->MinLayer;
1673          out->view_numlayers = obj->NumLayers;
1674       }
1675    }
1676
1677    /* Get the handle. */
1678    switch (in->access) {
1679    case MESA_GLINTEROP_ACCESS_READ_WRITE:
1680       usage = PIPE_HANDLE_USAGE_READ_WRITE;
1681       break;
1682    case MESA_GLINTEROP_ACCESS_READ_ONLY:
1683       usage = PIPE_HANDLE_USAGE_READ;
1684       break;
1685    case MESA_GLINTEROP_ACCESS_WRITE_ONLY:
1686       usage = PIPE_HANDLE_USAGE_WRITE;
1687       break;
1688    default:
1689       usage = 0;
1690    }
1691
1692    memset(&whandle, 0, sizeof(whandle));
1693    whandle.type = DRM_API_HANDLE_TYPE_FD;
1694
1695    success = screen->resource_get_handle(screen, res, &whandle, usage);
1696    mtx_unlock(&ctx->Shared->Mutex);
1697
1698    if (!success)
1699       return MESA_GLINTEROP_OUT_OF_HOST_MEMORY;
1700
1701    out->dmabuf_fd = whandle.handle;
1702    out->out_driver_data_written = 0;
1703
1704    if (res->target == PIPE_BUFFER)
1705       out->buf_offset += whandle.offset;
1706
1707    return MESA_GLINTEROP_SUCCESS;
1708 }
1709
1710 static const __DRI2interopExtension dri2InteropExtension = {
1711    .base = { __DRI2_INTEROP, 1 },
1712    .query_device_info = dri2_interop_query_device_info,
1713    .export_object = dri2_interop_export_object
1714 };
1715
1716 /*
1717  * Backend function init_screen.
1718  */
1719
1720 static const __DRIextension *dri_screen_extensions[] = {
1721    &driTexBufferExtension.base,
1722    &dri2FlushExtension.base,
1723    &dri2ImageExtension.base,
1724    &dri2RendererQueryExtension.base,
1725    &dri2ConfigQueryExtension.base,
1726    &dri2ThrottleExtension.base,
1727    &dri2FenceExtension.base,
1728    &dri2InteropExtension.base,
1729    NULL
1730 };
1731
1732 static const __DRIextension *dri_robust_screen_extensions[] = {
1733    &driTexBufferExtension.base,
1734    &dri2FlushExtension.base,
1735    &dri2ImageExtension.base,
1736    &dri2RendererQueryExtension.base,
1737    &dri2ConfigQueryExtension.base,
1738    &dri2ThrottleExtension.base,
1739    &dri2FenceExtension.base,
1740    &dri2InteropExtension.base,
1741    &dri2Robustness.base,
1742    NULL
1743 };
1744
1745 /**
1746  * This is the driver specific part of the createNewScreen entry point.
1747  *
1748  * Returns the struct gl_config supported by this driver.
1749  */
1750 static const __DRIconfig **
1751 dri2_init_screen(__DRIscreen * sPriv)
1752 {
1753    const __DRIconfig **configs;
1754    struct dri_screen *screen;
1755    struct pipe_screen *pscreen = NULL;
1756    const struct drm_conf_ret *throttle_ret;
1757    const struct drm_conf_ret *dmabuf_ret;
1758    int fd;
1759
1760    screen = CALLOC_STRUCT(dri_screen);
1761    if (!screen)
1762       return NULL;
1763
1764    screen->sPriv = sPriv;
1765    screen->fd = sPriv->fd;
1766    pipe_mutex_init(screen->opencl_func_mutex);
1767
1768    sPriv->driverPrivate = (void *)screen;
1769
1770    if (screen->fd < 0 || (fd = dup(screen->fd)) < 0)
1771       goto free_screen;
1772
1773    if (pipe_loader_drm_probe_fd(&screen->dev, fd))
1774       pscreen = pipe_loader_create_screen(screen->dev);
1775
1776    if (!pscreen)
1777        goto release_pipe;
1778
1779    throttle_ret = pipe_loader_configuration(screen->dev, DRM_CONF_THROTTLE);
1780    dmabuf_ret = pipe_loader_configuration(screen->dev, DRM_CONF_SHARE_FD);
1781
1782    if (throttle_ret && throttle_ret->val.val_int != -1) {
1783       screen->throttling_enabled = TRUE;
1784       screen->default_throttle_frames = throttle_ret->val.val_int;
1785    }
1786
1787    if (dmabuf_ret && dmabuf_ret->val.val_bool) {
1788       uint64_t cap;
1789
1790       if (drmGetCap(sPriv->fd, DRM_CAP_PRIME, &cap) == 0 &&
1791           (cap & DRM_PRIME_CAP_IMPORT)) {
1792          dri2ImageExtension.createImageFromFds = dri2_from_fds;
1793          dri2ImageExtension.createImageFromDmaBufs = dri2_from_dma_bufs;
1794       }
1795    }
1796
1797    if (pscreen->get_param(pscreen, PIPE_CAP_DEVICE_RESET_STATUS_QUERY)) {
1798       sPriv->extensions = dri_robust_screen_extensions;
1799       screen->has_reset_status_query = true;
1800    }
1801    else
1802       sPriv->extensions = dri_screen_extensions;
1803
1804    configs = dri_init_screen_helper(screen, pscreen, screen->dev->driver_name);
1805    if (!configs)
1806       goto destroy_screen;
1807
1808    screen->can_share_buffer = true;
1809    screen->auto_fake_front = dri_with_format(sPriv);
1810    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
1811    screen->lookup_egl_image = dri2_lookup_egl_image;
1812
1813    return configs;
1814
1815 destroy_screen:
1816    dri_destroy_screen_helper(screen);
1817
1818 release_pipe:
1819    if (screen->dev)
1820       pipe_loader_release(&screen->dev, 1);
1821    else
1822       close(fd);
1823
1824 free_screen:
1825    FREE(screen);
1826    return NULL;
1827 }
1828
1829 /**
1830  * This is the driver specific part of the createNewScreen entry point.
1831  *
1832  * Returns the struct gl_config supported by this driver.
1833  */
1834 static const __DRIconfig **
1835 dri_kms_init_screen(__DRIscreen * sPriv)
1836 {
1837 #if defined(GALLIUM_SOFTPIPE)
1838    const __DRIconfig **configs;
1839    struct dri_screen *screen;
1840    struct pipe_screen *pscreen = NULL;
1841    uint64_t cap;
1842    int fd;
1843
1844    screen = CALLOC_STRUCT(dri_screen);
1845    if (!screen)
1846       return NULL;
1847
1848    screen->sPriv = sPriv;
1849    screen->fd = sPriv->fd;
1850
1851    sPriv->driverPrivate = (void *)screen;
1852
1853    if (screen->fd < 0 || (fd = dup(screen->fd)) < 0)
1854       goto free_screen;
1855
1856    if (pipe_loader_sw_probe_kms(&screen->dev, fd))
1857       pscreen = pipe_loader_create_screen(screen->dev);
1858
1859    if (!pscreen)
1860        goto release_pipe;
1861
1862    if (drmGetCap(sPriv->fd, DRM_CAP_PRIME, &cap) == 0 &&
1863           (cap & DRM_PRIME_CAP_IMPORT)) {
1864       dri2ImageExtension.createImageFromFds = dri2_from_fds;
1865       dri2ImageExtension.createImageFromDmaBufs = dri2_from_dma_bufs;
1866    }
1867
1868    sPriv->extensions = dri_screen_extensions;
1869
1870    configs = dri_init_screen_helper(screen, pscreen, "swrast");
1871    if (!configs)
1872       goto destroy_screen;
1873
1874    screen->can_share_buffer = false;
1875    screen->auto_fake_front = dri_with_format(sPriv);
1876    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
1877    screen->lookup_egl_image = dri2_lookup_egl_image;
1878
1879    return configs;
1880
1881 destroy_screen:
1882    dri_destroy_screen_helper(screen);
1883
1884 release_pipe:
1885    if (screen->dev)
1886       pipe_loader_release(&screen->dev, 1);
1887    else
1888       close(fd);
1889
1890 free_screen:
1891    FREE(screen);
1892 #endif // GALLIUM_SOFTPIPE
1893    return NULL;
1894 }
1895
1896 static boolean
1897 dri2_create_buffer(__DRIscreen * sPriv,
1898                    __DRIdrawable * dPriv,
1899                    const struct gl_config * visual, boolean isPixmap)
1900 {
1901    struct dri_drawable *drawable = NULL;
1902
1903    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
1904       return FALSE;
1905
1906    drawable = dPriv->driverPrivate;
1907
1908    drawable->allocate_textures = dri2_allocate_textures;
1909    drawable->flush_frontbuffer = dri2_flush_frontbuffer;
1910    drawable->update_tex_buffer = dri2_update_tex_buffer;
1911
1912    return TRUE;
1913 }
1914
1915 /**
1916  * DRI driver virtual function table.
1917  *
1918  * DRI versions differ in their implementation of init_screen and swap_buffers.
1919  */
1920 const struct __DriverAPIRec galliumdrm_driver_api = {
1921    .InitScreen = dri2_init_screen,
1922    .DestroyScreen = dri_destroy_screen,
1923    .CreateContext = dri_create_context,
1924    .DestroyContext = dri_destroy_context,
1925    .CreateBuffer = dri2_create_buffer,
1926    .DestroyBuffer = dri_destroy_buffer,
1927    .MakeCurrent = dri_make_current,
1928    .UnbindContext = dri_unbind_context,
1929
1930    .AllocateBuffer = dri2_allocate_buffer,
1931    .ReleaseBuffer  = dri2_release_buffer,
1932 };
1933
1934 /**
1935  * DRI driver virtual function table.
1936  *
1937  * KMS/DRM version of the DriverAPI above sporting a different InitScreen
1938  * hook. The latter is used to explicitly initialise the kms_swrast driver
1939  * rather than selecting the approapriate driver as suggested by the loader.
1940  */
1941 const struct __DriverAPIRec dri_kms_driver_api = {
1942    .InitScreen = dri_kms_init_screen,
1943    .DestroyScreen = dri_destroy_screen,
1944    .CreateContext = dri_create_context,
1945    .DestroyContext = dri_destroy_context,
1946    .CreateBuffer = dri2_create_buffer,
1947    .DestroyBuffer = dri_destroy_buffer,
1948    .MakeCurrent = dri_make_current,
1949    .UnbindContext = dri_unbind_context,
1950
1951    .AllocateBuffer = dri2_allocate_buffer,
1952    .ReleaseBuffer  = dri2_release_buffer,
1953 };
1954
1955 /* This is the table of extensions that the loader will dlsym() for. */
1956 const __DRIextension *galliumdrm_driver_extensions[] = {
1957     &driCoreExtension.base,
1958     &driImageDriverExtension.base,
1959     &driDRI2Extension.base,
1960     &gallium_config_options.base,
1961     NULL
1962 };
1963
1964 /* vim: set sw=3 ts=8 sts=3 expandtab: */