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 <stdlib.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include <limits.h>
  32 #include <dlfcn.h>
  33 #include <fcntl.h>
  34 #include <errno.h>
  35 #include <unistd.h>
  36 #include <xf86drm.h>
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39
  40 #include "egl_dri2.h"
  41
  42 static void
  43 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  44                      struct dri2_egl_surface * dri2_surf,
  45                      int depth)
  46 {
  47    uint32_t           mask;
  48    const uint32_t     function = GXcopy;
  49    uint32_t           valgc[2];
  50
  51    /* create GC's */
  52    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  53    mask = XCB_GC_FUNCTION;
  54    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  55
  56    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  57    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  58    valgc[0] = function;
  59    valgc[1] = False;
  60    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  61    dri2_surf->depth = depth;
  62    switch (depth) {
  63       case 32:
  64       case 24:
  65          dri2_surf->bytes_per_pixel = 4;
  66          break;
  67       case 16:
  68          dri2_surf->bytes_per_pixel = 2;
  69          break;
  70       case 8:
  71          dri2_surf->bytes_per_pixel = 1;
  72          break;
  73       case 0:
  74          dri2_surf->bytes_per_pixel = 0;
  75          break;
  76       default:
  77          _eglLog(_EGL_WARNING, "unsupported depth %d", depth);
  78    }
  79 }
  80
  81 static void
  82 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  83                       struct dri2_egl_surface * dri2_surf)
  84 {
  85    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  86    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
  87 }
  88
  89 static void
  90 swrastGetDrawableInfo(__DRIdrawable * draw,
  91                       int *x, int *y, int *w, int *h,
  92                       void *loaderPrivate)
  93 {
  94    struct dri2_egl_surface *dri2_surf = loaderPrivate;
  95    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
  96
  97    xcb_get_geometry_cookie_t cookie;
  98    xcb_get_geometry_reply_t *reply;
  99    xcb_generic_error_t *error;
 100
 101    *w = *h = 0;
 102    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 103    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 104    if (reply == NULL)
 105       return;
 106
 107    if (error != NULL) {
 108       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 109       free(error);
 110    } else {
 111       *w = reply->width;
 112       *h = reply->height;
 113    }
 114    free(reply);
 115 }
 116
 117 static void
 118 swrastPutImage(__DRIdrawable * draw, int op,
 119                int x, int y, int w, int h,
 120                char *data, void *loaderPrivate)
 121 {
 122    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 123    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 124
 125    xcb_gcontext_t gc;
 126
 127    switch (op) {
 128    case __DRI_SWRAST_IMAGE_OP_DRAW:
 129       gc = dri2_surf->gc;
 130       break;
 131    case __DRI_SWRAST_IMAGE_OP_SWAP:
 132       gc = dri2_surf->swapgc;
 133       break;
 134    default:
 135       return;
 136    }
 137
 138    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 139                  gc, w, h, x, y, 0, dri2_surf->depth,
 140                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 141 }
 142
 143 static void
 144 swrastGetImage(__DRIdrawable * read,
 145                int x, int y, int w, int h,
 146                char *data, void *loaderPrivate)
 147 {
 148    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 149    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 150
 151    xcb_get_image_cookie_t cookie;
 152    xcb_get_image_reply_t *reply;
 153    xcb_generic_error_t *error;
 154
 155    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 156                            dri2_surf->drawable, x, y, w, h, ~0);
 157    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 158    if (reply == NULL)
 159       return;
 160
 161    if (error != NULL) {
 162       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 163       free(error);
 164    } else {
 165       uint32_t bytes = xcb_get_image_data_length(reply);
 166       uint8_t *idata = xcb_get_image_data(reply);
 167       memcpy(data, idata, bytes);
 168    }
 169    free(reply);
 170 }
 171
 172
 173 /**
 174  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 175  */
 176 static _EGLSurface *
 177 dri2_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 178                     _EGLConfig *conf, EGLNativeWindowType window,
 179                     const EGLint *attrib_list)
 180 {
 181    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 182    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 183    struct dri2_egl_surface *dri2_surf;
 184    xcb_get_geometry_cookie_t cookie;
 185    xcb_get_geometry_reply_t *reply;
 186    xcb_screen_iterator_t s;
 187    xcb_generic_error_t *error;
 188
 189    (void) drv;
 190
 191    dri2_surf = malloc(sizeof *dri2_surf);
 192    if (!dri2_surf) {
 193       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 194       return NULL;
 195    }
 196
 197    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 198       goto cleanup_surf;
 199
 200    dri2_surf->region = XCB_NONE;
 201    if (type == EGL_PBUFFER_BIT) {
 202       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 203       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 204       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 205                         dri2_surf->drawable, s.data->root,
 206                         dri2_surf->base.Width, dri2_surf->base.Height);
 207    } else {
 208       dri2_surf->drawable = window;
 209    }
 210
 211    if (dri2_dpy->dri2) {
 212       dri2_surf->dri_drawable =
 213          (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 214                                                type == EGL_WINDOW_BIT ?
 215                                                dri2_conf->dri_double_config :
 216                                                dri2_conf->dri_single_config,
 217                                                dri2_surf);
 218    } else {
 219       assert(dri2_dpy->swrast);
 220       dri2_surf->dri_drawable =
 221          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 222                                                  dri2_conf->dri_double_config,
 223                                                  dri2_surf);
 224    }
 225
 226    if (dri2_surf->dri_drawable == NULL) {
 227       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 228       goto cleanup_pixmap;
 229    }
 230
 231    if (dri2_dpy->dri2) {
 232       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 233    } else {
 234       swrastCreateDrawable(dri2_dpy, dri2_surf, _eglGetConfigKey(conf, EGL_BUFFER_SIZE));
 235    }
 236
 237    if (type != EGL_PBUFFER_BIT) {
 238       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 239       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 240       if (reply == NULL || error != NULL) {
 241          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 242          free(error);
 243          goto cleanup_dri_drawable;
 244       }
 245
 246       dri2_surf->base.Width = reply->width;
 247       dri2_surf->base.Height = reply->height;
 248       free(reply);
 249    }
 250
 251    return &dri2_surf->base;
 252
 253  cleanup_dri_drawable:
 254    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 255  cleanup_pixmap:
 256    if (type == EGL_PBUFFER_BIT)
 257       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 258  cleanup_surf:
 259    free(dri2_surf);
 260
 261    return NULL;
 262 }
 263
 264 /**
 265  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 266  */
 267 static _EGLSurface *
 268 dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 269                            _EGLConfig *conf, EGLNativeWindowType window,
 270                            const EGLint *attrib_list)
 271 {
 272    return dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 273                               window, attrib_list);
 274 }
 275
 276 static _EGLSurface *
 277 dri2_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 278                            _EGLConfig *conf, EGLNativePixmapType pixmap,
 279                            const EGLint *attrib_list)
 280 {
 281    return dri2_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 282                               pixmap, attrib_list);
 283 }
 284
 285 static _EGLSurface *
 286 dri2_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 287                             _EGLConfig *conf, const EGLint *attrib_list)
 288 {
 289    return dri2_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 290                               XCB_WINDOW_NONE, attrib_list);
 291 }
 292
 293 static EGLBoolean
 294 dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 295 {
 296    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 297    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 298
 299    (void) drv;
 300
 301    if (!_eglPutSurface(surf))
 302       return EGL_TRUE;
 303
 304    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 305
 306    if (dri2_dpy->dri2) {
 307       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 308    } else {
 309       assert(dri2_dpy->swrast);
 310       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 311    }
 312
 313    if (surf->Type == EGL_PBUFFER_BIT)
 314       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 315
 316    free(surf);
 317
 318    return EGL_TRUE;
 319 }
 320
 321 /**
 322  * Process list of buffer received from the server
 323  *
 324  * Processes the list of buffers received in a reply from the server to either
 325  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 326  */
 327 static void
 328 dri2_process_buffers(struct dri2_egl_surface *dri2_surf,
 329                      xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 330 {
 331    struct dri2_egl_display *dri2_dpy =
 332       dri2_egl_display(dri2_surf->base.Resource.Display);
 333    xcb_rectangle_t rectangle;
 334    unsigned i;
 335
 336    dri2_surf->buffer_count = count;
 337    dri2_surf->have_fake_front = 0;
 338
 339    /* This assumes the DRI2 buffer attachment tokens matches the
 340     * __DRIbuffer tokens. */
 341    for (i = 0; i < count; i++) {
 342       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 343       dri2_surf->buffers[i].name = buffers[i].name;
 344       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 345       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 346       dri2_surf->buffers[i].flags = buffers[i].flags;
 347
 348       /* We only use the DRI drivers single buffer configs.  This
 349        * means that if we try to render to a window, DRI2 will give us
 350        * the fake front buffer, which we'll use as a back buffer.
 351        * Note that EGL doesn't require that several clients rendering
 352        * to the same window must see the same aux buffers. */
 353       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 354          dri2_surf->have_fake_front = 1;
 355    }
 356
 357    if (dri2_surf->region != XCB_NONE)
 358       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 359
 360    rectangle.x = 0;
 361    rectangle.y = 0;
 362    rectangle.width = dri2_surf->base.Width;
 363    rectangle.height = dri2_surf->base.Height;
 364    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 365    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 366 }
 367
 368 static __DRIbuffer *
 369 dri2_get_buffers(__DRIdrawable * driDrawable,
 370                 int *width, int *height,
 371                 unsigned int *attachments, int count,
 372                 int *out_count, void *loaderPrivate)
 373 {
 374    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 375    struct dri2_egl_display *dri2_dpy =
 376       dri2_egl_display(dri2_surf->base.Resource.Display);
 377    xcb_dri2_dri2_buffer_t *buffers;
 378    xcb_dri2_get_buffers_reply_t *reply;
 379    xcb_dri2_get_buffers_cookie_t cookie;
 380
 381    (void) driDrawable;
 382
 383    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 384                                             dri2_surf->drawable,
 385                                             count, count, attachments);
 386    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 387    buffers = xcb_dri2_get_buffers_buffers (reply);
 388    if (buffers == NULL)
 389       return NULL;
 390
 391    *out_count = reply->count;
 392    dri2_surf->base.Width = *width = reply->width;
 393    dri2_surf->base.Height = *height = reply->height;
 394    dri2_process_buffers(dri2_surf, buffers, *out_count);
 395
 396    free(reply);
 397
 398    return dri2_surf->buffers;
 399 }
 400
 401 static __DRIbuffer *
 402 dri2_get_buffers_with_format(__DRIdrawable * driDrawable,
 403                              int *width, int *height,
 404                              unsigned int *attachments, int count,
 405                              int *out_count, void *loaderPrivate)
 406 {
 407    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 408    struct dri2_egl_display *dri2_dpy =
 409       dri2_egl_display(dri2_surf->base.Resource.Display);
 410    xcb_dri2_dri2_buffer_t *buffers;
 411    xcb_dri2_get_buffers_with_format_reply_t *reply;
 412    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 413    xcb_dri2_attach_format_t *format_attachments;
 414
 415    (void) driDrawable;
 416
 417    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 418    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 419                                                         dri2_surf->drawable,
 420                                                         count, count,
 421                                                         format_attachments);
 422
 423    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 424                                                    cookie, NULL);
 425    if (reply == NULL)
 426       return NULL;
 427
 428    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 429    dri2_surf->base.Width = *width = reply->width;
 430    dri2_surf->base.Height = *height = reply->height;
 431    *out_count = reply->count;
 432    dri2_process_buffers(dri2_surf, buffers, *out_count);
 433
 434    free(reply);
 435
 436    return dri2_surf->buffers;
 437 }
 438
 439 static void
 440 dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 441 {
 442    (void) driDrawable;
 443
 444    /* FIXME: Does EGL support front buffer rendering at all? */
 445
 446 #if 0
 447    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 448
 449    dri2WaitGL(dri2_surf);
 450 #else
 451    (void) loaderPrivate;
 452 #endif
 453 }
 454
 455 static char *
 456 dri2_strndup(const char *s, int length)
 457 {
 458    char *d;
 459
 460    d = malloc(length + 1);
 461    if (d == NULL)
 462       return NULL;
 463
 464    memcpy(d, s, length);
 465    d[length] = '\0';
 466
 467    return d;
 468 }
 469
 470 static EGLBoolean
 471 dri2_connect(struct dri2_egl_display *dri2_dpy)
 472 {
 473    xcb_xfixes_query_version_reply_t *xfixes_query;
 474    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 475    xcb_dri2_query_version_reply_t *dri2_query;
 476    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 477    xcb_dri2_connect_reply_t *connect;
 478    xcb_dri2_connect_cookie_t connect_cookie;
 479    xcb_generic_error_t *error;
 480    xcb_screen_iterator_t s;
 481    char *driver_name, *device_name;
 482    const xcb_query_extension_reply_t *extension;
 483
 484    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 485    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 486
 487    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 488    if (!(extension && extension->present))
 489       return EGL_FALSE;
 490
 491    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 492    if (!(extension && extension->present))
 493       return EGL_FALSE;
 494
 495    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 496                                                   XCB_XFIXES_MAJOR_VERSION,
 497                                                   XCB_XFIXES_MINOR_VERSION);
 498
 499    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 500                                                XCB_DRI2_MAJOR_VERSION,
 501                                                XCB_DRI2_MINOR_VERSION);
 502
 503    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 504    connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
 505                                                 s.data->root,
 506                                                 XCB_DRI2_DRIVER_TYPE_DRI);
 507
 508    xfixes_query =
 509       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 510                                       xfixes_query_cookie, &error);
 511    if (xfixes_query == NULL ||
 512        error != NULL || xfixes_query->major_version < 2) {
 513       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 514       free(error);
 515       return EGL_FALSE;
 516    }
 517    free(xfixes_query);
 518
 519    dri2_query =
 520       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 521    if (dri2_query == NULL || error != NULL) {
 522       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 523       free(error);
 524       return EGL_FALSE;
 525    }
 526    dri2_dpy->dri2_major = dri2_query->major_version;
 527    dri2_dpy->dri2_minor = dri2_query->minor_version;
 528    free(dri2_query);
 529
 530    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 531    if (connect == NULL ||
 532        connect->driver_name_length + connect->device_name_length == 0) {
 533       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 534       return EGL_FALSE;
 535    }
 536
 537    driver_name = xcb_dri2_connect_driver_name (connect);
 538    dri2_dpy->driver_name =
 539       dri2_strndup(driver_name,
 540                    xcb_dri2_connect_driver_name_length (connect));
 541
 542 #if XCB_DRI2_CONNECT_DEVICE_NAME_BROKEN
 543    device_name = driver_name + ((connect->driver_name_length + 3) & ~3);
 544 #else
 545    device_name = xcb_dri2_connect_device_name (connect);
 546 #endif
 547
 548    dri2_dpy->device_name =
 549       dri2_strndup(device_name,
 550                    xcb_dri2_connect_device_name_length (connect));
 551
 552    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 553       free(dri2_dpy->device_name);
 554       free(dri2_dpy->driver_name);
 555       free(connect);
 556       return EGL_FALSE;
 557    }
 558    free(connect);
 559
 560    return EGL_TRUE;
 561 }
 562
 563 static int
 564 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 565 {
 566    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 567    xcb_dri2_authenticate_reply_t *authenticate;
 568    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 569    xcb_screen_iterator_t s;
 570    int ret = 0;
 571
 572    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 573    authenticate_cookie =
 574       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, s.data->root, id);
 575    authenticate =
 576       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 577
 578    if (authenticate == NULL || !authenticate->authenticated)
 579       ret = -1;
 580
 581    if (authenticate)
 582       free(authenticate);
 583
 584    return ret;
 585 }
 586
 587 static EGLBoolean
 588 dri2_authenticate(_EGLDisplay *disp)
 589 {
 590    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 591    drm_magic_t magic;
 592
 593    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 594       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 595       return EGL_FALSE;
 596    }
 597
 598    if (dri2_x11_authenticate(disp, magic) < 0) {
 599       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 600       return EGL_FALSE;
 601    }
 602
 603    return EGL_TRUE;
 604 }
 605
 606 static EGLBoolean
 607 dri2_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 608                              _EGLDisplay *disp)
 609 {
 610    xcb_screen_iterator_t s;
 611    xcb_depth_iterator_t d;
 612    xcb_visualtype_t *visuals;
 613    int i, j, id;
 614    EGLint surface_type;
 615    EGLint config_attrs[] = {
 616            EGL_NATIVE_VISUAL_ID,   0,
 617            EGL_NATIVE_VISUAL_TYPE, 0,
 618            EGL_NONE
 619    };
 620
 621    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 622    d = xcb_screen_allowed_depths_iterator(s.data);
 623    id = 1;
 624
 625    surface_type =
 626       EGL_WINDOW_BIT |
 627       EGL_PIXMAP_BIT |
 628       EGL_PBUFFER_BIT |
 629       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 630
 631    while (d.rem > 0) {
 632       EGLBoolean class_added[6] = { 0, };
 633
 634       visuals = xcb_depth_visuals(d.data);
 635       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 636          if (class_added[visuals[i]._class])
 637             continue;
 638
 639          class_added[visuals[i]._class] = EGL_TRUE;
 640          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 641             config_attrs[1] = visuals[i].visual_id;
 642             config_attrs[3] = visuals[i]._class;
 643
 644             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 645                             d.data->depth, surface_type, config_attrs);
 646          }
 647       }
 648
 649       xcb_depth_next(&d);
 650    }
 651
 652    if (!_eglGetArraySize(disp->Configs)) {
 653       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 654       return EGL_FALSE;
 655    }
 656
 657    return EGL_TRUE;
 658 }
 659
 660 static EGLBoolean
 661 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 662                  _EGLSurface *draw, xcb_xfixes_region_t region)
 663 {
 664    struct dri2_egl_driver *dri2_drv = dri2_egl_driver(drv);
 665    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 666    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 667    _EGLContext *ctx;
 668    enum xcb_dri2_attachment_t render_attachment;
 669    xcb_dri2_copy_region_cookie_t cookie;
 670
 671    if (dri2_drv->glFlush) {
 672       ctx = _eglGetCurrentContext();
 673       if (ctx && ctx->DrawSurface == &dri2_surf->base)
 674          dri2_drv->glFlush();
 675    }
 676
 677    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 678
 679 #if 0
 680    /* FIXME: Add support for dri swapbuffers, that'll give us swap
 681     * interval and page flipping (at least for fullscreen windows) as
 682     * well as the page flip event.  Unless surface->SwapBehavior is
 683     * EGL_BUFFER_PRESERVED. */
 684 #if __DRI2_FLUSH_VERSION >= 2
 685    if (pdraw->psc->f)
 686       (*pdraw->psc->f->flushInvalidate)(pdraw->driDrawable);
 687 #endif
 688 #endif
 689
 690    if (dri2_surf->have_fake_front)
 691       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 692    else
 693       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 694
 695    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 696                                            dri2_surf->drawable,
 697                                            region,
 698                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 699                                            render_attachment);
 700    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 701
 702    return EGL_TRUE;
 703 }
 704
 705 static EGLBoolean
 706 dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 707 {
 708    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 709    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 710
 711    if (dri2_dpy->dri2) {
 712       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 713    } else {
 714       assert(dri2_dpy->swrast);
 715
 716       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 717       return EGL_TRUE;
 718    }
 719 }
 720
 721 static EGLBoolean
 722 dri2_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 723                          EGLint numRects, const EGLint *rects)
 724 {
 725    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 726    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 727    EGLBoolean ret;
 728    xcb_xfixes_region_t region;
 729    xcb_rectangle_t rectangles[16];
 730    int i;
 731
 732    if (numRects > (int)ARRAY_SIZE(rectangles))
 733       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 734
 735    /* FIXME: Invert y here? */
 736    for (i = 0; i < numRects; i++) {
 737       rectangles[i].x = rects[i * 4];
 738       rectangles[i].y = rects[i * 4 + 1];
 739       rectangles[i].width = rects[i * 4 + 2];
 740       rectangles[i].height = rects[i * 4 + 3];
 741    }
 742
 743    region = xcb_generate_id(dri2_dpy->conn);
 744    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 745    ret = dri2_copy_region(drv, disp, draw, region);
 746    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 747
 748    return ret;
 749 }
 750
 751 static EGLBoolean
 752 dri2_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 753                   EGLNativePixmapType target)
 754 {
 755    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 756    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 757    xcb_gcontext_t gc;
 758
 759    (void) drv;
 760
 761    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 762
 763    gc = xcb_generate_id(dri2_dpy->conn);
 764    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 765    xcb_copy_area(dri2_dpy->conn,
 766                   dri2_surf->drawable,
 767                   target,
 768                   gc,
 769                   0, 0,
 770                   0, 0,
 771                   dri2_surf->base.Width,
 772                   dri2_surf->base.Height);
 773    xcb_free_gc(dri2_dpy->conn, gc);
 774
 775    return EGL_TRUE;
 776 }
 777
 778 static _EGLImage *
 779 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 780                              EGLClientBuffer buffer, const EGLint *attr_list)
 781 {
 782    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 783    struct dri2_egl_image *dri2_img;
 784    unsigned int attachments[1];
 785    xcb_drawable_t drawable;
 786    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 787    xcb_dri2_get_buffers_reply_t *buffers_reply;
 788    xcb_dri2_dri2_buffer_t *buffers;
 789    xcb_get_geometry_cookie_t geometry_cookie;
 790    xcb_get_geometry_reply_t *geometry_reply;
 791    xcb_generic_error_t *error;
 792    int stride, format;
 793
 794    (void) ctx;
 795
 796    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 797    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 798    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 799    buffers_cookie =
 800       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 801                                       drawable, 1, 1, attachments);
 802    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 803    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 804                                                buffers_cookie, NULL);
 805    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 806    if (buffers == NULL) {
 807       return NULL;
 808    }
 809
 810    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 811                                             geometry_cookie, &error);
 812    if (geometry_reply == NULL || error != NULL) {
 813       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 814       free(error);
 815       free(buffers_reply);
 816       return NULL;
 817    }
 818
 819    switch (geometry_reply->depth) {
 820    case 16:
 821       format = __DRI_IMAGE_FORMAT_RGB565;
 822       break;
 823    case 24:
 824       format = __DRI_IMAGE_FORMAT_XRGB8888;
 825       break;
 826    case 32:
 827       format = __DRI_IMAGE_FORMAT_ARGB8888;
 828       break;
 829    default:
 830       _eglError(EGL_BAD_PARAMETER,
 831                 "dri2_create_image_khr: unsupported pixmap depth");
 832       free(buffers_reply);
 833       free(geometry_reply);
 834       return NULL;
 835    }
 836
 837    dri2_img = malloc(sizeof *dri2_img);
 838    if (!dri2_img) {
 839       free(buffers_reply);
 840       free(geometry_reply);
 841       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
 842       return EGL_NO_IMAGE_KHR;
 843    }
 844
 845    if (!_eglInitImage(&dri2_img->base, disp)) {
 846       free(buffers_reply);
 847       free(geometry_reply);
 848       free(dri2_img);
 849       return EGL_NO_IMAGE_KHR;
 850    }
 851
 852    stride = buffers[0].pitch / buffers[0].cpp;
 853    dri2_img->dri_image =
 854       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
 855                                            buffers_reply->width,
 856                                            buffers_reply->height,
 857                                            format,
 858                                            buffers[0].name,
 859                                            stride,
 860                                            dri2_img);
 861
 862    free(buffers_reply);
 863    free(geometry_reply);
 864
 865    return &dri2_img->base;
 866 }
 867
 868 static _EGLImage *
 869 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 870                           _EGLContext *ctx, EGLenum target,
 871                           EGLClientBuffer buffer, const EGLint *attr_list)
 872 {
 873    (void) drv;
 874
 875    switch (target) {
 876    case EGL_NATIVE_PIXMAP_KHR:
 877       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 878    default:
 879       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 880    }
 881 }
 882
 883 static EGLBoolean
 884 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
 885 {
 886    struct dri2_egl_display *dri2_dpy;
 887
 888    drv->API.CreateWindowSurface = dri2_create_window_surface;
 889    drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
 890    drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
 891    drv->API.DestroySurface = dri2_destroy_surface;
 892    drv->API.SwapBuffers = dri2_swap_buffers;
 893    drv->API.CopyBuffers = dri2_copy_buffers;
 894
 895    drv->API.SwapBuffersRegionNOK = NULL;
 896    drv->API.CreateImageKHR  = NULL;
 897    drv->API.DestroyImageKHR = NULL;
 898    drv->API.CreateDRMImageMESA = NULL;
 899    drv->API.ExportDRMImageMESA = NULL;
 900
 901    dri2_dpy = malloc(sizeof *dri2_dpy);
 902    if (!dri2_dpy)
 903       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 904
 905    memset(dri2_dpy, 0, sizeof *dri2_dpy);
 906
 907    disp->DriverData = (void *) dri2_dpy;
 908    if (disp->PlatformDisplay == NULL) {
 909       dri2_dpy->conn = xcb_connect(0, 0);
 910    } else {
 911       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
 912    }
 913
 914    if (xcb_connection_has_error(dri2_dpy->conn)) {
 915       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
 916       goto cleanup_dpy;
 917    }
 918
 919    if (!dri2_load_driver_swrast(disp))
 920       goto cleanup_conn;
 921
 922    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
 923    dri2_dpy->swrast_loader_extension.base.version = __DRI_SWRAST_LOADER_VERSION;
 924    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
 925    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
 926    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
 927
 928    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
 929    dri2_dpy->extensions[1] = NULL;
 930    dri2_dpy->extensions[2] = NULL;
 931
 932    if (!dri2_create_screen(disp))
 933       goto cleanup_driver;
 934
 935    if (dri2_dpy->conn) {
 936       if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
 937          goto cleanup_configs;
 938    }
 939
 940    /* we're supporting EGL 1.4 */
 941    disp->VersionMajor = 1;
 942    disp->VersionMinor = 4;
 943
 944    return EGL_TRUE;
 945
 946  cleanup_configs:
 947    _eglCleanupDisplay(disp);
 948    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
 949  cleanup_driver:
 950    dlclose(dri2_dpy->driver);
 951  cleanup_conn:
 952    if (disp->PlatformDisplay == NULL)
 953       xcb_disconnect(dri2_dpy->conn);
 954  cleanup_dpy:
 955    free(dri2_dpy);
 956
 957    return EGL_FALSE;
 958 }
 959
 960
 961 static EGLBoolean
 962 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
 963 {
 964    struct dri2_egl_display *dri2_dpy;
 965
 966    drv->API.CreateWindowSurface = dri2_create_window_surface;
 967    drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
 968    drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
 969    drv->API.DestroySurface = dri2_destroy_surface;
 970    drv->API.SwapBuffers = dri2_swap_buffers;
 971    drv->API.CopyBuffers = dri2_copy_buffers;
 972    drv->API.CreateImageKHR = dri2_x11_create_image_khr;
 973    drv->API.SwapBuffersRegionNOK = dri2_swap_buffers_region;
 974
 975    dri2_dpy = malloc(sizeof *dri2_dpy);
 976    if (!dri2_dpy)
 977       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 978
 979    memset(dri2_dpy, 0, sizeof *dri2_dpy);
 980
 981    disp->DriverData = (void *) dri2_dpy;
 982    if (disp->PlatformDisplay == NULL) {
 983       dri2_dpy->conn = xcb_connect(0, 0);
 984    } else {
 985       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
 986    }
 987
 988    if (xcb_connection_has_error(dri2_dpy->conn)) {
 989       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
 990       goto cleanup_dpy;
 991    }
 992
 993    if (dri2_dpy->conn) {
 994       if (!dri2_connect(dri2_dpy))
 995          goto cleanup_conn;
 996    }
 997
 998    if (!dri2_load_driver(disp))
 999       goto cleanup_conn;
1000
1001    dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR | O_CLOEXEC);
1002    if (dri2_dpy->fd == -1) {
1003       _eglLog(_EGL_WARNING,
1004               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
1005               strerror(errno));
1006       goto cleanup_driver;
1007    }
1008
1009    if (dri2_dpy->conn) {
1010       if (!dri2_authenticate(disp))
1011          goto cleanup_fd;
1012    }
1013
1014    if (dri2_dpy->dri2_minor >= 1) {
1015       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1016       dri2_dpy->dri2_loader_extension.base.version = 3;
1017       dri2_dpy->dri2_loader_extension.getBuffers = dri2_get_buffers;
1018       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
1019       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1020          dri2_get_buffers_with_format;
1021    } else {
1022       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1023       dri2_dpy->dri2_loader_extension.base.version = 2;
1024       dri2_dpy->dri2_loader_extension.getBuffers = dri2_get_buffers;
1025       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
1026       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1027    }
1028
1029    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1030    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1031    dri2_dpy->extensions[2] = NULL;
1032
1033    if (!dri2_create_screen(disp))
1034       goto cleanup_fd;
1035
1036    if (dri2_dpy->conn) {
1037       if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
1038          goto cleanup_configs;
1039    }
1040
1041    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1042    disp->Extensions.NOK_swap_region = EGL_TRUE;
1043    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1044
1045 #ifdef HAVE_WAYLAND_PLATFORM
1046    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1047 #endif
1048    dri2_dpy->authenticate = dri2_x11_authenticate;
1049
1050    /* we're supporting EGL 1.4 */
1051    disp->VersionMajor = 1;
1052    disp->VersionMinor = 4;
1053
1054    return EGL_TRUE;
1055
1056  cleanup_configs:
1057    _eglCleanupDisplay(disp);
1058    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1059  cleanup_fd:
1060    close(dri2_dpy->fd);
1061  cleanup_driver:
1062    dlclose(dri2_dpy->driver);
1063  cleanup_conn:
1064    if (disp->PlatformDisplay == NULL)
1065       xcb_disconnect(dri2_dpy->conn);
1066  cleanup_dpy:
1067    free(dri2_dpy);
1068
1069    return EGL_FALSE;
1070 }
1071
1072 EGLBoolean
1073 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1074 {
1075    EGLBoolean initialized = EGL_TRUE;
1076
1077    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1078
1079    if (x11_dri2_accel) {
1080       if (!dri2_initialize_x11_dri2(drv, disp)) {
1081          initialized = dri2_initialize_x11_swrast(drv, disp);
1082       }
1083    } else {
1084       initialized = dri2_initialize_x11_swrast(drv, disp);
1085    }
1086
1087    return initialized;
1088 }
1089