src/egl/drivers/dri2/egl_dri2.c

   1 /*
   2  * Copyright © 2010 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 <GL/gl.h>
  38 #include <GL/internal/dri_interface.h>
  39 #include <xcb/xcb.h>
  40 #include <xcb/dri2.h>
  41 #include <xcb/xfixes.h>
  42 #include <X11/Xlib-xcb.h>
  43
  44 #include <glapi/glapi.h>
  45 #include "eglconfigutil.h"
  46 #include "eglconfig.h"
  47 #include "eglcontext.h"
  48 #include "egldisplay.h"
  49 #include "egldriver.h"
  50 #include "eglcurrent.h"
  51 #include "egllog.h"
  52 #include "eglsurface.h"
  53
  54 struct dri2_egl_driver
  55 {
  56    _EGLDriver base;
  57 };
  58
  59 struct dri2_egl_display
  60 {
  61    xcb_connection_t     *conn;
  62    int                   dri2_major;
  63    int                   dri2_minor;
  64    __DRIscreen          *dri_screen;
  65    void                 *driver;
  66    __DRIcoreExtension   *core;
  67    __DRIdri2Extension   *dri2;
  68    __DRI2flushExtension *flush;
  69    int                   fd;
  70
  71    __DRIdri2LoaderExtension  loader_extension;
  72    const __DRIextension     *extensions[2];
  73 };
  74
  75 struct dri2_egl_context
  76 {
  77    _EGLContext   base;
  78    __DRIcontext *dri_context;
  79 };
  80
  81 struct dri2_egl_surface
  82 {
  83    _EGLSurface          base;
  84    __DRIdrawable       *dri_drawable;
  85    xcb_drawable_t       drawable;
  86    __DRIbuffer          buffers[5];
  87    int                  buffer_count;
  88    xcb_xfixes_region_t  region;
  89    int                  have_back;
  90    int                  have_fake_front;
  91    int                  swap_interval;
  92 };
  93
  94 struct dri2_egl_config
  95 {
  96    _EGLConfig base;
  97    const __DRIconfig *dri_config;
  98 };
  99
 100 /* standard typecasts */
 101 _EGL_DRIVER_STANDARD_TYPECASTS(dri2_egl)
 102
 103 EGLint dri2_to_egl_attribute_map[] = {
 104    0,
 105    EGL_BUFFER_SIZE,             /* __DRI_ATTRIB_BUFFER_SIZE */
 106    EGL_LEVEL,                   /* __DRI_ATTRIB_LEVEL */
 107    EGL_RED_SIZE,                /* __DRI_ATTRIB_RED_SIZE */
 108    EGL_GREEN_SIZE,              /* __DRI_ATTRIB_GREEN_SIZE */
 109    EGL_BLUE_SIZE,               /* __DRI_ATTRIB_BLUE_SIZE */
 110    0,                           /* __DRI_ATTRIB_LUMINANCE_SIZE */
 111    EGL_ALPHA_SIZE,              /* __DRI_ATTRIB_ALPHA_SIZE */
 112    0,                           /* __DRI_ATTRIB_ALPHA_MASK_SIZE */
 113    EGL_DEPTH_SIZE,              /* __DRI_ATTRIB_DEPTH_SIZE */
 114    EGL_STENCIL_SIZE,            /* __DRI_ATTRIB_STENCIL_SIZE */
 115    0,                           /* __DRI_ATTRIB_ACCUM_RED_SIZE */
 116    0,                           /* __DRI_ATTRIB_ACCUM_GREEN_SIZE */
 117    0,                           /* __DRI_ATTRIB_ACCUM_BLUE_SIZE */
 118    0,                           /* __DRI_ATTRIB_ACCUM_ALPHA_SIZE */
 119    EGL_SAMPLE_BUFFERS,          /* __DRI_ATTRIB_SAMPLE_BUFFERS */
 120    EGL_SAMPLES,                 /* __DRI_ATTRIB_SAMPLES */
 121    0,                           /* __DRI_ATTRIB_RENDER_TYPE, */
 122    0,                           /* __DRI_ATTRIB_CONFIG_CAVEAT */
 123    0,                           /* __DRI_ATTRIB_CONFORMANT */
 124    0,                           /* __DRI_ATTRIB_DOUBLE_BUFFER */
 125    0,                           /* __DRI_ATTRIB_STEREO */
 126    0,                           /* __DRI_ATTRIB_AUX_BUFFERS */
 127    0,                           /* __DRI_ATTRIB_TRANSPARENT_TYPE */
 128    0,                           /* __DRI_ATTRIB_TRANSPARENT_INDEX_VALUE */
 129    0,                           /* __DRI_ATTRIB_TRANSPARENT_RED_VALUE */
 130    0,                           /* __DRI_ATTRIB_TRANSPARENT_GREEN_VALUE */
 131    0,                           /* __DRI_ATTRIB_TRANSPARENT_BLUE_VALUE */
 132    0,                           /* __DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE */
 133    0,                           /* __DRI_ATTRIB_FLOAT_MODE */
 134    0,                           /* __DRI_ATTRIB_RED_MASK */
 135    0,                           /* __DRI_ATTRIB_GREEN_MASK */
 136    0,                           /* __DRI_ATTRIB_BLUE_MASK */
 137    0,                           /* __DRI_ATTRIB_ALPHA_MASK */
 138    EGL_MAX_PBUFFER_WIDTH,       /* __DRI_ATTRIB_MAX_PBUFFER_WIDTH */
 139    EGL_MAX_PBUFFER_HEIGHT,      /* __DRI_ATTRIB_MAX_PBUFFER_HEIGHT */
 140    EGL_MAX_PBUFFER_PIXELS,      /* __DRI_ATTRIB_MAX_PBUFFER_PIXELS */
 141    0,                           /* __DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH */
 142    0,                           /* __DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT */
 143    0,                           /* __DRI_ATTRIB_VISUAL_SELECT_GROUP */
 144    0,                           /* __DRI_ATTRIB_SWAP_METHOD */
 145    EGL_MAX_SWAP_INTERVAL,       /* __DRI_ATTRIB_MAX_SWAP_INTERVAL */
 146    EGL_MIN_SWAP_INTERVAL,       /* __DRI_ATTRIB_MIN_SWAP_INTERVAL */
 147    0,                           /* __DRI_ATTRIB_BIND_TO_TEXTURE_RGB */
 148    0,                           /* __DRI_ATTRIB_BIND_TO_TEXTURE_RGBA */
 149    0,                           /* __DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE */
 150    0,                           /* __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS */
 151    0,                           /* __DRI_ATTRIB_YINVERTED */
 152 };
 153
 154 static void
 155 dri2_add_config(_EGLDisplay *disp, const __DRIconfig *dri_config, int id)
 156 {
 157    struct dri2_egl_config *conf;
 158    struct dri2_egl_display *dri2_dpy;
 159    unsigned int attrib, value, double_buffer;
 160    EGLint key, bind_to_texture_rgb, bind_to_texture_rgba;
 161    int i;
 162
 163    dri2_dpy = disp->DriverData;
 164    conf = malloc(sizeof *conf);
 165    if (conf == NULL)
 166       return;
 167
 168    conf->dri_config = dri_config;
 169    _eglInitConfig(&conf->base, disp, id);
 170
 171    i = 0;
 172    while (dri2_dpy->core->indexConfigAttrib(dri_config, i++, &attrib, &value)) {
 173       switch (attrib) {
 174       case 0:
 175          break;
 176
 177       case __DRI_ATTRIB_RENDER_TYPE:
 178          if (value & __DRI_ATTRIB_RGBA_BIT)
 179             value = EGL_RGB_BUFFER;
 180          else if (value & __DRI_ATTRIB_LUMINANCE_BIT)
 181             value = EGL_LUMINANCE_BUFFER;
 182          else
 183             /* not valid */;
 184          _eglSetConfigKey(&conf->base, EGL_COLOR_BUFFER_TYPE, value);
 185          break;
 186
 187       case __DRI_ATTRIB_CONFIG_CAVEAT:
 188          if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
 189             value = EGL_NON_CONFORMANT_CONFIG;
 190          else if (value & __DRI_ATTRIB_SLOW_BIT)
 191             value = EGL_SLOW_CONFIG;
 192          else
 193             value = EGL_NONE;
 194          _eglSetConfigKey(&conf->base, EGL_CONFIG_CAVEAT, value);
 195          break;
 196
 197       case __DRI_ATTRIB_BIND_TO_TEXTURE_RGB:
 198          bind_to_texture_rgb = value;
 199          break;
 200
 201       case __DRI_ATTRIB_BIND_TO_TEXTURE_RGBA:
 202          bind_to_texture_rgba = value;
 203          break;
 204
 205       case __DRI_ATTRIB_DOUBLE_BUFFER:
 206          double_buffer = value;
 207          break;
 208
 209       default:
 210          key = dri2_to_egl_attribute_map[attrib];
 211          if (key != 0)
 212             _eglSetConfigKey(&conf->base, key, value);
 213          break;
 214       }
 215    }
 216
 217    /* EGL_SWAP_BEHAVIOR_PRESERVED_BIT */
 218
 219    if (double_buffer) {
 220       /* FIXME: Figure out how to get the visual ID and types */
 221       _eglSetConfigKey(&conf->base, EGL_SURFACE_TYPE, EGL_WINDOW_BIT);
 222       _eglSetConfigKey(&conf->base, EGL_NATIVE_VISUAL_ID, 0x21);
 223       _eglSetConfigKey(&conf->base, EGL_NATIVE_VISUAL_TYPE,
 224                        XCB_VISUAL_CLASS_TRUE_COLOR);
 225    } else {
 226       _eglSetConfigKey(&conf->base,
 227                        EGL_SURFACE_TYPE, EGL_PIXMAP_BIT | EGL_PBUFFER_BIT);
 228       _eglSetConfigKey(&conf->base,
 229                        EGL_BIND_TO_TEXTURE_RGB, bind_to_texture_rgb);
 230       _eglSetConfigKey(&conf->base,
 231                        EGL_BIND_TO_TEXTURE_RGBA, bind_to_texture_rgba);
 232    }
 233
 234    /* EGL_OPENGL_ES_BIT, EGL_OPENVG_BIT, EGL_OPENGL_ES2_BIT */
 235    _eglSetConfigKey(&conf->base, EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT);
 236    _eglSetConfigKey(&conf->base, EGL_CONFORMANT, EGL_OPENGL_BIT);
 237
 238    if (!_eglValidateConfig(&conf->base, EGL_FALSE)) {
 239       _eglLog(_EGL_DEBUG, "DRI2: failed to validate config %d", id);
 240       free(conf);
 241       return;
 242    }
 243
 244    _eglAddConfig(disp, &conf->base);
 245 }
 246
 247 /**
 248  * Process list of buffer received from the server
 249  *
 250  * Processes the list of buffers received in a reply from the server to either
 251  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 252  */
 253 static void
 254 dri2_process_buffers(struct dri2_egl_surface *dri2_surf,
 255                      xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 256 {
 257    struct dri2_egl_display *dri2_dpy =
 258       dri2_egl_display(dri2_surf->base.Resource.Display);
 259    xcb_rectangle_t rectangle;
 260    int i;
 261
 262    dri2_surf->buffer_count = count;
 263    dri2_surf->have_fake_front = 0;
 264    dri2_surf->have_back = 0;
 265
 266    /* This assumes the DRI2 buffer attachment tokens matches the
 267     * __DRIbuffer tokens. */
 268    for (i = 0; i < count; i++) {
 269       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 270       dri2_surf->buffers[i].name = buffers[i].name;
 271       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 272       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 273       dri2_surf->buffers[i].flags = buffers[i].flags;
 274       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 275          dri2_surf->have_fake_front = 1;
 276       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 277          dri2_surf->have_back = 1;
 278    }
 279
 280    if (dri2_surf->region != XCB_NONE)
 281       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 282
 283    rectangle.x = 0;
 284    rectangle.y = 0;
 285    rectangle.width = dri2_surf->base.Width;
 286    rectangle.height = dri2_surf->base.Height;
 287    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 288    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 289 }
 290
 291 static __DRIbuffer *
 292 dri2_get_buffers(__DRIdrawable * driDrawable,
 293                 int *width, int *height,
 294                 unsigned int *attachments, int count,
 295                 int *out_count, void *loaderPrivate)
 296 {
 297    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 298    struct dri2_egl_display *dri2_dpy =
 299       dri2_egl_display(dri2_surf->base.Resource.Display);
 300    xcb_dri2_dri2_buffer_t *buffers;
 301    xcb_dri2_get_buffers_reply_t *reply;
 302    xcb_dri2_get_buffers_cookie_t cookie;
 303
 304    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 305                                             dri2_surf->drawable,
 306                                             count, count, attachments);
 307    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 308    buffers = xcb_dri2_get_buffers_buffers (reply);
 309    if (buffers == NULL)
 310       return NULL;
 311
 312    *out_count = reply->count;
 313    dri2_surf->base.Width = *width = reply->width;
 314    dri2_surf->base.Height = *height = reply->height;
 315    dri2_process_buffers(dri2_surf, buffers, *out_count);
 316
 317    free(reply);
 318
 319    return dri2_surf->buffers;
 320 }
 321
 322 static void
 323 dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 324 {
 325    /* FIXME: Does EGL support front buffer rendering at all? */
 326
 327 #if 0
 328    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 329
 330    dri2WaitGL(dri2_surf);
 331 #endif
 332 }
 333
 334 static __DRIbuffer *
 335 dri2_get_buffers_with_format(__DRIdrawable * driDrawable,
 336                              int *width, int *height,
 337                              unsigned int *attachments, int count,
 338                              int *out_count, void *loaderPrivate)
 339 {
 340    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 341    struct dri2_egl_display *dri2_dpy =
 342       dri2_egl_display(dri2_surf->base.Resource.Display);
 343    xcb_dri2_dri2_buffer_t *buffers;
 344    xcb_dri2_get_buffers_with_format_reply_t *reply;
 345    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 346    xcb_dri2_attach_format_t *format_attachments;
 347
 348    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 349    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 350                                                         dri2_surf->drawable,
 351                                                         count, count,
 352                                                         format_attachments);
 353
 354    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 355                                                    cookie, NULL);
 356    if (reply == NULL)
 357       return NULL;
 358
 359    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 360    dri2_surf->base.Width = *width = reply->width;
 361    dri2_surf->base.Height = *height = reply->height;
 362    *out_count = reply->count;
 363    dri2_process_buffers(dri2_surf, buffers, *out_count);
 364
 365    free(reply);
 366
 367    return dri2_surf->buffers;
 368 }
 369
 370 #ifdef GLX_USE_TLS
 371 static const char dri_driver_format[] = "%.*s/tls/%.*s_dri.so";
 372 #else
 373 static const char dri_driver_format[] = "%.*s/%.*s_dri.so";
 374 #endif
 375
 376 static const char dri_driver_path[] = DEFAULT_DRIVER_DIR;
 377
 378 /**
 379  * Called via eglInitialize(), GLX_drv->API.Initialize().
 380  */
 381 static EGLBoolean
 382 dri2_initialize(_EGLDriver *drv, _EGLDisplay *disp,
 383                 EGLint *major, EGLint *minor)
 384 {
 385    const __DRIextension **extensions;
 386    const __DRIconfig **driver_configs;
 387    struct dri2_egl_display *dri2_dpy;
 388    char path[PATH_MAX], *search_paths, *p, *next, *end;
 389    xcb_xfixes_query_version_reply_t *xfixes_query;
 390    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 391    xcb_dri2_query_version_reply_t *dri2_query;
 392    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 393    xcb_dri2_connect_reply_t *connect = NULL;
 394    xcb_dri2_connect_cookie_t connect_cookie;
 395    xcb_dri2_authenticate_reply_t *authenticate;
 396    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 397    xcb_generic_error_t *error;
 398    drm_magic_t magic;
 399    xcb_screen_iterator_t s;
 400    int i;
 401
 402    dri2_dpy = malloc(sizeof *dri2_dpy);
 403    if (!dri2_dpy)
 404       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 405
 406    disp->DriverData = (void *) dri2_dpy;
 407    dri2_dpy->conn = XGetXCBConnection(disp->NativeDisplay);
 408    if (!dri2_dpy->conn) {
 409       dri2_dpy->conn = xcb_connect(0, 0);
 410       if (!dri2_dpy->conn) {
 411          _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
 412          free(dri2_dpy);
 413          return EGL_FALSE;
 414       }
 415    }
 416
 417    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 418    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 419
 420    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 421                                                   XCB_XFIXES_MAJOR_VERSION,
 422                                                   XCB_XFIXES_MINOR_VERSION);
 423
 424    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 425                                                XCB_DRI2_MAJOR_VERSION,
 426                                                XCB_DRI2_MINOR_VERSION);
 427
 428    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 429    connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
 430                                                 s.data->root,
 431                                                 XCB_DRI2_DRIVER_TYPE_DRI);
 432
 433    xfixes_query =
 434       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 435                                       xfixes_query_cookie, &error);
 436    if (xfixes_query == NULL ||
 437        error != NULL || xfixes_query->major_version < 2) {
 438       _eglLog(_EGL_FATAL, "DRI2: failed to query xfixes version");
 439       free(error);
 440       goto handle_error;
 441    }
 442    free(xfixes_query);
 443
 444    dri2_query =
 445       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 446    if (dri2_query == NULL || error != NULL) {
 447       _eglLog(_EGL_FATAL, "DRI2: failed to query version");
 448       free(error);
 449       goto handle_error;
 450    }
 451    dri2_dpy->dri2_major = dri2_query->major_version;
 452    dri2_dpy->dri2_minor = dri2_query->minor_version;
 453    free(dri2_query);
 454
 455    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 456    if (connect->driver_name_length == 0 && connect->device_name_length == 0) {
 457       _eglLog(_EGL_FATAL, "DRI2: failed to authenticate");
 458       goto handle_error;
 459    }
 460
 461    search_paths = NULL;
 462    if (geteuid() == getuid()) {
 463       /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
 464       search_paths = getenv("LIBGL_DRIVERS_PATH");
 465    }
 466    if (search_paths == NULL)
 467       search_paths = DEFAULT_DRIVER_DIR;
 468
 469    dri2_dpy->driver = NULL;
 470    end = search_paths + strlen(search_paths);
 471    for (p = search_paths; p < end && dri2_dpy->driver == NULL; p = next + 1) {
 472       next = strchr(p, ':');
 473       if (next == NULL)
 474          next = end;
 475
 476       snprintf(path, sizeof path,
 477                dri_driver_format,
 478                (int) (next - p), p,
 479                xcb_dri2_connect_driver_name_length (connect),
 480                xcb_dri2_connect_driver_name (connect));
 481
 482       dri2_dpy->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 483    }
 484
 485    if (dri2_dpy->driver == NULL) {
 486       _eglLog(_EGL_FATAL,
 487               "DRI2: failed to open any driver (search paths %s)",
 488               search_paths);
 489       goto handle_error;
 490    }
 491
 492    _eglLog(_EGL_DEBUG, "DRI2: dlopen(%s)", path);
 493    extensions = dlsym(dri2_dpy->driver, __DRI_DRIVER_EXTENSIONS);
 494    if (extensions == NULL) {
 495       _eglLog(_EGL_FATAL,
 496               "DRI2: driver exports no extensions (%s)", dlerror());
 497       goto handle_error;
 498    }
 499
 500    for (i = 0; extensions[i]; i++) {
 501       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 502          dri2_dpy->core = (__DRIcoreExtension *) extensions[i];
 503       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 504          dri2_dpy->dri2 = (__DRIdri2Extension *) extensions[i];
 505    }
 506
 507    if (dri2_dpy->core == NULL) {
 508       _eglLog(_EGL_FATAL, "DRI2: driver has no core extension");
 509       goto handle_error;
 510    }
 511
 512    if (dri2_dpy->dri2 == NULL) {
 513       _eglLog(_EGL_FATAL, "DRI2: driver has no dri2 extension");
 514       goto handle_error;
 515    }
 516
 517    snprintf(path, sizeof path, "%.*s",
 518             xcb_dri2_connect_device_name_length (connect),
 519             xcb_dri2_connect_device_name (connect));
 520    dri2_dpy->fd = open (path, O_RDWR);
 521    if (dri2_dpy->fd == -1) {
 522       _eglLog(_EGL_FATAL,
 523               "DRI2: could not open %s (%s)", path, strerror(errno));
 524       goto handle_error;
 525    }
 526
 527    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 528       _eglLog(_EGL_FATAL, "DRI2: failed to get drm magic");
 529       goto handle_error;
 530    }
 531
 532    authenticate_cookie = xcb_dri2_authenticate_unchecked (dri2_dpy->conn,
 533                                                           s.data->root, magic);
 534    authenticate = xcb_dri2_authenticate_reply (dri2_dpy->conn,
 535                                                authenticate_cookie, NULL);
 536    if (authenticate == NULL || !authenticate->authenticated) {
 537       _eglLog(_EGL_FATAL, "DRI2: failed to authenticate");
 538       goto handle_error;
 539    }
 540
 541    if (dri2_dpy->dri2_minor >= 1) {
 542       dri2_dpy->loader_extension.base.name = __DRI_DRI2_LOADER;
 543       dri2_dpy->loader_extension.base.version = 3;
 544       dri2_dpy->loader_extension.getBuffers = dri2_get_buffers;
 545       dri2_dpy->loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
 546       dri2_dpy->loader_extension.getBuffersWithFormat =
 547          dri2_get_buffers_with_format;
 548    } else {
 549       dri2_dpy->loader_extension.base.name = __DRI_DRI2_LOADER;
 550       dri2_dpy->loader_extension.base.version = 2;
 551       dri2_dpy->loader_extension.getBuffers = dri2_get_buffers;
 552       dri2_dpy->loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
 553       dri2_dpy->loader_extension.getBuffersWithFormat = NULL;
 554    }
 555
 556    dri2_dpy->extensions[0] = &dri2_dpy->loader_extension.base;
 557    dri2_dpy->extensions[1] = NULL;
 558
 559    dri2_dpy->dri_screen =
 560       dri2_dpy->dri2->createNewScreen(0, dri2_dpy->fd, dri2_dpy->extensions,
 561                                       &driver_configs, dri2_dpy);
 562
 563    if (dri2_dpy->dri_screen == NULL) {
 564       _eglLog(_EGL_FATAL, "DRI2: failed to create dri screen");
 565       free(dri2_dpy);
 566       goto handle_error;
 567    }
 568
 569    extensions = dri2_dpy->core->getExtensions(dri2_dpy->dri_screen);
 570    for (i = 0; extensions[i]; i++) {
 571       _eglLog(_EGL_DEBUG, "DRI2: found extension `%s'", extensions[i]->name);
 572       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0))
 573          dri2_dpy->flush = (__DRI2flushExtension *) extensions[i];
 574    }
 575
 576    if (dri2_dpy->flush == NULL) {
 577       _eglLog(_EGL_FATAL, "DRI2: driver doesn't support the flush extension");
 578       free(dri2_dpy);
 579       goto handle_error;
 580    }
 581
 582    for (i = 0; driver_configs[i]; i++)
 583       dri2_add_config(disp, driver_configs[i], i + 1);
 584    if (!disp->NumConfigs) {
 585       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 586       goto handle_error;
 587    }
 588
 589    disp->ClientAPIsMask = EGL_OPENGL_BIT;
 590
 591    /* we're supporting EGL 1.4 */
 592    *major = 1;
 593    *minor = 4;
 594
 595    free (connect);
 596    return EGL_TRUE;
 597
 598  handle_error:
 599    free(connect);
 600    free(dri2_dpy);
 601    return EGL_FALSE;
 602 }
 603
 604 /**
 605  * Called via eglTerminate(), drv->API.Terminate().
 606  */
 607 static EGLBoolean
 608 dri2_terminate(_EGLDriver *drv, _EGLDisplay *disp)
 609 {
 610    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 611
 612    _eglReleaseDisplayResources(drv, disp);
 613    _eglCleanupDisplay(disp);
 614
 615    close(dri2_dpy->fd);
 616    dlclose(dri2_dpy->driver);
 617    free(dri2_dpy);
 618
 619    disp->DriverData = NULL;
 620
 621    return EGL_TRUE;
 622 }
 623
 624
 625 /**
 626  * Called via eglCreateContext(), drv->API.CreateContext().
 627  */
 628 static _EGLContext *
 629 dri2_create_context(_EGLDriver *drv, _EGLDisplay *disp, _EGLConfig *conf,
 630                     _EGLContext *share_list, const EGLint *attrib_list)
 631 {
 632    struct dri2_egl_context *dri2_ctx;
 633    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 634    struct dri2_egl_context *dri2_ctx_shared = dri2_egl_context(share_list);
 635    struct dri2_egl_config *dri2_config = dri2_egl_config(conf);
 636
 637    dri2_ctx = malloc(sizeof *dri2_ctx);
 638    if (!dri2_ctx) {
 639       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
 640       return NULL;
 641    }
 642
 643    if (!_eglInitContext(&dri2_ctx->base, disp, conf, attrib_list)) {
 644       free(dri2_ctx);
 645       return NULL;
 646    }
 647
 648    dri2_ctx->dri_context =
 649       dri2_dpy->dri2->createNewContext(dri2_dpy->dri_screen,
 650                                        dri2_config->dri_config,
 651                                        dri2_ctx_shared ?
 652                                        dri2_ctx_shared->dri_context : NULL,
 653                                        dri2_ctx);
 654
 655    if (!dri2_ctx->dri_context) {
 656       free(dri2_ctx);
 657       return NULL;
 658    }
 659
 660    return &dri2_ctx->base;
 661 }
 662
 663 static EGLBoolean
 664 dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 665 {
 666    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 667    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 668
 669    if (_eglIsSurfaceBound(surf))
 670       return EGL_TRUE;
 671
 672    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 673
 674    xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 675
 676    if (surf->Type == EGL_PBUFFER_BIT)
 677       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 678
 679    free(surf);
 680
 681    return EGL_TRUE;
 682 }
 683
 684 /**
 685  * Called via eglMakeCurrent(), drv->API.MakeCurrent().
 686  */
 687 static EGLBoolean
 688 dri2_make_current(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *dsurf,
 689                   _EGLSurface *rsurf, _EGLContext *ctx)
 690 {
 691    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 692    struct dri2_egl_surface *dri2_dsurf = dri2_egl_surface(dsurf);
 693    struct dri2_egl_surface *dri2_rsurf = dri2_egl_surface(rsurf);
 694    struct dri2_egl_context *dri2_ctx = dri2_egl_context(ctx);
 695    __DRIdrawable *ddraw, *rdraw;
 696    __DRIcontext *cctx;
 697
 698    /* bind the new context and return the "orphaned" one */
 699    if (!_eglBindContext(&ctx, &dsurf, &rsurf))
 700       return EGL_FALSE;
 701
 702    ddraw = (dri2_dsurf) ? dri2_dsurf->dri_drawable : NULL;
 703    rdraw = (dri2_rsurf) ? dri2_rsurf->dri_drawable : NULL;
 704    cctx = (dri2_ctx) ? dri2_ctx->dri_context : NULL;
 705
 706    if ((cctx == NULL && ddraw == NULL && rdraw == NULL) ||
 707        dri2_dpy->core->bindContext(cctx, ddraw, rdraw)) {
 708       if (dsurf && !_eglIsSurfaceLinked(dsurf))
 709          dri2_destroy_surface(drv, disp, dsurf);
 710       if (rsurf && rsurf != dsurf && !_eglIsSurfaceLinked(dsurf))
 711          dri2_destroy_surface(drv, disp, rsurf);
 712       if (ctx != NULL && !_eglIsContextLinked(ctx))
 713          dri2_dpy->core->unbindContext(dri2_egl_context(ctx)->dri_context);
 714
 715       return EGL_TRUE;
 716    } else {
 717       _eglBindContext(&ctx, &dsurf, &rsurf);
 718
 719       return EGL_FALSE;
 720    }
 721 }
 722
 723 /**
 724  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 725  */
 726 static _EGLSurface *
 727 dri2_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 728                     _EGLConfig *conf, EGLNativeWindowType window,
 729                     const EGLint *attrib_list)
 730 {
 731    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 732    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 733    struct dri2_egl_surface *dri2_surf;
 734    xcb_get_geometry_cookie_t cookie;
 735    xcb_get_geometry_reply_t *reply;
 736    xcb_screen_iterator_t s;
 737    xcb_generic_error_t *error;
 738
 739    dri2_surf = malloc(sizeof *dri2_surf);
 740    if (!dri2_surf) {
 741       _eglError(EGL_BAD_ALLOC, "eglCreateWindowSurface");
 742       return NULL;
 743    }
 744
 745    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list)) {
 746       free(dri2_surf);
 747       return NULL;
 748    }
 749
 750    dri2_surf->region = XCB_NONE;
 751    if (type == EGL_PBUFFER_BIT) {
 752       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 753       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 754       xcb_create_pixmap(dri2_dpy->conn,
 755                         _eglGetConfigKey(conf, EGL_BUFFER_SIZE),
 756                         dri2_surf->drawable, s.data->root,
 757                         dri2_surf->base.Width, dri2_surf->base.Height);
 758    } else {
 759       dri2_surf->drawable = window;
 760    }
 761
 762    dri2_surf->dri_drawable =
 763       (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 764                                             dri2_conf->dri_config, dri2_surf);
 765    if (dri2_surf == NULL) {
 766       _eglError(EGL_BAD_ALLOC, "eglCreateWindowSurface");
 767       free(dri2_surf);
 768       return NULL;
 769    }
 770
 771    xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 772
 773    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 774    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 775    if (reply == NULL || error != NULL) {
 776       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 777       free(dri2_surf);
 778       free(error);
 779       return NULL;
 780    }
 781    dri2_surf->base.Width = reply->width;
 782    dri2_surf->base.Height = reply->height;
 783    free(reply);
 784
 785    return &dri2_surf->base;
 786 }
 787
 788 /**
 789  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 790  */
 791 static _EGLSurface *
 792 dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 793                            _EGLConfig *conf, EGLNativeWindowType window,
 794                            const EGLint *attrib_list)
 795 {
 796    return dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 797                               window, attrib_list);
 798 }
 799
 800 static _EGLSurface *
 801 dri2_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 802                            _EGLConfig *conf, EGLNativePixmapType pixmap,
 803                            const EGLint *attrib_list)
 804 {
 805    return dri2_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 806                               pixmap, attrib_list);
 807 }
 808
 809 static _EGLSurface *
 810 dri2_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 811                             _EGLConfig *conf, const EGLint *attrib_list)
 812 {
 813    return dri2_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 814                               XCB_WINDOW_NONE, attrib_list);
 815 }
 816
 817 static EGLBoolean
 818 dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 819 {
 820    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 821    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 822    xcb_dri2_copy_region_cookie_t cookie;
 823
 824    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 825
 826 #if 0
 827    /* FIXME: Add support for dri swapbuffers, that'll give us swap
 828     * interval and page flipping (at least for fullscreen windows) as
 829     * well as the page flip event. */
 830 #if __DRI2_FLUSH_VERSION >= 2
 831    if (pdraw->psc->f)
 832       (*pdraw->psc->f->flushInvalidate)(pdraw->driDrawable);
 833 #endif
 834 #endif
 835
 836    if (!dri2_surf->have_back)
 837       return EGL_TRUE;
 838
 839    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 840                                            dri2_surf->drawable,
 841                                            dri2_surf->region,
 842                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 843                                            XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT);
 844    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 845
 846    return EGL_TRUE;
 847 }
 848
 849 /*
 850  * Called from eglGetProcAddress() via drv->API.GetProcAddress().
 851  */
 852 static _EGLProc
 853 dri2_get_proc_address(_EGLDriver *drv, const char *procname)
 854 {
 855    /* FIXME: Do we need to support lookup of EGL symbols too? */
 856
 857    return (_EGLProc) _glapi_get_proc_address(procname);
 858 }
 859
 860 static EGLBoolean
 861 dri2_wait_client(_EGLDriver *drv, _EGLDisplay *disp, _EGLContext *ctx)
 862 {
 863    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 864    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(ctx->DrawSurface);
 865
 866    /* FIXME: If EGL allows frontbuffer rendering for window surfaces,
 867     * we need to copy fake to real here.*/
 868
 869    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 870
 871    return EGL_TRUE;
 872 }
 873
 874 static EGLBoolean
 875 dri2_wait_native(_EGLDriver *drv, _EGLDisplay *disp, EGLint engine)
 876 {
 877    if (engine != EGL_CORE_NATIVE_ENGINE)
 878       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
 879    /* glXWaitX(); */
 880
 881    return EGL_TRUE;
 882 }
 883
 884 static void
 885 dri2_unload(_EGLDriver *drv)
 886 {
 887    struct dri2_egl_driver *dri2_drv = dri2_egl_driver(drv);
 888    free(dri2_drv);
 889 }
 890
 891 static EGLBoolean
 892 dri2_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 893                   EGLNativePixmapType target)
 894 {
 895    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 896    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 897    xcb_gcontext_t gc;
 898
 899    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 900
 901    gc = xcb_generate_id(dri2_dpy->conn);
 902    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 903    xcb_copy_area(dri2_dpy->conn,
 904                   dri2_surf->drawable,
 905                   target,
 906                   gc,
 907                   0, 0,
 908                   0, 0,
 909                   dri2_surf->base.Width,
 910                   dri2_surf->base.Height);
 911    xcb_free_gc(dri2_dpy->conn, gc);
 912
 913    return EGL_TRUE;
 914 }
 915
 916 /**
 917  * This is the main entrypoint into the driver, called by libEGL.
 918  * Create a new _EGLDriver object and init its dispatch table.
 919  */
 920 _EGLDriver *
 921 _eglMain(const char *args)
 922 {
 923    struct dri2_egl_driver *dri2_drv;
 924
 925    dri2_drv = malloc(sizeof *dri2_drv);
 926    if (!dri2_drv)
 927       return NULL;
 928
 929    _eglInitDriverFallbacks(&dri2_drv->base);
 930    dri2_drv->base.API.Initialize = dri2_initialize;
 931    dri2_drv->base.API.Terminate = dri2_terminate;
 932    dri2_drv->base.API.CreateContext = dri2_create_context;
 933    dri2_drv->base.API.MakeCurrent = dri2_make_current;
 934    dri2_drv->base.API.CreateWindowSurface = dri2_create_window_surface;
 935    dri2_drv->base.API.CreatePixmapSurface = dri2_create_pixmap_surface;
 936    dri2_drv->base.API.CreatePbufferSurface = dri2_create_pbuffer_surface;
 937    dri2_drv->base.API.DestroySurface = dri2_destroy_surface;
 938    dri2_drv->base.API.SwapBuffers = dri2_swap_buffers;
 939    dri2_drv->base.API.GetProcAddress = dri2_get_proc_address;
 940    dri2_drv->base.API.WaitClient = dri2_wait_client;
 941    dri2_drv->base.API.WaitNative = dri2_wait_native;
 942    dri2_drv->base.API.CopyBuffers = dri2_copy_buffers;
 943
 944    dri2_drv->base.Name = "DRI2";
 945    dri2_drv->base.Unload = dri2_unload;
 946
 947    return &dri2_drv->base;
 948 }