src/gallium/state_trackers/egl/common/egl_g3d.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.8
   4  *
   5  * Copyright (C) 2009-2010 Chia-I Wu <olv@0xlab.org>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "egldriver.h"
  27 #include "eglcurrent.h"
  28 #include "egllog.h"
  29
  30 #include "pipe/p_screen.h"
  31 #include "util/u_memory.h"
  32 #include "util/u_format.h"
  33 #include "util/u_string.h"
  34
  35 #include "egl_g3d.h"
  36 #include "egl_g3d_api.h"
  37 #include "egl_g3d_st.h"
  38 #include "egl_g3d_loader.h"
  39 #include "native.h"
  40
  41 /**
  42  * Get the native platform.
  43  */
  44 static const struct native_platform *
  45 egl_g3d_get_platform(_EGLDriver *drv, _EGLPlatformType plat)
  46 {
  47    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
  48
  49    if (!gdrv->platforms[plat]) {
  50       const char *plat_name = NULL;
  51       const struct native_platform *nplat = NULL;
  52
  53       switch (plat) {
  54       case _EGL_PLATFORM_WINDOWS:
  55          plat_name = "Windows";
  56 #ifdef HAVE_GDI_BACKEND
  57          nplat = native_get_gdi_platform();
  58 #endif
  59          break;
  60       case _EGL_PLATFORM_X11:
  61          plat_name = "X11";
  62 #ifdef HAVE_X11_BACKEND
  63          nplat = native_get_x11_platform();
  64 #endif
  65          break;
  66       case _EGL_PLATFORM_DRM:
  67          plat_name = "DRM";
  68 #ifdef HAVE_DRM_BACKEND
  69          nplat = native_get_drm_platform();
  70 #endif
  71          break;
  72       case _EGL_PLATFORM_FBDEV:
  73          plat_name = "FBDEV";
  74 #ifdef HAVE_FBDEV_BACKEND
  75          nplat = native_get_fbdev_platform();
  76 #endif
  77          break;
  78       default:
  79          break;
  80       }
  81
  82       if (!nplat)
  83          _eglLog(_EGL_WARNING, "unsupported platform %s", plat_name);
  84
  85       gdrv->platforms[plat] = nplat;
  86    }
  87
  88    return gdrv->platforms[plat];
  89 }
  90
  91 #ifdef EGL_MESA_screen_surface
  92
  93 static void
  94 egl_g3d_add_screens(_EGLDriver *drv, _EGLDisplay *dpy)
  95 {
  96    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
  97    const struct native_connector **native_connectors;
  98    EGLint num_connectors, i;
  99
 100    native_connectors =
 101       gdpy->native->modeset->get_connectors(gdpy->native, &num_connectors, NULL);
 102    if (!num_connectors) {
 103       if (native_connectors)
 104          FREE(native_connectors);
 105       return;
 106    }
 107
 108    for (i = 0; i < num_connectors; i++) {
 109       const struct native_connector *nconn = native_connectors[i];
 110       struct egl_g3d_screen *gscr;
 111       const struct native_mode **native_modes;
 112       EGLint num_modes, j;
 113
 114       /* TODO support for hotplug */
 115       native_modes =
 116          gdpy->native->modeset->get_modes(gdpy->native, nconn, &num_modes);
 117       if (!num_modes) {
 118          if (native_modes)
 119             FREE(native_modes);
 120          continue;
 121       }
 122
 123       gscr = CALLOC_STRUCT(egl_g3d_screen);
 124       if (!gscr) {
 125          FREE(native_modes);
 126          continue;
 127       }
 128
 129       _eglInitScreen(&gscr->base, dpy, num_modes);
 130       for (j = 0; j < gscr->base.NumModes; j++) {
 131          const struct native_mode *nmode = native_modes[j];
 132          _EGLMode *mode = &gscr->base.Modes[j];
 133
 134          mode->Width = nmode->width;
 135          mode->Height = nmode->height;
 136          mode->RefreshRate = nmode->refresh_rate;
 137          mode->Optimal = EGL_FALSE;
 138          mode->Interlaced = EGL_FALSE;
 139          /* no need to strdup() */
 140          mode->Name = nmode->desc;
 141       }
 142
 143       gscr->native = nconn;
 144       gscr->native_modes = native_modes;
 145
 146       _eglLinkScreen(&gscr->base);
 147    }
 148
 149    FREE(native_connectors);
 150 }
 151
 152 #endif /* EGL_MESA_screen_surface */
 153
 154 /**
 155  * Initialize and validate the EGL config attributes.
 156  */
 157 static EGLBoolean
 158 init_config_attributes(_EGLConfig *conf, const struct native_config *nconf,
 159                        EGLint api_mask, enum pipe_format depth_stencil_format,
 160                        EGLBoolean preserve_buffer, EGLint max_swap_interval)
 161 {
 162    uint rgba[4], depth_stencil[2], buffer_size;
 163    EGLint surface_type;
 164    EGLint i;
 165
 166    /* get the color and depth/stencil component sizes */
 167    assert(nconf->color_format != PIPE_FORMAT_NONE);
 168    buffer_size = 0;
 169    for (i = 0; i < 4; i++) {
 170       rgba[i] = util_format_get_component_bits(nconf->color_format,
 171             UTIL_FORMAT_COLORSPACE_RGB, i);
 172       buffer_size += rgba[i];
 173    }
 174    for (i = 0; i < 2; i++) {
 175       if (depth_stencil_format != PIPE_FORMAT_NONE) {
 176          depth_stencil[i] =
 177             util_format_get_component_bits(depth_stencil_format,
 178                UTIL_FORMAT_COLORSPACE_ZS, i);
 179       }
 180       else {
 181          depth_stencil[i] = 0;
 182       }
 183    }
 184
 185    surface_type = 0x0;
 186    if (nconf->window_bit)
 187       surface_type |= EGL_WINDOW_BIT;
 188    if (nconf->pixmap_bit)
 189       surface_type |= EGL_PIXMAP_BIT;
 190 #ifdef EGL_MESA_screen_surface
 191    if (nconf->scanout_bit)
 192       surface_type |= EGL_SCREEN_BIT_MESA;
 193 #endif
 194
 195    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_BACK_LEFT))
 196       surface_type |= EGL_PBUFFER_BIT;
 197
 198    conf->Conformant = api_mask;
 199    conf->RenderableType = api_mask;
 200
 201    conf->RedSize = rgba[0];
 202    conf->GreenSize = rgba[1];
 203    conf->BlueSize = rgba[2];
 204    conf->AlphaSize = rgba[3];
 205    conf->BufferSize = buffer_size;
 206
 207    conf->DepthSize = depth_stencil[0];
 208    conf->StencilSize = depth_stencil[1];
 209
 210    conf->SurfaceType = surface_type;
 211
 212    conf->NativeRenderable = EGL_TRUE;
 213    if (surface_type & EGL_WINDOW_BIT) {
 214       conf->NativeVisualID = nconf->native_visual_id;
 215       conf->NativeVisualType = nconf->native_visual_type;
 216    }
 217
 218    if (surface_type & EGL_PBUFFER_BIT) {
 219       conf->BindToTextureRGB = EGL_TRUE;
 220       if (rgba[3])
 221          conf->BindToTextureRGBA = EGL_TRUE;
 222
 223       conf->MaxPbufferWidth = 4096;
 224       conf->MaxPbufferHeight = 4096;
 225       conf->MaxPbufferPixels = 4096 * 4096;
 226    }
 227
 228    conf->Level = nconf->level;
 229    conf->Samples = nconf->samples;
 230    conf->SampleBuffers = 0;
 231
 232    if (nconf->slow_config)
 233       conf->ConfigCaveat = EGL_SLOW_CONFIG;
 234
 235    if (nconf->transparent_rgb) {
 236       conf->TransparentType = EGL_TRANSPARENT_RGB;
 237       conf->TransparentRedValue = nconf->transparent_rgb_values[0];
 238       conf->TransparentGreenValue = nconf->transparent_rgb_values[1];
 239       conf->TransparentBlueValue = nconf->transparent_rgb_values[2];
 240    }
 241
 242    conf->MinSwapInterval = 0;
 243    conf->MaxSwapInterval = max_swap_interval;
 244    if (preserve_buffer)
 245       conf->SurfaceType |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 246
 247    return _eglValidateConfig(conf, EGL_FALSE);
 248 }
 249
 250 /**
 251  * Initialize an EGL config from the native config.
 252  */
 253 static EGLBoolean
 254 egl_g3d_init_config(_EGLDriver *drv, _EGLDisplay *dpy,
 255                     _EGLConfig *conf, const struct native_config *nconf,
 256                     enum pipe_format depth_stencil_format,
 257                     int preserve_buffer, int max_swap_interval)
 258 {
 259    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 260    EGLint buffer_mask, api_mask;
 261    EGLBoolean valid;
 262
 263    /* skip single-buffered configs */
 264    if (!(nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_BACK_LEFT)))
 265       return EGL_FALSE;
 266
 267    buffer_mask = 0x0;
 268    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_FRONT_LEFT))
 269       buffer_mask |= ST_ATTACHMENT_FRONT_LEFT_MASK;
 270    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_BACK_LEFT))
 271       buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
 272    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_FRONT_RIGHT))
 273       buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
 274    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_BACK_RIGHT))
 275       buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
 276
 277    gconf->stvis.buffer_mask = buffer_mask;
 278    gconf->stvis.color_format = nconf->color_format;
 279    gconf->stvis.depth_stencil_format = depth_stencil_format;
 280    gconf->stvis.accum_format = PIPE_FORMAT_NONE;
 281    gconf->stvis.samples = nconf->samples;
 282
 283    gconf->stvis.render_buffer = (buffer_mask & ST_ATTACHMENT_BACK_LEFT_MASK) ?
 284       ST_ATTACHMENT_BACK_LEFT : ST_ATTACHMENT_FRONT_LEFT;
 285
 286    api_mask = dpy->ClientAPIsMask;
 287    /* this is required by EGL, not by OpenGL ES */
 288    if (nconf->window_bit &&
 289        gconf->stvis.render_buffer != ST_ATTACHMENT_BACK_LEFT)
 290       api_mask &= ~(EGL_OPENGL_ES_BIT | EGL_OPENGL_ES2_BIT);
 291
 292    if (!api_mask) {
 293       _eglLog(_EGL_DEBUG, "no state tracker supports config 0x%x",
 294             nconf->native_visual_id);
 295    }
 296
 297    valid = init_config_attributes(&gconf->base,
 298          nconf, api_mask, depth_stencil_format,
 299          preserve_buffer, max_swap_interval);
 300    if (!valid) {
 301       _eglLog(_EGL_DEBUG, "skip invalid config 0x%x", nconf->native_visual_id);
 302       return EGL_FALSE;
 303    }
 304
 305    gconf->native = nconf;
 306
 307    return EGL_TRUE;
 308 }
 309
 310 /**
 311  * Get all interested depth/stencil formats of a display.
 312  */
 313 static EGLint
 314 egl_g3d_fill_depth_stencil_formats(_EGLDisplay *dpy,
 315                                    enum pipe_format formats[8])
 316 {
 317    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 318    struct pipe_screen *screen = gdpy->native->screen;
 319    const EGLint candidates[] = {
 320       1, PIPE_FORMAT_Z16_UNORM,
 321       1, PIPE_FORMAT_Z32_UNORM,
 322       2, PIPE_FORMAT_Z24_UNORM_S8_USCALED, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 323       2, PIPE_FORMAT_Z24X8_UNORM, PIPE_FORMAT_X8Z24_UNORM,
 324       0
 325    };
 326    const EGLint *fmt = candidates;
 327    EGLint count;
 328
 329    count = 0;
 330    formats[count++] = PIPE_FORMAT_NONE;
 331
 332    while (*fmt) {
 333       EGLint i, n = *fmt++;
 334
 335       /* pick the first supported format */
 336       for (i = 0; i < n; i++) {
 337          if (screen->is_format_supported(screen, fmt[i],
 338                   PIPE_TEXTURE_2D, 0, PIPE_BIND_DEPTH_STENCIL, 0)) {
 339             formats[count++] = fmt[i];
 340             break;
 341          }
 342       }
 343
 344       fmt += n;
 345    }
 346
 347    return count;
 348 }
 349
 350 /**
 351  * Add configs to display and return the next config ID.
 352  */
 353 static EGLint
 354 egl_g3d_add_configs(_EGLDriver *drv, _EGLDisplay *dpy, EGLint id)
 355 {
 356    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 357    const struct native_config **native_configs;
 358    enum pipe_format depth_stencil_formats[8];
 359    int num_formats, num_configs, i, j;
 360    int preserve_buffer, max_swap_interval;
 361
 362    native_configs = gdpy->native->get_configs(gdpy->native, &num_configs);
 363    if (!num_configs) {
 364       if (native_configs)
 365          FREE(native_configs);
 366       return id;
 367    }
 368
 369    preserve_buffer =
 370       gdpy->native->get_param(gdpy->native, NATIVE_PARAM_PRESERVE_BUFFER);
 371    max_swap_interval =
 372       gdpy->native->get_param(gdpy->native, NATIVE_PARAM_MAX_SWAP_INTERVAL);
 373
 374    num_formats = egl_g3d_fill_depth_stencil_formats(dpy,
 375          depth_stencil_formats);
 376
 377    for (i = 0; i < num_configs; i++) {
 378       for (j = 0; j < num_formats; j++) {
 379          struct egl_g3d_config *gconf;
 380
 381          gconf = CALLOC_STRUCT(egl_g3d_config);
 382          if (gconf) {
 383             _eglInitConfig(&gconf->base, dpy, id);
 384             if (!egl_g3d_init_config(drv, dpy, &gconf->base,
 385                      native_configs[i], depth_stencil_formats[j],
 386                      preserve_buffer, max_swap_interval)) {
 387                FREE(gconf);
 388                break;
 389             }
 390
 391             _eglLinkConfig(&gconf->base);
 392             id++;
 393          }
 394       }
 395    }
 396
 397    FREE(native_configs);
 398    return id;
 399 }
 400
 401 static void
 402 egl_g3d_invalid_surface(struct native_display *ndpy,
 403                         struct native_surface *nsurf,
 404                         unsigned int seq_num)
 405 {
 406    /* XXX not thread safe? */
 407    struct egl_g3d_surface *gsurf = egl_g3d_surface(nsurf->user_data);
 408    struct egl_g3d_context *gctx;
 409
 410    /*
 411     * Some functions such as egl_g3d_copy_buffers create a temporary native
 412     * surface.  There is no gsurf associated with it.
 413     */
 414    gctx = (gsurf) ? egl_g3d_context(gsurf->base.CurrentContext) : NULL;
 415    if (gctx)
 416       gctx->stctxi->notify_invalid_framebuffer(gctx->stctxi, gsurf->stfbi);
 417 }
 418
 419 static struct pipe_screen *
 420 egl_g3d_new_drm_screen(struct native_display *ndpy, const char *name, int fd)
 421 {
 422    _EGLDisplay *dpy = (_EGLDisplay *) ndpy->user_data;
 423    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 424    return gdpy->loader->create_drm_screen(name, fd);
 425 }
 426
 427 static struct pipe_screen *
 428 egl_g3d_new_sw_screen(struct native_display *ndpy, struct sw_winsys *ws)
 429 {
 430    _EGLDisplay *dpy = (_EGLDisplay *) ndpy->user_data;
 431    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 432    return gdpy->loader->create_sw_screen(ws);
 433 }
 434
 435 static struct native_event_handler egl_g3d_native_event_handler = {
 436    egl_g3d_invalid_surface,
 437    egl_g3d_new_drm_screen,
 438    egl_g3d_new_sw_screen
 439 };
 440
 441 static void
 442 egl_g3d_free_config(void *conf)
 443 {
 444    struct egl_g3d_config *gconf = egl_g3d_config((_EGLConfig *) conf);
 445    FREE(gconf);
 446 }
 447
 448 static void
 449 egl_g3d_free_screen(void *scr)
 450 {
 451 #ifdef EGL_MESA_screen_surface
 452    struct egl_g3d_screen *gscr = egl_g3d_screen((_EGLScreen *) scr);
 453    FREE(gscr->native_modes);
 454    FREE(gscr);
 455 #endif
 456 }
 457
 458 static EGLBoolean
 459 egl_g3d_terminate(_EGLDriver *drv, _EGLDisplay *dpy)
 460 {
 461    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 462
 463    _eglReleaseDisplayResources(drv, dpy);
 464
 465    if (gdpy->pipe)
 466       gdpy->pipe->destroy(gdpy->pipe);
 467
 468    if (dpy->Configs) {
 469       _eglDestroyArray(dpy->Configs, egl_g3d_free_config);
 470       dpy->Configs = NULL;
 471    }
 472    if (dpy->Screens) {
 473       _eglDestroyArray(dpy->Screens, egl_g3d_free_screen);
 474       dpy->Screens = NULL;
 475    }
 476
 477    _eglCleanupDisplay(dpy);
 478
 479    if (gdpy->smapi)
 480       egl_g3d_destroy_st_manager(gdpy->smapi);
 481
 482    if (gdpy->native)
 483       gdpy->native->destroy(gdpy->native);
 484
 485    FREE(gdpy);
 486    dpy->DriverData = NULL;
 487
 488    return EGL_TRUE;
 489 }
 490
 491 static EGLBoolean
 492 egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy,
 493                    EGLint *major, EGLint *minor)
 494 {
 495    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 496    struct egl_g3d_display *gdpy;
 497    const struct native_platform *nplat;
 498
 499    nplat = egl_g3d_get_platform(drv, dpy->Platform);
 500    if (!nplat)
 501       return EGL_FALSE;
 502
 503    gdpy = CALLOC_STRUCT(egl_g3d_display);
 504    if (!gdpy) {
 505       _eglError(EGL_BAD_ALLOC, "eglInitialize");
 506       goto fail;
 507    }
 508    gdpy->loader = gdrv->loader;
 509    dpy->DriverData = gdpy;
 510
 511    _eglLog(_EGL_INFO, "use %s for display %p", nplat->name, dpy->PlatformDisplay);
 512    gdpy->native = nplat->create_display(dpy->PlatformDisplay,
 513          &egl_g3d_native_event_handler, (void *) dpy);
 514    if (!gdpy->native) {
 515       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(no usable display)");
 516       goto fail;
 517    }
 518
 519    if (gdpy->loader->profile_masks[ST_API_OPENGL] & ST_PROFILE_DEFAULT_MASK)
 520       dpy->ClientAPIsMask |= EGL_OPENGL_BIT;
 521    if (gdpy->loader->profile_masks[ST_API_OPENGL] & ST_PROFILE_OPENGL_ES1_MASK)
 522       dpy->ClientAPIsMask |= EGL_OPENGL_ES_BIT;
 523    if (gdpy->loader->profile_masks[ST_API_OPENGL] & ST_PROFILE_OPENGL_ES2_MASK)
 524       dpy->ClientAPIsMask |= EGL_OPENGL_ES2_BIT;
 525    if (gdpy->loader->profile_masks[ST_API_OPENVG] & ST_PROFILE_DEFAULT_MASK)
 526       dpy->ClientAPIsMask |= EGL_OPENVG_BIT;
 527
 528    gdpy->smapi = egl_g3d_create_st_manager(dpy);
 529    if (!gdpy->smapi) {
 530       _eglError(EGL_NOT_INITIALIZED,
 531             "eglInitialize(failed to create st manager)");
 532       goto fail;
 533    }
 534
 535 #ifdef EGL_MESA_screen_surface
 536    /* enable MESA_screen_surface before adding (and validating) configs */
 537    if (gdpy->native->modeset) {
 538       dpy->Extensions.MESA_screen_surface = EGL_TRUE;
 539       egl_g3d_add_screens(drv, dpy);
 540    }
 541 #endif
 542
 543    dpy->Extensions.KHR_image_base = EGL_TRUE;
 544    if (gdpy->native->get_param(gdpy->native, NATIVE_PARAM_USE_NATIVE_BUFFER))
 545       dpy->Extensions.KHR_image_pixmap = EGL_TRUE;
 546
 547    dpy->Extensions.KHR_reusable_sync = EGL_TRUE;
 548    dpy->Extensions.KHR_fence_sync = EGL_TRUE;
 549
 550    dpy->Extensions.KHR_surfaceless_gles1 = EGL_TRUE;
 551    dpy->Extensions.KHR_surfaceless_gles2 = EGL_TRUE;
 552    dpy->Extensions.KHR_surfaceless_opengl = EGL_TRUE;
 553
 554    if (dpy->Platform == _EGL_PLATFORM_DRM) {
 555       dpy->Extensions.MESA_drm_display = EGL_TRUE;
 556       if (gdpy->native->buffer)
 557          dpy->Extensions.MESA_drm_image = EGL_TRUE;
 558    }
 559
 560    if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
 561       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
 562       goto fail;
 563    }
 564
 565    *major = 1;
 566    *minor = 4;
 567
 568    return EGL_TRUE;
 569
 570 fail:
 571    if (gdpy)
 572       egl_g3d_terminate(drv, dpy);
 573    return EGL_FALSE;
 574 }
 575
 576 static _EGLProc
 577 egl_g3d_get_proc_address(_EGLDriver *drv, const char *procname)
 578 {
 579    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 580    struct st_api *stapi = NULL;
 581
 582    if (procname && procname[0] == 'v' && procname[1] == 'g')
 583       stapi = gdrv->loader->get_st_api(ST_API_OPENVG);
 584    else if (procname && procname[0] == 'g' && procname[1] == 'l')
 585       stapi = gdrv->loader->get_st_api(ST_API_OPENGL);
 586
 587    return (_EGLProc) ((stapi) ?
 588          stapi->get_proc_address(stapi, procname) : NULL);
 589 }
 590
 591 static EGLint
 592 egl_g3d_probe(_EGLDriver *drv, _EGLDisplay *dpy)
 593 {
 594    return (egl_g3d_get_platform(drv, dpy->Platform)) ? 90 : 0;
 595 }
 596
 597 _EGLDriver *
 598 egl_g3d_create_driver(const struct egl_g3d_loader *loader)
 599 {
 600    struct egl_g3d_driver *gdrv;
 601
 602    gdrv = CALLOC_STRUCT(egl_g3d_driver);
 603    if (!gdrv)
 604       return NULL;
 605
 606    gdrv->loader = loader;
 607
 608    egl_g3d_init_driver_api(&gdrv->base);
 609    gdrv->base.API.Initialize = egl_g3d_initialize;
 610    gdrv->base.API.Terminate = egl_g3d_terminate;
 611    gdrv->base.API.GetProcAddress = egl_g3d_get_proc_address;
 612
 613    gdrv->base.Probe = egl_g3d_probe;
 614
 615    /* to be filled by the caller */
 616    gdrv->base.Name = NULL;
 617    gdrv->base.Unload = NULL;
 618
 619    return &gdrv->base;
 620 }
 621
 622 void
 623 egl_g3d_destroy_driver(_EGLDriver *drv)
 624 {
 625    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 626    FREE(gdrv);
 627 }