src/gallium/state_trackers/dri/dri2.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright 2009, VMware, Inc.
   5  * All Rights Reserved.
   6  * Copyright (C) 2010 LunarG Inc.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  * OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Keith Whitwell <keithw@vmware.com> Jakob Bornecrantz
  28  *    <wallbraker@gmail.com> Chia-I Wu <olv@lunarg.com>
  29  */
  30
  31 #include <xf86drm.h>
  32 #include <dlfcn.h>
  33 #include "util/u_memory.h"
  34 #include "util/u_inlines.h"
  35 #include "util/u_format.h"
  36 #include "util/u_debug.h"
  37 #include "state_tracker/drm_driver.h"
  38 #include "state_tracker/st_texture.h"
  39 #include "state_tracker/st_context.h"
  40 #include "pipe-loader/pipe_loader.h"
  41 #include "main/texobj.h"
  42
  43 #include "dri_screen.h"
  44 #include "dri_context.h"
  45 #include "dri_drawable.h"
  46 #include "dri_query_renderer.h"
  47 #include "dri2_buffer.h"
  48
  49 static int convert_fourcc(int format, int *dri_components_p)
  50 {
  51    int dri_components;
  52    switch(format) {
  53    case __DRI_IMAGE_FOURCC_RGB565:
  54       format = __DRI_IMAGE_FORMAT_RGB565;
  55       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  56       break;
  57    case __DRI_IMAGE_FOURCC_ARGB8888:
  58       format = __DRI_IMAGE_FORMAT_ARGB8888;
  59       dri_components = __DRI_IMAGE_COMPONENTS_RGBA;
  60       break;
  61    case __DRI_IMAGE_FOURCC_XRGB8888:
  62       format = __DRI_IMAGE_FORMAT_XRGB8888;
  63       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  64       break;
  65    case __DRI_IMAGE_FOURCC_ABGR8888:
  66       format = __DRI_IMAGE_FORMAT_ABGR8888;
  67       dri_components = __DRI_IMAGE_COMPONENTS_RGBA;
  68       break;
  69    case __DRI_IMAGE_FOURCC_XBGR8888:
  70       format = __DRI_IMAGE_FORMAT_XBGR8888;
  71       dri_components = __DRI_IMAGE_COMPONENTS_RGB;
  72       break;
  73    default:
  74       return -1;
  75    }
  76    *dri_components_p = dri_components;
  77    return format;
  78 }
  79
  80 static int convert_to_fourcc(int format)
  81 {
  82    switch(format) {
  83    case __DRI_IMAGE_FORMAT_RGB565:
  84       format = __DRI_IMAGE_FOURCC_RGB565;
  85       break;
  86    case __DRI_IMAGE_FORMAT_ARGB8888:
  87       format = __DRI_IMAGE_FOURCC_ARGB8888;
  88       break;
  89    case __DRI_IMAGE_FORMAT_XRGB8888:
  90       format = __DRI_IMAGE_FOURCC_XRGB8888;
  91       break;
  92    case __DRI_IMAGE_FORMAT_ABGR8888:
  93       format = __DRI_IMAGE_FOURCC_ABGR8888;
  94       break;
  95    case __DRI_IMAGE_FORMAT_XBGR8888:
  96       format = __DRI_IMAGE_FOURCC_XBGR8888;
  97       break;
  98    default:
  99       return -1;
 100    }
 101    return format;
 102 }
 103
 104 static enum pipe_format dri2_format_to_pipe_format (int format)
 105 {
 106    enum pipe_format pf;
 107
 108    switch (format) {
 109    case __DRI_IMAGE_FORMAT_RGB565:
 110       pf = PIPE_FORMAT_B5G6R5_UNORM;
 111       break;
 112    case __DRI_IMAGE_FORMAT_XRGB8888:
 113       pf = PIPE_FORMAT_BGRX8888_UNORM;
 114       break;
 115    case __DRI_IMAGE_FORMAT_ARGB8888:
 116       pf = PIPE_FORMAT_BGRA8888_UNORM;
 117       break;
 118    case __DRI_IMAGE_FORMAT_ABGR8888:
 119       pf = PIPE_FORMAT_RGBA8888_UNORM;
 120       break;
 121    default:
 122       pf = PIPE_FORMAT_NONE;
 123       break;
 124    }
 125
 126    return pf;
 127 }
 128
 129 /**
 130  * DRI2 flush extension.
 131  */
 132 static void
 133 dri2_flush_drawable(__DRIdrawable *dPriv)
 134 {
 135    dri_flush(dPriv->driContextPriv, dPriv, __DRI2_FLUSH_DRAWABLE, -1);
 136 }
 137
 138 static void
 139 dri2_invalidate_drawable(__DRIdrawable *dPriv)
 140 {
 141    struct dri_drawable *drawable = dri_drawable(dPriv);
 142
 143    dri2InvalidateDrawable(dPriv);
 144    drawable->dPriv->lastStamp = drawable->dPriv->dri2.stamp;
 145
 146    p_atomic_inc(&drawable->base.stamp);
 147 }
 148
 149 static const __DRI2flushExtension dri2FlushExtension = {
 150     .base = { __DRI2_FLUSH, 4 },
 151
 152     .flush                = dri2_flush_drawable,
 153     .invalidate           = dri2_invalidate_drawable,
 154     .flush_with_flags     = dri_flush,
 155 };
 156
 157 /**
 158  * Retrieve __DRIbuffer from the DRI loader.
 159  */
 160 static __DRIbuffer *
 161 dri2_drawable_get_buffers(struct dri_drawable *drawable,
 162                           const enum st_attachment_type *atts,
 163                           unsigned *count)
 164 {
 165    __DRIdrawable *dri_drawable = drawable->dPriv;
 166    const __DRIdri2LoaderExtension *loader = drawable->sPriv->dri2.loader;
 167    boolean with_format;
 168    __DRIbuffer *buffers;
 169    int num_buffers;
 170    unsigned attachments[10];
 171    unsigned num_attachments, i;
 172
 173    assert(loader);
 174    with_format = dri_with_format(drawable->sPriv);
 175
 176    num_attachments = 0;
 177
 178    /* for Xserver 1.6.0 (DRI2 version 1) we always need to ask for the front */
 179    if (!with_format)
 180       attachments[num_attachments++] = __DRI_BUFFER_FRONT_LEFT;
 181
 182    for (i = 0; i < *count; i++) {
 183       enum pipe_format format;
 184       unsigned bind;
 185       int att, depth;
 186
 187       dri_drawable_get_format(drawable, atts[i], &format, &bind);
 188       if (format == PIPE_FORMAT_NONE)
 189          continue;
 190
 191       switch (atts[i]) {
 192       case ST_ATTACHMENT_FRONT_LEFT:
 193          /* already added */
 194          if (!with_format)
 195             continue;
 196          att = __DRI_BUFFER_FRONT_LEFT;
 197          break;
 198       case ST_ATTACHMENT_BACK_LEFT:
 199          att = __DRI_BUFFER_BACK_LEFT;
 200          break;
 201       case ST_ATTACHMENT_FRONT_RIGHT:
 202          att = __DRI_BUFFER_FRONT_RIGHT;
 203          break;
 204       case ST_ATTACHMENT_BACK_RIGHT:
 205          att = __DRI_BUFFER_BACK_RIGHT;
 206          break;
 207       default:
 208          continue;
 209       }
 210
 211       /*
 212        * In this switch statement we must support all formats that
 213        * may occur as the stvis->color_format.
 214        */
 215       switch(format) {
 216       case PIPE_FORMAT_BGRA8888_UNORM:
 217          depth = 32;
 218          break;
 219       case PIPE_FORMAT_BGRX8888_UNORM:
 220          depth = 24;
 221          break;
 222       case PIPE_FORMAT_B5G6R5_UNORM:
 223          depth = 16;
 224          break;
 225       default:
 226          depth = util_format_get_blocksizebits(format);
 227          assert(!"Unexpected format in dri2_drawable_get_buffers()");
 228       }
 229
 230       attachments[num_attachments++] = att;
 231       if (with_format) {
 232          attachments[num_attachments++] = depth;
 233       }
 234    }
 235
 236    if (with_format) {
 237       num_attachments /= 2;
 238       buffers = loader->getBuffersWithFormat(dri_drawable,
 239             &dri_drawable->w, &dri_drawable->h,
 240             attachments, num_attachments,
 241             &num_buffers, dri_drawable->loaderPrivate);
 242    }
 243    else {
 244       buffers = loader->getBuffers(dri_drawable,
 245             &dri_drawable->w, &dri_drawable->h,
 246             attachments, num_attachments,
 247             &num_buffers, dri_drawable->loaderPrivate);
 248    }
 249
 250    if (buffers)
 251       *count = num_buffers;
 252
 253    return buffers;
 254 }
 255
 256 static bool
 257 dri_image_drawable_get_buffers(struct dri_drawable *drawable,
 258                                struct __DRIimageList *images,
 259                                const enum st_attachment_type *statts,
 260                                unsigned statts_count)
 261 {
 262    __DRIdrawable *dPriv = drawable->dPriv;
 263    __DRIscreen *sPriv = drawable->sPriv;
 264    unsigned int image_format = __DRI_IMAGE_FORMAT_NONE;
 265    enum pipe_format pf;
 266    uint32_t buffer_mask = 0;
 267    unsigned i, bind;
 268
 269    for (i = 0; i < statts_count; i++) {
 270       dri_drawable_get_format(drawable, statts[i], &pf, &bind);
 271       if (pf == PIPE_FORMAT_NONE)
 272          continue;
 273
 274       switch (statts[i]) {
 275       case ST_ATTACHMENT_FRONT_LEFT:
 276          buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
 277          break;
 278       case ST_ATTACHMENT_BACK_LEFT:
 279          buffer_mask |= __DRI_IMAGE_BUFFER_BACK;
 280          break;
 281       default:
 282          continue;
 283       }
 284
 285       switch (pf) {
 286       case PIPE_FORMAT_B5G6R5_UNORM:
 287          image_format = __DRI_IMAGE_FORMAT_RGB565;
 288          break;
 289       case PIPE_FORMAT_BGRX8888_UNORM:
 290          image_format = __DRI_IMAGE_FORMAT_XRGB8888;
 291          break;
 292       case PIPE_FORMAT_BGRA8888_UNORM:
 293          image_format = __DRI_IMAGE_FORMAT_ARGB8888;
 294          break;
 295       case PIPE_FORMAT_RGBA8888_UNORM:
 296          image_format = __DRI_IMAGE_FORMAT_ABGR8888;
 297          break;
 298       default:
 299          image_format = __DRI_IMAGE_FORMAT_NONE;
 300          break;
 301       }
 302    }
 303
 304    return (*sPriv->image.loader->getBuffers) (dPriv, image_format,
 305                                        (uint32_t *) &drawable->base.stamp,
 306                                        dPriv->loaderPrivate, buffer_mask,
 307                                        images);
 308 }
 309
 310 static __DRIbuffer *
 311 dri2_allocate_buffer(__DRIscreen *sPriv,
 312                      unsigned attachment, unsigned format,
 313                      int width, int height)
 314 {
 315    struct dri_screen *screen = dri_screen(sPriv);
 316    struct dri2_buffer *buffer;
 317    struct pipe_resource templ;
 318    enum pipe_format pf;
 319    unsigned bind = 0;
 320    struct winsys_handle whandle;
 321
 322    switch (attachment) {
 323       case __DRI_BUFFER_FRONT_LEFT:
 324       case __DRI_BUFFER_FAKE_FRONT_LEFT:
 325          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 326          break;
 327       case __DRI_BUFFER_BACK_LEFT:
 328          bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 329          break;
 330       case __DRI_BUFFER_DEPTH:
 331       case __DRI_BUFFER_DEPTH_STENCIL:
 332       case __DRI_BUFFER_STENCIL:
 333             bind = PIPE_BIND_DEPTH_STENCIL; /* XXX sampler? */
 334          break;
 335    }
 336
 337    /* because we get the handle and stride */
 338    bind |= PIPE_BIND_SHARED;
 339
 340    switch (format) {
 341       case 32:
 342          pf = PIPE_FORMAT_BGRA8888_UNORM;
 343          break;
 344       case 24:
 345          pf = PIPE_FORMAT_BGRX8888_UNORM;
 346          break;
 347       case 16:
 348          pf = PIPE_FORMAT_Z16_UNORM;
 349          break;
 350       default:
 351          return NULL;
 352    }
 353
 354    buffer = CALLOC_STRUCT(dri2_buffer);
 355    if (!buffer)
 356       return NULL;
 357
 358    memset(&templ, 0, sizeof(templ));
 359    templ.bind = bind;
 360    templ.format = pf;
 361    templ.target = PIPE_TEXTURE_2D;
 362    templ.last_level = 0;
 363    templ.width0 = width;
 364    templ.height0 = height;
 365    templ.depth0 = 1;
 366    templ.array_size = 1;
 367
 368    buffer->resource =
 369       screen->base.screen->resource_create(screen->base.screen, &templ);
 370    if (!buffer->resource) {
 371       FREE(buffer);
 372       return NULL;
 373    }
 374
 375    memset(&whandle, 0, sizeof(whandle));
 376    if (screen->can_share_buffer)
 377       whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 378    else
 379       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 380
 381    screen->base.screen->resource_get_handle(screen->base.screen,
 382          buffer->resource, &whandle,
 383          PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ);
 384
 385    buffer->base.attachment = attachment;
 386    buffer->base.name = whandle.handle;
 387    buffer->base.cpp = util_format_get_blocksize(pf);
 388    buffer->base.pitch = whandle.stride;
 389
 390    return &buffer->base;
 391 }
 392
 393 static void
 394 dri2_release_buffer(__DRIscreen *sPriv, __DRIbuffer *bPriv)
 395 {
 396    struct dri2_buffer *buffer = dri2_buffer(bPriv);
 397
 398    pipe_resource_reference(&buffer->resource, NULL);
 399    FREE(buffer);
 400 }
 401
 402 /*
 403  * Backend functions for st_framebuffer interface.
 404  */
 405
 406 static void
 407 dri2_allocate_textures(struct dri_context *ctx,
 408                        struct dri_drawable *drawable,
 409                        const enum st_attachment_type *statts,
 410                        unsigned statts_count)
 411 {
 412    __DRIscreen *sPriv = drawable->sPriv;
 413    __DRIdrawable *dri_drawable = drawable->dPriv;
 414    struct dri_screen *screen = dri_screen(sPriv);
 415    struct pipe_resource templ;
 416    boolean alloc_depthstencil = FALSE;
 417    unsigned i, j, bind;
 418    const __DRIimageLoaderExtension *image = sPriv->image.loader;
 419    /* Image specific variables */
 420    struct __DRIimageList images;
 421    /* Dri2 specific variables */
 422    __DRIbuffer *buffers = NULL;
 423    struct winsys_handle whandle;
 424    unsigned num_buffers = statts_count;
 425
 426    /* First get the buffers from the loader */
 427    if (image) {
 428       if (!dri_image_drawable_get_buffers(drawable, &images,
 429                                           statts, statts_count))
 430          return;
 431    }
 432    else {
 433       buffers = dri2_drawable_get_buffers(drawable, statts, &num_buffers);
 434       if (!buffers || (drawable->old_num == num_buffers &&
 435                        drawable->old_w == dri_drawable->w &&
 436                        drawable->old_h == dri_drawable->h &&
 437                        memcmp(drawable->old, buffers,
 438                               sizeof(__DRIbuffer) * num_buffers) == 0))
 439          return;
 440    }
 441
 442    /* Second clean useless resources*/
 443
 444    /* See if we need a depth-stencil buffer. */
 445    for (i = 0; i < statts_count; i++) {
 446       if (statts[i] == ST_ATTACHMENT_DEPTH_STENCIL) {
 447          alloc_depthstencil = TRUE;
 448          break;
 449       }
 450    }
 451
 452    /* Delete the resources we won't need. */
 453    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 454       /* Don't delete the depth-stencil buffer, we can reuse it. */
 455       if (i == ST_ATTACHMENT_DEPTH_STENCIL && alloc_depthstencil)
 456          continue;
 457
 458       /* Flush the texture before unreferencing, so that other clients can
 459        * see what the driver has rendered.
 460        */
 461       if (i != ST_ATTACHMENT_DEPTH_STENCIL && drawable->textures[i]) {
 462          struct pipe_context *pipe = ctx->st->pipe;
 463          pipe->flush_resource(pipe, drawable->textures[i]);
 464       }
 465
 466       pipe_resource_reference(&drawable->textures[i], NULL);
 467    }
 468
 469    if (drawable->stvis.samples > 1) {
 470       for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 471          boolean del = TRUE;
 472
 473          /* Don't delete MSAA resources for the attachments which are enabled,
 474           * we can reuse them. */
 475          for (j = 0; j < statts_count; j++) {
 476             if (i == statts[j]) {
 477                del = FALSE;
 478                break;
 479             }
 480          }
 481
 482          if (del) {
 483             pipe_resource_reference(&drawable->msaa_textures[i], NULL);
 484          }
 485       }
 486    }
 487
 488    /* Third use the buffers retrieved to fill the drawable info */
 489
 490    memset(&templ, 0, sizeof(templ));
 491    templ.target = screen->target;
 492    templ.last_level = 0;
 493    templ.depth0 = 1;
 494    templ.array_size = 1;
 495
 496    if (image) {
 497       if (images.image_mask & __DRI_IMAGE_BUFFER_FRONT) {
 498          struct pipe_resource **buf =
 499             &drawable->textures[ST_ATTACHMENT_FRONT_LEFT];
 500          struct pipe_resource *texture = images.front->texture;
 501
 502          dri_drawable->w = texture->width0;
 503          dri_drawable->h = texture->height0;
 504
 505          pipe_resource_reference(buf, texture);
 506       }
 507
 508       if (images.image_mask & __DRI_IMAGE_BUFFER_BACK) {
 509          struct pipe_resource **buf =
 510             &drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 511          struct pipe_resource *texture = images.back->texture;
 512
 513          dri_drawable->w = texture->width0;
 514          dri_drawable->h = texture->height0;
 515
 516          pipe_resource_reference(buf, texture);
 517       }
 518
 519       /* Note: if there is both a back and a front buffer,
 520        * then they have the same size.
 521        */
 522       templ.width0 = dri_drawable->w;
 523       templ.height0 = dri_drawable->h;
 524    }
 525    else {
 526       memset(&whandle, 0, sizeof(whandle));
 527
 528       /* Process DRI-provided buffers and get pipe_resources. */
 529       for (i = 0; i < num_buffers; i++) {
 530          __DRIbuffer *buf = &buffers[i];
 531          enum st_attachment_type statt;
 532          enum pipe_format format;
 533
 534          switch (buf->attachment) {
 535          case __DRI_BUFFER_FRONT_LEFT:
 536             if (!screen->auto_fake_front) {
 537                continue; /* invalid attachment */
 538             }
 539             /* fallthrough */
 540          case __DRI_BUFFER_FAKE_FRONT_LEFT:
 541             statt = ST_ATTACHMENT_FRONT_LEFT;
 542             break;
 543          case __DRI_BUFFER_BACK_LEFT:
 544             statt = ST_ATTACHMENT_BACK_LEFT;
 545             break;
 546          default:
 547             continue; /* invalid attachment */
 548          }
 549
 550          dri_drawable_get_format(drawable, statt, &format, &bind);
 551          if (format == PIPE_FORMAT_NONE)
 552             continue;
 553
 554          /* dri2_drawable_get_buffers has already filled dri_drawable->w
 555           * and dri_drawable->h */
 556          templ.width0 = dri_drawable->w;
 557          templ.height0 = dri_drawable->h;
 558          templ.format = format;
 559          templ.bind = bind;
 560          whandle.handle = buf->name;
 561          whandle.stride = buf->pitch;
 562          whandle.offset = 0;
 563          if (screen->can_share_buffer)
 564             whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 565          else
 566             whandle.type = DRM_API_HANDLE_TYPE_KMS;
 567          drawable->textures[statt] =
 568             screen->base.screen->resource_from_handle(screen->base.screen,
 569                   &templ, &whandle,
 570                   PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ);
 571          assert(drawable->textures[statt]);
 572       }
 573    }
 574
 575    /* Allocate private MSAA colorbuffers. */
 576    if (drawable->stvis.samples > 1) {
 577       for (i = 0; i < statts_count; i++) {
 578          enum st_attachment_type statt = statts[i];
 579
 580          if (statt == ST_ATTACHMENT_DEPTH_STENCIL)
 581             continue;
 582
 583          if (drawable->textures[statt]) {
 584             templ.format = drawable->textures[statt]->format;
 585             templ.bind = drawable->textures[statt]->bind & ~PIPE_BIND_SCANOUT;
 586             templ.nr_samples = drawable->stvis.samples;
 587
 588             /* Try to reuse the resource.
 589              * (the other resource parameters should be constant)
 590              */
 591             if (!drawable->msaa_textures[statt] ||
 592                 drawable->msaa_textures[statt]->width0 != templ.width0 ||
 593                 drawable->msaa_textures[statt]->height0 != templ.height0) {
 594                /* Allocate a new one. */
 595                pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 596
 597                drawable->msaa_textures[statt] =
 598                   screen->base.screen->resource_create(screen->base.screen,
 599                                                        &templ);
 600                assert(drawable->msaa_textures[statt]);
 601
 602                /* If there are any MSAA resources, we should initialize them
 603                 * such that they contain the same data as the single-sample
 604                 * resources we just got from the X server.
 605                 *
 606                 * The reason for this is that the state tracker (and
 607                 * therefore the app) can access the MSAA resources only.
 608                 * The single-sample resources are not exposed
 609                 * to the state tracker.
 610                 *
 611                 */
 612                dri_pipe_blit(ctx->st->pipe,
 613                              drawable->msaa_textures[statt],
 614                              drawable->textures[statt]);
 615             }
 616          }
 617          else {
 618             pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 619          }
 620       }
 621    }
 622
 623    /* Allocate a private depth-stencil buffer. */
 624    if (alloc_depthstencil) {
 625       enum st_attachment_type statt = ST_ATTACHMENT_DEPTH_STENCIL;
 626       struct pipe_resource **zsbuf;
 627       enum pipe_format format;
 628       unsigned bind;
 629
 630       dri_drawable_get_format(drawable, statt, &format, &bind);
 631
 632       if (format) {
 633          templ.format = format;
 634          templ.bind = bind;
 635
 636          if (drawable->stvis.samples > 1) {
 637             templ.nr_samples = drawable->stvis.samples;
 638             zsbuf = &drawable->msaa_textures[statt];
 639          }
 640          else {
 641             templ.nr_samples = 0;
 642             zsbuf = &drawable->textures[statt];
 643          }
 644
 645          /* Try to reuse the resource.
 646           * (the other resource parameters should be constant)
 647           */
 648          if (!*zsbuf ||
 649              (*zsbuf)->width0 != templ.width0 ||
 650              (*zsbuf)->height0 != templ.height0) {
 651             /* Allocate a new one. */
 652             pipe_resource_reference(zsbuf, NULL);
 653             *zsbuf = screen->base.screen->resource_create(screen->base.screen,
 654                                                           &templ);
 655             assert(*zsbuf);
 656          }
 657       }
 658       else {
 659          pipe_resource_reference(&drawable->msaa_textures[statt], NULL);
 660          pipe_resource_reference(&drawable->textures[statt], NULL);
 661       }
 662    }
 663
 664    /* For DRI2, we may get the same buffers again from the server.
 665     * To prevent useless imports of gem names, drawable->old* is used
 666     * to bypass the import if we get the same buffers. This doesn't apply
 667     * to DRI3/Wayland, users of image.loader, since the buffer is managed
 668     * by the client (no import), and the back buffer is going to change
 669     * at every redraw.
 670     */
 671    if (!image) {
 672       drawable->old_num = num_buffers;
 673       drawable->old_w = dri_drawable->w;
 674       drawable->old_h = dri_drawable->h;
 675       memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * num_buffers);
 676    }
 677 }
 678
 679 static void
 680 dri2_flush_frontbuffer(struct dri_context *ctx,
 681                        struct dri_drawable *drawable,
 682                        enum st_attachment_type statt)
 683 {
 684    __DRIdrawable *dri_drawable = drawable->dPriv;
 685    const __DRIimageLoaderExtension *image = drawable->sPriv->image.loader;
 686    const __DRIdri2LoaderExtension *loader = drawable->sPriv->dri2.loader;
 687    struct pipe_context *pipe = ctx->st->pipe;
 688
 689    if (statt != ST_ATTACHMENT_FRONT_LEFT)
 690       return;
 691
 692    if (drawable->stvis.samples > 1) {
 693       /* Resolve the front buffer. */
 694       dri_pipe_blit(ctx->st->pipe,
 695                     drawable->textures[ST_ATTACHMENT_FRONT_LEFT],
 696                     drawable->msaa_textures[ST_ATTACHMENT_FRONT_LEFT]);
 697    }
 698
 699    if (drawable->textures[ST_ATTACHMENT_FRONT_LEFT]) {
 700       pipe->flush_resource(pipe, drawable->textures[ST_ATTACHMENT_FRONT_LEFT]);
 701    }
 702
 703    pipe->flush(pipe, NULL, 0);
 704
 705    if (image) {
 706       image->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 707    }
 708    else if (loader->flushFrontBuffer) {
 709       loader->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);
 710    }
 711 }
 712
 713 static void
 714 dri2_update_tex_buffer(struct dri_drawable *drawable,
 715                        struct dri_context *ctx,
 716                        struct pipe_resource *res)
 717 {
 718    /* no-op */
 719 }
 720
 721 static __DRIimage *
 722 dri2_lookup_egl_image(struct dri_screen *screen, void *handle)
 723 {
 724    const __DRIimageLookupExtension *loader = screen->sPriv->dri2.image;
 725    __DRIimage *img;
 726
 727    if (!loader->lookupEGLImage)
 728       return NULL;
 729
 730    img = loader->lookupEGLImage(screen->sPriv,
 731                                 handle, screen->sPriv->loaderPrivate);
 732
 733    return img;
 734 }
 735
 736 static __DRIimage *
 737 dri2_create_image_from_winsys(__DRIscreen *_screen,
 738                               int width, int height, int format,
 739                               struct winsys_handle *whandle, int pitch,
 740                               void *loaderPrivate)
 741 {
 742    struct dri_screen *screen = dri_screen(_screen);
 743    __DRIimage *img;
 744    struct pipe_resource templ;
 745    unsigned tex_usage;
 746    enum pipe_format pf;
 747
 748    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 749
 750    pf = dri2_format_to_pipe_format (format);
 751    if (pf == PIPE_FORMAT_NONE)
 752       return NULL;
 753
 754    img = CALLOC_STRUCT(__DRIimageRec);
 755    if (!img)
 756       return NULL;
 757
 758    memset(&templ, 0, sizeof(templ));
 759    templ.bind = tex_usage;
 760    templ.format = pf;
 761    templ.target = screen->target;
 762    templ.last_level = 0;
 763    templ.width0 = width;
 764    templ.height0 = height;
 765    templ.depth0 = 1;
 766    templ.array_size = 1;
 767
 768    whandle->stride = pitch * util_format_get_blocksize(pf);
 769    whandle->offset = 0;
 770
 771    img->texture = screen->base.screen->resource_from_handle(screen->base.screen,
 772          &templ, whandle, PIPE_HANDLE_USAGE_READ_WRITE);
 773    if (!img->texture) {
 774       FREE(img);
 775       return NULL;
 776    }
 777
 778    img->level = 0;
 779    img->layer = 0;
 780    img->dri_format = format;
 781    img->use = 0;
 782    img->loader_private = loaderPrivate;
 783
 784    return img;
 785 }
 786
 787 static __DRIimage *
 788 dri2_create_image_from_name(__DRIscreen *_screen,
 789                             int width, int height, int format,
 790                             int name, int pitch, void *loaderPrivate)
 791 {
 792    struct winsys_handle whandle;
 793
 794    memset(&whandle, 0, sizeof(whandle));
 795    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 796    whandle.handle = name;
 797
 798    return dri2_create_image_from_winsys(_screen, width, height, format,
 799                                         &whandle, pitch, loaderPrivate);
 800 }
 801
 802 static __DRIimage *
 803 dri2_create_image_from_fd(__DRIscreen *_screen,
 804                           int width, int height, int format,
 805                           int fd, int pitch, void *loaderPrivate)
 806 {
 807    struct winsys_handle whandle;
 808
 809    if (fd < 0)
 810       return NULL;
 811
 812    memset(&whandle, 0, sizeof(whandle));
 813    whandle.type = DRM_API_HANDLE_TYPE_FD;
 814    whandle.handle = (unsigned)fd;
 815
 816    return dri2_create_image_from_winsys(_screen, width, height, format,
 817                                         &whandle, pitch, loaderPrivate);
 818 }
 819
 820 static __DRIimage *
 821 dri2_create_image_from_renderbuffer(__DRIcontext *context,
 822                                     int renderbuffer, void *loaderPrivate)
 823 {
 824    struct dri_context *ctx = dri_context(context);
 825
 826    if (!ctx->st->get_resource_for_egl_image)
 827       return NULL;
 828
 829    /* TODO */
 830    return NULL;
 831 }
 832
 833 static __DRIimage *
 834 dri2_create_image(__DRIscreen *_screen,
 835                    int width, int height, int format,
 836                    unsigned int use, void *loaderPrivate)
 837 {
 838    struct dri_screen *screen = dri_screen(_screen);
 839    __DRIimage *img;
 840    struct pipe_resource templ;
 841    unsigned tex_usage;
 842    enum pipe_format pf;
 843
 844    tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 845    if (use & __DRI_IMAGE_USE_SCANOUT)
 846       tex_usage |= PIPE_BIND_SCANOUT;
 847    if (use & __DRI_IMAGE_USE_SHARE)
 848       tex_usage |= PIPE_BIND_SHARED;
 849    if (use & __DRI_IMAGE_USE_LINEAR)
 850       tex_usage |= PIPE_BIND_LINEAR;
 851    if (use & __DRI_IMAGE_USE_CURSOR) {
 852       if (width != 64 || height != 64)
 853          return NULL;
 854       tex_usage |= PIPE_BIND_CURSOR;
 855    }
 856
 857    pf = dri2_format_to_pipe_format (format);
 858    if (pf == PIPE_FORMAT_NONE)
 859       return NULL;
 860
 861    img = CALLOC_STRUCT(__DRIimageRec);
 862    if (!img)
 863       return NULL;
 864
 865    memset(&templ, 0, sizeof(templ));
 866    templ.bind = tex_usage;
 867    templ.format = pf;
 868    templ.target = PIPE_TEXTURE_2D;
 869    templ.last_level = 0;
 870    templ.width0 = width;
 871    templ.height0 = height;
 872    templ.depth0 = 1;
 873    templ.array_size = 1;
 874
 875    img->texture = screen->base.screen->resource_create(screen->base.screen, &templ);
 876    if (!img->texture) {
 877       FREE(img);
 878       return NULL;
 879    }
 880
 881    img->level = 0;
 882    img->layer = 0;
 883    img->dri_format = format;
 884    img->dri_components = 0;
 885    img->use = use;
 886
 887    img->loader_private = loaderPrivate;
 888    return img;
 889 }
 890
 891 static GLboolean
 892 dri2_query_image(__DRIimage *image, int attrib, int *value)
 893 {
 894    struct winsys_handle whandle;
 895    unsigned usage;
 896
 897    if (image->use & __DRI_IMAGE_USE_BACKBUFFER)
 898       usage = PIPE_HANDLE_USAGE_EXPLICIT_FLUSH | PIPE_HANDLE_USAGE_READ;
 899    else
 900       usage = PIPE_HANDLE_USAGE_READ_WRITE;
 901
 902    memset(&whandle, 0, sizeof(whandle));
 903
 904    switch (attrib) {
 905    case __DRI_IMAGE_ATTRIB_STRIDE:
 906       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 907       image->texture->screen->resource_get_handle(image->texture->screen,
 908             image->texture, &whandle, usage);
 909       *value = whandle.stride;
 910       return GL_TRUE;
 911    case __DRI_IMAGE_ATTRIB_HANDLE:
 912       whandle.type = DRM_API_HANDLE_TYPE_KMS;
 913       image->texture->screen->resource_get_handle(image->texture->screen,
 914          image->texture, &whandle, usage);
 915       *value = whandle.handle;
 916       return GL_TRUE;
 917    case __DRI_IMAGE_ATTRIB_NAME:
 918       whandle.type = DRM_API_HANDLE_TYPE_SHARED;
 919       image->texture->screen->resource_get_handle(image->texture->screen,
 920          image->texture, &whandle, usage);
 921       *value = whandle.handle;
 922       return GL_TRUE;
 923    case __DRI_IMAGE_ATTRIB_FD:
 924       whandle.type= DRM_API_HANDLE_TYPE_FD;
 925       image->texture->screen->resource_get_handle(image->texture->screen,
 926          image->texture, &whandle, usage);
 927       *value = whandle.handle;
 928       return GL_TRUE;
 929    case __DRI_IMAGE_ATTRIB_FORMAT:
 930       *value = image->dri_format;
 931       return GL_TRUE;
 932    case __DRI_IMAGE_ATTRIB_WIDTH:
 933       *value = image->texture->width0;
 934       return GL_TRUE;
 935    case __DRI_IMAGE_ATTRIB_HEIGHT:
 936       *value = image->texture->height0;
 937       return GL_TRUE;
 938    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 939       if (image->dri_components == 0)
 940          return GL_FALSE;
 941       *value = image->dri_components;
 942       return GL_TRUE;
 943    case __DRI_IMAGE_ATTRIB_FOURCC:
 944       *value = convert_to_fourcc(image->dri_format);
 945       return GL_TRUE;
 946    case __DRI_IMAGE_ATTRIB_NUM_PLANES:
 947       *value = 1;
 948       return GL_TRUE;
 949    default:
 950       return GL_FALSE;
 951    }
 952 }
 953
 954 static __DRIimage *
 955 dri2_dup_image(__DRIimage *image, void *loaderPrivate)
 956 {
 957    __DRIimage *img;
 958
 959    img = CALLOC_STRUCT(__DRIimageRec);
 960    if (!img)
 961       return NULL;
 962
 963    img->texture = NULL;
 964    pipe_resource_reference(&img->texture, image->texture);
 965    img->level = image->level;
 966    img->layer = image->layer;
 967    img->dri_format = image->dri_format;
 968    /* This should be 0 for sub images, but dup is also used for base images. */
 969    img->dri_components = image->dri_components;
 970    img->loader_private = loaderPrivate;
 971
 972    return img;
 973 }
 974
 975 static GLboolean
 976 dri2_validate_usage(__DRIimage *image, unsigned int use)
 977 {
 978    /*
 979     * Gallium drivers are bad at adding usages to the resources
 980     * once opened again in another process, which is the main use
 981     * case for this, so we have to lie.
 982     */
 983    if (image != NULL)
 984       return GL_TRUE;
 985    else
 986       return GL_FALSE;
 987 }
 988
 989 static __DRIimage *
 990 dri2_from_names(__DRIscreen *screen, int width, int height, int format,
 991                 int *names, int num_names, int *strides, int *offsets,
 992                 void *loaderPrivate)
 993 {
 994    __DRIimage *img;
 995    int stride, dri_components;
 996
 997    if (num_names != 1)
 998       return NULL;
 999    if (offsets[0] != 0)
1000       return NULL;
1001
1002    format = convert_fourcc(format, &dri_components);
1003    if (format == -1)
1004       return NULL;
1005
1006    /* Strides are in bytes not pixels. */
1007    stride = strides[0] /4;
1008
1009    img = dri2_create_image_from_name(screen, width, height, format,
1010                                      names[0], stride, loaderPrivate);
1011    if (img == NULL)
1012       return NULL;
1013
1014    img->dri_components = dri_components;
1015    return img;
1016 }
1017
1018 static __DRIimage *
1019 dri2_from_planar(__DRIimage *image, int plane, void *loaderPrivate)
1020 {
1021    __DRIimage *img;
1022
1023    if (plane != 0)
1024       return NULL;
1025
1026    if (image->dri_components == 0)
1027       return NULL;
1028
1029    img = dri2_dup_image(image, loaderPrivate);
1030    if (img == NULL)
1031       return NULL;
1032
1033    /* set this to 0 for sub images. */
1034    img->dri_components = 0;
1035    return img;
1036 }
1037
1038 static __DRIimage *
1039 dri2_create_from_texture(__DRIcontext *context, int target, unsigned texture,
1040                          int depth, int level, unsigned *error,
1041                          void *loaderPrivate)
1042 {
1043    __DRIimage *img;
1044    struct gl_context *ctx = ((struct st_context *)dri_context(context)->st)->ctx;
1045    struct gl_texture_object *obj;
1046    struct pipe_resource *tex;
1047    GLuint face = 0;
1048
1049    obj = _mesa_lookup_texture(ctx, texture);
1050    if (!obj || obj->Target != target) {
1051       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1052       return NULL;
1053    }
1054
1055    tex = st_get_texobj_resource(obj);
1056    if (!tex) {
1057       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1058       return NULL;
1059    }
1060
1061    if (target == GL_TEXTURE_CUBE_MAP)
1062       face = depth;
1063
1064    _mesa_test_texobj_completeness(ctx, obj);
1065    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
1066       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1067       return NULL;
1068    }
1069
1070    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
1071       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1072       return NULL;
1073    }
1074
1075    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < depth) {
1076       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1077       return NULL;
1078    }
1079
1080    img = CALLOC_STRUCT(__DRIimageRec);
1081    if (!img) {
1082       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
1083       return NULL;
1084    }
1085
1086    img->level = level;
1087    img->layer = depth;
1088    img->dri_format = driGLFormatToImageFormat(obj->Image[face][level]->TexFormat);
1089
1090    img->loader_private = loaderPrivate;
1091
1092    if (img->dri_format == __DRI_IMAGE_FORMAT_NONE) {
1093       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
1094       free(img);
1095       return NULL;
1096    }
1097
1098    pipe_resource_reference(&img->texture, tex);
1099
1100    *error = __DRI_IMAGE_ERROR_SUCCESS;
1101    return img;
1102 }
1103
1104 static __DRIimage *
1105 dri2_from_fds(__DRIscreen *screen, int width, int height, int fourcc,
1106               int *fds, int num_fds, int *strides, int *offsets,
1107               void *loaderPrivate)
1108 {
1109    __DRIimage *img;
1110    int format, stride, dri_components;
1111
1112    if (num_fds != 1)
1113       return NULL;
1114    if (offsets[0] != 0)
1115       return NULL;
1116
1117    format = convert_fourcc(fourcc, &dri_components);
1118    if (format == -1)
1119       return NULL;
1120
1121    /* Strides are in bytes not pixels. */
1122    stride = strides[0] /4;
1123
1124    img = dri2_create_image_from_fd(screen, width, height, format,
1125                                    fds[0], stride, loaderPrivate);
1126    if (img == NULL)
1127       return NULL;
1128
1129    img->dri_components = dri_components;
1130    return img;
1131 }
1132
1133 static __DRIimage *
1134 dri2_from_dma_bufs(__DRIscreen *screen,
1135                    int width, int height, int fourcc,
1136                    int *fds, int num_fds,
1137                    int *strides, int *offsets,
1138                    enum __DRIYUVColorSpace yuv_color_space,
1139                    enum __DRISampleRange sample_range,
1140                    enum __DRIChromaSiting horizontal_siting,
1141                    enum __DRIChromaSiting vertical_siting,
1142                    unsigned *error,
1143                    void *loaderPrivate)
1144 {
1145    __DRIimage *img;
1146    int format, stride, dri_components;
1147
1148    if (num_fds != 1 || offsets[0] != 0) {
1149       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1150       return NULL;
1151    }
1152
1153    format = convert_fourcc(fourcc, &dri_components);
1154    if (format == -1) {
1155       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
1156       return NULL;
1157    }
1158
1159    /* Strides are in bytes not pixels. */
1160    stride = strides[0] /4;
1161
1162    img = dri2_create_image_from_fd(screen, width, height, format,
1163                                    fds[0], stride, loaderPrivate);
1164    if (img == NULL) {
1165       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
1166       return NULL;
1167    }
1168
1169    img->yuv_color_space = yuv_color_space;
1170    img->sample_range = sample_range;
1171    img->horizontal_siting = horizontal_siting;
1172    img->vertical_siting = vertical_siting;
1173    img->dri_components = dri_components;
1174
1175    *error = __DRI_IMAGE_ERROR_SUCCESS;
1176    return img;
1177 }
1178
1179 static void
1180 dri2_blit_image(__DRIcontext *context, __DRIimage *dst, __DRIimage *src,
1181                 int dstx0, int dsty0, int dstwidth, int dstheight,
1182                 int srcx0, int srcy0, int srcwidth, int srcheight,
1183                 int flush_flag)
1184 {
1185    struct dri_context *ctx = dri_context(context);
1186    struct pipe_context *pipe = ctx->st->pipe;
1187    struct pipe_screen *screen;
1188    struct pipe_fence_handle *fence;
1189    struct pipe_blit_info blit;
1190
1191    if (!dst || !src)
1192       return;
1193
1194    memset(&blit, 0, sizeof(blit));
1195    blit.dst.resource = dst->texture;
1196    blit.dst.box.x = dstx0;
1197    blit.dst.box.y = dsty0;
1198    blit.dst.box.width = dstwidth;
1199    blit.dst.box.height = dstheight;
1200    blit.dst.box.depth = 1;
1201    blit.dst.format = dst->texture->format;
1202    blit.src.resource = src->texture;
1203    blit.src.box.x = srcx0;
1204    blit.src.box.y = srcy0;
1205    blit.src.box.width = srcwidth;
1206    blit.src.box.height = srcheight;
1207    blit.src.box.depth = 1;
1208    blit.src.format = src->texture->format;
1209    blit.mask = PIPE_MASK_RGBA;
1210    blit.filter = PIPE_TEX_FILTER_NEAREST;
1211
1212    pipe->blit(pipe, &blit);
1213
1214    if (flush_flag == __BLIT_FLAG_FLUSH) {
1215       pipe->flush_resource(pipe, dst->texture);
1216       ctx->st->flush(ctx->st, 0, NULL);
1217    } else if (flush_flag == __BLIT_FLAG_FINISH) {
1218       screen = dri_screen(ctx->sPriv)->base.screen;
1219       pipe->flush_resource(pipe, dst->texture);
1220       ctx->st->flush(ctx->st, 0, &fence);
1221       (void) screen->fence_finish(screen, fence, PIPE_TIMEOUT_INFINITE);
1222       screen->fence_reference(screen, &fence, NULL);
1223    }
1224 }
1225
1226 static void
1227 dri2_destroy_image(__DRIimage *img)
1228 {
1229    pipe_resource_reference(&img->texture, NULL);
1230    FREE(img);
1231 }
1232
1233 static int
1234 dri2_get_capabilities(__DRIscreen *_screen)
1235 {
1236    struct dri_screen *screen = dri_screen(_screen);
1237
1238    return (screen->can_share_buffer ? __DRI_IMAGE_CAP_GLOBAL_NAMES : 0);
1239 }
1240
1241 /* The extension is modified during runtime if DRI_PRIME is detected */
1242 static __DRIimageExtension dri2ImageExtension = {
1243     .base = { __DRI_IMAGE, 11 },
1244
1245     .createImageFromName          = dri2_create_image_from_name,
1246     .createImageFromRenderbuffer  = dri2_create_image_from_renderbuffer,
1247     .destroyImage                 = dri2_destroy_image,
1248     .createImage                  = dri2_create_image,
1249     .queryImage                   = dri2_query_image,
1250     .dupImage                     = dri2_dup_image,
1251     .validateUsage                = dri2_validate_usage,
1252     .createImageFromNames         = dri2_from_names,
1253     .fromPlanar                   = dri2_from_planar,
1254     .createImageFromTexture       = dri2_create_from_texture,
1255     .createImageFromFds           = NULL,
1256     .createImageFromDmaBufs       = NULL,
1257     .blitImage                    = dri2_blit_image,
1258     .getCapabilities              = dri2_get_capabilities,
1259 };
1260
1261
1262 static bool
1263 dri2_is_opencl_interop_loaded_locked(struct dri_screen *screen)
1264 {
1265    return screen->opencl_dri_event_add_ref &&
1266           screen->opencl_dri_event_release &&
1267           screen->opencl_dri_event_wait &&
1268           screen->opencl_dri_event_get_fence;
1269 }
1270
1271 static bool
1272 dri2_load_opencl_interop(struct dri_screen *screen)
1273 {
1274 #if defined(RTLD_DEFAULT)
1275    bool success;
1276
1277    pipe_mutex_lock(screen->opencl_func_mutex);
1278
1279    if (dri2_is_opencl_interop_loaded_locked(screen)) {
1280       pipe_mutex_unlock(screen->opencl_func_mutex);
1281       return true;
1282    }
1283
1284    screen->opencl_dri_event_add_ref =
1285       dlsym(RTLD_DEFAULT, "opencl_dri_event_add_ref");
1286    screen->opencl_dri_event_release =
1287       dlsym(RTLD_DEFAULT, "opencl_dri_event_release");
1288    screen->opencl_dri_event_wait =
1289       dlsym(RTLD_DEFAULT, "opencl_dri_event_wait");
1290    screen->opencl_dri_event_get_fence =
1291       dlsym(RTLD_DEFAULT, "opencl_dri_event_get_fence");
1292
1293    success = dri2_is_opencl_interop_loaded_locked(screen);
1294    pipe_mutex_unlock(screen->opencl_func_mutex);
1295    return success;
1296 #else
1297    return false;
1298 #endif
1299 }
1300
1301 struct dri2_fence {
1302    struct dri_screen *driscreen;
1303    struct pipe_fence_handle *pipe_fence;
1304    void *cl_event;
1305 };
1306
1307 static void *
1308 dri2_create_fence(__DRIcontext *_ctx)
1309 {
1310    struct pipe_context *ctx = dri_context(_ctx)->st->pipe;
1311    struct dri2_fence *fence = CALLOC_STRUCT(dri2_fence);
1312
1313    if (!fence)
1314       return NULL;
1315
1316    ctx->flush(ctx, &fence->pipe_fence, 0);
1317
1318    if (!fence->pipe_fence) {
1319       FREE(fence);
1320       return NULL;
1321    }
1322
1323    fence->driscreen = dri_screen(_ctx->driScreenPriv);
1324    return fence;
1325 }
1326
1327 static void *
1328 dri2_get_fence_from_cl_event(__DRIscreen *_screen, intptr_t cl_event)
1329 {
1330    struct dri_screen *driscreen = dri_screen(_screen);
1331    struct dri2_fence *fence;
1332
1333    if (!dri2_load_opencl_interop(driscreen))
1334       return NULL;
1335
1336    fence = CALLOC_STRUCT(dri2_fence);
1337    if (!fence)
1338       return NULL;
1339
1340    fence->cl_event = (void*)cl_event;
1341
1342    if (!driscreen->opencl_dri_event_add_ref(fence->cl_event)) {
1343       free(fence);
1344       return NULL;
1345    }
1346
1347    fence->driscreen = driscreen;
1348    return fence;
1349 }
1350
1351 static void
1352 dri2_destroy_fence(__DRIscreen *_screen, void *_fence)
1353 {
1354    struct dri_screen *driscreen = dri_screen(_screen);
1355    struct pipe_screen *screen = driscreen->base.screen;
1356    struct dri2_fence *fence = (struct dri2_fence*)_fence;
1357
1358    if (fence->pipe_fence)
1359       screen->fence_reference(screen, &fence->pipe_fence, NULL);
1360    else if (fence->cl_event)
1361       driscreen->opencl_dri_event_release(fence->cl_event);
1362    else
1363       assert(0);
1364
1365    FREE(fence);
1366 }
1367
1368 static GLboolean
1369 dri2_client_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags,
1370                       uint64_t timeout)
1371 {
1372    struct dri2_fence *fence = (struct dri2_fence*)_fence;
1373    struct dri_screen *driscreen = fence->driscreen;
1374    struct pipe_screen *screen = driscreen->base.screen;
1375
1376    /* No need to flush. The context was flushed when the fence was created. */
1377
1378    if (fence->pipe_fence)
1379       return screen->fence_finish(screen, fence->pipe_fence, timeout);
1380    else if (fence->cl_event) {
1381       struct pipe_fence_handle *pipe_fence =
1382          driscreen->opencl_dri_event_get_fence(fence->cl_event);
1383
1384       if (pipe_fence)
1385          return screen->fence_finish(screen, pipe_fence, timeout);
1386       else
1387          return driscreen->opencl_dri_event_wait(fence->cl_event, timeout);
1388    }
1389    else {
1390       assert(0);
1391       return false;
1392    }
1393 }
1394
1395 static void
1396 dri2_server_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags)
1397 {
1398    /* AFAIK, no driver currently supports parallel context execution. */
1399 }
1400
1401 static __DRI2fenceExtension dri2FenceExtension = {
1402    .base = { __DRI2_FENCE, 1 },
1403
1404    .create_fence = dri2_create_fence,
1405    .get_fence_from_cl_event = dri2_get_fence_from_cl_event,
1406    .destroy_fence = dri2_destroy_fence,
1407    .client_wait_sync = dri2_client_wait_sync,
1408    .server_wait_sync = dri2_server_wait_sync
1409 };
1410
1411 static const __DRIrobustnessExtension dri2Robustness = {
1412    .base = { __DRI2_ROBUSTNESS, 1 }
1413 };
1414
1415 /*
1416  * Backend function init_screen.
1417  */
1418
1419 static const __DRIextension *dri_screen_extensions[] = {
1420    &driTexBufferExtension.base,
1421    &dri2FlushExtension.base,
1422    &dri2ImageExtension.base,
1423    &dri2RendererQueryExtension.base,
1424    &dri2ConfigQueryExtension.base,
1425    &dri2ThrottleExtension.base,
1426    &dri2FenceExtension.base,
1427    NULL
1428 };
1429
1430 static const __DRIextension *dri_robust_screen_extensions[] = {
1431    &driTexBufferExtension.base,
1432    &dri2FlushExtension.base,
1433    &dri2ImageExtension.base,
1434    &dri2RendererQueryExtension.base,
1435    &dri2ConfigQueryExtension.base,
1436    &dri2ThrottleExtension.base,
1437    &dri2FenceExtension.base,
1438    &dri2Robustness.base,
1439    NULL
1440 };
1441
1442 /**
1443  * This is the driver specific part of the createNewScreen entry point.
1444  *
1445  * Returns the struct gl_config supported by this driver.
1446  */
1447 static const __DRIconfig **
1448 dri2_init_screen(__DRIscreen * sPriv)
1449 {
1450    const __DRIconfig **configs;
1451    struct dri_screen *screen;
1452    struct pipe_screen *pscreen = NULL;
1453    const struct drm_conf_ret *throttle_ret;
1454    const struct drm_conf_ret *dmabuf_ret;
1455    int fd = -1;
1456
1457    screen = CALLOC_STRUCT(dri_screen);
1458    if (!screen)
1459       return NULL;
1460
1461    screen->sPriv = sPriv;
1462    screen->fd = sPriv->fd;
1463    pipe_mutex_init(screen->opencl_func_mutex);
1464
1465    sPriv->driverPrivate = (void *)screen;
1466
1467    if (screen->fd < 0 || (fd = dup(screen->fd)) < 0)
1468       goto fail;
1469
1470    if (pipe_loader_drm_probe_fd(&screen->dev, fd))
1471       pscreen = pipe_loader_create_screen(screen->dev);
1472
1473    if (!pscreen)
1474        goto fail;
1475
1476    throttle_ret = pipe_loader_configuration(screen->dev, DRM_CONF_THROTTLE);
1477    dmabuf_ret = pipe_loader_configuration(screen->dev, DRM_CONF_SHARE_FD);
1478
1479    if (throttle_ret && throttle_ret->val.val_int != -1) {
1480       screen->throttling_enabled = TRUE;
1481       screen->default_throttle_frames = throttle_ret->val.val_int;
1482    }
1483
1484    if (dmabuf_ret && dmabuf_ret->val.val_bool) {
1485       uint64_t cap;
1486
1487       if (drmGetCap(sPriv->fd, DRM_CAP_PRIME, &cap) == 0 &&
1488           (cap & DRM_PRIME_CAP_IMPORT)) {
1489          dri2ImageExtension.createImageFromFds = dri2_from_fds;
1490          dri2ImageExtension.createImageFromDmaBufs = dri2_from_dma_bufs;
1491       }
1492    }
1493
1494    if (pscreen->get_param(pscreen, PIPE_CAP_DEVICE_RESET_STATUS_QUERY)) {
1495       sPriv->extensions = dri_robust_screen_extensions;
1496       screen->has_reset_status_query = true;
1497    }
1498    else
1499       sPriv->extensions = dri_screen_extensions;
1500
1501    configs = dri_init_screen_helper(screen, pscreen, screen->dev->driver_name);
1502    if (!configs)
1503       goto fail;
1504
1505    screen->can_share_buffer = true;
1506    screen->auto_fake_front = dri_with_format(sPriv);
1507    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
1508    screen->lookup_egl_image = dri2_lookup_egl_image;
1509
1510    return configs;
1511 fail:
1512    dri_destroy_screen_helper(screen);
1513    if (screen->dev)
1514       pipe_loader_release(&screen->dev, 1);
1515    else
1516       close(fd);
1517    FREE(screen);
1518    return NULL;
1519 }
1520
1521 /**
1522  * This is the driver specific part of the createNewScreen entry point.
1523  *
1524  * Returns the struct gl_config supported by this driver.
1525  */
1526 static const __DRIconfig **
1527 dri_kms_init_screen(__DRIscreen * sPriv)
1528 {
1529 #if defined(GALLIUM_SOFTPIPE)
1530    const __DRIconfig **configs;
1531    struct dri_screen *screen;
1532    struct pipe_screen *pscreen = NULL;
1533    uint64_t cap;
1534    int fd = -1;
1535
1536    screen = CALLOC_STRUCT(dri_screen);
1537    if (!screen)
1538       return NULL;
1539
1540    screen->sPriv = sPriv;
1541    screen->fd = sPriv->fd;
1542
1543    sPriv->driverPrivate = (void *)screen;
1544
1545    if (screen->fd < 0 || (fd = dup(screen->fd)) < 0)
1546       goto fail;
1547
1548    if (pipe_loader_sw_probe_kms(&screen->dev, fd))
1549       pscreen = pipe_loader_create_screen(screen->dev);
1550
1551    if (!pscreen)
1552        goto fail;
1553
1554    if (drmGetCap(sPriv->fd, DRM_CAP_PRIME, &cap) == 0 &&
1555           (cap & DRM_PRIME_CAP_IMPORT)) {
1556       dri2ImageExtension.createImageFromFds = dri2_from_fds;
1557       dri2ImageExtension.createImageFromDmaBufs = dri2_from_dma_bufs;
1558    }
1559
1560    sPriv->extensions = dri_screen_extensions;
1561
1562    configs = dri_init_screen_helper(screen, pscreen, "swrast");
1563    if (!configs)
1564       goto fail;
1565
1566    screen->can_share_buffer = false;
1567    screen->auto_fake_front = dri_with_format(sPriv);
1568    screen->broken_invalidate = !sPriv->dri2.useInvalidate;
1569    screen->lookup_egl_image = dri2_lookup_egl_image;
1570
1571    return configs;
1572 fail:
1573    dri_destroy_screen_helper(screen);
1574    if (screen->dev)
1575       pipe_loader_release(&screen->dev, 1);
1576    else
1577       close(fd);
1578    FREE(screen);
1579 #endif // GALLIUM_SOFTPIPE
1580    return NULL;
1581 }
1582
1583 static boolean
1584 dri2_create_buffer(__DRIscreen * sPriv,
1585                    __DRIdrawable * dPriv,
1586                    const struct gl_config * visual, boolean isPixmap)
1587 {
1588    struct dri_drawable *drawable = NULL;
1589
1590    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
1591       return FALSE;
1592
1593    drawable = dPriv->driverPrivate;
1594
1595    drawable->allocate_textures = dri2_allocate_textures;
1596    drawable->flush_frontbuffer = dri2_flush_frontbuffer;
1597    drawable->update_tex_buffer = dri2_update_tex_buffer;
1598
1599    return TRUE;
1600 }
1601
1602 /**
1603  * DRI driver virtual function table.
1604  *
1605  * DRI versions differ in their implementation of init_screen and swap_buffers.
1606  */
1607 const struct __DriverAPIRec galliumdrm_driver_api = {
1608    .InitScreen = dri2_init_screen,
1609    .DestroyScreen = dri_destroy_screen,
1610    .CreateContext = dri_create_context,
1611    .DestroyContext = dri_destroy_context,
1612    .CreateBuffer = dri2_create_buffer,
1613    .DestroyBuffer = dri_destroy_buffer,
1614    .MakeCurrent = dri_make_current,
1615    .UnbindContext = dri_unbind_context,
1616
1617    .AllocateBuffer = dri2_allocate_buffer,
1618    .ReleaseBuffer  = dri2_release_buffer,
1619 };
1620
1621 /**
1622  * DRI driver virtual function table.
1623  *
1624  * KMS/DRM version of the DriverAPI above sporting a different InitScreen
1625  * hook. The latter is used to explicitly initialise the kms_swrast driver
1626  * rather than selecting the approapriate driver as suggested by the loader.
1627  */
1628 const struct __DriverAPIRec dri_kms_driver_api = {
1629    .InitScreen = dri_kms_init_screen,
1630    .DestroyScreen = dri_destroy_screen,
1631    .CreateContext = dri_create_context,
1632    .DestroyContext = dri_destroy_context,
1633    .CreateBuffer = dri2_create_buffer,
1634    .DestroyBuffer = dri_destroy_buffer,
1635    .MakeCurrent = dri_make_current,
1636    .UnbindContext = dri_unbind_context,
1637
1638    .AllocateBuffer = dri2_allocate_buffer,
1639    .ReleaseBuffer  = dri2_release_buffer,
1640 };
1641
1642 /* This is the table of extensions that the loader will dlsym() for. */
1643 const __DRIextension *galliumdrm_driver_extensions[] = {
1644     &driCoreExtension.base,
1645     &driImageDriverExtension.base,
1646     &driDRI2Extension.base,
1647     &gallium_config_options.base,
1648     NULL
1649 };
1650
1651 /* vim: set sw=3 ts=8 sts=3 expandtab: */