src/egl/drivers/dri2/platform_x11.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 <stdbool.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43
  44 #include "egl_dri2.h"
  45 #include "egl_dri2_fallbacks.h"
  46 #include "loader.h"
  47
  48 #ifdef HAVE_DRI3
  49 #include "platform_x11_dri3.h"
  50 #endif
  51
  52 static EGLBoolean
  53 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  54                        EGLint interval);
  55
  56 static void
  57 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  58                      struct dri2_egl_surface * dri2_surf)
  59 {
  60    uint32_t           mask;
  61    const uint32_t     function = GXcopy;
  62    uint32_t           valgc[2];
  63
  64    /* create GC's */
  65    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  66    mask = XCB_GC_FUNCTION;
  67    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  68
  69    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  70    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  71    valgc[0] = function;
  72    valgc[1] = False;
  73    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  74    switch (dri2_surf->depth) {
  75       case 32:
  76       case 24:
  77          dri2_surf->bytes_per_pixel = 4;
  78          break;
  79       case 16:
  80          dri2_surf->bytes_per_pixel = 2;
  81          break;
  82       case 8:
  83          dri2_surf->bytes_per_pixel = 1;
  84          break;
  85       case 0:
  86          dri2_surf->bytes_per_pixel = 0;
  87          break;
  88       default:
  89          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  90    }
  91 }
  92
  93 static void
  94 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  95                       struct dri2_egl_surface * dri2_surf)
  96 {
  97    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  98    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
  99 }
 100
 101 static void
 102 swrastGetDrawableInfo(__DRIdrawable * draw,
 103                       int *x, int *y, int *w, int *h,
 104                       void *loaderPrivate)
 105 {
 106    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 107    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 108
 109    xcb_get_geometry_cookie_t cookie;
 110    xcb_get_geometry_reply_t *reply;
 111    xcb_generic_error_t *error;
 112
 113    *w = *h = 0;
 114    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 115    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 116    if (reply == NULL)
 117       return;
 118
 119    if (error != NULL) {
 120       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 121       free(error);
 122    } else {
 123       *w = reply->width;
 124       *h = reply->height;
 125    }
 126    free(reply);
 127 }
 128
 129 static void
 130 swrastPutImage(__DRIdrawable * draw, int op,
 131                int x, int y, int w, int h,
 132                char *data, void *loaderPrivate)
 133 {
 134    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 135    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 136
 137    xcb_gcontext_t gc;
 138
 139    switch (op) {
 140    case __DRI_SWRAST_IMAGE_OP_DRAW:
 141       gc = dri2_surf->gc;
 142       break;
 143    case __DRI_SWRAST_IMAGE_OP_SWAP:
 144       gc = dri2_surf->swapgc;
 145       break;
 146    default:
 147       return;
 148    }
 149
 150    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 151                  gc, w, h, x, y, 0, dri2_surf->depth,
 152                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 153 }
 154
 155 static void
 156 swrastGetImage(__DRIdrawable * read,
 157                int x, int y, int w, int h,
 158                char *data, void *loaderPrivate)
 159 {
 160    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 161    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 162
 163    xcb_get_image_cookie_t cookie;
 164    xcb_get_image_reply_t *reply;
 165    xcb_generic_error_t *error;
 166
 167    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 168                            dri2_surf->drawable, x, y, w, h, ~0);
 169    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 170    if (reply == NULL)
 171       return;
 172
 173    if (error != NULL) {
 174       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 175       free(error);
 176    } else {
 177       uint32_t bytes = xcb_get_image_data_length(reply);
 178       uint8_t *idata = xcb_get_image_data(reply);
 179       memcpy(data, idata, bytes);
 180    }
 181    free(reply);
 182 }
 183
 184
 185 static xcb_screen_t *
 186 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 187 {
 188     for (; iter.rem; --screen, xcb_screen_next(&iter))
 189         if (screen == 0)
 190             return iter.data;
 191
 192     return NULL;
 193 }
 194
 195
 196 /**
 197  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 198  */
 199 static _EGLSurface *
 200 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 201                         _EGLConfig *conf, void *native_surface,
 202                         const EGLint *attrib_list)
 203 {
 204    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 205    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 206    struct dri2_egl_surface *dri2_surf;
 207    xcb_get_geometry_cookie_t cookie;
 208    xcb_get_geometry_reply_t *reply;
 209    xcb_screen_iterator_t s;
 210    xcb_generic_error_t *error;
 211    xcb_drawable_t drawable;
 212    xcb_screen_t *screen;
 213    const __DRIconfig *config;
 214
 215    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 216    drawable = (uintptr_t) native_surface;
 217
 218    (void) drv;
 219
 220    dri2_surf = malloc(sizeof *dri2_surf);
 221    if (!dri2_surf) {
 222       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 223       return NULL;
 224    }
 225
 226    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 227       goto cleanup_surf;
 228
 229    dri2_surf->region = XCB_NONE;
 230    if (type == EGL_PBUFFER_BIT) {
 231       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 232       screen = get_xcb_screen(s, dri2_dpy->screen);
 233       if (!screen) {
 234          _eglError(EGL_BAD_ALLOC, "failed to get xcb screen");
 235          goto cleanup_surf;
 236       }
 237
 238       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 239       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 240                        dri2_surf->drawable, screen->root,
 241                         dri2_surf->base.Width, dri2_surf->base.Height);
 242    } else {
 243       if (!drawable) {
 244          if (type == EGL_WINDOW_BIT)
 245             _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 246          else
 247             _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 248          goto cleanup_surf;
 249       }
 250       dri2_surf->drawable = drawable;
 251    }
 252
 253    config = dri2_get_dri_config(dri2_conf, type,
 254                                 dri2_surf->base.GLColorspace);
 255
 256    if (dri2_dpy->dri2) {
 257       dri2_surf->dri_drawable =
 258          (*dri2_dpy->dri2->createNewDrawable)(dri2_dpy->dri_screen, config,
 259                                               dri2_surf);
 260    } else {
 261       assert(dri2_dpy->swrast);
 262       dri2_surf->dri_drawable =
 263          (*dri2_dpy->swrast->createNewDrawable)(dri2_dpy->dri_screen, config,
 264                                                 dri2_surf);
 265    }
 266
 267    if (dri2_surf->dri_drawable == NULL) {
 268       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 269       goto cleanup_pixmap;
 270    }
 271
 272    if (type != EGL_PBUFFER_BIT) {
 273       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 274       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 275       if (error != NULL) {
 276          if (error->error_code == BadAlloc)
 277             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 278          else if (type == EGL_WINDOW_BIT)
 279             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 280          else
 281             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 282          free(error);
 283          goto cleanup_dri_drawable;
 284       } else if (reply == NULL) {
 285          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 286          goto cleanup_dri_drawable;
 287       }
 288
 289       dri2_surf->base.Width = reply->width;
 290       dri2_surf->base.Height = reply->height;
 291       dri2_surf->depth = reply->depth;
 292       free(reply);
 293    }
 294
 295    if (dri2_dpy->dri2) {
 296       xcb_void_cookie_t cookie;
 297       int conn_error;
 298
 299       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 300                                                 dri2_surf->drawable);
 301       error = xcb_request_check(dri2_dpy->conn, cookie);
 302       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 303       if (conn_error || error != NULL) {
 304          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 305             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 306          else if (type == EGL_WINDOW_BIT)
 307             _eglError(EGL_BAD_NATIVE_WINDOW,
 308                       "xcb_dri2_create_drawable_checked");
 309          else
 310             _eglError(EGL_BAD_NATIVE_PIXMAP,
 311                       "xcb_dri2_create_drawable_checked");
 312          free(error);
 313          goto cleanup_dri_drawable;
 314       }
 315    } else {
 316       if (type == EGL_PBUFFER_BIT) {
 317          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 318       }
 319       swrastCreateDrawable(dri2_dpy, dri2_surf);
 320    }
 321
 322    /* we always copy the back buffer to front */
 323    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 324
 325    return &dri2_surf->base;
 326
 327  cleanup_dri_drawable:
 328    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 329  cleanup_pixmap:
 330    if (type == EGL_PBUFFER_BIT)
 331       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 332  cleanup_surf:
 333    free(dri2_surf);
 334
 335    return NULL;
 336 }
 337
 338 /**
 339  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 340  */
 341 static _EGLSurface *
 342 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 343                                _EGLConfig *conf, void *native_window,
 344                                const EGLint *attrib_list)
 345 {
 346    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 347    _EGLSurface *surf;
 348
 349    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 350                                   native_window, attrib_list);
 351    if (surf != NULL) {
 352       /* When we first create the DRI2 drawable, its swap interval on the
 353        * server side is 1.
 354        */
 355       surf->SwapInterval = 1;
 356
 357       /* Override that with a driconf-set value. */
 358       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 359    }
 360
 361    return surf;
 362 }
 363
 364 static _EGLSurface *
 365 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 366                                _EGLConfig *conf, void *native_pixmap,
 367                                const EGLint *attrib_list)
 368 {
 369    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 370                                   native_pixmap, attrib_list);
 371 }
 372
 373 static _EGLSurface *
 374 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 375                                 _EGLConfig *conf, const EGLint *attrib_list)
 376 {
 377    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 378                                   XCB_WINDOW_NONE, attrib_list);
 379 }
 380
 381 static EGLBoolean
 382 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 383 {
 384    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 385    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 386
 387    (void) drv;
 388
 389    if (!_eglPutSurface(surf))
 390       return EGL_TRUE;
 391
 392    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 393
 394    if (dri2_dpy->dri2) {
 395       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 396    } else {
 397       assert(dri2_dpy->swrast);
 398       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 399    }
 400
 401    if (surf->Type == EGL_PBUFFER_BIT)
 402       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 403
 404    free(surf);
 405
 406    return EGL_TRUE;
 407 }
 408
 409 /**
 410  * Process list of buffer received from the server
 411  *
 412  * Processes the list of buffers received in a reply from the server to either
 413  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 414  */
 415 static void
 416 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 417                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 418 {
 419    struct dri2_egl_display *dri2_dpy =
 420       dri2_egl_display(dri2_surf->base.Resource.Display);
 421    xcb_rectangle_t rectangle;
 422    unsigned i;
 423
 424    dri2_surf->buffer_count = count;
 425    dri2_surf->have_fake_front = 0;
 426
 427    /* This assumes the DRI2 buffer attachment tokens matches the
 428     * __DRIbuffer tokens. */
 429    for (i = 0; i < count; i++) {
 430       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 431       dri2_surf->buffers[i].name = buffers[i].name;
 432       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 433       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 434       dri2_surf->buffers[i].flags = buffers[i].flags;
 435
 436       /* We only use the DRI drivers single buffer configs.  This
 437        * means that if we try to render to a window, DRI2 will give us
 438        * the fake front buffer, which we'll use as a back buffer.
 439        * Note that EGL doesn't require that several clients rendering
 440        * to the same window must see the same aux buffers. */
 441       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 442          dri2_surf->have_fake_front = 1;
 443    }
 444
 445    if (dri2_surf->region != XCB_NONE)
 446       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 447
 448    rectangle.x = 0;
 449    rectangle.y = 0;
 450    rectangle.width = dri2_surf->base.Width;
 451    rectangle.height = dri2_surf->base.Height;
 452    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 453    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 454 }
 455
 456 static __DRIbuffer *
 457 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 458                      int *width, int *height,
 459                      unsigned int *attachments, int count,
 460                      int *out_count, void *loaderPrivate)
 461 {
 462    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 463    struct dri2_egl_display *dri2_dpy =
 464       dri2_egl_display(dri2_surf->base.Resource.Display);
 465    xcb_dri2_dri2_buffer_t *buffers;
 466    xcb_dri2_get_buffers_reply_t *reply;
 467    xcb_dri2_get_buffers_cookie_t cookie;
 468
 469    (void) driDrawable;
 470
 471    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 472                                             dri2_surf->drawable,
 473                                             count, count, attachments);
 474    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 475    if (reply == NULL)
 476       return NULL;
 477    buffers = xcb_dri2_get_buffers_buffers (reply);
 478    if (buffers == NULL)
 479       return NULL;
 480
 481    *out_count = reply->count;
 482    dri2_surf->base.Width = *width = reply->width;
 483    dri2_surf->base.Height = *height = reply->height;
 484    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 485
 486    free(reply);
 487
 488    return dri2_surf->buffers;
 489 }
 490
 491 static __DRIbuffer *
 492 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 493                                  int *width, int *height,
 494                                  unsigned int *attachments, int count,
 495                                  int *out_count, void *loaderPrivate)
 496 {
 497    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 498    struct dri2_egl_display *dri2_dpy =
 499       dri2_egl_display(dri2_surf->base.Resource.Display);
 500    xcb_dri2_dri2_buffer_t *buffers;
 501    xcb_dri2_get_buffers_with_format_reply_t *reply;
 502    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 503    xcb_dri2_attach_format_t *format_attachments;
 504
 505    (void) driDrawable;
 506
 507    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 508    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 509                                                         dri2_surf->drawable,
 510                                                         count, count,
 511                                                         format_attachments);
 512
 513    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 514                                                    cookie, NULL);
 515    if (reply == NULL)
 516       return NULL;
 517
 518    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 519    dri2_surf->base.Width = *width = reply->width;
 520    dri2_surf->base.Height = *height = reply->height;
 521    *out_count = reply->count;
 522    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 523
 524    free(reply);
 525
 526    return dri2_surf->buffers;
 527 }
 528
 529 static void
 530 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 531 {
 532    (void) driDrawable;
 533
 534    /* FIXME: Does EGL support front buffer rendering at all? */
 535
 536 #if 0
 537    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 538
 539    dri2WaitGL(dri2_surf);
 540 #else
 541    (void) loaderPrivate;
 542 #endif
 543 }
 544
 545 static int
 546 dri2_x11_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 547 {
 548    xcb_dri2_authenticate_reply_t *authenticate;
 549    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 550    xcb_screen_iterator_t s;
 551    xcb_screen_t *screen;
 552    int ret = 0;
 553
 554    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 555
 556    screen = get_xcb_screen(s, dri2_dpy->screen);
 557    if (!screen) {
 558       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 559       return -1;
 560    }
 561
 562    authenticate_cookie =
 563       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
 564    authenticate =
 565       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 566
 567    if (authenticate == NULL || !authenticate->authenticated)
 568       ret = -1;
 569
 570    free(authenticate);
 571
 572    return ret;
 573 }
 574
 575 static EGLBoolean
 576 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 577 {
 578 #ifdef HAVE_LIBDRM
 579    drm_magic_t magic;
 580
 581    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 582       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 583       return EGL_FALSE;
 584    }
 585
 586    if (dri2_x11_authenticate(dri2_dpy, magic) < 0) {
 587       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 588       return EGL_FALSE;
 589    }
 590 #endif
 591    return EGL_TRUE;
 592 }
 593
 594 static EGLBoolean
 595 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 596 {
 597    xcb_xfixes_query_version_reply_t *xfixes_query;
 598    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 599    xcb_dri2_query_version_reply_t *dri2_query;
 600    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 601    xcb_dri2_connect_reply_t *connect;
 602    xcb_dri2_connect_cookie_t connect_cookie;
 603    xcb_generic_error_t *error;
 604    xcb_screen_iterator_t s;
 605    xcb_screen_t *screen;
 606    char *driver_name, *loader_driver_name, *device_name;
 607    const xcb_query_extension_reply_t *extension;
 608
 609    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 610    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 611
 612    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 613    if (!(extension && extension->present))
 614       return EGL_FALSE;
 615
 616    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 617    if (!(extension && extension->present))
 618       return EGL_FALSE;
 619
 620    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 621                                                   XCB_XFIXES_MAJOR_VERSION,
 622                                                   XCB_XFIXES_MINOR_VERSION);
 623
 624    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 625                                                XCB_DRI2_MAJOR_VERSION,
 626                                                XCB_DRI2_MINOR_VERSION);
 627
 628    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 629    screen = get_xcb_screen(s, dri2_dpy->screen);
 630    if (!screen) {
 631       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 632       return EGL_FALSE;
 633    }
 634    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
 635                                    XCB_DRI2_DRIVER_TYPE_DRI);
 636
 637    xfixes_query =
 638       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 639                                       xfixes_query_cookie, &error);
 640    if (xfixes_query == NULL ||
 641        error != NULL || xfixes_query->major_version < 2) {
 642       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 643       free(error);
 644       return EGL_FALSE;
 645    }
 646    free(xfixes_query);
 647
 648    dri2_query =
 649       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 650    if (dri2_query == NULL || error != NULL) {
 651       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 652       free(error);
 653       return EGL_FALSE;
 654    }
 655    dri2_dpy->dri2_major = dri2_query->major_version;
 656    dri2_dpy->dri2_minor = dri2_query->minor_version;
 657    free(dri2_query);
 658
 659    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 660    if (connect == NULL ||
 661        connect->driver_name_length + connect->device_name_length == 0) {
 662       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 663       return EGL_FALSE;
 664    }
 665
 666    device_name = xcb_dri2_connect_device_name (connect);
 667
 668    dri2_dpy->device_name =
 669       strndup(device_name,
 670               xcb_dri2_connect_device_name_length(connect));
 671
 672    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
 673    if (dri2_dpy->fd == -1) {
 674       _eglLog(_EGL_WARNING,
 675               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
 676               strerror(errno));
 677       free(dri2_dpy->device_name);
 678       free(connect);
 679       return EGL_FALSE;
 680    }
 681
 682    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 683       close(dri2_dpy->fd);
 684       free(dri2_dpy->device_name);
 685       free(connect);
 686       return EGL_FALSE;
 687    }
 688
 689    driver_name = xcb_dri2_connect_driver_name (connect);
 690
 691    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 692     * Otherwise, default to the server's value.
 693     */
 694    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd, 0);
 695    if (loader_driver_name) {
 696       dri2_dpy->driver_name = loader_driver_name;
 697    } else {
 698       dri2_dpy->driver_name =
 699          strndup(driver_name,
 700                  xcb_dri2_connect_driver_name_length(connect));
 701    }
 702
 703    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 704       close(dri2_dpy->fd);
 705       free(dri2_dpy->device_name);
 706       free(dri2_dpy->driver_name);
 707       free(connect);
 708       return EGL_FALSE;
 709    }
 710    free(connect);
 711
 712    return EGL_TRUE;
 713 }
 714
 715 static EGLBoolean
 716 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 717                                  _EGLDisplay *disp, bool supports_preserved)
 718 {
 719    xcb_screen_iterator_t s;
 720    xcb_depth_iterator_t d;
 721    xcb_visualtype_t *visuals;
 722    int i, j, id;
 723    unsigned int rgba_masks[4];
 724    EGLint surface_type;
 725    EGLint config_attrs[] = {
 726            EGL_NATIVE_VISUAL_ID,   0,
 727            EGL_NATIVE_VISUAL_TYPE, 0,
 728            EGL_NONE
 729    };
 730
 731    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 732    d = xcb_screen_allowed_depths_iterator(get_xcb_screen(s, dri2_dpy->screen));
 733    id = 1;
 734
 735    surface_type =
 736       EGL_WINDOW_BIT |
 737       EGL_PIXMAP_BIT |
 738       EGL_PBUFFER_BIT;
 739
 740    if (supports_preserved)
 741       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 742
 743    while (d.rem > 0) {
 744       EGLBoolean class_added[6] = { 0, };
 745
 746       visuals = xcb_depth_visuals(d.data);
 747       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 748          if (class_added[visuals[i]._class])
 749             continue;
 750
 751          class_added[visuals[i]._class] = EGL_TRUE;
 752          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 753             config_attrs[1] = visuals[i].visual_id;
 754             config_attrs[3] = visuals[i]._class;
 755
 756             rgba_masks[0] = visuals[i].red_mask;
 757             rgba_masks[1] = visuals[i].green_mask;
 758             rgba_masks[2] = visuals[i].blue_mask;
 759             rgba_masks[3] = 0;
 760             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 761                             surface_type, config_attrs, rgba_masks);
 762
 763             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 764              * Otherwise it will only match a 32-bit RGBA visual.  On a
 765              * composited window manager on X11, this will make all of the
 766              * EGLConfigs with destination alpha get blended by the
 767              * compositor.  This is probably not what the application
 768              * wants... especially on drivers that only have 32-bit RGBA
 769              * EGLConfigs! */
 770             if (d.data->depth == 24) {
 771                rgba_masks[3] =
 772                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 773                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 774                                surface_type, config_attrs, rgba_masks);
 775             }
 776          }
 777       }
 778
 779       xcb_depth_next(&d);
 780    }
 781
 782    if (!_eglGetArraySize(disp->Configs)) {
 783       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 784       return EGL_FALSE;
 785    }
 786
 787    return EGL_TRUE;
 788 }
 789
 790 static EGLBoolean
 791 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 792                  _EGLSurface *draw, xcb_xfixes_region_t region)
 793 {
 794    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 795    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 796    enum xcb_dri2_attachment_t render_attachment;
 797    xcb_dri2_copy_region_cookie_t cookie;
 798
 799    /* No-op for a pixmap or pbuffer surface */
 800    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 801       return EGL_TRUE;
 802
 803    if (dri2_dpy->flush)
 804       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 805
 806    if (dri2_surf->have_fake_front)
 807       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 808    else
 809       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 810
 811    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 812                                            dri2_surf->drawable,
 813                                            region,
 814                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 815                                            render_attachment);
 816    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 817
 818    return EGL_TRUE;
 819 }
 820
 821 static int64_t
 822 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 823                           int64_t msc, int64_t divisor, int64_t remainder)
 824 {
 825    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 826    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 827    uint32_t msc_hi = msc >> 32;
 828    uint32_t msc_lo = msc & 0xffffffff;
 829    uint32_t divisor_hi = divisor >> 32;
 830    uint32_t divisor_lo = divisor & 0xffffffff;
 831    uint32_t remainder_hi = remainder >> 32;
 832    uint32_t remainder_lo = remainder & 0xffffffff;
 833    xcb_dri2_swap_buffers_cookie_t cookie;
 834    xcb_dri2_swap_buffers_reply_t *reply;
 835    int64_t swap_count = -1;
 836
 837    /* No-op for a pixmap or pbuffer surface */
 838    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 839       return 0;
 840
 841    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 842       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 843
 844    dri2_flush_drawable_for_swapbuffers(disp, draw);
 845
 846    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 847                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 848
 849    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 850
 851    if (reply) {
 852       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 853       free(reply);
 854    }
 855
 856    /* Since we aren't watching for the server's invalidate events like we're
 857     * supposed to (due to XCB providing no mechanism for filtering the events
 858     * the way xlib does), and SwapBuffers is a common cause of invalidate
 859     * events, just shove one down to the driver, even though we haven't told
 860     * the driver that we're the kind of loader that provides reliable
 861     * invalidate events.  This causes the driver to request buffers again at
 862     * its next draw, so that we get the correct buffers if a pageflip
 863     * happened.  The driver should still be using the viewport hack to catch
 864     * window resizes.
 865     */
 866    if (dri2_dpy->flush &&
 867        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 868       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 869
 870    return swap_count;
 871 }
 872
 873 static EGLBoolean
 874 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 875 {
 876    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 877    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 878
 879    if (dri2_dpy->dri2) {
 880       if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1) {
 881           return EGL_TRUE;
 882       }
 883       /* Swap failed with a window drawable. */
 884       _eglError(EGL_BAD_NATIVE_WINDOW, __FUNCTION__);
 885       return EGL_FALSE;
 886    } else {
 887       assert(dri2_dpy->swrast);
 888
 889       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 890       return EGL_TRUE;
 891    }
 892 }
 893
 894 static EGLBoolean
 895 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 896                              _EGLSurface *draw,
 897                              EGLint numRects, const EGLint *rects)
 898 {
 899    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 900    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 901    EGLBoolean ret;
 902    xcb_xfixes_region_t region;
 903    xcb_rectangle_t rectangles[16];
 904    int i;
 905
 906    if (numRects > (int)ARRAY_SIZE(rectangles))
 907       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 908
 909    for (i = 0; i < numRects; i++) {
 910       rectangles[i].x = rects[i * 4];
 911       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 912       rectangles[i].width = rects[i * 4 + 2];
 913       rectangles[i].height = rects[i * 4 + 3];
 914    }
 915
 916    region = xcb_generate_id(dri2_dpy->conn);
 917    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 918    ret = dri2_copy_region(drv, disp, draw, region);
 919    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 920
 921    return ret;
 922 }
 923
 924 static EGLBoolean
 925 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 926                      EGLint x, EGLint y, EGLint width, EGLint height)
 927 {
 928    const EGLint rect[4] = { x, y, width, height };
 929
 930    if (x < 0 || y < 0 || width < 0 || height < 0)
 931       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 932
 933    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 934 }
 935
 936 static EGLBoolean
 937 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 938                        EGLint interval)
 939 {
 940    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 941    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 942
 943    if (interval > surf->Config->MaxSwapInterval)
 944       interval = surf->Config->MaxSwapInterval;
 945    else if (interval < surf->Config->MinSwapInterval)
 946       interval = surf->Config->MinSwapInterval;
 947
 948    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 949       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 950
 951    surf->SwapInterval = interval;
 952
 953    return EGL_TRUE;
 954 }
 955
 956 static EGLBoolean
 957 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 958                       void *native_pixmap_target)
 959 {
 960    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 961    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 962    xcb_gcontext_t gc;
 963    xcb_pixmap_t target;
 964
 965    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 966    target = (uintptr_t) native_pixmap_target;
 967
 968    (void) drv;
 969
 970    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 971
 972    gc = xcb_generate_id(dri2_dpy->conn);
 973    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 974    xcb_copy_area(dri2_dpy->conn,
 975                   dri2_surf->drawable,
 976                   target,
 977                   gc,
 978                   0, 0,
 979                   0, 0,
 980                   dri2_surf->base.Width,
 981                   dri2_surf->base.Height);
 982    xcb_free_gc(dri2_dpy->conn, gc);
 983
 984    return EGL_TRUE;
 985 }
 986
 987 static _EGLImage *
 988 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 989                              EGLClientBuffer buffer, const EGLint *attr_list)
 990 {
 991    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 992    struct dri2_egl_image *dri2_img;
 993    unsigned int attachments[1];
 994    xcb_drawable_t drawable;
 995    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 996    xcb_dri2_get_buffers_reply_t *buffers_reply;
 997    xcb_dri2_dri2_buffer_t *buffers;
 998    xcb_get_geometry_cookie_t geometry_cookie;
 999    xcb_get_geometry_reply_t *geometry_reply;
1000    xcb_generic_error_t *error;
1001    int stride, format;
1002
1003    (void) ctx;
1004
1005    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1006    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1007    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1008    buffers_cookie =
1009       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1010                                       drawable, 1, 1, attachments);
1011    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1012    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1013                                                buffers_cookie, NULL);
1014    if (buffers_reply == NULL)
1015      return NULL;
1016
1017    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1018    if (buffers == NULL) {
1019       return NULL;
1020    }
1021
1022    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1023                                             geometry_cookie, &error);
1024    if (geometry_reply == NULL || error != NULL) {
1025       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1026       free(error);
1027       free(buffers_reply);
1028       return NULL;
1029    }
1030
1031    switch (geometry_reply->depth) {
1032    case 16:
1033       format = __DRI_IMAGE_FORMAT_RGB565;
1034       break;
1035    case 24:
1036       format = __DRI_IMAGE_FORMAT_XRGB8888;
1037       break;
1038    case 32:
1039       format = __DRI_IMAGE_FORMAT_ARGB8888;
1040       break;
1041    default:
1042       _eglError(EGL_BAD_PARAMETER,
1043                 "dri2_create_image_khr: unsupported pixmap depth");
1044       free(buffers_reply);
1045       free(geometry_reply);
1046       return NULL;
1047    }
1048
1049    dri2_img = malloc(sizeof *dri2_img);
1050    if (!dri2_img) {
1051       free(buffers_reply);
1052       free(geometry_reply);
1053       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1054       return EGL_NO_IMAGE_KHR;
1055    }
1056
1057    if (!_eglInitImage(&dri2_img->base, disp)) {
1058       free(buffers_reply);
1059       free(geometry_reply);
1060       free(dri2_img);
1061       return EGL_NO_IMAGE_KHR;
1062    }
1063
1064    stride = buffers[0].pitch / buffers[0].cpp;
1065    dri2_img->dri_image =
1066       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1067                                            buffers_reply->width,
1068                                            buffers_reply->height,
1069                                            format,
1070                                            buffers[0].name,
1071                                            stride,
1072                                            dri2_img);
1073
1074    free(buffers_reply);
1075    free(geometry_reply);
1076
1077    return &dri2_img->base;
1078 }
1079
1080 static _EGLImage *
1081 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1082                           _EGLContext *ctx, EGLenum target,
1083                           EGLClientBuffer buffer, const EGLint *attr_list)
1084 {
1085    (void) drv;
1086
1087    switch (target) {
1088    case EGL_NATIVE_PIXMAP_KHR:
1089       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1090    default:
1091       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1092    }
1093 }
1094
1095 static EGLBoolean
1096 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1097                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1098                          EGLuint64KHR *sbc)
1099 {
1100    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1101    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1102    xcb_dri2_get_msc_cookie_t cookie;
1103    xcb_dri2_get_msc_reply_t *reply;
1104
1105    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1106    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1107
1108    if (!reply) {
1109       _eglError(EGL_BAD_ACCESS, __func__);
1110       return EGL_FALSE;
1111    }
1112
1113    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1114    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1115    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1116    free(reply);
1117
1118    return EGL_TRUE;
1119 }
1120
1121 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1122    .authenticate = NULL,
1123    .create_window_surface = dri2_x11_create_window_surface,
1124    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1125    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1126    .destroy_surface = dri2_x11_destroy_surface,
1127    .create_image = dri2_fallback_create_image_khr,
1128    .swap_interval = dri2_fallback_swap_interval,
1129    .swap_buffers = dri2_x11_swap_buffers,
1130    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1131    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1132    .copy_buffers = dri2_x11_copy_buffers,
1133    .query_buffer_age = dri2_fallback_query_buffer_age,
1134    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1135    .get_sync_values = dri2_fallback_get_sync_values,
1136    .get_dri_drawable = dri2_surface_get_dri_drawable,
1137 };
1138
1139 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1140    .authenticate = dri2_x11_authenticate,
1141    .create_window_surface = dri2_x11_create_window_surface,
1142    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1143    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1144    .destroy_surface = dri2_x11_destroy_surface,
1145    .create_image = dri2_x11_create_image_khr,
1146    .swap_interval = dri2_x11_swap_interval,
1147    .swap_buffers = dri2_x11_swap_buffers,
1148    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1149    .swap_buffers_region = dri2_x11_swap_buffers_region,
1150    .post_sub_buffer = dri2_x11_post_sub_buffer,
1151    .copy_buffers = dri2_x11_copy_buffers,
1152    .query_buffer_age = dri2_fallback_query_buffer_age,
1153    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1154    .get_sync_values = dri2_x11_get_sync_values,
1155    .get_dri_drawable = dri2_surface_get_dri_drawable,
1156 };
1157
1158 static EGLBoolean
1159 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1160 {
1161    struct dri2_egl_display *dri2_dpy;
1162
1163    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1164    if (!dri2_dpy)
1165       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1166
1167    disp->DriverData = (void *) dri2_dpy;
1168    if (disp->PlatformDisplay == NULL) {
1169       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1170       dri2_dpy->own_device = true;
1171    } else {
1172       Display *dpy = disp->PlatformDisplay;
1173
1174       dri2_dpy->conn = XGetXCBConnection(dpy);
1175       dri2_dpy->screen = DefaultScreen(dpy);
1176    }
1177
1178    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1179       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1180       goto cleanup_dpy;
1181    }
1182
1183    /*
1184     * Every hardware driver_name is set using strdup. Doing the same in
1185     * here will allow is to simply free the memory at dri2_terminate().
1186     */
1187    dri2_dpy->fd = -1;
1188    dri2_dpy->driver_name = strdup("swrast");
1189    if (!dri2_load_driver_swrast(disp))
1190       goto cleanup_conn;
1191
1192    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1193    dri2_dpy->swrast_loader_extension.base.version = 2;
1194    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1195    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1196    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1197
1198    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1199    dri2_dpy->extensions[1] = NULL;
1200    dri2_dpy->extensions[2] = NULL;
1201
1202    if (!dri2_create_screen(disp))
1203       goto cleanup_driver;
1204
1205    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1206       goto cleanup_configs;
1207
1208    /* Fill vtbl last to prevent accidentally calling virtual function during
1209     * initialization.
1210     */
1211    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1212
1213    return EGL_TRUE;
1214
1215  cleanup_configs:
1216    _eglCleanupDisplay(disp);
1217    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1218  cleanup_driver:
1219    dlclose(dri2_dpy->driver);
1220  cleanup_conn:
1221    free(dri2_dpy->driver_name);
1222    if (disp->PlatformDisplay == NULL)
1223       xcb_disconnect(dri2_dpy->conn);
1224  cleanup_dpy:
1225    free(dri2_dpy);
1226
1227    return EGL_FALSE;
1228 }
1229
1230 static void
1231 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1232 {
1233    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1234    int arbitrary_max_interval = 1000;
1235
1236    /* default behavior for no SwapBuffers support: no vblank syncing
1237     * either.
1238     */
1239    dri2_dpy->min_swap_interval = 0;
1240    dri2_dpy->max_swap_interval = 0;
1241
1242    if (!dri2_dpy->swap_available)
1243       return;
1244
1245    /* If we do have swapbuffers, then we can support pretty much any swap
1246     * interval, but we allow driconf to override applications.
1247     */
1248    if (dri2_dpy->config)
1249       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1250                                      "vblank_mode", &vblank_mode);
1251    switch (vblank_mode) {
1252    case DRI_CONF_VBLANK_NEVER:
1253       dri2_dpy->min_swap_interval = 0;
1254       dri2_dpy->max_swap_interval = 0;
1255       dri2_dpy->default_swap_interval = 0;
1256       break;
1257    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1258       dri2_dpy->min_swap_interval = 1;
1259       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1260       dri2_dpy->default_swap_interval = 1;
1261       break;
1262    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1263       dri2_dpy->min_swap_interval = 0;
1264       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1265       dri2_dpy->default_swap_interval = 0;
1266       break;
1267    default:
1268    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1269       dri2_dpy->min_swap_interval = 0;
1270       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1271       dri2_dpy->default_swap_interval = 1;
1272       break;
1273    }
1274 }
1275
1276 #ifdef HAVE_DRI3
1277 static EGLBoolean
1278 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1279 {
1280    struct dri2_egl_display *dri2_dpy;
1281
1282    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1283    if (!dri2_dpy)
1284       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1285
1286    disp->DriverData = (void *) dri2_dpy;
1287    if (disp->PlatformDisplay == NULL) {
1288       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1289       dri2_dpy->own_device = true;
1290    } else {
1291       Display *dpy = disp->PlatformDisplay;
1292
1293       dri2_dpy->conn = XGetXCBConnection(dpy);
1294       dri2_dpy->screen = DefaultScreen(dpy);
1295    }
1296
1297    if (xcb_connection_has_error(dri2_dpy->conn)) {
1298       _eglLog(_EGL_WARNING, "DRI3: xcb_connect failed");
1299       goto cleanup_dpy;
1300    }
1301
1302    if (dri2_dpy->conn) {
1303       if (!dri3_x11_connect(dri2_dpy))
1304          goto cleanup_conn;
1305    }
1306
1307    if (!dri2_load_driver_dri3(disp))
1308       goto cleanup_conn;
1309
1310    dri2_dpy->extensions[0] = &dri3_image_loader_extension.base;
1311    dri2_dpy->extensions[1] = &use_invalidate.base;
1312    dri2_dpy->extensions[2] = &image_lookup_extension.base;
1313    dri2_dpy->extensions[3] = NULL;
1314
1315    dri2_dpy->swap_available = true;
1316    dri2_dpy->invalidate_available = true;
1317
1318    if (!dri2_create_screen(disp))
1319       goto cleanup_fd;
1320
1321    dri2_x11_setup_swap_interval(dri2_dpy);
1322
1323    if (!dri2_dpy->is_different_gpu)
1324       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1325    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1326    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1327    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1328
1329 #ifdef HAVE_WAYLAND_PLATFORM
1330    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1331 #endif
1332
1333    if (dri2_dpy->conn) {
1334       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1335          goto cleanup_configs;
1336    }
1337
1338    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1339    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1340    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1341    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1342    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1343    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1344
1345    /* Fill vtbl last to prevent accidentally calling virtual function during
1346     * initialization.
1347     */
1348    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1349
1350    _eglLog(_EGL_INFO, "Using DRI3");
1351
1352    return EGL_TRUE;
1353
1354  cleanup_configs:
1355    _eglCleanupDisplay(disp);
1356    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1357    dlclose(dri2_dpy->driver);
1358  cleanup_fd:
1359    close(dri2_dpy->fd);
1360  cleanup_conn:
1361    if (disp->PlatformDisplay == NULL)
1362       xcb_disconnect(dri2_dpy->conn);
1363  cleanup_dpy:
1364    free(dri2_dpy);
1365
1366    return EGL_FALSE;
1367 }
1368 #endif
1369
1370 static EGLBoolean
1371 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1372 {
1373    struct dri2_egl_display *dri2_dpy;
1374
1375    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1376    if (!dri2_dpy)
1377       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1378
1379    disp->DriverData = (void *) dri2_dpy;
1380    if (disp->PlatformDisplay == NULL) {
1381       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1382       dri2_dpy->own_device = true;
1383    } else {
1384       Display *dpy = disp->PlatformDisplay;
1385
1386       dri2_dpy->conn = XGetXCBConnection(dpy);
1387       dri2_dpy->screen = DefaultScreen(dpy);
1388    }
1389
1390    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1391       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1392       goto cleanup_dpy;
1393    }
1394
1395    if (!dri2_x11_connect(dri2_dpy))
1396       goto cleanup_conn;
1397
1398    if (!dri2_load_driver(disp))
1399       goto cleanup_fd;
1400
1401    if (dri2_dpy->dri2_minor >= 1) {
1402       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1403       dri2_dpy->dri2_loader_extension.base.version = 3;
1404       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1405       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1406       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1407          dri2_x11_get_buffers_with_format;
1408    } else {
1409       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1410       dri2_dpy->dri2_loader_extension.base.version = 2;
1411       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1412       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1413       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1414    }
1415
1416    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1417    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1418    dri2_dpy->extensions[2] = NULL;
1419
1420    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1421    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1422
1423    if (!dri2_create_screen(disp))
1424       goto cleanup_driver;
1425
1426    dri2_x11_setup_swap_interval(dri2_dpy);
1427
1428    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1429    disp->Extensions.NOK_swap_region = EGL_TRUE;
1430    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1431    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1432    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1433
1434 #ifdef HAVE_WAYLAND_PLATFORM
1435    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1436 #endif
1437
1438    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1439       goto cleanup_configs;
1440
1441    /* Fill vtbl last to prevent accidentally calling virtual function during
1442     * initialization.
1443     */
1444    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1445
1446    _eglLog(_EGL_INFO, "Using DRI2");
1447
1448    return EGL_TRUE;
1449
1450  cleanup_configs:
1451    _eglCleanupDisplay(disp);
1452    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1453  cleanup_driver:
1454    dlclose(dri2_dpy->driver);
1455  cleanup_fd:
1456    close(dri2_dpy->fd);
1457  cleanup_conn:
1458    if (disp->PlatformDisplay == NULL)
1459       xcb_disconnect(dri2_dpy->conn);
1460  cleanup_dpy:
1461    free(dri2_dpy);
1462
1463    return EGL_FALSE;
1464 }
1465
1466 EGLBoolean
1467 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1468 {
1469    EGLBoolean initialized = EGL_TRUE;
1470
1471    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1472
1473    if (x11_dri2_accel) {
1474 #ifdef HAVE_DRI3
1475       if (getenv("LIBGL_DRI3_DISABLE") != NULL ||
1476           !dri2_initialize_x11_dri3(drv, disp)) {
1477 #endif
1478          if (!dri2_initialize_x11_dri2(drv, disp)) {
1479             initialized = dri2_initialize_x11_swrast(drv, disp);
1480          }
1481 #ifdef HAVE_DRI3
1482       }
1483 #endif
1484    } else {
1485       initialized = dri2_initialize_x11_swrast(drv, disp);
1486    }
1487
1488    return initialized;
1489 }
1490