src/egl/drivers/dri2/platform_drm.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdint.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <xf86drm.h>
  33 #include <dlfcn.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <fcntl.h>
  37 #include <unistd.h>
  38
  39 #include "egl_dri2.h"
  40 #include "egl_dri2_fallbacks.h"
  41 #include "loader.h"
  42
  43 static struct gbm_bo *
  44 lock_front_buffer(struct gbm_surface *_surf)
  45 {
  46    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  47    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  48    struct gbm_dri_device *device = (struct gbm_dri_device *) _surf->gbm;
  49    struct gbm_bo *bo;
  50
  51    if (dri2_surf->current == NULL) {
  52       _eglError(EGL_BAD_SURFACE, "no front buffer");
  53       return NULL;
  54    }
  55
  56    bo = dri2_surf->current->bo;
  57
  58    if (device->dri2) {
  59       dri2_surf->current->locked = 1;
  60       dri2_surf->current = NULL;
  61    }
  62
  63    return bo;
  64 }
  65
  66 static void
  67 release_buffer(struct gbm_surface *_surf, struct gbm_bo *bo)
  68 {
  69    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  70    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  71    unsigned i;
  72
  73    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
  74       if (dri2_surf->color_buffers[i].bo == bo) {
  75          dri2_surf->color_buffers[i].locked = 0;
  76       }
  77    }
  78 }
  79
  80 static int
  81 has_free_buffers(struct gbm_surface *_surf)
  82 {
  83    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  84    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  85    unsigned i;
  86
  87    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
  88       if (!dri2_surf->color_buffers[i].locked)
  89          return 1;
  90
  91    return 0;
  92 }
  93
  94 static _EGLSurface *
  95 dri2_drm_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
  96                         _EGLConfig *conf, void *native_window,
  97                         const EGLint *attrib_list)
  98 {
  99    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 100    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 101    struct dri2_egl_surface *dri2_surf;
 102    struct gbm_surface *window = native_window;
 103    struct gbm_dri_surface *surf;
 104    const __DRIconfig *config;
 105
 106    (void) drv;
 107
 108    dri2_surf = calloc(1, sizeof *dri2_surf);
 109    if (!dri2_surf) {
 110       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 111       return NULL;
 112    }
 113
 114    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 115       goto cleanup_surf;
 116
 117    switch (type) {
 118    case EGL_WINDOW_BIT:
 119       if (!window) {
 120          _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 121          goto cleanup_surf;
 122       }
 123
 124       surf = gbm_dri_surface(window);
 125       dri2_surf->gbm_surf = surf;
 126       dri2_surf->base.Width =  surf->base.width;
 127       dri2_surf->base.Height = surf->base.height;
 128       surf->dri_private = dri2_surf;
 129       break;
 130    default:
 131       goto cleanup_surf;
 132    }
 133
 134    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 135                                 dri2_surf->base.GLColorspace);
 136
 137    if (dri2_dpy->dri2) {
 138       dri2_surf->dri_drawable =
 139          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 140                                            dri2_surf->gbm_surf);
 141
 142    } else {
 143       assert(dri2_dpy->swrast != NULL);
 144
 145       dri2_surf->dri_drawable =
 146          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 147                                              dri2_surf->gbm_surf);
 148
 149    }
 150    if (dri2_surf->dri_drawable == NULL) {
 151       _eglError(EGL_BAD_ALLOC, "createNewDrawable()");
 152       goto cleanup_surf;
 153    }
 154
 155    return &dri2_surf->base;
 156
 157  cleanup_surf:
 158    free(dri2_surf);
 159
 160    return NULL;
 161 }
 162
 163 static _EGLSurface *
 164 dri2_drm_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 165                                _EGLConfig *conf, void *native_window,
 166                                const EGLint *attrib_list)
 167 {
 168    return dri2_drm_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 169                                   native_window, attrib_list);
 170 }
 171
 172 static _EGLSurface *
 173 dri2_drm_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 174                                _EGLConfig *conf, void *native_window,
 175                                const EGLint *attrib_list)
 176 {
 177    /* From the EGL_MESA_platform_gbm spec, version 5:
 178     *
 179     *  It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 180     *  that belongs to the GBM platform. Any such call fails and generates
 181     *  EGL_BAD_PARAMETER.
 182     */
 183    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on GBM");
 184    return NULL;
 185 }
 186
 187 static EGLBoolean
 188 dri2_drm_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 189 {
 190    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 191    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 192    unsigned i;
 193
 194    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 195
 196    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 197       if (dri2_surf->color_buffers[i].bo)
 198          gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
 199    }
 200
 201    for (i = 0; i < __DRI_BUFFER_COUNT; i++) {
 202       if (dri2_surf->dri_buffers[i])
 203          dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
 204                                        dri2_surf->dri_buffers[i]);
 205    }
 206
 207    free(surf);
 208
 209    return EGL_TRUE;
 210 }
 211
 212 static int
 213 get_back_bo(struct dri2_egl_surface *dri2_surf)
 214 {
 215    struct dri2_egl_display *dri2_dpy =
 216       dri2_egl_display(dri2_surf->base.Resource.Display);
 217    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 218    int age = 0;
 219    unsigned i;
 220
 221    if (dri2_surf->back == NULL) {
 222       for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 223          if (!dri2_surf->color_buffers[i].locked &&
 224               dri2_surf->color_buffers[i].age >= age) {
 225             dri2_surf->back = &dri2_surf->color_buffers[i];
 226             age = dri2_surf->color_buffers[i].age;
 227          }
 228       }
 229    }
 230
 231    if (dri2_surf->back == NULL)
 232       return -1;
 233    if (dri2_surf->back->bo == NULL) {
 234       if (surf->base.modifiers)
 235          dri2_surf->back->bo = gbm_bo_create_with_modifiers(&dri2_dpy->gbm_dri->base,
 236                                                             surf->base.width, surf->base.height,
 237                                                             surf->base.format,
 238                                                             surf->base.modifiers,
 239                                                             surf->base.count);
 240       else
 241          dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 242                                              surf->base.width,
 243                                              surf->base.height,
 244                                              surf->base.format,
 245                                              surf->base.flags);
 246
 247    }
 248    if (dri2_surf->back->bo == NULL)
 249       return -1;
 250
 251    return 0;
 252 }
 253
 254 static int
 255 get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
 256 {
 257    struct dri2_egl_display *dri2_dpy =
 258       dri2_egl_display(dri2_surf->base.Resource.Display);
 259    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 260
 261    if (dri2_surf->current == NULL) {
 262       assert(!dri2_surf->color_buffers[0].locked);
 263       dri2_surf->current = &dri2_surf->color_buffers[0];
 264    }
 265
 266    if (dri2_surf->current->bo == NULL)
 267       dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 268                                              surf->base.width, surf->base.height,
 269                                              surf->base.format, surf->base.flags);
 270    if (dri2_surf->current->bo == NULL)
 271       return -1;
 272
 273    return 0;
 274 }
 275
 276 static void
 277 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 278 {
 279    struct dri2_egl_display *dri2_dpy =
 280       dri2_egl_display(dri2_surf->base.Resource.Display);
 281    struct gbm_dri_bo *bo;
 282    int name, pitch;
 283
 284    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 285
 286    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 287    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 288
 289    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 290    buffer->name = name;
 291    buffer->pitch = pitch;
 292    buffer->cpp = 4;
 293    buffer->flags = 0;
 294 }
 295
 296 static int
 297 get_aux_bo(struct dri2_egl_surface *dri2_surf,
 298            unsigned int attachment, unsigned int format, __DRIbuffer *buffer)
 299 {
 300    struct dri2_egl_display *dri2_dpy =
 301       dri2_egl_display(dri2_surf->base.Resource.Display);
 302    __DRIbuffer *b = dri2_surf->dri_buffers[attachment];
 303
 304    if (b == NULL) {
 305       b = dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen,
 306                                          attachment, format,
 307                                          dri2_surf->base.Width,
 308                                          dri2_surf->base.Height);
 309       dri2_surf->dri_buffers[attachment] = b;
 310    }
 311    if (b == NULL)
 312       return -1;
 313
 314    memcpy(buffer, b, sizeof *buffer);
 315
 316    return 0;
 317 }
 318
 319 static __DRIbuffer *
 320 dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
 321                              int *width, int *height,
 322                              unsigned int *attachments, int count,
 323                              int *out_count, void *loaderPrivate)
 324 {
 325    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 326    int i, j;
 327
 328    dri2_surf->buffer_count = 0;
 329    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 330       assert(attachments[i] < __DRI_BUFFER_COUNT);
 331       assert(dri2_surf->buffer_count < 5);
 332
 333       switch (attachments[i]) {
 334       case __DRI_BUFFER_BACK_LEFT:
 335          if (get_back_bo(dri2_surf) < 0) {
 336             _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 337             return NULL;
 338          }
 339          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 340          break;
 341       default:
 342          if (get_aux_bo(dri2_surf, attachments[i], attachments[i + 1],
 343                         &dri2_surf->buffers[j]) < 0) {
 344             _eglError(EGL_BAD_ALLOC, "failed to allocate aux buffer");
 345             return NULL;
 346          }
 347          break;
 348       }
 349    }
 350
 351    *out_count = j;
 352    if (j == 0)
 353       return NULL;
 354
 355    *width = dri2_surf->base.Width;
 356    *height = dri2_surf->base.Height;
 357
 358    return dri2_surf->buffers;
 359 }
 360
 361 static __DRIbuffer *
 362 dri2_drm_get_buffers(__DRIdrawable * driDrawable,
 363                      int *width, int *height,
 364                      unsigned int *attachments, int count,
 365                      int *out_count, void *loaderPrivate)
 366 {
 367    unsigned int *attachments_with_format;
 368    __DRIbuffer *buffer;
 369    const unsigned int format = 32;
 370    int i;
 371
 372    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 373    if (!attachments_with_format) {
 374       *out_count = 0;
 375       return NULL;
 376    }
 377
 378    for (i = 0; i < count; ++i) {
 379       attachments_with_format[2*i] = attachments[i];
 380       attachments_with_format[2*i + 1] = format;
 381    }
 382
 383    buffer =
 384       dri2_drm_get_buffers_with_format(driDrawable,
 385                                        width, height,
 386                                        attachments_with_format, count,
 387                                        out_count, loaderPrivate);
 388
 389    free(attachments_with_format);
 390
 391    return buffer;
 392 }
 393
 394 static int
 395 dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
 396                            unsigned int format,
 397                            uint32_t *stamp,
 398                            void *loaderPrivate,
 399                            uint32_t buffer_mask,
 400                            struct __DRIimageList *buffers)
 401 {
 402    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 403    struct gbm_dri_bo *bo;
 404
 405    if (get_back_bo(dri2_surf) < 0)
 406       return 0;
 407
 408    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 409    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 410    buffers->back = bo->image;
 411
 412    return 1;
 413 }
 414
 415 static void
 416 dri2_drm_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 417 {
 418    (void) driDrawable;
 419    (void) loaderPrivate;
 420 }
 421
 422 static EGLBoolean
 423 dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 424 {
 425    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 426    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 427    unsigned i;
 428
 429    if (!dri2_dpy->flush) {
 430       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 431    } else {
 432       if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
 433          if (dri2_surf->current)
 434             _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 435          for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 436             if (dri2_surf->color_buffers[i].age > 0)
 437                dri2_surf->color_buffers[i].age++;
 438
 439          /* Make sure we have a back buffer in case we're swapping without
 440           * ever rendering. */
 441          if (get_back_bo(dri2_surf) < 0) {
 442             _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 443             return EGL_FALSE;
 444          }
 445
 446          dri2_surf->current = dri2_surf->back;
 447          dri2_surf->current->age = 1;
 448          dri2_surf->back = NULL;
 449       }
 450
 451       dri2_flush_drawable_for_swapbuffers(disp, draw);
 452       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 453    }
 454
 455    return EGL_TRUE;
 456 }
 457
 458 static EGLint
 459 dri2_drm_query_buffer_age(_EGLDriver *drv,
 460                           _EGLDisplay *disp, _EGLSurface *surface)
 461 {
 462    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 463
 464    if (get_back_bo(dri2_surf) < 0) {
 465       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 466       return 0;
 467    }
 468
 469    return dri2_surf->back->age;
 470 }
 471
 472 static _EGLImage *
 473 dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 474                                  EGLClientBuffer buffer, const EGLint *attr_list)
 475 {
 476    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 477    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 478    struct dri2_egl_image *dri2_img;
 479
 480    dri2_img = malloc(sizeof *dri2_img);
 481    if (!dri2_img) {
 482       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 483       return NULL;
 484    }
 485
 486    if (!_eglInitImage(&dri2_img->base, disp)) {
 487       free(dri2_img);
 488       return NULL;
 489    }
 490
 491    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 492    if (dri2_img->dri_image == NULL) {
 493       free(dri2_img);
 494       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 495       return NULL;
 496    }
 497
 498    return &dri2_img->base;
 499 }
 500
 501 static _EGLImage *
 502 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 503                           _EGLContext *ctx, EGLenum target,
 504                           EGLClientBuffer buffer, const EGLint *attr_list)
 505 {
 506    (void) drv;
 507
 508    switch (target) {
 509    case EGL_NATIVE_PIXMAP_KHR:
 510       return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 511    default:
 512       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 513    }
 514 }
 515
 516 static int
 517 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 518 {
 519    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 520
 521    return drmAuthMagic(dri2_dpy->fd, id);
 522 }
 523
 524 static void
 525 swrast_put_image2(__DRIdrawable *driDrawable,
 526                   int            op,
 527                   int            x,
 528                   int            y,
 529                   int            width,
 530                   int            height,
 531                   int            stride,
 532                   char          *data,
 533                   void          *loaderPrivate)
 534 {
 535    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 536    int internal_stride, i;
 537    struct gbm_dri_bo *bo;
 538
 539    if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
 540        op != __DRI_SWRAST_IMAGE_OP_SWAP)
 541       return;
 542
 543    if (get_swrast_front_bo(dri2_surf) < 0)
 544       return;
 545
 546    bo = gbm_dri_bo(dri2_surf->current->bo);
 547    if (gbm_dri_bo_map_dumb(bo) == NULL)
 548       return;
 549
 550    internal_stride = bo->base.stride;
 551
 552    for (i = 0; i < height; i++) {
 553       memcpy(bo->map + (x + i) * internal_stride + y,
 554              data + i * stride, stride);
 555    }
 556
 557    gbm_dri_bo_unmap_dumb(bo);
 558 }
 559
 560 static void
 561 swrast_get_image(__DRIdrawable *driDrawable,
 562                  int            x,
 563                  int            y,
 564                  int            width,
 565                  int            height,
 566                  char          *data,
 567                  void          *loaderPrivate)
 568 {
 569    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 570    int internal_stride, stride, i;
 571    struct gbm_dri_bo *bo;
 572
 573    if (get_swrast_front_bo(dri2_surf) < 0)
 574       return;
 575
 576    bo = gbm_dri_bo(dri2_surf->current->bo);
 577    if (gbm_dri_bo_map_dumb(bo) == NULL)
 578       return;
 579
 580    internal_stride = bo->base.stride;
 581    stride = width * 4;
 582
 583    for (i = 0; i < height; i++) {
 584       memcpy(data + i * stride,
 585              bo->map + (x + i) * internal_stride + y, stride);
 586    }
 587
 588    gbm_dri_bo_unmap_dumb(bo);
 589 }
 590
 591 static EGLBoolean
 592 drm_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
 593 {
 594    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 595    static const struct {
 596       int format;
 597       unsigned int red_mask;
 598       unsigned int alpha_mask;
 599    } visuals[] = {
 600       { GBM_FORMAT_XRGB2101010, 0x3ff00000, 0x00000000 },
 601       { GBM_FORMAT_ARGB2101010, 0x3ff00000, 0xc0000000 },
 602       { GBM_FORMAT_XRGB8888,    0x00ff0000, 0x00000000 },
 603       { GBM_FORMAT_ARGB8888,    0x00ff0000, 0xff000000 },
 604       { GBM_FORMAT_RGB565,      0x0000f800, 0x00000000 },
 605    };
 606    EGLint attr_list[] = {
 607       EGL_NATIVE_VISUAL_ID, 0,
 608       EGL_NONE,
 609    };
 610    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
 611    unsigned int count, i, j;
 612
 613    count = 0;
 614    for (i = 0; dri2_dpy->driver_configs[i]; i++) {
 615       unsigned int red, alpha;
 616
 617       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 618                                       __DRI_ATTRIB_RED_MASK, &red);
 619       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 620                                       __DRI_ATTRIB_ALPHA_MASK, &alpha);
 621
 622       for (j = 0; j < ARRAY_SIZE(visuals); j++) {
 623          struct dri2_egl_config *dri2_conf;
 624
 625          if (visuals[j].red_mask != red || visuals[j].alpha_mask != alpha)
 626             continue;
 627
 628          attr_list[1] = visuals[j].format;
 629
 630          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
 631                count + 1, EGL_WINDOW_BIT, attr_list, NULL);
 632          if (dri2_conf) {
 633             count++;
 634             format_count[j]++;
 635          }
 636       }
 637    }
 638
 639    for (i = 0; i < ARRAY_SIZE(format_count); i++) {
 640       if (!format_count[i]) {
 641          _eglLog(_EGL_DEBUG, "No DRI config supports native format 0x%x",
 642                  visuals[i].format);
 643       }
 644    }
 645
 646    return (count != 0);
 647 }
 648
 649 static const struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
 650    .authenticate = dri2_drm_authenticate,
 651    .create_window_surface = dri2_drm_create_window_surface,
 652    .create_pixmap_surface = dri2_drm_create_pixmap_surface,
 653    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
 654    .destroy_surface = dri2_drm_destroy_surface,
 655    .create_image = dri2_drm_create_image_khr,
 656    .swap_interval = dri2_fallback_swap_interval,
 657    .swap_buffers = dri2_drm_swap_buffers,
 658    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 659    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 660    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 661    .copy_buffers = dri2_fallback_copy_buffers,
 662    .query_buffer_age = dri2_drm_query_buffer_age,
 663    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 664    .get_sync_values = dri2_fallback_get_sync_values,
 665    .get_dri_drawable = dri2_surface_get_dri_drawable,
 666 };
 667
 668 EGLBoolean
 669 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 670 {
 671    struct dri2_egl_display *dri2_dpy;
 672    struct gbm_device *gbm;
 673    const char *err;
 674    int fd = -1;
 675
 676    loader_set_logger(_eglLog);
 677
 678    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 679    if (!dri2_dpy)
 680       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 681
 682    dri2_dpy->fd = -1;
 683    disp->DriverData = (void *) dri2_dpy;
 684
 685    gbm = disp->PlatformDisplay;
 686    if (gbm == NULL) {
 687       char buf[64];
 688       int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
 689       if (n != -1 && n < sizeof(buf))
 690          fd = loader_open_device(buf);
 691       if (fd < 0)
 692          fd = loader_open_device("/dev/dri/card0");
 693       gbm = gbm_create_device(fd);
 694       if (gbm == NULL) {
 695          err = "DRI2: failed to create gbm device";
 696          goto cleanup;
 697       }
 698       dri2_dpy->own_device = 1;
 699    } else {
 700       fd = fcntl(gbm_device_get_fd(gbm), F_DUPFD_CLOEXEC, 3);
 701       if (fd < 0) {
 702          err = "DRI2: failed to fcntl() existing gbm device";
 703          goto cleanup;
 704       }
 705    }
 706
 707    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 708       err = "DRI2: gbm device using incorrect/incompatible backend";
 709       goto cleanup;
 710    }
 711
 712    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 713    dri2_dpy->fd = fd;
 714    dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->driver_name);
 715
 716    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 717    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 718    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 719    dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
 720    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 721
 722    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 723    dri2_dpy->gbm_dri->lookup_user_data = disp;
 724
 725    dri2_dpy->gbm_dri->get_buffers = dri2_drm_get_buffers;
 726    dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
 727    dri2_dpy->gbm_dri->get_buffers_with_format = dri2_drm_get_buffers_with_format;
 728    dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
 729    dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
 730    dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
 731
 732    dri2_dpy->gbm_dri->base.surface_lock_front_buffer = lock_front_buffer;
 733    dri2_dpy->gbm_dri->base.surface_release_buffer = release_buffer;
 734    dri2_dpy->gbm_dri->base.surface_has_free_buffers = has_free_buffers;
 735
 736    if (!dri2_setup_extensions(disp)) {
 737       err = "DRI2: failed to find required DRI extensions";
 738       goto cleanup;
 739    }
 740
 741    dri2_setup_screen(disp);
 742
 743    if (!drm_add_configs_for_visuals(drv, disp)) {
 744       err = "DRI2: failed to add configs";
 745       goto cleanup;
 746    }
 747
 748    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
 749    if (dri2_dpy->dri2)
 750       disp->Extensions.EXT_buffer_age = EGL_TRUE;
 751
 752 #ifdef HAVE_WAYLAND_PLATFORM
 753    dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 754 #endif
 755    dri2_set_WL_bind_wayland_display(drv, disp);
 756
 757    /* Fill vtbl last to prevent accidentally calling virtual function during
 758     * initialization.
 759     */
 760    dri2_dpy->vtbl = &dri2_drm_display_vtbl;
 761
 762    return EGL_TRUE;
 763
 764 cleanup:
 765    dri2_display_destroy(disp);
 766    return _eglError(EGL_NOT_INITIALIZED, err);
 767 }