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
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include <assert.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include "pipe/p_screen.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_rect.h"
  31 #include "util/u_inlines.h"
  32 #include "egldriver.h"
  33 #include "eglcurrent.h"
  34 #include "eglconfigutil.h"
  35 #include "egllog.h"
  36
  37 #include "native.h"
  38 #include "egl_g3d.h"
  39 #include "egl_st.h"
  40
  41 /**
  42  * Validate the draw/read surfaces of the context.
  43  */
  44 static void
  45 egl_g3d_validate_context(_EGLDisplay *dpy, _EGLContext *ctx)
  46 {
  47    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
  48    struct pipe_screen *screen = gdpy->native->screen;
  49    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
  50    const uint st_att_map[NUM_NATIVE_ATTACHMENTS] = {
  51       ST_SURFACE_FRONT_LEFT,
  52       ST_SURFACE_BACK_LEFT,
  53       ST_SURFACE_FRONT_RIGHT,
  54       ST_SURFACE_BACK_RIGHT,
  55    };
  56    EGLint num_surfaces, s;
  57
  58    /* validate draw and/or read buffers */
  59    num_surfaces = (gctx->base.ReadSurface == gctx->base.DrawSurface) ? 1 : 2;
  60    for (s = 0; s < num_surfaces; s++) {
  61       struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
  62       struct egl_g3d_surface *gsurf;
  63       struct egl_g3d_buffer *gbuf;
  64       EGLint att;
  65
  66       if (s == 0) {
  67          gsurf = egl_g3d_surface(gctx->base.DrawSurface);
  68          gbuf = &gctx->draw;
  69       }
  70       else {
  71          gsurf = egl_g3d_surface(gctx->base.ReadSurface);
  72          gbuf = &gctx->read;
  73       }
  74
  75       if (!gctx->force_validate) {
  76          unsigned int seq_num;
  77
  78          gsurf->native->validate(gsurf->native, gbuf->attachment_mask,
  79                &seq_num, NULL, NULL, NULL);
  80          /* skip validation */
  81          if (gsurf->sequence_number == seq_num)
  82             continue;
  83       }
  84
  85       pipe_surface_reference(&gsurf->render_surface, NULL);
  86       memset(textures, 0, sizeof(textures));
  87
  88       gsurf->native->validate(gsurf->native, gbuf->attachment_mask,
  89             &gsurf->sequence_number, textures,
  90             &gsurf->base.Width, &gsurf->base.Height);
  91       for (att = 0; att < NUM_NATIVE_ATTACHMENTS; att++) {
  92          struct pipe_texture *pt = textures[att];
  93          struct pipe_surface *ps;
  94
  95          if (native_attachment_mask_test(gbuf->attachment_mask, att) && pt) {
  96             ps = screen->get_tex_surface(screen, pt, 0, 0, 0,
  97                   PIPE_BUFFER_USAGE_GPU_READ |
  98                   PIPE_BUFFER_USAGE_GPU_WRITE);
  99             gctx->stapi->st_set_framebuffer_surface(gbuf->st_fb,
 100                   st_att_map[att], ps);
 101
 102             if (gsurf->render_att == att)
 103                pipe_surface_reference(&gsurf->render_surface, ps);
 104
 105             pipe_surface_reference(&ps, NULL);
 106             pipe_texture_reference(&pt, NULL);
 107          }
 108       }
 109
 110       gctx->stapi->st_resize_framebuffer(gbuf->st_fb,
 111             gsurf->base.Width, gsurf->base.Height);
 112    }
 113
 114    gctx->force_validate = EGL_FALSE;
 115
 116 }
 117
 118 /**
 119  * Create a st_framebuffer.
 120  */
 121 static struct st_framebuffer *
 122 create_framebuffer(_EGLContext *ctx, _EGLSurface *surf)
 123 {
 124    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 125    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 126    struct egl_g3d_config *gconf = egl_g3d_config(gsurf->base.Config);
 127
 128    return gctx->stapi->st_create_framebuffer(&gconf->native->mode,
 129          gconf->native->color_format, gconf->native->depth_format,
 130          gconf->native->stencil_format,
 131          gsurf->base.Width, gsurf->base.Height, &gsurf->base);
 132 }
 133
 134 /**
 135  * Update the attachments of draw/read surfaces.
 136  */
 137 static void
 138 egl_g3d_route_context(_EGLDisplay *dpy, _EGLContext *ctx)
 139 {
 140    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 141    EGLint s;
 142
 143    /* route draw and read buffers' attachments */
 144    for (s = 0; s < 2; s++) {
 145       struct egl_g3d_surface *gsurf;
 146       struct egl_g3d_buffer *gbuf;
 147
 148       if (s == 0) {
 149          gsurf = egl_g3d_surface(gctx->base.DrawSurface);
 150          gbuf = &gctx->draw;
 151       }
 152       else {
 153          gsurf = egl_g3d_surface(gctx->base.ReadSurface);
 154          gbuf = &gctx->read;
 155       }
 156
 157       gbuf->attachment_mask = (1 << gsurf->render_att);
 158
 159       /* FIXME OpenGL defaults to draw the front or back buffer when the
 160        * context is single-buffered or double-buffered respectively.  In EGL,
 161        * however, the buffer to be drawn is determined by the surface, instead
 162        * of the context.  As a result, rendering to a pixmap surface with a
 163        * double-buffered context does not work as expected.
 164        *
 165        * gctx->stapi->st_draw_front_buffer(gctx->st_ctx, natt ==
 166        *    NATIVE_ATTACHMENT_FRONT_LEFT);
 167        */
 168
 169       /*
 170        * FIXME If the back buffer is asked for here, and the front buffer is
 171        * later needed by the client API (e.g. glDrawBuffer is called to draw
 172        * the front buffer), it will create a new pipe texture and draw there.
 173        * One fix is to ask for both buffers here, but it would be a waste if
 174        * the front buffer is never used.  A better fix is to add a callback to
 175        * the pipe screen with context private (just like flush_frontbuffer).
 176        */
 177    }
 178 }
 179
 180 /**
 181  * Reallocate the context's framebuffers after draw/read surfaces change.
 182  */
 183 static EGLBoolean
 184 egl_g3d_realloc_context(_EGLDisplay *dpy, _EGLContext *ctx)
 185 {
 186    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 187    struct egl_g3d_surface *gdraw = egl_g3d_surface(gctx->base.DrawSurface);
 188    struct egl_g3d_surface *gread = egl_g3d_surface(gctx->base.ReadSurface);
 189
 190    /* unreference the old framebuffers */
 191    if (gctx->draw.st_fb) {
 192       EGLBoolean is_equal = (gctx->draw.st_fb == gctx->read.st_fb);
 193       void *priv;
 194
 195       priv = gctx->stapi->st_framebuffer_private(gctx->draw.st_fb);
 196       if (!gdraw || priv != (void *) &gdraw->base) {
 197          gctx->stapi->st_unreference_framebuffer(gctx->draw.st_fb);
 198          gctx->draw.st_fb = NULL;
 199          gctx->draw.attachment_mask = 0x0;
 200       }
 201
 202       if (is_equal) {
 203          gctx->read.st_fb = NULL;
 204          gctx->draw.attachment_mask = 0x0;
 205       }
 206       else {
 207          priv = gctx->stapi->st_framebuffer_private(gctx->read.st_fb);
 208          if (!gread || priv != (void *) &gread->base) {
 209             gctx->stapi->st_unreference_framebuffer(gctx->read.st_fb);
 210             gctx->read.st_fb = NULL;
 211             gctx->draw.attachment_mask = 0x0;
 212          }
 213       }
 214    }
 215
 216    if (!gdraw)
 217       return EGL_TRUE;
 218
 219    /* create the draw fb */
 220    if (!gctx->draw.st_fb) {
 221       gctx->draw.st_fb = create_framebuffer(&gctx->base, &gdraw->base);
 222       if (!gctx->draw.st_fb)
 223          return EGL_FALSE;
 224    }
 225
 226    /* create the read fb */
 227    if (!gctx->read.st_fb) {
 228       if (gread != gdraw) {
 229          gctx->read.st_fb = create_framebuffer(&gctx->base, &gread->base);
 230          if (!gctx->read.st_fb) {
 231             gctx->stapi->st_unreference_framebuffer(gctx->draw.st_fb);
 232             gctx->draw.st_fb = NULL;
 233             return EGL_FALSE;
 234          }
 235       }
 236       else {
 237          /* there is no st_reference_framebuffer... */
 238          gctx->read.st_fb = gctx->draw.st_fb;
 239       }
 240    }
 241
 242    egl_g3d_route_context(dpy, &gctx->base);
 243    gctx->force_validate = EGL_TRUE;
 244
 245    return EGL_TRUE;
 246 }
 247
 248 /**
 249  * Return the state tracker for the given context.
 250  */
 251 static const struct egl_g3d_st *
 252 egl_g3d_choose_st(_EGLDriver *drv, _EGLContext *ctx)
 253 {
 254    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 255    const struct egl_g3d_st *stapi;
 256    EGLint idx = -1;
 257
 258    switch (ctx->ClientAPI) {
 259    case EGL_OPENGL_ES_API:
 260       switch (ctx->ClientVersion) {
 261       case 1:
 262          idx = EGL_G3D_ST_OPENGL_ES;
 263          break;
 264       case 2:
 265          idx = EGL_G3D_ST_OPENGL_ES2;
 266          break;
 267       default:
 268          _eglLog(_EGL_WARNING, "unknown client version %d",
 269                ctx->ClientVersion);
 270          break;
 271       }
 272       break;
 273    case EGL_OPENVG_API:
 274       idx = EGL_G3D_ST_OPENVG;
 275       break;
 276    case EGL_OPENGL_API:
 277       idx = EGL_G3D_ST_OPENGL;
 278       break;
 279    default:
 280       _eglLog(_EGL_WARNING, "unknown client API 0x%04x", ctx->ClientAPI);
 281       break;
 282    }
 283
 284    stapi = (idx >= 0) ? gdrv->stapis[idx] : NULL;
 285    return stapi;
 286 }
 287
 288 /**
 289  * Initialize the state trackers.
 290  */
 291 static void
 292 egl_g3d_init_st(_EGLDriver *drv)
 293 {
 294    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 295    EGLint i;
 296
 297    /* already initialized */
 298    if (gdrv->api_mask)
 299       return;
 300
 301    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
 302       gdrv->stapis[i] = egl_g3d_get_st(i);
 303       if (gdrv->stapis[i])
 304          gdrv->api_mask |= gdrv->stapis[i]->api_bit;
 305    }
 306
 307    if (gdrv->api_mask)
 308       _eglLog(_EGL_DEBUG, "Driver API mask: 0x%x", gdrv->api_mask);
 309    else
 310       _eglLog(_EGL_WARNING, "No supported client API");
 311 }
 312
 313 /**
 314  * Get the probe object of the display.
 315  *
 316  * Note that this function may be called before the display is initialized.
 317  */
 318 static struct native_probe *
 319 egl_g3d_get_probe(_EGLDriver *drv, _EGLDisplay *dpy)
 320 {
 321    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 322    struct native_probe *nprobe;
 323
 324    nprobe = (struct native_probe *) _eglGetProbeCache(gdrv->probe_key);
 325    if (!nprobe || nprobe->display != dpy->NativeDisplay) {
 326       if (nprobe)
 327          nprobe->destroy(nprobe);
 328       nprobe = native_create_probe(dpy->NativeDisplay);
 329       _eglSetProbeCache(gdrv->probe_key, (void *) nprobe);
 330    }
 331
 332    return nprobe;
 333 }
 334
 335 /**
 336  * Destroy the probe object of the display.  The display may be NULL.
 337  *
 338  * Note that this function may be called before the display is initialized.
 339  */
 340 static void
 341 egl_g3d_destroy_probe(_EGLDriver *drv, _EGLDisplay *dpy)
 342 {
 343    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 344    struct native_probe *nprobe;
 345
 346    nprobe = (struct native_probe *) _eglGetProbeCache(gdrv->probe_key);
 347    if (nprobe && (!dpy || nprobe->display == dpy->NativeDisplay)) {
 348       nprobe->destroy(nprobe);
 349       _eglSetProbeCache(gdrv->probe_key, NULL);
 350    }
 351 }
 352
 353 /**
 354  * Return an API mask that consists of the state trackers that supports the
 355  * given mode.
 356  *
 357  * FIXME add st_is_mode_supported()?
 358  */
 359 static EGLint
 360 get_mode_api_mask(const __GLcontextModes *mode, EGLint api_mask)
 361 {
 362    EGLint check;
 363
 364    /* OpenGL ES 1.x and 2.x are checked together */
 365    check = EGL_OPENGL_ES_BIT | EGL_OPENGL_ES2_BIT;
 366    if (api_mask & check) {
 367       /* this is required by EGL, not by OpenGL ES */
 368       if (mode->drawableType & GLX_WINDOW_BIT && !mode->doubleBufferMode)
 369          api_mask &= ~check;
 370    }
 371
 372    check = EGL_OPENVG_BIT;
 373    if (api_mask & check) {
 374       /* vega st needs the depth/stencil rb */
 375       if (!mode->depthBits && !mode->stencilBits)
 376          api_mask &= ~check;
 377    }
 378
 379    return api_mask;
 380 }
 381
 382 #ifdef EGL_MESA_screen_surface
 383
 384 static void
 385 egl_g3d_add_screens(_EGLDriver *drv, _EGLDisplay *dpy)
 386 {
 387    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 388    const struct native_connector **native_connectors;
 389    EGLint num_connectors, i;
 390
 391    native_connectors =
 392       gdpy->native->modeset->get_connectors(gdpy->native, &num_connectors, NULL);
 393    if (!num_connectors) {
 394       if (native_connectors)
 395          free(native_connectors);
 396       return;
 397    }
 398
 399    for (i = 0; i < num_connectors; i++) {
 400       const struct native_connector *nconn = native_connectors[i];
 401       struct egl_g3d_screen *gscr;
 402       const struct native_mode **native_modes;
 403       EGLint num_modes, j;
 404
 405       /* TODO support for hotplug */
 406       native_modes =
 407          gdpy->native->modeset->get_modes(gdpy->native, nconn, &num_modes);
 408       if (!num_modes) {
 409          if (native_modes)
 410             free(native_modes);
 411          continue;
 412       }
 413
 414       gscr = CALLOC_STRUCT(egl_g3d_screen);
 415       if (!gscr) {
 416          free(native_modes);
 417          continue;
 418       }
 419
 420       _eglInitScreen(&gscr->base);
 421
 422       for (j = 0; j < num_modes; j++) {
 423          const struct native_mode *nmode = native_modes[j];
 424          _EGLMode *mode;
 425
 426          mode = _eglAddNewMode(&gscr->base, nmode->width, nmode->height,
 427                nmode->refresh_rate, nmode->desc);
 428          if (!mode)
 429             break;
 430          /* gscr->native_modes and gscr->base.Modes should be consistent */
 431          assert(mode == &gscr->base.Modes[j]);
 432       }
 433
 434       gscr->native = nconn;
 435       gscr->native_modes = native_modes;
 436
 437       _eglAddScreen(dpy, &gscr->base);
 438    }
 439
 440    free(native_connectors);
 441 }
 442
 443 #endif /* EGL_MESA_screen_surface */
 444
 445 /**
 446  * Add configs to display and return the next config ID.
 447  */
 448 static EGLint
 449 egl_g3d_add_configs(_EGLDriver *drv, _EGLDisplay *dpy, EGLint id)
 450 {
 451    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 452    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 453    const struct native_config **native_configs;
 454    int num_configs, i;
 455
 456    native_configs = gdpy->native->get_configs(gdpy->native,
 457          &num_configs);
 458    if (!num_configs) {
 459       if (native_configs)
 460          free(native_configs);
 461       return id;
 462    }
 463
 464    for (i = 0; i < num_configs; i++) {
 465       EGLint api_mask;
 466       struct egl_g3d_config *gconf;
 467       EGLBoolean valid;
 468
 469       gconf = CALLOC_STRUCT(egl_g3d_config);
 470       if (!gconf)
 471          continue;
 472
 473       _eglInitConfig(&gconf->base, dpy, id);
 474
 475       api_mask = get_mode_api_mask(&native_configs[i]->mode, gdrv->api_mask);
 476       if (!api_mask) {
 477          _eglLog(_EGL_DEBUG, "no state tracker supports config 0x%x",
 478                native_configs[i]->mode.visualID);
 479       }
 480
 481       valid = _eglConfigFromContextModesRec(&gconf->base,
 482             &native_configs[i]->mode, api_mask, api_mask);
 483       if (valid) {
 484 #ifdef EGL_MESA_screen_surface
 485          /* check if scanout surface bit is set */
 486          if (native_configs[i]->scanout_bit) {
 487             EGLint val = GET_CONFIG_ATTRIB(&gconf->base, EGL_SURFACE_TYPE);
 488             val |= EGL_SCREEN_BIT_MESA;
 489             SET_CONFIG_ATTRIB(&gconf->base, EGL_SURFACE_TYPE, val);
 490          }
 491 #endif
 492          valid = _eglValidateConfig(&gconf->base, EGL_FALSE);
 493       }
 494       if (!valid) {
 495          _eglLog(_EGL_DEBUG, "skip invalid config 0x%x",
 496                native_configs[i]->mode.visualID);
 497          free(gconf);
 498          continue;
 499       }
 500
 501       gconf->native = native_configs[i];
 502       _eglAddConfig(dpy, &gconf->base);
 503       id++;
 504    }
 505
 506    free(native_configs);
 507    return id;
 508 }
 509
 510 /**
 511  * Flush the front buffer of the context's draw surface.
 512  */
 513 static void
 514 egl_g3d_flush_frontbuffer(struct pipe_screen *screen,
 515                           struct pipe_surface *surf, void *context_private)
 516 {
 517    struct egl_g3d_context *gctx = egl_g3d_context(context_private);
 518    struct egl_g3d_surface *gsurf = egl_g3d_surface(gctx->base.DrawSurface);
 519
 520    if (gsurf)
 521       gsurf->native->flush_frontbuffer(gsurf->native);
 522 }
 523
 524 /**
 525  * Re-validate the context.
 526  */
 527 static void
 528 egl_g3d_update_buffer(struct pipe_screen *screen, void *context_private)
 529 {
 530    struct egl_g3d_context *gctx = egl_g3d_context(context_private);
 531    egl_g3d_validate_context(gctx->base.Resource.Display, &gctx->base);
 532 }
 533
 534 static EGLBoolean
 535 egl_g3d_terminate(_EGLDriver *drv, _EGLDisplay *dpy)
 536 {
 537    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 538    EGLint i;
 539
 540    _eglReleaseDisplayResources(drv, dpy);
 541    _eglCleanupDisplay(dpy);
 542
 543    if (dpy->Screens) {
 544       for (i = 0; i < dpy->NumScreens; i++) {
 545          struct egl_g3d_screen *gscr = egl_g3d_screen(dpy->Screens[i]);
 546          free(gscr->native_modes);
 547          free(gscr);
 548       }
 549       free(dpy->Screens);
 550    }
 551
 552    if (gdpy->native)
 553       gdpy->native->destroy(gdpy->native);
 554
 555    free(gdpy);
 556    dpy->DriverData = NULL;
 557
 558    return EGL_TRUE;
 559 }
 560
 561 static EGLBoolean
 562 egl_g3d_initialize(_EGLDriver *drv, _EGLDisplay *dpy,
 563                    EGLint *major, EGLint *minor)
 564 {
 565    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
 566    struct egl_g3d_display *gdpy;
 567
 568    /* the probe object is unlikely to be needed again */
 569    egl_g3d_destroy_probe(drv, dpy);
 570
 571    gdpy = CALLOC_STRUCT(egl_g3d_display);
 572    if (!gdpy) {
 573       _eglError(EGL_BAD_ALLOC, "eglInitialize");
 574       goto fail;
 575    }
 576    dpy->DriverData = gdpy;
 577
 578    gdpy->native = native_create_display(dpy->NativeDisplay);
 579    if (!gdpy->native) {
 580       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(no usable display)");
 581       goto fail;
 582    }
 583
 584    gdpy->native->screen->flush_frontbuffer = egl_g3d_flush_frontbuffer;
 585    gdpy->native->screen->update_buffer = egl_g3d_update_buffer;
 586
 587    egl_g3d_init_st(&gdrv->base);
 588    dpy->ClientAPIsMask = gdrv->api_mask;
 589
 590 #ifdef EGL_MESA_screen_surface
 591    /* enable MESA_screen_surface before adding (and validating) configs */
 592    if (gdpy->native->modeset) {
 593       dpy->Extensions.MESA_screen_surface = EGL_TRUE;
 594       egl_g3d_add_screens(drv, dpy);
 595    }
 596 #endif
 597
 598    if (egl_g3d_add_configs(drv, dpy, 1) == 1) {
 599       _eglError(EGL_NOT_INITIALIZED, "eglInitialize(unable to add configs)");
 600       goto fail;
 601    }
 602
 603    *major = 1;
 604    *minor = 4;
 605
 606    return EGL_TRUE;
 607
 608 fail:
 609    if (gdpy)
 610       egl_g3d_terminate(drv, dpy);
 611    return EGL_FALSE;
 612 }
 613
 614 static _EGLContext *
 615 egl_g3d_create_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 616                        _EGLContext *share, const EGLint *attribs)
 617 {
 618    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 619    struct egl_g3d_context *gshare = egl_g3d_context(share);
 620    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 621    struct egl_g3d_context *gctx;
 622    const __GLcontextModes *mode;
 623
 624    gctx = CALLOC_STRUCT(egl_g3d_context);
 625    if (!gctx) {
 626       _eglError(EGL_BAD_ALLOC, "eglCreateContext");
 627       return NULL;
 628    }
 629
 630    if (!_eglInitContext(&gctx->base, dpy, conf, attribs)) {
 631       free(gctx);
 632       return NULL;
 633    }
 634
 635    gctx->stapi = egl_g3d_choose_st(drv, &gctx->base);
 636    if (!gctx->stapi) {
 637       free(gctx);
 638       return NULL;
 639    }
 640
 641    mode = &gconf->native->mode;
 642
 643    gctx->pipe = gdpy->native->screen->context_create(
 644       gdpy->native->screen,
 645       (void *) &gctx->base);
 646
 647    if (!gctx->pipe) {
 648       free(gctx);
 649       return NULL;
 650    }
 651
 652    gctx->st_ctx = gctx->stapi->st_create_context(gctx->pipe, mode,
 653                         (gshare) ? gshare->st_ctx : NULL);
 654    if (!gctx->st_ctx) {
 655       gctx->pipe->destroy(gctx->pipe);
 656       free(gctx);
 657       return NULL;
 658    }
 659
 660    return &gctx->base;
 661 }
 662
 663 /**
 664  * Destroy a context.
 665  */
 666 static void
 667 destroy_context(_EGLDisplay *dpy, _EGLContext *ctx)
 668 {
 669    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 670
 671    /* FIXME a context might live longer than its display */
 672    if (!dpy->Initialized)
 673       _eglLog(_EGL_FATAL, "destroy a context with an unitialized display");
 674
 675    egl_g3d_realloc_context(dpy, &gctx->base);
 676    /* it will destroy the associated pipe context */
 677    gctx->stapi->st_destroy_context(gctx->st_ctx);
 678
 679    free(gctx);
 680 }
 681
 682 static EGLBoolean
 683 egl_g3d_destroy_context(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 684 {
 685    if (!_eglIsContextBound(ctx))
 686       destroy_context(dpy, ctx);
 687    return EGL_TRUE;
 688 }
 689
 690 struct egl_g3d_create_surface_arg {
 691    EGLint type;
 692    union {
 693       EGLNativeWindowType win;
 694       EGLNativePixmapType pix;
 695    } u;
 696 };
 697
 698 static _EGLSurface *
 699 egl_g3d_create_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf,
 700                        struct egl_g3d_create_surface_arg *arg,
 701                        const EGLint *attribs)
 702 {
 703    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 704    struct egl_g3d_config *gconf = egl_g3d_config(conf);
 705    struct egl_g3d_surface *gsurf;
 706    struct native_surface *nsurf;
 707    const char *err;
 708
 709    switch (arg->type) {
 710    case EGL_WINDOW_BIT:
 711       err = "eglCreateWindowSurface";
 712       break;
 713    case EGL_PIXMAP_BIT:
 714       err = "eglCreatePixmapSurface";
 715       break;
 716    case EGL_PBUFFER_BIT:
 717       err = "eglCreatePBufferSurface";
 718       break;
 719 #ifdef EGL_MESA_screen_surface
 720    case EGL_SCREEN_BIT_MESA:
 721       err = "eglCreateScreenSurface";
 722       break;
 723 #endif
 724    default:
 725       err = "eglCreateUnknownSurface";
 726       break;
 727    }
 728
 729    gsurf = CALLOC_STRUCT(egl_g3d_surface);
 730    if (!gsurf) {
 731       _eglError(EGL_BAD_ALLOC, err);
 732       return NULL;
 733    }
 734
 735    if (!_eglInitSurface(&gsurf->base, dpy, arg->type, conf, attribs)) {
 736       free(gsurf);
 737       return NULL;
 738    }
 739
 740    /* create the native surface */
 741    switch (arg->type) {
 742    case EGL_WINDOW_BIT:
 743       nsurf = gdpy->native->create_window_surface(gdpy->native,
 744             arg->u.win, gconf->native);
 745       break;
 746    case EGL_PIXMAP_BIT:
 747       nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
 748             arg->u.pix, gconf->native);
 749       break;
 750    case EGL_PBUFFER_BIT:
 751       nsurf = gdpy->native->create_pbuffer_surface(gdpy->native,
 752             gconf->native, gsurf->base.Width, gsurf->base.Height);
 753       break;
 754 #ifdef EGL_MESA_screen_surface
 755    case EGL_SCREEN_BIT_MESA:
 756       /* prefer back buffer (move to _eglInitSurface?) */
 757       gsurf->base.RenderBuffer = EGL_BACK_BUFFER;
 758       nsurf = gdpy->native->modeset->create_scanout_surface(gdpy->native,
 759             gconf->native, gsurf->base.Width, gsurf->base.Height);
 760       break;
 761 #endif
 762    default:
 763       nsurf = NULL;
 764       break;
 765    }
 766
 767    if (!nsurf) {
 768       free(gsurf);
 769       return NULL;
 770    }
 771    /* initialize the geometry */
 772    if (!nsurf->validate(nsurf, 0x0, &gsurf->sequence_number, NULL,
 773             &gsurf->base.Width, &gsurf->base.Height)) {
 774       nsurf->destroy(nsurf);
 775       free(gsurf);
 776       return NULL;
 777    }
 778
 779    gsurf->native = nsurf;
 780
 781    gsurf->render_att = (gsurf->base.RenderBuffer == EGL_SINGLE_BUFFER) ?
 782       NATIVE_ATTACHMENT_FRONT_LEFT : NATIVE_ATTACHMENT_BACK_LEFT;
 783    if (!gconf->native->mode.doubleBufferMode)
 784       gsurf->render_att = NATIVE_ATTACHMENT_FRONT_LEFT;
 785
 786    return &gsurf->base;
 787 }
 788
 789 static _EGLSurface *
 790 egl_g3d_create_window_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 791                               _EGLConfig *conf, EGLNativeWindowType win,
 792                               const EGLint *attribs)
 793 {
 794    struct egl_g3d_create_surface_arg arg;
 795
 796    memset(&arg, 0, sizeof(arg));
 797    arg.type = EGL_WINDOW_BIT;
 798    arg.u.win = win;
 799
 800    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 801 }
 802
 803 static _EGLSurface *
 804 egl_g3d_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 805                               _EGLConfig *conf, EGLNativePixmapType pix,
 806                               const EGLint *attribs)
 807 {
 808    struct egl_g3d_create_surface_arg arg;
 809
 810    memset(&arg, 0, sizeof(arg));
 811    arg.type = EGL_PIXMAP_BIT;
 812    arg.u.pix = pix;
 813
 814    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 815 }
 816
 817 static _EGLSurface *
 818 egl_g3d_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 819                                _EGLConfig *conf, const EGLint *attribs)
 820 {
 821    struct egl_g3d_create_surface_arg arg;
 822
 823    memset(&arg, 0, sizeof(arg));
 824    arg.type = EGL_PBUFFER_BIT;
 825
 826    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
 827 }
 828
 829 /**
 830  * Destroy a surface.
 831  */
 832 static void
 833 destroy_surface(_EGLDisplay *dpy, _EGLSurface *surf)
 834 {
 835    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 836
 837    /* FIXME a surface might live longer than its display */
 838    if (!dpy->Initialized)
 839       _eglLog(_EGL_FATAL, "destroy a surface with an unitialized display");
 840
 841    pipe_surface_reference(&gsurf->render_surface, NULL);
 842    gsurf->native->destroy(gsurf->native);
 843    free(gsurf);
 844 }
 845
 846 static EGLBoolean
 847 egl_g3d_destroy_surface(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 848 {
 849    if (!_eglIsSurfaceBound(surf))
 850       destroy_surface(dpy, surf);
 851    return EGL_TRUE;
 852 }
 853
 854 static EGLBoolean
 855 egl_g3d_make_current(_EGLDriver *drv, _EGLDisplay *dpy,
 856                      _EGLSurface *draw, _EGLSurface *read, _EGLContext *ctx)
 857 {
 858    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
 859    struct egl_g3d_surface *gdraw = egl_g3d_surface(draw);
 860    struct egl_g3d_context *old_gctx;
 861    EGLBoolean ok = EGL_TRUE;
 862
 863    /* bind the new context and return the "orphaned" one */
 864    if (!_eglBindContext(&ctx, &draw, &read))
 865       return EGL_FALSE;
 866    old_gctx = egl_g3d_context(ctx);
 867
 868    if (old_gctx) {
 869       /* flush old context */
 870       old_gctx->stapi->st_flush(old_gctx->st_ctx,
 871             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
 872
 873       /*
 874        * The old context is no longer current, and egl_g3d_realloc_context()
 875        * should be called to destroy the framebuffers.  However, it is possible
 876        * that it will be made current again with the same draw/read surfaces.
 877        * It might be better to keep it around.
 878        */
 879    }
 880
 881    if (gctx) {
 882       ok = egl_g3d_realloc_context(dpy, &gctx->base);
 883       if (ok) {
 884          ok = gctx->stapi->st_make_current(gctx->st_ctx,
 885                gctx->draw.st_fb, gctx->read.st_fb);
 886          if (ok) {
 887             egl_g3d_validate_context(dpy, &gctx->base);
 888             if (gdraw->base.Type == EGL_WINDOW_BIT) {
 889                gctx->base.WindowRenderBuffer =
 890                   (gdraw->render_att == NATIVE_ATTACHMENT_FRONT_LEFT) ?
 891                   EGL_SINGLE_BUFFER : EGL_BACK_BUFFER;
 892             }
 893          }
 894       }
 895    }
 896    else if (old_gctx) {
 897       ok = old_gctx->stapi->st_make_current(NULL, NULL, NULL);
 898       old_gctx->base.WindowRenderBuffer = EGL_NONE;
 899    }
 900
 901    if (ctx && !_eglIsContextLinked(ctx))
 902       destroy_context(dpy, ctx);
 903    if (draw && !_eglIsSurfaceLinked(draw))
 904       destroy_surface(dpy, draw);
 905    if (read && read != draw && !_eglIsSurfaceLinked(read))
 906       destroy_surface(dpy, read);
 907
 908    return ok;
 909 }
 910
 911 static EGLBoolean
 912 egl_g3d_swap_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 913 {
 914    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 915    _EGLContext *ctx = _eglGetCurrentContext();
 916    struct egl_g3d_context *gctx = NULL;
 917
 918    /* no-op for pixmap or pbuffer surface */
 919    if (gsurf->base.Type == EGL_PIXMAP_BIT ||
 920        gsurf->base.Type == EGL_PBUFFER_BIT)
 921       return EGL_TRUE;
 922
 923    /* or when the surface is single-buffered */
 924    if (gsurf->render_att == NATIVE_ATTACHMENT_FRONT_LEFT)
 925       return EGL_TRUE;
 926
 927    if (ctx && ctx->DrawSurface == surf)
 928       gctx = egl_g3d_context(ctx);
 929
 930    /* flush if the surface is current */
 931    if (gctx)
 932       gctx->stapi->st_notify_swapbuffers(gctx->draw.st_fb);
 933
 934    return gsurf->native->swap_buffers(gsurf->native);
 935 }
 936
 937 /**
 938  * Find a config that supports the pixmap.
 939  */
 940 static _EGLConfig *
 941 find_pixmap_config(_EGLDisplay *dpy, EGLNativePixmapType pix)
 942 {
 943    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 944    struct egl_g3d_config *gconf;
 945    EGLint i;
 946
 947    for (i = 0; i < dpy->NumConfigs; i++) {
 948       gconf = egl_g3d_config(dpy->Configs[i]);
 949       if (gdpy->native->is_pixmap_supported(gdpy->native, pix, gconf->native))
 950          break;
 951    }
 952
 953    return (i < dpy->NumConfigs) ? &gconf->base : NULL;
 954 }
 955
 956 /**
 957  * Get the pipe surface of the given attachment of the native surface.
 958  */
 959 static struct pipe_surface *
 960 get_pipe_surface(struct native_display *ndpy, struct native_surface *nsurf,
 961                  enum native_attachment natt)
 962 {
 963    struct pipe_texture *textures[NUM_NATIVE_ATTACHMENTS];
 964    struct pipe_surface *psurf;
 965
 966    textures[natt] = NULL;
 967    nsurf->validate(nsurf, 1 << natt, NULL, textures, NULL, NULL);
 968    if (!textures[natt])
 969       return NULL;
 970
 971    psurf = ndpy->screen->get_tex_surface(ndpy->screen, textures[natt],
 972          0, 0, 0, PIPE_BUFFER_USAGE_CPU_WRITE);
 973    pipe_texture_reference(&textures[natt], NULL);
 974
 975    return psurf;
 976 }
 977
 978 static EGLBoolean
 979 egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
 980                      EGLNativePixmapType target)
 981 {
 982    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
 983    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
 984    _EGLContext *ctx = _eglGetCurrentContext();
 985    struct egl_g3d_config *gconf;
 986    struct native_surface *nsurf;
 987    struct pipe_screen *screen = gdpy->native->screen;
 988    struct pipe_surface *psurf;
 989
 990    if (!gsurf->render_surface)
 991       return EGL_TRUE;
 992
 993    gconf = egl_g3d_config(find_pixmap_config(dpy, target));
 994    if (!gconf)
 995       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
 996
 997    nsurf = gdpy->native->create_pixmap_surface(gdpy->native,
 998          target, gconf->native);
 999    if (!nsurf)
1000       return _eglError(EGL_BAD_NATIVE_PIXMAP, "eglCopyBuffers");
1001
1002    /* flush if the surface is current */
1003    if (ctx && ctx->DrawSurface == &gsurf->base) {
1004       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1005       gctx->stapi->st_flush(gctx->st_ctx,
1006             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1007    }
1008
1009    psurf = get_pipe_surface(gdpy->native, nsurf, NATIVE_ATTACHMENT_FRONT_LEFT);
1010    if (psurf) {
1011       struct pipe_context pipe;
1012
1013       /**
1014        * XXX This is hacky.  If we might allow the EGLDisplay to create a pipe
1015        * context of its own and use the blitter context for this.
1016        */
1017       memset(&pipe, 0, sizeof(pipe));
1018       pipe.screen = screen;
1019
1020       util_surface_copy(&pipe, FALSE, psurf, 0, 0,
1021             gsurf->render_surface, 0, 0, psurf->width, psurf->height);
1022
1023       pipe_surface_reference(&psurf, NULL);
1024       nsurf->flush_frontbuffer(nsurf);
1025    }
1026
1027    nsurf->destroy(nsurf);
1028
1029    return EGL_TRUE;
1030 }
1031
1032 static EGLBoolean
1033 egl_g3d_wait_client(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
1034 {
1035    struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1036    gctx->stapi->st_finish(gctx->st_ctx);
1037    return EGL_TRUE;
1038 }
1039
1040 static EGLBoolean
1041 egl_g3d_wait_native(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine)
1042 {
1043    _EGLContext *ctx = _eglGetCurrentContext();
1044
1045    if (engine != EGL_CORE_NATIVE_ENGINE)
1046       return _eglError(EGL_BAD_PARAMETER, "eglWaitNative");
1047
1048    if (ctx && ctx->DrawSurface) {
1049       struct egl_g3d_surface *gsurf = egl_g3d_surface(ctx->DrawSurface);
1050       gsurf->native->wait(gsurf->native);
1051    }
1052
1053    return EGL_TRUE;
1054 }
1055
1056 static _EGLProc
1057 egl_g3d_get_proc_address(_EGLDriver *drv, const char *procname)
1058 {
1059    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1060    _EGLProc proc;
1061    EGLint i;
1062
1063    /* in case this is called before a display is initialized */
1064    egl_g3d_init_st(&gdrv->base);
1065
1066    for (i = 0; i < NUM_EGL_G3D_STS; i++) {
1067       const struct egl_g3d_st *stapi = gdrv->stapis[i];
1068       if (stapi) {
1069          proc = (_EGLProc) stapi->st_get_proc_address(procname);
1070          if (proc)
1071             return proc;
1072       }
1073    }
1074
1075    return (_EGLProc) NULL;
1076 }
1077
1078 static EGLBoolean
1079 egl_g3d_bind_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1080                        _EGLSurface *surf, EGLint buffer)
1081 {
1082    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1083    _EGLContext *es1 = _eglGetAPIContext(EGL_OPENGL_ES_API);
1084    struct egl_g3d_context *gctx;
1085    enum pipe_format target_format;
1086    int target;
1087
1088    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT)
1089       return _eglError(EGL_BAD_SURFACE, "eglBindTexImage");
1090    if (buffer != EGL_BACK_BUFFER)
1091       return _eglError(EGL_BAD_PARAMETER, "eglBindTexImage");
1092    if (gsurf->base.BoundToTexture)
1093       return _eglError(EGL_BAD_ACCESS, "eglBindTexImage");
1094
1095    switch (gsurf->base.TextureFormat) {
1096    case EGL_TEXTURE_RGB:
1097       target_format = PIPE_FORMAT_R8G8B8_UNORM;
1098       break;
1099    case EGL_TEXTURE_RGBA:
1100       target_format = PIPE_FORMAT_B8G8R8A8_UNORM;
1101       break;
1102    default:
1103       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1104    }
1105
1106    switch (gsurf->base.TextureTarget) {
1107    case EGL_TEXTURE_2D:
1108       target = ST_TEXTURE_2D;
1109       break;
1110    default:
1111       return _eglError(EGL_BAD_MATCH, "eglBindTexImage");
1112    }
1113
1114    if (!es1)
1115       return EGL_TRUE;
1116    if (!gsurf->render_surface)
1117       return EGL_FALSE;
1118
1119    /* flush properly if the surface is bound */
1120    if (gsurf->base.CurrentContext) {
1121       gctx = egl_g3d_context(gsurf->base.CurrentContext);
1122       gctx->stapi->st_flush(gctx->st_ctx,
1123             PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL);
1124    }
1125
1126    gctx = egl_g3d_context(es1);
1127    gctx->stapi->st_bind_texture_surface(gsurf->render_surface,
1128          target, gsurf->base.MipmapLevel, target_format);
1129
1130    gsurf->base.BoundToTexture = EGL_TRUE;
1131
1132    return EGL_TRUE;
1133 }
1134
1135 static EGLBoolean
1136 egl_g3d_release_tex_image(_EGLDriver *drv, _EGLDisplay *dpy,
1137                           _EGLSurface *surf, EGLint buffer)
1138 {
1139    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1140
1141    if (!gsurf || gsurf->base.Type != EGL_PBUFFER_BIT ||
1142        !gsurf->base.BoundToTexture)
1143       return _eglError(EGL_BAD_SURFACE, "eglReleaseTexImage");
1144    if (buffer != EGL_BACK_BUFFER)
1145       return _eglError(EGL_BAD_PARAMETER, "eglReleaseTexImage");
1146
1147    if (gsurf->render_surface) {
1148       _EGLContext *ctx = _eglGetAPIContext(EGL_OPENGL_ES_API);
1149       struct egl_g3d_context *gctx = egl_g3d_context(ctx);
1150
1151       /* what if the context the surface binds to is no longer current? */
1152       if (gctx)
1153          gctx->stapi->st_unbind_texture_surface(gsurf->render_surface,
1154                ST_TEXTURE_2D, gsurf->base.MipmapLevel);
1155    }
1156
1157    gsurf->base.BoundToTexture = EGL_FALSE;
1158
1159    return EGL_TRUE;
1160 }
1161
1162 #ifdef EGL_MESA_screen_surface
1163
1164 static _EGLSurface *
1165 egl_g3d_create_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1166                               _EGLConfig *conf, const EGLint *attribs)
1167 {
1168    struct egl_g3d_create_surface_arg arg;
1169
1170    memset(&arg, 0, sizeof(arg));
1171    arg.type = EGL_SCREEN_BIT_MESA;
1172
1173    return egl_g3d_create_surface(drv, dpy, conf, &arg, attribs);
1174 }
1175
1176 static EGLBoolean
1177 egl_g3d_show_screen_surface(_EGLDriver *drv, _EGLDisplay *dpy,
1178                             _EGLScreen *scr, _EGLSurface *surf,
1179                             _EGLMode *mode)
1180 {
1181    struct egl_g3d_display *gdpy = egl_g3d_display(dpy);
1182    struct egl_g3d_screen *gscr = egl_g3d_screen(scr);
1183    struct egl_g3d_surface *gsurf = egl_g3d_surface(surf);
1184    struct native_surface *nsurf;
1185    const struct native_mode *nmode;
1186    EGLBoolean changed;
1187
1188    if (gsurf) {
1189       EGLint idx;
1190
1191       if (!mode)
1192          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1193       if (gsurf->base.Type != EGL_SCREEN_BIT_MESA)
1194          return _eglError(EGL_BAD_SURFACE, "eglShowScreenSurfaceMESA");
1195       if (gsurf->base.Width < mode->Width || gsurf->base.Height < mode->Height)
1196          return _eglError(EGL_BAD_MATCH,
1197                "eglShowSurfaceMESA(surface smaller than mode size)");
1198
1199       /* find the index of the mode */
1200       for (idx = 0; idx < gscr->base.NumModes; idx++)
1201          if (mode == &gscr->base.Modes[idx])
1202             break;
1203       if (idx >= gscr->base.NumModes) {
1204          return _eglError(EGL_BAD_MODE_MESA,
1205                "eglShowSurfaceMESA(unknown mode)");
1206       }
1207
1208       nsurf = gsurf->native;
1209       nmode = gscr->native_modes[idx];
1210    }
1211    else {
1212       if (mode)
1213          return _eglError(EGL_BAD_MATCH, "eglShowSurfaceMESA");
1214
1215       /* disable the screen */
1216       nsurf = NULL;
1217       nmode = NULL;
1218    }
1219
1220    /* TODO surface panning by CRTC choosing */
1221    changed = gdpy->native->modeset->program(gdpy->native, 0, nsurf,
1222          gscr->base.OriginX, gscr->base.OriginY, &gscr->native, 1, nmode);
1223    if (changed) {
1224       gscr->base.CurrentSurface = &gsurf->base;
1225       gscr->base.CurrentMode = mode;
1226    }
1227
1228    return changed;
1229 }
1230
1231 #endif /* EGL_MESA_screen_surface */
1232
1233 static EGLint
1234 egl_g3d_probe(_EGLDriver *drv, _EGLDisplay *dpy)
1235 {
1236    struct native_probe *nprobe;
1237    enum native_probe_result res;
1238    EGLint score;
1239
1240    nprobe = egl_g3d_get_probe(drv, dpy);
1241    res = native_get_probe_result(nprobe);
1242
1243    switch (res) {
1244    case NATIVE_PROBE_UNKNOWN:
1245    default:
1246       score = 0;
1247       break;
1248    case NATIVE_PROBE_FALLBACK:
1249       score = 40;
1250       break;
1251    case NATIVE_PROBE_SUPPORTED:
1252       score = 50;
1253       break;
1254    case NATIVE_PROBE_EXACT:
1255       score = 100;
1256       break;
1257    }
1258
1259    return score;
1260 }
1261
1262 static void
1263 egl_g3d_unload(_EGLDriver *drv)
1264 {
1265    struct egl_g3d_driver *gdrv = egl_g3d_driver(drv);
1266
1267    egl_g3d_destroy_probe(drv, NULL);
1268    free(gdrv);
1269 }
1270
1271 _EGLDriver *
1272 _eglMain(const char *args)
1273 {
1274    static char driver_name[64];
1275    struct egl_g3d_driver *gdrv;
1276
1277    snprintf(driver_name, sizeof(driver_name),
1278          "Gallium/%s", native_get_name());
1279
1280    gdrv = CALLOC_STRUCT(egl_g3d_driver);
1281    if (!gdrv)
1282       return NULL;
1283
1284    _eglInitDriverFallbacks(&gdrv->base);
1285
1286    gdrv->base.API.Initialize = egl_g3d_initialize;
1287    gdrv->base.API.Terminate = egl_g3d_terminate;
1288    gdrv->base.API.CreateContext = egl_g3d_create_context;
1289    gdrv->base.API.DestroyContext = egl_g3d_destroy_context;
1290    gdrv->base.API.CreateWindowSurface = egl_g3d_create_window_surface;
1291    gdrv->base.API.CreatePixmapSurface = egl_g3d_create_pixmap_surface;
1292    gdrv->base.API.CreatePbufferSurface = egl_g3d_create_pbuffer_surface;
1293    gdrv->base.API.DestroySurface = egl_g3d_destroy_surface;
1294    gdrv->base.API.MakeCurrent = egl_g3d_make_current;
1295    gdrv->base.API.SwapBuffers = egl_g3d_swap_buffers;
1296    gdrv->base.API.CopyBuffers = egl_g3d_copy_buffers;
1297    gdrv->base.API.WaitClient = egl_g3d_wait_client;
1298    gdrv->base.API.WaitNative = egl_g3d_wait_native;
1299    gdrv->base.API.GetProcAddress = egl_g3d_get_proc_address;
1300
1301    gdrv->base.API.BindTexImage = egl_g3d_bind_tex_image;
1302    gdrv->base.API.ReleaseTexImage = egl_g3d_release_tex_image;
1303
1304 #ifdef EGL_MESA_screen_surface
1305    gdrv->base.API.CreateScreenSurfaceMESA = egl_g3d_create_screen_surface;
1306    gdrv->base.API.ShowScreenSurfaceMESA = egl_g3d_show_screen_surface;
1307 #endif
1308
1309    gdrv->base.Name = driver_name;
1310    gdrv->base.Probe = egl_g3d_probe;
1311    gdrv->base.Unload = egl_g3d_unload;
1312
1313    /* the key is " EGL G3D" */
1314    gdrv->probe_key = 0x0E61063D;
1315
1316    return &gdrv->base;
1317 }