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 = gbm_dri_surface(_surf);
  47    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  48    struct gbm_dri_device *device = 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 = 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 = 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 bool
  94 dri2_drm_config_is_compatible(struct dri2_egl_display *dri2_dpy,
  95                               const __DRIconfig *config,
  96                               struct gbm_surface *surface)
  97 {
  98    const struct gbm_dri_visual *visual = NULL;
  99    int shifts[4];
 100    unsigned int sizes[4];
 101    int i;
 102
 103    /* Check that the EGLConfig being used to render to the surface is
 104     * compatible with the surface format. Since mixing ARGB and XRGB of
 105     * otherwise-compatible formats is relatively common, explicitly allow
 106     * this.
 107     */
 108    dri2_get_shifts_and_sizes(dri2_dpy->core, config, shifts, sizes);
 109
 110    for (i = 0; i < dri2_dpy->gbm_dri->num_visuals; i++) {
 111       visual = &dri2_dpy->gbm_dri->visual_table[i];
 112       if (visual->gbm_format == surface->format)
 113          break;
 114    }
 115
 116    if (i == dri2_dpy->gbm_dri->num_visuals)
 117       return false;
 118
 119    if (shifts[0] != visual->rgba_shifts.red ||
 120        shifts[1] != visual->rgba_shifts.green ||
 121        shifts[2] != visual->rgba_shifts.blue ||
 122        (shifts[3] > -1 && shifts[3] != visual->rgba_shifts.alpha) ||
 123        sizes[0] != visual->rgba_sizes.red ||
 124        sizes[1] != visual->rgba_sizes.green ||
 125        sizes[2] != visual->rgba_sizes.blue ||
 126        (sizes[3] > 0 && sizes[3] != visual->rgba_sizes.alpha)) {
 127       return false;
 128    }
 129
 130    return true;
 131 }
 132
 133 static _EGLSurface *
 134 dri2_drm_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 135                                _EGLConfig *conf, void *native_surface,
 136                                const EGLint *attrib_list)
 137 {
 138    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 139    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 140    struct dri2_egl_surface *dri2_surf;
 141    struct gbm_surface *surface = native_surface;
 142    struct gbm_dri_surface *surf;
 143    const __DRIconfig *config;
 144
 145    (void) drv;
 146
 147    dri2_surf = calloc(1, sizeof *dri2_surf);
 148    if (!dri2_surf) {
 149       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 150       return NULL;
 151    }
 152
 153    if (!dri2_init_surface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf,
 154                           attrib_list, false, native_surface))
 155       goto cleanup_surf;
 156
 157    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 158                                 dri2_surf->base.GLColorspace);
 159
 160    if (!config) {
 161       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 162       goto cleanup_surf;
 163    }
 164
 165    if (!dri2_drm_config_is_compatible(dri2_dpy, config, surface)) {
 166       _eglError(EGL_BAD_MATCH, "EGL config not compatible with GBM format");
 167       goto cleanup_surf;
 168    }
 169
 170    surf = gbm_dri_surface(surface);
 171    dri2_surf->gbm_surf = surf;
 172    dri2_surf->base.Width =  surf->base.width;
 173    dri2_surf->base.Height = surf->base.height;
 174    surf->dri_private = dri2_surf;
 175
 176    if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf->gbm_surf))
 177       goto cleanup_surf;
 178
 179    return &dri2_surf->base;
 180
 181  cleanup_surf:
 182    free(dri2_surf);
 183
 184    return NULL;
 185 }
 186
 187 static _EGLSurface *
 188 dri2_drm_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 189                                _EGLConfig *conf, void *native_window,
 190                                const EGLint *attrib_list)
 191 {
 192    /* From the EGL_MESA_platform_gbm spec, version 5:
 193     *
 194     *  It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 195     *  that belongs to the GBM platform. Any such call fails and generates
 196     *  EGL_BAD_PARAMETER.
 197     */
 198    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on GBM");
 199    return NULL;
 200 }
 201
 202 static EGLBoolean
 203 dri2_drm_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 204 {
 205    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 206    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 207
 208    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 209
 210    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 211       if (dri2_surf->color_buffers[i].bo)
 212          gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
 213    }
 214
 215    dri2_egl_surface_free_local_buffers(dri2_surf);
 216
 217    dri2_fini_surface(surf);
 218    free(surf);
 219
 220    return EGL_TRUE;
 221 }
 222
 223 static int
 224 get_back_bo(struct dri2_egl_surface *dri2_surf)
 225 {
 226    struct dri2_egl_display *dri2_dpy =
 227       dri2_egl_display(dri2_surf->base.Resource.Display);
 228    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 229    int age = 0;
 230
 231    if (dri2_surf->back == NULL) {
 232       for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 233          if (!dri2_surf->color_buffers[i].locked &&
 234               dri2_surf->color_buffers[i].age >= age) {
 235             dri2_surf->back = &dri2_surf->color_buffers[i];
 236             age = dri2_surf->color_buffers[i].age;
 237          }
 238       }
 239    }
 240
 241    if (dri2_surf->back == NULL)
 242       return -1;
 243    if (dri2_surf->back->bo == NULL) {
 244       if (surf->base.modifiers)
 245          dri2_surf->back->bo = gbm_bo_create_with_modifiers(&dri2_dpy->gbm_dri->base,
 246                                                             surf->base.width,
 247                                                             surf->base.height,
 248                                                             surf->base.format,
 249                                                             surf->base.modifiers,
 250                                                             surf->base.count);
 251       else
 252          dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 253                                              surf->base.width,
 254                                              surf->base.height,
 255                                              surf->base.format,
 256                                              surf->base.flags);
 257
 258    }
 259    if (dri2_surf->back->bo == NULL)
 260       return -1;
 261
 262    return 0;
 263 }
 264
 265 static int
 266 get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
 267 {
 268    struct dri2_egl_display *dri2_dpy =
 269       dri2_egl_display(dri2_surf->base.Resource.Display);
 270    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 271
 272    if (dri2_surf->current == NULL) {
 273       assert(!dri2_surf->color_buffers[0].locked);
 274       dri2_surf->current = &dri2_surf->color_buffers[0];
 275    }
 276
 277    if (dri2_surf->current->bo == NULL)
 278       dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 279                                              surf->base.width, surf->base.height,
 280                                              surf->base.format, surf->base.flags);
 281    if (dri2_surf->current->bo == NULL)
 282       return -1;
 283
 284    return 0;
 285 }
 286
 287 static void
 288 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 289 {
 290    struct dri2_egl_display *dri2_dpy =
 291       dri2_egl_display(dri2_surf->base.Resource.Display);
 292    struct gbm_dri_bo *bo;
 293    int name, pitch;
 294
 295    bo = gbm_dri_bo(dri2_surf->back->bo);
 296
 297    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 298    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 299
 300    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 301    buffer->name = name;
 302    buffer->pitch = pitch;
 303    buffer->cpp = 4;
 304    buffer->flags = 0;
 305 }
 306
 307 static __DRIbuffer *
 308 dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
 309                                  int *width, int *height,
 310                                  unsigned int *attachments, int count,
 311                                  int *out_count, void *loaderPrivate)
 312 {
 313    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 314    int i, j;
 315
 316    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 317       __DRIbuffer *local;
 318
 319       assert(attachments[i] < __DRI_BUFFER_COUNT);
 320       assert(j < ARRAY_SIZE(dri2_surf->buffers));
 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          local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
 332                                                      attachments[i + 1]);
 333
 334          if (!local) {
 335             _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
 336             return NULL;
 337          }
 338          dri2_surf->buffers[j] = *local;
 339          break;
 340       }
 341    }
 342
 343    *out_count = j;
 344    if (j == 0)
 345       return NULL;
 346
 347    *width = dri2_surf->base.Width;
 348    *height = dri2_surf->base.Height;
 349
 350    return dri2_surf->buffers;
 351 }
 352
 353 static __DRIbuffer *
 354 dri2_drm_get_buffers(__DRIdrawable * driDrawable,
 355                      int *width, int *height,
 356                      unsigned int *attachments, int count,
 357                      int *out_count, void *loaderPrivate)
 358 {
 359    unsigned int *attachments_with_format;
 360    __DRIbuffer *buffer;
 361    const unsigned int format = 32;
 362
 363    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 364    if (!attachments_with_format) {
 365       *out_count = 0;
 366       return NULL;
 367    }
 368
 369    for (int i = 0; i < count; ++i) {
 370       attachments_with_format[2*i] = attachments[i];
 371       attachments_with_format[2*i + 1] = format;
 372    }
 373
 374    buffer =
 375       dri2_drm_get_buffers_with_format(driDrawable,
 376                                        width, height,
 377                                        attachments_with_format, count,
 378                                        out_count, loaderPrivate);
 379
 380    free(attachments_with_format);
 381
 382    return buffer;
 383 }
 384
 385 static int
 386 dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
 387                            unsigned int format,
 388                            uint32_t *stamp,
 389                            void *loaderPrivate,
 390                            uint32_t buffer_mask,
 391                            struct __DRIimageList *buffers)
 392 {
 393    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 394    struct gbm_dri_bo *bo;
 395
 396    if (get_back_bo(dri2_surf) < 0)
 397       return 0;
 398
 399    bo = gbm_dri_bo(dri2_surf->back->bo);
 400    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 401    buffers->back = bo->image;
 402
 403    return 1;
 404 }
 405
 406 static void
 407 dri2_drm_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 408 {
 409    (void) driDrawable;
 410    (void) loaderPrivate;
 411 }
 412
 413 static EGLBoolean
 414 dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 415 {
 416    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 417    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 418
 419    if (!dri2_dpy->flush) {
 420       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 421       return EGL_TRUE;
 422    }
 423
 424    if (dri2_surf->current)
 425       _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 426    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 427       if (dri2_surf->color_buffers[i].age > 0)
 428          dri2_surf->color_buffers[i].age++;
 429
 430    /* Make sure we have a back buffer in case we're swapping without
 431     * ever rendering. */
 432    if (get_back_bo(dri2_surf) < 0)
 433       return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 434
 435    dri2_surf->current = dri2_surf->back;
 436    dri2_surf->current->age = 1;
 437    dri2_surf->back = NULL;
 438
 439    dri2_flush_drawable_for_swapbuffers(disp, draw);
 440    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 441
 442    return EGL_TRUE;
 443 }
 444
 445 static EGLint
 446 dri2_drm_query_buffer_age(_EGLDriver *drv,
 447                           _EGLDisplay *disp, _EGLSurface *surface)
 448 {
 449    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 450
 451    if (get_back_bo(dri2_surf) < 0) {
 452       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 453       return -1;
 454    }
 455
 456    return dri2_surf->back->age;
 457 }
 458
 459 static _EGLImage *
 460 dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 461                                  EGLClientBuffer buffer, const EGLint *attr_list)
 462 {
 463    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 464    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 465    struct dri2_egl_image *dri2_img;
 466
 467    dri2_img = malloc(sizeof *dri2_img);
 468    if (!dri2_img) {
 469       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 470       return NULL;
 471    }
 472
 473    _eglInitImage(&dri2_img->base, disp);
 474
 475    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 476    if (dri2_img->dri_image == NULL) {
 477       free(dri2_img);
 478       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 479       return NULL;
 480    }
 481
 482    return &dri2_img->base;
 483 }
 484
 485 static _EGLImage *
 486 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 487                           _EGLContext *ctx, EGLenum target,
 488                           EGLClientBuffer buffer, const EGLint *attr_list)
 489 {
 490    (void) drv;
 491
 492    switch (target) {
 493    case EGL_NATIVE_PIXMAP_KHR:
 494       return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 495    default:
 496       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 497    }
 498 }
 499
 500 static int
 501 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 502 {
 503    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 504
 505    return drmAuthMagic(dri2_dpy->fd, id);
 506 }
 507
 508 static void
 509 swrast_put_image2(__DRIdrawable *driDrawable,
 510                   int            op,
 511                   int            x,
 512                   int            y,
 513                   int            width,
 514                   int            height,
 515                   int            stride,
 516                   char          *data,
 517                   void          *loaderPrivate)
 518 {
 519    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 520    int internal_stride;
 521    struct gbm_dri_bo *bo;
 522    uint32_t bpp;
 523    int x_bytes, width_bytes;
 524    char *src, *dst;
 525
 526    if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
 527        op != __DRI_SWRAST_IMAGE_OP_SWAP)
 528       return;
 529
 530    if (get_swrast_front_bo(dri2_surf) < 0)
 531       return;
 532
 533    bo = gbm_dri_bo(dri2_surf->current->bo);
 534
 535    bpp = gbm_bo_get_bpp(&bo->base);
 536    if (bpp == 0)
 537       return;
 538
 539    x_bytes = x * (bpp >> 3);
 540    width_bytes = width * (bpp >> 3);
 541
 542    if (gbm_dri_bo_map_dumb(bo) == NULL)
 543       return;
 544
 545    internal_stride = bo->base.stride;
 546
 547    dst = bo->map + x_bytes + (y * internal_stride);
 548    src = data;
 549
 550    for (int i = 0; i < height; i++) {
 551       memcpy(dst, src, width_bytes);
 552       dst += internal_stride;
 553       src += stride;
 554    }
 555
 556    gbm_dri_bo_unmap_dumb(bo);
 557 }
 558
 559 static void
 560 swrast_get_image(__DRIdrawable *driDrawable,
 561                  int            x,
 562                  int            y,
 563                  int            width,
 564                  int            height,
 565                  char          *data,
 566                  void          *loaderPrivate)
 567 {
 568    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 569    int internal_stride, stride;
 570    struct gbm_dri_bo *bo;
 571    uint32_t bpp;
 572    int x_bytes, width_bytes;
 573    char *src, *dst;
 574
 575    if (get_swrast_front_bo(dri2_surf) < 0)
 576       return;
 577
 578    bo = gbm_dri_bo(dri2_surf->current->bo);
 579
 580    bpp = gbm_bo_get_bpp(&bo->base);
 581    if (bpp == 0)
 582       return;
 583
 584    x_bytes = x * (bpp >> 3);
 585    width_bytes = width * (bpp >> 3);
 586
 587    internal_stride = bo->base.stride;
 588    stride = width_bytes;
 589
 590    if (gbm_dri_bo_map_dumb(bo) == NULL)
 591       return;
 592
 593    dst = data;
 594    src = bo->map + x_bytes + (y * internal_stride);
 595
 596    for (int i = 0; i < height; i++) {
 597       memcpy(dst, src, width_bytes);
 598       dst += stride;
 599       src += internal_stride;
 600    }
 601
 602    gbm_dri_bo_unmap_dumb(bo);
 603 }
 604
 605 static EGLBoolean
 606 drm_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
 607 {
 608    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 609    const struct gbm_dri_visual *visuals = dri2_dpy->gbm_dri->visual_table;
 610    int num_visuals = dri2_dpy->gbm_dri->num_visuals;
 611    unsigned int format_count[num_visuals];
 612    unsigned int config_count = 0;
 613
 614    memset(format_count, 0, num_visuals * sizeof(unsigned int));
 615
 616    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
 617       const __DRIconfig *config = dri2_dpy->driver_configs[i];
 618       int shifts[4];
 619       unsigned int sizes[4];
 620
 621       dri2_get_shifts_and_sizes(dri2_dpy->core, config, shifts, sizes);
 622
 623       for (unsigned j = 0; j < num_visuals; j++) {
 624          struct dri2_egl_config *dri2_conf;
 625
 626          if (visuals[j].rgba_shifts.red != shifts[0] ||
 627              visuals[j].rgba_shifts.green != shifts[1] ||
 628              visuals[j].rgba_shifts.blue != shifts[2] ||
 629              visuals[j].rgba_shifts.alpha != shifts[3] ||
 630              visuals[j].rgba_sizes.red != sizes[0] ||
 631              visuals[j].rgba_sizes.green != sizes[1] ||
 632              visuals[j].rgba_sizes.blue != sizes[2] ||
 633              visuals[j].rgba_sizes.alpha != sizes[3])
 634             continue;
 635
 636          const EGLint attr_list[] = {
 637             EGL_NATIVE_VISUAL_ID, visuals[j].gbm_format,
 638             EGL_NONE,
 639          };
 640
 641          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
 642                config_count + 1, EGL_WINDOW_BIT, attr_list, NULL, NULL);
 643          if (dri2_conf) {
 644             if (dri2_conf->base.ConfigID == config_count + 1)
 645                config_count++;
 646             format_count[j]++;
 647          }
 648       }
 649    }
 650
 651    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
 652       if (!format_count[i]) {
 653          struct gbm_format_name_desc desc;
 654          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
 655                  gbm_format_get_name(visuals[i].gbm_format, &desc));
 656       }
 657    }
 658
 659    return (config_count != 0);
 660 }
 661
 662 static const struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
 663    .authenticate = dri2_drm_authenticate,
 664    .create_window_surface = dri2_drm_create_window_surface,
 665    .create_pixmap_surface = dri2_drm_create_pixmap_surface,
 666    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
 667    .destroy_surface = dri2_drm_destroy_surface,
 668    .create_image = dri2_drm_create_image_khr,
 669    .swap_buffers = dri2_drm_swap_buffers,
 670    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 671    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 672    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 673    .copy_buffers = dri2_fallback_copy_buffers,
 674    .query_buffer_age = dri2_drm_query_buffer_age,
 675    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 676    .get_sync_values = dri2_fallback_get_sync_values,
 677    .get_dri_drawable = dri2_surface_get_dri_drawable,
 678 };
 679
 680 EGLBoolean
 681 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 682 {
 683    _EGLDevice *dev;
 684    struct dri2_egl_display *dri2_dpy;
 685    struct gbm_device *gbm;
 686    const char *err;
 687
 688    /* Not supported yet */
 689    if (disp->Options.ForceSoftware)
 690       return EGL_FALSE;
 691
 692    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 693    if (!dri2_dpy)
 694       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 695
 696    dri2_dpy->fd = -1;
 697    disp->DriverData = (void *) dri2_dpy;
 698
 699    gbm = disp->PlatformDisplay;
 700    if (gbm == NULL) {
 701       char buf[64];
 702       int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
 703       if (n != -1 && n < sizeof(buf))
 704          dri2_dpy->fd = loader_open_device(buf);
 705       gbm = gbm_create_device(dri2_dpy->fd);
 706       if (gbm == NULL) {
 707          err = "DRI2: failed to create gbm device";
 708          goto cleanup;
 709       }
 710       dri2_dpy->own_device = true;
 711    } else {
 712       dri2_dpy->fd = fcntl(gbm_device_get_fd(gbm), F_DUPFD_CLOEXEC, 3);
 713       if (dri2_dpy->fd < 0) {
 714          err = "DRI2: failed to fcntl() existing gbm device";
 715          goto cleanup;
 716       }
 717    }
 718    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 719
 720    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 721       err = "DRI2: gbm device using incorrect/incompatible backend";
 722       goto cleanup;
 723    }
 724
 725    dev = _eglAddDevice(dri2_dpy->fd, false);
 726    if (!dev) {
 727       err = "DRI2: failed to find EGLDevice";
 728       goto cleanup;
 729    }
 730
 731    disp->Device = dev;
 732
 733    dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->driver_name);
 734
 735    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 736    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 737    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 738    dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
 739    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 740
 741    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 742    dri2_dpy->gbm_dri->lookup_user_data = disp;
 743
 744    dri2_dpy->gbm_dri->get_buffers = dri2_drm_get_buffers;
 745    dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
 746    dri2_dpy->gbm_dri->get_buffers_with_format = dri2_drm_get_buffers_with_format;
 747    dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
 748    dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
 749    dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
 750
 751    dri2_dpy->gbm_dri->base.surface_lock_front_buffer = lock_front_buffer;
 752    dri2_dpy->gbm_dri->base.surface_release_buffer = release_buffer;
 753    dri2_dpy->gbm_dri->base.surface_has_free_buffers = has_free_buffers;
 754
 755    if (!dri2_setup_extensions(disp)) {
 756       err = "DRI2: failed to find required DRI extensions";
 757       goto cleanup;
 758    }
 759
 760    dri2_setup_screen(disp);
 761
 762    if (!drm_add_configs_for_visuals(drv, disp)) {
 763       err = "DRI2: failed to add configs";
 764       goto cleanup;
 765    }
 766
 767    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
 768    if (dri2_dpy->dri2)
 769       disp->Extensions.EXT_buffer_age = EGL_TRUE;
 770
 771 #ifdef HAVE_WAYLAND_PLATFORM
 772    dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 773 #endif
 774    dri2_set_WL_bind_wayland_display(drv, disp);
 775
 776    /* Fill vtbl last to prevent accidentally calling virtual function during
 777     * initialization.
 778     */
 779    dri2_dpy->vtbl = &dri2_drm_display_vtbl;
 780
 781    return EGL_TRUE;
 782
 783 cleanup:
 784    dri2_display_destroy(disp);
 785    return _eglError(EGL_NOT_INITIALIZED, err);
 786 }
 787
 788 void
 789 dri2_teardown_drm(struct dri2_egl_display *dri2_dpy)
 790 {
 791    if (dri2_dpy->own_device)
 792       gbm_device_destroy(&dri2_dpy->gbm_dri->base);
 793 }