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    /* we always copy the back buffer to front */
 252    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 253
 254    return &dri2_surf->base;
 255
 256  cleanup_dri_drawable:
 257    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 258  cleanup_pixmap:
 259    if (type == EGL_PBUFFER_BIT)
 260       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 261  cleanup_surf:
 262    free(dri2_surf);
 263
 264    return NULL;
 265 }
 266
 267 /**
 268  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 269  */
 270 static _EGLSurface *
 271 dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 272                            _EGLConfig *conf, EGLNativeWindowType window,
 273                            const EGLint *attrib_list)
 274 {
 275    return dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 276                               window, attrib_list);
 277 }
 278
 279 static _EGLSurface *
 280 dri2_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 281                            _EGLConfig *conf, EGLNativePixmapType pixmap,
 282                            const EGLint *attrib_list)
 283 {
 284    return dri2_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 285                               pixmap, attrib_list);
 286 }
 287
 288 static _EGLSurface *
 289 dri2_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 290                             _EGLConfig *conf, const EGLint *attrib_list)
 291 {
 292    return dri2_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 293                               XCB_WINDOW_NONE, attrib_list);
 294 }
 295
 296 static EGLBoolean
 297 dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 298 {
 299    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 300    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 301
 302    (void) drv;
 303
 304    if (!_eglPutSurface(surf))
 305       return EGL_TRUE;
 306
 307    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 308
 309    if (dri2_dpy->dri2) {
 310       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 311    } else {
 312       assert(dri2_dpy->swrast);
 313       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 314    }
 315
 316    if (surf->Type == EGL_PBUFFER_BIT)
 317       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 318
 319    free(surf);
 320
 321    return EGL_TRUE;
 322 }
 323
 324 /**
 325  * Process list of buffer received from the server
 326  *
 327  * Processes the list of buffers received in a reply from the server to either
 328  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 329  */
 330 static void
 331 dri2_process_buffers(struct dri2_egl_surface *dri2_surf,
 332                      xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 333 {
 334    struct dri2_egl_display *dri2_dpy =
 335       dri2_egl_display(dri2_surf->base.Resource.Display);
 336    xcb_rectangle_t rectangle;
 337    unsigned i;
 338
 339    dri2_surf->buffer_count = count;
 340    dri2_surf->have_fake_front = 0;
 341
 342    /* This assumes the DRI2 buffer attachment tokens matches the
 343     * __DRIbuffer tokens. */
 344    for (i = 0; i < count; i++) {
 345       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 346       dri2_surf->buffers[i].name = buffers[i].name;
 347       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 348       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 349       dri2_surf->buffers[i].flags = buffers[i].flags;
 350
 351       /* We only use the DRI drivers single buffer configs.  This
 352        * means that if we try to render to a window, DRI2 will give us
 353        * the fake front buffer, which we'll use as a back buffer.
 354        * Note that EGL doesn't require that several clients rendering
 355        * to the same window must see the same aux buffers. */
 356       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 357          dri2_surf->have_fake_front = 1;
 358    }
 359
 360    if (dri2_surf->region != XCB_NONE)
 361       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 362
 363    rectangle.x = 0;
 364    rectangle.y = 0;
 365    rectangle.width = dri2_surf->base.Width;
 366    rectangle.height = dri2_surf->base.Height;
 367    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 368    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 369 }
 370
 371 static __DRIbuffer *
 372 dri2_get_buffers(__DRIdrawable * driDrawable,
 373                 int *width, int *height,
 374                 unsigned int *attachments, int count,
 375                 int *out_count, void *loaderPrivate)
 376 {
 377    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 378    struct dri2_egl_display *dri2_dpy =
 379       dri2_egl_display(dri2_surf->base.Resource.Display);
 380    xcb_dri2_dri2_buffer_t *buffers;
 381    xcb_dri2_get_buffers_reply_t *reply;
 382    xcb_dri2_get_buffers_cookie_t cookie;
 383
 384    (void) driDrawable;
 385
 386    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 387                                             dri2_surf->drawable,
 388                                             count, count, attachments);
 389    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 390    buffers = xcb_dri2_get_buffers_buffers (reply);
 391    if (buffers == NULL)
 392       return NULL;
 393
 394    *out_count = reply->count;
 395    dri2_surf->base.Width = *width = reply->width;
 396    dri2_surf->base.Height = *height = reply->height;
 397    dri2_process_buffers(dri2_surf, buffers, *out_count);
 398
 399    free(reply);
 400
 401    return dri2_surf->buffers;
 402 }
 403
 404 static __DRIbuffer *
 405 dri2_get_buffers_with_format(__DRIdrawable * driDrawable,
 406                              int *width, int *height,
 407                              unsigned int *attachments, int count,
 408                              int *out_count, void *loaderPrivate)
 409 {
 410    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 411    struct dri2_egl_display *dri2_dpy =
 412       dri2_egl_display(dri2_surf->base.Resource.Display);
 413    xcb_dri2_dri2_buffer_t *buffers;
 414    xcb_dri2_get_buffers_with_format_reply_t *reply;
 415    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 416    xcb_dri2_attach_format_t *format_attachments;
 417
 418    (void) driDrawable;
 419
 420    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 421    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 422                                                         dri2_surf->drawable,
 423                                                         count, count,
 424                                                         format_attachments);
 425
 426    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 427                                                    cookie, NULL);
 428    if (reply == NULL)
 429       return NULL;
 430
 431    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 432    dri2_surf->base.Width = *width = reply->width;
 433    dri2_surf->base.Height = *height = reply->height;
 434    *out_count = reply->count;
 435    dri2_process_buffers(dri2_surf, buffers, *out_count);
 436
 437    free(reply);
 438
 439    return dri2_surf->buffers;
 440 }
 441
 442 static void
 443 dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 444 {
 445    (void) driDrawable;
 446
 447    /* FIXME: Does EGL support front buffer rendering at all? */
 448
 449 #if 0
 450    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 451
 452    dri2WaitGL(dri2_surf);
 453 #else
 454    (void) loaderPrivate;
 455 #endif
 456 }
 457
 458 static char *
 459 dri2_strndup(const char *s, int length)
 460 {
 461    char *d;
 462
 463    d = malloc(length + 1);
 464    if (d == NULL)
 465       return NULL;
 466
 467    memcpy(d, s, length);
 468    d[length] = '\0';
 469
 470    return d;
 471 }
 472
 473 static EGLBoolean
 474 dri2_connect(struct dri2_egl_display *dri2_dpy)
 475 {
 476    xcb_xfixes_query_version_reply_t *xfixes_query;
 477    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 478    xcb_dri2_query_version_reply_t *dri2_query;
 479    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 480    xcb_dri2_connect_reply_t *connect;
 481    xcb_dri2_connect_cookie_t connect_cookie;
 482    xcb_generic_error_t *error;
 483    xcb_screen_iterator_t s;
 484    char *driver_name, *device_name;
 485    const xcb_query_extension_reply_t *extension;
 486
 487    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 488    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 489
 490    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 491    if (!(extension && extension->present))
 492       return EGL_FALSE;
 493
 494    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 495    if (!(extension && extension->present))
 496       return EGL_FALSE;
 497
 498    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 499                                                   XCB_XFIXES_MAJOR_VERSION,
 500                                                   XCB_XFIXES_MINOR_VERSION);
 501
 502    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 503                                                XCB_DRI2_MAJOR_VERSION,
 504                                                XCB_DRI2_MINOR_VERSION);
 505
 506    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 507    connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
 508                                                 s.data->root,
 509                                                 XCB_DRI2_DRIVER_TYPE_DRI);
 510
 511    xfixes_query =
 512       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 513                                       xfixes_query_cookie, &error);
 514    if (xfixes_query == NULL ||
 515        error != NULL || xfixes_query->major_version < 2) {
 516       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 517       free(error);
 518       return EGL_FALSE;
 519    }
 520    free(xfixes_query);
 521
 522    dri2_query =
 523       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 524    if (dri2_query == NULL || error != NULL) {
 525       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 526       free(error);
 527       return EGL_FALSE;
 528    }
 529    dri2_dpy->dri2_major = dri2_query->major_version;
 530    dri2_dpy->dri2_minor = dri2_query->minor_version;
 531    free(dri2_query);
 532
 533    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 534    if (connect == NULL ||
 535        connect->driver_name_length + connect->device_name_length == 0) {
 536       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 537       return EGL_FALSE;
 538    }
 539
 540    driver_name = xcb_dri2_connect_driver_name (connect);
 541    dri2_dpy->driver_name =
 542       dri2_strndup(driver_name,
 543                    xcb_dri2_connect_driver_name_length (connect));
 544
 545 #if XCB_DRI2_CONNECT_DEVICE_NAME_BROKEN
 546    device_name = driver_name + ((connect->driver_name_length + 3) & ~3);
 547 #else
 548    device_name = xcb_dri2_connect_device_name (connect);
 549 #endif
 550
 551    dri2_dpy->device_name =
 552       dri2_strndup(device_name,
 553                    xcb_dri2_connect_device_name_length (connect));
 554
 555    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 556       free(dri2_dpy->device_name);
 557       free(dri2_dpy->driver_name);
 558       free(connect);
 559       return EGL_FALSE;
 560    }
 561    free(connect);
 562
 563    return EGL_TRUE;
 564 }
 565
 566 static int
 567 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 568 {
 569    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 570    xcb_dri2_authenticate_reply_t *authenticate;
 571    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 572    xcb_screen_iterator_t s;
 573    int ret = 0;
 574
 575    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 576    authenticate_cookie =
 577       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, s.data->root, id);
 578    authenticate =
 579       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 580
 581    if (authenticate == NULL || !authenticate->authenticated)
 582       ret = -1;
 583
 584    if (authenticate)
 585       free(authenticate);
 586
 587    return ret;
 588 }
 589
 590 static EGLBoolean
 591 dri2_authenticate(_EGLDisplay *disp)
 592 {
 593    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 594    drm_magic_t magic;
 595
 596    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 597       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 598       return EGL_FALSE;
 599    }
 600
 601    if (dri2_x11_authenticate(disp, magic) < 0) {
 602       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 603       return EGL_FALSE;
 604    }
 605
 606    return EGL_TRUE;
 607 }
 608
 609 static EGLBoolean
 610 dri2_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 611                              _EGLDisplay *disp)
 612 {
 613    xcb_screen_iterator_t s;
 614    xcb_depth_iterator_t d;
 615    xcb_visualtype_t *visuals;
 616    int i, j, id;
 617    EGLint surface_type;
 618    EGLint config_attrs[] = {
 619            EGL_NATIVE_VISUAL_ID,   0,
 620            EGL_NATIVE_VISUAL_TYPE, 0,
 621            EGL_NONE
 622    };
 623
 624    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 625    d = xcb_screen_allowed_depths_iterator(s.data);
 626    id = 1;
 627
 628    surface_type =
 629       EGL_WINDOW_BIT |
 630       EGL_PIXMAP_BIT |
 631       EGL_PBUFFER_BIT |
 632       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 633
 634    while (d.rem > 0) {
 635       EGLBoolean class_added[6] = { 0, };
 636
 637       visuals = xcb_depth_visuals(d.data);
 638       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 639          if (class_added[visuals[i]._class])
 640             continue;
 641
 642          class_added[visuals[i]._class] = EGL_TRUE;
 643          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 644             config_attrs[1] = visuals[i].visual_id;
 645             config_attrs[3] = visuals[i]._class;
 646
 647             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 648                             d.data->depth, surface_type, config_attrs, NULL);
 649          }
 650       }
 651
 652       xcb_depth_next(&d);
 653    }
 654
 655    if (!_eglGetArraySize(disp->Configs)) {
 656       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 657       return EGL_FALSE;
 658    }
 659
 660    return EGL_TRUE;
 661 }
 662
 663 static EGLBoolean
 664 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 665                  _EGLSurface *draw, xcb_xfixes_region_t region)
 666 {
 667    struct dri2_egl_driver *dri2_drv = dri2_egl_driver(drv);
 668    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 669    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 670    _EGLContext *ctx;
 671    enum xcb_dri2_attachment_t render_attachment;
 672    xcb_dri2_copy_region_cookie_t cookie;
 673
 674    if (dri2_drv->glFlush) {
 675       ctx = _eglGetCurrentContext();
 676       if (ctx && ctx->DrawSurface == &dri2_surf->base)
 677          dri2_drv->glFlush();
 678    }
 679
 680    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 681
 682 #if 0
 683    /* FIXME: Add support for dri swapbuffers, that'll give us swap
 684     * interval and page flipping (at least for fullscreen windows) as
 685     * well as the page flip event.  Unless surface->SwapBehavior is
 686     * EGL_BUFFER_PRESERVED. */
 687 #if __DRI2_FLUSH_VERSION >= 2
 688    if (pdraw->psc->f)
 689       (*pdraw->psc->f->flushInvalidate)(pdraw->driDrawable);
 690 #endif
 691 #endif
 692
 693    if (dri2_surf->have_fake_front)
 694       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 695    else
 696       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 697
 698    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 699                                            dri2_surf->drawable,
 700                                            region,
 701                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 702                                            render_attachment);
 703    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 704
 705    return EGL_TRUE;
 706 }
 707
 708 static EGLBoolean
 709 dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 710 {
 711    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 712    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 713
 714    if (dri2_dpy->dri2) {
 715       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 716    } else {
 717       assert(dri2_dpy->swrast);
 718
 719       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 720       return EGL_TRUE;
 721    }
 722 }
 723
 724 static EGLBoolean
 725 dri2_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 726                          EGLint numRects, const EGLint *rects)
 727 {
 728    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 729    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 730    EGLBoolean ret;
 731    xcb_xfixes_region_t region;
 732    xcb_rectangle_t rectangles[16];
 733    int i;
 734
 735    if (numRects > (int)ARRAY_SIZE(rectangles))
 736       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 737
 738    /* FIXME: Invert y here? */
 739    for (i = 0; i < numRects; i++) {
 740       rectangles[i].x = rects[i * 4];
 741       rectangles[i].y = rects[i * 4 + 1];
 742       rectangles[i].width = rects[i * 4 + 2];
 743       rectangles[i].height = rects[i * 4 + 3];
 744    }
 745
 746    region = xcb_generate_id(dri2_dpy->conn);
 747    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 748    ret = dri2_copy_region(drv, disp, draw, region);
 749    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 750
 751    return ret;
 752 }
 753
 754 static EGLBoolean
 755 dri2_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 756                      EGLint x, EGLint y, EGLint width, EGLint height)
 757 {
 758    const EGLint rect[4] = { x, draw->Height - y - height, width, height };
 759
 760    if (x < 0 || y < 0 || width < 0 || height < 0)
 761       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 762
 763    return dri2_swap_buffers_region(drv, disp, draw, 1, rect);
 764 }
 765
 766 static EGLBoolean
 767 dri2_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf, EGLint interval)
 768 {
 769 #if XCB_DRI2_MINOR_VERSION >= 3
 770    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 771    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 772
 773    /* XXX Check vblank_mode here? */
 774
 775    if (interval > surf->Config->MaxSwapInterval)
 776       interval = surf->Config->MaxSwapInterval;
 777    else if (interval < surf->Config->MinSwapInterval)
 778       interval = surf->Config->MinSwapInterval;
 779
 780    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 781       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 782
 783    surf->SwapInterval = interval;
 784
 785    return EGL_TRUE;
 786 #else
 787    return EGL_FALSE;
 788 #endif
 789 }
 790
 791 static EGLBoolean
 792 dri2_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 793                   EGLNativePixmapType target)
 794 {
 795    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 796    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 797    xcb_gcontext_t gc;
 798
 799    (void) drv;
 800
 801    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 802
 803    gc = xcb_generate_id(dri2_dpy->conn);
 804    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 805    xcb_copy_area(dri2_dpy->conn,
 806                   dri2_surf->drawable,
 807                   target,
 808                   gc,
 809                   0, 0,
 810                   0, 0,
 811                   dri2_surf->base.Width,
 812                   dri2_surf->base.Height);
 813    xcb_free_gc(dri2_dpy->conn, gc);
 814
 815    return EGL_TRUE;
 816 }
 817
 818 static _EGLImage *
 819 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 820                              EGLClientBuffer buffer, const EGLint *attr_list)
 821 {
 822    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 823    struct dri2_egl_image *dri2_img;
 824    unsigned int attachments[1];
 825    xcb_drawable_t drawable;
 826    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 827    xcb_dri2_get_buffers_reply_t *buffers_reply;
 828    xcb_dri2_dri2_buffer_t *buffers;
 829    xcb_get_geometry_cookie_t geometry_cookie;
 830    xcb_get_geometry_reply_t *geometry_reply;
 831    xcb_generic_error_t *error;
 832    int stride, format;
 833
 834    (void) ctx;
 835
 836    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 837    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 838    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 839    buffers_cookie =
 840       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 841                                       drawable, 1, 1, attachments);
 842    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 843    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 844                                                buffers_cookie, NULL);
 845    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 846    if (buffers == NULL) {
 847       return NULL;
 848    }
 849
 850    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 851                                             geometry_cookie, &error);
 852    if (geometry_reply == NULL || error != NULL) {
 853       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 854       free(error);
 855       free(buffers_reply);
 856       return NULL;
 857    }
 858
 859    switch (geometry_reply->depth) {
 860    case 16:
 861       format = __DRI_IMAGE_FORMAT_RGB565;
 862       break;
 863    case 24:
 864       format = __DRI_IMAGE_FORMAT_XRGB8888;
 865       break;
 866    case 32:
 867       format = __DRI_IMAGE_FORMAT_ARGB8888;
 868       break;
 869    default:
 870       _eglError(EGL_BAD_PARAMETER,
 871                 "dri2_create_image_khr: unsupported pixmap depth");
 872       free(buffers_reply);
 873       free(geometry_reply);
 874       return NULL;
 875    }
 876
 877    dri2_img = malloc(sizeof *dri2_img);
 878    if (!dri2_img) {
 879       free(buffers_reply);
 880       free(geometry_reply);
 881       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
 882       return EGL_NO_IMAGE_KHR;
 883    }
 884
 885    if (!_eglInitImage(&dri2_img->base, disp)) {
 886       free(buffers_reply);
 887       free(geometry_reply);
 888       free(dri2_img);
 889       return EGL_NO_IMAGE_KHR;
 890    }
 891
 892    stride = buffers[0].pitch / buffers[0].cpp;
 893    dri2_img->dri_image =
 894       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
 895                                            buffers_reply->width,
 896                                            buffers_reply->height,
 897                                            format,
 898                                            buffers[0].name,
 899                                            stride,
 900                                            dri2_img);
 901
 902    free(buffers_reply);
 903    free(geometry_reply);
 904
 905    return &dri2_img->base;
 906 }
 907
 908 static _EGLImage *
 909 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 910                           _EGLContext *ctx, EGLenum target,
 911                           EGLClientBuffer buffer, const EGLint *attr_list)
 912 {
 913    (void) drv;
 914
 915    switch (target) {
 916    case EGL_NATIVE_PIXMAP_KHR:
 917       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 918    default:
 919       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 920    }
 921 }
 922
 923 static EGLBoolean
 924 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
 925 {
 926    struct dri2_egl_display *dri2_dpy;
 927
 928    drv->API.CreateWindowSurface = dri2_create_window_surface;
 929    drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
 930    drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
 931    drv->API.DestroySurface = dri2_destroy_surface;
 932    drv->API.SwapBuffers = dri2_swap_buffers;
 933    drv->API.CopyBuffers = dri2_copy_buffers;
 934
 935    drv->API.SwapBuffersRegionNOK = NULL;
 936    drv->API.CreateImageKHR  = NULL;
 937    drv->API.DestroyImageKHR = NULL;
 938    drv->API.CreateDRMImageMESA = NULL;
 939    drv->API.ExportDRMImageMESA = NULL;
 940
 941    dri2_dpy = malloc(sizeof *dri2_dpy);
 942    if (!dri2_dpy)
 943       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 944
 945    memset(dri2_dpy, 0, sizeof *dri2_dpy);
 946
 947    disp->DriverData = (void *) dri2_dpy;
 948    if (disp->PlatformDisplay == NULL) {
 949       dri2_dpy->conn = xcb_connect(0, 0);
 950    } else {
 951       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
 952    }
 953
 954    if (xcb_connection_has_error(dri2_dpy->conn)) {
 955       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
 956       goto cleanup_dpy;
 957    }
 958
 959    if (!dri2_load_driver_swrast(disp))
 960       goto cleanup_conn;
 961
 962    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
 963    dri2_dpy->swrast_loader_extension.base.version = __DRI_SWRAST_LOADER_VERSION;
 964    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
 965    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
 966    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
 967
 968    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
 969    dri2_dpy->extensions[1] = NULL;
 970    dri2_dpy->extensions[2] = NULL;
 971
 972    if (!dri2_create_screen(disp))
 973       goto cleanup_driver;
 974
 975    if (dri2_dpy->conn) {
 976       if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
 977          goto cleanup_configs;
 978    }
 979
 980    /* we're supporting EGL 1.4 */
 981    disp->VersionMajor = 1;
 982    disp->VersionMinor = 4;
 983
 984    return EGL_TRUE;
 985
 986  cleanup_configs:
 987    _eglCleanupDisplay(disp);
 988    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
 989  cleanup_driver:
 990    dlclose(dri2_dpy->driver);
 991  cleanup_conn:
 992    if (disp->PlatformDisplay == NULL)
 993       xcb_disconnect(dri2_dpy->conn);
 994  cleanup_dpy:
 995    free(dri2_dpy);
 996
 997    return EGL_FALSE;
 998 }
 999
1000
1001 static EGLBoolean
1002 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1003 {
1004    struct dri2_egl_display *dri2_dpy;
1005
1006    drv->API.CreateWindowSurface = dri2_create_window_surface;
1007    drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
1008    drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
1009    drv->API.DestroySurface = dri2_destroy_surface;
1010    drv->API.SwapBuffers = dri2_swap_buffers;
1011    drv->API.CopyBuffers = dri2_copy_buffers;
1012    drv->API.CreateImageKHR = dri2_x11_create_image_khr;
1013    drv->API.SwapBuffersRegionNOK = dri2_swap_buffers_region;
1014    drv->API.PostSubBufferNV = dri2_post_sub_buffer;
1015    drv->API.SwapInterval = dri2_swap_interval;
1016
1017    dri2_dpy = malloc(sizeof *dri2_dpy);
1018    if (!dri2_dpy)
1019       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1020
1021    memset(dri2_dpy, 0, sizeof *dri2_dpy);
1022
1023    disp->DriverData = (void *) dri2_dpy;
1024    if (disp->PlatformDisplay == NULL) {
1025       dri2_dpy->conn = xcb_connect(0, 0);
1026    } else {
1027       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1028    }
1029
1030    if (xcb_connection_has_error(dri2_dpy->conn)) {
1031       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1032       goto cleanup_dpy;
1033    }
1034
1035    if (dri2_dpy->conn) {
1036       if (!dri2_connect(dri2_dpy))
1037          goto cleanup_conn;
1038    }
1039
1040    if (!dri2_load_driver(disp))
1041       goto cleanup_conn;
1042
1043    dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR | O_CLOEXEC);
1044    if (dri2_dpy->fd == -1) {
1045       _eglLog(_EGL_WARNING,
1046               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
1047               strerror(errno));
1048       goto cleanup_driver;
1049    }
1050
1051    if (dri2_dpy->conn) {
1052       if (!dri2_authenticate(disp))
1053          goto cleanup_fd;
1054    }
1055
1056    if (dri2_dpy->dri2_minor >= 1) {
1057       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1058       dri2_dpy->dri2_loader_extension.base.version = 3;
1059       dri2_dpy->dri2_loader_extension.getBuffers = dri2_get_buffers;
1060       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
1061       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1062          dri2_get_buffers_with_format;
1063    } else {
1064       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1065       dri2_dpy->dri2_loader_extension.base.version = 2;
1066       dri2_dpy->dri2_loader_extension.getBuffers = dri2_get_buffers;
1067       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
1068       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1069    }
1070
1071    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1072    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1073    dri2_dpy->extensions[2] = NULL;
1074
1075    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1076
1077    if (!dri2_create_screen(disp))
1078       goto cleanup_fd;
1079
1080    if (dri2_dpy->conn) {
1081       if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
1082          goto cleanup_configs;
1083    }
1084
1085    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1086    disp->Extensions.NOK_swap_region = EGL_TRUE;
1087    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1088    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1089
1090 #ifdef HAVE_WAYLAND_PLATFORM
1091    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1092 #endif
1093    dri2_dpy->authenticate = dri2_x11_authenticate;
1094
1095    /* we're supporting EGL 1.4 */
1096    disp->VersionMajor = 1;
1097    disp->VersionMinor = 4;
1098
1099    return EGL_TRUE;
1100
1101  cleanup_configs:
1102    _eglCleanupDisplay(disp);
1103    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1104  cleanup_fd:
1105    close(dri2_dpy->fd);
1106  cleanup_driver:
1107    dlclose(dri2_dpy->driver);
1108  cleanup_conn:
1109    if (disp->PlatformDisplay == NULL)
1110       xcb_disconnect(dri2_dpy->conn);
1111  cleanup_dpy:
1112    free(dri2_dpy);
1113
1114    return EGL_FALSE;
1115 }
1116
1117 EGLBoolean
1118 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1119 {
1120    EGLBoolean initialized = EGL_TRUE;
1121
1122    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1123
1124    if (x11_dri2_accel) {
1125       if (!dri2_initialize_x11_dri2(drv, disp)) {
1126          initialized = dri2_initialize_x11_swrast(drv, disp);
1127       }
1128    } else {
1129       initialized = dri2_initialize_x11_swrast(drv, disp);
1130    }
1131
1132    return initialized;
1133 }
1134