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 static struct dri2_egl_driver *
 101 dri2_egl_driver(_EGLDriver *drv)
 102 {
 103    return (struct dri2_egl_driver *) drv;
 104 }
 105
 106 static struct dri2_egl_display *
 107 dri2_egl_display(_EGLDisplay *dpy)
 108 {
 109    return (struct dri2_egl_display *) dpy->DriverData;
 110 }
 111
 112 static struct dri2_egl_context *
 113 dri2_egl_context(_EGLContext *ctx)
 114 {
 115    return (struct dri2_egl_context *) ctx;
 116 }
 117
 118 static struct dri2_egl_surface *
 119 dri2_egl_surface(_EGLSurface *surf)
 120 {
 121    return (struct dri2_egl_surface *) surf;
 122 }
 123
 124 static struct dri2_egl_config *
 125 dri2_egl_config(_EGLConfig *conf)
 126 {
 127    return (struct dri2_egl_config *) conf;
 128 }
 129
 130 EGLint dri2_to_egl_attribute_map[] = {
 131    0,
 132    EGL_BUFFER_SIZE,             /* __DRI_ATTRIB_BUFFER_SIZE */
 133    EGL_LEVEL,                   /* __DRI_ATTRIB_LEVEL */
 134    EGL_RED_SIZE,                /* __DRI_ATTRIB_RED_SIZE */
 135    EGL_GREEN_SIZE,              /* __DRI_ATTRIB_GREEN_SIZE */
 136    EGL_BLUE_SIZE,               /* __DRI_ATTRIB_BLUE_SIZE */
 137    0,                           /* __DRI_ATTRIB_LUMINANCE_SIZE */
 138    EGL_ALPHA_SIZE,              /* __DRI_ATTRIB_ALPHA_SIZE */
 139    0,                           /* __DRI_ATTRIB_ALPHA_MASK_SIZE */
 140    EGL_DEPTH_SIZE,              /* __DRI_ATTRIB_DEPTH_SIZE */
 141    EGL_STENCIL_SIZE,            /* __DRI_ATTRIB_STENCIL_SIZE */
 142    0,                           /* __DRI_ATTRIB_ACCUM_RED_SIZE */
 143    0,                           /* __DRI_ATTRIB_ACCUM_GREEN_SIZE */
 144    0,                           /* __DRI_ATTRIB_ACCUM_BLUE_SIZE */
 145    0,                           /* __DRI_ATTRIB_ACCUM_ALPHA_SIZE */
 146    EGL_SAMPLE_BUFFERS,          /* __DRI_ATTRIB_SAMPLE_BUFFERS */
 147    EGL_SAMPLES,                 /* __DRI_ATTRIB_SAMPLES */
 148    0,                           /* __DRI_ATTRIB_RENDER_TYPE, */
 149    0,                           /* __DRI_ATTRIB_CONFIG_CAVEAT */
 150    0,                           /* __DRI_ATTRIB_CONFORMANT */
 151    0,                           /* __DRI_ATTRIB_DOUBLE_BUFFER */
 152    0,                           /* __DRI_ATTRIB_STEREO */
 153    0,                           /* __DRI_ATTRIB_AUX_BUFFERS */
 154    0,                           /* __DRI_ATTRIB_TRANSPARENT_TYPE */
 155    0,                           /* __DRI_ATTRIB_TRANSPARENT_INDEX_VALUE */
 156    0,                           /* __DRI_ATTRIB_TRANSPARENT_RED_VALUE */
 157    0,                           /* __DRI_ATTRIB_TRANSPARENT_GREEN_VALUE */
 158    0,                           /* __DRI_ATTRIB_TRANSPARENT_BLUE_VALUE */
 159    0,                           /* __DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE */
 160    0,                           /* __DRI_ATTRIB_FLOAT_MODE */
 161    0,                           /* __DRI_ATTRIB_RED_MASK */
 162    0,                           /* __DRI_ATTRIB_GREEN_MASK */
 163    0,                           /* __DRI_ATTRIB_BLUE_MASK */
 164    0,                           /* __DRI_ATTRIB_ALPHA_MASK */
 165    EGL_MAX_PBUFFER_WIDTH,       /* __DRI_ATTRIB_MAX_PBUFFER_WIDTH */
 166    EGL_MAX_PBUFFER_HEIGHT,      /* __DRI_ATTRIB_MAX_PBUFFER_HEIGHT */
 167    EGL_MAX_PBUFFER_PIXELS,      /* __DRI_ATTRIB_MAX_PBUFFER_PIXELS */
 168    0,                           /* __DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH */
 169    0,                           /* __DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT */
 170    0,                           /* __DRI_ATTRIB_VISUAL_SELECT_GROUP */
 171    0,                           /* __DRI_ATTRIB_SWAP_METHOD */
 172    EGL_MAX_SWAP_INTERVAL,       /* __DRI_ATTRIB_MAX_SWAP_INTERVAL */
 173    EGL_MIN_SWAP_INTERVAL,       /* __DRI_ATTRIB_MIN_SWAP_INTERVAL */
 174    0,                           /* __DRI_ATTRIB_BIND_TO_TEXTURE_RGB */
 175    0,                           /* __DRI_ATTRIB_BIND_TO_TEXTURE_RGBA */
 176    0,                           /* __DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE */
 177    0,                           /* __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS */
 178    0,                           /* __DRI_ATTRIB_YINVERTED */
 179 };
 180
 181 static void
 182 dri2_add_config(_EGLDisplay *disp, const __DRIconfig *dri_config, int id)
 183 {
 184    struct dri2_egl_config *conf;
 185    struct dri2_egl_display *dri2_dpy;
 186    unsigned int attrib, value, double_buffer;
 187    EGLint key, bind_to_texture_rgb, bind_to_texture_rgba;
 188    int i;
 189
 190    dri2_dpy = disp->DriverData;
 191    conf = malloc(sizeof *conf);
 192    if (conf == NULL)
 193       return;
 194
 195    conf->dri_config = dri_config;
 196    _eglInitConfig(&conf->base, disp, id);
 197
 198    i = 0;
 199    while (dri2_dpy->core->indexConfigAttrib(dri_config, i++, &attrib, &value)) {
 200       switch (attrib) {
 201       case 0:
 202          break;
 203
 204       case __DRI_ATTRIB_RENDER_TYPE:
 205          if (value & __DRI_ATTRIB_RGBA_BIT)
 206             value = EGL_RGB_BUFFER;
 207          else if (value & __DRI_ATTRIB_LUMINANCE_BIT)
 208             value = EGL_LUMINANCE_BUFFER;
 209          else
 210             /* not valid */;
 211          _eglSetConfigKey(&conf->base, EGL_COLOR_BUFFER_TYPE, value);
 212          break;
 213
 214       case __DRI_ATTRIB_CONFIG_CAVEAT:
 215          if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
 216             value = EGL_NON_CONFORMANT_CONFIG;
 217          else if (value & __DRI_ATTRIB_SLOW_BIT)
 218             value = EGL_SLOW_CONFIG;
 219          else
 220             value = EGL_NONE;
 221          _eglSetConfigKey(&conf->base, EGL_CONFIG_CAVEAT, value);
 222          break;
 223
 224       case __DRI_ATTRIB_BIND_TO_TEXTURE_RGB:
 225          bind_to_texture_rgb = value;
 226          break;
 227
 228       case __DRI_ATTRIB_BIND_TO_TEXTURE_RGBA:
 229          bind_to_texture_rgba = value;
 230          break;
 231
 232       case __DRI_ATTRIB_DOUBLE_BUFFER:
 233          double_buffer = value;
 234          break;
 235
 236       default:
 237          key = dri2_to_egl_attribute_map[attrib];
 238          if (key != 0)
 239             _eglSetConfigKey(&conf->base, key, value);
 240          break;
 241       }
 242    }
 243
 244    /* EGL_SWAP_BEHAVIOR_PRESERVED_BIT */
 245
 246    if (double_buffer) {
 247       /* FIXME: Figure out how to get the visual ID and types */
 248       _eglSetConfigKey(&conf->base, EGL_SURFACE_TYPE, EGL_WINDOW_BIT);
 249       _eglSetConfigKey(&conf->base, EGL_NATIVE_VISUAL_ID, 0x21);
 250       _eglSetConfigKey(&conf->base, EGL_NATIVE_VISUAL_TYPE,
 251                        XCB_VISUAL_CLASS_TRUE_COLOR);
 252    } else {
 253       _eglSetConfigKey(&conf->base,
 254                        EGL_SURFACE_TYPE, EGL_PIXMAP_BIT | EGL_PBUFFER_BIT);
 255       _eglSetConfigKey(&conf->base,
 256                        EGL_BIND_TO_TEXTURE_RGB, bind_to_texture_rgb);
 257       _eglSetConfigKey(&conf->base,
 258                        EGL_BIND_TO_TEXTURE_RGBA, bind_to_texture_rgba);
 259    }
 260
 261    /* EGL_OPENGL_ES_BIT, EGL_OPENVG_BIT, EGL_OPENGL_ES2_BIT */
 262    _eglSetConfigKey(&conf->base, EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT);
 263    _eglSetConfigKey(&conf->base, EGL_CONFORMANT, EGL_OPENGL_BIT);
 264
 265    if (!_eglValidateConfig(&conf->base, EGL_FALSE)) {
 266       _eglLog(_EGL_DEBUG, "DRI2: failed to validate config %d", id);
 267       free(conf);
 268       return;
 269    }
 270
 271    _eglAddConfig(disp, &conf->base);
 272 }
 273
 274 /**
 275  * Process list of buffer received from the server
 276  *
 277  * Processes the list of buffers received in a reply from the server to either
 278  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 279  */
 280 static void
 281 dri2_process_buffers(struct dri2_egl_surface *dri2_surf,
 282                      xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 283 {
 284    struct dri2_egl_display *dri2_dpy =
 285       dri2_egl_display(dri2_surf->base.Resource.Display);
 286    xcb_rectangle_t rectangle;
 287    int i;
 288
 289    dri2_surf->buffer_count = count;
 290    dri2_surf->have_fake_front = 0;
 291    dri2_surf->have_back = 0;
 292
 293    /* This assumes the DRI2 buffer attachment tokens matches the
 294     * __DRIbuffer tokens. */
 295    for (i = 0; i < count; i++) {
 296       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 297       dri2_surf->buffers[i].name = buffers[i].name;
 298       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 299       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 300       dri2_surf->buffers[i].flags = buffers[i].flags;
 301       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 302          dri2_surf->have_fake_front = 1;
 303       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 304          dri2_surf->have_back = 1;
 305    }
 306
 307    if (dri2_surf->region != XCB_NONE)
 308       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 309
 310    rectangle.x = 0;
 311    rectangle.y = 0;
 312    rectangle.width = dri2_surf->base.Width;
 313    rectangle.height = dri2_surf->base.Height;
 314    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 315    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 316 }
 317
 318 static __DRIbuffer *
 319 dri2_get_buffers(__DRIdrawable * driDrawable,
 320                 int *width, int *height,
 321                 unsigned int *attachments, int count,
 322                 int *out_count, void *loaderPrivate)
 323 {
 324    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 325    struct dri2_egl_display *dri2_dpy =
 326       dri2_egl_display(dri2_surf->base.Resource.Display);
 327    xcb_dri2_dri2_buffer_t *buffers;
 328    xcb_dri2_get_buffers_reply_t *reply;
 329    xcb_dri2_get_buffers_cookie_t cookie;
 330
 331    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 332                                             dri2_surf->drawable,
 333                                             count, count, attachments);
 334    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 335    buffers = xcb_dri2_get_buffers_buffers (reply);
 336    if (buffers == NULL)
 337       return NULL;
 338
 339    *out_count = reply->count;
 340    dri2_surf->base.Width = *width = reply->width;
 341    dri2_surf->base.Height = *height = reply->height;
 342    dri2_process_buffers(dri2_surf, buffers, *out_count);
 343
 344    free(reply);
 345
 346    return dri2_surf->buffers;
 347 }
 348
 349 static void
 350 dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 351 {
 352    /* FIXME: Does EGL support front buffer rendering at all? */
 353
 354 #if 0
 355    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 356
 357    dri2WaitGL(dri2_surf);
 358 #endif
 359 }
 360
 361 static __DRIbuffer *
 362 dri2_get_buffers_with_format(__DRIdrawable * driDrawable,
 363                              int *width, int *height,
 364                              unsigned int *attachments, int count,
 365                              int *out_count, void *loaderPrivate)
 366 {
 367    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 368    struct dri2_egl_display *dri2_dpy =
 369       dri2_egl_display(dri2_surf->base.Resource.Display);
 370    xcb_dri2_dri2_buffer_t *buffers;
 371    xcb_dri2_get_buffers_with_format_reply_t *reply;
 372    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 373    xcb_dri2_attach_format_t *format_attachments;
 374
 375    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 376    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 377                                                         dri2_surf->drawable,
 378                                                         count, count,
 379                                                         format_attachments);
 380
 381    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 382                                                    cookie, NULL);
 383    if (reply == NULL)
 384       return NULL;
 385
 386    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 387    dri2_surf->base.Width = *width = reply->width;
 388    dri2_surf->base.Height = *height = reply->height;
 389    *out_count = reply->count;
 390    dri2_process_buffers(dri2_surf, buffers, *out_count);
 391
 392    free(reply);
 393
 394    return dri2_surf->buffers;
 395 }
 396
 397 #ifdef GLX_USE_TLS
 398 static const char dri_driver_format[] = "%.*s/tls/%.*s_dri.so";
 399 #else
 400 static const char dri_driver_format[] = "%.*s/%.*s_dri.so";
 401 #endif
 402
 403 static const char dri_driver_path[] = DEFAULT_DRIVER_DIR;
 404
 405 /**
 406  * Called via eglInitialize(), GLX_drv->API.Initialize().
 407  */
 408 static EGLBoolean
 409 dri2_initialize(_EGLDriver *drv, _EGLDisplay *disp,
 410                 EGLint *major, EGLint *minor)
 411 {
 412    const __DRIextension **extensions;
 413    const __DRIconfig **driver_configs;
 414    struct dri2_egl_display *dri2_dpy;
 415    char path[PATH_MAX], *search_paths, *p, *next, *end;
 416    xcb_xfixes_query_version_reply_t *xfixes_query;
 417    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 418    xcb_dri2_query_version_reply_t *dri2_query;
 419    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 420    xcb_dri2_connect_reply_t *connect = NULL;
 421    xcb_dri2_connect_cookie_t connect_cookie;
 422    xcb_dri2_authenticate_reply_t *authenticate;
 423    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 424    xcb_generic_error_t *error;
 425    drm_magic_t magic;
 426    xcb_screen_iterator_t s;
 427    int i;
 428
 429    dri2_dpy = malloc(sizeof *dri2_dpy);
 430    if (!dri2_dpy)
 431       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 432
 433    disp->DriverData = (void *) dri2_dpy;
 434    dri2_dpy->conn = XGetXCBConnection(disp->NativeDisplay);
 435    if (!dri2_dpy->conn) {
 436       dri2_dpy->conn = xcb_connect(0, 0);
 437       if (!dri2_dpy->conn) {
 438          _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
 439          free(dri2_dpy);
 440          return EGL_FALSE;
 441       }
 442    }
 443
 444    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 445    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 446
 447    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 448                                                   XCB_XFIXES_MAJOR_VERSION,
 449                                                   XCB_XFIXES_MINOR_VERSION);
 450
 451    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 452                                                XCB_DRI2_MAJOR_VERSION,
 453                                                XCB_DRI2_MINOR_VERSION);
 454
 455    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 456    connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
 457                                                 s.data->root,
 458                                                 XCB_DRI2_DRIVER_TYPE_DRI);
 459
 460    xfixes_query =
 461       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 462                                       xfixes_query_cookie, &error);
 463    if (xfixes_query == NULL ||
 464        error != NULL || xfixes_query->major_version < 2) {
 465       _eglLog(_EGL_FATAL, "DRI2: failed to query xfixes version");
 466       free(error);
 467       goto handle_error;
 468    }
 469    free(xfixes_query);
 470
 471    dri2_query =
 472       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 473    if (dri2_query == NULL || error != NULL) {
 474       _eglLog(_EGL_FATAL, "DRI2: failed to query version");
 475       free(error);
 476       goto handle_error;
 477    }
 478    dri2_dpy->dri2_major = dri2_query->major_version;
 479    dri2_dpy->dri2_minor = dri2_query->minor_version;
 480    free(dri2_query);
 481
 482    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 483    if (connect->driver_name_length == 0 && connect->device_name_length == 0) {
 484       _eglLog(_EGL_FATAL, "DRI2: failed to authenticate");
 485       goto handle_error;
 486    }
 487
 488    search_paths = NULL;
 489    if (geteuid() == getuid()) {
 490       /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
 491       search_paths = getenv("LIBGL_DRIVERS_PATH");
 492    }
 493    if (search_paths == NULL)
 494       search_paths = DEFAULT_DRIVER_DIR;
 495
 496    dri2_dpy->driver = NULL;
 497    end = search_paths + strlen(search_paths);
 498    for (p = search_paths; p < end && dri2_dpy->driver == NULL; p = next + 1) {
 499       next = strchr(p, ':');
 500       if (next == NULL)
 501          next = end;
 502
 503       snprintf(path, sizeof path,
 504                dri_driver_format,
 505                next - p, p,
 506                xcb_dri2_connect_driver_name_length (connect),
 507                xcb_dri2_connect_driver_name (connect));
 508
 509       dri2_dpy->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 510    }
 511
 512    if (dri2_dpy->driver == NULL) {
 513       _eglLog(_EGL_FATAL,
 514               "DRI2: failed to open any driver (search paths %s)",
 515               search_paths);
 516       goto handle_error;
 517    }
 518
 519    _eglLog(_EGL_DEBUG, "DRI2: dlopen(%s)", path);
 520    extensions = dlsym(dri2_dpy->driver, __DRI_DRIVER_EXTENSIONS);
 521    if (extensions == NULL) {
 522       _eglLog(_EGL_FATAL,
 523               "DRI2: driver exports no extensions (%s)", dlerror());
 524       goto handle_error;
 525    }
 526
 527    for (i = 0; extensions[i]; i++) {
 528       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 529          dri2_dpy->core = (__DRIcoreExtension *) extensions[i];
 530       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 531          dri2_dpy->dri2 = (__DRIdri2Extension *) extensions[i];
 532    }
 533
 534    if (dri2_dpy->core == NULL) {
 535       _eglLog(_EGL_FATAL, "DRI2: driver has no core extension");
 536       goto handle_error;
 537    }
 538
 539    if (dri2_dpy->dri2 == NULL) {
 540       _eglLog(_EGL_FATAL, "DRI2: driver has no dri2 extension");
 541       goto handle_error;
 542    }
 543
 544    snprintf(path, sizeof path, "%.*s",
 545             xcb_dri2_connect_device_name_length (connect),
 546             xcb_dri2_connect_device_name (connect));
 547    dri2_dpy->fd = open (path, O_RDWR);
 548    if (dri2_dpy->fd == -1) {
 549       _eglLog(_EGL_FATAL,
 550               "DRI2: could not open %s (%s)", path, strerror(errno));
 551       goto handle_error;
 552    }
 553
 554    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 555       _eglLog(_EGL_FATAL, "DRI2: failed to get drm magic");
 556       goto handle_error;
 557    }
 558
 559    authenticate_cookie = xcb_dri2_authenticate_unchecked (dri2_dpy->conn,
 560                                                           s.data->root, magic);
 561    authenticate = xcb_dri2_authenticate_reply (dri2_dpy->conn,
 562                                                authenticate_cookie, NULL);
 563    if (authenticate == NULL || !authenticate->authenticated) {
 564       _eglLog(_EGL_FATAL, "DRI2: failed to authenticate");
 565       goto handle_error;
 566    }
 567
 568    if (dri2_dpy->dri2_minor >= 1) {
 569       dri2_dpy->loader_extension.base.name = __DRI_DRI2_LOADER;
 570       dri2_dpy->loader_extension.base.version = 3;
 571       dri2_dpy->loader_extension.getBuffers = dri2_get_buffers;
 572       dri2_dpy->loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
 573       dri2_dpy->loader_extension.getBuffersWithFormat =
 574          dri2_get_buffers_with_format;
 575    } else {
 576       dri2_dpy->loader_extension.base.name = __DRI_DRI2_LOADER;
 577       dri2_dpy->loader_extension.base.version = 2;
 578       dri2_dpy->loader_extension.getBuffers = dri2_get_buffers;
 579       dri2_dpy->loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
 580       dri2_dpy->loader_extension.getBuffersWithFormat = NULL;
 581    }
 582
 583    dri2_dpy->extensions[0] = &dri2_dpy->loader_extension.base;
 584    dri2_dpy->extensions[1] = NULL;
 585
 586    dri2_dpy->dri_screen =
 587       dri2_dpy->dri2->createNewScreen(0, dri2_dpy->fd, dri2_dpy->extensions,
 588                                       &driver_configs, dri2_dpy);
 589
 590    if (dri2_dpy->dri_screen == NULL) {
 591       _eglLog(_EGL_FATAL, "DRI2: failed to create dri screen");
 592       free(dri2_dpy);
 593       goto handle_error;
 594    }
 595
 596    extensions = dri2_dpy->core->getExtensions(dri2_dpy->dri_screen);
 597    for (i = 0; extensions[i]; i++) {
 598       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0))
 599          dri2_dpy->flush = (__DRI2flushExtension *) extensions[i];
 600    }
 601
 602    if (dri2_dpy->flush == NULL) {
 603       _eglLog(_EGL_FATAL, "DRI2: driver doesn't support the flush extension");
 604       free(dri2_dpy);
 605       goto handle_error;
 606    }
 607
 608    for (i = 0; driver_configs[i]; i++)
 609       dri2_add_config(disp, driver_configs[i], i + 1);
 610    if (!disp->NumConfigs) {
 611       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 612       goto handle_error;
 613    }
 614
 615    disp->ClientAPIsMask = EGL_OPENGL_BIT;
 616
 617    /* we're supporting EGL 1.4 */
 618    *major = 1;
 619    *minor = 4;
 620
 621    free (connect);
 622    return EGL_TRUE;
 623
 624  handle_error:
 625    free(connect);
 626    free(dri2_dpy);
 627    return EGL_FALSE;
 628 }
 629
 630 /**
 631  * Called via eglTerminate(), drv->API.Terminate().
 632  */
 633 static EGLBoolean
 634 dri2_terminate(_EGLDriver *drv, _EGLDisplay *disp)
 635 {
 636    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 637
 638    _eglReleaseDisplayResources(drv, disp);
 639    _eglCleanupDisplay(disp);
 640
 641    close(dri2_dpy->fd);
 642    dlclose(dri2_dpy->driver);
 643    free(dri2_dpy);
 644
 645    disp->DriverData = NULL;
 646
 647    return EGL_TRUE;
 648 }
 649
 650
 651 /**
 652  * Called via eglCreateContext(), drv->API.CreateContext().
 653  */
 654 static _EGLContext *
 655 dri2_create_context(_EGLDriver *drv, _EGLDisplay *disp, _EGLConfig *conf,
 656                     _EGLContext *share_list, const EGLint *attrib_list)
 657 {
 658    struct dri2_egl_context *dri2_ctx;
 659    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 660    struct dri2_egl_context *dri2_ctx_shared = dri2_egl_context(share_list);
 661    struct dri2_egl_config *dri2_config = dri2_egl_config(conf);
 662
 663    dri2_ctx = malloc(sizeof *dri2_ctx);
 664    if (!dri2_ctx) {
 665       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
 666       return NULL;
 667    }
 668
 669    if (!_eglInitContext(&dri2_ctx->base, disp, conf, attrib_list)) {
 670       free(dri2_ctx);
 671       return NULL;
 672    }
 673
 674    dri2_ctx->dri_context =
 675       dri2_dpy->dri2->createNewContext(dri2_dpy->dri_screen,
 676                                        dri2_config->dri_config,
 677                                        dri2_ctx_shared ?
 678                                        dri2_ctx_shared->dri_context : NULL,
 679                                        dri2_ctx);
 680
 681    if (!dri2_ctx->dri_context) {
 682       free(dri2_ctx);
 683       return NULL;
 684    }
 685
 686    return &dri2_ctx->base;
 687 }
 688
 689 static EGLBoolean
 690 dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 691 {
 692    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 693    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 694
 695    if (_eglIsSurfaceBound(surf))
 696       return EGL_TRUE;
 697
 698    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 699
 700    xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 701
 702    if (surf->Type == EGL_PBUFFER_BIT)
 703       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 704
 705    free(surf);
 706
 707    return EGL_TRUE;
 708 }
 709
 710 /**
 711  * Called via eglMakeCurrent(), drv->API.MakeCurrent().
 712  */
 713 static EGLBoolean
 714 dri2_make_current(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *dsurf,
 715                   _EGLSurface *rsurf, _EGLContext *ctx)
 716 {
 717    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 718    struct dri2_egl_surface *dri2_dsurf = dri2_egl_surface(dsurf);
 719    struct dri2_egl_surface *dri2_rsurf = dri2_egl_surface(rsurf);
 720    struct dri2_egl_context *dri2_ctx = dri2_egl_context(ctx);
 721    __DRIdrawable *ddraw, *rdraw;
 722    __DRIcontext *cctx;
 723
 724    /* bind the new context and return the "orphaned" one */
 725    if (!_eglBindContext(&ctx, &dsurf, &rsurf))
 726       return EGL_FALSE;
 727
 728    ddraw = (dri2_dsurf) ? dri2_dsurf->dri_drawable : NULL;
 729    rdraw = (dri2_rsurf) ? dri2_rsurf->dri_drawable : NULL;
 730    cctx = (dri2_ctx) ? dri2_ctx->dri_context : NULL;
 731
 732    if ((cctx == NULL && ddraw == NULL && rdraw == NULL) ||
 733        dri2_dpy->core->bindContext(cctx, ddraw, rdraw)) {
 734       if (dsurf)
 735          dri2_destroy_surface(drv, disp, dsurf);
 736       if (rsurf && rsurf != dsurf)
 737          dri2_destroy_surface(drv, disp, rsurf);
 738       if (ctx != NULL)
 739          dri2_dpy->core->unbindContext(dri2_egl_context(ctx)->dri_context);
 740
 741       return EGL_TRUE;
 742    } else {
 743       _eglBindContext(&ctx, &dsurf, &rsurf);
 744
 745       return EGL_FALSE;
 746    }
 747 }
 748
 749 /**
 750  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 751  */
 752 static _EGLSurface *
 753 dri2_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 754                     _EGLConfig *conf, EGLNativeWindowType window,
 755                     const EGLint *attrib_list)
 756 {
 757    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 758    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 759    struct dri2_egl_surface *dri2_surf;
 760    xcb_get_geometry_cookie_t cookie;
 761    xcb_get_geometry_reply_t *reply;
 762    xcb_screen_iterator_t s;
 763    xcb_generic_error_t *error;
 764
 765    dri2_surf = malloc(sizeof *dri2_surf);
 766    if (!dri2_surf) {
 767       _eglError(EGL_BAD_ALLOC, "eglCreateWindowSurface");
 768       return NULL;
 769    }
 770
 771    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list)) {
 772       free(dri2_surf);
 773       return NULL;
 774    }
 775
 776    dri2_surf->region = XCB_NONE;
 777    if (type == EGL_PBUFFER_BIT) {
 778       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 779       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 780       xcb_create_pixmap(dri2_dpy->conn,
 781                         _eglGetConfigKey(conf, EGL_BUFFER_SIZE),
 782                         dri2_surf->drawable, s.data->root,
 783                         dri2_surf->base.Width, dri2_surf->base.Height);
 784    } else {
 785       dri2_surf->drawable = window;
 786    }
 787
 788    dri2_surf->dri_drawable =
 789       (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 790                                             dri2_conf->dri_config, dri2_surf);
 791    if (dri2_surf == NULL) {
 792       _eglError(EGL_BAD_ALLOC, "eglCreateWindowSurface");
 793       free(dri2_surf);
 794       return NULL;
 795    }
 796
 797    xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 798
 799    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 800    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 801    if (reply == NULL || error != NULL) {
 802       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 803       free(dri2_surf);
 804       free(error);
 805       return NULL;
 806    }
 807    dri2_surf->base.Width = reply->width;
 808    dri2_surf->base.Height = reply->height;
 809    free(reply);
 810
 811    return &dri2_surf->base;
 812 }
 813
 814 /**
 815  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 816  */
 817 static _EGLSurface *
 818 dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 819                            _EGLConfig *conf, EGLNativeWindowType window,
 820                            const EGLint *attrib_list)
 821 {
 822    return dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 823                               window, attrib_list);
 824 }
 825
 826 static _EGLSurface *
 827 dri2_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 828                            _EGLConfig *conf, EGLNativePixmapType pixmap,
 829                            const EGLint *attrib_list)
 830 {
 831    return dri2_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 832                               pixmap, attrib_list);
 833 }
 834
 835 static _EGLSurface *
 836 dri2_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 837                             _EGLConfig *conf, const EGLint *attrib_list)
 838 {
 839    return dri2_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 840                               XCB_WINDOW_NONE, attrib_list);
 841 }
 842
 843 static EGLBoolean
 844 dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 845 {
 846    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 847    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 848    xcb_dri2_copy_region_cookie_t cookie;
 849
 850    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 851
 852 #if 0
 853    /* FIXME: Add support for dri swapbuffers, that'll give us swap
 854     * interval and page flipping (at least for fullscreen windows) as
 855     * well as the page flip event. */
 856 #if __DRI2_FLUSH_VERSION >= 2
 857    if (pdraw->psc->f)
 858       (*pdraw->psc->f->flushInvalidate)(pdraw->driDrawable);
 859 #endif
 860 #endif
 861
 862    if (!dri2_surf->have_back)
 863       return EGL_TRUE;
 864
 865    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 866                                            dri2_surf->drawable,
 867                                            dri2_surf->region,
 868                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 869                                            XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT);
 870    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 871
 872    return EGL_TRUE;
 873 }
 874
 875 /*
 876  * Called from eglGetProcAddress() via drv->API.GetProcAddress().
 877  */
 878 static _EGLProc
 879 dri2_get_proc_address(_EGLDriver *drv, const char *procname)
 880 {
 881    /* FIXME: Do we need to support lookup of EGL symbols too? */
 882
 883    return (_EGLProc) _glapi_get_proc_address(procname);
 884 }
 885
 886 static EGLBoolean
 887 dri2_wait_client(_EGLDriver *drv, _EGLDisplay *disp, _EGLContext *ctx)
 888 {
 889    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 890    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(ctx->DrawSurface);
 891
 892    /* FIXME: If EGL allows frontbuffer rendering for window surfaces,
 893     * we need to copy fake to real here.*/
 894
 895    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 896
 897    return EGL_TRUE;
 898 }
 899
 900 static EGLBoolean
 901 dri2_wait_native(_EGLDriver *drv, _EGLDisplay *disp, EGLint engine)
 902 {
 903    if (engine != EGL_CORE_NATIVE_ENGINE)
 904       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
 905    /* glXWaitX(); */
 906
 907    return EGL_TRUE;
 908 }
 909
 910 static void
 911 dri2_unload(_EGLDriver *drv)
 912 {
 913    struct dri2_egl_driver *dri2_drv = dri2_egl_driver(drv);
 914    free(dri2_drv);
 915 }
 916
 917 static EGLBoolean
 918 dri2_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 919                   EGLNativePixmapType target)
 920 {
 921    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 922    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 923    xcb_gcontext_t gc;
 924
 925    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 926
 927    gc = xcb_generate_id(dri2_dpy->conn);
 928    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 929    xcb_copy_area(dri2_dpy->conn,
 930                   dri2_surf->drawable,
 931                   target,
 932                   gc,
 933                   0, 0,
 934                   0, 0,
 935                   dri2_surf->base.Width,
 936                   dri2_surf->base.Height);
 937    xcb_free_gc(dri2_dpy->conn, gc);
 938
 939    return EGL_TRUE;
 940 }
 941
 942 /**
 943  * This is the main entrypoint into the driver, called by libEGL.
 944  * Create a new _EGLDriver object and init its dispatch table.
 945  */
 946 _EGLDriver *
 947 _eglMain(const char *args)
 948 {
 949    struct dri2_egl_driver *dri2_drv;
 950
 951    dri2_drv = malloc(sizeof *dri2_drv);
 952    if (!dri2_drv)
 953       return NULL;
 954
 955    _eglInitDriverFallbacks(&dri2_drv->base);
 956    dri2_drv->base.API.Initialize = dri2_initialize;
 957    dri2_drv->base.API.Terminate = dri2_terminate;
 958    dri2_drv->base.API.CreateContext = dri2_create_context;
 959    dri2_drv->base.API.MakeCurrent = dri2_make_current;
 960    dri2_drv->base.API.CreateWindowSurface = dri2_create_window_surface;
 961    dri2_drv->base.API.CreatePixmapSurface = dri2_create_pixmap_surface;
 962    dri2_drv->base.API.CreatePbufferSurface = dri2_create_pbuffer_surface;
 963    dri2_drv->base.API.DestroySurface = dri2_destroy_surface;
 964    dri2_drv->base.API.SwapBuffers = dri2_swap_buffers;
 965    dri2_drv->base.API.GetProcAddress = dri2_get_proc_address;
 966    dri2_drv->base.API.WaitClient = dri2_wait_client;
 967    dri2_drv->base.API.WaitNative = dri2_wait_native;
 968    dri2_drv->base.API.CopyBuffers = dri2_copy_buffers;
 969
 970    dri2_drv->base.Name = "DRI2";
 971    dri2_drv->base.Unload = dri2_unload;
 972
 973    return &dri2_drv->base;
 974 }