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_KMS_BACKEND
  69          nplat = native_get_kms_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);
 130
 131       for (j = 0; j < num_modes; j++) {
 132          const struct native_mode *nmode = native_modes[j];
 133          _EGLMode *mode;
 134
 135          mode = _eglAddNewMode(&gscr->base, nmode->width, nmode->height,
 136                nmode->refresh_rate, nmode->desc);
 137          if (!mode)
 138             break;
 139          /* gscr->native_modes and gscr->base.Modes should be consistent */
 140          assert(mode == &gscr->base.Modes[j]);
 141       }
 142
 143       gscr->native = nconn;
 144       gscr->native_modes = native_modes;
 145
 146       _eglAddScreen(dpy, &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 {
 161    uint rgba[4], depth_stencil[2], buffer_size;
 162    EGLint surface_type;
 163    EGLint i;
 164
 165    /* get the color and depth/stencil component sizes */
 166    assert(nconf->color_format != PIPE_FORMAT_NONE);
 167    buffer_size = 0;
 168    for (i = 0; i < 4; i++) {
 169       rgba[i] = util_format_get_component_bits(nconf->color_format,
 170             UTIL_FORMAT_COLORSPACE_RGB, i);
 171       buffer_size += rgba[i];
 172    }
 173    for (i = 0; i < 2; i++) {
 174       if (depth_stencil_format != PIPE_FORMAT_NONE) {
 175          depth_stencil[i] =
 176             util_format_get_component_bits(depth_stencil_format,
 177                UTIL_FORMAT_COLORSPACE_ZS, i);
 178       }
 179       else {
 180          depth_stencil[i] = 0;
 181       }
 182    }
 183
 184    surface_type = 0x0;
 185    if (nconf->window_bit)
 186       surface_type |= EGL_WINDOW_BIT;
 187    if (nconf->pixmap_bit)
 188       surface_type |= EGL_PIXMAP_BIT;
 189 #ifdef EGL_MESA_screen_surface
 190    if (nconf->scanout_bit)
 191       surface_type |= EGL_SCREEN_BIT_MESA;
 192 #endif
 193
 194    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_BACK_LEFT))
 195       surface_type |= EGL_PBUFFER_BIT;
 196
 197    SET_CONFIG_ATTRIB(conf, EGL_CONFORMANT, api_mask);
 198    SET_CONFIG_ATTRIB(conf, EGL_RENDERABLE_TYPE, api_mask);
 199
 200    SET_CONFIG_ATTRIB(conf, EGL_RED_SIZE, rgba[0]);
 201    SET_CONFIG_ATTRIB(conf, EGL_GREEN_SIZE, rgba[1]);
 202    SET_CONFIG_ATTRIB(conf, EGL_BLUE_SIZE, rgba[2]);
 203    SET_CONFIG_ATTRIB(conf, EGL_ALPHA_SIZE, rgba[3]);
 204    SET_CONFIG_ATTRIB(conf, EGL_BUFFER_SIZE, buffer_size);
 205
 206    SET_CONFIG_ATTRIB(conf, EGL_DEPTH_SIZE, depth_stencil[0]);
 207    SET_CONFIG_ATTRIB(conf, EGL_STENCIL_SIZE, depth_stencil[1]);
 208
 209    SET_CONFIG_ATTRIB(conf, EGL_SURFACE_TYPE, surface_type);
 210
 211    SET_CONFIG_ATTRIB(conf, EGL_NATIVE_RENDERABLE, EGL_TRUE);
 212    if (surface_type & EGL_WINDOW_BIT) {
 213       SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_ID, nconf->native_visual_id);
 214       SET_CONFIG_ATTRIB(conf, EGL_NATIVE_VISUAL_TYPE,
 215             nconf->native_visual_type);
 216    }
 217
 218    if (surface_type & EGL_PBUFFER_BIT) {
 219       SET_CONFIG_ATTRIB(conf, EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE);
 220       if (rgba[3])
 221          SET_CONFIG_ATTRIB(conf, EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE);
 222
 223       SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_WIDTH, 4096);
 224       SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_HEIGHT, 4096);
 225       SET_CONFIG_ATTRIB(conf, EGL_MAX_PBUFFER_PIXELS, 4096 * 4096);
 226    }
 227
 228    SET_CONFIG_ATTRIB(conf, EGL_LEVEL, nconf->level);
 229    SET_CONFIG_ATTRIB(conf, EGL_SAMPLES, nconf->samples);
 230    SET_CONFIG_ATTRIB(conf, EGL_SAMPLE_BUFFERS, 1);
 231
 232    if (nconf->slow_config)
 233       SET_CONFIG_ATTRIB(conf, EGL_CONFIG_CAVEAT, EGL_SLOW_CONFIG);
 234
 235    if (nconf->transparent_rgb) {
 236       rgba[0] = nconf->transparent_rgb_values[0];
 237       rgba[1] = nconf->transparent_rgb_values[1];
 238       rgba[2] = nconf->transparent_rgb_values[2];
 239
 240       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_TYPE, EGL_TRANSPARENT_RGB);
 241       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_RED_VALUE, rgba[0]);
 242       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_GREEN_VALUE, rgba[1]);
 243       SET_CONFIG_ATTRIB(conf, EGL_TRANSPARENT_BLUE_VALUE, rgba[2]);
 244    }
 245
 246    return _eglValidateConfig(conf, EGL_FALSE);
 247 }
 248
 249 /**
 250  * Initialize an EGL config from the native config.
 251  */
 252 static EGLBoolean
 253 egl_g3d_init_config(_EGLDriver *drv, _EGLDisplay *dpy,
 254                     _EGLConfig *conf, const struct native_config *nconf,
 255                     enum pipe_format depth_stencil_format)
 256 {
 257    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 258    EGLint buffer_mask, api_mask;
 259    EGLBoolean valid;
 260
 261    buffer_mask = 0x0;
 262    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_FRONT_LEFT))
 263       buffer_mask |= ST_ATTACHMENT_FRONT_LEFT_MASK;
 264    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_BACK_LEFT))
 265       buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
 266    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_FRONT_RIGHT))
 267       buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
 268    if (nconf->buffer_mask & (1 << NATIVE_ATTACHMENT_BACK_RIGHT))
 269       buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
 270
 271    gconf->stvis.buffer_mask = buffer_mask;
 272    gconf->stvis.color_format = nconf->color_format;
 273    gconf->stvis.depth_stencil_format = depth_stencil_format;
 274    gconf->stvis.accum_format = PIPE_FORMAT_NONE;
 275    gconf->stvis.samples = nconf->samples;
 276
 277    gconf->stvis.render_buffer = (buffer_mask & ST_ATTACHMENT_BACK_LEFT_MASK) ?
 278       ST_ATTACHMENT_BACK_LEFT : ST_ATTACHMENT_FRONT_LEFT;
 279
 280    api_mask = dpy->ClientAPIsMask;
 281    /* this is required by EGL, not by OpenGL ES */
 282    if (nconf->window_bit &&
 283        gconf->stvis.render_buffer != ST_ATTACHMENT_BACK_LEFT)
 284       api_mask &= ~(EGL_OPENGL_ES_BIT | EGL_OPENGL_ES2_BIT);
 285
 286    if (!api_mask) {
 287       _eglLog(_EGL_DEBUG, "no state tracker supports config 0x%x",
 288             nconf->native_visual_id);
 289    }
 290
 291    valid = init_config_attributes(&gconf->base,
 292          nconf, api_mask, depth_stencil_format);
 293    if (!valid) {
 294       _eglLog(_EGL_DEBUG, "skip invalid config 0x%x", nconf->native_visual_id);
 295       return EGL_FALSE;
 296    }
 297
 298    gconf->native = nconf;
 299
 300    return EGL_TRUE;
 301 }
 302
 303 /**
 304  * Get all interested depth/stencil formats of a display.
 305  */
 306 static EGLint
 307 egl_g3d_fill_depth_stencil_formats(_EGLDisplay *dpy,
 308                                    enum pipe_format formats[8])
 309 {
 310    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 311    struct pipe_screen *screen = gdpy->native->screen;
 312    const EGLint candidates[] = {
 313       1, PIPE_FORMAT_Z16_UNORM,
 314       1, PIPE_FORMAT_Z32_UNORM,
 315       2, PIPE_FORMAT_Z24_UNORM_S8_USCALED, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 316       2, PIPE_FORMAT_Z24X8_UNORM, PIPE_FORMAT_X8Z24_UNORM,
 317       0
 318    };
 319    const EGLint *fmt = candidates;
 320    EGLint count;
 321
 322    count = 0;
 323    formats[count++] = PIPE_FORMAT_NONE;
 324
 325    while (*fmt) {
 326       EGLint i, n = *fmt++;
 327
 328       /* pick the first supported format */
 329       for (i = 0; i < n; i++) {
 330          if (screen->is_format_supported(screen, fmt[i],
 331                   PIPE_TEXTURE_2D, 0, PIPE_BIND_DEPTH_STENCIL, 0)) {
 332             formats[count++] = fmt[i];
 333             break;
 334          }
 335       }
 336
 337       fmt += n;
 338    }
 339
 340    return count;
 341 }
 342
 343 /**
 344  * Add configs to display and return the next config ID.
 345  */
 346 static EGLint
 347 egl_g3d_add_configs(_EGLDriver *drv, _EGLDisplay *dpy, EGLint id)
 348 {
 349    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 350    const struct native_config **native_configs;
 351    enum pipe_format depth_stencil_formats[8];
 352    int num_formats, num_configs, i, j;
 353
 354    native_configs = gdpy->native->get_configs(gdpy->native, &num_configs);
 355    if (!num_configs) {
 356       if (native_configs)
 357          FREE(native_configs);
 358       return id;
 359    }
 360
 361    num_formats = egl_g3d_fill_depth_stencil_formats(dpy,
 362          depth_stencil_formats);
 363
 364    for (i = 0; i < num_configs; i++) {
 365       for (j = 0; j < num_formats; j++) {
 366          struct egl_g3d_config *gconf;
 367
 368          gconf = CALLOC_STRUCT(egl_g3d_config);
 369          if (gconf) {
 370             _eglInitConfig(&gconf->base, dpy, id);
 371             if (!egl_g3d_init_config(drv, dpy, &gconf->base,
 372                      native_configs[i], depth_stencil_formats[j])) {
 373                FREE(gconf);
 374                break;
 375             }
 376
 377             _eglAddConfig(dpy, &gconf->base);
 378             id++;
 379          }
 380       }
 381    }
 382
 383    FREE(native_configs);
 384    return id;
 385 }
 386
 387 static void
 388 egl_g3d_invalid_surface(struct native_display *ndpy,
 389                         struct native_surface *nsurf,
 390                         unsigned int seq_num)
 391 {
 392    /* XXX not thread safe? */
 393    struct egl_g3d_surface *gsurf = egl_g3d_surface(nsurf->user_data);
 394    struct egl_g3d_context *gctx;
 395
 396    /*
 397     * Some functions such as egl_g3d_copy_buffers create a temporary native
 398     * surface.  There is no gsurf associated with it.
 399     */
 400    gctx = (gsurf) ? egl_g3d_context(gsurf->base.CurrentContext) : NULL;
 401    if (gctx)
 402       gctx->stctxi->notify_invalid_framebuffer(gctx->stctxi, gsurf->stfbi);
 403 }
 404
 405 static struct pipe_screen *
 406 egl_g3d_new_drm_screen(struct native_display *ndpy, const char *name, int fd)
 407 {
 408    _EGLDisplay *dpy = (_EGLDisplay *) ndpy->user_data;
 409    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 410    return gdpy->loader->create_drm_screen(name, fd);
 411 }
 412
 413 static struct pipe_screen *
 414 egl_g3d_new_sw_screen(struct native_display *ndpy, struct sw_winsys *ws)
 415 {
 416    _EGLDisplay *dpy = (_EGLDisplay *) ndpy->user_data;
 417    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 418    return gdpy->loader->create_sw_screen(ws);
 419 }
 420
 421 static struct native_event_handler egl_g3d_native_event_handler = {
 422    egl_g3d_invalid_surface,
 423    egl_g3d_new_drm_screen,
 424    egl_g3d_new_sw_screen
 425 };
 426
 427 static void
 428 egl_g3d_free_config(void *conf)
 429 {
 430    struct egl_g3d_config *gconf = egl_g3d_config((_EGLConfig *) conf);
 431    FREE(gconf);
 432 }
 433
 434 static void
 435 egl_g3d_free_screen(void *scr)
 436 {
 437 #ifdef EGL_MESA_screen_surface
 438    struct egl_g3d_screen *gscr = egl_g3d_screen((_EGLScreen *) scr);
 439    FREE(gscr->native_modes);
 440    FREE(gscr);
 441 #endif
 442 }
 443
 444 static EGLBoolean
 445 egl_g3d_terminate(_EGLDriver *drv, _EGLDisplay *dpy)
 446 {
 447    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 448
 449    _eglReleaseDisplayResources(drv, dpy);
 450
 451    if (gdpy->pipe)
 452       gdpy->pipe->destroy(gdpy->pipe);
 453
 454    if (dpy->Configs) {
 455       _eglDestroyArray(dpy->Configs, egl_g3d_free_config);
 456       dpy->Configs = NULL;
 457    }
 458    if (dpy->Screens) {
 459       _eglDestroyArray(dpy->Screens, egl_g3d_free_screen);
 460       dpy->Screens = NULL;
 461    }
 462
 463    _eglCleanupDisplay(dpy);
 464
 465    if (gdpy->smapi)
 466       egl_g3d_destroy_st_manager(gdpy->smapi);
 467
 468    if (gdpy->native)
 469       gdpy->native->destroy(gdpy->native);
 470
 471    FREE(gdpy);
 472    dpy->DriverData = NULL;
 473
 474    return EGL_TRUE;
 475 }
 476
 477 static EGLBoolean
 478 egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy,
 479                    EGLint *major, EGLint *minor)
 480 {
 481    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 482    struct egl_g3d_display *gdpy;
 483    const struct native_platform *nplat;
 484
 485    nplat = egl_g3d_get_platform(drv, dpy->Platform);
 486    if (!nplat)
 487       return EGL_FALSE;
 488
 489    gdpy = CALLOC_STRUCT(egl_g3d_display);
 490    if (!gdpy) {
 491       _eglError(EGL_BAD_ALLOC, "eglInitialize");
 492       goto fail;
 493    }
 494    gdpy->loader = gdrv->loader;
 495    dpy->DriverData = gdpy;
 496
 497    _eglLog(_EGL_INFO, "use %s for display %p", nplat->name, dpy->PlatformDisplay);
 498    gdpy->native = nplat->create_display(dpy->PlatformDisplay,
 499          &egl_g3d_native_event_handler, (void *) dpy);
 500    if (!gdpy->native) {
 501       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(no usable display)");
 502       goto fail;
 503    }
 504
 505    if (gdpy->loader->api_mask & (1 << ST_API_OPENGL))
 506       dpy->ClientAPIsMask |= EGL_OPENGL_BIT;
 507    if (gdpy->loader->api_mask & (1 << ST_API_OPENGL_ES1))
 508       dpy->ClientAPIsMask |= EGL_OPENGL_ES_BIT;
 509    if (gdpy->loader->api_mask & (1 << ST_API_OPENGL_ES2))
 510       dpy->ClientAPIsMask |= EGL_OPENGL_ES2_BIT;
 511    if (gdpy->loader->api_mask & (1 << ST_API_OPENVG))
 512       dpy->ClientAPIsMask |= EGL_OPENVG_BIT;
 513
 514    gdpy->smapi = egl_g3d_create_st_manager(dpy);
 515    if (!gdpy->smapi) {
 516       _eglError(EGL_NOT_INITIALIZED,
 517             "eglInitialize(failed to create st manager)");
 518       goto fail;
 519    }
 520
 521 #ifdef EGL_MESA_screen_surface
 522    /* enable MESA_screen_surface before adding (and validating) configs */
 523    if (gdpy->native->modeset) {
 524       dpy->Extensions.MESA_screen_surface = EGL_TRUE;
 525       egl_g3d_add_screens(drv, dpy);
 526    }
 527 #endif
 528
 529    dpy->Extensions.KHR_image_base = EGL_TRUE;
 530    if (gdpy->native->get_param(gdpy->native, NATIVE_PARAM_USE_NATIVE_BUFFER))
 531       dpy->Extensions.KHR_image_pixmap = EGL_TRUE;
 532
 533    dpy->Extensions.KHR_reusable_sync = EGL_TRUE;
 534    dpy->Extensions.KHR_fence_sync = EGL_TRUE;
 535
 536    dpy->Extensions.KHR_surfaceless_gles1 = EGL_TRUE;
 537    dpy->Extensions.KHR_surfaceless_gles2 = EGL_TRUE;
 538    dpy->Extensions.KHR_surfaceless_opengl = EGL_TRUE;
 539
 540    if (dpy->Platform == _EGL_PLATFORM_DRM)
 541       dpy->Extensions.MESA_drm_image = EGL_TRUE;
 542
 543    if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
 544       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
 545       goto fail;
 546    }
 547
 548    *major = 1;
 549    *minor = 4;
 550
 551    return EGL_TRUE;
 552
 553 fail:
 554    if (gdpy)
 555       egl_g3d_terminate(drv, dpy);
 556    return EGL_FALSE;
 557 }
 558
 559 static _EGLProc
 560 egl_g3d_get_proc_address(_EGLDriver *drv, const char *procname)
 561 {
 562    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 563    struct st_api *stapi = NULL;
 564
 565    if (procname && procname[0] == 'v' && procname[1] == 'g')
 566       stapi = gdrv->loader->get_st_api(ST_API_OPENVG);
 567    else if (procname && procname[0] == 'g' && procname[1] == 'l')
 568       stapi = gdrv->loader->guess_gl_api();
 569
 570    return (_EGLProc) ((stapi) ?
 571          stapi->get_proc_address(stapi, procname) : NULL);
 572 }
 573
 574 static EGLint
 575 egl_g3d_probe(_EGLDriver *drv, _EGLDisplay *dpy)
 576 {
 577    return (egl_g3d_get_platform(drv, dpy->Platform)) ? 90 : 0;
 578 }
 579
 580 _EGLDriver *
 581 egl_g3d_create_driver(const struct egl_g3d_loader *loader)
 582 {
 583    struct egl_g3d_driver *gdrv;
 584
 585    gdrv = CALLOC_STRUCT(egl_g3d_driver);
 586    if (!gdrv)
 587       return NULL;
 588
 589    gdrv->loader = loader;
 590
 591    egl_g3d_init_driver_api(&gdrv->base);
 592    gdrv->base.API.Initialize = egl_g3d_initialize;
 593    gdrv->base.API.Terminate = egl_g3d_terminate;
 594    gdrv->base.API.GetProcAddress = egl_g3d_get_proc_address;
 595
 596    gdrv->base.Probe = egl_g3d_probe;
 597
 598    /* to be filled by the caller */
 599    gdrv->base.Name = NULL;
 600    gdrv->base.Unload = NULL;
 601
 602    return &gdrv->base;
 603 }
 604
 605 void
 606 egl_g3d_destroy_driver(_EGLDriver *drv)
 607 {
 608    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 609    FREE(gdrv);
 610 }