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