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 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    unsigned int red, green, blue, alpha;
 100    int i;
 101
 102    /* Check that the EGLConfig being used to render to the surface is
 103     * compatible with the surface format. Since mixing ARGB and XRGB of
 104     * otherwise-compatible formats is relatively common, explicitly allow
 105     * this.
 106     */
 107    dri2_dpy->core->getConfigAttrib(config, __DRI_ATTRIB_RED_MASK, &red);
 108    dri2_dpy->core->getConfigAttrib(config, __DRI_ATTRIB_GREEN_MASK, &green);
 109    dri2_dpy->core->getConfigAttrib(config, __DRI_ATTRIB_BLUE_MASK, &blue);
 110    dri2_dpy->core->getConfigAttrib(config, __DRI_ATTRIB_ALPHA_MASK, &alpha);
 111
 112    for (i = 0; i < dri2_dpy->gbm_dri->num_visuals; i++) {
 113       visual = &dri2_dpy->gbm_dri->visual_table[i];
 114       if (visual->gbm_format == surface->format)
 115          break;
 116    }
 117
 118    if (i == dri2_dpy->gbm_dri->num_visuals)
 119       return false;
 120
 121    if (red != visual->rgba_masks[0] ||
 122        green != visual->rgba_masks[1] ||
 123        blue != visual->rgba_masks[2] ||
 124        (alpha && visual->rgba_masks[3] && alpha != visual->rgba_masks[3])) {
 125       return false;
 126    }
 127
 128    return true;
 129 }
 130
 131 static _EGLSurface *
 132 dri2_drm_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 133                                _EGLConfig *conf, void *native_surface,
 134                                const EGLint *attrib_list)
 135 {
 136    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 137    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 138    struct dri2_egl_surface *dri2_surf;
 139    struct gbm_surface *surface = native_surface;
 140    struct gbm_dri_surface *surf;
 141    const __DRIconfig *config;
 142
 143    (void) drv;
 144
 145    dri2_surf = calloc(1, sizeof *dri2_surf);
 146    if (!dri2_surf) {
 147       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 148       return NULL;
 149    }
 150
 151    if (!dri2_init_surface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf,
 152                           attrib_list, false))
 153       goto cleanup_surf;
 154
 155    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 156                                 dri2_surf->base.GLColorspace);
 157
 158    if (!dri2_drm_config_is_compatible(dri2_dpy, config, surface)) {
 159       _eglError(EGL_BAD_MATCH, "EGL config not compatible with GBM format");
 160       goto cleanup_surf;
 161    }
 162
 163    surf = gbm_dri_surface(surface);
 164    dri2_surf->gbm_surf = surf;
 165    dri2_surf->base.Width =  surf->base.width;
 166    dri2_surf->base.Height = surf->base.height;
 167    surf->dri_private = dri2_surf;
 168
 169    if (dri2_dpy->dri2) {
 170       dri2_surf->dri_drawable =
 171          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 172                                            dri2_surf->gbm_surf);
 173
 174    } else {
 175       assert(dri2_dpy->swrast != NULL);
 176
 177       dri2_surf->dri_drawable =
 178          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 179                                              dri2_surf->gbm_surf);
 180
 181    }
 182    if (dri2_surf->dri_drawable == NULL) {
 183       _eglError(EGL_BAD_ALLOC, "createNewDrawable()");
 184       goto cleanup_surf;
 185    }
 186
 187    return &dri2_surf->base;
 188
 189  cleanup_surf:
 190    free(dri2_surf);
 191
 192    return NULL;
 193 }
 194
 195 static _EGLSurface *
 196 dri2_drm_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 197                                _EGLConfig *conf, void *native_window,
 198                                const EGLint *attrib_list)
 199 {
 200    /* From the EGL_MESA_platform_gbm spec, version 5:
 201     *
 202     *  It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 203     *  that belongs to the GBM platform. Any such call fails and generates
 204     *  EGL_BAD_PARAMETER.
 205     */
 206    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on GBM");
 207    return NULL;
 208 }
 209
 210 static EGLBoolean
 211 dri2_drm_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 212 {
 213    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 214    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 215
 216    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 217
 218    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 219       if (dri2_surf->color_buffers[i].bo)
 220          gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
 221    }
 222
 223    dri2_egl_surface_free_local_buffers(dri2_surf);
 224
 225    dri2_fini_surface(surf);
 226    free(surf);
 227
 228    return EGL_TRUE;
 229 }
 230
 231 static int
 232 get_back_bo(struct dri2_egl_surface *dri2_surf)
 233 {
 234    struct dri2_egl_display *dri2_dpy =
 235       dri2_egl_display(dri2_surf->base.Resource.Display);
 236    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 237    int age = 0;
 238
 239    if (dri2_surf->back == NULL) {
 240       for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 241          if (!dri2_surf->color_buffers[i].locked &&
 242               dri2_surf->color_buffers[i].age >= age) {
 243             dri2_surf->back = &dri2_surf->color_buffers[i];
 244             age = dri2_surf->color_buffers[i].age;
 245          }
 246       }
 247    }
 248
 249    if (dri2_surf->back == NULL)
 250       return -1;
 251    if (dri2_surf->back->bo == NULL) {
 252       if (surf->base.modifiers)
 253          dri2_surf->back->bo = gbm_bo_create_with_modifiers(&dri2_dpy->gbm_dri->base,
 254                                                             surf->base.width,
 255                                                             surf->base.height,
 256                                                             surf->base.format,
 257                                                             surf->base.modifiers,
 258                                                             surf->base.count);
 259       else
 260          dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 261                                              surf->base.width,
 262                                              surf->base.height,
 263                                              surf->base.format,
 264                                              surf->base.flags);
 265
 266    }
 267    if (dri2_surf->back->bo == NULL)
 268       return -1;
 269
 270    return 0;
 271 }
 272
 273 static int
 274 get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
 275 {
 276    struct dri2_egl_display *dri2_dpy =
 277       dri2_egl_display(dri2_surf->base.Resource.Display);
 278    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 279
 280    if (dri2_surf->current == NULL) {
 281       assert(!dri2_surf->color_buffers[0].locked);
 282       dri2_surf->current = &dri2_surf->color_buffers[0];
 283    }
 284
 285    if (dri2_surf->current->bo == NULL)
 286       dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 287                                              surf->base.width, surf->base.height,
 288                                              surf->base.format, surf->base.flags);
 289    if (dri2_surf->current->bo == NULL)
 290       return -1;
 291
 292    return 0;
 293 }
 294
 295 static void
 296 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 297 {
 298    struct dri2_egl_display *dri2_dpy =
 299       dri2_egl_display(dri2_surf->base.Resource.Display);
 300    struct gbm_dri_bo *bo;
 301    int name, pitch;
 302
 303    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 304
 305    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 306    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 307
 308    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 309    buffer->name = name;
 310    buffer->pitch = pitch;
 311    buffer->cpp = 4;
 312    buffer->flags = 0;
 313 }
 314
 315 static __DRIbuffer *
 316 dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
 317                                  int *width, int *height,
 318                                  unsigned int *attachments, int count,
 319                                  int *out_count, void *loaderPrivate)
 320 {
 321    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 322    int i, j;
 323
 324    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 325       __DRIbuffer *local;
 326
 327       assert(attachments[i] < __DRI_BUFFER_COUNT);
 328       assert(j < ARRAY_SIZE(dri2_surf->buffers));
 329
 330       switch (attachments[i]) {
 331       case __DRI_BUFFER_BACK_LEFT:
 332          if (get_back_bo(dri2_surf) < 0) {
 333             _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 334             return NULL;
 335          }
 336          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 337          break;
 338       default:
 339          local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
 340                                                      attachments[i + 1]);
 341
 342          if (!local) {
 343             _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
 344             return NULL;
 345          }
 346          dri2_surf->buffers[j] = *local;
 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
 371    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 372    if (!attachments_with_format) {
 373       *out_count = 0;
 374       return NULL;
 375    }
 376
 377    for (int i = 0; i < count; ++i) {
 378       attachments_with_format[2*i] = attachments[i];
 379       attachments_with_format[2*i + 1] = format;
 380    }
 381
 382    buffer =
 383       dri2_drm_get_buffers_with_format(driDrawable,
 384                                        width, height,
 385                                        attachments_with_format, count,
 386                                        out_count, loaderPrivate);
 387
 388    free(attachments_with_format);
 389
 390    return buffer;
 391 }
 392
 393 static int
 394 dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
 395                            unsigned int format,
 396                            uint32_t *stamp,
 397                            void *loaderPrivate,
 398                            uint32_t buffer_mask,
 399                            struct __DRIimageList *buffers)
 400 {
 401    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 402    struct gbm_dri_bo *bo;
 403
 404    if (get_back_bo(dri2_surf) < 0)
 405       return 0;
 406
 407    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 408    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 409    buffers->back = bo->image;
 410
 411    return 1;
 412 }
 413
 414 static void
 415 dri2_drm_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 416 {
 417    (void) driDrawable;
 418    (void) loaderPrivate;
 419 }
 420
 421 static EGLBoolean
 422 dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 423 {
 424    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 425    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 426
 427    if (!dri2_dpy->flush) {
 428       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 429       return EGL_TRUE;
 430    }
 431
 432    if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
 433       if (dri2_surf->current)
 434          _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 435       for (unsigned 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          return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 443
 444       dri2_surf->current = dri2_surf->back;
 445       dri2_surf->current->age = 1;
 446       dri2_surf->back = NULL;
 447    }
 448
 449    dri2_flush_drawable_for_swapbuffers(disp, draw);
 450    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 451
 452    return EGL_TRUE;
 453 }
 454
 455 static EGLint
 456 dri2_drm_query_buffer_age(_EGLDriver *drv,
 457                           _EGLDisplay *disp, _EGLSurface *surface)
 458 {
 459    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 460
 461    if (get_back_bo(dri2_surf) < 0) {
 462       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 463       return -1;
 464    }
 465
 466    return dri2_surf->back->age;
 467 }
 468
 469 static _EGLImage *
 470 dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 471                                  EGLClientBuffer buffer, const EGLint *attr_list)
 472 {
 473    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 474    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 475    struct dri2_egl_image *dri2_img;
 476
 477    dri2_img = malloc(sizeof *dri2_img);
 478    if (!dri2_img) {
 479       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 480       return NULL;
 481    }
 482
 483    _eglInitImage(&dri2_img->base, disp);
 484
 485    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 486    if (dri2_img->dri_image == NULL) {
 487       free(dri2_img);
 488       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 489       return NULL;
 490    }
 491
 492    return &dri2_img->base;
 493 }
 494
 495 static _EGLImage *
 496 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 497                           _EGLContext *ctx, EGLenum target,
 498                           EGLClientBuffer buffer, const EGLint *attr_list)
 499 {
 500    (void) drv;
 501
 502    switch (target) {
 503    case EGL_NATIVE_PIXMAP_KHR:
 504       return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 505    default:
 506       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 507    }
 508 }
 509
 510 static int
 511 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 512 {
 513    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 514
 515    return drmAuthMagic(dri2_dpy->fd, id);
 516 }
 517
 518 static void
 519 swrast_put_image2(__DRIdrawable *driDrawable,
 520                   int            op,
 521                   int            x,
 522                   int            y,
 523                   int            width,
 524                   int            height,
 525                   int            stride,
 526                   char          *data,
 527                   void          *loaderPrivate)
 528 {
 529    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 530    int internal_stride;
 531    struct gbm_dri_bo *bo;
 532    uint32_t bpp;
 533    int x_bytes, width_bytes;
 534    char *src, *dst;
 535
 536    if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
 537        op != __DRI_SWRAST_IMAGE_OP_SWAP)
 538       return;
 539
 540    if (get_swrast_front_bo(dri2_surf) < 0)
 541       return;
 542
 543    bo = gbm_dri_bo(dri2_surf->current->bo);
 544
 545    bpp = gbm_bo_get_bpp(&bo->base);
 546    if (bpp == 0)
 547       return;
 548
 549    x_bytes = x * (bpp >> 3);
 550    width_bytes = width * (bpp >> 3);
 551
 552    if (gbm_dri_bo_map_dumb(bo) == NULL)
 553       return;
 554
 555    internal_stride = bo->base.stride;
 556
 557    dst = bo->map + x_bytes + (y * internal_stride);
 558    src = data;
 559
 560    for (int i = 0; i < height; i++) {
 561       memcpy(dst, src, width_bytes);
 562       dst += internal_stride;
 563       src += stride;
 564    }
 565
 566    gbm_dri_bo_unmap_dumb(bo);
 567 }
 568
 569 static void
 570 swrast_get_image(__DRIdrawable *driDrawable,
 571                  int            x,
 572                  int            y,
 573                  int            width,
 574                  int            height,
 575                  char          *data,
 576                  void          *loaderPrivate)
 577 {
 578    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 579    int internal_stride, stride;
 580    struct gbm_dri_bo *bo;
 581    uint32_t bpp;
 582    int x_bytes, width_bytes;
 583    char *src, *dst;
 584
 585    if (get_swrast_front_bo(dri2_surf) < 0)
 586       return;
 587
 588    bo = gbm_dri_bo(dri2_surf->current->bo);
 589
 590    bpp = gbm_bo_get_bpp(&bo->base);
 591    if (bpp == 0)
 592       return;
 593
 594    x_bytes = x * (bpp >> 3);
 595    width_bytes = width * (bpp >> 3);
 596
 597    internal_stride = bo->base.stride;
 598    stride = width_bytes;
 599
 600    if (gbm_dri_bo_map_dumb(bo) == NULL)
 601       return;
 602
 603    dst = data;
 604    src = bo->map + x_bytes + (y * internal_stride);
 605
 606    for (int i = 0; i < height; i++) {
 607       memcpy(dst, src, width_bytes);
 608       dst += stride;
 609       src += internal_stride;
 610    }
 611
 612    gbm_dri_bo_unmap_dumb(bo);
 613 }
 614
 615 static EGLBoolean
 616 drm_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
 617 {
 618    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 619    const struct gbm_dri_visual *visuals = dri2_dpy->gbm_dri->visual_table;
 620    int num_visuals = dri2_dpy->gbm_dri->num_visuals;
 621    unsigned int format_count[num_visuals];
 622    unsigned int config_count = 0;
 623
 624    memset(format_count, 0, num_visuals * sizeof(unsigned int));
 625
 626    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
 627       unsigned int red, green, blue, alpha;
 628
 629       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 630                                       __DRI_ATTRIB_RED_MASK, &red);
 631       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 632                                       __DRI_ATTRIB_GREEN_MASK, &green);
 633       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 634                                       __DRI_ATTRIB_BLUE_MASK, &blue);
 635       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 636                                       __DRI_ATTRIB_ALPHA_MASK, &alpha);
 637
 638       for (unsigned j = 0; j < num_visuals; j++) {
 639          struct dri2_egl_config *dri2_conf;
 640
 641          if (visuals[j].rgba_masks[0] != red ||
 642              visuals[j].rgba_masks[1] != green ||
 643              visuals[j].rgba_masks[2] != blue ||
 644              visuals[j].rgba_masks[3] != alpha)
 645             continue;
 646
 647          const EGLint attr_list[] = {
 648             EGL_NATIVE_VISUAL_ID, visuals[j].gbm_format,
 649             EGL_NONE,
 650          };
 651
 652          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
 653                config_count + 1, EGL_WINDOW_BIT, attr_list, NULL);
 654          if (dri2_conf) {
 655             if (dri2_conf->base.ConfigID == config_count + 1)
 656                config_count++;
 657             format_count[j]++;
 658          }
 659       }
 660    }
 661
 662    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
 663       if (!format_count[i]) {
 664          _eglLog(_EGL_DEBUG, "No DRI config supports native format 0x%x",
 665                  visuals[i].gbm_format);
 666       }
 667    }
 668
 669    return (config_count != 0);
 670 }
 671
 672 static const struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
 673    .authenticate = dri2_drm_authenticate,
 674    .create_window_surface = dri2_drm_create_window_surface,
 675    .create_pixmap_surface = dri2_drm_create_pixmap_surface,
 676    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
 677    .destroy_surface = dri2_drm_destroy_surface,
 678    .create_image = dri2_drm_create_image_khr,
 679    .swap_buffers = dri2_drm_swap_buffers,
 680    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 681    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 682    .set_damage_region = dri2_fallback_set_damage_region,
 683    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 684    .copy_buffers = dri2_fallback_copy_buffers,
 685    .query_buffer_age = dri2_drm_query_buffer_age,
 686    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 687    .get_sync_values = dri2_fallback_get_sync_values,
 688    .get_dri_drawable = dri2_surface_get_dri_drawable,
 689 };
 690
 691 EGLBoolean
 692 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 693 {
 694    struct dri2_egl_display *dri2_dpy;
 695    struct gbm_device *gbm;
 696    const char *err;
 697
 698    /* Not supported yet */
 699    if (disp->Options.ForceSoftware)
 700       return EGL_FALSE;
 701
 702    loader_set_logger(_eglLog);
 703
 704    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 705    if (!dri2_dpy)
 706       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 707
 708    dri2_dpy->fd = -1;
 709    disp->DriverData = (void *) dri2_dpy;
 710
 711    gbm = disp->PlatformDisplay;
 712    if (gbm == NULL) {
 713       char buf[64];
 714       int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
 715       if (n != -1 && n < sizeof(buf))
 716          dri2_dpy->fd = loader_open_device(buf);
 717       gbm = gbm_create_device(dri2_dpy->fd);
 718       if (gbm == NULL) {
 719          err = "DRI2: failed to create gbm device";
 720          goto cleanup;
 721       }
 722       dri2_dpy->own_device = true;
 723    } else {
 724       dri2_dpy->fd = fcntl(gbm_device_get_fd(gbm), F_DUPFD_CLOEXEC, 3);
 725       if (dri2_dpy->fd < 0) {
 726          err = "DRI2: failed to fcntl() existing gbm device";
 727          goto cleanup;
 728       }
 729    }
 730
 731    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 732       err = "DRI2: gbm device using incorrect/incompatible backend";
 733       goto cleanup;
 734    }
 735
 736    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 737    dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->driver_name);
 738
 739    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 740    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 741    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 742    dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
 743    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 744
 745    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 746    dri2_dpy->gbm_dri->lookup_user_data = disp;
 747
 748    dri2_dpy->gbm_dri->get_buffers = dri2_drm_get_buffers;
 749    dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
 750    dri2_dpy->gbm_dri->get_buffers_with_format = dri2_drm_get_buffers_with_format;
 751    dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
 752    dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
 753    dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
 754
 755    dri2_dpy->gbm_dri->base.surface_lock_front_buffer = lock_front_buffer;
 756    dri2_dpy->gbm_dri->base.surface_release_buffer = release_buffer;
 757    dri2_dpy->gbm_dri->base.surface_has_free_buffers = has_free_buffers;
 758
 759    if (!dri2_setup_extensions(disp)) {
 760       err = "DRI2: failed to find required DRI extensions";
 761       goto cleanup;
 762    }
 763
 764    dri2_setup_screen(disp);
 765
 766    if (!drm_add_configs_for_visuals(drv, disp)) {
 767       err = "DRI2: failed to add configs";
 768       goto cleanup;
 769    }
 770
 771    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
 772    if (dri2_dpy->dri2)
 773       disp->Extensions.EXT_buffer_age = EGL_TRUE;
 774
 775 #ifdef HAVE_WAYLAND_PLATFORM
 776    dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 777 #endif
 778    dri2_set_WL_bind_wayland_display(drv, disp);
 779
 780    /* Fill vtbl last to prevent accidentally calling virtual function during
 781     * initialization.
 782     */
 783    dri2_dpy->vtbl = &dri2_drm_display_vtbl;
 784
 785    return EGL_TRUE;
 786
 787 cleanup:
 788    dri2_display_destroy(disp);
 789    return _eglError(EGL_NOT_INITIALIZED, err);
 790 }
 791
 792 void
 793 dri2_teardown_drm(struct dri2_egl_display *dri2_dpy)
 794 {
 795    if (dri2_dpy->own_device)
 796       gbm_device_destroy(&dri2_dpy->gbm_dri->base);
 797 }