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 "util/u_memory.h"
  34 #include "util/u_inlines.h"
  35 #include "util/u_format.h"
  36 #include "util/u_debug.h"
  37 #include "state_tracker/drm_driver.h"
  38 #include "state_tracker/st_texture.h"
  39 #include "state_tracker/st_context.h"
  40 #include "pipe-loader/pipe_loader.h"
  41 #include "main/texobj.h"
  42
  43 #include "dri_screen.h"
  44 #include "dri_context.h"
  45 #include "dri_drawable.h"
  46 #include "dri_query_renderer.h"
  47 #include "dri2_buffer.h"
  48
  49 static int convert_fourcc(int format, int *dri_components_p)
  50 {
  51    int dri_components;
  52    switch(format) {
  53    case __DRI_IMAGE_FOURCC_RGB565:
  54       format = __DRI_IMAGE_FORMAT_RGB565;
  55       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  56       break;
  57    case __DRI_IMAGE_FOURCC_ARGB8888:
  58       format = __DRI_IMAGE_FORMAT_ARGB8888;
  59       dri_components = __DRI_IMAGE_COMPONENTS_RGBA;
  60       break;
  61    case __DRI_IMAGE_FOURCC_XRGB8888:
  62       format = __DRI_IMAGE_FORMAT_XRGB8888;
  63       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  64       break;
  65    case __DRI_IMAGE_FOURCC_ABGR8888:
  66       format = __DRI_IMAGE_FORMAT_ABGR8888;
  67       dri_components = __DRI_IMAGE_COMPONENTS_RGBA;
  68       break;
  69    case __DRI_IMAGE_FOURCC_XBGR8888:
  70       format = __DRI_IMAGE_FORMAT_XBGR8888;
  71       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  72       break;
  73    default:
  74       return -1;
  75    }
  76    *dri_components_p = dri_components;
  77    return format;
  78 }
  79
  80 static int convert_to_fourcc(int format)
  81 {
  82    switch(format) {
  83    case __DRI_IMAGE_FORMAT_RGB565:
  84       format = __DRI_IMAGE_FOURCC_RGB565;
  85       break;
  86    case __DRI_IMAGE_FORMAT_ARGB8888:
  87       format = __DRI_IMAGE_FOURCC_ARGB8888;
  88       break;
  89    case __DRI_IMAGE_FORMAT_XRGB8888:
  90       format = __DRI_IMAGE_FOURCC_XRGB8888;
  91       break;
  92    case __DRI_IMAGE_FORMAT_ABGR8888:
  93       format = __DRI_IMAGE_FOURCC_ABGR8888;
  94       break;
  95    case __DRI_IMAGE_FORMAT_XBGR8888:
  96       format = __DRI_IMAGE_FOURCC_XBGR8888;
  97       break;
  98    default:
  99       return -1;
 100    }
 101    return format;
 102 }
 103
 104 static enum pipe_format dri2_format_to_pipe_format (int format)
 105 {
 106    enum pipe_format pf;
 107
 108    switch (format) {
 109    case __DRI_IMAGE_FORMAT_RGB565:
 110       pf = PIPE_FORMAT_B5G6R5_UNORM;
 111       break;
 112    case __DRI_IMAGE_FORMAT_XRGB8888:
 113       pf = PIPE_FORMAT_BGRX8888_UNORM;
 114       break;
 115    case __DRI_IMAGE_FORMAT_ARGB8888:
 116       pf = PIPE_FORMAT_BGRA8888_UNORM;
 117       break;
 118    case __DRI_IMAGE_FORMAT_ABGR8888:
 119       pf = PIPE_FORMAT_RGBA8888_UNORM;
 120       break;
 121    default:
 122       pf = PIPE_FORMAT_NONE;
 123       break;
 124    }
 125
 126    return pf;
 127 }
 128
 129 /**
 130  * DRI2 flush extension.
 131  */
 132 static void
 133 dri2_flush_drawable(__DRIdrawable *dPriv)
 134 {
 135    dri_flush(dPriv->driContextPriv, dPriv, __DRI2_FLUSH_DRAWABLE, -1);
 136 }
 137
 138 static void
 139 dri2_invalidate_drawable(__DRIdrawable *dPriv)
 140 {
 141    struct dri_drawable *drawable = dri_drawable(dPriv);
 142
 143    dri2InvalidateDrawable(dPriv);
 144    drawable->dPriv->lastStamp = drawable->dPriv->dri2.stamp;
 145
 146    p_atomic_inc(&drawable->base.stamp);
 147 }
 148
 149 static const __DRI2flushExtension dri2FlushExtension = {
 150     .base = { __DRI2_FLUSH, 4 },
 151
 152     .flush                = dri2_flush_drawable,
 153     .invalidate           = dri2_invalidate_drawable,
 154     .flush_with_flags     = dri_flush,
 155 };
 156
 157 /**
 158  * Retrieve __DRIbuffer from the DRI loader.
 159  */
 160 static __DRIbuffer *
 161 dri2_drawable_get_buffers(struct dri_drawable *drawable,
 162                           const enum st_attachment_type *atts,
 163                           unsigned *count)
 164 {
 165    __DRIdrawable *dri_drawable = drawable->dPriv;
 166    const __DRIdri2LoaderExtension *loader = drawable->sPriv->dri2.loader;
 167    boolean with_format;
 168    __DRIbuffer *buffers;
 169    int num_buffers;
 170    unsigned attachments[10];
 171    unsigned num_attachments, i;
 172
 173    assert(loader);
 174    with_format = dri_with_format(drawable->sPriv);
 175
 176    num_attachments = 0;
 177
 178    /* for Xserver 1.6.0 (DRI2 version 1) we always need to ask for the front */
 179    if (!with_format)
 180       attachments[num_attachments++] = __DRI_BUFFER_FRONT_LEFT;
 181
 182    for (i = 0; i < *count; i++) {
 183       enum pipe_format format;
 184       unsigned bind;
 185       int att, depth;
 186
 187       dri_drawable_get_format(drawable, atts[i], &format, &bind);
 188       if (format == PIPE_FORMAT_NONE)
 189          continue;
 190
 191       switch (atts[i]) {
 192       case ST_ATTACHMENT_FRONT_LEFT:
 193          /* already added */
 194          if (!with_format)
 195             continue;
 196          att = __DRI_BUFFER_FRONT_LEFT;
 197          break;
 198       case ST_ATTACHMENT_BACK_LEFT:
 199          att = __DRI_BUFFER_BACK_LEFT;
 200          break;
 201       case ST_ATTACHMENT_FRONT_RIGHT:
 202          att = __DRI_BUFFER_FRONT_RIGHT;
 203          break;
 204       case ST_ATTACHMENT_BACK_RIGHT:
 205          att = __DRI_BUFFER_BACK_RIGHT;
 206          break;
 207       default:
 208          continue;
 209       }
 210
 211       /*
 212        * In this switch statement we must support all formats that
 213        * may occur as the stvis->color_format.
 214        */
 215       switch(format) {
 216       case PIPE_FORMAT_BGRA8888_UNORM:
 217          depth = 32;
 218          break;
 219       case PIPE_FORMAT_BGRX8888_UNORM:
 220          depth = 24;
 221          break;
 222       case PIPE_FORMAT_B5G6R5_UNORM:
 223          depth = 16;
 224          break;
 225       default:
 226          depth = util_format_get_blocksizebits(format);
 227          assert(!"Unexpected format in dri2_drawable_get_buffers()");
 228       }
 229
 230       attachments[num_attachments++] = att;
 231       if (with_format) {
 232          attachments[num_attachments++] = depth;
 233       }
 234    }
 235
 236    if (with_format) {
 237       num_attachments /= 2;
 238       buffers = loader->getBuffersWithFormat(dri_drawable,
 239             &dri_drawable->w, &dri_drawable->h,
 240             attachments, num_attachments,
 241             &num_buffers, dri_drawable->loaderPrivate);
 242    }
 243    else {
 244       buffers = loader->getBuffers(dri_drawable,
 245             &dri_drawable->w, &dri_drawable->h,
 246             attachments, num_attachments,
 247             &num_buffers, dri_drawable->loaderPrivate);
 248    }
 249
 250    if (buffers)
 251       *count = num_buffers;
 252
 253    return buffers;
 254 }
 255
 256 static bool
 257 dri_image_drawable_get_buffers(struct dri_drawable *drawable,
 258                                struct __DRIimageList *images,
 259                                const enum st_attachment_type *statts,
 260                                unsigned statts_count)
 261 {
 262    __DRIdrawable *dPriv = drawable->dPriv;
 263    __DRIscreen *sPriv = drawable->sPriv;
 264    unsigned int image_format = __DRI_IMAGE_FORMAT_NONE;
 265    enum pipe_format pf;
 266    uint32_t buffer_mask = 0;
 267    unsigned i, bind;
 268
 269    for (i = 0; i < statts_count; i++) {
 270       dri_drawable_get_format(drawable, statts[i], &pf, &bind);
 271       if (pf == PIPE_FORMAT_NONE)
 272          continue;
 273
 274       switch (statts[i]) {
 275       case ST_ATTACHMENT_FRONT_LEFT:
 276          buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
 277          break;
 278       case ST_ATTACHMENT_BACK_LEFT:
 279          buffer_mask |= __DRI_IMAGE_BUFFER_BACK;
 280          break;
 281       default:
 282          continue;
 283       }
 284
 285       switch (pf) {
 286       case PIPE_FORMAT_B5G6R5_UNORM:
 287          image_format = __DRI_IMAGE_FORMAT_RGB565;
 288          break;
 289       case PIPE_FORMAT_BGRX8888_UNORM:
 290          image_format = __DRI_IMAGE_FORMAT_XRGB8888;
 291          break;
 292       case PIPE_FORMAT_BGRA8888_UNORM:
 293          image_format = __DRI_IMAGE_FORMAT_ARGB8888;
 294          break;
 295       case PIPE_FORMAT_RGBA8888_UNORM:
 296          image_format = __DRI_IMAGE_FORMAT_ABGR8888;
 297          break;
 298       default:
 299          image_format = __DRI_IMAGE_FORMAT_NONE;
 300          break;
 301       }
 302    }
 303
 304    return (*sPriv->image.loader->getBuffers) (dPriv, image_format,
 305                                        (uint32_t *) &drawable->base.stamp,
 306                                        dPriv->loaderPrivate, buffer_mask,
 307                                        images);
 308 }
 309
 310 static __DRIbuffer *
 311 dri2_allocate_buffer(__DRIscreen *sPriv,
 312                      unsigned attachment, unsigned format,
 313                      int width, int height)
 314 {
 315    struct dri_screen *screen = dri_screen(sPriv);
 316    struct dri2_buffer *buffer;
 317    struct pipe_resource templ;
 318    enum pipe_format pf;
 319    unsigned bind = 0;
 320    struct winsys_handle whandle;
 321
 322    switch (attachment) {
 323       case __DRI_BUFFER_FRONT_LEFT:
 324       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 325          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 326          break;
 327       case __DRI_BUFFER_BACK_LEFT:
 328          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 329          break;
 330       case __DRI_BUFFER_DEPTH:
 331       case __DRI_BUFFER_DEPTH_STENCIL:
 332       case __DRI_BUFFER_STENCIL:
 333             bind = PIPE_BIND_DEPTH_STENCIL; /* XXX sampler? */
 334          break;
 335    }
 336
 337    /* because we get the handle and stride */
 338    bind |= PIPE_BIND_SHARED;
 339
 340    switch (format) {
 341       case 32:
 342          pf = PIPE_FORMAT_BGRA8888_UNORM;
 343          break;
 344       case 24:
 345          pf = PIPE_FORMAT_BGRX8888_UNORM;
 346          break;
 347       case 16:
 348          pf = PIPE_FORMAT_Z16_UNORM;
 349          break;
 350       default:
 351          return NULL;
 352    }
 353
 354    buffer = CALLOC_STRUCT(dri2_buffer);
 355    if (!buffer)
 356       return NULL;
 357
 358    memset(&templ, 0, sizeof(templ));
 359    templ.bind = bind;
 360    templ.format = pf;
 361    templ.target = PIPE_TEXTURE_2D;
 362    templ.last_level = 0;
 363    templ.width0 = width;
 364    templ.height0 = height;
 365    templ.depth0 = 1;
 366    templ.array_size = 1;
 367
 368    buffer->resource =
 369       screen->base.screen->resource_create(screen->base.screen, &templ);
 370    if (!buffer->resource) {
 371       FREE(buffer);
 372       return NULL;
 373    }
 374
 375    memset(&whandle, 0, sizeof(whandle));
 376    if (screen->can_share_buffer)
 377       whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 378    else
 379       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 380
 381    screen->base.screen->resource_get_handle(screen->base.screen,
 382          buffer->resource, &whandle,
 383          PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ);
 384
 385    buffer->base.attachment = attachment;
 386    buffer->base.name = whandle.handle;
 387    buffer->base.cpp = util_format_get_blocksize(pf);
 388    buffer->base.pitch = whandle.stride;
 389
 390    return &buffer->base;
 391 }
 392
 393 static void
 394 dri2_release_buffer(__DRIscreen *sPriv, __DRIbuffer *bPriv)
 395 {
 396    struct dri2_buffer *buffer = dri2_buffer(bPriv);
 397
 398    pipe_resource_reference(&buffer->resource, NULL);
 399    FREE(buffer);
 400 }
 401
 402 /*
 403  * Backend functions for st_framebuffer interface.
 404  */
 405
 406 static void
 407 dri2_allocate_textures(struct dri_context *ctx,
 408                        struct dri_drawable *drawable,
 409                        const enum st_attachment_type *statts,
 410                        unsigned statts_count)
 411 {
 412    __DRIscreen *sPriv = drawable->sPriv;
 413    __DRIdrawable *dri_drawable = drawable->dPriv;
 414    struct dri_screen *screen = dri_screen(sPriv);
 415    struct pipe_resource templ;
 416    boolean alloc_depthstencil = FALSE;
 417    unsigned i, j, bind;
 418    const __DRIimageLoaderExtension *image = sPriv->image.loader;
 419    /* Image specific variables */
 420    struct __DRIimageList images;
 421    /* Dri2 specific variables */
 422    __DRIbuffer *buffers = NULL;
 423    struct winsys_handle whandle;
 424    unsigned num_buffers = statts_count;
 425
 426    /* First get the buffers from the loader */
 427    if (image) {
 428       if (!dri_image_drawable_get_buffers(drawable, &images,
 429                                           statts, statts_count))
 430          return;
 431    }
 432    else {
 433       buffers = dri2_drawable_get_buffers(drawable, statts, &num_buffers);
 434       if (!buffers || (drawable->old_num == num_buffers &&
 435                        drawable->old_w == dri_drawable->w &&
 436                        drawable->old_h == dri_drawable->h &&
 437                        memcmp(drawable->old, buffers,
 438                               sizeof(__DRIbuffer) * num_buffers) == 0))
 439          return;
 440    }
 441
 442    /* Second clean useless resources*/
 443
 444    /* See if we need a depth-stencil buffer. */
 445    for (i = 0; i < statts_count; i++) {
 446       if (statts[i] == ST_ATTACHMENT_DEPTH_STENCIL) {
 447          alloc_depthstencil = TRUE;
 448          break;
 449       }
 450    }
 451
 452    /* Delete the resources we won't need. */
 453    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 454       /* Don't delete the depth-stencil buffer, we can reuse it. */
 455       if (i == ST_ATTACHMENT_DEPTH_STENCIL && alloc_depthstencil)
 456          continue;
 457
 458       /* Flush the texture before unreferencing, so that other clients can
 459        * see what the driver has rendered.
 460        */
 461       if (i != ST_ATTACHMENT_DEPTH_STENCIL && drawable->textures[i]) {
 462          struct pipe_context *pipe = ctx->st->pipe;
 463          pipe->flush_resource(pipe, drawable->textures[i]);
 464       }
 465
 466       pipe_resource_reference(&drawable->textures[i], NULL);
 467    }
 468
 469    if (drawable->stvis.samples > 1) {
 470       for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 471          boolean del = TRUE;
 472
 473          /* Don't delete MSAA resources for the attachments which are enabled,
 474           * we can reuse them. */
 475          for (j = 0; j < statts_count; j++) {
 476             if (i == statts[j]) {
 477                del = FALSE;
 478                break;
 479             }
 480          }
 481
 482          if (del) {
 483             pipe_resource_reference(&drawable->msaa_textures[i], NULL);
 484          }
 485       }
 486    }
 487
 488    /* Third use the buffers retrieved to fill the drawable info */
 489
 490    memset(&templ, 0, sizeof(templ));
 491    templ.target = screen->target;
 492    templ.last_level = 0;
 493    templ.depth0 = 1;
 494    templ.array_size = 1;
 495
 496    if (image) {
 497       if (images.image_mask & __DRI_IMAGE_BUFFER_FRONT) {
 498          struct pipe_resource **buf =
 499             &drawable->textures[ST_ATTACHMENT_FRONT_LEFT];
 500          struct pipe_resource *texture = images.front->texture;
 501
 502          dri_drawable->w = texture->width0;
 503          dri_drawable->h = texture->height0;
 504
 505          pipe_resource_reference(buf, texture);
 506       }
 507
 508       if (images.image_mask & __DRI_IMAGE_BUFFER_BACK) {
 509          struct pipe_resource **buf =
 510             &drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 511          struct pipe_resource *texture = images.back->texture;
 512
 513          dri_drawable->w = texture->width0;
 514          dri_drawable->h = texture->height0;
 515
 516          pipe_resource_reference(buf, texture);
 517       }
 518
 519       /* Note: if there is both a back and a front buffer,
 520        * then they have the same size.
 521        */
 522       templ.width0 = dri_drawable->w;
 523       templ.height0 = dri_drawable->h;
 524    }
 525    else {
 526       memset(&whandle, 0, sizeof(whandle));
 527
 528       /* Process DRI-provided buffers and get pipe_resources. */
 529       for (i = 0; i < num_buffers; i++) {
 530          __DRIbuffer *buf = &buffers[i];
 531          enum st_attachment_type statt;
 532          enum pipe_format format;
 533
 534          switch (buf->attachment) {
 535          case __DRI_BUFFER_FRONT_LEFT:
 536             if (!screen->auto_fake_front) {
 537                continue; /* invalid attachment */
 538             }
 539             /* fallthrough */
 540          case __DRI_BUFFER_FAKE_FRONT_LEFT:
 541             statt = ST_ATTACHMENT_FRONT_LEFT;
 542             break;
 543          case __DRI_BUFFER_BACK_LEFT:
 544             statt = ST_ATTACHMENT_BACK_LEFT;
 545             break;
 546          default:
 547             continue; /* invalid attachment */
 548          }
 549
 550          dri_drawable_get_format(drawable, statt, &format, &bind);
 551          if (format == PIPE_FORMAT_NONE)
 552             continue;
 553
 554          /* dri2_drawable_get_buffers has already filled dri_drawable->w
 555           * and dri_drawable->h */
 556          templ.width0 = dri_drawable->w;
 557          templ.height0 = dri_drawable->h;
 558          templ.format = format;
 559          templ.bind = bind;
 560          whandle.handle = buf->name;
 561          whandle.stride = buf->pitch;
 562          whandle.offset = 0;
 563          if (screen->can_share_buffer)
 564             whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 565          else
 566             whandle.type = DRM_API_HANDLE_TYPE_KMS;
 567          drawable->textures[statt] =
 568             screen->base.screen->resource_from_handle(screen->base.screen,
 569                   &templ, &whandle,
 570                   PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ);
 571          assert(drawable->textures[statt]);
 572       }
 573    }
 574
 575    /* Allocate private MSAA colorbuffers. */
 576    if (drawable->stvis.samples > 1) {
 577       for (i = 0; i < statts_count; i++) {
 578          enum st_attachment_type statt = statts[i];
 579
 580          if (statt == ST_ATTACHMENT_DEPTH_STENCIL)
 581             continue;
 582
 583          if (drawable->textures[statt]) {
 584             templ.format = drawable->textures[statt]->format;
 585             templ.bind = drawable->textures[statt]->bind & ~PIPE_BIND_SCANOUT;
 586             templ.nr_samples = drawable->stvis.samples;
 587
 588             /* Try to reuse the resource.
 589              * (the other resource parameters should be constant)
 590              */
 591             if (!drawable->msaa_textures[statt] ||
 592                 drawable->msaa_textures[statt]->width0 != templ.width0 ||
 593                 drawable->msaa_textures[statt]->height0 != templ.height0) {
 594                /* Allocate a new one. */
 595                pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 596
 597                drawable->msaa_textures[statt] =
 598                   screen->base.screen->resource_create(screen->base.screen,
 599                                                        &templ);
 600                assert(drawable->msaa_textures[statt]);
 601
 602                /* If there are any MSAA resources, we should initialize them
 603                 * such that they contain the same data as the single-sample
 604                 * resources we just got from the X server.
 605                 *
 606                 * The reason for this is that the state tracker (and
 607                 * therefore the app) can access the MSAA resources only.
 608                 * The single-sample resources are not exposed
 609                 * to the state tracker.
 610                 *
 611                 */
 612                dri_pipe_blit(ctx->st->pipe,
 613                              drawable->msaa_textures[statt],
 614                              drawable->textures[statt]);
 615             }
 616          }
 617          else {
 618             pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 619          }
 620       }
 621    }
 622
 623    /* Allocate a private depth-stencil buffer. */
 624    if (alloc_depthstencil) {
 625       enum st_attachment_type statt = ST_ATTACHMENT_DEPTH_STENCIL;
 626       struct pipe_resource **zsbuf;
 627       enum pipe_format format;
 628       unsigned bind;
 629
 630       dri_drawable_get_format(drawable, statt, &format, &bind);
 631
 632       if (format) {
 633          templ.format = format;
 634          templ.bind = bind;
 635
 636          if (drawable->stvis.samples > 1) {
 637             templ.nr_samples = drawable->stvis.samples;
 638             zsbuf = &drawable->msaa_textures[statt];
 639          }
 640          else {
 641             templ.nr_samples = 0;
 642             zsbuf = &drawable->textures[statt];
 643          }
 644
 645          /* Try to reuse the resource.
 646           * (the other resource parameters should be constant)
 647           */
 648          if (!*zsbuf ||
 649              (*zsbuf)->width0 != templ.width0 ||
 650              (*zsbuf)->height0 != templ.height0) {
 651             /* Allocate a new one. */
 652             pipe_resource_reference(zsbuf, NULL);
 653             *zsbuf = screen->base.screen->resource_create(screen->base.screen,
 654                                                           &templ);
 655             assert(*zsbuf);
 656          }
 657       }
 658       else {
 659          pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 660          pipe_resource_reference(&drawable->textures[statt], NULL);
 661       }
 662    }
 663
 664    /* For DRI2, we may get the same buffers again from the server.
 665     * To prevent useless imports of gem names, drawable->old* is used
 666     * to bypass the import if we get the same buffers. This doesn't apply
 667     * to DRI3/Wayland, users of image.loader, since the buffer is managed
 668     * by the client (no import), and the back buffer is going to change
 669     * at every redraw.
 670     */
 671    if (!image) {
 672       drawable->old_num = num_buffers;
 673       drawable->old_w = dri_drawable->w;
 674       drawable->old_h = dri_drawable->h;
 675       memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * num_buffers);
 676    }
 677 }
 678
 679 static void
 680 dri2_flush_frontbuffer(struct dri_context *ctx,
 681                        struct dri_drawable *drawable,
 682                        enum st_attachment_type statt)
 683 {
 684    __DRIdrawable *dri_drawable = drawable->dPriv;
 685    const __DRIimageLoaderExtension *image = drawable->sPriv->image.loader;
 686    const __DRIdri2LoaderExtension *loader = drawable->sPriv->dri2.loader;
 687    struct pipe_context *pipe = ctx->st->pipe;
 688
 689    if (statt != ST_ATTACHMENT_FRONT_LEFT)
 690       return;
 691
 692    if (drawable->stvis.samples > 1) {
 693       /* Resolve the front buffer. */
 694       dri_pipe_blit(ctx->st->pipe,
 695                     drawable->textures[ST_ATTACHMENT_FRONT_LEFT],
 696                     drawable->msaa_textures[ST_ATTACHMENT_FRONT_LEFT]);
 697    }
 698
 699    if (drawable->textures[ST_ATTACHMENT_FRONT_LEFT]) {
 700       pipe->flush_resource(pipe, drawable->textures[ST_ATTACHMENT_FRONT_LEFT]);
 701    }
 702
 703    pipe->flush(pipe, NULL, 0);
 704
 705    if (image) {
 706       image->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 707    }
 708    else if (loader->flushFrontBuffer) {
 709       loader->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 710    }
 711 }
 712
 713 static void
 714 dri2_update_tex_buffer(struct dri_drawable *drawable,
 715                        struct dri_context *ctx,
 716                        struct pipe_resource *res)
 717 {
 718    /* no-op */
 719 }
 720
 721 static __DRIimage *
 722 dri2_lookup_egl_image(struct dri_screen *screen, void *handle)
 723 {
 724    const __DRIimageLookupExtension *loader = screen->sPriv->dri2.image;
 725    __DRIimage *img;
 726
 727    if (!loader->lookupEGLImage)
 728       return NULL;
 729
 730    img = loader->lookupEGLImage(screen->sPriv,
 731                                 handle, screen->sPriv->loaderPrivate);
 732
 733    return img;
 734 }
 735
 736 static __DRIimage *
 737 dri2_create_image_from_winsys(__DRIscreen *_screen,
 738                               int width, int height, int format,
 739                               struct winsys_handle *whandle,
 740                               void *loaderPrivate)
 741 {
 742    struct dri_screen *screen = dri_screen(_screen);
 743    __DRIimage *img;
 744    struct pipe_resource templ;
 745    unsigned tex_usage;
 746    enum pipe_format pf;
 747
 748    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 749
 750    pf = dri2_format_to_pipe_format (format);
 751    if (pf == PIPE_FORMAT_NONE)
 752       return NULL;
 753
 754    img = CALLOC_STRUCT(__DRIimageRec);
 755    if (!img)
 756       return NULL;
 757
 758    memset(&templ, 0, sizeof(templ));
 759    templ.bind = tex_usage;
 760    templ.format = pf;
 761    templ.target = screen->target;
 762    templ.last_level = 0;
 763    templ.width0 = width;
 764    templ.height0 = height;
 765    templ.depth0 = 1;
 766    templ.array_size = 1;
 767
 768    whandle->offset = 0;
 769
 770    img->texture = screen->base.screen->resource_from_handle(screen->base.screen,
 771          &templ, whandle, PIPE_HANDLE_USAGE_READ_WRITE);
 772    if (!img->texture) {
 773       FREE(img);
 774       return NULL;
 775    }
 776
 777    img->level = 0;
 778    img->layer = 0;
 779    img->dri_format = format;
 780    img->use = 0;
 781    img->loader_private = loaderPrivate;
 782
 783    return img;
 784 }
 785
 786 static __DRIimage *
 787 dri2_create_image_from_name(__DRIscreen *_screen,
 788                             int width, int height, int format,
 789                             int name, int pitch, void *loaderPrivate)
 790 {
 791    struct winsys_handle whandle;
 792    enum pipe_format pf;
 793
 794    memset(&whandle, 0, sizeof(whandle));
 795    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 796    whandle.handle = name;
 797
 798    pf = dri2_format_to_pipe_format (format);
 799    if (pf == PIPE_FORMAT_NONE)
 800       return NULL;
 801
 802    whandle.stride = pitch * util_format_get_blocksize(pf);
 803
 804    return dri2_create_image_from_winsys(_screen, width, height, format,
 805                                         &whandle, loaderPrivate);
 806 }
 807
 808 static __DRIimage *
 809 dri2_create_image_from_fd(__DRIscreen *_screen,
 810                           int width, int height, int format,
 811                           int fd, int stride, void *loaderPrivate)
 812 {
 813    struct winsys_handle whandle;
 814
 815    if (fd < 0)
 816       return NULL;
 817
 818    memset(&whandle, 0, sizeof(whandle));
 819    whandle.type = DRM_API_HANDLE_TYPE_FD;
 820    whandle.handle = (unsigned)fd;
 821    whandle.stride = stride;
 822
 823    return dri2_create_image_from_winsys(_screen, width, height, format,
 824                                         &whandle, loaderPrivate);
 825 }
 826
 827 static __DRIimage *
 828 dri2_create_image_from_renderbuffer(__DRIcontext *context,
 829                                     int renderbuffer, void *loaderPrivate)
 830 {
 831    struct dri_context *ctx = dri_context(context);
 832
 833    if (!ctx->st->get_resource_for_egl_image)
 834       return NULL;
 835
 836    /* TODO */
 837    return NULL;
 838 }
 839
 840 static __DRIimage *
 841 dri2_create_image(__DRIscreen *_screen,
 842                    int width, int height, int format,
 843                    unsigned int use, void *loaderPrivate)
 844 {
 845    struct dri_screen *screen = dri_screen(_screen);
 846    __DRIimage *img;
 847    struct pipe_resource templ;
 848    unsigned tex_usage;
 849    enum pipe_format pf;
 850
 851    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 852    if (use & __DRI_IMAGE_USE_SCANOUT)
 853       tex_usage |= PIPE_BIND_SCANOUT;
 854    if (use & __DRI_IMAGE_USE_SHARE)
 855       tex_usage |= PIPE_BIND_SHARED;
 856    if (use & __DRI_IMAGE_USE_LINEAR)
 857       tex_usage |= PIPE_BIND_LINEAR;
 858    if (use & __DRI_IMAGE_USE_CURSOR) {
 859       if (width != 64 || height != 64)
 860          return NULL;
 861       tex_usage |= PIPE_BIND_CURSOR;
 862    }
 863
 864    pf = dri2_format_to_pipe_format (format);
 865    if (pf == PIPE_FORMAT_NONE)
 866       return NULL;
 867
 868    img = CALLOC_STRUCT(__DRIimageRec);
 869    if (!img)
 870       return NULL;
 871
 872    memset(&templ, 0, sizeof(templ));
 873    templ.bind = tex_usage;
 874    templ.format = pf;
 875    templ.target = PIPE_TEXTURE_2D;
 876    templ.last_level = 0;
 877    templ.width0 = width;
 878    templ.height0 = height;
 879    templ.depth0 = 1;
 880    templ.array_size = 1;
 881
 882    img->texture = screen->base.screen->resource_create(screen->base.screen, &templ);
 883    if (!img->texture) {
 884       FREE(img);
 885       return NULL;
 886    }
 887
 888    img->level = 0;
 889    img->layer = 0;
 890    img->dri_format = format;
 891    img->dri_components = 0;
 892    img->use = use;
 893
 894    img->loader_private = loaderPrivate;
 895    return img;
 896 }
 897
 898 static GLboolean
 899 dri2_query_image(__DRIimage *image, int attrib, int *value)
 900 {
 901    struct winsys_handle whandle;
 902    unsigned usage;
 903
 904    if (image->use & __DRI_IMAGE_USE_BACKBUFFER)
 905       usage = PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ;
 906    else
 907       usage = PIPE_HANDLE_USAGE_READ_WRITE;
 908
 909    memset(&whandle, 0, sizeof(whandle));
 910
 911    switch (attrib) {
 912    case __DRI_IMAGE_ATTRIB_STRIDE:
 913       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 914       image->texture->screen->resource_get_handle(image->texture->screen,
 915             image->texture, &whandle, usage);
 916       *value = whandle.stride;
 917       return GL_TRUE;
 918    case __DRI_IMAGE_ATTRIB_HANDLE:
 919       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 920       image->texture->screen->resource_get_handle(image->texture->screen,
 921          image->texture, &whandle, usage);
 922       *value = whandle.handle;
 923       return GL_TRUE;
 924    case __DRI_IMAGE_ATTRIB_NAME:
 925       whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 926       image->texture->screen->resource_get_handle(image->texture->screen,
 927          image->texture, &whandle, usage);
 928       *value = whandle.handle;
 929       return GL_TRUE;
 930    case __DRI_IMAGE_ATTRIB_FD:
 931       whandle.type= DRM_API_HANDLE_TYPE_FD;
 932       image->texture->screen->resource_get_handle(image->texture->screen,
 933          image->texture, &whandle, usage);
 934       *value = whandle.handle;
 935       return GL_TRUE;
 936    case __DRI_IMAGE_ATTRIB_FORMAT:
 937       *value = image->dri_format;
 938       return GL_TRUE;
 939    case __DRI_IMAGE_ATTRIB_WIDTH:
 940       *value = image->texture->width0;
 941       return GL_TRUE;
 942    case __DRI_IMAGE_ATTRIB_HEIGHT:
 943       *value = image->texture->height0;
 944       return GL_TRUE;
 945    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 946       if (image->dri_components == 0)
 947          return GL_FALSE;
 948       *value = image->dri_components;
 949       return GL_TRUE;
 950    case __DRI_IMAGE_ATTRIB_FOURCC:
 951       *value = convert_to_fourcc(image->dri_format);
 952       return GL_TRUE;
 953    case __DRI_IMAGE_ATTRIB_NUM_PLANES:
 954       *value = 1;
 955       return GL_TRUE;
 956    default:
 957       return GL_FALSE;
 958    }
 959 }
 960
 961 static __DRIimage *
 962 dri2_dup_image(__DRIimage *image, void *loaderPrivate)
 963 {
 964    __DRIimage *img;
 965
 966    img = CALLOC_STRUCT(__DRIimageRec);
 967    if (!img)
 968       return NULL;
 969
 970    img->texture = NULL;
 971    pipe_resource_reference(&img->texture, image->texture);
 972    img->level = image->level;
 973    img->layer = image->layer;
 974    img->dri_format = image->dri_format;
 975    /* This should be 0 for sub images, but dup is also used for base images. */
 976    img->dri_components = image->dri_components;
 977    img->loader_private = loaderPrivate;
 978
 979    return img;
 980 }
 981
 982 static GLboolean
 983 dri2_validate_usage(__DRIimage *image, unsigned int use)
 984 {
 985    /*
 986     * Gallium drivers are bad at adding usages to the resources
 987     * once opened again in another process, which is the main use
 988     * case for this, so we have to lie.
 989     */
 990    if (image != NULL)
 991       return GL_TRUE;
 992    else
 993       return GL_FALSE;
 994 }
 995
 996 static __DRIimage *
 997 dri2_from_names(__DRIscreen *screen, int width, int height, int format,
 998                 int *names, int num_names, int *strides, int *offsets,
 999                 void *loaderPrivate)
1000 {
1001    __DRIimage *img;
1002    int dri_components;
1003    struct winsys_handle whandle;
1004
1005    if (num_names != 1)
1006       return NULL;
1007    if (offsets[0] != 0)
1008       return NULL;
1009
1010    format = convert_fourcc(format, &dri_components);
1011    if (format == -1)
1012       return NULL;
1013
1014    memset(&whandle, 0, sizeof(whandle));
1015    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
1016    whandle.handle = names[0];
1017    whandle.stride = strides[0];
1018
1019    img = dri2_create_image_from_winsys(screen, width, height, format,
1020                                        &whandle, loaderPrivate);
1021    if (img == NULL)
1022       return NULL;
1023
1024    img->dri_components = dri_components;
1025    return img;
1026 }
1027
1028 static __DRIimage *
1029 dri2_from_planar(__DRIimage *image, int plane, void *loaderPrivate)
1030 {
1031    __DRIimage *img;
1032
1033    if (plane != 0)
1034       return NULL;
1035
1036    if (image->dri_components == 0)
1037       return NULL;
1038
1039    img = dri2_dup_image(image, loaderPrivate);
1040    if (img == NULL)
1041       return NULL;
1042
1043    /* set this to 0 for sub images. */
1044    img->dri_components = 0;
1045    return img;
1046 }
1047
1048 static __DRIimage *
1049 dri2_create_from_texture(__DRIcontext *context, int target, unsigned texture,
1050                          int depth, int level, unsigned *error,
1051                          void *loaderPrivate)
1052 {
1053    __DRIimage *img;
1054    struct gl_context *ctx = ((struct st_context *)dri_context(context)->st)->ctx;
1055    struct gl_texture_object *obj;
1056    struct pipe_resource *tex;
1057    GLuint face = 0;
1058
1059    obj = _mesa_lookup_texture(ctx, texture);
1060    if (!obj || obj->Target != target) {
1061       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1062       return NULL;
1063    }
1064
1065    tex = st_get_texobj_resource(obj);
1066    if (!tex) {
1067       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1068       return NULL;
1069    }
1070
1071    if (target == GL_TEXTURE_CUBE_MAP)
1072       face = depth;
1073
1074    _mesa_test_texobj_completeness(ctx, obj);
1075    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
1076       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1077       return NULL;
1078    }
1079
1080    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
1081       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1082       return NULL;
1083    }
1084
1085    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < depth) {
1086       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1087       return NULL;
1088    }
1089
1090    img = CALLOC_STRUCT(__DRIimageRec);
1091    if (!img) {
1092       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
1093       return NULL;
1094    }
1095
1096    img->level = level;
1097    img->layer = depth;
1098    img->dri_format = driGLFormatToImageFormat(obj->Image[face][level]->TexFormat);
1099
1100    img->loader_private = loaderPrivate;
1101
1102    if (img->dri_format == __DRI_IMAGE_FORMAT_NONE) {
1103       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1104       free(img);
1105       return NULL;
1106    }
1107
1108    pipe_resource_reference(&img->texture, tex);
1109
1110    *error = __DRI_IMAGE_ERROR_SUCCESS;
1111    return img;
1112 }
1113
1114 static __DRIimage *
1115 dri2_from_fds(__DRIscreen *screen, int width, int height, int fourcc,
1116               int *fds, int num_fds, int *strides, int *offsets,
1117               void *loaderPrivate)
1118 {
1119    __DRIimage *img;
1120    int format, dri_components;
1121
1122    if (num_fds != 1)
1123       return NULL;
1124    if (offsets[0] != 0)
1125       return NULL;
1126
1127    format = convert_fourcc(fourcc, &dri_components);
1128    if (format == -1)
1129       return NULL;
1130
1131    img = dri2_create_image_from_fd(screen, width, height, format,
1132                                    fds[0], strides[0], loaderPrivate);
1133    if (img == NULL)
1134       return NULL;
1135
1136    img->dri_components = dri_components;
1137    return img;
1138 }
1139
1140 static __DRIimage *
1141 dri2_from_dma_bufs(__DRIscreen *screen,
1142                    int width, int height, int fourcc,
1143                    int *fds, int num_fds,
1144                    int *strides, int *offsets,
1145                    enum __DRIYUVColorSpace yuv_color_space,
1146                    enum __DRISampleRange sample_range,
1147                    enum __DRIChromaSiting horizontal_siting,
1148                    enum __DRIChromaSiting vertical_siting,
1149                    unsigned *error,
1150                    void *loaderPrivate)
1151 {
1152    __DRIimage *img;
1153    int format, dri_components;
1154
1155    if (num_fds != 1 || offsets[0] != 0) {
1156       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1157       return NULL;
1158    }
1159
1160    format = convert_fourcc(fourcc, &dri_components);
1161    if (format == -1) {
1162       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1163       return NULL;
1164    }
1165
1166    img = dri2_create_image_from_fd(screen, width, height, format,
1167                                    fds[0], strides[0], loaderPrivate);
1168    if (img == NULL) {
1169       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
1170       return NULL;
1171    }
1172
1173    img->yuv_color_space = yuv_color_space;
1174    img->sample_range = sample_range;
1175    img->horizontal_siting = horizontal_siting;
1176    img->vertical_siting = vertical_siting;
1177    img->dri_components = dri_components;
1178
1179    *error = __DRI_IMAGE_ERROR_SUCCESS;
1180    return img;
1181 }
1182
1183 static void
1184 dri2_blit_image(__DRIcontext *context, __DRIimage *dst, __DRIimage *src,
1185                 int dstx0, int dsty0, int dstwidth, int dstheight,
1186                 int srcx0, int srcy0, int srcwidth, int srcheight,
1187                 int flush_flag)
1188 {
1189    struct dri_context *ctx = dri_context(context);
1190    struct pipe_context *pipe = ctx->st->pipe;
1191    struct pipe_screen *screen;
1192    struct pipe_fence_handle *fence;
1193    struct pipe_blit_info blit;
1194
1195    if (!dst || !src)
1196       return;
1197
1198    memset(&blit, 0, sizeof(blit));
1199    blit.dst.resource = dst->texture;
1200    blit.dst.box.x = dstx0;
1201    blit.dst.box.y = dsty0;
1202    blit.dst.box.width = dstwidth;
1203    blit.dst.box.height = dstheight;
1204    blit.dst.box.depth = 1;
1205    blit.dst.format = dst->texture->format;
1206    blit.src.resource = src->texture;
1207    blit.src.box.x = srcx0;
1208    blit.src.box.y = srcy0;
1209    blit.src.box.width = srcwidth;
1210    blit.src.box.height = srcheight;
1211    blit.src.box.depth = 1;
1212    blit.src.format = src->texture->format;
1213    blit.mask = PIPE_MASK_RGBA;
1214    blit.filter = PIPE_TEX_FILTER_NEAREST;
1215
1216    pipe->blit(pipe, &blit);
1217
1218    if (flush_flag == __BLIT_FLAG_FLUSH) {
1219       pipe->flush_resource(pipe, dst->texture);
1220       ctx->st->flush(ctx->st, 0, NULL);
1221    } else if (flush_flag == __BLIT_FLAG_FINISH) {
1222       screen = dri_screen(ctx->sPriv)->base.screen;
1223       pipe->flush_resource(pipe, dst->texture);
1224       ctx->st->flush(ctx->st, 0, &fence);
1225       (void) screen->fence_finish(screen, fence, PIPE_TIMEOUT_INFINITE);
1226       screen->fence_reference(screen, &fence, NULL);
1227    }
1228 }
1229
1230 static void
1231 dri2_destroy_image(__DRIimage *img)
1232 {
1233    pipe_resource_reference(&img->texture, NULL);
1234    FREE(img);
1235 }
1236
1237 static int
1238 dri2_get_capabilities(__DRIscreen *_screen)
1239 {
1240    struct dri_screen *screen = dri_screen(_screen);
1241
1242    return (screen->can_share_buffer ? __DRI_IMAGE_CAP_GLOBAL_NAMES : 0);
1243 }
1244
1245 /* The extension is modified during runtime if DRI_PRIME is detected */
1246 static __DRIimageExtension dri2ImageExtension = {
1247     .base = { __DRI_IMAGE, 11 },
1248
1249     .createImageFromName          = dri2_create_image_from_name,
1250     .createImageFromRenderbuffer  = dri2_create_image_from_renderbuffer,
1251     .destroyImage                 = dri2_destroy_image,
1252     .createImage                  = dri2_create_image,
1253     .queryImage                   = dri2_query_image,
1254     .dupImage                     = dri2_dup_image,
1255     .validateUsage                = dri2_validate_usage,
1256     .createImageFromNames         = dri2_from_names,
1257     .fromPlanar                   = dri2_from_planar,
1258     .createImageFromTexture       = dri2_create_from_texture,
1259     .createImageFromFds           = NULL,
1260     .createImageFromDmaBufs       = NULL,
1261     .blitImage                    = dri2_blit_image,
1262     .getCapabilities              = dri2_get_capabilities,
1263 };
1264
1265
1266 static bool
1267 dri2_is_opencl_interop_loaded_locked(struct dri_screen *screen)
1268 {
1269    return screen->opencl_dri_event_add_ref &&
1270           screen->opencl_dri_event_release &&
1271           screen->opencl_dri_event_wait &&
1272           screen->opencl_dri_event_get_fence;
1273 }
1274
1275 static bool
1276 dri2_load_opencl_interop(struct dri_screen *screen)
1277 {
1278 #if defined(RTLD_DEFAULT)
1279    bool success;
1280
1281    pipe_mutex_lock(screen->opencl_func_mutex);
1282
1283    if (dri2_is_opencl_interop_loaded_locked(screen)) {
1284       pipe_mutex_unlock(screen->opencl_func_mutex);
1285       return true;
1286    }
1287
1288    screen->opencl_dri_event_add_ref =
1289       dlsym(RTLD_DEFAULT, "opencl_dri_event_add_ref");
1290    screen->opencl_dri_event_release =
1291       dlsym(RTLD_DEFAULT, "opencl_dri_event_release");
1292    screen->opencl_dri_event_wait =
1293       dlsym(RTLD_DEFAULT, "opencl_dri_event_wait");
1294    screen->opencl_dri_event_get_fence =
1295       dlsym(RTLD_DEFAULT, "opencl_dri_event_get_fence");
1296
1297    success = dri2_is_opencl_interop_loaded_locked(screen);
1298    pipe_mutex_unlock(screen->opencl_func_mutex);
1299    return success;
1300 #else
1301    return false;
1302 #endif
1303 }
1304
1305 struct dri2_fence {
1306    struct dri_screen *driscreen;
1307    struct pipe_fence_handle *pipe_fence;
1308    void *cl_event;
1309 };
1310
1311 static void *
1312 dri2_create_fence(__DRIcontext *_ctx)
1313 {
1314    struct pipe_context *ctx = dri_context(_ctx)->st->pipe;
1315    struct dri2_fence *fence = CALLOC_STRUCT(dri2_fence);
1316
1317    if (!fence)
1318       return NULL;
1319
1320    ctx->flush(ctx, &fence->pipe_fence, 0);
1321
1322    if (!fence->pipe_fence) {
1323       FREE(fence);
1324       return NULL;
1325    }
1326
1327    fence->driscreen = dri_screen(_ctx->driScreenPriv);
1328    return fence;
1329 }
1330
1331 static void *
1332 dri2_get_fence_from_cl_event(__DRIscreen *_screen, intptr_t cl_event)
1333 {
1334    struct dri_screen *driscreen = dri_screen(_screen);
1335    struct dri2_fence *fence;
1336
1337    if (!dri2_load_opencl_interop(driscreen))
1338       return NULL;
1339
1340    fence = CALLOC_STRUCT(dri2_fence);
1341    if (!fence)
1342       return NULL;
1343
1344    fence->cl_event = (void*)cl_event;
1345
1346    if (!driscreen->opencl_dri_event_add_ref(fence->cl_event)) {
1347       free(fence);
1348       return NULL;
1349    }
1350
1351    fence->driscreen = driscreen;
1352    return fence;
1353 }
1354
1355 static void
1356 dri2_destroy_fence(__DRIscreen *_screen, void *_fence)
1357 {
1358    struct dri_screen *driscreen = dri_screen(_screen);
1359    struct pipe_screen *screen = driscreen->base.screen;
1360    struct dri2_fence *fence = (struct dri2_fence*)_fence;
1361
1362    if (fence->pipe_fence)
1363       screen->fence_reference(screen, &fence->pipe_fence, NULL);
1364    else if (fence->cl_event)
1365       driscreen->opencl_dri_event_release(fence->cl_event);
1366    else
1367       assert(0);
1368
1369    FREE(fence);
1370 }
1371
1372 static GLboolean
1373 dri2_client_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags,
1374                       uint64_t timeout)
1375 {
1376    struct dri2_fence *fence = (struct dri2_fence*)_fence;
1377    struct dri_screen *driscreen = fence->driscreen;
1378    struct pipe_screen *screen = driscreen->base.screen;
1379
1380    /* No need to flush. The context was flushed when the fence was created. */
1381
1382    if (fence->pipe_fence)
1383       return screen->fence_finish(screen, fence->pipe_fence, timeout);
1384    else if (fence->cl_event) {
1385       struct pipe_fence_handle *pipe_fence =
1386          driscreen->opencl_dri_event_get_fence(fence->cl_event);
1387
1388       if (pipe_fence)
1389          return screen->fence_finish(screen, pipe_fence, timeout);
1390       else
1391          return driscreen->opencl_dri_event_wait(fence->cl_event, timeout);
1392    }
1393    else {
1394       assert(0);
1395       return false;
1396    }
1397 }
1398
1399 static void
1400 dri2_server_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags)
1401 {
1402    /* AFAIK, no driver currently supports parallel context execution. */
1403 }
1404
1405 static __DRI2fenceExtension dri2FenceExtension = {
1406    .base = { __DRI2_FENCE, 1 },
1407
1408    .create_fence = dri2_create_fence,
1409    .get_fence_from_cl_event = dri2_get_fence_from_cl_event,
1410    .destroy_fence = dri2_destroy_fence,
1411    .client_wait_sync = dri2_client_wait_sync,
1412    .server_wait_sync = dri2_server_wait_sync
1413 };
1414
1415 static const __DRIrobustnessExtension dri2Robustness = {
1416    .base = { __DRI2_ROBUSTNESS, 1 }
1417 };
1418
1419 /*
1420  * Backend function init_screen.
1421  */
1422
1423 static const __DRIextension *dri_screen_extensions[] = {
1424    &driTexBufferExtension.base,
1425    &dri2FlushExtension.base,
1426    &dri2ImageExtension.base,
1427    &dri2RendererQueryExtension.base,
1428    &dri2ConfigQueryExtension.base,
1429    &dri2ThrottleExtension.base,
1430    &dri2FenceExtension.base,
1431    NULL
1432 };
1433
1434 static const __DRIextension *dri_robust_screen_extensions[] = {
1435    &driTexBufferExtension.base,
1436    &dri2FlushExtension.base,
1437    &dri2ImageExtension.base,
1438    &dri2RendererQueryExtension.base,
1439    &dri2ConfigQueryExtension.base,
1440    &dri2ThrottleExtension.base,
1441    &dri2FenceExtension.base,
1442    &dri2Robustness.base,
1443    NULL
1444 };
1445
1446 /**
1447  * This is the driver specific part of the createNewScreen entry point.
1448  *
1449  * Returns the struct gl_config supported by this driver.
1450  */
1451 static const __DRIconfig **
1452 dri2_init_screen(__DRIscreen * sPriv)
1453 {
1454    const __DRIconfig **configs;
1455    struct dri_screen *screen;
1456    struct pipe_screen *pscreen = NULL;
1457    const struct drm_conf_ret *throttle_ret;
1458    const struct drm_conf_ret *dmabuf_ret;
1459    int fd = -1;
1460
1461    screen = CALLOC_STRUCT(dri_screen);
1462    if (!screen)
1463       return NULL;
1464
1465    screen->sPriv = sPriv;
1466    screen->fd = sPriv->fd;
1467    pipe_mutex_init(screen->opencl_func_mutex);
1468
1469    sPriv->driverPrivate = (void *)screen;
1470
1471    if (screen->fd < 0 || (fd = dup(screen->fd)) < 0)
1472       goto fail;
1473
1474    if (pipe_loader_drm_probe_fd(&screen->dev, fd))
1475       pscreen = pipe_loader_create_screen(screen->dev);
1476
1477    if (!pscreen)
1478        goto fail;
1479
1480    throttle_ret = pipe_loader_configuration(screen->dev, DRM_CONF_THROTTLE);
1481    dmabuf_ret = pipe_loader_configuration(screen->dev, DRM_CONF_SHARE_FD);
1482
1483    if (throttle_ret && throttle_ret->val.val_int != -1) {
1484       screen->throttling_enabled = TRUE;
1485       screen->default_throttle_frames = throttle_ret->val.val_int;
1486    }
1487
1488    if (dmabuf_ret && dmabuf_ret->val.val_bool) {
1489       uint64_t cap;
1490
1491       if (drmGetCap(sPriv->fd, DRM_CAP_PRIME, &cap) == 0 &&
1492           (cap & DRM_PRIME_CAP_IMPORT)) {
1493          dri2ImageExtension.createImageFromFds = dri2_from_fds;
1494          dri2ImageExtension.createImageFromDmaBufs = dri2_from_dma_bufs;
1495       }
1496    }
1497
1498    if (pscreen->get_param(pscreen, PIPE_CAP_DEVICE_RESET_STATUS_QUERY)) {
1499       sPriv->extensions = dri_robust_screen_extensions;
1500       screen->has_reset_status_query = true;
1501    }
1502    else
1503       sPriv->extensions = dri_screen_extensions;
1504
1505    configs = dri_init_screen_helper(screen, pscreen, screen->dev->driver_name);
1506    if (!configs)
1507       goto fail;
1508
1509    screen->can_share_buffer = true;
1510    screen->auto_fake_front = dri_with_format(sPriv);
1511    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
1512    screen->lookup_egl_image = dri2_lookup_egl_image;
1513
1514    return configs;
1515 fail:
1516    dri_destroy_screen_helper(screen);
1517    if (screen->dev)
1518       pipe_loader_release(&screen->dev, 1);
1519    else
1520       close(fd);
1521    FREE(screen);
1522    return NULL;
1523 }
1524
1525 /**
1526  * This is the driver specific part of the createNewScreen entry point.
1527  *
1528  * Returns the struct gl_config supported by this driver.
1529  */
1530 static const __DRIconfig **
1531 dri_kms_init_screen(__DRIscreen * sPriv)
1532 {
1533 #if defined(GALLIUM_SOFTPIPE)
1534    const __DRIconfig **configs;
1535    struct dri_screen *screen;
1536    struct pipe_screen *pscreen = NULL;
1537    uint64_t cap;
1538    int fd = -1;
1539
1540    screen = CALLOC_STRUCT(dri_screen);
1541    if (!screen)
1542       return NULL;
1543
1544    screen->sPriv = sPriv;
1545    screen->fd = sPriv->fd;
1546
1547    sPriv->driverPrivate = (void *)screen;
1548
1549    if (screen->fd < 0 || (fd = dup(screen->fd)) < 0)
1550       goto fail;
1551
1552    if (pipe_loader_sw_probe_kms(&screen->dev, fd))
1553       pscreen = pipe_loader_create_screen(screen->dev);
1554
1555    if (!pscreen)
1556        goto fail;
1557
1558    if (drmGetCap(sPriv->fd, DRM_CAP_PRIME, &cap) == 0 &&
1559           (cap & DRM_PRIME_CAP_IMPORT)) {
1560       dri2ImageExtension.createImageFromFds = dri2_from_fds;
1561       dri2ImageExtension.createImageFromDmaBufs = dri2_from_dma_bufs;
1562    }
1563
1564    sPriv->extensions = dri_screen_extensions;
1565
1566    configs = dri_init_screen_helper(screen, pscreen, "swrast");
1567    if (!configs)
1568       goto fail;
1569
1570    screen->can_share_buffer = false;
1571    screen->auto_fake_front = dri_with_format(sPriv);
1572    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
1573    screen->lookup_egl_image = dri2_lookup_egl_image;
1574
1575    return configs;
1576 fail:
1577    dri_destroy_screen_helper(screen);
1578    if (screen->dev)
1579       pipe_loader_release(&screen->dev, 1);
1580    else
1581       close(fd);
1582    FREE(screen);
1583 #endif // GALLIUM_SOFTPIPE
1584    return NULL;
1585 }
1586
1587 static boolean
1588 dri2_create_buffer(__DRIscreen * sPriv,
1589                    __DRIdrawable * dPriv,
1590                    const struct gl_config * visual, boolean isPixmap)
1591 {
1592    struct dri_drawable *drawable = NULL;
1593
1594    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
1595       return FALSE;
1596
1597    drawable = dPriv->driverPrivate;
1598
1599    drawable->allocate_textures = dri2_allocate_textures;
1600    drawable->flush_frontbuffer = dri2_flush_frontbuffer;
1601    drawable->update_tex_buffer = dri2_update_tex_buffer;
1602
1603    return TRUE;
1604 }
1605
1606 /**
1607  * DRI driver virtual function table.
1608  *
1609  * DRI versions differ in their implementation of init_screen and swap_buffers.
1610  */
1611 const struct __DriverAPIRec galliumdrm_driver_api = {
1612    .InitScreen = dri2_init_screen,
1613    .DestroyScreen = dri_destroy_screen,
1614    .CreateContext = dri_create_context,
1615    .DestroyContext = dri_destroy_context,
1616    .CreateBuffer = dri2_create_buffer,
1617    .DestroyBuffer = dri_destroy_buffer,
1618    .MakeCurrent = dri_make_current,
1619    .UnbindContext = dri_unbind_context,
1620
1621    .AllocateBuffer = dri2_allocate_buffer,
1622    .ReleaseBuffer  = dri2_release_buffer,
1623 };
1624
1625 /**
1626  * DRI driver virtual function table.
1627  *
1628  * KMS/DRM version of the DriverAPI above sporting a different InitScreen
1629  * hook. The latter is used to explicitly initialise the kms_swrast driver
1630  * rather than selecting the approapriate driver as suggested by the loader.
1631  */
1632 const struct __DriverAPIRec dri_kms_driver_api = {
1633    .InitScreen = dri_kms_init_screen,
1634    .DestroyScreen = dri_destroy_screen,
1635    .CreateContext = dri_create_context,
1636    .DestroyContext = dri_destroy_context,
1637    .CreateBuffer = dri2_create_buffer,
1638    .DestroyBuffer = dri_destroy_buffer,
1639    .MakeCurrent = dri_make_current,
1640    .UnbindContext = dri_unbind_context,
1641
1642    .AllocateBuffer = dri2_allocate_buffer,
1643    .ReleaseBuffer  = dri2_release_buffer,
1644 };
1645
1646 /* This is the table of extensions that the loader will dlsym() for. */
1647 const __DRIextension *galliumdrm_driver_extensions[] = {
1648     &driCoreExtension.base,
1649     &driImageDriverExtension.base,
1650     &driDRI2Extension.base,
1651     &gallium_config_options.base,
1652     NULL
1653 };
1654
1655 /* vim: set sw=3 ts=8 sts=3 expandtab: */