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    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.red ||
 122        green != visual->rgba_masks.green ||
 123        blue != visual->rgba_masks.blue ||
 124        (alpha && visual->rgba_masks.alpha && alpha != visual->rgba_masks.alpha)) {
 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, native_surface))
 153       goto cleanup_surf;
 154
 155    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 156                                 dri2_surf->base.GLColorspace);
 157
 158    if (!config) {
 159       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 160       goto cleanup_surf;
 161    }
 162
 163    if (!dri2_drm_config_is_compatible(dri2_dpy, config, surface)) {
 164       _eglError(EGL_BAD_MATCH, "EGL config not compatible with GBM format");
 165       goto cleanup_surf;
 166    }
 167
 168    surf = gbm_dri_surface(surface);
 169    dri2_surf->gbm_surf = surf;
 170    dri2_surf->base.Width =  surf->base.width;
 171    dri2_surf->base.Height = surf->base.height;
 172    surf->dri_private = dri2_surf;
 173
 174    if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf->gbm_surf))
 175       goto cleanup_surf;
 176
 177    return &dri2_surf->base;
 178
 179  cleanup_surf:
 180    free(dri2_surf);
 181
 182    return NULL;
 183 }
 184
 185 static _EGLSurface *
 186 dri2_drm_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 187                                _EGLConfig *conf, void *native_window,
 188                                const EGLint *attrib_list)
 189 {
 190    /* From the EGL_MESA_platform_gbm spec, version 5:
 191     *
 192     *  It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 193     *  that belongs to the GBM platform. Any such call fails and generates
 194     *  EGL_BAD_PARAMETER.
 195     */
 196    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on GBM");
 197    return NULL;
 198 }
 199
 200 static EGLBoolean
 201 dri2_drm_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 202 {
 203    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 204    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 205
 206    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 207
 208    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 209       if (dri2_surf->color_buffers[i].bo)
 210          gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
 211    }
 212
 213    dri2_egl_surface_free_local_buffers(dri2_surf);
 214
 215    dri2_fini_surface(surf);
 216    free(surf);
 217
 218    return EGL_TRUE;
 219 }
 220
 221 static int
 222 get_back_bo(struct dri2_egl_surface *dri2_surf)
 223 {
 224    struct dri2_egl_display *dri2_dpy =
 225       dri2_egl_display(dri2_surf->base.Resource.Display);
 226    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 227    int age = 0;
 228
 229    if (dri2_surf->back == NULL) {
 230       for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 231          if (!dri2_surf->color_buffers[i].locked &&
 232               dri2_surf->color_buffers[i].age >= age) {
 233             dri2_surf->back = &dri2_surf->color_buffers[i];
 234             age = dri2_surf->color_buffers[i].age;
 235          }
 236       }
 237    }
 238
 239    if (dri2_surf->back == NULL)
 240       return -1;
 241    if (dri2_surf->back->bo == NULL) {
 242       if (surf->base.modifiers)
 243          dri2_surf->back->bo = gbm_bo_create_with_modifiers(&dri2_dpy->gbm_dri->base,
 244                                                             surf->base.width,
 245                                                             surf->base.height,
 246                                                             surf->base.format,
 247                                                             surf->base.modifiers,
 248                                                             surf->base.count);
 249       else
 250          dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 251                                              surf->base.width,
 252                                              surf->base.height,
 253                                              surf->base.format,
 254                                              surf->base.flags);
 255
 256    }
 257    if (dri2_surf->back->bo == NULL)
 258       return -1;
 259
 260    return 0;
 261 }
 262
 263 static int
 264 get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
 265 {
 266    struct dri2_egl_display *dri2_dpy =
 267       dri2_egl_display(dri2_surf->base.Resource.Display);
 268    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 269
 270    if (dri2_surf->current == NULL) {
 271       assert(!dri2_surf->color_buffers[0].locked);
 272       dri2_surf->current = &dri2_surf->color_buffers[0];
 273    }
 274
 275    if (dri2_surf->current->bo == NULL)
 276       dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 277                                              surf->base.width, surf->base.height,
 278                                              surf->base.format, surf->base.flags);
 279    if (dri2_surf->current->bo == NULL)
 280       return -1;
 281
 282    return 0;
 283 }
 284
 285 static void
 286 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 287 {
 288    struct dri2_egl_display *dri2_dpy =
 289       dri2_egl_display(dri2_surf->base.Resource.Display);
 290    struct gbm_dri_bo *bo;
 291    int name, pitch;
 292
 293    bo = gbm_dri_bo(dri2_surf->back->bo);
 294
 295    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 296    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 297
 298    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 299    buffer->name = name;
 300    buffer->pitch = pitch;
 301    buffer->cpp = 4;
 302    buffer->flags = 0;
 303 }
 304
 305 static __DRIbuffer *
 306 dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
 307                                  int *width, int *height,
 308                                  unsigned int *attachments, int count,
 309                                  int *out_count, void *loaderPrivate)
 310 {
 311    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 312    int i, j;
 313
 314    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 315       __DRIbuffer *local;
 316
 317       assert(attachments[i] < __DRI_BUFFER_COUNT);
 318       assert(j < ARRAY_SIZE(dri2_surf->buffers));
 319
 320       switch (attachments[i]) {
 321       case __DRI_BUFFER_BACK_LEFT:
 322          if (get_back_bo(dri2_surf) < 0) {
 323             _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 324             return NULL;
 325          }
 326          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 327          break;
 328       default:
 329          local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
 330                                                      attachments[i + 1]);
 331
 332          if (!local) {
 333             _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
 334             return NULL;
 335          }
 336          dri2_surf->buffers[j] = *local;
 337          break;
 338       }
 339    }
 340
 341    *out_count = j;
 342    if (j == 0)
 343       return NULL;
 344
 345    *width = dri2_surf->base.Width;
 346    *height = dri2_surf->base.Height;
 347
 348    return dri2_surf->buffers;
 349 }
 350
 351 static __DRIbuffer *
 352 dri2_drm_get_buffers(__DRIdrawable * driDrawable,
 353                      int *width, int *height,
 354                      unsigned int *attachments, int count,
 355                      int *out_count, void *loaderPrivate)
 356 {
 357    unsigned int *attachments_with_format;
 358    __DRIbuffer *buffer;
 359    const unsigned int format = 32;
 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 (int 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 = 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
 417    if (!dri2_dpy->flush) {
 418       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 419       return EGL_TRUE;
 420    }
 421
 422    if (dri2_surf->current)
 423       _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 424    for (unsigned 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       return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 432
 433    dri2_surf->current = dri2_surf->back;
 434    dri2_surf->current->age = 1;
 435    dri2_surf->back = NULL;
 436
 437    dri2_flush_drawable_for_swapbuffers(disp, draw);
 438    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 439
 440    return EGL_TRUE;
 441 }
 442
 443 static EGLint
 444 dri2_drm_query_buffer_age(_EGLDriver *drv,
 445                           _EGLDisplay *disp, _EGLSurface *surface)
 446 {
 447    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 448
 449    if (get_back_bo(dri2_surf) < 0) {
 450       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 451       return -1;
 452    }
 453
 454    return dri2_surf->back->age;
 455 }
 456
 457 static _EGLImage *
 458 dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 459                                  EGLClientBuffer buffer, const EGLint *attr_list)
 460 {
 461    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 462    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 463    struct dri2_egl_image *dri2_img;
 464
 465    dri2_img = malloc(sizeof *dri2_img);
 466    if (!dri2_img) {
 467       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 468       return NULL;
 469    }
 470
 471    _eglInitImage(&dri2_img->base, disp);
 472
 473    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 474    if (dri2_img->dri_image == NULL) {
 475       free(dri2_img);
 476       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 477       return NULL;
 478    }
 479
 480    return &dri2_img->base;
 481 }
 482
 483 static _EGLImage *
 484 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 485                           _EGLContext *ctx, EGLenum target,
 486                           EGLClientBuffer buffer, const EGLint *attr_list)
 487 {
 488    (void) drv;
 489
 490    switch (target) {
 491    case EGL_NATIVE_PIXMAP_KHR:
 492       return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 493    default:
 494       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 495    }
 496 }
 497
 498 static int
 499 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 500 {
 501    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 502
 503    return drmAuthMagic(dri2_dpy->fd, id);
 504 }
 505
 506 static void
 507 swrast_put_image2(__DRIdrawable *driDrawable,
 508                   int            op,
 509                   int            x,
 510                   int            y,
 511                   int            width,
 512                   int            height,
 513                   int            stride,
 514                   char          *data,
 515                   void          *loaderPrivate)
 516 {
 517    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 518    int internal_stride;
 519    struct gbm_dri_bo *bo;
 520    uint32_t bpp;
 521    int x_bytes, width_bytes;
 522    char *src, *dst;
 523
 524    if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
 525        op != __DRI_SWRAST_IMAGE_OP_SWAP)
 526       return;
 527
 528    if (get_swrast_front_bo(dri2_surf) < 0)
 529       return;
 530
 531    bo = gbm_dri_bo(dri2_surf->current->bo);
 532
 533    bpp = gbm_bo_get_bpp(&bo->base);
 534    if (bpp == 0)
 535       return;
 536
 537    x_bytes = x * (bpp >> 3);
 538    width_bytes = width * (bpp >> 3);
 539
 540    if (gbm_dri_bo_map_dumb(bo) == NULL)
 541       return;
 542
 543    internal_stride = bo->base.stride;
 544
 545    dst = bo->map + x_bytes + (y * internal_stride);
 546    src = data;
 547
 548    for (int i = 0; i < height; i++) {
 549       memcpy(dst, src, width_bytes);
 550       dst += internal_stride;
 551       src += stride;
 552    }
 553
 554    gbm_dri_bo_unmap_dumb(bo);
 555 }
 556
 557 static void
 558 swrast_get_image(__DRIdrawable *driDrawable,
 559                  int            x,
 560                  int            y,
 561                  int            width,
 562                  int            height,
 563                  char          *data,
 564                  void          *loaderPrivate)
 565 {
 566    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 567    int internal_stride, stride;
 568    struct gbm_dri_bo *bo;
 569    uint32_t bpp;
 570    int x_bytes, width_bytes;
 571    char *src, *dst;
 572
 573    if (get_swrast_front_bo(dri2_surf) < 0)
 574       return;
 575
 576    bo = gbm_dri_bo(dri2_surf->current->bo);
 577
 578    bpp = gbm_bo_get_bpp(&bo->base);
 579    if (bpp == 0)
 580       return;
 581
 582    x_bytes = x * (bpp >> 3);
 583    width_bytes = width * (bpp >> 3);
 584
 585    internal_stride = bo->base.stride;
 586    stride = width_bytes;
 587
 588    if (gbm_dri_bo_map_dumb(bo) == NULL)
 589       return;
 590
 591    dst = data;
 592    src = bo->map + x_bytes + (y * internal_stride);
 593
 594    for (int i = 0; i < height; i++) {
 595       memcpy(dst, src, width_bytes);
 596       dst += stride;
 597       src += internal_stride;
 598    }
 599
 600    gbm_dri_bo_unmap_dumb(bo);
 601 }
 602
 603 static EGLBoolean
 604 drm_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
 605 {
 606    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 607    const struct gbm_dri_visual *visuals = dri2_dpy->gbm_dri->visual_table;
 608    int num_visuals = dri2_dpy->gbm_dri->num_visuals;
 609    unsigned int format_count[num_visuals];
 610    unsigned int config_count = 0;
 611
 612    memset(format_count, 0, num_visuals * sizeof(unsigned int));
 613
 614    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
 615       unsigned int red, green, blue, alpha;
 616
 617       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 618                                       __DRI_ATTRIB_RED_MASK, &red);
 619       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 620                                       __DRI_ATTRIB_GREEN_MASK, &green);
 621       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 622                                       __DRI_ATTRIB_BLUE_MASK, &blue);
 623       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 624                                       __DRI_ATTRIB_ALPHA_MASK, &alpha);
 625
 626       for (unsigned j = 0; j < num_visuals; j++) {
 627          struct dri2_egl_config *dri2_conf;
 628
 629          if (visuals[j].rgba_masks.red != red ||
 630              visuals[j].rgba_masks.green != green ||
 631              visuals[j].rgba_masks.blue != blue ||
 632              visuals[j].rgba_masks.alpha != alpha)
 633             continue;
 634
 635          const EGLint attr_list[] = {
 636             EGL_NATIVE_VISUAL_ID, visuals[j].gbm_format,
 637             EGL_NONE,
 638          };
 639
 640          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
 641                config_count + 1, EGL_WINDOW_BIT, attr_list, NULL);
 642          if (dri2_conf) {
 643             if (dri2_conf->base.ConfigID == config_count + 1)
 644                config_count++;
 645             format_count[j]++;
 646          }
 647       }
 648    }
 649
 650    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
 651       if (!format_count[i]) {
 652          struct gbm_format_name_desc desc;
 653          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
 654                  gbm_format_get_name(visuals[i].gbm_format, &desc));
 655       }
 656    }
 657
 658    return (config_count != 0);
 659 }
 660
 661 static const struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
 662    .authenticate = dri2_drm_authenticate,
 663    .create_window_surface = dri2_drm_create_window_surface,
 664    .create_pixmap_surface = dri2_drm_create_pixmap_surface,
 665    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
 666    .destroy_surface = dri2_drm_destroy_surface,
 667    .create_image = dri2_drm_create_image_khr,
 668    .swap_buffers = dri2_drm_swap_buffers,
 669    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 670    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 671    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 672    .copy_buffers = dri2_fallback_copy_buffers,
 673    .query_buffer_age = dri2_drm_query_buffer_age,
 674    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 675    .get_sync_values = dri2_fallback_get_sync_values,
 676    .get_dri_drawable = dri2_surface_get_dri_drawable,
 677 };
 678
 679 EGLBoolean
 680 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 681 {
 682    _EGLDevice *dev;
 683    struct dri2_egl_display *dri2_dpy;
 684    struct gbm_device *gbm;
 685    const char *err;
 686
 687    /* Not supported yet */
 688    if (disp->Options.ForceSoftware)
 689       return EGL_FALSE;
 690
 691    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 692    if (!dri2_dpy)
 693       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 694
 695    dri2_dpy->fd = -1;
 696    disp->DriverData = (void *) dri2_dpy;
 697
 698    gbm = disp->PlatformDisplay;
 699    if (gbm == NULL) {
 700       char buf[64];
 701       int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
 702       if (n != -1 && n < sizeof(buf))
 703          dri2_dpy->fd = loader_open_device(buf);
 704       gbm = gbm_create_device(dri2_dpy->fd);
 705       if (gbm == NULL) {
 706          err = "DRI2: failed to create gbm device";
 707          goto cleanup;
 708       }
 709       dri2_dpy->own_device = true;
 710    } else {
 711       dri2_dpy->fd = fcntl(gbm_device_get_fd(gbm), F_DUPFD_CLOEXEC, 3);
 712       if (dri2_dpy->fd < 0) {
 713          err = "DRI2: failed to fcntl() existing gbm device";
 714          goto cleanup;
 715       }
 716    }
 717    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 718
 719    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 720       err = "DRI2: gbm device using incorrect/incompatible backend";
 721       goto cleanup;
 722    }
 723
 724    dev = _eglAddDevice(dri2_dpy->fd, false);
 725    if (!dev) {
 726       err = "DRI2: failed to find EGLDevice";
 727       goto cleanup;
 728    }
 729
 730    disp->Device = dev;
 731
 732    dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->driver_name);
 733
 734    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 735    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 736    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 737    dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
 738    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 739
 740    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 741    dri2_dpy->gbm_dri->lookup_user_data = disp;
 742
 743    dri2_dpy->gbm_dri->get_buffers = dri2_drm_get_buffers;
 744    dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
 745    dri2_dpy->gbm_dri->get_buffers_with_format = dri2_drm_get_buffers_with_format;
 746    dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
 747    dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
 748    dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
 749
 750    dri2_dpy->gbm_dri->base.surface_lock_front_buffer = lock_front_buffer;
 751    dri2_dpy->gbm_dri->base.surface_release_buffer = release_buffer;
 752    dri2_dpy->gbm_dri->base.surface_has_free_buffers = has_free_buffers;
 753
 754    if (!dri2_setup_extensions(disp)) {
 755       err = "DRI2: failed to find required DRI extensions";
 756       goto cleanup;
 757    }
 758
 759    dri2_setup_screen(disp);
 760
 761    if (!drm_add_configs_for_visuals(drv, disp)) {
 762       err = "DRI2: failed to add configs";
 763       goto cleanup;
 764    }
 765
 766    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
 767    if (dri2_dpy->dri2)
 768       disp->Extensions.EXT_buffer_age = EGL_TRUE;
 769
 770 #ifdef HAVE_WAYLAND_PLATFORM
 771    dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 772 #endif
 773    dri2_set_WL_bind_wayland_display(drv, disp);
 774
 775    /* Fill vtbl last to prevent accidentally calling virtual function during
 776     * initialization.
 777     */
 778    dri2_dpy->vtbl = &dri2_drm_display_vtbl;
 779
 780    return EGL_TRUE;
 781
 782 cleanup:
 783    dri2_display_destroy(disp);
 784    return _eglError(EGL_NOT_INITIALIZED, err);
 785 }
 786
 787 void
 788 dri2_teardown_drm(struct dri2_egl_display *dri2_dpy)
 789 {
 790    if (dri2_dpy->own_device)
 791       gbm_device_destroy(&dri2_dpy->gbm_dri->base);
 792 }