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 = true;
  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
  72    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
  73       if (dri2_surf->color_buffers[i].bo == bo) {
  74          dri2_surf->color_buffers[i].locked = false;
  75          break;
  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
  86    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
  87       if (!dri2_surf->color_buffers[i].locked)
  88          return 1;
  89
  90    return 0;
  91 }
  92
  93 static _EGLSurface *
  94 dri2_drm_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
  95                                _EGLConfig *conf, void *native_surface,
  96                                const EGLint *attrib_list)
  97 {
  98    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
  99    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 100    struct dri2_egl_surface *dri2_surf;
 101    struct gbm_surface *surface = native_surface;
 102    struct gbm_dri_surface *surf;
 103    const __DRIconfig *config;
 104
 105    (void) drv;
 106
 107    dri2_surf = calloc(1, sizeof *dri2_surf);
 108    if (!dri2_surf) {
 109       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 110       return NULL;
 111    }
 112
 113    if (!_eglInitSurface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf, attrib_list))
 114       goto cleanup_surf;
 115
 116    surf = gbm_dri_surface(surface);
 117    dri2_surf->gbm_surf = surf;
 118    dri2_surf->base.Width =  surf->base.width;
 119    dri2_surf->base.Height = surf->base.height;
 120    surf->dri_private = dri2_surf;
 121
 122    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 123                                 dri2_surf->base.GLColorspace);
 124
 125    if (dri2_dpy->dri2) {
 126       dri2_surf->dri_drawable =
 127          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 128                                            dri2_surf->gbm_surf);
 129
 130    } else {
 131       assert(dri2_dpy->swrast != NULL);
 132
 133       dri2_surf->dri_drawable =
 134          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 135                                              dri2_surf->gbm_surf);
 136
 137    }
 138    if (dri2_surf->dri_drawable == NULL) {
 139       _eglError(EGL_BAD_ALLOC, "createNewDrawable()");
 140       goto cleanup_surf;
 141    }
 142
 143    return &dri2_surf->base;
 144
 145  cleanup_surf:
 146    free(dri2_surf);
 147
 148    return NULL;
 149 }
 150
 151 static _EGLSurface *
 152 dri2_drm_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 153                                _EGLConfig *conf, void *native_window,
 154                                const EGLint *attrib_list)
 155 {
 156    /* From the EGL_MESA_platform_gbm spec, version 5:
 157     *
 158     *  It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 159     *  that belongs to the GBM platform. Any such call fails and generates
 160     *  EGL_BAD_PARAMETER.
 161     */
 162    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on GBM");
 163    return NULL;
 164 }
 165
 166 static EGLBoolean
 167 dri2_drm_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 168 {
 169    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 170    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 171
 172    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 173
 174    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 175       if (dri2_surf->color_buffers[i].bo)
 176          gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
 177    }
 178
 179    for (unsigned i = 0; i < __DRI_BUFFER_COUNT; i++) {
 180       if (dri2_surf->dri_buffers[i])
 181          dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
 182                                        dri2_surf->dri_buffers[i]);
 183    }
 184
 185    free(surf);
 186
 187    return EGL_TRUE;
 188 }
 189
 190 static int
 191 get_back_bo(struct dri2_egl_surface *dri2_surf)
 192 {
 193    struct dri2_egl_display *dri2_dpy =
 194       dri2_egl_display(dri2_surf->base.Resource.Display);
 195    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 196    int age = 0;
 197
 198    if (dri2_surf->back == NULL) {
 199       for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 200          if (!dri2_surf->color_buffers[i].locked &&
 201               dri2_surf->color_buffers[i].age >= age) {
 202             dri2_surf->back = &dri2_surf->color_buffers[i];
 203             age = dri2_surf->color_buffers[i].age;
 204          }
 205       }
 206    }
 207
 208    if (dri2_surf->back == NULL)
 209       return -1;
 210    if (dri2_surf->back->bo == NULL) {
 211       if (surf->base.modifiers)
 212          dri2_surf->back->bo = gbm_bo_create_with_modifiers(&dri2_dpy->gbm_dri->base,
 213                                                             surf->base.width,
 214                                                             surf->base.height,
 215                                                             surf->base.format,
 216                                                             surf->base.modifiers,
 217                                                             surf->base.count);
 218       else
 219          dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 220                                              surf->base.width,
 221                                              surf->base.height,
 222                                              surf->base.format,
 223                                              surf->base.flags);
 224
 225    }
 226    if (dri2_surf->back->bo == NULL)
 227       return -1;
 228
 229    return 0;
 230 }
 231
 232 static int
 233 get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
 234 {
 235    struct dri2_egl_display *dri2_dpy =
 236       dri2_egl_display(dri2_surf->base.Resource.Display);
 237    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 238
 239    if (dri2_surf->current == NULL) {
 240       assert(!dri2_surf->color_buffers[0].locked);
 241       dri2_surf->current = &dri2_surf->color_buffers[0];
 242    }
 243
 244    if (dri2_surf->current->bo == NULL)
 245       dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 246                                              surf->base.width, surf->base.height,
 247                                              surf->base.format, surf->base.flags);
 248    if (dri2_surf->current->bo == NULL)
 249       return -1;
 250
 251    return 0;
 252 }
 253
 254 static void
 255 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 256 {
 257    struct dri2_egl_display *dri2_dpy =
 258       dri2_egl_display(dri2_surf->base.Resource.Display);
 259    struct gbm_dri_bo *bo;
 260    int name, pitch;
 261
 262    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 263
 264    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 265    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 266
 267    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 268    buffer->name = name;
 269    buffer->pitch = pitch;
 270    buffer->cpp = 4;
 271    buffer->flags = 0;
 272 }
 273
 274 static int
 275 get_aux_bo(struct dri2_egl_surface *dri2_surf,
 276            unsigned int attachment, unsigned int format, __DRIbuffer *buffer)
 277 {
 278    struct dri2_egl_display *dri2_dpy =
 279       dri2_egl_display(dri2_surf->base.Resource.Display);
 280    __DRIbuffer *b = dri2_surf->dri_buffers[attachment];
 281
 282    if (b == NULL) {
 283       b = dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen,
 284                                          attachment, format,
 285                                          dri2_surf->base.Width,
 286                                          dri2_surf->base.Height);
 287       dri2_surf->dri_buffers[attachment] = b;
 288    }
 289    if (b == NULL)
 290       return -1;
 291
 292    memcpy(buffer, b, sizeof *buffer);
 293
 294    return 0;
 295 }
 296
 297 static __DRIbuffer *
 298 dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
 299                              int *width, int *height,
 300                              unsigned int *attachments, int count,
 301                              int *out_count, void *loaderPrivate)
 302 {
 303    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 304    int i, j;
 305
 306    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 307       assert(attachments[i] < __DRI_BUFFER_COUNT);
 308       assert(j < ARRAY_SIZE(dri2_surf->buffers));
 309
 310       switch (attachments[i]) {
 311       case __DRI_BUFFER_BACK_LEFT:
 312          if (get_back_bo(dri2_surf) < 0) {
 313             _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 314             return NULL;
 315          }
 316          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 317          break;
 318       default:
 319          if (get_aux_bo(dri2_surf, attachments[i], attachments[i + 1],
 320                         &dri2_surf->buffers[j]) < 0) {
 321             _eglError(EGL_BAD_ALLOC, "failed to allocate aux buffer");
 322             return NULL;
 323          }
 324          break;
 325       }
 326    }
 327
 328    *out_count = j;
 329    if (j == 0)
 330       return NULL;
 331
 332    *width = dri2_surf->base.Width;
 333    *height = dri2_surf->base.Height;
 334
 335    return dri2_surf->buffers;
 336 }
 337
 338 static __DRIbuffer *
 339 dri2_drm_get_buffers(__DRIdrawable * driDrawable,
 340                      int *width, int *height,
 341                      unsigned int *attachments, int count,
 342                      int *out_count, void *loaderPrivate)
 343 {
 344    unsigned int *attachments_with_format;
 345    __DRIbuffer *buffer;
 346    const unsigned int format = 32;
 347
 348    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 349    if (!attachments_with_format) {
 350       *out_count = 0;
 351       return NULL;
 352    }
 353
 354    for (int i = 0; i < count; ++i) {
 355       attachments_with_format[2*i] = attachments[i];
 356       attachments_with_format[2*i + 1] = format;
 357    }
 358
 359    buffer =
 360       dri2_drm_get_buffers_with_format(driDrawable,
 361                                        width, height,
 362                                        attachments_with_format, count,
 363                                        out_count, loaderPrivate);
 364
 365    free(attachments_with_format);
 366
 367    return buffer;
 368 }
 369
 370 static int
 371 dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
 372                            unsigned int format,
 373                            uint32_t *stamp,
 374                            void *loaderPrivate,
 375                            uint32_t buffer_mask,
 376                            struct __DRIimageList *buffers)
 377 {
 378    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 379    struct gbm_dri_bo *bo;
 380
 381    if (get_back_bo(dri2_surf) < 0)
 382       return 0;
 383
 384    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 385    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 386    buffers->back = bo->image;
 387
 388    return 1;
 389 }
 390
 391 static void
 392 dri2_drm_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 393 {
 394    (void) driDrawable;
 395    (void) loaderPrivate;
 396 }
 397
 398 static EGLBoolean
 399 dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 400 {
 401    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 402    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 403
 404    if (!dri2_dpy->flush) {
 405       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 406       return EGL_TRUE;
 407    }
 408
 409    if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
 410       if (dri2_surf->current)
 411          _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 412       for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 413          if (dri2_surf->color_buffers[i].age > 0)
 414             dri2_surf->color_buffers[i].age++;
 415
 416       /* Make sure we have a back buffer in case we're swapping without
 417        * ever rendering. */
 418       if (get_back_bo(dri2_surf) < 0)
 419          return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 420
 421       dri2_surf->current = dri2_surf->back;
 422       dri2_surf->current->age = 1;
 423       dri2_surf->back = NULL;
 424    }
 425
 426    dri2_flush_drawable_for_swapbuffers(disp, draw);
 427    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 428
 429    return EGL_TRUE;
 430 }
 431
 432 static EGLint
 433 dri2_drm_query_buffer_age(_EGLDriver *drv,
 434                           _EGLDisplay *disp, _EGLSurface *surface)
 435 {
 436    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 437
 438    if (get_back_bo(dri2_surf) < 0) {
 439       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 440       return -1;
 441    }
 442
 443    return dri2_surf->back->age;
 444 }
 445
 446 static _EGLImage *
 447 dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 448                                  EGLClientBuffer buffer, const EGLint *attr_list)
 449 {
 450    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 451    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 452    struct dri2_egl_image *dri2_img;
 453
 454    dri2_img = malloc(sizeof *dri2_img);
 455    if (!dri2_img) {
 456       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 457       return NULL;
 458    }
 459
 460    _eglInitImage(&dri2_img->base, disp);
 461
 462    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 463    if (dri2_img->dri_image == NULL) {
 464       free(dri2_img);
 465       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 466       return NULL;
 467    }
 468
 469    return &dri2_img->base;
 470 }
 471
 472 static _EGLImage *
 473 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 474                           _EGLContext *ctx, EGLenum target,
 475                           EGLClientBuffer buffer, const EGLint *attr_list)
 476 {
 477    (void) drv;
 478
 479    switch (target) {
 480    case EGL_NATIVE_PIXMAP_KHR:
 481       return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 482    default:
 483       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 484    }
 485 }
 486
 487 static int
 488 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 489 {
 490    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 491
 492    return drmAuthMagic(dri2_dpy->fd, id);
 493 }
 494
 495 static void
 496 swrast_put_image2(__DRIdrawable *driDrawable,
 497                   int            op,
 498                   int            x,
 499                   int            y,
 500                   int            width,
 501                   int            height,
 502                   int            stride,
 503                   char          *data,
 504                   void          *loaderPrivate)
 505 {
 506    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 507    int internal_stride;
 508    struct gbm_dri_bo *bo;
 509    uint32_t bpp;
 510    int x_bytes, width_bytes;
 511    char *src, *dst;
 512
 513    if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
 514        op != __DRI_SWRAST_IMAGE_OP_SWAP)
 515       return;
 516
 517    if (get_swrast_front_bo(dri2_surf) < 0)
 518       return;
 519
 520    bo = gbm_dri_bo(dri2_surf->current->bo);
 521
 522    bpp = gbm_bo_get_bpp(&bo->base);
 523    if (bpp == 0)
 524       return;
 525
 526    x_bytes = x * (bpp >> 3);
 527    width_bytes = width * (bpp >> 3);
 528
 529    if (gbm_dri_bo_map_dumb(bo) == NULL)
 530       return;
 531
 532    internal_stride = bo->base.stride;
 533
 534    dst = bo->map + x_bytes + (y * internal_stride);
 535    src = data;
 536
 537    for (int i = 0; i < height; i++) {
 538       memcpy(dst, src, width_bytes);
 539       dst += internal_stride;
 540       src += stride;
 541    }
 542
 543    gbm_dri_bo_unmap_dumb(bo);
 544 }
 545
 546 static void
 547 swrast_get_image(__DRIdrawable *driDrawable,
 548                  int            x,
 549                  int            y,
 550                  int            width,
 551                  int            height,
 552                  char          *data,
 553                  void          *loaderPrivate)
 554 {
 555    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 556    int internal_stride, stride;
 557    struct gbm_dri_bo *bo;
 558    uint32_t bpp;
 559    int x_bytes, width_bytes;
 560    char *src, *dst;
 561
 562    if (get_swrast_front_bo(dri2_surf) < 0)
 563       return;
 564
 565    bo = gbm_dri_bo(dri2_surf->current->bo);
 566
 567    bpp = gbm_bo_get_bpp(&bo->base);
 568    if (bpp == 0)
 569       return;
 570
 571    x_bytes = x * (bpp >> 3);
 572    width_bytes = width * (bpp >> 3);
 573
 574    internal_stride = bo->base.stride;
 575    stride = width_bytes;
 576
 577    if (gbm_dri_bo_map_dumb(bo) == NULL)
 578       return;
 579
 580    dst = data;
 581    src = bo->map + x_bytes + (y * internal_stride);
 582
 583    for (int i = 0; i < height; i++) {
 584       memcpy(dst, src, width_bytes);
 585       dst += stride;
 586       src += internal_stride;
 587    }
 588
 589    gbm_dri_bo_unmap_dumb(bo);
 590 }
 591
 592 static EGLBoolean
 593 drm_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
 594 {
 595    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 596    static const struct {
 597       int format;
 598       unsigned int red_mask;
 599       unsigned int alpha_mask;
 600    } visuals[] = {
 601       { GBM_FORMAT_XRGB2101010, 0x3ff00000, 0x00000000 },
 602       { GBM_FORMAT_ARGB2101010, 0x3ff00000, 0xc0000000 },
 603       { GBM_FORMAT_XRGB8888,    0x00ff0000, 0x00000000 },
 604       { GBM_FORMAT_ARGB8888,    0x00ff0000, 0xff000000 },
 605       { GBM_FORMAT_RGB565,      0x0000f800, 0x00000000 },
 606    };
 607
 608    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
 609    unsigned int config_count = 0;
 610
 611    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
 612       unsigned int red, alpha;
 613
 614       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 615                                       __DRI_ATTRIB_RED_MASK, &red);
 616       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 617                                       __DRI_ATTRIB_ALPHA_MASK, &alpha);
 618
 619       for (unsigned j = 0; j < ARRAY_SIZE(visuals); j++) {
 620          struct dri2_egl_config *dri2_conf;
 621
 622          if (visuals[j].red_mask != red || visuals[j].alpha_mask != alpha)
 623             continue;
 624
 625          const EGLint attr_list[] = {
 626             EGL_NATIVE_VISUAL_ID,  visuals[j].format,
 627             EGL_NONE,
 628          };
 629
 630          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
 631                config_count + 1, EGL_WINDOW_BIT, attr_list, NULL);
 632          if (dri2_conf) {
 633             if (dri2_conf->base.ConfigID == config_count + 1)
 634                config_count++;
 635             format_count[j]++;
 636          }
 637       }
 638    }
 639
 640    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
 641       if (!format_count[i]) {
 642          _eglLog(_EGL_DEBUG, "No DRI config supports native format 0x%x",
 643                  visuals[i].format);
 644       }
 645    }
 646
 647    return (config_count != 0);
 648 }
 649
 650 static const struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
 651    .authenticate = dri2_drm_authenticate,
 652    .create_window_surface = dri2_drm_create_window_surface,
 653    .create_pixmap_surface = dri2_drm_create_pixmap_surface,
 654    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
 655    .destroy_surface = dri2_drm_destroy_surface,
 656    .create_image = dri2_drm_create_image_khr,
 657    .swap_interval = dri2_fallback_swap_interval,
 658    .swap_buffers = dri2_drm_swap_buffers,
 659    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 660    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 661    .set_damage_region = dri2_fallback_set_damage_region,
 662    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 663    .copy_buffers = dri2_fallback_copy_buffers,
 664    .query_buffer_age = dri2_drm_query_buffer_age,
 665    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 666    .get_sync_values = dri2_fallback_get_sync_values,
 667    .get_dri_drawable = dri2_surface_get_dri_drawable,
 668 };
 669
 670 EGLBoolean
 671 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 672 {
 673    struct dri2_egl_display *dri2_dpy;
 674    struct gbm_device *gbm;
 675    const char *err;
 676
 677    loader_set_logger(_eglLog);
 678
 679    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 680    if (!dri2_dpy)
 681       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 682
 683    dri2_dpy->fd = -1;
 684    disp->DriverData = (void *) dri2_dpy;
 685
 686    gbm = disp->PlatformDisplay;
 687    if (gbm == NULL) {
 688       char buf[64];
 689       int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
 690       if (n != -1 && n < sizeof(buf))
 691          dri2_dpy->fd = loader_open_device(buf);
 692       if (dri2_dpy->fd < 0)
 693          dri2_dpy->fd = loader_open_device("/dev/dri/card0");
 694       gbm = gbm_create_device(dri2_dpy->fd);
 695       if (gbm == NULL) {
 696          err = "DRI2: failed to create gbm device";
 697          goto cleanup;
 698       }
 699       dri2_dpy->own_device = true;
 700    } else {
 701       dri2_dpy->fd = fcntl(gbm_device_get_fd(gbm), F_DUPFD_CLOEXEC, 3);
 702       if (dri2_dpy->fd < 0) {
 703          err = "DRI2: failed to fcntl() existing gbm device";
 704          goto cleanup;
 705       }
 706    }
 707
 708    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 709       err = "DRI2: gbm device using incorrect/incompatible backend";
 710       goto cleanup;
 711    }
 712
 713    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 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 }