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       dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base.base,
 235                                           surf->base.width, surf->base.height,
 236                                           surf->base.format, surf->base.flags);
 237    if (dri2_surf->back->bo == NULL)
 238       return -1;
 239
 240    return 0;
 241 }
 242
 243 static int
 244 get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
 245 {
 246    struct dri2_egl_display *dri2_dpy =
 247       dri2_egl_display(dri2_surf->base.Resource.Display);
 248    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 249
 250    if (dri2_surf->current == NULL) {
 251       assert(!dri2_surf->color_buffers[0].locked);
 252       dri2_surf->current = &dri2_surf->color_buffers[0];
 253    }
 254
 255    if (dri2_surf->current->bo == NULL)
 256       dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base.base,
 257                                              surf->base.width, surf->base.height,
 258                                              surf->base.format, surf->base.flags);
 259    if (dri2_surf->current->bo == NULL)
 260       return -1;
 261
 262    return 0;
 263 }
 264
 265 static void
 266 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 267 {
 268    struct dri2_egl_display *dri2_dpy =
 269       dri2_egl_display(dri2_surf->base.Resource.Display);
 270    struct gbm_dri_bo *bo;
 271    int name, pitch;
 272
 273    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 274
 275    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 276    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 277
 278    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 279    buffer->name = name;
 280    buffer->pitch = pitch;
 281    buffer->cpp = 4;
 282    buffer->flags = 0;
 283 }
 284
 285 static int
 286 get_aux_bo(struct dri2_egl_surface *dri2_surf,
 287            unsigned int attachment, unsigned int format, __DRIbuffer *buffer)
 288 {
 289    struct dri2_egl_display *dri2_dpy =
 290       dri2_egl_display(dri2_surf->base.Resource.Display);
 291    __DRIbuffer *b = dri2_surf->dri_buffers[attachment];
 292
 293    if (b == NULL) {
 294       b = dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen,
 295                                          attachment, format,
 296                                          dri2_surf->base.Width,
 297                                          dri2_surf->base.Height);
 298       dri2_surf->dri_buffers[attachment] = b;
 299    }
 300    if (b == NULL)
 301       return -1;
 302
 303    memcpy(buffer, b, sizeof *buffer);
 304
 305    return 0;
 306 }
 307
 308 static __DRIbuffer *
 309 dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
 310                              int *width, int *height,
 311                              unsigned int *attachments, int count,
 312                              int *out_count, void *loaderPrivate)
 313 {
 314    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 315    int i, j;
 316
 317    dri2_surf->buffer_count = 0;
 318    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 319       assert(attachments[i] < __DRI_BUFFER_COUNT);
 320       assert(dri2_surf->buffer_count < 5);
 321
 322       switch (attachments[i]) {
 323       case __DRI_BUFFER_BACK_LEFT:
 324          if (get_back_bo(dri2_surf) < 0) {
 325             _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 326             return NULL;
 327          }
 328          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 329          break;
 330       default:
 331          if (get_aux_bo(dri2_surf, attachments[i], attachments[i + 1],
 332                         &dri2_surf->buffers[j]) < 0) {
 333             _eglError(EGL_BAD_ALLOC, "failed to allocate aux buffer");
 334             return NULL;
 335          }
 336          break;
 337       }
 338    }
 339
 340    *out_count = j;
 341    if (j == 0)
 342       return NULL;
 343
 344    *width = dri2_surf->base.Width;
 345    *height = dri2_surf->base.Height;
 346
 347    return dri2_surf->buffers;
 348 }
 349
 350 static __DRIbuffer *
 351 dri2_drm_get_buffers(__DRIdrawable * driDrawable,
 352                      int *width, int *height,
 353                      unsigned int *attachments, int count,
 354                      int *out_count, void *loaderPrivate)
 355 {
 356    unsigned int *attachments_with_format;
 357    __DRIbuffer *buffer;
 358    const unsigned int format = 32;
 359    int i;
 360
 361    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 362    if (!attachments_with_format) {
 363       *out_count = 0;
 364       return NULL;
 365    }
 366
 367    for (i = 0; i < count; ++i) {
 368       attachments_with_format[2*i] = attachments[i];
 369       attachments_with_format[2*i + 1] = format;
 370    }
 371
 372    buffer =
 373       dri2_drm_get_buffers_with_format(driDrawable,
 374                                        width, height,
 375                                        attachments_with_format, count,
 376                                        out_count, loaderPrivate);
 377
 378    free(attachments_with_format);
 379
 380    return buffer;
 381 }
 382
 383 static int
 384 dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
 385                            unsigned int format,
 386                            uint32_t *stamp,
 387                            void *loaderPrivate,
 388                            uint32_t buffer_mask,
 389                            struct __DRIimageList *buffers)
 390 {
 391    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 392    struct gbm_dri_bo *bo;
 393
 394    if (get_back_bo(dri2_surf) < 0)
 395       return 0;
 396
 397    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 398    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 399    buffers->back = bo->image;
 400
 401    return 1;
 402 }
 403
 404 static void
 405 dri2_drm_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 406 {
 407    (void) driDrawable;
 408    (void) loaderPrivate;
 409 }
 410
 411 static EGLBoolean
 412 dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 413 {
 414    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 415    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 416    unsigned i;
 417
 418    if (dri2_dpy->swrast) {
 419       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 420    } else {
 421       if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
 422          if (dri2_surf->current)
 423             _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 424          for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 425             if (dri2_surf->color_buffers[i].age > 0)
 426                dri2_surf->color_buffers[i].age++;
 427
 428          /* Make sure we have a back buffer in case we're swapping without
 429           * ever rendering. */
 430          if (get_back_bo(dri2_surf) < 0) {
 431             _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 432             return EGL_FALSE;
 433          }
 434
 435          dri2_surf->current = dri2_surf->back;
 436          dri2_surf->current->age = 1;
 437          dri2_surf->back = NULL;
 438       }
 439
 440       dri2_flush_drawable_for_swapbuffers(disp, draw);
 441       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 442    }
 443
 444    return EGL_TRUE;
 445 }
 446
 447 static EGLint
 448 dri2_drm_query_buffer_age(_EGLDriver *drv,
 449                           _EGLDisplay *disp, _EGLSurface *surface)
 450 {
 451    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 452
 453    if (get_back_bo(dri2_surf) < 0) {
 454       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 455       return 0;
 456    }
 457
 458    return dri2_surf->back->age;
 459 }
 460
 461 static _EGLImage *
 462 dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 463                                  EGLClientBuffer buffer, const EGLint *attr_list)
 464 {
 465    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 466    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 467    struct dri2_egl_image *dri2_img;
 468
 469    dri2_img = malloc(sizeof *dri2_img);
 470    if (!dri2_img) {
 471       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 472       return NULL;
 473    }
 474
 475    if (!_eglInitImage(&dri2_img->base, disp)) {
 476       free(dri2_img);
 477       return NULL;
 478    }
 479
 480    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 481    if (dri2_img->dri_image == NULL) {
 482       free(dri2_img);
 483       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 484       return NULL;
 485    }
 486
 487    return &dri2_img->base;
 488 }
 489
 490 static _EGLImage *
 491 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 492                           _EGLContext *ctx, EGLenum target,
 493                           EGLClientBuffer buffer, const EGLint *attr_list)
 494 {
 495    (void) drv;
 496
 497    switch (target) {
 498    case EGL_NATIVE_PIXMAP_KHR:
 499       return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 500    default:
 501       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 502    }
 503 }
 504
 505 static int
 506 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 507 {
 508    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 509
 510    return drmAuthMagic(dri2_dpy->fd, id);
 511 }
 512
 513 static void
 514 swrast_put_image2(__DRIdrawable *driDrawable,
 515                   int            op,
 516                   int            x,
 517                   int            y,
 518                   int            width,
 519                   int            height,
 520                   int            stride,
 521                   char          *data,
 522                   void          *loaderPrivate)
 523 {
 524    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 525    int internal_stride, i;
 526    struct gbm_dri_bo *bo;
 527
 528    if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
 529        op != __DRI_SWRAST_IMAGE_OP_SWAP)
 530       return;
 531
 532    if (get_swrast_front_bo(dri2_surf) < 0)
 533       return;
 534
 535    bo = gbm_dri_bo(dri2_surf->current->bo);
 536    if (gbm_dri_bo_map_dumb(bo) == NULL)
 537       return;
 538
 539    internal_stride = bo->base.base.stride;
 540
 541    for (i = 0; i < height; i++) {
 542       memcpy(bo->map + (x + i) * internal_stride + y,
 543              data + i * stride, stride);
 544    }
 545
 546    gbm_dri_bo_unmap_dumb(bo);
 547 }
 548
 549 static void
 550 swrast_get_image(__DRIdrawable *driDrawable,
 551                  int            x,
 552                  int            y,
 553                  int            width,
 554                  int            height,
 555                  char          *data,
 556                  void          *loaderPrivate)
 557 {
 558    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 559    int internal_stride, stride, i;
 560    struct gbm_dri_bo *bo;
 561
 562    if (get_swrast_front_bo(dri2_surf) < 0)
 563       return;
 564
 565    bo = gbm_dri_bo(dri2_surf->current->bo);
 566    if (gbm_dri_bo_map_dumb(bo) == NULL)
 567       return;
 568
 569    internal_stride = bo->base.base.stride;
 570    stride = width * 4;
 571
 572    for (i = 0; i < height; i++) {
 573       memcpy(data + i * stride,
 574              bo->map + (x + i) * internal_stride + y, stride);
 575    }
 576
 577    gbm_dri_bo_unmap_dumb(bo);
 578 }
 579
 580 static EGLBoolean
 581 drm_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
 582 {
 583    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 584    static const struct {
 585       int format;
 586       unsigned int red_mask;
 587       unsigned int alpha_mask;
 588    } visuals[] = {
 589       { GBM_FORMAT_XRGB2101010, 0x3ff00000, 0x00000000 },
 590       { GBM_FORMAT_ARGB2101010, 0x3ff00000, 0xc0000000 },
 591       { GBM_FORMAT_XRGB8888,    0x00ff0000, 0x00000000 },
 592       { GBM_FORMAT_ARGB8888,    0x00ff0000, 0xff000000 },
 593       { GBM_FORMAT_RGB565,      0x0000f800, 0x00000000 },
 594    };
 595    EGLint attr_list[] = {
 596       EGL_NATIVE_VISUAL_ID, 0,
 597       EGL_NONE,
 598    };
 599    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
 600    unsigned int count, i, j;
 601
 602    count = 0;
 603    for (i = 0; dri2_dpy->driver_configs[i]; i++) {
 604       unsigned int red, alpha;
 605
 606       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 607                                       __DRI_ATTRIB_RED_MASK, &red);
 608       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 609                                       __DRI_ATTRIB_ALPHA_MASK, &alpha);
 610
 611       for (j = 0; j < ARRAY_SIZE(visuals); j++) {
 612          struct dri2_egl_config *dri2_conf;
 613
 614          if (visuals[j].red_mask != red || visuals[j].alpha_mask != alpha)
 615             continue;
 616
 617          attr_list[1] = visuals[j].format;
 618
 619          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
 620                count + 1, EGL_WINDOW_BIT, attr_list, NULL);
 621          if (dri2_conf) {
 622             count++;
 623             format_count[j]++;
 624          }
 625       }
 626    }
 627
 628    for (i = 0; i < ARRAY_SIZE(format_count); i++) {
 629       if (!format_count[i]) {
 630          _eglLog(_EGL_DEBUG, "No DRI config supports native format 0x%x",
 631                  visuals[i].format);
 632       }
 633    }
 634
 635    return (count != 0);
 636 }
 637
 638 static struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
 639    .authenticate = dri2_drm_authenticate,
 640    .create_window_surface = dri2_drm_create_window_surface,
 641    .create_pixmap_surface = dri2_drm_create_pixmap_surface,
 642    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
 643    .destroy_surface = dri2_drm_destroy_surface,
 644    .create_image = dri2_drm_create_image_khr,
 645    .swap_interval = dri2_fallback_swap_interval,
 646    .swap_buffers = dri2_drm_swap_buffers,
 647    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 648    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 649    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 650    .copy_buffers = dri2_fallback_copy_buffers,
 651    .query_buffer_age = dri2_drm_query_buffer_age,
 652    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 653    .get_sync_values = dri2_fallback_get_sync_values,
 654    .get_dri_drawable = dri2_surface_get_dri_drawable,
 655 };
 656
 657 EGLBoolean
 658 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 659 {
 660    struct dri2_egl_display *dri2_dpy;
 661    struct gbm_device *gbm;
 662    const char *err;
 663    int fd = -1;
 664
 665    loader_set_logger(_eglLog);
 666
 667    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 668    if (!dri2_dpy)
 669       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 670
 671    disp->DriverData = (void *) dri2_dpy;
 672
 673    gbm = disp->PlatformDisplay;
 674    if (gbm == NULL) {
 675       char buf[64];
 676       int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
 677       if (n != -1 && n < sizeof(buf))
 678          fd = loader_open_device(buf);
 679       if (fd < 0)
 680          fd = loader_open_device("/dev/dri/card0");
 681       dri2_dpy->own_device = 1;
 682       gbm = gbm_create_device(fd);
 683       if (gbm == NULL) {
 684          err = "DRI2: failed to create gbm device";
 685          goto cleanup;
 686       }
 687    } else {
 688       fd = fcntl(gbm_device_get_fd(gbm), F_DUPFD_CLOEXEC, 3);
 689       if (fd < 0) {
 690          err = "DRI2: failed to fcntl() existing gbm device";
 691          goto cleanup;
 692       }
 693    }
 694
 695    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 696       err = "DRI2: gbm device using incorrect/incompatible backend";
 697       goto cleanup;
 698    }
 699
 700    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 701    if (dri2_dpy->gbm_dri->base.type != GBM_DRM_DRIVER_TYPE_DRI) {
 702       err = "DRI2: gbm device using incorrect/incompatible type";
 703       goto cleanup;
 704    }
 705
 706    dri2_dpy->fd = fd;
 707    dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->base.driver_name);
 708
 709    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 710    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 711    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 712    dri2_dpy->fence = dri2_dpy->gbm_dri->fence;
 713    dri2_dpy->image = dri2_dpy->gbm_dri->image;
 714    dri2_dpy->flush = dri2_dpy->gbm_dri->flush;
 715    dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
 716    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 717    dri2_dpy->interop = dri2_dpy->gbm_dri->interop;
 718
 719    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 720    dri2_dpy->gbm_dri->lookup_user_data = disp;
 721
 722    dri2_dpy->gbm_dri->get_buffers = dri2_drm_get_buffers;
 723    dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
 724    dri2_dpy->gbm_dri->get_buffers_with_format = dri2_drm_get_buffers_with_format;
 725    dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
 726    dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
 727    dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
 728
 729    dri2_dpy->gbm_dri->base.base.surface_lock_front_buffer = lock_front_buffer;
 730    dri2_dpy->gbm_dri->base.base.surface_release_buffer = release_buffer;
 731    dri2_dpy->gbm_dri->base.base.surface_has_free_buffers = has_free_buffers;
 732
 733    dri2_setup_screen(disp);
 734
 735    if (!drm_add_configs_for_visuals(drv, disp)) {
 736       err = "DRI2: failed to add configs";
 737       goto cleanup;
 738    }
 739
 740    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
 741    if (dri2_dpy->dri2)
 742       disp->Extensions.EXT_buffer_age = EGL_TRUE;
 743
 744 #ifdef HAVE_WAYLAND_PLATFORM
 745    dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 746 #endif
 747    dri2_set_WL_bind_wayland_display(drv, disp);
 748
 749    /* Fill vtbl last to prevent accidentally calling virtual function during
 750     * initialization.
 751     */
 752    dri2_dpy->vtbl = &dri2_drm_display_vtbl;
 753
 754    return EGL_TRUE;
 755
 756 cleanup:
 757    if (fd >= 0)
 758       close(fd);
 759
 760    free(dri2_dpy);
 761    disp->DriverData = NULL;
 762    return _eglError(EGL_NOT_INITIALIZED, err);
 763 }