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          PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ);
 359
 360    buffer->base.attachment = attachment;
 361    buffer->base.name = whandle.handle;
 362    buffer->base.cpp = util_format_get_blocksize(pf);
 363    buffer->base.pitch = whandle.stride;
 364
 365    return &buffer->base;
 366 }
 367
 368 static void
 369 dri2_release_buffer(__DRIscreen *sPriv, __DRIbuffer *bPriv)
 370 {
 371    struct dri2_buffer *buffer = dri2_buffer(bPriv);
 372
 373    pipe_resource_reference(&buffer->resource, NULL);
 374    FREE(buffer);
 375 }
 376
 377 /*
 378  * Backend functions for st_framebuffer interface.
 379  */
 380
 381 static void
 382 dri2_allocate_textures(struct dri_context *ctx,
 383                        struct dri_drawable *drawable,
 384                        const enum st_attachment_type *statts,
 385                        unsigned statts_count)
 386 {
 387    __DRIscreen *sPriv = drawable->sPriv;
 388    __DRIdrawable *dri_drawable = drawable->dPriv;
 389    struct dri_screen *screen = dri_screen(sPriv);
 390    struct pipe_resource templ;
 391    boolean alloc_depthstencil = FALSE;
 392    unsigned i, j, bind;
 393    const __DRIimageLoaderExtension *image = sPriv->image.loader;
 394    /* Image specific variables */
 395    struct __DRIimageList images;
 396    /* Dri2 specific variables */
 397    __DRIbuffer *buffers = NULL;
 398    struct winsys_handle whandle;
 399    unsigned num_buffers = statts_count;
 400
 401    /* First get the buffers from the loader */
 402    if (image) {
 403       if (!dri_image_drawable_get_buffers(drawable, &images,
 404                                           statts, statts_count))
 405          return;
 406    }
 407    else {
 408       buffers = dri2_drawable_get_buffers(drawable, statts, &num_buffers);
 409       if (!buffers || (drawable->old_num == num_buffers &&
 410                        drawable->old_w == dri_drawable->w &&
 411                        drawable->old_h == dri_drawable->h &&
 412                        memcmp(drawable->old, buffers,
 413                               sizeof(__DRIbuffer) * num_buffers) == 0))
 414          return;
 415    }
 416
 417    /* Second clean useless resources*/
 418
 419    /* See if we need a depth-stencil buffer. */
 420    for (i = 0; i < statts_count; i++) {
 421       if (statts[i] == ST_ATTACHMENT_DEPTH_STENCIL) {
 422          alloc_depthstencil = TRUE;
 423          break;
 424       }
 425    }
 426
 427    /* Delete the resources we won't need. */
 428    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 429       /* Don't delete the depth-stencil buffer, we can reuse it. */
 430       if (i == ST_ATTACHMENT_DEPTH_STENCIL && alloc_depthstencil)
 431          continue;
 432
 433       /* Flush the texture before unreferencing, so that other clients can
 434        * see what the driver has rendered.
 435        */
 436       if (i != ST_ATTACHMENT_DEPTH_STENCIL && drawable->textures[i]) {
 437          struct pipe_context *pipe = ctx->st->pipe;
 438          pipe->flush_resource(pipe, drawable->textures[i]);
 439       }
 440
 441       pipe_resource_reference(&drawable->textures[i], NULL);
 442    }
 443
 444    if (drawable->stvis.samples > 1) {
 445       for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 446          boolean del = TRUE;
 447
 448          /* Don't delete MSAA resources for the attachments which are enabled,
 449           * we can reuse them. */
 450          for (j = 0; j < statts_count; j++) {
 451             if (i == statts[j]) {
 452                del = FALSE;
 453                break;
 454             }
 455          }
 456
 457          if (del) {
 458             pipe_resource_reference(&drawable->msaa_textures[i], NULL);
 459          }
 460       }
 461    }
 462
 463    /* Third use the buffers retrieved to fill the drawable info */
 464
 465    memset(&templ, 0, sizeof(templ));
 466    templ.target = screen->target;
 467    templ.last_level = 0;
 468    templ.depth0 = 1;
 469    templ.array_size = 1;
 470
 471    if (image) {
 472       if (images.image_mask & __DRI_IMAGE_BUFFER_FRONT) {
 473          struct pipe_resource **buf =
 474             &drawable->textures[ST_ATTACHMENT_FRONT_LEFT];
 475          struct pipe_resource *texture = images.front->texture;
 476
 477          dri_drawable->w = texture->width0;
 478          dri_drawable->h = texture->height0;
 479
 480          pipe_resource_reference(buf, texture);
 481       }
 482
 483       if (images.image_mask & __DRI_IMAGE_BUFFER_BACK) {
 484          struct pipe_resource **buf =
 485             &drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 486          struct pipe_resource *texture = images.back->texture;
 487
 488          dri_drawable->w = texture->width0;
 489          dri_drawable->h = texture->height0;
 490
 491          pipe_resource_reference(buf, texture);
 492       }
 493
 494       /* Note: if there is both a back and a front buffer,
 495        * then they have the same size.
 496        */
 497       templ.width0 = dri_drawable->w;
 498       templ.height0 = dri_drawable->h;
 499    }
 500    else {
 501       memset(&whandle, 0, sizeof(whandle));
 502
 503       /* Process DRI-provided buffers and get pipe_resources. */
 504       for (i = 0; i < num_buffers; i++) {
 505          __DRIbuffer *buf = &buffers[i];
 506          enum st_attachment_type statt;
 507          enum pipe_format format;
 508
 509          switch (buf->attachment) {
 510          case __DRI_BUFFER_FRONT_LEFT:
 511             if (!screen->auto_fake_front) {
 512                continue; /* invalid attachment */
 513             }
 514             /* fallthrough */
 515          case __DRI_BUFFER_FAKE_FRONT_LEFT:
 516             statt = ST_ATTACHMENT_FRONT_LEFT;
 517             break;
 518          case __DRI_BUFFER_BACK_LEFT:
 519             statt = ST_ATTACHMENT_BACK_LEFT;
 520             break;
 521          default:
 522             continue; /* invalid attachment */
 523          }
 524
 525          dri_drawable_get_format(drawable, statt, &format, &bind);
 526          if (format == PIPE_FORMAT_NONE)
 527             continue;
 528
 529          /* dri2_drawable_get_buffers has already filled dri_drawable->w
 530           * and dri_drawable->h */
 531          templ.width0 = dri_drawable->w;
 532          templ.height0 = dri_drawable->h;
 533          templ.format = format;
 534          templ.bind = bind;
 535          whandle.handle = buf->name;
 536          whandle.stride = buf->pitch;
 537          whandle.offset = 0;
 538          if (screen->can_share_buffer)
 539             whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 540          else
 541             whandle.type = DRM_API_HANDLE_TYPE_KMS;
 542          drawable->textures[statt] =
 543             screen->base.screen->resource_from_handle(screen->base.screen,
 544                   &templ, &whandle,
 545                   PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ);
 546          assert(drawable->textures[statt]);
 547       }
 548    }
 549
 550    /* Allocate private MSAA colorbuffers. */
 551    if (drawable->stvis.samples > 1) {
 552       for (i = 0; i < statts_count; i++) {
 553          enum st_attachment_type statt = statts[i];
 554
 555          if (statt == ST_ATTACHMENT_DEPTH_STENCIL)
 556             continue;
 557
 558          if (drawable->textures[statt]) {
 559             templ.format = drawable->textures[statt]->format;
 560             templ.bind = drawable->textures[statt]->bind & ~PIPE_BIND_SCANOUT;
 561             templ.nr_samples = drawable->stvis.samples;
 562
 563             /* Try to reuse the resource.
 564              * (the other resource parameters should be constant)
 565              */
 566             if (!drawable->msaa_textures[statt] ||
 567                 drawable->msaa_textures[statt]->width0 != templ.width0 ||
 568                 drawable->msaa_textures[statt]->height0 != templ.height0) {
 569                /* Allocate a new one. */
 570                pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 571
 572                drawable->msaa_textures[statt] =
 573                   screen->base.screen->resource_create(screen->base.screen,
 574                                                        &templ);
 575                assert(drawable->msaa_textures[statt]);
 576
 577                /* If there are any MSAA resources, we should initialize them
 578                 * such that they contain the same data as the single-sample
 579                 * resources we just got from the X server.
 580                 *
 581                 * The reason for this is that the state tracker (and
 582                 * therefore the app) can access the MSAA resources only.
 583                 * The single-sample resources are not exposed
 584                 * to the state tracker.
 585                 *
 586                 */
 587                dri_pipe_blit(ctx->st->pipe,
 588                              drawable->msaa_textures[statt],
 589                              drawable->textures[statt]);
 590             }
 591          }
 592          else {
 593             pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 594          }
 595       }
 596    }
 597
 598    /* Allocate a private depth-stencil buffer. */
 599    if (alloc_depthstencil) {
 600       enum st_attachment_type statt = ST_ATTACHMENT_DEPTH_STENCIL;
 601       struct pipe_resource **zsbuf;
 602       enum pipe_format format;
 603       unsigned bind;
 604
 605       dri_drawable_get_format(drawable, statt, &format, &bind);
 606
 607       if (format) {
 608          templ.format = format;
 609          templ.bind = bind;
 610
 611          if (drawable->stvis.samples > 1) {
 612             templ.nr_samples = drawable->stvis.samples;
 613             zsbuf = &drawable->msaa_textures[statt];
 614          }
 615          else {
 616             templ.nr_samples = 0;
 617             zsbuf = &drawable->textures[statt];
 618          }
 619
 620          /* Try to reuse the resource.
 621           * (the other resource parameters should be constant)
 622           */
 623          if (!*zsbuf ||
 624              (*zsbuf)->width0 != templ.width0 ||
 625              (*zsbuf)->height0 != templ.height0) {
 626             /* Allocate a new one. */
 627             pipe_resource_reference(zsbuf, NULL);
 628             *zsbuf = screen->base.screen->resource_create(screen->base.screen,
 629                                                           &templ);
 630             assert(*zsbuf);
 631          }
 632       }
 633       else {
 634          pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 635          pipe_resource_reference(&drawable->textures[statt], NULL);
 636       }
 637    }
 638
 639    /* For DRI2, we may get the same buffers again from the server.
 640     * To prevent useless imports of gem names, drawable->old* is used
 641     * to bypass the import if we get the same buffers. This doesn't apply
 642     * to DRI3/Wayland, users of image.loader, since the buffer is managed
 643     * by the client (no import), and the back buffer is going to change
 644     * at every redraw.
 645     */
 646    if (!image) {
 647       drawable->old_num = num_buffers;
 648       drawable->old_w = dri_drawable->w;
 649       drawable->old_h = dri_drawable->h;
 650       memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * num_buffers);
 651    }
 652 }
 653
 654 static void
 655 dri2_flush_frontbuffer(struct dri_context *ctx,
 656                        struct dri_drawable *drawable,
 657                        enum st_attachment_type statt)
 658 {
 659    __DRIdrawable *dri_drawable = drawable->dPriv;
 660    const __DRIimageLoaderExtension *image = drawable->sPriv->image.loader;
 661    const __DRIdri2LoaderExtension *loader = drawable->sPriv->dri2.loader;
 662    struct pipe_context *pipe = ctx->st->pipe;
 663
 664    if (statt != ST_ATTACHMENT_FRONT_LEFT)
 665       return;
 666
 667    if (drawable->stvis.samples > 1) {
 668       /* Resolve the front buffer. */
 669       dri_pipe_blit(ctx->st->pipe,
 670                     drawable->textures[ST_ATTACHMENT_FRONT_LEFT],
 671                     drawable->msaa_textures[ST_ATTACHMENT_FRONT_LEFT]);
 672    }
 673
 674    if (drawable->textures[ST_ATTACHMENT_FRONT_LEFT]) {
 675       pipe->flush_resource(pipe, drawable->textures[ST_ATTACHMENT_FRONT_LEFT]);
 676    }
 677
 678    pipe->flush(pipe, NULL, 0);
 679
 680    if (image) {
 681       image->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 682    }
 683    else if (loader->flushFrontBuffer) {
 684       loader->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 685    }
 686 }
 687
 688 static void
 689 dri2_update_tex_buffer(struct dri_drawable *drawable,
 690                        struct dri_context *ctx,
 691                        struct pipe_resource *res)
 692 {
 693    /* no-op */
 694 }
 695
 696 static __DRIimage *
 697 dri2_lookup_egl_image(struct dri_screen *screen, void *handle)
 698 {
 699    const __DRIimageLookupExtension *loader = screen->sPriv->dri2.image;
 700    __DRIimage *img;
 701
 702    if (!loader->lookupEGLImage)
 703       return NULL;
 704
 705    img = loader->lookupEGLImage(screen->sPriv,
 706                                 handle, screen->sPriv->loaderPrivate);
 707
 708    return img;
 709 }
 710
 711 static __DRIimage *
 712 dri2_create_image_from_winsys(__DRIscreen *_screen,
 713                               int width, int height, int format,
 714                               struct winsys_handle *whandle, int pitch,
 715                               void *loaderPrivate)
 716 {
 717    struct dri_screen *screen = dri_screen(_screen);
 718    __DRIimage *img;
 719    struct pipe_resource templ;
 720    unsigned tex_usage;
 721    enum pipe_format pf;
 722
 723    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 724
 725    switch (format) {
 726    case __DRI_IMAGE_FORMAT_RGB565:
 727       pf = PIPE_FORMAT_B5G6R5_UNORM;
 728       break;
 729    case __DRI_IMAGE_FORMAT_XRGB8888:
 730       pf = PIPE_FORMAT_BGRX8888_UNORM;
 731       break;
 732    case __DRI_IMAGE_FORMAT_ARGB8888:
 733       pf = PIPE_FORMAT_BGRA8888_UNORM;
 734       break;
 735    case __DRI_IMAGE_FORMAT_ABGR8888:
 736       pf = PIPE_FORMAT_RGBA8888_UNORM;
 737       break;
 738    default:
 739       pf = PIPE_FORMAT_NONE;
 740       break;
 741    }
 742    if (pf == PIPE_FORMAT_NONE)
 743       return NULL;
 744
 745    img = CALLOC_STRUCT(__DRIimageRec);
 746    if (!img)
 747       return NULL;
 748
 749    memset(&templ, 0, sizeof(templ));
 750    templ.bind = tex_usage;
 751    templ.format = pf;
 752    templ.target = screen->target;
 753    templ.last_level = 0;
 754    templ.width0 = width;
 755    templ.height0 = height;
 756    templ.depth0 = 1;
 757    templ.array_size = 1;
 758
 759    whandle->stride = pitch * util_format_get_blocksize(pf);
 760    whandle->offset = 0;
 761
 762    img->texture = screen->base.screen->resource_from_handle(screen->base.screen,
 763          &templ, whandle, PIPE_HANDLE_USAGE_READ_WRITE);
 764    if (!img->texture) {
 765       FREE(img);
 766       return NULL;
 767    }
 768
 769    img->level = 0;
 770    img->layer = 0;
 771    img->dri_format = format;
 772    img->use = 0;
 773    img->loader_private = loaderPrivate;
 774
 775    return img;
 776 }
 777
 778 static __DRIimage *
 779 dri2_create_image_from_name(__DRIscreen *_screen,
 780                             int width, int height, int format,
 781                             int name, int pitch, void *loaderPrivate)
 782 {
 783    struct winsys_handle whandle;
 784
 785    memset(&whandle, 0, sizeof(whandle));
 786    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 787    whandle.handle = name;
 788
 789    return dri2_create_image_from_winsys(_screen, width, height, format,
 790                                         &whandle, pitch, loaderPrivate);
 791 }
 792
 793 static __DRIimage *
 794 dri2_create_image_from_fd(__DRIscreen *_screen,
 795                           int width, int height, int format,
 796                           int fd, int pitch, void *loaderPrivate)
 797 {
 798    struct winsys_handle whandle;
 799
 800    if (fd < 0)
 801       return NULL;
 802
 803    memset(&whandle, 0, sizeof(whandle));
 804    whandle.type = DRM_API_HANDLE_TYPE_FD;
 805    whandle.handle = (unsigned)fd;
 806
 807    return dri2_create_image_from_winsys(_screen, width, height, format,
 808                                         &whandle, pitch, loaderPrivate);
 809 }
 810
 811 static __DRIimage *
 812 dri2_create_image_from_renderbuffer(__DRIcontext *context,
 813                                     int renderbuffer, void *loaderPrivate)
 814 {
 815    struct dri_context *ctx = dri_context(context);
 816
 817    if (!ctx->st->get_resource_for_egl_image)
 818       return NULL;
 819
 820    /* TODO */
 821    return NULL;
 822 }
 823
 824 static __DRIimage *
 825 dri2_create_image(__DRIscreen *_screen,
 826                    int width, int height, int format,
 827                    unsigned int use, void *loaderPrivate)
 828 {
 829    struct dri_screen *screen = dri_screen(_screen);
 830    __DRIimage *img;
 831    struct pipe_resource templ;
 832    unsigned tex_usage;
 833    enum pipe_format pf;
 834
 835    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 836    if (use & __DRI_IMAGE_USE_SCANOUT)
 837       tex_usage |= PIPE_BIND_SCANOUT;
 838    if (use & __DRI_IMAGE_USE_SHARE)
 839       tex_usage |= PIPE_BIND_SHARED;
 840    if (use & __DRI_IMAGE_USE_LINEAR)
 841       tex_usage |= PIPE_BIND_LINEAR;
 842    if (use & __DRI_IMAGE_USE_CURSOR) {
 843       if (width != 64 || height != 64)
 844          return NULL;
 845       tex_usage |= PIPE_BIND_CURSOR;
 846    }
 847
 848    switch (format) {
 849    case __DRI_IMAGE_FORMAT_RGB565:
 850       pf = PIPE_FORMAT_B5G6R5_UNORM;
 851       break;
 852    case __DRI_IMAGE_FORMAT_XRGB8888:
 853       pf = PIPE_FORMAT_BGRX8888_UNORM;
 854       break;
 855    case __DRI_IMAGE_FORMAT_ARGB8888:
 856       pf = PIPE_FORMAT_BGRA8888_UNORM;
 857       break;
 858    case __DRI_IMAGE_FORMAT_ABGR8888:
 859       pf = PIPE_FORMAT_RGBA8888_UNORM;
 860       break;
 861    default:
 862       pf = PIPE_FORMAT_NONE;
 863       break;
 864    }
 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 stride, dri_components;
1003
1004    if (num_names != 1)
1005       return NULL;
1006    if (offsets[0] != 0)
1007       return NULL;
1008
1009    format = convert_fourcc(format, &dri_components);
1010    if (format == -1)
1011       return NULL;
1012
1013    /* Strides are in bytes not pixels. */
1014    stride = strides[0] /4;
1015
1016    img = dri2_create_image_from_name(screen, width, height, format,
1017                                      names[0], stride, loaderPrivate);
1018    if (img == NULL)
1019       return NULL;
1020
1021    img->dri_components = dri_components;
1022    return img;
1023 }
1024
1025 static __DRIimage *
1026 dri2_from_planar(__DRIimage *image, int plane, void *loaderPrivate)
1027 {
1028    __DRIimage *img;
1029
1030    if (plane != 0)
1031       return NULL;
1032
1033    if (image->dri_components == 0)
1034       return NULL;
1035
1036    img = dri2_dup_image(image, loaderPrivate);
1037    if (img == NULL)
1038       return NULL;
1039
1040    /* set this to 0 for sub images. */
1041    img->dri_components = 0;
1042    return img;
1043 }
1044
1045 static __DRIimage *
1046 dri2_create_from_texture(__DRIcontext *context, int target, unsigned texture,
1047                          int depth, int level, unsigned *error,
1048                          void *loaderPrivate)
1049 {
1050    __DRIimage *img;
1051    struct gl_context *ctx = ((struct st_context *)dri_context(context)->st)->ctx;
1052    struct gl_texture_object *obj;
1053    struct pipe_resource *tex;
1054    GLuint face = 0;
1055
1056    obj = _mesa_lookup_texture(ctx, texture);
1057    if (!obj || obj->Target != target) {
1058       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1059       return NULL;
1060    }
1061
1062    tex = st_get_texobj_resource(obj);
1063    if (!tex) {
1064       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1065       return NULL;
1066    }
1067
1068    if (target == GL_TEXTURE_CUBE_MAP)
1069       face = depth;
1070
1071    _mesa_test_texobj_completeness(ctx, obj);
1072    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
1073       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1074       return NULL;
1075    }
1076
1077    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
1078       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1079       return NULL;
1080    }
1081
1082    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < depth) {
1083       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1084       return NULL;
1085    }
1086
1087    img = CALLOC_STRUCT(__DRIimageRec);
1088    if (!img) {
1089       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
1090       return NULL;
1091    }
1092
1093    img->level = level;
1094    img->layer = depth;
1095    img->dri_format = driGLFormatToImageFormat(obj->Image[face][level]->TexFormat);
1096
1097    img->loader_private = loaderPrivate;
1098
1099    if (img->dri_format == __DRI_IMAGE_FORMAT_NONE) {
1100       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1101       free(img);
1102       return NULL;
1103    }
1104
1105    pipe_resource_reference(&img->texture, tex);
1106
1107    *error = __DRI_IMAGE_ERROR_SUCCESS;
1108    return img;
1109 }
1110
1111 static __DRIimage *
1112 dri2_from_fds(__DRIscreen *screen, int width, int height, int fourcc,
1113               int *fds, int num_fds, int *strides, int *offsets,
1114               void *loaderPrivate)
1115 {
1116    __DRIimage *img;
1117    int format, stride, dri_components;
1118
1119    if (num_fds != 1)
1120       return NULL;
1121    if (offsets[0] != 0)
1122       return NULL;
1123
1124    format = convert_fourcc(fourcc, &dri_components);
1125    if (format == -1)
1126       return NULL;
1127
1128    /* Strides are in bytes not pixels. */
1129    stride = strides[0] /4;
1130
1131    img = dri2_create_image_from_fd(screen, width, height, format,
1132                                    fds[0], stride, 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, stride, 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    /* Strides are in bytes not pixels. */
1167    stride = strides[0] /4;
1168
1169    img = dri2_create_image_from_fd(screen, width, height, format,
1170                                    fds[0], stride, loaderPrivate);
1171    if (img == NULL) {
1172       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
1173       return NULL;
1174    }
1175
1176    img->yuv_color_space = yuv_color_space;
1177    img->sample_range = sample_range;
1178    img->horizontal_siting = horizontal_siting;
1179    img->vertical_siting = vertical_siting;
1180    img->dri_components = dri_components;
1181
1182    *error = __DRI_IMAGE_ERROR_SUCCESS;
1183    return img;
1184 }
1185
1186 static void
1187 dri2_blit_image(__DRIcontext *context, __DRIimage *dst, __DRIimage *src,
1188                 int dstx0, int dsty0, int dstwidth, int dstheight,
1189                 int srcx0, int srcy0, int srcwidth, int srcheight,
1190                 int flush_flag)
1191 {
1192    struct dri_context *ctx = dri_context(context);
1193    struct pipe_context *pipe = ctx->st->pipe;
1194    struct pipe_screen *screen;
1195    struct pipe_fence_handle *fence;
1196    struct pipe_blit_info blit;
1197
1198    if (!dst || !src)
1199       return;
1200
1201    memset(&blit, 0, sizeof(blit));
1202    blit.dst.resource = dst->texture;
1203    blit.dst.box.x = dstx0;
1204    blit.dst.box.y = dsty0;
1205    blit.dst.box.width = dstwidth;
1206    blit.dst.box.height = dstheight;
1207    blit.dst.box.depth = 1;
1208    blit.dst.format = dst->texture->format;
1209    blit.src.resource = src->texture;
1210    blit.src.box.x = srcx0;
1211    blit.src.box.y = srcy0;
1212    blit.src.box.width = srcwidth;
1213    blit.src.box.height = srcheight;
1214    blit.src.box.depth = 1;
1215    blit.src.format = src->texture->format;
1216    blit.mask = PIPE_MASK_RGBA;
1217    blit.filter = PIPE_TEX_FILTER_NEAREST;
1218
1219    pipe->blit(pipe, &blit);
1220
1221    if (flush_flag == __BLIT_FLAG_FLUSH) {
1222       pipe->flush_resource(pipe, dst->texture);
1223       ctx->st->flush(ctx->st, 0, NULL);
1224    } else if (flush_flag == __BLIT_FLAG_FINISH) {
1225       screen = dri_screen(ctx->sPriv)->base.screen;
1226       pipe->flush_resource(pipe, dst->texture);
1227       ctx->st->flush(ctx->st, 0, &fence);
1228       (void) screen->fence_finish(screen, fence, PIPE_TIMEOUT_INFINITE);
1229       screen->fence_reference(screen, &fence, NULL);
1230    }
1231 }
1232
1233 static void
1234 dri2_destroy_image(__DRIimage *img)
1235 {
1236    pipe_resource_reference(&img->texture, NULL);
1237    FREE(img);
1238 }
1239
1240 static int
1241 dri2_get_capabilities(__DRIscreen *_screen)
1242 {
1243    struct dri_screen *screen = dri_screen(_screen);
1244
1245    return (screen->can_share_buffer ? __DRI_IMAGE_CAP_GLOBAL_NAMES : 0);
1246 }
1247
1248 /* The extension is modified during runtime if DRI_PRIME is detected */
1249 static __DRIimageExtension dri2ImageExtension = {
1250     .base = { __DRI_IMAGE, 11 },
1251
1252     .createImageFromName          = dri2_create_image_from_name,
1253     .createImageFromRenderbuffer  = dri2_create_image_from_renderbuffer,
1254     .destroyImage                 = dri2_destroy_image,
1255     .createImage                  = dri2_create_image,
1256     .queryImage                   = dri2_query_image,
1257     .dupImage                     = dri2_dup_image,
1258     .validateUsage                = dri2_validate_usage,
1259     .createImageFromNames         = dri2_from_names,
1260     .fromPlanar                   = dri2_from_planar,
1261     .createImageFromTexture       = dri2_create_from_texture,
1262     .createImageFromFds           = NULL,
1263     .createImageFromDmaBufs       = NULL,
1264     .blitImage                    = dri2_blit_image,
1265     .getCapabilities              = dri2_get_capabilities,
1266 };
1267
1268
1269 static bool
1270 dri2_is_opencl_interop_loaded_locked(struct dri_screen *screen)
1271 {
1272    return screen->opencl_dri_event_add_ref &&
1273           screen->opencl_dri_event_release &&
1274           screen->opencl_dri_event_wait &&
1275           screen->opencl_dri_event_get_fence;
1276 }
1277
1278 static bool
1279 dri2_load_opencl_interop(struct dri_screen *screen)
1280 {
1281 #if defined(RTLD_DEFAULT)
1282    bool success;
1283
1284    pipe_mutex_lock(screen->opencl_func_mutex);
1285
1286    if (dri2_is_opencl_interop_loaded_locked(screen)) {
1287       pipe_mutex_unlock(screen->opencl_func_mutex);
1288       return true;
1289    }
1290
1291    screen->opencl_dri_event_add_ref =
1292       dlsym(RTLD_DEFAULT, "opencl_dri_event_add_ref");
1293    screen->opencl_dri_event_release =
1294       dlsym(RTLD_DEFAULT, "opencl_dri_event_release");
1295    screen->opencl_dri_event_wait =
1296       dlsym(RTLD_DEFAULT, "opencl_dri_event_wait");
1297    screen->opencl_dri_event_get_fence =
1298       dlsym(RTLD_DEFAULT, "opencl_dri_event_get_fence");
1299
1300    success = dri2_is_opencl_interop_loaded_locked(screen);
1301    pipe_mutex_unlock(screen->opencl_func_mutex);
1302    return success;
1303 #else
1304    return false;
1305 #endif
1306 }
1307
1308 struct dri2_fence {
1309    struct dri_screen *driscreen;
1310    struct pipe_fence_handle *pipe_fence;
1311    void *cl_event;
1312 };
1313
1314 static void *
1315 dri2_create_fence(__DRIcontext *_ctx)
1316 {
1317    struct pipe_context *ctx = dri_context(_ctx)->st->pipe;
1318    struct dri2_fence *fence = CALLOC_STRUCT(dri2_fence);
1319
1320    if (!fence)
1321       return NULL;
1322
1323    ctx->flush(ctx, &fence->pipe_fence, 0);
1324
1325    if (!fence->pipe_fence) {
1326       FREE(fence);
1327       return NULL;
1328    }
1329
1330    fence->driscreen = dri_screen(_ctx->driScreenPriv);
1331    return fence;
1332 }
1333
1334 static void *
1335 dri2_get_fence_from_cl_event(__DRIscreen *_screen, intptr_t cl_event)
1336 {
1337    struct dri_screen *driscreen = dri_screen(_screen);
1338    struct dri2_fence *fence;
1339
1340    if (!dri2_load_opencl_interop(driscreen))
1341       return NULL;
1342
1343    fence = CALLOC_STRUCT(dri2_fence);
1344    if (!fence)
1345       return NULL;
1346
1347    fence->cl_event = (void*)cl_event;
1348
1349    if (!driscreen->opencl_dri_event_add_ref(fence->cl_event)) {
1350       free(fence);
1351       return NULL;
1352    }
1353
1354    fence->driscreen = driscreen;
1355    return fence;
1356 }
1357
1358 static void
1359 dri2_destroy_fence(__DRIscreen *_screen, void *_fence)
1360 {
1361    struct dri_screen *driscreen = dri_screen(_screen);
1362    struct pipe_screen *screen = driscreen->base.screen;
1363    struct dri2_fence *fence = (struct dri2_fence*)_fence;
1364
1365    if (fence->pipe_fence)
1366       screen->fence_reference(screen, &fence->pipe_fence, NULL);
1367    else if (fence->cl_event)
1368       driscreen->opencl_dri_event_release(fence->cl_event);
1369    else
1370       assert(0);
1371
1372    FREE(fence);
1373 }
1374
1375 static GLboolean
1376 dri2_client_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags,
1377                       uint64_t timeout)
1378 {
1379    struct dri2_fence *fence = (struct dri2_fence*)_fence;
1380    struct dri_screen *driscreen = fence->driscreen;
1381    struct pipe_screen *screen = driscreen->base.screen;
1382
1383    /* No need to flush. The context was flushed when the fence was created. */
1384
1385    if (fence->pipe_fence)
1386       return screen->fence_finish(screen, fence->pipe_fence, timeout);
1387    else if (fence->cl_event) {
1388       struct pipe_fence_handle *pipe_fence =
1389          driscreen->opencl_dri_event_get_fence(fence->cl_event);
1390
1391       if (pipe_fence)
1392          return screen->fence_finish(screen, pipe_fence, timeout);
1393       else
1394          return driscreen->opencl_dri_event_wait(fence->cl_event, timeout);
1395    }
1396    else {
1397       assert(0);
1398       return false;
1399    }
1400 }
1401
1402 static void
1403 dri2_server_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags)
1404 {
1405    /* AFAIK, no driver currently supports parallel context execution. */
1406 }
1407
1408 static __DRI2fenceExtension dri2FenceExtension = {
1409    .base = { __DRI2_FENCE, 1 },
1410
1411    .create_fence = dri2_create_fence,
1412    .get_fence_from_cl_event = dri2_get_fence_from_cl_event,
1413    .destroy_fence = dri2_destroy_fence,
1414    .client_wait_sync = dri2_client_wait_sync,
1415    .server_wait_sync = dri2_server_wait_sync
1416 };
1417
1418 static const __DRIrobustnessExtension dri2Robustness = {
1419    .base = { __DRI2_ROBUSTNESS, 1 }
1420 };
1421
1422 /*
1423  * Backend function init_screen.
1424  */
1425
1426 static const __DRIextension *dri_screen_extensions[] = {
1427    &driTexBufferExtension.base,
1428    &dri2FlushExtension.base,
1429    &dri2ImageExtension.base,
1430    &dri2RendererQueryExtension.base,
1431    &dri2ConfigQueryExtension.base,
1432    &dri2ThrottleExtension.base,
1433    &dri2FenceExtension.base,
1434    NULL
1435 };
1436
1437 static const __DRIextension *dri_robust_screen_extensions[] = {
1438    &driTexBufferExtension.base,
1439    &dri2FlushExtension.base,
1440    &dri2ImageExtension.base,
1441    &dri2RendererQueryExtension.base,
1442    &dri2ConfigQueryExtension.base,
1443    &dri2ThrottleExtension.base,
1444    &dri2FenceExtension.base,
1445    &dri2Robustness.base,
1446    NULL
1447 };
1448
1449 /**
1450  * This is the driver specific part of the createNewScreen entry point.
1451  *
1452  * Returns the struct gl_config supported by this driver.
1453  */
1454 static const __DRIconfig **
1455 dri2_init_screen(__DRIscreen * sPriv)
1456 {
1457    const __DRIconfig **configs;
1458    struct dri_screen *screen;
1459    struct pipe_screen *pscreen = NULL;
1460    const struct drm_conf_ret *throttle_ret;
1461    const struct drm_conf_ret *dmabuf_ret;
1462    int fd = -1;
1463
1464    screen = CALLOC_STRUCT(dri_screen);
1465    if (!screen)
1466       return NULL;
1467
1468    screen->sPriv = sPriv;
1469    screen->fd = sPriv->fd;
1470    pipe_mutex_init(screen->opencl_func_mutex);
1471
1472    sPriv->driverPrivate = (void *)screen;
1473
1474    if (screen->fd < 0 || (fd = dup(screen->fd)) < 0)
1475       goto fail;
1476
1477    if (pipe_loader_drm_probe_fd(&screen->dev, fd))
1478       pscreen = pipe_loader_create_screen(screen->dev);
1479
1480    if (!pscreen)
1481        goto fail;
1482
1483    throttle_ret = pipe_loader_configuration(screen->dev, DRM_CONF_THROTTLE);
1484    dmabuf_ret = pipe_loader_configuration(screen->dev, DRM_CONF_SHARE_FD);
1485
1486    if (throttle_ret && throttle_ret->val.val_int != -1) {
1487       screen->throttling_enabled = TRUE;
1488       screen->default_throttle_frames = throttle_ret->val.val_int;
1489    }
1490
1491    if (dmabuf_ret && dmabuf_ret->val.val_bool) {
1492       uint64_t cap;
1493
1494       if (drmGetCap(sPriv->fd, DRM_CAP_PRIME, &cap) == 0 &&
1495           (cap & DRM_PRIME_CAP_IMPORT)) {
1496          dri2ImageExtension.createImageFromFds = dri2_from_fds;
1497          dri2ImageExtension.createImageFromDmaBufs = dri2_from_dma_bufs;
1498       }
1499    }
1500
1501    if (pscreen->get_param(pscreen, PIPE_CAP_DEVICE_RESET_STATUS_QUERY)) {
1502       sPriv->extensions = dri_robust_screen_extensions;
1503       screen->has_reset_status_query = true;
1504    }
1505    else
1506       sPriv->extensions = dri_screen_extensions;
1507
1508    configs = dri_init_screen_helper(screen, pscreen, screen->dev->driver_name);
1509    if (!configs)
1510       goto fail;
1511
1512    screen->can_share_buffer = true;
1513    screen->auto_fake_front = dri_with_format(sPriv);
1514    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
1515    screen->lookup_egl_image = dri2_lookup_egl_image;
1516
1517    return configs;
1518 fail:
1519    dri_destroy_screen_helper(screen);
1520    if (screen->dev)
1521       pipe_loader_release(&screen->dev, 1);
1522    else
1523       close(fd);
1524    FREE(screen);
1525    return NULL;
1526 }
1527
1528 /**
1529  * This is the driver specific part of the createNewScreen entry point.
1530  *
1531  * Returns the struct gl_config supported by this driver.
1532  */
1533 static const __DRIconfig **
1534 dri_kms_init_screen(__DRIscreen * sPriv)
1535 {
1536 #if defined(GALLIUM_SOFTPIPE)
1537    const __DRIconfig **configs;
1538    struct dri_screen *screen;
1539    struct pipe_screen *pscreen = NULL;
1540    uint64_t cap;
1541    int fd = -1;
1542
1543    screen = CALLOC_STRUCT(dri_screen);
1544    if (!screen)
1545       return NULL;
1546
1547    screen->sPriv = sPriv;
1548    screen->fd = sPriv->fd;
1549
1550    sPriv->driverPrivate = (void *)screen;
1551
1552    if (screen->fd < 0 || (fd = dup(screen->fd)) < 0)
1553       goto fail;
1554
1555    if (pipe_loader_sw_probe_kms(&screen->dev, fd))
1556       pscreen = pipe_loader_create_screen(screen->dev);
1557
1558    if (!pscreen)
1559        goto fail;
1560
1561    if (drmGetCap(sPriv->fd, DRM_CAP_PRIME, &cap) == 0 &&
1562           (cap & DRM_PRIME_CAP_IMPORT)) {
1563       dri2ImageExtension.createImageFromFds = dri2_from_fds;
1564       dri2ImageExtension.createImageFromDmaBufs = dri2_from_dma_bufs;
1565    }
1566
1567    sPriv->extensions = dri_screen_extensions;
1568
1569    configs = dri_init_screen_helper(screen, pscreen, "swrast");
1570    if (!configs)
1571       goto fail;
1572
1573    screen->can_share_buffer = false;
1574    screen->auto_fake_front = dri_with_format(sPriv);
1575    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
1576    screen->lookup_egl_image = dri2_lookup_egl_image;
1577
1578    return configs;
1579 fail:
1580    dri_destroy_screen_helper(screen);
1581    if (screen->dev)
1582       pipe_loader_release(&screen->dev, 1);
1583    else
1584       close(fd);
1585    FREE(screen);
1586 #endif // GALLIUM_SOFTPIPE
1587    return NULL;
1588 }
1589
1590 static boolean
1591 dri2_create_buffer(__DRIscreen * sPriv,
1592                    __DRIdrawable * dPriv,
1593                    const struct gl_config * visual, boolean isPixmap)
1594 {
1595    struct dri_drawable *drawable = NULL;
1596
1597    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
1598       return FALSE;
1599
1600    drawable = dPriv->driverPrivate;
1601
1602    drawable->allocate_textures = dri2_allocate_textures;
1603    drawable->flush_frontbuffer = dri2_flush_frontbuffer;
1604    drawable->update_tex_buffer = dri2_update_tex_buffer;
1605
1606    return TRUE;
1607 }
1608
1609 /**
1610  * DRI driver virtual function table.
1611  *
1612  * DRI versions differ in their implementation of init_screen and swap_buffers.
1613  */
1614 const struct __DriverAPIRec galliumdrm_driver_api = {
1615    .InitScreen = dri2_init_screen,
1616    .DestroyScreen = dri_destroy_screen,
1617    .CreateContext = dri_create_context,
1618    .DestroyContext = dri_destroy_context,
1619    .CreateBuffer = dri2_create_buffer,
1620    .DestroyBuffer = dri_destroy_buffer,
1621    .MakeCurrent = dri_make_current,
1622    .UnbindContext = dri_unbind_context,
1623
1624    .AllocateBuffer = dri2_allocate_buffer,
1625    .ReleaseBuffer  = dri2_release_buffer,
1626 };
1627
1628 /**
1629  * DRI driver virtual function table.
1630  *
1631  * KMS/DRM version of the DriverAPI above sporting a different InitScreen
1632  * hook. The latter is used to explicitly initialise the kms_swrast driver
1633  * rather than selecting the approapriate driver as suggested by the loader.
1634  */
1635 const struct __DriverAPIRec dri_kms_driver_api = {
1636    .InitScreen = dri_kms_init_screen,
1637    .DestroyScreen = dri_destroy_screen,
1638    .CreateContext = dri_create_context,
1639    .DestroyContext = dri_destroy_context,
1640    .CreateBuffer = dri2_create_buffer,
1641    .DestroyBuffer = dri_destroy_buffer,
1642    .MakeCurrent = dri_make_current,
1643    .UnbindContext = dri_unbind_context,
1644
1645    .AllocateBuffer = dri2_allocate_buffer,
1646    .ReleaseBuffer  = dri2_release_buffer,
1647 };
1648
1649 /* This is the table of extensions that the loader will dlsym() for. */
1650 const __DRIextension *galliumdrm_driver_extensions[] = {
1651     &driCoreExtension.base,
1652     &driImageDriverExtension.base,
1653     &driDRI2Extension.base,
1654     &gallium_config_options.base,
1655     NULL
1656 };
1657
1658 /* vim: set sw=3 ts=8 sts=3 expandtab: */