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 #include "util/debug.h"
  44 #include "util/macros.h"
  45
  46 #include "egl_dri2.h"
  47 #include "egl_dri2_fallbacks.h"
  48 #include "loader.h"
  49
  50 #ifdef HAVE_DRI3
  51 #include "platform_x11_dri3.h"
  52 #endif
  53
  54 static EGLBoolean
  55 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  56                        EGLint interval);
  57
  58 uint32_t
  59 dri2_format_for_depth(struct dri2_egl_display *dri2_dpy, uint32_t depth);
  60
  61 static void
  62 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  63                      struct dri2_egl_surface * dri2_surf)
  64 {
  65    uint32_t           mask;
  66    const uint32_t     function = GXcopy;
  67    uint32_t           valgc[2];
  68
  69    /* create GC's */
  70    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  71    mask = XCB_GC_FUNCTION;
  72    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  73
  74    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  75    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  76    valgc[0] = function;
  77    valgc[1] = False;
  78    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  79    switch (dri2_surf->depth) {
  80       case 32:
  81       case 30:
  82       case 24:
  83          dri2_surf->bytes_per_pixel = 4;
  84          break;
  85       case 16:
  86          dri2_surf->bytes_per_pixel = 2;
  87          break;
  88       case 8:
  89          dri2_surf->bytes_per_pixel = 1;
  90          break;
  91       case 0:
  92          dri2_surf->bytes_per_pixel = 0;
  93          break;
  94       default:
  95          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  96    }
  97 }
  98
  99 static void
 100 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
 101                       struct dri2_egl_surface * dri2_surf)
 102 {
 103    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
 104    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 105 }
 106
 107 static bool
 108 x11_get_drawable_info(__DRIdrawable * draw,
 109                       int *x, int *y, int *w, int *h,
 110                       void *loaderPrivate)
 111 {
 112    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 113    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 114
 115    xcb_get_geometry_cookie_t cookie;
 116    xcb_get_geometry_reply_t *reply;
 117    xcb_generic_error_t *error;
 118    bool ret;
 119
 120    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 121    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 122    if (reply == NULL)
 123       return false;
 124
 125    if (error != NULL) {
 126       ret = false;
 127       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 128       free(error);
 129    } else {
 130       *x = reply->x;
 131       *y = reply->y;
 132       *w = reply->width;
 133       *h = reply->height;
 134       ret = true;
 135    }
 136    free(reply);
 137    return ret;
 138 }
 139
 140 static void
 141 swrastGetDrawableInfo(__DRIdrawable * draw,
 142                       int *x, int *y, int *w, int *h,
 143                       void *loaderPrivate)
 144 {
 145    *x = *y = *w = *h = 0;
 146    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 147 }
 148
 149 static void
 150 swrastPutImage(__DRIdrawable * draw, int op,
 151                int x, int y, int w, int h,
 152                char *data, void *loaderPrivate)
 153 {
 154    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 155    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 156
 157    xcb_gcontext_t gc;
 158
 159    switch (op) {
 160    case __DRI_SWRAST_IMAGE_OP_DRAW:
 161       gc = dri2_surf->gc;
 162       break;
 163    case __DRI_SWRAST_IMAGE_OP_SWAP:
 164       gc = dri2_surf->swapgc;
 165       break;
 166    default:
 167       return;
 168    }
 169
 170    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 171                  gc, w, h, x, y, 0, dri2_surf->depth,
 172                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 173 }
 174
 175 static void
 176 swrastGetImage(__DRIdrawable * read,
 177                int x, int y, int w, int h,
 178                char *data, void *loaderPrivate)
 179 {
 180    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 181    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 182
 183    xcb_get_image_cookie_t cookie;
 184    xcb_get_image_reply_t *reply;
 185    xcb_generic_error_t *error;
 186
 187    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 188                            dri2_surf->drawable, x, y, w, h, ~0);
 189    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 190    if (reply == NULL)
 191       return;
 192
 193    if (error != NULL) {
 194       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 195       free(error);
 196    } else {
 197       uint32_t bytes = xcb_get_image_data_length(reply);
 198       uint8_t *idata = xcb_get_image_data(reply);
 199       memcpy(data, idata, bytes);
 200    }
 201    free(reply);
 202 }
 203
 204
 205 static xcb_screen_t *
 206 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 207 {
 208     for (; iter.rem; --screen, xcb_screen_next(&iter))
 209         if (screen == 0)
 210             return iter.data;
 211
 212     return NULL;
 213 }
 214
 215 static xcb_visualtype_t *
 216 get_xcb_visualtype_for_depth(struct dri2_egl_display *dri2_dpy, int depth)
 217 {
 218    xcb_visualtype_iterator_t visual_iter;
 219    xcb_screen_t *screen = dri2_dpy->screen;
 220    xcb_depth_iterator_t depth_iter = xcb_screen_allowed_depths_iterator(screen);
 221
 222    for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
 223       if (depth_iter.data->depth != depth)
 224          continue;
 225
 226       visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
 227       if (visual_iter.rem)
 228          return visual_iter.data;
 229    }
 230
 231    return NULL;
 232 }
 233
 234 /* Get red channel mask for given depth. */
 235 unsigned int
 236 dri2_x11_get_red_mask_for_depth(struct dri2_egl_display *dri2_dpy, int depth)
 237 {
 238    xcb_visualtype_t *visual = get_xcb_visualtype_for_depth(dri2_dpy, depth);
 239
 240    if (visual)
 241       return visual->red_mask;
 242
 243    return 0;
 244 }
 245
 246 /**
 247  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 248  */
 249 static _EGLSurface *
 250 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 251                         _EGLConfig *conf, void *native_surface,
 252                         const EGLint *attrib_list)
 253 {
 254    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 255    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 256    struct dri2_egl_surface *dri2_surf;
 257    xcb_get_geometry_cookie_t cookie;
 258    xcb_get_geometry_reply_t *reply;
 259    xcb_generic_error_t *error;
 260    const __DRIconfig *config;
 261
 262    (void) drv;
 263
 264    dri2_surf = calloc(1, sizeof *dri2_surf);
 265    if (!dri2_surf) {
 266       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 267       return NULL;
 268    }
 269
 270    if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list,
 271                           false, native_surface))
 272       goto cleanup_surf;
 273
 274    dri2_surf->region = XCB_NONE;
 275    if (type == EGL_PBUFFER_BIT) {
 276       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 277       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 278                        dri2_surf->drawable, dri2_dpy->screen->root,
 279                         dri2_surf->base.Width, dri2_surf->base.Height);
 280    } else {
 281       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 282       dri2_surf->drawable = (uintptr_t) native_surface;
 283    }
 284
 285    config = dri2_get_dri_config(dri2_conf, type,
 286                                 dri2_surf->base.GLColorspace);
 287
 288    if (!config) {
 289       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 290       goto cleanup_pixmap;
 291    }
 292
 293    if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf))
 294       goto cleanup_pixmap;
 295
 296    if (type != EGL_PBUFFER_BIT) {
 297       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 298       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 299       if (error != NULL) {
 300          if (error->error_code == BadAlloc)
 301             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 302          else if (type == EGL_WINDOW_BIT)
 303             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 304          else
 305             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 306          free(error);
 307          goto cleanup_dri_drawable;
 308       } else if (reply == NULL) {
 309          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 310          goto cleanup_dri_drawable;
 311       }
 312
 313       dri2_surf->base.Width = reply->width;
 314       dri2_surf->base.Height = reply->height;
 315       dri2_surf->depth = reply->depth;
 316       free(reply);
 317    }
 318
 319    if (dri2_dpy->dri2) {
 320       xcb_void_cookie_t cookie;
 321       int conn_error;
 322
 323       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 324                                                 dri2_surf->drawable);
 325       error = xcb_request_check(dri2_dpy->conn, cookie);
 326       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 327       if (conn_error || error != NULL) {
 328          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 329             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 330          else if (type == EGL_WINDOW_BIT)
 331             _eglError(EGL_BAD_NATIVE_WINDOW,
 332                       "xcb_dri2_create_drawable_checked");
 333          else
 334             _eglError(EGL_BAD_NATIVE_PIXMAP,
 335                       "xcb_dri2_create_drawable_checked");
 336          free(error);
 337          goto cleanup_dri_drawable;
 338       }
 339    } else {
 340       if (type == EGL_PBUFFER_BIT) {
 341          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 342       }
 343       swrastCreateDrawable(dri2_dpy, dri2_surf);
 344    }
 345
 346    /* we always copy the back buffer to front */
 347    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 348
 349    return &dri2_surf->base;
 350
 351  cleanup_dri_drawable:
 352    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 353  cleanup_pixmap:
 354    if (type == EGL_PBUFFER_BIT)
 355       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 356  cleanup_surf:
 357    free(dri2_surf);
 358
 359    return NULL;
 360 }
 361
 362 /**
 363  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 364  */
 365 static _EGLSurface *
 366 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 367                                _EGLConfig *conf, void *native_window,
 368                                const EGLint *attrib_list)
 369 {
 370    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 371    _EGLSurface *surf;
 372
 373    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 374                                   native_window, attrib_list);
 375    if (surf != NULL) {
 376       /* When we first create the DRI2 drawable, its swap interval on the
 377        * server side is 1.
 378        */
 379       surf->SwapInterval = 1;
 380
 381       /* Override that with a driconf-set value. */
 382       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 383    }
 384
 385    return surf;
 386 }
 387
 388 static _EGLSurface *
 389 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 390                                _EGLConfig *conf, void *native_pixmap,
 391                                const EGLint *attrib_list)
 392 {
 393    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 394                                   native_pixmap, attrib_list);
 395 }
 396
 397 static _EGLSurface *
 398 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 399                                 _EGLConfig *conf, const EGLint *attrib_list)
 400 {
 401    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 402                                   NULL, attrib_list);
 403 }
 404
 405 static EGLBoolean
 406 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 407 {
 408    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 409    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 410
 411    (void) drv;
 412
 413    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 414
 415    if (dri2_dpy->dri2) {
 416       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 417    } else {
 418       assert(dri2_dpy->swrast);
 419       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 420    }
 421
 422    if (surf->Type == EGL_PBUFFER_BIT)
 423       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 424
 425    dri2_fini_surface(surf);
 426    free(surf);
 427
 428    return EGL_TRUE;
 429 }
 430
 431 /**
 432  * Function utilizes swrastGetDrawableInfo to get surface
 433  * geometry from x server and calls default query surface
 434  * implementation that returns the updated values.
 435  *
 436  * In case of errors we still return values that we currently
 437  * have.
 438  */
 439 static EGLBoolean
 440 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *disp,
 441                    _EGLSurface *surf, EGLint attribute,
 442                    EGLint *value)
 443 {
 444    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 445    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 446    int x, y, w, h;
 447
 448    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 449
 450    switch (attribute) {
 451    case EGL_WIDTH:
 452    case EGL_HEIGHT:
 453       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 454          surf->Width = w;
 455          surf->Height = h;
 456       }
 457       break;
 458    default:
 459       break;
 460    }
 461    return _eglQuerySurface(drv, disp, surf, attribute, value);
 462 }
 463
 464 /**
 465  * Process list of buffer received from the server
 466  *
 467  * Processes the list of buffers received in a reply from the server to either
 468  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 469  */
 470 static void
 471 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 472                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 473 {
 474    struct dri2_egl_display *dri2_dpy =
 475       dri2_egl_display(dri2_surf->base.Resource.Display);
 476    xcb_rectangle_t rectangle;
 477
 478    dri2_surf->have_fake_front = false;
 479
 480    /* This assumes the DRI2 buffer attachment tokens matches the
 481     * __DRIbuffer tokens. */
 482    for (unsigned i = 0; i < count; i++) {
 483       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 484       dri2_surf->buffers[i].name = buffers[i].name;
 485       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 486       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 487       dri2_surf->buffers[i].flags = buffers[i].flags;
 488
 489       /* We only use the DRI drivers single buffer configs.  This
 490        * means that if we try to render to a window, DRI2 will give us
 491        * the fake front buffer, which we'll use as a back buffer.
 492        * Note that EGL doesn't require that several clients rendering
 493        * to the same window must see the same aux buffers. */
 494       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 495          dri2_surf->have_fake_front = true;
 496    }
 497
 498    if (dri2_surf->region != XCB_NONE)
 499       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 500
 501    rectangle.x = 0;
 502    rectangle.y = 0;
 503    rectangle.width = dri2_surf->base.Width;
 504    rectangle.height = dri2_surf->base.Height;
 505    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 506    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 507 }
 508
 509 static __DRIbuffer *
 510 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 511                      int *width, int *height,
 512                      unsigned int *attachments, int count,
 513                      int *out_count, void *loaderPrivate)
 514 {
 515    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 516    struct dri2_egl_display *dri2_dpy =
 517       dri2_egl_display(dri2_surf->base.Resource.Display);
 518    xcb_dri2_dri2_buffer_t *buffers;
 519    xcb_dri2_get_buffers_reply_t *reply;
 520    xcb_dri2_get_buffers_cookie_t cookie;
 521
 522    (void) driDrawable;
 523
 524    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 525                                             dri2_surf->drawable,
 526                                             count, count, attachments);
 527    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 528    if (reply == NULL)
 529       return NULL;
 530    buffers = xcb_dri2_get_buffers_buffers (reply);
 531    if (buffers == NULL)
 532       return NULL;
 533
 534    *out_count = reply->count;
 535    dri2_surf->base.Width = *width = reply->width;
 536    dri2_surf->base.Height = *height = reply->height;
 537    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 538
 539    free(reply);
 540
 541    return dri2_surf->buffers;
 542 }
 543
 544 static __DRIbuffer *
 545 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 546                                  int *width, int *height,
 547                                  unsigned int *attachments, int count,
 548                                  int *out_count, void *loaderPrivate)
 549 {
 550    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 551    struct dri2_egl_display *dri2_dpy =
 552       dri2_egl_display(dri2_surf->base.Resource.Display);
 553    xcb_dri2_dri2_buffer_t *buffers;
 554    xcb_dri2_get_buffers_with_format_reply_t *reply;
 555    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 556    xcb_dri2_attach_format_t *format_attachments;
 557
 558    (void) driDrawable;
 559
 560    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 561    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 562                                                         dri2_surf->drawable,
 563                                                         count, count,
 564                                                         format_attachments);
 565
 566    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 567                                                    cookie, NULL);
 568    if (reply == NULL)
 569       return NULL;
 570
 571    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 572    dri2_surf->base.Width = *width = reply->width;
 573    dri2_surf->base.Height = *height = reply->height;
 574    *out_count = reply->count;
 575    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 576
 577    free(reply);
 578
 579    return dri2_surf->buffers;
 580 }
 581
 582 static void
 583 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 584 {
 585    (void) driDrawable;
 586
 587    /* FIXME: Does EGL support front buffer rendering at all? */
 588
 589 #if 0
 590    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 591
 592    dri2WaitGL(dri2_surf);
 593 #else
 594    (void) loaderPrivate;
 595 #endif
 596 }
 597
 598 static int
 599 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 600 {
 601    xcb_dri2_authenticate_reply_t *authenticate;
 602    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 603    int ret = 0;
 604
 605    authenticate_cookie =
 606       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 607    authenticate =
 608       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 609
 610    if (authenticate == NULL || !authenticate->authenticated)
 611       ret = -1;
 612
 613    free(authenticate);
 614
 615    return ret;
 616 }
 617
 618 static EGLBoolean
 619 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 620 {
 621 #ifdef HAVE_LIBDRM
 622    drm_magic_t magic;
 623
 624    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 625       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 626       return EGL_FALSE;
 627    }
 628
 629    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 630       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 631       return EGL_FALSE;
 632    }
 633 #endif
 634    return EGL_TRUE;
 635 }
 636
 637 static EGLBoolean
 638 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 639 {
 640    xcb_xfixes_query_version_reply_t *xfixes_query;
 641    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 642    xcb_dri2_query_version_reply_t *dri2_query;
 643    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 644    xcb_dri2_connect_reply_t *connect;
 645    xcb_dri2_connect_cookie_t connect_cookie;
 646    xcb_generic_error_t *error;
 647    char *driver_name, *loader_driver_name, *device_name;
 648    const xcb_query_extension_reply_t *extension;
 649
 650    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 651    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 652
 653    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 654    if (!(extension && extension->present))
 655       return EGL_FALSE;
 656
 657    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 658    if (!(extension && extension->present))
 659       return EGL_FALSE;
 660
 661    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 662                                                   XCB_XFIXES_MAJOR_VERSION,
 663                                                   XCB_XFIXES_MINOR_VERSION);
 664
 665    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 666                                                XCB_DRI2_MAJOR_VERSION,
 667                                                XCB_DRI2_MINOR_VERSION);
 668
 669    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 670                                    XCB_DRI2_DRIVER_TYPE_DRI);
 671
 672    xfixes_query =
 673       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 674                                       xfixes_query_cookie, &error);
 675    if (xfixes_query == NULL ||
 676        error != NULL || xfixes_query->major_version < 2) {
 677       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 678       free(error);
 679       free(xfixes_query);
 680       return EGL_FALSE;
 681    }
 682    free(xfixes_query);
 683
 684    dri2_query =
 685       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 686    if (dri2_query == NULL || error != NULL) {
 687       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 688       free(error);
 689       return EGL_FALSE;
 690    }
 691    dri2_dpy->dri2_major = dri2_query->major_version;
 692    dri2_dpy->dri2_minor = dri2_query->minor_version;
 693    free(dri2_query);
 694
 695    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 696    if (connect == NULL ||
 697        connect->driver_name_length + connect->device_name_length == 0) {
 698       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 699       return EGL_FALSE;
 700    }
 701
 702    device_name = xcb_dri2_connect_device_name (connect);
 703
 704    dri2_dpy->fd = loader_open_device(device_name);
 705    if (dri2_dpy->fd == -1) {
 706       _eglLog(_EGL_WARNING,
 707               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 708       free(connect);
 709       return EGL_FALSE;
 710    }
 711
 712    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 713       close(dri2_dpy->fd);
 714       free(connect);
 715       return EGL_FALSE;
 716    }
 717
 718    driver_name = xcb_dri2_connect_driver_name (connect);
 719
 720    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 721     * Otherwise, default to the server's value.
 722     */
 723    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 724    if (loader_driver_name) {
 725       dri2_dpy->driver_name = loader_driver_name;
 726    } else {
 727       dri2_dpy->driver_name =
 728          strndup(driver_name,
 729                  xcb_dri2_connect_driver_name_length(connect));
 730    }
 731
 732    if (dri2_dpy->driver_name == NULL) {
 733       close(dri2_dpy->fd);
 734       free(connect);
 735       return EGL_FALSE;
 736    }
 737
 738 #ifdef HAVE_WAYLAND_PLATFORM
 739    dri2_dpy->device_name =
 740       strndup(device_name,
 741               xcb_dri2_connect_device_name_length(connect));
 742 #endif
 743
 744    free(connect);
 745
 746    return EGL_TRUE;
 747 }
 748
 749 static int
 750 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 751 {
 752    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 753
 754    return dri2_x11_do_authenticate(dri2_dpy, id);
 755 }
 756
 757 static bool
 758 dri2_x11_config_match_attrib(struct dri2_egl_display *dri2_dpy,
 759                              const __DRIconfig *config,
 760                              unsigned int attrib,
 761                              unsigned int value)
 762 {
 763    uint32_t config_val;
 764    if (!dri2_dpy->core->getConfigAttrib(config, attrib, &config_val))
 765       return false;
 766    return config_val == value;
 767 }
 768
 769 /**
 770  * See if the X server can export a pixmap with the given color depth.
 771  *
 772  * Glamor in xorg-server 1.20 can't export pixmaps which have a different
 773  * color depth than the root window as a DRI image.  This makes it impossible
 774  * to expose pbuffer-only visuals with, say, 16bpp on a 24bpp X display.
 775  */
 776 static bool
 777 x11_can_export_pixmap_with_bpp(struct dri2_egl_display *dri2_dpy, int bpp)
 778 {
 779    bool supported = false;
 780
 781 #ifdef HAVE_DRI3
 782    xcb_dri3_buffer_from_pixmap_cookie_t cookie;
 783    xcb_dri3_buffer_from_pixmap_reply_t *reply;
 784
 785    xcb_pixmap_t pixmap = xcb_generate_id(dri2_dpy->conn);
 786    xcb_create_pixmap(dri2_dpy->conn, bpp, pixmap, dri2_dpy->screen->root, 1, 1);
 787    cookie = xcb_dri3_buffer_from_pixmap(dri2_dpy->conn, pixmap);
 788    reply = xcb_dri3_buffer_from_pixmap_reply(dri2_dpy->conn, cookie, NULL);
 789
 790    if (reply) {
 791       int *fds = xcb_dri3_buffer_from_pixmap_reply_fds(dri2_dpy->conn, reply);
 792
 793       for (int i = 0; i < reply->nfd; i++) {
 794          close(fds[i]);
 795       }
 796
 797       supported = true;
 798
 799       free(reply);
 800    }
 801
 802    xcb_free_pixmap(dri2_dpy->conn, pixmap);
 803 #endif
 804
 805    return supported;
 806 }
 807
 808 static EGLBoolean
 809 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 810                                  _EGLDisplay *disp, bool supports_preserved,
 811                                  bool add_pbuffer_configs)
 812 {
 813    xcb_depth_iterator_t d;
 814    xcb_visualtype_t *visuals;
 815    int config_count = 0;
 816    EGLint surface_type;
 817
 818    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 819
 820    surface_type =
 821       EGL_WINDOW_BIT |
 822       EGL_PIXMAP_BIT |
 823       EGL_PBUFFER_BIT;
 824
 825    if (supports_preserved)
 826       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 827
 828    while (d.rem > 0) {
 829       EGLBoolean class_added[6] = { 0, };
 830
 831       visuals = xcb_depth_visuals(d.data);
 832
 833       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 834          if (class_added[visuals[i]._class])
 835             continue;
 836
 837          class_added[visuals[i]._class] = EGL_TRUE;
 838
 839          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 840             struct dri2_egl_config *dri2_conf;
 841             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 842
 843             const EGLint config_attrs[] = {
 844                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 845                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 846                     EGL_NONE
 847             };
 848
 849             unsigned int rgba_masks[4] = {
 850                visuals[i].red_mask,
 851                visuals[i].green_mask,
 852                visuals[i].blue_mask,
 853                0,
 854             };
 855
 856             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 857                                         surface_type, config_attrs,
 858                                         rgba_masks);
 859             if (dri2_conf)
 860                if (dri2_conf->base.ConfigID == config_count + 1)
 861                   config_count++;
 862
 863             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 864              * Ditto for 30-bit RGB visuals to match a 32-bit RGBA EGLConfig.
 865              * Otherwise it will only match a 32-bit RGBA visual.  On a
 866              * composited window manager on X11, this will make all of the
 867              * EGLConfigs with destination alpha get blended by the
 868              * compositor.  This is probably not what the application
 869              * wants... especially on drivers that only have 32-bit RGBA
 870              * EGLConfigs! */
 871             if (d.data->depth == 24 || d.data->depth == 30) {
 872                rgba_masks[3] =
 873                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 874                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 875                                            surface_type, config_attrs,
 876                                            rgba_masks);
 877                if (dri2_conf)
 878                   if (dri2_conf->base.ConfigID == config_count + 1)
 879                      config_count++;
 880             }
 881          }
 882       }
 883
 884       xcb_depth_next(&d);
 885    }
 886
 887    /* Add a 565-no-depth-no-stencil pbuffer-only config.  If X11 is depth 24,
 888     * we wouldn't have 565 available, which the CTS demands.
 889     */
 890    if (add_pbuffer_configs && x11_can_export_pixmap_with_bpp(dri2_dpy, 16)) {
 891       for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 892          const __DRIconfig *config = dri2_dpy->driver_configs[j];
 893          const EGLint config_attrs[] = {
 894             EGL_NATIVE_VISUAL_ID,    0,
 895             EGL_NATIVE_VISUAL_TYPE,  EGL_NONE,
 896             EGL_NONE
 897          };
 898          EGLint surface_type = EGL_PBUFFER_BIT;
 899          unsigned int rgba_masks[4] = {
 900             0x1f << 11,
 901             0x3f << 5,
 902             0x1f << 0,
 903             0,
 904          };
 905
 906          /* Check that we've found single-sample, no depth, no stencil,
 907           * and single-buffered.
 908           */
 909          if (!dri2_x11_config_match_attrib(dri2_dpy, config,
 910                                            __DRI_ATTRIB_DEPTH_SIZE, 0) ||
 911              !dri2_x11_config_match_attrib(dri2_dpy, config,
 912                                            __DRI_ATTRIB_STENCIL_SIZE, 0) ||
 913              !dri2_x11_config_match_attrib(dri2_dpy, config,
 914                                            __DRI_ATTRIB_SAMPLES, 0) ||
 915              !dri2_x11_config_match_attrib(dri2_dpy, config,
 916                                            __DRI_ATTRIB_DOUBLE_BUFFER, 0)) {
 917             continue;
 918          }
 919
 920          if (dri2_add_config(disp, config, config_count + 1, surface_type,
 921                              config_attrs, rgba_masks)) {
 922             config_count++;
 923             break;
 924          }
 925       }
 926    }
 927
 928    if (!config_count) {
 929       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 930       return EGL_FALSE;
 931    }
 932
 933    return EGL_TRUE;
 934 }
 935
 936 static EGLBoolean
 937 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 938                  _EGLSurface *draw, xcb_xfixes_region_t region)
 939 {
 940    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 941    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 942    enum xcb_dri2_attachment_t render_attachment;
 943    xcb_dri2_copy_region_cookie_t cookie;
 944
 945    /* No-op for a pixmap or pbuffer surface */
 946    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 947       return EGL_TRUE;
 948
 949    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 950
 951    if (dri2_surf->have_fake_front)
 952       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 953    else
 954       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 955
 956    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 957                                            dri2_surf->drawable,
 958                                            region,
 959                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 960                                            render_attachment);
 961    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 962
 963    return EGL_TRUE;
 964 }
 965
 966 static int64_t
 967 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 968                           int64_t msc, int64_t divisor, int64_t remainder)
 969 {
 970    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 971    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 972    uint32_t msc_hi = msc >> 32;
 973    uint32_t msc_lo = msc & 0xffffffff;
 974    uint32_t divisor_hi = divisor >> 32;
 975    uint32_t divisor_lo = divisor & 0xffffffff;
 976    uint32_t remainder_hi = remainder >> 32;
 977    uint32_t remainder_lo = remainder & 0xffffffff;
 978    xcb_dri2_swap_buffers_cookie_t cookie;
 979    xcb_dri2_swap_buffers_reply_t *reply;
 980    int64_t swap_count = -1;
 981
 982    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available) {
 983       swap_count = dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 984    } else {
 985       dri2_flush_drawable_for_swapbuffers(disp, draw);
 986
 987       cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn,
 988                                                dri2_surf->drawable, msc_hi,
 989                                                msc_lo, divisor_hi, divisor_lo,
 990                                                remainder_hi, remainder_lo);
 991
 992       reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 993
 994       if (reply) {
 995          swap_count = combine_u32_into_u64(reply->swap_hi, reply->swap_lo);
 996          free(reply);
 997       }
 998    }
 999
1000    /* Since we aren't watching for the server's invalidate events like we're
1001     * supposed to (due to XCB providing no mechanism for filtering the events
1002     * the way xlib does), and SwapBuffers is a common cause of invalidate
1003     * events, just shove one down to the driver, even though we haven't told
1004     * the driver that we're the kind of loader that provides reliable
1005     * invalidate events.  This causes the driver to request buffers again at
1006     * its next draw, so that we get the correct buffers if a pageflip
1007     * happened.  The driver should still be using the viewport hack to catch
1008     * window resizes.
1009     */
1010    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
1011       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
1012
1013    return swap_count;
1014 }
1015
1016 static EGLBoolean
1017 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
1018 {
1019    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1020    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1021
1022    if (!dri2_dpy->flush) {
1023       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
1024       return EGL_TRUE;
1025    }
1026
1027    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
1028       /* Swap failed with a window drawable. */
1029       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
1030    }
1031    return EGL_TRUE;
1032 }
1033
1034 static EGLBoolean
1035 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
1036                              _EGLSurface *draw,
1037                              EGLint numRects, const EGLint *rects)
1038 {
1039    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1040    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1041    EGLBoolean ret;
1042    xcb_xfixes_region_t region;
1043    xcb_rectangle_t rectangles[16];
1044
1045    if (numRects > (int)ARRAY_SIZE(rectangles))
1046       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
1047
1048    for (int i = 0; i < numRects; i++) {
1049       rectangles[i].x = rects[i * 4];
1050       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
1051       rectangles[i].width = rects[i * 4 + 2];
1052       rectangles[i].height = rects[i * 4 + 3];
1053    }
1054
1055    region = xcb_generate_id(dri2_dpy->conn);
1056    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
1057    ret = dri2_copy_region(drv, disp, draw, region);
1058    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
1059
1060    return ret;
1061 }
1062
1063 static EGLBoolean
1064 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
1065                      EGLint x, EGLint y, EGLint width, EGLint height)
1066 {
1067    const EGLint rect[4] = { x, y, width, height };
1068
1069    if (x < 0 || y < 0 || width < 0 || height < 0)
1070       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
1071
1072    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
1073 }
1074
1075 static EGLBoolean
1076 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
1077                        EGLint interval)
1078 {
1079    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1080    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
1081
1082    if (dri2_dpy->swap_available)
1083       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
1084
1085    return EGL_TRUE;
1086 }
1087
1088 static EGLBoolean
1089 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
1090                       void *native_pixmap_target)
1091 {
1092    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1093    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
1094    xcb_gcontext_t gc;
1095    xcb_pixmap_t target;
1096
1097    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
1098    target = (uintptr_t) native_pixmap_target;
1099
1100    (void) drv;
1101
1102    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
1103
1104    gc = xcb_generate_id(dri2_dpy->conn);
1105    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
1106    xcb_copy_area(dri2_dpy->conn,
1107                   dri2_surf->drawable,
1108                   target,
1109                   gc,
1110                   0, 0,
1111                   0, 0,
1112                   dri2_surf->base.Width,
1113                   dri2_surf->base.Height);
1114    xcb_free_gc(dri2_dpy->conn, gc);
1115
1116    return EGL_TRUE;
1117 }
1118
1119 uint32_t
1120 dri2_format_for_depth(struct dri2_egl_display *dri2_dpy, uint32_t depth)
1121 {
1122    switch (depth) {
1123    case 16:
1124       return __DRI_IMAGE_FORMAT_RGB565;
1125    case 24:
1126       return __DRI_IMAGE_FORMAT_XRGB8888;
1127    case 30:
1128       /* Different preferred formats for different hw */
1129       if (dri2_x11_get_red_mask_for_depth(dri2_dpy, 30) == 0x3ff)
1130          return __DRI_IMAGE_FORMAT_XBGR2101010;
1131       else
1132          return __DRI_IMAGE_FORMAT_XRGB2101010;
1133    case 32:
1134       return __DRI_IMAGE_FORMAT_ARGB8888;
1135    default:
1136       return __DRI_IMAGE_FORMAT_NONE;
1137    }
1138 }
1139
1140 static _EGLImage *
1141 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1142                              EGLClientBuffer buffer, const EGLint *attr_list)
1143 {
1144    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1145    struct dri2_egl_image *dri2_img;
1146    unsigned int attachments[1];
1147    xcb_drawable_t drawable;
1148    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1149    xcb_dri2_get_buffers_reply_t *buffers_reply;
1150    xcb_dri2_dri2_buffer_t *buffers;
1151    xcb_get_geometry_cookie_t geometry_cookie;
1152    xcb_get_geometry_reply_t *geometry_reply;
1153    xcb_generic_error_t *error;
1154    int stride, format;
1155
1156    (void) ctx;
1157
1158    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1159    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1160    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1161    buffers_cookie =
1162       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1163                                       drawable, 1, 1, attachments);
1164    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1165    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1166                                                buffers_cookie, NULL);
1167    if (buffers_reply == NULL)
1168      return NULL;
1169
1170    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1171    if (buffers == NULL) {
1172       return NULL;
1173    }
1174
1175    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1176                                             geometry_cookie, &error);
1177    if (geometry_reply == NULL || error != NULL) {
1178       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1179       free(error);
1180       free(buffers_reply);
1181       return NULL;
1182    }
1183
1184    format = dri2_format_for_depth(dri2_dpy, geometry_reply->depth);
1185    if (format == __DRI_IMAGE_FORMAT_NONE) {
1186       _eglError(EGL_BAD_PARAMETER,
1187                 "dri2_create_image_khr: unsupported pixmap depth");
1188       free(buffers_reply);
1189       free(geometry_reply);
1190       return NULL;
1191    }
1192
1193    dri2_img = malloc(sizeof *dri2_img);
1194    if (!dri2_img) {
1195       free(buffers_reply);
1196       free(geometry_reply);
1197       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1198       return EGL_NO_IMAGE_KHR;
1199    }
1200
1201    _eglInitImage(&dri2_img->base, disp);
1202
1203    stride = buffers[0].pitch / buffers[0].cpp;
1204    dri2_img->dri_image =
1205       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1206                                            buffers_reply->width,
1207                                            buffers_reply->height,
1208                                            format,
1209                                            buffers[0].name,
1210                                            stride,
1211                                            dri2_img);
1212
1213    free(buffers_reply);
1214    free(geometry_reply);
1215
1216    return &dri2_img->base;
1217 }
1218
1219 static _EGLImage *
1220 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1221                           _EGLContext *ctx, EGLenum target,
1222                           EGLClientBuffer buffer, const EGLint *attr_list)
1223 {
1224    (void) drv;
1225
1226    switch (target) {
1227    case EGL_NATIVE_PIXMAP_KHR:
1228       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1229    default:
1230       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1231    }
1232 }
1233
1234 static EGLBoolean
1235 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1236                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1237                          EGLuint64KHR *sbc)
1238 {
1239    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1240    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1241    xcb_dri2_get_msc_cookie_t cookie;
1242    xcb_dri2_get_msc_reply_t *reply;
1243
1244    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1245    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1246
1247    if (!reply)
1248       return _eglError(EGL_BAD_ACCESS, __func__);
1249
1250    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1251    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1252    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1253    free(reply);
1254
1255    return EGL_TRUE;
1256 }
1257
1258 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1259    .authenticate = NULL,
1260    .create_window_surface = dri2_x11_create_window_surface,
1261    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1262    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1263    .destroy_surface = dri2_x11_destroy_surface,
1264    .create_image = dri2_create_image_khr,
1265    .swap_buffers = dri2_x11_swap_buffers,
1266    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1267    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1268    /* XXX: should really implement this since X11 has pixmaps */
1269    .copy_buffers = dri2_fallback_copy_buffers,
1270    .query_buffer_age = dri2_fallback_query_buffer_age,
1271    .query_surface = dri2_query_surface,
1272    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1273    .get_sync_values = dri2_fallback_get_sync_values,
1274    .get_dri_drawable = dri2_surface_get_dri_drawable,
1275 };
1276
1277 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1278    .authenticate = dri2_x11_authenticate,
1279    .create_window_surface = dri2_x11_create_window_surface,
1280    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1281    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1282    .destroy_surface = dri2_x11_destroy_surface,
1283    .create_image = dri2_x11_create_image_khr,
1284    .swap_interval = dri2_x11_swap_interval,
1285    .swap_buffers = dri2_x11_swap_buffers,
1286    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1287    .swap_buffers_region = dri2_x11_swap_buffers_region,
1288    .post_sub_buffer = dri2_x11_post_sub_buffer,
1289    .copy_buffers = dri2_x11_copy_buffers,
1290    .query_buffer_age = dri2_fallback_query_buffer_age,
1291    .query_surface = dri2_query_surface,
1292    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1293    .get_sync_values = dri2_x11_get_sync_values,
1294    .get_dri_drawable = dri2_surface_get_dri_drawable,
1295 };
1296
1297 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1298    .base = { __DRI_SWRAST_LOADER, 1 },
1299
1300    .getDrawableInfo = swrastGetDrawableInfo,
1301    .putImage        = swrastPutImage,
1302    .getImage        = swrastGetImage,
1303 };
1304
1305 static const __DRIextension *swrast_loader_extensions[] = {
1306    &swrast_loader_extension.base,
1307    &image_lookup_extension.base,
1308    NULL,
1309 };
1310
1311 static int
1312 dri2_find_screen_for_display(const _EGLDisplay *disp, int fallback_screen)
1313 {
1314    const EGLAttrib *attr;
1315
1316    for (attr = disp->Options.Attribs; attr; attr += 2) {
1317       if (attr[0] == EGL_PLATFORM_X11_SCREEN_EXT)
1318          return attr[1];
1319    }
1320
1321    return fallback_screen;
1322 }
1323
1324 static EGLBoolean
1325 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1326                         struct dri2_egl_display *dri2_dpy)
1327 {
1328    xcb_screen_iterator_t s;
1329    int screen;
1330    const char *msg;
1331
1332    disp->DriverData = (void *) dri2_dpy;
1333    if (disp->PlatformDisplay == NULL) {
1334       dri2_dpy->conn = xcb_connect(NULL, &screen);
1335       dri2_dpy->own_device = true;
1336       screen = dri2_find_screen_for_display(disp, screen);
1337    } else {
1338       Display *dpy = disp->PlatformDisplay;
1339       dri2_dpy->conn = XGetXCBConnection(dpy);
1340       screen = DefaultScreen(dpy);
1341    }
1342
1343    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1344       msg = "xcb_connect failed";
1345       goto disconnect;
1346    }
1347
1348    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1349    dri2_dpy->screen = get_xcb_screen(s, screen);
1350    if (!dri2_dpy->screen) {
1351       msg = "failed to get xcb screen";
1352       goto disconnect;
1353    }
1354
1355    return EGL_TRUE;
1356 disconnect:
1357    if (disp->PlatformDisplay == NULL)
1358       xcb_disconnect(dri2_dpy->conn);
1359
1360    return _eglError(EGL_BAD_ALLOC, msg);
1361 }
1362
1363 static EGLBoolean
1364 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1365 {
1366    _EGLDevice *dev;
1367    struct dri2_egl_display *dri2_dpy;
1368
1369    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1370    if (!dri2_dpy)
1371       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1372
1373    dri2_dpy->fd = -1;
1374    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1375       goto cleanup;
1376
1377    dev = _eglAddDevice(dri2_dpy->fd, true);
1378    if (!dev) {
1379       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to find EGLDevice");
1380       goto cleanup;
1381    }
1382
1383    disp->Device = dev;
1384
1385    /*
1386     * Every hardware driver_name is set using strdup. Doing the same in
1387     * here will allow is to simply free the memory at dri2_terminate().
1388     */
1389    dri2_dpy->driver_name = strdup("swrast");
1390    if (!dri2_load_driver_swrast(disp))
1391       goto cleanup;
1392
1393    dri2_dpy->loader_extensions = swrast_loader_extensions;
1394
1395    if (!dri2_create_screen(disp))
1396       goto cleanup;
1397
1398    if (!dri2_setup_extensions(disp))
1399       goto cleanup;
1400
1401    dri2_setup_screen(disp);
1402
1403    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true, false))
1404       goto cleanup;
1405
1406    /* Fill vtbl last to prevent accidentally calling virtual function during
1407     * initialization.
1408     */
1409    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1410
1411    return EGL_TRUE;
1412
1413  cleanup:
1414    dri2_display_destroy(disp);
1415    return EGL_FALSE;
1416 }
1417
1418 static void
1419 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1420 {
1421    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1422    int arbitrary_max_interval = 1000;
1423
1424    /* default behavior for no SwapBuffers support: no vblank syncing
1425     * either.
1426     */
1427    dri2_dpy->min_swap_interval = 0;
1428    dri2_dpy->max_swap_interval = 0;
1429    dri2_dpy->default_swap_interval = 0;
1430
1431    if (!dri2_dpy->swap_available)
1432       return;
1433
1434    /* If we do have swapbuffers, then we can support pretty much any swap
1435     * interval.
1436     */
1437    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1438 }
1439
1440 #ifdef HAVE_DRI3
1441
1442 static const __DRIextension *dri3_image_loader_extensions[] = {
1443    &dri3_image_loader_extension.base,
1444    &image_lookup_extension.base,
1445    &use_invalidate.base,
1446    &background_callable_extension.base,
1447    NULL,
1448 };
1449
1450 static EGLBoolean
1451 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1452 {
1453    _EGLDevice *dev;
1454    struct dri2_egl_display *dri2_dpy;
1455
1456    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1457    if (!dri2_dpy)
1458       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1459
1460    dri2_dpy->fd = -1;
1461    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1462       goto cleanup;
1463
1464    if (!dri3_x11_connect(dri2_dpy))
1465       goto cleanup;
1466
1467    dev = _eglAddDevice(dri2_dpy->fd, false);
1468    if (!dev) {
1469       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to find EGLDevice");
1470       goto cleanup;
1471    }
1472
1473    disp->Device = dev;
1474
1475    if (!dri2_load_driver_dri3(disp))
1476       goto cleanup;
1477
1478    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1479
1480    dri2_dpy->swap_available = true;
1481    dri2_dpy->invalidate_available = true;
1482
1483    if (!dri2_create_screen(disp))
1484       goto cleanup;
1485
1486    if (!dri2_setup_extensions(disp))
1487       goto cleanup;
1488
1489    dri2_setup_screen(disp);
1490
1491    dri2_x11_setup_swap_interval(disp);
1492
1493    if (!dri2_dpy->is_different_gpu)
1494       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1495    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1496    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1497    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1498
1499    dri2_set_WL_bind_wayland_display(drv, disp);
1500
1501    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false, true))
1502       goto cleanup;
1503
1504    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1505    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1506    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1507    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1508    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1509    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1510
1511    /* Fill vtbl last to prevent accidentally calling virtual function during
1512     * initialization.
1513     */
1514    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1515
1516    _eglLog(_EGL_INFO, "Using DRI3");
1517
1518    return EGL_TRUE;
1519
1520  cleanup:
1521    dri2_display_destroy(disp);
1522    return EGL_FALSE;
1523 }
1524 #endif
1525
1526 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1527    .base = { __DRI_DRI2_LOADER, 2 },
1528
1529    .getBuffers           = dri2_x11_get_buffers,
1530    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1531    .getBuffersWithFormat = NULL,
1532 };
1533
1534 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1535    .base = { __DRI_DRI2_LOADER, 3 },
1536
1537    .getBuffers           = dri2_x11_get_buffers,
1538    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1539    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1540 };
1541
1542 static const __DRIextension *dri2_loader_extensions_old[] = {
1543    &dri2_loader_extension_old.base,
1544    &image_lookup_extension.base,
1545    &background_callable_extension.base,
1546    NULL,
1547 };
1548
1549 static const __DRIextension *dri2_loader_extensions[] = {
1550    &dri2_loader_extension.base,
1551    &image_lookup_extension.base,
1552    &use_invalidate.base,
1553    &background_callable_extension.base,
1554    NULL,
1555 };
1556
1557 static EGLBoolean
1558 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1559 {
1560    _EGLDevice *dev;
1561    struct dri2_egl_display *dri2_dpy;
1562
1563    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1564    if (!dri2_dpy)
1565       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1566
1567    dri2_dpy->fd = -1;
1568    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1569       goto cleanup;
1570
1571    if (!dri2_x11_connect(dri2_dpy))
1572       goto cleanup;
1573
1574    dev = _eglAddDevice(dri2_dpy->fd, false);
1575    if (!dev) {
1576       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to find EGLDevice");
1577       goto cleanup;
1578    }
1579
1580    disp->Device = dev;
1581
1582    if (!dri2_load_driver(disp))
1583       goto cleanup;
1584
1585    if (dri2_dpy->dri2_minor >= 1)
1586       dri2_dpy->loader_extensions = dri2_loader_extensions;
1587    else
1588       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1589
1590    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1591    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1592
1593    if (!dri2_create_screen(disp))
1594       goto cleanup;
1595
1596    if (!dri2_setup_extensions(disp))
1597       goto cleanup;
1598
1599    dri2_setup_screen(disp);
1600
1601    dri2_x11_setup_swap_interval(disp);
1602
1603    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1604    disp->Extensions.NOK_swap_region = EGL_TRUE;
1605    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1606    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1607    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1608
1609    dri2_set_WL_bind_wayland_display(drv, disp);
1610
1611    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true, false))
1612       goto cleanup;
1613
1614    /* Fill vtbl last to prevent accidentally calling virtual function during
1615     * initialization.
1616     */
1617    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1618
1619    _eglLog(_EGL_INFO, "Using DRI2");
1620
1621    return EGL_TRUE;
1622
1623  cleanup:
1624    dri2_display_destroy(disp);
1625    return EGL_FALSE;
1626 }
1627
1628 EGLBoolean
1629 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1630 {
1631    EGLBoolean initialized = EGL_FALSE;
1632
1633    if (!disp->Options.ForceSoftware) {
1634 #ifdef HAVE_DRI3
1635       if (!env_var_as_boolean("LIBGL_DRI3_DISABLE", false))
1636          initialized = dri2_initialize_x11_dri3(drv, disp);
1637 #endif
1638
1639       if (!initialized)
1640          initialized = dri2_initialize_x11_dri2(drv, disp);
1641    }
1642
1643    if (!initialized)
1644       initialized = dri2_initialize_x11_swrast(drv, disp);
1645
1646    return initialized;
1647 }
1648
1649 void
1650 dri2_teardown_x11(struct dri2_egl_display *dri2_dpy)
1651 {
1652    if (dri2_dpy->own_device)
1653       xcb_disconnect(dri2_dpy->conn);
1654 }